JPS60891B2 - Centrifugal molding equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a centrifugal molding device for molding resin pipes, mortar pipes, and composite pipes, and an object of the present invention is to provide a centrifugal molding device that is free from core runout and can be operated safely. It's there to provide.

Hereinafter, one embodiment of the present invention will be explained based on the drawings.

In FIG. 1, the area above the rotation axis A indicates the time of molding the socket part, and the area below shows the time of molding the entire body. 1 is a rotary type, and has annular parts 2 and 3 forming both ends, and these annular members 2 and 3.
The mold main body 4 is attached between opposing surfaces of the mold body 4, and is connected to a rotary drive device 5.

In the figure, a two-line Okatoki molding method is shown, but this may be a one-line or three or more-line forming method. The rotary drive device 5 includes a rotating shaft 10 supported by a pair of fixed frames 6 and 7 via bearings 8 and 9, logical bodies 11 and 12 attached to both ends of this rotating shaft 10, and these logical bodies 11. , 12, and a drive unit (
(not shown), and the outer circumferences of the logical bodies 11 and 12 are formed into arcuate surfaces 11a and 12a. Ring contact surfaces 15 and 16 are formed on the outside of the outer peripheries of the annular members 2 and 3, and are received by the logical bodies 11 and 12, and on the inside thereof, a circumferential groove 17 is formed in which the annular protrusions 13 and 14 are fitted. , 18 are formed. Furthermore, convex curved surfaces 19 and 20 are formed on the inner periphery corresponding to the circumferential grooves 17 and 18. Furthermore, annular recesses 21 and 22 are formed on the opposing inner surfaces of both annular portions 2 and 3. At both ends of the mold body 4, outwardly extending ring portions 23 and 24 are integrally formed. These ring portions 23 and 24 can be tightly iron-filled into the annular recesses 21 and 22, and in the iron-filled state, they are integrated with fixtures 25 and 26 from three positions in the circumferential direction. Reference numerals 27 and 28 are end face jigs that can be fixed to both the ring parts 23 and 24 from the outside, and are closely aligned with the inner circumferential surfaces 29 and 30 of the annular parts 2 and 3, and , 24 via seal rings 31 and 32;
It consists of cylindrical parts 27B and 28B which are integrally arranged outward from the inner edge of the metal parts 27A and 28A.

These end face jigs 27 and 28 are constructed by applying ring-shaped presser fittings 33 and 34 between the outer surfaces of the annular members 2 and 3 and the flanges 27A and 27B, and between the presser fittings 33 and 34 and the annular member. 2 and 3 and the IJ ring parts 23 and 24 are fixed by integrating them with fixing tools 35 and 36 from three positions in all directions around the circumference. Reference numeral 37 denotes a cylindrical socket inner surface regulating device that is fitted inside the socket side end face jig 28 and is movable in the direction of the rotation axis A. The molded socket 0 is protruded inwardly from the socket side end face jig 28. Cover the inner peripheral surface of the part.

A ball 39 is provided on the inner surface of the socket side end surface feeder 28 and is biased inwardly by a spring 38, and a ball 39 is provided on the outer surface of the socket inner surface regulating member 37 at two locations apart in the direction of the rotation axis A. Recesses 40 and 41 into which the ball 39 can be elastically inserted
is formed. The positions of these recesses 40 and 41 are such that when the inner surface of the receptacle side end surface feeding tool 28 and the inner surface of the receptacle inner surface regulating odor 37 are flush with each other, the recess 401 and the ball 39 are inserted into the receptacle inner surface regulating tool. The ball 39 is set so as to fit into the recess 41 when the ball 37 covers the inner peripheral surface of the molded socket. A release material chamber 42 is formed on the inner circumferential surface of the socket side end surface fitting 28, and seals 43 and 44 are provided on both sides of the mold release material chamber 42. A rotary pushing device 45 that can come into contact with the outer end surface of the receptacle inner surface regulating odor 37 is provided. This rotary pushing device 45 is connected to the cylinder 4
6, and an idler roll 47 which is attached to the piston rod and can be held against the outer end surface. The inner surface of the receptacle side end surface fitting 27 and the inner surface of the receptacle inner surface regulating odor 37 are formed into tapered surfaces 48 and 49 having an outer diameter larger than an inner diameter. Furthermore, inward annular protrusions 50 and 51 are formed at the inner ends of both tapered surfaces 48 and 49. 52, 53
is a swingable stopper, with rattan pins 54 and 55 in the middle.
It is attached to the fixed frames 6 and 7 via.

The upper ends of these stoppers 52, 53 are bent outward, and the lower surfaces of the bent portions are formed into stopper concave curved surfaces 56, 57 which can be inserted into the convex curved surfaces 19, 20. These convex curved surfaces 19, 20 and concave curved surfaces 66, 57 of the stopper are as follows:
It is formed by an arcuate surface centered on the mouse core of the horizontal pins 54, 55. Further, the lower ends of the stoppers 52 and 53 are bent inward, and these bent portions become locking portions 52A and 53A for the fixed frames 6 and 7. Cylinders 58 and 59, which are an example of a swing drive device for the stoppers 52 and 53, are provided between the locking portions 52A and 53A and the fixed frames 6 and 7. The area above the rotational axis A shows the time of molding the socket part.

In other words, the socket inner surface regulating device 37 has moved outward,
This position is maintained by the recessed portion 40' and the ball 39 being filled with iron. In this state, while rotating the rotary mold 1 around the rotation axis A by the operation of the rotary drive device 5, the socket molding of the mold body 4 is carried out through the center through hole of the socket side end surface odor control 27 or the socket inner surface regulation odor 37. Materials such as resin liquid, reinforcing fibers, and sand are supplied onto the inner peripheral surface of the receptacle part 60a, and the receptacle part 60a is centrifugally formed. Next, the rotary pushing device 4
5 is activated, and a predetermined amount of the receptacle inner surface regulation odor 37 is pushed through the idling roll 47 that moves forward. This pushed-in position is maintained by iron-fitting the pawl 39 into the recess 41.
Next, material is supplied onto the inner surface of the mold body 4 extending from the spout molding part to the chest molding part in the same manner as described above, and the tube 60 is centrifugally molded as shown below the rotation axis A.
When feeding the material, a part of it may fall into the inside of the socket side end face jig 27 or the socket inner surface regulating fixture 37, but
This is automatically discharged by outward-opening tapered surfaces 48 and 49. Further, since the annular protrusions 50 and 51 are located at the inner green end of the pipe 60 and the inner edge of the stepped portion of the receptacle, burrs are prevented from forming at these parts. After the centrifugally formed tube 60 is cured, the rotary mold 1 is stopped.
After moving the socket inner surface regulating device 37 outward,
The fixed odors 35 and 36 are released and the presser fittings 33 and 34 are removed. Next, the receptacle side end face holder 28 is removed from the rotary mold 1 together with the receptacle inner surface regulating member 37, and the receptacle side end face jig 27 is also extracted and removed from the rotary mold 1. Then, the tube 60 is extracted from the mold body 4. After that, both end surface pick-up tool 2
By attaching 7 and 28 to the rotary mold 1, molding can be performed again. In the far-zero molding as described above, the cylinder 5
8 and 59, the stoppers 52 and 53 are swung so that their locking portions 52A and 53A are released inwardly as shown by the imaginary lines in FIG.

The rotary mold 1 can thereby be removed from the rotary drive 5. After that, the fixed odors 25 and 26 are released and both annular parts 2 and 26 are removed.
3 and the mold body 4 are disassembled, and a new mold body 4 and both annular members 2 and 3 are roughly assembled to remove the fixed odor 25,
26 to form a rotary mold 1. The rotary mold 1 is mounted on the rotary drive device 5, and the stoppers 52, 53 are swung from the imaginary line to the solid line in FIG.
into the inside of the convex curved surfaces 19 and 20. Next, by attaching end face jigs 27, 28, etc., molding can be performed again. In this way, tubes of various diameters can be formed by replacing the mold body 4, but in this case, the assembly is performed by attaching the mold body to the annular recesses 21 and 22 formed in the common annular members 2 and 3. Since the ring parts 23 and 24 at both ends of 4 are iron-filled, mold bodies 4 with various molding surfaces are prepared.
By standardizing these ring parts 23 and 24, precision can be ensured no matter which mold body 4 is attached.
Since the pipe is brought into contact with and fixed from the outside, the connecting part (mating surface) between the two does not come out on the outside of the pipe (product), and no burrs will form on the outside, making maintenance easier and reducing costs. It can be measured. Rotating type 1 in operation
is the ring I1 that touches the ring contact surfaces 15 and 16 from below,
12, and is prevented from moving in the direction of the rotational axis A by the annular protrusions 13 and 14 that fit into the circumferential grooves 17 and 18, and further protrudes inward from the convex curved surfaces 19 and 20. 57 prevents it from floating upward. As a result, the rotary mold 1 can rotate without center runout, and the stoppers 52 and 53 can prevent the rotary mold 1 from falling off, so that safe operation can always be expected. As described above, according to the present invention, the rotary type rotation is prevented from moving in the direction of the rotational axis by supporting the ring contact surface with the ring and by iron-fitting the annular protrusion to the circumferential groove. Further, the concave curved surface of the stopper protruding inside the convex curved surface prevents the product from floating upward, thereby enabling rotation without center runout and improving product accuracy. In addition, the stopper having a concave curved surface prevents the rotating type from falling off, and safe operation can be expected without using large equipment such as a safety cover.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal sectional front view;
FIG. 2 is a plan view, and FIG. 3 is a sectional view taken along line BB in FIG. 1. 1... Rotating type, 2, 3... Annular member,
4... Molding mold body, 5... Rotation drive device, 6, 7... Fixed frame, 11, 12...
... Theory, 13, 14,. ．． ．． ．． ．． Annular projection, 15
, 16...Ring body contact surface, 17, 18... Circumferential groove, 19
, 20... Convex curved surface, 27, 28... End surface fitting,
37... Restricted odor inside the socket, 45. ．． ．． ．． ．． ．．
Rotary pushing device, 52, 53...stopper, 56,
57... Stopper concave curved surface, 58, 59... Cylinder (oscillating drive device), 60... Tube, 60a... Socket portion, A... Rotating shaft center. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 1 Form outward brim-shaped ring parts at both ends of a cylindrical mold body, form annular recesses on opposite sides of a pair of annular members, and after fitting the ring parts into these annular recesses. By fixing the annular member and the ring portion with a fixed odor, both the annular members and the mold main body form a rotary mold, and a ring contact surface and a circumferential groove are formed on the outer periphery of the annular member, respectively. A rotary drive device having a convex curved surface formed on an inner periphery corresponding to the groove, a pair of left and right wheels that receive the wheel contact surfaces, and an annular protrusion that fits into the circumferential groove and is integral with the wheels. A pair of stoppers are swingably attached to the fixed frame between the pair of left and right wheels and are perpendicular to the rotational axis of the rotary mold, and the upper ends of these stoppers are removed. At the same time, the lower surface of the bent portion is formed into a concave curved surface of the stopper, and the stopper is rocked so that the concave curved surface of the stopper is displaced between a position where it faces the convex curved surface from above and a position where it escapes inward. A centrifugal molding device characterized by being provided with a swinging drive device for moving the centrifugal molding device.