Multi-cavity nitrogen spring core vulcanization mold

Abstract

The utility model discloses a multi-cavity nitrogen spring core vulcanization mold, which belongs to the technical field of vulcanization molds, and comprises an upper mold plate and a lower mold plate, and a mold cavity plate is arranged between the upper mold plate and the lower mold plate; a plurality of mold core holes are evenly distributed in the mold cavity plate, ejection columns are arranged at the positions, corresponding to the mold core holes, of the lower mold plate, valve cores can be placed in the mold core holes, and when the mold cavity plate and the lower mold plate are combined, the ejection columns on the lower mold plate can position the valve cores in the mold core holes. An upper mold groove is formed in the bottom of the upper mold plate corresponding to the mold core hole, and when the upper mold plate and the mold cavity plate are combined, a vulcanization cavity is formed between the upper mold groove and the mold cavity plate; the plane grooves are formed between the adjacent mold core holes, the rubber strips can be placed in the plane grooves, after the mold is closed, the rubber strips can be melted under the high-temperature condition and flow into the vulcanization cavity, the sealing rings can be vulcanized on the valve cores in batches through the structure, the production efficiency is improved, and the sealing rings directly vulcanized on the valve cores are more reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of vulcanization molds, in particular to a multi-cavity nitrogen spring core vulcanization mold. Background Art

[0002] As an important part of nitrogen gas springs, good sealing plays a vital role in whether the nitrogen gas spring core can work reliably. In order to adapt to the rapid development of nitrogen gas springs, it is necessary for us to study a nitrogen gas spring valve core with good sealing, high reliability and strong adaptability.

[0003] The traditional sealing ring assembly method is to manually adhere the sealing ring to the valve core, which is inefficient and has low reliability. Therefore, strict requirements are currently imposed on the sealing ring assembly of the spring valve core. Utility Model Content

[0004] In order to solve the problems existing in the prior art, the utility model provides a multi-cavity nitrogen spring core vulcanization mold, which can vulcanize sealing rings on valve cores in batches, thereby improving production efficiency, and the sealing rings directly vulcanized on the valve cores are more reliable.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: a multi-cavity nitrogen spring core vulcanization mold, comprising an upper mold plate and a lower mold plate, wherein a mold cavity plate is provided between the upper mold plate and the lower mold plate;

[0006] The cavity plate is evenly distributed with a plurality of core holes, and the lower template is provided with a top column corresponding to the core hole position, and the valve core can be placed in the core hole. When the cavity plate and the lower template are combined, the top column on the lower template can position the valve core in the core hole;

[0007] An upper mold groove is provided at the bottom of the upper mold plate corresponding to the mold core hole. When the upper mold plate is combined with the mold cavity plate, a vulcanization chamber is formed between the upper mold groove and the mold cavity plate.

[0008] Plane grooves are arranged between adjacent core holes, and rubber strips can be placed in the planar grooves. After the mold is closed, the rubber strips can melt under high temperature conditions and flow into the vulcanization chamber.

[0009] Preferably, the core hole is set as a stepped hole, and the diameter of the stepped hole close to the upper template is smaller than the diameter of the stepped hole close to the lower template;

[0010] A vulcanization mold core is provided in the step hole, and the vulcanization mold core is a step columnar structure with a hole in the center;

[0011] The hole at the center of the vulcanization mold core is set as a positioning hole, and the valve core can be arranged in the positioning hole.

[0012] Preferably, the positioning hole comprises a first hole segment and a second hole segment, the diameter of the first hole segment is larger than the diameter of the second hole segment, the first hole segment is close to the lower template, the second hole segment is close to the upper template, and a diameter reducing segment is provided between the first hole segment and the second hole segment;

[0013] A limiting boss is provided on the inner wall of the upper end of the second hole segment, and the limiting boss can limit the position of the valve core in the positioning hole.

[0014] Preferably, it further comprises a die pin, the end of which is provided with a boss, the die pin can be inserted into the inner hole of the valve core, the boss diameter of the die pin is larger than the inner hole diameter of the valve core, and the boss is located at the upper end of the valve core;

[0015] When the upper mold plate is combined with the mold cavity plate, the upper mold plate can abut against the boss and seal the inner hole of the valve core.

[0016] Preferably, an upper die hole is provided at the bottom of the upper die plate corresponding to the position of the die core hole, an upper die block is provided in the upper die hole, and the upper die groove is provided at the bottom of the upper die block.

[0017] Preferably, a glue overflow groove is provided on the end surface of the upper mold groove or the upper end surface of the vulcanization mold core.

[0018] Preferably, a cutting edge is provided on the end surface of the upper mold groove or the upper end surface of the vulcanization mold core, and the cutting edge is located between the overflow groove and the vulcanization chamber.

[0019] Preferably, a lower die hole is provided on the lower die plate at a position corresponding to the die core hole, and the ejector column is arranged in the lower die hole.

[0020] Preferably, an anti-interference hole is provided at the center of the upper end surface of the top column, and the hole diameter of the anti-interference hole is larger than the diameter of the mold pin.

[0021] Preferably, a lifting guide positioning structure is provided between the upper template and the cavity plate, and the lifting guide positioning structure is configured as guide holes and guide columns. A plurality of guide holes are provided on the upper template or the cavity plate, and a guide column is provided on another upper template or the cavity plate at a position corresponding to the guide holes.

[0022] The utility model is beneficial in that:

[0023] 1. The utility model directly vulcanizes the seal to the nitrogen spring valve core, which changes the way of gluing the product to the seal, improves the production efficiency of the product and enhances the reliability of the product.

[0024] 2. The utility model realizes the vulcanization of a large number of products at one time through a one-mold multi-cavity structure, which saves time and is highly efficient compared to manual bonding.

[0025] 3. The utility model provides a cutting edge between the overflow glue groove and the vulcanization chamber. After the product is vulcanized, the cutting edge can cut off the connection between the product and the excess glue in the overflow glue groove, so that the mold position of the product is more neat and has no flash. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of a multi-cavity nitrogen spring core vulcanization mold when opening the mold;

[0027] Figure 2 It is a schematic diagram of a multi-cavity nitrogen spring core vulcanization mold when the mold is closed;

[0028] Figure 3 It is a schematic diagram of the utility model at A;

[0029] Figure 4 It is a schematic diagram of the vulcanization mold core of the utility model;

[0030] Figure 5 It is a schematic diagram of the upper module of the utility model;

[0031] Figure 6 This is a bottom view of the upper template of the utility model;

[0032] Figure 7 It is a top view of the cavity plate of the utility model;

[0033] Figure 8 It is a top view of the lower template of the utility model.

[0034] In the figure: 1-upper template, 2-cavity plate, 3-lower template, 4-upper module, 5-upper mold groove, 6-cutting edge, 7-overflow glue groove, 8-upper through hole, 9-guide column, 10-core hole, 11-vulcanization core, 12-mold pin, 13-boss, 14-limiting boss, 15-flat groove, 16-rubber strip, 17-top column, 18-anti-interference hole, 19-lower through hole. DETAILED DESCRIPTION

[0035] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0036] like Figures 1 to 8 As shown, a multi-cavity nitrogen spring core vulcanization mold includes an upper mold plate 1 and a lower mold plate 3, and a mold cavity plate 2 is arranged between the upper mold plate 1 and the lower mold plate 3. A plurality of mold core holes 10 are evenly distributed on the mold cavity plate 2, and a top column 17 is arranged on the lower mold plate 3 at the position corresponding to the mold core hole 10, and the valve core can be placed in the mold core hole 10. When the mold cavity plate 2 and the lower mold plate 3 are combined, the top column 17 on the lower mold plate 3 can position the valve core in the mold core hole 10, so as to avoid the movement of the valve core affecting the vulcanization position when the product is vulcanized.

[0037] An upper mold groove 5 is provided at the bottom of the upper mold plate 1 at a position corresponding to the mold core hole 10. When the upper mold plate 1 is combined with the mold cavity plate 2, a vulcanization chamber is formed between the upper mold groove 5 and the mold cavity plate 2. A plane groove 15 is provided between adjacent mold core holes 10. A rubber strip 16 can be placed in the plane groove 15. After the mold is closed, the rubber strip 16 can melt under high temperature conditions and flow into the vulcanization chamber. After the vulcanization is completed, the remaining rubber can be taken out as a whole, which is convenient for operation and saves time.

[0038] The utility model directly vulcanizes the seal to the nitrogen spring valve core, which changes the way of gluing the product to the seal, improves the production efficiency of the product and enhances the reliability of the product. Moreover, the utility model uses the rubber strip 16 vulcanization method, which is easier to maintain pressure than the method of injecting glue into the vulcanization chamber, and the pressure is large and stable. The seal ring formed by vulcanization fits the core more firmly, thereby achieving a good sealing effect and realizing batch vulcanization of products more efficiently.

[0039] The core hole 10 of the utility model is set as a step hole, the aperture of the step hole close to the upper template 1 is smaller than the aperture of the step hole close to the lower template 3, a vulcanization mold core 11 is arranged in the step hole, the vulcanization mold core 11 is set as a step columnar structure with a hole in the center, the hole in the center of the vulcanization mold core 11 is set as a positioning hole, and the valve core can be set in the positioning hole.

[0040] The positioning hole includes a first hole section and a second hole section. The diameter of the first hole section is larger than that of the second hole section. The first hole section is close to the lower template 3, and the second hole section is close to the upper template 1. A reducing section is provided between the first hole section and the second hole section. A limiting boss 14 is provided on the inner wall of the upper end of the second hole section. The limiting boss 14 can limit the position of the valve core in the positioning hole. With the help of the above structure and the support of the top column 17 from the bottom to the top, the sealing between the valve core and the positioning hole can be guaranteed.

[0041] It also includes a mold pin 12, a boss 13 is provided at the end of the mold pin 12, the mold pin 12 can be inserted into the inner hole of the valve core, the diameter of the boss 13 of the mold pin 12 is larger than the diameter of the inner hole of the valve core, the boss 13 is located at the upper end of the valve core, when the upper mold plate 1 is combined with the mold cavity plate 2, the upper mold plate 1 can abut the boss 13 and seal the inner hole of the valve core, when the product is vulcanized, the boss 13 can seal the inner hole of the product to prevent rubber from being injected into the inner hole of the product.

[0042] An upper die hole is provided at the bottom of the upper mold plate 1 corresponding to the position of the die core hole 10 of the utility model, an upper die block 4 is provided in the upper die hole, and an upper die groove 5 is arranged at the bottom of the upper die block 4. The above structure can adjust the size of the vulcanization chamber of different products by replacing different upper die blocks 4, thereby reducing the production cost of the enterprise and making maintenance simple and convenient. An upper through hole 8 is preferably penetrated upwardly at the bottom of the upper die hole, and the size of the upper through hole 8 is smaller than that of the upper die hole, so that the upper module 4 can be conveniently removed from the upper die hole through the upper through hole 8 using a tool.

[0043] Similarly, a lower mold hole is provided on the lower mold plate 3 at a position corresponding to the core hole 10, and a top column 17 is arranged in the lower mold hole. By replacing different top columns 17, support for products of different sizes can be achieved. A lower through hole 19 is preferably penetrated downwardly from the bottom of the lower mold hole. The size of the lower through hole 19 is smaller than the size of the lower mold hole, so that it is convenient to use tools to remove the top column 17 from the lower mold hole through the lower through hole 19. An anti-interference hole 18 is preferably provided at the center of the upper end surface of the top column 17. The aperture of the anti-interference hole 18 is larger than the diameter of the mold pin 12 to avoid interference between the mold pin 12 and the top column 17 after the mold is closed.

[0044] An overflow glue groove 7 is provided on the notch end face of the upper mold groove 5 or the upper end face of the vulcanization mold core 11. After the vulcanization chamber is filled, excess glue overflows into the overflow glue groove 7. A cutting edge 6 is provided on the notch end face of the upper mold groove 5 or the upper end face of the vulcanization mold core 11. The cutting edge 6 is located between the overflow glue groove 7 and the vulcanization chamber. After the product is vulcanized, the cutting edge 6 can cut off the connection between the product and the excess glue in the overflow glue groove 7, so that the product mold position is more neat and has no flash.

[0045] A lifting guide positioning structure is preferably provided between the upper template 1 and the cavity plate 2. The lifting guide positioning structure is configured as guide holes and guide columns 9. Specifically, a plurality of guide columns 9 can be arranged at the bottom of the upper template 1, and guide holes are arranged on the cavity plate 2 at positions corresponding to the guide columns 9. The guide columns 9 and guide holes are used to realize the guided lifting and lowering between the upper template 1 and the cavity plate 2.

[0046] The specific working process of this utility model:

[0047] Before vulcanization, the mold is preheated to the set temperature. During vulcanization, the product is placed in the positioning hole of the vulcanization core 11 of the cavity plate 2, and the lower template 3 is merged with the cavity plate 2. The top column 17 located at the lower template 3 will support the product, and then the mold pin 12 is inserted into the inner hole of the product, and the rubber strip 16 is placed in the flat groove 15 of the cavity plate 2, evenly arranged, and the upper template 1 is merged with the cavity plate 2. Under the action of high temperature and high pressure, the rubber strip 16 flows into each vulcanization chamber. After it is full, the excess rubber will overflow into the overflow groove 7. After the vulcanization process is completed, the upper template 1 is separated from the cavity plate 2, and the lower template 3 is separated from the cavity plate 2. The mold pin 12 and the vulcanized product are ejected through the corresponding tooling, and the product and the excess rubber in the overflow groove 7 are taken out to complete the product vulcanization process.

[0048] It should be understood that the purpose of these embodiments is only to illustrate the utility model and is not intended to limit the protection scope of the utility model. In addition, it should also be understood that after reading the technical content of the utility model, those skilled in the art can make various changes, modifications and / or variations to the utility model, and all of these equivalent forms also fall within the protection scope defined by the claims attached to this application.

Claims

1. A multi-cavity nitrogen spring core vulcanization mold, characterized in that: It comprises an upper template (1) and a lower template (3), wherein a cavity plate (2) is provided between the upper template (1) and the lower template (3); The cavity plate (2) is evenly distributed with a plurality of core holes (10); the lower mold plate (3) is provided with a top column (17) at a position corresponding to the core hole (10); the valve core can be placed in the core hole (10); when the cavity plate (2) and the lower mold plate (3) are combined, the top column (17) on the lower mold plate (3) can position the valve core in the core hole (10); An upper mold groove (5) is provided at the bottom of the upper mold plate (1) at a position corresponding to the mold core hole (10); when the upper mold plate (1) is combined with the mold cavity plate (2), a vulcanization chamber is formed between the upper mold groove (5) and the mold cavity plate (2); Plane grooves (15) are provided between adjacent core holes (10), and rubber strips (16) can be placed in the planar grooves (15). After the mold is closed, the rubber strips (16) can melt under high temperature conditions and flow into the vulcanization chamber.

2. A multi-cavity nitrogen spring core vulcanization mold according to claim 1, characterized in that: The core hole (10) is set as a stepped hole, and the diameter of the stepped hole close to the upper mold plate (1) is smaller than the diameter of the stepped hole close to the lower mold plate (3); A vulcanization mold core (11) is provided in the step hole, and the vulcanization mold core (11) is a step columnar structure with a hole in the center; The hole at the center of the vulcanization mold core (11) is set as a positioning hole, and the valve core can be arranged in the positioning hole.

3. A multi-cavity nitrogen spring core vulcanization mold according to claim 2, characterized in that: The positioning hole comprises a first hole section and a second hole section, the diameter of the first hole section is larger than the diameter of the second hole section, the first hole section is close to the lower template (3), the second hole section is close to the upper template (1), and a diameter reducing section is provided between the first hole section and the second hole section; A limiting boss (14) is provided on the inner wall of the upper end of the second hole section, and the limiting boss (14) can limit the position of the valve core in the positioning hole.

4. A multi-cavity nitrogen spring core vulcanization mold according to claim 1, characterized in that: It also includes a mold pin (12), the end of the mold pin (12) is provided with a boss (13), the mold pin (12) can be inserted into the inner hole of the valve core, the diameter of the boss (13) of the mold pin (12) is larger than the inner hole diameter of the valve core, and the boss (13) is located at the upper end of the valve core; When the upper mold plate (1) is combined with the mold cavity plate (2), the upper mold plate (1) can abut against the boss (13) and seal the inner hole of the valve core.

5. A multi-cavity nitrogen spring core vulcanization mold according to claim 2, characterized in that: An upper die hole is provided at the bottom of the upper die plate (1) at a position corresponding to the die core hole (10), an upper die block (4) is provided in the upper die hole, and the upper die groove (5) is provided at the bottom of the upper die block (4).

6. A multi-cavity nitrogen spring core vulcanization mold according to claim 5, characterized in that: A glue overflow groove (7) is provided on the notch end surface of the upper mold groove (5) or the upper end surface of the vulcanization mold core (11).

7. A multi-cavity nitrogen spring core vulcanization mold according to claim 6, characterized in that: A cutting edge (6) is provided on the notch end surface of the upper mold groove (5) or the upper end surface of the vulcanization mold core (11), and the cutting edge (6) is located between the overflow groove (7) and the vulcanization chamber.

8. The multi-cavity nitrogen spring core vulcanization mold according to claim 1, characterized in that: A lower die hole is provided on the lower die plate (3) at a position corresponding to the die core hole (10), and the top column (17) is arranged in the lower die hole.

9. A multi-cavity nitrogen spring core vulcanization mold according to claim 8, characterized in that: An anti-interference hole (18) is provided at the center of the upper end surface of the top column (17), and the hole diameter of the anti-interference hole (18) is larger than the diameter of the die pin (12).

10. The multi-cavity nitrogen spring core vulcanization mold according to claim 1, characterized in that: A lifting guide positioning structure is provided between the upper template (1) and the cavity plate (2), and the lifting guide positioning structure is configured as a guide hole and a guide column (9). A plurality of guide holes are provided on the upper template (1) or the cavity plate (2), and a guide column (9) is provided at a position corresponding to the guide hole on the other upper template (1) or the cavity plate (2).

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