Production process of rubber air bag and rubber air bag

Abstract

The invention provides a production process of a rubber air bag and the rubber air bag. A production technology of a rubber air bag comprises the following steps that S1, a first rubber sheet and a second rubber sheet which are symmetrical are machined through vulcanization, the opposite faces of the first rubber sheet and the second rubber sheet are bonding faces, and an air bag cavity is formed in the middle of each bonding face; s2, carrying out surface polishing treatment on the bonding surface after vulcanization; s3, a metal frame is machined, vent holes leading from the outside to the inside are formed in the metal frame, then sand blasting and degreasing phosphating treatment are conducted on the metal frame, and then the metal frame is coated with rubber hot vulcanized rubber; s4, processing a rubber strip frame corresponding to the bonding surface in shape; and S5, finally, the first rubber sheet, the rubber strip frame, the glued metal frame, the rubber strip frame and the second rubber sheet are stacked together in sequence and placed in a mold to be subjected to mold pressing vulcanization forming. A segmented vulcanization mode is adopted, the process is simple and convenient, and test verification proves that the rubber air bag can be prevented from being degummed and torn under the condition that the air bag is inflated for 1 MPa.

Description

Technical Field

[0001] The present invention relates to the technical field of battery processing equipment, and in particular to a production process of a rubber airbag and the rubber airbag. Background Art

[0002] During the critical lithium battery production processes of formation and capacity grading, battery charging and discharging are accompanied by electrochemical reactions that generate gas, which causes battery expansion, thereby affecting battery capacity and cycle life. Therefore, a clamp is required to restrain the battery. A key component of this clamp is the airbag composite.

[0003] Traditional airbags generally adopt a one-time molding and vulcanization method, specifically: a mold core is placed in the middle hollow position of the airbag. However, the airbag product only has a very small diameter vent hole and a large cavity, so the buried core method cannot normally remove the core to ensure the hollow structure. Summary of the Invention

[0004] The present invention provides a production process for a rubber airbag and the rubber airbag, which solves the defects of the existing airbags generally adopting a one-time molding and vulcanization method, which is difficult to process and difficult to remove the mold core.

[0005] The technical solution of the present invention is achieved as follows:

[0006] The present invention first proposes a production process for a rubber airbag, comprising the following steps:

[0007] S1: First, a symmetrical first rubber sheet and a second rubber sheet are formed by vulcanization. The opposing surfaces of the first rubber sheet and the second rubber sheet serve as bonding surfaces, and an airbag cavity is formed in the middle of the bonding surfaces.

[0008] S2: After vulcanization, the bonding surface is polished to remove the dense vulcanized layer on the bonding surface and roughen the bonding surface to increase the strength of subsequent bonding;

[0009] S3: Processing a metal frame to be placed between the first rubber sheet and the second rubber sheet, wherein the outer frame of the metal frame corresponds to the shape of the bonding surface, and the metal frame is provided with ventilation holes from the outside to the inside. Then, the metal frame is sandblasted, and the surface of the metal frame is degreased and phosphated. Finally, rubber hot-vulcanized adhesive is applied to the surfaces of the metal frame opposite to the two bonding surfaces.

[0010] S4: Processing a strip frame corresponding to the shape of the bonding surface;

[0011] S5: Finally, the first rubber sheet, the rubber strip frame, the rubber-coated metal frame, the rubber strip frame and the second rubber sheet are stacked together in sequence, and placed in a mold for compression vulcanization to form a rubber airbag. The outer periphery of the rubber airbag has an avoidance opening for avoiding the vent hole.

[0012] Preferably, in step S1, the degree of vulcanization is 80% of the normal vulcanization time.

[0013] Preferably, at least one reinforcement bar for increasing strength is fixedly connected to the metal frame. Specifically, the reinforcement bar can be a transverse reinforcement bar, a longitudinal reinforcement bar, a cross reinforcement bar, a well-shaped reinforcement bar, or a V-shaped reinforcement bar.

[0014] Preferably, a metal tube is fixed on the metal frame, the middle of the metal tube is a vent hole, and a metal tube groove that matches the metal tube is opened on the bonding surface of the first rubber and the second rubber.

[0015] Preferably, the production process of the rubber strip frame is to first press out a rubber sheet of a specified thickness through an open mill or a tablet press, and then cut out the rubber strip frame of a specified size through a punching die.

[0016] Preferably, the first rubber and the second rubber are both rectangular, the metal frame is rectangular, and the rubber strip frame is rectangular.

[0017] The present invention further proposes a rubber airbag, which is prepared by the above-mentioned production process of the rubber airbag.

[0018] Beneficial effects of the present invention:

[0019] 1. The production process of rubber airbags adopts a segmented vulcanization method. The airbag cavity in the rubber airbag does not need to be formed by placing a mold core. The first rubber and the second rubber that have been formed are laid on the metal frame in an integrated molding method. On the basis of ensuring the simplicity and feasibility of the process, an airbag product with a hollow cavity can be produced.

[0020] 2. The production process of the rubber airbag is to stack the first rubber sheet, the rubber strip frame, the rubber-coated metal frame, the rubber strip frame and the second rubber sheet together, place them in a mold for compression vulcanization, which can best ensure the bonding performance between the metal frame and the rubber strip frame, and between the rubber strip frame and the first rubber sheet and the second rubber sheet.

[0021] 3. Fill the processed rubber airbag with pressurized air. Tests have shown that the rubber airbag can be inflated to 1MPa without debonding or tearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is a schematic structural diagram of a rubber airbag in the present invention;

[0024] Figure 2 This is an exploded view of a rubber airbag in the present invention.

[0025] In the figure: 1-first rubber, 2-second rubber, 3-metal frame, 4-rubber strip frame, 5-metal tube, 6-vent, 7-adhesive surface, 8-airbag cavity, 9-metal tube groove, 10 reinforcement strip. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] Example 1

[0028] Reference Figure 1 and 2 , a production process of a rubber airbag, comprising the following steps:

[0029] S1: First, a symmetrical first rubber sheet 1 and a second rubber sheet 2 are formed by vulcanization. The opposing surfaces of the first rubber sheet 1 and the second rubber sheet 2 serve as an adhesive surface 7. An airbag cavity 8 is formed in the middle of the adhesive surface 7.

[0030] S2: After vulcanization, the bonding surface 7 is subjected to surface grinding treatment to remove the dense vulcanized layer on the bonding surface and roughen the bonding surface to increase the strength of subsequent bonding;

[0031] S3: A metal frame 3 is formed and placed between the first rubber sheet 1 and the second rubber sheet 2. The outer frame of the metal frame 3 corresponds to the shape of the bonding surface 7. A vent hole 6 is formed on the metal frame 3, leading from the outside to the inside. The metal frame 3 is then sandblasted and the surface of the metal frame 3 is degreased and phosphated. Finally, the surfaces of the metal frame 3 opposite to the two bonding surfaces 7 are coated with a rubber hot-vulcanized adhesive.

[0032] S4: Processing a strip frame 4 corresponding to the shape of the adhesive surface 7;

[0033] S5: Finally, the first rubber sheet 1, the rubber strip frame 4, the glue-coated metal frame 3, the rubber strip frame 4 and the second rubber sheet 2 are stacked together in sequence, placed in a mold for compression vulcanization, and formed into a rubber airbag. The outer periphery of the rubber airbag has a avoidance opening for avoiding the vent hole.

[0034] Preferably, in step S1, the degree of vulcanization is 80% of the normal vulcanization time.

[0035] Preferably, at least one reinforcement bar 10 is fixedly connected to the metal frame 3 to increase strength. Specifically, the reinforcement bar 10 can be a horizontal reinforcement bar, a vertical reinforcement bar, a cross reinforcement bar, a cross-shaped reinforcement bar, or a "F"-shaped reinforcement bar. Of course, it can also be an inclined reinforcement bar or a reinforcement bar of other shapes as needed, as long as the strength of the metal frame 3 is enhanced.

[0036] Preferably, a metal tube 5 is fixed on the metal frame 3 , the middle of the metal tube is a vent hole 6 , and a metal tube groove 9 that matches the metal tube 5 is opened on the bonding surface of the first rubber sheet 1 and the second rubber sheet 2 .

[0037] Preferably, the production process of the strip frame 4 is to first press out a film of a specified thickness through an open mill or a tablet press, and then cut out the strip frame of a specified size through a punching die. Of course, this is only one of the methods, and the strip frame can also be processed through other methods.

[0038] Preferably, the first rubber sheet 1 and the second rubber sheet 2 are both rectangular, the metal frame 3 is rectangular, and the rubber strip frame 4 is rectangular. The first rubber sheet 1 and the second rubber sheet 2 can be made of EPDM rubber, the rubber strip frame 4 can be made of EPDM rubber, and the metal frame 3 can be made of 45 steel.

[0039] The production process of this rubber airbag adopts a segmented vulcanization method. The airbag cavity 8 in the rubber airbag does not need to be formed by placing a mold core. The already formed first rubber layer 1 and the second rubber layer 2 are laid on the metal frame 3 in an integrated molding method, ensuring that the process is simple and feasible, and an airbag product with a hollow cavity can be produced.

[0040] The production process of this rubber airbag is to stack the first rubber 1, the rubber strip frame 4, the glue-coated metal frame 3, the rubber strip frame 4 and the second rubber 2 together, place them in a mold for compression vulcanization molding, and can best ensure the bonding performance between the metal frame 3 and the rubber strip frame 4, and between the rubber strip frame and the first rubber 1 and the second rubber 2.

[0041] Example 2

[0042] like Figure 1 and Figure 2 , a rubber airbag, prepared by the production process of a rubber airbag described in Example 1.

[0043] Performance test

[0044] Pressurized air is filled into the processed rubber airbag, and the test verification proves that the rubber airbag can be guaranteed not to debond or tear when inflated to 1MPa.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A production process for a rubber airbag, characterized in that: The following steps are involved: S1: First, a symmetrical first rubber sheet and a second rubber sheet are formed by vulcanization. The opposing surfaces of the first rubber sheet and the second rubber sheet serve as bonding surfaces, and an airbag cavity is formed in the middle of the bonding surfaces. S2: After vulcanization, the bonding surface is polished to remove the dense vulcanized layer on the bonding surface and roughen the bonding surface to increase the strength of subsequent bonding; S3: Processing a metal frame to be placed between the first rubber sheet and the second rubber sheet, wherein the outer frame of the metal frame corresponds to the shape of the bonding surface, and the metal frame is provided with ventilation holes from the outside to the inside. Then, the metal frame is sandblasted, and the surface of the metal frame is degreased and phosphated. Finally, rubber hot-vulcanized adhesive is applied to the surfaces of the metal frame opposite to the two bonding surfaces. S4: Processing a strip frame corresponding to the shape of the bonding surface; S5: Finally, the first rubber sheet, the rubber strip frame, the rubber-coated metal frame, the rubber strip frame and the second rubber sheet are stacked together in sequence, and placed in a mold for compression vulcanization to form a rubber airbag. The outer periphery of the rubber airbag has an avoidance opening for avoiding the vent hole.

2. The production process of a rubber airbag according to claim 1, characterized in that: In step S1, the degree of vulcanization is 80% of the normal vulcanization time.

3. The production process of a rubber airbag according to claim 1, characterized in that: At least one reinforcement strip for increasing strength is fixedly connected in the metal frame.

4. The production process of a rubber airbag according to claim 3, characterized in that: The reinforcement strips are transverse reinforcement strips, longitudinal reinforcement strips, cross-shaped reinforcement strips, well-shaped reinforcement strips or V-shaped reinforcement strips.

5. The production process of a rubber airbag according to claim 1, characterized in that: A metal tube is fixed on the metal frame, the middle of the metal tube is a vent hole, and a metal tube groove matching the metal tube is opened on the bonding surface of the first rubber and the second rubber.

6. The production process of a rubber airbag according to claim 1, characterized in that: The production process of the rubber strip frame is to first press out a rubber sheet of a specified thickness through an open mill or a tablet press, and then cut out the rubber strip frame of a specified size through a punching die.

7. A process for producing a rubber airbag according to any one of claims 1 to 6, characterized in that: The first rubber and the second rubber are both rectangular, the metal frame is rectangular, and the rubber strip frame is rectangular.

8. A rubber airbag, characterized in that: The rubber airbag is prepared by using the production process of the rubber airbag according to any one of claims 1 to 7.

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