Extruder for heating flat, smooth and uniform electric wires

Abstract

This invention provides an extruder for wires with smooth and uniform heating, comprising a body, a die head, a neck, a barrel, a heater, a conduit, and a pump. The body encloses the barrel, which contains a screw. The body includes a heating zone and an extrusion zone. The heater is connected to the heating zone via a conduit. The die head is connected to the extrusion zone via the neck. The heating zone has a feed inlet, and the die head has a discharge outlet. Silicone oil is introduced into the heater, and the heated silicone oil is pumped into the heating zone. Existing silicone oil in the heater is pumped back to the heater, thus achieving constant temperature heating. The temperature fluctuation within the barrel is within 1°C, resulting in more uniform material heating, more stable plasticization, and a more stable material flow. This reduces common problems such as old rubber and bulging, leading to higher precision products with better electrical performance and appearance, offering significant advantages in the production of high-frequency data cables.

Description

Technical Field

[0001] This utility model relates to the field of extruders, and in particular to an extruder for wires that provides smooth and uniform heating. Background Technology

[0002] Existing extruder heating systems primarily rely on electric heating coils and heaters to achieve their heating function. Their heating principle is based on the Joule effect, where heat is generated when an electric current passes through a resistive object, thus heating the plastic. Resistance heating suffers from several problems, including uneven distribution of the resistance wire within the heating element, poor contact between the resistance wire and the power supply or connection points, inconsistent heat dissipation conditions in the heated environment leading to some areas experiencing rapid or difficult heat dissipation, unstable power supply voltage or current, fluctuating heating power, and susceptibility to aging or localized damage to the heating element. These factors all contribute to uneven heating, localized overheating or underheating, ultimately affecting product insulation and sheathing molding.

[0003] When raw materials are heated unevenly during extrusion, resulting in large local temperature differences, the material flow becomes unstable, leading to turbulence in the barrel. This results in inconsistent extrusion volume and screw impurity accumulation, impacting product quality. It also affects the degree of plasticization in different areas, causing significant variations in plasticization. These differences further affect the color uniformity of the product, resulting in inconsistent surface color and affecting its overall aesthetics. Uneven heating leads to variations in the melting and mixing of materials during extrusion, directly causing inhomogeneity in the product's internal structure. This inhomogeneity further causes fluctuations in mechanical properties (such as strength, toughness, and peel force of insulation or sheath layers) and electrical properties (capacitance and return loss of communication cables). Uneven heating during extrusion causes inconsistent material shrinkage, making it difficult to guarantee dimensional accuracy, specifically manifesting as dimensional inconsistencies, such as fluctuations in insulation outer diameter, affecting product stability and reliability. Traditional resistance heating methods involve conductive wires at the die and die head, which can interfere with operator work and pose risks of short circuits and leakage. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an extruder for wires that provides smooth and uniform heating, which can perform constant temperature heating and control the temperature fluctuation within 1°C, resulting in more uniform heating and solving the problem of uneven heating in existing extruder heating systems that leads to large local temperature differences.

[0005] The technical solution adopted in this utility model is:

[0006] An extruder for wires that provides smooth and uniform heating includes a body, a die head, a neck, a barrel, a heater, a conduit, and a pump body.

[0007] The machine body encloses the material barrel, and the material barrel contains a screw. The machine body includes a heating zone and an extrusion zone.

[0008] The heater is connected to the heating zone via the conduit;

[0009] The die head is connected to the extrusion zone via the die neck;

[0010] The heating zone is provided with a feed inlet, and the machine head is provided with a discharge outlet;

[0011] Silicone oil is introduced into the heater, and the heated silicone oil is introduced into the heating zone through the pump body. The original silicone oil in the heater is returned to the heater through the pump body.

[0012] Preferably, the heater is equipped with a liquid level observation device.

[0013] Preferably, a thermocouple is also included, with the temperature measuring part of the thermocouple disposed inside the barrel.

[0014] Preferably, the system also includes a main PLC connected to the heater.

[0015] Preferably, there are multiple heaters and heating zones, and the multiple heaters and multiple heating zones correspond one-to-one, with heat insulation material provided between the multiple heating zones.

[0016] The present invention adopts the above technical solution and has the following beneficial effects:

[0017] It can maintain a constant temperature, with temperature fluctuations within the barrel within 1°C, resulting in more uniform heating, more stable material plasticization, and stable material flow, thereby reducing common problems such as old rubber and bulging. Temperature control during material extrusion is more precise, leading to higher product accuracy, superior electrical performance, and better appearance, offering greater advantages in the production of high-frequency data cables. Using silicone oil heating instead of traditional resistance heating reduces the risk of electric shock to employees, ensuring higher safety. The temperature transition is smoother, preventing localized overheating of raw materials within the barrel and the generation of byproducts that affect product quality. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a perspective view of an extruder for heating wires to produce smooth and uniform heating, according to the present invention.

[0020] Figure 2 This is a side view of an extruder for producing wires with smooth and uniform heating, according to the present invention.

[0021] Figure 3This is a front view of an extruder for producing wires with smooth and uniform heating, according to the present invention. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0023] See Figures 1 to 3 This utility model discloses an extruder for wires that provides smooth and uniform heating, comprising a body 1, a die head 2, a neck 3, a barrel 4, a heater 7, a conduit 8, and a pump body (not shown in the figure). The body 1 encloses the barrel 4, and a screw (not shown in the figure) is installed inside the barrel 4. The body 1 includes a heating zone 9 and an extrusion zone 10. The heater 7 is connected to the heating zone 9 through the conduit 8. The die head 2 is connected to the extrusion zone 10 through the neck 3. The heating zone 9 has a feed inlet 5, and the die head 2 has a discharge outlet 6. Silicone oil is introduced into the heater 7, and the silicone oil heated by the heater 7 is introduced into the heating zone 9 through the pump body. The original silicone oil in the heater 7 is returned to the heater 7 through the pump body. When the screw rotates inside the barrel 4, it generates thrust, continuously pushing the material from the feed inlet 5 to the discharge outlet 6.

[0024] The heater 7 is equipped with a liquid level observation device (not shown in the figure). The operator can use the liquid level observation device to determine whether the silicone oil in the heater 7 is sufficient, and replenish it in time when the silicone oil is insufficient.

[0025] It also includes a thermocouple (not shown in the figure), the temperature measuring part of which is located inside the material cylinder 4. It is used to test the temperature of the material.

[0026] It also includes a main PLC (not shown in the figure), which is connected to the heater 7. It can automatically heat and cool based on the temperature detected by the thermocouple.

[0027] Multiple heaters 7 and heating zones 9 are provided, and each heater 7 and heating zone 9 corresponds to another heating zone 9. Insulation material 11 is provided between the multiple heating zones 9. The temperature of each heating zone 9 can be adjusted independently, and the temperature of different heating zones 9 can be prevented from affecting each other.

[0028] The beneficial effects achieved by the technical solution of this utility model are as follows:

[0029] This invention enables constant-temperature heating, and the temperature fluctuation within the barrel 4 can be controlled within 1°C. It is less affected by environmental interference, and the material is heated more evenly, thus ensuring more stable plasticization and material flow. This reduces common problems such as old plastic and bulging, resulting in products with higher precision, better electrical performance and appearance. It has a greater advantage when producing high-frequency data cables. The temperature transition within the barrel 4 is smoother, which can prevent local overheating of raw materials within the barrel 4 and the generation of by-products that affect product quality. At the same time, it can reduce the risk of electric shock to employees, resulting in higher safety performance.

[0030] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. An extruder for heating wires to achieve smooth and uniform heating, characterized in that: This includes the machine body, machine head, machine neck, material cylinder, heater, conduit, and pump body; The machine body encloses the material barrel, and the material barrel contains a screw. The machine body includes a heating zone and an extrusion zone. The heater is connected to the heating zone via the conduit; The die head is connected to the extrusion zone via the die neck; The heating zone is provided with a feed inlet, and the machine head is provided with a discharge outlet; Silicone oil is introduced into the heater, and the heated silicone oil is introduced into the heating zone through the pump body. The original silicone oil in the heater is returned to the heater through the pump body.

2. The extruder for producing smoothly and uniformly heated wires according to claim 1, characterized in that: The heater is equipped with a liquid level observation device.

3. The extruder for producing a smooth and uniformly heated wire according to claim 1, characterized in that: It also includes thermocouples, the temperature measuring part of which is disposed inside the barrel.

4. The extruder for producing smoothly and uniformly heated wires according to claim 3, characterized in that: It also includes a main PLC, which is connected to the heater.

5. The extruder for producing smoothly and uniformly heated wires according to claim 1, characterized in that: The heater and the heating zone are provided in multiple ways, and the multiple heaters and the multiple heating zones correspond one-to-one, with heat insulation material provided between the multiple heating zones.

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