JPH0144648B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method and apparatus for manufacturing glass products, particularly panels or funnels for cathode ray tubes.

Conventional technology Conventionally, a predetermined number of molds are arranged at equal intervals around the periphery of a table that rotates intermittently, and when the table stops rotating intermittently, gobs (molten glass lumps) are sent from a gob feeder.
A method for manufacturing a glass product is known, in which glass products are fed and pressed using one plunger.

When it is desired to improve the productivity of glass products using the above method, it is conceivable to shorten the table stop time, including the press molding time by the plunger, and increase the molding speed overall.

However, shortening the press molding time deteriorates the molding precision of glass products, and as a result, it is difficult to significantly improve productivity.

Glass products such as cathode ray tube panels and funnels have complex shapes and are required to have high dimensional accuracy, so it is necessary to sufficiently lengthen the press forming time using a plunger. has restrictions.

Problems to be Solved by the Invention Conventionally, there was a problem in that productivity could not be improved because it was difficult to shorten the press molding time.To solve this problem, a press mechanism for press molding and a gob It is conceivable to equip one table with multiple sets of gob supply mechanisms, but if the glass product is a cathode ray tube panel or funnel, the gob supply mechanism must be installed directly above the mold to avoid chute marks. However, it is considered difficult to provide multiple sets of gob supply mechanisms at the same spacing as the molds due to space constraints, and has not been put to practical use.

In order to make it possible to manufacture products of different sizes, various molds can be exchanged and mounted on the table, but in that case, it is necessary to adjust the drop point of the gob to each size mold. Conventionally, an adjusting machine for this purpose was attached to the gob supply mechanism, which resulted in an increase in the size of the gob supply mechanism.

Means for Solving the Problems The present invention aims to provide a method and apparatus for manufacturing glass products that solves the above-mentioned problems of the prior art. Adjustment means for arranging a large number of molds each consisting of a plurality of blocks, one block being a plurality of molds, at equal intervals, and setting the falling point of the gob relative to one block of molds at the gob supply position. The process includes the step of simultaneously supplying gobs to each of the plurality of molds of one block during the stop period of the intermittent rotation of the table; It consists of a process of press molding multiple glass products in one block. In this case, multiple molds arranged in each block can be arranged parallel to the center line of the table for each block. It is preferable.

In addition, the device invention includes a table on which a large number of molds are arranged at equal intervals around the periphery, a drive mechanism for intermittent rotation that feeds a plurality of molds block by block, and a drive mechanism that feeds a plurality of molds block by block during the stop period of the intermittent rotation. It consists of a supply mechanism that simultaneously drops and supplies gobs to each mold, and a press mechanism that press-forms one block of glass products at a time using multiple sets of plungers at a press position. It is preferable that the plurality of molds arranged in each block are arranged parallel to the center line of the table for each block, and that the table includes an adjusting mechanism for controlling the drop point of the gob.

Effects The present invention is capable of simultaneously supplying gobs to a plurality of molds in one block and performing press molding at the same time, setting the intermittent feed pitch of the table to the same pitch every time, and stopping the intermittent feed. The time required for press molding one glass product, that is, the same time, can be set, and productivity can be improved multiple times compared to the conventional method of molding one glass product at a time.
It is also possible to manufacture products of different sizes, and this can be done easily.

Embodiment FIG. 1 is a plan view of essential parts showing an embodiment of the present invention, where T is a table, M is a mold, G is a gob supply mechanism, and P is a press mechanism for press-molding glass products.

The gob supply mechanism G has a plurality of sets (the drawing shows an example of two sets) fixedly installed in a fixed position, and the installation interval of each set is the installation interval of the molds M arranged around the table T. The molds M are arranged in the same manner and are configured to supply gobs to a plurality of molds M at the same time.

The same number of press mechanisms P as the gob supply mechanism G (two sets in the drawing) are installed in series at the same interval as the installation interval of the molds M arranged around the table T, and moreover, The gob is configured to press-form.

A large number of molds M are installed at equal intervals around the table T, and the table T has an arrangement pitch of the same number of molds M as the number of gob supply mechanisms G and press mechanisms P installed (two sets in the drawing). The gob is rotated intermittently in units of one block, and the stop time of this intermittent rotation is the time required for pressing the gob in the mold M by the press mechanism P. In addition, the time required for press molding of the gob in the mold M means that the glass temperature of the contact boundary part of the glass product in the mold M that is press molded by the press mechanism P and is in contact with the press mechanism P is below the adhesive temperature. This is the time required for the glass product to reach a state where it does not deform inside the mold M.This time is determined empirically depending on the shape and dimensions (size, wall thickness, etc.) and material of the glass product. It's what's needed.

Normally, in the molding of glass products, the gob supply process, press process, glass product cooling process, and glass product removal process are associated with the stop station of table T. A plurality of molds M for four blocks or more corresponding to the four steps described above are arranged at equal intervals.

The molds M arranged for each block are arranged parallel to the center line O of the table T.

The general planar shape of a mold M for forming a cathode ray tube panel or funnel is approximately rectangular as shown in Figure 2.
The dimensions of the gob g supplied in the
It is necessary to adjust the position in the X and Y directions. In other words, the center position of the mold M of each size is set at a fixed position on the table T, but the directions of the tip g' and rear end g'' of the gob g dropped and supplied into the mold M are always fixed. As shown in Fig. 2, the direction of the gob g is regulated during the fall so that it is horizontally elongated in the X direction.Therefore, the falling point of the gob g is not at the center of the mold M;
The position is eccentric in the XY direction, and the amount of eccentricity is
When the size of the mold M changes, the drop point of the gob g changes for each size.
It is necessary to adjust the position in the XY directions.

In the present invention, the gob supply mechanism G is fixed and the mold M on the table T is adjustable in position, but adjusting the position of each mold M with respect to the table T is extremely complicated structurally. At the same time, the position adjustment work also takes a long time and becomes cumbersome, so the entire table T can be moved and adjusted relative to the gob supply mechanism G.

Now, the number of molds M to be placed in one block is 2.
In the case of individual pieces, the molds M, M in each block
As shown in FIG. 3, the Y direction (or X direction) of the molds M and M are arranged parallel to the table center line O. Even if the number of molds M installed in one block increases, they are arranged in the same way. In FIG. 3, B indicates the boundary line of the block.

Now, to explain the case where the position of the drop point of the gob g is adjusted using Fig. 3, since the molds M and M of one block are arranged parallel to the table center line O, the position of the gob supply mechanism G , are arranged at the same interval as the installation interval of the molds M, M. Therefore, if the arrangement center of the gob supply mechanism G is aligned with the table center line O, the entire table T can be moved along the center line O. parallel direction and perpendicular direction, i.e. XY
This can be done by moving in the direction.

Therefore, the table T is installed on the floor F via an adjusting mechanism A as shown in FIGS. 4 and 5. That is, a first (Y direction) slide 2 is placed on a fixed base 1 so as to be slidable in the Y direction, and a second (X direction) slide 3 is placed thereon so as to be slidable in the X direction. A table T including an intermittent drive mechanism J is mounted on the second slide 3, and the first slide 2 has a first adjustment screw 5 with a handle screwed onto a bracket 4 supported on the fixed base 1. The second slide 3 is movable back and forth in the Y direction with respect to the fixed base 1, and the second slide 3 is moved by a second adjustment screw 7 with a handle screwed onto a bracket 6 supported on the first slide 2. The first slide 2 can be moved back and forth in the X direction, and can be locked at an adjusted position.Of course, it can be operated not only manually but also automatically by a motor or the like.

As for the mechanism of the gob supply mechanism G itself, a known device having a glass melting furnace, a metering mechanism, and a cutting mechanism can be applied. It's a good thing.

Further, the press mechanism P can also be a known device having a plunger and its driving cylinder, and a plurality of sets of these are arranged in series in accordance with the installation interval of the molds M on the table T, and the above-mentioned second What is necessary is to attach and support it on the slide 3.

The intermittent drive mechanism J of the table T employs a known means comprising, for example, a setting means such as a timer capable of changing the stop time of the intermittent drive, and an index drive servo mechanism capable of feedback control.

In the case of FIG. 1, the specific method for driving the table T is that a press mechanism P is installed in succession to the gob supply mechanism G, and the table T is rotated intermittently at an angle θ for each block. In the case of Fig. 6, the press mechanism P is separated by one block from the gob supply mechanism G.
Since it is set up, every other block, that is,
The glass products are rotated intermittently at an angle of 2θ every 2 blocks, and a cooling station and a take-out station are set accordingly, and the taken-out glass products are slowly cooled in an annealing furnace. Note that the arrangement examples of the gob supply mechanism G and the press mechanism P are not limited to those shown in FIGS. 1 and 6.

Effects of the Invention According to the present invention, it is sufficient to intermittently rotate the table at equal pitches for each block or multiple blocks, and the time from supplying gobs to press forming can be increased by increasing the number of molds installed in one block. However, all molds can be made the same, and multiple pieces can be produced under the same molding conditions, dramatically improving productivity without shortening the stop time of intermittent rotation of the table, that is, the press molding time. Can be done.

In addition, to adjust the position of the drop point of the gob when manufacturing glass products of different sizes, an adjusting mechanism is provided on the table side, and the molds for each block are arranged parallel to the center line of the table. As a result, the gob supply mechanism can be downsized and arranged at the same intervals as the molds on the table, and the table can be rotated intermittently at equal pitches and at equal time intervals. The drive control mechanism for intermittent rotation can be simplified, productivity can be improved, and the adjustment mechanism itself can be simplified, making position adjustment simple and easy.

[Brief explanation of drawings]

FIG. 1 is a plan view of essential parts showing an embodiment of the present invention;
Fig. 2 is a plan view showing the supply relationship between the mold and the gob, Fig. 3 is a plan view showing how to install the mold on the table for each block, and Fig. 4 is a side view showing an example of the adjusting mechanism. FIG. 5 is a cross-sectional plan view taken along line V--V in FIG. 4, and FIG. 6 is a plan view of main parts showing another embodiment of the present invention. T...Table, M...Mold, G...Gob supply mechanism, P...Press mechanism, A...Adjustment mechanism, J...Intermittent drive mechanism.

Claims (1)

[Scope of Claims] 1. A large number of molds consisting of a plurality of blocks each consisting of a plurality of molds are arranged at equal intervals around a table that rotates intermittently, and one of the gob supply positions a step of simultaneously supplying gobs to each of a plurality of molds of one block during a stop period of intermittent rotation of the table, the step comprising adjusting means for setting the drop point of the gob with respect to the mold of the block; 1. A method for producing a glass product, comprising the steps of sending the glass products one block at a time to a press position, and press-forming one block of glass products at a time using a plurality of sets of plungers. 2. A method for manufacturing a glass product, characterized in that a plurality of molds arranged in each block as described in item 1 are arranged parallel to the center line of the table for each block. 3. A table with a large number of molds arranged at equal intervals around it, a drive mechanism that rotates intermittently to feed multiple molds one block at a time, and a drive mechanism that rotates multiple molds one block at a time when the intermittent rotation is stopped. A glass product manufacturing apparatus comprising: a supply mechanism that simultaneously drops and supplies gobs to each gob; and a press mechanism that press-forms one block of a plurality of glass products at a time using a plurality of sets of plungers at a press position. 4 The plurality of molds arranged in each block described in item 3 are arranged parallel to the center line of the table for each block, and the table is equipped with an adjuster mechanism to control the falling point of the gob. Glass product manufacturing equipment characterized by comprising: