JPH03180220A - Plural parts forming die - Google Patents

Abstract

PURPOSE:To shorten the number of days required for die manufacturing and to improve the working efficiency by setting the slit crossing the intermediate part of the adjacent parts to be formed, and setting the sub-die to punch the connecting part of the outside of the slit of the blank between the adjacent forming parts of the die. CONSTITUTION:When the upper die 4 is lifted, the blank holder 18 is lifted up with the spring 9, and the blank W is mounted on this blank holder 8 and the upper die 4 is descended. In the state of the blank W being in contact with the punch, the tip 6a of the pirecing punch 6 is operated to the connecting part 15 of the blank W cooperating with the pirercing die 11 and punches out the two pieces of scraps 18 from the blank W, and separates to the two parts to be formed W1, W2. Further, when the upper die 4 is descended, the parts to be formed W1, W2 are descended while being clamped with the upper die 4 and the blank holder 8, and worked with drawing in cooperation with the punches 3, 3 and the formed goods 20, 20 are obtained. Therefore, because the die for dividing is needless, the number of days required for die manufacturing can be shortened and the working efficiency is also improved.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a multi-component molding die suitable for simultaneously drawing a plurality of parts from a single blank.

(Prior Art) Conventional multi-component molds are usually supplied with two blanks, molded at multiple locations at the same time, and then separated in the next process. It is also known to provide a slit that does not reach both ends at the boundary in order to facilitate the drawing of the material t-[ into the part to be formed (Japanese Patent Laid-Open No. 63-140727).

(Problems to be Solved by the Invention) Since the workpiece formed by the above-mentioned method is a continuous part without being joined at the outside of the slit, the workpiece is not joined at the outside of the slit, so the workpiece is not joined at the outside of the slit, so it is difficult to There are cases where it is necessary to separate continuous parts, and for this reason, in the prior art, a separation process must be provided, a mold for the separation process is required, and the work efficiency is increased by 9 times per process, resulting in inefficiency. be. An object of the present invention is to improve this point and improve productivity.

(Means for Solving the Problems) The means for solving the above problems of the present invention is to provide a plurality of molding parts in a mold for molding, to form a plurality of molded parts in one blank, and to In a multi-component mold, a slit is provided across the intermediate part between the molded parts to process several molded parts at the same time. The present invention is characterized in that a sub-die is provided for punching out the outer continuous portion of the slit of the blank.

(Function) Since the above-mentioned structure is provided, the sub-mold operates in conjunction with the molding process of a plurality of molded parts, thereby punching out the connection part connecting adjacent molded parts and separating each molded part. do.

(Tip h&Example) Hereinafter, a practical example will be explained with reference to the drawings. Figures 1 and 2
In the figure, 1 is a mold of the present invention, and 2 is a lower mold thereof, which is provided with two bunches 3.3 on the left and right sides. The upper die 4 is formed with left and right dies 5, 5 which work together with the lower die, and a pair of pierce punches 6 are attached to both front and rear end sides between the dies 5, 5 with their lower two tips 6a protruding. ing. The piercing bunch 6 constitutes an auxiliary mold 7 together with a piercing die to be described later.

Between the lower die 2 and the upper die 4, a blank holder 8 for holding the blank W is held in a floating manner by a cushion or a spring, and the blank holder 8 has a bunch 3.
There are two openings to and to through which the piercing punch 6 passes, and a piercing die 11 is provided on both front and rear sides of the intermediate position of the opening 10. ing.

As shown in FIG. 4, the blank W has two parts to be formed.
4, W2, with continuous parts 15.15 at both ends at the boundary.
Small holes te, te and slit 17 are provided, leaving . The small hole 16 is provided to allow the cutter to escape when forming the slit, and is not necessarily necessary.

When the upper die 4 is raised as shown in Fig. 1, the blank holder 8
is raised by the spring 9, and when the blank W is placed on the blank holder 8 and the upper mold 4 is lowered, the tip 6a of the piercing punch 6 is moved with the blank W in contact with the bunch.
cooperates with the piercing die 11 to form a continuous portion 15 of the blank W.
15, the two scraps 1B are punched out from the blank W and divided into two formed parts W, , W2 as shown in FIG. When the upper mold 4 is further lowered, the molded part -1+
1112 is lowered while being held between the upper mold 4 and the blank holder 8, and drawn in cooperation with the bunches 3, 3 to obtain a molded product 20.20.

In this way, since one blank is fed into the multi-component mold 1, material feeding is easily performed, and then the adjacent workpieces W, W2 are divided by the auxiliary mold 7. Since the material can be drawn freely during the forming process, drawing can be easily performed and there is no need to perform a dividing process after the forming process.

In the above embodiment, the blank is divided before forming using the piercing punch 6 integrated with the upper die 4.
Alternatively, the piercing punch 6 may be slidably provided on the holder, and the piercing punch 6 may be applied during or after the forming process by the bunch 3 and the die 5 using a two-stage pressurizing device.

(Effects of the Invention) As described above, since the auxiliary mold that separates the continuous parts at both ends of the slit of the blank is provided in the multi-component mold,
There is no need to make a separate mold for cutting, which results in a significant reduction in mold manufacturing costs and a shorter mold manufacturing schedule. Furthermore, since there is no need to carry out the dividing operation using a separate dividing mold, there is an effect of improving work efficiency.

[Brief explanation of drawings]

Figure 1 is a longitudinal sectional view of an embodiment of the present invention, Figure 2 is at the start of molding, Figure 3 is at the end of molding, Figure 4 is an oblique view of the blank, and Figure 5 is when the auxiliary mold is working. FIG. 3... Bunch 5... Die 6... Piercing punch 7... Auxiliary mold 11... Piercing die 15... Continuous part 17... Slit
W... Blank W,, W2... Part to be formed Fig. 1 Fig. 2 Fig. 3 Fig. 4 Fig. 5

Claims (1)

[Claims] A plurality of molding parts are provided in a molding die, a plurality of molded parts are provided in one blank, and a slit is provided across the intermediate part between adjacent molded parts, and the plurality of molded parts are formed. A multi-component mold for simultaneously processing a plurality of parts, characterized in that a sub-mold is provided between adjacent molding parts of the mold for punching out a continuous part outside the slit of the blank, Multi-component mold.