JPH04355117A - Method of coating peripheral surface of tubular cloth with synthetic resin and its apparatus - Google Patents

Abstract

PURPOSE: To provide a method for covering a periphery of a tubular cloth for freely regulating a covering thickness with a synthetic resin by holding the thickness of the resin to the cloth constant. CONSTITUTION: A mandrel 6 is inserted from above into a resin coating chamber 8, an outer diameter specifying part is provided in the chamber 8, and an inner diameter specifying part is provided at the mandrel 6. A tubular cloth (a) is passed to an outer periphery of the cloth (a), a resin supplied from the chamber 8 is guided to either one surface of the inner and outer surfaces of the cloth (a) to cover the cloth (a) with the resin, and the cloth (a) is passed between the inner diameter specifying part and the outer diameter specifying part to cover at least one of the inner and outer surfaces of the cloth (a) with a synthetic resin in a predetermined thickness.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for coating the circumferential surface of a tubular fabric with a synthetic resin, and a processing apparatus suitable for carrying out this method.

0002

[Prior Art] As a method for coating the inner and outer circumferences of tubular fabric with resin, the tubular fabric is placed in a raw material tub filled with resin liquid, and after being pulled out from the bottom of the raw material tub, heat treatment and A method of performing cooling treatment or a method of performing only cooling treatment is known. However, it is necessary to keep the resin coating thickness on the tubular cloth constant, and it is also desired to freely adjust the coating thickness depending on the type of product. Furthermore, when only cooling treatment is performed, it is necessary to improve the bonding properties between the resin and the tubular cloth.

0003

SUMMARY OF THE INVENTION Therefore, the present invention makes it possible to maintain a constant coating thickness of the resin on the tubular cloth.
Another object of the present invention is to provide a method for coating the peripheral surface of a tubular cloth with a synthetic resin, the thickness of which can be freely adjusted. Another object of the present invention is to provide a processing device suitable for carrying out the above method.

0004

[Means for Solving the Problems] The present invention solves the above problems by the following method of coating the peripheral surface of a tubular cloth with a synthetic resin. The method of coating the peripheral surface of the tubular fabric of the present invention with a synthetic resin involves suspending and inserting the mandrel into the resin-coated portion from above, and forming an outer diameter that has an inner diameter that is approximately the same as the desired outer diameter of the resin-coated tubular fabric. A defining portion is provided on the resin coated portion, and an inner diameter defining portion having an outer diameter substantially the same as the intended inner diameter of the resin coated tubular fabric is provided on the mandrel. Then, the tubular fabric is passed around the outer periphery of the mandrel from above, and the resin supplied from the resin coating section is guided to at least one of the inner and outer surfaces of the tubular fabric, thereby coating the tubular fabric with resin. By passing the tubular cloth between the inner diameter defining part and the outer diameter defining part, at least one of the inner and outer surfaces of the tubular cloth is coated with a synthetic resin to a predetermined thickness. Further, the present invention solves the above-mentioned problems by using a device for coating the peripheral surface of a tubular cloth with a synthetic resin. The apparatus for coating the peripheral surface of a tubular cloth with a synthetic resin according to the present invention includes a mandrel through which the tubular cloth is passed around its outer periphery, and a resin coating chamber into which the mandrel is inserted while being suspended from above. This resin coating chamber includes a resin supply body that supplies resin into the interior thereof, an outer peripheral passage that guides the resin supplied to the resin coating chamber to the outer peripheral surface of the tubular cloth, and a peripheral passage that guides the resin supplied to the resin coating chamber to the outer peripheral surface of the tubular cloth. It includes an inner circumferential passage leading to the inner circumferential surface, and a thickness determining part that determines the thickness of the resin coated on the inner and outer surfaces of the tubular cloth in the resin coating chamber. This thickness determining part has an inner diameter defining part with an outer diameter that is approximately the same as the target inner diameter of the resin-coated tubular fabric, and an outer diameter defining part with an inner diameter that is approximately the same as the target outer diameter of the resin-coated tubular fabric. Equipped with The outer diameter defining part is provided below the outer circumferential passage and the inner circumferential passage of the resin coating chamber, the inner diameter defining part is provided on the mandrel, and the inner diameter defining part is located at a position corresponding to the outer diameter defining part. It is arranged. The present invention also provides a resin coating section, a pressure roller device disposed below the pressure roller device, a pull-out roller disposed below the pressure roller device, and the resin coating portion suspended from above within the pressure roller device. The crimping roller device and the pull-out roller rotate at the same feed speed, and the outer periphery of the tubular cloth passed from above around the periphery of the mandrel is coated with resin, and the crimping roller is To provide a device for coating the peripheral surface of a tubular cloth with a synthetic resin, characterized in that the peripheral surface of a tubular cloth is crimped and then pulled out by a pull-out roller. Further, in the present invention, the mandrel is suspended from above and inserted into the resin-coated part and the pressure roller device arranged below the mandrel, and the tubular cloth is passed around the outer periphery of the mandrel from above, so that the resin supplied from the resin-coated part is passed through the mandrel from above. The outer surface of the tubular fabric is covered with resin, and the resin-coated tubular fabric is crimped between the crimping roller and the mandrel, and the resin-coated tubular fabric is crimped at a speed equal to the feed speed of the crimping roller. To provide a method for coating the peripheral surface of a tubular cloth with a synthetic resin, which is characterized by pulling out the cloth. In the present invention, tubular fabric refers to any type of fiber or filament (e.g., polypropylene yarn, H.P.P.E yarn, polyester yarn, nylon yarn and other synthetic fiber yarns, cotton yarn and other natural yarns). Or a woven tubular cloth.

[0005]

In the invention as set forth in claims 1 and 2, the tubular cloth is defined by the mandrel and accurately descends into the resin coating chamber. During this descent, at least one of the inner and outer surfaces of the tubular cloth is coated with the resin supplied into the resin coating chamber. An inner diameter defining portion having an outer diameter substantially the same as the target inner diameter of the resin-coated tubular fabric is provided at the bottom of the resin-coating chamber, and an inner diameter defining portion having an inner diameter substantially the same as the target outer diameter of the resin-coated tubular fabric. Since the outer diameter regulating part is provided on the mandrel,
By passing the resin-coated tubular cloth between the inner diameter defining portion and the outer diameter defining portion, at least one of the inner and outer surfaces of the tubular cloth can be coated with the synthetic resin to a predetermined thickness. In the invention described in claims 3 and 4, since the resin-coated tubular cloth is crimped between the crimping roller and the mandrel, the pressure of the resin is determined by the distance between the two, and the resin is reliably formed into the tubular shape. Fixed on cloth. Furthermore, since the resin-coated tubular cloth is pulled out at a speed equal to the feeding speed of the pressure roller, the influence of friction on the tubular fabric during pressure bonding can be minimized.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram of an apparatus for coating the circumferential surface of a tubular cloth with resin, and first, an overview of the coating apparatus and coating method of the present invention will be explained based on this diagram. This device includes a first drum 11 around which a tubular cloth a, which is an object to be processed, is wound, a first guide roller 21 disposed above the first drum 11, and a first guide roller 21 disposed on the right side of the first guide roller 21 in the figure. The driven second guide roller 22, the suspension device 4 disposed below the second guide roller 22, the mandrel 6 suspended from the suspension device 4 via a suspension rod 5, and the mandrel 6 pass through. a heating device 7 disposed below the resin coating chamber 8 , a cooling device 10 disposed below the heating device 7 , and a lower drive roller 23 disposed below the cooling device 10 . , a third guide roller 24 arranged to the right of the lower drive roller 23 in the drawing, and a second drum 12 arranged to the right of the third guide roller 24 . The suspension device 4 includes a lower bearing 42 supported and fixed to the device body (not shown), and an upper bearing 41 supported by the lower bearing 42.
and a conical guide tube 3 mounted on an upper bearing 41. The suspension rod 5 has an upper bearing 4
Its upper end is fixed at the center of 1. A bottom portion 84 of the resin coating chamber 8 is supported and fixed to the main body of the apparatus (not shown), and a resin supply body 9 such as a screw pump or an extruder is connected to the side of the resin coating chamber 8. The tubular cloth a, which is the object to be processed, is wound around the first drum 11 in a crushed state, and is unwound from the first drum 11 in that state, and is connected to the first guide roller 21 and the drive type. The second guide roller 22 extends above the main part of the device. Next, the tubular cloth a to be treated is guided by the conical guide tube 3 mounted on the upper bearing 41 of the suspension device 4, and is expanded from the crushed state into its original tubular shape. The tubular cloth a spread out in a tubular shape passes between the bearing ball 43 of the upper bearing 41 and the bearing ball 44 of the lower bearing, and is connected to the mandrel 6 connected to the suspension rod 5 connected to the center of the upper bearing 41. Passed. While passing around the outer periphery of the mandrel 6 in the resin coating chamber 8, the tubular cloth a receives impregnation and coating of the resin supplied from the resin supply body 9 on its inner and outer surfaces. The tubular cloth whose inner and outer surfaces are impregnated and coated with resin supplied from the resin supply body 9 is heated by the heating device 7, and then the heated tubular cloth a is heated by the cooling device 1.
It is forcibly cooled by cooling water injected from zero. Note that it is also possible to perform natural cooling without using the cooling device 10. Finally, the cooled tubular cloth a is pulled out by the lower drive roller 23, guided by the third guide roller 24, and wound onto the second drum 12, thereby completing the entire process.

Next, a preferred embodiment of the suspension device 4 will be described in detail with reference to FIGS. 2 to 4. As described above, this suspension device 4 includes a lower bearing 42 supported and fixed to the device body (not shown), and a lower bearing 42 supported and fixed to the device body (not shown).
2 and an upper bearing 41 supported by the upper bearing 41. As shown in FIG. 4, the lower bearing 42 has a large number of bearing balls 44 arranged in a circumferential manner, and its inner circumferential surface 46 is a tapered surface whose inner diameter decreases as it goes downward. The entire lower bearing 42 is fixed to the device main body (not shown) with a flange 47. On the other hand, the upper bearing 41 has a large number of bearing balls 4 as shown in FIG.
3 are arranged in a circumferential manner, and the outer circumferential surface 45 thereof is a tapered surface whose outer diameter decreases as it goes downward. The suspension rod 5 vertically passes through the center of the upper bearing 41, and its upper end is fixed to the upper surface of the upper bearing 41 with a fixing nut 48. Furthermore, the above-mentioned guide tube 3 is attached to the upper end of this suspension rod 5. The upper bearing 41 is placed on the lower bearing 42 such that each bearing ball 43 is between each bearing ball 44 of the lower bearing 42. tubular cloth a
passes between the bearing ball 43 of the upper bearing 41 and the bearing ball 44 of the lower bearing 42 and heads toward the mandrel 6 attached to the lower end of the suspension rod 5. Therefore, in this suspension device, a shaft 6 is attached to the lower end of a suspension rod 5 connected to an upper bearing 41, and this upper bearing 41 is supported by a lower bearing 42 fixed to the device body (not shown). This enables reliable suspension of the mandrel 6 and at the same time realizes smooth feeding of the tubular cloth a.

Next, another preferred embodiment of the suspension device 4 will be described in detail with reference to FIGS. 5 to 7. This suspension device is designed to more smoothly feed a tubular cloth a having a relatively large diameter. That is, in the above example, the upper bearing 41 is strongly pulled downward. Examples of this downward force include the weight of the mandrel 6 attached via the suspension rod 5 and the downward force due to the resin coating process performed when passing through the mandrel 6. If this downward force becomes too large, it may become difficult to smoothly feed the tubular cloth a. This embodiment solves this problem. This suspension device, as described above, is connected to the device body (not shown).
A lower roller 52 is supported and fixed to the lower roller 52, and an upper roller 51 is supported by the lower roller 52. Lower roller 52
The four lower roller bodies 54 are arranged in a square as shown in FIG.
The first lower roller body 5
The shaft of No. 4 is rotated by a drive source 57 such as an electric motor through an appropriate connection means such as a belt or a pulley. On the other hand, the upper roller 51 has four upper roller bodies 53 arranged in a substantially square shape by a square frame 55, as shown in FIG. The suspension rod 5 is fixed to the center of a downwardly inclined frame 58 extending diagonally downward from the four corners of the square frame 55 with a fixing nut 59. Furthermore, an upwardly inclined frame 31 extends obliquely upward from the four corners of the square frame 55, and this serves the same function as the guide tube described above. This upper roller 51 is
Each upper roller main body 53 is placed on the lower roller 52 in a state corresponding to each lower roller main body 54. Then, the tubular cloth a passes between the upper roller main body 53 of the upper roller 51 and the lower roller main body 54 of the lower roller 43,
It heads toward the mandrel 6 attached to the lower end of the suspension rod 5. At this time, the four lower roller bodies 54 of the lower roller 52 are rotated by a drive source 57 such as an electric motor, so that the lower roller 52 can forcibly feed the tubular cloth a. Therefore, this suspension device is capable of smoothly feeding the tubular cloth a even when the upper roller 51 is strongly pulled downward.

Next, an embodiment of the mandrel 6 and the resin coating chamber 8 will be described based on FIGS. 8 to 16. First, the mandrel 6 is provided with a connection part 61 to the suspension rod 5 at the upper end,
A first positioning part 62 is located below the positioning part 62, and a second positioning part 62 is located further below the positioning part 62.
A positioning part 63 is provided, and an inner diameter defining part 64 is provided at the lower end. The first and second positioning parts 62 and 63 are disk-shaped and have an outer diameter substantially equal to the inner diameter of the tubular cloth a. An exhaust hole 65 is formed vertically through the first positioning portion 62 (FIG. 12). Further, as shown in FIG. 11, the second positioning portion 63 is formed with an inner circumferential passage 66 extending vertically through substantially the entire area thereof. In this embodiment, the inner circumferential passage 66 is formed as two semicircular holes, but a large number of small holes are formed over almost the entire area of the second positioning part 63, so that the resin can flow downward well as described later. If so, its shape can be changed as appropriate. As will be described later, the inner diameter defining portion 64 has a disc shape with an outer diameter that is approximately the same as the intended inner diameter of the resin-coated tubular cloth a. Next, the resin coating chamber 8 includes an upper position setting section 82 above the inflow chamber 81, a lower position setting section 83 below the inflow chamber 81, and a bottom section 84 below the upper position setting section 82. For details, see Figure 13.
As shown in FIG. 14, the lower position setting part 83 is supported on the bottom part 84 by a support bar 83a, and the upper position setting part 82 is supported above the lower position setting part 83 by a support column 82a. The resin coating chamber 8 is located at this bottom portion 8.
4, it is supported and fixed to the main body of the apparatus (not shown). top,
The lower position setting parts 82 and 83 are formed at positions corresponding to the first and second positioning parts 62 and 63 of the mandrel 6, respectively,
In cooperation with the first and second positioning parts 62 and 63, the mandrel 6
so that it can be hung vertically. That is, the upper position setting part 82 has a circular hole through which the first positioning part 62 of the mandrel 6 passes, and this hole is approximately equal to the outer diameter of the tubular cloth a passing around the outer circumference of the first positioning part 62. It has an inner diameter. Further, the lower position setting part 83 is the second positioning part 63 of the mandrel 6.
It has a circular hole for passing through, and this hole has an inner diameter approximately equal to the outer diameter of the tubular cloth a that passes around the outer periphery of the second positioning portion 63. Therefore, the tubular cloth a is located between the upper position setting part 82 and the first positioning part 62 of the mandrel 6, and between the lower position setting part 8
3 and the second positioning part 63 of the mandrel 6, and descends vertically. Next, the tip of the resin supply body 9 is connected to the side of the resin coating chamber 8, and the resin coating chamber 8
An inflow chamber bottom surface 85 is formed at a position below the connecting portion at the tip of the resin supply body 9 inside, from the inner circumferential surface toward the lower position setting portion 83 . A gap is provided between the inner end surface of the inflow chamber bottom surface 85 and the outer circumferential surface of the lower position setting part 83, and this gap is defined as an outer circumferential passage 86. A portion of the resin is guided from the outside of the tubular cloth a toward the bottom 84 of the resin coating chamber 8 through this outer circumferential passage 86. A hole having an inner diameter substantially the same as the intended outer diameter of the resin-coated tubular cloth a is formed in the bottom portion 84 of the resin-coated chamber 8 so as to pass through the hole in the vertical direction, as will be described later. This hole is an outer diameter defining portion 87, and this outer diameter defining portion 87 is provided at a position corresponding to the inner diameter defining portion 64 of the aforementioned mandrel 6.

In the resin coating chamber 8 having the above structure, the tubular cloth a is coated with resin on its inner and outer surfaces in the following manner. First, as described above, the tubular cloth a passes between the upper position setting part 82 and the first positioning part 62 of the mandrel 6 and between the lower position setting part 83 and the second positioning part 63 of the mandrel 6. and descend vertically. On the other hand, resin is supplied into the inflow chamber 81 from the tip of the resin supply body 9, and this resin fills the inflow chamber 81, and a part of the resin is transferred from the outer circumferential passage 86 to the lower position setting part 83. heading downwards,
The outer surface of the tubular cloth a is coated and impregnated. On the other hand, the resin filling the inflow chamber 81 reaches the outer periphery of the tubular fabric a, penetrates into the tubular fabric a through the weave or stitches of the tubular fabric a, oozes out to the inner periphery, and reaches the second positioning portion of the mandrel 6. It goes downward from the inner circumferential passage 66 formed in 63 and is coated and impregnated onto the inner surface of the tubular cloth a. In this way, the inner and outer surfaces of the tubular cloth a are coated and impregnated with resin, and the coating thickness is the same as the outer diameter defining portion 87 of the bottom 84 of the resin coating chamber 8 and the inner diameter defining portion 64 of the mandrel 6. determined by the distance between That is, the outer diameter defining portion 87 is a hole having an inner diameter that is approximately the same as the target outer diameter of the resin-coated tubular fabric a, and the inner diameter defining portion 64 is a hole having an inner diameter that is approximately the same as the target outer diameter of the resin-coated tubular fabric a. Since the resin-coated tubular fabric a passes between the defining portions 64 and 87, the coating thickness of the resin on the inner and outer surfaces of the tubular fabric a is determined. In addition, the adjustment of the resin coating thickness is as follows:
This can also be done by changing the unit time amount of resin supplied from the resin supply body 9 to the resin coating chamber 8 and the feeding speed of the tubular cloth a. That is, by decreasing the unit time amount of resin and increasing the feed rate, the coating thickness of the resin becomes smaller, and by doing the opposite, the coating thickness increases. Furthermore, in order to greatly change the coating thickness,
The inner diameter defining portion 64 of the mandrel 6 may be changed to have a different outer diameter, or the bottom portion 84 of the resin coating chamber 8 may be changed to having an outer diameter defining portion 87 having a different inner diameter. Further, ring bodies having various diameters may be exchangeably attached to the inner diameter defining portion 64, and a shutter whose opening degree can be adjusted may be provided to the outer diameter defining portion 87. Furthermore, tubular cloth a
In order to coat only the inner surface of the tubular cloth a with resin, in the above embodiment, the outer circumferential passage 86 is closed and the inner diameter of the outer diameter defining portion 87 is adjusted to be approximately the same as the outer diameter of the tubular cloth a without resin coating. good. The outer circumferential passage 86 may be closed by installing an on-off valve and closing the valve, or by replacing parts. On the other hand, in order to coat only the outer surface of the tubular fabric a with resin, the mandrel 6 of the above embodiment may be replaced with a cylindrical one having an outer diameter approximately equal to the inner diameter of the tubular fabric a. In the resin coating chamber 8, the tubular cloth a whose inner and outer peripheries are coated with resin is further lowered and subjected to heat treatment by the heating device 7.

An embodiment of this heating device 7 will be explained based on FIGS. 17 to 19. The heating device 7 of this embodiment is made up of a pair of left and right casings 71, 71 that face each other and can be opened and closed, and a tubular cloth a (not shown in FIGS. 12 to 14) is provided in the center between the casings 71, 71. A space 72 is formed for insertion. A plurality of heating elements 73 are attached to each casing 71 in a horizontal direction and in a plurality of stages in a vertical direction. A temperature adjustment device 74 is arranged at each stage to sense the internal temperature and control the heating element 73. A bulge 74 is formed between each stage to suppress upward movement of heat. This heating device 7 has a small internal volume to retain heat, and can raise the temperature from room temperature to 300° C. very easily and within a single hour. Further, the heat treatment can be freely adjusted depending on the type of the tubular cloth a, etc. by adjusting the temperature by the temperature adjustment device 74 and adjusting the feeding speed of the tubular cloth a. In addition, during this heat treatment, a cylindrical body (not shown) having an outer diameter approximately equal to the target inner diameter of the tubular cloth a is suspended from the end of the mandrel 6, and while the tubular cloth a is passed around the outer periphery of the cylindrical body, The inside of the heating device 7 may be heated. Thereby, even during the heat treatment, the tubular cloth a is regulated by the cylindrical body, so that its inner diameter is further stabilized. The cylindrical body can also be used as a ladder body with many horizontal bars between two vertical bars.
It may be modified to have an appropriate shape that can define the inner diameter.

Next, still another embodiment will be described based on FIGS. 20 to 22. This device has a first drum 1
1, a first guide roller 21, a driven second guide roller 22, an upper roller 51 with an upwardly inclined frame 31 functioning as a guide, a lower roller 52, and a roller suspended from the upper roller 51. Mandrel 101 and resin supply section 12
1, a pressure roller 141, a pull-out roller 161,
and a second drum 12. Among these, the first drum 11
The configurations of the first guide roller 21, the second guide roller 22, the upwardly inclined frame 31, the upper roller 51, the lower roller 52, and the second drum 12 are substantially the same as in the previous embodiment. Therefore, its explanation will be omitted. In this embodiment, a mandrel 101 having a conical section 102 at the top and a cylindrical section 103 at the bottom is suspended from an upper roller 51 by a suspension rod 5 . The cylindrical portion 103 of this mandrel 101 functions as an inner diameter defining portion, and in this embodiment, the tubular fabric a
Since the inner circumferential surface of is not coated with resin, its outer diameter is set to be approximately equal to the inner diameter of the tubular cloth a. Next, the resin supply section 121 includes a doughnut-shaped die 122 and a resin supply body 123 such as an extruder or a screw pump. This die 122 has a circumferential hollow part 124 formed therein,
A resin discharge space 126 opening from the hollow portion 124 to the inner circumferential surface 125 of the die is also formed in a circumferential shape. Further, the tip of the resin supply body 123 is connected to an appropriate location on the outer circumferential side of the hollow portion 124 . Resin discharge space 1
26 are spaced apart in the vertical direction so that the resin supplied to the hollow portion 124 can be discharged in an appropriate amount. This die 122 is arranged at a position corresponding to the upper end of the cylindrical portion 103 of the mandrel. And dice 12
The inner diameter of the inner circumferential surface 125 of No. 2 is set approximately equal to the target outer diameter of the resin-coated tubular cloth a, and this inner circumferential surface 125 serves as an outer diameter defining portion. The tubular fabric a wraps the mandrel 101 therein and is sent downward. At this time, the tubular fabric a is expanded to its full inner diameter by the cylindrical portion 103 of the mandrel, and an appropriate amount of resin supplied from the resin discharge space 126 of the die 122 is applied to the outer peripheral surface of the tubular mesh a. coated. The tubular cloth a whose outer peripheral surface is coated with resin is further sent downward and reaches the pressure roller 141 . This pressure roller 1
Reference numeral 41 is for cooling and pressing the resin, and includes a pair of pressing roller bodies 142, 142. Each pressure roller body 14
2 has a groove 143 with a semicircular cross section in the center of its outer periphery, through which cooling water passes, and is arranged side by side with both grooves 143, 143 facing each other. 144 is formed between both pressure roller bodies 142, 142 (FIG. 22). The inner diameter of this hole 144 is set to be approximately equal to the target outer diameter of the resin-coated tubular fabric a. One (right side in the figure) pressure roller main body 142 has its central axis 145
It is rotated by a drive source 146 such as an electric motor connected to the drive source 146 by an appropriate connection means such as a chain. Also, this central axis 14
5 is connected to the center shaft 151 of the other pressure roller main body 142 (left side in the figure) by a chain 147, a gear 148, a gear 149, and a chain 150. As a result, as shown in FIG. 16, the right pressure roller main body 142 rotates to the left, and the left pressure roller main body 142 rotates to the right. Further, a pair of pull-out roller bodies 162 of the pull-out roller 161 are coaxially attached to both the gears 148 and 149.
, 162 are connected and rotate in conjunction with the pressure roller bodies 142, 142. The pressure roller body 142, 1
The lower end of the cylindrical portion 103 of the mandrel is inserted into the hole 144 formed by the hole 42 . Then, with the tubular cloth a passing through the cylindrical portion 103, the pressure roller bodies 142, 1
By being pushed downward by 42, the resin coated on its outer peripheral surface is compressed and cooled. Subsequently, the tubular cloth a is pulled out by the pull-out roller 161 and wound around the second drum 12, thereby completing the entire process. What is important here is that in order to minimize the influence of friction on the tubular cloth a when it passes between the cylindrical portion 103 of the mandrel and the pressure roller main body 142, the feeding speed of the pressure roller 141 and the pull-out roller 161 should be adjusted. It is to make them the same. In this embodiment, this is reliably achieved by driving the pressure roller 141 and the pull-out roller 161 by one drive source 146. As described above, in this embodiment, the adhesive strength of the resin to the cloth can be increased by cooling the resin of the tubular cloth a and applying uniform pressure from the outer periphery thereof using the pressure roller.

[0013]

As described above, the invention as set forth in claim 1 is capable of continuously and smoothly coating at least one of the inner and outer surfaces of a tubular fabric with a synthetic resin, and moreover, the thickness of the resin coating on the tubular fabric can be reduced. It has been possible to provide a method for coating the peripheral surface of a tubular cloth with synthetic resin, which can be kept constant. Further, the invention as claimed in claim 2 is capable of continuously and smoothly coating at least one of the inner and outer surfaces of the tubular fabric with the synthetic resin, and moreover, it is possible to maintain a constant coating thickness of the resin on the tubular fabric. The present invention provides an apparatus for coating the peripheral surface of a tubular cloth with a synthetic resin. Furthermore, the invention as set forth in claim 3 can provide a method for reliably coating the outer surface of a cloth with a synthetic resin to a constant thickness without performing tubular heat treatment. Furthermore, the invention as set forth in claim 4 provides an apparatus that can reliably coat the outer surface of cloth with a synthetic resin to a constant thickness without performing heat treatment. that's all,
The tubular cloth whose circumferential surface is coated with synthetic resin, obtained by carrying out the present invention, can be used for various hoses and packaging bags used for transporting various fluids such as water, air, oil, and powder and granular materials. Furthermore, by cutting the tubular fabric vertically, the thick one can be used as an industrial belt, and the thin one can be used as artificial leather. The present invention provides a resin coating method and apparatus.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of an apparatus for coating the peripheral surface of a tubular cloth with a synthetic resin according to an embodiment.

FIG. 2 is a sectional view of a suspension device in the device.

FIG. 3 is a plan view of the upper bearing of the suspension device.

FIG. 4 is a plan view of the lower bearing of the suspension device.

FIG. 5 is a sectional view of another embodiment of the suspension device.

FIG. 6 is a plan view of the upper roller of the suspension device.

FIG. 7 is a plan view of the lower roller of the suspension device.

FIG. 8 is a plan view of the resin coating chamber.

FIG. 9 is an explanatory diagram of the internal structure of the resin coating chamber.

FIG. 10 is an enlarged view of the main part of FIG. 9;

11 is a plan view of portion XI in FIG. 9; FIG.

12 is a sectional view taken along the line XII-XII in FIG. 10. FIG.

FIG. 13 is a plan view of the bottom of the resin coating chamber.

FIG. 14 is a central vertical cross-sectional view of FIG. 13;

FIG. 15 is a plan view of the inflow chamber of the resin coating chamber.

FIG. 16 is a longitudinal cross-sectional view of FIG. 15;

FIG. 17 is a plan view of the heating device.

FIG. 18 is a side view of the same.

19 is a side view taken along the line X-X in FIG. 18. FIG.

FIG. 20 is a schematic diagram of an apparatus for coating the outer surface of a tubular cloth with a synthetic resin according to another embodiment.

FIG. 21 is a front view of a pressure roller in the apparatus.

FIG. 22 is a plan view of the same. 4... Suspension device, 5... Suspension rod, 6, 101... Mandrel, 7... Heating device, 8... Resin coating chamber, 9... Resin supply body, 63... Inner circumference passage, 64... Inner diameter defining part, 83... Outer circumference passage , 84...bottom of the resin coating chamber, 87...
Outer diameter regulating section, 121...Resin supply section, 141, 142
... Pressure roller, 161 ... Pull-out roller, a ... Tubular cloth.

Claims (4)

[Claims] Claim 1: The mandrel is suspended from above and inserted into the resin-coated part, and the resin-coated part is provided with an outer diameter defining part having an inner diameter that is approximately the same as the intended outer diameter of the resin-coated tubular cloth, The mandrel is provided with an inner diameter defining part having an outer diameter that is approximately the same as the intended inner diameter of the tubular cloth, the tubular cloth is passed around the outer periphery of the mandrel from above, and the resin supplied from the resin coating part is applied to at least the inner and outer surfaces of the tubular cloth. At the same time, by passing the tubular cloth between the inner diameter defining part and the outer diameter defining part, the resin is applied to at least one of the inner and outer surfaces of the tubular cloth. A method for coating the peripheral surface of a tubular cloth with a synthetic resin, the method comprising coating the synthetic resin to a predetermined thickness. Claim 2: A mandrel through which the tubular cloth is passed around its outer periphery, and a resin coating chamber through which the mandrel is inserted while being suspended from above, and the resin coating chamber supplies resin to the inside of the mandrel. A supply body, an outer circumferential passage that guides the resin supplied to the resin coating chamber to the outer circumferential surface of the tubular cloth, an inner circumferential passage that guides the resin supplied to the resin coating chamber to the inner circumferential surface of the tubular cloth, and in the resin coating chamber. a thickness determining part that determines the thickness of the resin coated on the inner and outer surfaces of the tubular cloth; an outer diameter defining portion having an inner diameter that is approximately the same as the target outer diameter of the coated tubular fabric; the outer diameter defining portion is provided below the outer circumferential passage and the inner circumferential passage of the resin coating chamber; is provided on the mandrel, and the inner diameter defining part is arranged in a position corresponding to the outer diameter defining part, and the peripheral surface of the tubular cloth is coated with a synthetic resin. [Claim 3] A mandrel is suspended from above and inserted into the resin-coated part and a pressure roller device disposed below the mandrel, and a tubular cloth is passed from above around the outer periphery of the mandrel, so that the resin supplied from the resin-coated part is passed through the mandrel from above. The outer surface of the tubular fabric is covered with resin, and the resin-coated tubular fabric is crimped between the crimping roller and the mandrel, and the resin-coated tubular fabric is crimped at a speed equal to the feed speed of the crimping roller. A method of coating the peripheral surface of a tubular cloth with a synthetic resin, which is characterized by pulling out the cloth. 4. A resin-coated portion, a pressure roller device disposed below the pressure roller device, a pull-out roller disposed below the pressure roller device, and a resin-coated portion and a pressure roller device that are suspended from above and inserted into the pressure roller device. The crimping roller device and the pull-out roller rotate at the same feed speed, and the outer periphery of the tubular cloth passed from above around the periphery of the mandrel is coated with resin and crimped by the crimping roller. An apparatus for coating the peripheral surface of a tubular cloth with a synthetic resin, characterized in that the peripheral surface of the tubular cloth is then pulled out using a pull-out roller.