CN203246054U

CN203246054U - Converting device changing material flow directions

Info

Publication number: CN203246054U
Application number: CN 201320220947
Authority: CN
Inventors: 张帆; 何伟明; 张新建; 王正学
Original assignee: Hi Tech Building Materials (xianyang) Pipe Technology Co Ltd
Current assignee: Hi Tech Building Materials (xianyang) Pipe Technology Co Ltd
Priority date: 2013-04-26
Filing date: 2013-04-26
Publication date: 2013-10-23
Anticipated expiration: 2023-04-26

Abstract

The utility model relates to a converting device changing material flow directions, which comprises a circular ring, wherein the middle of the circular ring is a protrusion; three small holes are formed in the inner side of the circular ring; three large holes are formed in the outer side of the circular ring; the three small holes tilt to the center of the circular ring with 15 to 45 degrees; the three large holes tilt to the edge of the circular ring with 15 to 45 degrees; the three small holes and the three large holes are arranged at intervals. The converting device has the advantages that the pressure of material in a charging barrel is stable; the flow direction of the material is changed after passing through the device, that is, material on an outer layer flows inwards, and material on the inner layer flows outwards, so as to wrap a material with black texture, and achieve the effect that the surface is glabrous, white and bright; the problem of black lines and black texture caused by friction between the screw charging barrel and an extruding machine is reduced and eliminated, so as to prolong the service life of the screw of the machine barrel.

Description

A kind of change Flow of Goods and Materials conversion equipment

Technical field

The utility model relates to a kind of double screw extruder and changes the Flow of Goods and Materials conversion equipment, the utility model is by changing the flow direction of material in the extruder body, change the quality of pipe outer surface, the pressure of PVC material in barrel is increased, the Flow of Goods and Materials rate reduction, improve the extruder plasticizing capacity, strengthen the tubing inherent quality.

Background technology

Need PVC in the pvc pipe material production process, calcium carbonate, enter mixing system after stabilizing agent and flexibilizer measure by the prescription requirement and carry out batch mixing, material is introduced into the high-temperature stirring pot in the batch mixing process, high-temperature stirring pot design temperature is 120 degree, reach and material is entered low temperature batch mixing pot behind the design temperature and cool off, approximately be cooled to about 40 degree, material is discharged, then vacuum sucks in the hopper of extruder, clamp-on extruder by metering screw, in extruder barrel through the heating, shear extrusion is mixed, fully extrude from extruding dies after the plasticizing, enter the vacuum sizing cooling, draw through hauling machine, after arranging by fixed length, cut off by cutting machine, through packing warehouse-in after the assay was approved.In the tubing production process; it is inhomogeneous often can material plasticizing to occur; the situations such as black line; analyze its reason; that the too small and screw rod of material pressure in screw rod and barrel friction cause; the motion mode of screw rod in barrel is: after material enters barrel; produce certain pressure; this pressure makes the material studdle in barrel central authorities; ideally screw rod does not contact barrel; seldom there are the situation of friction in screw rod and barrel like this; but because an extruder need to use different moulds; cause like this when using different moulds the difference of material pressure in extruder larger; cause the situation of screw rod and barrel friction to produce, cause tubing to produce black line, affect the surface quality of tubing; owing to the screw rod growth screw surface processing layer wearing and tearing of service time, the threaded reaction of part material causes tubing goods black line in the PVC prescription simultaneously.

The utility model content

The purpose of this utility model is the defective that overcomes background technology, and a kind of change Flow of Goods and Materials conversion equipment is provided.

Technical solution of the present utility model is: a kind of change Flow of Goods and Materials conversion equipment, comprise annulus (1), it is projection (2) in the middle of the annulus (1), be provided with inboard three apertures (4) and three macropores in the outside (3) in the middle of the annulus (1), inboard three apertures (4) are to centroclinal 15～45 °, three macropores in the outside (3) are to 15～45 ° of edge tilt, and inboard three apertures (4) and three macropores in the outside (3) are alternately.

The utility model makes the pressure stability of material in barrel, and makes material through behind this device, changes original material flow path direction, make the outer inwardly stream of material, internal layer will have black line material parcel wherein to outflow, when not affecting the tubing inherent quality, reach the bright and clean white bright effect in top layer.The black line that desalination and elimination cause because screw cylinder rubs in extruder is deceived the problems such as line, also further prolongs the service life of screw barrel.

Description of drawings

Fig. 1 is the utility model structural representation.

Fig. 2 is the A-A cutaway view of Fig. 1.

The specific embodiment

A kind of change Flow of Goods and Materials conversion equipment, comprise annulus 1, it is projection 2 in the middle of the annulus 1, be provided with three macropores 3 of inboard three apertures 4 and the outsides in the middle of the annulus 1, inboard three apertures 4 are to centroclinal 15～45 °, three macropores 3 in the outside are to 15～45 ° of edge tilt, and inboard three apertures 4 and three macropores 3 in the outside are alternately.The utility model is installed between extruder and the mould, and material changes original material flow path direction through behind this device, make the outer inwardly stream of material, internal layer will have black line material parcel wherein to outflow, when not affecting pipe workpiece quality, reach the bright and clean white bright effect in top layer.

Claims

1. one kind changes the Flow of Goods and Materials conversion equipment, comprise annulus (1), it is characterized in that: be projection (2) in the middle of the annulus (1), annulus (1) is provided with inboard three apertures (4) and three macropores in the outside (3), inboard three apertures (4) are to centroclinal 15～45 °, three macropores in the outside (3) are to 15～45 ° of edge tilt, and inboard three apertures (4) and three macropores in the outside (3) are alternately.