CN103624951B

CN103624951B - A kind of plastic extrusion method of efficiently extruding PA66 internal tooth form gear

Info

Publication number: CN103624951B
Application number: CN201310651135.XA
Authority: CN
Inventors: 徐淑波; 周玉林; 刘玉婷; 杨兴成; 王小燕; 任国成
Original assignee: Shandong Jianzhu University
Current assignee: Shandong Academy of science and technology information
Priority date: 2013-12-08
Filing date: 2013-12-08
Publication date: 2016-05-11
Anticipated expiration: 2033-12-08
Also published as: CN103624951A

Abstract

Provided by the invention a kind of extrude internal tooth form plastic tube shaping dies be shaped internal tooth form plastic gear new method and extrude internal tooth shaping mould of plastics, it relates to plastic extrusion field. Its processing step is: (one) plasticizing; (2) moulding; (3) sizing; (4) the plastic gear finished parts of the different transverse tooth thickness of employing cutting forming. It is extruded internal tooth form plastic pipe shaping dies and is mainly made up of assemblies such as mouth mould, plug and calibration sleeves, and plug and calibration sleeve outer surface are tooth base. Adopt internal diameter sizing method that tubing is directly contacted and cooling and shaping with calibration sleeve, become needed plastic pipe. It is characterized in that: adopt and extrude the plastic pipe that internal tooth form plastic tube shaping dies is shaped, once extrude the internal tooth form plastic pipe of the long size that just can be shaped. Advantage of the present invention is: can produce the plastic gear of different transverse tooth thickness, need not repeat because transverse tooth thickness is different mfg. moulding die. The plastic products of moulding are widely used in the fields such as auto parts and components, mechanical part, air equipment parts, electronic apparatus and precision instrument, part can substitute the metal product in home appliance, electronic product, food machinery and engineering machinery, mechanical strength is high, good toughness, size of pipe and tubing precision is high, has higher working (machining) efficiency compared with mold for injection molding.

Description

A kind of plastic extrusion method of efficiently extruding PA66 internal tooth form gear

Technical field

The invention belongs to a kind of plastic extrusion method of efficiently extruding PA66 internal tooth form gear, the concrete internal tooth form plastic tube that adopts endless on plastic extrusion mould extrusion theory, then cut into internal tooth form plastic gear, be widely used in the fields such as auto parts and components, mechanical part, air equipment parts, electronic apparatus and precision instrument.

Background technology

Along with the continuous rising of metal and alloy melting cost thereof, and the develop rapidly of nonmetal and polymeric material, adopt at present parts nonmetal and that polymeric material is manufactured more and more, wherein the PA66 material in plastics family is not only in fields such as auto industry, mechanical industry, electronic apparatus, mechanical part, air equipment parts, precision instruments, and even in military affairs, is all well used in furniture industry, building industry, packing business. At present, nearly 88% PA66 is processed into various products by injection moulding, approximately 12% PA66 by extruding, the processing and forming such as blowing becomes corresponding goods. The traditional injection molding forming method of the many employings of production of most of internal tooth form plastic gear, but it has a lot of defects, as: running channel condensation waste material is many, stock utilization is lower, and cost is higher, and working (machining) efficiency is lower. Along with the develop rapidly of auto industry, mechanical industry and aerospace industry etc. and day by day intensifying of international competition, the raising to gear product performance and the reduction of processing cost are had higher requirement, especially the raising of working (machining) efficiency. Therefore about the shaping new technology of plastic gear has obtained paying attention to and development. The original traditional injection molding process processing method stock utilization of this type of processing method improves greatly, and working (machining) efficiency also improves, but this type of processing method all adopts injection mo(u)lding production and processing method, and its working (machining) efficiency needs further to be promoted. For this reason, inventor has proposed a kind of plastic extrusion method of efficiently extruding PA66 internal tooth form gear.

This plastic extrusion method of efficiently extruding PA66 internal tooth form gear is taking plastic extruding forming mould as basis, continuous extrusion molding strip internal tooth form plastic pipe on extruder head, then adopt the method for cutting the internal tooth form plastic pipe of continuous extrusion molding to be cut into the plastic gear finished parts with different transverse tooth thickness, need not repeat because transverse tooth thickness is different mfg. moulding die. This kind of method is the technique adopting extruding continuous extrusion molding on internal tooth form forming plastic pipe mould, produce the product that as far as possible approaches gear net shape, therefore this kind of processing method have that production efficiency is high, material-saving, the significant advantage such as energy-conservation, in addition, because the continuous extrusion molding internal tooth form of internal tooth form forming plastic pipe mould plastic pipe is extruded in employing, then adopt cutting technique to be processed into the plastic gear finished parts of different transverse tooth thickness, there is higher working (machining) efficiency than the processing method of injection forming mold.

In this plastic extrusion method of efficiently extruding PA66 internal tooth form gear, adopt the manufacture of extrusion molding mould progressive forming method to approach the strip internal gear plastic pipe of gear part net shape, the manufacturing process working (machining) efficiency of more traditional injection forming mold is high, adopt internal diameter sizing method that tubing is directly contacted and cooling and shaping with calibration sleeve, can ensure the circularity of inner hole of pipe, internal diameter size is accurate, and mould structure is simple, easy to operate, the internal stress of product uses external diameter sizing method less. In Design of Dies, the continuous extrusion molding of internal tooth form plastic tube shaping dies is extruded in employing, then adopts cutting method to be processed into the plastic gear of different transverse tooth thickness, thereby improves working (machining) efficiency, need not repeat mfg. moulding die because transverse tooth thickness is different, greatly save mold materials. The internal tooth form plastic tube that above-mentioned new technology is shaped, not only can make the surface quality of the part obtaining get a greater increase, but also have higher working (machining) efficiency. The advantages such as the part obtaining has can absorption of noise, absorbing, light weight, resist chemical, self-lubricating. There is the features such as high-strength, high-impact, high-wearing feature, good processability, economic and practical be stronger, can partly substitute the metal material parts in the fields such as auto industry, mechanical industry, electronic apparatus, mechanical part, air equipment parts, precision instrument. Therefore the new method that, the internal tooth form plastic tube that the shaping dies of internal tooth form plastic tube extrudes is extruded in this utilization has good use value and future develop.

Summary of the invention

The object of patent of the present invention is: for the problem of above-mentioned existence, overcome the material poor efficiency of internal tooth form plastic gear processing with working (machining) efficiency compared with low and because of the different mfg. moulding dies repeatedly of part transverse tooth thickness. On plastic extruder, adopt the manufacturing process of extruding continuously internal tooth form plastic pipe, then adopt cutting technique to be processed into the gear finished parts of different transverse tooth thickness. With the manufacturing process of extruding continuously internal tooth form plastic pipe, more traditional injection molding technology has improved working (machining) efficiency, has reduced the consumption of material. Extrude continuously the manufacturing process of internal tooth form plastic pipe, can just can extrude very long internal tooth form plastic pipe through an extrusion molding, then through cutting into the plastic gear finished parts of different transverse tooth thickness, more traditional injection molding method, can further improve the working (machining) efficiency of gear. Effectively solved the problem existing in prior art and the defect that need to repeat mfg. moulding die, effectively part substitutes the parts of the metal material in the fields such as auto industry, mechanical industry, electronic apparatus, mechanical part, air equipment parts, precision instrument.

The technical scheme of patent of the present invention is: the present invention is a kind of mould that internal tooth form plastic tube is shaped of extruding, and comprises four corresponding stages of plastic gear finished parts of plasticizing, moulding, sizing, the different transverse tooth thickness of cutting forming.

Mainly mixing to plastics of the heating by extruder heater and screw rod, barrel of plastic phase, the frictional heat that shear action produces make solid plastics become uniform viscous state plastics; Formative stage be mainly viscous state plastics under the promotion of screw rod, with certain pressure and speed continuously by mouth mould with there is the former of external tooth base plug, thereby obtain the internal tooth form plastic pipe with certain size and shape; The sizing stage is mainly in the calibration sleeve that has external tooth base, to make in type shape be fixed up, and becomes needed plastic products; The cutting forming stage is mainly the plastic gear finished parts that the internal tooth form plastic pipe of continuous extrusion molding is cut into many different transverse tooth thickness.

Adopt this kind of scheme, by extruding continuously the internal tooth form plastic pipe of the longer size of manufacturing process once-forming of internal tooth form plastic pipe, then adopt be finally the shaped plastic gear finished parts of different transverse tooth thickness of cutting technique. This new technology can realize higher Gear Processing efficiency.

Beneficial effect of the present invention: the present invention is owing to adopting a kind of plastic extrusion method and cutting processing technique of efficiently extruding PA66 internal tooth form gear, can produce the plastic gear of different transverse tooth thickness, need not repeat mfg. moulding die because transverse tooth thickness is different, thereby save mold materials. On plug and calibration sleeve, adopt external tooth base, and adopt internal diameter sizing method to carry out accurately sizing to internal tooth form plastic pipe, tubing directly contacts and cooling and shaping with calibration sleeve, can ensure the circularity of inner hole of pipe, internal diameter size is accurate, and mould structure is simple, easy to operate, the internal stress of product is less compared with external diameter sizing method. The plastic products of moulding are widely used in the fields such as auto parts and components, mechanical part, air equipment parts, electronic apparatus and precision instrument, part can substitute the metal product in home appliance, electronic product, food machinery and engineering machinery, mechanical strength is high, good toughness. The forming technology that internal tooth form plastic tube mould is extruded in employing has higher working (machining) efficiency than the injection forming process.

Brief description of the drawings

By reference to the accompanying drawings specific embodiment of the invention scheme to be described in detail below.

Fig. 1 is the simple schematic diagram of internal tooth form plastic gear extrusion method mould of the present invention.

Fig. 2 is the forming process schematic diagram that the present invention processes internal tooth form plastic gear part.

Detailed description of the invention

Fig. 1 is the simple schematic diagram of internal tooth form plastic gear extrusion method mould of the present invention; Fig. 2 is the forming process schematic diagram that the present invention processes internal tooth form plastic gear part; Plug and calibration sleeve outer surface are tooth base. First, mixing to plastics of the heating by extruder heater and screw rod, barrel, the frictional heat that shear action produces make solid plastics become uniform viscous state plastics; Then make viscous state plastics under the promotion of screw rod, with certain pressure and speed continuously by mouth mould with there is the former of the plug of external tooth base, formed tooth shape plastic pipe between mouth mould and plug, and obtain certain size and shape. Adopt internal diameter sizing method to make in type shape be fixed up outward at calibration sleeve, become needed plastic products. Finally cut into the plastic gear finished parts of many different transverse tooth thickness by the processing method of cutting.

Claims

1. efficiently extrude the plastic extrusion method of PA66 internal tooth form gear for one kind, it is characterized in that: taking plastic extruding forming mould as basis, continuous extrusion molding strip internal tooth form plastic tube on extruder head, then adopts the method for cutting the internal tooth form plastic tube of continuous extrusion molding to be cut into the plastic gear finished parts with different transverse tooth thickness; Described plastic extruding forming mould includes a mouthful mould, calibration sleeve and plug, and described mouth mould, is the external diameter for the internal tooth form plastic tube that is shaped; Described calibration sleeve outer surface is profile of tooth and adopts internal diameter sizing method to carry out accurate sizing to the internal tooth form plastic tube being shaped; Described plug is for the internal diameter of the internal tooth form plastic tube that is shaped and internal tooth base.