Hose and cable co-extrusion forming die

Abstract

The utility model provides a hose and cable co-extrusion forming die, which relates to the technical field of cable pipeline connection, and comprises a first die and a second die, the inner side of one end of the first die is provided with a feed inlet, the inner cavity of the second die is provided with a straight section outlet, an inverted conical cavity is arranged between the first die and the second die, and the inverted conical cavity is provided with a through hole. A cable inlet is formed in the outer surface of the second mouth mold; according to the utility model, the design of the inverted conical cavity effectively improves the material pressure, ensures the uniform molding of the pipe blank, further optimizes the bonding strength by adjusting the position and angle of the cable inlet, protects the internal structure of the cable, and compared with the traditional glue bonding method, the process eliminates chemical pollution, reduces the production cost, and improves the production efficiency. In addition, the co-extrusion product is uniform in adhesion and smooth in appearance, and the application requirements of high quality and high environmental protection requirements are met.

Description

Technical Field

[0001] This utility model relates to the field of cable and conduit connection technology, and in particular to a co-extrusion molding die for hoses and cables. Background Technology

[0002] During cable laying, the internal wires can easily be exposed due to wear. Using flexible conduit to protect the cable reduces friction on the cable surface, effectively preventing wear on the cable sheath. In this process, the cable is encased inside the conduit, forming a unified structure.

[0003] In existing technologies, the traditional method for attaching cables to conduits using adhesives typically involves bonding the wires to the conduits with glue. However, this method has several drawbacks. First, adhesives often contain harmful chemicals that can easily pollute the environment and fail to meet modern environmental protection requirements. Second, adhesives have low bonding efficiency, which can increase production line operating time and affect overall production efficiency. Furthermore, adhesive bonding has poor stability and is prone to cracking or detachment at the bonding points after prolonged use or when affected by external environmental factors (such as changes in temperature and humidity), affecting the product's lifespan and safety. Moreover, using adhesives requires additional curing time and drying equipment, further increasing production costs. Utility Model Content

[0004] This utility model mainly provides a co-extrusion molding die for hoses and cables that facilitates improved connection stability, reduced costs, and decreased pollution.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a co-extrusion molding die for hoses and cables, comprising a first die and a second die, wherein a feed inlet is provided on the inner side of one end of the first die, a straight section outlet is provided in the inner cavity of the second die, an inverted conical cavity is provided between the first die and the second die, a cable inlet is provided on the outer surface of the second die, both ends of the cable inlet penetrate the second die, an installation port is provided on one side of the top of the second die, the inverted conical cavity is connected to the feed inlet and the straight section outlet respectively, a limiting mechanism is installed on one side of the second die, and the length of the straight section outlet is 1.5-2 times the outer diameter of the second die;

[0006] The limiting mechanism includes a connecting tube and a movable tube. One end of the connecting tube is fixedly connected to the second die, and one end of the movable tube is fixedly connected to a threaded ring. The threaded ring is threadedly connected to the outer surface of the connecting tube, and a plurality of limiting balls are provided in the inner cavity of the connecting tube.

[0007] Preferably, a mounting groove is formed on the outer surface of one end of the connecting pipe, and a compression ball is disposed inside the mounting groove. The pressure port gradually applies pressure to the compression ball, thereby causing the compression ball to displace within the mounting groove.

[0008] Preferably, one end of the compression ball is fixedly connected to a movable rod, and one end of the movable rod passes through the connecting pipe. The compression stroke of the movable rod further pushes the limiting ball to reposition itself, causing the limiting ball to form a limiting state suitable for the current hose size and type.

[0009] Preferably, one end of the movable rod is fixedly connected to the limiting ball, and a compression port is provided inside the movable tube. Multiple movable rods can simultaneously control the redispersing and regrouping of multiple limiting balls.

[0010] Preferably, a spring is provided inside the mounting groove, and the spring is sleeved on the outer surface of the movable rod. The spring force will push the compression ball back to its initial position, while gradually dispersing the multiple limiting balls.

[0011] Preferably, the extrusion ball abuts against the extrusion port, and the spring is located on one side of the extrusion ball. The extrusion ball compresses the spring while being subjected to extrusion force.

[0012] Preferably, a limiting ring is fixedly connected to one end of the connecting pipe, and the outer diameter of the limiting ring is larger than the inner diameter of the threaded ring. This prevents the connecting pipe and the movable pipe from separating.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0014] 1. In this utility model, the design of the inverted conical cavity effectively improves the material pressure and ensures uniform forming of the tube blank. By adjusting the position and angle of the cable inlet, the bonding strength is further optimized, while protecting the internal structure of the cable. Compared with the traditional glue bonding method, this process eliminates chemical pollution, reduces production costs, and has higher environmental protection. In addition, the co-extruded products have uniform bonding and a smooth appearance, meeting the application requirements of high quality and high environmental protection.

[0015] 2. In this utility model, the threaded ring drives the movable tube to move axially, controls the action of the extrusion ball and the spring, thereby flexibly adjusting the position of the limiting ball to achieve precise limiting of the hose. After the limiting adjustment is completed, the limiting ball automatically returns to its initial dispersed state by releasing the extrusion pressure during the winding stage, effectively preventing the hose or cable from being excessively restricted and knotted during winding, and ensuring that the entire winding process is smooth and stable. Attached Figure Description

[0016] Figure 1 A perspective view of a co-extrusion molding die for hoses and cables is provided for this utility model;

[0017] Figure 2 This utility model provides a partial cross-sectional view of a co-extrusion die for hoses and cables;

[0018] Figure 3This utility model provides a schematic diagram of a limiting mechanism for a co-extrusion die for hoses and cables.

[0019] Figure 4 This utility model provides a cross-sectional schematic diagram of a limiting mechanism for a co-extrusion die for hoses and cables.

[0020] Legend: 1. First die; 11. Inverted conical cavity; 12. Inlet; 2. Second die; 21. Straight section outlet; 22. Cable inlet; 23. Mounting port; 3. Limiting mechanism; 31. Movable tube; 311. Threaded ring; 32. Connecting tube; 321. Limiting ring; 33. Extrusion port; 34. Limiting ball; 35. Mounting groove; 36. Spring; 37. Extrusion ball; 38. Movable rod. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0023] Please see Figure 1 - Figure 4 This utility model provides a technical solution: a co-extrusion molding die for hoses and cables, including a first die 1 and a second die 2. The first die 1 has an inlet 12 on the inner side of one end. The second die 2 has a straight section outlet 21 in its inner cavity. An inverted conical cavity 11 is formed between the first die 1 and the second die 2. A cable inlet 22 is formed on the outer surface of the second die 2. Both ends of the cable inlet 22 penetrate the second die 2. An installation port 23 is formed on one side of the top of the second die 2. The inverted conical cavity 11 is connected to the inlet 12 and the straight section outlet 21 respectively. A limit mechanism 3 is installed on one side of the second die 2. The length of the straight section outlet 21 is 1.5-2 times the outer diameter of the second die 2.

[0024] The limiting mechanism 3 includes a connecting tube 32 and a movable tube 31. One end of the connecting tube 32 is fixedly connected to the second die 2. One end of the movable tube 31 is fixedly connected to a threaded ring 311. The threaded ring 311 is threadedly connected to the outer surface of the connecting tube 32. Multiple limiting balls 34 are provided in the inner cavity of the connecting tube 32.

[0025] During the co-extrusion process of the hose and cable, the molten material is extruded through an external extruder screw, allowing it to enter the equipment from the feed port 12. Subsequently, the molten material enters the inverted conical cavity 11, which is designed with a gradually decreasing conical structure to gradually increase the pressure during the flow of the molten material.

[0026] After the material passes through the inverted conical cavity 11, it enters the straight section outlet 21, which is a relatively stable and straight channel. At this time, the molten tube blank is extruded from the straight section outlet 21, and at the same time, the moderately heated cable enters the equipment from the cable inlet 22. By precisely controlling the position of the cable inlet 22, it is ensured that the cable sheath is heated to a molten state, so that it can firmly bond with the tube blank extruded from the straight section outlet 21, without damaging the internal conductor and insulation layer.

[0027] Furthermore, adjusting the installation position and angle of the cable inlet 22 allows for fine-tuning of the contact distance between the cable and the tube blank, thereby further optimizing the bonding strength. This design ensures a firm bond between the tube blank and the cable while maintaining the integrity of the cable sheath, meeting the bonding strength requirements of different processes.

[0028] This co-extrusion process enables efficient online bonding of cable conduits, avoiding the chemical pollution associated with traditional adhesive bonding methods and improving the product's environmental friendliness and aesthetics. Due to the use of hot-melt bonding, the entire process not only saves on adhesive material costs but also effectively shortens production time and increases production efficiency. Furthermore, the co-extruded products exhibit excellent bonding uniformity and a smooth, attractive appearance, making them suitable for applications with high requirements for product quality and environmental protection, such as protective sleeves for electronic equipment and automotive cable conduits.

[0029] like Figure 4 As shown, a mounting groove 35 is formed on the outer surface of one end of the connecting pipe 32, and a compression ball 37 is disposed inside the mounting groove 35. The compression port 33 gradually applies pressure to the compression ball 37, thereby causing the compression ball 37 to displace within the mounting groove 35.

[0030] like Figure 4 As shown, a movable rod 38 is fixedly connected to one end of the compression ball 37, and one end of the movable rod 38 passes through the connecting pipe 32. During the compression process, the movable rod 38 further pushes the limiting ball 34 to reposition itself, so that the limiting ball 34 forms a limiting state suitable for the current hose size and type.

[0031] like Figure 4 As shown, one end of the movable rod 38 is fixedly connected to the limiting ball 34, and a compression port 33 is provided on the inner side of the movable tube 31. Multiple movable rods 38 can simultaneously control multiple limiting balls 34 to redisperse and regroup.

[0032] like Figure 4As shown, a spring 36 is installed inside the mounting groove 35, and the spring 36 is sleeved on the outer surface of the movable rod 38. The elastic force of the spring 36 will push the compression ball 37 back to its initial position, while gradually dispersing the multiple limiting balls 34.

[0033] like Figure 4 As shown, the extrusion ball 37 abuts against the extrusion port 33, and the spring 36 is located on one side of the extrusion ball 37. The extrusion ball 37 compresses the spring 36 while being subjected to extrusion force.

[0034] like Figure 4 As shown, a limiting ring 321 is fixedly connected to one end of the connecting pipe 32. The outer diameter of the limiting ring 321 is larger than the inner diameter of the threaded ring 311. This prevents the connecting pipe 32 and the movable pipe 31 from separating.

[0035] The operating method and working principle of this device are as follows: When connecting cables and pipes, during the co-extrusion of hoses and cables, the molten material is pushed out by the screw of the external extruder and enters the inverted conical cavity 11 through the feed port 12. A high pressure gradually forms inside the cavity, and then it flows towards the straight section outlet 21. At this time, the heated cable passes through the cable inlet 22 and adheres precisely to the molten tube blank discharged from the straight section outlet 21.

[0036] During this process, by precisely controlling the position of the cable inlet 22, the cable sheath is ensured to be heated to a suitable melting point for bonding, while avoiding damage to the inner layer of the cable. Furthermore, by adjusting the position of the cable inlet 22, the distance between the cable and the tube blank can be changed, thereby adjusting the bonding strength. This method not only efficiently achieves online bonding of cable conduits but also eliminates the need for adhesives, improving production efficiency while being more environmentally friendly and aesthetically pleasing.

[0037] When limiting and winding the bonded conduit and cable, the conduit is limited by multiple limiting balls 34. These limiting balls 34 are staggered from the bonding area to avoid affecting the bonding quality. For hoses of different types and sizes, the limiting can be achieved by adjusting the position of the movable tube 31. By rotating the threaded ring 311, the movable tube 31 can apply pressure to the extrusion ball 37 through the extrusion port 33 during movement, causing it to move within the mounting groove 35.

[0038] During this process, the pressure applied to the extrusion ball 37 compresses the spring 36, simultaneously altering the distribution of the limiting balls 34 to achieve adaptive limiting adjustment. When the movable tube 31 rotates, the elastic reaction force of the spring 36 pushes the extrusion ball 37, causing the multiple limiting balls 34 to gradually disperse. Through the adjustment function of the limiting balls 34, knotting can be effectively prevented during winding, thereby ensuring the winding quality of the conduit and cable.

[0039] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A co-extrusion die for hoses and cables, comprising a first die (1) and a second die (2), characterized in that: The first die (1) has an inlet (12) on its inner side at one end, and the second die (2) has a straight section outlet (21) in its inner cavity. An inverted conical cavity (11) is formed between the first die (1) and the second die (2). A cable inlet (22) is formed on the outer surface of the second die (2). Both ends of the cable inlet (22) pass through the second die (2). An installation port (23) is formed on one side of the top of the second die (2). The inverted conical cavity (11) is connected to the inlet (12) and the straight section outlet (21) respectively. A limit mechanism (3) is installed on one side of the second die (2). The length of the straight section outlet (21) is 1.5-2 times the outer diameter of the second die (2). The limiting mechanism (3) includes a connecting tube (32) and a movable tube (31). One end of the connecting tube (32) is fixedly connected to the second die (2). One end of the movable tube (31) is fixedly connected to a threaded ring (311). The threaded ring (311) is threadedly connected to the outer surface of the connecting tube (32). The inner cavity of the connecting tube (32) is provided with a plurality of limiting balls (34).

2. The co-extrusion molding die for hoses and cables according to claim 1, characterized in that: The outer surface of one end of the connecting pipe (32) is provided with an installation groove (35), and an extrusion ball (37) is provided inside the installation groove (35).

3. The co-extrusion molding die for hoses and cables according to claim 2, characterized in that: One end of the extrusion ball (37) is fixedly connected to a movable rod (38), and one end of the movable rod (38) passes through the connecting pipe (32).

4. The co-extrusion molding die for hoses and cables according to claim 3, characterized in that: One end of the movable rod (38) is fixedly connected to the limiting ball (34), and the inner side of the movable tube (31) is provided with a squeezing port (33).

5. The co-extrusion die for hoses and cables according to claim 2, characterized in that: A spring (36) is provided in the inner cavity of the mounting groove (35), and the spring (36) is sleeved on the outer surface of the movable rod (38).

6. The co-extrusion die for hoses and cables according to claim 5, characterized in that: The extrusion ball (37) abuts against the extrusion port (33), and the spring (36) is located on one side of the extrusion ball (37).

7. The co-extrusion molding die for hoses and cables according to claim 1, characterized in that: One end of the connecting pipe (32) is fixedly connected to a limiting ring (321), the outer diameter of which is larger than the inner diameter of the threaded ring (311).

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