JPS5919552Y2 - Mold - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mold such as a die-casting mold, and more particularly to a mold in which a cavity-forming insert is removably fixed.

Conventionally, in die casting molding, when molding a wide variety of products in small quantities, it is economically burdensome to make a mold for each product.

For this reason, die casting molds are used in which only the cavity portion can be replaced.

This conventional die casting mold was constructed as shown in FIGS. 1 and 2.

That is, 1 is a movable mold body.

Reference numeral 2 denotes a recess for inserting a nest formed in the mold body 1, and a cavity 3 is formed in the recess 2 for inserting a nest 4.
5 is the mold body 1 which is press-fitted in a replaceable manner.
Molten metal is forced into the cavity 3 from the flow divider 5 through the runner 6.

Reference numeral 7 denotes a plurality of stopper pins, four in this embodiment, provided on the mold body 1, and these stopper pins 7 are fixedly installed on the pusher plate 8.

Reference numeral 9 denotes a guide bush provided on the mold body 1.

Reference numeral 10 denotes an extrusion pin whose one end is attached to the extrusion plate 8 and whose other end is inserted into the extrusion pin insertion holes 1a and 4a formed in the mold body 1 and the insert 4, respectively.

11 is an alignment mark. Reference numeral 12 denotes a mold body fixed to a fixed part, and this mold body 12 has a cavity insert 1.
3 is removably press-fitted into the cavity 3, a sleeve 15 for guiding the molten metal into the cavity 3, a guide pin 16 to be inserted into the guide bush 9, and an alignment mark 17. ing.

In the above configuration, the alignment marks 11 and 17 of the mold bodies 1 and 12 are aligned to perform mold alignment.

After that, the sleeve 15 is attached to a casting machine (not shown).
The product is cast by pouring molten metal into the cavity 3 from the passage through the runner 6.

In addition, when casting a different product, the inserts 4 and 13 press-fitted into the recesses 2 and 14 of the mold body 1. Unless the dimensional accuracy of the insertion recess is made highly accurate, there is a drawback that positional deviation is likely to occur because the mold bodies 1 and 12 are positioned.

In view of the above-mentioned conventional drawbacks, the present invention allows the insert to be easily attached to and removed from the mold body, allows the insert to be positioned reliably and easily, and is larger than the conventional recess for inserting the insert. The purpose is to obtain a mold into which the insert can be inserted.

Hereinafter, the present invention will be explained in detail with reference to an embodiment shown in FIGS. 3 to 6.

In the description of this embodiment, parts that are considered to have the same or equivalent configuration as the embodiments shown in FIGS. 1 and 2 are designated by the same reference numerals, and redundant explanation will be omitted.

In the embodiments shown in FIGS. 3 to 6, the main difference from the embodiments shown in FIGS. 1 and 2 is that the mold body 1A has a stepped portion 1B.
and a penetrating square-shaped recess 2A for insert insertion, and a fifth recess 2A for insert insertion that is formed to protrude outward from a position other than the corner of this recess 2A for insert insertion.
A recess 2B into which a large insert 4B as shown in FIG. 6 and FIG. 6 can be inserted is formed.
Inserts 4A and 4B smaller than the recesses 2A and 2B into the recesses 2A and 2B, respectively, are inserted into the recesses A and 2B, and the inserts are inserted into the recesses 2A and 2B as shown in FIGS. 3 and 6. Pull to one corner and insert 4A.

After fixing the positions with bolts 20 as positioning members for positioning 4B, 4A, and 4B, the inserts 4A and 4B can be fixed to the mold body 1A with a plurality of set bolts 21, and then the extrusion pins are fixed. The IOA is attached to the pusher plate 22, and the pusher plate 22 is attached to the pusher plate 8 with bolts 23, and the insert insertion recess 14A of the mold body 12A, and the insert insertion recess 14A. The insert insertion recess 1 is formed to protrude outward from a position excluding the corner.
4A, into which a large insert 13B as shown in FIGS. After inserting the inserts 13A and 13B respectively, pulling the inserts 13A and 13B to one corner, and fixing the inserts 13A and 13B in position with bolts 24 as positioning members, insert the inserts 13A and 13B with a plurality of set bolts 25. Mold body 12A
With this configuration, the inserts 13A and 13B can be easily processed and aligned accurately and reliably.

Furthermore, when replacing the insert with a cavity-formed insert that uses a different number of ejector pins or a different diameter of ejector pins, the mold body 1A does not need to be specially processed.

20.24 is the mold body I A, 12 A
It can move inside the elongated hole 27.26 formed in the insert 4A.
, 4B, 13A, and 13B.

Note that the insert and the insert insertion hole may have a polygonal shape other than a rectangular shape.

Also, a recess 2A for inserting the insert in the mold body 1A. Even if 2B is constructed in the same manner as the insert inserting recess 14A formed in the mold body 12A, there are advantages in that the insert can be easily attached and removed, and the insert can be easily positioned.

In addition to die casting, it can also be used for casting molds for resin materials and other molten metals.

As is clear from the above explanation, in the present invention, the insert is positioned by pulling it with bolts to the predetermined corner wall of the recess for inserting the insert, so unlike the conventional method, the insert is Even if the dimensional accuracy of the entire insertion recess is not made high, the dimensional accuracy can be made high by making only a predetermined portion highly accurate, which makes processing easy and extremely easy to attach and remove.

In addition, a recess into which a larger insert can be inserted than the recess for inserting the insert is formed in the mold body at a position other than the corner of the recess for inserting the insert. When casting a large product, it is possible to cast a large product by using an insert that fits into the recess.

This greatly expands the casting range and has excellent practical advantages of being economical.

[Brief explanation of the drawing]

Figure 1 is a developed view of a conventional mold, Figure 2 is II of Figure 1.
3 is a developed view showing one embodiment of the present invention, 4 is a sectional view taken along line 1-1 in 3, and 5 is a sectional view taken with the insert removed. FIG. 6 is an explanatory diagram showing a state in which large inserts 4B and 13B are inserted. 1.1A...mold body, 2.2A, 2B...recess,
3.3A... Cavity, 4.4A, 4B... Insert, 5... Shunt, 6... Runway, 7... Stopper pin, 8... Extrusion plate, 9...・Guide bush, 1
0... Push-out pin, 11... Alignment mark, 12
, 12A...Mold body, 13, 13A, 13B...
・Cavity insert, 14. 14A, 14B... recess, 15... sleeve, 16... guide pin, 17
... Alignment mark, 20... Bolt as a positioning member, 21... Set bolt, 22... Extrusion plate, 24... Bolt.

Claims (1)

[Claims for Utility Model Registration] 1. A mold body in which a polygonal insert insertion recess is formed, and a cavity formed in a polygonal shape smaller than the insert insertion recess of the mold body and inserted into the recess. a positioning member that positions the insert by pulling the insert to a predetermined corner of the insert insertion recess, and a fixing device that removably fixes the insert to the mold body. A mold comprising: a recess into which a insert larger than the recess for inserting the insert can be inserted at a position other than the corner of the recess for inserting the insert of the mold body. Type. 2. The mold according to claim 1, wherein the positioning member is a bolt movably provided on the mold body and screwed into the insert. 3. The mold according to claim 1 or 2 of the utility model registration claim, characterized in that a plurality of positioning members are provided. 4. Any one of claims 1 to 3 of the claims registered as a utility model, characterized in that the insert insertion recess of the mold body is formed into a through hole having a step so that the insert having a step passes therethrough. Mold described in Crab. 5. The mold according to claim 4 of the utility model registration, characterized in that an extrusion pin insertion hole for extruding the product that has appeared in the cavity is formed in the nest.