KR100644922B1 - Mold for injection molding machine having heat transfer member - Google Patents

Abstract

A mold for an injection molding machine having a heat transfer member is provided to shorten the cycle time of injection molding, by maintaining the temperature of the mold at an appropriate level and quickly cooling the mold during or after injection. A mold(100) comprises cavity mold(20) and a core mold. The core mold includes an intermediate core mold plate(30) having a thin thickness; a core mold support plate(40) having a thick thickness; a guide pin(41) to be inserted into a first guide hole formed at the cavity mold so as to restrict the intermediate core mold plate so that the intermediate core mold plate is movable only in forward and rearward directions; a first elastic member interposed between the intermediate core mold plate and the core mold support plate so as to separate the intermediate core mold plate from the core mold support plate by elasticity when the core mold moves in a rearward direction; a first heating unit arranged on the separated surface of the intermediate core mold plate so as to heat the intermediate core mold plate; a first cooling unit for cooling the core mold support plate; and a heat transfer member arranged on the surface of intermediate core mold plate directed toward the core mold support plate or on the surface of the core mold support plate directed toward the intermediate core mold plate so as to quickly heat the intermediate core mold plate.

Description

Separable mold device for injection molding machine with heat transfer member {MOLD FOR INJECTION MOLDING MACHINE HAVING HEAT TRANSFER MEMBER}

1 is a schematic view of an open state of the mold apparatus of one embodiment according to the present invention

2 is a schematic view of a closed state of the mold apparatus of the embodiment shown in FIG.

3 is a detailed view of the electrothermal heater of the core intermediate mold of the embodiment shown in FIG.

4 (a) and 4 (b) are schematic views of another embodiment of the electrothermal heater of the core intermediate mold shown in FIG.

5 is a schematic view of an open state of the mold apparatus of another embodiment according to the present invention

6 is a schematic view of a closed state of the mold apparatus of the embodiment shown in FIG.

<Brief Description of Drawings>

10 Cavity mold fixed plate 20 Cavity mold

30 Middle core mold 33 Electric heater

35 Core mold bush 40 Core mold support plate

41 Guide pin 43 Coolant piping

50 Core mold fixing plate 60 Intermediate cavity mold plate

70 Cavity Mold Support Plate 80 Temperature Sensor

The present invention relates to a mold apparatus for an injection molding machine, and more particularly, to cycle time of injection molding including a separate intermediate mold having a cavity surface or a core surface which can be heated before injection and cooled simultaneously with the injection. The present invention relates to a mold apparatus capable of short injection molding. In addition, the mold apparatus of the present invention relates to a mold apparatus capable of producing a high-quality injection molded product by having a desired temperature for each part of the mold surface at the time of injection.

The injection molding method of a synthetic resin or metal refers to a manufacturing method of injecting and cooling a synthetic resin or metal in a molten state between a fixed mold (cavity mold) having a cavity and a movable mold (core mold) having a core to obtain a molded article having a cavity shape. .

In the injection molding method, when the molten material is injected, the temperature of the mold is preferably the same as that of the molten material. This is because the flow of the injected material and the transferability of the pattern of the cavity surface can be improved, and the deformation due to the residual stress can be reduced after the molten material is hardened. In addition, after the injection of the molten material is completed, it is preferable that the temperature of the mold is low so that the completed injection of the material can be quickly cooled to shorten the cycle time of the injection molding to increase productivity.

However, increasing the temperature of the mold by heating the mold improves fluidity and transferability, but it takes a lot of time to cool, resulting in a long cycle time of injection molding, and a volume that allows the mold to cool rapidly to shorten the cycle time. If the size is small, there is a problem that the deformation occurs in the product or the durability is poor due to the weak rigidity.

The present invention relates to a mold apparatus having heating and cooling means of a mold, wherein the mold is rapidly cooled after the injection is in progress or completed while maintaining the temperature of the mold to maintain the fluidity and transferability of the molten material to be injected. It is an object of the present invention to provide a mold apparatus having excellent productivity by shortening the cycle time of molding. In other words, if the temperature of the mold is increased, it takes a lot of time to cool down, and the cycle time of the injection molding is long, and if the size is reduced so that the mold is cooled down quickly to shorten the cycle time of the injection molding, An object of the present invention is to provide a mold apparatus that can solve the phenomenon.

In addition, an object of the present invention is to provide a mold apparatus capable of manufacturing a high-quality injection molded product without deformation by controlling the cooling rate of the injection molded product by having a desired temperature for each part of the mold surface, and at the same time reduce cycle time. It is done.

In addition, an object of the present invention is to provide a mold apparatus having a heat transfer member for rapidly cooling the mold to reduce the cycle time of production.

The mold apparatus according to the present invention includes a cavity mold having a cavity surface for forming a cavity to be injected into a molten injection material fixed to an injection molding machine, and a core surface for forming the cavity during molding, and formed on a guide pin. The guide includes a core mold installed in the injection molding machine to move back and forth to open and close the cavity. In particular, the core mold has a middle core mold plate including a core surface and has a thin thickness so as to maintain a proper temperature when the molten injection material is injected into the cavity and to cool rapidly after the injection is completed. It is separated by core mold support plate. In addition, it extends from the core mold support plate is installed to be inserted into the guide hole formed in the cavity mold when moving to the cavity mold and is inserted into the intermediate core mold plate and includes a guide pin for restraining the core core mold to be movable only before and after do. In addition, the core mold includes a first elastic member installed between the middle core mold plate and the core mold support plate so that the middle core plate and the core mold support plate are separated by elasticity when the core mold moves backward to open the cavity. In addition, the first heating means for heating the intermediate core mold plate is installed on the separation surface of the intermediate core mold plate, and the core mold support plate has a constant temperature so as to cool the intermediate core mold when it comes into contact with the intermediate core mold plate. A first cooling means for holding the low core mold support plate is provided. In addition, the mold apparatus according to the present invention is installed on the surface facing the core mold support plate of the middle core mold plate or the surface facing the middle core mold plate of the core mold support plate heat transfer member for rapidly cooling the heated intermediate core mold plate It includes. The heat transfer member is a soft metal having a hardness lower than that of a mold, and is preferably a metal selected from gold, silver, copper, or aluminum, or an alloy including a selected metal. Further, according to the present invention, the heat transfer member includes a heat transfer material in a gel state having a decomposition temperature of 180 ° C. or higher, and the heat transfer material is preferably lubricating grease.

According to the present invention, the core mold, which is a movable mold installed to allow relative movement with respect to the cavity mold fixed to the injection molding machine, is separated into a thin middle core mold and a thick core mold support plate, and the intermediate core mold is heated before molding. By heating by means to maintain a temperature suitable for injection molding and the core mold support plate is cooled to maintain a state capable of rapidly cooling the intermediate core mold when in contact with the intermediate core mold. At the time of injection, the core mold support plate moves to the cavity mold side to press the intermediate core mold plate to be in close contact with the cavity mold, and after the injection of the molten injection material is completed, the heating of the heating means is interrupted and the intermediate core mold plate is in contact with the core mold support plate. Cools rapidly. Therefore, when the molten injection material is injected, the core surface temperature is properly maintained to ensure excellent fluidity and transferability, and the mold can be rapidly cooled at the completion of the injection, thereby shortening the cycle time of the injection molding. In particular, the mold apparatus according to the present invention is installed on the surface facing the core mold support plate of the middle core mold plate or the surface facing the middle core mold plate of the core mold plate, so that the heated intermediate core mold plate can be quickly cooled. It becomes possible. In addition, the heat transfer member is provided between the separated intermediate core mold plate and the core mold support plate, thereby alleviating the impact when the intermediate core mold and the core mold support plate collide, thereby increasing durability of the mold apparatus.

In addition, in order to enhance the cooling effect of the intermediate core mold, it is preferable to make the separation surface of the intermediate core mold plate and the core mold support plate completely adhere to each other during cooling. Therefore, the first spring is installed so that the guide pin is inserted using the coil spring, and when the core mold support plate moves forward, a constant depth around the core mold support plate to which the guide pin is fixed so that the first spring is completely inserted into the core mold support plate. It is preferable to form the annular groove of.

In addition, the mold apparatus according to the present invention is to maintain the cavity mold, the cavity surface so that not only the core surface but also the cavity surface at an appropriate temperature when the molten injection material is injected into the cavity and can be cooled rapidly after the injection is completed. It may be separated into an intermediate cavity mold plate having a thin thickness and a cavity mold support plate having a thick thickness and a second guide hole formed therein. In addition, one end is fixed to penetrate the intermediate cavity die plate to restrain the intermediate cavity die plate to be movable only forward and backward, and the other end includes a hollow guide cylinder inserted into the second guide hole of the cavity die support plate. do. Also, a second spring is installed between the intermediate cavity mold plate and the cavity mold support plate so that the intermediate cavity mold plate and the cavity mold support plate are separated by elasticity when the core mold moves backward to open the cavity. A second heating means for heating the intermediate cavity mold plate is provided on the separating surface of the intermediate cavity mold plate, and includes second cooling means for cooling the cavity mold support plate. In addition, the mold apparatus according to the present invention is a heat transfer member for quickly cooling the intermediate cavity mold plate is installed on the surface facing the cavity mold support plate of the intermediate cavity mold plate or the surface facing the intermediate cavity mold plate of the cavity mold support plate It includes.

According to the present invention, when the cavity mold as well as the cavity mold are separated into the intermediate cavity mold plate and the cavity mold support plate, the intermediate cavity mold is heated by heating means prior to molding to maintain a temperature suitable for injection molding, and the cavity mold support plate is cooled to intermediate cavity. When in contact with the mold, it is possible to maintain a state that can rapidly cool the intermediate cavity mold. That is, the injection of the molten injection material is completed while the core mold support plate is moved to the cavity mold side during injection, and the intermediate core mold plate, the intermediate cavity mold plate, and the cavity mold support plate are pressed to closely contact each other. By blocking the heating of the heating means to complete the injection while maintaining all the cavity surface temperature suitable for injection, it is possible to rapidly cool the entire cavity when the injection is completed. Therefore, when the molten injection material is injected, the temperature of the cavity surface and the core surface is properly maintained to secure excellent fluidity and transferability, and the mold can be rapidly cooled at the completion of injection, thereby shortening the cycle time of injection molding. have.

In addition, in order to increase the cooling effect of the intermediate cavity mold, it is preferable to make the separation surface of the intermediate cavity mold plate and the cavity mold support plate completely adhere to each other during cooling. That is, a large diameter portion of a predetermined depth is installed so that the hollow cylinder is inserted into the second spring using the coil spring, and the second spring is inserted completely when the intermediate cavity mold plate is moved backward in the second guide hole of the cavity mold support plate. It is preferable to form. In addition, it is advantageous to simplify the structure by using the hollow of the guide cylinder as the first guide hole so that the guide pin is inserted into the hollow of the guide cylinder when the core mold moves toward the cavity mold.

The first and second heating means use a heat heater that can easily control the amount of heat generated, and in particular, the groove on the separation surface of the mold plate to directly transfer heat generated by contacting the intermediate core mold and the intermediate cavity mold plate. Dig and insert to install. In addition, in order to promote heat transfer by increasing the contact area between the intermediate core mold plate and the core mold support plate, it is preferable to fill copper in the space between the groove into which the heat transfer heater is inserted and the heat transfer heater. In addition, the intermediate core mold plate may be provided with a temperature sensor to control the amount of heat generated by the heat transfer heater to maintain the temperature of the core mold in a certain range. The first and second cooling means includes a cooling pipe inserted into the core mold support plate and installed to allow the cooling water to flow. In addition, the heat heater may be one that extends each heating wire, it is more preferable to use a plurality of heating wire to adjust the temperature of the cavity surface or core surface for each part and to be able to independently control the amount of heat. By controlling the temperature for each part of the mold surface, the cooling rate of the injection-molded product can be adjusted to remove deformation caused by residual stress and produce high quality products.In addition, the cooling speed can be increased to shorten the cycle time to improve productivity. Can be.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

1 is a schematic view of an open mold apparatus of an embodiment according to the present invention, Figure 2 is a schematic view of a closed mold apparatus of the embodiment shown in Figure 1, Figure 3 is a view of the embodiment shown in FIG. It is a detailed view of the electrothermal heater of the core middle mold, and FIG. 4 (a) and FIG. 4 (b) are schematic views of another embodiment of the electrothermal heater of the core intermediate mold shown in FIG.

As shown in FIG. 1, the mold apparatus 100 of the present embodiment is guided to the cavity mold 20 and the guide pin 41 to be fixed to the injection molding machine, not shown, and slides forward and backward of the cavity mold 20. Intermediate core mold 30 is installed so that the guide pin 41 is fixed to the core mold fixing plate 50 is installed to enable the injection molding machine and inserted into the bush 35 of the intermediate core mold (30) A fixed core mold support plate 40 and a heat transfer member 94 for rapidly cooling the intermediate core mold plate 30 are included. In the cavity mold 20, a cavity surface 21 into which molten injection material is injected is formed, and an injection passage 23 of the molten injection material is connected to the cavity surface 21. In addition, the cavity mold 20 is formed with a guide hole 22 for inserting the guide pin 41. The core surface 31 is formed in the surface facing the cavity surface 21 of the intermediate core mold plate 30. Referring to FIG. 2, which shows a state in which the cavity mold 20 and the intermediate core mold 30 are combined, the core surface 31 includes a cavity C into which the molten injection material is injected together with the cavity surface 21. Form. The intermediate core mold plate 30 is a plate shape having a thickness thinner than the core mold support plate 40 so as to facilitate heating and cooling, and separates the conventional core mold.

1 and 2, a plurality of grooves 36 are formed in the separation surface of the intermediate core mold plate 30, and the intermediate core mold plate 30 is heated in each of the grooves 36. The heat transfer heater 33 is inserted. 3, the heat transfer heater 33 is comprised so that the insulation coating 33b may surround the heating wire 33a like a nichrome wire. In addition, in order to increase the contact area between the intermediate core mold plate 30 and the core mold support plate 40 and to promote heat transfer at the same time, between the groove 36 and the heat heater 33 into which the heat transfer heater 33 is inserted. The copper member 37 is filled in the space. Referring to FIG. 4, the heating heater 33 may use one heating wire as shown in FIG. 4A, but may be installed using a plurality of heating wires as shown in FIG. 4B. . Reference numeral 34 denotes a control device for controlling the amount of heat generated by the heat transfer heater 33. When a plurality of heating wires are used, the amount of heat generated by the heating wires 33 can be appropriately controlled to make the temperature of the core surface 31 of the intermediate core mold plate 30 uniform. In addition, the intermediate core mold plate 30 is provided with a temperature sensor 80. The temperature sensor 80 measures the temperature of the intermediate core mold plate 30 in real time to properly control the calorific value of the electrothermal heater in the controller 34 so as to maintain the temperature of the core mold in a certain range. Although one temperature sensor is shown in the present embodiment, a plurality of temperature sensors may be provided as necessary. In particular, when it is desired to control the heat generation amount of the heat transfer heater to have a different temperature for each part of the mold surface, it is preferable to install a temperature sensor for each part of the desired temperature.

In addition, the core mold support plate 40 is provided with cooling means for maintaining the core mold support plate 40 at a constant temperature so as to cool the intermediate core mold plate when contacted with the intermediate core mold plate 20. In the present embodiment, the cooling means includes a cooling water tank (not shown), a pump for circulating the cooling water, and a cooling water pipe 43 formed in the core mold support plate 40. Cooling water pipe 43 is connected in the core mold support plate 40, the side of the core mold support plate 40 is formed with an inlet port and an outlet port not shown.

In addition, a first elastic member, which is a coil spring 90, is inserted into the guide pin 41 between the intermediate core mold plate 30 and the core mold support plate 40. The coil spring 90 allows the intermediate core mold plate 30 and the core mold support plate 40 to be separated by elasticity when the core mold support plate 40 moves backward to open the cavity. The middle core mold plate 30 is rapidly heated by the heat generation of the heat transfer heater 33 by blocking the cooling by In particular, as shown in FIG. 2, after the injection of molten injection material into the cavity C formed by closely contacting the intermediate core mold 30 to the cavity mold 20, the cooling effect of the intermediate core mold plate 30 is achieved. In order to increase the separation of the intermediate core mold plate 30 and the core mold support plate 40 is preferably to be in close contact. Therefore, the coil spring 90 is inserted into the guide pin 41 and installed, and as shown in FIG. 2, when the core mold support plate 40 moves and contacts the intermediate core mold plate 30, the coil spring 90 is installed. The guide pin 41 is to be completely inserted into the annular groove 44 of a constant depth formed around the core-shaped support plate 40 fixed. The heat transfer member 94 is inserted into a surface of the intermediate core mold plate 30 facing the core mold support plate 40 or a surface of the core mold support plate 40 facing the intermediate core mold plate 30. The heat transfer member 94 is installed on the surface between the intermediate core mold plate 30 and the core mold support plate 40, thereby rapidly cooling the heated intermediate core mold plate 30. The heat transfer member 94 is a soft metal having a hardness lower than that of the core mold, and is preferably made of a metal selected from gold, silver, copper, tin, lead, aluminum, or an alloy including the selected metal. The heat transfer member 94 is a gel heat transfer material having a decomposition temperature of 180 ° C. or higher, and the heat transfer material is lubricating grease.

Hereinafter, the operation and effect of the present embodiment will be described. A method of manufacturing an injection molded article using the mold apparatus according to the present embodiment is as follows. First, in the state shown in FIG. 1 in which the mold apparatus 100 of this embodiment is installed in the injection molding machine, the current is supplied to the heat transfer heater to heat the intermediate core mold plate 20 to a temperature suitable for injection molding. At the same time, the cooling water flows into the cooling water pipe 43 of the core mold support plate 40 to cool the core mold support plate 40 so as to maintain a temperature necessary for efficient cooling. When the intermediate core mold plate 20 and the core mold support plate 40 reach a temperature suitable for injection and cooling, the core mold fixing plate 50 is moved to the left side (to the cavity mold side) in the drawing to move the cavity mold 20 and the intermediate mold plate 20 to the middle. The core mold plate 30 and the core mold support plate 40 are in close contact with each other. Next, the molten injection material is injected into the cavity C formed as shown in FIG. 2, and the power of the heat transfer heater is cut off during the injection or when the injection is completed. When the injection is completed and the solidification of the injection material is completed, the core mold fixing plate 50 is moved rearward (to the right in the figure) so that the guide pin 41 is separated from the guide hole 22. At this time, the intermediate core mold plate 30 is separated from the core mold support plate 40 by the restoring force of the coil spring 90, the cooling is cut off, and power is supplied to the electrothermal heater 33 at the same time. Is heated. The injection molded product is removed from the cavity C, and the above process is repeated to perform injection.

When the mold apparatus according to the present embodiment is used, the intermediate core mold plate 30 is heated by heating means prior to molding to maintain the temperature suitable for injection molding, and the core mold support plate 40 is cooled to intermediate upon contact with the intermediate core mold. The core mold can be rapidly cooled, and the injection molding can be performed while the intermediate core mold plate 30 is rapidly cooled by the core mold support plate 40 after molding. In particular, since the heat transfer member 94 is installed on the opposite surface of the intermediate core mold plate 30 and the core mold support plate 40, it is cooled more rapidly. As a result, when the molten injection material is injected, the core surface temperature is properly maintained to secure excellent fluidity and transferability, and the mold can be rapidly cooled at the completion of the injection, thereby shortening the cycle time of the injection molding. . In particular, when the heating means is able to independently control a plurality of electrothermal heaters, the mold surface is at a different temperature for each part so that the injection molded product is properly controlled to be deformed by residual stress during cooling, thereby forming a high-quality molded product. Cycle time can be shortened by controlling the cooling rate.

FIG. 5 is a schematic view of an open mold apparatus of another embodiment according to the present invention, and FIG. 6 is a schematic view of a closed mold apparatus of the embodiment shown in FIG.

5 is different from the embodiment shown in FIG. 1, the cavity mold as well as the cavity mold are separated into the intermediate cavity mold plate 60 and the cavity mold support plate 70, and the intermediate cavity mold plate ( The heat transfer heater 63 is installed on the separation surface of the 60, and the cooling water pipe 72 is formed on the cavity mold support plate 70. In addition, one end is fixed through the intermediate cavity mold plate 60 and the other end is formed in the cavity mold fixing plate 70 so that the intermediate cavity mold plate 60 can move in one direction with respect to the cavity mold fixing plate 70. 2 includes a hollow guide cylinder 92 inserted and installed in the guide hole 71. In addition, as shown in FIG. 5, the coil spring for separating the intermediate cavity mold plate 60 from the cavity mold support plate 70 in a state in which the intermediate cavity mold plate 60 and the intermediate core mold plate 30 are opened. 91 is inserted into the guide cylinder 92. Referring to FIG. 6, as the annular groove 44 is formed around the guide pin 41 of the core mold support plate 40 so that the core mold support plate 40 is completely adhered to the intermediate core mold plate 30. The large diameter portion 74 is formed around the second guide hole 71 into which the guide cylinder 92 is inserted, and the coil spring 91 is inserted to form the intermediate cavity mold plate 60 and the cavity mold support plate 70. It is designed to be completely in contact In addition, the heat transfer member 95 is included on a surface of the intermediate cavity mold plate 60 facing the cavity mold support plate 70 or a surface of the cavity mold support plate 70 facing the intermediate cavity mold plate 60. Since the heat transfer member 95 is installed on the surface between the intermediate core mold plate 30 and the core mold support plate 40, the heat transfer member 95 rapidly cools the heated intermediate core mold plate 30. The heat transfer member 95 is a soft metal having a smaller hardness than the cavity mold, and is preferably made of a metal selected from gold, silver, copper, tin, lead, aluminum, or an alloy containing the selected metal. In addition, the heat transfer member 95 is a heat transfer material in a gel state having a decomposition temperature of 180 ° C. or higher, and the heat transfer material is preferably lubricating grease.

In this embodiment, the eject pin for separating the injection-molded product from the mold is not shown, but in the case of products in which the product is not naturally released from the mold, the product molded through the intermediate cavity mold or the intermediate core mold is molded. Eject pins should be installed to release them from the

The method using the mold apparatus of this embodiment heats the intermediate cavity mold 40 to a temperature suitable for injection molding before injection, and the cavity mold support plate 70 is cooled in advance to a temperature suitable for cooling the material injected into the cavity. It is the same as the usage of the previous embodiment except that.

In the mold apparatus of the present embodiment, the cavity mold as well as the cavity mold are separated into the intermediate cavity mold plate 60 and the cavity mold support plate 70, and the intermediate cavity mold plate 60 is heated by heating means prior to molding so as to be suitable for injection molding. The temperature is maintained at the temperature and the cavity mold support plate 70 is cooled to maintain a state capable of rapidly cooling the intermediate cavity mold plate 60 upon contact with the intermediate cavity mold plate 60. In addition, since the heat transfer member 95 is installed on the opposite surface between the cavity mold support plates 70 of the intermediate cavity mold plate 60, the intermediate cavity mold plate 60 can be cooled more rapidly. Therefore, when the molten injection material is injected, the temperature of the cavity surface and the core surface is maintained at an appropriate state for injection molding to ensure excellent fluidity and transferability, and the mold can be rapidly cooled at the completion of the injection to cycle the injection molding. The time can be shortened. In particular, heat transfer heaters are installed in the intermediate cavity die plate and the intermediate core die plate, and the cycle time can be shortened by controlling the cooling rate by changing the temperature of each die plate.

According to the present invention, there is provided a mold apparatus having a separated intermediate core mold plate and an intermediate cavity mold plate. The separated intermediate core mold and the intermediate cavity mold plate are heated by heating to an appropriate temperature before injection molding using an electric heater, and rapidly cooled by the previously cooled separated core mold support plate and the cavity mold support plate for fluidity and transfer. Excellent moldability and short cycle time of injection molding provide a mold apparatus with high productivity. In particular, by using a plurality of electrothermal heaters can be controlled to have different temperatures for each part of the mold surface, it is possible to control the cooling rate of the product to control the deformation caused by the residual stress and to shorten the cycle time It is possible to provide a more productive mold apparatus.

According to the present invention, the surface facing the core mold support plate of the intermediate core mold plate or the surface facing the intermediate core mold plate of the core mold support plate, the surface facing the cavity mold support plate of the intermediate cavity mold plate or the intermediate cavity of the cavity mold support plate Since the heat transfer member is installed on the surface facing the mold plate, the intermediate core mold and the intermediate cavity mold can be cooled more quickly, thereby providing a mold apparatus that further improves productivity by shortening the cycle time.

An embodiment of the present invention described above and illustrated in the drawings should not be construed as limiting the technical spirit of the present invention. The protection scope of the present invention is limited only by the matters described in the claims, and those skilled in the art can change and change the technical idea of the present invention in various forms. Therefore, such improvements and modifications will fall within the protection scope of the present invention, as will be apparent to those skilled in the art.

Claims (13)

Cavity mold having a cavity surface for forming the cavity to be injected into the injection molding machine is fixed to the injection molding machine, and having a core surface for forming the cavity at the time of molding, and guided by a guide pin to open and close the cavity In the mold apparatus including a core mold installed in the injection molding machine to be movable, The core mold is divided into an intermediate core mold plate including a core surface and having a thin thickness, and a core mold support plate having a thick thickness, and extends from the core mold support plate to be moved to the cavity mold to form a first mold. The guide pin is installed to be inserted into the guide hole and inserted into the intermediate core mold plate to restrain the intermediate core mold only to be moved forward and backward, and when the core mold moves backward to open the cavity, the intermediate core mold and the core mold A first elastic member provided between the intermediate core mold plate and the core mold support plate so that the support plate is separated by elasticity, First heating means installed on a separate surface of the intermediate core mold plate to heat the intermediate core mold plate, First cooling means for cooling the core mold support plate; Injection is characterized in that it comprises a heat transfer member for quickly cooling the heated intermediate core mold plate is installed on the surface facing the core mold support plate of the intermediate core mold plate or the middle core mold plate of the core mold support plate Separate mold device for molding machine. The method of claim 1, The cavity mold is divided into an intermediate cavity mold plate including a cavity surface and having a thin thickness, and a cavity mold support plate having a thick thickness and a second guide hole formed therein. A hollow guide cylinder is inserted into the second guide hole of the cavity mold support plate and the cavity is open at one end thereof so as to restrain the intermediate cavity mold plate from being moved forward and backward only, and the other end is inserted into the second guide hole of the cavity mold support plate. And a second spring installed between the intermediate cavity mold plate and the cavity mold support plate so that the intermediate cavity mold plate and the cavity mold support plate are separated by elasticity when the core mold moves backwards. Second heating means for heating the intermediate cavity mold plate is provided on the separation surface of the intermediate cavity mold plate; Second cooling means for cooling the cavity mold support plate; Injection is characterized in that it comprises a heat transfer member for quickly cooling the intermediate cavity mold plate is installed on the surface facing the cavity mold support plate of the intermediate cavity mold plate or the surface facing the intermediate cavity mold plate of the cavity mold support plate Separate mold device for molding machine. The method according to claim 1 or 2, The heat transfer member is a separate mold device for an injection molding machine, characterized in that the soft metal is less hardness than the core mold. The method of claim 3, The heat transfer member is a separate mold device for an injection molding machine, characterized in that the metal selected from gold, silver, copper, tin, lead, aluminum, or an alloy containing a selected metal. The method according to claim 1 or 2, The heat transfer member is a separate mold device for an injection molding machine, characterized in that the decomposition temperature comprises a heat transfer material of a gel state of 180 ℃ or more. The method of claim 5, The heat transfer material is a separate mold device for injection molding machine, characterized in that the lubricating grease. The method according to claim 1 or 2, The first heating means includes a heat transfer heater is inserted into the groove formed in the separation surface of the intermediate core mold plate, The first cooling means is inserted into the core mold support plate separate mold apparatus for injection molding machine comprising a cooling water pipe installed to flow the cooling water. The method of claim 7, wherein Separating mold apparatus for injection molding machine further comprises a copper member filled in the space between the groove and the heat transfer heater is inserted into the heat transfer heater to promote heat transfer. The method of claim 8, The first elastic member is a coil spring and the guide pin is inserted and installed, and around the core mold support plate to which the guide pin is fixed, an annular groove having a constant depth so that the coil spring is completely inserted when the core mold support plate moves forward. Formed, Separation mold apparatus for injection molding machine further comprising a temperature sensor for measuring the temperature is inserted into the intermediate core mold plate. The method of claim 9, The electrothermal heater is a plurality, separate mold apparatus for injection molding machine, characterized in that each can be adjusted independently.  The method of claim 2, The second heating means includes a heat transfer heater is inserted into the groove formed in the separation surface of the intermediate cavity mold plate, The second cooling means is inserted into the cavity mold support plate separated mold apparatus for injection molding machine, characterized in that it comprises a cooling water pipe installed to flow the cooling water.  The method of claim 11, The second spring is a coil spring and the hollow cylinder is inserted and installed, and a large diameter portion having a constant depth is formed in the second guide hole of the cavity mold support plate so that the second spring is fully inserted when the intermediate cavity mold plate is moved backwards. , Separation mold apparatus for injection molding machine, characterized in that the plurality of heat transfer heater installed in the intermediate cavity mold plate.  The method of claim 12, Separating mold apparatus for injection molding machine, characterized in that the hollow of the guide cylinder is the first guide hole, the guide pin is installed to be inserted into the hollow of the guide cylinder when the core mold moves toward the cavity mold.

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