JPS59140044A - Die for vulcanization of tire - Google Patents

Abstract

PURPOSE:To provide the titled die which enables the fitting parts into each other accurately without fail by working and fixing spring pins at different proper positions for each sector at two stages, upper and lower to enable the fitting. CONSTITUTION:Spring pins 3 which have tread segments 1 comprising a plurality of split molds securely fitted into sectors 2 are worked at different proper positions circumferentially for each sector on the inner surface of the sectors 2, namely, the outer surface of the tread segments 1. In the working, for example, the spring pins 3 are fixed on the side of the sectors 2, small holes for fitting the pins 3 are cut at positions corresponding to the tread segments 1, and then, they are worked for each sector at two stages, upper and lower.

Description

[Detailed Description of the Invention] This invention relates to an improvement in the fitting of both tread segments and sectors among the parts constituting a mold used for tire vulcanization, and the present invention relates to improvements in the fitting of both tread segments and sectors. Each tread segment and sector has a pair of t
This invention relates to a tire curing mold characterized in that the upper mold is precisely fixed with two spring pins machined at specific positions with different IJ.

Split tread segments and sectors constituting a tire curing mold are used to form a tread pattern on the tread portion of the tire and lettering marks on the sidewall portion during tire curing.

With σC, the fitting parts of the segments and sectors of the split-type tread are constructed at the same angle, and the pitch C arrangement of the tire's tread pattern and the lettering marks on the sidewall are formed in a fixed order. must be maintained.

To explain this using FIG. 1, in tread segment 1 and sector 2, as shown in the plan view of FIG. They must be fitted in such a way that they correspond to A'9 B', H', H', and S', respectively.

However, since all of these compatible devices have 1,000 pairs of spring pins fixed and fitted to the same part, it is possible to make a fitting error when fitting. In some cases, the pitch sequence of the tire tread pattern becomes incorrect, making it difficult to form a normal tread pattern or lettering marks on the tire, and the vulcanized tire may have to be scrapped. There were many.

In view of the above points, the inventors of the present invention have studied ways to fit the parts together accurately without making mistakes, and as a result, they have arrived at the present invention.

That is, the present invention also applies to the tread segment 1 and the sector 2, each of which is made of a split die, in order to make the corresponding fittings accurate, as shown in FIG. Spring pin 3 is attached to the outer cylinder to allow each sector to be unique/) 41 J! t
For example, the spring pin 6 is fixed on the sector 2 side, and a small hole for fitting the pin 6 is provided in a corresponding position on the tread segment 1 in a protruding manner.

The spring pins are machined in two north T steps in each sector 7rf at different unique positions as shown in FIG. 3 as a sectional view taken along the line X--X in FIG. 1.

As described above, in the fitting of the tread segments and sectors, each of which is made of a split mold, the present invention involves machining and fixing a spring pin in each sector Iσ with a different specific position so that the fitting can be achieved. Therefore, with very simple operations, we can eliminate compatibility between component parts and create a single pair of shoes.
This allows the IM to be fixedly fitted, thereby preventing fitting errors during fitting, which is extremely effective in practical use.

[Brief explanation of drawings]

Figure 1 shows the fitting shape fQ of the tread segment and sector.
The plan view shown in Fig. 2 shows each cell J-? A plan view showing the machining positional relationship of the spring pin of σ, Fig. 5 is Fig. 2
It is a cross-sectional +Mi diagram of X-rays. 1... Tread segment, 2... Sector, 5
...°'Sprinkl, 4... ), 'l mold, 5.°・shape mold, 6...Actuator patent applicant Sumitomo Rubber Industries, Ltd.; J-7 dispute resolution (spontaneous) 1. Indication of the case Patent Application No. 13351 of 1982 2. Name of the invention Tire vulcanizing mold 3. Person making the amendment Relationship to the case Patent applicant (spontaneous) 5. Details subject to the amendment A column for a detailed description of the invention in the book. 6. In the statement of contents of the amendment, page 3, line 17, the phrase "with different hardness" has been changed. ) I will correct it to l.

Claims (1)

[Claims] In a tire curing mold consisting of an upper mold, a T5 mold, an actuator, a tread segment, and a sector, the tread segment and sector, each consisting of a plurality of split molds, can be placed at specific positions that are different from each other in pairs. A tire curing mold characterized by fitting and fixing with two spring pins processed in a T-shape.