CN102824878A

CN102824878A - Granulation extruder with cylinder which requires no heating

Info

Publication number: CN102824878A
Application number: CN2011101616017A
Authority: CN
Inventors: 何德方; 邓少东
Original assignee: Zhangjiagang Beier Machinery Co Ltd
Current assignee: Zhangjiagang Beier Machinery Co Ltd
Priority date: 2011-06-16
Filing date: 2011-06-16
Publication date: 2012-12-19

Abstract

Disclosed is a granulation extruder with a cylinder which requires no heating. According to the granulation extruder, a screw is divided into two function sections in the length direction. In a first section, metering and conveying functions of a material are realized. The material from a feed opening is equally and uniformly sent to a second functional section by the utilization of a screw structure with equal screw pitch and equal screw channel depth in the first section. In the second section, a screw structure adopts an abrupt radial involute form and is adopted to extrude the material out from small circular holes on the wall of the cylinder so as to realize the granulation function. As the cylinder and an extrusion die head needn't to be heated and the length-diameter ratio of the screw is greatly reduced, the extruder is simple in structure and can be used to save electric energy during the usage process so as to greatly reduce machine cost and granulation production cost.

Description

The granulating extruder that a kind of machine barrel need not to heat

Affiliated technical field

The present invention relates to a kind of process of manufacture employed granulating extruder, especially its machine barrel and die head and need not heat the extruder that just can carry out granulation at plastics, chemical industry and food.

Background technology

At present, the employed granulating extruder of known process of manufacture at plastics, chemical industry and food, the rotation that all need on machine barrel and die head, be heated to uniform temperature and screw rod is extruded to combine and is carried out granulation; Long-time powerful heating; Consumed a lot of electric energy, the granulation production cost is improved greatly, the complicacy that granulating extruder machine barrel, screw rod and die head become; Precision improves, and it is complicated that production technology becomes.

Summary of the invention

In order to overcome the deficiency that the employed granulating extruder of the existing process of manufacture that is used in plastics, chemical industry and food exists, the granulating extruder that the present invention provides a kind of machine barrel to need not to heat, this granulating extruder designs screw-rod structure again; Screw rod is divided into two function sections at length direction; First section is realized the metering conveying function to material, and second section is realized function is extruded in the compacting of material, because machine barrel and extrusion die need not heating; The draw ratio of adding screw rod reduces greatly; So this extruder is not only simple in structure, and in use can save electric energy, the cost of machine and granulation production cost are significantly reduced.

The technical scheme that novel its technical problem of solution of the present invention is adopted is

The extrusion screw rod of this invention links to each other with the feed opening of machine barrel in that the first function section is anterior, and future, the material of this feed opening utilized the screw-rod structure of spiral groove depth such as uniform pitch on this section, carries out equivalent, delivers to the second function section equably; The structure of the second function section is compared with the structure of the first function section very big variation has been taken place; The length of this section is very short, and spiral shell rib mechanism has also become radially involute form by original axial screw form, and the external diameter of spiral shell rib and machine barrel is undergone mutation at this; Outer diameter side is original twice; The barrel of sudden change machine barrel is at circumferencial direction many outside apertures that run through that distributed, and the involute cylindrical maximum of sudden change spiral shell rib closely suits with the inner tube wall of sudden change machine barrel, when extrusion screw rod externally is rotated under the driving of power; Material is delivered to the second function section continuously by the first function section of screw rod; In the second function section, the involute spiral shell rib that material is suddenlyd change is constantly compression in rotary course, along with constantly diminishing of compression stroke; The material that is compacted finally is extruded the circumference aperture on the machine barrel barrel; The cutting knife of rotation is installed on the excircle on the extruder barrel barrel, and the material bar of extruder barrel barrel is cut into particle, has accomplished granulation process.

The novel beneficial effect of the present invention is

Saved electric energy, the granulation production cost is reduced greatly, the simplification that granulating extruder machine barrel, screw rod and die head and production technology become.

Description of drawings,

Below in conjunction with accompanying drawing and embodiment the present invention is further specified.

Two novel plan views of accompanying drawing reflection the present invention.

In the accompanying drawing:

1. machine barrel drive end bearing bracket; 2. spring bearing before the screw rod; 3. screw rod; 4. machine barrel feed opening; 5. machine barrel; 6. cutting knife dish spring bearing; 7. cutting knife dish; 8. cutting knife; 9. barrel wall radial hole; 10. machine barrel rear end cap; 11. spring bearing behind the screw rod; 12. involute spiral shell rib radially;

The specific embodiment

Screw rod (3) supports and can rotate by circumferencial direction through spring bearing (11) behind spring bearing (2) before the screw rod and the bar; Spring bearing (11) is installed on machine barrel drive end bearing bracket (1) and the machine barrel rear end cap (10) behind preceding spring bearing (2) of screw rod and the screw rod; When screw rod (3) externally is rotated under the driving of power; Come the material of this machine barrel feed opening (4) evenly to be delivered to the saltation zone at rear portion through machine barrel (5); Under the compression of involute spiral shell rib (12) radially, extrude, on the excircle of machine barrel (5), cutting knife dish (7) is installed through cutting knife dish spring bearing (6) from barrel wall radial hole (9); Be fixed with several groups of cutting knifes (8) on cutting knife dish (7) circumferencial direction; The edge of a knife position of cutting knife (8) and the outside of barrel wall radial hole closely suit, and cutting knife dish (7) rotates under external force, and the material material bar of extruder barrel radial hole (9) has been cut into particle.

Claims

1. the granulating extruder that machine barrel need not to heat carries out granulation and extrudes in the process of manufacture of plastics, chemical industry and food, and it is characterized in that: its machine barrel and die head need not heat the extruder that just can carry out granulation.

2. granulating extruder according to claim 1 is characterized in that: spiral shell rib structure is involute form radially, screw rod in rotary course with constantly compression and the circumference aperture extruded on the barrel carries out granulation of material, without any need for heating.