JP2002145632A - Turntable of glass product forming machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve product quality and to assure the adequate operation of equipment by solving the problem of a level fluctuation of forming dies by thermal deformation of a turntable. SOLUTION: Upper disks 7 and lower disks 1 are formed like separately constituted sheet disks and the lower disks 1 which are the main bodies of the turntable 11 are formed like thick disks, by which the outer peripheral parts of the lower disk 1 are prevented from sagging downward by a difference in the coefficients of thermal expansion between the upper and lower disks 7 even if the upper disks 7 rise to a temperature higher than that of the lower disks 1 because the upper and lower disks 7 and 1 are separately constituted and the rigidity of the lower disks 1 is higher. Respective forming dies 12 are securely supported by annular ribs 4 erected integrally on the lower disks 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turntable for a glass product forming machine for forming panels, funnels and the like for cathode ray tubes.

[0002]

2. Description of the Related Art As a glass product forming machine of this kind, a plurality of forming dies are arranged at equal intervals on the outer periphery of a turntable which rotates intermittently, and each forming die is formed by intermittent rotation of the turntable to form molten glass. 2. Description of the Related Art A molding machine that sequentially feeds a plurality of stations including various processes such as supply to a mold, press molding by a plunger, and removal of a molded product has been used.

FIG. 4A conceptually shows a press station in such a molding machine. On the outer peripheral portion of the turntable 11, a plurality of, for example, eleven molding dies (female dies) 12 are arranged at equal intervals as shown in FIG. It is fixed to. The turntable 11 is intermittently driven at predetermined pitches by an appropriate index mechanism (not shown), whereby each mold 12 is sequentially fed to a plurality of stations S1 to S11 which perform a series of molding steps.
When the molding die 12 supplied with the molten glass at the supply station S1 is sent to the press station S3 shown in FIG. 1, first, the anvil device 14 disposed below the turntable 11 is operated, and the turntable 11 is turned. The table 11 is supported from below, and then, for example, a plunger (male type) 16 driven up and down by a ram cylinder 15 descends,
The molten glass is pressed into a predetermined shape by the molding die 12 and the plunger 16, then cooled to a state where it can be taken out through a plurality of stations, and is taken out from the product taking out station S8. The anvil device 14 moves the wedge 14a to move the support member 14b up and down, thereby moving the molding die 1 sent to the press station S3.
2 is supported from below, and the amount of movement of the wedge 14a can be adjusted by an adjusting screw 14c. Further, the conventional turntable 11 has a thick lower disk a and an upper disk b.
Are integrally formed into a hollow disk shape, and the internal space is used as a cooling air passage c, and cooling air is supplied from the inlet d to the cooling air passage c to form a glass product after press molding into a molding die. The partition wall e for dividing the cooling air passage c for each molding die 12 and a rib f as appropriate are arranged between the upper and lower disks a and b.

[0004]

Generally, in such a glassware forming machine, a heat source is located above a turntable 11 and is constantly receiving the radiant heat thereof. Mold 12
The upper disk b of the turntable 11 also has a considerably high temperature due to the heat transfer from the lower disk a.
This temperature difference causes a difference in the amount of thermal displacement between the upper disk b and the lower disk a of the turntable 11, and as shown by the broken line in FIG. Although it hangs down slightly, the turntable 11
(The amount of deformation is exaggerated).

[0005] Due to such a change in the upper surface level, the central axis of the mold 12 is inclined. As a result, the relative position between the molding die 12 and the plunger 16 is deviated from the normal position, thereby causing rubbing between the molding die 12 and the plunger 16, a change in the thickness of the molded glass product, and variation in dimensions. Invite. If the turntable 11 is significantly deformed, the anvil device 14 may not be able to operate.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the problem of the level change of the molding die due to the thermal deformation of the turntable, improve the product quality, and ensure the proper operation of the device. Things.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is directed to an intermittently rotating turntable in which a plurality of molds are arranged at equal intervals on an outer peripheral portion, and each mold is intermittently rotated. In a turntable of a glassware forming machine that sequentially feeds to a plurality of stations including various processes such as supply of a molten glass to a forming die, press forming by a plunger, and removal of a formed product, a thick plate serving as a main body of the turntable -Shaped lower disk, an outer peripheral flange portion erected annularly along the upper outer peripheral edge of the lower disk, and an inner peripheral flange erected annularly along the upper inner peripheral edge of the lower disk Part, a plurality of annular ribs erected at equal intervals on the upper surface of the outer peripheral part of the lower disk for mounting and fixing the forming die via a receiving table, the outer peripheral edge flange part and the inner peripheral edge Each between the flange A partition wall radially erected on the upper surface of the lower disk to define a cooling air passage for each of the ribs, and a partition wall erected on the upper surface of the lower disk to reinforce each annular rib. A central disk, a thin disk-shaped member having a separate structure from the lower disk fixed to the upper surface between the outer peripheral flange portion and the inner peripheral flange portion to cover the upper surface of the cooling air passage. A turntable is constituted by the upper disk.

According to the present invention, as described above, the upper disk receiving the radiant heat from the upper heat source and the conductive heat from each mold is formed into a thin disk having a structure separate from the lower disk, and the main body of the turntable is provided. By making the lower disk to be a thick disk, the upper and lower disks are separate and the lower disk has high rigidity even if the upper disk is hotter than the lower disk. Further, it is possible to prevent the outer peripheral portion of the lower disk from hanging down due to the difference in thermal expansion between the upper and lower disks. Therefore, fluctuation of the upper surface level of the turntable is prevented, the relational position between the mold and the plunger can be held at a regular position, the operation and the molding operation of the anvil device are stabilized, and the thickness of the glass product to be molded is reduced. High quality products with constant thickness and dimensions can be formed. Further, by making the upper disk thinner, the weight of the entire turntable can be reduced, and the power can be reduced.

Further, by disposing a heat insulating cover on the upper disk, it is possible to suppress an increase in the temperature of the upper disk, thereby reducing a temperature difference between the upper and lower disks.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an enlarged perspective view of a main part of the turntable according to the present invention with an upper disk removed, and FIG.
3 is a central longitudinal sectional view of FIG.

1 to 3, 1 is a lower disk, 2 is an outer peripheral flange, 3 is an inner peripheral flange, 4 is an annular rib, 5 is a partition wall, 6 is a central rib, 7 is an upper disk. , 8 indicate a heat insulating cover.

The lower disk 1 is a main component of the turntable 11, and is formed in a thick disk shape by casting or other suitable metal material. The outer peripheral edge flange portion 2 is erected in an annular shape along the outer peripheral edge of the upper surface of the lower disk 1 and is manufactured integrally with the lower disk 1. The inner peripheral flange 3 is
As shown in FIG. 2 and FIG. 3, the lower disk 1 is annularly erected along the inner peripheral edge of the upper surface, and is manufactured integrally with the lower disk 1. The annular rib 4 receives the mold 12 (see FIG. 4)
The lower disk 1 is mounted on the upper surface of the outer peripheral portion of the lower disk 1 at regular intervals so as to be placed and fixed therethrough, and is integrated with the lower disk 1 in a continuous state with the outer peripheral flange portion 2 as shown in FIG. It is manufactured in. As shown in FIG. 2, the partition wall 5 is used to partition the cooling air passages 9 between the outer peripheral flange portion 2 and the inner peripheral edge flange portion 3 at equal intervals for each annular rib 4 in a fan shape. It is erected radially on the upper surface of the lower disk 1 and is manufactured integrally with the lower disk 1. The central rib 6 is integrally erected on the upper surface of the lower disk 1 to reinforce each annular rib 4,
As shown in FIG. 2, the cooling air passage 9 is
At the center of the lower disk 1.

The annular rib 4, the partition wall 5, and the central rib 6 are formed in series at the same height as the outer peripheral flange 2 of the lower disk 1. As shown in FIGS. 2 and 3, a short apron portion 10 extends in a series from the inner peripheral flange portion 3 toward the outer peripheral direction on the upper portion of the inner peripheral flange portion 3.

The upper disk 7 is fixed to the upper surface between the outer peripheral flange 2 and the apron portion 10 of the inner peripheral flange 3 so as to cover the upper surface of the cooling air passage 9. The lower disk 1 is formed separately from the lower disk 1 and is formed in a thin disk shape, and has a hole (not shown) having substantially the same shape as the center hole 4a at a position coinciding with the center hole 4a of the annular rib 4. ) Are formed at equal intervals on the outer peripheral portion.

As shown in FIG. 3, the heat insulating cover 8 is attached to the upper portion of the upper disk 7 and is a thin plate made of a material having good heat reflectivity, such as a stainless steel plate, similar to the upper disk 7. Manufactured in shape and mounted.

As shown in FIG. 2 and FIG. 3, the cooling air passage 9 has an inlet 9a formed separately in the apron portion 10, and an outlet 9b formed in a lower circular portion in the center hole 4a of the annular rib 4. A hollow is formed in the plate 1, and around the annular rib 4,
A plurality of window holes 9c are formed. Cooling air is appropriately supplied to the inlet 9a of the cooling air passage 9 from cooling air supply means (not shown) provided on the turntable 11 (for example, at least the first air in FIG. 4B). No cooling air is supplied to the first station S1 and the third station S3).

The turntable 11 of the present invention has the above-described structure. The mold 12 is positioned and fixed to the center hole 4a of each annular rib 4 via the receiving base 13, and is rotated and driven in the same manner as in the prior art. Then, at a first station S1 shown in FIG. 4B, the molten glass is supplied into the molding die 12, and at a third station S3, the plunger is backed up by operating the anvil device 14 from below. The glass product is formed by the descent of 16 and then cooled at a plurality of stations and taken out from the eighth station S8. More specifically, the turntable 11 is intermittently driven by two pitches, the molten glass is supplied in the first station S1, and the third station S
3, the fifth station S5, the seventh station S7, the ninth station S9, the eleventh station S
11, the second station S2, the fourth station S4,
It is cooled sequentially at the sixth station S6 and taken out from the eighth station S8.

[0018]

According to the present invention, the upper disk receiving the radiant heat from the upper heat source and the conductive heat from each mold is formed into a thin disk having a structure separate from the lower disk, and the main body of the turntable is provided. By making the lower disk to be a thick disk, the upper and lower disks are separate and the lower disk has high rigidity even if the upper disk is hotter than the lower disk. Further, it is possible to prevent the outer peripheral portion of the lower disk from hanging down due to the difference in thermal expansion between the upper and lower disks. Therefore, fluctuation of the upper surface level of the turntable is prevented, the relational position between the mold and the plunger can be held at a regular position, the operation and the molding operation of the anvil device are stabilized, and the thickness of the glass product to be molded is reduced. High quality products with constant thickness and dimensions can be formed. Further, by making the upper disk thinner, the weight of the entire turntable can be reduced, and the power can be reduced.

Further, by disposing a heat insulating cover on the upper disk, it is possible to suppress an increase in the temperature of the upper disk, thereby reducing a temperature difference between the upper and lower disks.

[Brief description of the drawings]

FIG. 1 is an enlarged perspective view of a main part of a turntable according to the present invention.

FIG. 2 is a plan view of FIG. 1;

FIG. 3 is a central vertical sectional view of FIG. 2;

FIG. 4A is a conceptual view including a conventional turntable at a press station of a molding machine, and FIG. 4B is a plan view showing an example of an arrangement of each process of the molding machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lower disk 2 Outer edge flange part 3 Inner edge flange part 4 Annular rib 4a Center hole part 5 Partition wall 6 Central rib 7 Upper disk 8 Heat insulation cover 9 Cooling air passage 9a Inlet 9b Exit 9c Window hole 10 Apron part 11 Turntable 12 Mold 13 Cradle 14 Anvil device 15 Ram cylinder 16 Plunger

Claims (2)

[Claims] A plurality of forming dies are arranged at equal intervals on an outer peripheral portion of an intermittently rotating turntable, and each of the forming dies is intermittently rotated by a turntable to supply molten glass to the forming die and press-mold by a plunger. In a turntable of a glass product forming machine which sequentially feeds to a plurality of stations including various processes such as removal of a molded product, a thick disk-shaped lower disk serving as a main body of the turntable, and an outer peripheral edge of an upper surface of the lower disk An outer peripheral flange portion provided in an annular shape along the inner peripheral edge portion, an inner peripheral edge flange portion provided in an annular shape along the inner peripheral edge of the upper surface of the lower disk, and the mold is placed and fixed via a receiving table. A plurality of annular ribs erected at equal intervals on the upper surface of the outer peripheral portion of the lower disk, and a cooling air passage for each annular rib between the outer peripheral flange portion and the inner peripheral flange portion. The compartment to form the said A partition wall erected radially on the upper surface of the lower disk, a central rib erected on the upper surface of the lower disk to reinforce each annular rib, the outer peripheral edge flange portion and the inner peripheral edge flange portion, A glass plate comprising: a lower disk fixed to cover an upper surface of the cooling air passage on an upper surface between the lower disk and an upper disk in the form of a thin disk separate from the lower disk. Product molding machine turntable. 2. The turntable according to claim 1, wherein a heat insulating cover is disposed on the upper disk.