JPH0452020Y2 - - 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 attached to a molded product, there are disadvantages such as variations in the position of the sticker and peeling of the sticker.Furthermore, the adhesive material on the seal part 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 provide a recess in a direction perpendicular to the molding surface and an insert that is continuous with the recess at the position of the mold corresponding to the display area of the product. A insert with a brand mark or the like projected onto the surface thereof is fitted into the recess, and an extrusion member that removably supports the insert is inserted into the insertion hole. The extrusion member is urged in the ejecting direction by a spring in the insertion hole, and a shaft inserted from the side of the mold is arranged at a position intersecting the extrusion member of the insertion hole, and the shaft is inserted into the insertion hole. A cutout that can be flush with the inner surface of the insertion hole is formed, and a groove with a semicircular cross section that can fit into the shaft is formed on the side surface of the extrusion member.

[Effect]

When the insert and the extrusion member that removably supports the insert are fitted into the recess and insertion hole 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 inner surface of the insertion hole into which the extrusion member is inserted, and the insert applies the biasing force of the spring to the extrusion member. It is received through the molding surface and pops out from the molding surface. After that, all you have to do is remove the insert by unscrewing it from the extrusion member, and screw the insert with a new indication onto the extrusion member.
The insert can be replaced extremely easily.

〔Example〕

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

1 to 5 relate to one embodiment of the present invention, in which 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.
The figure is an enlarged partial sectional view showing the fitted state of the insert 2 and the extrusion member 3, FIG. 4 is an enlarged partial sectional view showing the insert 2 in the process of being replaced, and FIG. FIG. As shown in the figure, molding die 1
has a fixed upper mold 4 and a lower mold 5 that can be raised and lowered, and a cavity 6 and a core 7 are attached to the upper and lower molds 4 and the mating surfaces in a fitted state. The cavity 6 and the core 7 form a molding space 9 for the product 8.

In this embodiment, the core 7 has a molding surface 1 of the core 7.
Recess 1 with an inverted trapezoidal cross section in the direction perpendicular to 0
1 is bored, and insertion holes 12 and 13 are bored continuously from the recess 11 to reach a part of the lower mold 5. Nest 2, as best represented in Figure 5,
having the same shape as the recess 11 having an inverted trapezoidal cross section;
A display 14 is formed on the surface 2a, with a color number, a brand mark, etc. projected in opposite directions. Further, this insert 2 is screwed onto the upper end portion of the extrusion member 3. The extrusion member 3 has a flange 15 fitted into the insertion hole 13 at its intermediate portion, and the flange 15 is rotated in the ejecting direction (Figs. 1 to 4) by a spring 16 in the insertion hole 13. (in the upper direction in the figure).

Further, a shaft attachment hole 17 is bored at a position where the hole inner surface 12a of the insertion hole 12 and the side peripheral surface 3a of the extrusion member 3 intersect, passing through the core 7 and the lower mold 5 and reaching the side surface of the lower mold 5. A shaft 18 for restraining the vertical movement of the extrusion member 3 is inserted through the attachment hole 17. On the other hand, extrusion member 3
A groove 20 having a semicircular cross section that can be engaged with the shaft 18 is bored in the side circumferential surface 3a of the shaft 18. Further, a notch 19 is formed in a portion of the shaft 18 facing the insertion hole 12, which can be flush with the inner surface 12a of the insertion hole 12.

As shown in FIGS. 1 to 3, the insert 2 and the push-out member 3 are fitted into the recess 11 and the insertion holes 12, 13, and the groove 20 of the push-out member 3 engages with the shaft 18. , it is prevented from coming off. In addition, in the installed state, the insert surface 2a is the core 6
It forms the same plane as the molding surface 8, and its bottom surface 2b is in contact with the recess bottom surface 11a. Then, as shown in FIGS. 1 and 2, it is used in this state,
The product 8 is molded by injection molding or the like. It is a matter of course that the display 14 on the inserting surface 2a is engraved or protruded on the molded product 8 in a state in which it is projected oppositely.
It is possible to read color numbers, brand marks, etc. in their normal state (as they are).

When replacing the insert 2 when molding products 8 of the same shape with different colors, rotate the shaft 18 from the side of the lower mold 4 using a tool such as a hex wrench, The cutout 19 that was
As shown in FIG. 4, the hole inner surface 12a of the insertion hole 12
and be flush with each other. As a result, the locking of the extrusion member 3 is released, the extrusion member 3 and the tip insert 2 are urged upward by the urging force of the spring 16, and the insert 2 is projected above the molding surface 10. After that, the insert 2 is removed from the upper end of the extrusion member 3, the insert 2 with a different marking is screwed onto the upper end of the extrusion member 2, and the entire assembly is pushed down to form the insert 2 shown in FIG. As shown in FIG. 3, the solid part of the shaft 18 is
It is sufficient to engage the groove 20 in the groove 20 to prevent it from coming off.

As described above, in this embodiment, the insert 2 can be replaced simply by rotating the shaft 18 and attaching and detaching it to the extrusion member 3, 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, a plurality of pairs of the insert 2 and the extrusion member 3 may be arranged in a straight line, and a single shaft 18 may be used to prevent these from falling out. In this case, if the angle of each notch 19 formed in the shaft 18 is changed, each insert 2 can be replaced by changing the rotation angle of the shaft 18. Moreover, the molding die 1 to be used may be not only injection molding but also other general press molding machines. Further, the insert 2 may be exchanged between one with a display such as a brand mark and one with no display. Furthermore, the method of attaching the insert 2 to the extrusion member 3 may be a screw-fitting method or other connection method.

[Effect of idea]

As explained above, in the present invention, the shaft inserted from the side of the mold is rotated to cause the insert to protrude from the molding surface via the extrusion member, and in this state, the insert is attached to and removed from the extrusion member. The insert can be replaced by simply doing the following, and the work of replacing the insert 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. Also, compared to displaying by pasting a sticker on the product after it has been molded,
Since there is no risk of misalignment, uniform display is possible, and there are advantages such as less dirt on the display section.

[Brief explanation of the drawing]

The drawings are all related to one embodiment of the present invention, and FIG. 1 is a partial sectional front view showing the entire molding die, FIG. 2 is a partial sectional side view of the same, and FIG. An enlarged partial cross-sectional view showing the fitted state of the members;
Figure 4 is an enlarged partial cross-sectional view showing the insert being replaced.
FIG. 5 is a perspective view showing the entire insert and extrusion member. 1... Molding die, 2... Insert, 3... Extrusion member, 4... Upper die, 5... Lower die, 6... Cavity, 7... Core, 10... Molding surface, 11... Recess, 12, 13...Insertion hole, 14...Display, 16
... Spring, 18 ... Shaft, 19 ... Notch, 20 ... Groove.

Claims (1)

[Scope of utility model registration request] A recess in a direction perpendicular to the molding surface and an insertion hole continuous to the recess are bored at the position of the mold corresponding to the display area of the product, and a brand mark, etc. is placed on the surface with a facing projection. At the same time, a push-out member that removably supports the insert is fitted into the insertion hole, and the push-out member is urged in the ejecting direction by a spring in the insertion hole. death,
A shaft inserted from the side of the mold is arranged at a position intersecting with the extrusion member of the insertion hole, a notch that can be flush with the inner surface of the insertion hole is formed in the shaft, and a notch is formed in the shaft so as to be flush with the inner surface of the insertion hole. A insert replacement structure using an extruded member, characterized in that a groove having a semicircular cross section that can fit into the shaft is formed.