JPS6138669A - Manufacture of rubber screen - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a method for manufacturing a rubber screen mainly used to screen ores, coke, crushed stone, etc. The present invention also relates to a method of manufacturing a rubber screen made of a reticular elastic material, which 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 consists of an alignment plate (24) having a large number of parallel grooves, and a transverse resin rope (24) that moves along the screw retaining groove while rotating on the alignment plate. It is equipped with a presser roller (c) that acts as a hot air blower and a hot air blowing nozzle (e) that moves together with the presser roller (c).
) on the frame stand (c) alignment plate c! 4) Place the horizontal thermoplastic resin ropes (23) on top of the presser roller and hold them in line, press the two ropes to intersect, and apply a hot air blowing nozzle (from two barrels) toward the intersection. By blowing hot air or gas flame, the above-mentioned ropes are heated and melted, and a presser roller is moved to join them under pressure.In the case of manufacturing a screen, the longitudinal resin ropes Cυ are arranged on an alignment plate. (Insert and hold the horizontal resin rope (22) into the groove provided on the top of the presser roller (c), then hold it in the groove provided on the presser roller (c), and then press it with the air cylinder (c) Move it to the pressing position adjusted with the adjustment screw and press it, then blow hot air from the hot air blowing nozzle (c) to both the vertical and horizontal resin ropes Cυ, (23) while heating and melting the adhesion sides of the feed screw (to). Yoshi mounting stand (c)
move. Then, the presser roller (c) sequentially moves in the direction of 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, cut the four horizontal resin ropes and air cylinder (
(to) moves the presser roller (c) upward to the starting point, that is, the right end position in FIG. 8, and then reverses the feed screw (to) and returns it. Meanwhile, the longitudinal resin rope eυ
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 then the above-mentioned process is repeated to obtain 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 production efficiency.

(2) Since a large number of pieces are welded at the same time, there is a large variation in welding strength, which poses a quality problem.

(3) When the rope becomes thinner, for example, when it becomes less than LO■φ, it becomes difficult to level the plate, adjust the hot air temperature conditions, and speed, which increases the burden on the worker and causes problems in workability.

Things like that. These drawbacks are usually 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 manufactures a rubber screen that can be easily applied even when a thin wire diameter rope is used as a constituent material. The object of the present invention is to provide a means for solving the problems of using a cylindrical drum and winding 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 of various cross-sectional shapes, the main component of which is an elastic substance such as polyurethane or rubber, is locked to the side of the drum, and while the drum is rotating, it is spirally wound around the outer circumferential surface of the loaf watram at a constant pitch. At the end, the other end of the rope must be secured to the opposite side of the drum.

(b) Arranging two locking ropes at a predetermined interval in the axial direction of the drum on the rope wrapped around the outer circumferential surface of the drum, and welding them to the rope wrapped around the outer circumferential surface of the drum.

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

B) Utilizing another drum of a predetermined size with grooves provided in the circumferential direction on both sides of the rope sagging molded body, fitting the locking rope into the groove and winding the rope by changing the direction by 90 degrees.

(E) While the drum is being rotated on the rope sag formed body wrapped around the drum, another rope whose main constituent is the elastic material is welded to the sag formed rope under the required tension and spirally formed at a constant pitch. The wrapping should form a cylindrical rubber screen.

(f) Cutting the cylindrical rubber screen at an arbitrary position in the drum axis direction 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 has a stranded wire hood made of synthetic fiber or metal wire in the core. This includes both cored and non-core materials that do not have a core material. It is also important that the elastic material on the surface can be welded, and those that are not suitable for welding are excluded.

The cylindrical drum around which the rope is wound is usually
Although screens of a fixed size may be used, it is also preferable to use an expander type drum metal from the viewpoint of freely manufacturing a screen of any size, and to form a rope sag molded body by winding the rope around this. It encompasses both.

(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 according to the process order. First, a cored or non-core rubber rope (1
) with one end attached to a cylindrical drum (
2) Multiple pins protruding from the side (P) (P)...
Wrap it in a zigzag pattern around ... and lock it, then wrap it around the bobbin (
The rubber lobes stored in the drum (2) are passed through the guide roll (not shown) to the drum (2) as shown in Figure 1 (A).
While rotating, wrap the rope (
1) Similarly to the starting end, the other end is wrapped and locked around a pin protruding from the opposite side of the drum (2).

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, two locking ropes (3 3
) is placed on the spirally wound N 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. Weld it with the attached N rope one by one.

After clearing, the ropes for locking are cut in the direction of the drum axis at the dotted line position in Figure 2 and expanded to obtain a rubber rope sagging molded body (4) as shown in Figure 8.

Next, this sagging molded body is turned 900 degrees, and fitting grooves (G
) with the groove (
()) and the locking rope (5) is fitted and wrapped around it. In this case, if the sudare molded body (4) is longer than the drum circumference, another sudare molded body for the shorter length is added and wrapped.
If it is longer than the drum, cut off the longer length and wrap it to match the drum circumference.

Then, as shown in Fig. 5, a rubber robe (r),
That is, a transverse rope (hereinafter abbreviated as T rope) crossing at right angles to the N rope in the flow direction of the sorted material is connected to the drum (2
) While rotating the drum completely, the N rope ( 1), weld the cylindrical rubber screen one after another in a spiral at a certain pitch,
Form.

Note that the pressing force of the T rope is required during welding, but the T
A pressing force is applied by the tension when the 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 as shown in FIG. 6.

In each of the above processes, the drums (2) used in the processes shown in Figs. 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 an example of a drum (11) used in this method, which has a plurality of divided plates, in the figure four divided plates (xz
a) (lub), (11e), and (iua) are provided at each end of the arms (b), α→, and b, which extend and contract in the radial direction, respectively, and the size of the drum is adjusted by extending and contracting the arms. This allows you to obtain a screen of any size.

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.

(Effect of the invention) As described above, the present invention uses at least two drums,
A rope is wrapped around one drum to form a molded body, which is then cut as required, unfolded, changed direction and wrapped around another drum, and a rope in the other direction is placed on top of it at right angles to the rope. The main purpose of this method is to wind it in a directional spiral and weld the joints together, and it has the following superior effects compared to conventional manufacturing methods.

(1) The manufacturing method is generally simple, and the number of man-hours is significantly reduced compared to conventional methods, and production capacity is significantly improved. Moreover, the production capacity will be 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, there are 4 to 5 bobbins on the T side and 20 to 5 bobbins on the N side.
80 bobbin is used, but due to variations in the diameter of the extruded rope itself, variations in melt viscosity occur when multiple rows of warp and weft lobes are lined up and welded at the same time. Because each rope is molded, variations in rope diameter and melt viscosity are much smaller than in the past.

(b) In the method of the present invention, since the rope is crimped using the tension of wrapping the rope, 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 improved.

8. Conventionally, it was possible to weld only up to about 16 m + 11 φ, but the method of the present invention uses winding around a drum. It is now possible to weld even small ropes such as Owφ and 1.2■φ, and it is possible to form ropes that are much thinner than before.

[Brief explanation of drawings]

Figure 1 (a) (b), Figure 2, Figure 8, Figure 4 (a) (
B), FIGS. 5 and 6 are process explanatory diagrams showing each step of the manufacturing method of the present invention in order. FIG. 7 is another embodiment of the drum used in the method of the present invention, and FIGS. 8 and 9 are front and side views schematically showing the apparatus used in the conventional method. (1) (1)...rope, (2) (2) (
11)...Drums. (3) (5) (16)...Locking rope. (4)... Rope sagging molded body. (11a) (llb) (11C) (11d)...dividing plate. (B) ~ (15)...Arm, CP)...Pin. (S)...Rubber screen, (G)...Groove. Rod 1 Nikka Z 4th voluntary procedural amendment () December 9, 1980 Director General of the Patent Office Manabu Shiga 2 Title of invention Method of manufacturing rubber screen 3 Relationship with the case of the person making the amendment Special Applicant address 4-1-21 Hamazoe-dori, Nagata-ku, Kobe Name (606) Mitsuboshi Belting Co., Ltd. 4, agent Kinzo Oda Residence 11+, 3-9-10 Minamisenba, Minami-ku, Osaka
``As shown'' on page 1, line 1 of the specification is changed to ``as shown''.
Correct as 0 12+ "Longer than circumference t/)" on page 10 of the specification tube, line 4
” is corrected to “shorter than the director.” +31 Change “16wφ” on page 13, line 16 of the specification cylinder to “
1゜6WIφ” and 0

Claims (1)

[Scope of Claims] 1. A method for manufacturing a rubber screen, characterized in that the following steps (a) to (f) are performed in that order. (b) One end of a rope of 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. , At the end of the winding, lock the other end of the rope to the opposite side of the drum. (b) Arranging two locking ropes at a predetermined distance in the axial direction of the drum on the rope wound around the outer circumferential surface of the drum, and welding them to the rope wound around the outer circumferential surface of the drum. (c) Cutting the rope wound around the outer peripheral surface of the drum in the drum axis direction between the locking ropes to form a rope sag. (d) Utilizing another drum of a predetermined size with grooves provided in the circumferential direction on both sides of the rope sagging molded body, fitting the locking rope into the grooves, changing the direction by 90 degrees, and winding the drum. (E) While the drum is being rotated on the rope sag formed body wrapped around the drum, another rope whose main constituent is the elastic material is welded to the sag formed rope under the required tension and spirally formed at a constant pitch. wrapping,
Forming a cylindrical rubber screen. (f) Cutting the cylindrical rubber screen at an arbitrary position in the drum axis direction to obtain a rubber screen of a predetermined size. 2. 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 a drum of a certain size. 3. 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 an expander-type drum that can be expanded and contracted.