Rapid vulcanization forming process of split type rubber track

Abstract

The invention relates to the technical field of crawler belt forming, and particularly discloses a rapid vulcanization forming process of a split type rubber crawler belt, which comprises the following steps: S1, reinforcing belt preparation: four connecting parts are distributed in parallel in pairs, and central parts are fixed above the connecting parts at equal intervals to form reinforcing belts; a cutting device cuts the surrounding part with the center part as the center, S3, turning and winding connection is carried out, a center pin is inserted along the side wall of the center part, and the movable end of the surrounding part surrounds with the center pin as the center; according to the process, a reinforcing structure of the split type rubber track is arranged to be a continuous belt type structure, and the reinforcing belt can integrally move only in a rolling and traction mode. The mold is used for sequentially carrying out segmentation, core insertion, bending, connection, injection molding, vulcanization and core pulling sampling on the reinforcing band. Supporting lug reinforcement of the split type rubber track is achieved, the conveying precision is high, only one precise conveying structure is needed, and cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of crawler forming, and specifically to a rapid vulcanization forming process for a split rubber crawler. Background Art

[0002] The split rubber crawler forms a closed-loop crawler through hinge joints at the ends of the lugs. The advantage of the split rubber crawler is that local damage to the crawler can be replaced. The processing difficulty of the split rubber crawler, compared with that of the closed-loop crawler, requires independent processing and vulcanization.

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

[0004] During the processing of the split rubber crawler, rubber injection vulcanization forming can be adopted. The metal core or the tensile layer is placed in the mold cavity, and the molten material is injected into the cavity. After the molten material is solidified and formed, the molten material coats the metal core or the tensile layer.

[0005] The split rubber crawler disassembles a closed-loop crawler into multiple independent units, and the independent units are not conducive to continuous processing. Compared with the array vulcanization mold of the closed-loop crawler, the closed-loop crawler has a belt body composed of a closed-loop metal core or a tensile layer. The conveying mechanism can drive the closed-loop belt body to move by wheel drive, and two-stage or one-piece vulcanization forming can be realized. Since there is no connection relationship between the split rubber crawlers, more mature conveying equipment is required for the split rubber crawlers. The conveying equipment independently conveys each metal core or tensile layer into an independent mold, such as a robotic arm. Since the number of split rubber crawlers is large, if each robotic arm independently controls the material conveying of a mold, a large number of robotic arms are required, resulting in an increase in maintenance costs and usage costs.

[0006] The Chinese patent discloses a rubber injection molding vulcanization production line (CN107618143A), which transports the rubber injection mold into a flat vulcanizer in a linear conveying manner. This patent solves the conveying problem of mold vulcanization through the linear motion conveying method, but does not solve the problem of conveying the metal core of the split rubber crawler into the forming mold caused by the large number of split rubber crawlers. Summary of the Invention

[0007] The object of the present invention is to provide a rapid vulcanization and forming process for a split rubber crawler. By preparing the reinforcing structure of the split rubber crawler in the form of a belt, the reinforcing belt enters the linear mold in a wound form. After the reinforcing belt reaches the mold position, the surrounding part is cut, and the central pin bends and supports the surrounding part to form a closed loop, and the surrounding part and the central part are fixedly connected. The reinforcing belt is converted into multiple independent vulcanization and forming reinforcing units in the cavity for forming and vulcanizing, which is convenient for continuous processing and conveying. The distance between two central parts is fixed, the distance between the linearly distributed molds is fixed, and the reinforcing belt only needs to be quantitatively wound to achieve the alignment of multiple central parts and the molds. The conveying accuracy is high and only one precise conveying structure needs to be used, reducing costs and solving the problems raised in the above background technology.

[0008] To achieve the above object, the present invention provides the following technical solutions: A rapid vulcanization and forming process for a split rubber crawler, comprising: Step S1: Preparation of the reinforcing belt: Four connecting parts are distributed in parallel in pairs, and the central parts are fixedly arranged at equal intervals above the connecting parts to form the reinforcing belt. The part of the connecting part between two adjacent central parts is the surrounding part; Step S2: Cutting: The cutting device cuts the surrounding part 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; Step S3: Winding and connecting: Insert the central pin along the side wall of the central part. The movable end of the surrounding part surrounds with the central pin as the center, and the movable end of the surrounding part is fixedly connected with the central part to form a closed loop. The central part, the surrounding part, and the central pin form a vulcanization and forming reinforcing unit; Step S4: Rubber injection vulcanization: The vulcanization and forming reinforcing unit is placed in the mold cavity. The central pin is in contact with the closed loop of the surrounding part, and rubber is injected into the cavity. The rubber wraps the vulcanization and forming reinforcing unit and is vulcanized and formed.

[0009] As a further scheme of the present invention: Step S1 is replaced by Step S1a. Step S1a: Using four metal belts as the base belts, the four metal belts are distributed in parallel in pairs, and the core metals are fixedly arranged at equal intervals above the metal belts to form the reinforcing belt. The part of the connecting part between two adjacent central parts is the surrounding part.

[0010] As a further solution of the present invention: replace step S3 with step S3a. Step S3a: Insert the center pin along the side wall of the central part, and rotate the movable ends of the surrounding parts around the center pin. The movable ends of the two surrounding parts are in contact and fixed to each other. The central part, the surrounding parts, and the center pin form the vulcanization molding reinforcement unit.

[0011] As a further solution of the present invention: replace step S1 with step S1b. Step S1b: Use four metal wires as the base band. The four metal wires are distributed in parallel in pairs. A metal mesh is fixedly arranged above the metal wires at equal intervals to form the reinforcement band. The part of the metal wire between two adjacent metal meshes is the surrounding part.

[0012] As a further solution of the present invention: replace step S3 with step S3b. Step S3b: Insert the center pin along the boundary of the metal mesh, and rotate the movable ends of the surrounding parts around the center pin. The movable ends of the metal wires are fixed at the boundary of the metal mesh. The central part, the surrounding parts, and the center pin form the vulcanization molding reinforcement unit.

[0013] As a further solution of the present invention: change step S3 to step S31. Step S31: Insert the center pin along the side wall of the central part, and make the thick diameter part of the center pin contact with the surrounding part. Rotate the movable ends of the surrounding parts around the thick diameter part of the center pin. The movable ends of the surrounding parts are fixedly connected to the central part to form a closed loop. The central part, the surrounding parts, and the center pin form the vulcanization molding reinforcement unit.

[0014] As a further solution of the present invention: replace step S4 with step S41. Step S41: Place the vulcanization molding reinforcement unit in the mold cavity. The center pin moves outward. The thin diameter part of the center pin is located at the closed loop of the surrounding part. Inject rubber into the cavity. There is a gap between the thin diameter part of the center pin and the closed loop of the surrounding part and rubber is injected there. The rubber wraps the vulcanization molding reinforcement unit and is formed by vulcanization.

[0015] As a further solution of the present invention: the metal mesh in step S3b is at least 1 layer, and the movable ends of the surrounding parts are wound and fixed or welded and fixed to the metal mesh.

[0016] Compared with the prior art, the beneficial effects of the present invention are: This process sets the reinforcement structure of the split rubber track as a continuous belt structure. The reinforcement belt can achieve the overall movement of the reinforcement belt only through the forms of winding and traction. The mold is used to successively divide, insert cores, bend, connect, injection mold, vulcanize, and extract core samples for the reinforcement belt. It realizes the reinforcement of the lugs of the split rubber track. At the same time, multi-station synchronous conveying can be achieved without a robotic arm. The conveying accuracy is high and only one precise conveying structure is needed, reducing costs. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following-described drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic diagram of the processing of the core metal split track in a rapid vulcanization and molding process for a split rubber track; Figure 2 It is a schematic diagram of the processing of the layer split track in a rapid vulcanization and molding process for a split rubber track; Figure 3 It is a schematic diagram of converting the belt body into independent units in a rapid vulcanization and molding process for a split rubber track; Figure 4 It is a schematic diagram of steps S31 and S41 in a rapid vulcanization and molding process for a split rubber track; In the figure: 1, central part; 2, connecting part; 3, surrounding part; 4, central pin; 5, central dividing line; 100, reinforcement belt; 200, vulcanization molding reinforcement unit. Detailed Embodiments

[0019] Please refer to Figures 1-4 : Embodiment 1:

[0020] Step S1: Preparation of the reinforcement belt 100: Four connecting parts 2 are distributed in parallel in pairs. The central part 1 is fixedly arranged above the connecting parts 2 at equal intervals to form the reinforcement belt 100. The part of the connecting part 2 between two adjacent central parts 1 is the surrounding part 3; Step S2: Cutting: The cutting device cuts the surrounding part 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; Step S3: Winding and connecting: Insert the center pin 4 along the side wall of the central part 1. The movable end of the surrounding part 3 rotates around the center pin 4. The movable end of the surrounding part 3 is fixedly connected to the central part 1 to form a closed loop. The central part 1, the surrounding part 3, and the center pin 4 form a vulcanization molding reinforcement unit 200. Step S4: Rubber injection vulcanization: Place the vulcanization molding reinforcement unit 200 in the mold cavity. The center pin 4 is in closed-loop contact with the surrounding part 3. Inject rubber into the cavity. The rubber wraps around the vulcanization molding reinforcement unit 200 and is vulcanized.

[0021] Solution: Set the reinforcement structure of the split rubber crawler as a continuous belt structure. The reinforcement belt 100 can achieve the overall movement of the reinforcement belt 100 only by means of winding and traction. Use the mold to sequentially divide, insert the core, bend, connect, injection mold, vulcanize, and core-pulling and sampling of the reinforcement belt 100. Multi-station synchronous conveying can be achieved without a robotic arm, and the conveying accuracy is high.

[0022] Division: The existing molding mold forms a closed cavity by closing the upper and lower molds. Cutting ports are set on the upper and lower molds to complete cutting during the mold closing process.

[0023] Insert the core: 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 central part 1 and the surrounding part 3.

[0024] Bending and connection: The bending driving part only needs to push the surrounding part 3 to move around the center pin 4, and use permanent fixing methods such as laser welding, winding, or snap fixation to fix the surrounding part 3 and the central part 1.

[0025] For injection molding and vulcanization, a rubber injection vulcanization integrated machine or separate molding and vulcanization can be used.

[0026] Core-pulling and sampling: After the surrounding part 3 forms a closed loop, the rubber forms an annular lug belt hole structure after cooling through the surrounding part 3. The center pin 4 is not conducive to demolding, so the center pin 4 needs to move in the reverse direction to pull out the core.

[0027] Advantages: Prepare the reinforcement structure of the split rubber crawler into a belt type, and use the winding form to make the reinforcement belt 100 enter the linear mold. After the reinforcement belt 100 reaches the mold position, cut the surrounding part 3, and the center pin 4 bends and supports the surrounding part 3 to form a closed loop. The surrounding part 3 is fixedly connected to the central part 1. The reinforcement belt 100 is converted into multiple independent vulcanization molding reinforcement units 200 for molding and vulcanization in the cavity. Continuous processing and conveying are convenient. The distance between the two central parts 1 is fixed, and the distance between the linearly distributed molds is fixed. The reinforcement belt 100 only needs to be quantitatively wound to achieve the alignment of multiple central parts 1 and the mold. The conveying accuracy is high and only one precise conveying structure needs to be used, reducing costs.

[0028] Example Two:

[0029] Step S1a: Preparation of the reinforcing belt 100: Taking four metal belts as the base belts, the four metal belts are distributed in parallel in pairs, and the core metals are fixedly arranged above the metal belts at equal intervals to form the reinforcing belt 100. The part of the connecting part 2 between two adjacent central parts 1 is the surrounding part 3.

[0030] Step S2: Cutting: The cutting device cuts the surrounding part 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; Step S3a: Winding and connecting: Insert the central pin 4 along the side wall of the central part 1, and wind the movable ends of the surrounding part 3 around the central pin 4. The movable ends of the two surrounding parts 3 are in contact and fixed to each other. The central part 1, the surrounding part 3, and the central pin 4 form a vulcanized and formed reinforcing unit 200; Step S4: Rubber injection and vulcanization: The vulcanized and formed reinforcing unit 200 is placed in the mold cavity. The central pin 4 is in closed-loop contact with the surrounding part 3. Rubber is injected into the cavity, and the rubber wraps the vulcanized and formed reinforcing unit 200 and is vulcanized and formed.

[0031] This embodiment solves the forming of the core metal rubber track. Please refer to Figure 1 . The metal belts are distributed in pairs, and the core metals are distributed at equal intervals on the surface of the metal belts. The metal belts and the core metals are connected by permanent fixing methods such as welding and screw connection.

[0032] The lugs of the split rubber track are staggered. Therefore Figure 1 The red line part in is the cutting opening. After the metal belt is cut, the surrounding part 3 has a movable end and a fixed end. The surrounding part 3 bends the movable end through the central pin 4, and the movable ends of the two surrounding parts 3 are in contact and are connected by any permanent fixing method such as laser welding or snap fixing. After the closed-loop surrounding part 3 is fixed to the connecting part 2, the central pin 4 seals the closed-loop bending end of the surrounding part 3. When the vulcanized and formed reinforcing unit 200 after forming is subjected to rubber injection and vulcanization forming, the lug holes are reserved. The finally formed shape of the vulcanized and formed reinforcing unit 200 is adjusted by the shape of the mold cavity.

[0033] Supplementary note: After the movable ends of the surrounding part 3 are fixed to each other, if you want to increase the stability of the connection between the surrounding part 3 and the core metal, you only need to weld the area of the closed-loop structure of the surrounding part 3 except the part closed by the central pin 4 to the surface of the core metal.

[0034] Example Three:

[0035] Step S1b: Preparation of the reinforcement belt 100: Using four metal wires as the base belt, the four metal wires are distributed in parallel in pairs, and the metal meshes are fixedly arranged at equal intervals above the metal wires to form the reinforcement belt 100. The part of the metal wire located between two adjacent metal meshes is the surrounding part 3; Step S2: Cutting: The cutting device cuts the surrounding part 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; Step S3b: Winding and connecting: Insert the central pin 4 along the boundary of the metal mesh, and wind the movable end of the surrounding part 3 around the central pin 4. The movable end of the metal wire is fixed at the boundary of the metal mesh. The central part 1, the surrounding part 3, and the central pin 4 form the vulcanization-molding reinforcement unit 200; Step S4: Rubber injection and vulcanization: The vulcanization-molding reinforcement unit 200 is placed in the mold cavity. The central pin 4 is in closed-loop contact with the surrounding part 3. Rubber is injected into the cavity, and the rubber wraps the vulcanization-molding reinforcement unit 200 and is vulcanized.

[0036] This embodiment is for the preparation of small rubber crawlers. For crawlers with low required strength, a tensile layer can be laid inside the rubber during the processing of such crawlers to meet the use requirements. This embodiment has a better effect on the preparation of small rubber crawlers because the tensile layer of small rubber crawlers can choose a metal mesh. Thanks to the deformation ability of the metal mesh, the prepared reinforcement belt 100 has a better storage effect and occupies a small volume.

[0037] For the preparation of small rubber crawlers, using four metal wires as the base belt, the metal meshes are fixedly arranged at equal intervals above the metal wires to form the reinforcement belt 100. The movable end of the metal wire is fixed at the boundary of the metal mesh. The metal mesh in step S3b is at least 1 layer, and the movable end of the surrounding part 3 is fixedly wound or welded with the metal mesh. The number of layers of the metal mesh is adjusted according to requirements. The metal wire and the metal mesh can be fixed by welding or by winding.

[0038] Embodiment 4:

[0039] S1: Preparation of the reinforcement belt 100: Four connecting parts 2 are distributed in parallel in pairs, and the central part 1 is fixedly arranged at equal intervals above the connecting parts 2 to form the reinforcement belt 100. The part of the connecting part 2 located between two adjacent central parts 1 is the surrounding part 3; S2: Cutting: The cutting device cuts the surrounding part 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; S31: Winding and connecting: Insert the center pin 4 into the side wall of the central part 1, and make the thick-diameter part of the center pin 4 contact with the surrounding part 3. The movable end of the surrounding part 3 revolves around the thick-diameter part of the center pin 4. The movable end of the surrounding part 3 is fixedly connected to the central part 1 to form a closed loop. The central part 1, the surrounding part 3, and the center pin 4 form a vulcanization molding reinforcement unit 200. Step S41: Rubber injection vulcanization: Place the vulcanization molding reinforcement unit 200 in the mold cavity. The center pin 4 moves outward. The thin-diameter part of the center pin 4 is located at the closed loop of the surrounding part 3. Inject rubber into the cavity. There is a gap between the thin-diameter part of the center pin 4 and the closed loop of the surrounding part 3 and rubber is injected there. The rubber-wrapped vulcanization molding reinforcement unit 200 is vulcanized and formed.

[0040] In Embodiments 1-3, the surrounding part 3 is in contact with the center pin 4. After the surrounding part 3 is in contact with the center pin 4 and the final forming and core pulling are completed, the surrounding part 3 is located on the inner wall surface of the formed lug.

[0041] In this embodiment, the surrounding part 3 is adjusted to the inside of the formed lug, and Step S31 and Step S41 replace Step S3 and Step S4.

[0042] In this embodiment, the center pin 4 is changed to a stepped type. The stepped center pin 4 has a thick diameter and a thin diameter. The thick diameter is used during bending, and the thin diameter is used during forming. Since there is a gap between the thin diameter and the closed loop of the surrounding part 3, the formed surrounding part 3 will be located inside the rubber lug after forming.

[0043] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A rapid vulcanization forming process for a split rubber track, characterized in that: Including: Step S1: Preparation of the reinforcement belt (100): Four connecting parts (2) are distributed in parallel in pairs, and the central part (1) is fixedly arranged above the connecting parts (2) at equal intervals to form the reinforcement belt (100). The part of the connecting part (2) between two adjacent central parts (1) is the surrounding part (3); Step S3: Cutting: The cutting device cuts the surrounding part (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; Step S3: Winding and connecting: Insert the central pin (4) along the side wall of the central part (1). The movable end of the surrounding part (3) winds around the central pin (4). The movable end of the surrounding part (3) is fixedly connected to the central part (1) to form a closed loop. The central part (1), the surrounding part (3), and the central pin (4) form a vulcanized and molded reinforcement unit (200); Step S4: Rubber injection and vulcanization: The vulcanized and molded reinforcement unit (200) is placed in the mold cavity. The central pin (4) is in closed contact with the surrounding part (3). Rubber is injected into the cavity, and the rubber wraps the vulcanized and molded reinforcement unit (200) and is vulcanized and molded.

2. The rapid vulcanization molding process of a split rubber track according to claim 1, characterized in that: Replace Step S1 with Step S1a. Step S1a: Using four metal strips as the base strips, the four metal strips are distributed in parallel in pairs, and the core metal is fixedly arranged above the metal strips at equal intervals to form the reinforcement belt (100). The part of the connecting part (2) between two adjacent central parts (1) is the surrounding part (3).

3. A rapid vulcanization and forming process for a split rubber track according to claim 2, characterized in that: Replace Step S3 with Step S3a. Step S3a: Insert the central pin (4) along the side wall of the central part (1), and wind the movable end of the surrounding part (3) around the central pin (4). The movable ends of the two surrounding parts (3) are in contact and fixed to each other. The central part (1), the surrounding part (3), and the central pin (4) form the vulcanized and molded reinforcement unit (200).

4. A rapid vulcanization and molding process for a split rubber track according to claim 1, characterized in that: Replace Step S1 with Step S1b: Step S1b: Using four metal wires as the base strips, the four metal wires are distributed in parallel in pairs, and the metal mesh is fixedly arranged above the metal wires at equal intervals to form the reinforcement belt (100). The part of the metal wire between two adjacent metal meshes is the surrounding part (3).

5. A rapid vulcanization and forming process for a split rubber track according to claim 4, characterized in that: Replace Step S3 with Step S3b. Step S3b: Insert the central pin (4) along the boundary of the metal mesh, and wind the movable end of the surrounding part (3) around the central pin (4). The movable end of the metal wire is fixed at the boundary of the metal mesh. The central part (1), the surrounding part (3), and the central pin (4) form the vulcanized and molded reinforcement unit (200).

6. The rapid vulcanization forming process of a split rubber track according to claim 1, characterized in that: Change step S3 to step S31: Insert the center pin (4) along the side wall of the central part (1), and bring the thick-diameter part of the center pin (4) into contact with the surrounding part (3). Rotate the movable end of the surrounding part (3) around the thick-diameter part of the center pin (4). The movable end of the surrounding part (3) is fixedly connected to the central part (1) to form a closed loop. The central part (1), the surrounding part (3), and the center pin (4) constitute the vulcanization molding reinforcement unit (200).

7. A rapid vulcanization forming process for a split rubber track 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 part of the center pin (4) is located at the closed loop of the surrounding part (3). Inject rubber into the cavity. There is a gap between the thin-diameter part of the center pin (4) and the closed loop of the surrounding part (3) and rubber is injected there. The rubber wraps the vulcanization molding reinforcement unit (200) and is formed by vulcanization.

8. A rapid vulcanization forming process for a split rubber track according to claim 5, characterized in that: The metal mesh in step S3b is at least 1 layer. The movable end of the surrounding part (3) is wound and fixed or welded and fixed to the metal mesh.

Images