CN204308164U - Top cover die casting - Google Patents

Abstract

The utility model discloses a kind of top cover die casting, comprise cover half and dynamic model, be formed between cover half and dynamic model for shaping top cover molding cavity and be communicated in molding cavity and for metal liquid enter molding cavity enter to water runner, molding cavity has and to be positioned on the downside of molding cavity and for the cavity that has a down dip of the inclination thin-walled on the downside of shaping top cover, enter to water flow passage in the bottom of the cavity that has a down dip, enter to water runner to tilt towards the same side with the cavity that has a down dip, and enter to water runner the water conservancy diversion direction of metal liquid and the angle of cavity to the water conservancy diversion direction of metal liquid that have a down dip are more than or equal to 0 ° and are less than 90 °, thus metal liquid from enter to water runner inject have a down dip cavity time, reduce the impact pressure of the chamber wall of metal liquid and the cavity that has a down dip, metal liquid can not be spread out, thus avoid metal liquid to cool too early at casting process, and eliminate sand hole, cold line, the defect such as cold shut and poor surface smoothness.

Description

Die-casting mold for top cover

technical field

The utility model relates to the field of die casting, in particular to a die casting mold for a top cover.

Background technique

Die casting, the full name of pressure casting, refers to the casting method of filling the mold cavity with liquid metal under high pressure and high speed conditions, and cooling and forming under high pressure to form the required products. It is the most widely used and fastest developing in the casting process. One of the metal hot forming process methods. As a component forming technology, die-casting adapts to the requirements of product complexity, precision, light weight, energy saving and greening in modern manufacturing industry, and its application fields are constantly expanding. With the continuous improvement of die-casting equipment and process technology, the application range of die-casting products will continue to expand on the existing basis.

As we all know, a reasonable gating structure plays an important role in ensuring the quality of castings. The gating structure is closely related to the filling of liquid metal and the discharge of gas in the cavity, and can fully affect the filling speed, filling time, and cavity temperature. Type conditions play a regulating role.

When die-casting castings with inclined and thin walls such as the top cover of a camera, due to the particularity of its structure, when the existing mold is used for die-casting, the pouring structure of the existing mold is auxiliary and unreasonable, resulting in the liquid metal being easily poured during the pouring process. Premature cooling, as well as defects such as sand holes, cold lines, cold shuts and poor surface finish, seriously affect the die-casting quality of castings, resulting in unqualified castings and failure to meet customer requirements for products, resulting in a low die-casting pass rate of castings , resulting in an increase in energy consumption and cost in the actual production of the enterprise, which has become a bottleneck hindering the development of the enterprise.

Therefore, there is an urgent need for a die-casting mold for the top cover to overcome the above-mentioned problems.

Utility model content

The purpose of this utility model is to provide a die-casting mold for a top cover. The pouring structure of the die-casting mold for a top cover is simple and reasonable, which can avoid premature cooling of the metal liquid during the pouring process, and eliminate sand holes, cold lines, cold shuts and surface defects. Defects such as poor finish can better guarantee the quality of die casting.

In order to achieve the above purpose, the utility model provides a die-casting mold for a top cover, which is suitable for die-casting a top cover with an inclined thin wall. The die-casting mold for a top cover includes a fixed mold and a movable mold, wherein the fixed mold and A molding cavity for molding the top cover and an inlet runner connected to the molding cavity and allowing metal liquid to enter the molding cavity are formed between the movable molds. The lower side of the forming cavity is used to form the inclined thin-walled downward inclined cavity on the lower side of the top cover, the inlet runner is connected to the bottom of the downward inclined cavity, and the inlet runner is connected to the lower inclined cavity. The downwardly inclined cavity is inclined towards the same side, and the included angle between the direction of flow of the inlet runner to the liquid metal and the direction of flow of the downwardly inclined cavity to the liquid metal is greater than or equal to 0°, and less than 90°.

Preferably, the flow guide direction of the inlet runner to the metal liquid and the flow guide direction of the downward inclined channel to the metal liquid are both intersected with the mold opening direction of the movable mold.

Preferably, the included angle between the guide direction of the pouring runner to the liquid metal and the direction of flow guide of the downwardly inclined channel to the liquid metal is greater than or equal to 0° and less than or equal to 45°.

Preferably, the included angle between the guide direction of the inlet runner to the metal liquid and the direction of the flow guide of the downward inclined channel to the metal liquid is greater than or equal to 0° and less than or equal to 35°.

Preferably, the included angle between the guide direction of the inlet runner to the liquid metal and the direction of flow guide of the downwardly inclined channel to the liquid metal is equal to 5° or 22°.

Preferably, the sprue channel gradually narrows along the direction of guiding the liquid metal.

Preferably, the die-casting mold for the top cover further includes a splitter cone, the splitter cone is arranged on the movable mold and communicated with the pouring runner.

Preferably, a sprue and a runner communicating with each other are formed between the fixed mold and the movable mold. The mold opening direction of the movable mold, and the inlet runner, runner, sprue, and splitter cone are arranged in sequence in the vertical downward direction, and the end of the sprue away from the runner is connected In the splitter cone, the end of the runner away from the main runner is connected to the inlet runner.

Preferably, the runner is fan-shaped.

Preferably, the molding cavity has an upper inclined cavity located on the upper side of the molding cavity and used to form an inclined thin wall on the upper side of the top cover, and there is a gap between the fixed mold and the movable mold. An overflow, an overflow groove and an exhaust groove are formed, one end of the exhaust groove communicates with the outside atmosphere, the other end of the exhaust groove communicates with the overflow groove, and the overflow communicates with the Between the overflow tank and the top of the upper inclined channel.

Compared with the prior art, since the die-casting mold for the top cover of the utility model is formed between the fixed mold and the movable mold, a molding cavity for molding the top cover and an inlet connected to the molding cavity and allowing the metal liquid to enter the molding cavity are formed. The runner, the forming cavity has a downwardly inclined cavity located on the lower side of the forming cavity and is used to form an inclined thin wall on the lower side of the top cover. The inlet runner is connected to the bottom of the downwardly inclined cavity. The inclined cavity is inclined towards the same side, and the included angle between the flow direction of the inlet runner to the metal liquid and the flow direction of the downward inclined cavity to the metal liquid is greater than or equal to 0° and less than 90°, so that the top of the utility model The pouring structure of the die-casting mold for the cover is simple and reasonable, so that when the metal liquid is poured into the downward inclined cavity from the inlet runner, the collision pressure between the metal liquid and the cavity wall of the downward inclined cavity is reduced, so that the metal liquid will not disperse , so that the metal liquid can be injected into the lower inclined cavity from the inlet runner more smoothly and quickly, and the speed of injecting the metal liquid into the molding cavity is greatly accelerated, and it is more convenient to exhaust the molding cavity, thereby avoiding the metal liquid from pouring The process is cooled prematurely, and defects such as sand holes, cold lines, cold shuts, and poor surface finish are eliminated, which better guarantees the quality of die-casting, improves the pass rate of top cover die-casting, and can better meet customer requirements. It reduces the energy consumption and input cost in the actual production of the enterprise.

Description of drawings

Fig. 1 is a combined perspective schematic view of a die-casting mold for a top cover of the present invention in a mold clamping state.

Fig. 2 is a three-dimensional schematic view of the die-casting mold for the top cover of the present invention in a mold-opening state.

FIG. 3 is a schematic diagram of FIG. 2 at another viewing angle.

Fig. 4 is a front view of the die-casting mold for the top cover of the present invention in a mold clamping state.

Fig. 5 is a sectional view along line A-A in Fig. 4 .

Fig. 6 is a full sectional view of the die-casting mold for the top cover of the present invention in a mold clamping state.

FIG. 7 is an enlarged view of part D in FIG. 6 .

Detailed ways

In order to describe the technical content and structural features of the present utility model in detail, further description will be made below in conjunction with the embodiments and accompanying drawings.

Please refer to Fig. 1 to Fig. 7, the die-casting mold 100 for top cover of the present utility model is suitable for die-casting the top cover 200 that has inclined thin wall 201, in this embodiment, top cover 200 is preferably camera top cover, but does not use This is the limit. Wherein, the die-casting mold 100 for the top cover of the present utility model includes a fixed mold 10 and a movable mold 20, and a molding cavity 40 for molding the top cover 200 is formed between the fixed mold 10 and the movable mold 20 and is connected to the molding cavity 40 and The pouring runner 50 for the metal liquid to enter the molding cavity 40, the molding cavity 40 has a downward inclined cavity 41 located on the lower side of the molding cavity 40 and used to form the inclined thin wall 201 on the lower side of the top cover 200, and the pouring flow The channel 50 is connected to the bottom of the downwardly inclined cavity 41, and the inlet runner 50 and the downwardly inclined cavity 41 are inclined towards the same side, and the direction of flow of the metal liquid by the inlet runner 50 (arrow E in FIG. direction) and the angle between the flow guide direction (direction indicated by the arrow F in Fig. 7) and the downward inclined cavity 41 to the metal liquid is greater than or equal to 0° and less than 90°, so that the die-casting mold 100 for the top cover of the present utility model The pouring structure is simple and reasonable, so that when the metal liquid is poured into the downward inclined cavity 41 from the pouring runner 50, the collision pressure between the metal liquid and the cavity wall of the downward inclined cavity 41 is reduced, so that the metal liquid will not be dispersed and the The metal liquid can be injected into the lower inclined cavity 41 from the inlet runner 50 more smoothly and quickly, and the speed at which the metal liquid is injected into the molding cavity 40 is greatly accelerated, and the exhaust of the molding cavity 40 is more convenient, thereby avoiding the leakage of the metal liquid Premature cooling during the casting process eliminates defects such as sand holes, cold lines, cold shuts, and poor surface finish, which better guarantees the quality of die casting. Specifically, as follows:

Wherein, the guide direction of the metal liquid by the inlet runner 50 and the guide direction of the metal liquid by the downward inclined cavity 41 are both intersected with the mold opening direction of the movable mold 20, so as to adapt to the molding of the inclined thin wall 201 of the top cover 200 The structure is more reasonable and compact. Specifically, in this embodiment, the mold opening direction of the movable mold 20 is along the horizontal direction, which is the direction indicated by the arrow B in FIG. 5 and FIG. 6 . It should be noted that, in this embodiment, the movable mold 20 , the fixed mold 10 and the top cover 200 are arranged along the vertical direction, which is the direction indicated by the arrow C in FIG. 5 and FIG. 6 .

Optionally, the included angle between the guide direction of the metal liquid from the inlet runner 50 and the guide direction of the metal liquid from the downward inclined cavity 41 is greater than or equal to 0° and less than or equal to 45°, so that the metal liquid flows from the inlet When the runner 50 is injected into the downwardly inclined cavity 41, the collision pressure between the metal liquid and the wall of the downwardly inclined cavity 41 is further reduced, so that the metal liquid will not disperse, and the structure is more reasonable. Further, the included angle between the flow guide direction of the metal liquid from the inlet runner 50 and the flow guide direction of the metal liquid from the downward inclined channel 41 is greater than or equal to 0° and less than or equal to 35°, so that when the metal liquid flows from the inlet runner When 50 is injected into the downwardly inclined cavity 41, the collision pressure between the liquid metal and the cavity wall of the downwardly inclined cavity 41 is further reduced, so that the metallic liquid will not disperse and the structure is more reasonable. Specifically, in this embodiment, the included angle between the guide direction of the metal liquid by the inlet runner 50 and the guide direction of the metal liquid by the downwardly inclined channel 41 is preferably equal to 22°, so as to better meet the requirements. The structure of the molded top cover 200 is, of course, not limited thereto. In other embodiments, the flow guide direction of the inlet runner 50 to the metal liquid and the downwardly inclined cavity 41 are flexibly selected according to the actual processing requirements. The included angle of the diversion direction of the metal liquid, for example, can be selected as 5°, 10° or 20°, which will not be repeated here.

Preferably, in this embodiment, the inlet runner 50 gradually shrinks along the direction of guiding the liquid metal to further accelerate the speed at which the liquid metal is injected into the molding cavity 40, and after the top cover 200 is die-casted, the finished product The top cover 200 is easier to separate from the material handle 202 formed in the pouring runner 50, and the structure is more reasonable.

Moreover, the die-casting mold 100 for the top cover further includes a splitter cone 30 , and the splitter cone 30 is disposed on the movable mold 20 and communicated with the inlet runner 50 . Specifically, in this embodiment, the fixed mold 10 and the movable mold 20 are also formed with a sprue 60 and a runner 70 communicating with each other, and the direction of the flow of the metal liquid by the sprue 60 and the runner 70 is staggered. In the mold opening direction of the movable mold 20, and the pouring runner 50, the runner 70, the main runner 60 and the splitter cone 30 are in the vertical downward direction (the direction indicated by the arrow C in Fig. 5 and Fig. 6 ) in sequence Arrangement, the end of the sprue 60 away from the runner 70 is connected to the splitter cone 30, and the end of the runner 70 away from the runner 60 is connected to the inlet runner 50, the structure is more reasonable. Preferably, in this embodiment, the runner 70 is fan-shaped, so that the runner 70 can adapt to the connection with the inlet runner 50, and the structure is more reasonable and simple. Moreover, in this embodiment, the handle 202 connected to the inclined thin wall 201 on the lower side of the top cover 200 is partly formed on the inlet runner 50 , and partly formed on the runner 70 and the sprue 60 .

Furthermore, in this embodiment, the molding cavity 40 has an upper inclined channel 42 located on the upper side of the molding cavity 40 and used for molding the inclined thin wall 201 on the upper side of the top cover 200, and the fixed mold 10 and the movable mold 20 An overflow 81, an overflow groove 82 and an exhaust groove 83 are also formed between them. One end of the exhaust groove 83 is connected to the outside atmosphere, the other end of the exhaust groove 83 is connected to the overflow groove 82, and the overflow 81 is connected to the overflow. Between the flow groove 82 and the top of the upwardly inclined channel 42, the gas in the molding cavity 40 can be discharged more smoothly and quickly, and the structure is more reasonable. Preferably, in this implementation, the exhaust groove 83 is located above the overflow groove 82, and the overflow 81 is located below the overflow groove 82, so that the structure is more reasonable and the exhaust is more convenient. Specifically, in this embodiment, seven overflow grooves 82 are distributed on the top of the upper inclined cavity 42, and each overflow groove 82 is connected with an overflow 81 and an exhaust groove 83 correspondingly, and the seven A plurality of overflow grooves 82 are evenly distributed along the circumferential direction of the forming cavity 40, so that the exhaust structure of the forming cavity 40 is more reasonable and compact; however, the utility model does not specifically address the overflow port 81, the overflow groove 82 and the exhaust. The number of settings is limited, which can be flexibly selected according to actual processing requirements, and will not be repeated here.

In conjunction with the accompanying drawings, the process of die-casting the roof 200 with the die-casting mold 100 for the roof of the present invention will be described in detail: first, the metal liquid is injected into the splitter cone 30 through injection, then enters the runner 70 through the main channel 60, and then The pouring channel 50 is poured into the downwardly inclined cavity 41 of the molding cavity 40 along the direction indicated by the arrow E in FIG. The cavity 42, that is, the direction in which the metal liquid fills the molding cavity 40 is to rapidly rise and fill in the vertical upward direction (the detailed direction indicated by the arrow C in Fig. 5 and Fig. 6); and, as the metal liquid pours into The forming cavity 40, the gas in the forming cavity 40 is also squeezed and discharged to the outside atmosphere through the overflow port 81, the overflow groove 82 and the exhaust groove 83 in sequence, and finally the metal liquid is filled with the forming cavity 40, thereby completing the top. Die-cast molding of the cover 200 .

Compared with the prior art, since the die-casting mold 100 for the top cover of the present invention is formed between the fixed mold 10 and the movable mold 20, a molding cavity 40 for molding the top cover 200 is formed and is communicated with the molding cavity 40 and supplies liquid metal. Entering the pouring runner 50 of the molding cavity 40, the molding cavity 40 has a downwardly inclined cavity 41 located on the lower side of the molding cavity 40 and used for forming the inclined thin wall 201 on the lower side of the top cover 200, and the pouring runner 50 communicates with At the bottom of the downwardly inclined channel 41, the inlet runner 50 and the downwardly inclined channel 41 are inclined towards the same side, and the direction of the flow of the metal liquid by the inlet runner 50 is the same as that of the downwardly inclined channel 41 for the metal liquid. The included angle of the direction is greater than or equal to 0° and less than 90°, so that the pouring structure of the die-casting mold 100 for the top cover of the present invention is simple and reasonable, thereby reducing the The collision pressure between the metal liquid and the cavity wall of the downwardly inclined cavity 41 prevents the metal liquid from being dispersed, so that the metal liquid can be injected into the downwardly inclined cavity 41 from the inlet runner 50 more smoothly and quickly, and the process is greatly accelerated. The speed at which the metal liquid is injected into the molding cavity 40 is more convenient for the exhaust of the molding cavity 40, thereby avoiding the premature cooling of the metal liquid during the pouring process, and eliminating defects such as sand holes, cold lines, cold shuts, and poor surface finish. The die-casting quality is better guaranteed, the qualified rate of the top cover 200 die-casting is improved, and the requirements of customers can be better met, and the energy consumption and input cost in the actual production of the enterprise are reduced.

The above disclosures are only preferred embodiments of the present utility model, and of course the scope of rights of the present utility model cannot be limited by this, so equivalent changes made according to the claims of the present utility model still belong to the scope covered by the present utility model .

Claims (10)

1. a top cover die casting, be applicable to the top cover that die casting has inclination thin-walled, described top cover die casting comprises cover half and dynamic model, it is characterized in that, be formed between described cover half and described dynamic model for shaping described top cover molding cavity and be communicated in described molding cavity and for metal liquid enter described molding cavity enter to water runner, described molding cavity has and to be positioned on the downside of described molding cavity and for the cavity that has a down dip of the inclination thin-walled on the downside of shaping described top cover, describedly enter to water flow passage in the bottom of the described cavity that has a down dip, describedly enter to water runner and the described cavity that has a down dip tilts towards the same side, and described in enter to water runner the water conservancy diversion direction of described metal liquid and the described angle of cavity to the water conservancy diversion direction of described metal liquid that have a down dip be more than or equal to 0 ° and be less than 90 °.

2. top cover die casting as claimed in claim 1, is characterized in that, described in enter to water runner all crisscrosses described dynamic model die sinking direction to the water conservancy diversion direction of described metal liquid and the described water conservancy diversion direction of cavity to described metal liquid that have a down dip.

3. top cover die casting as claimed in claim 1, is characterized in that, described in enter to water runner the water conservancy diversion direction of described metal liquid and the described angle of cavity to the water conservancy diversion direction of described metal liquid that have a down dip be more than or equal to 0 ° and be less than or equal to 45 °.

4. top cover die casting as claimed in claim 3, is characterized in that, described in enter to water runner the water conservancy diversion direction of described metal liquid and the described angle of cavity to the water conservancy diversion direction of described metal liquid that have a down dip be more than or equal to 0 ° and be less than or equal to 35 °.

5. top cover die casting as claimed in claim 4, is characterized in that, described in enter to water runner 5 ° or 22 ° equaled to the water conservancy diversion direction of described metal liquid and the described angle of cavity to the water conservancy diversion direction of described metal liquid that have a down dip.

6. top cover die casting as claimed in claim 1, is characterized in that, described in enter to water runner along reducing gradually the water conservancy diversion direction of described metal liquid.

7. top cover die casting as claimed in claim 1, is characterized in that, also comprise spreader, and described spreader is located at described dynamic model and is entered to water runner described in being communicated in.

8. top cover die casting as claimed in claim 7, it is characterized in that, the sprue be interconnected and cross gate is also formed between described cover half and described dynamic model, described sprue and the water conservancy diversion direction of described cross gate to described metal liquid all crisscross the die sinking direction of described dynamic model, and described in enter to water runner, cross gate, sprue and spreader and arrange successively along direction straight down, described sprue is communicated in described spreader away from one end of described cross gate, enters to water runner described in described cross gate is communicated in away from one end of described sprue.

9. top cover die casting as claimed in claim 8, it is characterized in that, described cross gate is fan-shaped.

10. top cover die casting as claimed in claim 1, it is characterized in that, described molding cavity has and to be positioned on the upside of described molding cavity and for the surface thereof cavity of the inclination thin-walled on the upside of shaping described top cover, and be also formed with overflow lip, overflow launder and air discharge duct between described cover half and described dynamic model, one end of described air discharge duct is communicated in extraneous air, the other end of described air discharge duct is communicated in described overflow launder, and described overflow lip is communicated between the top of described overflow launder and described surface thereof cavity.