Core mold for producing rubber pipeline

Abstract

The utility model relates to the technical field of rubber pipe machining, and one embodiment of the utility model provides a core mold for producing a rubber pipeline, the core mold comprises an in-mold pipe, a supporting inner core is arranged in the in-mold pipe, a supporting adjusting assembly is arranged in the in-mold pipe, and a protective supporting assembly is arranged on the outer side wall of the in-mold pipe; the supporting adjusting assembly comprises a connecting block, an arc-shaped connector is arranged at the tail end of the swing rod, an arc-shaped connecting piece is connected to the arc-shaped connector through a pin shaft, a short connecting rod is arranged at the tail end of the arc-shaped connecting piece, and a supporting shaft is arranged at the tail end of the short connecting rod. By means of the technical scheme, a series of problems that in traditional rubber pipeline production in the prior art, a core mold serves as a key component, and production is restricted are solved, the early-stage core mold is simple in structure and usually adopts integral rigid design, when rubber pipelines in complex shapes are produced, demolding is difficult, and the uniformity of the wall thickness of the pipelines is difficult to guarantee; and the rejection rate is high.

Description

Technical Field

[0001] The embodiments of this disclosure relate to the field of rubber hose processing technology, and more specifically, to a mandrel for producing rubber hoses. Background Technology

[0002] Rubber hoses are widely used in many fields, such as fuel, cooling and braking systems in automobile manufacturing, media transportation in petrochemicals, and special pipeline requirements in high-end fields such as aerospace. Their production quality and efficiency are directly related to the product performance and cost of downstream industries.

[0003] In traditional rubber hose production, the mandrel, as a key component, faces a series of production constraints. Early mandrels had simple structures and often adopted an integral rigid design. When faced with the production of rubber hoses with complex shapes, demolding was difficult, and it was hard to ensure the uniformity of the hose wall thickness, resulting in a high scrap rate. For example, when producing rubber hoses with irregular structures such as diameter changes and bends, this type of mandrel could not meet the molding requirements, which greatly limited the diversification of products.

[0004] From a production process perspective, conventional mandrels provide insufficient support stability for rubber tube blanks during vulcanization. Under high temperature and high pressure, the tube blanks are prone to defects such as deformation and bulging, affecting product quality. Moreover, traditional mandrels are mostly single-function and cannot adapt to different rubber material properties and changes in production process parameters. For some new rubber materials, such as high temperature resistant and strong corrosion resistant rubbers, the requirements for the thermal stability and chemical resistance of the mandrel during processing are extremely high, which ordinary mandrels cannot meet.

[0005] In addition, with the increasing demand for rubber hoses due to industrial development, production efficiency has become a prominent issue. Traditional mandrel loading, unloading, and cleaning are cumbersome, and changing mandrels of different specifications is time-consuming, which seriously restricts the production rhythm. In large-scale production scenarios, frequent mandrel adjustment operations lead to long equipment downtime and a significant increase in production costs. Utility Model Content

[0006] To overcome the above-mentioned defects, the embodiments of this disclosure provide a mandrel for producing rubber hoses, which solves the technical problems that exist in the production of traditional rubber hoses in the prior art, where the mandrel is a key component and there are a series of production constraints. Early mandrels had simple structures and often adopted an integral rigid design. When faced with the production of rubber hoses with complex shapes, demolding was difficult and it was difficult to ensure the uniformity of the hose wall thickness, resulting in a high scrap rate.

[0007] According to one aspect, at least one embodiment of the present disclosure provides a mandrel for producing rubber tubing, comprising:

[0008] An inner tube, wherein a supporting inner core is provided inside the inner tube;

[0009] A support and adjustment assembly is disposed inside the mold tube;

[0010] A protective support assembly is disposed on the outer side wall of the inner tube;

[0011] The support adjustment assembly includes a connecting block disposed on the side wall of the inner core of the support. A swing rod is pinned to the connecting block, and an arc-shaped connector is provided at the end of the swing rod. An arc-shaped connecting piece is pinned to the arc-shaped connector, and a connecting short rod is provided at the end of the arc-shaped connecting piece. A support shaft is provided at the end of the connecting short rod.

[0012] As a further technical solution, the inner wall of the mold tube is provided with a positioning hole, one end of the support shaft is inserted into the positioning hole, and a limiting plate is provided at the end of the support shaft inserted into the positioning hole, the limiting plate being in contact with the mold tube.

[0013] As a further technical solution, the protective support assembly includes a high-temperature protective cover, which is disposed on the outer side wall of the inner tube. A support cavity is provided between the high-temperature protective cover and the inner tube. One end of the support shaft is inserted into the support cavity, and a support piece is provided at the end of the support shaft. The support piece is embedded inside the high-temperature protective cover.

[0014] As a further technical solution, the high-temperature protective cover has a circular structure, the supporting plate matches the internal structure of the high-temperature protective cover, the number of supporting plates is several, and multiple supporting plates are spliced ​​together to form a circular structure.

[0015] As a further technical solution, the high-temperature protective cover is made of high-temperature resistant high-temperature vulcanized silicone rubber, and the edge of the high-temperature protective cover is sealed and bonded to the outer wall of the inner tube.

[0016] As a further technical solution, the number of positioning holes is several, and the multiple positioning holes are evenly distributed on the inner sidewall of the mold tube, with a support shaft inserted into each positioning hole.

[0017] As a further technical solution, the high-temperature protective cover is fitted around the outer wall of the inner tube, and the high-temperature protective cover is in a pleated state and supported by the supporting piece.

[0018] As a further technical solution, the number of connecting blocks is several, and the multiple connecting blocks are evenly distributed along the circumference of the side wall of the supporting inner core, and the position of the connecting blocks corresponds to the position of the positioning hole.

[0019] The beneficial effects of the embodiments disclosed herein are as follows:

[0020] 1. In this disclosure, the support adjustment component can flexibly adjust the position and angle of the support shaft. Through the coordinated action of components such as connecting blocks and swing rods, it can accurately support the inner tube according to the different shapes and size requirements of the rubber tubing. When producing irregularly shaped rubber tubing, it can also ensure that the tube blank is subjected to uniform stress during vulcanization, avoiding problems such as deformation and uneven wall thickness, effectively improving the molding accuracy and quality of the rubber tubing. At the same time, the high-temperature protective cover of the protective support component is made of high-temperature resistant high-temperature vulcanized silicone rubber. In the high-temperature environment of rubber tubing vulcanization, it can provide reliable protection for the inner tube, preventing external factors from damaging the inner tube and further ensuring the molding quality of the product.

[0021] 2. In this disclosure, the modular design of the support adjustment component makes the installation, disassembly and replacement of each component more convenient. When producing rubber pipes of different specifications, the new production requirements can be quickly adapted by simply adjusting the position and parameters of the support adjustment component, reducing the time cost of core mold replacement and improving the utilization rate of the equipment. The high temperature protective cover of the protective support component is in a pleated state when not in operation, which occupies little space and facilitates the storage and transportation of the core mold. When in operation, it is quickly supported by the support plate. The operation process is simple and efficient, which helps to speed up the production pace and improve the overall production efficiency. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0023] Figure 1 This is a schematic diagram of a structure in one embodiment of the present disclosure;

[0024] Figure 2 This is a cross-sectional view of the in-mold tube of this disclosure;

[0025] Figure 3 This is a side view of the supporting inner mandrel of this disclosure;

[0026] Figure 4 This is an isometric view of the swing arm disclosed herein;

[0027] In the diagram: 1. Inner tube; 2. Support core; 3. Support adjustment assembly; 3-1. Connecting block; 3-2. Swing rod; 3-3. Arc-shaped connector; 3-4. Arc-shaped connecting piece; 3-5. Connecting short rod; 3-6. Support shaft; 3-7. Positioning hole; 3-8. Limiting plate; 4. Protective support assembly; 4-1. High-temperature protective cover; 4-2. Support cavity; 4-3. Support piece. Detailed Implementation

[0028] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0029] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0030] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0031] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0032] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0033] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0034] like Figures 1-4 As shown, it illustrates a mandrel for producing rubber tubing according to this disclosure, characterized in that it comprises:

[0035] The inner tube 1 has a supporting inner core 2 inside it;

[0036] Support adjustment component 3 is disposed inside the mold tube 1;

[0037] Protective support component 4 is disposed on the outer side wall of the inner tube 1;

[0038] The support adjustment assembly 3 includes a connecting block 3-1, which is disposed on the side wall of the support inner core 2. A swing rod 3-2 is pin-connected to the connecting block 3-1. An arc-shaped connector 3-3 is provided at the end of the swing rod 3-2. An arc-shaped connecting piece 3-4 is pin-connected to the arc-shaped connector 3-3. A connecting short rod 3-5 is provided at the end of the arc-shaped connecting piece 3-4. A support shaft 3-6 is provided at the end of the connecting short rod 3-5.

[0039] The protective support assembly 4 includes a high-temperature protective cover 4-1, which is disposed on the outer wall of the inner tube 1. A support cavity 4-2 is provided between the high-temperature protective cover 4-1 and the inner tube 1. One end of the support shaft 3-6 is inserted into the support cavity 4-2, and a support piece 4-3 is provided at the end of the support shaft 3-6. The support piece 4-3 is embedded inside the high-temperature protective cover 4-1.

[0040] In some examples, the inner support core 2 is carefully placed at the center of the inner mold tube 1, so that the inner support core 2 can stably support the inner mold tube 1, providing a foundation for the subsequent installation of the support adjustment assembly 3. According to the design requirements, multiple connecting blocks 3-1 are evenly distributed around the side wall of the inner support core 2. The position of the connecting blocks 3-1 should accurately correspond to the position of the positioning holes 3-7 on the inner side wall of the inner mold tube 1. Use a suitable connection method (such as welding or high-strength bolt connection) to ensure that the connecting blocks 3-1 are tightly fixed to the inner support core 2 and will not loosen during subsequent work. Arc-shaped connector 3-3, arc-shaped connecting piece 3-4, and connecting short rod are also included. 3-5 Installation: Install the arc-shaped connector 3-3 at the end of the swing rod 3-2, also using a pin connection to ensure the flexibility of the connection. Next, connect one end of the arc-shaped connecting piece 3-4 to the arc-shaped connector 3-3 through a pin, and connect the other end to the connecting short rod 3-5. Install the support shaft 3-6 at the end of the connecting short rod 3-5. The entire connection process must ensure that all components are firmly connected and that the movement at the connection point is not obstructed. The support cavity 4-2 is set and connected to the support shaft 3-6: A support cavity 4-2 is formed between the high-temperature protective cover 4-1 and the inner tube 1. One end of the support shaft 3-6 is inserted into the support cavity 4-2, and the support piece 4-3 is installed at the end of the support shaft 3-6.

[0041] like Figures 1-4As shown, in this embodiment, the inner wall of the inner tube 1 is provided with a positioning hole 3-7, one end of the support shaft 3-6 is inserted into the positioning hole 3-7, and the end of the support shaft 3-6 inserted into the positioning hole 3-7 is provided with a limiting plate 3-8, which is in contact with the inner tube 1.

[0042] In some examples, one end of the support shaft 3-6 is inserted into the corresponding positioning hole 3-7 on the inner wall of the mold tube 1. A limiting plate 3-8 needs to be installed in advance at the end of the support shaft 3-6 that is inserted into the positioning hole 3-7. The diameter of the limiting plate 3-8 should be larger than the diameter of the positioning hole 3-7 to ensure that the limiting plate 3-8 can contact the mold tube 1 after the support shaft 3-6 is inserted into the positioning hole 3-7, preventing the support shaft 3-6 from coming out of the positioning hole 3-7, and at the same time playing a role in stabilizing the support.

[0043] For example, such as Figure 2 As shown, the high-temperature protective cover 4-1 has a circular structure. The supporting piece 4-3 matches the internal structure of the high-temperature protective cover 4-1. There are several supporting pieces 4-3, and multiple supporting pieces 4-3 are spliced ​​together to form a circular structure.

[0044] In some examples, the shape of the support piece 4-3 matches the internal structure of the high-temperature protective cover 4-1, and there are several support pieces 4-3. Multiple support pieces 4-3 are spliced ​​together to form a circular structure to better fit the inside of the high-temperature protective cover 4-1 and achieve a uniform support effect. When the support shaft 3-6 moves with the movement of the support adjustment component 3, the support piece 4-3 at the end of the support shaft 3-6 will push up the high-temperature protective cover 4-1, so that the high-temperature protective cover 4-1 gradually unfolds from the wrinkled state and is supported to the working state, which plays a protective role on the outer wall of the inner tube 1.

[0045] For example, such as Figure 1 As shown, the high-temperature protective cover 4-1 is made of high-temperature resistant high-temperature vulcanized silicone rubber, and the edge of the high-temperature protective cover 4-1 is sealed and bonded to the outer wall of the inner tube 1.

[0046] In some examples, the high-temperature protective cover 4-1 is made of high-temperature resistant high-temperature vulcanized silicone rubber, and its edge is sealed and bonded to the outer wall of the inner tube 1. The sealing and bonding process must ensure a good sealing effect to prevent gas or other substances from entering the support cavity 4-2 from the connection point during subsequent work, which would affect the normal operation of the protective support component 4.

[0047] For example, such as Figure 2 As shown, there are several positioning holes 3-7, which are evenly distributed on the inner wall of the inner tube 1. Each positioning hole 3-7 is fitted with a support shaft 3-6.

[0048] In some examples, since the number of positioning holes 3-7 is several and evenly distributed on the inner wall of the mold tube 1, each positioning hole 3-7 must be accurately inserted into the corresponding support shaft 3-6 to ensure the stability and uniform force distribution of the entire support adjustment assembly 3.

[0049] For example, such as Figure 2 As shown, the high-temperature protective cover 4-1 is fitted around the outer wall of the inner tube 1, and the high-temperature protective cover 4-1 is in a pleated state and supported by the support piece 4-3.

[0050] In some examples, the high-temperature protective cover 4-1 is fitted around the outer wall of the inner tube 1, initially in a wrinkled state.

[0051] For example, such as Figure 3 As shown, there are several connecting blocks 3-1. Multiple connecting blocks 3-1 are evenly distributed along the circumference on the side wall of the supporting inner core 2. The positions of the connecting blocks 3-1 correspond to the positions of the positioning holes 3-7.

[0052] In some examples, a swing arm 3-2 is connected to each connecting block 3-1 by a pin. During installation, it is necessary to ensure that the pin can rotate flexibly so that the swing arm 3-2 can swing freely around the pin. The length and material of the swing arm 3-2 need to be selected according to the actual working load requirements to ensure that it has sufficient strength and toughness and will not easily deform or break when subjected to external forces.

[0053] When in use, before the production of rubber tubing begins, the core mold is in the initial assembly state, the support shaft 3-6 of the support adjustment component 3 is inserted into the positioning hole 3-7 of the inner tube 1, and the high temperature protective cover 4-1 of the protective support component 4 is in a wrinkled state and has not yet been supported.

[0054] When processing rubber hoses is required, external equipment (such as hydraulic devices or mechanical transmission devices) applies force to the supporting inner core 2, causing it to shift or deform. The movement of the supporting inner core 2 drives the connecting block 3-1 to move. The connecting block 3-1 then causes the swing rod 3-2 to swing through the pin. The swing of the swing rod 3-2 is transmitted to the supporting shaft 3-6 through the arc-shaped connector 3-3, the arc-shaped connecting piece 3-4, and the connecting short rod 3-5, causing the supporting shaft 3-6 to move relative to the positioning hole 3-7. At the same time, the other end of the supporting shaft 3-6 moves in the supporting cavity 4-2, pushing the supporting piece 4-3 to lift the high-temperature protective cover 4-1, thus unfolding the high-temperature protective cover 4-1 and providing protection and support for the production of rubber hoses. During the production process, the position of the supporting adjustment component 3 may need to be adjusted multiple times according to the different process requirements of the rubber hoses to ensure the molding quality of the rubber hoses.

[0055] After the rubber hose is produced, reverse the operation of the external equipment to restore the inner support core 2 to its initial position. The components of the support adjustment assembly 3 also move in the opposite direction. The support shaft 3-6 retracts from the support cavity 4-2, and the support plate 4-3 no longer pushes up the high temperature protective cover 4-1. The high temperature protective cover 4-1 returns to its pleated state. At this time, the core mold can be removed from the production equipment for subsequent cleaning, maintenance and other work to prepare for the next production.

[0056] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A mandrel for producing rubber hoses, characterized in that, include: The inner tube (1) is provided with a supporting inner core (2) inside the inner tube (1); A support adjustment assembly (3) is disposed inside the mold tube (1); A protective support assembly (4) is disposed on the outer side wall of the inner tube (1); The support adjustment assembly (3) includes a connecting block (3-1), which is disposed on the side wall of the support inner core (2). A swing rod (3-2) is pin-connected to the connecting block (3-1). An arc-shaped connector (3-3) is disposed at the end of the swing rod (3-2). An arc-shaped connecting piece (3-4) is pin-connected to the arc-shaped connector (3-3). A connecting short rod (3-5) is disposed at the end of the arc-shaped connecting piece (3-4). A support shaft (3-6) is disposed at the end of the connecting short rod (3-5).

2. A mandrel for producing rubber tubing according to claim 1, characterized in that, The inner wall of the mold tube (1) is provided with a positioning hole (3-7). One end of the support shaft (3-6) is inserted into the positioning hole (3-7). A limiting plate (3-8) is provided at the end of the support shaft (3-6) inserted into the positioning hole (3-7). The limiting plate (3-8) is in contact with the mold tube (1).

3. A mandrel for producing rubber tubing according to claim 1, characterized in that, The protective support assembly (4) includes a high-temperature protective cover (4-1), which is disposed on the outer side wall of the inner tube (1). A support cavity (4-2) is provided between the high-temperature protective cover (4-1) and the inner tube (1). One end of the support shaft (3-6) is inserted into the support cavity (4-2), and a support piece (4-3) is provided at the end of the support shaft (3-6). The support piece (4-3) is embedded inside the high-temperature protective cover (4-1).

4. A mandrel for producing rubber tubing according to claim 3, characterized in that, The high-temperature protective cover (4-1) has a circular structure. The supporting piece (4-3) matches the internal structure of the high-temperature protective cover (4-1). There are several supporting pieces (4-3), and multiple supporting pieces (4-3) are spliced ​​together to form a circular structure.

5. A mandrel for producing rubber tubing according to claim 3, characterized in that, The high-temperature protective cover (4-1) is made of high-temperature resistant high-temperature vulcanized silicone rubber, and the edge of the high-temperature protective cover (4-1) is sealed and bonded to the outer wall of the inner tube (1).

6. A mandrel for producing rubber tubing according to claim 2, characterized in that, The number of positioning holes (3-7) is several, and the multiple positioning holes (3-7) are evenly distributed on the inner sidewall of the mold tube (1). Each positioning hole (3-7) is fitted with a support shaft (3-6).

7. A mandrel for producing rubber tubing according to claim 3, characterized in that, The high-temperature protective cover (4-1) is fitted around the outer wall of the inner tube (1) and is pleated by the support piece (4-3).

8. A mandrel for producing rubber tubing according to claim 2, characterized in that, The number of connecting blocks (3-1) is several, and the multiple connecting blocks (3-1) are evenly distributed along the circumference of the side wall of the supporting inner core (2). The position of the connecting block (3-1) corresponds to the position of the positioning hole (3-7).

Images