JPS60151231A - Device for supplying stably glass gob - Google Patents

Abstract

PURPOSE:To improve the durability, and to supply stably the gob by molding a plunger which can be electrically heated with a heat resistant metal in a titled glass gob supplying device wherein said plunger is provided in correspondence with an orifice. CONSTITUTION:A titled device consists of a spout 1 having an appropriate number of orifices 2A, a tube 3 which is provided in the spout 1 and can be freely moved up and down, and a plunger 4 which is provided in the tube 3. Said plunger 4 is formed of a heat resistant metal, and the same number of the plungers as said orifices 2A are arranged in correspondence with the orifices. A electric power source 5 is connected to the plungers 4 which are positioned at both outer ends, and both outer ends 4 are especially heated. By said device, the difference in temp. between the outer gob and the middle gob can be eliminated, and the durability of the plunger 4 is improved. The gob is stably supplied in this way.

Description

[Detailed Description of the Invention] (Technical Field of the Invention) The present invention relates to a glass gob stable supply device, which continuously supplies gobs of molten glass having uniform dimensions and shapes in order to produce glass bottles and other glassware. This invention relates to a stable glass gob supply device which improves the glass gob supply W8 device to maintain a uniform gob supply temperature, and also improves durability by making the method and shape uniform.

(Technical background of the invention and its problems) A conventional glass gob supply device includes a vertically movable tube inside a spout having an appropriate number of orifices.
Inside this tube, plungers of the same number as orifices are arranged in correspondence with each other, and the tube is designed to continuously supply gobs of molten glass of uniform size and shape from the sub-bow 1. Since the plunger is made of a heat-resistant material such as brick, it is subject to severe wear and tear, especially at the tip (the average lifespan of a firebrick plunger is about 10 days).
In addition, the size and shape of the gob changes each time it is broken, and furthermore, since it is made of firebrick, it may suffer from poor precision or warping due to heat, so it is the same as when it is worn out or broken. They had to be replaced each time, resulting in a huge loss of time and posing a major problem in reducing costs and improving quality.

Also, when supplying gobs from an appropriate number of orifices, especially 3 to 4 or more orifices at the same time, depending on the lifting amount and the size of the gobs, especially when manufacturing small bottles, the outside The temperature of the gob supplied from the orifice is lower, and the temperature of the gob supplied from the orifice on the inside is higher than that of the gob supplied from the orifice on the outside. If the temperature is set to an appropriate temperature, the gob supplied from the outermost orifice will cool down and become banana-shaped due to the temperature difference, making it difficult to supply the gob in a uniform shape.

Therefore, we have proposed a method of heating the orifice ring with an orifice using gas, etc., and a method of heating the orifice ring with the orifice
A method was considered to add a cylindrical passage between the main body, electrically heat this part from the outside, and stir the glass inside the duplex with a plunger with blades, but these methods were not possible due to space constraints and The remodeling was extensive and this was a major difficulty in installing it.

(Objective of the Invention) In view of the above-mentioned drawbacks, the present invention improves the durability of the plunger, and uses a device with a simple structure to uniformize the temperature of the gob to be supplied, so that the gob can be uniform in size and shape. It was created to provide a stable and continuous supply of gobs with .

(Summary of the Invention) The gist of the present invention is to provide a vertically movable tube in a spout having an appropriate number of orifices, and arrange the same number of plungers as the orifices in this tube. In the glass gob supply device, the plungers are made of heat-resistant metal, and a power source is connected to the plungers located at both outer ends of the plungers to heat them.

[Embodiments of the invention]

Hereinafter, the present invention will be described in detail with reference to the drawings.

Reference numeral 1 shown in the figure is a spout with an orifice ring 2 removably attached to the lower surface, and a duplex 3 that moves up and down to match the orifice ring 2 is disposed within this spout 1. A movable plunger 4 is disposed within this duplex 3.

As shown in FIGS. 1 and 2, the orifice ring 2 is provided with four orifices 2A horizontally, and the plunger 4 is also provided with four orifices 2A corresponding to the orifices 2A. (It is J.

The plunger 4 is made of a heat-resistant metal such as nickel chromium steel, and the orifice 2
The portion of the tip on the Δ side that is immersed in the molten glass flowing from the inside of the spout 1 to the orifice 2A is coated with platinum.

Further, the plungers 4 located at both outer ends of the movable plunger 4 are connected to an AC low voltage power source from a transformer 5 to heat them.

Therefore, when the molten glass in the spout 1 is supplied as the C gob through the orifice 2A, in the case of the conventional movable plunger 4 made of refractory brick, its tip is always immersed in the high temperature molten glass. Since the flow velocity is also high, wear and tear is severe and the gob supply amount changes each time and is not uniform.However, if the movable plunger 4 is made of nickel chrome steel or a heat-resistant metal such as Inconel #600 coated with platinum, wear and tear can be avoided. The gob supply M can be kept constant almost without any problem.

As mentioned above, the reason for coating with platinum is that the heat-resistant metal may color the glass and stain it, and when electricity is applied, the parts with high current density become particularly hot, resulting in severe wear and tear, making the glass unusable. be.

At this time, if the orifice 2A is formed of a heat-resistant metal ring 8 as shown in FIG. 5J, the orifice ring 2 will not be worn out, so the hot water supplied to the gob can be further stabilized.

When supplying gobs, when current is passed from the transformer 5 to the plungers 1 to 4, the temperature rises especially in the vicinity of the movable plungers 4 on both sides to which the power supply is connected. Since the gob supplied from the orifice 2A at both ends is heated, the gob supplied from the orifice 2A at both ends can be supplied with "C" to the same temperature as the gob supplied from the A rifice 2A located in the middle.

Further, as shown in Fig. 4, when only the plungers 4 located at both ends are made of heat-resistant metal and the middle movable plunger 4 is made of firebrick, the middle movable plunger 4 is made of an insulator. Is there a movable metal plunger on both ends? −
Current flows only through 4, which can raise the temperature especially at both ends.

Incidentally, even if the number of gobs is three, the effect is equally great. In addition, the input power changes depending on the gob temperature setting and the temperature difference between the gobs, but you can adjust the input power by manually switching the voltage tap, or for example, measure the gob temperature with a radiation thermometer and use a temperature controller. You may use this to automatically operate the SCR or the S voltage regulator to change the voltage and adjust the input voltage. Furthermore, the current flowing between the metal plungers may be controlled (M current control till) to control the current so that a constant electric power is applied. 6 in the figure is the wiring to the movable planar relay 4.

(Effects of the Invention) Since the present invention is constructed as described above, the temperature of the supplied gob can be made uniform by a very simple method, and the movable plunger 4 can be formed with high precision without being easily broken or worn out. This makes it possible to stably and continuously supply gobs with uniform dimensions and shapes.

1. That is, a vertically movable tube 3 is provided in a spout 1 having an appropriate number of orifices 2A, and the same number of plungers 4 as orifices 2A are arranged in the duplex 3 in correspondence with each other. In the glass gob supply device installed, the plungers 4 are molded from heat-resistant metal, and plungers 4 located at both outer ends of these plungers 4 are provided.
By adding an AC low-voltage power supply to and controlling the input power t11, the temperature difference between the outer gob and the intermediate gob is eliminated.
Further, while the conventional refractory plunger 11- had an average lifespan of about 10 days, the heat-resistant metal plunger 4 can withstand use for several months or more. As a result, the number of replacements is drastically reduced, and there is no change in the gob's shape or shape due to wear, and it is possible to stably and continuously supply the gob at a uniform temperature.

As explained above, according to the present invention, the durability of the plunger 4 can be improved, and a device with a simple structure can be used.
It is possible to stabilize and continuously supply gobs of uniform size and shape by uniformizing the temperature of the supplied gobs, and it can be easily attached to a conventional gob supply device. It can be improved, and it can be provided at a very low cost, and has excellent effects.

[BRIEF DESCRIPTION OF THE DRAWINGS] The drawings show an embodiment of the present invention, and FIG. 1 is a front sectional view of the main part, FIG. 2 is a view taken along the △-△ arrow in FIG. 1 is a schematic diagram showing the current flow in the tube in another embodiment, FIG. 4 is a schematic diagram showing the current flow in the tube in another embodiment, and FIG. 5 is a sectional view of the orifice ring. 1... Spout, 2... Orifice ring, 2△・
... Orifice, 3 ... Tube, 4 ... Movable plunger, 5 ... Transformer, 8 ... Heat-resistant metal ring. Patent applicant: 1 person other than Kan-A Glass Co., Ltd. Figure 3, Figure 7 (Figure 2, Figure 4, Figure 5)

Claims (1)

[Claims] 1. A glass gob supply device in which a vertically movable tube is provided in a spout having an appropriate number of orifices, and the same number of plungers as orifices are arranged in this tube in correspondence with each other. . A device for stably supplying glass gobs, characterized in that the plungers are made of heat-resistant metal, and a power source is connected to the plungers located at both outer ends of the plungers to heat them. 2. The glass gob stable supply device according to claim 1, wherein the orifice is formed of a heat-resistant metal ring.