KR101388550B1 - An apparatus for injection, compression, transfer molding and a method therefor - Google Patents

Abstract

The present invention includes a mold module. and comprises: an injection device for supplying a resin into the mold module; and the mold module which includes a resin chamber temporarily storing a molten resin supplied from the injection device, a driving unit for compressing and transferring the resin inside the resin chamber, and a nozzle receiving the resin from the resin chamber by being connected to the resin chamber and transferring the resin to a cavity where an injection molded material is formed. The mold module includes: a sprue, a passage for the molten resin initially supplied to the mold module from the injection device and connected to the resin chamber; a cavity block which is a block for forming a shape surface of the cavity; a cavity plate which is a plate for coupling the cavity block; and a plunger for compressing the resin inside the resin chamber. The resin chamber is a molten resin storage space in a cylinder form produced by being surrounded by the cavity plate, the cavity block and the plunger. The driving unit includes the cavity block and the plunger.

Description

Injection compression transfer molding apparatus and a molding method using the same {An apparatus for injection, compression, transfer molding and a method therefor}

The present invention relates to an injection compression delivery molding apparatus and a molding method using the same. Specifically, the present invention provides a plurality of nozzles by using a resin chamber in which resin is injected by injection of the injection molding machine and mounted in the injection molding machine, and compression by the clamping mechanism in the chamber. The present invention relates to an injection compression transfer molding apparatus using a mold module having a structure in which a resin is transferred to a cavity to be introduced into a cavity, and a molding method using this method.

In general, polymer resins may be classified into thermoplastic resins that melt upon application of heat and thermoset resins that heat upon application of heat, depending on their properties.

Various methods are used to shape the polymer resin into a desired shape. Injection molding is a general molding method in which a polymer resin is fluidized inside a cylinder of an injection molding machine to a heater mounted on the machine and pressed into a mold by a pressure plunger. Compression molding is a method of melting the resin in the lower mold of the mold and pressing the mold into the upper mold of the mold.In the injection compression molding, the resin is injected into an injection molding machine in a state where the mold is not completely closed and the mold is completely closed. How to complete. Transfer molding is a method of making a cylinder-shaped resin transfer chamber in a mold, putting resin therein, and then injecting resin into the cavity of the mold as the piston enters the resin transfer chamber. It is a method using injection when putting resin into a resin delivery chamber. Compared to injection compression molding and injection delivery molding, in the injection compression molding, the resin enters the mold cavity before closing the mold, but in the injection delivery molding, the resin enters the chamber, and in the injection compression molding, the resin inside the cavity fills the cavity. In injection delivery molding, on the other hand, the resin in the chamber is delivered to the cavity and filled. Since these various molding methods have their advantages and disadvantages, in actual application, appropriate molding methods are selected and used depending on the final product and process.

On the other hand, in the injection technology field, the hot runner system heats sprues and runners, which serve as flow paths of molten resin to fill the cavity of the plastic injection mold, by appropriately heating them to keep them molten at all times. It is designed to inject only products continuously without producing solidified sprues and runners. When the hot runner method is used, the material to be discarded is reduced, so the raw material is efficiently used. In addition, since only the cavity needs to be filled, the molding time is shortened, thereby increasing the molding efficiency.

However, in recent injection moldings, it is often necessary to form a small part by arranging a plurality of cavities at narrow intervals. In such a case, when a hot runner is to be used, nozzles cannot be disposed because the cavity distance is narrow, and injection pressure is difficult due to the large pressure loss with the existing hot runner technology. The reason for using the hot runner is to increase the production efficiency and the resin saving, which are the general characteristics of the hot runner, as described above. In recent years, the use of expensive resins for such small parts has led to the reduction of the resin price. It is a bigger realistic reason. Therefore, there is a need for an alternative injection technique that can place nozzles at narrow intervals and cope with excessive pressure drops.

As one prior art related to the molding method, Patent Document 1, which is proposed in the following prior art document, uses two materials and injects them into two different inlets to carry out a transfer molding and an injection molding in two stages. The process of making this is disclosed. In the present invention, the transfer molding is made from above through port 13, and the injection molding is made from port 21 from the side to make one part using materials having different functions. A process of melt bonding in a mold. This approach can be considered as one invention with the aim of increasing space efficiency and productivity, but it is considered to be applicable only to special parts. Therefore, it is difficult to apply the general-purpose technology applied to the molding of parts arranged at narrow intervals in place of the existing hot runner.

In case of attaching several nozzles to mold many products in the existing hot runner, the pressure drop is severe and in most cases, the practical application is unreasonable. In order to solve this problem, the present invention makes it possible to attach several nozzles without a large pressure drop in the hot runner through injection compression transfer molding, and transfer molding by compression by adding a chamber and a plunger to an existing hot runner nozzle is possible. It was made possible. The present invention proposes a mold and a molding method that can replace the existing hot runner injection technology in such a way that after injection into the resin chamber is compressed by the mold mechanism and transferred to the cavity through each nozzle.

JP 03-243316 A 1991.10.30.

Therefore, the problem to be achieved by the present invention is that it is impossible to implement the existing hot runner mold due to excessive pressure drop, narrow cavity spacing, flow imbalance, etc. It is to provide a hot runner mold technology and a molding method that enable it.

In order to solve the above technical problem, the present invention provides a resin chamber for temporarily storing molten resin supplied from an injection molding machine, a driving mechanism for compressing and delivering the resin in the resin chamber, and connected to the resin chamber, A nozzle receiving the resin from the chamber and delivering it to a cavity, which is a space in which an injection molding is formed, a sprue which is a passage connecting the resin chamber with molten resin supplied from the injection machine, and a shape surface of the cavity ( A cavity block, which is a block forming a surface, a cavity plate, which is a plate to which the cavity block is fastened, and a plunger for compressing a resin in the resin chamber, wherein the resin chamber includes the cavity plate, the cavity block, and the A cylinder-shaped molten resin holding space is formed surrounded by a plunger, the drive mechanism is Including the plunger and Beattie block, and provides a die module (mold module) for compressing the resin by a relative movement of the plunger and the cavity block.

In addition, the present invention is the resin chamber of N1 (N1> natural water) for temporarily storing the molten resin supplied from the injection machine; A drive mechanism for compressing and delivering the resin in the N1 resin chambers; A nozzle connected to each of the N1 resin chambers and receiving a resin from the resin chamber and delivering the resin to a cavity which is a space where an injection molded product is formed; A sprue which is a passage until the molten resin is supplied and branched from the injection machine; A manifold for branching the resin supplied to the sprue N1 times; N1 runners each of which is a passage connecting the resin branched N1 times from the manifold with the N1 resin chambers; A cavity block that is a block forming a shape face of the cavity; A cavity plate which is a plate to which the cavity block is fastened; And a plunger for compressing the resin in the N1 resin chambers, wherein N2 nozzles (N2> 1, N2≥N1 natural water) are connected to each of the N1 resin chambers so that a total of N1 × N2 nozzles are included. And a total of N1 × N2 cavities connected to the N1 × N2 nozzles in the cavity block, and the N1 resin chambers are formed by being surrounded by the cavity plate, the cavity block, and the plunger, respectively. It is a molten resin holding space of the form, The drive mechanism includes the cavity block and the plunger, compress the resin by the relative movement of the plunger and the cavity block, the resin by the relative movement of the plunger and the cavity block At the same time, the resin passes through each of the N1 × N2 nozzles and is delivered to the N1 × N2 cavities, wherein the N1 × N2 nozzles each have a nozzle bar. a nozzle body, a temperature controlled heater, a nozzle housing, an air insulation layer, and connected to the gate, each of which is compressed through the gate in the resin compression in the resin chamber. Provided is a mold module that operates to transfer resin to the cavity.

According to another aspect of the present invention, there is provided an injection molding machine, comprising: an injector to which a mold module is mounted; A resin chamber for temporarily storing molten resin supplied from the injection molding machine, a driving mechanism for compressing and delivering the resin in the resin chamber, and a cavity connected to the resin chamber to receive resin from the resin chamber and to form an injection molded product. And a mold module including a nozzle to transfer the mold module, wherein the mold module includes a sprue which is a passage through which molten resin is first supplied to the mold module and connected to the resin chamber; A cavity block that is a block forming a shape face of the cavity; A cavity plate which is a plate to which the cavity block is fastened; And a plunger for compressing the resin in the resin chamber, wherein the resin chamber is a cylinder-type molten resin holding space formed by being surrounded by the cavity plate, the cavity block, and the plunger, and the driving mechanism is connected to the cavity block. An injection compression delivery molding apparatus including the plunger and compressing the resin by relative movement of the plunger and the cavity block is provided.

In addition, the present invention is an injection compression transfer molding method using a mold module according to the present invention and an injection machine in which the mold module is mounted. A first step of setting, a second step of injecting resin into the resin chamber from the injection machine, a third step of compressing the resin in the resin chamber by moving the drive mechanism by a mold mechanism or an external hydraulic mechanism of the injection machine, A fourth step in which the resin is transferred to the cavity through the nozzle, a fifth step in which the movement of the driving mechanism is completed, and the filling of the cavity is completed, the solidification of the cavity-in resin is completed, and the mold module is released. Provided is an injection compression delivery molding method comprising a sixth step.

In addition, the present invention is an injection compression transfer molding method using a mold module and an injection machine in which the mold module is mounted according to the present invention, which moves the movable side of the mold module to close the mold module and sets an initial position of the plunger. A first step, a second step of injecting resin into the resin chamber from the injection machine, and a third step of compressing the resin in the resin chamber by relatively moving the plunger and the cavity block by the clamping mechanism or the external hydraulic mechanism of the injection machine. Step 4, the resin is transferred to the cavity through the nozzle, the fourth step, the relative movement of the plunger and the cavity block is finished, the fifth step of the filling of the cavity is completed, the cooling and solidification of the resin in the cavity is completed And it provides an injection compression delivery molding method comprising a sixth step of releasing the mold module.

The present invention has the effect of enabling hot runner technology to be applied to molds having cavities arranged at narrow intervals. This has the effect of reducing the cost of the resin wasted when using the cold runner.

In addition, the present invention has the effect of significantly lowering the pressure drop by applying to a mold that was difficult to apply due to excessive pressure drop even if the pitch (pitch) interval, which is the interval between the nozzles is enough to apply the existing hot runner technology. As the pressure drop in the mold is lowered, as is known in the conventional injection compression molding, the injection machine injection pressure is lowered, thereby enabling the injection into a low-capacity injection machine and reducing the residual stress of the injection molding product.

In addition, the present invention utilizes transfer molding and has the effect of alleviating filling imbalance between cavities.

1 is a view for explaining the concept of the injection compression delivery molding process of the present invention.
Figure 2 is a block diagram of an injection compression delivery molding apparatus according to the present invention.
Figure 3 is a view for briefly explaining an injection compression delivery molding apparatus according to the present invention.
Figure 4 is a view for briefly explaining the injection machine of the injection compression delivery molding apparatus according to the present invention.
Figure 5 is a view for explaining a mold module of the injection compression delivery molding apparatus according to an embodiment of the present invention.
6 is a view for explaining another part of the same mold module as in FIG.
7 is a view for explaining the concept of injection, compression, delivery in the mold module of the injection compression delivery molding apparatus according to an embodiment of the present invention.
8 is a view for explaining the resin inflow in the mold module of the injection compression delivery molding apparatus according to an embodiment of the present invention.
9 is a view for explaining the resin compression in the mold module of the injection compression delivery molding apparatus according to an embodiment of the present invention.
10 is a view for explaining the resin transfer in the mold module of the injection compression delivery molding apparatus according to an embodiment of the present invention.
11 is a view for explaining the mold opening and the product take-out in the mold module of the injection compression delivery molding apparatus according to an embodiment of the present invention.
12 is a view for explaining the application of the external hydraulic mechanism in the mold module of the injection compression delivery molding apparatus according to another embodiment of the present invention.
FIG. 13 is a view showing a fixed side portion of a general hot runner mold equipped with one nozzle; FIG.
14 is a view showing a fixed side portion of a general hot runner mold equipped with two nozzles.
Figure 15 shows the application of injection compression delivery molding technology to a hot runner single nozzle mold.
Figure 16 shows the application of injection compression delivery molding technology to a hot runner dual nozzle mold.
17 shows a valve applied to a resin chamber.
18 is a view showing the operation and state of the valve in the rest stage, injection stage, compression stage.
19 is a view showing the operation and state of the valve in the delivery step, the solidification step, the release step.
20 shows an example of a micro-shaped injection molded article molded with a cold runner.
21 is a flow chart of the injection compression delivery molding method according to an embodiment of the present invention.
22 is a flow chart of the injection compression delivery molding method according to another embodiment of the present invention.

The present invention is applied to a polymer resin (hereinafter referred to as "resin"). The molding process of the present invention basically consists of three stages of injection, compression, and delivery, and thermal control and valve control use the existing hot runner method. For the conceptual explanation of the molding process, it will be described in three steps, but in the actual application, the compression step and the delivery step of the three steps are performed simultaneously. As will be described in detail later, the driving of the plunger for the compression step is basically carried out by the movement of the clamping mechanism to close and open the mold, or may be operated by adding a hydraulic mechanism to the outside. The valve is required to control the hydraulic pressure of the resin according to the driving stage of the plunger, and the driving of the valve can use the technology used in the existing hot runner as it is. In valve control, the valve is closed in the injection step and the valve is opened in the compression step for transfer molding.

1 is a diagram illustrating the concept of injection compression transfer molding, in which the operation sequence proceeds from left to right. The figure on the left shows the molten resin supplied from the injection molding machine to the chamber. The middle figure shows the plunger pressing the resin in the chamber and compressing it to deliver resin to each cavity. The figure on the right is the one just before the mold is opened and the ejector pin is working to solidify the resin and take it out. That is, FIG. 1 shows a process in which the resin in the chamber is delivered to the cavity through the nozzle by the mold clamping mechanism or the external hydraulic mechanism, and the product is taken out by driving the ejector pin. In FIG. 1, the separating line PL (Parting Line) refers to a line that is divided and split when the fixed side and the movable side of the mold are opened when the product is taken out. In the following description, the fixed side and the movable side of the mold mean a portion divided by the separating line PL.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings.

Referring to Figure 2, which is a block diagram of the injection compression delivery molding apparatus according to the present invention, the injection compression delivery molding apparatus of the present invention is equipped with a mold module 110, an injection machine for supplying resin to the mold module 110 ( 100), a resin chamber (17 in FIGS. 5 and 6) for temporarily storing the molten resin supplied from the injection molding machine 100, a drive mechanism for compressing and delivering the resin in the resin chamber 17, and the resin chamber 17. The mold module 110 includes a nozzle (18 of FIGS. 5 and 6) connected to and supplied with a resin from the resin chamber 17 to a cavity which is a space where an injection molded product is formed. In addition, the mold module 110 of the present invention is a sprue which is a passage through which the molten resin from the injection machine 100 is first supplied to the mold module 110 and connected to the resin chamber 17 (FIGS. 5 and 12 of FIG. 6). A cavity block (24 of FIG. 5), which is a block forming the shape surface of the cavity, a cavity plate (6 of FIG. 5), which is a plate to which the cavity block 24 is fastened, and a resin in the resin chamber 17. A plunger (14 of FIGS. 5 and 6) for compression, and the resin chamber 17 is a cylindrical molten resin holding space formed surrounded by the cavity plate 6, the cavity block 24, and the plunger 14. The drive mechanism includes a cavity block 24 and a plunger 14, and compresses the resin by relative movement of the plunger 14 and the cavity block 24. While the resin is compressed by the relative movement of the plunger 14 and the cavity block 24, the resin passes through the nozzle 18 and is delivered to the cavity. Mold module 110 of the present invention includes a temperature sensor and a heater for controlling the temperature of the resin, the heater is a band heater (11 in Figs. 5 and 6) installed in the portion adjacent to the inlet of the sprue 12 And a heater (15 of FIGS. 5 and 6) surrounding the plunger 14 and controlling the temperature, wherein the temperature sensor includes a thermocouple sensor and is installed at a plurality of points requiring temperature measurement.

3 is a view for briefly explaining the injection compression delivery molding apparatus according to the present invention, Figure 4 is a view for briefly explaining the injection molding machine 100 of the injection compression delivery molding apparatus according to the present invention. 3 and 4, the injection machine 100 of the injection compression delivery molding apparatus of the present invention is an injection machine nozzle which is an outlet for supplying resin to the hopper and the mold module 110 which is an inlet through which resin is supplied to the injection machine 100. And a barrel which is a passage of the resin, an injection machine band heater installed to surround the barrel to control the temperature, a screw installed in the barrel to rotate, a driving unit to rotate the screw, and a speed of the driving unit. And a speed control means for setting and controlling an injection speed and a temperature of the resin, and operating the speed control means and the injection machine band heater under the control of the injection machine control panel to control the mold module 110 through the injection nozzle. Control injection speed and temperature of resin supplied to In addition, the injection compression delivery molding apparatus of the present invention further includes a temperature control unit 120 for controlling the temperature of the resin using the temperature sensor and the heater installed in the mold module 110, the temperature control unit 120 is a mold The band heater and the heater installed in the module 110 are controlled to control the temperature of the resin passing through the sprue 12.

5 is a view for explaining the mold module 110 of the injection compression delivery molding apparatus according to an embodiment of the present invention, which is a view showing another cross-section of the mold module 110 on the basis of one-dot chain line shown in the drawing, FIG. 6 is a view for explaining another part of the same mold module 110 as in FIG. 5. 7 is a view for explaining the concept of injection, compression, delivery in the mold module of the injection compression delivery molding apparatus according to an embodiment of the present invention. 8 is a view for explaining the resin inflow in the mold module of the injection compression delivery molding apparatus according to an embodiment of the present invention. 9 is a view for explaining the resin compression in the mold module of the injection compression delivery molding apparatus according to an embodiment of the present invention. 10 is a view for explaining the resin transfer in the mold module of the injection compression delivery molding apparatus according to an embodiment of the present invention. 11 is a view for explaining the mold opening and product take-out of the mold in the mold module of the injection compression delivery molding apparatus according to an embodiment of the present invention. 12 is a view for explaining the application of the external hydraulic mechanism in the mold module of the injection compression delivery molding apparatus according to another embodiment of the present invention.

5 to 12, the mold module 110 of the present invention, as described above, the resin in the resin chamber 17, the resin chamber 17 for temporarily storing the molten resin supplied from the injection machine 100, It is connected to the resin chamber 17, the drive mechanism for compression and delivery, and receives the resin from the resin chamber 17 includes a nozzle 18 for delivering to the cavity which is a space where the injection molding is formed. The mold module 110 of the present invention is a sprue 12, which is a passage through which the molten resin is first supplied to the mold module 110 and connected to the resin chamber 17, and the shape surface of the cavity of the mold module 110 of the present invention. Cavity block 24, which is a block for forming a cavity, a cavity plate 6, which is a plate to which the cavity block 24 is fastened, and a plunger 14 for compressing the resin in the resin chamber 17, and the resin chamber 17 ) Is a cylindrical molten resin holding space surrounded by the cavity plate 16, the cavity block 24, the plunger 14, the drive mechanism includes a cavity block 24 and the plunger 14, The resin is compressed by the relative movement of the plunger 14 and the cavity block 24. While the resin is compressed by the relative movement of the plunger 14 and the cavity block 24, the resin passes through the nozzle 18 and is delivered to the cavity.

Basically, the relative movement of the plunger 14 and the cavity block 24 is driven in accordance with the movable side movement of the mold module 110 by the mold clamping mechanism of the injection molding machine 100, but an external hydraulic mechanism may be used. When using an external hydraulic mechanism, the plunger 14 includes a wing portion for applying the external hydraulic mechanism, and the relative movement of the plunger 14 and the cavity block is driven by a hydraulic cylinder which is an external hydraulic mechanism installed on the wing portion. Can be. Referring to FIG. 12 as an example, the hydraulic cylinder may be installed and applied to the wing portion of the plunger 14 extending out of the mold module 110.

In order to mold a plurality of products in the mold module 110, a plurality of cavities, which are spaces in which injection moldings are formed, should be formed in the cavity block 24 at narrow intervals. To this end, the mold module 110 of the present invention is mounted with N nozzles (N = 1 natural water) connected to the resin chamber 17, and the cavity block 24 is connected to the N nozzles 18. N cavities to be connected are formed, and the N nozzles 18 each include a nozzle body, a temperature controlled heater, a nozzle housing, an air insulation layer, and a gate. ), And during resin compression in the resin chamber 17, operates to transfer resin to each cavity through the gate (see FIGS. 15 and 16).

The mold module 110 of the present invention includes a temperature sensor and a heater for controlling the temperature of the resin. The heater includes a band heater 11 installed at a portion adjacent to the inlet of the sprue 12, a heater 15 surrounding the plunger 14 and controlling the temperature, the temperature sensor includes a thermocouple sensor, It is installed at a plurality of points where temperature measurement is required.

In addition, the mold module 110 of the present invention includes a top clamping plate (top clamping plate, 1) for fastening the mold module 110 by fastening to the stationary side of the injection molding machine 100; A top compression plate 2 installed adjacent to the top clamping plate 1 to form a sprue bush; A bottom compression plate 3 installed adjacent to the top compression plate 2 to which the plunger 14 is fastened; Engage with the cavity plate 6 to form a closed state of the mold module 110, separate from the cavity plate 6 to form an open state of the mold module 110, and constitute a core, together with the cavity plate 6 A core plate 7 forming a parting line (PL) which is divided into a fixed side and a movable side when the module 110 is opened; A guide bushing 4 and a guide pin 5 for guiding the cavity plate 6 and the core plate 7 to be correctly aligned when the mold module 110 is opened and closed; Support pins 8 for guiding positions of the top compression plate 2, the bottom compression plate 3, the cavity plate 6, and the core plate 7; A bottom clamping plate 10 which is fastened to the movable side template of the injection machine 100 to support the mold module 110; An ejector pin (20), which is a pin that pushes out the solidified product from the cavity after the mold module 110 is opened; An ejector plate (23) installed with an ejector pin (20) to help withdraw the product; A space block 9 installed adjacent to the bottom clamping plate 10 to provide a space in which the ejector pin 20 can move; An eject guide bush 21 and a support pillar 22 for guiding the ejector pin 20 in a movable motion when dispensing the product and distributing the force exerted by the core plate 7; A return pin 19, which is a pin that helps the ejector plate 23 return to its original position after the ejector pin 20 pushes the product out; A parting lock pin 26 that is a pin that serves to keep the cavity plate 6 and the core plate 7 engaged with the mold module 110 in a closed state; A stop bolt 13 connecting and coupling the top clamping plate 1, the top compression plate 2, and the bottom compression plate 3; A female thread to which the male bolt of the stop bolt 13 is connected is formed, guides the movement of the cavity plate 6, and determines the maximum position in which the cavity plate 6 can move in the opening direction of the mold module 110. It further includes a puller bolt (16). The volume of the resin chamber 17 is varied by the plate spacing 25, which is the distance between the bottom compression plate 3 and the cavity plate 6, and the maximum volume of the resin chamber 17 is determined by the puller bolt 16. Determined by the length, before the resin is injected from the injection molding machine 100, the plate spacing 25 is initialized according to the volume of the cavity to be filled, the plate spacing 25 is moved to the movable side of the mold module 110 Is adjusted by.

5 to 11 will be described in detail the operation concept of the injection compression delivery molding process according to the present invention. First, the injection preparation step will be described. When the bottom compression plate 3, the cavity plate 6, and the core plate 7 are all separated while the mold module 110 is open, the bottom clamping plate 10 is right. When the movable side of the mold module 110 is moved to the right side, the parting lock pin 26 is engaged and the plate space 25 is reduced to the minimum, and at the same time, the volume of the resin chamber 17 is minimized. When the movable side is moved to the left side again, in the state where the cavity plate 6 and the core plate 7 are not separated by the parting lock pin 26, the plate space 25 increases, and the resin chamber 17 increases accordingly. Also increases the volume. This operation is the initialization of the plate spacing 25, the initial plate spacing 25 should be adjusted according to the volume of the cavity to be filled, and must be performed by the injection machine 100 panel operation, that is, by the injection machine control panel. In the injection step (FIG. 8), the molten resin flows from the injection machine 100 into the resin chamber 17. In the compression step (FIG. 9), the resin introduced into the resin chamber 17 is compressed by the relative movement of the plunger 14 and the cavity block 24 when the movable side of the mold module 110 moves to the right. In the delivery step (FIG. 10), the resin in the resin chamber 17 is delivered to the respective cavity through the nozzle 18 and the gate at the same time as the resin is compressed. Cooling and solidification of the resin proceed in the same way as in conventional molds. Finally, in the mold release step (FIG. 11), the bottom clamping plate 3 and the cavity plate 6 are removed while the cavity plate 6 and the core plate 7 are not separated by the parting pin 26. When the plate space 25 is separated and widened to the maximum, the movement of the cavity plate 6 is stopped by the puller bolt 16 and the parting lock pin 26 is pulled out while the cavity plate 6 and the core plate 7 are removed. ) Is separated, and after the separation is sufficiently proceeded, the ejector pin is operated to release the mold module 110 to take out the product.

FIG. 13 is a view showing a fixed side part of a general hot runner mold equipped with one nozzle, and FIG. 14 is a view showing a fixed side part of a general hot runner mold equipped with two nozzles. 15 is an injection compression transfer molding technique applied to the hot runner single nozzle mold of FIG. It has a structure for compression and delivery, including the plunger 14 inside the mold as described above. Each nozzle 18 connected to the resin chamber 17 has a form in which the existing hot runner nozzle including the air insulation layer and the heater is miniaturized. FIG. 16 is a view illustrating an application of an injection compression delivery molding technology corresponding to a hot runner dual nozzle, and an enlarged mold of FIG. 15. Referring to FIG. 16 in a more general manner, the mold module 110 of the present invention includes N1 resin chambers (N1 > 1 natural water) for temporarily storing molten resin supplied from the injection molding machine 100, and N1 resin chambers. A drive mechanism for compressing and delivering the resin inside, a nozzle connected to each of the N1 resin chambers to receive resin from the resin chamber and delivering the resin to a cavity, a space in which an injection molded product is formed, and melted resin from the injection machine 100 is molded. The sprue which is a passage until it is first supplied and branched to the module 110, the manifold for branching the resin supplied to the sprue N1 times, and the resin branched N1 times in the manifold with the N1 resin chambers, respectively. N1 runners, which are passages, cavity blocks, which form a shape of the cavity, cavity plates, which are the plates in which the cavity blocks are fastened, and N1, in the resin chamber. And a plunger for compressing the resin, and N2 nozzles (N2> 1, N2≥N1 natural water) are connected to each of the N1 resin chambers, and a total of N1 × N2 nozzles are mounted, and the cavity block A total of N1 × N2 cavities connected to the N1 × N2 nozzles are formed, and the N1 resin chambers are cylinder-shaped molten resin holding spaces formed by being surrounded by the cavity plate, the cavity block, and the plunger, respectively. And the drive mechanism includes the cavity block and the plunger, compresses the resin by the relative movement of the plunger and the cavity block, compresses the resin by the relative movement of the plunger and the cavity block, and Are passed through the N1 × N2 nozzles to the N1 × N2 cavities, respectively, and the N1 × N2 nozzles are nozzle bodies and temperature controlled heaters, respectively. It includes a eater, a nozzle housing, an air insulation layer, and is connected to the gate, and operates to transfer the resin to each cavity through the gate when the resin is compressed in the resin chamber. As such, the present invention makes it possible to apply hot runner technology to molds having cavities arranged at narrow intervals.

17 is a view showing a valve applied to the resin chamber 17, Figure 18 is a view showing the operation and state of the valve in the resting step, injection step, compression step, Figure 19 is a transfer step, a solidification step, a release step Shows the operation and state of the valve in FIG. 17 to 19, it can be seen that as applied to the existing hot runner valve technology, the injection resin is diverged in two directions to secure a space for a device that functions as a pneumatic cylinder. The mold module 110 of the present invention installs a valve in a portion where the resin is supplied to the resin chamber 17, closes the valve at the time of injection of the resin, opens the valve at the time of compression of the resin, and transfers the resin to the cavity. Control as possible.

20 is a view showing an example of a micro-shaped injection molded product molded with a cold runner. Applying the present invention, as shown in Figure 20 it is possible to form a product that was forced to form a cold runner by a hot runner, it is possible to obtain the effect of saving expensive resin material.

Figure 21 shows a flow chart of the injection compression delivery molding method according to an embodiment of the present invention. Referring to FIG. 21, the injection compression transfer molding method using the mold module 110 and the injection molding machine 100 in which the mold module 110 is mounted according to the present invention moves the mold side of the mold module 110 to move the mold module ( The first step (S1 in FIG. 21) of closing the 110 and setting the initial position of the drive mechanism, the second step (S2 in FIG. 21) of injecting the resin into the resin chamber 17 from the injection machine 100, the injection machine The third step (S3 in FIG. 21) of compressing the resin in the resin chamber 17 by moving the drive mechanism by the clamping mechanism or the external hydraulic mechanism of 100, resin is transferred to the cavity through the nozzle 18. The fourth step (S4 of FIG. 21), the movement of the drive mechanism is finished, the fifth step (S5 of FIG. 21) to complete the filling of the cavity, the solidification of the cavity-in resin is completed, the mold module 110 ), And a sixth step (S6 in FIG. 21) of releasing). While the resin is compressed by the movement of the drive mechanism in the third step, the resin passes through the nozzle 18 and is delivered to the cavity in the fourth step. The initial positioning of the drive mechanism in the first step sets the initial volume of the resin chamber 17 in accordance with the volume of the cavity to be filled, and the position of the drive mechanism is the movable side of the mold module 110. Adjust by moving. As mentioned above, since the present invention is applied to a polymer resin, it is applicable to both a thermoplastic resin and a thermosetting resin. However, there is a difference in the temperature range controlled according to the type of resin, and the resin is only solidified by cooling or solidified by thermal curing during the solidification process of the resin. Therefore, the resin solidification of the sixth step is to solidify according to the cooling of the resin when the injected resin is a thermoplastic resin, and to the thermosetting of the resin when the injected resin is a thermoset resin. It solidifies accordingly.

Figure 22 shows a flow chart of the injection compression delivery molding method according to another embodiment of the present invention. Referring to FIG. 22, the injection compression transfer molding method using the injection mold 100 in which the mold module 110 (FIGS. 5 to 11) and the mold module 110 are mounted according to the present invention is a movable side of the mold module 110. To move the mold module 110 to close the mold module 110 and to set the initial position of the plunger 14 (S10 in FIG. 22), and to inject the resin into the resin chamber 17 from the injection machine 100 ( The third step of compressing the resin in the resin chamber 17 by relatively moving the plunger 14 and the cavity block 24 by S20 of FIG. 22, the clamping mechanism of the injection molding machine 100, or the external hydraulic mechanism (FIG. 22). S30), the fourth step in which the resin is delivered to the cavity through the nozzle 18 (S40 in FIG. 22), the relative movement of the plunger 14 and the cavity block 24 is finished, and the filling of the cavity is completed. The fifth step (S50 of FIG. 22), the sixth step (S60 of FIG. 22) to complete the cooling and solidification of the cavity-in resin, and to mold the mold module 110 . While the resin is compressed by the relative movement of the plunger 14 and the cavity block 24 in the third step (S30 in FIG. 22), the resin is nozzle 18 in the fourth step (S40 in FIG. 22). Passed through and delivered to the cavity. The volume of the resin chamber 17 is varied by the plate spacing 25, which is the distance between the bottom compression plate 3 and the cavity plate 6, and the maximum volume of the resin chamber 17 is determined by the puller bolt 16. Determined by the length, the initial positioning of the plunger 14 in the first step (S10 of Fig. 22) is to set the initial volume of the resin chamber 17 in accordance with the volume of the cavity to be filled, the plate interval (25) is adjusted and set to the movable side movement of the mold module 110. FIG.

1: Top Clamping Plate
2: Top Compression Plate
3: Bottom Compression Plate
4: guide bushing
5: guide pin
6: Cavity Plate
7: Core Plate
8: Support Pin
9: Space Block
10: Bottom Clamping Plate
11: Band Heater
12: Sprue
13: Stop Bolt
14: Plunger
15: Heater
16: Puller Bolt
17: Resin Chamber
18: Nozzle
19: Return Pin
20: Ejecter Pin
21: Eject Guide Bush
22: Support Pillar
23: Ejecter Plate
24: Cavity Block
25: plate spacing, distance between bottom compression plate (3) and cavity plate (6)
26: Parting Lock Pin
PL: Parting line divided into fixed and movable side when the mold module is opened
100: injection machine
110: mold module
120: temperature control unit

Claims (23)

delete A resin chamber for temporarily storing the molten resin supplied from the injection machine;
A drive mechanism for compressing and delivering the resin in the resin chamber;
A nozzle connected to the resin chamber and receiving the resin from the resin chamber and transferring the resin to a cavity which is a space where an injection molded product is formed;
A sprue which is a passage through which molten resin is supplied from the injection machine and connected to the resin chamber;
A cavity block that is a block forming a shape face of the cavity;
A cavity plate which is a plate to which the cavity block is fastened;
A plunger for compressing the resin in the resin chamber;
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The resin chamber is a cylinder-shaped molten resin holding space formed by being surrounded by the cavity plate, the cavity block, and the plunger,
The drive mechanism includes the cavity block and the plunger and compresses the resin by relative movement of the plunger and the cavity block. 3. The method of claim 2,
A mold module, wherein the resin is compressed by the relative movement of the plunger and the cavity block, and the resin is passed through the nozzle to the cavity. 3. The method of claim 2,
The relative movement of the plunger and the cavity block
A mold module driven in accordance with the movement of the movable side of the mold module by the mold mechanism of the injection machine. 3. The method of claim 2,
The plunger includes a wing for applying an external hydraulic mechanism,
The relative movement of the plunger and the cavity block
Mold module driven by a hydraulic cylinder which is an external hydraulic mechanism installed in the wing. 3. The method of claim 2,
N nozzles (N> 1 natural water) are connected and mounted in the resin chamber, and the cavity block has N cavities connected to the N nozzles,
The N nozzles each
A nozzle body, a temperature controlled heater, a nozzle housing, an air insulation layer, and connected to a gate,
And a mold module operative to transfer resin to respective cavities through the gate upon compressing the resin in the resin chamber. The method of claim 3,
By installing a valve in the portion where the resin is supplied to the resin chamber,
A mold module for controlling the resin to be delivered to the cavity by closing the valve when the resin is injected and opening the valve when the resin is compressed. The method of claim 3,
The mold module
A temperature sensor and a heater for controlling the temperature of the resin;
A top clamping plate fastening to the fixed side template of the injection machine to fix the mold module;
A top compression plate installed adjacent to the top clamping plate to form a sprue bush;
A bottom compression plate installed adjacent to the top compression plate to which the plunger is fastened;
Engage with the cavity plate to form a closed state of the mold module, separate from the cavity plate to form an open state of the mold module, and constitute a core, when the mold module is opened together with the cavity plate to the fixed side and the movable side A core plate forming a parting line (PL) that is divided and divided;
Guide bushings and guide pins for guiding the cavity plate and the core plate to be accurately aligned when the mold module is opened and closed;
A support pin for guiding positions of the top compression plate, the bottom compression plate, the cavity plate, and the core plate;
A bottom clamping plate fastening to the movable side template of the injection molding machine to support the mold module;
An ejector pin, which is a pin that pushes out the solidified product from the cavity after the mold module is opened;
An ejector plate installed with the ejector pins to help the product to be taken out;
A space block installed adjacent to the bottom clamping plate to provide a space in which the ejector pin can move;
An eject guide bush and a support pillar for guiding the ejector pins in a movable motion and distributing the force exerted by the core plate when the product is taken out;
A return pin, which is a pin that helps the ejector plate return to its original position after the ejector pin pushes the product out;
A parting pin (parting lock pin) that is a pin that serves to keep the cavity plate and the core plate engaged in the mold module closed state;
A stop bolt connecting the top clamping plate, the top compression plate, and the bottom compression plate to each other;
A puller bolt having a female screw to which the male bolt of the stop bolt is connected and guided to guide the movement of the cavity plate, and determining a maximum position of the cavity plate to move in the opening direction of the mold module;
Mold module containing more. 9. The method of claim 8,
The heater includes a band heater installed in a portion adjacent to the inlet of the sprue, and a heater surrounding the plunger to control the temperature,
The temperature sensor includes a thermocouple sensor, the mold module is installed at a plurality of points that require a temperature measurement. 9. The method of claim 8,
The volume of the resin chamber is varied by a plate spacing which is the distance between the bottom compression plate and the cavity plate, the maximum volume of the resin chamber is determined by the length of the puller bolt,
Before the resin is injected from the injection molding machine, the plate spacing is initialized according to the volume of the cavity to be filled, and the plate spacing is adjusted by the movable side movement of the mold module. Resin chambers of N1 (N1> natural water) temporarily storing molten resin supplied from an injection machine;
A drive mechanism for compressing and delivering the resin in the N1 resin chambers;
A nozzle connected to each of the N1 resin chambers and receiving a resin from the resin chamber and delivering the resin to a cavity which is a space where an injection molded product is formed;
A sprue which is a passage until the molten resin is supplied and branched from the injection machine;
A manifold for branching the resin supplied to the sprue N1 times;
N1 runners each of which is a passage connecting the resin branched N1 times from the manifold with the N1 resin chambers;
A cavity block that is a block forming a shape face of the cavity;
A cavity plate which is a plate to which the cavity block is fastened;
A plunger compressing the resin in the N1 resin chambers;
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N2 nozzles (N2> 1, N2≥N1 natural water) are connected to each of the N1 resin chambers so that a total of N1 × N2 nozzles are mounted, and the cavity block has a total of N1 connected to the N1 × N2 nozzles. × N2 cavities are formed,
The N1 resin chambers are cylinder-shaped molten resin holding spaces formed by being surrounded by the cavity plate, the cavity block, and the plunger, respectively.
The drive mechanism includes the cavity block and the plunger, compresses the resin by relative movement of the plunger and the cavity block,
While the resin is compressed by the relative movement of the plunger and the cavity block, the resin passes through the N1 × N2 nozzles and is transferred to the N1 × N2 cavities, respectively.
The N1 × N2 nozzles are each
A nozzle body, a temperature controlled heater, a nozzle housing, an air insulation layer, and connected to a gate,
And a mold module operative to transfer resin to respective cavities through the gate upon compressing the resin in the resin chamber. delete An injection machine, on which a mold module is mounted, for supplying resin to the mold module;
A resin chamber for temporarily storing molten resin supplied from the injection molding machine, a driving mechanism for compressing and delivering the resin in the resin chamber, and a cavity connected to the resin chamber to receive resin from the resin chamber and to form an injection molded product. A mold module including a nozzle for delivering;
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The mold module
A sprue which is a passage through which the molten resin from the injection machine is initially supplied to the mold module and connected to the resin chamber;
A cavity block that is a block forming a shape face of the cavity;
A cavity plate which is a plate to which the cavity block is fastened;
A plunger for compressing the resin in the resin chamber;
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The resin chamber is a cylinder-shaped molten resin holding space formed by being surrounded by the cavity plate, the cavity block, and the plunger,
The drive mechanism includes the cavity block and the plunger, and compresses the resin by relative movement of the plunger and the cavity block. 14. The method of claim 13,
An injection compression delivery molding apparatus which compresses the resin by the relative movement of the plunger and the cavity block, and simultaneously transmits the resin to the cavity through the nozzle. 14. The method of claim 13,
The mold module
Including a temperature sensor and a heater for controlling the temperature of the resin,
The heater includes a band heater installed in a portion adjacent to the inlet of the sprue, and a heater surrounding the plunger to control the temperature, the temperature sensor includes a thermocouple sensor and is installed at a plurality of points requiring temperature measurement,
The injector
A barrel including a hopper which is an inlet through which the resin is fed to the injection machine and an injection nozzle which is an outlet for feeding the resin into the mold module,
An injector band heater for surrounding the barrel and controlling the temperature;
A screw installed in the barrel and rotated;
A drive unit for rotating the screw;
Speed control means for controlling a speed of the drive unit;
An injector control panel for setting and controlling the injection speed and temperature of the resin;
/ RTI >
Injection compression transfer molding apparatus for controlling the injection speed and temperature of the resin supplied to the mold module through the injection nozzle to operate the speed control means and the injection band heater under the control of the injection machine control panel. 16. The method of claim 15,
Further comprising a temperature control unit for controlling the temperature of the resin using the temperature sensor and the heater,
The temperature control unit injection compression delivery molding apparatus for controlling the temperature of the resin passing through the sprue by controlling the band heater, the heater installed in the mold module. An injection compression transfer molding method using a mold module of claim 2 and an injection machine in which the mold module is mounted,
A first step of moving the movable side of the mold module to close the mold module and setting an initial position of the drive mechanism;
A second step of injecting resin into the resin chamber from the injection machine;
A third step of compressing the resin in the resin chamber by moving the drive mechanism by the clamping mechanism or the external hydraulic mechanism of the injection machine;
A fourth step of transferring resin to the cavity through the nozzle;
A fifth step in which the movement of the driving mechanism is finished and the filling of the cavity is completed;
A sixth step of completing solidification of the cavity-in resin and releasing the mold module;
Injection compression delivery molding method comprising a. 18. The method of claim 17,
And compressing the resin by the movement of the drive mechanism in the third step, and in the fourth step, the resin passes through the nozzle and is delivered to the cavity. 18. The method of claim 17,
The initial position setting of the drive mechanism of the first step is
By setting the initial volume of the resin chamber according to the volume of the cavity to be filled,
An injection compression delivery molding method in which the position of the drive mechanism is adjusted and set by the movable side movement of the mold module. 18. The method of claim 17,
Resin solidification of the sixth step
When the injected resin is a thermoplastic resin, it solidifies upon cooling of the resin,
When the injected resin is a thermoset resin (thermoset resin), it is solidified in accordance with the thermal curing of the injection injection molding method. An injection compression transfer molding method using a mold module of claim 8 and an injection machine in which the mold module is mounted,
A first step of moving the movable side of the mold module to close the mold module and setting an initial position of the plunger;
A second step of injecting resin into the resin chamber from the injection machine;
A third step of compressing the resin in the resin chamber by relatively moving the plunger and the cavity block by a mold clamping mechanism or an external hydraulic mechanism of the injection machine;
A fourth step of transferring resin to the cavity through the nozzle;
A fifth step of completing the relative movement of the plunger and the cavity block and completing the filling of the cavity;
A sixth step of completing cooling and solidifying the cavity-in resin and releasing the mold module;
Injection compression delivery molding method comprising a. 22. The method of claim 21,
And compressing the resin by the relative movement of the plunger and the cavity block in the third step, and in the fourth step, the resin passes through the nozzle and is delivered to the cavity. 22. The method of claim 21,
The volume of the resin chamber is varied by a plate spacing which is the distance between the bottom compression plate and the cavity plate, the maximum volume of the resin chamber is determined by the length of the puller bolt,
The initial position setting of the plunger of the first step,
By setting the initial volume of the resin chamber according to the volume of the cavity to be filled,
The injection compression delivery molding method which sets and adjusts the said board space | interval to the movable side movement of the said mold module.

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