JP4295393B2 - Fixed positioning mechanism for mold nesting - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mold structure in an injection mold and an adjustment method thereof.
[0002]
[Prior art]
FIG. 3 is a cross-sectional view of a mold structure depending on the processing accuracy of a mother mold and a nest in a conventional injection mold. As shown in FIG. 3, the fixing to the conventional mother die 1 and the insert 2 is fixed with a bolt 10 or the like perpendicular to the mold dividing surface 7.
[0003]
[Problems to be solved by the invention]
Positional accuracy securing of the matrix 1 and the insert 2, it is necessary to process the matrix inside dimension 11 and nested Dimensions 12 at an intermediate fit more accuracy. If the position accuracy of the mother mold 1 and the insert 2 is unstable, the dimension of the molded product obtained thereby is not stable. Moreover, since the insert 1 and the mother die 2 are more than an intermediate fit, it takes time to disassemble and assemble.
[0004]
[Means for Solving the Problems]
The present invention relates to a mold positioning fixed positioning mechanism of an injection molding die, a mother die having through screw holes parallel to the die dividing surface on four surfaces perpendicular to the die dividing surface, a nest having a concave shape consisting of only R-shape at a position opposed to the through screw hole a direction parallel to the mold split surface, the tip is formed more a screw that is a R configuration, the screw Is inserted into the through screw hole and pressed into the concave shape to position and fix the mother die and the insert at the same time.
Moreover, it is comprised from the screw which has the conical shape at the front-end | tip.
Furthermore, in the adjustment method of the mold nesting fixed positioning mechanism using the mold nesting fixed positioning mechanism, the position accuracy of the nesting is corrected from the outside of the mold base of the mold.
According to the present invention, even if the clearance between the nesting and the mother die is increased, the clearance is pressed in one direction at the time of assembly, so that the positional accuracy can be ensured. In addition, the nesting accuracy can be corrected from the outside of the mold, and the positioning of the nesting is performed in a state where the movable mold and the stationary mold are combined.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described below with reference to the drawings of the embodiments.
FIG. 1 is a sectional view of a mold structure for fixing and positioning a mother mold and a nest according to an embodiment of the present invention. The present invention includes a mother die 1 having a through screw hole 4 parallel to the mold dividing surface 7, a nest 2 having an R-shaped concave shape 5, and a screw 3 having an R-shaped tip 6. As another embodiment, the use of a ball plunger or the like instead of the screw 3 and the use of a conical shape instead of the R shapes 5 and 6 can be mentioned.
[0006]
According to such a configuration, the insert 2 inserted into the mother die 1 in FIG. 1 (a) is pressed in one direction by the screw 3 in FIG. 1 (b), and the positional accuracy of the mother die 1 and the insert 2 is ensured. The Further, at this time, the mother mold 1 and the insert 2 are completely fixed by the R convex 6 and the R concave 5.
[0007]
FIG. 2 is a cross-sectional view perpendicular to FIG. 1, and is a cross-sectional view of a mold structure that ensures nesting position accuracy from the outside of the mold when the movable mold and the fixed mold are combined. In this structure, as shown in FIG. 2, the screw 3 can be operated from the outside of the mold, so that the position of the insert 2 can be corrected and fixed even when the movable mold 8 and the fixed mold 9 are combined. For this reason, if the structure which positions with the screw 3 from 4 directions is taken, it can position in the state which inserted the nest | insert 2 in the mother mold | die and united the movable mold | type 8 and the fixed mold | type 9. FIG. This makes it possible to ensure the nesting position accuracy independent of the accuracy and state of the master mold.
[0008]
By adopting a mold structure in which the mother mold and the insert are fixedly positioned according to the present invention, parts formed by injection of a printer or the like can be made from a large structure to a small structure.
[0009]
【The invention's effect】
According to the present invention, since the nest can be fixed and positioned from the outside of the mother die, high-precision positioning can be performed without depending on the processing accuracy of the mother die and the nested. In addition, mold assembly is facilitated.
[Brief description of the drawings]
FIG. 1 is a sectional view of a mold structure for fixing and positioning a mother mold and a nest according to an embodiment of the present invention.
FIG. 2 is a vertical sectional view of a mold structure for fixing and positioning a mother mold and a nest according to an embodiment of the present invention.
FIG. 3 is a cross-sectional view of a mold structure depending on the processing accuracy of a conventional mother mold and nesting.
[Explanation of symbols]
1: mother die, 2: nesting, 3: screw, 4: through screw hole, 5: recessed shape, 6: convex shape, 7: mold dividing surface, 8: fixed mother die, 9: movable mother die, 10: Mounting bolts, 11: dimensions inside the mold, 12: dimensions outside the insert.

Claims (3)

In the fixed positioning mechanism of the mold insert of the injection mold, there are four molds perpendicular to the mold dividing surface, a mother mold having through screw holes parallel to the mold dividing surface, and a mold dividing surface. a nest having a concave shape consisting of only R-shape, the tip is configured more a screw that is a R-shape at a position opposed to the through screw hole a direction parallel for,
A mold nesting fixed positioning mechanism that inserts the screw into the through screw hole and presses it into the concave shape to position and fix the mother mold and the nesting simultaneously.   2. The fixed positioning mechanism for a mold insert according to claim 1, wherein the fixed tip positioning mechanism is constituted by a screw having a conical tip.   3. A mold nesting fixed positioning mechanism using the mold nesting fixed positioning mechanism according to claim 1 or 2, wherein the nesting position accuracy is corrected from the outside of the mold base. Adjustment method of fixed positioning mechanism.

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