JPH0812356A - Glass forming machine and glass forming method using the same - Google Patents

Abstract

(57) [Summary] [Purpose] Along with improving the yield by enabling precision transfer of glass material to the desired glass shape,
It is an object of the present invention to provide a glass molding machine that uses a mold moving method to improve mass production efficiency. [Structure] An upper heater block 12 having an upper heater 11, an upper die 13 pressed by the upper heater block 12, a lower die 14 corresponding to the upper die 13, and a lower die 14 It is composed of a lower heater block 16 that supports and has a lower heater 15, and a barrel mold 17 that is provided on both sides of the upper mold 13 and the lower mold 14. The upper heater block 12 has a hole 21 on the bottom surface. The upper die 13 has a configuration in which the push pin 20 that fits into the hole 21 provided in the upper heater block 12 is provided on the upper surface of the upper die 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultra-precision glass molding machine and a glass molding method using the same.

[0002]

2. Description of the Related Art A conventional technique will be described below with reference to the drawings.

FIG. 3 is an enlarged view of a cylinder head which is a glass molding portion in a conventional glass molding machine.

Generally, there are two types of glass molding machines, one of which uses a mold fixing system and the other of which uses a mold moving system. Both types of glass molding machines use a cylinder head 8 shown in FIG.
It has. The cylinder head 8 is pressed by a pressing machine and has an upper heater block 2 provided with an upper heater 1, and an upper die 3 pressed by the upper heater block 2.
And a lower die 4 corresponding to the upper die 3 and the lower die 4
And a lower heater block 6 that supports a lower heater 5 and a barrel mold 7 provided on both side surfaces of the upper mold 3 and the lower mold 4.

First, in a mold-fixing type glass molding machine, one and the same cylinder head 8 performs the steps from the start to the end of glass molding. Normally, a plurality of cylinder heads 8 are used to individually form glass to improve productivity. The glass molding method is the upper mold 3 and the lower mold 4.
And a glass material 9 disposed between the upper and lower molds 3 and 4 and the glass material 9 is heated by the upper heater 1 and the lower heater 5 to a temperature not lower than the glass deformation point.
A step of pressing the upper heater block 2 by a pressing amount such as a cylinder by an amount corresponding to the amount of pressing to lower the upper die 3 to press and deform the glass material 9 into a desired shape, and the glass material 9 deformed into the desired shape. It is a method having a step of cooling.

Further, in the mold moving type glass forming machine, a plurality of cylinder heads 8 perform the steps from the start to the end of glass forming. The process is divided by each cylinder head 8. The glass forming method is a method of dividing a glass forming process by a mold fixing method into a plurality of cylinder heads 8, and a glass material 9 is provided between an upper heater 1 and a lower heater 5 set to a glass deformation point temperature.
By moving the upper mold 3 and the lower mold 4 arranged between
A step of heating the glass material 9 to a temperature equal to or higher than the glass deformation point, and pressing the upper heater block 2 by a pressing amount such as a cylinder by a pressing machine such as a cylinder to push down the upper mold 3 to lower the glass material 9 into a desired shape. The method includes a step of cooling the glass material 9 by moving the upper mold 3 and the lower mold 4 with the glass material 9 deformed under pressure to be placed therebetween.

[0007]

SUMMARY OF THE INVENTION In the above conventional configuration,
In the case of the mold-fixing type glass molding machine, there is a problem that the time required for changing the temperature of heating and cooling the glass material 9 is long and the mass production efficiency is poor.

In the case of a mold moving type glass forming machine, the upper heater block 2 and the lower heater block 6 are used.
The glass material 9 is desired unless the difference between the actual temperature of the glass material 9 and the displayed temperature of the upper heater block 2 and the lower heater block 6 is corrected each time due to the variation in the temperature detection value for presetting the temperature of the glass material 9. However, there was a problem that the yield could be deteriorated because the precision transfer for precisely transferring to the glass shape could not be performed.

Further, in the case of either glass forming machine,
During glass forming, the glass material 9 is formed at a temperature equal to or higher than the deformation point of the glass, so that the glass material 9 having a large coefficient of thermal expansion is used.
When using, after the end of the subsequent cooling step,
There has been a problem that the molded glass material 9 has a large shrinkage ratio, and precision transfer cannot be performed, resulting in poor yield.

The present invention solves the above-mentioned problems, and enables a precise transfer for precisely transferring a glass material to a desired glass shape, thereby improving the yield and improving the mass production efficiency. The present invention provides a glass forming machine.

[0011]

In order to solve the above problems, the present invention corresponds to an upper heater block provided with a heater, an upper die pressed by the upper heater block, and the upper die. A lower die and a lower heater block supporting the lower die and provided with a heater, the upper heater block has a hole on the bottom surface, and the upper die is provided on the upper heater block. Extruding pin that fits into the hole A structure provided on the upper surface of the upper mold.

Further, the molding method is as follows: a first step of pressing the upper heater block with a pressing machine and pushing down the upper mold to the extent of contacting the glass material with the push pin, and the upper heater block and the lower heater block. The second step of raising the temperature to the glass deformation point by the heater and pressing the glass material by the upper mold, and the temperature lowering to the glass transition point by the heaters of the upper heater block and the lower heater block, and pressing the upper heater block by the pressing machine. And a third step of pressing down the upper mold to mold the glass material.

[0013]

With the above construction, in a glass molding machine using a mold moving system, the glass molding is performed by dividing the process by each cylinder head, so that mass productivity can be improved.

Further, the upper heater block has a hole in the bottom surface thereof, and the upper mold has a push pin fitted in the hole provided in the upper heater block on the upper surface of the upper mold. As a result, if the temperature of the upper heater block and the lower heater block is raised to near the glass deformation point, the glass material is pressed by the upper mold as the glass material softens, and the internal pressure of the glass material is applied by the upper mold. The upper die automatically lowers until it balances with. As a result,
It can be easily and accurately determined that the temperature of the glass material has risen to the glass deformation point, and there is no need to consider the difference between the actual temperature of the glass material and the temperature displayed by the temperature detection values of the upper and lower heater blocks. . That is,
It is easily understood that if the glass material is pressed to the extent that the desired glass shape can be obtained with the weight of the upper die or the spring biasing force applied, then the glass material can be cooled thereafter.

At this time, the temperature of the glass material is lowered to the glass transition point by the upper heater block and the lower heater block, and then the upper heater block is pressed by the pressing machine and the upper mold is pushed down to cool the glass material. The shrinkage ratio of the glass material does not become large, and the precision transfer of the glass material to the desired glass shape can be precisely performed, and the yield can be improved.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an enlarged view and a sectional view of a cylinder head of a glass molding machine in this embodiment, and FIG. 2 is a sectional view of the glass molding machine.

As shown in FIGS. 1 and 2, the glass forming machine includes a pressing machine 10 such as a cylinder and a cylinder head 1.
8 and a plurality. Each cylinder head 18 is a pressing machine 1.
0, and an upper heater block 12 having an upper heater 11, an upper die 13 pressed by the upper heater block 12, a lower die 14 corresponding to the upper die 13, and a lower die. Supports mold 14 and lower heater 15
The upper heater block 12 is provided with a lower heater block 16 and a barrel die 17 provided on both side surfaces of the upper die 13 and the lower die 14.
3 is a configuration in which the push pin 20 that fits into the hole 21 provided in the upper heater block 12 is provided on the upper surface of the upper mold 13. A biasing spring 22 is provided between the bottom of the hole 21 and the push pin 20.

In the molding method, in the first step, the upper heater block 12 is pressed by a pressing machine 10 such as a cylinder, and the upper mold 13 is pressed down to the extent of coming into contact with the glass material 19. In the second step, the glass material 19 is kept in balance by the upper heater block 12 under a pressure of 4 kg / cm ² or less, and the glass material 19 is heated to the glass deformation point by the heaters of the upper heater block 12 and the lower heater block 16. Raise the temperature. Near the glass deformation point, the glass material 19 is pressed by the own weight of the upper mold 13 and the urging force of the spring 22. At this time, the pushing amount T pushed by the own weight of the upper die 13 and the biasing force of the spring 22 can be adjusted by the stopper 23, and the pushing amount H remains. In the third step, the temperature of the glass material 19 is lowered to the glass transition point by the heaters of the upper heater block 12 and the lower heater block 16, the upper heater block 12 is pressed by the pressing machine 10, and the extrusion pin 2
This is a method of finally pressing the remaining amount H of the glass material 19 in a few seconds by the upper mold 13 through 0 to finally form the glass material 19.

The operation will be described below. The upper heater block 12 has a hole 21 on the bottom surface thereof, and the upper die 13 has a push pin 20 fitted on the hole 21 provided on the upper heater block 12 on the upper surface of the upper die 13. As a result, if the temperature of the upper heater block 12 and the lower heater block 16 is raised to near the glass sag point, the upper mold 1 is softened with the softening of the glass material 19.
The glass material 19 is pressed by its own weight of 3 and the urging force of the spring 22, and the upper mold 13 is automatically lowered until the internal pressure of the glass material 19 is balanced with the own weight of the upper mold 13 and the urging force of the spring 22. As a result, it can be easily and accurately determined that the temperature of the glass material 19 has risen to the glass deformation point, and the actual temperature of the glass material 19 and the temperature displayed by the temperature detection values of the upper heater block 12 and the lower heater block 16 can be detected. There is no need to consider the difference between. That is, it is easily understood that if the glass material 19 is pressed by the amount of extrusion T capable of obtaining a desired glass shape by the weight of the upper mold 13, the glass material 19 may be cooled thereafter.

At this time, the temperature of the glass material 19 is lowered to the glass transition point by the upper heater block 12 and the lower heater block 16, and then the upper heater block is pressed by the pressing machine and the upper mold 13 is pushed down to cool. In this case, the shrinkage rate of the glass material 19 does not increase, and precise transfer for precisely transferring the glass material 19 to a desired glass shape can be performed to improve the yield.

As described above, according to this embodiment, since the glass molding machine of the mold moving type is used, the process is divided by each cylinder head 18 to perform glass molding, so that mass productivity can be improved.

The upper heater block 12 and the lower heater block 16 raise the temperature of the glass material 19 to the sag point of the glass, and the weight of the upper mold 13 and the spring 2 are increased.
After the glass material 19 is pressed by the urging force of 2, the glass material 19 is lowered to the transition point of the glass, the upper heater block 12 is pressed by the pressing machine 10 and the upper mold 13 is pressed down, and the glass material 19 is moved to the desired glass. It is possible to perform precise transfer that precisely transfers to a shape, and it is possible to improve the yield.

[0024]

As described above, according to the present invention, since the glass molding machine of the mold moving system is used, the process is divided by each cylinder head to perform glass molding, so that mass productivity can be improved.

Further, the temperature of the glass material is raised to the sag point of the glass by the upper heater block and the lower heater block, and after the glass material is pressed by the upper die, the temperature is lowered to the transition point of the glass, and the pressing machine is pressed. Thus, by pressing the upper heater block and pressing down the upper mold, it is possible to perform precise transfer in which the glass material is precisely transferred to a desired glass shape, and the yield can be improved.

[Brief description of drawings]

FIG. 1 is a sectional view of a cylinder head of a glass forming machine according to the present invention.

FIG. 2 is a front view of the glass forming machine.

FIG. 3 is a sectional view of a cylinder head in a conventional glass molding machine.

[Explanation of symbols]

 11 Upper Heater 12 Upper Heater Block 13 Upper Mold 14 Lower Mold 15 Lower Heater 16 Lower Heater Block 17 Body Mold 18 Cylinder Head 19 Glass Material 20 Extrusion Pin 21 Hole

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hideki Taketani 55-12, Ozumi, Osamu, Tanabe-cho, Tsuzuki-gun, Kyoto Prefecture Matsushita Nitto Electric Co., Ltd.

Claims (2)

[Claims] 1. An upper heater block provided with a heater, an upper die pressed by the upper heater block, a lower die corresponding to the upper die, a lower die supporting the lower die, and a heater. The upper heater block has a hole on the bottom surface, and the upper die has an extrusion pin fitted on the hole provided on the upper heater block on the upper surface of the upper die. Glass forming machine. 2. An upper heater block provided with a heater, an upper die pressed by the upper heater block, a lower die corresponding to the upper die, and a heater supporting the lower die and having a heater. The upper heater block has a hole on the bottom surface, and the upper die has an extrusion pin fitted on the hole provided on the upper heater block on the upper surface of the upper die. In the glass molding machine, the first step of pressing the upper heater block by the pressing machine and pushing down the upper mold to the extent of contacting the glass material, and raising the temperature to the glass deformation point by the heaters of the upper heater block and the lower heater block , The second step of pressing the glass material with the upper mold, and the temperature of the glass transition point by the heaters of the upper and lower heater blocks. A glass molding method including a third step of lowering, pressing the upper heater block with a pressing machine, and pressing down the upper mold to mold the glass material.