JPS58332A - Ejecting method for drawn product - Google Patents

Abstract

PURPOSE:To eject products from dies securely without using air, by positioning drawn products in punched holes of a raw material when upper dies are elevated, and sending the material while the products are held in the punched holes. CONSTITUTION:Upper dies 2 are lowered for drawing of a material W, and when they are elevated, a knockout 11 is pressed down by a spring 14 to leave products WM on lower dies 1. During the constant-pitch feeding of the material W, the height with which the material W floats over the top surfaces of the lower dies 1 is lower than at least the height of the products WM. Then, the products WM are ejected while held in punched holes WH and sent to a next stage, where they fall down to under the dies from products falling holes. This method secures the ejection of the products and uses no air, solving such a problem that a noise generated.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for ejecting a product drawn from a material using a press machine.

First, a method for ejecting a punched and drawn product using a conventional press will be explained. Figures 1 and 2 show general punching and drawing dies. In the same figure, (1) is the lower mold;
(21 is the upper mold. The lower mold (11) has a cylindrical drawing punch (5) and an annular punching die (6) fixed to the base (3) via a pedestal (4), respectively. A cylindrical wrinkle presser ring (7) is installed between the squeeze punch (51) and the punching die (6).
) is provided so as to be slidable in the vertical direction.

The wrinkle presser ring (7) is pushed upward by a push-up rod (9) which is constantly urged upward by a spring (8).
Its upper surface is set substantially flush with the upper surface of the punching die (6). The upper die (2) is a center of a cylindrical punch/drawing die Ql whose outer diameter is slightly larger than the inner diameter of the drawing die (6), and whose inner diameter is larger than the outer diameter of the drawing punch +51. A knockout αυ is provided on the periphery, and a stripper 0 is provided on the outer periphery so as to be slidable in the vertical direction. On the top surface of the knockout aυ is and It 12
) reaches the top dead center, the lower end of the hairpin bar α, which is lowered by the hairpin lever of the press, is brought into contact with it.

Now, when the upper It (21) descends against the lower M (11), the stripper a3 first presses the material to the punching die (6) of the lower It (11), and then presses the material with the punch and drawing die. The material is punched out by the punching die (6).Furthermore, when the lower die (1) descends, the punch/drawing die presses down the wrinkle holding ring (7), as shown in Figure 1. The peripheral edge of the circular plate punched from the material is drawn. After this, the upper II (21 is the product side punched from the material) is fitted into the inner diameter of the punch and drawing die. At that time, when the upper mold (2) reaches the top dead center, the knockout aυ is lowered by the lowering movement of the hairpin bar I by the hairpin lever of the press machine, and the product (W
, ) is ejected.

Conventionally, the product (wM) ejected from [12+] was blown out of the mold with air, so the product (WM) was not always accumulated in a fixed position, and the noise caused by the use of air was high. was a problem. In particular, when a plurality of products are extracted from lumber at the same time and processed into a pine tree, the ejection of the products becomes extremely unstable.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to reliably eject a product that has been squeeze-dyed from a material out of the metal, and to solve the problem of noise caused by the use of air.

That is, in the present invention, the product that has been punched and drawn from the material by the descending movement of the upper mold is positioned in the punching hole of the material when the upper mold is raised, and the product is drawn to the size of the punching hole when the material is fed. 5 to eject it out of the mold.

Hereinafter, one embodiment of the present invention will be described.
Let me explain about K. Figure t's and Figure 4 show a mold for carrying out the present invention. Here, the same parts as in Figures III and II are given the same reference numerals and their explanations are omitted. In this device, a spring α4 is provided in place of the hairpin bar 03 shown in Figures 1 and 2, and the spring a4 always urges the knockout aυ downward.

Therefore, after the material is punched and drawn by the downward movement of the upper It 123, when the upper die (2) rises, the knockout αυ is pushed down by the spring ti4, so that the material is punched and drawn. The product mass remains on the lower mold (1). Thereafter, when feeding the material by a certain pitch, the material is fed in such a state that the height at which the material floats above the upper surface of the lower mold (1) is at least lower than the height of the product (wM). Then, when the material is sent, the product f
fM) is ejected in a state where it is caught in the drawing height (wH), for example, as shown in Figure 5, and then sent to the next process. Finally, the product is dropped to the bottom of the mold from a product drop installed near the primary process.

Note that the present invention is not limited to the product KwI of the above embodiments, but can be applied to any product that is punched and drawn from a material and that can be drawn to the size of the punch.

According to the present invention, the product that has been punched out of the material by the lowering movement of the upper mold is positioned at the punching size of the material when the upper mold is raised, and the product is hooked in the punching hole when the material is fed. Since the product is ejected, the product can be ejected reliably, and the problem of noise can also be solved because air is not used like in the past.

[Brief explanation of the drawing]

Fig. 1 and Fig. 2 are cross-sectional views showing conventional drawing metal, Fig. Fig. 8 and Fig. 4 are cross-sectional views showing a life-saving type for applying the present invention, and Fig. 5 is a sectional view of the ejected state of the product. FIG. (1)...lower mold, (2)...upper mold, porcelain...material, ffM
)...product, (WH)...pull hole. Nef diagram

Claims (1)

[Claims] (1) The upper die is lowered relative to the lower die, and the material is punched and drawn by the downward movement of the souvenir, and when the upper die is raised, the drawn product is placed in the punched hole in the material. , a patented method for ejecting punched products that ejects the product by hooking it into the punched hole when feeding the material.