JPS5828826Y2 - mold for molding - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a molding die used for molding a synthetic resin container having a handle on its outer wall.

Synthetic resin containers used to store and transport multiple beer bottles, liquor bottles, etc. are integrally molded using a molding mold with split molds, but the handle structure of this type of container is attached to the periphery of the container. A hole is simply provided in a portion of the side wall.

Therefore, when carrying the container, the user has to hang his/her fingers on the handle formed of the above-mentioned through hole, which causes an inconvenience in that the fingers hit the corner of the handle and hurt the hand.

Therefore, after forming the container, the corners of the handles are rounded by post-processing to prevent them from hitting fingers, but this is not sufficient and the subsequent processing is extremely troublesome, requiring more man-hours and increasing costs. .

This idea was made based on the above circumstances, and its purpose is to provide a mover with an arcuate concave surface to form a handle, and to move the mover before opening the mold to create a radius. To provide a molding die that does not hurt hands and fingers when carried and is easy to mold by molding a handle to be held.

This invention will be explained below based on an embodiment shown in the drawings.

In Figure 1, 2 is a fixed mold, 2 is a movable mold, and 3 is a split mold.
A molding die for molding the molded product A is constructed from these.

That is, a mold surface for molding the bottom surface of the molded product A is formed in the fixed mold 1, and a gate 4 communicating with this mold surface is formed.
is provided.

Further, the movable mold 2 has a mold surface for molding the inner wall surface of the molded product A.

Further, the split mold 3 is provided to be divided into four parts around the movable mold 2, and four parts 6 for forming an undercut 5 on the molded product A are formed.

These split molds 3... are arranged so that adjacent pieces can be freely approached and separated, and the fixed mold 1
It is held movably along a guide rod 7 which is fixed and tilted outward.

Furthermore, the inner surface of each of the above split molds 3... and the movable mold 2
As shown in FIG. 2, a space 8 is formed on the outer surface of the holder.

A mover 9 is housed in the space 8, and an arcuate concave surface 10 forming the handle B of the molded product A is formed in the portion of the mover 9 that faces the movable mold 2 and the split mold 3. is formed.

Further, a sliding surface 11 consisting of an inclined surface is provided on the opposite surface of the arcuate concave surface 10 of the mover 9, and the sliding surface 11 has an opening narrower than the inside, that is, a T-shaped cross section. Matching groove 1
2 is engraved.

Further, the space 8 communicates with a guide hole 13 passing through the split mold 3, and an actuator 1 connected to a slide rod 15 of a cylinder 14 fixed outside is provided in the guide hole 13.
6 is slidably inserted.

This actuator 16 has a sliding surface 17 formed of an inclined surface at its tip.
The sliding surface 17 is provided with a projection 18 whose head that engages with the engagement groove 12 is wider than the opening of the engagement groove 12, that is, has a T-shaped cross section. Groove 12 and protrusion 18
This forms an inclined retaining portion.

The mover 9 is adapted to move in accordance with the movement of the actuator 16.

Next, the operation of the above embodiment will be explained.

With the stationary mold 1, movable mold 2, split mold 3, . . . in a closed state, the molten synthetic resin material passes through the gate 4 and fills the gap.

After the synthetic resin material filled in the gap solidifies, the slide rod 15 that has activated the cylinder 14 is moved back.

When the actuator 16 gradually moves outward along the inside of the guide hole 13 as the slide rod 15 slides, the mover having the engagement groove 12 that engages with the protrusion 18 of the actuator 16 9, sliding surfaces 11 and 17 come into sliding contact and gradually move in the direction of the arrow.

Then, the arcuate concave surface 10 of the mover 9 is separated from the handle B.

From this state, next move the movable mold 2 to the fixed mold 1.
When moving in the direction of separating the split molds 3 and 3,
...will also move.

However, since the split molds 3... move diagonally outward along the guide rod 7, each split mold 3... moves in a direction away from the molded product A.

Since the molded product A is finally held in a state where it is latched to the tip of the movable mold 2, the molded product with the handle B is removed by pulling the molded product A out of the movable mold 2. A is obtained.

In this way, a fixed mold 1, a movable mold 2, and a split mold 3 are used to mold the main body of the molded product A, that is, the plastic container.
Since the mover 9, which is unrelated to the operation of..., is provided, and the four arcuate surfaces 10 forming the handle B are formed on the mover 9, the portion of the handle B that touches the fingers can be formed into an arc shape. can.

As explained above, this invention forms a space between the inner surface of the split mold and the outer surface of the movable mold in a mold for molding a synthetic resin container with a handle, and the container is placed inside this space. A mover having an arcuate concave surface that forms the handle of is housed, and this mover is connected to a cylinder so that the mover is moved away from the handle before opening the mold, and then comes into contact with the fingers of the handle. The part can be molded into an arcuate surface with no corners, so that hands and fingers will not be hurt when carrying the container, and in addition to molding the main part of the container, the mover can be moved before opening the mold for molding the main part of the container. Therefore, the operation of the movable mold and the split mold is not hindered, and the molding work can be easily performed without applying excessive force to the molded product.

Moreover, with a simple structure in which the cylinder is attached to a split mold and the actuator is simply reciprocated, the mover can be released from the arcuate surface of the handle before opening the mold, making mold production easier and cheaper. can be provided to

[Brief explanation of the drawing]

The drawings show one embodiment of this invention; Fig. 1 is a longitudinal side view of a molding die, Fig. 2 is an enlarged cross-sectional view of the main parts,
FIG. 3 is an enlarged cross-sectional view of the inclined retaining portion. 1...Fixed mold, 2...Moveable mold, 3
...Split mold, 7...Guide rod, 8...
...Space part, 9...Mover, 10...
Arc-shaped concave surface, 12... Engagement groove, 14...
Cylinder, 16... Actuator, 18...
Projection.

Claims (1)

[Scope of utility model registration request] A fixed mold, a movable mold movable toward and away from the fixed mold, and a movable mold divided into a plurality of parts around the movable mold and attached to the fixed mold and tilted outward. In a mold for molding a synthetic resin container, the inner surface of the split mold located at the handle of the container and the outer surface of the movable mold are a space formed by cutting out and facing each other; a mover having an arcuate concave surface that is movably housed in the space along the side wall of the container and forms a handle of the container on one side; An actuator is provided inside the split mold so as to be slidable in a direction perpendicular to the mover, and an opening is provided along the sliding direction on the sliding surface between the actuator and the mover, and an opening is narrower than the inside. a retaining groove; on the other hand, a sloped retaining portion whose head has a protrusion wider than the opening of the engagement groove, and the engagement groove and the protrusion are slidably engaged; and the actuator. A molding metal comprising: a cylinder provided on the outside of a split mold, which is connected to a cylinder and is separated from a convex arc surface of a handle of a container via an actuator before opening the mold. Type.