JPH0584752A - Mold for plastic - Google Patents

Abstract

PURPOSE:To provide the title mold constituted so that the parts of the code, symbol, character or the like provided to a mold are made freely alterable and the other parts are made common. CONSTITUTION:A recessed part 13 and a screw hole 14 are formed to the surface of the core 2 of a mold and a code, a symbol, a character or the like for indication plastic material quality are provided to the periphery of the recessed part 13 and a display part 15 is attached to the recessed part 13 and the screw hole 14 in a freely detachable manner. An arrow is formed to the surface of the display member 15 and the direction of the arrow is made possible to change over by rotating the display member 15 so as to be aligned with the disired part among the code, the symbol, the character or the like.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a plastic molding die.

[0002]

2. Description of the Related Art Conventionally, when a casing member such as an adapter or a battery charger is molded by plastic using a plurality of kinds of materials having the same shape, the materials are identified as follows.

[0003] For example, when it is not possible to distinguish by changing the color depending on the material at the time of molding, or when the color cannot be changed,
A symbol for indicating the material is formed on the mold, and the symbol is molded on the plastic molded product for identification.

[0004]

However, in the case of forming a material indicating symbol or the like on the mold, since it is formed integrally with the core or cavity on the inner surface of the mold, the symbol or the like for indicating the material of the molded product is required. There is a problem that the cost increases because it requires multiple molds that differ only in the part.

Therefore, the present invention solves the above-mentioned conventional problems and provides a plastic molding die in which portions such as symbols, symbols and characters provided in the die can be freely changed and other portions are made common. The purpose is to provide.

[0006]

In order to achieve the above-mentioned object, the present invention has a code, symbol, character or the like for indicating a plastic material, which is changeable provided on the inner surface.

[0007]

With the plastic molding die configured as described above, the signs, symbols, characters, etc. for indicating the material can be easily displayed on the molded product, and even if the same shape and color are used, The type can be identified.

At this time, the symbols, symbols, characters and the like provided on the mold can be changed by switching or exchanging them, and the other parts can be made common.

[0009]

The present invention will be described in detail below with reference to the drawings showing the embodiments.

FIG. 1 shows an example of a plastic molding die according to the present invention. The mold in the figure is for injection molding. It heats and melts the plastic of the specified material, and the spool bush 3
More injection is performed to fill the gap between the cavity 1 and the core 2 and to cool and solidify to form a molded product 4 having a desired shape.

The cavity 1 and the core 2 are stamped into a predetermined shape by machining or the like. The cavity 1 is fixed to the fixed-side mold plate 5, and the mold plate 5 is attached to the fixed-side mounting plate 6.

The core 2 is fixed to the movable side mold plate 7,
The template 7 is attached to a receiving plate 8. Further, the receiving plate 8 is attached to the movable side attaching plate 10 via the spacer 9.

The fixed side mounting plate 6 and the movable side mounting plate 10
Are detachably attached to a molding machine (not shown),
While the fixed-side mounting plate 6 remains fixed, the movable-side mounting plate 10 moves in the direction of the arrow X by the molding machine, and the fixed-side template 5 (that is, the cavity 1) and the movable-side template 7 (that is, the core 2) are moved. ) Is designed to open and close.

Reference numeral 11 denotes an ejecting pin, which is moved in the direction of the arrow Y when the mold is opened so that the ejecting pin 11, 11 fixed to the plate 12, 12 is ejected from the surface of the core 2. The molded product 4 is extruded, and the molded product 4 is released as shown in phantom lines and taken out.

On the inner surface (cavity 1 side or core 2 side) of the mold, however, symbols, symbols, characters and the like for indicating the plastic material are provided so that they can be changed, and a molded product 4 is illustrated in FIG. The bottom surface or the inner surface of the casing member used for the adapter, the battery charger or the like is preferable, but the other surface may be the bottom surface or the inner surface of the casing, and the symbols, symbols, characters, etc. However, even the molded products 4 having the same shape and the same color can identify the type of the plastic material used.

A specific first embodiment of integrally molding the symbols, symbols, characters, etc. on the bottom surface of the molded product 4 in this manner will be described with reference to FIGS. 1 and 3.

In this case, a circular recess 13 is formed on the surface of the core 2 and a screw hole 14 is formed in the center of the recess 13. Further, around the opening surface of the concave portion 13 (that is, the surface of the core 2), reference numerals and symbols corresponding to the plastic materials,
Letters and the like (alphabets A, B, C, D corresponding to the plastic material in the illustrated example) are inverted and engraved.

The display member 15 having one end bulged
Is detachably attached to the recess 13 and the screw hole 14. The display member 15 has a disc portion 16 that fits into the recess 13 and a male screw portion 17 that is screwed into the screw hole 14, and the display member 15 is rotatable with respect to the core 2. Is becoming

Further, an arrow is formed on the surface of the disc portion 16, and the direction of the arrow can be switched by rotating the display member 15 according to the desired alphabet.

Therefore, when the molded product 4 is molded by aligning the direction of the arrow with the alphabet corresponding to the plastic material used for molding, the alphabet and the arrow are formed on the bottom surface of the molded product 4, as shown in FIG. Can be integrally molded, and by looking at the alphabet (A in the example in the drawing) in the direction of the arrow, even in the molded product 4 having the same shape and the same color, the type of plastic material used can be identified.

By doing so, the molds can be shared, and one plastic mold can display various plastic materials.
Costs can be reduced because a plurality of dies for displaying the material of the molded product are not required.

Instead of the first embodiment, a plurality of display members 15 ... Is prepared and prepared in a line, and a different alphabet (not an arrow) is formed on the surface of the disc portion 16 of each display member 15. It is also desirable to selectively use one of the above-mentioned ones according to the plastic material used for molding (not shown).

Next, in the second embodiment, as shown in FIG. 4, a replaceable display member 18 is attached to the tip of the protruding pin 11.

The display member 18 has a disk portion 19 having an outer diameter dimension equal to the outer diameter dimension of the protrusion pin 11, and a male screw portion 20 screwed into a screw hole 21 formed in the protrusion pin 11. .. As shown in FIG. 5, a plurality of display members 18 ... Are arranged and aligned, and on the surface of the disc portion 19 of each display member 18,
The symbols, symbols, characters, etc., which correspond to the respective plastic materials (the alphabets A, B, C, D corresponding to the plastic materials in the illustrated example) are reversed and die-stamped.

Then, as shown in FIG. 4, the above-mentioned alphabetic display member 18 corresponding to the plastic material used for molding is screwed onto the protrusion pin 11 and molded to obtain a molded product 4 (see FIG. 1). On the bottom, a code for displaying the material,
Symbols, characters, etc. can be integrally molded, and even if they are the same color and have the same shape, the type of plastic material used can be identified.

Further, one die and a plurality of display members 18 ...
With, it is possible to display various plastic materials, so that common molds can be achieved.

Next, in the third embodiment, as shown in FIG. 6, a plurality of square holes 22 are provided on the surface of the core 2 and a plurality of plug members 23 that can be fitted into the square holes 22 are provided. It is a thing.

Specifically, on the bottom surface of each square hole 22, a code, symbol, character, etc. corresponding to the plastic material (in the illustrated example, the alphabet A corresponding to the plastic material,
(B, C, D) are inverted and stamped to form a plug member.
23 is detachable from the square hole 22.

Then, leaving the square hole 22 in which the alphabet (A in the illustrated example) corresponding to the plastic material used for molding is formed, the plug member 23 is attached to each of the other square holes 22. For example, on the bottom surface of the molded product 4 (see Fig. 1), signs, symbols, letters, etc. for indicating the material can be integrally molded, and even if they are the same color and have the same shape, the type of plastic material used can be identified. Become.

Further, since various plastic materials can be displayed on one die and a plurality of plug members 23, the dies can be shared.

Next, in the fourth embodiment, as shown in FIG. 7, a square hole 22 is provided on the surface of the core 2 and a plurality of display members 24 ... Which can be fitted into the square hole 22 are provided. On the surface of each display member 24, a code, a symbol, a character, or the like corresponding to the plastic material is reversely formed, and the display member 24 is detachably attached to the square hole 22 like a virtual line.

Then, if the display member 24 is replaced and molded in accordance with the plastic material used for molding, a code, symbol, character or the like for indicating the material is provided on the bottom surface of the molded product 4 (see FIG. 1). They can be integrally molded, and even if they are the same color and have the same shape, the type of plastic material used can be identified.

Further, one die and a plurality of display members 24 ...
With, it is possible to display various plastic materials, so that common molds can be achieved.

The present invention is not limited to the above-mentioned embodiments, and design changes can be freely made without departing from the gist of the present invention.

For example, the mold shown in the figure is for injection molding, but the present invention can be applied to various molds such as blow molding. In addition, although the materials are shown in alphabets in each embodiment, other symbols, symbols, characters, etc. may be used. In addition to displaying the plastic material, it can also be used for manufacturing type, code, and the like.

Further, the symbols, symbols, characters, etc. for indicating the material are integrally molded on the bottom surface of the molded product 4 in FIGS. 3, 6 and 7, but the inner peripheral surface, the back surface or the outer peripheral surface is formed. It is also possible to integrally mold it to the outer peripheral surface of the core 2 (in the case of the inner peripheral surface of the molded product), the surface of the cavity 1 (the back surface of the molded product) in the embodiment of FIGS. 3, 6 and 7. In the case of) and the inner peripheral surface of the cavity 1 (in the case of the outer peripheral surface of the molded product).

[0037]

Since the present invention is constructed as described above, it has the following great effects.

Codes, symbols, characters, etc. for indicating the material are integrally molded on the molded product 4, and even if they have the same shape and the same color, the kind of the plastic material used can be identified.

At this time, the parts such as symbols, symbols and characters provided on the mold can be changed by switching or exchanging them, and other parts can be made common.

Therefore, using only one die,
Since various plastic materials can be displayed on the molded product 4,
Costs can be reduced without the need for a plurality of molds as in the past.

[Brief description of drawings]

FIG. 1 is a front sectional view showing an embodiment of the present invention.

FIG. 2 is a perspective view of a molded product.

FIG. 3 is a perspective view showing a first embodiment.

FIG. 4 is a sectional view of an essential part showing a second embodiment.

FIG. 5 is a perspective view of a display member according to a second embodiment.

FIG. 6 is a perspective view showing a third embodiment.

FIG. 7 is a perspective view showing a fourth embodiment.

[Explanation of symbols] 1 cavity 2 core 4 molded product 11 protruding pin

Claims (1)

[Claims] 1. A plastic molding die characterized in that a code, a symbol, a character or the like for indicating a plastic material is provided on an inner surface so as to be changeable.