Twin-screw extruder for producing flame-retardant PVC decorative film

Abstract

The utility model relates to the technical field of double-screw extruders, and discloses a double-screw extruder for producing a flame-retardant PVC (polyvinyl chloride) decorative film, which comprises a bottom plate, an extruder fixedly mounted on the upper part of the bottom plate, a workbench fixedly mounted on the upper part of the bottom plate, a mounting plate fixedly mounted on the upper part of the workbench, and a mounting frame fixedly mounted on the upper part of the left side of the mounting plate, a charging barrel is fixedly mounted on the upper portion of the mounting frame, the lower portion of the charging barrel communicates with a discharging port, the lower portion of the discharging port is connected with a discharging control box, the lower portion of the discharging control box communicates with a feeding port, a mounting groove is formed in the discharging control box, and a baffle is slidably mounted on the inner wall of the mounting groove. A fixed plate is fixedly mounted at the upper part of the charging barrel. Through the arrangement of the charging barrel, the discharging opening, the discharging control box, the mounting groove, the feeding opening, the baffle, the hydraulic rod, the fixing plate, the motor, the stirring rod and the packing auger, the effects that the feeding amount can be controlled, too many or too few materials are avoided, and extruded materials are improved are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of twin-screw extruders, in particular to a twin-screw extruder for producing flame-retardant PVC decorative films. Background Art

[0002] The main component of PVC film is polyvinyl chloride, which is slightly yellow and translucent and shiny. The transparency is better than polyethylene and polypropylene, but worse than polystyrene. Depending on the amount of additives used, it is divided into soft and hard polyvinyl chloride. Soft products are soft and tough, and feel sticky. The hardness of hard products is higher than low-density polyethylene, but lower than polypropylene, and whitening will occur at the bends. Common products: plates, pipes, soles, toys, doors and windows, wire sheaths, stationery, etc. The production of flame-retardant PVC decorative film requires the use of twin-screw extruders.

[0003] In the existing published patents: conical twin-screw extruder (publication number: conical twin-screw extruder) "includes a machine base, the upper end of the machine base is fixedly connected to a support base, the upper end of the support base is fixedly connected to a metal sleeve, the outer side of the metal sleeve is provided with a heating component for rapid heating, the upper end of the machine base is fixedly connected to a protective cover, the inner side of the protective cover is provided with a cooling component for rapid cooling, the upper end of the metal sleeve is fixedly connected to a feed port, the upper end of the feed port is fixedly connected to a feed barrel, and a feeding component is provided on the outer side of the feed barrel. The conical twin-screw extruder is provided with a spiral groove on the surface of the metal sleeve to make the screw The spiral heating tube can be embedded in the metal casing, and the contact area is increased, so that the temperature inside the metal casing rises more quickly. Since multiple groups of spiral heating tubes are connected in parallel, the temperature of the segmented area can be controlled by the temperature control knob connected to the power bar, so that the plastic particles are at a suitable temperature, and the characteristics of the mixed plastic particles are improved. However, there are still certain defects in the use process. The range of the feed port cannot be adjusted, resulting in the inability to control the material feeding amount, which may lead to too much or too little material feeding, which will affect the extrusion effect. For this reason, a twin-screw extruder for the production of flame-retardant PVC decorative film is proposed. Utility Model Content

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies in the prior art, the utility model provides a twin-screw extruder for producing flame-retardant PVC decorative film, which has the advantages of being able to control the feeding amount, avoid excessive or insufficient material, and improve the effect of extruding the material, thereby solving the problems raised in the above-mentioned background technology.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the following technical scheme is provided: a twin-screw extruder for the production of flame-retardant PVC decorative film, comprising a base plate, an extruder is fixedly installed on the upper part of the base plate, a workbench is fixedly installed on the upper part of the base plate, a mounting plate is fixedly installed on the upper part of the workbench, a mounting frame is fixedly installed on the upper left part of the mounting plate, a barrel is fixedly installed on the upper part of the mounting frame, a discharge port is connected to the lower part of the barrel, a discharge control box is connected to the lower part of the discharge control box, a feed port is connected to the lower part of the discharge control box, a mounting groove is opened inside the discharge control box, a baffle is slidably installed on the inner wall of the mounting groove, a hydraulic rod is fixedly installed on the upper left part of the mounting plate, and a fixing plate is fixedly installed on the upper part of the barrel.

[0008] Preferably, a motor is fixedly mounted on the upper part of the fixed plate, a stirring rod is movably mounted on the lower part of the fixed plate, an auger is fixedly mounted on the lower end of the stirring rod, the output end of the motor is fixedly connected to the upper end of the stirring rod, and the auger is located inside the discharge port.

[0009] Preferably, the telescopic end of the hydraulic rod is fixedly connected to the outer side of the baffle, and the hydraulic rod and the baffle are symmetrically arranged with the discharge port as the center. The baffle can isolate the discharge port from the feed port, and the lower end of the feed port is connected to the inside of the extruder.

[0010] Preferably, a filter box is fixedly mounted on the upper portion of the bottom plate, an exhaust fan is mounted on the outer side of the filter box, a suction port of the exhaust fan is connected to the inside of the filter box, and an air suction port is opened at the lower portion of the fixed plate.

[0011] Preferably, a connecting pipe is connected to the upper portion of the filter box, and the upper end of the connecting pipe is communicated with the air suction port.

[0012] Preferably, a movable door is hingedly mounted on the front side of the fixed plate.

[0013] Preferably, a heating device is provided on the outside of the barrel.

[0014] (III) Beneficial effects

[0015] Compared with the prior art, the utility model provides a twin-screw extruder for producing flame-retardant PVC decorative film, which has the following beneficial effects:

[0016] 1. The twin-screw extruder for the production of flame-retardant PVC decorative film can control the feeding amount through the setting of barrel, discharge port, discharge control box, installation slot, feed port, baffle, hydraulic rod, fixing plate, motor, stirring rod and auger, so as to avoid too much or too little material and improve the effect of extrusion.

[0017] 2. The twin-screw extruder for the production of flame-retardant PVC decorative film can avoid the diffusion of harmful gases, protect the health of workers and provide environmental protection of the equipment through the setting of filter boxes, exhaust fans, connecting pipes and exhaust ports. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0019] Figure 2 This is a cross-sectional schematic diagram of the barrel and related structures of the utility model;

[0020] Figure 3 It is a schematic diagram of the back structure of the utility model.

[0021] In the figure: 1. bottom plate; 2. extruder; 3. workbench; 4. mounting plate; 5. mounting frame; 6. barrel; 7. discharge port; 8. discharge control box; 9. mounting slot; 10. feed port; 11. baffle; 12. hydraulic rod; 13. fixing plate; 14. motor; 15. stirring rod; 16. auger; 17. filter box; 18. exhaust fan; 19. connecting pipe; 20. exhaust port; 21. heating device. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments, not all of the embodiments. Based on the embodiments in the embodiments, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection.

[0023] Embodiment 1:

[0024] See also Figure 1-3 A twin-screw extruder for producing flame-retardant PVC decorative film comprises a bottom plate 1, an extruder 2 is fixedly mounted on the upper part of the bottom plate 1, a workbench 3 is fixedly mounted on the upper part of the bottom plate 1, a mounting plate 4 is fixedly mounted on the upper part of the workbench 3, a mounting frame 5 is fixedly mounted on the upper left part of the mounting plate 4, a barrel 6 is fixedly mounted on the upper part of the mounting frame 5, a discharge port 7 is connected to the lower part of the barrel 6, a discharge port 7 is connected to a discharge control box 8 at the lower part of the discharge control box 8, a feed port 10 is connected to the lower part of the discharge control box 8, a mounting groove 9 is provided inside the discharge control box 8, a baffle 11 is slidably mounted on the inner wall of the mounting groove 9, a hydraulic rod 12 is fixedly mounted on the upper left part of the mounting plate 4, and a fixing plate 13 is fixedly mounted on the upper part of the barrel 6.

[0025] Specifically, the materials are put into the feed barrel 6. In the initial stage, the partitions on both sides are closed together. When the materials are discharged, the hydraulic rod 12 moves the baffle 11 to both sides. The baffle 11 slides along the mounting groove 9, so that the outlet 7 and the feed port 10 are opened, and then the materials in the barrel 6 will enter the extruder 2.

[0026] Preferably, a motor 14 is fixedly installed on the upper part of the fixed plate 13, a stirring rod 15 is movably installed on the lower part of the fixed plate 13, an auger 16 is fixedly installed on the lower end of the stirring rod 15, the output end of the motor 14 is fixedly connected to the upper end of the stirring rod 15, and the auger 16 is located inside the discharge port 7.

[0027] Specifically, the motor 14 can drive the stirring rod 15 to rotate, and the stirring rod 15 can stir the material in the barrel 6. At the same time, the stirring rod 15 can drive the auger 16 to rotate, and the rotation of the auger 16 can drive the material to move downward, so that the material can quickly fall into the feed port 10.

[0028] Preferably, the telescopic end of the hydraulic rod 12 is fixedly connected to the outer side of the baffle 11, and the hydraulic rod 12 and the baffle 11 are symmetrically arranged with the discharge port 7 as the center. The baffle 11 can isolate the discharge port 7 from the feed port 10, and the lower end of the feed port 10 is connected to the inside of the extruder 2.

[0029] Specifically, by adjusting the moving distance of the baffle 11, the size of the connection between the discharge port 7 and the feed port 10 can be controlled, thereby controlling whether the material drops more or less. If the opening is small, the amount of material dropping will be smaller, and if the opening is larger, the amount of material dropping will be larger.

[0030] Preferably, a heating device 21 is provided on the outside of the barrel 6 .

[0031] Specifically, the heating device 21 can heat the material inside the barrel 6 .

[0032] Working principle: the materials are loaded into the barrel 6 in advance, and then the heating device 21 is turned on to heat the materials in the barrel 6. At the same time, the motor 14 drives the stirring rod 15 to rotate, and the stirring rod 15 will stir the materials in the barrel 6 to achieve the effect of preheating the materials. When unloading, the hydraulic rod 12 moves the baffle 11, and the baffle 11 slides in the opposite direction in the mounting groove 9 to open the connection between the feed port 10 and the discharge port 7. At the same time, the motor 14 continues to rotate with stirring, and the stirring rod 15 will rotate with the auger 16, which is located in the discharge port 7. The auger 16 can move the materials downward quickly, and the materials can quickly enter the extruder. By adjusting the moving distance of the baffle 11, the size of the connection between the discharge port 7 and the feed port 10 can be controlled, thereby controlling the feed amount, thereby achieving the effect of preheating the materials and avoiding moisture in the materials. At the same time, the unloading amount can be controlled to avoid excessive or insufficient unloading, resulting in no extrusion of the feeding, affecting the effect of extrusion unloading.

[0033] Embodiment 2:

[0034] See also Figure 1-3A filter box 17 is fixedly installed on the upper part of the bottom plate 1, and an exhaust fan 18 is installed on the outer side of the filter box 17. The suction port of the exhaust fan 18 is connected to the inside of the filter box 17, and an exhaust port 20 is opened at the lower part of the fixed plate 13.

[0035] Specifically, activated carbon is disposed in the filter box 17 to filter harmful gas.

[0036] Preferably, a connecting pipe 19 is connected to the upper portion of the filter box 17 , and the upper end of the connecting pipe 19 is communicated with the air suction port 20 .

[0037] Preferably, a movable door is hingedly installed on the front side of the fixed plate 13 .

[0038] Working principle: close the movable door and start heating. Some odors generated during heating can be removed by the vacuum pump to generate strong suction. The connecting pipe 19 is connected to the vacuum port 20. The vacuum port 20 can extract the odor in the barrel 6 and enter the filter. The activated carbon in the filter can filter harmful substances in the gas, thereby avoiding the spread of harmful gases, protecting the health of workers, and improving the environmental protection of the equipment.

[0039] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit thereof, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A twin-screw extruder for producing flame-retardant PVC decorative film, comprising a bottom plate (1), characterized in that: An extruder (2) is fixedly mounted on the upper part of the base plate (1), a workbench (3) is fixedly mounted on the upper part of the base plate (1), a mounting plate (4) is fixedly mounted on the upper part of the workbench (3), a mounting frame (5) is fixedly mounted on the upper left part of the mounting plate (4), a barrel (6) is fixedly mounted on the upper part of the mounting frame (5), a discharge port (7) is connected to the lower part of the barrel (6), a discharge port (7) is connected to the lower part of the discharge port (7), a discharge control box (8) is connected to the lower part of the discharge control box (8), a feed port (10) is connected to the lower part of the discharge control box (8), a mounting groove (9) is provided inside the discharge control box (8), a baffle (11) is slidably mounted on the inner wall of the mounting groove (9), a hydraulic rod (12) is fixedly mounted on the upper left part of the mounting plate (4), and a fixing plate (13) is fixedly mounted on the upper part of the barrel (6).

2. The twin-screw extruder for producing flame-retardant PVC decorative film according to claim 1, characterized in that: A motor (14) is fixedly mounted on the upper part of the fixed plate (13), a stirring rod (15) is movably mounted on the lower part of the fixed plate (13), an auger (16) is fixedly mounted on the lower end of the stirring rod (15), an output end of the motor (14) is fixedly connected to the upper end of the stirring rod (15), and the auger (16) is located inside the discharge port (7).

3. The twin-screw extruder for producing flame-retardant PVC decorative film according to claim 1, characterized in that: The telescopic end of the hydraulic rod (12) is fixedly connected to the outer side of the baffle (11); the hydraulic rod (12) and the baffle (11) are symmetrically arranged with the discharge port (7) as the center; the baffle (11) can isolate the discharge port (7) from the feed port (10); and the lower end of the feed port (10) is connected to the inside of the extruder (2).

4. The twin-screw extruder for producing flame-retardant PVC decorative film according to claim 1, characterized in that: A filter box (17) is fixedly mounted on the upper portion of the bottom plate (1), an exhaust fan (18) is mounted on the outer side of the filter box (17), a suction port of the exhaust fan (18) is connected to the interior of the filter box (17), and an air suction port (20) is opened at the lower portion of the fixed plate (13).

5. The twin-screw extruder for producing flame-retardant PVC decorative film according to claim 4, characterized in that: The upper part of the filter box (17) is connected to a connecting pipe (19), and the upper end of the connecting pipe (19) is in communication with an air suction port (20).

6. The twin-screw extruder for producing flame-retardant PVC decorative film according to claim 1, characterized in that: The front side of the fixed plate (13) is hingedly provided with a movable door.

7. The twin-screw extruder for producing flame-retardant PVC decorative film according to claim 1, characterized in that: A heating device is arranged on the outer side of the barrel (6).

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