JP3851297B2 - Tubular product manufacturing apparatus, manufacturing method, and tubular product - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a resin or rubber tubular product manufacturing apparatus, a manufacturing method, and a tubular product. Specifically, a liquid resin or rubber is applied to the outer peripheral surface of a cylindrical mold, and the applied material is cured. The tubular product is manufactured by releasing the mold, and the manufactured tubular product is suitably used for an intermediate transfer belt of an image forming apparatus.
[0002]
[Prior art]
Conventionally, resin or rubber tubular materials have been used in various fields as intermediate transfer belts for electrophotographic image forming apparatuses such as copying machines, printers, and facsimiles, and various other belts.
When used as an intermediate transfer belt or the like of an image forming apparatus, it is required to have excellent heat resistance and a uniform thickness in order to express desired performance. Conventionally, a tubular body having a uniform thickness is required. Various proposals have been made to obtain it.
[0003]
For example, in JP-A-9-85756 (Patent Document 1), a liquid heat-resistant resin having a viscosity of 10 to 1500 poise at 25 ° C. is continuously applied to the outer surface or inner surface of the core body by a dispenser while rotating the core body. And a method of manufacturing a tubular product in which an applied layer is formed by spirally winding the supplied liquid heat-resistant resin by moving the supply part of the dispenser in the direction of the rotation axis of the core body. ing.
[0004]
[Patent Document 1]
JP-A-9-85756
[Problems to be solved by the invention]
However, in the manufacturing method of Patent Document 1, if the tip of the nozzle does not accurately follow the outer peripheral surface of the mold and a minute gap is formed between the nozzle and the mold during application, air biting occurs. There is a problem that irregularities are easily formed on the coated surface. If the pressing force of the nozzle is increased in order not to generate this gap, the applied material is scraped at the tip of the nozzle, resulting in poor application, and the thickness of the tubular article to be formed is not uniform. Therefore, in order to obtain a uniform coating thickness, it is essential to adjust the parallelism of the mold and the dispenser in the scanning direction. However, automation is problematic in terms of the size of the equipment and the cost.
[0006]
The present invention has been made in view of the above-described problems, and it is an object of the present invention to easily manufacture a tubular product made of resin or rubber having a uniform thickness by causing the nozzle outlet to follow the outer peripheral surface of a mold. .
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, first, the present invention provides a resin or rubber that is liquid and heat-resistant while a nozzle of a dispenser is brought into contact with the outer peripheral surface of a rotating mold and moved in the axial direction of the mold. An apparatus for producing a tubular product made of resin or rubber that is continuously applied from the nozzle and is released from the mold after the resin or rubber is cured,
The mold is formed of a cylindrical object that is arranged with the axial direction horizontal, and a tapered discharge port that is inclined at a predetermined angle at the tip of the nozzle is disposed on the outer peripheral surface of the mold in the downward rotation direction.
The inclined base portion side of the tapered discharge port is set to a contact position that contacts the outer peripheral surface of the mold, and the acute angle portion on the tip side is set to the gap forming side without contacting the outer peripheral surface of the mold, and the nozzle And the mold is arranged such that the contact side of the tapered discharge port is the front side in the mold rotation direction and the gap forming side is the rear side in the rotation direction,
The coating angle θ that the line segment connecting the contact position and the center of the mold cross section becomes a horizontal line is set in a range of 40 to 85 degrees, and the inclination that is the lower side of the tapered discharge port of the nozzle The gap forming angle δ formed by the base and the outer peripheral surface of the mold is 0 degree <δ ≦ 30 degrees,
In addition, there is provided an apparatus for manufacturing a tubular article, comprising spring means for pressing the nozzle with a required pressure so as to be able to follow along the outer peripheral surface of the mold.
[0008]
According to the above configuration, it is possible to follow while keeping the pressing force of the nozzle against the outer peripheral surface of the mold evenly by the spring means, even if there is a slight misalignment in the parallelism of the mold and the scanning direction, Since the nozzle is automatically followed and pressed at a required pressure, the coating thickness can be made uniform without causing unevenness, and the accuracy of the manufactured tubular product can be improved.
In addition, since the nozzle outlet that comes into contact with the outer peripheral surface of the mold is tapered, a liquid material made of liquid resin or rubber can be reliably applied to the outer peripheral surface of the mold by making contact with the front side in the mold rotation direction. Since the gap is formed without contacting the outer peripheral surface of the mold on the rear side in the mold rotation direction of the discharge port, the applied liquid material is not scraped off at the edge of the discharge port. The taper angle of the discharge port is about 45 degrees, but the taper angle of the discharge port may be changed depending on the nozzle arrangement angle with respect to the mold outer peripheral surface, which will be described later, and is preferably in the range of 30 to 80 degrees.
Note that moving the nozzle in the mold axial direction means rotating the mold at a predetermined position and moving the nozzle in the mold axial direction, and moving the nozzle while rotating the mold while fixing the nozzle. Including cases.
[0010]
Specifically, a nozzle is disposed on the upper half circumference side of the mold that is arranged with the axial direction horizontal, and on the side of the downward rotation surface, the nozzle pressing position is the downward rotation side position of the mold, and the discharge of the nozzle The abutting side that presses the lower part of the outlet against the outer peripheral surface of the mold, and the acute angle protruding part at the upper part leave a gap with the outer peripheral surface of the mold .
As described above, in the nozzle arranged on the side with respect to the outer peripheral surface of the mold, the line segment connecting the pressing position of the nozzle to the mold and the center position of the mold in the mold cross-sectional direction is a horizontal plane. The coating angle θ is 40 degrees ≦ θ ≦ 85 degrees. If the angle is smaller than 40 degrees, the portion of the discharge port along the outer peripheral surface of the mold is reduced. It becomes difficult to apply. On the other hand, when the angle is greater than 85 degrees, there is a possibility that the nozzle may not be able to follow if there is an error in the parallelism of the mold and the dispenser in the scanning direction.
[0011]
In addition, the gap forming angle δ formed by the inclined base portion which is the lower side in the rotational direction of the tapered discharge port of the nozzle and the outer peripheral surface of the mold is 0 degree <δ ≦ 30 degrees. In this case, the gap disappears, and there is a risk of scraping it in contact with the coating material. On the other hand, if it exceeds 30 degrees, the gap becomes too large and the coating is performed while entraining air.
[0012]
The spring means for pressing the discharge port of the nozzle against the outer peripheral surface of the mold has an elbow fitting interposed between a supply pipe for supplying a raw material made of the liquid resin or rubber at a predetermined pressure and the nozzle. While a transmission plate is projected from the metal fitting, a pair of upper and lower clamping plates are projected from the raw material supply pipe, a spring plunger is attached to the clamping plate, and the transmission plate is interposed between the upper and lower spring plungers. With a sandwiched configuration,
According to the parallelism of the mold and the dispenser scanning direction by the spring means, the nozzle is moved close to and away from the outer peripheral surface of the mold and can be followed with a predetermined pressing pressure.
[0013]
As described above, since the transmission plate interlocked with the nozzle is sandwiched between the pistons of the opposing spring plunger as the spring means, the original position of the transmission plate is the same as the spring pressure of the spring plungers on both sides. Neutral position. Therefore, at the start of painting, if the nozzle discharge port is pressed against the outer peripheral surface of the mold at the neutral position, the nozzle will then move to the outer peripheral surface of the mold due to the correlation between the spring pressures of the spring plungers on both sides. It is automatically controlled so that it can follow. Thus, by using a pair of spring plungers as spring means, it becomes possible to cause the nozzle to accurately follow even a deviation of parallelism of several mm.
[0014]
Secondly, the present invention provides a method for producing a tubular product. In the manufacturing method, the nozzle is rotated while rotating a mold made of a cylindrical object arranged with the axial direction horizontal, and the nozzle of the dispenser is brought into contact with the outer peripheral surface thereof to move in the axial direction of the mold. More liquid heat resistant resin or rubber is discharged and applied continuously,
A method of manufacturing a tubular product made of resin or rubber that is released from the mold after curing the resin or rubber,
On the outer peripheral surface of the mold in the downward rotation direction, a tapered discharge port that is inclined at a predetermined angle at the tip of the nozzle is disposed,
The nozzle is pressed from the side against the outer peripheral surface of the mold with a required pressure by a spring means to follow the outer peripheral surface of the mold,
And, as a contact position where the inclined base side of the tapered outlet is in contact with the outer peripheral surface of the mold, a gap is formed without contacting the acute angle portion on the distal end side with the outer peripheral surface of the mold, The nozzle and the mold have a contact side of the tapered discharge port as a front side in the mold rotation direction and a gap forming side as a rear side in the rotation direction ,
The coating angle θ that the line segment connecting the contact position and the center of the mold cross section becomes a horizontal line is set in a range of 40 to 85 degrees, and the inclination that is the lower side of the tapered discharge port of the nozzle The gap forming angle δ formed by the base and the outer peripheral surface of the mold is set to 0 degree <δ ≦ 30 degrees, and the applied resin or rubber is not scraped off to make the coating thickness uniform. It is a feature.
[0015]
The manufacturing method may be a method of manufacturing using the above-described manufacturing apparatus, but is not necessarily required by the manufacturing method.
According to the above manufacturing method, even if there is a minute shift between the mold and the dispenser scanning direction, the nozzle can be automatically followed by the spring means, and the coating amount can be made uniform. In addition, since the nozzle discharge port prevents the applied material from being scraped off at the nozzle edge, a tube having a uniform thickness can be produced without causing unevenness or unevenness on the application surface. .
[0016]
Tube Jobutsu that produced, or Ru are prepared in the method by the production equipment is suitably used as an intermediate transfer belt or the transfer belt of the image forming apparatus i.e., obtained by the manufacturing apparatus or manufacturing method of the present invention The resulting tubular product has a seamless belt shape with uniform thickness and high dimensional accuracy. Therefore, it can be suitably used as an intermediate transfer belt, a transfer belt or the like of an image forming apparatus. For example, in the case of an intermediate transfer belt, the thickness of the tubular article is preferably 50 μm to 200 μm. According to this manufacturing method, a tubular product having a thickness of about 30 μm to 300 μm can be obtained with a uniform thickness.
[0017]
As the heat resistant resin, a polyimide resin or a polyamideimide resin is preferably used. Others include polyetherimide resins, epoxy resins, polybenzimidazole resins, polybenzoxazole resins, polyphenylene sulfide resins, polyether ketone resins, polyether sulfone resins, polysulfone resins, polyarylate resins, fluororesins, etc., precursors It is preferably applied as a solution. Among these, polyamideimide resin and polyimide resin are preferable in terms of high elastic modulus and processability.
Examples of the heat resistant rubber include silicone rubber and urethane rubber.
In addition, various additives such as inorganic fillers may be added to the heat-resistant resin or rubber, and a dispersant, a solvent, a viscosity modifier and the like can be added. The liquid heat-resistant resin or rubber is preferably applied at 10 to 50 ° C. with a viscosity of 0.1 Pa · s to 20 Pa · s.
[0018]
For the curing of the resin or rubber, it is necessary to heat the mold coated with the resin or rubber at least to the extent that the tubular material has self-supporting property. The heating temperature is preferably 130 ° C. or higher. In order to finally cure, it is necessary to heat to a very high temperature of about 200 ° C to 350 ° C. The heating time is preferably 1 hour to 5 hours, more preferably 1.5 hours to 3 hours.
[0019]
As the material of the mold, various metals such as aluminum and iron can be used. In order to make it easier to remove the tubular material, the outer peripheral surface of the mold may be subjected to a mold release treatment. As the mold release treatment, a conventionally known mold surface treatment can be performed, and as the mold release agent used for the mold release treatment, a release agent such as a fluorine type or a silicone type is preferable, and a baking type is particularly preferable. . In addition, ceramic coating such as alumina, silica, zirconia, aluminum nitride may be applied.
[0020]
The demolding of the cured resin or rubber is preferably after cooling the tubular product or the mold. Accordingly, the tubular object can be easily removed from the mold, and the tubular object can be removed in a good state without affecting the dimensional accuracy and performance of the tubular object.
[0021]
In addition, the tubular product of the present invention is provided with one or more layers of resin, rubber, elastomer, or the like, or a metal layer on the inner peripheral surface side and / or outer peripheral surface side, and two or more layers such as three or more layers. It can also be used as a layer structure. It should be noted that the outer peripheral surface of a cylindrical substrate such as a roller can be used by coating the tubular product of the present invention.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 3 show a resin tubular product manufacturing apparatus 10 of the present invention.
The manufacturing apparatus 10 has a cylindrical mold 11 which is arranged with the axis direction horizontal and is rotated by a rotating means in the direction of arrow A in the figure, and the outer peripheral surface 11a of the mold 11 is liquid and heat resistant. A dispenser 12 that continuously feeds a resin or rubber-based material as a main component. The dispenser 12 is moved by a moving means (not shown) along the axial direction on the side of the mold 11. The
[0023]
The dispenser 12 has an L-shaped elbow fitting 21 interposed between the raw material supply pipe 15 and the nozzle 13, and a transmission plate 21 </ b> A projecting from the elbow fitting 21 by a spring means 20 attached to the raw material supply pipe 15. The nozzle 13 is configured to automatically follow the outer peripheral surface 11a of the mold 11 by the spring means 20.
[0024]
As shown in FIG. 2, a small-diameter cylindrical portion 13 a having a rectangular cross section is provided on the nozzle 13 side of the nozzle 13, and the tip thereof is a tapered discharge port 13 b. The discharge port 13b has the inclined base portion 13b-1 side in contact with the outer peripheral surface 11a of the mold 11, and the sharp angle portion 13b-2 on the distal end side is not in contact with the outer peripheral surface 11a of the mold 11 and has a gap. The forming side. In the present embodiment, the taper angle of the discharge port formed by the tapered discharge port 13b of the nozzle 13 with respect to the axial direction of the nozzle 13 is 45 degrees.
The nozzle 13 and the mold 11 are the contact side, which is the inclined base portion 13b-1 side of the tapered discharge port 13b, on the front side in the mold rotation direction A, and the acute angle portion 13b-2 side of the tapered discharge port 13b. The gap forming side is arranged as the rear side in the rotation direction A.
[0025]
Specifically, as shown in FIG. 2 (B), and is abutted against the inclined base 13 b-1 of the discharge port 13 b of the nozzle 13 on half surfaces of the downward rotational direction of the die 11, this embodiment In the embodiment, the coating angle θ that the line segment connecting the contact position P and the center O of the mold cross section becomes a horizontal line is set to 50 degrees.
2C, the nozzle 13 is inclined in the axial direction of the mold 11, and the nozzle 13 on the side opposite to the material coating direction (arrow B in the figure), which is the moving direction of the nozzle 13, is provided. The acute angle portion 13 b-3 is not brought into contact with the outer peripheral surface 11 a of the mold 11. In the present embodiment, in the axial direction of the mold 11, the gap forming angle δ formed by the end surface of the inclined base portion 13 b-1 on the lower side of the tapered discharge port 13 b of the nozzle 13 and the outer peripheral surface 11 a of the mold 11 is set to 10. I am trying.
[0026]
As shown in FIGS. 3A to 3G, the spring means 20 projects the transmission plate 21 </ b> A from the elbow fitting 21, while fixing one end of the pressing force adjusting tool 22 to the raw material supply pipe 15 with a bolt. A spring plunger 23 (23A, 23B) is attached facing the tip of a pair of sandwiching plates 22a , 22b protruding from the other end, and the transmission plate 21A is sandwiched between the upper and lower spring plungers 23.
The spring plunger 23 includes a coil spring 23a and a center pin 23b that is biased by the coil spring 23a and protrudes / retreats from the cylinder.
Thus, the elbow fitting 21 can be tilted by the spring pressure of the spring plungers 23 </ b> A and 23 </ b> B, the movement of the nozzle 13 interlocking with the movement of the elbow fitting 21 is absorbed, and the nozzle 13 is pressed against the outer peripheral surface 11 a of the mold 11. The force can be automatically controlled to the required pressure.
[0027]
Next, a method for producing a tubular object using the above apparatus will be described.
First, a coating material composed of a precursor solution of a heat resistant resin to which carbon black or the like is added in order to impart conductivity is prepared in advance. Polyamideimide resin is used as the heat resistant resin.
The mold 11 is rotated in the direction of arrow A in the figure, and the dispenser 12 is moved in the axial direction of the mold 11 (in the direction of arrow B in the figure), so that the raw material supplied to the dispenser 12 is The mold 11 is continuously applied to the outer peripheral surface 11a .
[0028]
At this time, the pressing force of the nozzle 13 against the outer peripheral surface 11a of the mold 11 is regulated at the neutral position of the pair of upper and lower spring plungers 23 of the spring means 20 and controlled to a required pressure at the start of operation. Further, the spring means 20 controls the pressure to a required pressure, and the tapered discharge port 13 b of the nozzle 13 is brought into contact with the outer peripheral surface 11 a of the mold 11 from an oblique direction with respect to the outer peripheral surface 11 a of the mold 11.
Specifically, the front side of the taper-shaped discharge port 13b in the mold rotation direction A is abutted against the outer peripheral surface 11a of the mold 11, and the coating is performed while the taper-shaped discharge port 13b in the mold rotation direction A is applied. There is a gap between the rear side and the outer peripheral surface 11 a of the mold 11.
[0029]
During application of the material, the pressing force of the nozzle 13 to the required pressure by the spring means 20, and, with respect to the vertical direction (mold across the transmission plate 21 A between the center pin 23b of the upper and lower spring plunger 23 Therefore, the taper-shaped discharge port 13b of the nozzle 13 is automatically applied to the outer peripheral surface 11a of the mold 11 with high accuracy even if there is a slight deviation in parallelism between the mold and the dispenser scanning direction. Can be made to follow. Therefore, the coating thickness can be made uniform without causing unevenness.
[0030]
Further, the discharge port of the nozzle 13 is tapered discharge port 13b, since the a gap between the mold outer peripheral surface 11a in the rotational direction rear side, the coating material is applied to the mold outer peripheral surface 11a, a tapered Since there is no shaving at the edge of the rotational discharge side 13b on the rotation delay side (the rear side of the rotation method) or the coated coating material is not scraped off at the edge of the tapered discharge port 13b, poor coating or poor thickness occurs. Nor.
Therefore, the raw material can be applied uniformly over the entire outer peripheral surface 11a without thickness unevenness, and the tubular product 30 having a uniform thickness with a thickness variation of ± 3 μm or less can be easily obtained.
[0031]
The raw material consisting of the precursor solution of the heat resistant resin applied on the outer peripheral surface 11a of the mold 11 by the above method is heated while rotating the mold 11 at 150 ° C. for 1 hour and then at 300 ° C. for 3 hours. Harden. At this time, the heat resistant resin of the precursor solution is completely imidized. After the precursor solution is cured in this way to form the tubular product 30, the tubular product 30 is released from the mold 11 after cooling to room temperature.
[0032]
As shown in FIG. 4A, the tubular product 30 obtained by the above method can be used as a rigid layer of an intermediate transfer belt 40 having a multilayer structure, for example, as shown in FIG. The intermediate transfer belt 40 may have a multilayer structure including a rigid layer based on the tubular product 30 of the present invention, an elastic layer 41, and a surface coating layer 42. Note that it is possible to use only the tubular material 30 as an intermediate transfer belt. In addition, it can be suitably used as a transfer belt of an image forming apparatus.
[0033]
In the above-described embodiment, the nozzle side is moved, but the nozzle side may be fixed and the coating may be performed by moving in the axial direction while rotating the mold side.
[0034]
Hereinafter, the Example of the manufacturing method of the resin or rubber-made tubular product of this invention and a comparative example are explained in full detail.
[0035]
Example 1
A tubular product was prepared by applying a polyamideimide precursor solution in the same manner as in the above embodiment. A height gauge was attached to the nozzle, and the runout was measured by scanning a 400 mm length from the coating start position to the end position on the outer peripheral surface of the mold. The result was 200 μm, indicating rotational runout at one location on the outer peripheral surface of the mold. When measured, the rotation was elliptical (eccentric rotation), and the amplitude width, which is the vibration, was 80 μm.
Since the pressing force of the nozzle was made the required pressure by the spring means, the nozzle automatically followed the outer peripheral surface of the mold, and the nozzle position was not adjusted during the application. After the application was completed, the coated mold was heated while rotating to remove the mold after the resin was cured to obtain a tubular product (inner diameter 180 mm, length 400 mm, thickness 100 μm). There was no unevenness or unevenness in the tubular material, and the thickness variation was ± 1 μm.
[0036]
(Comparative Example 1)
Without attaching the spring means, coating was performed in a state where the nozzle did not automatically follow the outer peripheral surface of the mold to obtain a tubular product. Depending on the application situation, the application was performed while adjusting the nozzle position during application. Others were the same as in Example 1.
Although there was no unevenness or unevenness in the tubular material, the thickness variation was ± 4 μm.
[0037]
(Comparative Example 2)
Without attaching the spring means, coating was performed in a state where the nozzle did not automatically follow the outer peripheral surface of the mold to obtain a tubular product. And it was the same as that of Example 1 except that the nozzle position was not adjusted during application.
During the application, the applied material was scraped by the nozzle and remained in a streak shape, and the thickness variation was ± 13 μm.
[0038]
As described above, in Example 1, since the tapered discharge port of the nozzle automatically follows the minute change of the outer peripheral surface of the mold, a tubular product having a uniform thickness was obtained. On the other hand, in Comparative Example 1, it is necessary to change the position of the discharge port of the nozzle according to the application state during the application, and the thickness variation is ± 4 μm even if the position of the discharge port of the nozzle is adjusted. The variation was larger than that in Example 1. In Comparative Example 2, the nozzle position was not adjusted. The thickness variation was as large as ± 13 μm.
[0039]
【The invention's effect】
As is apparent from the above description, according to the present invention, the nozzle is automatically pressed against the outer peripheral surface of the mold by the spring means, and the tapered discharge port of the nozzle is automatically applied to the outer peripheral surface of the rotating mold. Therefore, it is not necessary to adjust the position of the discharge port of the nozzle during application, and the contact between the nozzle and the mold can always be maintained in a desired state.
[0040]
In addition, the nozzle discharge port is a tapered discharge port, and a gap is formed between the discharge port and the outer peripheral surface of the mold on the rear end side in the mold rotation direction so that the coating material is not scraped at the edge of the discharge port. Therefore, it is possible to automatically apply the resin or the rubber with a uniform thickness without causing poor application or poor thickness. Therefore, even when there is a slight deviation in the parallelism between the nozzle and the outer peripheral surface of the mold, it is possible to easily manufacture a resin or rubber tubular product having a uniform thickness.
[0041]
The tubular product of the present invention produced by the above method is excellent in heat resistance, has good dimensional accuracy, and has a uniform thickness without scratches or tears. Therefore, an image forming apparatus such as a copying machine, a facsimile, or a printer. It can be suitably used as an intermediate transfer belt, a transfer belt, etc.
[Brief description of the drawings]
FIGS. 1A and 1B are schematic views of a relationship between a nozzle and a mold.
FIGS. 2A and 2B are explanatory diagrams of contact positions between the nozzle and the outer peripheral surface of the mold, FIG. 2C is a diagram showing the relationship between the coating direction and the inclination of the nozzle, and FIG. FIG.
FIG. 3 is an explanatory diagram of the component configuration of the spring means, (A) to (C) are diagrams showing the relationship between the nozzle, the spring plunger, and the elbow fitting, and (D) to (F) are the configuration of the nozzle. (G) is a block diagram of a spring plunger.
4A is a resin or rubber tubular product of the present invention, and FIG. 4B is a diagram used as an intermediate transfer belt having a multilayer structure.
[Explanation of symbols]
11 Mold 11a Outer peripheral surface 12 Dispenser 13 Nozzle 13b Tapered discharge port 15 Raw material supply pipe 20 Spring means 21 Elbow fitting 21A Transmission plate 22 Pressing force adjuster
22a, 22b Holding plate 23 (23A, 23B) Spring plunger 23a Coil spring 30 Tubular object

Claims (3)

A dispenser nozzle is brought into contact with the outer peripheral surface of the rotating mold, and liquid or heat-resistant resin or rubber is continuously applied from the nozzle while moving in the mold axial direction, and the resin or rubber is cured. An apparatus for producing a tubular product made of resin or rubber, which is released from the mold after being made,
The mold is formed of a cylindrical object that is arranged with the axial direction horizontal, and a tapered discharge port that is inclined at a predetermined angle at the tip of the nozzle is disposed on the outer peripheral surface of the mold in the downward rotation direction.
The inclined base portion side of the tapered discharge port is set to a contact position that contacts the outer peripheral surface of the mold, and the acute angle portion on the tip side is set to the gap forming side without contacting the outer peripheral surface of the mold, and the nozzle And the mold is arranged such that the contact side of the tapered discharge port is the front side in the mold rotation direction and the gap forming side is the rear side in the rotation direction,
The coating angle θ that the line segment connecting the contact position and the center of the mold cross section becomes a horizontal line is set in a range of 40 to 85 degrees, and the inclination that is the lower side of the tapered discharge port of the nozzle The gap forming angle δ formed by the base and the outer peripheral surface of the mold is 0 degree <δ ≦ 30 degrees,
And the manufacturing apparatus of the tubular thing characterized by including the spring means which presses the said nozzle with required pressure so that tracking is possible along the said metal mold | die outer peripheral surface. The spring means includes an elbow fitting interposed between the nozzle and the supply pipe for supplying the liquid resin or rubber raw material at a required pressure, and a power transmission plate protruding from the elbow fitting, A pair of upper and lower clamping plates are projected from the supply pipe, a spring plunger is attached to face the clamping plates, and the transmission plate is sandwiched between the upper and lower spring plungers.
2. The tubular article manufacturing apparatus according to claim 1, wherein the spring means allows the nozzle to be moved close to and away from the outer peripheral surface of the mold in accordance with irregularities on the outer peripheral surface of the mold and to follow with a uniform pressing pressure . Rotating a cylindrical mold placed horizontally with the axis line in the horizontal direction, with the nozzle of the dispenser coming into contact with the outer peripheral surface and moving in the axis direction of the mold, the liquid heat resistance from the nozzle It is applied continuously by discharging resin or rubber having
A method of manufacturing a tubular product made of resin or rubber that is released from the mold after curing the resin or rubber,
On the outer peripheral surface of the mold in the downward rotation direction, a tapered discharge port that is inclined at a predetermined angle at the tip of the nozzle is disposed,
The nozzle is pressed from the side against the outer peripheral surface of the mold with a required pressure by a spring means to follow the outer peripheral surface of the mold,
And, as a contact position where the inclined base side of the tapered outlet is in contact with the outer peripheral surface of the mold, a gap is formed without contacting the acute angle portion on the distal end side with the outer peripheral surface of the mold, The nozzle and the mold have a contact side of the tapered discharge port as a front side in the mold rotation direction and a gap forming side as a rear side in the rotation direction ,
The coating angle θ that the line segment connecting the contact position and the center of the mold cross section becomes a horizontal line is set in a range of 40 to 85 degrees, and the inclination that is the lower side of the tapered discharge port of the nozzle The gap forming angle δ formed by the base and the outer peripheral surface of the mold is set to 0 degree <δ ≦ 30 degrees, and the applied resin or rubber is not scraped off to make the coating thickness uniform. A method for producing a tubular article.

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