JPH0156885B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a rubber material in which a plurality of pressure vulcanization devices each having a built-in mold are sequentially supplied to a rubber material injection device to perform continuous vulcanization. Injection molding of plastics, etc.
Regarding vulcanization equipment.

[Conventional technology]

Conventionally, transport-type injection molding and vulcanization equipment has multiple pressure vulcanization equipment with built-in molds installed on a transport device such as a rotary table, which is sequentially supplied to a rubber material injection equipment and then moved. By vulcanizing the rubber under pressure, taking out the vulcanized rubber, and then feeding it again to the injection device, the rubber injection molding and vulcanization operations can be repeated.

However, multiple pressure vulcanization devices installed on a transfer device such as a rotary table must each be integrally equipped with a pressure device to close and pressurize the built-in mold, and this is not normally used. The pressurizing device is also a hydraulic cylinder device, and the overall size of the injection molding/vulcanization device has to be increased. Furthermore, the pressurizing device using a hydraulic cylinder requires hydraulic piping from the hydraulic source to each pressurizing and vulcanizing device via a rotary joint, resulting in a complicated structure and frequent accidents such as oil leaks. Furthermore, since a hydraulic cylinder is continuously operated to keep the mold clamped during vulcanization, there are also drawbacks such as high energy consumption.

[Problem that the invention seeks to solve]

The present invention reduces the size and simplifies the pressure mechanism for mold clamping required for a pressure vulcanization device, thereby making the overall size smaller, less likely to break down, and easier to maintain and manage. The purpose of the present invention is to provide a transfer type injection molding/vulcanization device that consumes less energy.

[Means for solving problems]

an outer frame, a lid fixed to one end of the outer frame, a movable plate disposed inside the outer frame than the lid and movable in the length direction of the outer frame, and a movable plate held between the movable plate and the lid. a compression spring fixed to the other end of the outer frame; a pressure rod inserted into the fixing block from outside so as to be movable in the length direction of the outer frame; A pressurizing movable plate provided at one end of the pressurizing rod so as to be movable as the pressurizing rod moves, and an upper mold and a lower mold disposed facing each other between the pressurizing movable plate and the movable plate. A pressurizing movable plate is moved to the lid body side by a pressurizing rod to form a gap between the fixed block and the pressurizing movable plate, and the pressurizing movable plate is placed in the clamped state of the mold in this gap. and a fixing member provided on a fixing block so as to hold the rubber by the repulsive force of a compression spring; an external pressure device for moving a pressure rod of a pressure vulcanization unit, which is provided at one stop position of one pressure vulcanization unit transferred by the transfer device; It is placed on the side facing the external pressure device of the pressure vulcanization unit stopped at the above-mentioned stop position, and receives the pressure applied to the pressure vulcanization unit from the external pressure device via the pressure rod. The present invention is characterized by comprising: an apparatus; and an injection apparatus for injecting material into the mold of the pressure vulcanization unit, which is provided at the above-mentioned stop position.

The fixed member includes a rotating block held by the fixed block so as to be able to rotate around the pressure rod, a plurality of columnar spacers protruding from the movable pressure plate toward the rotating block, and a movable pressurizing block provided on the rotating block. It can be configured with a plurality of perforations so that the columnar spacers can be inserted and removed in accordance with the movement of the plate. In this case, the pressurizing movable plate is moved toward the mold by the pressurizing rod, and the rotating block is rotated to shift the positional relationship between the columnar spacer and the perforation, so that the columnar spacer is placed on the rotating block. Since it is held, the pressurizing movable plate does not return to the rotating block side, and the mold clamping state can be maintained by the action of the compression spring. In order to rotate the rotating block, if a rotating device connected to the rotating block is installed, the rotating operation can be easily performed. Further, the fixing member may be a threaded cylinder having a thread on the outer periphery so that it can rotate around the pressure rod, and may be fitted with a thread formed on the inner surface of the fixing block, or it may simply be attached to the fixing block. Even if a spacer block is inserted from the side into the gap formed between the pressurizing movable plate and the pressurizing movable plate, the mold clamping state can be maintained.

To supply the heat necessary for rubber vulcanization, etc., a heating plate may be placed between the mold, the movable plate, and the pressure movable plate, or a heating furnace may be installed in the middle of the transfer device. .

The transfer device can be a rotary table, annular or linear rail, etc., and the external pressurizing device can be an ordinary hydraulic cylinder etc. equipped with a ram etc. that comes into contact with the pressurizing rod of the pressure curing unit. good. An important point is that only one external pressurizing device, such as a hydraulic cylinder, needs to be installed at one stop position of the curing unit.

The pressure receiving device only needs to be able to receive the pressure applied to the pressure vulcanization unit via the pressure rod by the external pressure device on the opposite side. a fixed frame disposed on the lid body, a spacer rod protruding from the fixed frame disposed on the lid body and replaceable depending on the size of the pressure vulcanization unit, or a fixed frame disposed on the lid body; A movable spacer may be provided which is removably inserted into the gap between the fixed frame and the lid and which can be replaced depending on the size of the pressure curing unit.

〔Example〕

The apparatus of the present invention will be described in further detail with reference to FIGS. 1 and 2.

As shown in FIG. 2, the pressure vulcanization unit according to the present invention has a lid 2 fixed to one end of an outer frame 1, and a movable plate 3 disposed inside the lid 2 along the length of the outer frame 1. It is arranged so that it can be moved in the direction. A compression spring 4 such as a disc spring or an open coil spring is sandwiched between the lid 2 and the movable plate 3, and repulses the movable plate 3 and the lid 2 to move the movable plate 3 toward the other end of the outer frame 1. It's like pushing. A fixing block 7 is fixed to the other end of the outer frame 1, and a pressure rod 5 is disposed so as to be movable in the length direction of the outer frame 1, passing through the center of the fixing block 7 from the inside to the outside. A pressurizing movable plate 6 is provided at one end of 5.
Between the pressure rod 5 and the fixed block 7, a rotating block 8 which can rotate around the pressure rod 5 is supported by the fixed block 7. A plurality of columnar spacers 9 protrude from the pressurizing rod 5 side of the pressurizing movable plate 6, and a plurality of perforations 10 are formed at positions corresponding to these columnar spacers 9 on the rotating block 8.
is provided so that the columnar spacer 9 can be inserted into and removed from the perforation 10 as the pressure rod 5 moves.

A heating plate 13 having a built-in heater 14 is fixed to the inside of the movable plate 3 , that is, on the opposite side from the compression spring 4 through a heat insulating material 15 .
A heat insulating material 15 and a heating plate 13 are similarly fixed to the inside of the housing. Furthermore, between these heating plates 13, 1
An upper mold 11 and a lower mold 12 forming a pair of molds are arranged.

Pressure curing unit 20 having such a structure
As shown in FIG. 1, a plurality of these are mounted on a rotary table 19 rotated by a drive motor 26. Although only two pressure vulcanization units 20 are shown in FIG. 1 for the sake of simplicity, it is of course possible to install three or more pressure vulcanization units 20. A first fixed frame 21 is provided below the rotary table 20, and a second fixed frame 22 is provided above it in a swan neck shape. The first fixed frame 21 has an external pressurizing device 23 such as a hydraulic cylinder device that is separate from the pressure curing unit 20, and an upwardly protruding ram 24 is transferred by the rotary table 19 and held in a predetermined position. The pressure rod 5 of the stopped pressure curing unit 20 can be pushed toward the second fixed frame 22. At this time, the second fixed rod 2
2 and the pressure curing unit 20, a movable spacer 25 of a size corresponding to the gap between the two is installed so that it can be inserted into and removed from the gap by a hydraulic cylinder 27 or the like, and the movable spacer 25 is moved forward. By filling the gap between the second fixed frame 22 and the pressure curing unit 20, the pressure curing unit 20 can be removed from the external pressure device 23 installed on the first fixed frame 21.
It has become subject to pressure exerted by Further, a normal injection device 28 is arranged vertically movably above the pressure vulcanization unit 20 that has been supplied to a predetermined position and stopped, and press-fits the rubber material into the mold inside the pressure vulcanization unit 20. An injection nozzle 29 extends through the movable spacer 25.

In this embodiment, the pressure curing unit 20 is arranged vertically with the pressure rod 5 at the bottom, but it may also be arranged vertically with the pressure rod 5 at the top. However, the pressure curing unit 20 can also be arranged horizontally. Alternatively, the injection device may be placed next to the mold to perform horizontal injection.

In the embodiment of FIG. 1, the fixing member is the pressure rod 5.
An example has been shown in which the rotary block 8 is held by the fixed block 7 so as to be able to rotate around the rotary block 7, and a plurality of columnar spacers 9 protrude from the pressurizing movable plate 6 toward the rotary block 8. A threaded cylinder having a thread on its outer periphery, which is rotatable around the pressure rod, may be fitted with a thread formed on the inner surface of the fixing block.

[Effect]

The pressure curing units 20 are intermittently transferred one by one to a predetermined position facing the injection device 28 by the rotation of the rotary table 19. When the pressure curing unit 20 stops at a predetermined position, the movable spacer 25
moves laterally and is inserted between the second fixed frame 22 and the pressure curing unit 20, filling the gap between them. Next, the external pressure device 23 on the first fixed frame 21 is actuated, causing the ram 24 to rise and push up the pressure rod 5 of the pressure curing unit 20. As can be seen from FIG. 2, the movement of the pressure rod 5 causes the pressure movable plate 6 and the lower mold 12 to rise.
It comes into contact with the upper mold 11 and further pushes it up. As a result, the movable plate 3 compresses the compression spring 4,
Repulsive force is stored in the compression spring 4. When the pressure rod 5 moves upward by a predetermined distance in this way,
The columnar spacer 9 provided on the pressurizing movable plate 6 is removed from the perforation 10 of the rotating block 8. Normally,
At this point when the mold is clamped under high pressure by the external pressurizing device 23, rubber material is injected into the mold from the injection device 28. Next, the rotating block 8 supported within the fixed block 7 is rotated by the rotating device 30 to shift the position of the perforation 10 from the columnar spacer 9, and then the pressure from the external pressure device 23 is released. Since the columnar spacer 9 is not inserted into the perforation 10 but is supported on the rotating block 8, the lower mold 12 hardly descends, and the repulsive force of the compression spring 4 can maintain the clamped state of the mold.

In this state, the pressure vulcanization unit 20 is maintained in a mold-clamped state without receiving any external pressure. Therefore, the ram 24 of the external pressurizing device 23 is lowered, and the injection nozzle 29 of the injection device 28 is moved to the second position.
Raise it to the fixed frame 22 and move the movable spacer 2
5 is moved backward, the rotary table 19 is intermittently rotated by the drive device 26, so that the next pressure curing unit 20 can be transferred to a predetermined stopping position. on the other hand,
The pressure vulcanization unit 20 in which the rubber material is injected into the mold is vulcanized by heating the hot platen 13 with the heater 14 during transportation.

When opening the mold to take out the obtained rubber product from the mold, when the pressure curing unit 20 stops again at another stop position, the pressure curing unit 20 is stopped by the external pressure device 23. Slightly raise the pressure rod 5 and move the columnar spacer 9 to the rotating block 8.
and rotate the rotary block 8 to drill the hole 1.
0 is aligned with the columnar spacer 9. next,
When the pressurizing rod 5 is lowered, the columnar spacer 9 is inserted into the perforation 10 of the rotary block 8, and the lower die 12 is pushed by the push rod 17 containing a spring and separated from the upper die 11, and is then pushed into the stopper 18. It descends until it makes contact. On the other hand, the upper mold 11 is held by the hook 16 and its descent is restricted, and the upper mold 11 and the lower mold 1
2 is separated and the rubber product can be recovered. If necessary, remove the hook 16 during the mold clamping state, lower the upper mold 11 and lower mold 12 together with the stacked one to the stopper 18, and slide the upper mold 11 and the lower mold 12 on the stopper 18. While the rubber product is removed from the pressure curing unit 20 and introduced into a mold disassembly device (not shown) to recover the rubber product from the mold, another mold can also be installed in the pressure curing unit 20. In addition, when using a large rotary table, etc.,
One more external pressure device and one more pressure receiving device may be arranged at a position other than the predetermined stop position.

The compression spring 4 may be any spring as long as it can apply the above-mentioned repulsive force to the movable plate 3, and for example, a disc spring, an open coil spring, etc. can be used. The deflection of the spring between when the mold is opened and when the mold is closed is set to approximately 2 mm.
It was possible to obtain a pressing force of approximately 5 tons using two sets of disc springs.

Although the above embodiments and operations have been explained using injection molding and vulcanization of rubber as examples, the apparatus of the present invention can also be used for molding plastics.

〔Effect of the invention〕

According to the present invention, a compression spring is used as a mold clamping mechanism for a mold for pressure vulcanization, and the compression spring and the mold are integrated into a compact pressure vulcanization unit. Only one external pressurizing device required for pressurizing operation during closing operation is required, eliminating the need for hydraulic cylinders, rotary joints, hydraulic piping, etc., providing an extremely compact and simple injection molding/vulcanizing device. can. Therefore, the device is inexpensive, requires a small installation space, and is easy to maintain and manage. Furthermore, during pressure vulcanization of rubber or the like, the mold is kept in a clamped state by the repulsive force of the compression spring, so energy consumption is low and it is economical.

[Brief explanation of drawings]

Fig. 1 is a schematic partially cutaway side view showing an embodiment of the apparatus of the present invention, and Fig. 2 is a cross-sectional view of the pressure vulcanization unit used in the apparatus of the present invention, with the mold released in the left half. The state and the right half show the mold clamped state. DESCRIPTION OF SYMBOLS 1... Outer frame, 2... Lid, 3... Movable plate, 4... Compression spring, 5... Pressure rod, 6... Pressure movable plate, 8... Rotating block, 9... Column shape Spacer, 10...Perforation, 11...
...Upper mold, 12...Lower mold, 13...Heating plate, 20...
Pressure vulcanization unit, 23...External pressure device, 25
...Movable spacer, 28...Injection device.

Claims (1)

[Scope of Claims] 1. An outer frame, a lid fixed to one end of the outer frame, a movable plate disposed inside the outer frame than the lid and movable in the length direction of the outer frame, and a movable plate. A compression spring held between the lid bodies, a fixing block fixed to the other end of the outer frame, and a pressurizer inserted from the outside of the fixing block into the fixing block so as to be movable in the length direction of the outer frame. a pressure movable plate provided at one end of the pressure rod in the outer frame so as to be movable as the pressure rod moves; a mold having an upper mold and a lower mold; a pressurizing movable plate is moved toward the lid body side by a pressurizing rod to form a gap between the fixed block and the pressurizing movable plate;
a rubber pressure vulcanization unit comprising a fixing member provided on a fixed block so that the pressurizing movable plate can be held in this gap with the mold clamped by the repulsive force of the compression spring; A transfer device for holding the pressure vulcanization unit and transferring it intermittently; An external pressurizing device for moving the pressurizing rod of the unit; disposed on the side opposite to the external pressurizing device of the pressure curing unit stopped at the above-mentioned stop position, and for moving the pressurizing rod from the external pressurizing device. A pressure receiving device for receiving the pressure applied to the pressure vulcanization unit via the pressure vulcanization unit; and an injection device for injecting material into the mold of the pressure vulcanization unit provided at the above-mentioned stop position. Injection molding/vulcanization equipment featuring: 2. The pressure receiving device is characterized by comprising a fixed frame arranged on the opposite side of the pressure vulcanization unit from the external pressure device, and a movable spacer that can be inserted into and removed from the gap between the fixed frame and the pressure vulcanization unit. and
A rubber injection molding/vulcanization apparatus according to claim 1.