JPH035303B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a method for manufacturing a rubber screen mainly used for sieving ore, coke, crushed stone, etc.
In particular, the present invention relates to a method of manufacturing a rubber screen made of a reticular elastic body that has good abrasion resistance, good sieving efficiency, and can significantly reduce impact noise.

(Prior Art) Conventionally, as a method for manufacturing this type of rubber screen made of a reticular elastic body, an apparatus as shown in FIGS. 8 and 9 has been used. As is clear from the figure, this device includes an alignment plate 24 having a large number of parallel grooves, and a presser roller 23 serving as a groove for holding the transverse resin rope 22, which is moved by a screw 30 while rotating on the alignment plate. , the presser roller 2
The thermoplastic resin rope 21 in the vertical direction is arranged on the alignment plate 24 of the frame 25, and the thermoplastic resin rope 22 in the horizontal direction is arranged on the presser roller 23. A configuration in which both ropes are held in alignment and crossed under pressure, and hot air or gas flame is blown from a hot air blowing nozzle 28 toward this crossing point to heat and melt the ropes while moving a press roller to join them under pressure. When manufacturing a screen, the vertical resin ropes 21 are fitted into grooves provided on the alignment plate 24 and held, while the horizontal resin ropes 22 are held in the grooves provided on the holding roller 23. Then, the presser roller 2 is held by the air cylinder 26.
3 to the pressing position adjusted with the adjustment screw 27 and press it, and while blowing hot air from the hot air blowing nozzle 28 to heat and melt the adhesion sides of the vertical and horizontal resin ropes 21 and 22, attach the mounting frame 29 with the feed screw 30.
move. Then, the presser roller 23 sequentially moves in the direction of the arrow A in the figure to pressurize and join the molten parts, and the joining operation ends at the end, that is, the left end in FIG. Next, the transverse resin rope 22 is cut, the presser roller 23 is moved upward by the air cylinder 26, and the feed screw 30 is reversed and returned to the starting point, that is, the right end position in FIG. Meanwhile, the longitudinal resin rope 21 is fed by a certain amount in the direction shown in FIG. 9B by an appropriate drawing device (not shown), stops, and completes the process, and thereafter the above-described process is repeated. I was getting a screen.

However, the following drawbacks were found in the above method. In other words, (1) As the number of ropes increases, the number of preparation steps increases;
There is a problem with the production ratio.

(2) Since a large number of wires are welded at the same time, the welding force varies greatly, which poses a quality problem.

(3) When the rope becomes thinner, for example less than 2.0mmφ, the leveling of the plate, hot air temperature conditions,
It becomes difficult to adjust the speed, increasing the burden on the worker, and causing problems in workability.

Things like that. And these drawbacks are usually
This is noticeable when the wire diameter is small, and there are restrictions on the implementation of the manufacturing method.

(Problems to be Solved by the Invention) The present invention deals with the above-mentioned actual situation, improves the drawbacks of the conventional method, and is a means for manufacturing a rubber screen that can be easily applied even when a thin wire diameter rope is used as a constituent material. The problem is to be solved by using a cylindrical drum and wrapping an elastic rope around the outer peripheral surface of the cylindrical drum.

(Means for Solving the Problems) That is, the present invention, which solves the above problems and achieves the objects, is characterized by the following process operations.

(b) One end of a rope with various cross-sectional shapes whose main component is an elastic substance such as polyurethane or rubber is locked to the side of the drum, and the rope is spirally wound around the outer circumferential surface of the drum at a constant pitch while the drum is rotating. , after locking the other end of the rope to the opposite side of the drum at the end of the winding, at least one
Ropes for locking books may be arranged at predetermined intervals in the axial direction of the drum on the rope wrapped around the outer circumferential surface of the drum and welded to the rope wrapped around the outer circumferential surface of the drum, or conversely, ropes for locking books may be placed in advance on the drum axis. At least two locking ropes are placed on the line at a predetermined interval, and then one end of the rope, which has an arbitrary cross-sectional shape and whose main component is an elastic material such as polyurethane or rubber, is locked to the side of the drum. Then, while rotating the drum, the rope is spirally wound around the outer peripheral surface of the drum at a constant pitch, and at the end of the winding, the other end of the rope is locked to the opposite side of the drum.

(b) Cutting the rope wrapped around the outer peripheral surface of the drum in the drum axis direction between the locking ropes to form a rope sag.

(c) Utilizing a predetermined drum having grooves in the circumferential direction on both sides of the rope sagging molded body, fitting a locking rope into the grooves, turning the rope by 90 degrees, and wrapping the drum.

(d) While rotating the drum, welding another rope whose main constituent is the elastic material to the rope formed from the sag wound under the required tension, welding it into a spiral at a constant pitch over the rope formed from the sag wound around the drum. Wrapping to form a cylindrical rubber screen.

(E) Cutting the cylindrical rubber screen at an arbitrary position in the direction of the drum axis to obtain a rubber screen of a predetermined size.

It is.

Here, the rope used as a constituent material in the above-mentioned present invention is one whose main constituent is an elastic material such as rubber or polyurethane, and is a cored rope having a twisted wire cord such as synthetic fiber or metal wire in the core. This includes both non-core materials and non-core materials. Furthermore, it is important that the elastic material on the surface can be welded, and materials that are not suitable for welding are excluded.

The cylindrical drum around which the rope is wound may normally be of a fixed size, but in view of the fact that screens of any size can be manufactured freely, an expander-type drum is used and the rope is wound around it. It is also preferable to mold a rope sag molded article, and the present invention includes both of these.

(Example) Hereinafter, the manufacturing method of the present invention will be specifically described in detail with reference to the accompanying drawings.

1 to 6 show the method of the present invention in the order of steps. First, a cored or non-cored rubber rope 1 is attached to the side of a cylindrical drum 2 with one end as shown in FIG. 1B. Multiple pins P, P...
Then, the rubber rope stored in a bobbin (not shown) is passed through a guide roll (not shown) to a constant tension while rotating the drum 2 as shown in FIG. The rope 1 is wound around the outer peripheral surface of the drum 2 at a constant pitch, and at the end position, the other end of the rope 1 is wound and locked around a pin protruding from the opposite side surface of the drum 2 in the same manner as the start end.

In this case, although not shown, the guide roll sends the rope to the drum and gradually moves in the left-right direction as the drum rotates in order to maintain a constant pitch between the ropes as they are wound.

Note that the rope wound here is a rope in the flow direction of the sorted material in the screen, and is abbreviated as N rope.

Next, a second
As shown in the figure, two locking ropes 3 of about 5 mmφ are wound around the spiral N
N is placed on the rope 1 in a perpendicular direction, that is, in the direction of the drum axis, and is wound around the outer peripheral surface of the drum using a heating device (not shown) such as a heater using hot air.
It will be welded to the rope one after another.

In addition, in the above explanation, the rope is wound spirally and the locking rope is placed, but in this case, conversely, after placing the locking rope in advance, the rope is wound spirally and welded. The same is true even if

After welding, when the locking ropes are cut in the direction of the drum axis at the dotted line position in Figure 2 and expanded, a rubber rope sagging molded body 4 as shown in Figure 3 is obtained.

Next, the direction of this sagging molded body is changed by 90 degrees, and the N rope is wound around another drum 2' of a predetermined size, which has fitting grooves G in the circumferential direction on both sides, as shown in Fig. 4 (a) and (b). The locking rope 5 is fitted into the groove G of the molded drum 2 and wound. In this case, if the rope sag molded body 4 is shorter than the drum circumference, another rope sag molded body 4 for the shorter length is added and wrapped, and if it is longer than the drum, the longer length is cut to make the length equivalent to the drum circumference. Wrap it to match.

Next, as shown in FIG. 5, while rotating the drum 2, a rubber rope 1', that is, a transverse rope (hereinafter abbreviated as T rope) that intersects at right angles to the N rope in the flow direction of the sorted material, is attached. On the drum, the N rope 1 is welded to the N rope 1 under a certain tension by a guide roll (not shown) connected to a heater, and the N rope 1 is sequentially spirally arranged at a certain pitch. Wrap to form a cylindrical rubber screen.

Note that during welding, the pressing force of the T-rope 1' is required, but the pressing force is exerted by the tension when the T-rope is wound.

The thus obtained cylindrical rubber screen is then cut in the direction of the drum axis at an arbitrary position and expanded to obtain a rubber screen S of a predetermined size shown in FIG. 6.

In the above steps, if the drums 2, 2' used in the steps shown in FIGS. 1 and 4 are of a predetermined size, it is possible to prepare a plurality of drums of the required size to suit various sizes. By selecting the size, the screen size can be appropriately adjusted and manufactured.

However, another method suitable for adjusting the screen size is to use an expander-type drum that can be expanded or contracted.

FIG. 7 shows one of the drums 11 used in this method.
An example is shown in which a plurality of divided plates, four divided plates 11a, 11b, 11c, and 11d in the figure, are each
Arms 12, 13, 14, 15 that expand and contract in the radial direction
The size of the drum can be adjusted by extending and contracting the arms, and a screen of any size can be obtained.

In this case, the locking rope 16 is usually located on the upper surface of the dividing plate.

Note that the arm extension/contraction mechanism, drum rotation mechanism, etc. can be easily designed using known means.

Thus, by completing each of the steps described above, a rubber screen can be manufactured efficiently.

(Effects of the Invention) As described above, the present invention uses at least two drums, winds a rope spirally around one drum to form a molded body, and cuts the molded body as required.
The main purpose of this method is to unroll the drum, change its direction and wrap it around another drum, then wrap a rope in the other direction spirally in a direction orthogonal to the rope, and weld the joints together, which is different from the conventional method. Compared to other manufacturing methods, it has various superior effects as described below.

(1) The manufacturing method is generally simple, the number of man-hours is significantly reduced compared to conventional methods, and production capacity is significantly improved. The cost is less than half, and the production capacity is more than quadrupled.

(2) The welding of the ropes becomes uniform, resulting in improved quality and a good appearance. To explain this in more detail: (a) In the conventional method, 4 to 5 bobbins are used on the T side and 20 bobbins on the N side.
~30 bobbins are used, but due to variations in the diameter of the extruded rope itself, variations in melt viscosity occur when multiple rows of diameter ropes and weft ropes are lined up and welded at the same time, but with the method of the present invention, T rope and N rope Because the rope is molded into one or two to three ropes, variations in rope diameter and melting temperature are much smaller than in the past.

(b) In the method of the present invention, since the rope is crimped using the tension that wraps it around, the pressing force is constant and uniform welding can be achieved.

(c) Moreover, unlike the conventional method, the rope is not pressed from the outside with rolls, so the rope is less deformed and the appearance is better.

3 Conventionally, it was only possible to weld up to about 1.6 mmφ, but by using the method of the present invention, it is possible to weld even small ropes such as 1.0 mmφ or 1.2 mmφ, which is much thinner than before. Can be molded into lobes.

[Brief explanation of the drawing]

Figure 1 A, B, Figure 2, Figure 3, Figure 4 A,
B, FIG. 5, and FIG. 6 are process explanatory diagrams showing each step of the manufacturing method of the present invention in order. 7th
The figure shows another example of the drum used in the method of the present invention.
FIGS. 8 and 9 are a front view and a side view schematically showing the apparatus used in the conventional method. 1, 1'... Rope, 2, 2', 11... Drum, 3, 5, 16... Locking rope, 4... Rope sagging molded body, 11a, 11b, 11c, 11d
...Divided plate, 12-15...Arm, P...Pin, S...Rubber screen, G...Groove.

Claims (1)

[Scope of Claims] 1. A method for manufacturing a rubber screen, characterized in that the following steps (a) to (e) are performed in the order listed. (b) One end of a rope with various cross-sectional shapes whose main component is an elastic substance such as polyurethane or rubber is locked to the side of the drum, and the rope is spirally wound around the outer circumferential surface of the drum at a constant pitch while the drum is rotating. , after locking the other end of the rope to the opposite side of the drum at the end of the winding, at least two
Ropes for locking books may be arranged at predetermined intervals in the axial direction of the drum on the rope wrapped around the outer circumferential surface of the drum and welded to the rope wrapped around the outer circumferential surface of the drum, or conversely, ropes for locking books may be placed in advance on the drum axis. At least two locking ropes are placed on the line at a predetermined interval, and then one end of the rope, which has an arbitrary cross-sectional shape and whose main component is an elastic material such as polyurethane or rubber, is locked to the side of the drum. (b) Wrapping the rope spirally around the outer circumferential surface of the drum at a constant pitch while rotating the drum, and locking the other end of the rope to the opposite side of the drum at the end of the winding; Cutting the wound rope in the drum axis direction between the locking ropes to form a rope sag; (c) Cutting the rope sag formed into the rope sag using a drum having grooves in the circumferential direction on both sides; Fitting a locking rope to the rope, changing the direction by 90 degrees, and wrapping it around the rope; (d) While rotating the drum, attaching another of the elastic substances as a main component onto the rope sagging molded body wound around the drum. (e) cutting the cylindrical rubber screen at an arbitrary position in the direction of the drum axis by spirally winding the rope at a constant pitch while welding the rope to the sagging molded rope under a required tension; 2. The method for manufacturing a rubber screen according to claim 1, wherein the drum around which the rope mainly composed of an elastic substance is wound is a drum of a certain size. 3. The method of manufacturing a rubber screen according to claim 1, wherein the drum around which the rope mainly composed of an elastic substance is wound is an expander-type drum that can be expanded and contracted.