JPS6015693B2 - Jig to support heated glass products - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pick-up for supporting heated glass products during the manufacture of glass products.

This kind of pick-up tool is used, for example, when manufacturing glass bottles, when the glass bottle is molded in a mold, and then the glass bottle is gripped by the open end of the heated glass bottle and taken out from the opened mold.

However, this jig requires certain conditions in order to handle heated glass products.

For example, the mouthpiece of a heated glass bottle is 400 to 700
It has a temperature of about 300 yen, and is within the temperature range where a sudden change in temperature will cause cracks in the glass bottle.
Picking tools must have low thermal conductivity to avoid sudden temperature changes to the glassware, and to prevent odors from oxidizing and scale from adhering to the glassware at such high temperatures, causing discoloration and deterioration. It is necessary to have good oxidation resistance and good workability, particularly machinability, in order to process it into a shape that can stably support glass products. It is also necessary to have a coefficient of thermal expansion close to that of glass products, and to have good corrosion resistance so as not to be corroded by oil, lubricants, etc.
In response to this requirement, conventionally used picks are made of materials such as graquaite, which has good thermal conductivity, brass, gunmetal, and mild steel, which have good machinability.

However, graquaite has poor impact properties and notch properties, and even though it is precisely machined, it has a high breakage rate and is inefficient.
Yellow steel and gunmetal have high thermal conductivity and give a rapid cooling effect to glass products, making them prone to cracks. Mild steel has poor oxidation resistance and oxidizes at high temperatures, causing scale to adhere to glass products. (Conventionally, when using a jig made of yellow steel or gunmetal, the jig is heated to prevent sudden temperature changes from occurring on the glass product, but the jig oxidizes and scales are generated.)
As described above, there has not been a pick-up device that satisfies the required conditions in the past. The present invention overcomes these problems and provides a jig for supporting heated glass products that satisfies the required conditions.

The sill supporting the heated glass product of the present invention is characterized by being molded from an alloy consisting of 2 to 88% aluminum, 10 to 30% chromium, and the balance substantially iron.

The reasons for limiting the ingredients of the alloy used to form the pick of the present invention are as follows.

If the amount of aluminum A and chromium Cr added increases, the thermal conductivity will decrease to 4.0 and the oxidation resistance will improve, but
If the aluminum content is 8% or more and the chromium content is 30% or more, the machinability, especially the hot and cold workability, deteriorates significantly. Less than 2% aluminum, 10% chromium
If it is less than this, oxidation resistance and heat insulation properties will deteriorate, which is not preferable. Note that there is no problem as long as the total content of impurities such as a deoxidizing agent and unintentionally mixed poppy seeds, elements, and manganese is 2% or less. This alloy also contains titanium Ti, zirconium Zr, hafnium Hf, yttrium Y, and cerium Ce.
By adding 1% or less of lantern and lantern Buddha alone or in combination, it is possible to significantly improve the hot and cold workability of odor pick-up, and it is possible to oxidize the alloy to which the above components have been added. Alumina (Q'-A〆2
03) is formed, the thermal conductivity is made uniform, the peeling resistance of the oxide film is improved under high temperatures, and the adhesion of scale to glass products can be prevented.

That is, the mechanical strength of the surface oxidized modified layer is improved, and it is effective in preventing scale peeling. Therefore, by forming the jig of the present invention from an alloy consisting of 2 to 8% aluminum, 10 to 30% chromium, and the balance substantially iron, the jig has a low thermal conductivity, and when supporting a heated glass product, it suddenly It can prevent cracks in glass products without providing a significant cooling effect, has good oxidation resistance under high temperatures, does not generate scale, and can prevent scale adhesion to glass products, and has good workability, especially machinability. It can be easily processed into a shape to stably support glass products.

In addition, this pick-up tool is based on the coefficient of thermal expansion of glass (50 to 130 x 1
Thermal expansion coefficient close to 0-7) (120-130×10-7)
It also has good corrosion resistance. In this way, this jig can provide good support for heated glass products without damaging them during the production of glass products, for example when removing the glass products from a mold.

Note that the shape and structure of the odor pickup can be set in various ways depending on the shape of the glass product, how it is supported, etc. [Comparative Example] As an example of a sample, a jig for supporting a glass bottle as shown in FIGS. 1 and 2 was manufactured.

This jig is a combination of a pair of divided bodies 11 and 11' having the same configuration, and grips the account portion of a glass bottle 12 with semicircular notches 11a and 11a' formed at the ends of each divided body. It is. Then, as an example of the present invention, this common odor was molded with different alloy compositions, and as a conventional example, molded with yellow steel and steel. The chemical resistance was measured. The results are shown in Table 1 (thermal conductivity) and Table 2 (oxidation resistance). 1st
Table 2 As shown in Tables 1 and 2, the thermal conductivity of the picker according to the present invention is approximately 1/10 lower than that of the secondary jig, and it is difficult to grasp glass bottles. When used for this purpose, there were no cracks in the glass bottles, and there was no discoloration or deterioration of the glass bottles due to the formation of oxidized scale.

The jig for supporting heated glass products of the present invention is optimal for supporting glass when manufacturing glass products, and is industrially very useful.

[Brief explanation of drawings]

FIG. 1 and FIG. 2 are a front view and a plan view, respectively, showing one embodiment of the jig. 11, 11'...Divided body, 12...Glass bottle. Ending/Fly Mekudokoro

Claims (1)

[Scope of Claims] 1. A heated glass characterized in that at least the portion in contact with the glass product is formed of an alloy consisting of 2 to 8% aluminum, 10 to 30% chromium, and the remainder substantially iron by weight. A jig that supports the product. 2. A jig for supporting a glass product according to claim 1, which has an oxidized modified layer formed on the surface of the portion that comes into contact with the glass product.