CN207028136U - A kind of Planetary Screw Extruder of processing PVC material - Google Patents

Abstract

A planetary screw extruder for processing PVC materials, including a control part, a driving part, a feeding part, a main machine part and a machine head part, the main motor is connected to a reducer through a belt drive, the reducer is connected to the main shaft through a coupling, and the hopper The upper part and the lower part are connected by positioning pins. The arch breaking device is located in the lower part of the hopper. The material enters the conveying section from the barrel at the feeding place, and the screw in the conveying section gradually transports the material to the melting section of the single screw part. The conveying section and the melting section The pitch of the section gradually becomes smaller, and the inner sleeve of the melting section is equipped with an electric heating device. After the material becomes molten, it enters the planetary section. The main screw rotates, and the six planetary screws are also revolving at the same time, and the material is plasticized and mixed. . The material finally enters the die of the machine head to form the desired product shape. The utility model has the advantages of simple structure, high plasticizing efficiency, large heat exchange area, good self-cleaning effect, no dead spots in the flow channel, no decomposition of materials due to retention, low energy consumption and high output.

Description

A planetary screw extruder for processing PVC materials

technical field

The utility model belongs to the technical field of plastic molding processing, in particular to a planetary screw extruder for processing PVC materials.

Background technique

At present, PVC (polyvinyl chloride) materials have been widely used in daily life. Compared with metal materials, wood and ceramic materials, PVC materials have incomparable advantages. For example, compared with metal materials, their chemical stability is high. , It is not easy to corrode, so it can be made into anti-corrosion pipelines, oil pipelines and other places that are not easy to make with metal. Its electrical insulation performance is good, and some PVC products are relatively soft, which can be used to make cables and sockets. The main processing method of PVC products is to produce PVC products through processes such as plasticizing, mixing, and final molding of resin and other raw materials through an extruder. The most widely used are single and twin-screw extruders, but the biggest disadvantage of this type of extruder is low efficiency and insufficient plasticizing and mixing effects. Therefore, in order to improve production efficiency and improve plasticizing and mixing effects, it is necessary to The existing extruder is improved, therefore, there is the idea of a planetary screw extruder.

Utility model content

The purpose of the utility model is to provide a planetary screw extruder for processing PVC materials, which solves the problems of low efficiency and insufficient plasticizing and mixing effects of traditional extruders.

The technical scheme adopted by the utility model is: including the control part, the driving part, the feeding part, the main engine part and the machine head part, the main motor is connected with the reducer through the belt drive, the reducer is connected with the main shaft through the shaft coupling, and the upper part of the hopper is connected with the main shaft. The lower part is connected by positioning pins, and the arch breaking device is located at the lower part of the hopper. The material enters the conveying section from the barrel at the feeding place, and the screw in the conveying section gradually transports the material to the melting section of the single screw part. The screw pitch between the conveying section and the melting section It gradually becomes smaller, and the inner sleeve of the melting section is equipped with an electric heating device. After the material becomes molten, it enters the planetary section. The main screw rotates, and at the same time, the six planetary screws are also revolving. The material finally enters the die of the machine head to form the desired product shape.

The utility model has the advantages of simple structure, high plasticizing efficiency, large heat exchange area, good self-cleaning effect, no dead spots in the flow channel, no decomposition of materials due to retention, low energy consumption, and high output.

As a further improvement of the utility model, the upper part of the hopper adopts a rectangular hopper, and the lower part adopts a hexahedron hopper with a wide top and a narrow bottom, and a hopper cover is installed on the top of the hopper with an arch breaking device to prevent dust and other sundries There is also a mirror hole in the rectangular part of the hopper, which can observe the storage and feeding of materials in time.

As a further improvement of the utility model, the host part has a temperature control system, which is composed of two parts, one part is the screw water cooling circulation system in the feeding section, and the other part is the barrel electric heating wire heating system, through the two parts Work together to ensure that the planetary extruder has good temperature control performance.

As a further improvement of the utility model, the planetary section adopts the idea of combining planetary gears and extruder screws. Due to the planetary screw structure, the number of screws in this part is large, so its plasticizing and mixing effects will be improved. It is greatly improved, and because of its unique structure, the heat exchange area between the extruder screw and the internal material is greatly increased, which is conducive to the control of the internal temperature of the barrel to ensure that excellent quality PVC products can be obtained.

As a further improvement of the utility model, the partial capacity of the planetary screw and the partial capacity of the single screw have a good match, which effectively improves the extrusion efficiency and avoids a backlog of materials.

Description of drawings:

Fig. 1 is the overall structural representation of the utility model

Fig. 2 is the schematic diagram of the utility model hopper structure

Fig. 3 is a structural schematic diagram of the host part of the present utility model

Explanation of reference signs:

1 control box, 2 frame, 3 machine head part, 4 main engine part, 5 feeding part, 6 bolts, 7 control center, 8 control center support, 9 reducer, 10 belt drive, 11 main motor, 12 hopper lower part, 13 positioning pin, 14 upper part of hopper, 15 mirror hole, 16 bin cover, 17 upper material level gauge, 18 lower material level gauge, 19 arch breaking device, 20 bearing base, 21 feeding barrel, 22 connection Bolt, 23 single screw part outer barrel, 24 main screw, 25 planetary segment outer barrel, 26 planetary screw inner sleeve, 27 planetary screw part, 28 single screw inner sleeve, 29 single screw part, 30 angular contact bearing, 31 set nut, 32 bearing end cover

detailed description:

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

The technical scheme that the utility model adopts is: comprise control part, driving part, feeding part 5, main engine part 4 and machine head part 3, main motor 11 is connected with speed reducer 9 through belt transmission 10, speed reducer 9 is connected with speed reducer 9 through shaft coupling The main shaft is connected, the upper part 14 of the hopper is connected with the lower part 12 of the hopper through the positioning pin 7, and the arch breaking device 19 is located at the lower part 12 of the hopper, the material enters the conveying section from the barrel 21 at the feeding place, and the screw in the conveying section gradually transports the material to In the melting section of the single-screw part 29, the screw pitch between the conveying section and the melting section becomes smaller gradually. The inner sleeve of the melting section is equipped with an electric heating device, and the material enters the planetary section after it becomes molten. The planetary screw part 27 is also revolving, and the materials are plasticized and mixed. The material finally enters the 3 dies of the head part to form the desired product shape.

In the process of processing, various process conditions should be reasonably controlled, such as temperature control, screw cooling, screw speed, sizing pressure and vacuum degree, traction rate, etc. Make each process condition adapt to what is needed in the PVC processing process.

As for the hopper part, the upper part and the lower part of the hopper are connected by positioning pins.

The main engine part is installed on the base 20 of the bearing, and is fixed with an angular contact bearing 30 through a set nut 31 and a bearing end cover 32 .

The rotational speed of the multi-screw extruder is generally 15-30 r/min.

Claims (4)

1. a kind of Planetary Screw Extruder of processing PVC material, including control section (1), drive part, feeding section (5), master Machine part (4) and head section (3), main motor (11) are connected by V belt translation (10) with decelerator (9), and decelerator (9) passes through Shaft coupling is connected with main shaft, and hopper upper part (14) is connected with hopper lower part (12) by alignment pin (7), wherein arch breaking apparatus (19) be located at hopper lower part (12), material enters transportation section by charging machine barrel (21), transportation section half of screw by material by Gradually transport the melt zone of single screw rod part (29), the pitch of transportation section and melt zone tapers into, on melt zone inner sleeve Provided with electric heater unit, material enters among planet section after being changed into molten condition, driving screw (24) rotation, while six roots of sensation planet spiral shell Bar part (27) is also being revolved round the sun, and material is plastified, is kneaded, needed for material is finally entered and formed among head section (3) mouth mold Shape of product.

A kind of 2. Planetary Screw Extruder of processing PVC material according to claim 1, it is characterised in that described material Bucket upper part (14) uses rectangle hopper, and lower part uses hexahedron hopper wide at the top and narrow at the bottom, and carries arch breaking apparatus (19), Hopper cover is installed at the top of hopper, and visor hole (15) is also provided with the rectangle part of hopper.

A kind of 3. Planetary Screw Extruder of processing PVC material according to claim 1, it is characterised in that described master Machine part has temperature control system, and it is made up of two parts, and a part is the screw rod water-cooling circulating system of feeding section, another part It is machine barrel electric-heating-wire-heating system, by this two-part common cooperation, ensures that planetary extruder has good temperature-control performance.

A kind of 4. Planetary Screw Extruder of processing PVC material according to claim 1, it is characterised in that described row Starshell bar part (27) capacity and single screw rod part (29) capacity have good matching.