Heating extrusion device for PPS production

Abstract

The invention relates to an extruder, and provides a heating extrusion device for PPS (polyphenylene sulfite) production, which comprises a horizontally arranged pipe body, a driving rod arranged in the pipe body, a spiral blade arranged on the driving rod, and a driving device connected with the driving rod, the pipe body is divided into a main material area, an auxiliary material area and a mixing and melting area in the flowing direction of materials in the pipe body. The auxiliary material area comprises a plurality of feeding devices arranged in the axial direction of the pipe body. Each feeding device comprises a first sleeve communicating with the side wall of the pipe body, a sliding block arranged in the first sleeve in a sliding mode, a second sleeve communicating with the side wall of the pipe body, a feeding device connected with the second sleeve and an air guide pipe used for connecting the first sleeve and the second sleeve. The ends, away from the pipe body, of the first sleeve and the second sleeve are both closed ends. A one-way valve is arranged on the first conduit. According to the heating extrusion device for PPS production, auxiliary materials can be automatically and uniformly added into main materials.

Description

Technical Field

[0001] The invention relates to the technical field of extruders, and in particular to a heating extrusion device for producing PPS. Background Art

[0002] Extrusion molding is also called extrusion in plastic processing. It refers to a processing method in which the material passes through the action between the extruder barrel and the screw, is heated and plasticized, and is pushed forward by the screw, and continuously passes through the die to be made into various cross-section products or semi-finished products.

[0003] Most long plastic products are produced by this method. PPS is polyphenylene sulfide, which has a relatively simple molecular structure. The main chain of the molecule is composed of benzene rings and sulfur atoms arranged alternately, which makes it have high crystallinity and flame retardancy. The sulfide bond as a flexible structure gives it good flexibility; thus, polyphenylene sulfide has the advantages of hardness and brittleness, high crystallinity, flame retardancy, good thermal stability, good electrical properties, and good wear resistance and creep resistance.

[0004] Different from other common polymer materials, pure PPS resin has poor toughness and low strength. Therefore, during processing, it needs to be modified more, that is, more additives (i.e. auxiliary materials) need to be added to give it certain properties, such as adding various fiber materials, reinforcing fillers, lubricants, compatibilizers, etc. The addition ratio and amount of each component have a decisive influence on the performance of the final PPS product. Most of the existing extruders only include one main material inlet and one auxiliary material inlet. Although they can be pre-mixed before being put into the extruder, uneven mixing is inevitable when there are many types of auxiliary materials. Therefore, it is necessary to design an extrusion device that can effectively target PPS production and processing. Summary of the invention

[0005] The object of the present invention is to provide a heating extrusion device for PPS production, which can automatically and evenly add auxiliary materials into main materials.

[0006] The embodiments of the present invention are realized by the following technical scheme: the heating extrusion device for PPS production of the present invention comprises a horizontally arranged tube body, a driving rod arranged in the tube body, a spiral blade arranged on the driving rod, and a driving device connected to the driving rod; along the flow direction of the material in the tube body, the tube body is divided into a main material area, an auxiliary material area, and a mixing area; the auxiliary material area comprises a plurality of feeding devices arranged along the axial direction of the tube body, the feeding device comprises a first sleeve connected to the side wall of the tube body, a slider slidably arranged in the first sleeve, a second sleeve connected to the side wall of the tube body, a feeding device connected to the second sleeve, and an air guide pipe for connecting the first sleeve and the second sleeve; the ends of the first sleeve and the second sleeve away from the tube body are both closed ends; a one-way valve is provided on the first conduit.

[0007] Furthermore, the feeding device also includes a spring arranged in the first sleeve; one end of the spring is connected to the inner wall of the first sleeve, and the other end is fixedly connected to the slider.

[0008] Furthermore, the first sleeve is arranged on the upper side wall of the tube body.

[0009] Furthermore, the second sleeve is arranged on the lower side wall of the tube body.

[0010] Furthermore, a portion of the sliding block disposed outside the first sleeve is provided with an arcuate surface; the direction of the arcuate surface is opposite to the rotation direction of the driving rod.

[0011] Further, the inner diameter of the first sleeve is greater than the inner diameter of the second sleeve.

[0012] Furthermore, the feeding device includes a feeding pipe connected to the side wall of the second sleeve, and a feeding hopper arranged at one end of the feeding pipe away from the second sleeve; the heights of the feeding pipe and the feeding hopper are both higher than the height of the second sleeve.

[0013] Furthermore, the auxiliary material area also includes a sealing cover sleeved on the outer wall of the tube body, and an electric heating device arranged between the sealing cover and the tube body; the first sleeve, the second sleeve, the feeding pipe and the air guide pipe are all arranged in the sealing cover.

[0014] Furthermore, the main material area includes a feed hopper connected to the side wall of the tube body; the feed hopper is arranged on the upper side of the tube body.

[0015] The technical solution of the embodiment of the present invention has at least the following advantages and beneficial effects: the heating extrusion device for PPS production of the present invention, when in use, puts the main material into the main material area, puts the auxiliary material into the auxiliary material area, and the main material and the auxiliary material are mixed and melted in the mixing area and then extruded and formed. In the process of putting in the auxiliary material, the auxiliary material is put into the feeding device, and then put into the second conduit through the feeding device. In the process of the driving rod and the blade rotating, the blade will periodically contact the slider and squeeze the slider into the first sleeve. After the slider is squeezed into the first sleeve, it will squeeze the air in the first sleeve and send the air into the second sleeve through the air guide tube. After the air enters the second sleeve, it will quickly spray the auxiliary material in the second sleeve into the tube body, and because the auxiliary material is sprayed under the action of air pressure, the auxiliary material can be directly sprayed into the interior of the main material and better mixed with the main material. In this way, through the rotation of the driving rod and the blades, the auxiliary material can be periodically and evenly added to the main material, and the adding speed of the auxiliary material is more constant, and the ratio of the main material to the auxiliary material is more precise. Even if there are multiple auxiliary materials, they can be added accurately (one feeding device is used for each auxiliary material). BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A schematic diagram of the structure of a heating extrusion device for PPS production provided in an embodiment of the present invention;

[0018] Figure 2 A schematic diagram of the internal structure of a heating extrusion device for PPS production provided by an embodiment of the present invention;

[0019] Figure 3 A schematic diagram of the structure inside a tube body provided by an embodiment of the present invention;

[0020] Figure 4 A schematic diagram of the structure inside the auxiliary material area provided in an embodiment of the present invention.

[0021] Icons: 11-tube body, 12-driving rod, 13-blade, 14-driving device, 15-main material area, 16-mixing area, 17-feed hopper, 20-auxiliary material area, 21-first sleeve, 22-slider, 23-check valve, 24-spring, 25-second sleeve, 26-air guide tube, 27-feeding pipe, 28-feeding hopper, 29-sealing cover. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0025] In the description of the present invention, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when used. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] Example

[0028] The following is further described in conjunction with specific embodiments. Figure 1 -Attached Figure 4As shown, the heating extrusion device for PPS production of this embodiment includes a horizontally arranged tube body 11, a driving rod 12 arranged in the tube body 11, a spiral blade 13 arranged on the driving rod 12, and a driving device 14 connected to the driving rod 12; along the flow direction of the material in the tube body 11, the tube body 11 is divided into a main material area 15, an auxiliary material area 20, and a mixing area 16; the auxiliary material area 20 includes a plurality of feeding devices arranged along the axial direction of the tube body 11, and the feeding device includes a first sleeve 21 connected to the side wall of the tube body 11, a slider 22 slidably arranged in the first sleeve 21, a second sleeve 25 connected to the side wall of the tube body 11, a feeding device connected to the second sleeve 25, and an air guide pipe 26 for connecting the first sleeve 21 and the second sleeve 25; the ends of the first sleeve 21 and the second sleeve 25 away from the tube body 11 are both closed ends; a one-way valve 23 is provided on the first conduit. Specifically, when in use, the main material (PPS) is put into the main material area 15, and the auxiliary material is put into the auxiliary material area 20. The main material and the auxiliary material are mixed and melted in the mixing area 16 and then extruded into shape. In the process of putting in the auxiliary material, the auxiliary material is put into the feeding device, and then put into the second conduit through the feeding device. In the process of the driving rod 12 and the blade 13 rotating, the blade 13 will periodically contact the slider 22 and squeeze the slider 22 into the first sleeve 21. After the slider 22 is squeezed into the first sleeve 21, it will squeeze the air in the first sleeve 21 and send the air into the second sleeve 25 through the air guide 26. After entering the second sleeve 25, the air will quickly spray the auxiliary material in the second sleeve 25 into the tube body 11. Since the auxiliary material is sprayed under the action of air pressure, the auxiliary material can be directly sprayed into the interior of the main material and better mixed with the main material. In this way, by the rotation of the driving rod 12 and the blade 13, the auxiliary material can be periodically added to the main material, and the adding speed of the auxiliary material is more constant, the ratio of the main material to the auxiliary material is more accurate, and even if there are multiple auxiliary materials, they can be added accurately (each auxiliary material uses a feeding device). The first one-way valve 23 is used to suck the external gas into the first sleeve 21. It should be noted that the principle of extruding the material in this embodiment is the principle of a conventional extruder, and the driving device 14 is a structure such as a motor and a gear box.

[0029] The feeding device in this embodiment further includes a spring 24 disposed in the first sleeve 21; one end of the spring 24 is connected to the inner wall of the first sleeve 21, and the other end is fixedly connected to the slider 22. Specifically, the spring 24 can better push the slider 22 out of the first sleeve 21.

[0030] In this embodiment, the first sleeve 21 is arranged on the upper side wall of the tube body 11. The second sleeve 25 is arranged on the lower side wall of the tube body 11. Specifically, in the main material area 15 and the auxiliary material area 20, the material does not completely fill the tube body 11, and the material has not melted at this time, so the material is still in a granular state. The first sleeve 21 is arranged above the tube body 11 to prevent the material particles from entering the first sleeve 21. The second sleeve 25 is arranged on the lower side of the tube body 11, so that the auxiliary material can be better injected into the main material.

[0031] The portion of the slider 22 disposed outside the first sleeve 21 in this embodiment is provided with an arc surface, the direction of the arc surface is opposite to the rotation direction of the driving rod 12. Specifically, the blade 13 can better press the slider 22 into the first sleeve 21 in this way.

[0032] In this embodiment, the inner diameter of the first sleeve 21 is greater than the inner diameter of the second sleeve 25. Specifically, the larger the diameter of the first sleeve 21, the greater the amount of airflow from the first sleeve 21 into the second sleeve 25, while the smaller the diameter of the second sleeve 25, the faster the flow rate of the airflow ejected from the second sleeve 25 under the premise of the same air volume.

[0033] The feeding device in this embodiment includes a feeding pipe 27 connected to the side wall of the second sleeve 25, and a feeding hopper 28 provided at one end of the feeding pipe 27 away from the second sleeve 25; the heights of the feeding pipe 27 and the feeding hopper 28 are both higher than the height of the second sleeve 25. Specifically, the material in the feeding pipe 27 and the feeding hopper 28 will flow into the second sleeve 25, and the airflow in the first sleeve 21 will enter the second sleeve 25 through the air guide pipe 26. After the material in the second sleeve 25 is blown into the tube body 11, the material in the feeding pipe 27 will continue to flow into the second sleeve 25, forming a cycle.

[0034] The auxiliary material area 20 in this embodiment also includes a sealing cover 29 sleeved on the outer wall of the tube body 11, and an electric heating device arranged between the sealing cover 29 and the tube body 11; the first sleeve 21, the second sleeve 25, the feeding pipe 27 and the air guide pipe 26 are all arranged in the sealing cover 29. Specifically, the sealing cover 29 is used to cover the above structure, and then the electric heating device can be used to heat it, which is equivalent to preheating the auxiliary material and the main material. It should be noted that the sealing cover 29 is not completely sealed, and it is still necessary to balance the air pressure difference between it and the outside world.

[0035] The main material area 15 in this embodiment includes a feed hopper 17 connected to the side wall of the tube body 11 ; the feed hopper 17 is arranged on the upper side of the tube body 11 .

[0036] In summary, the heating extrusion device for PPS production of this embodiment, when in use, puts the main material into the main material area 15, puts the auxiliary material into the auxiliary material area 20, and the main material and the auxiliary material are mixed and melted in the mixing area 16 and then extruded and formed. In the process of putting in the auxiliary material, the auxiliary material is put into the feeding device, and then put into the second conduit through the feeding device. In the process of rotating the driving rod 12 and the blade 13, the blade 13 will periodically contact the slider 22, and squeeze the slider 22 into the first sleeve 21. After the slider 22 is squeezed into the first sleeve 21, it will squeeze the air in the first sleeve 21, and send the air into the second sleeve 25 through the air guide 26. After entering the second sleeve 25, the air will quickly spray the auxiliary material in the second sleeve 25 into the tube body 11, and because the auxiliary material is sprayed under the action of air pressure, the auxiliary material can be directly sprayed into the interior of the main material and better mixed with the main material. In this way, by driving the rod 12 and the blade 13 to rotate, the auxiliary material can be periodically added to the main material, and the adding speed of the auxiliary material is more constant, and the ratio of the main material to the auxiliary material is more precise. Even if there are multiple auxiliary materials, they can be added accurately (one feeding device is used for each auxiliary material).

[0037] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A heating extrusion device for PPS production, characterized in that: It comprises a horizontally arranged tube body (11), a driving rod (12) arranged in the tube body (11), a spiral blade (13) arranged on the driving rod (12), and a driving device (14) connected to the driving rod (12); Along the flow direction of the material in the tube body (11), the tube body (11) is divided into a main material area (15), an auxiliary material area (20), and a mixing area (16); The auxiliary material area (20) comprises a plurality of feeding devices arranged along the axial direction of the tube body (11), the feeding devices comprising a first sleeve (21) connected to the side wall of the tube body (11), a slider (22) slidably arranged in the first sleeve (21), a second sleeve (25) connected to the side wall of the tube body (11), a feeding device connected to the second sleeve (25), and an air guide tube (26) for connecting the first sleeve (21) and the second sleeve (25); the ends of the first sleeve (21) and the second sleeve (25) away from the tube body (11) are both closed ends; and a one-way valve (23) is provided on the first conduit.

2. The heating extrusion device for PPS production according to claim 1, characterized in that: The feeding device further comprises a spring (24) arranged in the first sleeve (21); one end of the spring (24) is connected to the inner wall of the first sleeve (21), and the other end is fixedly connected to the slider (22).

3. The heating extrusion device for PPS production according to claim 1, characterized in that: The first sleeve (21) is arranged on the upper side wall of the tube body (11).

4. The heating extrusion device for PPS production according to claim 3, characterized in that: The second sleeve (25) is arranged on the lower side wall of the tube body (11).

5. The heating extrusion device for PPS production according to claim 1, characterized in that: The portion of the slider (22) disposed outside the first sleeve (21) is provided with an arc-shaped surface; the direction of the arc-shaped surface is opposite to the rotation direction of the driving rod (12).

6. The heating extrusion device for PPS production according to claim 1, characterized in that: The inner diameter of the first sleeve (21) is greater than the inner diameter of the second sleeve (25).

7. The heating extrusion device for PPS production according to claim 1, characterized in that: The feeding device comprises a feeding pipe (27) connected to the side wall of the second sleeve (25), and a feeding hopper (28) arranged at one end of the feeding pipe (27) away from the second sleeve (25); the heights of the feeding pipe (27) and the feeding hopper (28) are both higher than the height of the second sleeve (25).

8. The heating extrusion device for PPS production according to claim 7, characterized in that: The auxiliary material area (20) further comprises a sealing cover (29) sleeved on the outer wall of the tube body (11), and an electric heating device arranged between the sealing cover (29) and the tube body (11); the first sleeve (21), the second sleeve (25), the feeding pipe (27) and the air guide pipe (26) are all arranged in the sealing cover (29).

9. The heating extrusion device for PPS production according to claim 1, characterized in that: The main material area (15) comprises a feed hopper (17) connected to the side wall of the tube body (11); the feed hopper (17) is arranged on the upper side of the tube body (11).

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