JPS6037146Y2 - Knock-out device for molded objects in presses - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a knockout device for a molded object in a press, and more particularly to a knockout device suitable for application to a press with a relatively large load, such as an outdoor molding press for an automobile.

Conventionally, a rubber plate, rubber roll, or sponge rubber was attached to the top surface of the knockout plate of a device that knocks out the molded material in the female press mold for the purpose of stably supporting and discharging the molded material. ing.

Although these rubber knockout devices have been widely used in various fields and have been effective, they still have the following drawbacks.

In other words, ■ In the case of rubber plates and rubber rolls, they are initially well balanced and stably support the molded object, but as they are used over time,
Either one of the left and right rubber plates may wear unevenly, or the left and right may become unbalanced.

In such a case, the object to be molded is supported diagonally, so that the object to be molded may skid sideways and fall during upward movement and ejection.

Also, in the case of sponge rubber, it functions well at first, but as it is used over time, the oil in the mold may enter the numerous bubble holes in the sponge rubber, causing it to harden.

In such a case, the result is that the left and right sides are left unbalanced, and the molded object cannot be stably supported.

This invention was developed in view of operational considerations, and after the press molding is completed, the bristle material is folded in two across the core wire in the knockout device that lifts and discharges the molded material in the female mold. A knockout device for a to-be-molded object in a press, characterized in that a brush, the root of which is held by clamping fittings having a U-shaped cross section, is disposed on the top surface of the knockout plate of the knockout device. The purpose of this is to provide a means for stably supporting and knocking out a molded object at all times, regardless of the progress of its use.

Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is the male mold attached to the press ram, 2 is the female mold, 3a
, 3b are knockout plates of the knockout devices 4 located on the left and right sides.

The present invention is based on the above-mentioned device or a device having the same effect, with the following improvements made in order to distantly achieve the above-mentioned purpose.

That is, belt-shaped brushes A are attached to the upper surfaces of knockout plates 3a and 3b located on the left and right sides.

As the brush A, as shown in FIG. 4, a channel brush is used in which a bristle material 6 is folded in two across the core wire 5, and the bent root portion 7 of the bristle material is held between clamping fittings 8 having a U-shaped cross section.

The wire diameter and material of the channel brush bristle material depend on the press molding conditions.
You can choose as appropriate depending on the working conditions, and the example shown in the figure shows an example in which two band-shaped brushes A are attached to the upper surface of each of the left and right knockout plates 3a and 3b, but you can increase or decrease the number of brushes as appropriate, such as 3 or 4. can.

Then, put the brush A on the knockout plate 3a.

An appropriate metal fitting 9 may be used to attach it to the upper surface of 3b.

The knockout operation will be explained based on such a configuration.

The downward movement of the ram causes the male die 1 to move forward, thereby press-molding the object W in the female die 2.

At this time, as in the conventional case, the knockout plates 3a and 3b of the knockout device 4 are sunk below the female die 2 as shown in FIG.

Next, when the male mold 1 moves upward together with the press ram due to the completion of the molding process, the knockout plates 3a and 3b of the knockout device 4 protrude from the female mold 2 as shown in FIG. and make it protrude from the female mold 2.

At this time, the features of the present invention are demonstrated.

Since the brushes A are provided on the knockout plates 3a and 3b of the present invention, left and right imbalances are less likely to occur, and the object to be molded can be stably supported.

Therefore, even relatively heavy items can be molded safely.
Improve efficiency of press processing.

Various reasons can be considered for this, but the following seems to be a major reason.

The number of brush bristle materials constituting the brush A is nearly infinite.

Although they have the sole common purpose of supporting the molded object from below, each one is independent from the other.

Therefore, even if a specific hair material or a specific group of hair materials wears unevenly,
Uneven wear of the entire brush A, which collects the group of bristle materials, is unlikely to occur, and it does not cause a loss of stability when supporting from below.

Therefore, the support of the molded object W by the left and right brushes A and A is always stable.

On the other hand, in the case of rubber, it is a series of parts that are connected to each other, and wear of a specific part appears as wear of the whole, so it tends to become unbalanced from side to side. The support of W tends to be poor.

Furthermore, in the case of brush A, each bristle material of the brush provides resistance to the slipping of the object W to be molded, so it seems to stably support the object W to be molded.

In particular, each brush bristle material is independent from the others and can move freely, so each bristle material contacts the bottom surface of the molded object W in the most natural manner. It was decided that
Since it supports the molded object in a natural and natural manner, it can be stably supported at any time.

Furthermore, it is true that the oil in the female mold gets between the bristle materials, but the bristle materials of brush A open like a flower when supported by the object W to be molded, and when no load is applied. Since it closes directly due to its own rebound, the opening and closing action prevents as much as possible the adhesion of dirty oil particles.
This can prevent deterioration due to oil stains over a long period of time.

Therefore, it is possible to prevent the phenomenon in which the material solidifies like urethane rubber and cannot be stably supported.

As detailed above, in the present invention, a brush is attached to the upper surface of the knockout plate of the press knockout device, in which the bristle material is folded in two across the core wire, and the bent root portion is held between clamping fittings having a U-shaped cross section. Therefore, the object to be pressed can be stably supported and knocked out, thereby increasing the safety of the molding operation and improving the efficiency of press working.

[Brief explanation of the drawing]

The attached drawings show an embodiment of the present invention, and FIG. 1 is a view during the molding process, FIG. 2 is a view during the knockout process, FIG. 3 is a plan view of the female mold, and FIG. 4 is a portion of the upper surface of the knockout plate. It is a perspective view, in which 1 is a male type, 2 is a female type, 3at 3b is a knockout plate, 4 is a knockout device, 5 is a core wire, 6 is a hair material, 7 is a bent root, 8 is a clamping metal fitting, 9 is a stopper, A is a brush, and W is a molded object.

Claims (1)

[Claims for Utility Model Registration] ■ After the press molding is completed, in the knockout device 4 that raises the molded object W in the female die 2, brushes A are attached to the upper surfaces of the knockout plates 3a and 3b of the knockout 4. A knockout device for a molded object in a press, which is characterized by: ■ In the invention described in paragraph 1 of the claims for utility model registration,
The above-mentioned brush A is a brush in which the bristle material 6 is folded in two across the core wire 5, and the bent root part 7 is clamped with a clamping fitting 8 having a U-shaped cross section. Knockout device for molded objects.