JPH0126424Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a mold for molding a container made of a polymeric material, which is provided with projections on at least one of the container body and the lid body for locking them together. It is something.

Prior art and its problems A mold for molding a container having a locking protrusion on at least one of the container body and the lid is a movable mold as disclosed in, for example, Japanese Patent Application Laid-Open No. 77664/1983. The slide block has a slide block movable in a direction perpendicular to the direction of movement of the slide block, and a recess for forming a locking protrusion is provided in the slide block.

When molding a container using such a mold,
Due to differences in molding equipment, the type of polymer material used, changes in injection molding conditions, etc., the dimensional relationship between the container body and the lid may be distorted, resulting in the locking strength of the locking part becoming low or becoming excessively strong. It becomes high strength.
By the way, it goes without saying that it is desirable that the lid can be opened and closed with a moderate and constant force, and for example, in the case of compact cosmetic containers, if the locking strength is low, there is a risk that the lid will open inside the handbag and the contents will scatter. On the other hand, if the locking strength is too high, it will require more force than necessary to open and close the container, causing strain on the container and causing damage. Must be able to open and close.

As a countermeasure, it is necessary to adjust the locking strength for each product after molding and assembly, but this is extremely complicated and impractical. Further, adjusting the locking strength by adjusting the mold is also disclosed in, for example, Japanese Utility Model Publication No. 57-54726, Japanese Utility Model Publication No. 58-26108, and Japanese Utility Model Application Publication No. 57-136726. These are the above-mentioned Japanese Unexamined Patent Publication No. 54
-In contrast to the slide block disclosed in Publication No. 77664, which requires replacing the entire slide block with one with a different depth of recess, only the part where the locking protrusion is molded has a protrusion whose position can be adjusted. By setting the mold, moving the protrusion mold forward and backward, and adjusting the height of the locking protrusion, a container with a constant locking strength can be molded, making it possible to use one mold effectively. And it can be used economically. However, in these methods, a guide hole is provided in the slide block, the protrusion mold is inserted into the guide hole, and the protrusion mold is moved forward and backward using a screw rod directly or through an inclined surface, and the mold is long and small. The guide hole has to be set accurately, which is difficult to process.
There are problems such as the fact that the mold must be almost completely disassembled to operate the screw rod, which requires a great deal of effort for adjustment.

Purpose of the invention The present invention solves the problems mentioned above, and allows the position of the recess for forming the locking protrusion to be changed by finely adjusting the slide block from the outside without the need to disassemble the mold. The purpose of the present invention is to provide a mold for molding containers that is easy to adjust.

Means for Solving the Problems The present invention provides a mold for molding a container made of a polymeric material, which has protrusions on at least one of the container body and the lid for locking them together. a slide block provided with a recess forming a protrusion and movable in a direction perpendicular to the direction of movement of the movable mold;
an adjustment block that contacts the slide block on an inclined surface and is movable in a direction perpendicular to the direction of movement; a spring that presses the slide block against the adjustment block on the inclined surface; and an adjustment block that moves the adjustment block. In addition, a means for solving the above-mentioned problems is provided by providing an adjustment screw screwed into a mold member provided with an adjustment block for fixing it in a predetermined position.

Embodiment An embodiment of the present invention will be explained based on the drawings. In FIG. 1, 1 is a core plate, 2 is a core, 3 is a core side nest, 4 is a cavity plate, 5 is a cavity side nest, and 6 is a runner. In the tripper plate, molten polymeric material is supplied through a sprue 7 and a gate 8 to a cavity 9 to form a container body or a lid. The cavity 9 has a molded part 10 for a hinge that connects the container body and the lid, and on the opposite side a recessed part 11 for molded locking protrusions that lock them together.

The core plate 1 has a fitting groove 12 on the surface facing the cavity plate 4, and a slide block 13 is fitted into this fitting groove 12, and has a hole 15 into which an angular pin 14 is loosely inserted. Projections 17 on both sides of the lower end of the base 16 are fitted into guide grooves 18 at the bottom of the fitting groove 12, so that they can move without wobbling. The core side nest 3 of this slide block 13
A concave portion 11 opening toward the base portion 16 is formed in the side end portion 19 passing through, and the front surface of the base portion 16 facing the tip portion 19 forms an inclined surface 20.

The cavity plate 4 has a guide hole 21 that opens on the surface facing the core plate 1, and an adjustment block 22 is fitted into this guide hole 21.
0, and an adjustment screw 24 rotatably connected to the center of the upper surface, and this adjustment screw 24 is screwed into the cavity plate 4 and is connected to the head 2.
4a is exposed on the surface in contact with the runner stripper plate 6. Further, through holes 25 are provided on both sides of the adjustment block 22, and a fixing screw 26 passes through the through holes 25 and is screwed into a screw hole 27 of the cavity plate 4 from the guide hole 21.

Further, a spring 28 is applied to the base end surface of the slide block 13 to press the inclined surfaces 20 and 23 against each other.
An adjustment gap 29 is provided between the tip 19 of the core-side insert 3 and the core-side insert 3.

In this embodiment configured as described above, the slide block 13 includes a movable core plate 1,
It is movable in a direction perpendicular to the movement direction of the core 2 and the core-side nest 3, and the adjustment block 22 is slid by an adjustment screw 24 screwed into the cavity plate 4, which is the mold member on which it is installed. It is moved in a direction perpendicular to the direction of movement of block 13 and fixed in place.

Then, the cavity 9 is filled with the molten polymer material via the sprue 7, and when it solidifies, the movable mold is opened to obtain a container body or a lid body having a hinge portion and a locking protrusion. .

Here, with the mold open, that is, with the core plate 1, cavity plate 4, and runner stripper plate 6 spaced apart from each other, first loosen the fixing screw 26, then screw in the adjusting screw 24 to remove the adjusting block. 22 toward the core plate 1, the inclined surfaces 20, 23 of each other are
The slide block 13 that is in contact with the spring 28
The adjusting block 22 is moved in a direction to reduce the gap 29 against the above-mentioned pressure, and when it has moved by a predetermined amount, the fixing screw 26 is tightened to fix the adjusting block 22 in cooperation with the adjusting screw 24. This operation increases the distance between the recess 11 and the molded part 10 of the hinge on the opposite side, and therefore the recess 11 becomes relatively shallow, reducing the locking strength of the molded locking protrusion. Become.

Furthermore, by turning the adjustment screw 24 in the pulling direction and moving the adjustment block 22 in the direction away from the core plate 1, the slide block 13 is moved in the direction of enlarging the gap 29 by the force of the spring 28, and the slide block 13 is moved by a predetermined amount. By tightening the fixing screw 26 and fixing the adjusting block 22 when it is moved, the recess 11 becomes relatively deep, and therefore the locking strength by the molded locking protrusion increases.

FIG. 5 shows an example of a container molded by the mold of the present invention, in which a container body 32 and a lid body 33 are connected by a hinge 31 at one end, and a locking protrusion 34 is formed at the opposite end. , 35 is shown to open and close the cosmetic compact container. Either or both of the locking protrusions 34, 35 are formed by the recesses 11 whose relative depths are adjusted by moving the slide block 13.

Effects of the invention According to the invention, a slide block having a recess forming a locking protrusion and an adjustment block movable in a direction perpendicular to the direction of movement of the slide block are brought into contact with each other on an inclined surface by a spring force, and the adjustment screw Since the adjustment block is moved and fixed by the adjustment screw, the slide block can be moved minutely on the inclined surface by the simple operation of turning the adjustment screw, and the position of the recess can be changed. Since it is sufficient to provide a mold member such as a plate or a cavity plate with a relatively large groove or hole into which the slide block or adjustment block is fitted, processing can be easily carried out. In addition, since the adjustment screw is screwed into the mold member provided with the adjustment block and is arranged in the same direction as the moving direction of the movable mold, it can be operated from the outside when the mold is opened. Adjustments can be made without disassembling the mold, and the adjustment operation is simple.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of an embodiment of the present invention, Fig. 2 is an enlarged partial view of Fig. 1, Fig. 3 is a sectional view taken along line X-X in Fig. 1, and Fig. 4 is a main part of the Exploded perspective view, 5th
The figure is a longitudinal sectional view of an example of a container molded according to the present invention. 11... recess, 13... slide block, 2
0, 23... Inclined surface, 22... Adjustment block, 2
4...adjustment screw, 26...fixing screw, 28...spring, 29...gap.

Claims (1)

[Scope of utility model registration request] In a mold for molding a container made of a polymeric material, the container body and the lid are provided with a protrusion for interlocking them with each other, the recess for forming the interlocking protrusion is provided, and the moving direction of the movable mold is provided. a slide block that is movable in a direction perpendicular to the slide block; an adjustment block that contacts the slide block on an inclined surface and is movable in a direction perpendicular to the direction of movement of the slide block; A mold for molding a container, characterized in that it comprises a spring that presses against the block, and an adjusting screw screwed into a mold member provided with the adjusting block for moving and fixing the adjusting block in a predetermined position. .