JPH0442333B2 - - Google Patents

Description

Detailed Description of the Invention (Technical Field) The present invention relates to a glass forming apparatus in which a molten glass gob (gob) dropped from above is conveyed through a conveying path (glass forming delivery) arranged below the gob.
This relates to a gob supply device that leads to.

(Prior Art) Conventionally, in glass forming equipment used to manufacture glass products such as bottles, cups, beakers and flasks, molten glass is generally melted in a melting furnace and then cut into predetermined sizes. A gob supply device equipped with a guide hole (intermediate funnel) through which the gob passes is disposed on the path through which the lump (hereinafter referred to as a gob) is allowed to fall, and by this gob supply device, the upper The gobs that are supplied more continuously are guided to a conveyance path (delivery) that conveys the gobs into a predetermined mold.

In addition, in the case of such a gob supply device, normally,
Above the guide hole, there is a gob removal mechanism consisting of a removal plate that is driven in a direction across the opening of the guide hole.If an abnormality occurs in the mold, etc., the drive of the removal plate is stopped. Therefore, the gobs that are continuously supplied from above are removed to the outside of the device.

However, the guide hole or exclusion plate in such a gob supply device is exposed to high temperatures (usually 1100
~1200℃) due to contact with the gob.
This had inherent problems such as welding of the gobs, clogging of the guide holes and mechanical troubles, and a reduction in the conveyance speed of the gobs due to such contact of the gobs. However, there were also problems in that the products were subject to defects such as wrinkles and stains.

Therefore, as shown in U.S. Pat. No. 3,893,835, etc., a plurality of fumarole holes that open on the surface where the gob comes into contact are provided in the guide holes and the exclusion plate, and pressurized fluid is supplied through the fumarole holes. It is conceivable that by ejecting, a fluid film is formed on such a contact surface to avoid direct contact of the gob.

However, in the case of a gob supply device having such a structure, it is extremely difficult to manufacture it because it is necessary to drill a large number of blowholes in the guide hole and the exclusion plate by machining, etc. In addition, there was a problem in that the device became expensive.

In addition, because the fumarole holes are drilled by machining, the hole diameter that can be formed is limited by the thickness of the material, etc., and it is not possible to set it to a value that small. Since the diameter is 0.2 to 0.3 mm, the amount of fluid used is large, and
It was extremely difficult to form a uniform air layer or oil film layer with sufficient rigidity.
This could not be an effective solution to the problems mentioned above.

(Solution Means) Here, the present invention has been made against the background of the above-mentioned circumstances, and is characterized by having a guide hole through which a molten glass lump dropped from above passes, This is a gob supply device in a glass forming apparatus that guides such a molten glass gob into a conveyance path arranged below the gob, and the skeleton itself forming a continuous skeletal structure is hollow, and holes are formed in the skeleton. Porosity that allows fluid to permeate through the pores formed in the skeleton by injecting a predetermined matrix material into the skeletal gaps in the ceramic structure to create an integral structure. Using a porous member, at least a part of the inner circumferential surface of the guide hole is formed by the porous member, and the pores formed in the skeleton are opened in the inner circumferential surface. A supply channel is provided that communicates with the hole and supplies pressurized gas to the hole, and the pressure gas supplied through the supply channel is passed through the hole to the inner circumferential surface of the guide hole. The reason is that it is made to erupt.

The present invention also includes a guide hole through which a molten glass lump falling from above passes, and a removal plate that is driven above the guide hole in a direction transverse to the opening surface of the guide hole,
The molten glass gob is guided through the guide hole into a conveyance path disposed below the guide hole, and the molten glass gob is driven out of the device by driving the removal plate. A gob feeding device in a molding device, which inserts a predetermined matrix material into the skeletal gaps in a ceramic structure in which the skeletal structure forming a continuous skeletal tissue is hollow and pores are formed in the skeletal structure. By using a porous member that has an integral structure so that fluid can pass through the pores formed in the skeleton, by the porous member,
At least a part of the inner circumferential surface of the guide hole and/or at least a part of the abutting surface of the exclusion plate against the molten glass gob are formed so that the hole formed in the skeleton is formed in the inner circumferential surface and/or Alternatively, a supply channel is provided which is opened at the contact surface and communicates with the holes to supply pressurized gas to the holes, so that the pressure gas supplied through the supply channel is connected to the holes. Another feature is that the liquid is ejected onto the inner circumferential surface and/or contact surface through the hole.

(Example) Hereinafter, in order to clarify the present invention more specifically, an example of the present invention will be described in detail with reference to the drawings.

First, FIG. 1 shows an embodiment of a gob feeding device constructed according to the present invention. Such a gob supply device includes an upper cylinder 12 and a lower cylinder 1 that are superimposed in the axial direction on a base 10, respectively.
4 and two cylinder bodies 16, 16 having a generally cylindrical shape as a whole.

Further, as shown in FIG. 2, an inner hole 18 is provided in the upper cylinder 12 of each cylinder 16.
In the lower cylinder 14, there is a rotary cylinder body 24 having an inner hole 22 which also penetrates the inside of the base 10 and opens to the outside at the lower surface of the base 10. It is arranged.

The inner hole 18 of the funnel 20 is
The inner hole 22 of the rotary cylinder body 24 is formed with a funnel shape that widens toward the top, and a scoop 26 having a groove-shaped cross section as a conveyance path is integrally formed in the inner hole 22 of the rotary cylinder body 24 at its lower open end. is installed.

Further, the rotary cylinder 24 is rotatably disposed by being supported by the lower cylinder 14 and the base 10 via bearings 28 and 30, and the base 10 A pinion 32 is fitted onto the inner part,
As the rack 34 reciprocates, it is rotated together with the scoop 26 about its axis.

And, in the case of such a gob supply device,
As is well known, it is melted in a melting furnace,
Furthermore, it is disposed on the falling path of the gob 36 (molten glass lump) that is continuously formed by cutting it into an appropriate size with a shear, etc. The gob 36, which is dropped into an inaccurate position due to the
8 and 22 to guide it into the scoop 26. Also, around such a gob supply device, there are usually two scoops for each scoop.
6 as a center, a plurality of troughs and deflectors are arranged radially as conveyance paths for guiding gobs 36 into each mold, and as the rotary cylinder body 24 (scoop 26) is rotated, each Gobs are sequentially distributed and supplied to the trough.

As is clear from this, in this embodiment, the inner hole 18 of the funnel 20 and the inner hole 22 of the rotary cylinder 24 constitute a guide hole for guiding the gob into the conveyance path. -ing

In the gob feeding device of this embodiment, the funnels 20 each having the inner hole 18 are each made of a porous member.

That is, such a porous member can be obtained by, for example, foaming a resin such as ester-based urethane and then removing the film-like substance (foamed film) remaining around the skeleton using compressed air or the like. In addition, a synthetic resin foam having a three-dimensional network structure skeleton structure is obtained by attaching a ceramic material such as a ceramic slurry to the surface of the skeleton, and then drying and firing it, as shown in Fig. 3. A known ceramic structure 42 is used, in which the skeleton 38 itself forming a continuous skeletal structure as a whole is hollow, and continuous holes 40 are formed in the skeleton 38. With the body 42 placed in a predetermined casting cavity, a predetermined molten metal is introduced into the casting cavity, and the molten metal is poured into the skeleton 3.
A porous member having a structure in which a ceramic structure 42 is integrally embedded in a predetermined cast metal 44, as shown in FIG. 46 will be suitably used.

Note that as the ceramic material forming the ceramic structure 42, cordierite, alumina, SiC, mullite, zirconia, etc. are appropriately selected and employed depending on the characteristics required for the intended funnel 20. ,Also,
The molten metal forming the cast metal 44 has a chemical composition that is controlled according to the physical characteristics required for the funnel 20, and for example, aluminum alloy, cast iron, etc. are preferably used. becomes.

That is, in the case of such a porous member 46, the cast metal 4 is placed in the cells constituted by the skeleton 38 that forms the porous structure of the ceramic structure 42.
4 enters the cast metal 44 to form an integral structure with the ceramic structure 42, while the pores 4 of the skeleton 38 in the cast ceramic structure 42
Intrusion of molten metal into the hole 40 is prevented because the opening of the hole 40 is closed, and the hole 40 is maintained in a communicating state.

In addition, in this embodiment, the ceramic structure 42 as described above is used for the purpose funnel 20.
The funnel 20 is formed in a shape corresponding to the above-mentioned shape, and is placed in the casting cavity forming the funnel 20. By performing the casting operation of the funnel 20, an integral part is formed inside the funnel 20 at the same time as the casting. As a result, the funnel 20 is composed of the porous member 46 having the structure as described above.

Then, by performing a grinding process or the like on the inner peripheral surface and outer peripheral surface of the cast product thus formed, the holes 40 formed inside the inner peripheral surface and an opening is formed on the outer circumferential surface, thereby forming a funnel 20.

In addition, funnel 2 with such a structure
0 and 20 are respectively fitted into the upper cylinder 12 and fixed integrally by the set bolts 48. By providing a recess extending all the way around in the circumferential direction at the central portion in the axial direction, a cylindrical sealed communication space 50 is defined between the funnel 20 and the upper cylinder 12. It is being The holes 40 formed in the funnel 20 and opened on the outer peripheral surface thereof are opened and communicated with the communication space 50 over substantially the entire outer peripheral surface defining the communication space 50. be.

On the other hand, the upper cylinder 12 has a communication space 50.
A supply hole 52 communicating with is provided through the wall thereof, and a pressure fluid supply pipe 54 is connected to the supply hole 52. A predetermined pressure fluid supplied through the pressure supply pipe 54 is supplied into the cavity 40 of the funnel 20 via the supply hole 52 and the communication space 50. As is clear from the above, in this embodiment, the supply hole 52 and the communication space 50 form a supply channel for guiding the pressure fluid supplied from the outside to the holes 40 of the funnel 20, which is a porous member. is made up of.

Therefore, the funnel 2 having the structure as described above
In the gob supply device according to the present embodiment equipped with
It will be ejected on 8 sides,
There, the pressure fluid ejection holes in the funnel 20 are connected to the holes 4 in the porous member 46.
0, such ejection holes can be easily set to have a fine diameter and an appropriate distribution density.

That is, the diameter of the pores 40 of the ceramic structure 42 constituting the fumarole is usually
Since it is extremely fine at 0.05 to 0.3 mm ² , an effective throttling effect can be exerted, thereby forming a fluid film on the inner hole 18 surface of the funnel 20 with a small amount of air consumption. It can be formed with high rigidity.

Then, due to the action of the ejected fluid, the gob 36 falling through the inner hole 18 is moved to the scoop 2.
6, where the fluid film formed on the surface of the inner hole 18 can provide excellent sliding properties and avoid direct contact with the gob 36. From there, Gob 36
It is possible to effectively prevent the occurrence of defects such as wrinkles and sagging in the product due to clogging of the inner holes 18 and 22 or mechanical troubles caused by welding of the gob 36 or a decrease in the conveyance speed of the gob 36, resulting in a good product. This means that operations can be carried out stably.

Furthermore, in the gob supply device of this embodiment, a communication space 50 is formed between the funnel 20 and the upper cylinder 12, and extends all the way around the back surface of the funnel 20 in the circumferential direction. Supply hole 5
2 and the inner hole 1 of said funnel 20
The ejection pressure of the pressure fluid ejected on the eight surfaces can be effectively equalized, and the gob 36 can be guided more effectively.

Furthermore, since the funnel 20 does not require post-processing by machining to form the ejection holes (holes 40), the conventional
Compared to a structure in which the ejection hole is drilled by post-processing, the production of the gob feeding device is extremely easy, and therefore, the gob feeding device has the excellent performance as described above.
It also has the advantage that it can be manufactured easily and at low cost.

Incidentally, a gob supply device having the above-described structure is set in a glass molding device, and a pressure of 1.2 kg/cm ² (gauge pressure) is supplied through the pressure supply pipe 54.
When the gob 36 was continuously operated under a condition where compressed air was supplied, the gob 36 was guided to the center of the inner hole 18 and was able to be guided well and stably to the scoop 26. In addition, the air consumption during such operation is 25 to 30 Nl/min,
1/10 to 1/20 compared to conventional equipment as mentioned above.
The fact that we were able to achieve good operation with an air consumption of
This is an extremely large effect.

Furthermore, by using compressed air with mineral oil such as turbine oil #56 added at 0.5 to 1.2 cc/min as the pressure fluid supplied through the pressure supply pipe 54, it is possible to reduce the amount of mineral oil flowing down. The rotating cylinder 2 disposed below the funnel 20
4 and the scoop 26 as well, it has been confirmed that good sliding properties can be imparted to the gob 36.

By the way, in the gob supply device of this embodiment, as shown in FIG.
The gob removal mechanism includes a removal plate 62 driven by a gob removal mechanism. In this gob removal mechanism, the removal plate 62 is moved above the inner hole 18 in the cylinder body 16 by the air cylinder 60.
It is designed to be reciprocated in a direction across the opening, and as is well known, when an abnormality occurs in the mold, the removal plate 62 is projected from above. The continuously supplied gob 36 is flicked out to the side,
It is designed so that it can be removed to the outside of the device. Although not shown, the exclusion plate 62
A receiving gutter is usually disposed in front of the projecting direction, and the gobs 36 thus removed are collected and removed by the receiving gutter.

And here, in this example,
The front surface of the removal plate 62 in the gob removal mechanism in the protruding direction is constituted by the porous member 46.

That is, in the case of such an exclusion plate 62, similarly to the funnel 20, a ceramic structure 42 having a specific structure as described above, which is formed in a shape corresponding to the intended exclusion plate 62, is used. With the ceramic structure 42 placed in the casting cavity of the mold forming the exclusion plate 62, an aluminum alloy guides a predetermined cast metal such as cast iron into the casting cavity,
It is formed by performing a casting operation, and its front portion is constituted by a porous member 46 having continuous pores 40 as a whole, as shown in FIG. -ing

By subjecting the front surface of the porous member 46 to a grinding process, the pores 40 formed inside the porous member 46 are opened at the front surface, and the holes 40 formed inside the porous member 46 are opened at the front surface. A supply hole communicating with the hole 40 is bored, thereby forming the exclusion plate 62.

Further, a pressure fluid supply pipe 64 is connected to the supply hole of the exclusion plate 62 having such a structure, and a predetermined pressure fluid supplied through the pressure supply pipe 64 flows through the supply hole. The liquid is supplied into the holes of the exclusion plate 62 through the medium.

Therefore, in the gob removal mechanism of this embodiment, which includes the removal plate 62 structured as described above, by supplying pressure fluid such as compressed air or lubricating oil through the pressure fluid supply pipe 64, The pressure fluid is ejected onto the front surface of the exclusion plate 62, and the pressure fluid injection holes in the exclusion plate 62 are formed by the holes 40 in the porous member 46. Therefore, as mentioned above, such ejection holes can be easily set to have a fine diameter and an appropriate distribution density.

Thereby, a fluid film can be formed with high rigidity on the front surface of the exclusion plate 62 with low air consumption.
Even when the removal plate 62 is driven to remove the gob 36, direct contact with the gob 36 can be avoided due to the action of the fluid film, and a cooling effect on the removal plate 62 is effectively exerted. Therefore, it is possible to effectively avoid the welding of the gob 36 to the removal plate 62 and the mechanical troubles caused by this, which has been a big problem in the past. Even in the case of continuous operation, good and stable operation can be achieved.

Furthermore, since such an exclusion plate 62 does not require post-processing by machining to form the ejection holes (holes 40), it can be manufactured easily and at low cost. It also has the effect that it is said to be able to do.

Incidentally, a gob supply device equipped with a gob removal mechanism having the above-described structure is set in a glass molding device, and pressure:
When the falling gob 36 was continuously removed under a condition where compressed air of 0.6 to 0.8 Kg/cm ² (gauge pressure) was supplied, it was found that the gob 36 was welded to the removal plate 62, etc. It was confirmed that stable exclusion operation could be performed without any trouble occurring. In addition, the air consumption during such operation was extremely small, 15 to 17 Nl/min, and excellent effects could therefore be achieved. In this device, a lightweight aluminum alloy is used as the cast metal for the exclusion plate 62 so that the exclusion plate 62 can be driven quickly.

Although one embodiment of the gob supply device structured according to the present invention has been described in detail above, this is a literal illustration, and the present invention is not to be construed as being limited to such a specific example. .

For example, in the gob feeding device in the embodiment described above, the inner hole 18 of the funnel 20 was entirely made up of the porous member 46, but a part of it was made up of the porous member 46. Even in such a case, the effects of the present invention can be effectively exhibited. However, even if a part of the funnel 20 is formed of the porous member 46, the porous member 46 may be disposed continuously in the circumferential direction in order to guide the gob 36 to the center thereof. desirable.

In addition to the inner hole 18 of the funnel 20, the inner hole 22 of the rotary cylinder 24, which together with the inner hole 18 constitutes the guide hole of the gob 36, is made of the porous member 46. Also good.

Furthermore, in the above embodiment, the funnel 2
Although the communication space 50 was formed between the upper cylinder 12 and the upper cylinder 12, the communication space 50 is not necessarily required.

Furthermore, the porous member 46 in the above embodiment
In this case, the ceramic structure 42 having a three-dimensional network structure was used to form the ceramic structure, but in particular, when the communication space 50 is formed as shown in the example, the pores in the porous member are For example, it is possible to use a ceramic structure in the shape of a crest or a comb, and thereby set the direction of ejection from the ejection hole constituted by the pores. This also makes it possible.

Further, in the embodiment described above, the upper tube 12 and the funnel 20 were formed as separate members, but it is also possible to form them integrally.

In addition, the gob supply device in the embodiment described above is equipped with a gob removal mechanism, and the porous member 46 is also used in the removal plate 62; On the other hand, even if the present invention is applied to a device in which the porous member 46 is used only in the exclusion plate 62 of such a gob exclusion mechanism, it is within the scope of the present invention. It should be understood that this includes:

In addition, although not listed in detail, the present invention can be implemented in various modifications, modifications, improvements, etc. based on the knowledge of those skilled in the art, and such embodiments may be implemented in accordance with the present invention. It goes without saying that any of these are included within the scope of the present invention as long as they do not deviate from the spirit.

(Effects of the Invention) That is, in the gob supply device according to the present invention, the portion that contacts the gob or guides the gob,
Specifically, a porous member formed using a ceramic structure having a specific structure is applied to the exclusion plate or the guide hole,
Direct contact with the gob is avoided or the gob is guided into a predetermined position by the action of the pressurized fluid ejected through the holes provided in the porous member.

By configuring the exclusion plate or the guide hole with a porous member using a ceramic structure having a specific structure in this way, it is possible to form the ejection hole with an extremely fine diameter and with respect to such a member. It is easy to form, thereby effectively forming a fluid film on the contact surface of the exclusion plate or the inner circumferential surface of the guide hole with a small amount of pressure fluid consumption. This makes it possible to manufacture at a low cost a gob feeding device that can perform a good and stable glass forming operation.

[Brief explanation of drawings]

FIG. 1 is a perspective explanatory view showing a gob supply device as an embodiment of the present invention, and FIG. 2 is a longitudinal cross-sectional explanatory view of the main body portion of the gob supply device. Further, FIG. 3 is an enlarged cross-sectional explanatory view showing the main parts of a ceramic structure suitably used in manufacturing such a gob feeding device, and FIG. 4 shows a porous member formed using such a ceramic structure. FIG. 2 is an enlarged sectional explanatory diagram of a main part. 10: Base, 12: Upper cylinder, 14: Lower cylinder, 18:
Inner hole, 20: Funnel, 22: Inner hole, 24: Rotating cylinder, 26: Scoop, 36: Gob, 38: Skeleton, 40: Hole, 42: Ceramic structure, 4
4: Cast metal, 46: Porous member, 50: Communication space, 52: Supply hole, 60: Cylinder, 62: Exclusion plate.

Claims (1)

[Scope of Claims] 1. A gob supply device in a glass forming apparatus, which includes a guide hole through which a molten glass gob dropped from above passes, and guides the molten glass gob into a conveyance path arranged below the guide hole. In some cases, the skeleton itself forming a continuous skeletal tissue is hollow, and a predetermined matrix material is inserted into the skeletal gaps in the ceramic structure in which pores are formed in the skeleton to form an integrated structure. By using a porous member that allows fluid to pass through the pores formed in the skeleton,
The porous member constitutes at least a part of the inner circumferential surface of the guide hole, and the pores formed in the skeleton are opened in the inner circumferential surface and are communicated with the pores. A supply flow path is provided for supplying pressurized gas to the hole, and the pressure gas supplied through the supply flow path is ejected onto the inner circumferential surface of the guide hole through the hole. A gob feeding device characterized by: 2. A guide hole through which a molten glass gob dropped from above passes, and a removal plate that is driven above the guide hole in a direction transverse to the opening surface of the guide hole, and the molten glass gob is moved through the guide hole. A gob feeding device for a glass forming device, wherein the molten glass gob is guided into a conveyance path arranged below the gob, and the gob can be removed from the device by driving the removal plate, The skeleton itself forming a continuous skeletal tissue is hollow, and a predetermined matrix material is inserted into the skeletal gaps in the ceramic structure in which pores are formed within the skeleton to form an integrated structure. , using a porous member that allows fluid to pass through the pores formed in its skeleton,
The porous member constitutes at least a portion of the inner circumferential surface of the guide hole and/or at least a portion of the contact surface of the removal plate against the molten glass lump, thereby eliminating the void formed within the framework thereof. Holes are opened in the inner circumferential surface and/or the contact surface, and a supply flow path is provided that communicates with the holes and supplies pressurized gas into the holes, and the supply flow path is provided so that the pressure gas is supplied into the hole. A gob supply device characterized in that the supplied pressurized gas is ejected through the hole onto the inner circumferential surface and/or the contact surface.