CN205310740U

CN205310740U - Double screw extruder feed arrangement

Info

Publication number: CN205310740U
Application number: CN201521045992.6U
Authority: CN
Inventors: 李鑫
Original assignee: North China Institute of Aerospace Engineering
Current assignee: North China Institute of Aerospace Engineering
Priority date: 2015-12-15
Filing date: 2015-12-15
Publication date: 2016-06-15
Anticipated expiration: 2025-12-15

Abstract

The utility model provides a double screw extruder feed arrangement, including hopper, top cap, feed cylinder, drive machine, filter screen device and the inlet pipe more than, filter screen device sets up on the top cap, the top cap articulates the hopper upper end, the lower extreme of hopper is fixed on the feed cylinder, just the lower extreme of hopper with the feed cylinder is linked together, filter screen device is including holding groove, lid and filter screen, the filter screen sets up hold the inslot, the lid can be opened or the lid fits hold on the groove, filter equipment with the hopper is linked together, inlet pipe more than one is fixed on the lid, and inlet pipe more than one all with filter equipment is linked together, drive machine with feed cylinder fixed connection, drive machine's screw rod stretches into in the feed cylinder. The device provided by the utility model safe and reliable, the raw materials quality can be effectively ensured, product quality is improved.

Description

A kind of twin screw extruder feeding unit

Technical field

The utility model belongs to device of plastic processing technical field, is specifically related to a kind of twin screw extruder feeding unit.

Background technology

Extruding-out process have productivity height, strong adaptability, purposes extensively, the feature such as output proportion is big, be in polymer processing field production kind at most, change the abundantest, one of method for processing forming. Extruding-out process makes high polymer molten (or viscous fluid) by the mouth mold forming of a shaped under the extrusion shearing effect of extruder screw, and goods are the continuous section bar with constant section form.

Extruding-out process is suitable for major part macromolecular material. Almost can shaping all thermoplasticss, it is possible to for thermosetting resin, but be only limitted to a few thermosetting resines such as phenolic aldehyde. Moulded products contains tubing, sheet material, bar, sheet material, film, monofilament, cable coating layer, various profiled material and matrix material etc. In existing market, the thermoplastic articles of about 50% is processed by extrusion moulding. In addition expressing technique is also usually used in painted, mixing, the plasticizing of plastics, the blending and modifying etc. of granulation and plastics, based on extrusion moulding, coordinate technology such as blowing swollen, stretching, develop into again extrusion and blow molding and extrude tentering forming technique, the goods such as hollow blow molding and biaxially oriented film can be produced. Visible extruding-out process is one of method the most important in forming polymer.

Extrusion equipment comprises the big class of screw-type extruder and plunger-type extruder two, and the former extrudes for continous way, and the latter extrudes for intermittent type, is mainly used in full-bodied material forming, such as tetrafluoroethylene, ultrahigh molecular weight polyethylene(UHMWPE) etc. Screw extrusion press can be divided into single screw extrusion machine and multiple screw extruder. Single screw extrusion machine is forcing machine the most basic on producing. In multiple screw extruder, twin screw extruder development in recent years is the fastest, and its application is day by day extensive. At present, in the processing of PVC plastic steel window and door sectional material, twin screw extruder has become main production unit, and single screw extrusion machine will progressively be eliminated.But extruding in processing at other polymkeric substance, single screw extrusion machine is still occupied an leading position.

But there is following shortcoming in the charging mechanism in current existing twin screw extruder:

1) loading hopper of, current twin screw extruder is unlimited, material in hopper directly contacts with moisture with the oxygen in air in the course of processing, the performance preparing the modified plastics to the oxygen in air and moisture-sensitive, then directly can be produced directly impact through dried material (such as PET) and mixed modifier components by some;

2), not having impurity treatment device in existing feeding unit, impurity enters in hopper with raw material, production is had an impact;

3), in existing feeding unit, raw material easily sticks on hopper inwall, and the barrel that cannot fall into twin screw extruder fully is extruded, and causes wastage of material.

4), production environment can be polluted by the dust of material.

Practical novel content

In view of this, the purpose of this utility model is to overcome the deficiencies in the prior art, it is provided that a kind of safe and reliable, the twin screw extruder feeding unit that can effectively ensure product quality.

For achieving the above object, the utility model takes following technical scheme: a kind of twin screw extruder feeding unit, comprises the feed-pipe of hopper, top cover, barrel, driving motor, filter screen device and more than; Described filter screen device is arranged on described top cover; Described top cover is hinged on described hopper upper end; The lower end of described hopper is fixed on described barrel, and the lower end of described hopper is connected with described barrel; Described filter screen device comprises tank, lid body and filtering net, and described filtering net is arranged in described tank, and described lid body can be opened or be covered on described tank; Described filtration unit is connected with described hopper; The feed-pipe of more than one is fixed on described lid body, and the feed-pipe of more than is all connected with described filtration unit; Described driving motor is fixedly connected with described barrel, and the screw rod of described driving motor extend in described barrel.

Described feeding unit also comprise control circuit board and be electrically connected with described control circuit board the first temperature sensor, the 2nd temperature sensor and LED display; Described control circuit board, described first temperature sensor and described LED display are arranged on described hopper outer wall, and described 2nd temperature sensor is arranged on described barrel.

Being connected by communicating pipe between the lower end of described hopper and described barrel, described communicating pipe is provided with stopping valve. Described feeding unit also comprises heating unit, and described heating unit is arranged on the periphery of described barrel.

Described feeding unit also comprises refrigerating unit, and described refrigerating unit is arranged on the periphery of described barrel. Described feeding unit also comprises glass window, and described glass window is arranged on described hopper outer wall side.

Each feed-pipe all arranges stopping valve. Described feeding unit also comprises vibrator, and described vibrator is arranged on described hopper outer wall.

The utility model adopts as above technical scheme, is provided with filtration unit on described top cover, can be blocked by the silk in raw material bag and not fall into hopper, thus ensure the quality of raw material; The top cover arranged, makes raw material be in a relatively airtight space, avoids dust to the oxygen in the pollution of production environment and air and moisture to the impact of the performance of material; The supply that many feed-pipes have effectively ensured raw material is set, conveniently adds plurality of raw materials simultaneously.Compared with prior art, the equipment safety that the utility model provides is reliable, can effectively ensure material quality, it is to increase quality product.

Accompanying drawing explanation

Fig. 1 is a kind of twin screw extruder feeding unit structural representation of the utility model.

In figure: 1, hopper; 2, top cover; 3, barrel; 4, driving motor; 5, filter screen device; 51, tank; 52, Gai Ti; 53, filtering net; 6, feed-pipe; 7, control circuit board; 8, the first temperature sensor; 9, the 2nd temperature sensor; 10, LED display; 11, stopping valve; 12, glass window; 13, vibrator; 14, handle.

Embodiment

Below in conjunction with drawings and Examples, the utility model is described in detail.

As shown in Figure 1, the present embodiment provides a kind of twin screw extruder feeding unit, comprises the feed-pipe 6 of hopper 1, top cover 2, barrel 3, driving motor 4, filter screen device 5 and more than; Described filter screen device 5 is arranged on described top cover 2; Described top cover 2 is hinged on described hopper 1 upper end; The lower end of described hopper 1 is fixed on described barrel 3, and the lower end of described hopper 1 is connected with described barrel 3; Described filter screen device 5 comprises tank 51, lid body 52 and filtering net 53, and described filtering net arranges 5 in described tank 51, and described lid body 52 can be opened or be covered on described tank 51; Described filtration unit 5 is connected with described hopper 1; The feed-pipe 6 of more than one is fixed on described lid body 51, and the feed-pipe 6 of more than is all connected with described filtration unit 5; Described driving motor 4 is fixedly connected with described barrel 3, and the screw rod of described driving motor 4 extend in described barrel 3.

As a kind of optimal way, the first temperature sensor 8, the 2nd temperature sensor 9 and LED display 10 that described feeding unit also comprises control circuit board 7 and is electrically connected with described control circuit board 7; Described control circuit board 7, described first temperature sensor 8 and described LED display 10 are arranged on described hopper 1 outer wall, and described 2nd temperature sensor 9 is arranged on described barrel 3.

As a kind of optimal way, being connected by communicating pipe between described hopper 1 time end and described barrel 3, described communicating pipe is provided with stopping valve 11.

The present embodiment is provided with heating unit (not shown) and refrigerating unit (not shown) in the outside of barrel 3. Heating general point three to four sections, conventional resistance or inductive heater, also have and to adopt FAR INFRARED HEATING. Plastics must be cooled in order to avoid the degraded of plastics when being and prevent the overheated of plastics or stop by the object of cooling fast. Cooling is generally by air-cooled or water-cooled. Barrel 3 must bear high pressure, it is desired to has enough strength and stiffness, inner wall smooth. Barrel 3 generally makes plastics overheated with rotten plastic friction wear-resisting, resistance to, allows screw surface temperature a little less than barrel 3 simultaneously, prevents material sticks on it, is beneficial to the conveying of material. The screw rod thrust bearing of driving motor 4 hangs and props up the central authorities at barrel 3, coincide with barrel 3 medullary ray, it should not have obvious deviation. The gap of screw rod and barrel 3 is very little, makes plastics be subject to powerful shearing action and plastify and promote forward.

In actual production, each feed-pipe 6 all arranges stopping valve 11, according to the production rate of the supply of raw material and twin screw extruder, can select open or close some stopping valve 11.

Certainly, in order to provide convenient for producing further, described feeding unit also comprises glass window 12 and vibrator 13, and described glass window 12 is arranged on described hopper 1 outer wall side;Described vibrator 13 is arranged on described hopper 1 outer wall. Arrange the barrel 3 that vibrator 13 can make raw material fall into twin screw extruder fully to extrude, avoid wastage of material. Described top cover 2 is provided with handle 14.

The feeding unit provided in the present embodiment, is provided with filtration unit 5 on described top cover 2, can be blocked by the silk in raw material bag and not fall into hopper, thus ensure the quality of raw material; The top cover 2 arranged, makes raw material be in a relatively airtight space, avoids dust to the oxygen in the pollution of production environment and air and moisture to the impact of the performance of material; The supply that many feed-pipes 6 have effectively ensured raw material is set, conveniently adds plurality of raw materials simultaneously. Compared with prior art, the equipment safety that the utility model provides is reliable, can effectively ensure material quality, it is to increase quality product.

The utility model is not limited to above-mentioned preferred forms; anyone can draw the product of other various forms under enlightenment of the present utility model; no matter but in its shape or structure, do any change; every have the technical scheme identical or close with the application, all drops within protection domain of the present utility model.

Claims

1. a twin screw extruder feeding unit, it is characterised in that: the feed-pipe comprising hopper, top cover, barrel, driving motor, filter screen device and more than; Described filter screen device is arranged on described top cover; Described top cover is hinged on described hopper upper end; The lower end of described hopper is fixed on described barrel, and the lower end of described hopper is connected with described barrel; Described filter screen device comprises tank, lid body and filtering net, and described filtering net is arranged in described tank, and described lid body can be opened or be covered on described tank; Described filtration unit is connected with described hopper; The feed-pipe of more than one is fixed on described lid body, and the feed-pipe of more than is all connected with described filtration unit; Described driving motor is fixedly connected with described barrel, and the screw rod of described driving motor extend in described barrel.

2. twin screw extruder feeding unit according to claim 1, it is characterised in that: described feeding unit also comprise control circuit board and be electrically connected with described control circuit board the first temperature sensor, the 2nd temperature sensor and LED display;

Described control circuit board, described first temperature sensor and described LED display are arranged on described hopper outer wall, and described 2nd temperature sensor is arranged on described barrel.

3. twin screw extruder feeding unit according to claim 1, it is characterised in that: being connected by communicating pipe between the lower end of described hopper and described barrel, described communicating pipe is provided with stopping valve.

4. twin screw extruder feeding unit according to claim 1, it is characterised in that: described feeding unit also comprises heating unit, and described heating unit is arranged on the periphery of described barrel.

5. twin screw extruder feeding unit according to claim 1, it is characterised in that: described feeding unit also comprises refrigerating unit, and described refrigerating unit is arranged on the periphery of described barrel.

6. twin screw extruder feeding unit according to claim 1, it is characterised in that: described feeding unit also comprises glass window, and described glass window is arranged on described hopper outer wall side.

7. twin screw extruder feeding unit according to the arbitrary item of claim 1 to 6, it is characterised in that: each feed-pipe is provided with stopping valve.

8. twin screw extruder feeding unit according to the arbitrary item of claim 1 to 6, it is characterised in that: described feeding unit also comprises vibrator, and described vibrator is arranged on described hopper outer wall.