Casting extruder for TPU (Thermoplastic Polyurethane) car cover processing

Abstract

The utility model provides a tape-casting extruder for processing TPU (thermoplastic polyurethane) car clothing. The tape-casting extruder comprises a feeding hopper, a feeding hopper and a discharging hopper, the machine barrel is provided with a discharging mold, and the feeding hopper is communicated with the machine barrel; the temperature control device is provided with a cooling part and a constant temperature part, temperature control liquid is contained in the temperature control device, and the temperature control device abuts against the discharging mold and the feeding hopper; wherein the temperature control device has a cooling state and a constant temperature state, the temperature control liquid flows through the cooling part in the cooling state, and the temperature control liquid flows through the constant temperature part in the constant temperature state. According to the scheme, the cooling efficiency is improved by utilizing the temperature control device, the heat of TPU casting is effectively utilized, and the utilization efficiency of energy is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cast film machines, in particular to a cast film extruder for TPU car cover processing. Background Art

[0002] With the continuous improvement of economic level, cast film machines have been widely used. Cast film machines are an important film processing equipment. The principle is that plastic particles enter from the feeding hopper, melt through the extruder, and then flow out through the die. The molten film is poured on the cooling roller to cool and form a film. Cast film machines have the advantages of simple equipment and process, uniform performance, and high production efficiency. In the process of TPU car cover processing, cast film extruders are commonly used equipment. Traditional cast film extruders have low energy utilization efficiency when performing cooling treatment during cast extrusion. Therefore, it is very necessary to provide a cast film extruder with high energy utilization efficiency for TPU car cover processing.

[0003] However, one of the shortcomings of the related art is that the cooling efficiency is low when air cooling technology is used, and the heat emitted by the casting is not utilized. Utility Model Content

[0004] The utility model aims to solve at least one of the above technical problems.

[0005] In order to solve the above problems, the first purpose of the present invention is to provide a casting extruder for TPU car cover processing.

[0006] In order to achieve the first purpose of the utility model, an embodiment of the utility model provides a cast extruder for TPU car cover processing, which includes: a feeding hopper; a barrel, the barrel is provided with a discharge mold, and the feeding hopper and the barrel are connected to each other; a temperature control device, the temperature control device is provided with a cooling part and a constant temperature part, and there is temperature control liquid in the temperature control device, the temperature control device is in abutment with the discharge mold, and the temperature control device is in abutment with the feeding hopper; wherein, the temperature control device has a cooling state and a constant temperature state, the temperature control liquid flows through the cooling part in the cooling state, and the temperature control liquid flows through the constant temperature part in the constant temperature state.

[0007] In a cooling state, a low-temperature temperature-control liquid flows through the cooling section, cooling the discharge die. This allows the molten TPU cast film to quickly cool as it is extruded from the discharge die, forming a TPU car cover. The temperature-control liquid then rises in temperature after passing through the cooling section. After exiting the cooling section, the temperature-control device enters a constant temperature state. The heated temperature-control liquid then flows to the constant temperature section, which insulates the hopper to prevent the molten TPU cast film from solidifying due to excessively low temperatures in the hopper. The temperature-control device controls the temperatures of the cast extruder's discharge die and hopper, and uses the heat absorbed during cooling of the discharge die to insulate the hopper, effectively utilizing energy. The device also features a simple structure, convenient operation, and ease of maintenance, reducing production costs.

[0008] In the above technical solution, the cooling part abuts against the discharge mold.

[0009] By positioning the cooling section against the discharge die, the molten plastic can be rapidly cooled, helping to control the product's shape and dimensional accuracy. This layout significantly improves cooling efficiency. Because the cooling section is in close contact with the discharge die, the molten plastic is quickly cooled upon exiting the mold, minimizing the risk of dimensional change and deformation caused by thermal expansion and contraction. This is crucial for ensuring the dimensional accuracy of sensitive products such as TPU car covers. Rapid and uniform cooling helps reduce internal stress, preventing uneven stress distribution within the material caused by uneven cooling rates, which can affect the material's mechanical properties. It also effectively prevents surface roughness and uneven gloss, ensuring a superior appearance for products like TPU car covers.

[0010] In any of the above technical solutions, the constant temperature portion abuts against the feeding hopper, and the constant temperature portion is communicated with the cooling portion.

[0011] By placing the thermostat against the hopper, a constant temperature can be maintained at the hopper, ensuring that the raw materials fed into the extruder remain at an appropriate temperature. This helps maintain the fluidity and processing properties of the plastic and avoids unstable product quality caused by material temperature fluctuations. Stable raw material temperature reduces the internal stress generated by temperature instability in the molten plastic during the extrusion process, thereby reducing deformation and dimensional deviation in the finished product. This control is particularly important for temperature-sensitive materials such as TPU. Because the thermostat is connected to the cooling unit, the heat generated during the cooling process can be effectively utilized and circulated to the hopper via a thermostatic fluid, achieving heat recovery and reducing energy consumption. This design helps maintain the stability of equipment operation, avoids frequent equipment adjustments caused by large temperature fluctuations, and reduces equipment wear and maintenance costs.

[0012] In any of the above technical solutions, the temperature control device further includes: a liquid storage barrel, which is connected to the constant temperature part.

[0013] As a large liquid storage container, the liquid storage tank can hold large quantities of temperature-control fluid. This helps maintain temperature stability throughout the temperature-control system, as the large volume of liquid is less susceptible to external temperature fluctuations. The liquid storage tank is typically equipped with monitoring devices such as thermometers and level indicators, allowing operators to easily monitor and adjust the temperature-control fluid status to ensure proper system operation. The large capacity of the liquid storage tank reduces the frequency of temperature-control fluid changes, reducing maintenance costs and material consumption. During long periods of continuous production, the liquid storage tank ensures an ample supply of temperature-control fluid to the constant temperature section, preventing any shortages. The temperature-control fluid flowing from the constant temperature section enters the liquid storage tank, where it cools naturally. The large capacity of the liquid storage tank ensures that the temperature-control fluid reaches a sufficient temperature before flowing to the cooling section for further cooling.

[0014] In any of the above technical solutions, the barrel includes: a discharge port, which is connected to the discharge mold; a discharge channel, which is connected to the discharge port, and a feeding hopper is connected to the discharge channel.

[0015] By optimizing the material flow path from the hopper to the discharge port, the material's residence time within the barrel can be reduced, thereby improving production continuity and efficiency. Direct connection between the discharge channel and the hopper helps reduce material loss during transportation, ensuring that more raw materials are used in the final product. This optimized material flow path reduces the additional energy consumption caused by material blockage or poor flow, thereby reducing energy consumption throughout the production process. Smooth material flow within the barrel reduces pressure fluctuations during equipment operation, thereby improving operational stability. Material temperature can be better controlled as it flows through the discharge channel, thereby optimizing the plastic's processing temperature and heat distribution.

[0016] In any of the above technical solutions, the barrel is provided with a pushing device, which is arranged in the discharge channel.

[0017] The pusher ensures continuous and stable movement of raw materials through the discharge channel, reducing downtime caused by material blockage or poor flow, thereby improving the efficiency of the entire production line. The pusher's uniform propulsion ensures that the raw materials pass through the discharge channel and into the mold at a consistent speed and pressure, which helps improve the dimensional accuracy and consistency of the product. Because the pusher improves the efficiency of material flow and reduces the additional energy input required due to material blockage, overall energy consumption is reduced. Operators do not need to frequently intervene in the material conveying process; the pusher automatically completes the material push, simplifying the operating process. The pusher reduces safety risks caused by operator contact with mechanical components, thereby improving the safety of the production process.

[0018] In any of the above technical solutions, the barrel is provided with a driving device, which is connected to the pushing device.

[0019] The drive unit provides precise power output to the pusher, allowing precise control of material push speed and pressure according to production requirements, thereby optimizing the production process. Automated control of the drive unit ensures continuous and consistent material flow, reduces manual intervention, and improves production line efficiency. The drive unit ensures that the pusher operates at a constant speed, ensuring that the molten plastic enters the mold evenly, producing products with consistent size and quality. Precisely controlled pushers reduce wear on the barrel and mold caused by improper manual operation or unstable material flow. The drive unit can be adjusted to suit the characteristics of different raw materials and product requirements, enhancing the adaptability and flexibility of the equipment.

[0020] In any of the above technical solutions, the barrel is provided with a heating device, which is arranged inside the barrel.

[0021] Internal heating devices heat the material more directly, allowing the plastic to melt more quickly and evenly, thereby improving processing efficiency. Uniform heating helps maintain the consistency of the molten plastic, ensuring more stable final product quality and reducing defects caused by uneven temperatures. Internal heating devices reduce heat loss during transfer because the heat acts directly on the material, improving energy efficiency. Because the material is evenly heated within the barrel, wear on the barrel and screw caused by poor material flow or overheating is reduced. Operators can easily adjust the temperature of the internal heating device through the control system, simplifying the operation process and reducing human error. Internal heating devices can quickly respond to temperature changes, achieving more precise temperature control to meet the needs of precision processing. Internal heating devices are usually tightly integrated with the barrel, reducing the risk of operator contact with hot components.

[0022] In any of the above technical solutions, the feeding hopper is provided with a filter.

[0023] Filters prevent large impurities or unmelted material from entering the barrel, thereby avoiding defects and unevenness in the final product. They reduce the amount of impurities and foreign matter that can enter the barrel during the feeding process, reducing the risk of equipment damage, particularly by protecting the screw and mold. Regularly replacing or cleaning filters can reduce equipment downtime and repair time caused by impurity blockage. Filters ensure that only qualified raw materials enter the process, reducing production interruptions caused by impurities and thus improving overall production efficiency. The use of filters reduces instability in material flow and improves equipment operational stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 Schematic diagram of a casting extruder for TPU car cover processing according to some embodiments of the present invention;

[0026] Figure 2 This is a cross-sectional view of a casting extruder for TPU car cover processing according to some embodiments of the present invention.

[0027] Description of reference numerals:

[0028] 100-feeding hopper, 110-filter screen, 200-barrel, 210-discharge mold, 220-discharge port, 230-discharge channel, 241-pushing device, 242-driving device, 250-heating device, 300-temperature control device, 310-cooling part, 320-constant temperature part, 330-liquid storage tank, 340-brake pump. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited by the specific embodiments disclosed below.

[0030] like Figure 1 As shown, an embodiment of the present invention provides a cast film extruder for TPU car cover processing, which is characterized in that it includes: a feeding hopper 100; a barrel 200, the barrel 200 is provided with a discharge mold 210, and the feeding hopper 100 and the barrel 200 are connected to each other; a temperature control device 300, the temperature control device 300 is provided with a cooling part 310 and a constant temperature part 320, and there is temperature control liquid in the temperature control device 300, the temperature control device 300 is against the discharge mold 210, and the temperature control device 300 is against the feeding hopper 100; wherein, the temperature control device 300 has a cooling state and a constant temperature state, in the cooling state, the temperature control liquid flows through the cooling part 310, and in the constant temperature state, the temperature control liquid flows through the constant temperature part 320; the cooling part 310 is against the discharge mold 210; the constant temperature part 320 is against the feeding hopper 100, and the constant temperature part 320 is communicated with the cooling part 310.

[0031] In this embodiment, the hopper 100 has a barrel-shaped structure at the top and a funnel-like structure at the bottom, with the lower portion embedded in the barrel 200. The hopper 100 has an opening at the top. When the cast extruder is operating, the molten TPU is poured from the upper opening into the hopper 100 and then into the barrel 200. The cooling section 310 is in the form of a coil, coiled around the outside of the discharge die 210. The constant temperature section 320 is in the form of a coil, coiled around the outside of the hopper 100. The cooling section 310 and the constant temperature section 320 are connected by a pipe. The temperature control device 300 is in both a cooling state and a constant temperature state. The cooling section 310 is partially in the cooling state, while the constant temperature section 320 is partially in the constant temperature state. In this embodiment, water is used as the temperature-control liquid. Room-temperature water flows into the cooling section 310, which winds around the outside of the discharge die 210, cooling the extruded TPU film through heat exchange. After the heat exchange, the temperature of the temperature-control liquid rises to approximately 100 degrees Celsius. The temperature-control liquid exits the cooling section 310 and flows through a pipe to the constant-temperature section 320. The high-temperature temperature-control liquid in the constant-temperature section 320 maintains the temperature of the heating hopper 100, preventing the molten TPU film in the feeding hopper 100 from freezing due to excessively low temperatures. This improves the cooling efficiency of the discharge die 210 and effectively utilizes the heat dissipated thereto to maintain the temperature of the feeding hopper 100.

[0032] like Figure 1 、 Figure 2 As shown, the temperature control device 300 further includes a liquid storage tank 330, which is connected to the constant temperature unit 320; a brake pump 340, which is connected to the liquid storage tank 330 and the cooling unit 310. The barrel 200 includes a discharge port 220, which is connected to the discharge mold 210; a discharge channel 230, which is connected to the discharge port 220; and a hopper 100, which is connected to the discharge channel 230. The barrel 200 is provided with a pushing device 241, which is located in the discharge channel 230; a driving device 242, which is connected to the pushing device 241; a heating device 250, which is located inside the barrel 200; and a filter screen 110 in the hopper 100.

[0033] In this embodiment, a filter screen 110 is installed inside the hopper 100. This filter screen 110 can filter out large impurities in the molten TPU cast film to improve product quality. A drive device 242 is located outside the barrel 200 and passes through the outer wall of the barrel 200 to connect with the pushing device 241. The pushing device 241 has a spiral disc structure. The drive device 242 drives the pushing device 241 to rotate, thereby pushing the TPU cast film in the discharge channel 230. A heating device 250 is installed inside the barrel 200. During the operation of the cast film extruder, the heating device 250 heats the TPU cast film inside the barrel 200 to keep it in a fluid state and facilitate its ejection from the barrel. The temperature control device 300 is equipped with a liquid reservoir 330, which is connected to the constant temperature section 320. The temperature-control liquid flowing out of the constant temperature section 320 enters the liquid reservoir 330 through a pipe above the liquid reservoir 330 and begins to cool naturally. The liquid reservoir 330 has a sufficient capacity to ensure a sufficient supply of temperature-control liquid. The temperature-control liquid below the liquid reservoir 330 has been sufficiently cooled and enters the brake pump 340 through a pipe below the liquid reservoir 330. The brake pump 340 can promote the flow of temperature-control liquid throughout the temperature control device 300. The sufficiently cooled temperature-control liquid enters the cooling section 310 for cooling, and this circulation improves cooling efficiency and energy utilization.

[0034] In this utility model, the term "plurality" refers to two or more, unless otherwise specified. Terms such as "installed," "connected," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean fixed, removable, or integral; "connected" can mean directly or indirectly through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0035] In the description of the present invention, it is necessary to understand that the terms "upper" and "lower" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as a limitation on the present invention.

[0036] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0037] Although the present invention is disclosed as above, it is not limited thereto. Any person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope defined by the claims.

Claims

1. A casting extruder for TPU car cover processing, characterized in that: include: Hopper (100); A barrel (200), wherein the barrel (200) is provided with a discharge die (210), and the feeding hopper (100) and the barrel (200) are in communication with each other; A temperature control device (300), the temperature control device (300) being provided with a cooling portion (310) and a constant temperature portion (320), a temperature control liquid being contained in the temperature control device (300), the temperature control device (300) being in contact with the discharge die (210), and the temperature control device (300) being in contact with the feeding hopper (100); The temperature control device (300) has a cooling state and a constant temperature state. In the cooling state, the temperature control liquid flows through the cooling portion (310), and in the constant temperature state, the temperature control liquid flows through the constant temperature portion (320).

2. The casting extruder for TPU car cover processing according to claim 1, characterized in that: The cooling portion (310) abuts against the discharge die (210).

3. The casting extruder for TPU car cover processing according to claim 1, characterized in that: The constant temperature portion (320) abuts against the feeding hopper (100), and the constant temperature portion (320) is connected to the cooling portion (310).

4. The casting extruder for TPU car cover processing according to claim 1, characterized in that: The temperature control device (300) further includes: A liquid storage barrel (330), the liquid storage barrel (330) is connected to the constant temperature part (320).

5. The casting extruder for TPU car cover processing according to claim 4, characterized in that: The temperature control device (300) is provided with a brake pump (340), the brake pump (340) is connected to the liquid storage barrel (330), and the brake pump (340) is connected to the cooling part (310).

6. The casting extruder for TPU car cover processing according to claim 1, characterized in that: The barrel (200) comprises: a discharge port (220), the discharge port (220) being in communication with the discharge mold (210); A discharge channel (230), the discharge channel (230) is connected to the discharge port (220), and the feeding hopper (100) is connected to the discharge channel (230).

7. The casting extruder for TPU car cover processing according to claim 6, characterized in that: The barrel (200) is provided with a pushing device (241), and the pushing device (241) is arranged in the discharge channel (230).

8. The casting extruder for TPU car cover processing according to claim 7, characterized in that: The barrel (200) is provided with a driving device (242), and the driving device (242) is connected to the pushing device (241).

9. The casting extruder for TPU car cover processing according to claim 6, characterized in that: The barrel (200) is provided with a heating device (250), and the heating device (250) is arranged inside the barrel (200).

10. The casting extruder for TPU car cover processing according to claim 1, characterized in that: The feeding hopper (100) is provided with a filter screen (110).

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