JPH0229310A - Molding fixing device for infection molding machine - Google Patents

Abstract

PURPOSE:To mount various size molds, large and small, on a platen by actuating a lifting means to lift a mold, and lifting, lowering and moving respective upper and lower clampers interlocking with said lifting means. CONSTITUTION:Upper and lower clampers 25a-26b are retained on the lifting end and the lowering end preliminarily. Molds 11a and 11b are moved on supporting rollers 6, and the molds 11a and 11b are positioned in the left and right directions, molds 23a and 23b of lifting cylinders 21a and 21b are projected. The molds 11a and 11b are lifted from the supporting rollers 6 by said protruding action, and simultaneously interlocked with protruding action to move lower section clampers 26a and 26b following upward and move symmetrically the upper clampers 25a and 25b downward. Upper and lower edges 29a, 29a', 29b and 29b' of molds 12a and 12b are clamped, and small size molds 11a and 11b are mounted detachably on platens 1a and 1b.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a mold fixing device for an injection molding machine, and more specifically, it is used to detachably attach molds of various sizes to the platen of an injection molding machine. The present invention relates to a mold fixing device that can be used to hold a mold.

[Conventional technology]

For example, resin molded products such as bumpers attached to the body of an automobile or instrument panels disposed inside the vehicle are integrally molded using an injection molding machine. Figures 4 and 5 show a conventional mold fixing device for an injection molding machine used for injection molding of this type of large resin molded product. In the drawing, (ia) (lb) are A pair of movable platens and a fixed platen that make up an injection molding machine,
(2a) (2b) are each of the above platens (1a) (1b)
) is a mold that is removably attached and fixed to the mold (2a
) (2b) has mounting plates (4a) (4b) integrally provided at the rear ends of the main body (3a) (3b), and positioning recesses (5) on the lower end surfaces of the mounting plates (4a) (4b), respectively. It was formed. (6) is the platen (la
) (lb) opposite surface (la') (lb'
) are rotatably arranged in parallel at the bottom of the mold (2a).
(7) which supports (2b) so as to be movable in the horizontal direction is a positioning pin arranged in the center position in the left-right direction at the bottom of each of the platens (la) and (lb) in parallel with the support roller (6), This positioning pin (7) is attached to each mold (
The molds (2a) and (2b) are positioned in the left-right direction by being fitted and locked into the positioning recesses (5) of 2a and 2b in a bonded manner. (8) is each platen (la) above.
A plurality of hydraulic lower clampers (9) are arranged in parallel with support rollers (6) at the bottom of each platen (lb);
la) A plurality of hydraulic upper clampers are arranged on the upper part of (lb) to face the lower clamper (8), and the upper clamper (9) and the lower clamper (8)
2a) Clamp the upper and lower edges (10a) (10a') (10b) (10b') of the mounting plates (4a) and (4b) of (2b), respectively, and attach the molds (la and lb) to each platen (la) and (lb), respectively. 2a) Detachably attach and fix (2b).

Then, molds (
2a) When installing (2b), each mold (2
a) While holding (2b) upright, move each support roller (
6) Move the top so that each positioning pin (7) is aligned with each mold (2).
a) When each mold (2a) (2b) is positioned in the left-right direction by being fitted and locked into the positioning recess (5) in (2b), the upper and lower clampers (la) <lb
) are operated respectively, and the bottom edge of each mold (2a) (2b) is
10a) (10b) (10a') (10b') are clamped, and the mold (2a) is placed on the platen (1a) (1b).
(2b) is detachably attached and fixed.

By the way, the size of the bumper or instrument panel, which is an automobile part, differs depending on the car model, so
It is necessary to replace the mold depending on the car model. However, as shown in No. 6rgJ and FIG. 7, there is a small mold (11a) on each platen (la) (lb).
When trying to attach the mold (11b), the mold (11a
) (11b) and the platen (la) (lb) The center lines (a) and (b) of the platen (la) and (lb) are greatly misaligned in the vertical direction. (11b) cannot be attached to the mold (11a) (11(11b)), the mounting plate (13a) is attached to the rear end of the main body (12a)
(13b) is provided integrally, and the mounting plate (13a) (13b)
A positioning recess (14) is formed in the lower end surface of each of the two.

Therefore, conventionally, each of the above platens (la) (1-b)
When installing small-sized molds (11a) (11b), respectively, the molds (li a ) (11b
) on the rear end surface of the upper and lower clampers (8) and (9).
Attach a large auxiliary mounting plate that can be clamped with the clamper (8) (
9) by clamping each platen (la)
A small mold (lla) (11b) was removably attached and fixed to (lb).

(Problems to be Solved by the Invention) According to the conventional mold fixing device, each of the above platens (la)
(lb) small size mold (11a) <11
b) When installing the holder type (11a) (1
1b) A large-sized auxiliary mounting plate must be attached to the rear end surface of the auxiliary mounting plate, which requires a great deal of effort and time, resulting in extremely poor workability.

SUMMARY OF THE INVENTION An object of the present invention is to provide a mold fixing device that can attach molds of various sizes to a platen of an injection molding machine with a simple operation so as to allow film deposition.

[Means to solve the problem]

The present invention was proposed to achieve the above object, and
a platen that is held upright and on which a mold is removably attached; a platen that is rotatably attached to the bottom of the platen;
a plurality of support rollers that support the mold in a horizontally movable manner; a lifting means disposed at the lower end of the platen for raising and lowering the mold supported by the support rollers; and upper and lower portions of the platen. and a plurality of upper and lower clampers that are arranged to be movable up and down symmetrically in conjunction with the operation of the raising and lowering means, and that clamp the upper and lower parts of the mold, and the lower clamper is at the lower end position. At this time, it is held on substantially the same horizontal plane as the support roller.

[Effect]

When attaching a large mold to the platen, keep the lifting means inactive, hold the upper and lower clampers at the rising end and the falling end, respectively, and then move the support rollers while holding the mold upright. Then, the upper and lower clampers are operated to clamp the upper and lower edges of the mold, and the mold is attached and fixed to the platen so that it can be expanded.

When attaching a small mold to the platen, the mold is held upright on the support collage with the lower clamper held at the lower end, and then the elevating means is operated. The mold is lifted from the support roller by the operation of this elevating means, and at the same time, the lower clamper moves upward in contact with the mold in conjunction with the operation of this elevating means, and the upper clamper moves downward. ^・Move symmetrically. Then, at the same time that the upper clamper comes into contact with the upper edge of the mold, the center lines of the platen and the mold coincide, and in this state, the upper and lower clampers operate to clamp the upper and lower edges of the mold, A small mold is removably attached to the platen.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 and 2. Components that are the same as those shown in FIGS. 4 to 7 are denoted by the same reference numerals and their explanations are omitted. In drawings (21a) and (2Ib) are the molds (
2a) Lifting means for raising and lowering (2b), for example, a hydraulic lifting cylinder. The above lifting cylinder (
21a) (21b) is the platen (la)
(lb) is attached to the lower ends of the opposing surfaces (la') (fb') via brackets (22a) (22b),
In addition, it is disposed upright in front of the opposing surfaces (la') (lb'), and is located at the tip of the rod (23a) (23b). The supporting members <24a) (24b) are attached and fixed respectively - (25a) (25b) (26a)
(26b) is the upper edge (I) of each mold (2a) (2b).
Oa) (10b) and lower edge (10a') (10b
), each of which has a plurality of hydraulic upper and lower clampers (25a) to (26).
b) is the opposite surface (la) of the platen (la) (lb).
'>(lb') The rods (23) of the lifting cylinders (21a) (21b)
a) The lower clamper (26a) is installed in parallel so that it can be moved up and down symmetrically in conjunction with the protruding and retracting operation of (23b).
(26b) is disposed at a suitable position alongside the support roller (6) so that it is held on substantially the same horizontal plane as the support roller (6) when at the lower end position. Above upper clamper (25a
) (25b) and the lower clampers (26a) (26b) are
For example, as shown in FIG. 3, a T-shaped guide piece (27) is provided protruding from the rear end surface of each clamper (25a) to (26b).
27) on the opposite surface (l) of each platen (la) (lb)
1g formed respectively in a ' ) (lb ' )!
It is slidably fitted into the i-groove-shaped guide m (28), and both clampers (25a) to (26)
b), the upper and lower edges (10
a >(10a') (10b) (10b
' ) respectively and clamp each platen (la) (
The molds (2a) and (2b) are removably attached and fixed to the molds (2a) and (2b). In addition, the upper and lower clampers (25a) to (2
The vertical movement of 6b) is interlocked by an appropriate interlocking mechanism using, for example, a rank and a pinion.

Therefore, when installing large-sized molds (2a) (2b) on each of the above platens (la) (lb), the ey hood 2 of the lifting cylinders (21a) (21b)
3a) (23b), and remove the upper and lower clampers (25).
After holding the molds a) to (26b) at the rising end and the falling end, respectively, the molds (2a) and (2b) are moved on the support rollers (6) while being held upright. Then, each positioning pin (7) fits and locks into the positioning recess (5) of each mold (2a) (2b), and the engagement mold (2a) (2b)
) is positioned in the left and right direction, each of the upper and lower clampers (
25a) to (26b) respectively operate to release each mold (2a).
(2b) (7) Upper and lower edges (10a) (10a'
) (10b) (10b') are clamped, and the mold (2a) is placed on the planar 7 (ia) (lb).
) (2b) is removably attached and fixed.

Next, when attaching small-sized molds (11a) (llb) to the platens (la) (Lb),
The upper and lower clampers (25a) to (26b) are held at the ascending end and descending end in advance, and each of the molds (1
1a) (11b) are moved on the support roller (6) while being held upright, and each positioning bin (7) is aligned with the positioning recess (14) of each mold (Ha) (11b).
When the molds (11a) and (11b) are positioned in the left and right direction by being fitted into and locked with the cylinders (21a and 11b), respectively, the lifting cylinder (21a)
) (21b) The rods (23a) (23b) protrude. This falling cylinder (21a) (21b)
Due to the protruding action of the rods (23a) (23b), the molds (11a) (if b) are lifted from above the support roller (6), and at the same time the rods (23a) (23b) are lifted up from above the support roller (6).
3b), the lower clamper (26a)
(26b) is the lower edge (29) of the mold (la) (lb)
a') (29b') and moves upward while in contact with the upper clamper (25a) (25b').
) moves symmetrically downward. And the upper clamper (25
a ) (25b) is the mold (11a) (il
At the same time, the platen (la) <lb) and the mold (11a
) (11b The center lines (a) and (b) of i are aligned, and in this state, each of the upper and lower clampers (25a) to (26b
) operates and the upper and lower edges (2
9a) (29a') (29b) (29b
) is clamped and the platen (Ia) (lb)
A small mold (lla (11b)) is attached to the mold so that it can be freely expanded.

In the above embodiment, a case was explained in which a mold used for injection molding of large parts for automobiles is fixed, but the present invention is not limited to this, and can be used for injection molding of various large parts. It can be widely used for fixing molds.

〔Effect of the invention〕

According to the present invention, the lifting means is operated to lift the mold,
In conjunction with this, the upper and lower clampers move up and down symmetrically, making it possible to mount molds of various sizes on the platen, making it easy and quick to change molds. Work efficiency can be significantly improved.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view showing an embodiment of the device of the present invention, Fig. 2 is a schematic side view showing the operating procedure of the device of the present invention, and Fig. 3 is a plan cross-sectional view showing the mounting state of the upper and lower clampers. . Fig. 4 is a schematic side view of the conventional device, Fig. 5 is a schematic front view of the conventional device on the movable platen side, and Figs. 6 and 7 are for explaining problems when installing a small mold. FIG. (la) (1b) - platen, (2a) (2b) (lla) (llb)
-m-mold, (6) - Support roller (21a) (21b) - Lifting means, (2
5a ) (25b) -- Upper clamper, (26a
) (26b) - Lower clamper. Figure 4 Figure 5 De-・,, ', '+,,: L, J

Claims (1)

[Claims] (1) A platen that is held upright and on which a mold is removably mounted, and a platen that is rotatably mounted on the lower part of the platen;
and a plurality of support rollers that support the mold in a horizontally movable manner, a lifting means disposed at the lower end of the platen and for raising and lowering the mold supported by the support rollers, and an upper part of the platen. and a plurality of upper and lower clampers disposed at the lower part so as to be able to move up and down symmetrically in conjunction with the operation of the raising and lowering means, and clamping the upper and lower parts of the mold, the lower clamper having a lower end A mold fixing device for an injection molding machine, characterized in that it is held on substantially the same horizontal plane as a support roller when in position.