CN214820392U

CN214820392U - EPDM injection mold

Info

Publication number: CN214820392U
Application number: CN202120103392.XU
Authority: CN
Inventors: 郭维
Original assignee: Zhongshan City Tree Precision Mold Ltd
Current assignee: Zhongshan City Tree Precision Mold Ltd
Priority date: 2021-01-14
Filing date: 2021-01-14
Publication date: 2021-11-23
Anticipated expiration: 2031-01-14

Abstract

An EPDM injection mould comprises a panel, a cylinder plate, a runner plate, an A plate, a B plate and a bottom plate; a die cavity is formed between the plate A and the plate B; the panel is provided with an injection port and a first channel communicated with the injection port, the cylinder plate is provided with a needle valve communicated with the first channel, and the discharge end of the needle valve is communicated with the mold cavity so as to inject the rubber material into the mold cavity; the bottom plate is arranged below the B plate, EPDM rubber is injected into a cold runner system through a die sprue by adopting an injection process, and then is injected into a die cavity through a needle valve type cold nozzle, and the high-temperature vulcanization molding is carried out. The whole process is accurate, the repeatability precision is good, the product quality is stable, and the size precision is higher.

Description

EPDM injection mold

Technical Field

The utility model relates to a battery sealing washer field especially relates to an EPDM injection mold.

Background

The EPDM sealing ring is mainly used for sealing an automobile fuel cell, and the existing EPDM sealing ring product is mainly realized by adopting a processing mode of a flat vulcanizing machine and a solid mould pressing process, because the structure of the product is more complex and the requirement on the thickness dimensional tolerance of the product is high; the existing solid mould pressing process has many working procedures, only manual material discharging and up-down mould closing high-temperature vulcanization forming can be carried out, the forming time of each mould is very long, and the processing cost of products is very high. And the product processing efficiency is low, the material utilization rate is low, and a lot of materials are lost in each mould. In addition, the solid molding die has insufficient repeatability precision, large product size deviation and unstable quality. The solid molding dies are also not durable and will deform over time during production, requiring a new die to be opened.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the technical scheme provides the EPDM injection mold, the EPDM rubber material is injected into a cold runner system through a sprue bushing of the mold by adopting an injection process, and then is injected into a mold cavity through a needle valve type cold bushing, and the EPDM injection mold is vulcanized and molded at a high temperature. The whole process is accurate, the repeatability precision is good, the product quality is stable, and the size precision is higher.

In order to achieve the purpose, the technical scheme is as follows:

an EPDM injection mould comprises a panel, a cylinder plate, a runner plate, an A plate, a B plate and a bottom plate;

a die cavity is formed between the plate A and the plate B;

the panel is provided with an injection port and a first channel communicated with the injection port, the cylinder plate is provided with a needle valve communicated with the first channel, and the discharge end of the needle valve is communicated with the mold cavity so as to inject the rubber material into the mold cavity;

the bottom plate is arranged below the B plate.

In some embodiments, the needle valve comprises an inner cylinder communicated with the first channel, a sealing needle is arranged in the inner cylinder, a discharge hole which is conical and gradually becomes smaller towards the end is formed in the lower end of the inner cylinder, and the shape of the end of the sealing needle is matched with that of the discharge hole.

In some embodiments, the cylinder plate is provided with a plurality of chambers, a mounting part connected with the sealing needle is arranged in each chamber, and a second channel communicated with the chambers is arranged on one side of the panel.

In some embodiments, the needle valve further comprises an outer cylinder sleeved on the outer periphery of the inner cylinder, a gap is arranged between the outer cylinder and the inner cylinder, a through hole communicated with the gap is formed in the upper end face of the outer cylinder, and the runner plate is provided with a third channel communicated with the through hole and used for injecting chilled water.

In some embodiments, the first channel is an i-shaped channel.

In some embodiments, the runner plate is provided with an inclined channel, one end of the inclined channel is communicated with the first channel, and the other end of the inclined channel is communicated with the inner cylinder.

In some embodiments, the runner plate is provided with at least four cavities in which needle valves can be placed, and the needle valves are arranged on two cavities at opposite corners.

In some embodiments, the heat insulation plate and the backing plate are arranged between the runner plate and the A plate and between the B plate and the bottom plate.

The beneficial effect of this application does:

1. the EPDM injection mold adopts an injection process, so that the repeated precision is high, the product quality is stable, and the dimensional precision is good;

2. the mold does not need to be subjected to a large amount of glue overflow, so that the material is saved;

3. the mould does not need manual emptying, and has the advantages of fast vulcanization molding and high production efficiency.

4. The die is hardened and durable.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a first schematic cross-sectional view of an embodiment of the present invention (based on fig. 1);

FIG. 3 is a second schematic cross-sectional view of the embodiment of the present invention (based on FIG. 1, with the runner plate exploded);

fig. 4 is a schematic cross-sectional view of another side of an embodiment of the present invention;

FIG. 5 is an exploded cross-sectional view of a needle valve according to an embodiment of the present invention;

fig. 6 is an enlarged view of fig. 2 at a.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to further explain the present invention in detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1-6, an EPDM injection mold includes a face plate 1, a cylinder plate 2, a runner plate 3, an a plate 4, a B plate 5, and a bottom plate 6;

a die cavity 7 is formed between the A plate 4 and the B plate 5;

the panel 1 is provided with an injection port 8 and a first channel 9 communicated with the injection port 8, the cylinder plate 2 is provided with a needle valve 10 communicated with the first channel 9, and a discharge end of the needle valve 10 is communicated with the mold cavity 7 so as to inject rubber material into the mold cavity 7;

the bottom plate 6 is arranged below the B plate 5, the cylinder plate is opened and closed under the action of an external driving structure, and the EPDM material is injected into the mold cavity through a needle valve after passing through the injection port and the first channel to be subjected to high-temperature vulcanization molding.

In this embodiment, the needle valve 10 includes an inner cylinder 101 communicated with the first channel 9, a sealing needle 102 is arranged in the inner cylinder 101, a discharge hole 103 which is tapered and gradually becomes smaller toward the end portion is arranged at the lower end of the inner cylinder 101, the shape of the end portion of the sealing needle 102 is matched with the shape of the end portion, as shown in fig. 5, the pointed end portion of the sealing needle can be inserted into the discharge hole and contacts with the inner wall of the discharge hole, so that the hole is blocked, and needle sealing is realized.

In this embodiment, cylinder board 2 is equipped with a plurality of cavities 11, be equipped with in cavity 11 with installation department 12 that the needle 102 is connected seals, panel 1 one side be equipped with the second passageway 13 of cavity 11 intercommunication, the during operation, the sizing material enters into the inner tube, and the needle of sealing does not insert the discharge opening this moment in, the sizing material can follow the discharge opening and jets out, produces malleation atmospheric pressure or negative pressure atmospheric pressure in the second passageway and controls the injection volume with the speed that the needle of control seal moved forward back and forth.

In this embodiment, the needle valve 10 further includes an outer cylinder 104 sleeved on the outer periphery of the inner cylinder 101, a gap is provided between the outer cylinder 104 and the inner cylinder 101, a through hole 14 communicated with the gap is provided on the upper end surface of the outer cylinder 104, the runner plate 3 is provided with a third channel 15 communicated with the through hole 14 for injecting chilled water, as shown in fig. 3 and 4, the chilled water enters the gap between the outer cylinder and the inner cylinder through the third channel and the through hole, so that the overall cooling balance can be ensured, and the flow of the sizing material is stable and smooth.

In this embodiment, the first channel 9 is an i-shaped channel, two ends of the channel are communicated with a needle valve, and the glue flows onto the two needle valves respectively after entering from the injection port.

In this embodiment, the runner plate 3 is provided with an inclined channel 16, one end of the inclined channel 16 is communicated with the first channel 9, and the other end is communicated with the inner cylinder 101, so as to guide the rubber material.

In the present embodiment, the flow passage plate 3 is provided with at least four cavities 17 in which the needle valves 10 can be placed, and the needle valves 10 are arranged on two cavities 17 at opposite corners.

In the embodiment, the heat insulation plate 18 and the backing plate 19 are further included, and are arranged between the runner plate 3 and the a plate 4 and between the B plate 5 and the bottom plate 6.

The above description is only for the purpose of illustrating the preferred embodiments of the present application and is not intended to limit the scope of the present application, which is within the scope of the present application, except that the same or similar principles and basic structures as the present application may be used.

Claims

1. An EPDM injection mold, characterized in that: comprises a panel (1), a cylinder plate (2), a runner plate (3), an A plate (4), a B plate (5) and a bottom plate (6);

a die cavity (7) is formed between the plate A (4) and the plate B (5);

the panel (1) is provided with an injection port (8) and a first channel (9) communicated with the injection port (8), the cylinder plate (2) is provided with a needle valve (10) communicated with the first channel (9), and the discharge end of the needle valve (10) is communicated with the mold cavity (7) so as to inject the rubber material into the mold cavity (7);

the bottom plate (6) is arranged below the B plate (5).

2. An EPDM injection mold as set forth in claim 1, wherein: needle valve (10) include with inner tube (101) of first passageway (9) intercommunication, be equipped with in inner tube (101) and seal needle (102), inner tube (101) lower extreme is equipped with and is the toper and toward discharge opening (103) that the tip diminishes gradually, seal needle (102) tip shape rather than the phase-match.

3. An EPDM injection mold as set forth in claim 2, wherein: the air cylinder plate (2) is provided with a plurality of chambers (11), an installation part (12) connected with the sealing needle (102) is arranged in each chamber (11), and a second channel (13) communicated with the chambers (11) is arranged on one side of the panel (1).

4. An EPDM injection mould as claimed in claim 3, wherein: needle valve (10) still establish urceolus (104) at inner tube (101) periphery including the cover, urceolus (104) with be equipped with the space between inner tube (101), the up end of urceolus (104) be equipped with through-hole (14) of space intercommunication, runner plate (3) be equipped with through-hole (14) intercommunication is used for pouring into third passageway (15) of refrigerated water into.

5. An EPDM injection mold as set forth in claim 1, wherein: the first channel (9) is an I-shaped channel.

6. An EPDM injection mold as set forth in claim 2, wherein: the runner plate (3) is provided with an inclined channel (16), one end of the inclined channel (16) is communicated with the first channel (9), and the other end of the inclined channel is communicated with the inner barrel (101).

7. An EPDM injection mold as set forth in claim 6, wherein: the runner plate (3) is provided with at least four cavities (17) capable of containing the needle valves (10), and the needle valves (10) are arranged on two diagonal cavities (17).

8. An EPDM injection mold as set forth in claim 1, wherein: the heat insulation plate is characterized by further comprising a heat insulation plate (18) and a backing plate (19), wherein the heat insulation plate is arranged between the runner plate (3) and the plate A (4), and the heat insulation plate is further arranged between the plate B (5) and the bottom plate (6).