JPH0128684B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method for producing a planar plastic material such as a foamed concrete slab.

(Prior art) A flat plate-shaped plastic material such as a foamed concrete slab is constructed by a formwork assembled using a rectangular formwork and a bottom plate, in which the side plates of the formwork around the four sides can be disassembled into four individual side plates. A rectangular plastic material is molded, then demolded, and cut horizontally and then vertically, or vertically and then horizontally to produce the product.

(Problems to be Solved by the Invention) In the conventional manufacturing method described above, before injecting the slurry, the four side plates are attached to the bottom plate to form a formwork, and after the plastic material is formed, the four side plates of the formwork are attached to the bottom plate. Because it was disassembled into each side plate, it took time to mold the plastic material, and the assembly and disassembly of the formwork could not be automated, resulting in poor productivity.The cutting process also involved separate vertical and horizontal cutting. This method has disadvantages such as poor productivity and the fact that cutting takes up a large amount of space.

(Structure of the Invention) According to the present invention, the bottom of the formwork is provided on a cart, and four side plates of the formwork are integrally formed. A truncated quadrangular pyramid shaped plastic material is molded using a formwork with a trapezoidal cross-section that has a wider area at the bottom than at the top, and the integrated side plate of the formwork is pulled upward. After that, a horizontal cutting means having at least one steel wire and moving in the horizontal direction and a vertical cutting means having a plurality of steel wires fixed in parallel to each other are mounted on the same frame. ,
The frame is moved relative vertically using a cutting device in which the frame is relatively movable in the vertical direction, and in this state, the horizontal cutting means is moved horizontally, and then the frame is moved in the horizontal direction. A method for producing a plastic material, characterized in that the plastic material is cut in the horizontal and vertical directions by repeating the relative vertical movement of the and the horizontal movement of the horizontal cutting means to obtain a cut plastic material. It is.

The present invention will be explained below using examples. 1st
In the figures to FIG. 3, a formwork 1 for molding a truncated quadrangular pyramid shaped plastic material W has a bottom surface formed integrally with a cart to form a formwork cart 3, and this formwork cart The top surface of 3 is smooth. On the smooth upper surface of this formwork truck 3, a formwork 1 integrally formed with four circumferential side plates 2 and with open upper and lower surfaces is placed, and a plastic material W is molded by injecting slurry from above. Each side plate 2 of the formwork 1 is inclined upwardly to form a draft, and the vertical cross section of the formwork 1 formed by each side plate 2 has a trapezoidal shape that is wider at the bottom than at the top. It is showing. In this formwork 1, both opposing side plates 2 may be inclined, or only one side plate 2 may be inclined.

After injecting the slurry into the mold 1 formed as described above, the mold 1 is
is removed from the mold by pulling it upward using a demolding device.

Next, for example, while moving the formwork cart 3, the plastic material W is
At least one inclined side surface of the reference surface W' is cut out perpendicularly. Note that this operation is not necessary if the upper surface of the cutting cart 10, which will be described later, is inclined so as to match the inclination of the side plates of the form.

The cutting device 5 for cutting out the reference plane W' has a single steel wire 7 stretched vertically in a straight line on a pillar 6 formed in a portal shape. The steel wire 7 may be stretched vertically, but it may also be inclined forward and backward in the moving direction of the formwork truck 3. When the plastic material W is moved forward while being placed on the formwork truck 3, the vicinity of the side surface of the plastic material W is cut by the steel wire 7, and a reference surface W' is cut out.

The plastic material W from which the reference surface W' has been cut is transferred to the formwork truck 3.
The container is transported to the overturning device 8 while still being placed on it. Tipping device 8
A rotating base 9 having an L-shaped cross section is rotatably supported at its base 9a, and is configured to be rotated 90 degrees by a hydraulic device (not shown). The formwork truck 3 carried onto the base 9b on one side of the rotating base 9 is temporarily fixed so as not to move when the rotating base 9 rotates. A cutting cart 10 is carried into the base 9c on the other side of the rotating base 9 so as to be parallel to the reference plane W', and is temporarily fixed thereto. By protruding the cutting cart 10 toward the reference surface W' of the plastic material W, the reference surface
By applying pressure to W' and then rotating the rotary base 9 by 90 degrees in the direction of the arrow Q, the plastic material W on the formwork carriage 3 is transferred onto the cutting carriage 10. After the plastic material W has been transferred, the cutting cart 10 is moved to the cutting device 1.
Bring it into 1.

This cutting device 11 has a horizontal cutting means that moves horizontally and a vertical cutting means that moves relatively in the vertical direction mounted on the same frame. This horizontal cutting means has at least one steel wire and is movable horizontally within the frame. Also,
The vertical cutting means consists of a number of steel wires fixed to the frame parallel to each other. Using a frame equipped with these horizontal cutting means and vertical cutting means,
By moving the horizontal cutting means horizontally every time the frame is vertically moved, the plastic material can be cut in the horizontal and vertical directions. Therefore, using this cutting device 11, other non-vertical surfaces can also be vertically cut and removed.

An example of the cutting device 11 as described above is shown in the fourth example.
It is shown in FIGS. In the figure, a lifting frame 13 is provided on a machine frame 12 built on the floor so as to be able to rise and fall freely, and a steel wire 14 as a horizontal cutting means for cutting the plastic material W in the horizontal direction is attached to the lifting frame 13, and a steel wire 14 is attached to the lifting frame 13 in the vertical direction. A plurality of steel wires 15 are each stretched in a straight line as a vertical cutting means.

Both ends of the horizontal cutting steel wire 14 are held by a pair of carriages 16, which are provided so as to be able to reciprocate on the lifting frame 13. Note that the pair of carriages 16 are arranged with positions slightly shifted in the direction of movement. When the pair of carriages 16 move on the lifting frame 13, the upper part of the plastic material W on the cutting cart 10 is horizontally cut by the horizontal cutting steel wire 14. And this horizontal cutting steel wire 14
stops at the position where it comes out of the plastic material W after cutting.

Thereafter, the lifting frame 13 is lowered, and the plastic material W in the portion cut by the horizontal cutting steel wire 14 is vertically cut by a plurality of steel wires 15, thereby forming a plurality of cut plastic materials.

Thereafter, when the pair of carriages 16 move in the opposite direction to the previous direction, the lifting frame 13 is lowered, so the upper part of the remaining plastic material W whose upper part has been cut off is cut horizontally again by the steel wire 14. Ru. Subsequently, the lifting frame 13 is lowered and the cut portion of the plastic material W is vertically cut by the plurality of steel wires 15.

As described above, the movement of the pair of carriages 16 and the lowering of the lifting frame 13 progress the cutting of the plastic material W in the horizontal and vertical directions, and the vertical cutting steel wire 1
Lifting frame 1 after 5 comes out of the predetermined position downward.
3 rises, and the vertical cutting steel wire 15 escapes above the plastic material W.

The cut plastic material W is carried to the steam curing room while being placed on the cutting cart 10, or the plastic material W is transferred onto the curing cart (not shown) again on the rotating base 9. It is then transported to a steam curing room and cured for a predetermined period of time.

Next, the cutting device will be explained in detail using FIGS. 4 to 11.

As shown in FIGS. 4 and 5, a cutting device 11 for cutting plastic materials such as foamed concrete in a state where the hardening has progressed to a certain extent has a machine frame 12 constructed on the floor. A pair of rails 20 are arranged on the floor of this machine frame 12, and the cutting cart 10 on which the plastic material W is placed moves on these rails 20 and is carried into the machine frame 12. There is. An elevating frame 13 is provided on the machine frame 12 so as to be movable up and down. Means for raising and lowering the elevating frame 13 include hydraulic pressure, pneumatic pressure, and electric cylinders, but in this embodiment, rotation of a screw rod is used. Between the four corners of the beam 12a of the machine frame 12 and the floor surface, four screw rods 21 are respectively hung vertically and rotatably supported, and four nuts 22 fixed to the outer surface of the lifting frame 13 are installed. (only one is shown in FIG. 5) are each screwed into the screw rod 21. Then, by the screw rods 21 simultaneously rotating in the same direction, the elevating frame 13 is raised or lowered.

A gear (not shown) in a gear box 23 provided on the beam 12a is attached to the upper end of the screw rod 21. and is rotated by an electric motor 27 via a speed reducer 26.

A protector 28 that can come into contact with the end face of the plastic material W is provided at both ends (left and right ends in FIG. 4) of the lifting frame 13, and this protector 28 is directed toward the plastic material W by an actuator 29. He was forced to advance and retreat. The protector 28 has a plurality of narrow grooves 30 cut in the vertical direction at a predetermined pitch on the end surface thereof that comes into contact with the plastic material W. The pitch of this narrow groove 30 is provided to correspond to the thickness of the foamed concrete plate obtained by horizontally cutting the plastic material W, and when the horizontal cutting steel wire 14 moves to the end thereof, It is adapted to fit into the narrow groove 30.

A pair of parallel beams 13a provided on the lifting frame 13
As shown in FIG.
A carriage 16 is provided on both beams 13a so as to be able to reciprocate. Since these two carriages 16 are provided with a slight phase shift in the traveling direction, the horizontal cutting steel wire 14 stretched between both carriages 16 is placed at a constant angle with respect to the plastic material W. cut into. The end of the steel wire 14 is fixed to a winding shaft 31 supported by the carriage 16 with its axis oriented in the vertical direction. The winding shaft 31 has a circular cross section, and a part of its outer periphery is cut out in a substantially fan shape to form a notch 32, and a narrow groove 33 along the circumferential direction is formed on the outer periphery in the axial direction. Multiple cuts are made at a predetermined pitch. The pitch of the narrow grooves 33 corresponds to the thickness of the cut plate of the foamed concrete slab, and is the same as the pitch of the narrow grooves 30 of the protector 28. Notch end surface 3 of winding shaft 31
4 has a hole 35 of a required depth corresponding to the pitch of the narrow groove 33, and a part of the narrow groove 33 is cut to a depth that reaches the hole 35.

The winding shaft 31 of the carriage 16 on one side is fixed to the carriage 16 as a fixed side so as not to rotate, and the winding shaft 31 of the carriage 16 on the other side is rotatably supported by the carriage 16. A worm gear 36 is fixed to the upper end of the winding shaft 31 on the rotating side.
is meshed with a worm 37 supported horizontally on the upper surface of the carriage 16. A handle (not shown) is detachably attached to the shaft end of the worm 37.
The winding shaft 31 can be rotated by operating a handle attached to the end of the shaft.

The horizontal cutting steel wire 14, which is tensioned by the winding shaft 31, passes through a stopper 38 having a diameter larger than that of the horizontal cutting steel wire 14.
are fixed to both ends. Then, each stopper 38 is attached to the notch end surface 34 of each winding shaft 31.
At the same time, the steel wire 14 is inserted into the narrow groove 33 of each winding shaft 31.
Thereafter, when the rotating winding shaft 31 is rotated by a required angle by operating the handle, the steel wire 14 is tensioned. Note that the means for rotating the winding shaft 31 is not limited to the worm 37 and the worm gear 36.

On the other hand, a vertical cutting means for cutting the plastic material W in the vertical direction is stretched between brackets 39 that are erected to face each other on the lifting frame 13. The bracket 39 has a U-shaped cross section, and a winding shaft 40 is inserted through and supported by opposing side plates 39a. The winding shaft 40 has a tool engaging portion 4 at one end.
0a is formed, a threaded portion 40b is formed at the other end, and an insertion hole 41 for the vertical cutting steel wire 15 is provided in the middle of both ends so as to be perpendicular to the axis of the winding shaft 40. There is. A cutout groove 42 is provided on the outer circumferential surface of the winding shaft 40 from the periphery of the insertion hole 41 in the circumferential direction. The threaded portion 40b of the winding shaft 40 is attached to the side plate 3.
It is screwed into a nut 43 fixed to the outer surface of 9a,
Furthermore, a nut 44 for preventing rotation is screwed into the threaded portion 40b.

A narrow notch 45 into which the steel wire 15 is inserted is formed at the lower edge of the end plate 39b fixed to the side plate 39a of the bracket 39. The steel wire 15 is inserted into the insertion hole 41, and a stopper 46 is fixed to the end of the steel wire 15 to prevent it from coming off.

In order to cut the plastic material W using the cutting device 11, first, before carrying in the cutting cart 10 on which the plastic material W is placed, the elevating frame 13 is raised, and the carriage 16 is moved to one end (first end) of the elevating frame 13. (in Figure 4, the right end). Next, the cutting cart 10 carrying the plastic material W is carried into the machine frame 12, and then the elevating frame 13 is lowered and stopped at a predetermined position. Subsequently, by moving the protectors 28 at both ends of the lifting frame 13 forward toward the plastic material W, both protectors 28
are brought into close contact with the left and right end surfaces of the plastic material W, respectively.

When the drive device 47 of the carriage 16 is operated in this state, both carriages 16 move in the direction of arrow Q in FIG. 4, and the steel wire 14 stretched between both carriages 16 also moves in the same direction. 14 cuts into the plastic material W. As the steel wire 14 moves in the same direction, the plastic material W is cut at a predetermined height from its upper part. When the cutting of the plastic material W is completed and the steel wire 14 comes out from the left end surface of the plastic material W, the steel wire 14 fits into the narrow grooves 30 of both protectors 28. At the same time, the drive device 47 stops operating, and both carriages 16 stop.

After that, both protectors 28 are moved back and the plastic material W is removed.
When the lifting frame 13 separates from both end faces of the lifting frame 13, the lifting frame 13 starts to descend. When the lifting frame 13 starts to descend, the plurality of steel wires 15 stretched between the plurality of opposing pairs of brackets 39 are cut into the upper part of the cut plastic material W cut from the plastic material W by the steel wires 14. It will be done. and,
As the elevating frame 13 descends, the cut plastic material W is cut in the vertical direction.

The elevating frame 13 stops when it finishes descending by a predetermined value (the height at which all of the cut plastic material W cut by the steel wire 14 is cut). With this stop, both protectors 28 move forward again and come into contact with the upper end surface of the uncut plastic material W, supporting the plastic material W from both sides. Following this, the drive device 47 is activated,
Since both carriages 16 located on the left end side are moved in the direction of arrow Q' in FIG. 4, the steel wire 14 horizontally cuts the plastic material W in the backward stroke. Then, when the carriage 16 stops at the right end side of the lifting frame 13,
Both protectors 28 are retracted. This protector 2
8 retreats, the elevator frame 13 descends again,
The cut plastic material W is vertically cut by the steel wire 14 .

By repeating horizontal cutting and vertical cutting of the plastic material W in the above manner,
The plastic material W is cut into a number of plates having predetermined lengths and thicknesses. When the steel wire 15 for vertical cutting reaches the bottom of the plastic material W and the vertical cutting of the plastic material W is completed, the elevating frame 13 begins to rise. During this upward movement, each steel wire 15 passes through the cut portion of the plastic material W, and when it rises to a predetermined position above the plastic material W, the elevating frame 13 stops.

Thereafter, the cutting cart 10 on which a large number of plate-shaped cut products of the plastic material W are placed is carried out from the cutting device 11 by self-propelled or towed, and is transported to a steam curing chamber.

(Effects of the Invention) In the present invention, the bottom surface of the formwork is provided on the cart, and the side plates of the formwork around the four sides are integrally formed, and the side plates become narrower toward the top. A truncated quadrangular pyramid shaped plastic material is molded using a formwork with a trapezoidal cross-section that has a wider area at the bottom than at the top, and the integrated side plate of the formwork is pulled upward. Since the mold is removed from the mold, there is no need to disassemble the four side panels of the mold into individual side panels or assemble them as required in the conventional method. Therefore, the steps of assembling and disassembling the side plates of the formwork are omitted, which greatly contributes to improving productivity and reducing manufacturing costs. Furthermore, since the bottom of the form is provided on a trolley, it is convenient to move the plastic material to a demolding device or the like while it is placed on the bottom of the form, and there is no risk of damaging the plastic material during movement.

Further, a horizontal cutting means having at least one steel wire and moving in the horizontal direction and a vertical cutting means having a plurality of steel wires fixed in parallel to each other are mounted on the same frame. By operating the horizontal cutting means for each relative vertical movement of the plastic material, the plastic material is cut in both the horizontal and vertical directions almost simultaneously. Even if the cut plastic material above falls vertically due to the height of the plastic material cut by the wire,
Since the plastic material is cut vertically with a predetermined width,
Since the plastic material that has already been cut is not damaged, and the plastic material at the bottom that has not been horizontally cut is not vertically cut all the way down, no trouble occurs during horizontal cutting of the plastic material. As described above, according to the present invention, the plastic material can be cut in both the horizontal and vertical directions almost simultaneously, resulting in good cutting efficiency.

[Brief explanation of drawings]

FIG. 1 is a side view of the equipment used to carry out the present invention, FIG. 2 is a plan view of FIG. 1, FIG. 3 is a view taken along the line X--X in FIG. The figures show a specific example of the cutting device shown in Fig. 1, Fig. 4 is an enlarged front sectional view thereof, Fig. 5 is an enlarged plan view of Fig. 4, and Fig. 6 is the horizontal cutting steel wire shown in Fig. 5. 7 is a front view of the winding shaft shown in FIG. 6, FIG. 8 is an enlarged view of the end of the steel wire shown in FIG. 6, and FIG. 9 is a vertical cutting diagram shown in FIG. 5. Enlarged sectional view of steel wire winding shaft, No. 10
The figure is a sectional view taken along a plane including the axis of the winding shaft in FIG. 9, and FIG. 11 is an enlarged view of the main part of FIG. 10. DESCRIPTION OF SYMBOLS 1... Formwork, 2... Side plate, 3... Formwork cart, 10... Cutting cart, 11... Cutting device, 12... Machine frame, 14... Steel wire for horizontal cutting, 15... Steel wire for vertical cutting, W... Plastic material .

Claims (1)

[Claims] 1 The bottom of the formwork is provided on the trolley, and the four side plates of the formwork are integrally formed, and the side plates become narrower upward, and the area surrounded by the side plates is larger than the top. A truncated quadrangular pyramid-shaped plastic material is molded using a trapezoidal cross-section mold with a wide bottom, and the mold is removed by lifting the integrated mold side plate upwards. A horizontal cutting means that moves horizontally with a large number of steel wires and a vertical cutting means that has a large number of steel wires fixed in parallel to each other are mounted on the same frame, and the frame is vertically relative to each other. A relative vertical movement of the frame is performed using a cutting device which is movable vertically, and in this state, a horizontal cutting means is moved horizontally, and then the relative vertical movement and horizontal cutting of the frame are performed. 1. A method for producing a plastic material, which comprises cutting the plastic material in the horizontal and vertical directions by repeating horizontal movement of a means to obtain a cut plastic material.