JPH0242416Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a centrifugal molding device for manufacturing resin pipes by charging resin or the like into a mold that is rotatable around a horizontal axis.

Conventional technology In the past, a resin pipe was centrifugally molded by putting resin etc. into a mold that can freely rotate around a horizontal axis, and the resin pipe was removed from the mold by rotating the horizontal axis relative to the mold. This was done by pulling out in the center direction or by dividing the mold in the circumferential direction.

Problems to be solved by the invention Among the conventional methods mentioned above, the circumferentially split method involves removing the mold from the rotary drive device after centrifugal molding, dividing the mold, removing the resin tube from the mold, and then reassembling it and rotating it. This is a device that is installed in a drive device, and with this, it takes time to remove the mold, resulting in inefficiency and a reduction in operation rate, especially when the mold is being heated to harden the resin. In addition, although the pull-out type can solve the problems mentioned above,
Since the drawing is carried out using a single bidirectionally operated cylinder device, the drawing operation is unstable, and the processing accuracy of the cylinder device must be improved, making it expensive.

Means for Solving the Problems In order to solve the above-mentioned problems, the centrifugal molding apparatus according to the present invention includes a mold that is rotatable around a horizontal axis in a frame, and a mold that is arranged around the horizontal axis on the outer periphery of the mold. An even number of cylinder devices are arranged at equal angles along the cylinder, and these cylinder devices are attached to the frame through the main body.Furthermore, the cylinder devices are of a one-way operation type with piston rods protruding on both sides, and their operation is The piston rods are arranged so that the directions alternate in the circumferential direction, and both ends of each piston rod are integrated by a connecting plate, and a demolding tool that can be inserted into and removed from the mold is attached to one of the connecting plates.

According to the configuration of the present invention, after the resin tube is centrifugally molded in the mold, the extrusion action side cylinder device group is operated to insert the demolding tool into the mold. The resin tube can be demolded by the extrusion action, and then the demolding tool can be moved in the opposite direction and extracted from the mold by operating the cylinder device group on the return action side.

Embodiment An embodiment of the present invention will be described below based on the drawings.

A mold 1 is rotatably supported by a frame 2 around a horizontal axis 3, and a plurality of molds are arranged with the horizontal axis 3 parallel to each other. The frame body 2, which is a common member, includes a top plate 2a, a bottom plate 2b, and a front plate 2c.
It is formed into a long box shape by a rear side plate 2d, a right side plate 2e, and a left side plate 2f, and further includes a leg member 4.
Installed via etc. Front side plate 2c and rear side plate 2d
has circular openings 5A, 5B, and cylindrical members 6A, 6B projecting outward are attached to the edges of the openings. The mold 1 consists of a cylindrical part 7 and end face jigs 8A, 8B which are detachably attached to both ends of the cylindrical part 7. A bearing 9 is provided between the cylindrical part 7 and both cylindrical members 6A, 6B.
It is rotatably supported around the horizontal axis 3 via A and 9B. Seal members 10A, 10B are provided on the outside of the bearings 9A, 9B, and nozzles 11A, 11B are provided on the inside of the bearings 9A, 9B.
Lubricating oil supply pipes 12A and 12B facing toward 9B are provided. A driven wheel 13 is fixed to the front end of the cylindrical portion 7, and the driven wheel 13 is interlocked with a driving wheel 15 of a motor 14 installed on the top plate 2a through an endless transmission body 16. Motor 1 with brake 17
4 is the output size depending on the diameter of the resin tube to be manufactured by each centrifugal molding device, that is, the shape of the mold 1.
Decide on small. At the outer ends of both cylindrical members 6A and 6B,
Cover plate 1 for closing the gap between mold 1
8A and 18B are installed. On the outer periphery of the mold 1, four (even number) cylinder devices are arranged along the horizontal axis 3 at 90 degree intervals (equally spaced). Here, the two cylinders located at one diagonal position are the extrusion action side cylinder device 19,
The remaining two cylinder devices are return action side cylinder devices 20. Both cylinder devices 19 and 20 include a main body 21 and
A large-diameter piston rod 22 that is inserted into the main body 21 so that a stepped portion thereof is located, and whose both ends protrude outward;
as well as the small diameter piston rod 23 and both rods 2.
Metals 24 and 25 that seal the sliding parts of 2 and 23
This is a one-way operating type in which the stepped portion serves as a pressure receiving surface 26. and both cylinder devices 1
9 and 20 are arranged so that the operating directions are opposite, that is, the pressure receiving surfaces 26 are opposite, and are attached to the frame 2 via the main body 21. A front connecting plate 27 is attached between the ends of both rods 22, 23 that protrude forward, and a rear connecting plate 28 is installed between the ends of both rods 22, 23 that protrude rearward.
is installed. A cylindrical body 29 is provided rearwardly protruding from the inner surface of the front connecting plate 27, and this cylindrical body 29
A demolding tool 31 having a pushing surface 30 is integrated into the free end of the mold. 32 is a resin pipe, 33 is a cooler, 34
35 is a hydraulic valve, 36 is an electric terminal, and 37 is a sensor.

A carry-out conveyor 40 is disposed outside and below the rear side of the centrifugal molding device group, and a material supply device 41 is disposed outside the front side. This material supply device 41 includes a cart 43 that is guided by floor rails 42 and can reciprocate in the lateral direction, and a material forming device that is guided by rails 44 provided on the cart 43 and can be moved in the direction of the horizontal axis 3. machine 45 and the horizontal axis 3
A material input tool 46, such as a screw conveyor, protrudes from the material forming machine 45 to be located approximately concentrically with the sand tank 48 into which sand from the sand processing device 47 is input, and a sand tank 48 into which the sand in the sand tank 48 is It consists of a sand conveyor 49 that supplies the material to the material forming machine 45, and the material forming machine 45 is equipped with a resin pump unit, a roving rack, a sand hopper, and the like. 50 indicates an overhead crane.

Next, the manufacturing operation of the resin pipe 32 in the above embodiment will be explained. Before molding, resin pipe 3 is shown in Fig. 5.
2 is not present, and the front connecting plate 27 moves apart due to the operation of the return action side cylinder device 20, and the mold 1
The demolding tool 31 is pulled out from the mold. Furthermore, as shown in the imaginary line, end face jigs 8A and 8 are attached to both ends of the cylindrical part 7.
I am wearing B. In this state, the mold 1 facing the material molding machine 45 is rotated around the horizontal axis 3 by the drive of the motor 14. Then, as the material molding machine 45 moves forward, the material charging tool 46 is inserted into the mold 1.
While inserting the mold into the mold, materials such as resin are added, and the desired centrifugal molding is performed. At the time of this insertion, the material input tool 46
passes through the cylindrical body 29, and after a predetermined amount has been put in, it is taken out. After the intended centrifugal molding is completed and the resin is cured, the rotation of the mold 1 is stopped. Then, the end face jigs 8A and 8B are removed, and this may be done by providing a removal device on the connecting plates 27 and 28 side and operating it. After removal, when the extrusion action side cylinder device 19 is operated, the demolding tool 31
enters the cylindrical portion 7, and the pushing surface 30 comes into contact with the end surface of the resin tube 32. After that, the resin pipe 32 is extruded,
The solid line in FIG. 5 indicates the extrusion process. The completely extruded resin tube 32 is received by a carry-out conveyor 40 and carried out.

The lubricating oil injected from the nozzles 11A, 11B to the bearings 9A, 9B during centrifugal molding is received in the frame 2, cooled in the cooler 33, and then reused.

Effects of the Invention According to the present invention having the above configuration, after centrifugally molding a resin tube in a mold, the extrusion action side cylinder device group is operated to insert the demolding tool into the mold and perform the extrusion action. This allows the resin pipe to be demolded, and demolding can be carried out efficiently and without reducing the operating rate. In addition, the force of a plurality of unidirectionally operating extrusion-acting cylinder devices is collected on a connecting plate, and the demolding tool is moved via this connecting plate, so extrusion work can be performed stably, and each The cylinder device requires less machining and requires less precision, making it cheaper. After demolding, the demolding tool can be moved in the opposite direction and extracted from the mold by operating the return cylinder device group.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is an overall plan view, Fig. 2 is a side view of the same, Fig. 3 is a plan view of main parts, Fig. 4 is a rear view of the same, and Fig. 5 is a plan view of the same. FIG. 6 is a longitudinal sectional side view of the centrifugal molding device, and FIG. 6 is a longitudinal sectional view of the cylinder device. 1...Mold, 2...Frame, 3...Horizontal axis,
6A, 6B... Cylindrical member, 7... Cylindrical part, 8A, 8
B... End jig, 9A, 9B... Bearing, 10A,
10B... Seal member, 19... Extrusion action side cylinder device, 20... Return action side cylinder device,
21...Main body, 22...Large diameter piston rod, 2
3...Small diameter piston rod, 24, 25...Metal, 26...Pressure receiving surface, 27...Front connecting plate, 28
... Rear connecting plate, 29 ... Cylindrical body, 30 ... Pressing surface, 31 ... Mold removal tool, 32 ... Resin pipe, 33 ...
Cooler, 40... Carrying out conveyor, 41... Material supply device, 45... Material forming machine, 46... Material feeding tool.

Claims (1)

[Scope of utility model registration request] A mold rotatable around a horizontal axis is provided in the frame, and an even number of cylinder devices are arranged at equal angles along the horizontal axis on the outer periphery of the mold, and these cylinder devices are connected to the main body. Further, the cylinder device is of a one-way operating type in which the piston rods protrude from both sides, and is arranged so that the operating directions alternate in the circumferential direction, and connecting plates are connected between both ends of each piston rod. A centrifugal molding device characterized in that a mold removing tool that can be inserted into and removed from a mold is attached to one connecting plate.