Micro rubber sealing element forming die

Abstract

The utility model discloses a tiny rubber sealing element forming mold, which belongs to the technical field of rubber product molds and comprises a bottom plate, a multi-layer combined forming mechanism, a rubber feeding structure and an auxiliary demolding mechanism, and a layered combined forming mechanism is mounted in the middle of the upper end of the bottom plate; the layered combined forming mechanism is composed of a material pressing plate, an upper die plate, a middle die plate, a lower die plate and a die core, and the die core is fixedly installed at the lower end of the upper die plate. A cavity is formed in the middle of the middle template; glue feeding structures are arranged on the upper template and the middle template; an auxiliary demolding mechanism is arranged on the middle template and the bottom plate; compared with the prior art, the burr-free rubber sealing element has the advantages that the burr-free effect is achieved when a rubber sealing element product is produced, the burr removing procedure is omitted, and the production cost is reduced; and gas generated during vulcanization can be naturally discharged outwards through a fit clearance between the lower inclined surface of the middle mold plate and the upper inclined surface of the lower mold plate, so that burrs and bubbles are further prevented from occurring during molding of the rubber sealing element.

Description

[Technical Field]

[0001] This utility model relates to the field of rubber product mold technology, specifically a molding mold for miniature rubber seals. [Background Technology]

[0002] The manufacturing process of rubber seals includes steps such as mixing, molding, vulcanization, and post-processing. Among them, the molding process adopts methods such as compression molding, extrusion, or injection molding, depending on the shape and size requirements of the seal.

[0003] Chinese patent CN212707612U discloses a vulcanization molding die for rubber seals, including a base frame. Fixing blocks are fixedly connected to both sides of the inner cavity of the base frame. A lower die is fixedly connected to the other end of each fixing block. Columns are fixedly connected to both sides of the top of the lower die. A horizontal plate is fixedly connected to the top of each column. A cylinder is fixedly connected to the bottom of the horizontal plate. An upper die is fixedly connected to the bottom of the cylinder. However, this die still has the following problems during use:

[0004] The device uses conventional compression molding molds. When it is necessary to mold thin rubber seals, it will cause burrs to appear on the outer end of the seals and make demolding difficult.

[0005] Based on this, the present invention designs a micro rubber seal molding die to solve the above problems. [Utility Model Content]

[0006] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a mold for forming micro rubber seals.

[0007] To achieve the above objectives, a micro rubber seal molding die is designed, including a base plate, a multi-layer combined molding mechanism, a glue injection structure, and an auxiliary demolding mechanism. The multi-layer combined molding mechanism for molding micro, burr-free rubber seals is installed at the upper center of the base plate. The multi-layer combined molding mechanism consists of a pressure plate, an upper template, a middle template, a lower template, and a mold core. The lower template is fixedly installed at the upper center of the base plate, and the pressure plate, upper template, middle template, and lower template are interlocked and fixed. The lower side of the upper template and the upper side of the lower template are both provided with inclined surfaces. The upper side of the middle template has an inclined surface that mates with the lower side of the upper template. The lower side of the middle template has an inclined surface that mates with the upper side of the lower template. The lower end of the upper template is fixedly installed with a mold core. A cavity is provided in the middle of the middle template. A glue injection structure is provided on the upper template and the middle template. An auxiliary demolding mechanism is provided on the middle template and the base plate to assist in the demolding of the rubber seal from the cavity after molding.

[0008] Furthermore, a fitting clearance is provided between the lower inclined surface of the intermediate template and the upper inclined surface of the lower template, as well as between the upper inclined surface of the intermediate template and the lower inclined surface of the upper template; the tolerance of the fitting clearance is ≤0.003mm;

[0009] Furthermore, a composite release coating is sprayed onto the surface of the mold core and the inner wall of the cavity;

[0010] Furthermore, the lower end of the mold core is provided with an inner diameter cutting edge; the lower end of the upper template and the upper side of the middle part of the middle template are both provided with outer diameter cutting edges;

[0011] Furthermore, the glue injection structure includes a main glue injection channel; glue injection holes are symmetrically arranged on the left and right sides of the upper template; a main glue injection channel is arranged on the left and right sides of the upper end of the middle template; and the glue injection holes are connected to the main glue injection channel.

[0012] Furthermore, the auxiliary demolding mechanism includes an air gun and a drive assembly for controlling the movement of the air gun; a blowing hole is provided on the right side of the intermediate template; the blowing hole is connected to the cavity; and the air gun is connected to the drive assembly.

[0013] Furthermore, the drive assembly includes a guide rail, a sliding block, a movable plate, a bracket, a connecting pipe, and a control assembly for controlling the movement of the movable plate. The bracket is fixedly installed on the upper right side of the base plate; the guide rail is fixedly installed on the upper end of the bracket; the sliding block is slidably connected to the guide rail; the movable plate is fixedly installed on the upper end of the sliding block; the air gun is fixedly installed on the movable plate; and the air inlet of the air gun is connected to the air pump through the connecting pipe; the control assembly is installed on the upper right side of the base plate and is connected to the movable plate.

[0014] Furthermore, the opening size of the part on the left side of the blowing hole that connects to the cavity is 0.2mm.

[0015] Compared with the prior art, this utility model has the following advantages:

[0016] (1) This utility model enables rubber sealing products to achieve a burr-free effect during production, saving the deburring process and reducing production costs;

[0017] (2) The gas generated during vulcanization of this utility model will naturally be discharged outward through the gap between the lower inclined surface of the intermediate template and the upper inclined surface of the lower template, further avoiding burrs and bubbles during the molding of the rubber seal;

[0018] (3) After the product is molded, it will be wrapped around the inner wall of the cavity; then the auxiliary demolding mechanism will work to make the product shrink inward and detach from the inner wall of the cavity; through the cooperation of the outer diameter cutting edge and the inner diameter cutting edge, the mold core will not scratch the product during demolding.

[0019] (4) Since the product size is small, the composite release coating is sprayed on the surface of the mold core and the inner wall of the cavity, which can effectively reduce the adhesion of the rubber material, further improve the release efficiency, and improve the production efficiency of rubber seals. It is worth promoting and applying. [Image Description]

[0020] Figure 1 This is a perspective view of a micro rubber seal molding die according to the present invention;

[0021] Figure 2 This is a front view of a micro rubber seal molding die according to the present invention;

[0022] Figure 3 This is a perspective view of the front of this utility model with a portion cut off;

[0023] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0024] Figure 5 This is a three-dimensional diagram of a multi-layered assembly molding mechanism;

[0025] In the diagram: 1. Pressure plate; 2. Upper template; 3. Middle template; 4. Lower template; 5. Mold core; 6. Inlet hole; 7. Main inlet channel; 8. Cavity; 9. Outer diameter cutting edge; 10. Inner diameter cutting edge; 11. Blowing hole; 12. Guide rail; 13. Sliding block; 14. Moving plate; 15. Air gun; 16. Push cylinder; 17. Base plate; 18. Bracket; 19. Connecting pipe; 20. Stand. [Detailed Implementation]

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0027] In some embodiments, please refer to the accompanying drawings. Figures 1-5 A mold for forming micro rubber seals includes a base plate 17, a multi-layer combined molding mechanism, a glue injection structure and an auxiliary demolding mechanism. The upper middle part of the base plate 17 is equipped with a multi-layer combined molding mechanism for forming micro burr-free rubber seals.

[0028] The layered assembly molding mechanism consists of a pressure plate 1, an upper template 2, an intermediate template 3, a lower template 4, and a mold core 5. The lower template 4 is fixedly installed at the upper middle part of the base plate 17, and the pressure plate 1, the upper template 2, the intermediate template 3, and the lower template 4 are interlocked and fixed to each other. The lower side of the upper template 2 and the upper side of the lower template 4 are both provided with inclined surfaces.

[0029] Furthermore, the upper side of the middle template 3 is provided with an inclined surface that matches the lower side of the upper template 2; the lower side of the middle template 3 is provided with an inclined surface that matches the upper side of the lower template 4.

[0030] A mold core 5 is fixedly installed at the lower end of the upper template 2; a cavity 8 is provided in the middle of the middle template 3; a fitting clearance is provided between the lower inclined surface of the middle template 3 and the upper inclined surface of the lower template 4, and between the upper inclined surface of the middle template 3 and the lower inclined surface of the upper template 2; the fitting clearance tolerance is ≤0.003mm;

[0031] The lower end of the mold core 5 is provided with an inner diameter cutting edge 10;

[0032] The lower end of the upper template 2 and the upper side of the middle part of the middle template 3 are both provided with outer diameter cutting edges 9;

[0033] The upper template 2 and the middle template 3 are equipped with glue injection structures;

[0034] The glue injection structure includes a main glue injection channel 7; glue injection holes 6 are symmetrically arranged on the left and right sides of the upper template 2; the main glue injection channel 7 is arranged on the left and right sides of the upper end of the middle template 3; and the glue injection holes 6 are connected to the main glue injection channel 7.

[0035] The intermediate template 3 and the base plate 17 are equipped with auxiliary demolding mechanisms to help the rubber seals to be demolded from the cavity 8 after molding.

[0036] A composite release coating is sprayed on the surface of the mold core 5 and the inner wall of the cavity 8 to reduce rubber adhesion.

[0037] The composite release coating can be the TiN composite coating from Dongguan Jiujiang Nanotechnology Co., Ltd.;

[0038] In this invention, under normal working conditions, the pressure plate 1, upper template 2, middle template 3, and lower template 4 are inserted and fixed. Then, the rubber material enters the inlet hole 6 and, under the downward pressure of the pressure plate 1, enters the main inlet channel 7. Subsequently, it flows into the cavity 8 through the gap between the upper inclined surface of the middle template 3 and the lower inclined surface of the upper template 2. Then, the rubber material in the cavity 8 can be vulcanized. During the vulcanization process, the upper template 2, middle template 3, and lower template 4 enhance the closing pressure by mutually locking the inclined surfaces. Furthermore, since the gap tolerance between the inclined surfaces is ≤0.003mm, it will block the overflow of rubber, so that the rubber seal product achieves a burr-free effect during production, saving the deburring process and reducing production costs.

[0039] Furthermore, the gas generated during vulcanization will naturally escape outward through the gap between the lower inclined surface of the intermediate template 3 and the upper inclined surface of the lower template 4, further preventing burrs and air bubbles from appearing during the molding of rubber seals;

[0040] After molding, the product will be wrapped around the inner wall of cavity 8; then the auxiliary demolding mechanism will work to make the product shrink inward and detach from the inner wall of cavity 8; through the cooperation of the outer diameter cutting edge 9 and the inner diameter cutting edge 10, the mold core 5 will not scratch the product during demolding.

[0041] Furthermore, due to the small size of the product, spraying a composite release coating on the surface of the mold core 5 and the inner wall of the cavity 8 can effectively reduce the adhesion of the rubber material, further improve the release efficiency, and improve the production efficiency of rubber seals.

[0042] like Figure 1 As shown, the auxiliary demolding mechanism includes a guide rail 12, a sliding block 13, a moving plate 14, an air gun 15, a push cylinder 16, a bracket 18, a connecting pipe 19, and a stand 20. A blowhole 11 is provided on the right side of the intermediate template 3; the blowhole 11 communicates with the cavity 8; the bracket 18 is fixedly installed on the upper right side of the base plate 17; the guide rail 12 is fixedly installed on the upper end of the bracket 18; the sliding block 13 is slidably connected to the guide rail 12; the moving plate 14 is fixedly installed on the upper end of the sliding block 13; the air gun 15 is fixedly installed on the moving plate 14; the air inlet of the air gun 15 is connected to an air pump through the connecting pipe 19; the stand 20 is fixedly installed on the upper right side of the base plate 17; the push cylinder 16 is fixedly installed on the stand 20, and the output end of the push cylinder 16 is fixedly connected to the moving plate 14.

[0043] The opening size of the part on the left side of the blow hole 11 that connects with the cavity 8 is 0.2mm;

[0044] In this invention, after molding, the product will be wrapped around the inner wall of the cavity 8; then the push cylinder 16 will work to push the moving plate 14 to move horizontally to the left along the guide rail 12, following the sliding block 13. During the movement, the air outlet of the air gun 15 will be inserted into the blowing hole 11. Then the air gun 15 will work to inject a small amount of compressed gas into the blowing hole 11. The compressed gas moves through the blowing hole 11 and drives the position of the cavity 8, causing the product to shrink inward and detach from the inner wall of the cavity 8.

[0045] The contents not described in detail in this specification are existing technologies known to those skilled in the art. The standard parts used can be purchased from the market, and the irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The machinery, parts and equipment adopt conventional models in the existing technology, and the circuit connection adopts conventional connection methods in the existing technology, which will not be described in detail here.

[0046] This utility model is not limited to the above-described embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of this utility model shall be considered equivalent substitutions and shall be included within the protection scope of this utility model.

Claims

1. A micro rubber seal forming die comprising a base plate (17) characterised in that: It also includes a multi-layer combined molding mechanism, a glue injection structure and an auxiliary demolding mechanism. The upper middle part of the base plate (17) is equipped with a layered combined molding mechanism for molding small, burr-free rubber seals. The layered combined molding mechanism consists of a pressure plate (1), an upper template (2), a middle template (3), a lower template (4) and a mold core (5). The lower template (4) is fixedly installed in the upper middle part of the base plate (17), and the pressure plate (1), upper template (2), middle template (3) and lower template (4) are interlocked and fixed. The lower side of the upper template (2) and the upper side of the lower template (4) are both provided with inclined surfaces. The upper side of the middle template (3) is provided with an inclined surface that cooperates with the lower side of the upper template (2). The lower side of the middle template (3) is provided with an inclined surface that cooperates with the upper side of the lower template (4). The upper template (2) is fixedly installed with a mold core (5); the middle template (3) is provided with a cavity (8); the upper template (2) and the middle template (3) are provided with a glue injection structure; the middle template (3) and the bottom plate (17) are provided with an auxiliary demolding mechanism to help the rubber seal to be demolded from the cavity (8) after molding.

2. The micro rubber seal molding die according to claim 1, characterized by: A fitting gap is provided between the lower inclined surface of the intermediate template (3) and the upper inclined surface of the lower template (4), and between the upper inclined surface of the intermediate template (3) and the lower inclined surface of the upper template (2); the tolerance of the fitting gap is ≤0.003mm.

3. The micro rubber seal molding die according to claim 2, characterized by: The surface of the mold core (5) and the inner wall of the cavity (8) are both coated with a composite release coating.

4. The micro rubber seal molding die according to claim 3, characterized by: The lower end of the mold core (5) is provided with an inner diameter cutting edge (10); the lower end of the upper template (2) and the upper side of the middle part of the intermediate template (3) are both provided with outer diameter cutting edges (9).

5. The micro rubber seal molding die according to claim 1, characterized by: The glue injection structure includes a main glue injection channel (7); glue injection holes (6) are symmetrically arranged on the left and right sides of the upper template (2); the main glue injection channel (7) is arranged on the left and right sides of the upper end of the middle template (3); and the glue injection holes (6) are connected to the main glue injection channel (7).

6. The micro rubber seal molding die according to claim 1, characterized by: The auxiliary demolding mechanism includes an air gun (15) and a drive assembly for controlling the movement of the air gun (15); a blow hole (11) is provided on the right side of the intermediate template (3); the blow hole (11) is connected to the cavity (8); the air gun (15) is connected to the drive assembly.

7. The micro rubber seal molding die according to claim 6, characterized by: The drive assembly includes a guide rail (12), a sliding block (13), a moving plate (14), a bracket (18), a connecting pipe (19), and a control assembly for controlling the movement of the moving plate (14). The bracket (18) is fixedly installed on the upper right side of the base plate (17); the guide rail (12) is fixedly installed on the upper end of the bracket (18); the sliding block (13) is limited and slidably connected to the guide rail (12); the moving plate (14) is fixedly installed on the upper end of the sliding block (13); the air gun (15) is fixedly installed on the moving plate (14); and the air inlet of the air gun (15) is connected to the air pump through the connecting pipe (19); the control assembly is installed on the upper right side of the base plate (17) and is connected to the moving plate (14).

8. The micro rubber seal molding die according to claim 6, characterized in that: The opening size of the left side of the blowing hole (11) connected with the cavity (8) is 0.2mm.

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