JP2015120176A - Aluminum die casting apparatus and aluminum die casting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a die casting apparatus and method, capable of providing high quality die casting products and an efficient process in which multiple steps are simultaneously performed, such as the steps of inserting a plurality of heat insulating materials, pouring molten metal into the plurality of heat insulators, die clamping, evacuating, taking out, air blowing, applying a die release agent, and applying a lubricant to a plurality of sleeves.SOLUTION: A die casting method includes: an inserting/adhering step of, when opening a die, inserting a plurality of thin heat insulating materials in respective inner walls of a plurality of injection sleeves between an upper die and a lower die and closely adhering the heat insulating materials to the inner walls; a step of pouring molten metal in the plurality of thin heat insulating materials inserted in the plurality of injection sleeves, after the inserting/adhering step; a step of clamping the die; a step of evacuating inside the die; a step of injecting the molten metal inserted in the plurality of injection sleeves; a step of solidifying the metal and thereafter opening the die; a step of taking out a die casting product; and a step of performing air cleaning, spraying of a die release agent and spraying of a lubricant.

Description

The present invention relates to an aluminum die casting production technique. More particularly, the present invention relates to a method that enables high quality (no casting defects), thin-walled, large integrated aluminum die castings.

In the conventional aluminum die casting method, for example, when producing a product (for example, a suspension member for an automobile) having a thickness of about 3 mm × 500 mm width × 1000 mm length, a vacuum die casting method is performed. High-speed and high-pressure injection plungers, runners for supplying molten metal evenly, gates, product cavities, decompression runners for vacuum suction, vacuum valves, etc. are placed in a large mold, and "Clamping"-"Injection" -Requires complex and large molds and die casting machines (eg 3000 ton clamping machines, injection speeds of 3 m / s or more) to perform "extrusion". In order to produce larger and thinner products (for example, 2 mm wall thickness x 1000 mm width x 1500 mm; door panels, etc.), further increase in speed and pressure, ultra-large molds, die casting machines (for example, clamping of 4000 tons) Machine), which is very difficult in practice. Further, at present, it is impossible to manufacture an ultra-large product by die casting in view of the size of the machine, the injection speed, and the like.

On the other hand, the conventional low-speed / low-pressure method (gravity casting method or low-pressure casting method) or low-speed / high pressure method (squeeze die casting) is completely impossible to produce such a thin and large product.

  In order to enable low-cost production of thin-walled and large-sized die castings, it is necessary to develop a low-pressure, low-pressure, simple and compact die casting method. The reason for the necessity of high-speed and high-pressure vacuum die casting in conventional die casting is as follows.

(A) High-speed injection so as not to solidify during filling (B) Depressurization or evacuation to prevent air entrainment in the cavity (however, there is residual air because complete vacuum is practically impossible)
(C) High pressure for compression of air entrained by high speed filling (D) High pressure pressurization to compensate for coagulation shrinkage, that is, in conventional die casting, quality cannot be ensured without high speed and high pressure, There was a limit to it.

Therefore, the present inventor made the following proposal (see Patent Document 1, Patent Document 2, Patent Document 3, and Patent Document 4).

Patent Document 1 recognizes the technical problem of an injector having the functions of vacuum, injection, pressurization, and extrusion (that is, simplification of die-casting equipment). As a result, this configuration (1) has the following advantages: (1) No temperature drop, easy control of pouring amount, easy handling, (2) Die-casting structure is simplified (I.e., less vacuum leak), (3) the effect of being able to directly place a plurality of injectors at the optimum position in the product by solidification, flow, and extrusion (i.e., a large thin wall is possible), The effect that the suction time can be taken longer, the number of leaked parts is reduced (high vacuum is possible), and the injection pressure position is directly in the product. The effect of shortening the flow distance, the prevention of hot water and shrinkage, and the need for gates and overflows are eliminated, reducing the mold size and improving the yield, reducing the flow distance, The effect of enabling low-speed and low-pressure injection due to the high degree of vacuum (that is, the mold and machine become compact) has been realized.

In Patent Document 2, (1) heat-insulating capsule, filter handling method, (2) heat-retaining coating agent, application to auxiliary runner ribs die casting (application in ultra-thin large-sized products), (3) biscuit separation A method was proposed.

In Patent Document 3, in order to perform the high-quality aluminum die casting proposed in Patent Documents 1 and 2 more efficiently, a mold in which a plurality of injections, a vacuum, a pressure, and an extrusion mechanism are integrated is easily replaced. In addition, we proposed a die-casting system that efficiently performs a series of operations such as pouring, and dramatically increases the operating rate and non-defective product rate. The contents are summarized below.

[I] Proposal of compact mold with injection / vacuum / pressurization / extrusion integrated mold and rapid die change machine (horse-shoe type platen) (1) Compact mold with all of <multi-injection servo mechanism, vacuum, extrusion mechanism>, etc. The mold was realized.
(2) By external setup, wiring piping and mold preheating became possible. As a result, discarding was eliminated and the operating rate and non-defective rate improved.
(3) The die casting machine itself has a simple structure with only a mold opening and closing mechanism (horse-shoe type platen, quick slide type change, clamping force is less than 1/10 of the conventional method, and there is no deformation of the platen) Realized.

(B) Prepare <hot water capsule + heat transfer device> in advance and supply it quickly and quietly (1) Check the amount and temperature of the hot water in the heat storage capsule, and adopt a structure to supply hot water. Realized high accuracy and stabilization of hot water and temperature.
(2) The use of a configuration that eliminates a drop during pouring and eliminates contact and cooling with the sleeve / plunger enables a clean molten metal.
(3) Rapid hot water supply has become possible by adopting a configuration in which the movement of the plunger is used to quietly and quickly supply hot water.

The inventions proposed in Patent Document 1, Patent Document 2 and Patent Document 3 enable the production of high-quality, ultra-thin and large-sized die-cast products. However, there is still a problem that the constituent elements are complicated (use of a heat insulating material, an injector with a vacuum function).

In patent document 4, the technical feature demonstrated to the following (1), (2) and (3) implement | achieved the method of producing a higher quality die-cast product.
(1) Method for preventing solidification in the sleeve without a heat insulating material In the vertical die casting method, low-speed high-pressure injection is usually used for relatively small and thick products. The invention according to Patent Document 4 has a plurality of injection cylinders in order to produce a large and thin product, eliminates the need for a heat-insulating capsule, which is inevitable in the invention of Patent Document 1 that enables low pressure, and further reduces costs. It is an invention. In the absence of a heat insulating material, if it takes a long time from pouring to injection, solidification proceeds in the sleeve, resulting in injection trouble and poor hot water.

Therefore, after completing <opening of mold, casting, cleaning, and application of release material>, the mold is kept in a semi-closed state (for example, closed about 3/4) and poured from the mold gap with a pouring jig (heat-retaining hook). I boil water. At the time of this pouring, the plunger tip is lowered in accordance with the amount of pouring, and the pouring head is minimized to prevent hot water turbulence and generation of oxidized components. After removing the pouring jig, the mold is further closed. Thereby, since the conventional mold closing stroke (for example, 600 mm) can be shortened to about 150 mm, the mold closing time can be shortened from, for example, about 15 seconds to about 4 seconds (pouring jig removal + mold closing time). Solidification of the molten metal in the injection sleeve is difficult to proceed. Furthermore, by using a heat retaining sleeve lubricant or a heat retaining sleeve in combination, the progress of solidification can be further slowed, and a so-called solidified layer (breaking chill layer) on the inner surface of the sleeve can be eliminated.
Furthermore, a plurality of injections can be easily performed as well.

(2) A simple method for quickly creating a high vacuum inside the mold cavity After pouring is completed, the mold is further lowered to open a gap (about 2 mm: a gap where the vacuum seal is effective), and its position Hold the mold for a short time. Immediately thereafter, the vacuum system is opened and the inside of the mold cavity is kept at a high vacuum. That is, a high vacuum can be easily achieved without a vacuum DC valve, a chill vent, or an injector having a vacuum function as in Patent Document 1. Further, since the mold gap is as large as about 2 mm and the suction area is wide, a high vacuum can be achieved in a very short time (for example, 1 second). After reaching high vacuum, the remaining gap is completely closed and injection is performed.

The processes (1) and (2) in Patent Document 4 can be performed in, for example, [4 + 1] seconds because of a short stroke from completion of pouring to injection, and solidification of the molten metal in the sleeve is almost a problem. As a result, a heat insulating capsule made of a heat insulating material becomes unnecessary, and a special pouring mechanism and an expensive vacuum mechanism are also unnecessary.

(3) Method of ensuring pressurization effect from biscuits When injection is performed, clean molten metal that passes through the filter is injected into the mold cavity to form biscuits. Although the solidification in the sleeve can be minimized by the above (1) and (2), the solidification progresses slightly during filling, so a solidified shell is gradually generated on the mold contact surface, and the plunger is pressurized. Stroke resistance occurs, and pressurization may not be performed sufficiently. In order to avoid the solidified shell, the tip diameter of the plunger is made smaller than that of the biscuit so that the plunger tip can enter the inside of the biscuit. As a result, the pressure of the plunger can be propagated to the product through the non-solidified part, and the coagulation contraction can be prevented at a lower pressure than in the past. In the past, high pressure was required to crush the solidified shell (having strength).

It is also an important point that enables low pressure injection by setting the position of the biscuits high so that the so-called gravity hot water is effective. By the above methods (1), (2) and (3), a special pouring mold mechanism such as the tilting sleeve method (Ube), the baculal method (vacuum suction) is used without using a special heat insulating material. Method), low pressure pouring method (MP method) and the like, and further, no vacuum valve or chill vent is required, and by holding the closing stroke of the mold in three stages, in the vertical die casting method, Large and thin products can be made easily at low speed and low pressure. Furthermore, two or more injections can be easily performed.

  The schemes of Patent Document 1, Patent Document 2, Patent Document 3 and Patent Document 4 have been briefly described above. In Patent Documents 1 to 34, a sleeve insulation capsule is used. The heat insulating materials of Patent Documents 1 to 3 hold a high-quality molten metal and are very effective in producing a high-quality die-cast product, but have a slightly complicated configuration. On the other hand, the invention of Patent Document 4 has proposed an invention in which molten metal is injected quickly without using the heat insulating material used in the inventions of Patent Documents 1 to 3.

Japanese Patent No. 4810706 Japanese Patent No. 5327605 JP 2012-148319 A JP2013-132644A

In the conventional die casting method, the number of processes is increased due to insertion of a plurality of heat insulating materials, a plurality of pouring and mold clamping, vacuum, taking out, air blowing, release agent application, and application of a plurality of sleeve lubricants, and thus a cycle. There is a problem that the time is prolonged and the merit of die casting with good productivity is lost. The problem to be solved is to solve such a problem, inserting a plurality of heat insulating materials, a plurality of pouring and mold clamping, vacuum, taking out, air blowing, applying a release agent, applying a plurality of sleeve lubricants, It is an object to provide a die casting apparatus and method capable of providing an efficient process that can be performed simultaneously and in a multi-stage manner, and a die-cast product of good quality. Moreover, by making the heat insulating material in the invention of Patent Document 1 an extremely thin film, the heat insulating effect, high quality, and simplification of the configuration are aimed at. Conventional heat insulation material is to keep the heat insulation effect and contact with the sleeve and to ensure the cleanliness of the molten metal, but also to prevent the adverse effect of the inflow of the heat insulation material fragments after injection, and to reduce the cost to reduce the cost. However, since it is broken during pouring, molding becomes difficult, and there is a limit to the thinning (thickness of 1 mm or less). An object of the present invention is to provide a method for forming a highly accurate molded body and bringing it into close contact with the inner surface of a sleeve in order to easily perform the flexible thin film molding and prevent breakage during pouring.

The inventor of the present invention filed on September 30, 2013 (Japanese Patent Application No. 2013-205708) is a highly accurate molded body in order to facilitate flexible thin film molding and prevent breakage during pouring. Proposes a method of creating and making it adhere to the inner surface of the sleeve. According to the invention of the application filed on September 30, 2013 (Japanese Patent Application No. 2013-205708), the molten metal does not contact the inner surface of the sleeve, solidification does not proceed, so-called solidified chill layer does not occur, and the plunger lubricant does not contact the molten metal. Therefore, an invention has been proposed in which no reaction gas is generated and the clean molten metal can be stably maintained at low cost. In addition, the invention of the application filed on September 30, 2013 (Japanese Patent Application No. 2013-205708) realized that the amount of the heat insulating material was small, so that the influence on the flow could be minimized, and a high quality die casting ( DC) products can be manufactured. Unlike the conventional die casting, the multi-injection method proposed in the inventions of Patent Documents 1 to 4 and the application filed on September 30, 2013 (Japanese Patent Application No. 2013-205708) produces high-quality, thin-walled and large-sized die casting products. Is possible. In other words, the solidification of the molten metal in the injection sleeve is prevented, a high vacuum is secured, a plurality of injection sleeves are installed, and the required flow distance from each sleeve is shortened. (About 1/10).

In the inventions of Patent Documents 1 to 4 and the invention of the application filed on September 30, 2013 (Japanese Patent Application No. 2013-205708), several methods that are the basis of or related to those inventions are shown. Patent Documents 1 to 3 show a system in which a plurality of molten metal heat-insulating capsules supply molten metal and perform a plurality of injections. Patent Document 4 discloses a system without a heat insulating material and an application filed on September 30, 2013. In the invention of (Japanese Patent Application No. 2013-205708), a thin film heat insulating material system is shown.

In the present invention, the thin film heat insulation shown in the invention of the application filed on September 30, 2013 (Japanese Patent Application No. 2013-205708) is not the heat retention capsule supply method of Patent Documents 1 to 4 described above or the method of eliminating the heat insulation material. It is based on the material method. This thin-film heat insulating material method has a merit that a lower-cost thin-film heat insulating material is brought into close contact with the inner wall of the injection sleeve and can prevent the temperature of the molten metal from being lowered and contaminated. However, (a) Inserting a plurality of heat insulating materials, (b) Multiple pouring, (c) Mold clamping, (d) Vacuum, (e) Taking out, (f) Air blowing, (g) Applying a release agent, (h ) There is a demerit that the number of processes increases due to the application of multiple sleeve lubricants. If these steps (a) to (h) are sequentially performed, the cycle time becomes long and the merit of die casting with good productivity is lost.

Therefore, the present inventor has (a) inserting a plurality of heat insulating materials, (b) a plurality of pouring hot water, (c) mold clamping, (d) vacuum, (e) taking out, (f) air blowing, (g) separating We have devised a method that is effective in terms of quality and cost, and an efficient process that can simultaneously apply a mold agent, (h) a plurality of sleeve lubricants, and the like. He also devised a very simple and reliable method without adopting a complicated configuration.

According to the aluminum die casting apparatus according to one aspect of the present invention (Claim 1), a movable upper mold, a fixed lower mold in which a plurality of injection sleeves are formed,
An opening and closing mechanism for opening and closing the movable top;
A mold clamping mechanism;
A device in which a heat insulating material insertion device and a molten metal ladle tilting device are integrally coupled, and are configured to be movable in a horizontal direction and a vertical direction;
Die-cast product removal and lubrication equipment
The heat insulating material insertion device includes a plurality of cylindrical devices that adsorb a plurality of heat insulating materials;
The molten ladle tilting device is provided with a plurality of molten ladles so as to be freely tiltable,
A chill vent and heat-resistant packing are interposed between the upper mold and the lower mold,
An extrusion plate driven by the opening / closing mechanism and one or a plurality of extrusion pins connected to the extrusion plate are movably provided in the space in the upper mold, and the upper mold and the lower mold are closed to press each other. When provided, the vacuum chamber is configured to communicate with the space provided with the chill vent, the extrusion plate, and the extrusion pin.

The opening / closing mechanism for opening / closing the movable upper mold is preferably an electric servo cylinder type mold opening / closing mechanism, and the mold clamping mechanism is preferably a hydraulic clamp type clamping mechanism.

Alternatively, the opening / closing mechanism for opening / closing the movable mold may be an electric servo type mold opening / closing mechanism, and the mold clamping mechanism may be a half nut type clamping mechanism.

An aluminum die casting method according to another aspect of the present invention is an aluminum die casting method using the aluminum die casting apparatus according to claim 1,
A charging / adhering step in which a plurality of thin-film heat insulating materials are inserted into the inner walls of the plurality of injection sleeves between the upper mold and the lower mold when the mold is opened;
A step of pouring molten metal into a plurality of thin film heat insulating materials charged in the plurality of injection sleeves after the charging and adhesion step;
The process of clamping,
A step of sucking and holding the inside of the mold cavity in a high vacuum, a step of injecting molten metal charged in the plurality of injection sleeves,
The process of opening the mold after solidifying the hot water,
The method includes a step of taking out a die-cast product, and a step of performing air cleaning, a release material spray, and a lubricant spray process.

An aluminum die casting method according to still another aspect of the present invention is an aluminum die casting method using the aluminum die casting apparatus according to claim 1,
(I) a step of allowing a device in which a heat insulating material insertion device and a molten ladle tilting device are integrally coupled to enter between an upper die and a lower die;
(II) A plurality of cylindrical devices adsorbing the heat insulating material are lowered into the lower mold, the heat insulating material is inserted into the injection sleeve, and the heat insulating material is brought into close contact with the inner wall of the injection sleeve. Process,
(III) a step of advancing the apparatus and pouring the molten metal from the molten ladle into the heat insulating material;
(IV) retracting the device;
(V) a process of closing the upper mold and clamping the mold,
(VI) A step of sucking and holding the inside of the mold cavity with high vacuum (VII) A step of injecting molten metal,
(VIII) a step of solidifying hot water;
(IX) a step of raising the upper mold after completion of solidification of hot water;
(X) a step of advancing the take-out / lubricating device between the upper mold and the lower mold and extruding the product from the mold;
(XI) The process of taking out the extruded product and receiving it in a lubrication device,
(XII) a step of retracting the take-out / lubrication device, and (XIII) a step of performing air cleaning, a release material spray, and a lubricant spray process.

According to the die-casting apparatus and method of the present invention, it is possible to provide a very simple configuration and thus to provide a high-quality die-cast product. Further, according to the die casting method of the present invention, (a) inserting a plurality of heat insulating materials, (b) pouring a plurality of hot water, (c) clamping a mold, (d) vacuum, (e) taking out, (f) air blowing, It is possible to provide an efficient process in which (g) application of a release agent and (h) application of a plurality of sleeve lubricants can be performed simultaneously in a multi-stage manner, and a high-quality die casting product can be provided.

It is a schematic explanatory drawing which shows an example of the die-cast apparatus which concerns on one Embodiment of this invention. It is a schematic explanatory drawing which shows an example of the die-casting apparatus which concerns on other embodiment of this invention. It is explanatory drawing which shows 1 process of the die-casting method which concerns on one Embodiment of this invention. It is explanatory drawing which shows 1 process of the die-casting method which concerns on one Embodiment of this invention. It is explanatory drawing which shows 1 process of the die-casting method which concerns on one Embodiment of this invention.

The present embodiment will be described in detail with reference to FIGS. In FIG. 1, the mold (M) is opened / closed by an electric servo cylinder (SC) as an opening / closing mechanism, and the mold (M) is tightened by a simple hydraulic clamp (internal wedge mechanism) (CL) (for example, Pascal TKB500). In the die casting apparatus and method of the present invention, the injection pressure is about 1/10 as compared with the conventional die casting, so that the clamping force can be greatly reduced. For this reason, it becomes possible to apply the said hydraulic clamp system. In a conventional die casting apparatus (2000 ton machine), it is impossible to apply such a simple hydraulic clamping method. Generally, a toggle method or the like is adopted. Since the force is possible at about 200 tons, such a simple hydraulic clamping method can be sufficiently achieved.

In FIG. 2, the opening / closing mechanism (HC) is used to open and close the mold (M) by an electric servo located on the side, and the mold (M) is fastened by a half nut type and then hydraulically driven to a half nut (HN). ). Even in this case, it is sufficient that the hydraulic clamping is about 1/10 of the conventional capacity. In the present invention, either of the methods shown in FIGS. 1 and 2 is possible, but in the present invention, since the injection pressure is very low as described above, the mold clamping force can be greatly reduced, and the equipment can be simplified. In other words, larger die-cast parts can be cast.

In the present embodiment, as shown in FIG. 3, a device (1) in which a heat insulating material insertion device (1A) and a molten ladle tilting device (1B) are integrally coupled from the right is employed. Needless to say, the present invention is not limited to the device (1) in which the heat insulating material insertion device (1A) and the molten metal ladle tilting device (1B) are integrally coupled, and the heat insulating material insertion device and the molten metal ladle. The tilting device may be a separate body, and a known device can be adopted. In either case of FIG. 1 or 2, when the upper mold (M1) is raised, for example, as shown in FIG. 3, the heat insulating material insertion device (1A) and the molten metal ladle tilting device (1B) are viewed from the right side. The integrally coupled device (1) enters between the upper mold (M1) and the lower mold (M2). In these apparatuses, the heat insulating material (C) is vacuum-adsorbed in advance outside the die casting apparatus (10), and the required amount of molten metal is filled. As long as the pouring can be performed within the casting cycle time, a pneumatic pouring machine, a ladle pouring machine, or a manual pouring may be used, but a casting cycle (for example, a total casting machine cycle is 0.5 minutes to 2 minutes). A method that does not delay the degree) is adopted. In the present embodiment, a chill vent (V) and a heat-resistant packing (SE) made of, for example, a fluorine resin are interposed between the upper mold (M1) and the lower mold (M2). Although not limited, for example, as shown in FIG. 2, an extrusion plate (PL) driven by a hydraulic or electric opening / closing mechanism (HC) and three connected to the extrusion plate (PL) A plurality of push pins (PP) (which may be one, two, or four or more) may be movably provided in the space in the upper mold (M1). When the upper mold (M1) and the lower mold (M2) are closed and pressed together, a space provided with the chill vent (V), the push plate (PL), and the push pin (PP) is provided. A communicating vacuum chamber (VC) is constructed.

<Example of cycle>
Step (I): The heat insulating material insertion device (1A) and the device (1) in which the molten metal ladle tilting device (1B) is integrally coupled are inserted between the upper die (M1) and the lower die (M2).

Process (II): (The heat insulating material (C) is charged in the lower mold (M2))
First, the three cylindrical devices (A) on which the heat insulating material (C) is adsorbed are lowered and inserted into the injection sleeve (SL). Next, the cylindrical heat insulating material holding cylinder stops the vacuum suction, and conversely pressurizes the air. By the air pressurization, the heat insulating material is brought into close contact with the inner wall of the injection sleeve (SL).

Step (III): (Device (1) is moved forward to pour hot water)
When the charging of the heat insulating material (C) into the injection sleeve (SL) is completed, the device (1) advances further. The molten metal ladle (1B) set at a position where the head is as small as possible is poured inside the heat insulating material (C) in close contact with the inner wall of the injection sleeve (SL) charged with the heat insulating material (C), A clean molten metal with almost no temperature drop is held in the injection sleeve (SL).

Step (IV): retracting the device (1)

Step (V): (close the upper mold (M1) and clamp)
In order to vacuum hold and further hold the inside of the mold (M), in the present invention, as shown in FIGS. 1 and 2, a vacuum chamber (VC) is placed on the back side of the upper mold into which the extrusion plate (PL) is inserted. ) And vacuum suction from the gap between the chill vent (V) and the push pin (PP) is performed. In conventional vacuum decompression die casting, a special vacuum valve or chill vent is installed and vacuum suction is performed. However, it is difficult to seal various gaps such as extrusion pins necessary for the mold structure, and it is difficult to seal in the injection sleeve. Because the solidification of the molten metal progresses rapidly, the vacuum suction time is very short (for example, within a few seconds), it is difficult to raise the degree of vacuum, and the capacity of the vacuum valve and chill vent has to be greatly increased. . However, in the method of the present invention, since the solidification does not proceed due to the thin film heat insulating material (C) in the injection sleeve (SL), the vacuum suction time can be made sufficiently long (for example, around 10 seconds), and the small capacity There is an advantage that a high degree of vacuum can be obtained only by vacuum suction from the gap between the chill vent (V) and the extrusion pin (PP). That is, the vacuum chamber (VC) that accommodates the extrusion plate (PL) allows the suction from the small clearance of the small-capacity chill vent (V) and the extrusion pin (PP), and the seal structure of other parts that may leak. Can easily achieve and maintain a high degree of vacuum.

Process (VI): (Injecting)
After confirming the degree of vacuum in the mold, injection from the three injection sleeves (SL) is performed. For these, a speed (for example, 0.1 m / s) and pressure (molten metal pressure of 5 to 10 MPa) of about 1/10 that of conventional die casting are sufficient. That is, it is because a clean molten metal without a temperature drop is possible by short-distance flow and pressurization from each injection sleeve (SL).

Process (VII): solidify hot water

Step (VIII): (Open upper mold (M1)) After completion of solidification, the upper mold (M1) is raised.

Step (IX): (The take-out / lubrication device (2) is advanced and the product (P) is pushed out from the mold (M1)).
The device (2) shown in FIG. 4 enters between the upper mold (M1) and the lower mold (M2), and pushes the product (P) to the product cradle.

Step (X): Receiving the extruded product (P) (XI): Retracting the take-out / lubrication device (2) (XII): (Performing air cleaning, mold release material spray and lubricant spray)
Thereafter, the apparatus is slightly retracted, the mold surface is cleaned by air blowing, and then a release agent and a plunger lubricant are applied to each injection sleeve. These operations can be performed simultaneously in a short time, and are effective in shortening the casting cycle. In addition, air blow, release agent, and lubricant application deteriorate the surrounding environment, but in this method, by installing a mold cover and a suction duct as shown in the figure, lubrication to the periphery, release agent By preventing the scatter, a clean environment can be easily maintained. That is, it is possible to cover only the periphery of the mold without covering the entire machine as in the conventional method.

After the process of step (XII), the take-out / lubrication device (2) is retracted, the process returns to step (I), and a cycle of sequentially performing the steps (I) to (XII) is repeated.

Each of these operations can be performed simultaneously, and FIG. 3 shows an example of three injection sleeves (SL). However, even if the number of injection sleeves (SL) is large (for example, (4, 5, 6, or more) or at least (2 or less). That is, the problem of the cycle delay of multi-injection has been solved. Further, the pouring ladle can be made by the method shown in FIG. 3 or the stopper ladle method shown in FIG. 4, and the head can be made smaller.

According to the die casting method of the present invention, (a) insertion of a plurality of heat insulating materials, (b) injection of a plurality of hot water, (c) mold clamping, (d) vacuum, (e) removal, (f) air blow, (g It is possible to provide an efficient process capable of simultaneously applying a release agent and (h) applying a plurality of sleeve lubricants simultaneously, and to provide a high-quality die-cast product. Moreover, according to the die-casting apparatus of the present invention, it is possible to provide a very simple configuration and thus to provide a high-quality die-cast product.

DESCRIPTION OF SYMBOLS 1 The heat insulating material insertion apparatus and the molten metal ladle tilting apparatus integrally joined 1A Thermal insulating material insertion apparatus 1B Molten metal ladle tilting apparatus 2 Takeout and lubrication apparatus C Thermal insulation material CL Hydraulic clamp HC Opening / closing mechanism M type M1 Upper mold M2 Lower mold P Die-cast product PL Extrusion plate PP Extrusion pin SE Packing V Chill vent VC Vacuum cavity

Claims (5)

A movable upper mold, a fixed lower mold formed with a plurality of injection sleeves,
An opening and closing mechanism for opening and closing the movable upper mold;
A mold clamping mechanism;
A device in which a heat insulating material insertion device and a molten metal ladle tilting device are integrally coupled, and are configured to be movable in a horizontal direction and a vertical direction;
Die-cast product removal and lubrication equipment
The heat insulating material insertion device includes a plurality of cylindrical devices that adsorb a plurality of heat insulating materials;
The molten ladle tilting device is provided with a plurality of molten ladles so as to be freely tiltable,
A chill vent and heat-resistant packing are interposed between the upper mold and the lower mold,
An extrusion plate driven by the opening / closing mechanism and one or a plurality of extrusion pins connected to the extrusion plate are movably provided in the space in the upper mold, and the upper mold and the lower mold are closed to press each other. An aluminum die-casting apparatus comprising a vacuum chamber which, when installed, communicates with the space provided with the chill vent, the extrusion plate, and the extrusion pin. 2. The aluminum die casting apparatus according to claim 1, wherein the opening / closing mechanism for opening / closing the movable upper mold is an electric servo cylinder type mold opening / closing mechanism, and the mold clamping mechanism is a hydraulic clamp type clamping mechanism. 2. The aluminum die casting apparatus according to claim 1, wherein the opening / closing mechanism for opening and closing the movable upper mold is an electric servo type mold opening / closing mechanism, and the mold clamping mechanism is a half-nut type clamping mechanism. An aluminum die casting method using the aluminum die casting apparatus according to claim 1,
A charging / adhering step in which a plurality of thin-film heat insulating materials are inserted into the inner walls of the plurality of injection sleeves between the upper mold and the lower mold when the mold is opened,
A step of pouring molten metal into a plurality of thin film heat insulating materials charged in the plurality of injection sleeves after the charging and adhesion step;
The process of clamping,
Injecting molten metal charged into the plurality of injection sleeves,
The process of opening the mold after solidifying the hot water,
An aluminum die casting method comprising a step of taking out a die-cast product, and a step of performing air cleaning, a release material spray, and a lubricant spray treatment. An aluminum die casting method using the aluminum die casting apparatus according to claim 1,
(I) a step of allowing a device in which a heat insulating material insertion device and a molten ladle tilting device are integrally coupled to enter between an upper die and a lower die;
(II) A plurality of cylindrical devices adsorbing the heat insulating material are lowered into the lower mold, the heat insulating material is inserted into the injection sleeve, and the heat insulating material is brought into close contact with the inner wall of the injection sleeve. Process,
(III) a step of advancing the apparatus and pouring the molten metal from the molten ladle into the heat insulating material;
(IV) retracting the device;
(V) a process of closing the upper mold and clamping the mold,
(VI) A step of sucking and holding the inside of the mold cavity with high vacuum (VII) A step of injecting molten metal,
(VIII) a step of solidifying hot water;
(IX) a step of raising the upper mold after completion of solidification of hot water;
(X) a step of advancing the take-out / lubricating device between the upper mold and the lower mold and extruding the product from the mold;
(XI) The process of taking out the extruded product and receiving it in a lubrication device,
(XII) A step of retracting the take-out / lubrication device, and (XIII) a step of performing air cleaning, a release material spray, and a lubricant spray process.