CN1297810A

CN1297810A - Accurate manufacture process of movable die for meridian cord tyre

Info

Publication number: CN1297810A
Application number: CN 01108028
Authority: CN
Inventors: 宁新华
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-01-05
Filing date: 2001-01-05
Publication date: 2001-06-06

Abstract

After the sector block for the die is cut and assembled into the die, the die is fine turned, sculptured to form pattern so as to form one movable integral circular mold cavity with uniform interfaces between the sector blocks. The manufacture process can improve the dynamic performance and appearance quality of the sulfurized meridian cord tyre greatly.

Description

Accurate manufacture process of movable die for meridian cord tyre

The present invention relates to a kind of activating mold manufacture method, particularly accurate manufacture process of movable die for meridian cord tyre.

For adapting to the radial of running at high speed and growing up of automobile, its dynamic and static balance quality is very important quality index.And tyre vulcanization is the greatest factor that influences the dynamic and static balance quality of tire with the geometric accuracy and the dimensional accuracy of adjustable mold cavity.

Now the method for the manufacturing tyre adjustable die that generally adopts of each mould manufacturer is: earlier the steel annulus according to drawing required precision machine-shaping, again at annulus inner chamber engraved die decorative pattern, and then pattern ring is cut into the secter pat of some equal portions with wire cutting machine edge of bed radial direction; Again these secter pats are fixed on the circumferential slide block singly; The inner chamber of these secter pats has just formed the outline of tire behind the matched moulds.If the cutting secter pat is 0.18 millimeter with the diameter of molybdenum filament, the gap width of cutting out is generally between 0.19 millimeter-0.20 millimeter.In order to eliminate the form error of cut surface, also to carry out each lambrequin piece to grinding, with the even cooperation (gap is between the 0.03-0.05 millimeter) that guarantees composition surface between them.This is actually in order to D ₁For a section circular arc on the circle of diameter is spliced into approx with D ₂Circle for diameter.This just make mold cavity and the tire that vulcanizes out be not a circle in theory.In addition, for guaranteeing the fit clearance uniformity between each secter pat, will block-by-block the end face of each secter pat be carried out grinding, time-consuming, be difficult to more handle when especially bedding-in is to a last mating surface, difficulty of processing is big; Careless slightly, will cause this mating surface excesssive gap, vulcanize the tire that and have overlap.Above-mentioned two factors had both influenced the geometric accuracy of tire, influenced the dimensional accuracy and the presentation quality of tire again.

The objective of the invention is to provide a kind of accurate manufacture process of movable die for meridian cord tyre, and this method can be guaranteed the geometric accuracy and the dimensional accuracy of mold cavity, and makes between each secter pat and to cooperate closely.

The object of the present invention is achieved like this: (1), at first rough turn the inside and outside circumference and the two side faces of steel annular blank, and each machined surface all leaves allowance; (2), along radius the annulus after rough turn is cut into the secter pat of some five equilibriums by designing requirement; (3), the end face of each secter pat is carried out fine finishining, and each secter pat is spliced into annulus again; (4), this annulus of finish turning is to design size; (5), in annulus inner chamber engraving tyre tread; (6), separately, and be separately fixed on the corresponding slide block and form adjustable mold cavity with each lambrequin piece.

Such scheme can guarantee that each secter pat closes up the back and forms a regular annulus die cavity, and make closely knit, the uniformity of contact-making surface between each secter pat, thereby the power performance and the presentation quality of radial that raising is greatly vulcanized have reached purpose of the present invention.

Claims

1, a kind of accurate manufacture process of movable die for meridian cord tyre is characterized in that: (1), at first rough turn the inside and outside circumference and the two side faces of steel annular blank, and each machined surface all leaves allowance; (2), along radius the annulus after rough turn is cut into the secter pat of some five equilibriums by designing requirement; (3), the end face of each secter pat is carried out fine finishining, and each secter pat is spliced into annulus again; (4), this annulus of finish turning is to design size; (5), at annulus inner chamber engraved die decorative pattern; (6), separately, and be separately fixed on the corresponding slide block and form adjustable mold cavity with each lambrequin piece.