JPS6130757Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a mold that requires a device for taking out a product molded within the mold.

Conventionally, when molding a core by dividing the mold horizontally, a two-part method of upper and lower molds or a four-part method of inserting a device for pulling out to both sides between the upper and lower molds has been adopted. There is. In these methods, the upper mold and the lower mold are each provided with a product take-out device. In the conventional mold described above, when the upper and lower molds are released after the molding of the core is completed, the product core is pushed out by the upper mold ejection device and the product is attached to the lower mold, and the mold release is completed. When this happens, the product is extruded from the lower mold by the lower mold ejecting device, and the product is taken out from the mold.

Due to the structure of conventional molds, when taking out the product from the lower mold, an appropriate number of pin holes are drilled in the lower mold, and the ejector pins attached to the extrusion plate for taking out the product are pushed into the pin holes, and the product is removed from the lower mold. I was taking out the product. In the conventional structure described above, the ejector pin is often bent and the pin hole into which the ejector pin is inserted is frequently worn, and many man-hours are required to correct the bending.

In view of the above, this idea was developed to prevent bending of the ejector pins and wear of pin holes in the lower mold in the parts related to ejecting products from the lower mold (movable mold) in molds for casting or resin production. The object of the present invention is to provide a mold that can reduce the number of man-hours required for maintenance of the lower mold and shorten the working time by eliminating the mold.

Next, this invention will be explained based on embodiments shown in the drawings.

In FIGS. 1 to 4, the lower die 1 of the core molding die A has a parallelepiped shape, and the rectangular front and rear surfaces 2, 2 are parallel to each other. , 2, and both rectangular side surfaces 3, 3 are also parallel to each other. The lower mold 1 is provided with a cavity 5 for manufacturing the lower part of the core C, which will be described later, in the center of the upper surface 4, and this cavity 5 has small cavities 5a on both sides 3 and the upper end in the 3 directions. A pair is provided.

The upper mold 6 has approximately the same shape as the lower mold 1, and has front and rear surfaces 7, 7 and both side surfaces 8, 8, and a cavity 10 for manufacturing the lower part of the core C is provided in the center of the lower surface 9. It is being A pair of small cavities 10a are also provided on both sides of the lower part of the cavity 10.
The upper mold 6 has an appropriate number of supply holes 12 for filling the core sand S from its upper surface 11 toward the cavity 10. The connecting mold 13 consists of a rectangular plate-shaped sliding part 14 and a locking part 15 formed at a right angle to the sliding part 14 at the lower end of the sliding part 14. has an elongated hole 16 in its center (see Figure 2). The locking portion 15 of the connecting mold 13 has a trapezoidal shape with a lower width shorter than the upper surface, and a supporting portion 15a is formed by cutting out the tip of the upper surface. The upper mold 6 has a pair of guides 17 attached to the center of both side surfaces 8, 8 by an appropriate number of screws 18 for guiding vertical movement of the connecting mold 13 with respect to the upper mold 6. The connecting mold 13 has its locking part 15 connected to the upper mold 6.
Slide the sliding part 14 toward the inside of both guides 17.
After inserting the stopper pin 19 into the elongated hole 16 from the outside of the sliding part 14, the stopper pin 19 is screwed into the upper mold 6, thereby attaching the connecting mold 13 to the upper mold 6.

As described above, the connecting mold 13 attached to the upper mold 6 is movable upward and downward, and the connecting mold 13 is lowered so that the upper end of the elongated hole 16 touches the stopper pin 19. When abutting, the connecting mold 13 stops descending.

The other connecting fittings 13 are also attached to the opposite side surface 8 of the upper mold 6 in the same manner as described above.

Then, from the direction of both sides 3, 3 to the lower mold 1,
Recesses 5b into which the locking portions 15 of the connecting fittings 13 are inserted are respectively formed.

This mold A is made by placing the lower mold 1 on a base 20 of a casting machine that can move upward and downward, and fitting the locking parts 15 of both connecting fittings 13 into both recesses 5b of the lower mold 1. The lower mold 6 is fixed to the upper part of the mold by appropriate means. and,
Molding sand S is pushed through the supply hole 12 of the upper mold 6 into the cavities 5 and 10 and the small cavities 5a and 10a formed between the upper and lower molds 1 and 6. and,
After the core C is formed in the mold A, when the product core C is taken out from the mold, the extrusion plate 21 placed above the upper mold 6 is lowered, and the extrusion plate 21 is attached to the lower surface of the extrusion plate 21. A suitable number of extrusion pins 22 enter into the supply hole 12 of the upper mold 6 and push down the product core C.

Next, the operation of this embodiment will be explained.

After the product core C is formed between the lower mold 1 and the upper mold 6 of the mold A, when opening the mold by separating the upper mold 6 from the lower mold 1 in order to take out the product core C, first First, the extrusion plate 21 is lowered and the tip of the extrusion pin 22 comes into contact with the product core C. At the same time, the upper mold 6 and the lower mold 1 begin to open, and the upper mold 6 is fixed to the machine and the base 20 supporting the lower mold 1
descends. When the lower mold 1 descends together with the base 20, the product core C separates from the upper mold 6 and rests on the support portion 15a of the locking portion 15 of the two connecting molds 13 and the upper part of the lower mold 1. Then, the lower mold 1 descends together with the two connecting molds 13, which descend while being guided by the guides 17.

As the lower mold 1 descends, the upper ends 16a of the elongated holes 16 of the lower connecting molds 13 come into contact with the stopper pins 19, and the connecting molds 13 stop.
When the base 20 is further lowered from this state and the lower mold 1 is lowered, the product core C cannot be lowered because it is supported by both connecting molds 13, and it separates from the lower mold 1 and falls between both connecting molds 13. 13, and the product core C can be taken out from the two connecting molds 13 by hand or with an unloader or the like.

In the above embodiment, the locking portions 15 of the two connecting molds 13 are provided separately on both sides, but the locking portions 15 are formed into a single bar passing through the left and right sides, and the locking portions 15 of the product core C are It may be arranged to receive the part of the lower surface where there is less mold release resistance.

Next, FIGS. 5 to 7 show another embodiment of this invention.

This embodiment differs from the first embodiment in that the mold B is divided in the horizontal direction rather than upward or downward. What is manufactured by this mold B is not a core C but a cast product W. In the figure, the mold B has a fixed mold 23 that is fixed to a casting machine, and a movable mold 24 that forms a cavity 25 of the cast product W with the fixed mold 23. The fixed mold 23 has guides 26, 26 each having an appropriate number of screws 2 on both sides thereof.
It is attached by 7. The connecting mold 28 guided by the guides 26, 26 has a locking part 29 and an elongated hole 30 as in the first embodiment, and a stopper pin 31 for regulating the movement of the connecting mold 28 is fixed. They are attached to both sides of the mold 23, respectively.

This mold B has a fixed mold 23 and a movable mold 24 attached, and the molten metal is poured into the cavity 2 from the pouring port 32.
The hot water is poured within 5 minutes. When the movable mold 24 is moved in the direction of arrow C to open the mold in order to take out the product W after the solidification of the molten metal, the movable mold 24 moves and both the product W and the couplings supporting the product W are moved. The mold 28 moves. Then, the connecting mold 28
When the movable mold 24 moves further after contacting the stopper pin 31 and stopping, the product W is moved to the connecting mold 2.
8 (see FIG. 7). Therefore, this product W can be taken out in the same manner as in the first embodiment.

In this case, it is also possible to use a bar connecting the left and right sides of the connecting mold 28 to reduce mold release resistance.

Although the above embodiments have been explained regarding casting molds, the mold of this invention can also be used as a die-casting mold and a mold for resin production.

Further, in each of the above embodiments, the upper mold, the lower mold, the fixed mold, and the movable mold are made into parallelepipeds, but each pair of molds only needs to have their mating surfaces parallel to each other, and is not limited to a parallelepiped. Of course.

As mentioned above, this invention has a fixed mold and a movable mold, and when the movable mold is opened, it forms a part of the product cavity and a sliding part that moves together with the movable mold guided by a guide attached to the fixed mold. For molds that have a connecting mold consisting of a locking part that supports the product when the mold is opened, an elongated hole is provided in the sliding part of this connecting mold, and a fixed mold has an elongated hole that touches one end of the elongated hole. By configuring a mold with a forced ejection device by providing a stopper that comes into contact with the mold and stops the movement of the connecting mold, the following effects can be obtained.

(1) Since there is no need for an extrusion device to take out the product from the moving die of the mold, it is possible to reduce the number of processing steps during mold manufacturing and the number of assembly steps. Furthermore, since there is no wear on parts and the like related to product removal, the life of the mold can be extended and the number of maintenance steps can be reduced.

(2) Since the product is removed while the mold is opening,
The molding cycle using a mold can be shortened.

[Brief explanation of the drawing]

The figures show an embodiment of this invention. Figure 1 is a sectional view of the main parts of the mold, Figure 2 is a perspective view of the connecting mold, Figure 3 is a perspective view of the product (core), and Figure 4 is a perspective view of the product (core). 5 to 7 show another embodiment, FIG. 5 is a plan view of the mold, FIG. 6 is a front view of the mold, and FIG. 7 is a side view of the mold upon completion of mold opening. FIG. 3 is a plan view of the mold upon completion of opening. 1...Lower mold, 5...Cavity, 5a...Small cavity, 6...Upper mold (fixed type), 10...Cavity, 10a...Small cavity, 13...Connection mold, 14...Sliding Part, 15...Locking part, 15a
...Support part, 16...Elongated hole, 17...Guide, 1
9...Stopper pin, 23...Fixed type, 24...
Mobile type, 25...Cavity, 26...Guide,
28... Connection mold, 29... Locking part, 30... Long hole, C... Core, W... Casting product.

Claims (1)

[Scope of utility model registration request] A fixed mold, a movable mold forming a cavity for product production, and a sliding part that moves toward the movable mold guided by a guide provided on the fixed mold when the movable mold separates from the fixed mold and moves toward the movable mold. In a mold having a connecting mold consisting of a locking part that forms a part of the product cavity and supports the product when the mold is opened,
The sliding part of the connecting mold is provided with an elongated hole formed in the moving direction of the movable mold, and the fixed mold is provided with a stopper that comes into contact with one end of the elongated hole to stop the movement of the connecting mold. A mold with a forced ejection device featuring: