JPH0825393A - Mold for beads foam molding - Google Patents

Abstract

PURPOSE:To reduce not only the cost and labor accompanied by the alteration of a shape or thickness but also the labor and space required in the keeping of a replacing member in the molding of a plate shaped beads foamed molded product. CONSTITUTION:Flat steam blowoff plates 2a, 2b are attached to the fronts of both master frames 1a, 1b and the attachment plate 3 held between both steam blowoff plates 2a, 2b at the time of mold clamping and demarcating the side periphery of a molded product cavity 4 is attached to one master frame 1a in a detachable manner. Since this mold can correspond to the alteration of the shape and thickness of a molded product only by replacing the attachment plate 3, the cost and labor accompanied by the alteration of the shape and thickness of the molded product can be reduced and the labor and space required in the keeping of a replacing member can be also reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold for bead foam molding, and more particularly to a mold suitable for molding a plate-shaped bead foam molding.

[0002]

2. Description of the Related Art Conventionally, as a mold for foaming beads,
A master frame type mold as shown in FIG. 5 is most widely used in order to facilitate mold replacement and reduce mold cost when molding different molded products.

In FIG. 5, 101a and 101b are fixed and movable master frames, 102 is a cavity mold,
103 is a core mold, 104 is a molded product cavity, 105
Raw material feeder, 106a and 106b are back plates,
107 is an ejector pin, 108 is a sealing material, 109
Is a reinforced support.

In the case of this master frame type mold, the cavity mold 102 and the core mold 103 are detachably attached to the master frames 101a and 101b respectively, and when molding different molded products, the cavity is used. This can be dealt with by removing and replacing the mold 102 and the core mold 103.

[0005]

However, since the cavity mold 102 and the core mold 103 each have a vent hole into which a core vent is driven, they are expensive members precisely machined according to the molded product. However, there is a problem in that the cost burden is large if these are prepared for different molded products.
Moreover, the reinforcement support 109 has to be replaced or adjusted together with the cavity mold 102 and the core mold 102, and the replacement work is troublesome. Furthermore, although the cavity mold 102 and the core mold 103 that have been replaced need to be stored, there is a problem that labor and space for storing both of them are required for the number of types of molded products.

The present invention has been made in view of such conventional problems, and in the molding of a plate-shaped bead foam-molded product, the cost and labor required for changing the shape and the thickness can be reduced and the replacement can be performed. The purpose is to reduce the labor and space required for storing the members.

[0007]

The means taken by the present invention for this purpose will be described with reference to FIG. 1. In the present invention, the flat steam blowing plates 2a, 2b are arranged so that their front faces are flush with each other. It is attached to the front side of each of the master frames 1a and 1b, and is attached to at least one of the master frames 1a and 1b, and both steam blowing plates 2a and 2b are provided at the time of mold clamping.
The attachment plate 3 that is sandwiched between b and divides the side periphery of the molded product cavity 4 is detachably attached.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, an embodiment of the present invention will be described with reference to FIGS.

In FIG. 1, 1a and 1b are master frames on the fixed side and the moving side, 5 is a raw material feeder, 6a,
6b is a back plate, 7 is an ejector pin, 8 is a sealing material, and 9 is a reinforcing support, and these are the same as conventional ones.

Flat steam blowing plates 2a and 2b are attached to the front sides of the master frames 1a and 1b (the molded product cavity 4 side), respectively. The vapor blowing plates 2a and 2b are used for the conventional cavity mold 10
2 and the core mold 103 (see FIG. 5) have vapor permeability, and as shown in FIG.
It has a vent hole 11 into which is injected.

The vapor blowing plates 2a and 2b in this embodiment are mounted so as to be fitted inside the master frames 1a and 1b, respectively. Further, as clearly shown in FIG. 2, the front surfaces of both steam blowing plates 2a and 2b are flush with the front end surfaces A and B of the master frames 1a and 1b, respectively. Therefore, the front sides of both the steam blowing plates 2a and 2b are flat.

An attachment plate 3 is detachably attached to the fixed master frame 1a. As shown in FIG. 3, the attachment plate 3 has a frame-like shape with an opening in the center, and is sandwiched between the steam blowing plates 2a and 2b at the time of mold clamping shown in FIG. It divides the circumference.
That is, in the mold of the present invention, the molded product cavity 4
Is formed as a space surrounded by the vapor blowing plates 2 a and 2 b and the attachment plate 3.

In the case of the mold according to the present invention, by opening the mold,
Molded products having different shapes or thicknesses can be formed only by replacing the attachment plate 3. That is, by exchanging the attachment plate 3 with one having a different opening shape and thickness, it is possible to form a molded product having a different shape and thickness.

Although the attachment plate 3 in this embodiment is attached to the fixed side master frame 1a side, when the ejector pin 7 is projected from the moving side to the fixed side, it is attached to the moving side master frame 1b. You can also Further, the attachment plate 3 may be divided into two or more parts, not a single plate as shown in FIG. Furthermore, the fixed side and moving side master frames 1
It is also possible to form the single molded product cavity 4 by attaching the attachment plates 3 to both a and 1b, and aligning the two attachment plates 3 during mold clamping.

Next, another mounting state of the attachment plate 3 will be described with reference to FIG. In FIG. 4, the same reference numerals as those in FIGS. 1 to 3 denote the same members.

The steam blowing plate 2 in this embodiment
The a and 2b are attached so as to cover the front end surfaces A and B of the master frames 1a and 1b, respectively, so that the front surfaces of the two steam blowing plates 2a and 2b are flush with each other.

In this way, the steam blowing plates 2a, 2
When b is attached, the front surface and both master frames 1a and 1b of the vapor blowing plates 2a and 2b are attached.
There is an advantage that the front end faces A and B need not be aligned one by one.

[0018]

The present invention is as described above and has the following effects.

(1) The member to be replaced when the shape or thickness of the molded product is changed is the attachment plate 3 which defines the side circumference of the molded product cavity 4, and is the conventional cavity mold 1
02 and the core mold 103, the cost is much lower than that of the core mold 102 and the core mold 103, so that the cost for changing the shape and thickness of the molded product can be reduced.

(2) The only member to be replaced when changing the shape or thickness of the molded product is the attachment plate 3 sandwiched between the steam blowing plates 2a and 2b, and it is necessary to replace or adjust the reinforcing support 9 during this replacement. I don't
Replacement work is extremely easy.

(3) Only the attachment plate 3 is a replacement member that needs to be stored, the number of storage members is small, storage is easy, and a storage space is not required.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a bead foam molding die according to the present invention.

FIG. 2 is an enlarged cross-sectional view near an attachment portion of an attachment plate.

FIG. 3 is a perspective view of an attachment plate.

FIG. 4 is a cross-sectional view showing another attachment state of the attachment plate.

FIG. 5 is a cross-sectional view showing a conventional bead foam molding die.

[Explanation of symbols]

 1a, 1b Master frame 2a, 2b Steam outlet plate 3 Attachment plate 4 Molded product cavity 5 Raw material feeder 6a, 6b Rear plate 7 Ejector pin 8 Sealing material 9 Reinforcement support 10 Core vent 11 Vent hole

Claims (4)

[Claims] 1. A flat steam blowing plate is attached to each of the front sides of both master frames so that the front surface thereof is flush with each other, and both steam blowing plates are attached to at least one of the master frames at the time of mold clamping. A bead foam molding mold, wherein an attachment plate that is sandwiched between the attachment plates and divides the side periphery of the molded product cavity is detachably attached. 2. The bead foaming mold according to claim 1, wherein the steam blowing plate is attached so as to cover the front end surface of the master frame. 3. The bead foaming mold according to claim 1, wherein the steam blowing plate is mounted inside the master frame with its front surface flush with the front end surface of the master frame. . 4. The bead foaming mold according to claim 1, wherein the attachment plate is divided into a plurality of pieces.