An extrusion device for producing a modified master batch

Abstract

This utility model discloses an extrusion device for producing modified masterbatch. Through a collaborative innovation structure, it solves problems such as material blockage, high moisture content, and shaft overheating. The device includes a primary feeding structure, an extrusion chamber, a water pumping assembly, and a secondary feeding structure. The primary feeding structure uses a funnel-shaped feed cylinder with an inclined dispersing rod inside, which works in conjunction with a vertically positioned first auger to break up and compact agglomerated materials before conveying them to the extrusion chamber. A heating module is embedded in the wall of the extrusion chamber, transferring heat to the melting zone. A horizontally hollow second rotating shaft has a non-rotating sleeve inside, with a condensate pipe inside to achieve dynamic shaft cooling and reduce thermal friction of the second rotating shaft. The water pumping assembly inserts an inclined water pumping needle into the extrusion chamber, utilizing a negative pressure system formed by a small-diameter channel at the front end, a large-diameter channel at the rear end, and a piston head to efficiently extract free moisture. The secondary feeding structure, located in the middle of the extrusion chamber, replenishes the modifier, significantly improving masterbatch density and production continuity.

Description

Technical Field

[0001] This utility model relates to the technical field of tissue paper processing equipment, specifically an extrusion device for producing modified masterbatch. Background Technology

[0002] Modified masterbatch, as a core material for plastic modification, directly determines product quality through the performance of the extrusion equipment during its production. Current mainstream equipment suffers from the following technical problems: 1. Defective moisture control: Traditional processes rely on post-extrusion drying, but free water within the material cannot be effectively removed during the melting stage, leading to micropores in the masterbatch and a 20%-30% decrease in tensile strength; 2. Poor material feeding stability: Powder adheres to the barrel wall due to electrostatic adsorption, forming an arching effect, resulting in a high blockage rate and requiring frequent shutdowns for manual cleaning, leading to significant capacity loss; 3. Imbalanced thermal management: Friction between the rotating shaft and the melt generates heat, causing thermal degradation of the material and resulting in other particles being mixed into the finished product.

[0003] Therefore, there is an urgent need to develop an integrated and efficient extrusion device that can achieve in-situ moisture removal, zero material blockage, and precise control of the thermal field. Utility Model Content

[0004] The purpose of this invention is to provide an extrusion device for producing modified masterbatch, so as to solve the defects mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an extrusion device for producing modified masterbatch, comprising a primary feeding structure, an extrusion chamber, a water pumping assembly, and a secondary feeding structure;

[0006] The primary feeding structure includes a funnel-shaped feeding cylinder, and the discharge port of the feeding cylinder is located at the front end of the extrusion chamber.

[0007] The extrusion chamber includes a heating module disposed in the interlayer of the chamber wall. The heat of the heating module is directly conducted to the melting zone inside the chamber wall. The interior of the extrusion chamber is provided with a second rotating shaft and a second auger sleeved thereon. The second rotating shaft is defined as being arranged laterally by a bearing seat. One side of the second rotating shaft extends to the outside of the extrusion chamber and is sleeved with a first bevel gear. The first bevel gear meshes with the second bevel gear on the third rotating shaft and drives each other. The third rotating shaft is connected to the output shaft of the second motor.

[0008] The inner side of the second rotating shaft is hollow and a sleeve is installed inside. The sleeve does not rotate with the second rotating shaft, and a condensate pipe is embedded in the cavity of the sleeve.

[0009] The pumping assembly includes an upper pipe, a lower pipe extending downward from the middle of the upper pipe, and a pumping needle at the bottom of the lower pipe. During assembly, the pumping needle is obliquely positioned inside the extrusion chamber. A front-end channel and a rear-end channel are formed inside the lower pipe. The front-end channel communicates with the flow channel inside the pumping needle. The channel diameter of the front-end channel is smaller than that of the rear-end channel. A piston head is built into the rear-end channel. The piston head is connected to a pull rod that passes through the lower pipe. The outlet pipe is perpendicular to the upper pipe and extends outward. One side of the outlet pipe is connected to the rear-end channel, and the other side of the outlet pipe is equipped with a switch valve.

[0010] Preferably, the top of the feeding cylinder is provided with a feeding opening, the middle of the feeding cylinder is provided with a first motor, the first motor drives the first rotating shaft to rotate, several sets of connecting rods are installed on the first rotating shaft, the ends of several sets of connecting rods are connected to an inclined dispersing rod, the dispersing rod is parallel to the side wall of the feeding cylinder, and the bottom of the first rotating shaft is connected to a first auger, the first auger is vertically arranged.

[0011] Preferably, the secondary feeding structure has the same structural specifications as the primary feeding structure, and both the primary and secondary feeding structures are provided with limiting plates on their outer sides for positioning and limiting.

[0012] The secondary feeding structure is located in the middle of the extrusion chamber's travel direction.

[0013] Preferably, the second motor is mounted on a bracket outside the extrusion chamber.

[0014] Preferably, the third rotation axis is arranged perpendicular to the second rotation axis.

[0015] Preferably, the condensate pipe is arranged in a U-shape or S-shape inside the sleeve, and the temperature of the condensate pipe is indirectly transferred to the second rotating shaft through the sleeve.

[0016] Preferably, a wristband is provided at the top of the pull rod on the outward side.

[0017] Preferably, the inlet and outlet of the melting zone have a conical narrowing structure.

[0018] Preferably, the pumping assembly is installed on the extrusion chamber at an angle of 30-45°.

[0019] Preferably, the sleeve is fixed to the end cover of the extrusion chamber by a bearing and has no contact with the second rotating shaft.

[0020] Preferably, the discharge port of the secondary feeding structure is lower than the end of the discharge port of the primary feeding structure.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows: By setting the water pumping component at an angle and inserting it into the extrusion chamber, the piston head is pulled upward by the puller to guide the water inside the extrusion chamber to the water outlet pipe, and the switch valve is opened to release the excess water; by setting the negative pressure of the piston head to draw out the water, the micropores in the extruded material are reduced, and impurities are filtered out at the same time. Compared with the traditional process, the moisture content of the masterbatch is effectively reduced; this solution sets a two-stage feeding mechanism to facilitate the feeding of different materials in different areas. Feeding in the middle of the melting zone improves the uniformity of the modifier dispersion; by setting the second rotating shaft to a hollow structure and simultaneously using nested tube cooling, the second rotating shaft is indirectly cooled, effectively reducing the temperature of the second rotating shaft and preventing it from becoming too hot, which facilitates continuous operation and improves processing efficiency. Attached Figure Description

[0022] Figure 1 This is a cross-sectional view of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the second rotating shaft of this utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the condensate pipe of this utility model;

[0025] Figure 4 This is a schematic diagram of the internal structure of the pumping component of this utility model.

[0026] In the figure: primary feeding structure (100), feeding cylinder (101), first motor (102), first rotating shaft (103), connecting rod (104), dispersing rod (105), first auger (106), limit plate (107);

[0027] Extrusion chamber (200), heating module (201), melting zone (202), second rotating shaft (203), first bevel gear (204), second auger (205), second bevel gear (206), third rotating shaft (207), second motor (208), bearing housing (209), sleeve (210), condensate pipe (211);

[0028] Pumping assembly (300), upper pipe (301), pumping needle (302), lower pipe (303), front channel (304), rear channel (305), piston head (306), pull rod (307), wristband (308), outlet pipe (309), switch valve (310);

[0029] Two-stage feeding structure (400). Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Please see Figure 1-4 One embodiment of this utility model is an extrusion device for producing modified masterbatch, comprising a primary feeding structure 100, an extrusion chamber 200, a water pumping assembly 300, and a secondary feeding structure 400.

[0032] The primary feeding structure 100 includes a funnel-shaped feeding cylinder 101. The discharge port of the feeding cylinder 101 is located at the front end of the extrusion chamber 200. Specifically, the top of the feeding cylinder 101 is provided with a feeding opening, and the middle of the feeding cylinder 101 is provided with a first motor 102. The first motor 102 drives the first rotating shaft 103 to rotate. Several sets of connecting rods 104 are installed on the first rotating shaft 103. The ends of the several sets of connecting rods 104 are connected to an inclined dispersing rod 105. The dispersing rod 105 is parallel to the side wall of the feeding cylinder 101. The bottom of the first rotating shaft 103 is connected to a first auger 106, which is vertically arranged.

[0033] To achieve effective material replenishment, this utility model also provides a secondary feeding structure 400. The secondary feeding structure 400 has the same structural specifications as the primary feeding structure 100. Both the primary feeding structure 100 and the secondary feeding structure 400 are provided with limiting discs 107 on their outer sides for positioning and limiting. The secondary feeding structure 400 is located in the middle of the extrusion chamber 200 in the traveling direction. The second motor 208 is mounted on a bracket outside the extrusion chamber 200.

[0034] The extrusion chamber 200 includes a heating module 201 disposed in the interlayer of the chamber wall. The heat from the heating module 201 is directly conducted to the melting zone 202 inside the chamber wall. In order to effectively limit the melting of the material, the inlet and outlet of the melting zone 202 have a conical constriction structure. The interior of the extrusion chamber 200 is provided with a second rotating shaft 203 and a second auger 205 sleeved on it. The second rotating shaft 203 is defined as being arranged laterally by a bearing seat 209. One side of the second rotating shaft 203 extends to the outside of the extrusion chamber 200 and is sleeved with a first bevel gear 204. The first bevel gear 204 meshes with a second bevel gear 206 on a third rotating shaft 207. The third rotating shaft 207 is connected to the output shaft of a second motor 208 and is arranged perpendicular to the second rotating shaft 203.

[0035] The inner side of the second rotating shaft 203 is hollow and a sleeve 210 is installed inside. The sleeve 210 does not rotate with the second rotating shaft 203. A condensate pipe 211 is embedded in the cavity of the sleeve 210. The condensate pipe 211 is arranged in a U-shape or S-shape inside the sleeve 210. The temperature of the condensate pipe 211 is indirectly transmitted to the second rotating shaft 203 through the sleeve 210.

[0036] The pumping assembly 300 includes an upper pipe 301, a lower pipe 303 extending downward from the middle of the upper pipe 301, and a pumping needle 302 at the bottom of the lower pipe 303. During assembly, the pumping needle 302 is obliquely positioned inside the extrusion chamber 200. A front channel 304 and a rear channel 305 are formed inside the lower pipe 303. The front channel 304 is connected to the flow channel inside the pumping needle 302. The channel diameter of the front channel 304 is smaller than that of the rear channel 305. A piston head 306 is built into the rear channel 305. The piston head 306 is connected to a pull rod 307 that passes through the lower pipe 303. A wristband 308 is provided at the top of the pull rod 307 on the outward side. A water outlet pipe 309 is perpendicular to the upper pipe 301 and extends outward. One side of the water outlet pipe 309 is connected to the rear channel 305, and the other side of the water outlet pipe 309 is provided with a switch valve 310.

[0037] Working principle: When this utility model is in use, the material enters from the opening at the top of the primary feeding cylinder. Driven by the first motor, the dispersing rod on the first rotating shaft rotates at high speed. The inclined connecting rod body knocks the lumpy material against the cylinder wall to break it up. At the same time, the normal material is stirred and conveyed downward to prevent blockage. When the material descends to the vertical part, it is compacted and conveyed by the first auger on the first rotating shaft. The material then falls evenly into the front end of the extrusion chamber.

[0038] When the material is fed into the extrusion chamber, the second auger on the second rotating shaft in the extrusion chamber drives the material to continue moving forward. The material is plasticized in the melting zone of the extrusion chamber. It should be noted that the heat in the melting zone comes directly from the heating module, which consists of flatly laid heating wires. The temperature of the melting zone is the temperature of heat transfer. This heat transfer method is existing technology. After heat transfer, the temperature of the melting zone reaches 180-230℃, which facilitates effective thermal melting. When it is necessary to replenish the material or add other materials, the material can be fed through the secondary feeding structure. It should be noted that the specifications of the secondary feeding structure are the same as those of the primary feeding structure, and their feeding methods are also the same.

[0039] During use, the water pumping component is inserted into the extrusion chamber at an angle and eventually reaches the surface of the melt. By manually pulling the piston head, a negative pressure is created in the rear channel. Free water penetrates the micropores of the water pumping needle → the front channel → the rear channel → and is discharged from the outlet pipe after the switch valve is opened, reducing the water content inside the extrusion chamber.

[0040] During the feeding process, the condensate in the condensate pipe circulates in the sleeve inside the second rotating shaft, suppressing the accumulation of frictional heat.

[0041] The secondary feeding structure injects a modifier (such as a coupling agent) into the middle of the melting zones on both sides. The melt is sheared and mixed by the second auger, which can achieve nanoscale dispersion.

[0042] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An extrusion device for producing a modified master batch, characterized by: It includes a primary feeding structure (100), an extrusion chamber (200), a pumping assembly (300), and a secondary feeding structure (400); The primary feeding structure (100) includes a funnel-shaped feeding cylinder (101), and the discharge port of the feeding cylinder (101) is located at the feeding front end of the extrusion chamber (200). The extrusion chamber (200) includes a heating module (201) disposed in the interlayer of the chamber wall. The heat of the heating module (201) is directly conducted to the melting zone (202) inside the chamber wall. The interior of the extrusion chamber (200) is provided with a second rotating shaft (203) and a second auger (205) sleeved thereon. The second rotating shaft (203) is defined as being arranged laterally by a bearing seat (209). One side of the second rotating shaft (203) extends to the outside of the extrusion chamber (200) and is sleeved with a first bevel gear (204). The first bevel gear (204) meshes with the second bevel gear (206) on the third rotating shaft (207) for transmission. The third rotating shaft (207) is connected to the output shaft of the second motor (208). The inner side of the second rotating shaft (203) is hollow and a sleeve (210) is installed inside. The sleeve (210) does not rotate with the second rotating shaft (203). A condensate pipe (211) is embedded in the cavity of the sleeve (210). The pumping assembly (300) includes an upper tube (301), and a lower tube (303) extends downward from the middle of the upper tube (301). A pumping needle (302) is provided at the bottom of the lower tube (303). During assembly, the pumping needle (302) is obliquely positioned inside the extrusion chamber (200). A front end channel (304) and a rear end channel (305) are provided inside the lower tube (303). The front end channel (304) and the flow channel inside the pumping needle (302) are connected. The front channel (304) has a smaller channel diameter than the rear channel (305). The rear channel (305) has a built-in piston head (306). The piston head (306) is connected to a pull rod (307) that passes through the lower tube (303). The water outlet pipe (309) is perpendicular to the upper tube (301) and extends outward. One side of the water outlet pipe (309) is connected to the rear channel (305), and the other side of the water outlet pipe (309) is provided with a switch valve (310).

2. The extrusion device for producing a modified master batch according to claim 1, characterized in that: The top of the feeding cylinder (101) is provided with a feeding opening. The middle part of the feeding cylinder (101) is provided with a first motor (102). The first motor (102) drives the first rotating shaft (103) to rotate. Several sets of connecting rods (104) are installed on the first rotating shaft (103). The ends of the several sets of connecting rods (104) are connected to an inclined dispersing rod (105). The dispersing rod (105) is parallel to the side wall of the feeding cylinder (101). The bottom of the first rotating shaft (103) is connected to a first auger (106). The first auger (106) is vertically arranged.

3. The extrusion device for producing a modified master batch according to claim 2, characterized in that: The secondary feeding structure (400) has the same structural specifications as the primary feeding structure (100). Both the primary feeding structure (100) and the secondary feeding structure (400) are provided with limiting plates (107) on their outer sides for positioning and limiting. The secondary feeding structure (400) is located in the middle of the travel direction of the extrusion chamber (200).

4. The extrusion device for producing a modified master batch according to claim 1, characterized in that: The second motor (208) is mounted on a bracket outside the extrusion chamber (200).

5. The extrusion device for producing a modified master batch according to claim 1, characterized in that: The third rotation axis (207) is arranged perpendicular to the second rotation axis (203).

6. The extrusion device for producing a modified master batch according to claim 1, characterized in that: The condensate pipe (211) is arranged in a U-shape or S-shape inside the sleeve (210), and the temperature of the condensate pipe (211) is indirectly transmitted to the second rotating shaft (203) through the sleeve (210).

7. The extrusion device for producing a modified master batch according to claim 1, characterized in that: A wristband (308) is provided at the top of the pull rod (307) on the outward side.

8. The extrusion device for producing a modified master batch according to claim 1, characterized in that: The inlet and outlet of the molten zone (202) have a conical narrowing structure.

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