Injection mold and injection molding equipment

Abstract

The utility model provides an injection mold and injection molding equipment. The injection mold comprises a front mold assembly and a rear mold assembly, the front mold assembly comprises a front mold core with an upper cavity and a front mold insert with a through hole, the front mold insert is embedded in the front mold core, and the upper cavity is communicated with the through hole; the rear mold assembly comprises a rear mold core with a lower cavity and a rear mold insert, the rear mold insert is embedded in the rear mold core and comprises an insert pin, an ejector sleeve push rod and an elastic piece, the insert pin penetrates through the ejector sleeve push rod, the elastic piece abuts against the end, away from the front mold core, of the ejector sleeve push rod, when the front mold core and the rear mold core are closed, an injection molding cavity is formed by the upper cavity and the lower cavity, and the ejector sleeve push rod extends into the injection molding cavity. The insert pin extends out of the ejector sleeve push rod and is inserted into the through hole. The injection mold is provided with the front mold insert with the through hole, when the mold is closed, the insert pin is inserted into the through hole, and the ejector sleeve push rod which is automatically pressed is arranged in a matched manner, so that no gap is left, the reliability is improved, and a micropore of a molded injection part is free of burrs.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding, in particular to an injection mold and injection molding equipment. Background Art

[0002] Injection molding is a method of producing industrial products. Molten plastic is injected into a plastic product mold under pressure, and various plastic parts are obtained by cooling and molding. The diameter of the micropores of the air flow nozzle is about 0.3MM, and the requirements for the micropores are extremely strict. At least under a 20x magnifying glass, the micropores cannot have any flash, and the consistency of the micropores is very high. The existing injection mold is equipped with a pin that extends into the cavity. After the molten plastic part fills the cavity during injection molding, it is cooled to form a plastic part, and micropores are formed at the location of the pin. However, the existing injection mold relies on the fluid properties of the molten plastic to fill the cavity where the pin is inserted, and the reliability is poor. The micropores of the molded plastic parts are prone to flash, which cannot meet the micropore requirements of the air flow nozzle. Utility Model Content

[0003] The utility model provides an injection mold and an injection molding device with good reliability in order to solve the technical problem that flashing is easy to occur in injection molding micropores of the existing injection mold.

[0004] The utility model provides an injection mold, comprising a front mold component and a rear mold component, the front mold component comprising a front mold core having an upper cavity and a front mold insert having a through hole, the front mold insert being embedded in the front mold core, the upper cavity and the through hole being interconnected; the rear mold component comprising a rear mold core having a lower cavity and a rear mold insert, the rear mold insert being embedded in the rear mold core, comprising an insert pin, a sleeve push rod and an elastic member, the insert pin passing through the sleeve push rod, the elastic member abutting against the sleeve push rod away from the end of the front mold core, when the front mold core and the rear mold core are molded together, the upper cavity and the lower cavity form an injection cavity, the sleeve push rod extends into the injection cavity, the insert pin extends out of the sleeve push rod and is inserted into the through hole.

[0005] In one embodiment, the front mold assembly further includes a front mold base, and the front mold core is embedded in the front mold base.

[0006] In one embodiment, the front mold base has an injection hole, the front mold core has an injection runner and a connecting groove, the rear mold core has a branch runner, the injection runner connects the injection hole with the branch runner, and the connecting groove connects the branch runner with the injection cavity.

[0007] In one embodiment, the upper cavity is disposed on the side of the front mold core facing the rear mold core, the front mold insert is disposed on the side of the upper cavity away from the rear mold core, and the lower cavity is disposed on the side of the rear mold core facing the front mold core.

[0008] In one embodiment, the rear mold insert comprises a sleeve base, and the elastic member is sandwiched between the sleeve base and the sleeve push rod.

[0009] In one embodiment, the rear mold assembly further includes a rear mold base and a rear mold fixing plate, the rear mold fixing plate is connected to the rear mold base, and the rear mold core is embedded in the rear mold fixing plate.

[0010] In one embodiment, the rear mold insert also includes a fixing rod, one end of which is fixed to the rear mold base, and the other end is embedded in the rear mold fixing plate, and a groove is provided corresponding to the sleeve base to clamp the edge of the sleeve base.

[0011] In one embodiment, the upper cavity is in the shape of a truncated cone, the lower cavity is in the shape of a cylinder, the inner diameter of the lower cavity is larger than the bottom diameter of the upper cavity, and the sleeve push rod has a conical head.

[0012] In one embodiment, the elastic member is a spring.

[0013] An injection molding device includes a micro injection molding machine and an injection mold. The micro injection molding machine quantitatively injects fluid plastic into the injection mold. The injection mold includes a front mold component and a rear mold component. The front mold component includes a front mold core with an upper cavity and a front mold insert with a through hole. The front mold insert is embedded in the front mold core, and the upper cavity and the through hole are interconnected; the rear mold component includes a rear mold core with a lower cavity and a rear mold insert. The rear mold insert is embedded in the rear mold core and includes an insert pin, a sleeve push rod and an elastic member. The insert pin passes through the sleeve push rod, and the elastic member abuts against the sleeve push rod away from the end of the front mold core. When the front mold core and the rear mold core are molded together, the upper cavity and the lower cavity form an injection cavity, the sleeve push rod extends into the injection cavity, and the insert pin extends out of the sleeve push rod and is inserted into the through hole.

[0014] Compared with the prior art, the injection mold of the utility model is provided with the front mold insert having the through hole. When the mold is closed, the insert pin is extended and extended and inserted into the through hole, and cooperates with the sleeve push rod which is automatically tightened, leaving no gap and having high reliability, so that the micropores of the molded injection molded part are free of burrs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the three-dimensional structural assembly of the injection mold provided by the utility model;

[0016] Figure 2 It is a schematic diagram of the three-dimensional structure of an air flow nozzle;

[0017] Figure 3 for Figure 1 A partial exploded perspective view and a partial enlarged view of the injection mold shown;

[0018] Figure 4 for Figure 1 A cross-sectional view and a partial enlarged view of the injection mold shown;

[0019] Figure 5 for Figure 4 A schematic diagram of the three-dimensional structure of the upper mold core shown;

[0020] Figure 6 for Figure 4 The three-dimensional structural diagram of the lower mold core is shown;

[0021] Figure 7 for Figure 4 Schematic diagram of the three-dimensional structure of the fixing rod shown. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] In the present invention, "plurality" refers to two or more, and it should be understood that when an element is referred to as "connected", "coupled", "matched", "attached", "fixed", etc. to another element, it can be directly connected to the other element, or there may be intervening factors. In contrast, when an element is referred to as "directly connected", "directly coupled", etc. to another element, there are no intermediate elements. Other words used to describe the relationship between elements should be interpreted in a similar manner (for example, "between" versus "directly between", "adjacent" versus "directly adjacent", etc.).

[0024] See also Figure 1 and Figure 2 ,in, Figure 1 The three-dimensional structural diagram of the injection mold provided by the utility model is as follows: Figure 2 The 3D structure diagram of an air flow nozzle is shown in FIG. 1. The injection mold 100 includes a front mold component 10 and a rear mold component 20, and is used for microporous products, such as an air flow nozzle 200 with micropores. The air flow nozzle 200 includes an integrally formed conical nozzle 201 and a ring platform 202, and the conical nozzle 201 has micropores 203.

[0025] Please refer to Figure 3 and Figure 4 ,in, Figure 3 for Figure 1 The partial exploded schematic diagram and partial enlarged diagram of the injection mold shown in the figure, Figure 4 for Figure 1 The cross-sectional view and partial enlarged view of the injection mold shown. The front mold assembly 10 includes a front mold base 11, a front mold core 13 with an upper mold cavity 131, and a front mold insert 15 with a through hole 151. The front mold core 13 is embedded in the front mold base 11, and the front mold insert 15 is embedded in the front mold core 13. The upper mold cavity 131 and the through hole 151 are mutually connected. The shape of the upper mold cavity 131 matches the shape of the conical nozzle 201 and is a truncated cone shape. The upper mold cavity 131 is arranged on the side of the front mold core 13 facing the rear mold assembly 20, and the front mold insert 15 is arranged on the side of the upper mold cavity 131 away from the rear mold assembly 20.

[0026] The rear mold assembly 20 includes a rear mold base 21, a rear mold fixing plate 22, a rear mold core 23 having a lower mold cavity 231, and a rear mold insert 25. The rear mold fixing plate 22 is connected to the rear mold base 21. The rear mold core 23 is embedded in the rear mold fixing plate 22. The shape of the lower mold cavity 231 matches the ring stage 202. The lower mold cavity 231 is cylindrical. The inner diameter of the lower mold cavity 231 is greater than the bottom diameter of the upper mold cavity 131. The rear mold insert 25 is embedded in the rear mold core 23. The upper mold cavity 131 is provided on the side of the front mold core 13 facing the rear mold core 23. The front mold insert 15 is provided on the side of the upper mold cavity 131 away from the rear mold core 23. The lower mold cavity 231 is provided on the side of the rear mold core 23 facing the front mold core 13. The rear mold insert 25 passes through the lower mold cavity 231.

[0027] The rear mold insert 25 includes an insert pin 251, a sleeve 253 and an elastic member 255. The insert pin 251 is embedded in the sleeve 253. The sleeve 253 includes a sleeve base 2531 and a sleeve push rod 2533. The insert pin 251 passes through the sleeve push rod 2533. The elastic member 255 is sandwiched between the sleeve base 2531 and the sleeve push rod 2533. When the front mold core 13 and the rear mold core 23 are molded together, the upper mold cavity 131 and the lower mold cavity 231 form an injection mold cavity. The sleeve push rod 2533 extends into the injection mold cavity and has a conical head to form the hollow structure of the air flow nozzle 200. The insert pin 251 is inserted into the through hole 151 to form the micropore 203. The diameter of the insert pin 251 is set according to the diameter of the micropore to be formed, for example, 0.3 mm.

[0028] The elastic member 255 may be made of an elastic material with good elasticity, and may specifically be a spring.

[0029] Please refer to Figure 4 , Figure 5 and Figure 6 ,in, Figure 5 for Figure 4The three-dimensional structure diagram of the upper mold core is shown in FIG. Figure 6 for Figure 4 The schematic diagram of the three-dimensional structure of the lower mold core is shown. The front mold base 11 has an injection hole 111, the front mold core 13 has an injection flow channel 132 and a connecting groove 134, and the rear mold core 23 has a branch flow channel 232. The injection flow channel 132 connects the injection hole 111 with the branch flow channel 232, and the connecting groove 134 connects the branch flow channel 232 with the injection cavity.

[0030] It can be understood that one upper cavity 131 corresponds to one lower cavity 231, one front mold insert 15 corresponds to one rear mold insert 25, one injection cavity injects one product, and when multiple injection cavities are provided, multiple products can be injected at the same time, and the number of the branch channels 232 corresponds to the number of the injection cavities to achieve injection molding.

[0031] The rear mold insert 25 also includes a fixing rod 257, one end of which is fixed to the rear mold base 21, and the other end is embedded in the rear mold core 23. A groove 2571 is provided corresponding to the sleeve base 2531 to clamp the edge of the sleeve base 2531. The number of the fixing rods 257 is multiple, such as two, three, etc. The groove 2571 of each fixing rod 257 cooperates to fix the sleeve base 2531. Specifically, when the number of the fixing rods 257 is two, they can be symmetrically arranged on both sides of the sleeve base 2531. When the number of the fixing rods 257 is three, they are arranged around the sleeve base 2531, such as Figure 7 shown.

[0032] When the injection mold 100 is closed for injection molding, the insert pin 251 is inserted into the through hole 151, and the fluid plastic is injected into the injection mold 100 from the injection hole 111, and sequentially passes through the branch channel 232 and the connecting groove 134 to the injection cavity. Due to the elastic effect of the elastic member 255, pressure is provided from the rear mold core 23 toward the front mold core 13, and the sleeve push rod 2533 automatically presses the fluid plastic without leaving any gap, so as to achieve the purpose of injection without flashing.

[0033] Compared with the prior art, the injection mold 100 of the utility model is provided with the front mold insert 15 having the through hole 151. When the mold is closed, the insert pin 251 is extended and extended, and inserted into the through hole 151, and cooperates with the sleeve push rod 2533 which is automatically tightened, leaving no gap and having high reliability, so that the microporous injection molded parts are free of burrs and the consistency is improved at the same time.

[0034] The utility model also provides an injection molding device, including an injection mold and a micro injection molding machine, wherein the micro injection molding machine quantitatively injects fluid plastic into the injection mold, and the injection mold adopts the above-mentioned injection mold 100. The injection molding device adopts a high-precision micro injection molding machine to ensure injection molding accuracy. Compared with the existing method of controlling the size of the injection molded part by the volume of the cavity itself, the elastic member 255 of the utility model is arranged between the sleeve base 2531 and the sleeve push rod 2533, and the volume of the injection molding cavity is elastic. Therefore, a high-precision micro injection molding machine is adopted to control the injection amount and improve the injection molding accuracy.

[0035] The above descriptions are only some embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the utility model specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An injection mold, characterized in that: include: A front mold assembly, comprising a front mold core having an upper mold cavity and a front mold insert having a through hole, wherein the front mold insert is embedded in the front mold core, and the upper mold cavity and the through hole are interconnected; The rear mold assembly includes a rear mold core having a lower mold cavity and a rear mold insert. The rear mold insert is embedded in the rear mold core and includes an insert pin, a sleeve push rod and an elastic member. The insert pin penetrates the sleeve push rod, and the elastic member abuts against the sleeve push rod at the end away from the front mold core. When the front mold core and the rear mold core are molded together, the upper mold cavity and the lower mold cavity form an injection molding cavity, the sleeve push rod extends into the injection molding cavity, and the insert pin extends out of the sleeve push rod and is inserted into the through hole.

2. The injection mold according to claim 1, characterized in that: The front mold assembly also includes a front mold base, and the front mold core is embedded in the front mold base.

3. The injection mold according to claim 2, characterized in that: The front mold base has an injection hole, the front mold core has an injection flow channel and a connecting groove, and the rear mold core has a branch flow channel. The injection flow channel connects the injection hole and the branch flow channel, and the connecting groove connects the branch flow channel and the injection cavity.

4. The injection mold according to claim 1, characterized in that: The upper cavity is arranged on the side of the front mold core facing the rear mold core, the front mold insert is arranged on the side of the upper cavity away from the rear mold core, and the lower cavity is arranged on the side of the rear mold core facing the front mold core.

5. The injection mold according to claim 1, characterized in that: The rear mold insert comprises a sleeve base, and the elastic member is sandwiched between the sleeve base and the sleeve push rod.

6. The injection mold according to claim 5, characterized in that: The rear mold assembly also includes a rear mold base and a rear mold fixing plate. The rear mold fixing plate is connected to the rear mold base, and the rear mold core is embedded in the rear mold fixing plate.

7. The injection mold according to claim 6, characterized in that: The rear mold insert also includes a fixing rod, one end of which is fixed to the rear mold base, and the other end is embedded in the rear mold core, and a groove is provided corresponding to the sleeve base to clamp the edge of the sleeve base.

8. The injection mold according to claim 1, characterized in that: The upper cavity is in the shape of a truncated cone, the lower cavity is in the shape of a cylinder, the inner diameter of the lower cavity is greater than the bottom diameter of the upper cavity, and the sleeve push rod has a conical head.

9. The injection mold according to claim 1, characterized in that: The elastic member is a spring.

10. An injection molding device, characterized in that: It comprises a micro injection molding machine and an injection mold, wherein the micro injection molding machine quantitatively injects fluid plastic into the injection mold, and the injection mold is the injection mold as described in any one of claims 1-9.

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