CN111604468A - Mould for casting brake drum by static pressure line high-pressure molding process - Google Patents
Mould for casting brake drum by static pressure line high-pressure molding process Download PDFInfo
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- CN111604468A CN111604468A CN202010656798.0A CN202010656798A CN111604468A CN 111604468 A CN111604468 A CN 111604468A CN 202010656798 A CN202010656798 A CN 202010656798A CN 111604468 A CN111604468 A CN 111604468A
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- 238000000465 moulding Methods 0.000 title claims abstract description 57
- 238000005266 casting Methods 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000008569 process Effects 0.000 title claims abstract description 28
- 230000003068 static effect Effects 0.000 title claims abstract description 22
- 238000007493 shaping process Methods 0.000 claims description 6
- 230000007547 defect Effects 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 15
- 238000013461 design Methods 0.000 abstract description 5
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 239000003110 molding sand Substances 0.000 description 6
- 244000035744 Hura crepitans Species 0.000 description 4
- 238000007711 solidification Methods 0.000 description 4
- 230000008023 solidification Effects 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 3
- 230000008520 organization Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
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- 238000000576 coating method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000003031 feeding effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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- 239000000463 material Substances 0.000 description 1
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- 239000011148 porous material Substances 0.000 description 1
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- 238000010112 shell-mould casting Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
- B22C7/005—Adjustable, sectional, expandable or flexible patterns
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
- B22C15/28—Compacting by different means acting simultaneously or successively, e.g. preliminary blowing and finally pressing
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Abstract
The invention discloses a mould for casting a brake drum by a static pressure line high-pressure molding process, which comprises an upper mould, a lower mould and a pouring system forming mould, wherein the upper mould comprises an upper template and an upper model, and the upper model is detachably connected with the upper template; the lower die comprises a lower template and a lower die, and the lower die is detachably connected with the lower template; the gating system forming die comprises an upper gating system forming die and a lower gating system forming die, wherein the upper gating system forming die is installed on the upper template in an assembling mode, the lower gating system forming die is installed on the lower template in an assembling mode, and the upper gating system forming die is connected with the upper template. The template, the model and the casting system forming die are manufactured by adopting a split type design, the production period is shortened, and the template, the model and the casting system forming die are assembled by detachable connection, so that the template, the model and the casting system forming die are mutually independent and can be disassembled and replaced at any time, and the problem that the whole set of die is scrapped due to the asynchronous service life of each part is solved.
Description
Technical Field
The invention relates to the technical field of brake drum casting, in particular to a mold for casting a brake drum by a static pressure line high-pressure molding process.
Background
The existing heavy truck brake drum casting production process mainly comprises the following steps: a static pressure line high-pressure molding process, an iron mold sand coating process, an iron sand shell molding process, a bimetal centrifugal molding process and the like; the static pressure line high-pressure molding process is a mainstream process of the products, molding sand is preliminarily compacted through air pre-tightening effect, then the molding sand is finally compacted through a hydraulic multi-contact pressure head, and the multi-contact pressure head provides pressure through hydraulic pressure and compacts the molding sand through pressure, so the static pressure molding process is called. The method can ensure that the molding sand has high compactness, and is suitable for the casting molding with high automation degree and complex process. When the brake drum is cast by adopting a static pressure line high-pressure molding process, the structures of a template, a model and a casting system forming die which are arranged in molding sand and used for forming a casting cavity model and the design and manufacturing technology thereof are key technologies of the process.
The traditional mould adopted at present is designed and manufactured by integrating a template, a model and a casting system forming mould, and the designed casting system forming mould is mainly manufactured into a brake drum according to the simultaneous solidification principle by adopting a side annular casting form. The integrated design adopted by the traditional mold has higher cost in the mold manufacturing process and long manufacturing period, a set of template can only be used for the production of a product, and meanwhile, because the service life of the mold is asynchronous with that of the template (the service life of the mold is 25000-40000 times, and the service life of the template is 80000-100000 times), the whole set of mold is scrapped when the mold or the template is produced, and the production cost is increased.
Disclosure of Invention
Therefore, the mould for casting the brake drum by the static pressure line high-pressure molding process is necessary to solve the problems of long manufacturing period and high loss of the mould by separately designing and independently manufacturing the template, the model and the casting system forming mould and forming the upper mould and the lower mould by detachable connection and assembly.
A mold for casting a brake drum by a static pressure line high pressure molding process, comprising:
the upper die comprises an upper template and an upper model, and the upper model is detachably connected with the upper template;
the lower die comprises a lower template and a lower die, and the lower die is detachably connected with the lower template;
the gating system forming die comprises an upper gating system forming die and a lower gating system forming die, wherein the upper gating system forming die is installed on an upper template in an assembling mode, the lower gating system forming die is installed on a lower template in an assembling mode, and the upper gating system forming die is connected with the upper template.
In one embodiment, a first spigot through hole is formed in the parting surface of the upper template, and the bottom of the upper model is detachably connected with the upper template at the first spigot through hole; a second spigot through hole is formed in the parting surface of the lower template, and the lower template penetrates through the second spigot through hole to be detachably connected with the lower template.
In one embodiment, an upper model sinking assembly surface is arranged on the periphery of the first spigot through hole of the parting surface of the upper template, and the bottom of the upper model is matched with the upper model sinking assembly surface; the periphery of the second spigot through hole of the parting surface of the lower template is provided with a lower model sinking assembly surface, and the bottom of the lower model is matched with the lower model sinking assembly surface.
In one embodiment, the bottom of the upper model is provided with a first flange, and the first flange is matched with the sinking assembly surface of the upper model and is detachably connected with the upper template; the bottom of the lower model is provided with a second flange, and the lower model is sunk into the assembly surface to be matched with the lower model through the second flange and is detachably connected with the lower template.
In one embodiment, the die further comprises a second upper die and a second lower die, wherein a third seam allowance through hole is formed in the parting surface of the upper die plate, a fourth seam allowance through hole is formed in the parting surface of the lower die plate, and the third seam allowance through hole and the fourth seam allowance through hole are respectively parallel to the first seam allowance through hole and the second seam allowance through hole; the connection mode of the second upper die on the upper die plate and the third seam allowance through hole is the same as that of the upper die on the upper die plate and the first seam allowance through hole; the connection mode of the second lower model between the lower template and the fourth seam allowance through hole is the same as that of the lower model between the lower template and the second seam allowance through hole.
In one embodiment, the second upper and lower molds are of the same or different type than the upper and lower molds.
In one embodiment, the upper gating system forming die comprises a vertically arranged sprue forming die and a cross runner forming die arranged at the bottom of the sprue forming die, wherein the cross runner forming die is provided with at least one riser forming die, the riser forming die is provided with at least one riser neck forming die, and the sprue forming die and the cross runner forming die are detachably arranged on the parting surface of the upper shaping plate according to the actual forming direction and are connected with the upper die through the riser neck forming die; the lower pouring system forming die comprises a sprue seat forming die, wherein the sprue seat forming die is detachably mounted on the parting surface of the lower template according to the actual forming direction and corresponds to the sprue forming die and the cross runner forming die in position.
In one embodiment, when only one set of the molds is provided, the runner forming mold is provided on one side of the mold; when two sets of models are provided, the cross runner forming die is arranged between the two sets of models.
In one embodiment, the number of the riser forming dies is two; when only one group of models is arranged, the two riser forming molds are uniformly distributed on one side of the group of models; when two groups of models are arranged, two riser forming dies are uniformly distributed between the two groups of models, and each riser forming die is provided with two riser neck forming dies which are respectively connected with the two groups of models.
In one embodiment, a plurality of exhaust columns are arranged at the top of the upper model and used for exhausting the cavity and reducing the defect of casting pores; when two sets of models are provided, a plurality of exhaust columns are also provided on the top of the second upper model.
Compared with the prior art, the template, the model and the casting system forming die are manufactured by adopting a split type design, the production period is shortened, and the template, the model and the casting system forming die are assembled by detachable connection, so that the template, the model and the casting system forming die are mutually independent and can be disassembled, assembled and replaced at any time, and the problem that the whole set of die is scrapped due to the asynchronous service life of each part is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings of the embodiments can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an upper mold according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a lower mold according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a molding die of a gating system according to an embodiment of the present invention;
FIG. 4 is a top view of FIG. 1;
FIG. 5 is a cross-sectional view of the molding cavity within the mold flask as viewed in the direction A-A of FIG. 4;
FIG. 6 is a cross-sectional view of the molding cavity within the mold flask as viewed in the direction B-B of FIG. 4;
FIG. 7 is a schematic structural diagram of an upper template provided in an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of an upper model according to an embodiment of the present invention;
FIG. 9 is a schematic structural diagram of a lower template provided in an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a lower model according to an embodiment of the present invention.
Wherein: 1-upper die, 11-upper template, 111-first spigot through hole, 112-upper die sinking assembly plane, 113-third spigot through hole, 114-upper template parting plane, 115-upper locating hole, 12-upper die, 121-first flange, 122-central vent post, 123-edge vent post, 13-second upper die, 2-lower die, 21-lower template, 211-second spigot through hole, 212-lower die sinking assembly plane, 213-fourth spigot through hole, 214-lower template parting plane, 215-lower locating hole, 22-lower die, 221-second flange, 222-lower die top support ring, 23-second lower die, 3-casting system forming die, 31-upper casting system forming die, 311-straight runner forming die, 312-runner molding die, 313-riser molding die, 3131-riser neck molding die, 32-lower gating system molding die, 321-sprue base molding die, 10-molding cavity, 20-second molding cavity, 30-gating system, 301-sprue, 302-sprue base, 303-runner, 304-riser, 305-riser neck, 401-central vent, 402-edge vent, 100-cope, 200-drag.
Detailed Description
To facilitate an understanding of the present invention, a mold for casting a brake drum using a static line high pressure molding process will be described more fully below with reference to the accompanying drawings. The preferred embodiment of the mold for casting the brake drum by the static pressure line high pressure molding process is shown in the attached drawings. However, the mold used for the hydrostatic line high pressure molding process to cast the brake drum may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete with respect to a mold for casting a brake drum using a static line high pressure molding process.
In the description of the present application, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the product of the application is used, the description is only for convenience and simplicity, and the indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation and be operated, and thus, should not be construed as limiting the present application.
It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "coupled" to another element, it can be directly coupled to the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the mold for the hydrostatic line high pressure molding process for casting brake drums is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
As shown in fig. 1 to 3, the invention provides a mold for casting a brake drum by a static pressure line high-pressure molding process, which comprises an upper mold 1, a lower mold 2 and a gating system forming mold 3, wherein the upper mold 1 comprises an upper shaping plate 11 and an upper mold 12, and the upper mold 12 is detachably connected with the upper shaping plate 11; the lower die 2 comprises a lower template 21 and a lower model 22, and the lower model 22 is detachably connected with the lower template 21; the gating system forming die 3 includes an upper gating system forming die 31 mounted on the upper mold plate 11 by an assembling manner, and a lower gating system forming die 32 mounted on the lower mold plate 21 by an assembling manner, the upper gating system forming die 31 being connected to the upper mold 12. Through split type design preparation upper template 11, go up mould 12, lower template 21, lower mould 22, go up gating system moulded die 31 and last gating system moulded die 32, mould production cycle has been reduced, and with upper template 11, go up mould 12 and last gating system moulded die 31, lower template 21, lower mould 22 and lower gating system moulded die 32 assemble through dismantling the connection, make mutual independence between each part, can dismouting change at any time, avoided between each part because of the life-span asynchronous lead to whole set of mould condemned problem to appear.
Specifically, the gating system forming mold 3 is formed in the actual molding orientation as shown in fig. 3, and a gating system 30 channel as shown in fig. 6 is formed in the molding flask to pour the molding cavity 10. The pouring system forming die 3 is installed in an assembling mode, namely after the pouring system forming die 3 is formed according to the actual forming direction, the upper pouring system forming die 31 is installed on the parting surface 114 of the upper template in a spatially opposite mode corresponding to the actual forming direction; the lower gating system forming die 32 is then spatially mounted on the lower plate parting surface 214 in an aligned manner corresponding to the actual forming orientation. As shown in fig. 4-6, the brake drum is cast by the static pressure line high pressure molding process, wherein the parting surface 214 of the lower template is upward, the drag flask 200 is arranged above the lower mold 2, a lower cavity with the same shape as the lower mold 2 of the parting surface 214 of the lower template is formed after sand filling molding, and a sand mold cavity is upward after turnover; then, the parting surface 114 of the upper template is upward, the cope flask 100 is placed above the upper die 1, an upper die cavity with the same shape as the upper die 1 of the parting surface 114 of the upper template is formed after sand filling and modeling, an air vent is pricked through a gas pricking machine, a sprue of a sprue 301 is milled to complete the upper die cavity, and a sand die cavity is downward; the cope flask 100 and the drag flask 200 are closed, and a brake drum forming cavity (comprising a forming cavity 10 and a second forming cavity 20) which is completely consistent with the shape of the mold and comprises a pouring system 30 and vent holes (comprising a central vent hole 401 and an edge vent hole 402) is formed in the cope flask and the drag flask; molten iron is poured through a sprue of a sprue 301, sequentially enters a sprue seat 302, a cross runner 303, a riser 304 and a riser neck 305, flows into a brake drum molding cavity from the riser neck 305, and is cooled to obtain the brake drum. The static pressure forming of the brake drum forming cavity is carried out by the mould provided by the invention, the brake drum can be cast by adopting the sequential solidification principle, and the possibility of occurrence of defects such as cracking, bottom falling and the like of the brake drum is reduced; and each part of the die provided by the invention is independent, and can be disassembled and replaced at any time, so that the problem that the whole set of die is scrapped due to asynchronous service life among the parts is avoided.
Further, as shown in fig. 1-2 and 7-10, a first spigot through hole 111 is formed on a parting surface 114 of the upper mold plate, and the bottom of the upper mold 12 can be detachably connected with the upper mold plate 11 at the first spigot through hole 111 through a bolt; a second spigot through hole 211 is formed in the parting surface 214 of the lower template, the lower template top support ring 222 penetrates through the second spigot through hole 211, and the bottom of the lower template 22 can be detachably connected with the lower template 21 through bolts. Specifically, the bottom of the upper mold 12 refers to the side of the upper mold 12 having an opening, the outer edge of the outer side of the bottom of the upper mold 12 is connected and fixed with the upper mold parting surface 114 at the first spigot through hole 111, and the upper mold parting surface 114 and the outer contour of the upper mold 12 form an upper cavity of the molding cavity 10; the bottom of the lower mold 22 is the other side of the lower mold top support ring 222, the lower mold top support ring 222 passes through the second seam allowance through hole 211 from the lower mold plate parting surface 214, and then the outer edge formed at the outer side of the bottom of the lower mold 22 is connected and fixed with the lower mold plate parting surface 214, so that the lower mold parting surface 214, the bottom contour of the lower mold 22 and the inner cavity of the lower mold 22 form a lower cavity of the molding cavity 10.
More specifically, as shown in fig. 7 and 9, the shape and the structure of the upper template 11 and the lower template 21 can be completely the same, and the upper template and the lower template are designed as standard parts and implemented according to standardization, and have universality after being manufactured; the upper model 12 and the lower model 22 can be designed, manufactured and combined according to brake drum products of different models, the outer edge which is suitable for the first spigot through hole 111 is integrally formed on the outer side of the bottom of the upper model 12, and the outer edge which is suitable for the second spigot through hole 211 is integrally formed on the outer side of the bottom of the lower model 22 so as to be matched with the universal upper template 11 and the universal lower template 21, so that the development period and the cost of the mold are reduced, and the flexibility of the use and the production organization of the mold is enhanced.
Further, as shown in fig. 1, 2, 7 and 9, an upper mold sinking assembly surface 112 is arranged on the parting surface 114 of the upper mold plate at the periphery of the first spigot through hole 111, and the bottom of the upper mold 12 is matched with the upper mold sinking assembly surface 112; a lower model sinking assembly surface 212 is arranged on the parting surface 214 of the lower template at the periphery of the second spigot through hole 211, and the bottom of the lower model 22 is matched with the lower model sinking assembly surface 212. The adaptation means that the outer edge of the bottom of the upper model 12 is consistent with the shape and size of the upper model sinking assembly surface 122, and can be just installed on the upper model sinking assembly surface 122 in a matching manner; the outer edge of the bottom of the lower model 22 is consistent with the shape and the size of the sinking assembly surface 212 of the lower model, and can be just matched and installed on the sinking assembly surface 212 of the lower model. By arranging the sinking assembly surface, the upper and lower moulds 22 are assembled with the upper and lower moulds 21 without redundant extending parts on the parting surfaces of the moulds, thereby ensuring the smoothness of the parting surfaces of the moulds, and directly generating the brake drum molding cavity 10 in the sand box without redundant edge parts needing to be cleaned.
Further, as shown in fig. 1-2 and 7-10, the bottom of the upper mold 12 is provided with a first flange 121, and the first flange 121 is matched with the upper mold sinking-assembling surface 112 and detachably connected with the upper mold plate 11; the bottom of the lower model 22 is provided with a second flange 221, and the second flange 221 is matched with the lower model sinking assembly surface 212 and detachably connected with the lower template 21. Specifically, the first flange 121 and the second flange 221 may be flange structures integrally formed on the upper mold 12 and the lower mold 22 when the upper mold 12 and the lower mold 22 are manufactured, six bolts may be uniformly distributed on the first flange 121 and the second flange 221 to be connected with the upper mold 11 and the lower mold 21, and the upper mold 12 and the lower mold 22 are fixed on the upper mold 11 and the lower mold 21 through the flange structures, so that the connection is more stable, and the shape of the flange and the shape of the mold are both circular, thereby saving mold manufacturing materials. Under the mating reaction of flange structure and model sinking fitting surface, the mould that this scheme provided can reach the intensity and the casting effect of integration block casting in the past with the mode of can dismantling the connection to form standard pouring cavity and pour out standard brake drum in the molding sand, solved and longed the mould that solves but not solved all the time at brake drum casting process and made the difficult problem of cycle length and mould part damage all the time.
Further, as shown in fig. 1, 2, 7 and 9, the template and the mold may be assembled and molded by two types of one template, that is, two sets of molds are provided, the mold further includes a second upper mold 13 and a second lower mold 23, the upper mold 12 and the lower mold 22 are a first set of mold, the second upper mold 13 and the second lower mold 23 are a second set of mold, a third spigot through hole 113 is provided on the parting surface 114 of the upper template, a fourth spigot through hole 213 is provided on the parting surface 214 of the lower template, the third spigot through hole 113 is juxtaposed to the first spigot through hole 111, and the fourth spigot through hole 213 is juxtaposed to the second spigot through hole 211; the connection mode of the second upper model 13 between the upper template 11 and the third seam allowance through hole 113 is the same as the connection mode of the upper model 12 between the upper template 11 and the first seam allowance through hole 111; the connection mode of the second lower model 23 at the lower template 21 and the fourth seam allowance through hole 213 is the same as the connection mode of the lower model 22 at the lower template 21 and the second seam allowance through hole 211. Specifically, the connection mode of the second upper model 13 between the upper template 11 and the third spigot through hole 113 is the same as the connection mode of the upper model 12 between the upper template 11 and the first spigot through hole 111, that is, the bottom of the second upper model 13 is detachably connected with the parting surface 114 of the upper template at the third spigot through hole 113; the connection mode of the second lower die 23 between the lower die 21 and the fourth seam allowance through hole 213 is the same as the connection mode of the lower die 22 between the lower die 21 and the second seam allowance through hole 211, that is, the top of the second lower die 23 passes through the fourth seam allowance through hole 213 from the parting surface 214 of the lower die, and the outer edge formed on the outer side of the bottom of the second lower die 23 is detachably connected with the parting surface 214 of the lower die. Similarly, the upper plate 11 and the lower plate 21 are designed as standard parts and are implemented according to standardization, and the sizes of the third spigot through hole 113 and the fourth spigot through hole 213 can also be fixed values, so that the upper plate and the lower plate have universality after being manufactured; the second upper model 13 and the second lower model 23 can be designed and manufactured and combined according to brake drum products of different models, and are detachably connected with the upper template 11 and the lower template 21 in the same connection mode as the first group of models, and the connection mode comprises a sinking assembly surface and a flange structure, so that the development period and the cost of the mold are reduced, and the flexibility of the use and production organization of the mold is enhanced.
Furthermore, the models of the second upper model 13 and the second lower model 23 can be the same as the models of the upper model 12 and the lower model 22, namely two brake drums can be simultaneously poured on the same template through two groups of models with the same model, so that the space utilization rate of the mould and the production and processing efficiency are improved; the models of the second upper model 13 and the second lower model 23 and the models of the upper model 12 and the lower model 22 can be different, namely two brake drums with different models can be simultaneously poured out on the same template through two groups of models with different models, and the flexibility of using and producing organization of the mold is enhanced.
Further, as shown in fig. 1 to 3, the upper gating system forming mold 31 includes a vertically arranged sprue forming mold 311 and a runner forming mold 312 provided at the bottom of the sprue forming mold 311, the runner forming mold 312 is provided with at least one riser forming mold 313 for feeding, the bottom side of the riser forming mold 313 is provided with at least one riser neck forming mold 3131, the sprue forming mold 311 and the runner forming mold 312 are detachably mounted on the upper mold plate parting surface 114 in the actual forming orientation and connected to the upper mold 12 through the riser neck forming mold 3131; the lower gating system forming mold 32 includes a sprue base forming mold 321, and the sprue base forming mold 321 is detachably mounted to the lower mold plate parting surface 214 in an actual forming orientation corresponding to the positions of the sprue forming mold 311 and the runner forming mold 312. In other embodiments, the lower gating system forming mold 32 further includes a riser forming mold (not shown) which is a part of the lower portion of the riser forming mold 313 and is detachably mounted on the lower mold plate parting surface 214 corresponding to the riser forming mold 313 in the actual forming orientation, so as to increase the riser modulus, delay the riser solidification time and improve the feeding effect. The sprue forming die 311, the sprue seat forming die 321, the cross runner forming die 312 and the riser die forming die can be independently detached and assembled, and the problem that the whole pouring system forming die 3 is scrapped due to the fact that the service lives of all the parts are asynchronous is solved.
Specifically, as shown in fig. 3, the gating system forming mold 3 mainly includes a sprue forming mold 311, a sprue seat forming mold 321, a runner forming mold 312, a riser forming mold 313 provided on the runner forming mold 312, and a riser neck forming mold 3131 provided on the bottom side of the riser forming mold 313, which are connected in this order, and the gating system forming mold 3 is formed in an actual forming orientation as shown in fig. 3, and a gating system 30 passage as shown in fig. 6 is formed in a flask to pour the forming cavity 10. After the gating system forming die 3 is formed according to the actual forming direction, the upper gating system forming die 31 is arranged on the parting surface 114 of the upper shaping plate corresponding to the actual forming direction in space, and an upper positioning hole 115 for contraposition installation of the sprue forming die 311 can be arranged on the parting surface 114 of the upper shaping plate; the lower casting system forming die 32 is spatially installed on the lower template parting surface 214 corresponding to the actual forming orientation, a lower positioning hole 215 can be formed on the lower template parting surface 214, the positions of the lower positioning hole 215 and the upper positioning hole 214 are consistent, the lower positioning hole is used for installing the straight sprue seat forming die 321 in an aligned mode, and after the upper die 1 and the lower die 2 are formed in the sand box, a channel of the casting system 30 shown in fig. 6 can be formed in the sand box, and the forming cavity 10 is cast.
Further, as shown in fig. 4 and 5, when only one set of the molds is provided, the runner molding die 312 is provided on one side of the mold; when two sets of molds are provided, the runner molding die 312 is provided between the two sets of molds, and the runner 303 shown in fig. 5 and 6 is formed after filling sand in the molding box and molding, and the sequential solidification principle is adopted to simultaneously pour into the molding cavity 10 and the second molding cavity 20 by means of intermediate liquid injection.
Further, as shown in fig. 4 and 6, it is preferable that the feeder forming molds 313 are two for feeding and adjusting the temperature distribution field of the mold; when only one group of models is arranged, the two dead head forming molds 313 are uniformly distributed on one side of the group of models; when two sets of molds are provided, two riser molding dies 313 are disposed between the two sets of molds, and each riser molding die 313 is provided with two riser neck molding dies 3131 connected to the two sets of molds, respectively, so that two risers 304 and four riser necks 305 as shown in fig. 5 and 6 are formed after sand filling molding in the molding box, and liquid is simultaneously injected into the molding cavity 10 and the second molding cavity 20.
Further, as shown in fig. 1 and 8, a plurality of exhaust columns, preferably 5, are provided at the top of the upper mold 12, a central exhaust column 122 with a diameter of 30-60mm is provided at the middle position of the top of the upper mold 12, and another 4 exhaust columns 123 with a diameter of 12-25mm are provided around the central exhaust column 122, so that a central exhaust hole 401 and an edge exhaust hole 402 as shown in fig. 6 are formed after the sand mold is filled in the sand box for dispersing the exhaust amount and further reducing the blow hole defect of the casting. Of course, when there is a second set of models, a plurality of exhaust columns may be disposed on the top of the second set of models, i.e. the second upper model 13, and a plurality of exhaust columns disposed on the second upper model 13 should also fall within the protection scope of the present invention.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A mould for casting a brake drum by a static pressure line high-pressure molding process is characterized by comprising the following components:
the upper die comprises an upper template and an upper model, and the upper model is detachably connected with the upper template;
the lower die comprises a lower template and a lower die model, and the lower die model is detachably connected with the lower template;
the gating system forming die comprises an upper gating system forming die and a lower gating system forming die, wherein the upper gating system forming die is installed on the upper template in an assembling mode, the lower gating system forming die is installed on the lower template in an assembling mode, and the upper gating system forming die is connected with the upper template.
2. The mold for casting the brake drum through the static pressure line high-pressure molding process as claimed in claim 1, wherein a first spigot through hole is formed in the parting surface of the upper template, and the bottom of the upper model is detachably connected with the upper template at the first spigot through hole; a second spigot through hole is formed in the parting surface of the lower template, and the lower template penetrates through the second spigot through hole to be detachably connected with the lower template.
3. The mold for casting the brake drum through the static pressure line high-pressure molding process as claimed in claim 2, wherein an upper mold sinking assembly surface is arranged on the periphery of the first spigot through hole of the parting surface of the upper template, and the bottom of the upper mold is matched with the upper mold sinking assembly surface; and a lower model sinking assembly surface is arranged on the periphery of the second spigot through hole of the parting surface of the lower template, and the bottom of the lower model is matched with the lower model sinking assembly surface.
4. The mold for casting the brake drum through the static pressure line high-pressure molding process as claimed in claim 3, wherein the bottom of the upper mold is provided with a first flange, and the first flange is matched with the sinking assembly surface of the upper mold and is detachably connected with the upper shaping plate; and the bottom of the lower model is provided with a second flange, and the lower model is sunk into the assembly surface to be matched with the lower model through the second flange and is detachably connected with the lower template.
5. The mold for casting the brake drum through the static pressure line high-pressure molding process as claimed in claim 2, further comprising a second upper mold and a second lower mold, wherein a third spigot through hole is formed in a parting surface of the upper mold, a fourth spigot through hole is formed in a parting surface of the lower mold, and the third spigot through hole and the fourth spigot through hole are respectively parallel to the first spigot through hole and the second spigot through hole; the connection mode of the second upper model on the upper template and the third seam allowance through hole is the same as that of the upper model on the upper template and the first seam allowance through hole; the connection mode of the second lower model between the lower template and the fourth seam allowance through hole is the same as that of the lower model between the lower template and the second seam allowance through hole.
6. The mold for casting a brake drum according to claim 5, wherein the second upper mold and the second lower mold are the same or different in type from the upper mold and the lower mold.
7. The mold for casting the brake drum according to any one of claims 2 to 6, wherein the upper casting system forming mold comprises a vertically arranged sprue forming mold and a runner forming mold arranged at the bottom of the sprue forming mold, the runner forming mold is provided with at least one riser forming mold, the riser forming mold is provided with at least one riser neck forming mold, and the sprue forming mold and the runner forming mold are detachably mounted on the parting surface of the upper mold plate according to the actual forming orientation and connected with the upper mold through the riser neck forming mold; the lower pouring system forming die comprises a sprue seat forming die, wherein the sprue seat forming die is detachably mounted on the parting surface of the lower template according to the actual forming direction and corresponds to the sprue forming die and the cross runner forming die in positions.
8. The mold for casting a brake drum according to claim 7, wherein when only one set of the mold is provided, the runner molding die is provided on one side of the mold; when two groups of models are arranged, the cross gate forming die is arranged between the two groups of models.
9. The mold for casting a brake drum according to claim 8, wherein the number of the riser forming molds is two; when only one group of models is arranged, the two riser forming molds are uniformly distributed on one side of the group of models; when two groups of models are arranged, the two riser forming dies are uniformly distributed between the two groups of models, and each riser forming die is provided with two riser neck forming dies which are respectively connected with the two groups of models.
10. The mold for casting the brake drum by the static pressure line high-pressure molding process as claimed in any one of claims 2 to 6, wherein a plurality of exhaust columns are arranged at the top of the upper mold for cavity exhaust and reduction of casting blow hole defects; when two sets of models are provided, a plurality of exhaust columns are also provided on the top of the second upper model.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010656798.0A CN111604468A (en) | 2020-07-09 | 2020-07-09 | Mould for casting brake drum by static pressure line high-pressure molding process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010656798.0A CN111604468A (en) | 2020-07-09 | 2020-07-09 | Mould for casting brake drum by static pressure line high-pressure molding process |
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| CN111604468A true CN111604468A (en) | 2020-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010656798.0A Pending CN111604468A (en) | 2020-07-09 | 2020-07-09 | Mould for casting brake drum by static pressure line high-pressure molding process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111940676A (en) * | 2020-09-11 | 2020-11-17 | 湖北丹江口志成铸造股份有限公司 | Sand casting mixes cloth mould |
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