JP2001001376A - Fixing location positioning mechanism for mold insert - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately position by constituting a fixing location positioning mechanism of a matrix having a threaded through hole substantially parallel to a split surface of a mold, an insert having a recess shape, and a screw having a round shape at its end, and simultaneously positioning and fixing the mold and the insert. SOLUTION: The fixing location positioning mechanism comprises a matrix 1 having a threaded through hole 4 parallel to a split surface 7 of a mold, an insert 2 having a rounded recess shape 5 and a screw 3 having a round shape 6 at its end. Instead of the screw 3, a ball plunger or the like is used. Instead of the shapes 5, 6, a conical shape can be used. Thus, the insert 2 inserted into the matrix 1 is urged in one direction by the screw 3, thereby assuring a positioning accuracy of the matrix 1 and the insert 2. Further, then the matrix 1 and the insert 2 are completely fixed by the recesses 6, 5. Accordingly, a component formed by injecting such as a printer or the like can be manufactured from a large structure to a small structure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold structure for an injection mold and a method for adjusting the same.

[0002]

2. Description of the Related Art FIG. 3 is a cross-sectional view of a mold structure in a conventional injection mold which depends on the machining accuracy of a matrix and a nest.

[0003] As shown in FIG. 3, the conventional fixing to the mother die 1 and the nest 2 is performed by bolts 10 or the like perpendicular to the mold dividing surface 7. In addition, ensuring the positional accuracy of the matrix 1 and the nest 2
It is necessary to process the mother mold inner dimension 11 and the nest outer dimension 12 with an accuracy higher than that of the intermediate fit. If the positional accuracy of the matrix 1 and the insert 2 is unstable, the resulting molded product dimensions will not be stable. Also, since the nest 1 and the matrix 2 are more than the intermediate fit, it takes time to disassemble and assemble.

[0004]

According to the present invention, even if the clearance between the nest 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. Also, the accuracy of the nesting position 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 fixed mold are combined.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings of the embodiments. FIG. 1 is a cross-sectional view of a mold structure for fixing and positioning a matrix and a nest according to an embodiment of the present invention. The present invention relates to a mother die having a through screw hole 4 parallel to a mold dividing surface 7.
1, a nest 2 having an R-shaped concave shape 5, and a screw 3 having an R-shaped tip 6. As another embodiment, use of a ball plunger or the like instead of the screw 3 or use of a conical shape instead of the R-shaped 5 or 6 may be mentioned.

According to such a configuration, FIG.
1 is pressed in one direction by a screw 3 in FIG. 1 (b), and the positional accuracy of the matrix 1 and the nest 2 is secured. Further, at this time, the matrix 1 and the nest 2 are completely fixed by the R convex 6 and the R concave 5.

FIG. 2 is a cross-sectional view perpendicular to FIG. 1, and is a cross-sectional view of a mold structure for securing the nesting position accuracy from outside the mold when the movable mold and the fixed mold are combined. As shown in FIG. 2, the screw 3 can be operated from the outside of the mold, so that the position of the nest 2 can be corrected and fixed even when the movable mold 8 and the fixed mold 9 are combined. Therefore, 4
If the structure in which the positioning is performed by the screw 3 from the side is adopted, the positioning can be performed in a state where the nest 2 is inserted into the mother die and the movable die 8 and the fixed die 9 are aligned. This makes it possible to ensure the nesting position accuracy independent of the accuracy and state of the master block.

[0008] By adopting the mold structure of the present invention in which the mother die and the nest are fixedly positioned, parts formed by injection of a printer or the like can be manufactured from a large structure to a small structure.

[0009]

According to the present invention, since the nest can be fixed and positioned from the outside of the matrix, high-precision positioning can be performed without depending on the machining accuracy of the matrix and nest. Also, the mold assembly becomes easy.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a mold structure according to one embodiment of the present invention for fixing and positioning a matrix and a nest.

FIG. 2 is a vertical sectional view of a mold structure for fixing and positioning a matrix and a nest according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view of a conventional mold structure that depends on machining accuracy of a mother die and a nest.

[Explanation of symbols]

1: Matrix, 2: Nesting, 3: Screw, 4: Penetrating screw hole, 5: Concave shape, 6: Convex shape, 7: Mold dividing surface, 8:
Fixed matrix, 9: movable matrix, 10: mounting bolt, 1
1: dimensions inside the matrix, 12: dimensions outside the nest.

Claims (3)

[Claims] In an injection molding die, a mother die having a through screw hole substantially parallel to a mold division surface, a nest having a concave shape substantially parallel to the die division surface, and a tip end. A fixed positioning mechanism for the mold nest that is composed of an R-shaped screw and simultaneously positions and fixes the matrix and nest. 2. The fixed positioning mechanism for a mold nest according to claim 1, wherein the tip is constituted by a screw having a conical shape. 3. A method for adjusting a mold nest fixed positioning mechanism according to claim 1, wherein the positioning accuracy of the nest is corrected from outside the mold.