CN212124248U

CN212124248U - Die set

Info

Publication number: CN212124248U
Application number: CN202020754341.9U
Authority: CN
Inventors: 张亚楠; 辛朝波; 安鹏; 谭艺蓓
Original assignee: Langfang Feize Composite Technology Co ltd
Current assignee: Langfang Feize Composite Technology Co ltd
Priority date: 2020-05-09
Filing date: 2020-05-09
Publication date: 2020-12-11
Anticipated expiration: 2030-05-09

Abstract

The application provides a mold, which comprises an upper mold body provided with a mold cavity; the upper die body of the die is provided with a sealing assembly and an air exhaust channel; the mold sealing assembly comprises a sealing strip; the mould sealing strip is arranged around the mould cavity of the mould; the mould air exhaust channel comprises a main channel communicated with the mould cavity and the outside and a sub-channel communicated with the main channel; a piston capable of sliding relatively is arranged in the main channel of the die. According to the technical scheme provided by the embodiment of the application, the on-off of the sub-channel and the main channel and the communication of the main channel and the die cavity are switched by sliding the piston, so that the vacuum-pumping operation of the die cavity can be ensured, and raw materials can be prevented from entering the main channel; the problem that the surface is uneven and not tight in sealing caused by the machining precision error of the die can be solved through the sealing strip, material leakage can be prevented, and the control on the vacuum degree of the die cavity can be improved.

Description

Die set

Technical Field

The application relates to the technical field of mold manufacturing, in particular to a mold.

Background

HP-RTM (high Pressure Resin Transfer molding) is an abbreviation for high Pressure Resin Transfer molding process. The method is a molding process for obtaining a composite material product by carrying out resin flow mold filling, impregnation, curing and demolding on the resin by utilizing high-pressure to carry out opposite-impact mixing on the resin and injecting the resin into a vacuum closed mold paved with a fiber reinforced material and a preset insert in advance.

The structure of the HP-RTM mold on the market at present is designed by following the traditional injection molding process, and a form of directly matching an upper mold steel template and a lower mold steel template is adopted, so that the structure has high requirement on the precision of machining equipment, the difficulty in mold matching is high, the sealing effect is poor, and material leakage is easy to occur; the vacuum port is easy to block and needs to be cleaned every time; therefore, it is not suitable for mass production.

Disclosure of Invention

In view of the above-mentioned drawbacks or deficiencies in the prior art, it would be desirable to provide a mold.

The application provides a mold, which comprises an upper mold body provided with a mold cavity; the upper die body of the die is provided with a sealing assembly and an air exhaust channel; the mold sealing assembly comprises a sealing strip; the mould sealing strip is arranged around the mould cavity of the mould; the mould air exhaust channel comprises a main channel communicated with the mould cavity and the outside and a sub-channel communicated with the main channel; a piston capable of sliding relatively is arranged in the main channel of the die.

Further, a dovetail groove for installing a mold sealing strip is arranged on the upper mold body of the mold; the die dovetail groove is positioned on the outer side of the die cavity of the die and is connected end to form an annular shape.

Further, the device also comprises a cylinder; the mould cylinder is fixedly arranged at one end of the mould main channel, which is far away from the mould cavity, and is connected with the mould piston through a piston rod.

Further, the mold piston is positioned at one end close to the mold cavity; the end face of the mold piston, which is far away from one side of the mold cylinder, is aligned with the inner wall of the mold cavity of the mold and used for plugging the main passage of the mold.

Further, the mould piston is positioned at one end close to the mould cylinder; the end face of the mould is positioned on one side of the butt joint port of the sub-channel and the main channel of the mould close to the cylinder of the mould.

Furthermore, one end of the mold subchannel far away from the main channel of the mold is connected with a vacuum-pumping device.

The application has the advantages and positive effects that:

according to the technical scheme, the pistons are matched with the T-shaped air exhaust channel, the sub-channels and the main channel can be switched to be on or off and the main channel and the die cavity can be switched to be communicated with each other by sliding the pistons according to process requirements, so that the die cavity can be ensured to be vacuumized, and raw materials can be prevented from entering the main channel to cause channel blockage; meanwhile, the sealing strip has certain elasticity and compression amount, and the sealing strip is compressed and deformed after the upper die and the lower die are closed tightly, so that the problem that the surface is uneven and not tight due to the machining precision error of the die can be fully solved, a good sealing effect is achieved, material leakage can be prevented, and the control on the vacuum degree of the die cavity can be improved.

Drawings

Fig. 1 is a schematic structural diagram of a mold provided in an embodiment of the present application;

fig. 2 is a schematic structural view of an air exhaust channel of a mold according to an embodiment of the present disclosure.

The text labels in the figures are represented as: 100-an upper mold body; 110-a sealing strip; 120-a main channel; 130-channel division; 140-a piston; 141-a cylinder; 200-mold cavity.

Detailed Description

The following detailed description of the present application is given for the purpose of enabling those skilled in the art to better understand the technical solutions of the present application, and the description in this section is only exemplary and explanatory, and should not be taken as limiting the scope of the present application in any way.

Referring to fig. 1 and 2, the present embodiment provides a mold, which includes an upper mold body 100 and a lower mold body 200, each having a mold cavity 200; the upper die body 100 is provided with a sealing assembly around the die cavity 200, the sealing assembly comprises a sealing strip 110, the sealing strip 110 has certain elasticity and compression amount, the sealing strip 110 is compressed and deformed after the upper die body 100 and the lower die body 200 are tightly closed, the problem of poor sealing caused by uneven surface caused by machining precision errors of the die can be fully solved, a good sealing effect is achieved, and material leakage is effectively prevented; the upper die body 100 is further provided with an air exhaust channel, and the air exhaust channel comprises a main channel 120 communicated with the die cavity 200 and the outside and a sub-channel 130 communicated with the main channel 120; the piston 140 is arranged in the main channel 120, the cylinder 141 connected with the piston 140 is arranged outside the main channel 120, and the cylinder 141 can control the piston 140 to slide along the radial direction of the main channel 120, so that the communication between the branch channel 130 and the main channel 120 and the communication between the main channel 120 and the mold cavity 200 are controlled, not only can the raw material be prevented from entering the main channel to cause blockage, but also the mold cavity 200 can be vacuumized through the branch channel 130.

In a preferred embodiment, the upper die body 100 is provided with a dovetail groove for installing the sealing strip 110, the dovetail groove is positioned outside the die cavity 200, and the head connection is annular; the bottom of the sealing strip 110 is provided with a raised boss which is clamped in the dovetail groove by elasticity, and the raised boss can not fall off under the action of gravity, does not need screws, pressing plates and the like for fixing, and is very convenient to disassemble and assemble.

In a preferred embodiment, the cylinder 141 is fixedly installed at an end of the main channel 120 away from the mold cavity 200, and is connected with the piston 140 through a piston rod; when the piston rod is completely extended out, the end surface of the piston 140 far away from the cylinder 141 is aligned with the inner wall of the die cavity 200, so that raw materials can be prevented from entering the main channel 120, and the surface of a product cannot be influenced; when the piston rod is fully contracted, the end surface of the piston 140 on the side far away from the cylinder 141 is positioned on the side, close to the cylinder 141, of the butt joint of the main channel 120 and the sub-channel 130, and a vacuum pumping device is ensured to be capable of pumping vacuum to the mold cavity 200 through the sub-channel 130.

The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. The foregoing is only a preferred embodiment of the present application, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes may be made without departing from the principle of the present invention, and the technical features described above may be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the invention in other contexts without modification may be viewed as within the scope of the present application.

Claims

1. A mould, characterized by comprising an upper mould body (100) provided with a mould cavity (200); the upper die body (100) is provided with a sealing assembly and an air exhaust channel; the sealing assembly comprises a sealing strip (110); the sealing strip (110) being arranged around the mould cavity (200); the air exhaust channel comprises a main channel for communicating the die cavity (200) with the outside and a branch channel (130) communicated with the main channel (120); a piston (140) capable of sliding relatively is arranged in the main channel (120).

2. The mold according to claim 1, characterized in that the upper mold body (100) is provided with a dovetail groove for mounting the sealing strip (110); the dovetail grooves are located on the outer side of the die cavity (200) and are connected end to form a ring shape.

3. The mold according to claim 1, further comprising a cylinder (141); the air cylinder (141) is fixedly arranged at one end, far away from the mold cavity (200), of the main channel (120) and is connected with the piston (140) through a piston rod.

4. The mold according to claim 3, characterized in that said piston (140) is located close to one end of said mold cavity (200); the end surface of the piston (140) on the side far away from the cylinder (141) is aligned with the inner wall of the mold cavity (200) and used for blocking the main channel (120).

5. Mould according to claim 4, characterized in that said piston (140) is located close to one end of said cylinder (141); the end face is positioned on one side of the butt joint of the branch channel (130) and the main channel (120) close to the cylinder (141).

6. A mould according to claim 3, characterized in that the end of the subchannel (130) remote from the main channel (120) is connected to a vacuum-pumping device.