JPH0576643U - Mold take-out mechanism - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a mechanism of a mold that allows a product (aluminum alloy casting) to be easily taken out from a lower mold and has a product of excellent quality without marks of extrusion pins. [Constitution] Inclined pins 5 are provided on both sides of the cavity 4 of the lower mold 2.
And the inside of the upper die 1 into which the inclined pins 5 are inserted is inserted into the cavity portion 3 on both sides of the cavity portion 3,
The movable piece 7 forming a part of No. 4 was mounted slidably without dropping.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention mainly relates to a mechanism for taking out a product from a lower die when casting an aluminum alloy casting (referred to as a product in this specification).

[0002]

[Prior Art]

 In order to cast a product with a die, gravity casting in which the molten metal is injected by gravity from above the die or low pressure casting in which the molten metal is pushed up from below the die is performed. Then, in order to take out the cast product from the mold, in the case of gravity casting, an extrusion pin is provided at a predetermined place on the upper die and the lower die, and when the die is opened, the product is first pushed out by the extrusion pin of the lower die. It is held in the upper die, and then the product is extruded by the extrusion pin of the upper die. On the other hand, in the case of low pressure casting, since the molten metal is poured from below, it is not possible to provide an extrusion pin on the upper and lower molds of the structure, and another mechanism is used.

[0003]

[Problems to be solved by the device]

 When the product is taken out by the extrusion pin, the trace of the extrusion pin is left on the surface of the product and the appearance of the product is deteriorated and the quality is deteriorated. An object of the present invention is to provide a product take-out mechanism capable of taking out a product from a lower mold without using an extrusion pin and improving the quality of the product.

[0004]

[Means for Solving the Problems]

 The present invention has been made in order to achieve the above-mentioned object, and the composition of the means is a mold comprising an upper mold and a lower mold having a cavity for casting a product, wherein the cavity of the lower mold is Sloping pins that incline toward the outside are planted on both sides of the upper mold, and on both sides of the cavity of the upper mold, the inner side is part of the cavity and the lower side projects below the parting plane. The movable piece that has an inclined hole that can be fitted into the groove formed in the lower mold and that can slidably fit with the inclined pin slides in the direction of the parting surface without falling off from the upper mold. It is characterized in that it is freely attached.

[0005]

[Action]

 When the upper mold is lifted and the mold is opened to take out the product, the part of the movable piece that is in contact with the product rises while sandwiching the product from both sides, and the product is taken out from the lower mold. At this time, the movable piece rises along the inclined pin, and as this rises, it slides outward away from the product, and the product-side surface of the movable piece opens. Therefore, the product taken out from the lower mold and lifted up with respect to the upper mold can be extruded onto the device for product transfer by the extrusion pin of the upper mold and transferred to a predetermined place.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. 1 is a sectional view showing a state after product casting, FIG. 2 is a sectional view taken along the line AA of FIG. 1, FIG. 3 is a sectional view taken along the line BB of FIG. 1, and FIG. is there.

The mold shown in the figure is for casting a cylindrical product 10. The mold is composed of an upper mold 1 and a lower mold 2, and both sides of a cavity portion 4 of the lower mold 2 have an inclination angle α toward the outside. = 5 ° A tilting pin 5 tilting is implanted (the tilting angle α varies depending on the product, but generally 2 to 5 ° is suitable). On the other hand, on both sides of the cavity 3 of the upper mold 1, the inner side 7a has a shape (a part of the cylindrical surface in the present embodiment) near the parting plane PL of the cavities 3 and 4, and the lower side 7b has a parting plane PL. The movable piece 7 which projects further downward and is fitted into the groove 8 formed below the parting surface PL of the lower mold 2 does not fall off from the upper mold 1 by the protruding portions 7c, 7c protruding laterally in FIG. The upper mold 1 is mounted so that it can slide in parallel with the parting plane PL. Further, the movable piece 7 is provided with an inclined hole 6 which is inclined similarly to the inclined pin 5 and is slidably fitted to the inclined pin 5. Then, when the molds are matched, as shown in FIG. 1, the inner side 7a of the movable piece 7 is continuous with the cavity 3 of the upper mold 1 and the cavity 4 of the lower mold 2 to form the outer diameter surface of the product 10. It is located in. Reference numeral 9 is an escape hole in the head of the pin 5 provided in the upper mold 1.

The operation of the above structure will be described below. In FIG. 1, an upper die 1 having a cavity portion 3 and a lower die 2 having a cavity portion 4 are matched with each other, a core 11 is set, and a molten aluminum alloy is injected from a spout (not shown) to produce a product 10. It shows a cast state. When the upper mold 1 is lifted and the mold is opened to take out the product 10 from the mold after the solidification of the product 10, the movable piece 7 also rises, but at this time, the inner side 7a of the movable piece 7 in contact with the outer diameter surface of the product 10 The part rises while the product 10 is sandwiched, and the product 10 is taken out from the cavity 4 of the lower mold 2.

At this time, since the movable piece 7 rises along the inclined pin 5, the movable piece 7 slides away from the product 10 along with this rise, and the inside 7a thereof opens (see FIG. 4). This state is shown). Therefore, the product 10 taken out from the lower mold 2 and raised with respect to the upper mold 1 is pushed out by the extrusion pin (not shown) of the upper mold 1 which is raised further than in FIG. It can be dropped and transported to other places.

[0010]

[Effect of the device]

 As described above, according to the present invention, it is possible to easily remove the product from the lower mold, which is relatively difficult in die casting, without using the extrusion pin, and therefore, the mark of the extrusion pin is formed on the surface of the product. It has the effect of improving the appearance of the product and contributing to the quality improvement of the product. In the above embodiment, an example in which a cylindrical product is cast has been described, but a product having another shape may be used, and the movable piece may be provided at a suitable position in several places.

[Brief description of drawings]

FIG. 1 is a sectional view showing a state after casting showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line AA of FIG.

3 is a cross-sectional view taken along the line BB in FIG.

FIG. 4 is a cross-sectional view showing a state where the mold is opened.

[Explanation of symbols]

 1 Upper Mold 2 Lower Mold 3 Upper Mold Cavity 4 Lower Mold Cavity 5 Tilt Pin 6 Tilt Hole 7 Movable Piece 7a Inside 7b Lower 8 Lower Mold Groove 10 Product 11 Core PL Parting Surface

Claims (1)

[Scope of utility model registration request] 1. A mold comprising an upper die and a lower die having a cavity portion for casting a product, wherein inclined pins that incline toward the outside are planted on both sides of the cavity portion of the lower die, and the upper die. On both sides of the cavity of the mold, the inside is a part of the shape of the cavity, and the lower side protrudes below the parting surface and can be fitted into the groove formed in the lower mold.
Also, a movable piece provided with an inclined hole slidably fitted with the inclined pin is mounted so as to be slidable in the direction of the parting plane without dropping from the upper die. Ejection mechanism.