JPH0597445A - Molding device for glass ware with leg - Google Patents

Abstract

PURPOSE:To prevent the generation of a failure or bleeding out in the joint part of hollow glass and a leg part at the time of molding the leg part even if the axial centers of a blowing tube and the hollow glass are mis-aligned with the device for molding the glass ware with the leg by mounting the leg part to the hollow glass blow-molded by the blowing tube. CONSTITUTION:The blowing tube 31 is fixed by an upper fixture 29 and a lower fixture 29'. The upper fixture 29 is so fixed as to allow the inclination of the blowing tube 31 coaxially with the axial center of a metallic mold 1 and the lower fixture 29' is so fixed as to allow the inclination of the blowing tube 31 in transverse and longitudinal directions.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding device for glassware with legs, and hollow glass is molded by an artificial blow molding method using a blowing rod, and the hollow glass is fixed to the hollow glass in a fixed state. The present invention relates to a molding device for a glassware with a leg, in which a portion is press-molded.

[0002]

2. Description of the Related Art Conventionally, as a method of forming a glassware with legs by artificial blowing, first, hollow glass is blow blow molded in a molding die with a blowing rod, and the hollow glass is still attached to the tip of the blowing rod. The lower part of the above is fitted into a concave opening provided on the upper part of the leg forming mold and conforming to the outer shape of the bottom of the hollow glass, and the blowing rod is set perpendicular to the column and fixed by a gripping tool. That is, when the hollow glass is fitted in the concave opening, the hollow glass is firmly fitted and held without displacement.

The recessed opening communicates with the lower end of the mold by a cavity for the leg, and molten glass is pressed into the cavity for the leg by a predetermined amount from below the opening at the lower end of the mold for the leg. Introduced into the hollow glass, the legs having the desired shape are formed and, at the same time, the upper ends of the legs are welded to the lower part of the hollow glass. After that, another molten glass is attached to the lower ends of the legs by a conventional method to form a stand.

As another method, there is a method in which the legs and the base are press-fitted at once with a die, and then the base is reheated to be softened and then spread into a desired shape with a tool.

In the above steps, there are many cases in which a very slight discrepancy occurs in the central axes of the hollow glass formed by the blowing rod and the blowing rod and the hollow glass (hereinafter referred to as the first eccentricity).

On the other hand, when press-fitting the legs, the hollow glass at the tip of the blowing rod is fitted into the recess opening in the upper portion of the leg-forming die without removing the first eccentricity, and blown. When the rod is fixed vertically to the supporting tool of the column, it is originally desirable that the hollow glass and the leg part are on the same axis in the glassware with legs, so the position of the holding tool of the blowing rod is also designed on the premise. Therefore, even if the first eccentricity is small, an unreasonable force is applied to the portion of the hollow glass that comes into contact with the mold, and stress is generated.

When the legs are press-molded as they are, the stress is released when the molded product is taken out of the mold, but instead a small crack called a crack is generated at the joint, which is caused by a light shock received during handling. There was a problem that cracks progressed from the portion and were peeled off from the joint, or the molten glass bited into the gap between the mold and the hollow glass that was formed in the fitting portion, so-called protrusion.

[0008]

SUMMARY OF THE INVENTION An object of the present invention is to form a leg portion of a glassware with a leg by press-fitting and molding the leg portion with a mold to the lower portion of the hollow glass that is still attached to the tip of the blowing rod. In doing so, if the axis of the blowing rod and the hollow glass remains eccentric, the legs welded to the hollow glass by press-fitting may break off from the joint or the protruding molten glass may adhere to the outer periphery of the hollow glass. ..

An object of the present invention is to prevent unreasonable stress from being applied to a blowing rod in a state in which the tip of the hollow glass is accurately fitted to the center of the recess opening in the upper part of the leg molding die. An object of the present invention is to provide a molding device for a glass instrument in which the axis of the leg can be aligned with the center of the distal end of the hollow glass very easily by firmly fixing it in this state.

[0010]

The means for achieving the object of the present invention are to fit a hollow glass blow-molded by a blowing rod downward and to fit it into a recess opening in the upper part of the leg-forming mold. , In a state where the blowing rod is gripped and fixed by the gripping means,
In a molding apparatus for a glassware with legs, in which molten glass is pressed into the mold from below to mold the legs, and at the same time, the holding means is provided on the upper part of the mold for molding the legs. And a first blowing rod fixing device that is spaced apart above and below,
It comprises a first blowing rod fixing device and a second blowing rod fixing device arranged between the mold, and the first blowing rod fixing device is coaxial with the center of the mold. It has a blowing rod fixing part which holds and fixes the inclination of the blowing rod, and the second blowing rod fixing device allows the inclination of the blowing rod between the first blowing rod fixing device and the hollow glass. It is characterized by having a blowing rod fixing portion which limits only the movement in the axial direction.

[0011]

1 is a side view of an embodiment of a molding apparatus for glassware with legs according to the present invention.

Reference numeral 1 denotes a leg mold of a glassware with legs, which is a split mold, and has a leg cavity 2 having a desired shape or pattern, a hollow glass receiving concave opening 3 connected to the upper portion thereof, and an upright state from an apparatus body 4. The split mold is supported by the pillar 5
It can be opened and closed by a handle 6 having.

Reference numeral 8 denotes a cutting die, which is a split die, and includes a step portion 9 provided at a lower portion of the leg die 1 and a molten glass material receiver 10.
The upper and lower portions of the leg are sandwiched and supported, and the handle 5 having the retainer 12 is axially fixed to the column 5 at a height at which the cloth receiver 10 can be freely inserted from below. It can be opened and closed separately.

The cloth receiver 10 has a cavity having an open shape at the upper part capable of accommodating a slightly larger amount of cloth than the molten glass cloth for the legs, and a guide tool 13 is provided on the lift table 14 to form the leg mold 1. Is supported concentrically with. The lift 14 has a brim 1 at the top.
5, and is supported by the main body 4 so as to be vertically slidable.

The plunger 16 is fixed to the shaft of an air cylinder (not shown) fixed to the main body 4, and the lift 1
Slide the center of 4 up and down.

An upper fixing member 29 composed of a tongue 8 and the like is fixed to the upper portion of the column 5, and the tongue 8 is biased by a spring in a closing direction so that the upper portion of the blowing rod 31 can be gripped. It is pushed against the spring force and firmly gripped according to the angle of the blowing rod.

As shown in FIG. 5, the inner surface of the tongue 8 of the upper fixing member 29 is formed in a V-shaped plane so as to face each other to form an opening, and the blowing rod is positioned between them. And the V-shaped surface is
As shown in FIG. 6, the cross section is formed in a semi-circular shape so that the blowing rod can be held in a point contact state at four points.

Therefore, the grasped blow rod 31 is grasped and fixed in such a manner that it can be displaced in any direction around the contact point with the tongue 8. The center of gripping of the blowing rod 31 by the tongue 8 is located coaxially with the center of the plunger 16 described later.

FIG. 2 shows a lower fixing device 29 'of the blowing rod,
An air chuck 36 having a tongue 8 ′ that horizontally opens and closes forward is projected from the air chuck 34, which is fixed to the support 5 via a fixing tool 32, to a rotatable rotary shaft 3 in the air brake 34 through an angle 35. The air chuck 36 and the tongue 8 ′ are fixed and can swing about the rotation shaft 33. Moreover, after the tongue 8 ′ is closed to hold the blowing rod 31 by the compressed air being fed into the air chuck 36, the compressed air is fed into the air brake 34 at that position with a slight delay, and the rotary shaft is rotated. Since the rotation of 33 is stopped, the swing of the air chuck 36 and the tongue 8 ′ is stopped, and the blowing rod 31 can be gripped and fixed at that position as shown in FIG.

The series of operations is preset by a sequencer (not shown). And tongs 8 '
As shown in FIGS. 8 and 9, since the inner surfaces of the blower rods face each other in a semi-cylindrical shape, the inclination of the blowing rod 31 in the front-rear direction can be absorbed, while the inclination of the left and right sides of the air chuck 36 is
It can be absorbed by the horizontal swinging.

That is, the tongue 8'is the air chuck 36.
Is operated to close according to the position of the blowing rod 1 and grip at that position even if the position or angle of the blowing rod 31 changes.
It can be fixed.

Next, the operation of the apparatus having the above configuration will be described.

Even when the hollow glass 30 and the blowing rod 31 are formed with eccentric shafts as shown in FIG. 4, the hollow glass 30 is first attached to the blowing rod 31 as in the conventional method. Insert the lower fixing tool 29 'between the open tongues 8'while keeping the upper part of the blowing rod 1 held by the tongue 8 of the upper fixing tool 29, and make the recess opening 3 of the leg mold 1 open. Fit the center of the hollow glass with the center of the tip of the glass.

In this case, the gripping center of the tongue 8 of the upper fixture 29 coincides with the center of the mold 1 in the vertical direction, but since the tongue 8 can grip the blowing rod 31 in any direction, Even if the axes of the blowing rod 31 and the hollow glass do not coincide with each other and the blowing rod 31 is slightly tilted, the tilting is allowed by allowing this inclination.
Will be gripped and fixed.

Therefore, the tongue 8'of the lower fixture 29 'is
On the other hand, although the blowing rod 31 is in an inclined state, this direction is not always uniform, but the lower fixing tool 29 'is grasped without giving stress to the blowing rod 31 according to the inclination as described below. It

Next, the air chuck 36 of the lower fixture 29 'is operated to close the tongue 8', and the air brake 34 is operated slightly later than this to operate the air brake 34 to rotate the rotary shaft 33.
Stop the rotation of.

Even if the position of the blowing rod has an angle with respect to the vertical due to the deviation of the axis as described above and is deviated, it is still held and fixed at that position. That is, the deviation of the blowing rod is maximum at the position of the lower fixing tool 29 ', and the deviation there is horizontal swinging around the rotation axis 33 of the lower fixing tool 29' and the length of the tongue 8 '. Absorb with to grasp and fix.
Since the upper fixture 29 is located on the center line of the leg die 1, and the inner surfaces of the tongues 8 are in the shape of a squirrel and face each other, the upper fixture 29 can be gripped regardless of the inclination of the blowing rod 31.

Next, the molten glass for the legs is put in the cloth receiver 10 on the main body 4 and slid on the main body 4, and the v-shaped portion of the guide 13 is used as a guide to match with the center of the leg mold 1. Then, it is positioned below the leg mold 1.

Next, the elevating table 14 ascends together with the plunger 16, and the upper end of the cloth receiver 10 is pressed against the lower surface of the cutting part die 8. Next, if only the plunger 16 is raised, the molten glass inserted in the material receiver 10 is press-fitted into the cavity 2 of the leg mold and welded to the lower portion of the hollow glass 30.

After that, the elevator 14 and the plunger 16
Is returned to the state at the start of the work, the cutting part die 8 is opened, the glass hanging down to that part is cut, and the surplus glass remaining in the cloth receiver 10 is removed. Next, the leg mold 1 is opened, the upper and lower fixtures 29, 29 ′ are released from the gripped state, and the molded product is taken out together with the blowing rod 31. For the molded product in which the legs are welded to the lower part of the hollow glass, the base is molded in the next step using the blowing rod 31 in the same manner as general artificial blowing.

[0031]

As described above, according to the present invention,
Even if the axis of the blow rod and the hollow glass are eccentric, it can be easily molded so that the center of the tip of the hollow glass and the axis of the leg match, so damage or protrusion at the joint or the leg of the hollow glass It is possible to eliminate the production of so-called off-center molded articles that are welded off the center and to improve production efficiency.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a molding apparatus for glassware with legs according to the present invention.

2 is an enlarged side view of the lower fixture of FIG.

3 is a sectional view taken along line 3-3 of FIG.

FIG. 4 is a view showing a state in which a hollow glass and a shaft of a blowing rod are eccentrically formed.

5 is a plan view of the tongue of the upper fixture of FIG.

6 is a side view taken along line 5-5 of FIG.

FIG. 7 is a side view of the air chuck and tongs of the lower fixture.

FIG. 8 is a plan view of the air chuck and tongs of the lower fixture.

FIG. 9 is a front view of the air chuck and tongue of the lower fixture.

[Explanation of sign]

 DESCRIPTION OF SYMBOLS 1 ... Mold for legs 2 ... Cavity for legs 3 ... Recessed opening 5 ... Struts 8, 8 '... Tongs 10 ... Fabric receiver 14 ... Elevating table 16 ... Plunger-29 ... Upper fixing tool 29' ... Lower fixing tool 30 ... Hollow glass 31 ... Blowing rod 33 ... Rotating shaft 34 ... Air brake 35 ... Angle 36 ... Air chuck

Claims (1)

[Claims] 1. A hollow glass blow-molded by a blowing rod is faced downward to be fitted into a recess opening in an upper portion of a leg molding die, and the blowing rod is held and fixed by a holding means.
In a molding apparatus for a glassware with legs, in which molten glass is pressed into the mold from below to mold the legs, and at the same time, the holding means is provided on the upper part of the mold for molding the legs. And a second blowing rod fixing device arranged between the first blowing rod fixing device and the mold, the first blowing rod fixing device being spaced apart from each other, and the first blowing rod fixing device arranged between the first blowing rod fixing device and the mold. The first blowing rod fixing device has a blowing rod fixing portion that coaxially and coaxially with the center of the mold and holds and fixes the inclination of the blowing rod, and the second blowing rod fixing device is the first blowing rod fixing device. A device for forming a glassware with a leg, comprising: a blowing rod fixing portion which allows an inclination of the blowing rod between the rod fixing tool and the hollow glass and limits only the axial movement thereof.