JPS63247250A - Method and device for processing winding end of thermoplastic resin sheet - Google Patents

Abstract

PURPOSE:To ensure locking of a winding end by melting and securing together the winding end and a layer subsequent to that of the winding end, by a method wherein a sheet winding end portion is pressed by a press plate, a plurality of heater needles are inserted down to depth being at least one layer or more of the winding end for heating. CONSTITUTION:A thermoplastic resin sheet conveyed on a conveyer 3 is wound on an arm 16 around a winding core 12 being vertically rockable. Upon completion of winding, a heater mechanism 21 is lowered, and a press plate 25 mounted to a heater mechanism 21 is brought into contact with a wound sheet 2A. When a winding end 2B is perceived by a sensor 44, the wound sheet 2A is stopped, and the winding end 2B is situated to a home position. The wound sheet 2A is pressed by the press plate 25, a plurality of heater needles 23 are lowered from a heat feed device 22 of a heater mechanism 21 through insertion holes of the press plate 25, and are pressed down to a subsequent layer through a layer in the vicinity of the winding end 28. After heating, the heater needles 23 are pulled off, and the press plate 25 is then raised. Thus, the winding end and the subsequent layer are thermally dissolved for securing.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method and apparatus for treating ends of a thermoplastic resin sheet.

(Prior art) For filtration to capture solid particles from a mixture of liquid and solid particles, a cylindrical filter made of porous material is generally used, and by passing the solid-liquid mixture through the peripheral wall of this filter, only the liquid is allowed to pass through the filter, and solid particles are captured on the peripheral surface of the filter.

Traditionally, the manufacturing of cartridge-type filters as described above was
(a) A method in which fiber thread is wound around a permeable core (commonly known as a wound cartridge filter); (b) A method in which the permeable core is formed using various fabrics, non-woven fabrics, sponges, filter paper woven into pleats, or porous (C) sintering of metallic or inorganic materials, and integral molding of porous materials such as sponge felt.

However, the wound type cartridge filter of (8) has a drawback in that the axial size of the cartridge filter is unsuitable for high-mix, small-lot production. In other words, in the radial direction of the cylinder, even if the filter diameter can be changed by reducing the number of turns or changing the type of fibers to be wound, it is possible to change the filter diameter by reducing the number of turns or changing the type of fibers wound. Therefore, cutting to shorten the filter length is impossible, and if the setting of the winding device is to be changed to obtain the desired filter length, the traverse cam must be changed. Therefore, it is necessary to change the traverse cam for each lot or to design and manufacture a new traverse cam for a new size, which leads to an increase in costs in manufacturing a wide variety of small lots.

Further, in the cartridge filter manufactured by the method according to (b) above, in addition to filter media such as various cloths and nonwoven fabrics, a permeable core that holds these filter media is required to maintain the shape of the cartridge filter. This permeable core provides effective strength against fluid pressure differences during filtration, the core itself is filterable, and the filter media wound around this core is in contact with the non-permeable part of the core, and the contact part The filter medium has a wood defect that prevents it from functioning as a filter medium. This results in disadvantages such as pressure loss or increase in the filter medium and a decrease in the life of the filter medium when the filter is used.

Furthermore, in the cartridge filter obtained by the method (c) above, a new mold must always be made in order to obtain the desired filter dimensions. Recently, the dimensions of cartridge filters have tended to be diversified depending on the purpose, and mini-size (usually 100 mm or less in length and 40 m in outer diameter)
Considering that cartridge filters with a diameter of less than mφ are required, we are forced to respond to high-mix, small-lot production, and if we have to create filter molds for each type, this will increase manufacturing costs. This will lead to a rise in prices. Further, in the case of the above-mentioned mini-sized cartridge filter, although manufacturing the mini-sized mold itself is not difficult, it is difficult to take out or remove the filter from the mold after molding.

Therefore, in order to eliminate the various drawbacks of the conventional filters mentioned above, the present applicant created a cartridge filter by winding porous sheets into a hollow cylindrical shape and stacking them, and created a cartridge filter that improves the filtration effect while creating a permeable core and molding material. Developed a cartridge filter that does not require a mold (Japanese Patent Application Laid-Open No. 61-1571)
(See Publication No. 2).

(Problem to be solved by the invention) However, when a thermoplastic resin sheet is wound to form a hollow cylindrical cartridge filter as described above,
It is necessary to fix the rolled end to give it shape retention.
The conventional method of fixing the end of the winding is by heat-sealing the plastic films together using a heater, but since the shape of the heater is flat and heat conduction is mainly in the plane direction, Even if a plastic film such as 100% plastic film can sufficiently achieve the purpose of adhesion, it is not only difficult to wind a thick resin sheet and heat-seal the ends of the film, but it is also difficult to wrap a thick resin sheet around the core. When winding, it is not easy to position the end of the winding. In addition, the method of winding a filamentous material around the outer periphery of a cylindrical resin sheet and fixing it at the end of the sheet takes time to wind the filamentous material, making it difficult to increase productivity. There were various problems such as.

The present invention provides a method for treating the ends of a thermoplastic resin sheet, which can securely fix the ends of even thick resin sheets, and a processing device that can be used directly to carry out this method. It was done for the purpose of

(Means for Solving the Problems) In order to solve the problems of the prior art described above, the present invention provides a method for winding a thermoplastic resin sheet in multiple layers around a winding core and treating the end portion of the sheet. The winding end of the formed sheet is set in a fixed position, and the winding end is held down in the axial direction by a winding end presser plate, and then the required number of heater hooks are passed through the winding end presser plate and are applied to at least one layer of the sheet winding end. By inserting the sheet over a depth above, the sheet is heated locally to soften or melt it, and when the heater needle is removed, the part is cooled and solidified, and is bonded to the next layer, such as the winding ends of sheets 1 to 1, to form a winding. The rolled end of the sheet is fixed. In addition, as a device for realizing the above method, in a winding device that winds thermoplastic resin sheets in multiple layers around a winding core using a friction drive method, a y-y drop is applied to the end portion of the wound roll-shaped sheet. A freely supported heater mechanism is provided. A lifting support mechanism that supports the lifting and lowering of the
The present invention proposes a winding edge processing device for a thermoplastic resin sheet, which includes a sheet holding plate that is supported by the heat supply device so as to be movable up and down, elastically presses the winding end of the wound sheet, and has a hole through which the heater hook is inserted. .

(Function) Based on the above structure, a thermoplastic resin sheet is placed on the con hair belt, and the con hair belt is driven to wind it around the winding core to form a roll, form a predetermined wound sheet, and then wind it. The end presser plate is lowered to hold down the end of the wound sheet, and then the heater needle is lowered and inserted into the end of the winding to reach the next layer, thereby softening or thermally melting the upper and lower layers. When the heater needle is pulled out, this part is cooled and fixed by the heater needle, and the end of the wound sheet is fixed.

(Embodiments) Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 shows the external appearance of the main part of the device for carrying out this invention, FIG. 2 shows the same side view, and FIGS. 4(A) to (E)
shows the operating status.

The sheet winding mechanism 1 has a conveyor heald 3 on which a thermoplastic resin sheet 2 is placed and fed, and a pulley 6 on the shaft 5 of the drive roll 4 at the end of the conveyor belt 3 and a speed reduction mechanism 8 on the motor 7. A heddle 11 is applied to the pulley 10 on the output ll1ll19 of the belt 11, so that the conhair belt 3 is driven in the direction of the arrow in FIG.

On the other hand, a core support mechanism 13 for supporting the core 12 is provided on the end side of the conveyor belt 3. In this core support mechanism 13, a shaft 15 is rotatably supported between bearings 14, 14 fixed at positions corresponding to the width interval of the conveyor belt 3, and the bases of left and right support arms 16, 16 are fixed to this shaft 15. The winding core 12 is supported between the tips of these support arms 16.16, and the support arms 16.16 are able to pivot freely in the vertical direction around the shaft 1-15. When the arm 16.16 is lowered, the winding core 12 is positioned almost directly above the drive roll 4.

An air cylinder 17 is used as a driving source for vertically pivoting the support arm 16.16. The base of this air cylinder 17 is pivotally supported by the fixed part old 18, and is connected to the tip of the piston rod 19 or the small arm 20 at the base of the support arm 16, and the support arm 16. The shaft 15 is rotated upwardly around the shaft 15.

The heater mechanism 21 includes a heat supply device 22 having a built-in heating source, and a plurality of heater needles 23.2 vertically disposed below the heat supply device 22 at predetermined intervals in the longitudinal direction of the winding core 12.
3... and an elevating and lowering support mechanism 24 that raises and lowers this heat supply device 22, and this heat supply device 22 is attached with a winding end presser plate 25 that presses the winding @2B on the winding sheet 2. There is.

In the illustrated embodiment, the lift support mechanism 24 uses a link mechanism. That is, two wooden links 28 and 29 are pivotally supported by shafts 30 and 31 on the support member 27 suspended from the fixed member 26, and the heat supply device 22 is pivotally supported at the tips of these links 28 and 29 by shafts 32 and 33. It is a parallel link mechanism, and can be moved up and down between the position shown by the chain line in FIG. 2 and the position shown by the solid line. As a driving source for this lifting support mechanism 24, the tip of a piston rod 35 of an air cylinder 34 is connected to the rear end of one link 28, and the heat supply device 22 is moved upward by the extension of this piston rod 35, and the same is shortened. It is designed to be lowered from time to time.

In FIG. 2, reference numeral 36 denotes a stopper that defines the lowering limit of the heat supply device 22, and the lowering amount of the heat supply device 22 is such that the heater needles 23 and 23 touch the winding end 2B of the wound sheet 2A and the next layer of the sheet. The stroke is set to just push in to a depth of . Although details are not shown, the stopper 36 can be vertically adjusted by operating a handle 37 shown in FIG. The lowering limit can be set arbitrarily.

Reference numeral 38 is a position detection sensor. Note that the lifting support mechanism 24 is not limited to the link mechanism described above,
Other means may also be used.

The winding end pressing plate 25 is formed of a plate-like material having a length corresponding to the width of the winding sheet 2 and an arcuate cross-sectional shape that almost matches the arc surface of the outer peripheral surface of the winding sheet 2. In the center in the longitudinal direction, there is a hole 39 through which the heater needle 23, 23 can be inserted.
is provided, and the lower ends of a plurality of temporary presser supports 40, 40, . . . are fixed to one side end of the winding end presser plate 25.

These columns 40, 40... are inserted into bearings 41, 41... provided on the side surfaces of the heat supply device 22, and horizontal bars 42 are fixed to the upper ends of these columns 40, 40... The temporary presser supports 40, 40, . . . are simultaneously supported so as to be slidable in the vertical direction. These temporary supports 40.4
The bases of plate-shaped springs 43, 43... are fixed to the heat supply device 22 at a position corresponding to the upper end of 0..., and when the temporary presser support columns 40, 40... rise, The winding end pressing plate 25 is pressed against the winding sheet 28 by applying a bias to the winding sheet 28.

Further, a sensor 44 is provided at the lower end of the temporary presser support 40 to detect the position of the winding end 2B of the winding sheet 2A, and detects the winding end position of the winding sheet 2A and stops the sheet winding operation. It is now possible to get a signal to do so.

The material of the thermoplastic resin sheet 2 used here includes, for example, a porosity of 65 to 95* and a degree of acetalization of 70 to 9.
0*, a thickness of 0.5 to 10 mm, and a polyvinyl acetal porous sheet having a different pore diameter for each sheet or sheets is used. Further, as the winding core 12, a water-soluble phenol resin, melamine resin, or urea resin having a resin solid content of 15 to 8096 is used.

FIG. 3 shows an embodiment in which the above-mentioned device is combined with a core automatic supply device 45, in which cores 12 are intermittently supplied one by one to the lower part of a hopper 46 that stores a large number of cores 12. A supply port 47 is provided, and a core delivery rotating body 48 is provided opposite the supply port 47. This core sending rotary body 48 has a plurality of core receiving grooves 49, 49... on the circumferential surface, one core 12 is received in this core receiving groove 49, and the core is sent out. By rotating the rotating body 48 in the direction of the arrow, the core 12 is released from the core receiver groove 49 and the sheet winding mechanism 1
The winding core support mechanism 13 of

Reference numeral 50 in the figure is a presser member that presses the winding start end of the sheet 2;
Reference numeral 51 indicates a gripping tool, and reference numeral 52 indicates a chute for receiving the finished product of the rolled sheet 2A.

Next, the operation of the above embodiment will be explained.

While the core support mechanism 13 supports the core 12, the sheet 2 is placed on the conveyor belt 3, the heat supply device 22 of the heater mechanism 21 is placed in the raised position, and the motor is started to move the drive roll 4 in the direction of the arrow. drive. This allows sheet 2
The tip of the winding core 12 is wound onto the winding core 12 (Fig. 4 (8)).
.

When the winding is completed, the air cylinder 34 of the lifting support mechanism 24 of the heater mechanism 21 is shortened and the heat supply device 22
lower. This lowering of the heat supply device 22 causes the winding end presser plate 25 to touch the outer periphery of the winding seam (see FIG. 4 (B)).
)) As the winding sheet 2Δ rotates, the winding end 2B is detected by the sensor 44 and the operation of the winding mechanism 1 is stopped. As the heat supply device 22 descends roughly, the horizontal bars 42 at the upper ends of the branches 40, 110... of the winding end pressing plate 25 come into contact with the springs 43, 43, and push them up, and the reaction force causes the winding ends to The holding plate 25 is the winding end 2B of the winding seam h2A.
(Pre-stage condition leading to Figure 1 (C))
.

Furthermore, by lowering the heat supply device 22, the heater needles 23, 23... are inserted into the winding end 2B, and the winding end 2B
It penetrates to the next layer and hits either the heat supply device 22 or the stopper 36, and its descent is stopped. As a result, the sheet is melted by the heat of the heater needles 23, 23..., and the winding end 2B
and the next layer are fused (Fig. 4(C)).

Then, if the air cylinder 34 of the lifting support mechanism 24 is extended and the heat supply device 22 is raised, the heater needle 23.2
3... is the winding sheet 2 stations)) (Figure 4 (D))
. However, until the heater needles 23, 23... are pulled out, the winding end pressing plate 25 is holding down the wound sheet 2Δ as shown in FIG. 4(D), and the heater needles 23, 23... - This prevents the winding end 2B from being pulled together with the winding end 2B when it is pulled out.

When the heat supply device 22 further rises and returns, the winding end presser plate 2
5 is also 1111 removed from the winding sheet 2A, during which time the heat-sealed joints are cooled by the heater needles 23, 23, and become fixed (Fig. 4 (E)), returning to the state before starting. It will be done. In addition, on the wood layer side, in the process shown in FIG. 4(D), the winding end press plate 25 holds down the winding sheet 28 by its own weight, but in the case of a resin sheet with a strong winding reaction force, ( E) The winding end pressing plate 25 may be biased by an adjustable spring until the process is completed.

When used in combination with the automatic winding core supply device 45 shown in FIG. 3, everything from supplying the winding core 12 to collecting the wound sheet product can be carried out automatically.

(Effects of the Invention) As explained above, according to the present invention, a cartridge filter is formed by winding a thermoplastic resin sheet and then molded without requiring a permeable core and a mold. Since the edges and ends of the roll are partially fused by inserting a heater needle, even thick sheets can be reliably heat fused. When inserting and removing the heater 61, the winding end is held down by the winding end pressing plate.
There is no slack in the winding seam 1, and when the heater needle is removed, there is no curling up of the end of the winding, and the end of the winding can be securely fastened, and the end of the winding can be fastened with high efficiency. Therefore, it is possible to provide high productivity and low cost, and it is possible to select the width of the sheet, the thickness of the sheet,
By selecting the winding core, the axial length and thickness of the cartridge filter can be arbitrarily selected, and the cost does not increase even if the number of lots is small. Furthermore, the thickness of the thermoplastic resin sheet and the bonding condition based on it can be easily adjusted by appropriately selecting the heater needle shape, heater temperature, fusion time, heater needle pressure, etc. Various effects can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the main parts showing one embodiment of the device for carrying out the present invention, Fig. 2 is a side view of the main parts, and Fig. 3 is a schematic view of the main parts when combined with an automatic core feeder. Side view, Figure 4 (
8) to (E) are operation explanatory diagrams of the embodiment of FIG. 1. DESCRIPTION OF SYMBOLS 1... Seal winding mechanism, 2... Thermoplastic resin sheet, 3... Conhair heald, 4... Drive roll, 7
...Motor, 12... Winding core, 13... Winding core support mechanism, 15... Shaft, 16... Support arm, 21
Heater pore, 22... Heat supply device, 23... Heater needle, 24... Lifting support mechanism, 25... Winding end presser plate,
40...temporary presser support, 43...spring.

Claims (2)

[Claims] (1) In a method of winding a thermoplastic resin sheet in multiple layers around a core and treating the end of the sheet, the position of the end of the wound sheet is set at a fixed position, and the end of the winding is oriented in the axial direction. The sheet is held down by a presser plate, and then the required number of heater needles are inserted through the end presser plate to a depth of at least one layer of the sheet winding end to locally heat the sheet, soften or melt it, and heat the sheet. A method for treating ends of a thermoplastic resin sheet, characterized in that by removing the needles, the portions are cooled and fixed, thereby bonding the end of the sheet to the next layer and fixing the end of the wound sheet. (2) In a winding device that winds a thermoplastic resin sheet in multiple layers around a winding core using a friction drive method, a heater mechanism is provided that is supported so as to be able to rise and fall at the end of the wound roll-shaped sheet; This heater mechanism supports a heat supply device, a plurality of heater needles vertically installed below the heat supply device at required intervals, and a lower limit of the heat supply device that can be freely adjusted in a vertically adjustable manner. and a sheet holding plate that is supported by the heat supply device so as to be movable up and down, elastically presses the winding end of the wound sheet, and has a hole through which the heater needle is inserted. End-processing device for plastic resin sheets.