Thermoplastic elastomer extruder

Abstract

The utility model provides a thermoplastic elastomer extruder and belongs to the technical field of machinery. The problems that in the prior art, a feeding hopper is prone to being blocked, mixing and plasticizing are insufficient, and feeding and production efficiency is affected are solved. The thermoplastic elastomer extruder comprises a rack, an extrusion barrel is arranged on the rack, a first motor is arranged at the left end of the extrusion barrel, an extrusion mold is arranged at the right end of the extrusion barrel, and a feeding hopper is arranged on the upper portion of the left end of the extrusion barrel. The extrusion barrel comprises a preheating section, a mixing section and an extrusion section from left to right. The device has the advantages that raw materials are not easy to accumulate and block the feeding hopper, the feeding efficiency is high, three-section independent temperature control of the extrusion barrel is realized, the device is suitable for preheating, mixed plasticizing and stable-state conveying processes of materials, and the production efficiency and the production quality are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to mechanical technical field relates to a thermoplastic elastomer extruder. BACKGROUND

[0002] Thermoplastic elastomer, abbreviated as TPE or TPR, is a kind of elastomer with the elasticity of rubber at room temperature and plastic forming at high temperature, which can be produced by injection molding, extrusion, blow molding and other processing methods.

[0003] Extruder is one of the types of plastic machinery, raw materials are added into the extrusion cylinder through the feeding hopper, and the raw materials are fully plasticized and uniformly mixed through the heating of the heating device, the pressure, shear force and stirring force generated by the rotation of the screw, and then extruded into the shape through the extrusion die.

[0004] The existing thermoplastic elastomer extruder is prone to blockage when feeding due to the fixed diameter of the feeding hopper and the extrusion cylinder, which affects the feeding efficiency. At the same time, the heating temperature in the extruder is single, the screw structure is single, and there is no local preheating and concentrated mixing effect, so the raw materials need a long time for heating and mixing, which affects the production efficiency and production quality of the extruder. UTILITY MODEL CONTENTS

[0005] The utility model aims at the above problems existing in the prior art, and provides a thermoplastic elastomer extruder which is not easy to block during feeding and has high production efficiency.

[0006] The purpose of the utility model can be achieved by the following technical scheme:

[0007] A thermoplastic elastomer extruder, comprising a rack, the rack is provided with an extrusion cylinder, the left end of the extrusion cylinder is provided with a motor one and the right end of the extrusion cylinder is provided with an extrusion die, the upper part of the left end of the extrusion cylinder is provided with a feeding hopper, characterized in that the side wall of the extrusion cylinder is provided with a heating layer, the extrusion cylinder comprises a preheating section, a mixing section and an extrusion section from left to right, the heating layer on the preheating section, the mixing section and the extrusion section can independently adjust the temperature, the preheating section, the mixing section and the extrusion section are all provided with stirring screws, the three stirring screws are connected in sequence and are drivingly connected with the motor one, the feeding hopper is connected to the upper part of the preheating section and is provided with a stirrer in the feeding hopper, the diameter of the stirring screw shaft in the mixing section gradually increases from left to right, and the extrusion die is connected to the right end of the extrusion section.

[0008] The thermoplastic elastomer extruder works, the raw materials are added into the extrusion cylinder through the feeding hopper, the material is heated through the heating layer on the extrusion cylinder, the material is stirred, sheared, mixed and pushed through the rotation of the motor-driven stirring screw, the feeding hopper is provided with a stirrer which can stir the raw materials in the feeding hopper during the feeding process, so as to avoid the raw materials from being accumulated in the feeding hopper to cause blockage and improve the feeding efficiency. The extrusion cylinder is divided into three sections, namely preheating section, mixing section and extrusion section, and the stirring screw also has three corresponding sections. The heating layer of each section can independently control the temperature. The material is preliminarily preheated under the condition of low temperature in the preheating section, mixed and plasticized under the condition of high temperature in the mixing section, and the diameter of the stirring screw gradually increases to slow down the conveying speed of the material at this place, so that the material is fully mixed and plasticized before being conveyed to the extrusion section. The material which is not fully mixed is blocked in the mixing section for continuous stirring and shearing until it is fully mixed, so as to improve the production efficiency and production quality. The fully mixed material is kept in a stable state under the condition of medium-high temperature in the extrusion section and is conveyed to the extrusion die under the pushing action of the stirring screw, and finally extruded and formed from the die hole of the extrusion die.

[0009] In the above thermoplastic elastomer extruder, the side wall of the extrusion cylinder has a three-layer structure, and the three-layer structure is sequentially composed of a heat preservation layer, a heating layer and a base layer from outside to inside.

[0010] In the above thermoplastic elastomer extruder, the heat preservation layer is a heat insulation material.

[0011] In the above thermoplastic elastomer extruder, the heating layer is uniformly distributed with electric heating wires.

[0012] The heating layer generates heat by electric heating and transfers the heat to the extrusion cylinder. The heat preservation layer arranged outside the heating layer has a heat insulation function, which ensures the temperature stability of each section of the extrusion cylinder, reduces the heat dissipation to the outside, reduces the heat loss, and improves the energy utilization rate.

[0013] In the above thermoplastic elastomer extruder, the stirrer comprises a stirring shaft and a motor two, the stirring shaft is transversely arranged in the lower part of the feeding hopper and is rotatably connected with the side wall of the feeding hopper, and the motor two is fixedly connected outside the feeding hopper and is drivingly connected with the stirring shaft.

[0014] The motor two drives the stirring shaft to rotate to stir the raw materials, so that the raw materials maintain a flowing state in the feeding hopper, improve the efficiency of adding the raw materials into the extrusion cylinder, and prevent the raw materials from being accumulated and blocked in the feeding hopper.

[0015] In the above thermoplastic elastomer extruder, a connecting seat is further arranged on the rack, the above extrusion cylinder is fixedly connected on the connecting seat, the number of the connecting seat is several, and the several connecting seats are arranged equidistantly along the axial direction of the extrusion cylinder.

[0016] The connecting seats are used to improve the stable connection between the extrusion barrel and the frame, so as to ensure the stability of the operation of the extrusion barrel.

[0017] In the thermoplastic elastomer extruder, the extrusion die is detachably connected with the extrusion section.

[0018] The detachable connection of the extrusion die facilitates the replacement of different extrusion dies according to different production requirements, is high in flexibility, and is widely applicable.

[0019] In the thermoplastic elastomer extruder, the upper part of the feeding hopper has a larger diameter than the lower part.

[0020] The structure of the feeding hopper with a larger upper part and a smaller lower part is more conducive to feeding operation.

[0021] Compared with the prior art, the thermoplastic elastomer extruder is provided with a stirrer in the feeding hopper to stir the raw materials in the feeding hopper, avoids the accumulation of the raw materials in the feeding hopper to cause blockage, improves the feeding efficiency, and divides the extrusion barrel into a preheating section, a mixing section and an extrusion section. The heating layers of each section can be independently temperature-controlled, so that the material is sequentially preheated, mixed, plasticized and stably conveyed in the extrusion barrel, and then extruded and formed through the extrusion die. The mixing section is provided with a stirring screw with an increasing diameter to ensure that the material is fully mixed and plasticized before being conveyed to the extrusion section, thereby improving the production efficiency and production quality. The heat preservation layer arranged outside the heating layer ensures the temperature stability of each section of the extrusion barrel, reduces the heat dissipation to the outside, reduces heat loss, and improves the energy utilization rate. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a schematic view of the internal structure of the thermoplastic elastomer extruder;

[0023] Figure 2 is a schematic view of the external structure of the thermoplastic elastomer extruder;

[0024] Figure 3 is a schematic view of the structure of the side wall of the extrusion barrel of the thermoplastic elastomer extruder.

[0025] In the drawings, 1 is a frame, 2 is a motor, 3 is a motor, 4 is a feeding hopper, 5 is a preheating section, 6 is a mixing section, 7 is an extrusion section, 8 is an extrusion die, 9 is a connecting seat, 10 is a stirring shaft, 11 is a stirring screw, 12 is a heat preservation layer, 13 is a heating layer, and 14 is a base layer. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.

[0027] It should be noted that when a component is referred to as being "mounted on" another component, it can be directly mounted on the other component or there can be a middle component. When a component is referred to as being "provided on" another component, it can be directly provided on the other component or there can be a middle component. When a component is referred to as being "fixed on" another component, it can be directly fixed on the other component or there can be a middle component.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the description of the present application herein only for the purpose of describing the specific embodiments of the present application, and is not intended to limit the present application. The term "or / and" used herein includes any and all combinations of one or more related listed items.

[0029] As shown in Figure 1 The thermoplastic elastomer extruder shown in Fig. 3 comprises a frame 1, an extrusion cylinder arranged on the frame 1, a motor 2 arranged at the left end of the extrusion cylinder, an extrusion die 8 arranged at the right end of the extrusion cylinder, a feeding hopper 4 arranged at the upper part of the left end of the extrusion cylinder, a heating layer 13 arranged on the side wall of the extrusion cylinder, the extrusion cylinder comprising a preheating section 5, a mixing section 6 and an extrusion section 7 from left to right, the heating layer 13 on the preheating section 5, the mixing section 6 and the extrusion section 7 being capable of independently adjusting the temperature, a stirring screw 11 arranged in each of the preheating section 5, the mixing section 6 and the extrusion section 7, the three stirring screws 11 being sequentially connected and drivingly connected with the motor 2, the feeding hopper 4 being connected at the upper part of the preheating section 5 and a stirrer being arranged in the feeding hopper 4, the diameter of the stirring screw 11 in the mixing section 6 gradually increasing from left to right, and the extrusion die 8 being connected at the right end of the extrusion section 7.

[0030] The side wall of the extrusion cylinder has a three-layer structure, and the three-layer structure comprises, from outside to inside, a heat preservation layer 12, a heating layer 13 and a base layer 14.

[0031] The heat preservation layer 12 is a heat insulation and heat preservation material.

[0032] The heating layer 13 is uniformly provided with electric heating wires.

[0033] The stirrer comprises a stirring shaft 10 and a motor 3, the stirring shaft 10 is transversely arranged at the lower part of the feeding hopper 4 and is rotationally connected with the side wall of the feeding hopper 4, and the motor 3 is fixedly connected outside the feeding hopper 4 and is drivingly connected with the stirring shaft 10.

[0034] The connecting seats 9 are arranged on the frame 1, the extrusion barrel is fixedly connected with the connecting seats 9, and the number of the connecting seats 9 is several, and the several connecting seats 9 are arranged at equal intervals along the axial direction of the extrusion barrel.

[0035] The extrusion die 8 is detachably connected with the extrusion section 7.

[0036] The upper part of the feeding hopper 4 has a larger diameter than the lower part of the feeding hopper 4.

[0037] In the working process of the thermoplastic elastomer extruder, the raw materials are added into the extrusion barrel through the feeding hopper 4, the material is heated through the heating layer 13 on the extrusion barrel, the material is stirred, sheared, mixed and pushed through the rotation of the stirring screw 11 driven by the motor 2, the feeding hopper 4 is provided with a stirrer to stir the raw materials in the feeding hopper 4 during the feeding process, so as to avoid the raw materials from being accumulated in the feeding hopper 4 to cause blockage and improve the feeding efficiency, the extrusion barrel is divided into a preheating section 5, a mixing section 6 and an extrusion section 7, the stirring screw 11 also has three corresponding sections, the heating layer 13 of each section can independently control the temperature, the material is preliminarily preheated under the condition of low temperature in the preheating section 5, is mixed and plasticized under the condition of high temperature in the mixing section 6, and the stirring screw 11 with gradually increasing diameter can slow down the conveying speed of the material at this position, so as to ensure that the material is fully mixed and plasticized and then conveyed to the extrusion section 7, the material which is not fully mixed is blocked in the mixing section 6 to continue stirring and shearing until fully mixed, so as to improve the production efficiency and production quality, the fully mixed material is kept in a stable state under the condition of medium-high temperature in the extrusion section 7 and is conveyed to the extrusion die 8 under the pushing action of the stirring screw 11, and finally is extruded and formed from the die hole of the extrusion die 8.

[0038] The technical features of the above-mentioned embodiments can be combined arbitrarily, and in order to make the description simple, all possible combinations of the technical features in the above-mentioned embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, it should be considered that they are within the scope of the present application.

[0039] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present application, and are not used as a limitation of the present application, and as long as the above embodiments are appropriately changed and changed within the scope of the essential spirit of the present application, they fall within the scope of the present application.

Claims

1. A thermoplastic elastomer extruder, comprising a frame, an extrusion barrel provided on the frame, a motor provided at the left end of the extrusion barrel, an extrusion die provided at the right end of the extrusion barrel, and a feeding hopper provided at the upper portion of the left end of the extrusion barrel, characterized in that: A heating layer is provided on the side wall of the extrusion barrel. The extrusion barrel includes a preheating section, a mixing section and an extrusion section from left to right. The heating layers on the preheating section, the mixing section and the extrusion section can independently adjust the temperature. A stirring screw is provided in the preheating section, the mixing section and the extrusion section. The three stirring screws are connected in sequence and connected to a motor for transmission. The feeding hopper is connected to the upper part of the preheating section and an agitator is provided in the feeding hopper. The diameter of the stirring screw body in the mixing section gradually increases from left to right, and the extrusion die is connected to the right end of the extrusion section.

2. The thermoplastic elastomer extruder according to claim 1, characterized in that The side wall of the extrusion cylinder is a three-layer structure, and the three-layer structure is composed of a heat preservation layer, a heating layer and a base layer from the outside to the inside.

3. The thermoplastic elastomer extruder according to claim 2, characterized in that The thermal insulation layer is made of thermal insulation material.

4. The thermoplastic elastomer extruder according to claim 3, characterized in that Electric heating wires are evenly distributed in the heating layer.

5. The thermoplastic elastomer extruder according to claim 4, characterized in that The agitator includes a stirring shaft and a second motor. The stirring shaft is transversely arranged at the lower part of the feeding hopper and is rotatably connected to the side wall of the feeding hopper. The second motor is fixedly connected to the outside of the feeding hopper and is transmission-connected to the stirring shaft.

6. The thermoplastic elastomer extruder according to claim 5, characterized in that It also includes a connecting seat, which is arranged on the frame. The extrusion cylinder is fixedly connected to the connecting seat. There are several connecting seats, which are equidistantly arranged along the axial direction of the extrusion cylinder.

7. The thermoplastic elastomer extruder according to claim 6, characterized in that The extrusion die and the extrusion section are detachably connected.

8. The thermoplastic elastomer extruder according to claim 7, characterized in that The upper diameter of the feeding hopper is larger than the lower diameter of the feeding hopper.

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