A rubber extrusion online continuous cloth wrapping die head

Abstract

The present invention belongs to the technical field of cloth-wrapped rubber production, and proposes a rubber extrusion online continuous cloth-wrapping die head, including a first mold, a first mounting groove is arranged inside the first mold, the front end of the first mounting groove is arranged in an arc shape, and the arc shape of the front end of the first mounting groove is eccentrically arranged with the first mounting groove; a second mold, a second mounting groove is arranged inside the second mold, the second mounting groove has the same radius as the first mounting groove, and the front end of the second mounting groove is arranged in a rectangular shape. After the first mold and the second mold are installed and positioned, the rectangle of the front end of the second mounting groove smoothly transitions with the arc shape of the front end of the first mounting groove; a mandrel, a rubber guide groove and a cloth-wrapping guide groove are arranged on the mandrel, the front end of the mandrel is conical, the front end of the mandrel is concentrically arranged with the arc shape of the front end of the first mounting groove, and the cloth-wrapping guide groove is arranged along the length direction of the mandrel. Through the above technical scheme, the problem of difficulty in producing cloth-wrapped rubber in the prior art is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of cloth-wrapped rubber production and relates to an online continuous cloth-wrapped die head for rubber extrusion. Background Art

[0002] Rubber refers to a highly elastic polymer material with reversible deformation. It is elastic at room temperature and can produce large deformation under very small external force, and can return to its original shape after the external force is removed. Rubber is a completely amorphous polymer with a low glass transition temperature and a large molecular weight, greater than hundreds of thousands. Early rubber was taken from the latex of plants such as rubber trees and rubber grass. After processing, it was made into a material with elasticity, insulation, impermeability to water and air. It is a highly elastic polymer compound. Rubber products are widely used in industry or all aspects of life. With the development of industrial technology, people have put forward higher and higher requirements on the structure of rubber. Cloth-wrapped rubber is a product with great demand. However, cloth-wrapped rubber is difficult to produce. The main factor restricting its development lies in the structure of the cloth-wrapped rubber production die. In order to meet the needs of market development, there is an urgent need for a simple structure and good processability of rubber extrusion online continuous cloth-wrapped die. Summary of the invention

[0003] The invention provides a rubber extrusion online continuous cloth wrapping die head, which solves the problem of difficulty in producing cloth wrapping rubber in the prior art.

[0004] The technical solution of the present invention is achieved in this way

[0005] A rubber extrusion online continuous cloth wrapping die head, comprising a first die, a first mounting groove is arranged inside the first die, a front end of the first mounting groove is arranged in an arc shape, and the arc shape of the front end of the first mounting groove is arranged eccentrically with the first mounting groove;

[0006] A second mold, wherein a second mounting groove is arranged inside the second mold, the second mounting groove has the same radius as the first mounting groove, the front end of the second mounting groove is arranged to be rectangular, and after the first mold and the second mold are installed and positioned, the rectangle of the front end of the second mounting groove smoothly transitions to the arc of the front end of the first mounting groove;

[0007] A core shaft is provided with a rubber guide groove and a cloth wrapping guide groove, the front end of the core shaft is conical, the front end of the core shaft is concentric with the arc shape of the front end of the first mounting groove, and the cloth wrapping guide groove is arranged along the length direction of the core shaft.

[0008] As a further technical solution, a first rubber inlet is provided in the middle of the first mold, and the first rubber inlet is communicated with the first installation groove.

[0009] As a further technical solution, a second rubber inlet is provided in the middle of the second mold, the second rubber inlet is communicated with the second mounting groove, and the first rubber inlet is communicated with the second rubber inlet and has the same size;

[0010] The rubber guide groove is arranged in a double-sided spiral along the axial direction of the core shaft.

[0011] As a further technical solution, the first rubber inlet and the second rubber inlet are configured to be tapered, and the ends with smaller diameters of the first rubber inlet and the second rubber inlet are communicated with the first mounting groove and the second mounting groove respectively.

[0012] As a further technical solution, a temperature control cavity is arranged inside the core shaft, and a temperature control medium inlet and a temperature control medium outlet are respectively arranged at both ends of the core shaft, and the temperature control medium inlet and the temperature control medium outlet are both communicated with the temperature control cavity.

[0013] As a further technical solution, the core shaft includes a conical portion and a cylindrical portion, and the conical portion and the cylindrical portion are connected via threads.

[0014] As a further technical solution, it also includes a mounting flange, which is arranged at the end with a larger diameter of the first rubber inlet and the second rubber inlet.

[0015] As a further technical solution, a cloth pulling device is also included, and the cloth pulling device includes a first roller and a second roller.

[0016] As a further technical solution, a third roller is also included, and both ends of the longitudinal section of the third roller are U-shaped, and the U mouths are opposite and have the same size.

[0017] The working principle and beneficial effects of the present invention are:

[0018] 1. In the present invention, the core shaft is installed in the first installation cavity formed between the first mold and the second mold, the cloth is fed in from the tail of the first mold and the second mold, and is pulled out from the head of the first mold and the second mold under the guiding action of the cloth wrapping guide groove, and the cloth is in good contact with the arc at the front end of the first installation groove and the rectangle at the front end of the second installation groove, and then molten rubber is injected into the rubber guide groove, the rubber moves along the rubber guide groove and contacts the inner side of the cloth, and when the rubber contacts the inner side of the cloth, the rubber and the cloth move forward synchronously and are transmitted from the head of the first installation groove and the second installation groove, and the cloth is wrapped around the outer side of the rubber to form a P shape, thereby realizing the one-piece molding of the cloth and the rubber, and the structure is simple and easy to realize. The simple structure is used to solve the problem of one-piece molding of the cloth and rubber at the P-type outlet of the mold that has been unresolved in the industry.

[0019] 2. In the present invention, rubber is added into the first installation groove through the first rubber inlet, which makes the addition of rubber more convenient and improves the practicality of the present invention.

[0020] 3. In the present invention, the first rubber inlet and the second rubber inlet are respectively opened on the side where the first mold and the second mold are in contact, so that the first rubber inlet and the second rubber inlet are connected, and the rubber is introduced into the rubber guide groove through the first rubber inlet and the second rubber inlet. The rubber guide groove is spirally arranged on both sides along the axial direction of the core shaft so that the flow of the rubber inside the first mold and the second mold is more uniform, so that the rubber forms a certain pressure in the rubber guide groove, and the extruded rubber is more dense and uniform in contact with the cloth, thereby improving the production quality of the cloth-wrapped rubber.

[0021] 4. In the present invention, the first rubber inlet and the second rubber inlet are both set to be tapered, and the overall rubber inlet formed by the first rubber inlet and the second rubber inlet has a small inner diameter and a large outer diameter, so that the rubber feeding is smoother and more uniform, the structure is simple, and it is easy to implement, which improves the practicality of the present invention.

[0022] 5. In the present invention, a temperature regulating medium is introduced into the temperature regulating chamber. The temperature regulating medium can be cold air or high-temperature gas in the prior art. The temperature of the rubber is regulated by the temperature regulating medium, so that the wrapped rubber forms a stable shape when it is transmitted from the heads of the first mold and the second mold, thereby preventing the shape from being deformed after being transmitted, thereby improving the production quality of the wrapped rubber.

[0023] 6. In the present invention, the conical part and the cylindrical part of the core shaft are connected by threads, so that the core shaft is easy to disassemble and assemble, and is easy to process, thereby improving the practicality of the present invention.

[0024] 7. In the present invention, a mounting flange is installed on the side with a larger diameter of the first rubber inlet and the second rubber inlet. The first mold and the second mold can be conveniently assembled and disassembled from external equipment through the mounting flange, thereby improving the practicality of the present invention.

[0025] 8. In the present invention, after the cloth-wrapped rubber is transmitted from the heads of the first mold and the second mold, the straight section of the P-shaped cross-section of the cloth-wrapped rubber is clamped by the first roller and the second roller, and then the first roller and the second roller are rotated, and the cloth-wrapped rubber is transmitted outward under the action of the friction force of the first roller and the second roller, and at the same time, power is provided for the feeding of the cloth at the tail of the first mold and the second mold.

[0026] 9. In the present invention, a third roller with both ends of the longitudinal section being U-shaped is used to guide the cloth before the cloth enters the first mold and the second mold, ensuring that the cloth is in a U shape after entering the first mold and the second mold, thereby ensuring good wrapping and shaping of the rubber by the cloth, and further improving the production quality of the cloth-wrapped rubber. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0028] Figure 1 It is a schematic diagram of the structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the mandrel installation structure of the present invention;

[0030] Figure 3 This is a schematic diagram of the first mold structure of the present invention;

[0031] Figure 4 This is a schematic diagram of the second mold structure of the present invention;

[0032] Figure 5 It is a schematic diagram of the core shaft structure of the present invention;

[0033] Figure 6 This is a schematic diagram of the cloth wrapping guide groove structure of the present invention;

[0034] In the figure: 1-first mold, 11-first mounting groove, 12-first rubber inlet, 2-second mold, 21-second mounting groove, 22-second rubber outlet, 3-core shaft, 31-rubber guide groove, 32-temperature adjustment chamber, 33-temperature adjustment medium inlet, 34-temperature adjustment medium outlet, 35-conical part, 36-cylindrical part, 37-cloth wrapping guide groove, 4-mounting flange, 5-cloth pulling device, 51-first roller, 52-second roller, 6-third roller. DETAILED DESCRIPTION

[0035] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] like Figures 1 to 6 As shown, a rubber extrusion online continuous cloth wrapping die head includes a first die 1, a first mounting groove 11 is arranged inside the first die 1, the front end of the first mounting groove 11 is arranged in an arc shape, and the arc shape of the front end of the first mounting groove 11 is eccentrically arranged with the first mounting groove 11;

[0037] The second mold 2 has a second mounting groove 21 disposed therein. The second mounting groove 21 has the same radius as the first mounting groove 11. The front end of the second mounting groove 21 is configured to be rectangular. After the first mold 1 and the second mold 2 are installed and positioned, the rectangular shape of the front end of the second mounting groove 21 smoothly transitions to the arc shape of the front end of the first mounting groove 11.

[0038] The core shaft 3 is provided with a rubber guide groove 31 and a cloth wrapping guide groove 37. The front end of the core shaft 3 is conical. The front end of the core shaft 3 is concentric with the arc shape of the front end of the first mounting groove 11. The cloth wrapping guide groove 37 is arranged along the length direction of the core shaft 3.

[0039] In this embodiment, the core shaft 3 is installed in the first installation cavity formed between the first mold 1 and the second mold 2, and the cloth is fed in from the tail of the first mold 1 and the second mold 2, and is pulled out from the head of the first mold 1 and the second mold 2 under the guidance of the cloth wrapping guide groove 37, and the cloth is in complete contact with the arc at the front end of the first installation groove 11 and the rectangle at the front end of the second installation groove 21, and then molten rubber is injected into the rubber guide groove 31, and the rubber moves along the rubber guide groove 31 and contacts the inner side of the cloth. When the rubber contacts the inner side of the cloth, the rubber and the cloth move forward synchronously and are transmitted from the head of the first installation groove 11 and the second installation groove 21. The cloth is wrapped around the outside of the rubber to form a P shape, thereby realizing the one-piece molding of the cloth and the rubber. The structure is simple and easy to implement. The simple structure is used to solve the problem of one-piece molding of cloth and rubber at the P-type outlet of the mold that has been difficult to solve in the industry.

[0040] Furthermore, a first rubber inlet 12 is provided in the middle of the first mold 1 , and the first rubber inlet 12 is communicated with the first mounting groove 11 .

[0041] In this embodiment, rubber is added into the first installation groove 11 through the first rubber inlet 12, which makes the addition of rubber more convenient and improves the practicality of this embodiment.

[0042] Furthermore, a second rubber inlet 22 is provided in the middle of the second mold 2, the second rubber inlet 22 is communicated with the second mounting groove 21, and the first rubber inlet 12 is communicated with the second rubber inlet 22 and has the same size;

[0043] The rubber guide groove 31 is spirally arranged on both sides along the axial direction of the core shaft 3 .

[0044] In this embodiment, the first rubber inlet 12 and the second rubber inlet 22 are respectively opened on the side where the first mold 1 and the second mold 2 contact, so that the first rubber inlet 12 and the second rubber inlet 22 are connected, and the rubber is introduced into the rubber guide groove 31 through the first rubber inlet 12 and the second rubber inlet 22. The rubber guide groove 31 is spirally arranged on both sides along the axial direction of the core shaft 3 so that the flow of the rubber inside the first mold 1 and the second mold 2 is more uniform, so that the rubber forms a certain pressure in the rubber guide groove 31, and the extruded rubber is denser and more evenly contacts the cloth, thereby improving the production quality of the cloth-wrapped rubber.

[0045] Furthermore, the first rubber inlet 12 and the second rubber inlet 22 are configured to be tapered, and the ends of the first rubber inlet 12 and the second rubber inlet 22 with smaller diameters are communicated with the first installation groove 11 and the second installation groove 21 respectively.

[0046] In this embodiment, the first rubber inlet 12 and the second rubber inlet 22 are both set to be tapered, and the inner diameter of the overall rubber inlet formed by the first rubber inlet 12 and the second rubber inlet is small and the outer diameter is large, so that the rubber feeding is smoother and more uniform, the structure is simple, and it is easy to implement, which improves the practicality of this embodiment.

[0047] Furthermore, a temperature regulating chamber 32 is provided inside the core shaft 3 , and a temperature regulating medium inlet 33 and a temperature regulating medium outlet 34 are provided at both ends of the core shaft 3 , respectively. The temperature regulating medium inlet 33 and the temperature regulating medium outlet 34 are both communicated with the temperature regulating chamber 32 .

[0048] In this embodiment, a temperature regulating medium is introduced into the temperature regulating chamber 32. The temperature regulating medium can be cold air or high-temperature gas in the prior art. The temperature of the rubber is regulated by the temperature regulating medium so that the wrapped rubber forms a stable shape when it is transmitted from the heads of the first mold 1 and the second mold 2, thereby preventing the shape from being deformed after being transmitted, thereby improving the production quality of the wrapped rubber.

[0049] Furthermore, the core shaft 3 includes a tapered portion 35 and a cylindrical portion 36 , and the tapered portion 35 and the cylindrical portion 36 are connected via threads.

[0050] In this embodiment, the conical portion 35 and the cylindrical portion 36 of the core shaft 3 are connected by threads, so that the core shaft 3 is easy to disassemble and assemble, and is easy to process, thereby improving the practicality of this embodiment.

[0051] Furthermore, it also includes a mounting flange 4 , which is arranged at the end with a larger diameter of the first rubber inlet 12 and the second rubber inlet 22 .

[0052] In this embodiment, a mounting flange 4 is installed on the side with a larger diameter of the first rubber inlet 12 and the second rubber inlet 22. The first mold 1 and the second mold 2 can be conveniently assembled and disassembled from external equipment through the mounting flange 4, thereby improving the practicality of this embodiment.

[0053] Furthermore, the cloth pulling device 5 is also included. The cloth pulling device 5 includes a first roller 51 and a second roller 52 .

[0054] In this embodiment, after the cloth-wrapped rubber is transmitted from the heads of the first mold 1 and the second mold 2, the straight section of the P-shaped cross-section of the cloth-wrapped rubber is clamped by the first roller 51 and the second roller 52, and then the first roller 51 and the second roller 52 are rotated, and the cloth-wrapped rubber is transmitted outward under the action of the friction force of the first roller 51 and the second roller 52, and at the same time, power is provided for the feeding of the cloth at the tail of the first mold 1 and the second mold 2.

[0055] Furthermore, it also includes a third roller 6, both ends of the longitudinal section of the third roller 6 are U-shaped, the U openings are opposite, and the sizes are the same.

[0056] In this embodiment, a third roller 6 having U-shaped ends at the longitudinal section is used to guide the cloth before the cloth enters the first mold 1 and the second mold 2, ensuring that the cloth is in a U-shape after entering the first mold 1 and the second mold 2, thereby ensuring good wrapping and shaping of the rubber by the cloth, and further improving the production quality of the cloth-wrapped rubber.

[0057] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A rubber extrusion online continuous cloth wrapping die head, characterized in that: It comprises a first mould (1), wherein a first mounting groove (11) is arranged inside the first mould (1), the front end of the first mounting groove (11) is arranged in an arc shape, and the arc shape of the front end of the first mounting groove (11) is arranged eccentrically with the first mounting groove (11); A second mold (2), wherein a second mounting groove (21) is arranged inside the second mold (2), the second mounting groove (21) has the same radius as the first mounting groove (11), the front end of the second mounting groove (21) is arranged in a rectangular shape, and after the first mold (1) and the second mold (2) are installed and positioned, the rectangular shape of the front end of the second mounting groove (21) and the arc shape of the front end of the first mounting groove (11) smoothly transition; A core shaft (3), the core shaft (3) being provided with a rubber guide groove (31) and a cloth wrapping guide groove (37), the front end of the core shaft (3) being conical, the front end of the core shaft (3) being concentrically arranged with the arc shape of the front end of the first mounting groove (11), and the cloth wrapping guide groove (37) being arranged along the length direction of the core shaft (3); a first rubber inlet (12) being arranged in the middle of the first mold (1), the first rubber inlet (12) being communicated with the first mounting groove (11); A second rubber inlet (22) is provided in the middle of the second mold (2), the second rubber inlet (22) is communicated with the second mounting groove (21), and the first rubber inlet (12) is communicated with the second rubber inlet (22) and has the same size; The rubber guide groove (31) is arranged in a double-sided spiral along the axial direction of the core shaft (3), and the rubber moves along the rubber guide groove (31) and contacts the inner side of the cloth; The first rubber inlet (12) and the second rubber inlet (22) are arranged in a conical shape, and the ends with smaller diameters of the first rubber inlet (12) and the second rubber inlet (22) are respectively communicated with the first installation groove (11) and the second installation groove (21); The core shaft (3) comprises a conical portion (35) and a cylindrical portion (36), and the conical portion (35) and the cylindrical portion (36) are connected via threads.

2. A rubber extrusion online continuous cloth wrapping die head according to claim 1, characterized in that: A temperature regulating chamber (32) is arranged inside the core shaft (3), and a temperature regulating medium inlet (33) and a temperature regulating medium outlet (34) are respectively arranged at two ends of the core shaft (3), and the temperature regulating medium inlet (33) and the temperature regulating medium outlet (34) are both communicated with the temperature regulating chamber (32).

3. The rubber extrusion online continuous cloth wrapping die head according to claim 1, characterized in that: It also includes a mounting flange (4), which is arranged at the end with a larger diameter of the first rubber inlet (12) and the second rubber inlet (22).

4. The rubber extrusion online continuous cloth wrapping die head according to claim 1, characterized in that: It also comprises a cloth pulling device (5), wherein the cloth pulling device (5) comprises a first roller (51) and a second roller (52).

5. The rubber extrusion online continuous cloth wrapping die head according to claim 1, characterized in that: It also comprises a third roller (6), both ends of the longitudinal section of the third roller (6) are U-shaped, the U openings are opposite and have the same size.

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