JPS62227708A - Vulcanization molder of rubber material - Google Patents

Abstract

PURPOSE:To eliminate the bite of air in rubber material by a method wherein an intermediate mold platen is mounted in a hollow body in such a manner as to be vertically movable by a small amount in order to allow the mold platens to be lapped one another by pressing with a male mold member behind the abutting of the upper end of the hollow body against a cover member. CONSTITUTION:In the state that rubber stocks are charged in an intermediate mold platen 4b in advance, a hollow body 6a is shifted so as to abut against a cover member 6b. Next, a male mold member 6c is fitted slightly into the hollow body so as to form an airtight space surrounding a mold frame among the cover member 6b, the hollow body 6a and the male mold member 6c in order to evacuate the space. Thus, the air included between an upper mold platen 4a and the intermediate mold platen 4b and the air included between a lower mold platen 4c and the intermediate mold platen 4b can be removed, because the intermediate mold platen 4b is held between a pair of upper and lower flanges 6a-1 and 6a-2 provided on the inner peripheral surface of the hollow body 6a so as to allow vertical movement by a small amount. When the lower mold platen 4c and the intermediate mold platen 4b are pushed up by a pressurizing member in the above-mentioned state, the mold platens are brought into a state of being lapped one another and vulcanization molding is performed with hot platens provided in the pressurizing member and in a pressure bearing member.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of industrial application) The present invention relates to a vulcanization molding apparatus for vulcanization molding a rubber or synthetic rubber material in a vacuum using a mold that can be disassembled into three or more pieces.

(Prior art) Conventionally, a mold is interposed between a pressure receiving member provided on a forming frame main body and a pressure member that can be moved up and down relative to the pressure receiving member, and a surrounding frame is provided to airtightly surround the mold. Japanese Utility Model Application No. 59-155118 discloses a method in which a rubber material placed in a mold is converted into a sulfuric acid form after the surrounding frame is evacuated.

(Problems to be Solved by the Invention) However, in this device, the surrounding frame is supported on the pressure receiving member side, and the pressure member is configured as a male member that fits into the surrounding frame,
In addition, each member supports a mold plate that is divided into upper and lower parts, and this type has the following disadvantages when performing vulcanization molding using a mold that can be disassembled into three or more pieces. .

In other words, when trying to perform vulcanization molding using a mold that can be disassembled into three or more pieces, the middle mold is always stacked on top of the lower mold, so there is no male mold in the surrounding frame. When creating a vacuum inside the surrounding frame after fitting a member into the surrounding frame to create a sealed space, the space between the intermediate mold plate and the lower mold is in a closed state, so there is no air between them. There are inconveniences such as it being difficult to remove and remaining as air bubbles that become entangled in the remaining air products.

(Means for Solving the Problems) The present invention provides an apparatus free from such inconveniences, which includes a pressure-receiving member provided in the molding machine body and a surrounding frame for working the pressure member, and inside the surrounding frame. The rubber material is pressurized and vulcanized in a vacuum mold, and the mold is configured into a disassembled mold consisting of upper and lower mold plates and at least one middle mold plate in between. A hollow body that moves the surrounding frame up and down in conjunction with an intermediate lifting device, a lid member that comes into contact with an opening end face of the hollow body on the pressure receiving member side, and an opening of the hollow body on the pressure member side. a male member that fits into this from the end face, an upper mold is supported on the lower surface of the lid member, a lower mold is mounted on the male member, and a medium plate is installed in the hollow body so as to be movable up and down, It is characterized in that the mold plates are pressed by the male mold member and overlapped with each other after the upper end of the hollow body comes into contact with the lid member.

(Function) The function will be explained according to what is shown in the drawings. In this state, the rubber fabric is loaded into the medium board in advance, and in this state, the hollow body 1 is moved by the drive device until it comes into contact with the lid member. Next, the male mold member is slightly fitted into the hollow body by a pressure member, as shown in the fifth fa, and an airtight space surrounding the mold is formed between the lid member, the hollow body, and the male mold member,
In this state, operate the vacuum pump to draw a vacuum.

In this case, the upper and lower mold plates and the middle mold plate are supported by the lid member, the hollow body, and the male mold member, respectively, and a gap is maintained between them, so that there is no space between them. Air can be removed.

When the lower die and middle plate are pushed up by the pressure member in this state, they are in a polymerized state as shown in Figure 6, and vulcanization is performed by the heating plate provided on the pressure member and the pressure receiving member. .

Next, when retracting the pressure member from the pressure receiving member after completion of vulcanization molding, the lower mold plate and the middle mold plate are first disassembled, and then when the hollow body is moved down by the lifting device, the upper mold plate and the middle mold plate are disassembled. is disassembled and prepared for the next demolding state.

(Example) An example of implementing the present invention will be explained with reference to the attached drawings.

In the drawing, (1) is a molding machine body comprising a pressure receiving member (2) and a pressurizing member (3) that can be moved up and down with respect to the pressure receiving member (2), and (4) is a molding machine body that is interposed between both parts i (2) and (3). The formwork (4) is composed of an upper mold board (4a), a lower mold board (4c), and a middle mold board (4b) interposed between them.

(5) is a heating plate provided on each member (2) (3), and (6) is a surrounding frame provided on the molding machine body (1) so that an airtight space can be formed around the mold (4). show.

To further explain this in detail, the surrounding frame (6
) is composed of a hollow body (6a), a lid member (6b) that is in airtight contact with the upper surface of the hollow body (6a), and a male member (6c) that can be freely fitted into the hollow body (6a). Attach the upper die board (4a) 1&: to the lower surface of the 6b).

Hollow body (6a), centering die plate (4c), male die member (6C)
) Attach the lower mold board (4b) to the top surface of the mold plate (4b). and a hollow body (
The installation of the medium-sized board (6c) inside the hollow body (6a)
) A pair of upper and lower collars (6a-1) (6a
-2) Hold Ono in the vertical direction between them to measure the movement of Ono.

Further, the hollow body (6a) is supported by an elevating device fFt (7) consisting of a piston cylinder (7a) and a pair of left and right arms (7b) that are moved up and down by the piston cylinder (7a), and is provided in the elevating and lowering HP. The member (6c) is provided so as to move up and down together with the pressure member (2).

What is shown in the figure is the hollow body (6a), the lid member (6b), the male member (6C), and the gold plate 3, which all constitute the surrounding frame (6).
As shown in the drawings and FIG. 4, in the disassembled state, the molding machine can be freely moved between the main body (1) of the molding machine and a working position on its side.

To explain this, these hollow bodies (6a) and both members (6b) (6C) are supported on guide rails (8a) (8b) (8c) spanning the molding machine main body (1) and the working position. and move them to both positions by a common extrusion device @(9).

This extrusion device (9) allows the male member (6c) to be freely moved by a piston cylinder (9a) connected to the male member (6c), and also includes a lump piece (9b) protruding from the male member (6c). ) and a lump (9) protruding from the hollow body (6a)
c), an arm piece (9d) protruding downward from the lid member (6b);
) to move them at the same time.

In addition, the hollow body (6a), the block piece (9b) and the lid member (6b)
and the arm piece (9d) are rotatably connected to each other around an axis 00, and the rail (8a) that guides the lid member (6b) is divided into two parts, one on the molding machine main body (1) side and the other on the working position side. The guide rail (8a-1) on the position side pivots around the base of the molding machine body (
1), and a piston cylinder α1) is fully interposed between the guide rail (8a-1) and the molding machine main body (1), and the piston cylinder (11) moves the position shown in the solid line shown in FIG. It can be tilted freely between the chain line positions.

In the drawing, (2) shows the hollow body (6a) pushed out to the working position.
A piston cylinder for tilting Pr is shown.

When doing this, make sure that the piston cylinder αη (6
) by tilting the lid member (6b) and the hollow body (6a) to create a large distance between them and each mold board (4a) (4b) (4c) supported by the male member (6c). As a result, the process of applying the release material to these parts makes it easy to attach the rubber fabric or to take out the product from them.

In the above embodiment, one medium-sized board (4b) was explained, but it may be plural, and in this case, as shown in FIG. Body (6
a)'ff: Just prepare it.

(Effect) According to the present invention, the enclosure includes a hollow body that moves up and down in conjunction with an intermediate lifting device, a lid member that comes into contact with the opening end surface of the hollow body on the pressure receiving member side, and the hollow body that moves up and down in conjunction with the intermediate lifting device. and a male member that fits into the opening end face on the pressure member side of the body,
An upper mold is supported on the lower surface of the lid member, a lower mold is mounted on the male mold member, and a middle plate is installed in the hollow body so that the small needle can move up and down, so that the upper end of the dedication hollow body comes into contact with the lid member. After a delay, each mold plate was forced to be enriched by the male mold member, so after evacuating the inside of the surrounding frame made up of the lid member, the hollow body, and the male mold member, the pressurizing member was applied. This allows each mold/plate to be overlapped by pressing the male mold member, which has the effect of preventing air from getting trapped in the rubber material.

[Brief explanation of drawings]

Fig. 1 is a side view of one example of implementing the present invention, and Fig. 2 is its ■-■
3 is an enlarged view of the cut main part, FIGS. 4 to 6 are explanatory diagrams for explaining the operating state, and FIG. 7 is a diagram showing the main part of a modified example. (1)...Molding machine body (2)...Pressure receiving member (3)
... Pressure member (4) ... Formwork (6) ... Surrounding frame
(6a)...Hollow body (6b)...Lid member
(6c)...2 people outside the male part

Claims (1)

[Claims] A mold is interposed between a pressure receiving member provided on the molding machine main body and a pressure member that is movable up and down and faces the lower surface of the pressure member, and a surrounding frame is provided to airtightly surround the mold. After the inside of the frame is evacuated, the rubber material in the frame is pressurized and vulcanized, and the mold is transformed into a decomposable mold consisting of upper and lower mold plates and at least one middle mold plate in between. In the configuration, the surrounding frame includes a hollow body that moves up and down in conjunction with an intermediate lifting device, a lid member that comes into contact with the open end surface of the hollow body on the pressure receiving member side, and a pressurizing member of the hollow body. A medium-sized board is constructed of a male member that is fitted into the opening end surface on the member side, an upper mold is supported on the lower surface of the lid member, a lower mold is attached to the male member, and the medium-sized board is movable up and down to a certain extent within the hollow body. vulcanization molding of a rubber material, characterized in that the mold plates are pressed by the male mold member and polymerized after the upper end of the hollow body comes into contact with the lid member. Device.