KR100250624B1 - Plunger apparatus for forming hollow glassware - Google Patents

Abstract

PURPOSE: A plunger for forming hollow glasses is provided, which is characterized by having at least one cooling hole to keep a temperature distribution of formed surface constant, resulting in reduction of inferior glass products. CONSTITUTION: The plunger device comprises the parts of: a plunger(33) having a formed surface for forming inner walls of hollow glass products, which is bound to a plunger head(21), being installed to go up and down against a lower mold(13), in one; a cooling water distribution part(35), leaving a cooling water distribution space(36) from the plunger, between plunger and plunger head for dividing cooling water supplied from the plunger head into the cooling water distribution space; at least one cooling hole(41,42), being outward from the fluid distribution space, on the plunger.

Description

Plunger device for forming hollow glass products

The present invention relates to a plunger device for forming a hollow glass product, and more particularly, is coupled to the lifting and lowering integrally to the plunger head which is installed to be movable up and down with respect to a lower mold for forming a region of the hollow glass product. The cooling fluid distribution space receives a cooling fluid from the plunger head and is coupled between the plunger head and the plunger with a plunger having a molding surface formed to form an inner wall surface of the glass product, and the plunger and the cooling fluid distribution space. It relates to a plunger device for forming a hollow glass product having a fluid distribution member for dispensing.

Generally, a cathode ray tube has a panel on which an image is projected, a funnel coupled to the rear of the panel, and a neck coupled to the funnel with an electron gun.

Forming the funnel having a funnel shape is made by pressing the glass gob provided from the glass melting furnace with a molding apparatus which makes the glass raw material from the glass melting furnace into a predetermined molten state, and forms the shape of the funnel.

Figure 4 is a partial longitudinal cross-sectional view of a conventional molding apparatus for a hollow glass product having a plunge storage for forming a hollow glass product, Figure 5 is an enlarged view of the funnel of FIG. As shown in these figures, the funnel 101 has a funnel-shaped main body 103, and one side of the main body 103 is formed with a joint end portion 105 in which a joint end surface with a panel (not shown) is formed. The other side is gradually reduced in width along the axial direction and the nose portion 107 protruding along the axial direction is formed in the central region.

The molding apparatus of the funnel 101 is disposed on a turntable (not shown) rotatably provided to form a lower mold 113 for forming the outer surface of the main body 103 and the nose portion 107 of the funnel 101, Plunger apparatus for press forming the square loop shell mold 115 disposed on the mold 113 to form the bonded end surface 105 of the funnel 101 and the glass gob supplied on the lower mold 113. Has 131.

The lower mold 113 is fixedly coupled to the pedestal 111 fixedly disposed on the turntable, and a plate-shaped adapter 117 is coupled to a lower end of a ram (not shown) installed to be liftable with respect to the turntable.

The plunger head 121 is coupled to the lower side of the adapter 117, and the plunger device 131 is coupled to the lower end of the plunger head 121 so as to be movable up and down integrally.

The plunger device 131 has a cooling water distribution space 136 formed between the plunger 133 and the plunger 133 having a molding surface formed thereon so as to press the glass gob to form the inner wall surface of the funnel 101. It is interposed between the plunger 133 and the plunger head 121 to be formed and has a coolant distribution member 135 to receive the coolant from the plunger head 121 to distribute toward the plunger 133.

The cooling water distribution member 135 has a cooling water accommodating space 138 formed therein so as to accommodate the cooling water supplied from the plunger head 121, and to spray the cooling water toward the cooling fluid distribution space 136. A plurality of distribution holes 139 are formed through the plate surface.

The adapter 117 and the plunger head 121 are formed with a cooling water supply path 141 and a cooling water discharge path 142 so that the cooling water can be circulated, and the nose portion of the funnel 101 is formed in the plunger head 121. An air supply passage 143 and an air discharge passage 144 for supplying air to the distal region of the plunger 133 corresponding to 107 are formed, respectively. A cylindrical plug 147 is accommodatingly coupled between the cooling water distribution member 135 and the plunger head 121, and an air supply pipe 151 is connected to the air supply path 143 under the plug 147. The air discharge pipe 153 is provided outside the air supply pipe 151 so as to surround the air supply pipe 151.

By this configuration, when the glass gob is provided on the lower mold 113 from the glass melting furnace, the plunger device 131 is lowered so that the forming surface of the plunger 133 is in contact with the glass gob to press the glass gob to a predetermined pressure. do. At this time, the cooling water distribution member 135 is supplied with cooling water through the cooling water supply path 141 formed in the adapter 117 and the plunger head 121 to be accommodated in the cooling water receiving space 138, and the received cooling water is divided into a plurality of distributions. It is injected into the cooling water distribution space 136 through the ball 139 to cool the plunger 133. The cooling water that has performed the cooling operation in the cooling water distribution space 136 is discharged to the outside through the cooling water discharge path 142. At the same time, the cooling air is supplied to the air supply pipe 151 along the air supply path 143 formed in the plunger head to cool the nose forming region of the plunger 133, and the air discharge pipe 153 and the air discharge path 144. It is discharged to the outside through.

By the way, in the conventional plunger apparatus for forming a hollow glass product, the upper region of the funnel, more specifically, the region C 15 to 30 mm apart along the axial direction from the joining end face of the funnel, is thicker than the peripheral region. Since it is formed thick, the flowability of the glass due to the cooling speed difference may cause a phenomenon that the glass flows downward.

In addition, the outer circumferential surface of the plunger corresponding to the area D spaced 30 to 40 mm apart along the axial direction from the joint end surface of the funnel is projected, so that heat from the surroundings is concentrated. Therefore, in the region D of the funnel, there is a problem in that the funnel fusion occurs due to the temperature rise of the plunger.

Accordingly, an object of the present invention is to provide a plunge storage value for forming a hollow glass product that can properly maintain the temperature distribution of the molding surface and prevent the defect of the hollow glass product due to the temperature dispersion of the molding surface.

1 is a partial longitudinal sectional view of a forming apparatus of a hollow glass product having a plunge storage for forming a hollow glass product according to the present invention;

2 is an enlarged view of the funnel of FIG. 1, FIG.

3 is an enlarged view of the plunger of FIG. 1, FIG.

Figure 4 is a partial longitudinal cross-sectional view of a molding apparatus of a hollow glass product having a plunge storage for molding a conventional hollow glass product,

5 is an enlarged view of the funnel of FIG. 4.

* Explanation of symbols for the main parts of the drawings

13: lower mold 15: shell mold

21: plunger head 31: plunger device

33: Plunger 35: Cooling water distribution member

36: cooling water distribution space 37: the body forming part

39: nose molding 41,42: cooling hole

43: cooling water receiving space 45: distribution hole

47: plug

The object is, in accordance with the present invention, is coupled to the lifting and lowering integrally to the plunger head which is installed to be liftable with respect to the lower mold for forming a region of the hollow glass product and to form the inner wall surface of the hollow glass product The formed plunger and a hollow glass product having a plunger and a cooling fluid dispensing space and a fluid dispensing member that is received between the plunger head and the plunger and receives a cooling fluid from the plunger head to distribute the cooling fluid to the cooling fluid dispensing space. In the molding plunger device, the plunger is achieved by a plunger device for forming a hollow glass product, characterized in that the plunger is formed with at least one cooling hole drilled outward from the cooling fluid distribution space to a predetermined depth.

Here, the fluid distribution member is preferably formed with a cooling fluid distribution hole penetrating toward the cooling hole from the fluid receiving space corresponding to the cooling hole.

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

1 is a partial longitudinal cross-sectional view of a hollow glass product molding apparatus having a plunge storage for forming a hollow glass product according to the present invention, Figure 2 is an enlarged view of the funnel of Figure 1, Figure 3 is an enlarged view of the plunger of Figure 1 . As shown in these figures, the funnel 1 has a funnel-shaped main body 3, and joining end portions 5 and nose portions 7 are formed at the upper and lower ends of the main body 3 along the axial direction, respectively. Formed.

The molding apparatus of the funnel 1 has a turntable not shown which is rotatably installed and a ram which is not shown which is installed so as to be able to move up and down relative to the turntable. On the turntable, a plurality of pedestals 11 are spaced apart from each other, and on the pedestal 11, a lower mold 13 for molding the outer surface of the main body 3 and the nose portion 7 of the funnel 1 is installed. It is. On the lower mold 13, a rectangular loop shell mold 15 for forming the bonded cross section 5 of the funnel 1 is arranged.

On the other hand, the lower end of the ram is formed of a plate-like member and penetrates the plate through which the coolant supply hole 18 and the plurality of coolant discharge holes 19 respectively formed are coupled, the lower end of the adapter 17, the adapter ( In response to 17), a plunger head 21 having a cooling water supply passage 22 and a cooling water discharge passage 24 is formed. The plunger head 21 is provided with an air supply path 25 and an air discharge path 27 so as to supply cooling air, and the glass supplied on the lower mold 13 at the lower end of the plunger head 21. Plunger device 31 according to the present invention is coupled to press the gob.

In the plunger device 31, a cooling water distribution space 36 is formed between the plunger 33 and the plunger 33 having a molding surface formed on the outer side so as to press the glass gob to form the inner wall surface of the funnel 1. It is interposed between the plunger 33 and the plunger head 21 to be formed and has a coolant distribution member 35 to receive the coolant from the plunger head 21 to distribute toward the plunger 33.

The cooling water distribution member 35 is provided with a cooling water receiving space 43 recessed from the upper surface to temporarily receive the cooling water supplied from the plunger head 21, and sprays the cooling water toward the cooling water distribution space 36. A plurality of distribution holes 45 are formed to penetrate through the plate surface. Inside the cooling water distribution member 35 is a plug 47 having a cooling water branch passage 49 formed therein so as to communicate with the cooling water supply passage 22 of the plunger head 21, and an axis line below the plug 47. The air supply pipe 51 is provided along the direction. An air discharge pipe 53 is provided outside the air supply pipe 51 so as to surround the air supply pipe 51.

On the other hand, the outer side of the plunger 33 has a main body forming part 37 for forming the inner wall surface of the main body 3 of the funnel 1 and a nose molding part 39 for forming the nose part 7 of the funnel 1. Each is formed. The plunger 33 is recessed from an upper surface of the plunger 33 so that the cooling fluid distribution space 36 can be formed, and is spaced a predetermined distance along the axial direction from the joint end surface portion 5 of the funnel 1. The plurality of cooling holes 41 and 42 recessed to a predetermined depth to the outside is formed.

Here, the cooling holes 41 and 42 are preferably formed in a region A 15 to 40 mm away from the joint end surface portion 5, and in particular, the upper cooling holes 41 in the 15 to 30 mm region. Preferably, the lower cooling hole 42 is formed in the 30 to 40 mm area from the joint end surface portion 5. In addition, it is effective that these cooling holes 41 and 42 are formed by drilling.

In addition, some of the distribution holes 45 formed in the cooling water distribution member 35 are formed to allow the cooling water to be injected from the cooling water receiving space 43 corresponding to each cooling hole 41 of the plunger 33.

With this configuration, when the glass gob is provided on the lower mold 13 from the glass melting furnace, the plunger device 31 descends to contact the glass gob and presses the glass gob at a predetermined pressure. At this time, the cooling water distribution member 35 receives the cooling water through the cooling water supply hole 18 of the adapter 17 and the cooling water supply path 22 of the plunger head 21, and the received cooling water is provided with a plurality of distribution holes ( 45 is injected into the cooling water distribution space 36 to cool the plunger 33.

Cooling water is injected into the cooling holes 41 and 42 formed in the plunger 33 so that the peripheral area of the cooling holes 41 and 42 can be sufficiently cooled. The cooling water that has performed the cooling operation in the cooling water distribution space 36 is discharged through the cooling water discharge path 24 and the cooling water discharge hole 19.

At the same time, the cooling air is supplied to the nose molding portion 39 of the plunger 33 through the air supply passage 25 and the air supply pipe 51 formed in the plunger head 21 to perform a cooling operation. do. The air that has performed the cooling action is discharged through the air discharge pipe 53 and the air discharge passage 27.

As such, by forming at least one cooling hole recessed outwardly from the cooling fluid distribution space to a predetermined depth in the plunger, the temperature distribution of the molding surface of the plunger can be properly maintained to prevent the failure of the funnel.

As described above, according to the present invention, there is provided a plunger apparatus for forming a hollow glass product that can properly maintain the temperature distribution of the molding surface to prevent a defect of the hollow glass product due to the temperature dispersion of the molding surface.

Claims (2)

A plunger integrally mounted to a plunger head which is provided to be liftable with respect to a lower mold forming a region of the hollow glass product, the plunger having a molding surface formed to form an inner wall surface of the hollow glass product, and the plunger and cooling In the plunger device for forming a hollow glass product having a fluid distribution space, the fluid plunger is received between the plunger head and the plunger and receives a cooling fluid from the plunger head to distribute the cooling fluid to the cooling fluid distribution space. The plunger is a plunger device for forming a hollow glass product, characterized in that the plunger is formed with at least one cooling hole drilled to a predetermined depth from the cooling fluid distribution space toward the outside. (correction) The method of claim 1, And a cooling fluid distribution hole formed in the fluid distribution member, the cooling fluid distribution hole penetrating from the fluid receiving space toward the cooling hole corresponding to the cooling hole.