JPH0312444Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention particularly relates to a die-casting mold using an insert fitting.

Conventionally, when attaching insert metal fittings to a mold,
Since the insert fitting is simply attached to the insert mounting portion, the insert fitting tends to move in the axial direction during casting, often resulting in defective products.

Therefore, to prevent the insert fitting from moving inadvertently in the axial direction with respect to the insert fitting mounting part,
Proposals have been made to make the dimensional accuracy of the insert metal fitting and the mounting part stricter, or to protrude a pin that holds the insert metal fitting on the opposing mold side, but in the former case, the cost is high and the insert metal fitting is difficult to install. In the latter case, the shape of the pin that holds the insert metal fitting remains as a hole in the product, which impairs the product's appearance and weakens its strength, and the hole may have to be filled in by post-processing. .

In view of these conventional inconveniences, the present invention provides a locking pin that presses toward the inner circumferential surface of the insert fitting on the circumferential side of the insert mounting portion of the mold so that it can freely come out and retract. An engagement groove is provided on the inner circumferential surface of the insert fitting, and when the insert fitting is inserted into the insert fitting attachment part, the locking pin is elastically engaged with the engagement groove. Another object of the present invention is to provide an insert fitting holding structure for holding an insert fitting in an axially immovable manner.

An example of implementing the present invention will be described below based on the drawings.

In the figure, reference numeral 1 denotes a mold, and an insert fitting mounting portion 2 is formed protrudingly at a required location.

The insert fitting mounting part 2 is for mounting and supporting the insert fitting 3. A locking pin 4 for holding the insert fitting 3 on the circumferential side of the insert fitting fitting part 2 is attached to the inner peripheral surface of the metal fitting 3. It is installed so that it can appear and appear freely by pressing in the direction.

The latching pins 4 are screwed into one or more locations on the circumferential side of the insert fitting mounting portion 2, three locations in the circumferential direction in the drawing, and are housed in an installation tube 5 that is inserted into the spring 6.
The insert fitting 3 is installed so as to be able to protrude and retract freely by being pressed in the direction of the inner circumferential surface of the insert fitting 3, and the tip portion 4a is pressed against the inner circumferential surface of the insert fitting 3.
is held from its inner peripheral surface side.

An engagement groove 7 is provided on the inner circumferential surface of the metal insert 3 with which the tip end 4a of the latching pin 4 is elastically abutted, into which the tip end 4a is elastically protruded and engaged.

The engagement groove 7 is provided with grooves in the circumferential direction of the inner circumferential surface of the insert fitting 3 over the locking pins 4 installed at three locations, and the insert fitting 3 is inserted into the insert fitting mounting portion 2.
When inserted into the
are elastically protruded so as to engage with the engagement groove 7 at the same time.

Thus, the insert fitting 3 is moved by the elastic force of the latching pin 4 from the inner circumferential surface side and the engagement force of the distal end 4a of the latching pin 4 with the engagement groove 7 provided on the inner circumferential surface.
It is latched and held on the insert fitting mounting part 2 so as not to be able to move in the axial direction.

Since the insert fitting holding structure of the present invention is constructed as described above, it exhibits the following effects.

When the insert fitting is inserted into the insert fitting mounting part of the mold, the insert fitting firmly and firmly attaches to the shaft due to the elastic engagement of the tip of the latch pin provided on the circumferential side of the fitting part with the engagement groove. It is held down so that it cannot move in any direction.

Therefore, according to the insert fitting holding structure of the present invention, the tip of the latching pin is fixed to prevent the insert fitting from moving inadvertently in the axial direction during a mounting operation such as inserting the insert fitting into the insert fitting mounting portion. It can be firmly held by elastic engagement with the engagement groove of the part.

Furthermore, the axial installation position of the insert fitting relative to the insert fitting attachment part can be confirmed by the elastic engagement of the tip of the locking pin with the engagement groove, and the insert fitting can always be inserted and installed in the same state. Therefore, the stability of the casting position of the insert fitting into the product can be achieved, and quality improvement and reliability can be expected due to the stability of the casting position of the insert fitting without variation.

Furthermore, since the insert fitting is held in the insert fitting mounting portion from its inner circumferential surface side, there is no possibility that it will leave a mark on the product or otherwise have an adverse effect.

Thus, the intended purpose can be achieved.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an example of the implementation of the present invention;
The figure is a sectional view taken along line 2-2. In the figure, 1 is the mold, 2 is the insert fitting mounting part,
3 is an insert fitting, 4 is a locking pin, 6 is a spring, and 7 is an engagement groove.

Claims (1)

[Scope of utility model registration request] A locking pin that presses toward the inner circumferential surface of the insert is provided on the circumferential side of the insert mounting portion of the mold so that it can freely protrude and retract, and an engagement groove is formed in which the tip of the locking pin protrudes elastically and engages. An insert fitting holding structure for a die-casting mold, characterized in that the insert fitting is provided on the inner peripheral surface of the insert fitting.