JPH0452019Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a structure for exchanging inserts for forming display parts such as product color numbers and brand marks in molding molds. be.

[Conventional technology]

Normally, when displaying a color number, brand mark, etc. on a product molded by a molding die, there are cases where the product is molded with the display projected onto the mold itself, and when the display is displayed on the molded product. In some cases, the product is molded by attaching a sticker attached thereto, or by fixing the insert with a display projected oppositely onto the mold using screws or the like.

[Problem that the invention attempts to solve]

However, when molding products with markings attached to the mold itself, the mold itself must be changed every time there is a change in color number, etc., resulting in large-scale replacement work and a decrease in work efficiency. At the same time, it was necessary to prepare special molds for each type of display.

In addition, when pasting a sticker with a display on a molded product, there are disadvantages such as variations in the position of the sticker and peeling of the sticker. However, there were drawbacks such as easy dirt adhesion.

On the other hand, when molding a product by fixing an insert with a marking attached to the mold using screws or the like, it is possible to respond to changes in the marking simply by replacing the insert. However, there was a drawback that traces of screws and the like for fixing the insert to the mold were formed on the product, reducing the product value.

[Means for solving problems]

The present invention improves and eliminates the above-mentioned conventional problems, and allows the display to be formed so that no traces of the insert fixing means remain on the product, and the insert can be replaced extremely easily. The aim is to provide a structure that allows for

Therefore, the means adopted by the present invention to solve the above-mentioned problems is to form a concave portion tapered in a direction perpendicular to the molding surface at a position of the mold corresponding to the display area of the product, and to Fit and install the insert with the brand mark etc. projected oppositely, bias it in the ejecting direction with a spring, and insert it from the side of the mold into the position intersecting the tapered surface of the tapered recess. a notch that can be flush with the tapered surface of the tapered recess, and a groove with a semicircular cross section that can fit into the shaft is formed on the side surface of the insert. ing.

[Effect]

When the insert is fitted into the tapered recess of the mold, the display surface of the insert is flush with the molding surface. When changing the display, when the shaft inserted from the side of the mold is rotated, its notch becomes flush with the tapered surface of the tapered recess into which the insert is fitted, and the insert is biased by the spring. and protrudes from the molding surface. Therefore, the insert can be replaced very easily.

〔Example〕

The configuration of the present invention will be explained below based on the embodiments shown in the drawings.

1 to 4 show one embodiment of the present invention. FIG. 1 is a partially sectional front view showing the entire molding die 1, FIG. 2 is a partially sectional side view of the same, and FIG.
1 is a partially enlarged sectional view showing the fitted state of the insert 2, and FIG. 4 is a partially enlarged sectional perspective view showing the insert 2 in the middle of being replaced. As shown in the figure, the molding die 1 has a fixed upper die 3 and a lower die 4 which can be raised and lowered, and a cavity 5 and a core 6 are attached in a fitted state to the mating surfaces of the upper and lower dies 3 and 4. The cavity 5 and the core 6 form a molding space 7 for the product. In this embodiment, the lower die 4 which is a movable die is
A tapered recess 9 is continuously formed in the core 6 in a direction perpendicular to the molding surface 8 of the core 6. The insert 2 has the same shape as the tapered recess 9, and its surface 2a is formed with an indication 10 (see Fig. 4) in the form of a color number, brand mark, etc., projected against it. A support member 12 is attached to the lower end surface 2b of the insert 2, which abuts against the bottom surface 11 of the tapered recess 9. Between the recess bottom surface 11 and the insert lower end surface 2b,
A spring 13 is attached to bias the insert 2 so as to pop out from the molding surface 8.

Further, a shaft attachment hole 14 is bored at a position intersecting the tapered surface 9a of the tapered recess 9 and the insert side surface 2c, passing through the core 6 and the lower mold 4 and reaching the side surface of the lower mold 4. A shaft 15 for mounting and holding the insert 2 is inserted through the mounting hole 14 . On the other hand, a groove 16 having a semicircular cross section that can be engaged with the shaft 15 is bored in the insert side surface 2c. Further, a notch 17 that can be flush with the tapered surface 9a of the tapered recess 9 is formed in a portion of the shaft 15 facing the tapered recess 9.

As shown in FIGS. 1 to 3, the insert 2 is fitted into the tapered recess 9 and is attached to the side surface 2c.
The groove 16 engages with the shaft 15 to prevent it from coming off. Further, in the installed state, the insert surface 2a forms the same plane as the molding surface 8 of the core 6, and the support member 12 is in contact with the bottom surface 11 of the recess. Then, as shown in FIGS. 1 and 2, the product 18 is used in this state and molded into a product 18 by injection molding or the like. The molded product 18 has a nesting surface 2a
It is natural that the display 10 is engraved or protruded in the opposite direction, and it is possible to read the color number, brand mark, etc. in the normal state (as is).

When replacing the insert 2 when molding products 18 of the same shape with different colors, use a tool such as a hex wrench from the side of the lower mold 4 to insert the shaft 15.
A notch 17 formed on the tip side of the
is made flush with the tapered surface 9a of the tapered recess 9, as shown in FIG. As a result, nest 2
The lock is released and the spring 13 pops out above the molding surface 8 due to the biasing force of the spring 13. After that, this insert 2 is taken out, and the insert 2 with a different indication is fitted into the tapered recess 9, and the shaft 15 is inserted as shown in FIGS. 1 to 3. The solid portion may be engaged with the groove 16 to prevent it from coming off.

In this way, in this embodiment, the insert 2 can be replaced simply by rotating the shaft 15, which is extremely simple.

By the way, the present invention is not limited to the embodiments described above, and can be modified as appropriate. For example, for nest 2, a plurality of nests are arranged in a straight line, and 1
A single shaft 15 may be used to prevent these items from falling out. In this case, if the angle of each notch 17 formed in the shaft 15 is changed, each insert 2 can be replaced by changing the rotation angle of the shaft 15. Moreover, the molding die 1 of interest may be not only injection molding but also other general press molding machines. Furthermore, the insert 2 may be exchanged between one with a display such as a brand mark and one with no display. Furthermore, the support member 12 can also be omitted.

[Effect of idea]

As explained above, in the present invention, the insert can be replaced simply by rotating the shaft inserted from the side of the mold, and the insert replacement work is extremely easy. Furthermore, since there is no need for screws or the like to attach the insert itself to the mold, no traces of the screws or the like are formed on the product, making it possible to manufacture high-quality products. Furthermore, compared to the case where a brand mark or other display is attached to the mold itself, it is not only easier to change the setup, but also the initial cost can be lowered. In addition, compared to displaying by pasting a sticker on the product after it has been molded, there is no risk of misalignment, so uniform display is possible, and there is less dirt on the display area. There are advantages such as

[Brief explanation of the drawing]

The drawings are all related to one embodiment of the present invention, and FIG. 1 is a partially sectional front view showing the entire molding die, FIG. 2 is a partially sectional side view of the same, and FIG. FIG. 4 is an enlarged partial cross-sectional view showing the mating state, and FIG. 4 is an enlarged partial cross-sectional perspective view showing the insert being replaced. 1... Molding die, 2... Insert, 3... Upper mold, 4
... lower mold, 5 ... cavity, 6 ... core, 9 ...
...Tapered recess, 9a...Tapered surface, 10...
...Display, 13...Spring, 15...Shaft, 16...Groove, 17...Notch.

Claims (1)

[Scope of utility model registration request] A tapered recess in a direction perpendicular to the molding surface is formed at the position of the mold corresponding to the display area of the product, and a brand mark, etc. is projected onto the recess and an insert is fitted into the mold. The shaft is inserted from the side of the mold at a position where it intersects the tapered surface of the tapered recess, and the shaft intersects with the tapered surface of the tapered recess. 1. A insert exchange structure for a molding die, characterized in that a notch is formed that can become the same, and a groove having a semicircular cross section that can fit into the shaft is formed on a side surface of the insert.