Extrusion equipment for special engineering film production

Abstract

The utility model discloses extrusion equipment for special engineering film production, which comprises an extruder barrel, an extrusion screw rod and a driving motor, the extrusion screw rod comprises a rod body and a thread, the rod body extends along the front-back direction, and the rod body sequentially comprises a feeding section, a separation section, a metering section and a mixing section from front to back; the outer diameter of the threads evenly and spirally extends to the feeding section, the separating section and the metering section, the length of the separating section is 2-3 times that of the feeding section, the length of the feeding section is larger than that of the metering section and that of the mixing section, and the bottom diameter of the metering section is larger than that of the feeding section. A thread of the separation section is provided with a separation groove which divides the thread into a first screw flight and a second screw flight, the volume of the separation groove is gradually increased from front to back, and the length-diameter ratio of the extrusion screw is 33: 1; the material of an extrusion screw rod is SKD11, and the material of an extrusion machine barrel is 42CrMo; aiming at the production of the special engineering film, the extruder barrel and the extrusion screw are designed, so that the quality of a product is improved, and the abrasion of the extrusion screw and the extruder barrel is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of film production equipment, and in particular to an extrusion equipment for producing special engineering films. Background Art

[0002] Special engineering film is a kind of PPS plastic film. This kind of raw material is easily worn out by the barrel and screw when processed in the previous extrusion equipment, which requires frequent replacement of the barrel and screw of the extrusion equipment, increasing the production cost. In addition, the previous extrusion screw does not fully plasticize the PPS raw material, affecting the quality of the final product. Summary of the invention

[0003] In order to solve the above technical problems, the purpose of this application is to provide an extrusion equipment for the production of special engineering films.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: an extrusion device for producing special engineering films, comprising an extruder barrel, an extrusion screw rotatably arranged in the extruder barrel, and a drive motor connected to the extrusion screw, the extrusion screw comprising a rod body and a thread, the rod body extending in the front-to-back direction, and from front to back, respectively, a feeding section, a separation section, a metering section and a mixing section, the outer diameter of the thread evenly spirally extending in the feeding section, the separation section and the metering section, the length of the separation section is 2-3 times the length of the feeding section, the length of the feeding section is greater than the length of the metering section and the mixing section, the bottom diameter of the metering section is greater than the bottom diameter of the feeding section, the thread of the separation section is provided with a separation groove that separates the thread into a first screw ridge and a second screw ridge, the volume of the separation groove gradually increases from front to back, and the aspect ratio of the extrusion screw is 33:1; the material of the extrusion screw is SKD11, and the material of the extruder barrel is 42CrMo.

[0005] In the above technical solution, it is further preferred that the lead of the thread of the feed section is consistent with the lead of the thread of the metering section.

[0006] In the above technical scheme, it is further preferred that the rear end face of the first screw ridge, the front end face of the second screw ridge and the surface of the rod body form the separation groove, the rear end face of the second screw ridge, the front end face of the first screw ridge and the surface of the rod body form a material groove, and the volume of the material groove gradually decreases from front to back.

[0007] In the above technical solution, it is further preferred that the width and depth of the separation groove gradually increase from front to back.

[0008] In the above technical solution, it is further preferred that the width and depth of the material trough gradually decrease from front to back.

[0009] In the above technical solution, it is further preferred that the extruder barrel includes an extrusion channel for installing the extrusion screw, and the inner wall surface of the extruder barrel is provided with a plurality of straight grooves, the plurality of straight grooves are distributed in sequence along the circumference of the extrusion channel, and each of the straight grooves extends in the front-to-back direction, and the straight grooves correspond to the position of the feed section.

[0010] In the above technical solution, it is further preferred that the inner wall of the extruder barrel is provided with an alloy layer.

[0011] In the above technical solution, it is further preferred that the mixing section is provided with a plurality of mixing groups spaced apart from front to back, each of the mixing groups comprises a plurality of mixing protrusions sequentially distributed along the circumference of the rod body, and each of the mixing protrusions is cylindrical.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The present application designs an extruder barrel and an extrusion screw for the production of special engineering films, so that the extrusion screw can fully melt and plasticize the material conveyed in the extruder barrel, thereby improving the quality of the product. The materials of the extruder barrel and the extrusion screw are specially configured to reduce the wear of the extrusion screw and the extrusion barrel and extend the service life of the extrusion equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of the structure of an extrusion screw of an extrusion device provided in an embodiment of the present application;

[0015] Figure 2 A schematic diagram of the structure of an extruder barrel of an extrusion equipment provided in an embodiment of the present application.

[0016] Among them: 100, extrusion equipment; 1, extruder barrel; 101, inlet; 102, outlet; 11, extrusion channel; 12, straight groove; 2, extrusion screw; 21, rod body; 211, feeding section; 212, separation section; 213, metering section; 214, mixing section; 22, thread; 221, first screw rib; 222, second screw rib; 23, separation groove; 24, material groove; 25, mixing group; 251, mixing protrusion. DETAILED DESCRIPTION

[0017] To describe the technical content, structural features, achieved purpose and effect of the application in detail, the technical solutions in the embodiments of the application will be described below in conjunction with the drawings in the embodiments of the application. Obviously, the described embodiments are only a part of the embodiments of the application, rather than all of the embodiments. In the following description, for the purpose of explanation, many specific details are set forth to provide a detailed description of various exemplary embodiments or implementations of the invention. However, various exemplary embodiments may also be implemented without these specific details or in the case of one or more equivalent arrangements. In addition, various exemplary embodiments may be different, but not necessarily exclusive. For example, without departing from the inventive concept, the specific shape, structure and characteristics of the exemplary embodiment may be used or implemented in another exemplary embodiment.

[0018] The “front” and “back” mentioned in this application are as follows: Figure 1 Before and after shown.

[0019] The embodiment of the present application provides an extrusion device for the production of special engineering films. The raw materials used for the production of special engineering films are relatively hard in texture, and the wear on the barrel and the extrusion screw is relatively serious, and the screw needs to be replaced frequently. Therefore, the extrusion equipment of the present application is designed according to the raw materials to reduce the wear of the extrusion equipment and improve the production efficiency of the extrusion equipment for special engineering films.

[0020] The extrusion device comprises an extruder barrel 1, an extrusion screw 2 rotatably arranged in the extruder barrel 1, and a driving motor connected to the extrusion screw 2. Figure 1 As shown, the extrusion screw 2 includes a rod body 21 and a thread 22. The rod body 21 extends in the front-to-back direction, and from front to back are a feed section 211, a separation section 212, a metering section 213 and a mixing section 214. The outer diameter of the thread 22 spirally extends evenly in the feed section 211, the separation section 212 and the metering section 213.

[0021] The lead of the threads 22 on the feeding section 211 is uniform and constant, so that the material can be stably fed in the feeding section 211 and stably transported in the forward direction.

[0022] The thread 22 of the separation section 212 is provided with a separation groove 23 for separating the thread 22 into a first screw fin 221 and a second screw fin 222. The rear end face of the first screw fin 221, the front end face of the second screw fin 222 and the surface of the rod body 21 form the separation groove 23, and the rear end face of the second screw fin 222, the front end face of the first screw fin 221 and the surface of the rod body 21 form a material groove 24, and the volume of the material groove 24 gradually decreases from front to back. The double screw fins of the separation section 212 shear the material violently, thereby plasticizing the material; in the embodiment of the present application, the groove width and groove depth of the separation groove 23 gradually increase from front to back; the groove width and groove depth of the material groove 24 gradually decrease from front to back, and the changes of the separation groove 23 and the material groove 24 are in line with the changes of the material.

[0023] The lead of the thread 22 on the metering section 213 is uniform and unchanged, and the lead of the thread 22 on the metering section 213 is equal to the lead of the thread 22 on the feeding section 211, the bottom diameter of the metering section 213 is larger than the bottom diameter of the feeding section 211, the depth of the thread 22 in the material groove of the feeding section 211 is greater than the depth of the material groove in the metering section 213, and the material enters the metering section 213 after being plasticized in the separation section 212, is compressed in the metering section 213, and a stable conveying pressure is established in the separation section 212.

[0024] The mixing section 214 is provided with a plurality of mixing groups 25 spaced from front to back, each mixing group 25 includes a plurality of mixing protrusions 251 sequentially distributed along the circumference of the rod body 21, and each mixing protrusion 251 is cylindrical; the mixing protrusions 251 of the mixing section 214 disperse and mix the materials, so that the extruded materials are more uniform, thereby improving the extrusion quality.

[0025] In the embodiment of the present application, the aspect ratio of the extrusion screw 2 is 33:1, the length of the separation section 212 is 2-3 times the length of the feed section 211, the length of the feed section 211 is greater than the length of the metering section 213 and the length of the mixing section 214, and the raw material is forwardly transported from the feed section 211 to the mixing section 214. During the transportation process, the thread 22 of the extrusion screw 2 shears and stirs the material during the rotation process. After the plasticized material is stabilized by the metering section 213, it is transported to the mixing section 214, and the material is output from the extruder barrel 1 after dispersion and mixing; the longer separation section 212 can plasticize the material over a long distance and for a long time, so that the material is fully plasticized, and the plasticization effect and plasticization quality are improved.

[0026] In order to reduce the wear of the extruder barrel 1 and the extruder screw 2, the material of the extruder screw 2 is SKD11, the material of the extruder barrel 1 is 42CrMo, and the inner wall is centrifugally cast with alloy powder to form an alloy layer.

[0027] like Figure 2 As shown, the extruder barrel 1 includes an extrusion channel 11 for installing the extrusion screw 2. The inner wall surface of the extruder barrel 1 is provided with a plurality of straight grooves 12. The plurality of straight grooves 12 are distributed in sequence along the circumference of the extrusion channel 11, and each straight groove 12 extends along the front-to-back direction. The straight grooves 12 correspond to the position of the feed section 211, thereby increasing the material intake of the feed section 211 and improving the production capacity of the extrusion equipment 100.

[0028] The extruder barrel 1 includes an inlet 101 for material input and an outlet 102 for molten material output. The inlet 101 is equipped with a feeding mechanism, which dries the material and controls the flow of the material entering the inlet 101; a metering pump and an extrusion die are installed at the outlet 102, and the metering pump controls the flow of the material delivered by the extruder barrel 1 to the extrusion die.

[0029] The present application designs an extruder barrel and an extrusion screw for the production of special engineering films, so that the extrusion screw can fully melt and plasticize the material conveyed in the extruder barrel, thereby improving the quality of the product. The materials of the extruder barrel and the extrusion screw are specially configured to reduce the wear of the extrusion screw and the extrusion barrel and extend the service life of the extrusion equipment.

[0030] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present application. Without departing from the spirit and scope of the present application, the present application may have various changes and improvements, and the scope of protection required by the present application is defined by the attached claims, description and their equivalents.

Claims

1. An extrusion device for producing special engineering films, comprising an extruder barrel, an extrusion screw rotatably arranged in the extruder barrel, and a drive motor drivingly connected to the extrusion screw, characterized in that: The extrusion screw comprises a rod body and a thread. The rod body extends in the front-to-back direction and is composed of a feeding section, a separation section, a metering section and a mixing section from front to back. The outer diameter of the thread is spirally extended evenly in the feeding section, the separation section and the metering section. The length of the separation section is 2-3 times the length of the feeding section. The length of the feeding section is greater than the lengths of the metering section and the mixing section. The bottom diameter of the metering section is greater than the bottom diameter of the feeding section. A separation groove is provided on the thread of the separation section to separate the thread into a first screw rib and a second screw rib. The volume of the separation groove gradually increases from front to back. The aspect ratio of the extrusion screw is 33:

1. The material of the extrusion screw is SKD11, and the material of the extruder barrel is 42CrMo.

2. The extrusion device according to claim 1, characterized in that The lead of the thread of the feeding section is consistent with the lead of the thread of the metering section.

3. The extrusion device according to claim 1, characterized in that The rear end face of the first screw flight, the front end face of the second screw flight and the surface of the rod body form the separation groove, and the rear end face of the second screw flight, the front end face of the first screw flight and the surface of the rod body form a material groove, and the volume of the material groove gradually decreases from front to back.

4. The extrusion device according to claim 3, characterized in that The groove width and groove depth of the separation groove gradually increase from front to back.

5. The extrusion device according to claim 3, characterized in that The width and depth of the material trough gradually decrease from front to back.

6. The extrusion device according to claim 1, characterized in that The extruder barrel includes an extrusion channel for installing the extrusion screw. The inner wall surface of the extruder barrel is provided with a plurality of straight grooves. The plurality of straight grooves are distributed in sequence along the circumference of the extrusion channel, and each of the straight grooves extends in the front-to-back direction. The straight grooves correspond to the position of the feed section.

7. The extrusion device according to claim 1, characterized in that The inner wall of the extruder barrel is provided with an alloy layer.

8. The extrusion device according to claim 1, characterized in that The mixing section is provided with a plurality of mixing groups spaced from front to back, each of the mixing groups comprises a plurality of mixing protrusions sequentially distributed along the circumference of the rod body, and each of the mixing protrusions is cylindrical.

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