JPS62127151A - Die casting method and die casting machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a die-casting method and a die-casting machine, and particularly to a die-casting method and a die-casting machine in which the steps from the product extrusion step to the take-out step are improved.

<Prior art> Products cast using a die-casting machine are usually released from the mold using an extrusion device (extrusion process), and then the biscuit portion of the product (
The feeder part) is grabbed and taken out with the take-out device (take-out process)
It looks like this.

Therefore, conventionally, as shown in FIG. 4, when designing a mold, the movable mold 1b side is set to hold the product to the mold 1.
Product A attached to movable mold 1b is extruded after opening the mold 5A buy 7
The product was extruded and released from the mold, and then a part of Viscera 1 (riseer part) A3 was grabbed and taken out by a take-out device (not shown).

However, depending on the shape of the product, even if the product is attached to the mold on the movable mold side, it may be partially taken away by the fixed mold side, resulting in a state where the product is not attached or the product may be destroyed. was there. Moreover, when the product is hugged by the movable mold, the product is extruded and released from the mold by the extrusion device after the mold has been opened, so the time until extrusion and release from the mold is shortened. As the clinging force becomes stronger, not only does a powerful extrusion device become necessary, but it also prevents the product from scratching the surface of the product by biting into the mold (movable mold), or causing problems such as warped or cracked products. It is easy to occur.

<Problems that the invention attempts to solve> The present invention has been made in view of the above-mentioned drawbacks of the conventional art, and it is possible to securely attach a product to a movable mold so that there is no risk of trouble occurring when taking out the product, There is no risk that the product will scratch the surface of the product due to it being bitten by the mold, or that the product will be distorted or distorted, and an extrusion device that is small and has a short extrusion bottle stroke can be used, making the die-casting method and die-casting machine more efficient. This is what we intend to provide.

Means for Solving the Problems〉 The die casting method of the present invention that achieves the above object extrudes the product from the fixed mold side to the movable mold side at the same time for about 1 space and 1 J,
The product is characterized in that the product is attached to the movable mold, and is further characterized by a skewer set so that the product is held against the fixed mold side when the mold is opened. Moreover, the die castings 1 to 1 of the present invention
Iso either installs an extrusion device on the fixed plate side, or installs an extrusion plate on the back side of the fixed mold, and engages the extrusion plate with a movable arm (= J-shaped arm) to open the mold. It is characterized by a small size that uses force to push the product toward the movable mold.

<Example> Hereinafter, an example of the implementation of the die casting machine of the present invention will be described based on the drawings.

The mold 1 consists of a fixed mold 1a and a movable mold 1b, which are installed on a fixed W2a and a movable mold 2b, respectively, and are used to inject WJm poured into an injection sleeve 3 with an injection plunger 4.
The product is formed by casting lv in the bit 5.

Then, the clinging of the product to the mold 1 is set on the fixed die 1a side, so that the product A clings to the fixed die 1a when the mold is opened. That is, as in the past, the cooling contraction force of product A is used, the loss gradient to the product is calculated, and the mold is designed so that product A temporarily hugs the fixed mold 1a when the mold is opened. At almost the same time, product A is extruded and attached from the fixed mold 1a side to the movable mold 1b side, and even if product A shrinks on cooling, it is possible.
This prevents it from clinging to Type I 1b.

In addition, on the fixed platen 2a side, specifically between the fixed platen 2a and the fixed mold 1a, the product A that was clinging to the fixed mold 1a during mold separation is pushed out, and the product A is transferred to the movable mold 1b almost at the same time as the mold is opened. An extruded IVA@6 is installed for attachment to the As shown in FIGS. 1 to 3, this extrusion device 6 is composed of an extrusion plate 6a, an extrusion bottle 6b, and an extrusion cylinder 6C as in the conventional case. Alternatively, as shown in FIGS. 4 and 5, an extrusion cylinder is not used, but a cylinder is used that utilizes the force of the movable mold 1b. When using the extrusion device 6 similar to the conventional one shown in FIGS. 1 to 3, the extrusion cylinder 6C is operated at the same timing as the molding operation of the movable mold 1b to remove the product A from the fixed mold 1a. Attach it to type a 1b. Also, the fourth
The extrusion device 6 shown in the figures and FIG. In this case, the mold opening force of the movable mold 1b is used to move the fixed mold 1 to the product in the same way as the mold-to-mold movement.
A is attached to the movable mold 1b.

When installing these extrusion devices 6, the fixed plate 2a may be installed in the recess 9 as shown in FIGS. 1 to 3, or the back side of the fixed die 1a may be placed inside the recess. Alternatively, as shown in FIGS. 4 and 5, a die block 10 may be installed between the fixed platen 2a and the fixed die 1a.
It is better to avoid installing the

Next, the die casting method according to the present invention will be explained with reference to the drawings of FIGS. 1 to 3.

First, after the mold is closed, the molten metal poured into the injection sleeve 3 is cast into the groove 1/bit 5 of the injection plunger 4'ei mold 1 to form the product Δ (the state shown in FIG. 1). Then V
After nearing, the movable 511-2b is moved back to open the mold. Then, since product A is hugging the fixed mold 1a, the extrusion IA device 6 works almost simultaneously with the mold release to extrude product A from the fixed mold 1a, and it is movable! Press ( ) to Xll1b (state shown in Figure 2). Next, when the molding operation is completed, the biscuit part (boiler part) A3 to the product
The sample is not taken out of the mold at Jll/υ using a take-out device (not shown) (the state shown in Fig. 3). And the mold key I? Bitay 5
After blowing and spraying the surface with air, the mold is closed again and the operations shown in Figure 1 and subsequent steps are repeated.

In addition, the product part is attached from the fixed mold 1a to the movable mold 1b/,
: During the rear mold listening operation, the product part moves from the movable mold 1b to 1152.
If there is a risk of the product falling, it is optional to form a boss A4 in a portion A2 other than the product portion A1 to provide a holding force to the movable mold 1b, as shown in the illustrated embodiment.

Further, in order to make it easier to take out the product A attached to the movable mold 1b, an extrusion device may optionally be installed on the movable mold 1b side.

<Effects of the Invention> In this way, the die casting method of the present invention extrudes the product from the fixed mold side to the movable mold side almost at the same time as the mold is opened, and avoids attaching the product to the movable mold. It can be attached to the movable mold reliably, and there is a risk that the product may be partially attached to the fixed mold side and become stuck, the product may be destroyed, or the product may shrink too much and become impossible to extrude. This eliminates the risk of trouble occurring when taking out the product.

Moreover, the time required to extrude the product and release it from the mold can be shortened, which prevents the finished product from shrinking too much, causing the product to bite into the mold and damage the surface of the product, or causing the product to become distorted or warped. There is no risk and there are no restrictions on the product shape, increasing the degree of freedom in design.

In addition, when the mold is opened, the product is set to cling to the fixed mold side, and the product is attached from the fixed mold to the movable mold almost at the same time as the mold is opened, so that the product is attached to the fixed mold side before it fully hugs the fixed mold. It can be attached to a movable mold, therefore, it does not require very strong force to extrude the product, and it is economical because a small and inexpensive extrusion device is required. Even if cooling shrinkage progresses, the product will not bubble up on the movable mold, so the product will not scratch the surface of the fixed or movable mold from curing to product removal, and will not damage the product surface or become difficult to remove. There is no risk of it becoming distorted or cracked.

In addition, since the die casting machine of the present invention has an extrusion device installed on the fixed platen side, not only the above-mentioned effects are achieved, but the stroke of the extrusion bottle of the extrusion device can be shortened, and the size of the extrusion cylinder is not required. In conjunction with this, it is possible to reduce the size and weight of the extrusion device.

Therefore, the intended purpose can be achieved.

[Brief explanation of drawings]

1 to 3 are cross-sectional front views showing an example of the implementation of the dark c-casting machine of the present invention in the order of operation steps, and FIGS.
The figures are cross-sectional plan views showing another embodiment of the present invention in the order of operating steps, and FIG. 6 is a sectional front view showing a conventional example. In the figure, 1 is a mold, 1a is a fixed mold, 1b is a movable mold, 2a is a fixed plate, 2b is a moving plate, 8 is an arm, and A is a product. Patent applicant: Fuso Light Alloy Co., Ltd. Figure 1 Figure 3 Figure 6

Claims (4)

[Claims] (1) A die casting method characterized by extruding the product from the fixed mold side to the movable mold side almost simultaneously with the opening of the mold, so that the product is attached to the movable mold. (2) The die-casting method according to claim 1, wherein the product is set so as to cling to the fixed mold side when the mold is opened. (3) A die-casting machine characterized by having an extrusion device installed on the fixed platen side. (4) An extrusion plate is installed on the back side of the fixed mold, the extrusion plate is engaged with an arm attached to the movable mold, and the product is pushed out to the movable mold side using the force of opening the mold. A die-casting machine featuring