A rapid vulcanization forming process for a split rubber crawler

Abstract

The present invention relates to the field of track forming technology, and specifically discloses a rapid vulcanization forming process for a split rubber track, comprising: step S1, preparation of a reinforcement belt, wherein four connecting parts are arranged in parallel in groups of two, and a central part is fixed equidistantly above the connecting part to form a reinforcement belt; step S2, cutting, wherein a cutting device cuts the surrounding part with the central part as the center; step S3, winding and connecting, inserting a central pin along the side wall of the central part, and the movable end of the surrounding part is wound around the central pin; this process sets the reinforcement structure of the split rubber track as a continuous belt structure, and the reinforcement belt only needs to be wound and pulled to achieve the overall movement of the reinforcement belt. The reinforcement belt is sequentially divided, cored, bent, connected, injection molded, vulcanized, and cored by a mold. The split rubber track lug reinforcement is achieved, and the conveying accuracy is high and only one precision conveying structure is needed, thereby reducing costs.

Description

Technical Field

[0001] The invention relates to the technical field of crawler track molding, in particular to a rapid vulcanization molding process for a split rubber crawler track. Background Art

[0002] The split rubber crawler forms a closed loop crawler through the head and tail hinges of the lugs. The advantage of the split rubber crawler is that the crawler can be replaced if it is partially damaged. The processing difficulty of the split rubber crawler is compared with the closed loop crawler, and it needs to be processed and vulcanized independently.

[0003] The split rubber track not only contains rubber, but also has a core metal or tensile layer inside. Since the lugs of the split rubber track need to be connected to bear the force, the core metal or tensile layer needs to include the lug part.

[0004] During the production of split rubber tracks, rubber injection vulcanization molding can be used. The core metal or tensile layer is placed in the mold cavity, and the molten material is injected into the cavity. After the molten material solidifies and forms, the molten material covers the core metal or tensile layer.

[0005] The split rubber track disassembles a closed-loop track into multiple independent units, and the independent units are not conducive to continuous processing. Compared with the array-type vulcanization mold of the closed-loop track, the closed-loop track has a belt body composed of a closed-loop core gold or a tensile layer. The conveying mechanism can use a wheel drive to drive the closed-loop belt body to move, so as to achieve two-stage or one-piece vulcanization molding. Since the split rubber tracks are not connected to each other, the split rubber tracks require the use of more mature conveying equipment, which independently conveys each core gold or tensile layer to an independent mold, such as a robotic arm. Due to the large number of split rubber tracks, if each robotic arm controls the material conveying of a mold separately, a large number of robotic arms are required, resulting in increased maintenance costs and usage costs.

[0006] A Chinese patent (CN107618143A) discloses a rubber injection molding and vulcanization production line that uses linear conveying to transport the rubber injection mold to a flat-bed vulcanizer. While this patent addresses the mold conveying issue during vulcanization, it does not address the issue of conveying the split rubber track core metal into the mold due to the large number of split rubber tracks. Summary of the Invention

[0007] The purpose of the present invention is to provide a rapid vulcanization molding process for a split rubber track, by preparing the reinforcement structure of the split rubber track into a belt type, and using the form of winding to allow the reinforcement belt to enter the linear mold. After the reinforcement belt reaches the mold position, the surrounding part is cut, and the center pin bends and supports the surrounding part to form a closed loop, and the surrounding part and the center part are fixedly connected. The reinforcement belt is converted into multiple independent vulcanization molding reinforcement units when entering the mold cavity for molding and vulcanization, and continuous processing and transportation are convenient. The distance between the two center parts is fixed, and the distance between the linearly distributed molds is fixed. The reinforcement belt only needs to be quantitatively wound to achieve the alignment of multiple center parts and the mold. The transportation accuracy is high and only one precision transportation structure is needed, which reduces costs and solves the problems raised in the above background technology.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A rapid vulcanization molding process for a split rubber track, comprising:

[0010] Step S1: Preparation of reinforcement tape:

[0011] The four connecting parts are arranged in parallel in groups of two, and the central parts are fixed equidistantly above the connecting parts to form a reinforcement belt, and the part of the connecting part located between two adjacent central parts is the surrounding part;

[0012] Step S2: Cutting:

[0013] The cutting device cuts the surrounding parts with the central part as the center, the cutting ends of the two surrounding parts in the same group are opposite, and the cutting points of the two groups of surrounding parts are symmetrically distributed with the central dividing line as the center line;

[0014] Step S3: Wrapping connection:

[0015] A center pin is inserted along the side wall of the central portion, the movable end of the surrounding portion surrounds the center pin as the center, the movable end of the surrounding portion is fixedly connected to the central portion to form a closed loop, and the central portion, the surrounding portion, and the center pin constitute a vulcanization molding reinforcement unit;

[0016] Step S4: Rubber injection vulcanization:

[0017] The vulcanization molding reinforcement unit is placed in the mold cavity, the center pin is in closed-loop contact with the surrounding portion, rubber is injected into the mold cavity, and the rubber wraps the vulcanization molding reinforcement unit through vulcanization molding.

[0018] As a further solution of the present invention: step S1 is replaced by step S1a, step S1a: four metal strips are used as the basic strips, the four metal strips are distributed in parallel in groups of two, core gold is fixed equidistantly above the metal strips to form the reinforcement strip, and the part of the connecting part located between the two adjacent center parts is the surrounding part.

[0019] As a further solution of the present invention: step S3 is replaced by step S3a, step S3a: insert the center pin along the side wall of the central part, and surround the movable end of the surrounding part with the center pin as the center, the movable ends of the two surrounding parts are in contact and fixed with each other, and the central part, the surrounding part and the center pin constitute the vulcanization molding reinforcement unit.

[0020] As a further solution of the present invention: step S1 is replaced by step S1b: Step S1b: four metal wires are used as the basic belt, and the four metal wires are distributed in parallel in groups of two. Metal meshes are fixed at equal intervals above the metal wires to form the reinforcement belt, and the part of the metal wire located between two adjacent metal meshes is the surrounding part.

[0021] As a further solution of the present invention: step S3 is replaced by step S3b, step S3b: insert the center pin along the boundary of the metal mesh, and surround the movable end of the surrounding part with the center pin as the center, and the movable end of the metal wire is fixed at the boundary of the metal mesh, and the center part, the surrounding part, and the center pin constitute the vulcanization molding reinforcement unit.

[0022] As a further solution of the present invention: step S3 is changed to step S31: a center pin is inserted along the side wall of the center portion, and the thick diameter portion of the center pin is brought into contact with the surrounding portion, and the movable end of the surrounding portion is surrounded with the thick diameter portion of the center pin as the center, and the movable end of the surrounding portion is fixedly connected to the center portion to form a closed loop, and the center portion, the surrounding portion and the center pin constitute the vulcanization molding reinforcement unit.

[0023] As a further solution of the present invention: step S4 is replaced by step S41, step S41: the vulcanization molding reinforcement unit is placed in the mold cavity, the center pin moves outward, the thin diameter portion of the center pin is located at the closed loop of the surrounding portion, rubber is injected into the cavity, the thin diameter portion of the center pin and the closed loop of the surrounding portion are spaced apart and are injected with rubber, and the rubber wraps the vulcanization molding reinforcement unit through vulcanization molding.

[0024] As a further solution of the present invention: the metal mesh in step S3b is at least one layer, and the movable end of the surrounding portion is fixed to the metal mesh by winding or welding.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] This process utilizes a continuous belt structure for the reinforcement of split rubber tracks. The belt's overall movement is achieved simply by winding and pulling it. A mold then sequentially separates the belt, inserts the core, bends it, connects it, injection molds it, vulcanizes it, and then cores it for sampling. This allows for the reinforcement of split rubber track lugs while simultaneously enabling multi-station simultaneous conveying without the need for a robotic arm. High conveying accuracy is achieved, and only a single precision conveying structure is required, reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, 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.

[0028] Figure 1 A schematic diagram of the processing of a core-metal split track in a rapid vulcanization molding process for a split rubber track;

[0029] Figure 2 A schematic diagram of the processing of a split-type rubber track in a rapid vulcanization molding process;

[0030] Figure 3 A schematic diagram of converting a belt body into an independent unit in a rapid vulcanization molding process of a split rubber track;

[0031] Figure 4 Schematic diagram of steps S31 and S41 in a rapid vulcanization molding process for a split-type rubber crawler;

[0032] In the figure: 1, center part; 2, connecting part; 3, surrounding part; 4, center pin; 5, center dividing line; 100, reinforcement belt; 200, vulcanization molding reinforcement unit. DETAILED DESCRIPTION

[0033] See also Figure 1-4 :

[0034] Example 1:

[0035] Step S1: Preparation of reinforcement tape 100:

[0036] The four connecting parts 2 are arranged in parallel in groups of two. The central parts 1 are fixed equidistantly above the connecting parts 2 to form a reinforcement belt 100. The portion of the connecting part 2 between two adjacent central parts 1 is the surrounding part 3.

[0037] Step S2: Cutting:

[0038] The cutting device cuts the surrounding parts 3 with the central part 1 as the center. The cutting ends of the two surrounding parts 3 in the same group are opposite, and the cutting points of the two groups of surrounding parts 3 are symmetrically distributed with the central dividing line 5 as the center line;

[0039] Step S3: Wrapping connection:

[0040] A center pin 4 is inserted along the side wall of the central portion 1. The movable end of the surrounding portion 3 surrounds the center pin 4. The movable end of the surrounding portion 3 is fixedly connected to the central portion 1 to form a closed loop. The central portion 1, the surrounding portion 3, and the center pin 4 constitute a vulcanization-molded reinforcement unit 200.

[0041] Step S4: Rubber injection vulcanization:

[0042] The vulcanization molding reinforcement unit 200 is placed in the mold cavity, the center pin 4 is in closed-loop contact with the surrounding portion 3, the rubber is injected into the cavity, and the rubber wraps the vulcanization molding reinforcement unit 200 through vulcanization molding.

[0043] Solution: The reinforcement structure of the split rubber track is configured as a continuous belt structure. The reinforcement belt 100 only needs to be wound and pulled to achieve overall movement. Using a mold, the reinforcement belt 100 is sequentially segmented, inserted, bent, connected, injection molded, vulcanized, and cored for sampling. This allows for simultaneous multi-station conveying without the need for a robotic arm, ensuring high conveying accuracy.

[0044] Splitting: The existing forming mold is formed by closing the upper and lower molds to form a closed cavity. The upper and lower molds are provided with cutting openings to complete the cutting during the closing process.

[0045] Insert: A telescopic structure of the center pin 4 can be set on the side of the mold. After cutting is completed, the center pin 4 is inserted into the mold and is located above the connection between the center part 1 and the surrounding part 3.

[0046] Bending and connecting: The bending drive component only needs to push the surrounding part 3 to move around the center pin 4, and the surrounding part 3 and the center part 1 are fixed by permanent fixing methods such as laser welding, winding or snap fixing.

[0047] Injection molding and vulcanization can be carried out using a rubber injection vulcanizing machine in one machine or a separate machine for molding and vulcanization.

[0048] Core pulling sampling: After the surrounding part 3 forms a closed loop, the rubber is cooled through the surrounding part 3 to form a ring-shaped ear with a hole structure. The center pin 4 is not conducive to demoulding, so the center pin 4 needs to move in the reverse direction to pull the core.

[0049] Advantages: The reinforcement structure of the split rubber track is prepared in a belt type, and the reinforcement belt 100 is rolled into the linear mold. After the reinforcement belt 100 reaches the mold position, the surrounding part 3 is cut, and the center pin 4 bends and supports the surrounding part 3 to form a closed loop, and the surrounding part 3 is fixedly connected to the center part 1. The reinforcement belt 100 is converted into multiple independent vulcanization molding reinforcement units 200 for molding and vulcanization when entering the mold cavity, and continuous processing and transportation are convenient. The distance between the two center parts 1 is fixed, and the distance between the linearly distributed molds is fixed. The reinforcement belt 100 only needs to be rolled up in a quantitative manner to achieve the alignment of multiple center parts 1 with the mold. The transportation accuracy is high and only one precision transportation structure is needed, which reduces costs.

[0050] Example 2:

[0051] Step S1a: Preparation of reinforcing tape 100:

[0052] Four metal strips are used as the basic strips, and the four metal strips are distributed in parallel in groups of two. Core metal is fixed equidistantly on the top of the metal strips to form a reinforcement strip 100. The part of the connecting part 2 located between two adjacent central parts 1 is the surrounding part 3.

[0053] Step S2: Cutting:

[0054] The cutting device cuts the surrounding parts 3 with the central part 1 as the center. The cutting ends of the two surrounding parts 3 in the same group are opposite, and the cutting points of the two groups of surrounding parts 3 are symmetrically distributed with the central dividing line 5 as the center line.

[0055] Step S3a: Wrapping connection:

[0056] Insert the center pin 4 along the side wall of the center portion 1, and surround the movable ends of the surrounding portions 3 with the center pin 4 as the center. The movable ends of the two surrounding portions 3 are in contact with each other and fixed. The center portion 1, the surrounding portions 3, and the center pin 4 form a vulcanization-molded reinforcement unit 200.

[0057] Step S4: Rubber injection vulcanization:

[0058] The vulcanization molding reinforcement unit 200 is placed in the mold cavity, the center pin 4 is in closed-loop contact with the surrounding portion 3, the rubber is injected into the cavity, and the rubber wraps the vulcanization molding reinforcement unit 200 through vulcanization molding.

[0059] This embodiment solves the problem of core gold rubber track molding. Please refer to Figure 1 The metal strips are arranged in groups of two, and the core gold is evenly distributed on the surface of the metal strips. The metal strips and the core gold are connected by permanent fixing methods such as welding and screw connection.

[0060] The lugs of the split rubber track are staggered, so Figure 1The red line portion in the figure is the cutting port. After the metal strip is cut, the surrounding portion 3 has a movable end and a fixed end. The surrounding portion 3 bends the movable end through the center pin 4, and the movable ends of the two surrounding portions 3 are in contact and connected by any permanent fixing method such as laser welding or snap fasteners. After the closed-loop surrounding portion 3 is fixed to the connecting portion 2, the center pin 4 seals the closed-loop bent end of the surrounding portion 3. When the vulcanized reinforcement unit 200 is subjected to rubber injection vulcanization molding after molding, the ear support hole is retained. The final molded shape of the vulcanized reinforcement unit 200 is adjusted by the shape of the mold cavity.

[0061] Supplementary explanation: After the movable ends of the surrounding part 3 are fixed to each other, if you want to increase the stability of the fixing of the surrounding part 3 and the core gold, you only need to weld the closed loop structure of the surrounding part 3 except the enclosed part of the center pin 4 to the core gold surface.

[0062] Example 3:

[0063] Step S1b: Preparation of the reinforcing tape 100:

[0064] Four metal wires are used as a basic belt, and the four metal wires are arranged in parallel in groups of two. Metal meshes are fixed equidistantly above the metal wires to form a reinforcement belt 100. The portion of the metal wire between two adjacent metal meshes is the surrounding portion 3.

[0065] Step S2: Cutting:

[0066] The cutting device cuts the surrounding parts 3 with the central part 1 as the center. The cutting ends of the two surrounding parts 3 in the same group are opposite, and the cutting points of the two groups of surrounding parts 3 are symmetrically distributed with the central dividing line 5 as the center line;

[0067] Step S3b: Wrapping connection:

[0068] Insert a center pin 4 along the edge of the metal mesh, and surround the movable end of the surrounding portion 3 with the center pin 4 as the center. The movable end of the metal wire is fixed at the edge of the metal mesh. The center portion 1, the surrounding portion 3, and the center pin 4 form a vulcanization molding reinforcement unit 200.

[0069] Step S4: Rubber injection vulcanization:

[0070] The vulcanization molding reinforcement unit 200 is placed in the mold cavity, the center pin 4 is in closed-loop contact with the surrounding portion 3, the rubber is injected into the cavity, and the rubber wraps the vulcanization molding reinforcement unit 200 through vulcanization molding.

[0071] This embodiment is designed for the production of small rubber tracks. For tracks requiring low strength, a tensile layer can be laid inside the rubber during processing. This embodiment offers improved production results for small rubber tracks because the tensile layer can be made of metal mesh. Thanks to the metal mesh's deformability, the resulting reinforcement belt 100 offers improved storage and minimizes its footprint.

[0072] For the preparation of a small rubber track, four metal wires are used as the base belt. Metal mesh is fixed equidistantly above the metal wires to form a reinforcement belt 100. The movable ends of the metal wires are fixed at the edges of the metal mesh. The metal mesh in step S3b is at least one layer. The movable ends of the surrounding portion 3 are fixed to the metal mesh by winding or welding. The number of layers of metal mesh can be adjusted according to needs, and the metal wires and metal mesh can be fixed by welding or winding.

[0073] Example 4:

[0074] S1: Preparation of reinforcement tape 100:

[0075] The four connecting parts 2 are arranged in parallel in groups of two. The central parts 1 are fixed equidistantly above the connecting parts 2 to form a reinforcement belt 100. The portion of the connecting part 2 between two adjacent central parts 1 is the surrounding part 3.

[0076] S2: Cutting:

[0077] The cutting device cuts the surrounding parts 3 with the central part 1 as the center. The cutting ends of the two surrounding parts 3 in the same group are opposite, and the cutting points of the two groups of surrounding parts 3 are symmetrically distributed with the central dividing line 5 as the center line.

[0078] S31: Wrap-around connection:

[0079] Insert the center pin 4 along the side wall of the center portion 1, and make the thick diameter portion of the center pin 4 contact the surrounding portion 3. Then, wrap the movable end of the surrounding portion 3 around the thick diameter portion of the center pin 4. The movable end of the surrounding portion 3 is fixedly connected to the center portion 1 to form a closed loop. The center portion 1, the surrounding portion 3, and the center pin 4 constitute a vulcanization-molded reinforcement unit 200.

[0080] Step S41: Rubber injection vulcanization:

[0081] The vulcanization molding reinforcement unit 200 is placed in the mold cavity, the center pin 4 moves outward, the thin diameter portion of the center pin 4 is located at the closed loop of the surrounding part 3, and the rubber is injected into the cavity. There is a gap between the thin diameter portion of the center pin 4 and the closed loop of the surrounding part 3 and rubber is injected. The rubber wraps the vulcanization molding reinforcement unit 200 and is vulcanized.

[0082] In Examples 1-3, the surrounding portion 3 is in contact with the center pin 4. After the surrounding portion 3 and the center pin 4 are contacted and the core is finally formed and pulled out, the surrounding portion 3 is located on the inner wall surface of the formed support ear.

[0083] In this embodiment, the surrounding portion 3 is adjusted to the inside of the formed lug, and steps S31 and S41 replace steps S3 and S4.

[0084] In this embodiment, the center pin 4 is modified into a stepped design with a larger diameter and a smaller diameter. The larger diameter is used for bending, while the smaller diameter is used for forming. Because the smaller diameter is spaced from the closed loop of the surrounding portion 3, the surrounding portion 3 is positioned inside the rubber lug after forming.

[0085] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, can make equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, which should be covered by the scope of protection of the present invention.

Claims

1. A rapid vulcanization molding process for a split rubber track, characterized by: include: Step S1: Preparation of reinforcement tape (100): The four connecting portions (2) are arranged in parallel in groups of two, the central portion (1) is fixed equidistantly above the connecting portion (2) to form the reinforcing belt (100), and the portion of the connecting portion (2) located between two adjacent central portions (1) is the surrounding portion (3); Step S2: Cutting: The cutting device cuts the surrounding portion (3) with the central portion (1) as the center, the cutting ends of the two surrounding portions (3) in the same group are opposite, and the cutting points of the two groups of surrounding portions (3) are symmetrically distributed with the central dividing line (5) as the center line; Step S3: Wrapping connection: A center pin (4) is inserted along the side wall of the center portion (1), the movable end of the surrounding portion (3) surrounds the center pin (4), the movable end of the surrounding portion (3) is fixedly connected to the center portion (1) to form a closed loop, and the center portion (1), the surrounding portion (3), and the center pin (4) constitute a vulcanization molding reinforcement unit (200); Step S4: Rubber injection vulcanization: The vulcanization molding reinforcement unit (200) is placed in the mold cavity, the center pin (4) is in closed-loop contact with the surrounding portion (3), rubber is injected into the mold cavity, and the rubber wraps the vulcanization molding reinforcement unit (200) through vulcanization molding.

2. The rapid vulcanization molding process of a split rubber crawler according to claim 1, characterized in that: Step S1 is replaced by step S1a, wherein step S1a: four metal strips are used as base strips, the four metal strips are arranged in parallel in groups of two, core metal is fixed equidistantly on top of the metal strips to form the reinforcing strip (100), and the portion of the connecting portion (2) located between two adjacent central portions (1) is the surrounding portion (3).

3. The rapid vulcanization molding process of a split rubber crawler according to claim 2, characterized in that: Step S3 is replaced by step S3a, wherein step S3a comprises inserting the center pin (4) along the side wall of the center portion (1), surrounding the movable ends of the surrounding portions (3) with the center pin (4) as the center, and contacting and fixing the movable ends of the two surrounding portions (3) with each other. The center portion (1), the surrounding portion (3), and the center pin (4) constitute the vulcanization molding reinforcement unit (200).

4. The rapid vulcanization molding process of a split rubber crawler according to claim 1, characterized in that: Replace step S1 with step S1b: Step S1b: Four metal wires are used as a base belt, and the four metal wires are arranged in parallel in groups of two. Metal meshes are fixed equidistantly above the metal wires to form the reinforcement belt (100), and the portion of the metal wire between two adjacent metal meshes is the surrounding portion (3).

5. The rapid vulcanization molding process of a split rubber crawler according to claim 4, characterized in that: Step S3 is replaced by step S3b, wherein the center pin (4) is inserted along the boundary of the metal mesh, and the movable end of the surrounding portion (3) is surrounded with the center pin (4) as the center, and the movable end of the metal wire is fixed at the boundary of the metal mesh. The center portion (1), the surrounding portion (3), and the center pin (4) constitute the vulcanization molding reinforcement unit (200).

6. The rapid vulcanization molding process of a split rubber crawler according to claim 1, characterized in that: Step S3 is changed to step S31: inserting a center pin (4) along the side wall of the center portion (1), and bringing the thick-diameter portion of the center pin (4) into contact with the surrounding portion (3), surrounding the movable end of the surrounding portion (3) with the thick-diameter portion of the center pin (4) as the center, and the movable end of the surrounding portion (3) is fixedly connected to the center portion (1) to form a closed loop, and the center portion (1), the surrounding portion (3), and the center pin (4) constitute the vulcanization molding reinforcement unit (200).

7. The rapid vulcanization molding process for a split rubber crawler according to claim 6, characterized in that: Replace step S4 with step S41, step S41: place the vulcanization molding reinforcement unit (200) in the mold cavity, the center pin (4) moves outward, the thin diameter portion of the center pin (4) is located at the closed loop of the surrounding portion (3), and rubber is injected into the cavity. The thin diameter portion of the center pin (4) and the closed loop of the surrounding portion (3) are spaced apart and are filled with rubber, and the rubber wraps the vulcanization molding reinforcement unit (200) through vulcanization molding.

8. The rapid vulcanization molding process for a split rubber crawler according to claim 5, characterized in that: The metal mesh in step S3b is at least one layer, and the movable end of the surrounding portion (3) is fixed to the metal mesh by winding or welding.

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