JPH01133945A - Gob guiding device - Google Patents

Abstract

PURPOSE:To introduce a gob into a molding die with good sliding properties and centering properties by injecting fluid through fluid injection ports which are opened on the inner peripheral face of a guide hole provided on specified porous material. CONSTITUTION:A porous member having an integral structure is formed by infiltrating prescribed matrix material into the skeleton gaps of a ceramic structural body in which holes are formed in the hollow skeleton itself forming a continuous skeleton structure. The inner peripheral face 37 of a guide hole 28 of the porous member is ground and worked to obtain a gob guiding device 26 wherein holes are opened in a range over all inner peripheral faces. Then this device 26 is supported to an outer flange part 30 inserted into a bracket 34 supported on a supporting strut 32. Fluid is supplied via the central hole of a connector 50 and a screw hole 48 and injected on the inner peripheral face 37 through the holes. Then a gob 16 obtained by cutting molten glass 12 fed from an orifice 10 with shears 14 is supplied to the molding cavity 36 of a molding die 24 via a scoop 18, trough 20, a deflector 22 and the device 26.

Description

Detailed Description of the Invention (Technical Field) The present invention relates to a gob guide device for guiding a molten glass gob (gob) into a molding cavity of a predetermined mold in a glass forming apparatus, and particularly relates to a gob guide device for guiding a molten glass gob (gob) into a molding cavity of a predetermined mold. The present invention relates to a gob guide device that can guide a gob into a mold with good centering properties and can effectively reduce the occurrence of defects in products.

(Prior Art) Conventionally, in glass forming equipment used to manufacture glass products such as bottles, cups, beers, and flasks, glass is generally melted in a melting furnace and then cut into a predetermined size. A molten glass gob (hereinafter referred to as a gob) that is guided through a glass forming delivery system consisting of a scoop, a trough, and a deflector and is continuously dropped and supplied from above is molded into a predetermined mold placed below. In order to accurately guide the gob into the cavity, a gob guiding device (also called funnel) is provided at the upper opening of the molding cavity in the mold, which is provided with a guide hole through which the gob passes.

When a gob dropped from above deviates from the center of the upper opening of the mold, the falling direction is corrected by contact with the inner circumferential surface of the tapered guide hole in the gob guide device, and the gob falls into the mold cavity. They are designed to be well guided within themselves.

(Problems) However, in such a gob guide device, contact between the hot gob and the metal may cause poor centering or deformation of the gob, and mechanical troubles may easily occur if the guide hole becomes clogged. Moreover, due to the contact of such gobs with the inner circumferential surface of the guide hole, there was also the problem that defects such as wrinkles, sagging, uneven thickness, etc. were likely to occur in the product. It is.

Therefore, in such a conventional gob guide device, as described above, the original function of the device is to correct the misalignment of the gob supplied from the delivery device and accurately guide the gob into the mold. This could never be achieved effectively, and it was necessary to frequently adjust the delivery itself that guides the gob to the gob guide device.

(Solution Means) Here, the present invention has been made against the background of the above-mentioned circumstances, and its purpose is to inject the supplied gob into a mold with good sliding and centering properties. An object of the present invention is to provide a gob guiding device that can advantageously reduce the occurrence of defects in products.

In order to achieve this object, the present invention is characterized by providing a guide hole through which a molten glass gob dropped from above passes, and directing the molten glass gob to a predetermined hole placed below the guide hole. A gob guide device in a glass forming apparatus as described above, which guides the gob into a molding cavity of a mold, and is made of a ceramic whose skeleton itself forming a continuous skeletal structure is hollow and holes are formed in the skeleton. Using a porous member that allows fluid to permeate through the pores formed in the skeleton by inserting a predetermined matrix material into the skeletal gap of the structure to form an integral structure, 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 the porous member communicates with the pores, A supply flow path is provided for supplying a predetermined pressure fluid to the hole, and the pressure fluid supplied through the supply flow path is ejected onto the inner circumferential surface of the guide hole through the hole. It's what I did.

(Effects of the Invention) In the gob guide device having the structure according to the present invention, the inner circumferential surface of the guide hole is Since the fluid ejection hole opening in the guide hole is formed, such a fluid ejection hole can be easily formed with a fine diameter and at any position on the inner circumferential surface of the guide hole.

As a result of the fact that the fluid ejection hole opening on the inner circumferential surface of the guide hole can be formed with a fine diameter, a fluid film of the ejected fluid can be formed with high rigidity on the inner circumferential surface due to the constriction effect. It is possible to
Therefore, the fluid film can prevent the gob from coming into direct contact with the inner circumferential surface, and can stably exhibit excellent sliding properties.

Therefore, in the gob feeding device having the structure according to the present invention, it is possible to stably exhibit excellent slipping and centering properties for the gobs, and thereby "the occurrence of defects in glass products is prevented". This will effectively suppress or prevent the problem, and the quality can be effectively improved.

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

First, FIG. 1 is a schematic diagram showing the overall structure of a commonly used glass forming apparatus in order to explain the usage of the gob guide apparatus to which the present invention is applied. In this figure, 10 is an orifice that continuously supplies molten glass, and the molten glass 12 supplied from the orifice 10 is delivered to a shear 14 disposed below.
By cutting to an appropriate length, a gob (molten glass lump) 16 of a predetermined size is formed and dropped, and the dropped gob 16 is inserted into the orifice 1.
The receiver is taken by a delivery system consisting of a scoop 18, a trough 20, and a deflector 22 arranged below the 0, and is guided above a predetermined mold (original mold for parison formation) 24 by the delivery. It has become. A gob guide device 26, which is the object of the present invention, is provided above the opening of the molding cavity provided on the upper surface of the mold 24, and the gob guide device 26 prevents the product from falling from the delivery. The supplied gob 16 is precisely guided into the molding cavity of the mold 24.

Note that, as is well known, a plurality of such molds 24 are usually arranged in parallel, and these molds 24
trough 20 guiding the gob 16 and deflector 2
2 is radially released from scoop 18, while
The scoop 18 is provided so as to be rotatable around one axis that substantially coincides with the falling direction of the gob 16, and by controlling the rotation of the scoop 18, the gob 16 that is continuously supplied is delivered to each trough 20. It will be distributed and supplied.

Here, as shown in FIGS. 2 and 3, the gob guide device 26 has a thick-walled cylindrical shape as a whole, and an inner hole 2 is provided through the center thereof.
8 is formed in a funnel shape that widens toward the top, and an outer flange portion 30 is provided on the outer circumferential surface on the upper side in the axial direction.

In such a gob guide device 26, the second
As shown in the figure, the bracket 34 is inserted into a circular support hole of a bracket 34 supported by a column 32.
By being supported by the outer flange portion 30 of the molding die 24, the molding die 24 is positioned above the opening of the molding cavity 36 provided on the upper surface of the molding die 24, and is arranged concentrically with the opening of the molding cavity 36. As a result, as described above, the gob 16 that falls and is supplied at an inaccurate position from the delivery disposed above is molded by the funnel-shaped inner peripheral surface 37 of the inner hole 28 of the mold 24. This will ensure accurate guidance into the cavity 36.

Here, in the gob guide device of this embodiment, the entirety (except for the outer flange portion 30) is made of a porous member.

That is, such a porous member can be obtained, for example, by foaming a resin such as ester-based urethane and then removing the membrane-like substance (foamed membrane) 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 adhering a ceramic material such as a ceramic slurry to the surface of the skeleton, and then drying and firing it, as shown in Fig. 4. A known ceramic structure 42 in which a skeleton 38 forming a continuous skeletal structure as a whole is hollow, and continuous pores 40 are formed in the skeleton 38.
With the ceramic structure 42 placed in a predetermined casting cavity, a predetermined molten metal is introduced into the casting cavity, and the molten metal enters the gap between the skeleton 38. A predetermined cast metal 44, as shown in FIG.
A porous member 46 having a structure in which a ceramic structure 42 is integrally embedded is preferably used.

The ceramic material forming the ceramic structure 42 may include cordierite, alumina, S
IC% mullite, zirconia, etc. are selected and adopted as appropriate, and the molten metal for forming the cast metal 44 also has chemical components that are controlled according to the physical characteristics required for the gob guide device. For example, aluminum alloy, cast iron, etc. are preferably used.

That is, in such a porous member 46, the cast metal 44 enters the cells constituted by the skeleton 38 forming the porous structure of the ceramic structure 42, and the cast metal 44 forms the ceramic structure. 42 has an integral structure that constitutes a matrix, while the molten metal can enter the pores 40 of the skeleton 38 in the cast ceramic structure 42 if the openings of the pores 40 are Since it is in a closed state, it is prevented, and the hole 40 is maintained in a communicating state.

In this embodiment, the ceramic structure 42 as described above is formed to have a shape corresponding to the intended gob guide device 26, and is placed in a casting cavity that forms the gob guide device 26. By performing the casting operation of the gob guide device 26 under such conditions, at the same time as the casting, inside the gob guide device 26 except for the outer flange portion 30,
The entire gob feeding device 26 is integrally buried, and thus the gob feeding device 26 is constituted by the porous member 46 having the structure as described above.

Then, by performing a grinding process or the like on the inner peripheral surface 37 of the inner hole 28 in the cast product thus formed, the holes 40 formed inside the inner peripheral surface 37 of the inner hole 28 are formed. 37 is opened over the entire surface.

In addition, in such a cast product, four screw holes 48 are provided at a predetermined depth from the outer circumferential surface at equal intervals in the circumferential direction, and the holes 40 are opened in each of the screw holes 48. A hollow connector 50 is screwed into each screw hole 48, thereby forming a gob guide device 26.

Further, although not shown, by connecting a pressure fluid supply pipe to each of the connectors 50, a predetermined pressure fluid supplied through the pressure fluid supply pipe can be supplied to the central hole of the connector 50. is supplied into the hole 40 through the screw hole 48,
Furthermore, the water is ejected onto the inner circumferential surface 37 of the inner hole 28 through the hole 40, and as is clear from this, in this embodiment, the screw hole 48 and the connector 50, the pressure fluid supplied from the outside is transferred to the gob guide device 2 as a porous member.
A supply channel leading to the holes 40 of No. 6 is configured.

Therefore, in the gob guide device 26 having the above-described structure, by supplying pressure fluid such as compressed air or lubricating oil through the pressure fluid supply pipe connected to the connector 50, the pressure fluid can be supplied internally. Inner peripheral surface 3 of hole 28
7, and since the ejection holes for the pressurized fluid there are constituted by the holes 40 in the porous member 46, the ejection holes have a fine diameter and an appropriate diameter. It is possible to easily set the distribution density.

That is, the porous member 46 (
The pores 40 of the ceramic structure 42) have a diameter of
Normally, since it is extremely fine at 0.05 to 0.3 lz, an effective squeezing effect can be exerted, and thereby the inner circumferential surface 37 of the inner hole 28 of the gob guide device 26
Moreover, fluid films with high stiffness can advantageously be formed with low fluid consumption.

Due to the action of the fluid film formed by the ejected fluid on the inner circumferential surface 37 of the inner hole 28, the gob 16 that falls on the inner circumferential surface 37 of the inner hole 28 has excellent sliding properties. Since direct contact with the gob 16 can be effectively avoided, excellent guiding performance for the gob 16, that is, excellent centering performance for the molding die 24 in the molding cavity 36 can be exhibited. , gob 1
If the inner hole 28 is clogged due to the welding of No. 6, mechanical troubles, and the resulting defects such as wrinkles and sagging in the product can be effectively prevented.
As a result, good operations can be carried out stably, and products of good quality can be stably manufactured.

Moreover, in the gob guide device 26 in this embodiment,
The inner circumferential surface 37 of the inner hole 28 is entirely covered with a porous member 46.
Since the pores of the porous member 46 are open over the entire inner circumferential surface 37, particularly excellent centering properties of the gob 1.6 with respect to the mold 24 are exhibited. In addition, compressed fluid is supplied to the pores of the porous member 46 through four threaded holes 48 provided at equal intervals in the circumferential direction. By adjusting and controlling the fluid pressure of the pressure fluid supplied through the gob 16, it is possible to adjust the centering of the gob 16 with respect to the mold 24.

Furthermore, in the gob guide device 26 having such a structure, when forming the ejection hole (hole 40),
Since no special post-processing by machining is required, it also has the advantage of being easily manufactured with good manufacturability.

Incidentally, the gob guide device having the above-mentioned structure is set in a glass molding device, and a pressure of 0.7 to 1.5 kg/rd (gauge pressure) is applied through a pressure fluid supply pipe.
The gob 16 was successfully and stably guided to the center of the molding cavity 36 in the mold 24 through the inner hole 28 when the gob 16 was continuously operated under a condition where compressed air was supplied.

In addition, the air consumption during such operation is 48 to 60
It was 12/min.

Although one embodiment of the gob guide 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 guide device 26 in the embodiment described above, the inner circumferential surface 37 of the inner hole 28 was entirely composed of the porous member 46; Even in the case where the present invention is configured as follows, the effects of the present invention can be effectively exhibited. However, even if a part of the inner circumferential surface 37 is constituted by the porous member 46, in order to guide the gob 16 to the center thereof, the porous member 46 may be continuously or discontinuously spaced at equal intervals in the circumferential direction. , porous member 4
It is desirable to arrange 6.

Further, it is also possible to form only the inner circumferential surface 37 portion of the inner hole 28 in such a gob guide device 26 with the porous member 46, and cover the outer circumferential portion with a cylindrical member made of metal or the like. If such a structure is used, an air chamber is provided along the entire circumference between the back surface of the porous member 46 and the cylindrical member, and the holes 40 of the porous chamber member 46 are opened in the air chamber. , and by supplying compressed air into the hole 40 through the air chamber, the inner hole 28
It is also possible to equalize the fluid pressure of the pressure fluid ejected onto the inner circumferential surface 37 of.

Further, although the porous member 46 in the above embodiment was formed using the ceramic structure 42 having a three-dimensional network structure, its form is not limited, and in particular, as described above, If the porous member 46 is provided with an air chamber at the back, there is no need for the pores to communicate with each other in the porous member, and for example, a ceramic structure in the shape of a crest or a comb can be used. is also possible.

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

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing the overall structure of a glass forming apparatus for explaining the usage form of a gob guide apparatus to which the present invention is applied. FIG. 2 is a cross-sectional explanatory view (corresponding to the nn cross section in FIG. 3) showing a specific example of the gob guide device structured according to the present invention, and FIG. It is an I sectional view. Moreover, FIG. 4 is an enlarged cross-sectional explanatory view showing the main part of a ceramic structure suitably used in manufacturing such a gob guide device, and FIG. 5 is an explanatory diagram of a porous member formed using such a ceramic structure. FIG. 16: Gob (molten glass lump) 24: Molding mold 26: Gob guide device 28: Inner hole
36: Molding cavity 37: Inner peripheral surface 3
8: Skeleton 40: Hole 42: Ceramic structure 44:
Cast metal 46: Porous member 48: Screw hole
50: Connector

Claims (2)

[Claims] (1) A gob guide device in a glass forming machine, which is equipped with a guide hole through which a molten glass gob dropped from above passes, and guides the molten glass gob into a molding cavity of a predetermined mold placed below the guide hole. The skeleton itself, which forms a continuous skeletal tissue, is hollow,
By injecting a predetermined matrix material into the skeletal gaps in the ceramic structure in which pores are formed in the skeleton to form an integral structure, fluid can permeate through the pores formed in the skeleton. Using the porous member obtained in this manner, 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. At the same time, a supply flow path is provided which communicates with the holes and supplies a predetermined pressure fluid to the holes, and the pressure fluid supplied through the supply flow path is passed through the holes. A gob guide device characterized in that the jet is ejected onto the inner circumferential surface of a guide hole. (2) A patent in which the inner peripheral surface of the guide hole is entirely made of the porous member, and the holes in the porous member are opened over the entire inner peripheral surface. A gob guide device according to claim 1.