JPH0723229Y2 - Unit type injection mold - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a core. The present invention relates to a unit-type injection molding die for molding a synthetic resin or the like, which is configured as a cassette-type middle mold in which a pair of mold bodies including cavities is detachably attached to an outer frame mounted on an injection molding machine. .

[Conventional technology]

In the conventional unit type mold, in order to mount the middle mold to the outer frame, the core is first attached to the fitting portion of the outer frame in the fitted state. After inserting and dropping the middle mold with the cavity fitted, it is separated and temporarily fastened by the pressing piece, and the core. The middle mold has been positioned and fixed in the outer frame while the mating states of the cavities are adjusted.

[Problems to be solved by the invention]

The conventional unit-type mold has a medium-sized sink, core. It has been necessary to go through the unavoidable steps of separating the cavities and positioning and fixing by fitting the fitted state together, and it has not been possible to easily convert the medium size. Moreover, since the pressing piece provided with the elongated hole is fixed to the outer frame by being screwed, the stability is poor, and skill is required for positioning. SUMMARY OF THE INVENTION The present invention addresses the above-mentioned problems, and aims to provide a mold unit in which the positioning of the middle-sized mold is automatically performed and the conversion mounting of the middle-sized mold can be easily performed.

[Means for solving problems]

The present invention is a flange provided on a cassette-type middle mold that is fitted into a middle-size fitting portion, and a base end is pulled by a clamp bolt that is provided so as to project according to the thickness of the flange and is rotated from the outside of the outer frame, and a pressing end is provided. By rotating the and pressing the medium-sized flange, the medium-sized positioning and fixing to the outer frame can be done with one touch, and the medium-sized outer frame is still fitted, and the clamp bolt is squeezed from the outside of the outer frame to clamp the medium-sized model. It can be fixed.

[Action]

A medium-sized flange is inserted and guided in the gap between the pressing piece of the pressing mechanism provided on the inner wall of the fitting portion of the outer frame and the inner wall surface of the fitting portion. It can be slid and stored in the fitting part.

Further, since the clamp bolt is squeezed by the clamp bolt which is rotated from the outside of the outer frame to press and fix the flange provided in the middle mold, the clamping work can be completed with the middle mold and the outer frame being completely fitted.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes an outer frame mounted on an injection molding machine, which is composed of a core side 1a and a cavity side 1b, and is provided with medium-sized fitting portions 4a, 4b into which the core medium mold 2a and the cavity middle mold 2b are fitted, respectively. The cavity side outer frame 1b is provided with a nozzle touch A for receiving a material from an injection machine, and from there, through a sprue B, it is press-fitted into a molding die (not shown) formed by fitting 2a and 2b,
Molding is performed.

The core-side outer frame 1a has an ejecting mechanism 21 provided on the medium-sized mold 2a.
There is an accommodating portion 12 for accommodating the above, and both molds are guided by fitting the respective guide poles P and guide holes H.

The core middle mold 2a and the cavity middle mold 2b are provided with flanges 3a and 3b on their outer edges, respectively. First, the outer frame 1a,
The middle dies 2a and 2b fitted sideways are dropped into and fitted into the fitting portion 4 configured by fitting 1b.

A pressing mechanism 5 having a pressing end 53 protruding from the inner wall 11 of the outer frame against which the medium-sized flange abuts the medium-sized fitting portions 4a and 4b of the outer frames 1a and 1b at a position spaced by the thickness d of the medium-sized flanges 3a and 3b. The press end 53 and the inner wall 11 are provided so as to form a guide groove for the medium-sized flange, and the medium-sized flange is fixed after being dropped.

The pressing mechanism 5 includes a pressing piece 50 that rotates about a shaft support portion 51, a clamp bolt 54 that pulls a base end 52 thereof outward, and a pressing end 53.
And a spring 55 for pushing in the dissociation direction, and the plain is urged in the dissociation direction.

The clamp bolt 54 is screwed with the throttle nut 57 through the bare hole 56 penetrating the base end 52 of the pressing piece 50 from the outer wall of the outer frame 1a, 1b, and the throttle nut 57 is advanced by rotating the clamp bolt 54 from the outside. Or retreat to squeeze the proximal end 52 to press and fix the medium-sized flange or disengage it.

[Effect of device]

Since the present invention is configured as described above, the outer frames 1a and 1b are fitted to each other, the middle dies 2a and 2b are dropped into the fitting portion 3 in a fitted state, and the clamp bolt is inserted from the screw hole opened to the outer wall of the outer frame. The middle mold 2a is pressed and fixed to the outer frame 1a simply by turning 54, and the position of the middle mold 2b is automatically determined by the position holding by fitting, so it is composed of the inner wall of the fitting part and the protruding end of the pressing piece. Together with the guide of the medium-sized flange, it is possible to convert the medium-sized one in an extremely short time without requiring any skill.

Therefore, it is possible to perform several types of molding in a single time by utilizing one injection molding machine.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a partially cutaway side view of the entire mold unit with the middle mold fixed to the outer frame and the mold opened, and FIG. 2 shows the middle mold on the outer frame. FIG. 3 is a partially cutaway side view in the case of being fitted without being fitted, and FIG. 3 is a partially cutaway plan view of the cavity side outer frame. 1a …… core side outer frame, 1b …… cavity side outer frame, 11 …… outer frame inner wall, 12 …… ejection mechanism housing part, 2a …… core side middle mold, 2b …… cavity side middle mold, 21 …… ejection mechanism ,
3a, 3b ... Medium flange, 4a, 4b ... Medium fitting part, 5 ...
… Pressing mechanism, 50 …… Pressing piece, 51 …… Shaft support, 52 …… Base end, 53 …… Pressing end, 54 …… Clamp bolt, 55 …… Spring, 56 …… Bare hole, 57 …… Throttle nut , A ... Nozzle touch, B ... Spool, P ... Guide pole, H ...
Guide hall

Claims (1)

[Scope of utility model registration request] 1. A pair of middle dies, each of which has a flange on each of its outer edges and is fitted to a cavity surface and a core surface, and a fitting portion for removably fitting the middle dies by fitting. At the same time, the pressing piece that protrudes according to the thickness of the flange provided in the middle size inside the fitting part, and the pressing end rotates in the flange pressing direction, and the base end of the pressing piece by the operation from the outside of the outer frame. A unit type injection molding die including a pair of outer frames having a pressing mechanism composed of a clamp bolt that pulls in the rotation direction inside the outer frame fitting portion.