Screw extruder

Abstract

The utility model is suitable for the technical field of conveying devices, and provides a screw-type extruder, which comprises a charging barrel, a screw-type extruder, a screw-type extruder, a screw-type extruder and a screw-type extruder, a spiral groove is formed in the outer surface of the screw rod, and the screw rod is inserted into the charging barrel; the discharging assembly is arranged at the feeding end of the charging barrel and used for supplying materials to the charging barrel; each heating assembly comprises a heating ring, a horn mouth and a heat dissipation fan, the periphery of the charging barrel is sleeved with the heating ring, the heating ring is located between the two partition plates, the horn mouth is formed between the two partition plates, an air outlet right faces the heating ring, and the heat dissipation fan supplies air to the horn mouth; the tail end of the driving assembly is connected with the screw rod, and the driving assembly is used for driving the screw rod to rotate. The heating assemblies are arranged between the partition plates at intervals, uniform heating is achieved through the heating rings, and uniform flowing extrusion of molten materials is facilitated.

Description

Technical Field

[0001] This utility model belongs to the field of conveying device technology, and in particular relates to a screw extruder. Background Technology

[0002] A screw extruder is an industrial device that uses a rotating screw to convey, compress, melt, and mix materials in a heated barrel, ultimately extruding them continuously through a die to form finished products. Its core components include the barrel, screw, and die. The barrel is externally heated, causing the material to heat and plasticize; the screw propels the material through its thread design and rotational motion, achieving shearing, mixing, and homogenization; the die has a customized outlet, giving the melt a specific cross-sectional shape, such as pipes or sheets. During operation, solid particles or powder enter the barrel from the hopper and are conveyed forward by the rotating screw. After passing through the feeding section (solid conveying), compression section (melt compaction), and homogenization section (mixing and homogenization), the molten material is extruded through the die under high pressure and cooled to form a continuous product.

[0003] Screw extruders are generally divided into single-screw extruders and twin-screw extruders. They extrude materials by heating and softening them, and are widely used for extruding rubber semi-finished products and finished products. Current heating structures heat the material inside the barrel through external heating elements. The heat needs to penetrate the barrel wall and be indirectly conducted to the material, which can easily lead to blockages due to uneven heating of the material. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide a screw extruder that aims to solve the problem of uneven heating of the barrel.

[0005] This utility model is implemented as follows: a screw extruder, the screw extruder comprising:

[0006] The material cylinder has several partitions spaced apart on its outer side;

[0007] The screw has a spiral groove on its outer surface and is inserted into the barrel.

[0008] A feeding assembly is located at the feed end of the material cylinder and is used to feed material into the material cylinder;

[0009] A plurality of heating components, each heating component including a heating coil, a flared opening and a cooling fan, wherein the heating coil is fitted around the outer periphery of the material cylinder and located between two partitions, the flared opening is disposed between the two partitions, the air inlet is facing the heating coil, and the cooling fan supplies air to the flared opening;

[0010] The drive assembly, with its end connected to the screw, is used to drive the screw to rotate.

[0011] Furthermore, the heating coil, the flared mouth, and the cooling fan are arranged sequentially from top to bottom at the bottom of the material cylinder.

[0012] Furthermore, the feeding assembly includes:

[0013] The hopper has a discharge port at the bottom and a feed port at the top.

[0014] A discharge hopper is located at the discharge port of the upper hopper. The discharge hopper has a first discharge port and a second discharge port. The first discharge port is vertically downward and leads to the material cylinder. The second discharge port is inclined downward and located on one side of the discharge hopper.

[0015] Furthermore, the feeding assembly also includes a weight sensing unit, which is located at the bottom of the feeding hopper and is used to monitor the weight of the material in the feeding hopper in real time.

[0016] Furthermore, the feeding assembly also includes a housing, which is disposed outside the feeding hopper and the unloading hopper. The housing is provided with a transparent acrylic plate, and the feeding hopper is also made of a transparent acrylic plate to observe the internal feeding process.

[0017] The spiral extruder provided in this embodiment of the utility model has the following advantages: it is equipped with several heating components, which are spaced apart between partitions. Uniform heating is achieved through heating coils, which is conducive to the uniform flow and extrusion of molten material. When the actual temperature exceeds the set temperature, the cooling fan works, and the heat of the barrel is carried out through the bell mouth, avoiding sudden changes in local temperature. Attached Figure Description

[0018] Figure 1 A perspective view of a screw extruder provided for an embodiment of this utility model (without the casing);

[0019] Figure 2 A perspective view of a screw extruder provided for an embodiment of this utility model;

[0020] Figure 3 A cross-sectional view of a screw extruder provided in an embodiment of this utility model;

[0021] Figure 4 A front view of a screw extruder provided in an embodiment of this utility model;

[0022] Figure 5 for Figure 4 AA section view;

[0023] Figure 6 A perspective view of the screw provided in an embodiment of this utility model.

[0024] 100. Material cylinder; 110. Baffle plate;

[0025] 200, screw; 210, spiral groove;

[0026] 300. Feeding assembly; 310. Feeding hopper; 320. Feeding hopper; 321. First discharge port; 322. Second discharge port; 330. Housing;

[0027] 400. Heating component; 410. Heating coil; 420. Flared mouth; 430. Cooling fan;

[0028] 500. Driver components. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining this utility model and are not intended to limit this utility model.

[0030] It is understood that the terms “first,” “second,” etc., used in this application may be used herein to describe various elements, but unless otherwise stated, these elements are not limited by these terms. These terms are used only to distinguish one element from another.

[0031] In one embodiment, such as Figure 1-6 As shown, a screw extruder is proposed, the screw extruder comprising:

[0032] The material cylinder 100 has several partitions 110 spaced apart on its outer side;

[0033] The screw 200 has a spiral groove 210 on its outer surface. The screw 200 is inserted into the barrel 100, such as... Figure 6 As shown;

[0034] The feeding assembly 300 is disposed at the feeding end of the material cylinder 100 and is used to feed material into the material cylinder 100;

[0035] A plurality of heating components 400, each heating component 400 including a heating coil 410, a flared mouth 420 and a cooling fan 430, wherein the heating coil 410 is sleeved on the outer periphery of the material cylinder 100 and located between two partition plates 110, the flared mouth 420 is disposed between the two partition plates 110 and the air inlet is directly facing the heating coil 410, and the cooling fan 430 supplies air to the flared mouth 420;

[0036] The drive assembly 500 is connected at its end to the screw 200 and is used to drive the screw 200 to rotate.

[0037] In this embodiment, as Figure 1 and 3As shown, five partitions 110 are provided, creating four spaces for mounting the heating components 400. In specific implementation scenarios, the number of partitions 110 can be adjusted according to the length of the material cylinder 100; these are not listed here. The heating coil 410 is a ceramic heating coil, which has advantages such as easy installation, high temperature resistance, and fast heat transfer. The heating coil 410 is fitted around the outer periphery of the material cylinder 100. The flared opening 420 is located directly below the heating coil 410, with a wider bottom and a narrower top. The lower opening is the air outlet, and a cooling fan 430 is installed at the air outlet. The air inlet faces upwards towards the heating coil 410. Thus, the heating coil 410, the flared opening 420, and the cooling fan 430 are arranged sequentially from top to bottom at the bottom of the material cylinder 100. In this embodiment, several heating components 400 are provided and spaced apart between the partitions 110. Uniform heating is achieved through the heating coils 410, which is conducive to the uniform flow and extrusion of molten material. When the actual temperature exceeds the set temperature, the cooling fan 430 is activated, and the heat from the barrel 100 is carried out through the flared mouth 420 to avoid sudden changes in local temperature.

[0038] In this embodiment, the drive assembly 500 can be a motor or a combination of a motor and a reducer, used to provide rotational power to the screw 200. The screw 200 is inserted into the barrel 100, and a spiral groove 210 is left between the screw 200 and the barrel 100. When the screw 200 rotates, it can spirally extrude the material.

[0039] In one embodiment, such as Figure 3-5 As shown, a feeding assembly 300 is proposed. The feeding assembly 300 includes:

[0040] The feeding hopper 310 has a discharge port at the bottom and a feed port at the top;

[0041] The feeding hopper 320 is located at the discharge port of the feeding hopper 310. The feeding hopper 320 is provided with a first discharge port 321 and a second discharge port 322. The first discharge port 321 is vertically downward and leads to the material cylinder 100. The second discharge port 322 is inclined downward and located on one side of the feeding hopper 320.

[0042] A weight sensing unit is installed at the bottom of the feeding hopper 310 to monitor the weight of the material in the feeding hopper 310 in real time.

[0043] The housing 330 is disposed outside the feed hopper 310 and the discharge hopper 320. The housing 330 is provided with a transparent acrylic plate. The feed hopper 310 is also made of transparent acrylic plate to observe the internal discharge situation.

[0044] In this embodiment, the feeding hopper 310 is used to fill materials, and a weight sensing unit is provided below the feeding hopper 310. The weight sensing unit is positioned below the feeding hopper 310 via an annular washer, and a pad is provided at the bottom of the weight sensing unit to support it. During material feeding, the weight of the feeding hopper 310 increases, pressing down on the weight sensing unit through the annular washer, thereby achieving weight monitoring.

[0045] In this embodiment, the discharge hopper 320 is provided with two discharge ports, one vertical and one inclined. The vertical first discharge port 321 is used to supply material to the material cylinder 100, and the inclined second discharge port 322 is located on one side of the discharge hopper 320 near the middle to prevent excessive material accumulation and blockage. It is understood that an openable and closable opening is provided between the upper hopper 310 and the lower hopper 320 to control the discharge rate. This control structure is a conventional technical means and will not be elaborated here.

[0046] Working principle: The material passes through the upper hopper 310 and the lower hopper 320 in sequence and enters the material cylinder 100. The material cylinder 100 is arranged horizontally, and one side of the screw 200 extends out of the feed port of the material cylinder 100. Since the screw 200 is provided with a spiral groove 210, under the drive of the drive component 500, the screw 200 rotates and squeezes the material into the material cylinder 100 through the spiral groove 210, so that the material spirals forward in the material cylinder 100 and is finally squeezed out from the end of the screw 200.

[0047] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0048] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

[0049] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A screw extruder, characterized by The spiral extruder includes: The material cylinder has several partitions spaced apart on its outer side; The screw has a spiral groove on its outer surface and is inserted into the barrel. A feeding assembly is located at the feed end of the material cylinder and is used to feed material into the material cylinder; A plurality of heating components, wherein the heating components include a heating coil, a flared mouth and a cooling fan, the heating coil is sleeved around the outer periphery of the material cylinder and located between two partitions, the flared mouth is disposed between the two partitions, the air inlet is facing the heating coil, and the cooling fan supplies air to the flared mouth; The drive assembly, with its end connected to the screw, is used to drive the screw to rotate.

2. The screw extruder according to claim 1, characterized in that The heating coil, the flared mouth, and the cooling fan are arranged sequentially from top to bottom at the bottom of the material cylinder.

3. The screw extruder according to claim 1, characterized in that The feeding assembly includes: The hopper has a discharge port at the bottom and a feed port at the top. A discharge hopper is provided at the discharge port of the upper hopper. The discharge hopper is provided with a first discharge port and a second discharge port. The first discharge port is vertically downward and leads to the material cylinder. The second discharge port is inclined downward and provided on one side of the discharge hopper.

4. The screw extruder according to claim 3, characterized in that The feeding assembly also includes a weight sensing unit, which is located at the bottom of the feeding hopper and is used to monitor the weight of the material in the feeding hopper in real time.

5. The screw extruder according to claim 3, characterized in that The feeding assembly also includes a housing, which is disposed outside the feeding hopper and the unloading hopper. The housing is provided with a transparent acrylic plate, and the feeding hopper is also made of a transparent acrylic plate to observe the internal feeding process.

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