JP7348158B2 - injection mold - Google Patents

Description

The present invention relates to an injection mold having a sliding structure.

In a resin molding mold having a sliding structure, resin is poured into the mold under high pressure during injection molding, so it is required to have a butt strength that can withstand the resin pressure. If the abutment strength of the slide core is weak, molding defects such as resin burrs will occur when resin molding is performed using a mold. As a countermeasure, it is common to disassemble the mold and check for burrs while polishing the bottom of the locking block or attaching a shim plate to the bottom to adjust the abutment strength.

Patent Document 1 states, ``A movable body comprising a fixed body on the fixed side of a mold, an angular pin and a locking block fixed to the fixed body, and a fitting groove on the movable side of the mold. The angular pin has a through hole into which the angular pin is inserted, and a slide core is fitted into the fitting groove, and when the mold is clamped, the angular pin is inserted into the through hole of the slide core and the locking block locks the angular pin into the through hole. In an injection mold in which the slide core is brought into pressure contact with the movable body to define a cavity into which molten resin is injected by the stationary body, the slide core, and the movable body, the slope of the locking block that abuts the slide core is A locking block structure for an injection mold, characterized in that a second block is fixed with thin plates sandwiched between them, and the amount of pressure contact of the slide core against the moving body is adjusted depending on the number of thin plates sandwiched.'' (Utility Model) (Scope of Registration Claims)

Utility Model Publication No. 2-65523

When it is necessary to adjust the abutment strength of the slide core, the adjustment is generally made by disassembling the mold and polishing the bottom surface of the locking block, or by attaching a shim plate to the bottom surface. However, with this method, it is necessary to disassemble the heavy mold and adjust the locking block each time adjustment is required, which requires a large amount of work time. Furthermore, even when making adjustments during mold molding, it is necessary to remove the mold body from the injection molding machine and disassemble the mold.

In the injection mold described in Patent Document 1, the second block is fixed by sandwiching a thin plate between the inclined surfaces of the locking block that abuts the slide core, and the amount of pressure contact of the slide core against the movable main body is adjusted by the number of thin plates to be sandwiched. Therefore, it is necessary to remove the second block to adjust the amount of pressure contact.

An object of the present invention is to provide an injection molding die in which the abutment strength of a slide core can be easily adjusted, and the abutment strength can be adjusted even during mold injection molding. With the goal.

In order to solve the above problems, the injection molding die of the present invention includes an abutment adjustment block provided in the locking block, and adjusts the abutment strength of the slide core by adjusting the position of the abutment adjustment block.

An example of the "injection mold" of the present invention is:
An injection mold for injection molding resin, which is composed of a fixed side mold and a movable side mold, and the movable side mold slides according to the movement of the movable side mold to form a molding part. The stationary mold has a first inclined surface in contact with the slide core of the movable mold, and a second inclined surface opposite to the first inclined surface, and the fixed mold is movable. a rocking block; a locking abutment adjustment block that includes an inclined surface in contact with a second inclined surface of the rocking block and whose position can be adjusted in a direction intersecting the moving direction of the rocking block; and the rocking abutment adjustment block an adjustment bolt for adjusting the position of the locking abutment adjustment block, and is configured to adjust the abutment amount of the slide core of the movable side mold by adjusting the position of the locking abutment adjustment block with the adjustment bolt. It is something.

According to the present invention, the locking block is provided with an abutment adjustment block, and by adjusting the position, it is possible to adjust the amount of protrusion of the slide core, so that it is possible to perform injection molding without disassembling the mold. Even if there is, it is possible to easily adjust the abutment strength.

Problems, configurations, and effects other than those described above will be made clear by the description of the embodiments below.

FIG. 2 is a cross-sectional view of the mold structure in an open state according to an embodiment of the present invention. FIG. 2 is a sectional view of the mold structure in a clamped state according to an embodiment of the present invention. FIG. 3 is a plan view of the movable side of the mold body viewed from above. FIG. 3 is a diagram showing a wedge-structured slide abutment adjustment mechanism according to an embodiment of the present invention. It is an enlarged view of the abutment amount adjustment bolt. It is a figure explaining abutment adjustment of a slide core by a slide abutment adjustment mechanism.

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a sectional view of a mold structure in an open state according to an embodiment of the present invention. Further, FIG. 2 shows a cross-sectional view of the mold structure in a clamped state according to an embodiment of the present invention.

The injection mold includes a fixed side 100 and a movable side 200 that moves relative to the fixed side. As a component of the mold body fixed side 100, a locate ring 13, which is a component for positioning the mold, is attached to a fixed side mounting plate 1 connected to the fixed side of the injection molding apparatus. In addition, a sprue bushing 12 is provided in combination with the stationary side template 2, which is a component that guides the molten resin injected from the injection nozzle of the injection molding device to the molding part 8 in the mold. The fixed side mold plate 2 includes a locking block 5 that pushes out the slide block 4 assembled on the movable side of the mold body during mold clamping, a locking abutment adjustment block 6 that pushes out the locking block 5, and a rocking abutment adjustment block. An abutment strength adjusting bolt 7 for adjusting the amount of extrusion of the mold 6, and an angular pin 14 for moving the slide block 4 to the outside of the mold when the mold is opened are attached.

The components of the mold main body movable side 200 include a movable side mounting plate 9 connected to the movable side of the injection molding device, an ejector plate A10 and an ejector plate B11, a movable side mold plate 3, and an ejector pin 16 that protrudes the molding part 8. Consisted of. The movable side template 3 is provided with a slide block 4 that slides as the movable side moves.

FIG. 3 shows a plan view of the mold body movable side 200 viewed from above. FIG. 3 is a diagram corresponding to FIG. 1 in the mold open state, with the slide block 4 opening to both sides. In the figure, reference numeral 15 is an angular pin insertion hole through which the angular pin 14 is inserted.

An outline of the operation of the mold shown in FIGS. 1 to 3 will be explained.
In the mold opening state of FIG. 1, when the movable side 200 is moved upward toward the fixed side 100, the two slide cores 4 are guided by the angular pins 14 and slide toward the center. Then, the sloped surface of the locking block 5 and the sloped surface of the slide core 4 come into contact, and the slide core 4 is pressed toward the center by the sloped surface of the locking block 5, and the two slide cores 4 abut against each other to form a molded part 8. do.
In the mold-clamped state shown in FIG. 2, molten resin is introduced from the sprue bushing 12 into the molding part 8 in the mold and solidified.
After the molten resin has solidified, the movable side 200 is moved downward in a direction away from the fixed side 100. The slide core 4 opens to both sides while being guided by the angular pin 14. Then, the resin molded product on the movable side 200 is pushed out by the ejector pin 16 and taken out.

FIG. 4 shows a slide abutment adjustment mechanism using a wedge structure of the locking block, which is a feature of the present invention.

As shown in FIG. 4, the slide abutment adjustment mechanism has a structure in which a locking block 5 and a locking abutment adjustment block 6 are combined with a fixed side template 2. The locking block 5 is provided with a first inclined surface on the slide core 4 side, and also provided with a second inclined surface on the opposite side of the locking abutment adjustment block 6. The locking abutment adjustment block 6 has a wedge structure including an inclined surface that contacts the second inclined surface of the locking block 5. The locking abutment adjustment block 6 is attached with an abutment strength adjustment bolt 7 so that its position can be adjusted in the vertical direction in the figure. FIG. 5 shows an example of the butt strength adjusting bolt 7. The adjustment bolt 7 has a hexagonal hole in its head into which a hexagonal wrench is inserted, and a groove that accommodates a + or - driver.

When adjusting the abutment strength of the slide core 4, by rotating the abutment strength adjustment bolt 7, the locking abutment adjustment block 6 is moved in the vertical direction in the figure, and the locking abutment adjustment block 6 and locking The locking block 5 is moved in the horizontal direction in the figure according to the inclination angle set for the block 5. Then, the amount of abutment of the slide block 4 in the mold clamped state is adjusted.

FIG. 6 illustrates the abutment adjustment of the slide core by the slide abutment adjustment mechanism.
The upper side of FIG. 6 shows a state in which the abutment strength adjustment bolt 7 is loosened and the locking abutment adjustment block 6 is moved downward. As shown by the arrow, when the locking abutment adjustment block 6 is moved downward, the locking block 5 is moved to the left, and the abutment strength of the slide core 4 in the mold clamped state is weakened.

On the other hand, the lower side of FIG. 6 shows a state in which the abutment strength adjustment bolt 7 is tightened and the locking abutment adjustment block 6 is moved upward. As shown by the arrow, when the locking abutment adjustment block 6 is moved upward, the locking block 5 is moved to the right, and the abutment strength of the slide core 4 in the mold clamping state is increased.

The abutment strength adjustment bolt 7 may be adjusted by rotating it with, for example, a hexagonal wrench in the mold open state.

In this way, by rotating the abutment strength adjustment bolt 7 and adjusting the position of the wedge-structured locking abutment adjustment block 6, the abutment strength of the slide core 4 can be adjusted. According to the above, by providing a locking block with an abutment adjustment block and adjusting the position, it is possible to adjust the protrusion amount of the slide core, without disassembling the mold, even during mold injection molding. The abutment strength can be easily adjusted.

1...Fixed side mounting plate 2...Fixed side template 3...Movable side template 4...Slide block 5...Rocking block 6...Rocking abutment adjustment block 7...Abutting strength adjustment bolt 8...Forming part 9...Movable side Mounting plate 10...Ejector plate A
11...Ejector plate B
12... Sprue bushing 13... Locate ring 14... Angular pin 15... Angular pin insertion hole 16... Ejector pin

Claims (4)

An injection mold for injection molding resin, consisting of a fixed side mold and a movable side mold,
The movable mold includes a slide core that slides to form a molding part according to movement of the movable mold,
The fixed side mold is
a movable rocking block comprising a first inclined surface in contact with the slide core of the movable mold and a second inclined surface opposite to the first inclined surface;
a locking abutment adjustment block having an inclined surface in contact with a second inclined surface of the locking block and whose position can be adjusted in a direction intersecting the moving direction of the locking block;
an adjustment bolt for adjusting the position of the locking abutment adjustment block;
Equipped with
An injection mold configured to adjust the amount of abutment of the slide core of the movable side mold by adjusting the position of the locking abutment adjustment block using the adjustment bolt . The injection mold according to claim 1 ,
The injection mold is characterized in that the adjustment bolt has a hexagonal hole in the head into which a hexagonal wrench is inserted. The injection mold according to claim 1,
The moving direction of the locking block is perpendicular to the moving direction of the movable mold,
An injection molding mold characterized in that a moving direction of the locking abutment adjustment block is parallel to a moving direction of the movable mold. The injection mold according to claim 1,
An injection mold, wherein the locking abutment adjustment block has a wedge shape.

Images