JPS5848326Y2 - Glass gob feeder for manufacturing bubble filled glassware - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a glass gob feeder used for molding a glass container such as a glass container with air bubbles sealed in the thick bottom part thereof, and specifically relates to an orifice forming a gob supply port in the glass gob feeder. This relates to the shape of the gas supply pipe that penetrates the 5 portion in a substantially radial direction and opens in the molten glass within the diameter of the orifice ring.

As a conventional device, gas is released into the molten glass from a gas supply pipe that penetrates the orifice ring in the radial direction and opens into the molten glass within the diameter of the orifice ring, and the gas is released into the molten glass by a plunger that reciprocates up and down. A device for forming glass gobs containing air bubbles by intermittently extruding and cutting molten glass containing gas through an orifice has already been proposed in Utility Model Application No. 102,687/1987.

However, in the method of forming a glass gob containing bubbles using this conventional device, as shown in FIG. Therefore, the gas released from the open lower into the molten glass 2 flows through the orifice 5.
When bubbles are formed in the molten glass 2 being pushed out in the direction, the outflow of gas from the pipe 3' is unstable, and the flow of the molten glass is disturbed by the presence of the gas supply pipe 3', so that the position of the bubbles enclosed in the glass gob is changed. There was a risk that the bubbles would shift to one side, or the shape of the bubbles would be disturbed, and in some cases, the bubbles might be separated.

The present invention aims to provide a glass gob feeder for manufacturing bubble glassware that solves the above-mentioned problems.

That is, the gist of the present invention is to release gas from the opening of the gas supply pipe at a position where the flow of molten glass is not disturbed by the presence of the gas supply pipe, and to balance the resistance of the flow of molten glass. , orifice ring 1
The gas supply pipe 3', which passes through the orifice ring 1 in the radial direction, has a radial straight part that reaches the radial center of the orifice ring 1, and a radially straight part that is bent or bent in the axial direction from the radial center of the orifice ring 1. A lower end of the axial straight line is provided at the lower end of the axial straight line to form a gas supply lower end, and the circular cross section of the orifice ring 1 is made equal to the radial straight part of the gas supply pipe 3. A rod-shaped support 8 is provided to separate the parts.

This support 8 may be used for supporting and reinforcing the gas supply pipe 3', or may also be used as a gas supply pipe.

The present invention will be described in detail below according to examples.

Example 1 In Fig. 2a, gas supply pipe 3 made of heat-resistant metal
A radial straight portion 3a that penetrates the orifice ring 1 in the radial direction and reaches the radially inner center of the orifice ring 1, and an axial straight portion 3b that is bent in the axial direction and extended downward from the radial center. A gas supply lower portion is formed at the hanging end of this straight portion 3b.

The gas supply pipe 3 is welded and supported by a support 8 made of the same material as the gas supply pipe 3 inserted through the orifice ring 1 so as to have a diameter matching the penetrating direction of the orifice ring 1.

The radially outer end of the orifice ring 1 of the gas supply pipe 3 is connected by a pipe 11 to a gas supply device 10 that intermittently supplies a fixed amount of gas in synchronization with the vertical movement of the plunger 4.

The above configuration is applied to a known glass gob feeder, 144 gob feeder manufactured by Bartford Co., Ltd., in which the gas supply pipe 3 has an outer diameter of 3 mm, an inner diameter of 1 mm, the length of the axial straight portion 3b is 8 mm, and the support body 8 is a gas gob feeder. A bubble-filled glass gob is made of the same material as the supply pipe 3 and has a diameter of 3 mm.
A tumbler shown in FIG. 3 was test-molded by feeding the foamed glass gob to a Bartford H-28 molding machine.

The operation of this glass gob feeder is such that when the reciprocating plunger 4 reaches its top dead center, the gas supply device 10 operates in synchronization with the plunger 4 to force-feed a certain amount of gas to the gas supply pipe. Gas is released into the molten glass 2 from the lower end of the axial straight portion 3b of the molten glass 2 (see Fig. 2), and the gas forms bubbles 14 in the molten glass 2 and is melted by the descending plunger 4. The glass 2 is pushed out from the orifice 5 and cut by the shearing mechanism 16 that operates in synchronization with the plunger 4 to form a glass gob 15 containing bubbles 14 (second
(See Figure C).

The glass gob 15 is then fed to the molding machine and molded by a conventional press and blow molding method.

Note that the timing of the gas release can be adjusted as appropriate so that the gas is sealed at a desired position relative to the glass gob 15.

The molding results of the glassware according to the above embodiment have been experimentally confirmed as being effective in preventing deviation and misalignment of the position of the bubbles sealed in the thick part of the bottom of the glassware compared to molding using the conventional apparatus.

As described above, the glass gob feeder for producing bubble-filled glassware according to the present invention has a significantly more stable position and shape of the gas bubbles sealed in the thick walled bottom part of the glassware compared to conventional equipment, and as a result, the glass gob feeder for producing bubble-filled glassware has been improved. This greatly contributes to the industry, such as improving the quality of utensils and improving productivity.

[Brief explanation of the drawing]

FIG. 1 shows the cross-sectional shape of a conventional glass cob feeder for manufacturing bubble-filled glassware, and FIG. FIG. 3 shows the cross-sectional shape of an example of foam-filled glassware molded by the apparatus of the present invention. 1... Orifice ring, 2... Molten glass, 3... Gas supply pipe, 3a...
...Radial direction straight part, 3b...Axial direction straight part,
4... Plunger, 5... Orifice, 6... Glass gob feeder for manufacturing bubble glassware, 7... Opening, 8... ...Support,
9...Casing, 10...Gas supply device, 11...Piping, 12...Vertical movement drive support arm, 13...Tube , 14...
...Gas bubble, 15...Glass gob, 16...
... Shear mechanism, 20 ... Bubble-filled glass vessel, 21 ... Thick bottom part, 22 ... Gas bubbles.

Claims (1)

[Claims for Utility Model Registration] ■ In the glass gob feeder 6 which forms glass gobs 15 by cutting the molten glass 2 pushed out from the orifice 5 by the shearing mechanism 16 by the vertical reciprocation of the plunger 4, the orifice in the orifice 5 portion The orifice ring 1 penetrates the ring 1 in a substantially radial direction, and the orifice ring 1
A gas supply pipe 3 that opens in the molten glass 2 inside the
Radial straight portion 3 reaching the radial center of the orifice ring 1
a, and an axially straight portion 3b which is bent or bent from the center portion within the diameter to extend the gas supply amount lower in the axial direction, and further includes an orifice ring 1 diameter of the gas supply pipe 3. A glass gob feeder for manufacturing bubble-filled glassware, characterized in that the inner center portion is reinforced and supported by a support 8 that equally divides the circular cross section of the orifice ring 1 together with the radial straight portion 3a. 2. Glass gob feeder for producing bubble-filled glassware according to claim 1 of the registered utility model, characterized in that the support body 8 has the same external shape as the gas supply pipe 3