JP4651566B2 - Mold equipment - Google Patents

Description

  The present invention relates to a mold apparatus including a finish mold that is formed into a pair of split molds and finish-molds a glass bottle or a mouth mold that molds a mouth portion of the glass bottle.

For example, as shown in FIG. 3, the bottle-making process is a step in which a gob is put into a rough mold b that is closed by embedding the mouth mold a in (a). The rough mold b in (b) is closed by the baffle c, and the gob is pressed or inflated by press-fitting of the plunger or air blow, and the shape of the mouth mold a, the rough mold b, and the baffle c is aligned as shown in (c). Forming the body of the parison p and the mouth of the bottle. After the formation of the parison p in (d), when the baffle c is retracted and the rough mold b is opened, the parison p held by the mouth mold a is opened by the reversing arm g of the invert mechanism f as shown by the solid line. The process of moving to the finished mold h side. (E) After that, when the finishing mold h is closed, the mouth mold a is opened, retracted from the finishing mold h, returned to the rough mold b side, and the parison p is left as it is for a predetermined time to finish the finishing mold h. The process of reheating inside. That is, a temperature imbalance in which the temperature of the outer surface is lower than the inner surface in contact with the rough mold b in the steps (b) and (c) is determined by moving the heat from the inside to the outside for a predetermined time. Process to correct. The parison p is inflated by blow from the blow head i applied in place of the mouth mold a to the finished mold h after the reheating in (f), and finish-molded into a bottle j along the appearance of the finish mold h. Process. (G) A step of taking out the finished molded bottle j by the take-out tongue k and transferring it to a conveyor or the like. (For example, refer to Patent Document 1). In addition, although the reheat process (f) is abbreviate | omitted by description in patent document 1, it is a conventionally known process and is employ | adopted as needed.
JP 2005-47153 A

  By the way, there are various types of glass bottles, such as narrow-mouthed glass bottles with a small mouth like normal beer bottles and wine bottles, and wide-mouthed glass bottles filled with powdered products such as coffee. Mouth molds and finish molds according to the type are used. In addition, in applications where powder is filled in a wide-mouth glass bottle, a seal is attached to the top surface by ultrasonic welding or the like. In this case, a sticking failure or a sealing failure sometimes occurs.

  As a result of various studies on such a phenomenon, the present inventor repeatedly examined the phenomenon by forming the top surface of the glass bottle j with a flat appearance surface in the mouth mold a as recognized in Patent Document 1. In spite of this, the top surface of the bottled glass bottle j is caused by the undulation in which a concave m having a part slightly depressed by ΔH is formed as schematically shown in FIGS. I found out.

  Therefore, various causes are repeatedly verified for the cause of such a wave, and the position of the concave shape m substantially corresponds to the joint mark n formed by the split joint of the mouth mold a and the finishing mold h. In the mold a and the finishing mold h, it has been found that there is a temperature difference between the joint portion of the split mold and the portion perpendicular to the joint portion. Further, this temperature difference is the difference in the movement of the parison p due to the temperature difference between the parison p and the peripheral wall of the glass bottle j in the process from the reheating step (f) after the parison p to the finishing mold h. More specifically, it seems to be caused by the difference in the movement of the parison p in the circumferential direction in the gravitational direction. The cooling air is hard to hit the split joint, so the temperature of the parison p is higher in the direction of gravity. It is consistent with the fact that meat is easy to move.

  As a result of such knowledge, the present inventors have found a technique capable of correcting or canceling the difference in meat movement of the parison p in the circumferential direction and smoothing the top surface of the bottle.

  An object of the present invention is to provide a mold apparatus capable of producing a bottle so that the top surface of the glass bottle is smooth based on the above-described new knowledge.

In order to achieve the above object, a mold apparatus of the present invention is a mold apparatus having a finishing mold that is formed into a pair of split molds and finish-molds a glass bottle, and the finishing mold is on the top surface. One feature is that at least a predetermined portion in the circumferential direction around the appearance surface is formed in a concave shape by a height change in the circumferential direction .

In such a configuration, the parison is moved by the mouth mold, closes the finishing mold, involves retraction of the mouth mold, and performs the reheating process and the finishing process. Because the part is concave due to the height change in the circumferential direction, the restraining force in the circumferential direction against the parison mouth is weakened or eliminated in the gravitational direction and radial direction at the concave corresponding part compared to the non-concave corresponding part. Therefore, by making the concave part correspond to the part that can not be concaved on the top surface of the glass bottle, the meat movement of the parison in the gravity direction of the part that can not be concave due to the temperature difference in the circumferential direction on the bottle is promoted. Can absorb the difference between the movement of the parison in the direction of gravity and the difference in the cause of the temperature difference in the circumferential direction due to the temperature difference in the circumferential direction on the bottle. To realize .

Further, the mold apparatus of the present invention is a mold apparatus provided with a mouth mold that is formed into a pair of split molds to mold the mouth part of the glass bottle, wherein the mouth mold forms the mouth part of the glass bottle. Another feature is that a predetermined portion in the circumferential direction on the top surface side of is formed in a concave shape due to a height change in the circumferential direction .

In such a configuration, a concave portion due to a change in the circumferential height formed in a predetermined portion in the circumferential direction on the top surface side of the figure forming the mouth portion of the mouth-shaped glass bottle is formed at the time of parison molding. The mouth of the glass bottle formed by the mouth mold by molding the part where the predetermined part in the circumferential direction on the top side of the mouth of the glass bottle is not completely aligned with the shape of the mouth mold like other circumferential parts By reducing or eliminating the circumferential restraining force in the concave corresponding part in the gravity direction and the radial direction compared to the non-concave corresponding part, or by eliminating the concave part on the top surface of the glass bottle, Accelerates the movement of the parison in the direction of gravity in the part that cannot be recessed due to the temperature difference in the circumferential direction on the bottle, and the direction of gravity in the part that becomes concave due to the temperature difference in the circumferential direction on the bottle Absorbing the difference with parison meat transfer to It can be achieved regardless of the differences of the causes that can be a temperature difference in the circumferential direction.

In a further configuration, wherein the predetermined portion is a portion in a direction perpendicular to the seam in the finishing die or the mouth die,
To cope with the case where the concave part formed in the circumferential direction on the top surface of the glass bottle produced is caused by the higher temperature than the part in the direction perpendicular to this at the joint of the finish mold, rough mold and mouth mold. it can.

According to one feature of the mold apparatus of the present invention, and now one feature, the circumferential direction on the bottle is formed by a concave portion formed by a change in the circumferential height at a predetermined circumferential direction portion of the finishing die or the mouth die. It is possible to eliminate the concave shape formed on the top surface of the glass bottle produced due to the temperature difference, and to smooth the bottle, thereby eliminating problems such as poor sealing.

  The concave part that can be formed on the top of the bottled glass bottle is a direction perpendicular to the joint of the finish mold, rough mold, and mouth mold, with the predetermined part as the part perpendicular to the joint of the finish mold or mouth mold. This can correspond to a case where the temperature is higher than that of the part.

  Hereinafter, a mold apparatus according to an embodiment of the present invention will be described with reference to FIG. 1 and FIG. 2 for understanding of the present invention. The following description and illustrations are specific examples of the present invention and do not limit the contents described in the claims.

As shown in FIG. 1, the mold apparatus according to the present embodiment includes a finishing mold 1 that is formed in a pair of split molds 1a and 1b and finish-molds a glass bottle j. In the finishing die 1, at least a predetermined portion in the circumferential direction around the appearance surface 1 d on the top surface 1 c is formed in the concave portion 1 e by a change in the height in the circumferential direction . In this way, the parison (not shown) is moved by the mouth mold 2 with the split molds 2a and 2b closed, and the finishing mold 1 is closed and the mouth mold 2 is retracted. When the finishing die 1 is formed with a concave portion 1e at least around the appearance surface 1d on the top surface 1c, the maximum height H below the mouth j1 formed in the parison is unconstrained. Region k1 will be created. As a result, the restraining force in the circumferential direction is weakened or eliminated in the gravity direction and the radial direction in the non-restraining region k1 corresponding to the concave portion 1e as compared to the constraining region k2 being a non-corresponding portion of the concave portion 1e. By making the concave portion 1e correspond to the portion n where the concave shape m cannot be formed on the top surface of the glass bottle j, the meat of the parison in the gravity direction of the portion n where the concave shape m cannot be formed due to the temperature difference in the circumferential direction on the bottle. The cause of the temperature difference in the circumferential direction, which can absorb the difference between the movement of the parison in the direction of gravity and the movement of the parison in the direction of gravity due to the temperature difference in the circumferential direction on the bottle. Realized regardless of the difference. As a result, the concave portion 1e formed at a predetermined portion in the circumferential direction of the finishing die 1 can be formed on the top surface of the glass bottle j due to a temperature difference in the circumferential direction on the bottle making as shown in FIGS. Such a concave shape m can be eliminated and smoothed. Therefore, problems such as a seal failure can be solved.

  Here, the predetermined portion forming the concave portion 1e is a portion in the direction YY perpendicular to the direction XX of the joint 1g in the finishing die 1 as shown in FIGS. Then, the concave shape m formed in the circumferential direction on the top surface of the bottled glass bottle j is a direction perpendicular to the direction XX at the joints 1g, 2g of the finishing die 1, the rough die (not shown) and the mouth die 2 etc. This can correspond to a case where the temperature is higher than the Y-Y portion.

  In one embodiment, the top surface 1c of the finishing mold 1 is developed as shown in FIG. 2, and the seam 1g, 1g from the seam 1g toward the center side has a large radius R centered on the seam 1g. The crowning from the seam 1g on the downwardly convex crowning curved surface 1i with the large radius R centered on the center line 1i between the seam 1g and the rounded surface 1h gradually descending on the upward convex crowning curved surface The height of the concave m before improvement is such that the height H is 0.2 mm lower at the position of the center line 1i than the height at the joint 1g with the rounded surface 1j that is connected to the surface and gradually falls to the center line 1i. The maximum ΔH was about 0.30 mm to 0.35 mm and the minimum was about 0.19 mm to 0.25 mm. However, after improvement, the maximum ΔH was about 0.25 mm to 0.30 mm and the minimum was 0.18 mm. ~ 0.15m The improvement was greatly improved to about m, and the occurrence of defective sticking of seals was greatly reduced.

Moreover, in the mold apparatus provided with the mouth mold 2 that is formed in the pair of split molds 2a and 2b and molds the mouth j1 of the glass bottle j, the mouth mold 2 forms the mouth j1 of the glass bottle j. can be assumed that the circumferential direction by a predetermined portion of the top surface 2c side of the surface 2d is the circumferential direction of the height change is recessed portion 2e as shown in FIG. 1 (a). Thereby, the concave part 2e formed in the predetermined part of the circumferential direction by the side of the top | upper surface 2c in the figure surface 2d which forms the opening | mouth part j1 of the glass bottle j of the mouth mold 2 of the glass bottle j shape | molded at the time of parison molding. A glass formed by molding the mouth mold 2 by forming a portion where the predetermined portion in the circumferential direction on the top surface 2c side of the mouth portion j1 is not completely separated from the shape surface 2d of the mouth mold 2 like the other circumferential portions. Since the restraining force in the circumferential direction with respect to the mouth j1 of the bottle j is weakened or eliminated in the gravity direction and the radial direction in the concave corresponding part k1 as compared with the non-concave corresponding part k2, the concave part 2e is formed on the top surface of the glass bottle j. Corresponding to the part where the concave shape cannot be made, it promotes the movement of the parison in the direction of gravity of the part where the concave shape cannot be made due to the temperature difference in the circumferential direction on the bottle, and the temperature difference in the circumferential direction on the bottle. The portion of the concave part caused by Can absorb the difference between the meat movement Son, I realized regardless of the differences of the causes that can be a temperature difference in the circumferential direction.

  Therefore, also in this case, the predetermined portion forming the concave portion 2e is a portion in the direction YY perpendicular to the direction XX of the joint 2g in the mouth mold 2 as shown in FIG. Then, the concave shape m formed in the circumferential direction on the top surface of the bottled glass bottle j is a direction perpendicular to those directions XX at the joints 1g, 2g, etc. of the mouth mold 2, the rough mold (not shown) and the finishing mold 1. This can correspond to a case where the temperature is higher than the Y-Y portion.

However, in the mold apparatus provided with the mouth mold 2 that is formed into a pair of split molds and molds the mouth j1 of the glass bottle j, the mouth mold 2 is not shown, but the mouth j1 of the glass bottle j is It can also correspond that the predetermined part in the circumferential direction of the top surface 2c of the appearance surface 2d to be molded is formed as a concave portion. If it does in this way, the recessed part currently formed by the height change of the circumferential direction in the predetermined part of the circumferential direction in the top | upper surface 2c of the surface 2d which shape | molds the mouth part j1 of the glass bottle j of the mouth mold 2 will be parison molding. Since the convex part which becomes higher than the other circumferential direction part will be shape | molded in the circumferential direction predetermined part of the opening | mouth part j1 top | upper surface of the glass bottle j sometimes molded, the concave part of the mouth mold 2 is formed on the periphery of the bottle. Corresponding to the portion where the concave shape m is formed on the top surface of the glass bottle j due to the temperature difference in the direction, such concave shape m is absorbed by the previously-formed convex shape portion and offset. This is realized regardless of the difference in the cause of the temperature difference in the circumferential direction.

  In this case, the predetermined portion is the direction XX of the seam 2g in the mouth mold 2, so that the concave shape m formed in the circumferential direction on the top surface of the bottled glass bottle j is the finishing mold 1, the rough mold not shown, and This can be dealt with when the seam 1g of the mouth mold 2 has a higher temperature than the portion in the direction YY perpendicular to the direction XX in the direction 2X.

  INDUSTRIAL APPLICABILITY The present invention can be practically used for making bottles, and can reduce the occurrence of concave portions on the top surface of glass bottles that are currently produced in the process of making bottles.

(A) is a perspective view which shows the relationship between the finishing mold and the mouth mold of the mold apparatus according to the embodiment of the present invention, and the glass bottle after the bottle making, (b) is a mark to match the glass bottle after the bottle making The front view which shows the top surface shape seen from the side, (c) is a partial front view which shows the relationship between the metal mold | die apparatus of (a), and a glass bottle. It is an expanded view which shows the Example of the top | upper surface shape in one split type of the finishing die of the metal mold apparatus of FIG. It is explanatory drawing which divides and shows the conventionally known bottle making process into (a)-(g).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Finish type | mold 1a, 1b Split type | mold 1c Top surface 1d Form surface 1e Concave part 1g Joint 1h, 1j Earl surface 2 Mouth type 2a, 2b Split type 2c Top surface 2d Form surface 2e Concave part 2g Joint j Glass bottle j1 mouth Part m Concave n Joint mark XX Joint direction YY Joint perpendicular direction

Claims (3)

In a mold apparatus having a finishing mold that is formed into a pair of split molds and finish-molds a glass bottle,
The finishing die is a mold apparatus characterized in that at least a predetermined portion in the circumferential direction around the appearance surface on the top surface is formed in a concave shape by a change in the circumferential height . In a mold apparatus provided with a mouth mold that is formed into a pair of split molds to mold the mouth of a glass bottle,
The mouth mold is a mold apparatus characterized in that a predetermined portion in the circumferential direction on the top surface side of the figure forming the mouth portion of the glass bottle is formed in a concave shape by a change in the height in the circumferential direction .   The mold apparatus according to claim 1 or 2, wherein the predetermined portion is a portion in a direction perpendicular to the joint in the finishing die or the mouth die.

Images