JPS61280911A - Metal mold for molding with long inserting body - Google Patents

Abstract

PURPOSE:To carry out efficiently inserting operation without damaging inserting bodies, by constituting the metal mold sleeves in a bottom force to freely slide. CONSTITUTION:Metal mold sleeves 10, which freely slide up- and downward, are equipped in a bottom force 3 and the upper end surface 10a of the metal mold sleeve 10 forms one of the wall of a shape engraving space 8 and has a hole 11 for inserting an inserting body. The movable metal mold sleeves 10 are connected with a sleeve plate 12 which is movable up-and downward in an open space 3a of the bottom force 3. Ascending/descending cylinders 13 are connected with the plate 12, which can ascends and descends in a body with the cylinders. The upper end surface 10a of the metal mold sleeve 10 is brought to about the same level as the upper surface of the bottom force 3 by elevating the metal old sleeve 10 and the lower end part of the inserting body 6 is inserted into the inserting hole 11 of the metal mold sleeve 10. The upper force 1 is then set to close the mold and the upper end part of the inserting body 6 is thereby inserted in the inserting hole 2. The metal mold sleeve is thereafter lowered and the specified form engraving space 8 is formed above the upper end surface 10a.

Description

[Detailed Description of the Invention] [Technical Field] This invention relates to a mold device for an injection molding machine for a synthetic resin material, and in particular to a mold device for molding a molded product having a long insert. It is related to.

<Prior art> Conventionally, mold devices for molding long inserts include:
There are various types of molds in which a mold sleeve with an insert insertion hole is inserted into the lower mold, and an overview thereof is shown in FIG.

In the figure, an insert insertion hole 2 is formed in the upper mold 1, while a mold sleeve 4 is inserted and fixed in the lower mold 3. The mold sleeve 4 has an insert insertion hole 5 formed from its upper end surface 4a. The inserts 6 are inserted into the insert insertion holes 2.5 of both molds 1.3, and the molds are closed and clamped. Reference numeral 7 denotes a support bin, which determines the amount of insertion of the insert 6 into the insert insertion hole 5; 8 is a die engraving space, of which the upper end surface 4a of the die sleeve 4 constitutes one wall surface; are doing.

In the above conventional technology, when inserting the insert 6, the lower end is inserted into the insert insertion hole 5 formed in the mold sleeve 4 of the lower mold 3, and then when the mold is closed, The upper end of the insert 6 is inserted into the insert insertion hole 2 of the upper mold l.

By the way, when inserting the insert, the lower end of the insert 6 must be inserted into the insert insertion hole 5 of the lower mold 3 through the die-scabbing space 8, so it is difficult to guide it, and insertion errors often occur. There was a drawback that the insert 6 could be damaged if raised.

Furthermore, when the insert 6 is inserted into the insert insertion hole 5 of the lower mold 3, the upper end of the insert 6 tends to tilt, resulting in poor alignment with the insert insertion hole 2 of the upper mold 1. There was also a drawback that the insert 6 was pressed and bent.

Purpose of the present invention In view of the problems such as the inefficiency of the insert insertion work due to the structural limitations of the mold device for molding long inserts based on the above-mentioned conventional technology, it is an object of the present invention to By making the mold sleeve slidable, the above-mentioned drawbacks can be eliminated and an excellent mold device can be provided which can perform extremely efficient insertion work of inserts without damaging the inserts. be.

The present invention, which achieves the above object, provides a mold sleeve that is inserted into a lower mold, has an insert insertion hole formed from its upper end surface, and whose upper end surface forms one wall surface of the mold-carving space. By sliding and rotating in the axial direction of the insert insertion hole within the lower mold, when inserting the insert, the mold sleeve is raised and its upper end is flush with the upper surface of the lower mold. hand,
Insert the lower end of the insert into the insert insertion hole of the lower mold through the die-scabbing space, close the upper mold in this state, and insert the upper end of the insert into the insert insertion hole of the upper mold. The gist is that the mold sleeve is inserted, and then the mold sleeve is lowered to form a mold engraving space above it.

<Example> Next, an example of the present invention will be described below based on the drawings from FIG. 2 onwards.

In FIG. 2, a mold sleeve 10 is installed inside the lower mold 3 so as to be vertically slidable within the lower mold 3, and the upper end surface 10a of the mold sleeve 10 is one wall surface of the mold carving space 8. At the same time, an insert insertion hole 1 is formed from the upper end surface 10a.
1 is drilled. The movable mold sleeve 10 is connected to a sleeve plate 12 that is movable up and down within a space 3a in the lower mold 3, and an elevating cylinder 13 is attached to the plate 12, and its piston rod 14
is connected to the lower mold 3. Therefore, lifting cylinder 1
When hydraulic oil is supplied to the piston rod 3, since the piston rod 14 is fixed, the cylinder body moves up and down, and the sleeve plate 12, which is integrated with the cylinder body, moves up and down.

Note that the other structural conditions are the same as the constituent elements indicated by the same reference numerals in FIG.

The operation of the above configuration will be explained as follows based on FIG. 3.

Prior to insert insertion, the mold sleeve 10 is raised from the state shown in FIG. 2, and its upper end surface tOC is aligned with the upper surface 3b of the lower mold 3 and the road surface, as shown in FIG. −. In this state, the lower end of the insert 6 is inserted into the insert insertion hole 11 of the mold sleeve 0 using a suitable insert insertion head 15. At this time, the insertion amount of the insert 6 is determined by the support pin 7. In this state, the distance from the upper end surface LQ& of the mold sleeve 10 to the support pin 7 is determined by the insert amount of the mold sleeve 10. The depth dimension of the engraving space 8 is added to the insertion amount of the insert object 6 inserted into the object insertion hole 11.

Next, as shown in FIG. 3(B), the upper mold 1 is closed and the upper end of the insert 6 is inserted into the insert insertion hole 2.

Thereafter, the sleeve plate 12 is lowered by driving the lifting cylinder 13 shown in FIG. 2, and as shown in FIG.
A predetermined die-carving space 8 is formed above 0a.

Note that at this time, since the support pin 7 does not move, the mold sleeve IO slides inside the lower mold 3.

It also slides against the insert 6.

By the way, the driving means for the mold sleeve 10 is not limited to the embodiment shown in FIG. 2, but may also utilize an ejector rod as shown in FIG. The mold sleeve 10 is connected to a sleeve plate 12, and an ejector rod 17 abuts on the sleeve plate 12 from below. And, on the outer periphery of the mold sleeve 10, there is a sleeve play)! 2 and lower mold 3
A return spring 18 is interposed between the mold sleeves! O
The army is always moving downward, that is, in the retreating direction.

The insert insertion operation in the above configuration is basically the same as that shown in FIG. 2 above. Here, the upward movement of the mold sleeve 10 is carried out by the raising of the sleeve plate 12 by the ejector rod 17, and the retreat of the mold sleeve after inserting the insert is achieved by the return movement when the ejector rod 7 is pulled down. Effects achieved by the downward urging force of the spring 18 on the sleeve plate 12> As described above, according to the present invention, the mold sleeve having the insert insertion hole is inserted into the lower mold, In a mold device for forming a long insert in which the upper end surface of the mold sleeve serves as one wall surface forming a mold-carving space, the mold sleeve is slidable in the axial direction of the insert insertion hole within the lower mold. Therefore, when inserting an insert, the mold sleeve is raised and its upper end surface is made approximately flush with the upper surface of the lower mold, so that the insert can be inserted into the insert insertion hole of the mold sleeve. When inserting into a mold, the insertion work can be done directly at a close distance without going through the die-cutting space.
This operation is simple and has the advantageous effect that damage to the insert due to insertion errors does not occur.

Furthermore, even when the upper mold is closed after inserting the insert into the lower mold, the mold sleeve remains in the raised position, so the amount of protrusion of the insert from the upper end surface of the mold sleeve is limited to the amount of the mold carving space. The insert can be made smaller by the depth dimension, the upper end of the insert will not be tilted, the insert can be smoothly inserted into the insert insertion hole of the upper mold, and damage such as bending the insert will not occur.

In addition, the upward movement of the mold sleeve also has the effect of ejecting the molded product from the mold engraving space.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a conventional example, Fig. 2 and the following show embodiments of the present invention, Fig. 2 is a side sectional view, Fig. 3 (A) (B)
(C) is a work explanatory diagram, and FIG. 4 is a sectional view of another embodiment. 1... Upper die 2... Insert insertion hole 3...
...Lower die 6...Insert object 7...Support pin 8...Die engraving space lO... ...Mold sleeve 11...Insert insertion hole I2...
... Sleeve plate Fig. 1 Fig. 2 - tf > ψ -

Claims (1)

[Claims] A long insert insertion hole 11 is formed from the upper end surface 10a inserted into the lower mold 3, and the upper end surface 10a
In a mold device including a mold sleeve 10 which forms one wall surface of a mold engraving space 8, the mold sleeve 10 forms a wall surface of a lower mold 3.
A mold device characterized in that it is slidable in the axial direction of an insert insertion hole 11 within the mold device.