JPH0611654B2 - Mold for glass tumbler with recess - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to the blow-molding of a glass tumbler,
The present invention relates to a glass tumbler forming die having a recess for automatically forming a product having a concave twist pattern on the lower part of the body.

(Prior art) As an automatic blowing machine for a glass tumbler,
It is known that a parison is rotated and blow-molded in a plurality of molds provided on a rotary table called a Hartford 28 machine, but it is not possible to form a concavo-convex pattern on the body in the above device. It was possible. Therefore, the applicant provided a cylinder-actuated pin on the side surface of the mold,
A technique for forming a recess on the side surface of the tumbler with the pin was developed and filed previously. However, in the previous method, there is a problem that malfunction occurs due to air leakage of the cylinder and the amount of recess is not constant and production efficiency deteriorates, and only the small one can be installed due to the restriction of the installation space of the cylinder. There is a problem that it is not possible to form a wide recess due to insufficient thrust of the cylinder.

On the other hand, in artificial blow molding or off-line secondary processing molding, a concave twist pattern (2
It is possible to mold the glass tumbler (21) having 2), but there is a problem that it cannot be mass-produced and the price becomes extremely high.

(Problems to be Solved by the Invention) The present invention solves the conventional problems as described above and allows a glass tumbler having a concave twist pattern in the lower part of the body to be efficiently and continuously formed into a concave portion. The present invention has been completed to provide a mold for a glass tumbler having

(Means for Solving the Problems) The present invention made to solve the above problems is achieved by rotating a cam floor on the outer circumference of a ring-shaped base provided at the lower end of a blow-molding finishing die of a glass tumbler. A pair of moving semi-circular links are provided, each link has an arm with a straight tip, and the lower part of the finishing die slides toward the center while maintaining a constant angle with respect to the vertical axis. Is mounted, and the distal end portion of the arm is engaged with the elongated hole formed in the pressing plate so that the pressing plate moves back and forth by the rotation of the link.

(Example) Next, the present invention will be described in detail with reference to the illustrated example.

The drawing shows a finishing blow mold (1) for blow blow molding of a glass tumbler used in a so-called blowing machine that blows compressed air against a plate-shaped glass gob on a work table to form a parison. The bottom mold (2) is fitted in the same structure as the conventional one, but a ring-shaped base (3) is further provided. And, a pin fixed by a supporting member (4) to the outer periphery of the base (3)
A pair of semi-circular links (6) that rotate around (5) are attached, and the link (6) is located on the seam of one mold.
A cam floor (7) that overlaps with and projects outward is provided. Further, a connecting member (8) is vertically provided at the center of each link (6), and a tip portion (9) is provided at the tip of the connecting member (8).
A semi-arcuate arm (10) having a linear shape and arranged along the outer periphery of the finishing die (1) is attached.

On the other hand, in the lower part of the finishing die (1), a longitudinal groove (11) is formed which is inclined at a constant angle with respect to the vertical axis and is divided into four equal parts in the circumferential direction, and in the longitudinal groove (11). The pressing plate (12) has its lower end placed on the base (3) and is mounted so as to be able to slide radially toward the center. Further, a rear portion of the pressing plate (12) is projected to the outside of the finishing die (1) and a long hole (13) is formed, and the link (6) of the link (6) is formed in the long hole (13). The linear tip portion (9) of the arm (10) is engaged so that the pressing plate (12) moves back and forth due to the rotation.

(Operation) In the structure thus constituted, the parison (20) held on the work table (14) as shown in FIG.
It is the same as the conventional one that is blow-molded in the finishing die (1), but the link (6) is open to both sides around the pin (5) by its own weight.
Therefore, since the arm (10) is also opened outward, the linear tip (9) moves upward in the elongated hole (13) of the pressing plate (12), which causes the pressing plate. (12) is a finishing type
It is in a state of being slid outward in the longitudinal groove (11) of (1). As a result, the tip of the pressure plate (12) is
The parison (20) is smoothly rotated and blow-molded without protruding to the inner surface side of (1).

Next, as shown in FIG. 2, after the rotation of the parison (20) is stopped at the final stage of the above-mentioned blow molding process,
The cam floor (7) is pushed downward by an external cam mechanism (not shown). At this time, the above link
(6) rotates about the pin (5) and the arm (10) moves so as to close toward the inside of the mold, and the tip (9) is inside the elongated hole (13) of the pressing plate (12). Will be pressed downwards. As a result, the pressing plate (12) is the longitudinal groove (11) of the finishing die (1).
It will be slid toward the inside, and the tip of the pressing plate (12) will protrude to the inner surface side of the finishing die (1) to form a concave twist pattern (22) on the lower part of the body of the tumbler (21). It will be.

After that, when the pressure on the cam floor (7) is released, the link
(6) will open again on both sides due to its own weight, and the pressing plate
The tip of (12) also retreats backward from the inner surface of the finishing die (1), and when the finishing die (1) is opened and the glass product is taken out at a predetermined position, the finishing die (1) We will wait for the parison insertion.

In this way, the pressing plate (12) is guided so that the lower end portion is placed on the base (3) and slides in the longitudinal groove (11) of the finishing die (1). 12) The retracting operation is reliable, and the occurrence of kinking is prevented. Moreover, since it is operated by a cam, a certain amount of recessed pattern can be surely formed without air leakage unlike a cylinder. In addition,
The shape of the tip of the pressing plate (12) or the tip of the arm
By adjusting the angles of the long holes (13) of the pressing plate (12) and the pressing plate (12), the concave twist pattern (22) formed in the lower part of the body can be set to an arbitrary shape.

(Effects of the Invention) As is clear from the above description, in the present invention, a glass tumbler having a concave twist pattern, which can only be conventionally formed by artificial molding or secondary processing, is efficiently and continuously formed automatically. As a mold for a glass tumbler having a concave portion which solves the conventional problems, it greatly contributes to the development of the glass product manufacturing industry.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a partially cutaway front view when inserting a parison, FIG. 2 is a partially cutaway front view when forming a recess pattern, and FIG. 3 is a bottom view of FIG. FIG. 4 is a partially cutaway front view of a glass tumbler having a concave twist pattern. (1): Finishing type, (3): Base, (6): Link, (7): Cam floor, (10): Arm, (12): Press plate, (13): Long hole.

Claims (1)

[Claims] 1. A pair of semi-circular links which are rotated by a cam floor (7) on the outer circumference of a ring-shaped base (3) provided at the lower end of a blow-molding finishing die (1) of a glass tumbler. 6) is provided, and each link (6) has an arm (10) with a linear tip (9) attached to it, while the lower part of the finishing die (1) maintains a constant angle with respect to the vertical axis. A pressing plate (12) that slides toward the center is attached, and the pressing plate (12) is moved back and forth by the rotation of the link (6) in the long hole (13) formed in the pressing plate (12). A glass tumbler mold having a recess characterized in that the tip (9) of the arm (10) is engaged.