TWI769288B - Mold for injection molding and method of manufacturing polymer material component - Google Patents

Abstract

An injection molding mold includes a fixed side plate, a first plate, a first mold core, a movable side plate, a second plate, a machine member, a slider and a second mold core. The first plate is disposed in a first end direction of the fixed side plate, the second plate is disposed in a first end direction of the first plate, and the movable side plate is disposed in a first end direction of the second plate. The first mold core and second mold core are respectively disposed in the accommodating spaces of the first plate and the second plate. When the mold is closed, the first and second mold cores define the cavity, and the runner is defined between the first plate and the second plate. The runner is connected to the cavity. An accommodating space is disposed between the movable side plate and the second plate to set the machine member and the slider, and the slider is located between the machine member and the runner. When the mechanical member is actuated, the slider is interlocked with the mechanical member. A method for manufacturing a polymer material component is also provided.

Description

Injection molding die and method for manufacturing polymer material components

The present invention relates to a mold, and more particularly, to a mold for an injection molding process, and a method for manufacturing a polymer material element.

The use of injection molding machines with molds to make polymer components, such as optical lenses, has a long history. In the mold, according to the fixed position, the mold can be divided into both a fixed side mold and a movable side mold. When the molds of the fixed side mold and the movable side mold touch and combine with each other, the mold is in a closed state. At this time, the plastic raw material is heated and melted by the injection molding machine and then injected into the mold, so that the plastic raw material fills the mold cavity of the mold. Inside, after cooling, an optical element is formed.

In the conventional injection molding process, a compressible mold is used. The compressible mold can compress the space of the mold cavity by applying force to the mold plate after the mold is closed, thereby improving the quality of the finished product. Usually, the compression side of the compression mold (the side with the hydraulic cylinder) is located in the movable side mold, and the applicant encountered a technical difficulty when trying to set the compression side in the fixed side mold. The difficulty lies in the fact that the molten plastic enters the cavity through the vertical runners through the horizontal runners. With the compression of the cavity, the length of the vertical runner (such as the distance from the inlet of the gate bushing to the horizontal runner) will be reduced, and the vertical runner space will be reduced after compression. It will cause the molten plastic originally in the runner to have nowhere to go, which will affect the clamping of the mold, and cause the pressure in the mold cavity to be unstable, which will affect the quality of the finished product.

An example of the present invention provides an injection molding die, which is used in an injection molding machine. The injection molding die has a fixed side and a movable side. The injection molding die includes a fixed side fixing plate, a first template and a first mold core, which are arranged on the fixed side. The movable side fixing plate, the second template, the machine parts, the sliding block and the second mold core are arranged on the movable side. The fixed side fixing plate is installed on the fixed side mold plate of the injection molding machine, the first template is arranged in the direction of the first end of the fixed side fixing plate, the second template is arranged in the direction of the first end of the first template, and the movable side fixing plate is installed On the movable side mold plate of the injection molding machine and in the direction of the first end of the second mold plate. The first mold core and the second mold core are respectively arranged in the first accommodating space of the first template and the second accommodating space of the second template, and the top surface of the second template has a groove. . The second mold core defines a mold cavity, and a flow channel is defined between the first template and the groove of the second template, and the flow channel is communicated with the mold cavity. In addition, a third accommodating space is arranged between the movable side fixing plate and the second template for setting the mechanism and the slider, and the slider is located between the mechanism and the flow channel. When the mechanism is actuated, the slider and the mechanism are moved. Pieces linked.

Another example of the present invention provides an injection molding die, comprising a first plate with a first perforation, a second plate with a second perforation, a third plate with a third perforation, a fourth plate with a cavity, a bushing, Follower and telescopic mechanism. The second plate is disposed in the direction of the first end of the first plate, the first through holes correspond to the second through holes, and the bushing is disposed in the first through holes and the second through holes, wherein a first runner is defined in the sleeve. The third plate is arranged in the direction of the first end of the second plate, and a second runner and a mold cavity are defined between the second plate and the third plate, wherein the second runner is communicated with the third through hole of the third plate, and The cavity communicates with the first runner via the second runner. The fourth plate is arranged in the direction of the first end of the third plate, the third through holes correspond to the holes, and the follower and the telescopic mechanism are arranged in the third holes and the holes, wherein the follower is connected with the telescopic mechanism and has a linkage relationship.

Another example of the present invention provides a method for manufacturing a polymer material element, which includes the following steps: first, driving the movable side template to move toward the fixed side template, so that the movable side template is in contact with the fixed side template; then, inputting the flow state through the runner The polymer material reaches the defined cavity between the movable side template and the fixed side template; then, the follower set in the accommodating space of the movable side template is driven to move away from the runner. One surface is located in the runner; after that, the fluid polymer material in the cavity is cooled to form a polymer material element; finally, the movable side template is driven to move away from the fixed side template.

In one example of the present invention, a slider or a follower on the side of the movable side template is used, and the slider or the follower can move away from the horizontal flow channel as required, and cooperate with the compression stroke to generate the overflow space , so that the plastic in the runner can be transferred to the overflow space during the clamping and compression process. Improve the problem that the molten plastic has nowhere to go during compression, which affects the clamping of the mold and causes the pressure in the mold cavity to be unstable, which affects the quality of the finished product.

In order to make the above-mentioned and other objects, features and advantages of the present invention more obvious and easy to understand, the following specific embodiments are given and described in detail in conjunction with the accompanying drawings.

The foregoing and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of a preferred embodiment with reference to the drawings. The directional terms mentioned in the following embodiments, such as: up, down, left, right, front or rear, etc., are used to illustrate rather than limit the present invention.

In an example of the present invention, the injection mold is a mold that can be used in an injection molding machine. The injection mold is divided into two parts: a fixed side and a movable side according to its mobility in the process. In the injection molding process, the fixed side is essentially fixed on the fixed side mold plate of the injection molding machine, and the movable side is connected to the movable side mold plate of the injection molding machine, and the movable side is moved to open and close the mold.

The design of the injection molding die of the present invention will be described below. Please refer to FIGS. 1 to 3 , which are respectively schematic cross-sectional views of the injection molding mold of the first example of the present invention in a non-clamped state, before compression after clamping, and after clamping and compression. It should be noted that only the core part of the present invention is emphasized in the illustrations, and the existing structures of many injection molding dies, such as various rod bodies, ejector pins, etc., will not be described in detail. Referring to FIG. 1 , in one example, the injection mold 10 is a compression mold, and the injection mold 10 at least includes a fixed side fixing plate 12 , a template 14 , a template 16 , a template 18 , a gate bushing 20 , and a telescopic mechanism 22 , the follower 24 , the mold core (for example, called the first mold core) 26 , the mold core (for example, called the second mold core) 28 and the spring 30 .

In this example, the template 12 is a fixed side fixing plate, which is a rectangular steel plate with opposite top surfaces 121 and bottom surfaces 122. The fixed side fixing plate 12 has a through hole 123 (for example, a first through hole) in the middle, and the through hole 123 is formed by The accommodating hole 125a and the accommodating hole 125b are formed by communicating with each other. The accommodating hole 125a and the accommodating hole 125b are respectively a circular hole, wherein the accommodating hole 125a penetrates the top surface 121 and the accommodating hole 125b penetrates the bottom surface 122. The radius of the accommodating hole 125b is smaller than that of the accommodating hole. 125a, the receiving hole 125a cooperates with the receiving hole 125b to form a stepped hole, and the receiving hole 125a and the receiving hole 125b are arranged substantially concentrically.

In one example, the template 14 is a rectangular steel plate with opposite top surfaces 141 and bottom surfaces 142 . The template 14 has a through hole 143 (for example, called a second through hole) and a through hole 144 . The through holes 143 and 144 can be respectively various shapes of through holes. . However, in another example, the through holes 143 and 144 may be replaced by blind holes that do not penetrate. In this example, the through holes 143 and 144 are respectively a circular hole passing through the template 14 . The radius of the through hole 143 is the same as the radius of the receiving hole 125b. An accommodating space (for example, referred to as a first accommodating space) is defined in the through hole 144 . In this example, the size of the accommodating space of the through hole 144 is the same as that of the through hole 144 . The through hole 144 is adjacent to one side of the through hole 143 . In addition, the top surface 141 of the template 14 is provided with a plurality of cylindrical recesses 146 .

In this example, the template 16 is a rectangular steel plate with opposite top surfaces 161 and bottom surfaces 162 . The template 16 has a through hole 163 (for example, a third through hole) and another through hole 164 . The through hole 164 defines an accommodating space (for example, called a second accommodating space). In this example, the size of the accommodating space in the through hole 164 is the same as that of the through hole 164 . In this example, the through holes 163 and 164 are respectively a circular hole through the template 16 . However, in another example, the through holes 163 and 164 are not limited to a circular shape, and they can also be holes of various shapes. On the other hand, the through holes 163 and 164 may be replaced by blind holes that do not penetrate. In this example, the through hole 164 is adjacent to one side of the through hole 163 . Furthermore, the top surface 161 of the template 16 is provided with an elongated groove 165. The groove 165 can communicate with the through-hole 163 and the through-hole 164 at the same time to serve as a part of the horizontal runner when the mold is closed.

In this example, the template 18 is a rectangular steel plate with opposite top surfaces 181 and bottom surfaces 182 , and a hole 183 is formed in the middle of the template 18 , and the hole 183 defines an accommodating space 184 (for example, called a third accommodating space). . The holes 183 may be blind holes or through holes. In this example, the template 18 is a movable side fixing plate, and the holes 183 are blind holes. However, the present invention is not limited to this. When the template 18 is applied, it can refer to any template with corresponding structure and corresponding function among the movable side molds. Furthermore, in this example, the template 16 and the template 18 are separate templates. However, in another embodiment, the templates 16, 18 may refer to different parts of a single rectangular steel plate, that is, the templates 16, 18 may be integrally formed.

In this example, the gate bushing 20 includes a base 201 and an extension portion 202 formed by extending outward from the base 201 , wherein the base 201 and the extension portion 202 are respectively cylindrical, and the outer diameter of the base The outer diameter of the extension portion 202 and the shape of the extension portion 202 are matched with the receiving hole 125 b of the fixing side fixing plate 12 . In addition, the gate bushing 20 defines a runner 21 (for example, called a first runner) penetrating the base 201 and the extension portion 202 , and the runner 21 has an opening 211 .

In this example, the telescopic mechanism 22 can be a general pneumatic cylinder, an hydraulic cylinder, an electronically controlled telescopic mechanism, a connecting rod group or a spring or other telescopic mechanism, a mechanism or a combination thereof. The telescopic mechanism 22 can drive specific external elements through a mechanism 221 . According to circumstances, the aforementioned mechanism 221 may refer to, for example, a connecting rod, a transmission rod, a transmission shaft, various transmission mechanisms and other elements. In addition, the telescopic mechanism 22 can also be driven by any one of the templates 15 , 16 , 17 , 18 , and is driven by a transmission mechanism composed of a plurality of transmission parts such as a connecting rod group to drive a specific external component (such as a slider), and its telescopic action is consistent with the mold clamping or compression stroke or has a specific deceleration relationship. In this example, the telescopic mechanism 22 uses a hydraulic cylinder, and the hydraulic cylinder is connected with the external element 24 by a mechanism 221 , and in this example, the telescopic mechanism 22 and at least part of the mechanism is movably seated in cavity 183 . In this example, the aforementioned mechanism 221 in the hydraulic cylinder may be a transmission mechanism such as a rod or a connecting rod.

In this example, the follower 24 itself has no power, and needs to be actuated by an external force. In this example, the follower 24 is a slider. The follower 24 can be a cylinder or a cylinder made of other shapes of metal or other materials. In this example, the follower 24 is a metal cylinder and has a top surface 241 .

In this example, the outer contours of the mold cores 26 , 28 correspond to the perforations 144 , 164 . In this example, the mold cores 26 and 28 are substantially cylindrical metal blocks. One end of the mold cores 26 and 28 has a molding surface corresponding to the molding object, and the shape of the molding surface can be convex or concave or not according to requirements. regular shape.

In this example, the number of the springs 30 is plural, and the number corresponds to the number of the hole-shaped depressions 146 on the top surface 141 of the template 14 . In this example, the number of the springs 30 is at least four. The spring 30 can be replaced by a hydraulic cylinder when necessary.

As depicted in the embodiment of FIG. 1 , the fixed-side fixing plate 12 and the template 14 are disposed on the fixed-side portion of the injection molding die 10 , wherein the fixed-side fixing plate 12 is installed on the fixed-side mold plate of the injection molding machine; As shown in 1, the first end direction of the fixed side fixing plate 12 is connected to the template 14 through a plurality of springs 30. A plurality of springs 30 embedded in the recesses 146 of the template 14 . The above-mentioned lower part refers to the relative lower part in the drawings, but the mold can be applied at various angles during application, and generally, the template 12 and the template 18 are arranged in the left and right directions during application. Furthermore, the receiving holes 125 b of the through holes 123 of the fixing side fixing plate 12 correspond to the through holes 143 of the template 14 .

As depicted in the embodiment of FIG. 1 , the gate bushing 20 is disposed in the through holes 123 and 143 , wherein the base 201 of the gate bushing 20 is located in the receiving hole 125 a , and the extension portion 202 of the gate bushing 20 is located in the receiving hole 125 a. Located in the receiving hole 125 b and the through hole 143 , the runner 21 of the gate bushing 20 is perpendicular to the fixed side fixing plate 12 and the template 14 and is longitudinal. The extension portion 202 is not completely penetrated into the entire hole 143 , that is, a certain distance is reserved between the bottom end of the extension portion 20 and the bottom surface 142 of the template 14 . In this example, the template 14 and the fixed side fixing plate 12 are directly connected via the spring 30, but in practical application, each template (eg, the template 14 and the fixed side fixing plate 12) may further include one or more templates. or other components.

Continuing the above description, the template 18 and the template 16 are arranged on the movable side part of the mold, wherein the template 18 is installed on the movable side plate of the injection molding machine, and the template 18 is directly or indirectly connected to the side of the template 18 away from the movable side plate. , the template 16 and the template 18 are located in the direction of the first end of the template 14 in sequence, that is, the template 16 is located below the template 14 and the template 18 is located below the template 16 . The through holes 164 of the template 16 are opposite to the through holes 144 of the template 14, so that the mold cores 26 and the mold cores 28 are disposed in the through holes 144 and 164, respectively.

The hole 183 of the template 18 is communicated with the through hole 163 of the template 16, and a telescopic mechanism 22 is arranged in the hole 183. Driven by the telescopic mechanism 22 , the through hole 163 moves up and down along the through hole 163 . That is, the follower 24 has a linkage relationship with the part of the telescopic mechanism 22 .

When clamping the mold, the mold plate 18 can be driven by an external power machine (not shown in this figure), such as a hydraulic cylinder or an electric motor, so that the mold plate 16 moves in the direction of the mold plate 14, so that the mold plate 16 and the The template 14 is connected to close the mold. Wherein, as shown in FIG. 2, after the mold is closed and before compression, the bottom surface 142 of the template 14 and the top surface 161 of the template 16 are in contact, a mold cavity 29 is defined between the mold core 26 and the mold core 28, and the bottom surface of the template 14 is 142 and the groove 165 form a horizontal runner 23 (for example, called the second runner, runner), the horizontal runner 23 communicates with the longitudinal runner 21, and the cavity 29 communicates with the runner 21 through the runner 23 Connected, and the runner 23 is also communicated with the through hole 163 of the template 16, wherein a compression space 32 is reserved between the bottom end of the gate bushing 20 and the runner 23, and the telescopic mechanism 22 is used to control the top of the follower 24. The surface 241 is located in the runner 23 , for example the top surface 241 of the follower 24 is flush with the bottom surface of the runner 23 .

As shown in FIG. 2, after the mold is closed and before compression, the injected fluid polymer material, such as molten plastic, flows into the cavity 29 through the runner 21 and runner 23, and a predetermined amount of molten plastic is injected. Afterwards, a portion of the plastic 60 (shown in FIG. 3 ) exists in the compression space 32 and the runner 23 . As shown in FIG. 3 , the template 18 is further forced to apply pressure in the direction of the fixed side fixing plate 12 , so that the spring 30 is pushed by the template 16 and the template 14 to present a compressed state. While compressing, in this example, the telescopic mechanism The hydraulic cylinder of 22 can control the follower 24 to move in the direction away from the runner 23 according to the control signal preset in a control unit (for example, an electronic control element such as a microprocessor or a control circuit), which is provided in the through hole 163 A flash space 34 . The die cavity 29 becomes smaller because the die plate 16 is pressed against the die plate 14 , and the compression space 32 (shown in FIG. 2 ) originally reserved at the bottom end of the gate bushing 20 and the space for the runner 23 are both due to Compression decreases, and due to the immobilization of the gate bushing 20 , part of the compression space 32 and the sprue 23 gradually harden and transfer to the overflow space 34 . In this example, the action of the telescopic mechanism 22 to the follower 24 is performed by a control signal, and the control signal is optional, for example, calculated from the real-time measured pressure in the runner 23, or It is performed according to a preset operation mode regardless of the instantaneous pressure in the runner 23 . In this way, the molten plastic has nowhere to go during compression, which affects the clamping of the mold and causes the pressure in the mold cavity to be unstable, which affects the quality of the finished product.

4 and FIG. 5 are schematic cross-sectional views of the injection molding mold of the second example of the present invention before and after mold clamping and after compression, respectively. As shown in FIGS. 4 and 5 , the injection molding mold 40 of the second example is The difference from the injection molding die 10 of the first example is that the slider 42 and the spring 44 of the second example replace the telescopic mechanism 22 and the follower 24 of the first example. As shown in FIG. 4 , the slider 42 is composed of two cylinders 42a and 42b with different outer diameters. The outer diameter of the upper cylinder 42a is smaller than that of the lower cylinder 42b, and the outer diameter of the cylinder 42a is smaller than that of the lower cylinder 42b. Corresponding to the through holes 163 of the template 16 , other structures and components of the injection molding die 40 are the same as or similar to those of the injection molding die 10 , and will not be repeated here.

As shown in FIG. 4 , the spring 44 is disposed at the bottom of the accommodating space 184 of the hole 183 of the template 18 , and the slider 42 is movably disposed in the accommodating space 184 above the spring 44 and the through hole 163 of the template 16 . In one example, The bottom surface of the cylinder 42b with the larger outer diameter is against the spring 40, and the cylinder 42a with the smaller outer diameter is located in the through hole 163. When the mold is closed and not compressed, the top surface 421a of the cylinder 42a is located in the runner 23, such as a cylinder The top surface 421a of the body 42a is flush with the bottom surface of the runner 23 .

As shown in FIG. 5 , when the template 18 is further forced to apply pressure in the direction of the fixing plate 12 on the fixed side, the template 16 is subjected to the pressure and closes in the direction of the template 14, so that the mold cavity 29 becomes smaller, and the bottom end of the gate bushing 20 originally The reserved compression space 32 (shown in FIG. 4 ) and the space of the runner 23 are both reduced due to compression. Since the gate bushing 20 is fixed, but the slider 42 is movable, part of it remains in the compression space 32 and the gradually hardened plastic 60 in the runner 23 can be squeezed in the direction of the slider 42, and the slider 42 thus slides in the direction away from the runner 23 and compresses the spring 44, wherein the part of the through hole 163 where the slider 42 was originally located is. The space will act as the overflow space 34 for the plastic 60 transfer. The sliding distance of the slider 42 can be controlled by placing springs 44 with different spring coefficients, so as to achieve the effect of adjusting the size of the overflow space 34 . That is, the actuation or the actuation stroke of the slider 42 is directly related to the instantaneous pressure in the runner 23 . That is, the greater the pressure, the farther the movement stroke of the slider 42 is.

6 and 7 are respectively schematic cross-sectional views of the injection molding mold of the third example of the present invention before and after compression after mold clamping, the injection molding mold 50 of the third example and the injection molding mold 40 of the second example. The difference is in the setting position of the slider and spring. As shown in FIG. 6 , the injection molding die 50 at least includes the fixed side fixing plate 12 , the die plate 14 , the die plate 16A, the die plate 18A, the gate bushing 20 , the slider 42 , the spring 44 , the die core 26 , the die core 28 and the spring 30 , wherein the fixed side fixing plate 12 , the template 14 , the gate bushing 20 , the slider 42 , the spring 44 , the mold core 26 , the mold core 28 and the spring 30 are the same as or similar to the injection molding die 10 or the injection molding die 40 , here No longer.

As shown in FIG. 6 , the template 16A is a rectangular steel plate with opposite top surfaces 161 and bottom surfaces 162 . The template 16 has through holes 164 , grooves 165 and accommodating grooves 166 , and the through holes 164 are formed by a circular hole passing through the template 16A. For placing the mold core 28, so that the mold core 28 and the mold core 26 form the mold cavity 29 when the mold is closed; the groove 165 is formed on the top surface 161 of the template 16 and communicates with the mold cavity 29; The accommodating groove 166 is formed in the template 16 The top surface 161 is connected to the groove 165.

In one example, the template 18A is a rectangular steel plate, with a top surface 181 and a bottom surface 182 opposite to each other.

In one example, the sliding block 42 and the spring 44 are disposed in the accommodating groove 166 , wherein the sliding block 42 can slide horizontally in the accommodating groove 166 in a direction parallel to the runner 23 , and one side of the sliding block 42 is located in the runner 23 . , the other side of the slider 42 is against the spring 44 .

As shown in FIG. 7 , when the template 18A is further forced to exert pressure in the direction of the fixed side fixing plate 12 , part of the gradually hardened plastic 60 remaining in the compression space 32 and the runner 23 can be squeezed in the direction of the slider 42 . The 42 thus slides sideways away from the runner 23 and compresses the spring 44, wherein the space of the part of the accommodating groove 166 where the slider 42 was originally located will serve as the overflow space 34 for the plastic 60 to be transferred. The size of the overflow space 34 can be adjusted by placing springs 44 with different spring coefficients to control the sliding distance of the slider 42 .

8 is a schematic flow chart of a method for manufacturing a polymer material element according to an example of the present invention. The method for manufacturing a polymer material element in this example is completed by the injection molding die shown in FIGS. 1 to 7 . As shown in FIG. 8, the method of manufacturing a polymer material element of this example includes the following steps. First, as shown in step S1, the template 18 and the template 16 (the two are combined, for example, called the movable side template) are driven to move toward the fixed side fixed plate 12 and the template 14 (the two are combined, for example, called the fixed side template), In order to make the movable side template contact with the fixed side template, the mold is in the clamping state; then, as shown in step S2, the fluid polymer material is injected into the mold between the movable side template and the fixed side template through the runners 21 and 23. The cavity 29, in one example, the fluid polymer material is molten plastic; then, as shown in step S3, the follower 24 in the accommodating space 184 of the movable side template is further driven to move away from the runner 23, wherein the follower One surface of the member 24 is located in the runner 23. In the first example, the driven member 24 is controlled by the telescopic mechanism 22 to move; then, as shown in FIG. Then, as shown in step S5, the movable side template is driven to move in the direction of the fixed side template; and the telescopic mechanism 22 can simultaneously or later actuate the follower 24 to the position that can originally contact the runner 23. For example, the telescopic mechanism 22 drives the follower 24 to move in the direction of the runner, so that the top surface 241 of the follower 24 is flush with the runner 23, so that the next cycle can be performed.

To sum up the above, under the structural design of an example of the injection molding die of the present invention, due to the setting of the flash space, the gradually hardened plastic in the runner can be transferred to the flash space. In this way, during the compression stroke, the molten plastic originally in the runner has nowhere to go, which affects the clamping of the mold, and causes the pressure in the mold cavity to be unstable, which affects the quality of the finished product.

Although the present invention has been disclosed as above with examples, it is not intended to limit the present invention. Those with ordinary knowledge in the technical field to which the present invention pertains can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be determined by the scope of the appended patent application.

10, 40, 50‧‧‧Injection molding die 12‧‧‧Fixed side fixing plate 121, 141, 161, 181, 241, 421a‧‧‧Top surface 122, 142, 162, 182‧‧‧Bottom surface 123, 143, 163‧‧‧Perforations 125a, 125b‧‧‧Accommodating holes 14, 16‧‧‧Templates 144, 164‧‧‧Perforations 165‧‧‧Grooves 146‧‧‧Depression 166‧‧‧Accommodating grooves 18‧‧‧Templates 183‧‧‧Hole 184‧‧‧Accommodating space 20‧‧‧Sprue bushing 201‧‧‧Base 202‧‧‧Extension 21, 23‧‧‧Sprue 211‧‧‧Opening 22‧‧‧Telescopic Mechanism 221‧‧‧Mechanism 24‧‧‧Followers 26, 28‧‧‧Mold core 29‧‧‧Cavity 30‧‧‧Spring 32‧‧‧Compression space 34‧‧‧Overflow space 42‧‧‧ Slider 42a, 42b‧‧‧Cylinder 44‧‧‧Spring 60‧‧‧plastic

FIG. 1 is a schematic cross-sectional view of the injection mold of the first example of the present invention before mold clamping. 2 is a schematic cross-sectional view of the injection mold of the first example of the present invention after mold clamping and before compression. 3 is a schematic cross-sectional view of the injection mold of the first example of the present invention after mold clamping and compression. 4 is a schematic cross-sectional view of the injection mold of the second example of the present invention after mold clamping and before compression. 5 is a schematic cross-sectional view of the injection mold of the second example of the present invention after mold clamping and compression. 6 is a schematic cross-sectional view of the injection mold of the third example of the present invention after mold clamping and before compression. 7 is a schematic cross-sectional view of the injection mold of the third example of the present invention after mold clamping and compression. FIG. 8 is a schematic flow chart of a method for manufacturing a polymer material device according to an example of the present invention.

10‧‧‧Injection Molding

12‧‧‧Fixed side fixing plate

163‧‧‧Perforation

14, 16, 18‧‧‧Template

20‧‧‧Gate bushing

21, 23‧‧‧runner

22‧‧‧Telescopic mechanism

221‧‧‧Parts

24‧‧‧Followers

29‧‧‧Cavity

30‧‧‧Spring

34‧‧‧Overflow space

60‧‧‧plastic

Claims (10)

An injection molding mold, comprising in sequence: a fixing side fixing plate, a first template, a second template and a third template; wherein the fixing side fixing plate is provided with an opening; the first template is provided with a first container a second accommodating space is set in the second template; a third accommodating space is set in the third template; the injection molding mold further includes: a first mold core, which can be placed in the first accommodating space a second mold core, which can be placed in the second accommodating space; a machine part, which can be movably placed in the third accommodating space; and a slider, which can be placed in the machine part and the first The channels can be linked with the machine; wherein, during placement, a mold cavity is defined between the first mold core and the second mold core, and the flow channel is defined between the first template and the second template , the flow channel communicates with the cavity and the opening; wherein, the injection molding mold is a compression injection molding mold, and the slider can move away from the flow channel when a fluid polymer material is accommodated in the flow channel. direction to increase the volume of the runner. The injection molding die as described in claim 1, wherein the component is a spring. The injection molding die described in claim 1 of the scope of the application further comprises a telescopic mechanism disposed in the third accommodating space, and the telescopic mechanism can drive the sliding block by the mechanism. An injection molding die, comprising a first plate, a second plate, a third plate and a fourth plate in sequence: the first plate is provided with a first through hole; The second plate is provided with a second perforation; the third plate is provided with a third perforation; the fourth plate is provided with a hole; A first runner is defined; a follower can be arranged in the third through hole and the hole; and a telescopic mechanism is connected with the follower; wherein, in the placement state, the second plate and the first A second runner and a cavity are defined between the three plates. The cavity communicates with the first runner through the second runner, the third through hole communicates with the second runner, and one of the driven members The surface is located in the second runner, wherein the follower can move away from the second runner to increase the volume of the second runner when a fluid polymer material is accommodated in the second runner ; Wherein, the injection molding die is a compression injection molding die. The injection molding die as described in claim 4, wherein the first plate is a fixed side fixing plate, the second plate is a first template, the third plate is a second template, and the fourth plate It is a third template, the third template is provided with a third accommodating space, the follower is a slider, the telescopic mechanism is connected with the follower by a mechanism, the first plate and the second The board is set on a fixed side; the third board and the fourth board are set on a movable side. Any one of the injection molding molds described in claim 3 or claim 5 further comprises a plurality of springs, and the plurality of springs are respectively connected to the first template and the second template. According to any one of the injection molding molds described in item 3 or item 5 of the scope of the patent application, wherein the telescopic mechanism comprises a hydraulic cylinder, the hydraulic cylinder is connected with the slider by the mechanism, and the machine Pieces are one rod. According to any one of the injection molding molds described in item 3 or item 5 of the patent application scope, wherein the telescopic mechanism comprises a connecting rod group, the connecting rod group is connected with the sliding block by the mechanical part, and the machine The component is a connecting rod, and the connecting rod group is linked with the third template or the second template. According to any one of the injection molding molds described in claim 3 or claim 5, wherein the sliding block can be driven by the telescopic mechanism to slide in the third accommodating space. A method of manufacturing a polymer material element, comprising the steps of: driving a movable side template to move to a fixed side template, so that the movable side template is in contact with the fixed side template; A flow of polymer material is fed into the cavity between the runners through a runner; when the flow polymer material is accommodated in the runner, a follower in the accommodating space of the movable side template is moved away from the runner. The direction of the runner is moved to increase the volume of the runner, and a surface of the follower is located in the runner; the fluid polymer material in the cavity is cooled to form a polymer material element; and the movable side template is driven to move toward Move away from the stationary side template.

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