CN201086390Y

CN201086390Y - Extruder filter board

Info

Publication number: CN201086390Y
Application number: CNU2007200739381U
Authority: CN
Inventors: 田须然; 赵宇; 刘红兵; 王培武; 胡松林; 杜赏
Original assignee: Shanghai Kingfa Science and Technology Co Ltd; Guangzhou Kingfa Science and Technology Co Ltd
Current assignee: Shanghai Kingfa Science and Technology Co Ltd; Guangzhou Kingfa Science and Technology Co Ltd
Priority date: 2007-08-21
Filing date: 2007-08-21
Publication date: 2008-07-16
Anticipated expiration: 2017-08-21

Abstract

The utility model relates to a filter board of an extruder, which is arranged between a screw cylinder (3) and a machine head (4) of the extruder and is composed of a metal plate opened with a plurality of through-holes. The utility model is characterized in that a concave area between the outer margin of a filter board main body (1) and a joint part of the machine head (4) is of a rounding transition boundary with 45DEG; a chamfer angle, the semidiameter r of which is 1.5 mm, is arranged at the inlet of a through-hole (2) arranged on the filter board main body (1); the range of the diameter r of the through-hole (2) is more than or equal to 2.5 mm and less than or equal to 6 mm. The smoothly transitional concave area is formed between the outer margin of the filter board and the filter board main body, thus material can successfully pass through the machine head without detention at the joint, the material flow is ensured more unhindered, and the flowing pressure of fused mass is more stable; because of the improved transition boundary structure, the dead angle at the joint between the filter board and the screw cylinder as well as the machine head. The chamfer angle, the semidiameter r of which is 1.5 mm, is arranged at the through-hole on the filter board at the same time, thus the material acts the chamfer angle processing at a feeding end of the through-hole. The resistance for the material to enter in a filtration pore is reduced, the material updating is accelerated, the energy cost for transmitting the fused mass is saved, and the purpose of energy conservation is achieved.

Description

A kind of extruder filter plate

Technical field

The utility model relates to the workpiece on a kind of plastic extruder, and particularly a kind of extruder filter plate belongs to plastics machinery accessory class.

Background technology

In the modified plastics industry, extruder is the key equipment of producing, and the workpiece screw rod of extruder, barrel can carry out fusion, mixing and conveying with plastics, are extruded into the material bar by head at last.The junction of extruding machine barrel and head is equipped with filter plate usually, and the plastic melt of fusion flows to head from barrel by filter plate, and the effect of filter plate is to be used for stabilization head pressure and install filter screen additional.

Sneak in the plastic melt of having extruded of ordinary production by the impurity that produces producing that material carbonization, decomposition appear when higher in temperature-sensitive material or extrusion temperature easily for present extruder, causes the bad order and the problem such as off quality of product.

Through experiment with analyze, the main cause of finding above-mentioned phenomenon is that the long-term delay of fused materials is easily caused at the dead angle of the junction of extruder filter plate and barrel, head, thus the carbonization when causing temperature high.In order to handle the material that place, these dead angles is detained, the method that adopts is regularly to remove the carbide of deposition at present, but can not effectively guarantee the quality of producing like this, and needs breaks in production, causes losses such as shutdown.

Through the inventor to the filter-plate structure of general use and the analysis of combined situation, existing filter plate is the metallic plate that has a plurality of through holes, the inlet of through hole does not carry out chamfered, and filter plate is when being installed on the barrel of extruder and the head by the filter plate outer rim, make barrel, filter plate, head three's joint portion have the dead angle, cause material not only to be detained, to decompose charing at the place, dead angle, be easy to be involved in the materials flow of fusion again, thereby influenced the outward appearance and the quality of product, especially produced temperature-sensitive material.

The utility model content

The purpose of this utility model: the extruder bushing that aims to provide a kind of novelty, the recessed district by rounding off is set and the feeding end chamfered of through hole, solve filter plate junction material lagging, cause the material carbonization and influence the problem of product quality, that realizes producing carries out stability with technology, product quality smoothly.

This extruder filter plate, be installed between the barrel 3 and head 4 of extruder, form by the metallic plate that has a plurality of through holes, it is characterized in that: the recessed district between the joint portion of filter plate main body 1 outer rim and head 4 is down the round-corner transition borders of 45 degree, is arranged at the chamfering that through hole 2 inlet on the filter plate main body 1 is provided with radius r=1.5mm.

Described through hole 2 diameter range 2.5mm≤r≤6mm.

According to this extruder filter plate that above technical scheme proposes, by the recessed district of rounding off and the setting of through hole chamfering, both eliminated in the filter plate junction and produced the possibility that plastic melt is detained and decomposes charing, guaranteed the quality of product; The stability and the energy efficient that also help simultaneously the continuity production technology.

Description of drawings

Fig. 1 is the structural representation of extruder filter plate of the present utility model.

Among the figure: 1, filter plate main body 2, through hole 3, barrel 4, head.

The specific embodiment

This extruder filter plate as shown in the figure, it is a kind of improvement to existing congenerous filter plate.Have the filter plate of the metallic plate composition of a plurality of through holes, be installed between the barrel 3 and head 4 of extruder, the filter plate outer rim is connected with head 4 transition with the fillets that recessed district between the filter plate main body is down 45 degree, be arranged at through hole 2 on the filter plate main body 1 and be provided with the chamfering of radius r=1.5mm, described through hole 2 diameter range 2.5mm≤r≤6mm.

The recessed district of rounding off will be arranged between filter plate outer rim and the filter plate main body, make material can pass through head smoothly, be not detained in its junction, guarantee that materials flow is more smooth and easy, melt flows pressure is more stable, owing to the transition boundary structure after improving, eliminated the dead angle of filter plate and barrel, head junction.On the through hole on the filter plate, be provided with simultaneously the chamfering of radius r=1.5mm, make material carry out chamfered at the feeding end of through hole.Reduce the resistance that material enters filter opening, quickened material and upgrade, saved the energy consumption of melt conveying, reached purpose of energy saving.

Claims

1. extruder filter plate, be installed between the barrel (3) and head (4) of extruder, form by the metallic plate that has a plurality of through holes, it is characterized in that: the recessed district between the joint portion of filter plate main body (1) outer rim and head (4) is down the round-corner transition borders of 45 degree, is arranged at the chamfering that through hole (2) inlet on the filter plate main body (1) is provided with radius r=1.5mm.

2. a kind of extruder filter plate as claimed in claim 1 is characterized in that: described through hole (2) diameter range 2.5mm≤r≤6mm.