A polymer sheet twin-screw extrusion apparatus

Abstract

The application belongs to the field of double screw extrusion, and particularly relates to a high polymer sheet double screw extrusion device, which comprises an extrusion cylinder, a plurality of extrusion cylinders arranged side by side, a shell, a part of the top of the shell being respectively detachably connected with a sealing plate, and the top of another one or more shells being respectively detachably connected with a feeding plate, a hollow channel being formed between the shell and the sealing plate and the feeding plate, a cylinder body being installed in the hollow channel, an extrusion cavity being formed in the inside of the cylinder body on the plurality of extrusion cylinders, double screws being arranged in the extrusion cavity, a feeding pipe being detachably connected with the feeding plate, the feeding pipe being communicated with the extrusion cavity and connected with a feeding device, compared with the prior art, the two plates are connected to the shell, so that the corresponding specific cylinder body can realize the function of intermediate feeding, and the quantity and position of the intermediate feeding can be adjusted, the production process can be adjusted in real time, and the transformation demand of the production line can be met.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of double screw extrusion, and particularly relates to a high polymer sheet double screw extrusion device. BACKGROUND

[0002] A double screw extruder is developed on the basis of a single screw extruder, and has been widely applied to the forming processing of extruded products, such as the production of high polymer sheets, due to good feeding performance, mixing plasticizing performance, exhaust performance and extrusion stability. In the extrusion process, the raw material (thermoplastic rubber, etc.) needs to be extruded, and then the extruded product is wound into a sheet for subsequent processing. In the extrusion process, a double screw extrusion device is often used. Since some additives need to be added in the middle and rear sections of the double screw extrusion device during extrusion, a feeding device is often added to the double screw extrusion device in the prior art. However, the feeding device is often fixed at a specific position and cannot be adjusted, which is not conducive to quickly changing the feeding position and leads to a large overall modification of the double screw extrusion device when the process is changed or the production line needs to be modified. SUMMARY

[0003] The application aims to provide a high polymer sheet double screw extrusion device to solve the problems in the prior art. The technical scheme adopted by the application is as follows.

[0004] A high polymer sheet double screw extrusion device, comprising an extrusion cylinder, a plurality of the extrusion cylinders are arranged side by side, the extrusion cylinder comprises a shell, the shell is in a "N" shape structure, the top of a part of the shell is detachably connected with a sealing plate respectively, the top of one or more of the shells is detachably connected with a feeding plate respectively, a hollow channel is formed between the shell and the sealing plate and the feeding plate, a cylinder body is installed in the hollow channel, an extrusion cavity is formed in the inside of the cylinder body on the plurality of extrusion cylinders, a double screw is arranged in the extrusion cavity, the feeding plate is detachably connected with a feeding pipe, the feeding pipe is communicated with the extrusion cavity and connected with a feeding device.

[0005] Further, the top of the cylinder body is provided with a through hole communicated with the extrusion cavity, one end of the feeding pipe is connected with a connecting pipe, the connecting pipe is detachably connected with the feeding plate and communicated with the through hole.

[0006] Further, the top of the connecting pipe is rotatably connected with a rotating pipe, the rotating pipe is coaxially arranged with the connecting pipe and communicated with the connecting pipe, an adjusting part is arranged in the rotating pipe to adjust the flow when the rotating pipe rotates, the top of the rotating pipe is rotatably connected with an intermediate pipe, and the intermediate pipe is detachably connected with the feeding pipe.

[0007] Further, the adjusting component comprises a first baffle fixedly arranged in the rotating pipe, a plurality of hollow portions are distributed on the first baffle, a second baffle with the same structure as the first baffle is fixedly arranged in the connecting pipe, and the second baffle is attached to the bottom surface of the first baffle. The hollow portions on the first baffle and the second baffle are arranged alternately.

[0008] Further, the top of the connecting pipe is provided with a first large-diameter portion, the first large-diameter portion is connected to the feeding plate through a plurality of screws, the bottom of the rotating pipe is provided with a second large-diameter portion, the second large-diameter portion is provided with arc-shaped holes corresponding to the plurality of screws and suitable for the plurality of screws, and the top of the screw extends out of the arc-shaped hole.

[0009] Further, the top of the cylinder body is provided with a through hole communicating with the extrusion cavity, and the bottom of the sealing plate is provided with a protruding portion suitable for the through hole and inserted into the through hole.

[0010] Further, an annular member is arranged between two adjacent extrusion cylinders, the cross section of the annular member is in the shape of a Chinese character 'n', both side end faces of the cylinder body are provided with annular notches suitable for the annular member, the annular notches are in a stepped structure, and the annular notches of two adjacent cylinder bodies jointly form an annular groove, and the annular member is clamped in the annular groove.

[0011] Further, one end of the extrusion cylinder is provided with a discharging baffle, the other end is provided with a connecting baffle, the discharging baffle and the connecting baffle are respectively detachably connected to the shell located at the two ends, and the annular member is arranged between the discharging baffle and the connecting baffle and between the connecting baffle and the shell.

[0012] Further, the shells on two adjacent extrusion cylinders are detachably connected, opposite inner sides of the shell are provided with inner protrusions, both sides of the cylinder body are provided with clamping grooves suitable for the inner protrusions, the inner protrusions are clamped in the clamping grooves, and a plurality of inner protrusions are arranged side by side.

[0013] The application has the following beneficial effects: the number of feeding plates is adjusted according to specific production processes, in the process of double-screw extrusion, several feeding plates are arranged if several materials need to be added in the middle, the shell is connected through the feeding plate, the corresponding cylinder body can be fed, the sealing plate is connected to the cylinder body which does not need to be fed in the middle to ensure the sealing of the extrusion cavity, compared with the prior art, the shell is connected to the two plates, so that the corresponding specific cylinder body can realize the function of intermediate feeding, and then the number and position of intermediate feeding can be adjusted, the production process can be adjusted in real time, and the transformation demand of the production line can be met. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 The present application is a front view and a side view schematic diagram.

[0015] Figure 2 is a schematic view of a cross-sectional view;

[0016] Figure 3 is a schematic view of a cross-sectional view; Figure 2 is a schematic view of a cross-sectional view;

[0017] Figure 4 is a schematic view of a cross-sectional view;

[0018] Figure 5 is a schematic view of a cross-sectional view;

[0019] Figure 6 is a schematic view of a cross-sectional view;

[0020] Figure 7 is a schematic view of a cross-sectional view;

[0021] Figure 8 is a schematic view of a cross-sectional view;

[0022] Figure 9 is a schematic view of a cross-sectional view. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings. Figures 1-9 The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings.

[0024] As Figure 1 A high polymer sheet double screw extrusion device, comprising an extrusion cylinder, a plurality of the extrusion cylinders are arranged side by side, the extrusion cylinder comprises a shell 1, the shell 1 is in a "N" shape structure, wherein a part of the top of the shell 1 is respectively detachably connected with a sealing plate 11, and the top of another one or more of the shell 1 is respectively detachably connected with a feeding plate 12, a hollow channel is formed between the shell 1 and the sealing plate 11 and the feeding plate 12, a cylinder body 7 is installed in the hollow channel, the inside of the cylinder body 7 on the plurality of the extrusion cylinders forms an extrusion cavity, a double screw 10 is arranged in the extrusion cavity, the feeding plate 12 is detachably connected with a feeding pipe 19, the feeding pipe 19 is communicated with the extrusion cavity and connected with a feeding device.

[0025] Specifically, the double screw 10 is the prior art, which is a screw structure arranged side by side, the shape of the extrusion cavity is matched with it, which is an oval shape, the inside of the shell 1 and the sealing plate 11 or the feeding plate 12 jointly form a square hollow channel for mounting the barrel 7, the barrel 7 is used to form the extrusion cavity, the extrusion cavity is uniformly and continuously distributed along the axial direction of the double screw 10, the feeding device can be a solid feeding device, such as a dragon output machine, which is used to add solid materials into the extrusion cavity, or a liquid feeding device, such as a pump body, which is used to add liquid materials into the extrusion cavity.

[0026] The number of the feeding plate 12 is adjusted according to the specific production process, if the intermediate feeding is required during the extrusion process of the double screw 10, several feeding plates 12 are arranged, the shell 1 is connected through the feeding plate 12, so that the corresponding barrel 7 can be fed, and the other barrels 7 without intermediate feeding are connected with the sealing plate 11 to ensure the sealing of the extrusion cavity. Compared with the prior art, the two plates are connected to the shell 1 in the present application, so that the corresponding specific barrel 7 can realize the function of intermediate feeding, and then the number and position of the intermediate feeding can be adjusted, which is convenient for real-time adjustment of the production process and can meet the transformation needs of the production line.

[0027] As Figures 5-8 , the specific connection structure of the feeding plate 12 is described below:

[0028] Further, the top of the barrel 7 is provided with a through hole communicating with the extrusion cavity, one end of the feeding pipe 19 is connected with the connecting pipe 14, the connecting pipe 14 is detachably connected with the feeding plate 12 and communicates with the through hole.

[0029] The bottom of the connecting pipe 14 is inserted into the through hole and is sealingly connected with the through hole, for example, sealing filler, sealing ring, etc.

[0030] Further, the top of the connecting pipe 14 is rotatably connected with the rotating pipe 15, the rotating pipe 15 is coaxially arranged with the connecting pipe 14 and communicates with the connecting pipe 14, the rotating pipe 15 is provided with an adjusting part inside for adjusting the flow when the rotating pipe 15 rotates, the top of the rotating pipe 15 is rotatably connected with the intermediate pipe 18, and the intermediate pipe 18 is detachably connected with the feeding pipe 19.

[0031] The purpose of the rotating pipe 15 is to adjust the flow, so as to adjust the flow of the material into the extrusion cavity, avoid the accumulation of the material in the through hole, and meet the mixing needs between the raw materials and the added materials. When the rotating pipe 15 rotates, the connecting pipe 14 and the intermediate pipe 18 are relatively stationary.

[0032] Further, the adjusting component comprises a first baffle 17 fixedly arranged in the rotating pipe 15, and a plurality of hollow portions are distributed on the first baffle 17; a second baffle 16 identical in structure to the first baffle 17 is fixedly arranged in the connecting pipe 14, and the second baffle 16 is attached to the bottom surface of the first baffle 17. The hollow portions on the first and second baffles are arranged alternately.

[0033] The hollow portions are uniformly distributed around the circumference of the rotating pipe 5, and can be in the shape of a fan structure; when the rotating pipe 15 rotates, the first baffle 17 rotates, the second baffle 16 is static, and the area of the hollow portions on the first and second baffles changes alternately, thereby achieving the purpose of adjusting the flow.

[0034] Further, the top of the connecting pipe 14 is provided with a first large-diameter portion, the first large-diameter portion is connected to the feeding plate 12 through a plurality of screws, the bottom of the rotating pipe 15 is provided with a second large-diameter portion, the second large-diameter portion is provided with a plurality of arc-shaped holes corresponding to the plurality of screws and suitable for the plurality of screws, and the top of the plurality of screws extends out of the arc-shaped holes.

[0035] The outer diameters of the first and second large-diameter portions are the same, and the first and second large-diameter portions are in the shape of a ring structure; the plurality of screws are uniformly distributed around the circumference of the connecting pipe 14, and the arc-shaped holes are coaxially arranged with the connecting pipe 14; when the rotating pipe 15 rotates, the arc-shaped holes move along the circumference of the connecting pipe 14, so that the screws relatively move in the arc-shaped holes; the purpose of the arc-shaped holes is to limit the rotation angle of the rotating pipe 15, and when the screws are tightened, the screws press the second large-diameter portion, so as to achieve the purpose of limiting, lock the rotating pipe 15, and the screws also detachably connect the rotating pipe 15 and the connecting pipe 14 to the feeding plate 12.

[0036] As Figure 9 For the specific structure of the sealing plate 11, the top of the cylinder body 7 is provided with a through hole communicating with the extrusion cavity, and the bottom of the sealing plate 11 is provided with a protruding portion suitable for the through hole, and the protruding portion is inserted into the through hole.

[0037] The protruding portion seals the through hole, and a sealing filler, a sealing ring or the like can be arranged between the protruding portion and the through hole.

[0038] In addition, the sealing plate 11 and the feeding plate 12 can be connected to the shell 1 through screws.

[0039] As Figures 1-4 The specific connection structure between the cylinder body 7 and the shell 1 will be described below:

[0040] Furthermore, an annular member 9 is provided between two adjacent extrusion barrels. The cross-section of the annular member 9 is in an "丄" shape. Annular notches 21 adapted to the annular member 9 are provided on both end faces of the barrel body 7. The annular notches 21 are of a stepped structure. The annular notches 21 of two adjacent barrel bodies 7 together form an annular groove, and the annular member 9 is snap-fitted in the annular groove.

[0041] The annular member 9 is in an elliptical annular structure adapted to the extrusion cavity. An annular protrusion is provided on its outer peripheral surface, so that the cross-section is in an "丄" shape. The outer side of the annular member 9 is snap-fitted in the annular groove, and the inner side surface is flush with the inner side of the barrel body 7. While not affecting the uniformity of the extrusion cavity, the annular member 9 serves the purpose of positioning, enabling precise fitting between two adjacent barrel bodies 7, and also realizing the sealing function. Sealing fillers, sealing rings and other components can be provided between the outer peripheral surface of the annular member 9 and the barrel body 7.

[0042] Furthermore, a blanking baffle 4 is provided at one end of the extrusion barrel, and a connecting baffle 2 is provided at the other end. The blanking baffle 4 and the connecting baffle 2 are respectively detachably connected to the shells 1 at both ends, and the annular member 9 is provided between them and the shells 1.

[0043] The functions of the blanking baffle 4 and the connecting baffle 2 are to seal both ends of the extrusion cavity. They can be connected to the shells 1 at both ends by screws, and corresponding annular grooves are provided between them and the shells 1. An extrusion head 5 in the prior art is provided on the blanking baffle 4 for discharging materials, and a driving component in the prior art can be provided outside the connecting baffle 2. The driving component is connected to the double screw 10 for driving the double screw 10 to rotate. The driving component can include a motor, a gear transmission component, etc.

[0044] In addition, blind holes are provided at the ends of the double screw 10. The blind holes are sleeved on the fixed rods 6. There are two corresponding fixed rods 6. The other ends of the fixed rods 6 are fixedly connected to the inner side of the blanking baffle 4. The purpose of the fixed rods 6 is to stabilize the rotation of the double screw 10.

[0045] Furthermore, the shells 1 on two adjacent extrusion barrels are detachably connected. Inner protrusions are provided on both inner sides of the shell 1 that face each other. Card slots adapted to the inner protrusions are provided on both sides of the barrel body 7. The inner protrusions are snap-fitted in the card slots, and multiple inner protrusions are arranged side by side.

[0046] The outer side surface of the shell 1 is fixedly connected to the fixed frames 13. There are two fixed frames 13, which are respectively located at both ends of the shell 1 and are flush with the end face of the shell 1. The fixed frames 13 on two adjacent shells 1 are in contact and connected by screws. The purpose of the inner protrusions is to position the barrel body 7 and fix the position of the barrel body 7 in the extending direction of the extrusion cavity.

[0047] The above described embodiments are only to illustrate the preferred modes of the present application, and are not intended to limit the scope of the present application. Any modification, variation, modification, and replacement of the technical solutions of the present application made by those skilled in the art without departing from the design spirit of the present application shall fall within the protection scope determined by the claims of the present application.

Claims

1. A polymer sheet twin-screw extrusion apparatus, characterized by: The extrusion barrel comprises a shell (1) in the shape of a "N" character structure, wherein a part of the top of the shell (1) is detachably connected with a sealing plate (11), and another part of the top of the shell (1) is detachably connected with a feeding plate (12), and a hollow channel is formed between the shell (1), the sealing plate (11) and the feeding plate (12), wherein a barrel body (7) is installed in the hollow channel, and the inside of the barrel body (7) on the extrusion barrel forms an extrusion cavity, a double screw (10) is arranged in the extrusion cavity, the feeding plate (12) is detachably connected with a feeding pipe (19), the feeding pipe (19) is connected with the extrusion cavity, and a feeding device is connected; A through hole is arranged on the top of the barrel body (7) and communicates with the extrusion cavity, and a protruding part is arranged on the bottom of the sealing plate (11) and is matched with the through hole, and the protruding part is inserted into the through hole; An annular part (9) is arranged between two adjacent extrusion barrels, the cross section of the annular part (9) is in the shape of a "L" character, and annular notches (21) matched with the annular part (9) are arranged on the two side end faces of the barrel body (7), the annular notches (21) are in a stepped structure, and the annular notches (21) of two adjacent barrel bodies (7) jointly form an annular groove, and the annular part (9) is clamped in the annular groove.

2. The polymer sheet twin-screw extrusion apparatus according to claim 1, characterized by: A through hole is arranged on the top of the barrel body (7) and communicates with the extrusion cavity, and a feeding pipe (19) is connected with a connecting pipe (14), the connecting pipe (14) is detachably connected with the feeding plate (12) and communicates with the through hole.

3. The polymer sheet twin-screw extrusion apparatus according to claim 2, wherein: A rotating pipe (15) is rotatably connected to the top of the connecting pipe (14), the rotating pipe (15) is coaxially arranged with the connecting pipe (14) and communicates with the connecting pipe (14), an adjusting part is arranged in the rotating pipe (15) to adjust the flow when the rotating pipe (15) rotates, and an intermediate pipe (18) is rotatably connected to the top of the rotating pipe (15), and the intermediate pipe (18) is detachably connected with the feeding pipe (19).

4. The polymer sheet twin-screw extrusion apparatus according to claim 3, wherein: The adjusting part comprises a first baffle (17) fixedly arranged in the rotating pipe (15), a plurality of hollow parts are arranged on the first baffle (17), a second baffle (16) identical in structure with the first baffle (17) is fixedly arranged in the connecting pipe (14), the second baffle (16) is attached to the bottom surface of the first baffle (17), and the hollow parts on the first and second baffles are arranged alternately.

5. The polymer sheet twin-screw extrusion apparatus according to claim 3, wherein: A first large-diameter part is arranged on the top of the connecting pipe (14), the first large-diameter part is connected with the feeding plate (12) through a plurality of screws, a second large-diameter part is arranged on the bottom of the rotating pipe (15), the second large-diameter part is provided with arc-shaped holes corresponding to the plurality of screws and matched with the plurality of screws, and the top of the screws extends out of the arc-shaped holes.

6. The polymer sheet twin-screw extrusion apparatus according to claim 1, wherein: The extrusion barrel is provided with a discharging baffle (4) at one end and a connecting baffle (2) at the other end, the discharging baffle (4) and the connecting baffle (2) are respectively detachably connected to the shell (1) at the two ends, and the annular part (9) is arranged between the shell (1) and the discharging baffle (4) and the connecting baffle (2).

7. The polymer sheet twin-screw extrusion apparatus according to claim 1, wherein: The shells (1) on two adjacent extrusion barrels are detachably connected, the two opposite inner sides of the shell (1) are provided with inner protrusions, the two sides of the barrel (7) are provided with clamping grooves matched with the inner protrusions, the inner protrusions are clamped in the clamping grooves, and the inner protrusions are provided with a plurality of inner protrusions in parallel.

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