JPH0249604B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a rubber vulcanization device.

In a rubber vulcanizing apparatus using a conventional mold, it is necessary to apply strong pressure to the mold using a mold clamping device until vulcanization is completed. For this reason, conventional rubber vulcanizing equipment is equipped with heating wires, etc. on a pair of pressure plates of the pressure device.
The upper and lower molds were each fixed to the pair of pressure plates, and the molds were clamped together and heat was transmitted to the molds, which vulcanized the rubber.

This conventional vulcanizing equipment requires one mold clamping device for vulcanizing one mold, and since the mold is heated with a pressure plate, mold clamping for one mold is required. There was a problem that the equipment ratio was large and the equipment was expensive. In addition, because it is difficult to insulate conventional vulcanizing equipment, the thermal efficiency is low, and the thermal efficiency generally used for vulcanization is as low as about 3 to 10%.

The vulcanizing device of the present invention is different from the conventional mold vulcanizing device and overcomes its drawbacks.The vulcanizing device of the present invention overcomes the drawbacks of the conventional mold vulcanizing device. The present invention provides a device for reducing the number of mold clamping devices and improving thermal efficiency.

That is, the vulcanizing apparatus of the present invention includes a vulcanizing member having a vulcanizing chamber having a mold insertion port at the bottom and a mold ejecting port at the top and extending in the vertical direction, and a plurality of vulcanizing members stacked vertically in the vulcanizing chamber. The device is characterized in that it is comprised of a push-up member that pushes up each mold upward.

In the vulcanizing apparatus of the present invention, the clamping force of the mold required during vulcanization is achieved by the load of another mold laminated on the required mold. Then, new molds are supplied one after another from the mold insertion port provided below the vulcanizable member, these molds are sent upward, and the vulcanized rubber is removed from the mold ejection port provided above the vulcanizable member. This is a device that takes out the mold and performs continuous vulcanization.

In the vulcanizing apparatus of the present invention, the vulcanizing chamber of the vulcanizable member extends in the vertical direction, and the laminated molds are sent upward from below within the vulcanizing chamber extending in the vertical direction. The heat required for vulcanization of the mold is supplied from the inner wall surface of the vulcanization chamber to heat the mold, and the heated mold vulcanizes the rubber material. Therefore, this vulcanizing member can be configured to have a chimney-like vulcanizing chamber inside the tower, and a heater member such as a nichrome wire can be embedded in the peripheral wall of the tower. The lower end surface of this tower-shaped vulcanized member,
Alternatively, openings serving as mold insertion ports and mold removal ports are provided on the side wall surface near the lower end and the upper end surface, or on the side wall surface near the top end, respectively. A push-up member is provided below the vulcanizable member to push up the molds stacked on top of each other.

As the push-up member, a hydraulic device, a mechanical pantograph mechanism, or other conventionally known push-up devices can be employed. The push-up member is also used to form a space below the vulcanization chamber of the vulcanization member into which a mold to be newly vulcanized is inserted. A new mold is inserted into the space opened by this lifting device, and all the other molds in the vulcanization chamber are placed on top of this mold and their full weight is applied. Then, the vulcanized mold is taken out from the upper outlet of the vulcanized member and circulated. In this vulcanizing device, the greatest clamping force acts downward, and the clamping force decreases upward.

Note that the vulcanization apparatus of the present invention can be provided with an injection member for injecting the rubber material into the cavity of the mold. When this injection member is provided, it is preferable to provide a mechanical mold clamping member in addition to the mold clamping force due to the gravity of the stacked molds in order to withstand the injection pressure during injection of the rubber material. This mold clamping member may be one that clamps only the lowermost mold into which the rubber material is injected, or it may be a mold clamping member that simultaneously clamps all the molds stacked in the vulcanization chamber.

As a mold clamping member that clamps only the lowermost mold, a hydraulic device that presses the upper part of the lowermost mold downward can be provided to pressurize the mold between it and the floor surface. When clamping all the stacked molds,
A hydraulic device is provided above the vulcanizing member to push it down, and all molds are clamped. Note that as the injection member for injecting the rubber material into the clamped mold, an injection device or a rubber injection device in which an extrusion device for supplying raw rubber is connected to the injection device can be used as is. Note that the injection port to the mold may be provided on the lower surface of the mold or on the side surface of the mold.

In the vulcanizing apparatus of the present invention, it is preferable to provide a mold clamping member such as a hydraulic pressure member to provide the mold clamping force for injecting the rubber material into the mold, but the relatively small mold clamping force required during vulcanization is This is accomplished by the loading of an upper mold laminated to the mold. Therefore, the mold clamping member can be made very simple.
Further, heating of the mold required for vulcanization is supplied from the inner peripheral surface of the vulcanization chamber extending in the vertical direction of the tower-shaped vulcanizing member, and the mold is heated as the mold advances upward. Since the outer peripheral surface of the heating chamber can be insulated and the heat cannot be radiated to the outside, thermal efficiency is increased, and approximately 50% of the heat used can be used for vulcanization.

Examples will be explained below.

FIG. 1 shows a perspective view of a vulcanizing apparatus according to an embodiment of the present invention. This device mainly consists of a desk-like base 1 and a base 1.
The vulcanizing tower 2 and the vulcanizing tower 2 fixed to the central upper plate 11 of
An injection device 3 and a push-up device 4 are provided vertically below the base 1 between the upper plate 11 and the lower plate 12 (Fig. 2).
and an extruder 3 that supplies the rubber material to the injection device 3.
1 and a rubber material temperature control chamber 32 provided in one corner of the upper plate 11, move in the left-right direction along the upper surface of the upper plate 11, and insert the mold into the vulcanization chamber 2a (Fig. 2). It consists of a mold insertion device 21, a mold removal device 22 which is installed horizontally at the upper end of the vulcanization tower 2 and extrudes the mold in the horizontal direction, and a mold lowering device 5 which is installed parallel to the vulcanization tower 2. ing. Note that a mold insertion port 201 is opened on the left side surface of the vulcanization tower 2 in the lower view, and a mold removal port 202 is opened on the left side surface of the upper end of the vulcanization tower 2. Further, as the mold clamping device 6, a hydraulic device is provided at the upper end of the vulcanization tower 2 to push it down.

The configuration of this device is schematically shown in FIG. In a vulcanization chamber 2a above a chimney provided inside the vulcanization tower 2, molds 7 are stacked vertically. Here, as the mold 7, a two-part mold consisting of an upper mold 71 and a lower mold 72 is used. Furthermore, guides (not shown) are provided on the upper and lower surfaces of each mold 7 so that the molds 7 can be stacked in the vertical direction, so that the molds can be stacked securely. Note that the mold insertion device 21, the mold removal device 22, and the mold lowering device 5 are not shown in FIG. The vulcanizing apparatus of this embodiment has the above configuration.

Next, the operation of this vulcanizer will be explained. First, the mold ejecting device 21 is moved to horizontally extrude the mold 7 protruding above the vulcanization chamber 2a, and the mold 7 is placed on the workbench of the upper plate 11 using the mold lowering device 5 (FIG. 1).
rain down Then, open the mold 7 and insert the cavity 7.
Take out the vulcanized rubber molded product from inside a. Further, a mold coating agent or the like is applied as necessary, the upper mold 71 is aligned with the lower mold 72, and the mold is closed. Simultaneously with this operation, all the molds 7 in the vulcanization chamber 2a are pushed upward by the mold pushing device 4 to open a space below the vulcanization chamber 2a into which the molds 7 are inserted. In this state, the mold insertion device 2
1 (Fig. 1) to open the mold insertion port 20 of the vulcanization tower 2.
Insert type 7, which is newer than 1. After the mold 7 has been inserted, return the push-up device 4 to its original downward position, and
Hydraulic pressure is supplied to the mold clamping device 6, the pressure plate 1 is lowered, and mold clamping force is applied to all molds 7 in the vulcanization chamber 2a. In this state, the rubber material supplied into the cylinder chamber 3a from the extruder 31 is injected into the cavity 7a of the mold 7 by the injection molding machine 3. When the injection of the rubber material is finished, the hydraulic pressure of the mold clamping force is removed as described above, the pressure plate 61 is raised upward, and the uppermost mold 7 is removed.
is taken out by the mold removal device 22, the mold 7 is lowered onto the workbench by the lowering device 5, and the vulcanized molded product is taken out from inside the mold 7.

This device repeats the above operations and continuously vulcanizes the rubber in the mold 7. For explanatory purposes, the magnitude of the clamping force acting on each mold 7 is shown at the left end of FIG. 2. In this diagram, the horizontal axis represents the mold clamping force, and the vertical axis represents the height of the molds 7 stacked in the vulcanization chamber 2a. As each mold 7 rises from the bottom to the top within the vulcanization chamber 2a, it is subjected to the mold clamping force shown in this figure.

In the apparatus of the present invention, a plurality of molds 7 can be clamped by one mold clamping device 6, and the ratio of the number of mold clamping devices 6 to the number of molds 7 can be made very small. In addition, the heat required for vulcanization is supplied from the inner wall surface of the vulcanization tower 2, and the vulcanization tower 2 can efficiently insulate its outer peripheral surface, so the heat required for vulcanization can be efficiently supplied. It can be used for.

In addition, the vulcanization chamber 2a is shown in FIG. 3 as the mold clamping device 6'.
2 schematically shows a device for clamping only the lowermost mold 7. This mold clamping device 6' is connected to the lower surface of the vulcanization chamber 2a,
The upper end of the mold 7 that is in direct contact with the lower surface of the mold 7 is pressed downward by a hydraulic device, and only the mold 7 into which the rubber material is injected is clamped. The vulcanizing operation of this vulcanizing apparatus is almost the same as that of the apparatus shown in FIG. 2, with the only difference being the mold clamping device. The mold clamping force when this device is used is shown on the left side of FIG. 3. In this device, the mold clamping force by the mechanical mold clamping device acts only when the rubber material is injected, and at other times the mold is clamped only by the load of the mold stacked above the mold.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a vulcanizing apparatus shown in an embodiment of the present invention, Fig. 2 is an explanatory diagram of main parts of the vulcanizing apparatus shown in Fig. 1, and Fig. 3 is a modification of the vulcanizing apparatus shown in Fig. 1. FIG. 1... base, 2... vulcanization tower, 3... injection device,
4... Push-up device, 5... Lowering device, 6... Mold clamping device, 7... Mold.

Claims (1)

[Claims] 1. A vulcanizing member having a vulcanizing chamber extending vertically and having a mold insertion opening at the bottom and a mold ejection opening at the top; A vulcanizing device comprising a push-up member that pushes a mold upward. 2. The vulcanizing apparatus according to claim 1, wherein an injection member for injecting rubber into the cavity of the mold is provided below the vulcanizing member. 3. The vulcanizing apparatus according to claim 2, wherein a mold clamping member for clamping the mold into which rubber is injected with the injection member is provided below the vulcanizing member. 4. The vulcanizing apparatus according to claim 2, wherein a pair of pressurizing parts constituting a mold clamping member for vertically clamping the mold in the vulcanizing chamber are provided above and below the vulcanizing member.