WO2002020237A1 - Procede de fabrication d'un corps cylindrique elastique, procede de fabrication d'un rouleau elastique, corps cylindrique elastique, et rouleau elastique - Google Patents
Procede de fabrication d'un corps cylindrique elastique, procede de fabrication d'un rouleau elastique, corps cylindrique elastique, et rouleau elastique Download PDFInfo
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- WO2002020237A1 WO2002020237A1 PCT/JP2001/006992 JP0106992W WO0220237A1 WO 2002020237 A1 WO2002020237 A1 WO 2002020237A1 JP 0106992 W JP0106992 W JP 0106992W WO 0220237 A1 WO0220237 A1 WO 0220237A1
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- WIPO (PCT)
- Prior art keywords
- cylindrical body
- filler
- elastic
- polymer material
- centrifugal molding
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C41/04—Rotational or centrifugal casting, i.e. coating the inside of a mould by rotating the mould
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G1/00—Calenders; Smoothing apparatus
- D21G1/02—Rolls; Their bearings
- D21G1/0233—Soft rolls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C41/04—Rotational or centrifugal casting, i.e. coating the inside of a mould by rotating the mould
- B29C41/042—Rotational or centrifugal casting, i.e. coating the inside of a mould by rotating the mould by rotating a mould around its axis of symmetry
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2793/00—Shaping techniques involving a cutting or machining operation
- B29C2793/009—Shaping techniques involving a cutting or machining operation after shaping
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C41/22—Making multilayered or multicoloured articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
- B29K2105/16—Fillers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0037—Other properties
- B29K2995/0046—Elastic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0037—Other properties
- B29K2995/0063—Density
- B29K2995/0064—Non-uniform density
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49544—Roller making
- Y10T29/4956—Fabricating and shaping roller work contacting surface element
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49544—Roller making
- Y10T29/4956—Fabricating and shaping roller work contacting surface element
- Y10T29/49563—Fabricating and shaping roller work contacting surface element with coating or casting about a core
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/4998—Combined manufacture including applying or shaping of fluent material
- Y10T29/49982—Coating
- Y10T29/49984—Coating and casting
Definitions
- the present invention generally relates to a method for producing an elastic cylinder and a method for producing an elastic roll, and more specifically, to a method for producing an elastic cylinder which does not contain voids therein and has excellent mechanical strength. And a method for producing an elastic roll.
- the present invention also relates to an elastic cylinder and an elastic roll used in various industries such as papermaking, ironmaking, film, and fiber, and more specifically, to a papermaking power render roll, a papermaking press roll, and a fiber calender.
- the present invention relates to a large, hard elastic roll used as a roll or a calendar roll for a magnetic recording medium, and an elastic cylindrical body used as an elastic covering layer thereof.
- Japanese Patent Publication No. 3-4 7359 discloses a method of manufacturing a hard roll using a conventional casting method.
- thermosetting resin-impregnated fiber material is wound around the outer peripheral surface of a metal roll core to form a fiber-reinforced lower winding layer.
- thermosetting synthetic resin raw material containing a filler is poured into a cylinder molding die having a predetermined size and cured at a predetermined temperature to form an outer layer cylinder.
- An outer layer cylinder is fitted over a metal roll core having a fiber capturing lower winding layer, and a low-viscosity adhesive is injected into an annular gap formed between the lower winding layer and the cylinder. It is cured at a predetermined temperature, and the lower winding layer and the cylinder are joined and integrated via an adhesive layer.
- the above-mentioned cylindrical body forming die was fixed vertically.
- the conventional method of manufacturing a hard roll has the following problems.
- the outer and inner surfaces of the molded cylinder are cut to obtain cylindricity. Therefore, it was necessary to increase the cutting allowance to allow for room. Because of this, the yield is poor There was a problem.
- JP-A-8-166011, JP-B-62-4704, JP-B-48-37373, and JP-A-56-41419 show conventional centrifugation.
- a method for forming a cylindrical body by a molding method is disclosed. It is known that according to such a conventional centrifugal molding method, voids can be effectively removed by centrifugal separation and a cylindrical body having excellent cylindricity can be molded.
- the packing material is concentrated at a desired position by utilizing the centrifugal separation action.
- Such a conventional centrifugal molding method has the following problems. That is, in general, since the reinforcing filler has a large specific gravity, the filler tends to concentrate on the outer surface side by centrifugal molding.
- the present invention has been made to solve the above problems, and has as its object to provide a method of manufacturing an elastic cylindrical body and a method of manufacturing an elastic knurled so that the yield can be improved. And
- Another object of the present invention is to provide a method of manufacturing an elastic cylinder and a method of manufacturing an elastic roll, which are improved so that voids can be removed and physical properties such as hardness can be stabilized.
- Still another object of the present invention is to provide a method for manufacturing an elastic cylindrical body and a method for manufacturing an elastic needle, which are improved so that local stress concentration and internal heat generation can be prevented and durability can be improved. To provide.
- Still another object of the present invention is to provide an elastic cylindrical body and an elastic shell manufactured by such a method.
- FIG. 1 is a sectional view of a centrifugal molding device used in the present invention.
- Fig. 2 shows the ⁇ -]! It is a line sectional view.
- FIG. 3 illustrates the cutting process in this effort.
- FIG. 4 is a new front view of an elastic cylinder obtained without a cutting step according to another embodiment of the present invention.
- 5A to 5C are conceptual diagrams illustrating a process of manufacturing a large roll from the elastic cylindrical body according to the present invention.
- FIG. 6 is a diagram showing the relationship between the measurement position of sample 1 and ash content and hardness.
- FIG. 7 is a diagram showing the relationship between the measurement position of sample 2 and the ash content and hardness.
- FIG. 8 is a diagram showing the relationship between the measurement position of sample 3 and the ash content.
- FIG. 9 is a diagram showing the relationship between the measurement position of sample 4, ash content, and hardness.
- FIG. 10 is a diagram showing the relationship between the measurement position of sample 5, ash content, and hardness.
- FIG. 11 is a diagram showing the relationship between the measurement position of sample 8, ash content, and hardness.
- FIG. 12 is a diagram showing the relationship between the measurement position of sample 9 and the ash content.
- FIG. 13 is a diagram showing the relationship between the measurement position of the sample 10, the ash content, and the hardness.
- FIG. 14 is a diagram showing the relationship between the measurement position of sample 11, ash content, and hardness.
- a mixed solution containing a liquid high-molecular material and a filler is injected into a centrifugal molding die, and centrifugally molded.
- a cylindrical body including the filled high-density packed layer is formed.
- the high density filling layer is removed to expose the uniform dispersion layer on the surface.
- the high-density packed layer is formed on the outer peripheral surface side of the uniform dispersion layer.
- the specific gravity of the filler is smaller than the specific gravity of the liquid polymer material, the high-density packed layer is formed on the inner peripheral side of the uniform dispersion layer.
- an elastic cylinder in which the filler is substantially uniformly dispersed throughout can be obtained.
- the high-density packed layer is formed on the outer peripheral surface side, if the high-density packed layer is removed to expose the uniformly dispersed layer on the surface, the surface hardness will be increased even if the outer surface is further removed. Does not drop. As a result, it becomes easy to set physical properties such as hardness.
- the thickness of the high-density packed layer is 15% or less (but not including 0%) of the thickness of the cylinder. is there.
- the yield is improved.
- the thickness of the dense packing layer is not more than 2% of the thickness of the entire cylinder.
- the removing step may include removing the outer circumferential surface or the inner circumferential surface of the cylindrical body by at least an amount corresponding to Z represented by the following formula [1]: Is removed.
- tgp (s) is the time until the mixture gels
- Dp (mm) is the 80 cumulative weight% particle size of the filler
- P is the specific gravity of the liquid polymer material
- r (mm) is the inner radius of the cylindrical body
- Nt (r pm) is the rotation speed of the mold at time t in the centrifugal molding step.
- the thickness of the dense packing layer is closely related to the distance that the packing moves by centrifugal molding.
- the amount of removal of the high-density packed layer is smaller than the amount of the thickness corresponding to Z, a layer densely filled with the filler will remain in the completed elastic cylinder, and the entire packing material will be filled. This is not preferable because there is a possibility that a cylinder in which the particles are substantially uniformly dispersed may not be obtained.
- the rotational speed Nt of the centrifugal molding may be kept constant throughout, or the rotational speed Nt may be changed in the middle.
- the rotational speed Nt of the mold is changed during centrifugal molding, the rotational speed can be changed stepwise or continuously.
- the value of each variable is generally in the following range.
- the time until the mixed solution gels is the gel point determined from the inflection point of the one-hour viscosity diagram.
- Dp 1 X 10-5mm ⁇ 5 X 10-2mm
- the “80 cumulative weight% particle size” is the particle size of particles equivalent to 80% by weight when the particle size distribution is measured.
- the particle size of under the particles size or less means that occupy 80 weight 0/0 of the total grain.
- ⁇ represents the viscosity of the medium.
- the actual centrifugal molding is performed with a liquid mixture of a liquid polymer material and a filler, but when considering the movement of the filler in the liquid mixture, the medium is the mixture liquid without the filler. Therefore, it was defined as the viscosity of the liquid polymer material at time t when heated under the same conditions as the centrifugal molding.
- the centrifugal molding is performed under conditions satisfying the following formulas [3] and [4].
- T (mm) is the thickness of the cylindrical body
- tgp (s) is the time until the mixture gels
- R (mm) is the inner radius of the mold
- Nt (r pm) is the rotational speed of the mold at time t in the centrifugal molding step
- Dp (mm) is the 80 cumulative weight of the filler. /. Particle size
- pp is the specific gravity of the filler
- P is the specific gravity of the liquid polymer material
- r (mm) is the inner radius of the cylindrical body
- the present invention specifies preferred conditions for centrifugal molding.
- Equation [3] shows the condition for voids having a diameter of 0.2 mm or more to escape from the cylindrical body by centrifugal molding.
- the reason for focusing on the 0.2 mm or more poid is that if a 0.2 mm or more poid is included in the product targeted by the present invention, the function as the product may be impaired.
- Equation [4] shows the conditions for the high-density packed bed to have a preferable thickness in the cylinder formed by the centrifugal molding process.
- the distance that the filler moves in the radial direction by centrifugal molding can be theoretically approximated by Y as described above.
- the thickness of the high-density packed layer that needs to be removed in the removal process can be reduced to 15% or less of the thickness of the cylindrical body created by the centrifugal molding process. Was. Therefore, the yield is improved by doing so. More preferably, Y ⁇ TZ10, and even more preferably, ⁇ / 20. In the case of misalignment, the thickness of the high-density packed layer could be less than 10% of the thickness of the cylinder.
- the thickness of the cylinder created by the centrifugal molding process is generally 5mn! It is about 50 mm.
- the rotational speed Nt of the mold may be constant throughout the centrifugal molding process as long as the above condition is satisfied, or may be changed stepwise or continuously in the middle.
- the mixed liquid be defoamed before being poured into the mold, so that voids can be more reliably removed.
- a method for producing an elastic cylindrical body comprising: injecting a mixed solution containing a liquid polymer material and a filler into a mold for centrifugal molding;
- the present invention relates to a method for producing a cylindrical body in which the filler is dispersed.
- the centrifugal molding is performed under the conditions satisfying the following formulas [7] and [8].
- T (mm) is the thickness of the cylindrical body
- tgp (s) is the time until the mixture gels, Is the specific gravity of the mixture,
- R (mm) is the inner radius of the mold
- Nt (r p m) is the number of revolutions of the mold at time t in the centrifugal molding step
- Dp (mm) is the 80 cumulative weight% particle size of the filler
- PP is the specific gravity of the filler
- P is the specific gravity of the liquid polymer material
- r (mm) is the inner radius of the cylindrical body
- the present invention defines particularly preferred conditions for centrifugal molding.
- the skin layer When the skin layer is formed, it can be easily removed by a known method such as cutting or plasting.
- the above-described removal step is not necessarily required. However, even in this case, it is preferable to perform surface processing such as cutting and blasting in order to obtain predetermined dimensional accuracy and surface accuracy.
- the filler is almost uniformly dispersed throughout the entire surface without using a very dense skin layer or forming a densely packed layer.
- An elastic cylinder can be obtained.
- the thickness of the high-density packed bed could be made to be 2% or less of the thickness of the cylindrical body.
- the 80 cumulative weight% particle size [DP] is in the range of 0.01 ⁇ to 20 ⁇ .
- voids can be removed and the high-density filling layer can be easily thinned.
- the 80% cumulative weight% particle size of the filler is less than 0.1 ⁇ , the viscosity of the liquid mixture obtained by mixing the liquid polymer material with a predetermined ratio of the filler becomes too high, resulting in centrifugal molding. Also, there is a possibility that the removal of voids becomes difficult.
- a particularly preferred range of the / 0 particle size is from 1.0 m to 5.0 ⁇ .
- Fillers having an 80% by weight cumulative particle size of 1.0 ⁇ m or more are easily available. Further, by setting the 80 cumulative weight% particle diameter to 5 or less, the thickness of the high-density packed layer can be particularly reduced.
- the centrifugal forming step includes: an A step of removing a void from the liquid polymer material; and a step of suppressing movement of the filler in a radial direction.
- Step B for curing the polymer material is included at least.
- Step A and step B can be distinguished by, for example, changing the number of revolutions, temperature, pressure, etc. during the centrifugal molding step.
- the step B is performed at a lower rotation speed than the step A.
- the rotation speed of the mold When the rotation speed of the mold is changed during the centrifugal molding step, the rotation speed may be changed stepwise to a predetermined rotation speed.
- the rotational speed of the mold When the rotational speed of the mold is changed during the centrifugal molding process, the rotational speed of the mold may be continuously changed.
- the rotational speed of the mold is kept constant through the centrifugal molding step.
- the rotational speed of the mold may be kept constant without being changed during the centrifugal molding step.
- voids can be removed even if the mold rotation speed is kept constant through centrifugal molding. It is possible to achieve both, and to make the dense packing layer thinner. In this case, the manufacturing process can be simplified.
- a mixed solution containing a liquid polymer material and a filler is injected into a mold for centrifugal molding, and then subjected to centrifugal molding.
- a cylindrical body including a dense packing layer is formed. The high-density filling layer is removed to expose the uniform dispersion layer on the surface.
- the above-mentioned cylindrical body is covered on the outside of the core before or after the above-mentioned removing step, and the cylindrical body and the above-mentioned core are integrated.
- the removal step must be performed before the step of integrating the cylindrical body and the core material.
- either of the removing step and the step of integrating the cylindrical body and the core material may be performed first.
- the inner peripheral surface of the cylindrical body is integrated with the core material, and the outer peripheral surface of the cylindrical body is integrated before or after integration with the core material to obtain the desired dimensional accuracy and surface accuracy.
- Surface processing such as cutting and blasting is performed to obtain the surface. The removal during this surface processing A step may be included.
- the method for producing an elastic roll according to an eleventh aspect of the present invention is directed to a method for injecting a mixed solution containing a liquid polymer material and a filler into a mold for centrifugal molding and performing centrifugal molding.
- a cylindrical body in which the filler is dispersed is created.
- the cylindrical body and the core material are integrated by covering the cylindrical body on the outside of the core material.
- the centrifugal molding is performed under conditions satisfying the following formulas [11] and [12].
- T (mm) is the thickness of the cylindrical body
- tgp (s) is the time until the mixture gels
- R (mm) is the inner radius of the mold
- Nt (r pm) is the rotational speed of the mold at time t in the centrifugal molding step
- Dp (mm) is the 80 cumulative weight% particle size of the filler
- PP is the specific gravity of the filler
- r (mm) is the inner radius of the cylindrical body
- Ait indicates the viscosity of the liquid polymer material at time t when heated under the same conditions as the centrifugal molding.
- the skin layer When the skin layer is formed, it can be easily removed by a known method such as cutting or plasting.
- the skin layer When the skin layer is formed on the inner peripheral surface side of the cylindrical body, it must be removed before the step of integrating the cylindrical body and the core material, but the skin layer is formed on the outer peripheral surface side of the cylindrical body. In this case, either of the step of removing the skin layer and the step of integrating the cylindrical body and the core material may be performed first.
- the above-described removal step is not necessarily required. However, even in this case, it is preferable to perform surface processing such as cutting and blasting in order to obtain predetermined dimensional accuracy and surface accuracy.
- the elastic roll is a papermaking calender roll.
- the production method of the present invention is particularly effective when applied to the production of large rolls, in particular, calender rolls for papermaking.
- An elastic cylinder according to a thirteenth aspect of the present invention relates to an elastic cylinder obtained by centrifugal molding, comprising a polymer material and a filler.
- the difference between the hardness of the outer surface and the hardness of the inner surface is within 2 degrees (JISD), and the difference in hardness per lmm in the thickness direction is within 1 degree (JISD).
- the hardness does not decrease even after cutting or polishing. It does not contain voids on the surface and inside.
- the elastic cylindrical body according to the present invention has excellent surface characteristics by being put on the outside of the core material and being integrated with the core material, can avoid stress concentration inside the elastic cylindrical body and damage due to internal heat generation, and has stable hardness. Elastic roll.
- the difference between the hardness of the outer surface and the hardness of the inner surface is within 1 degree, and the difference in hardness per 1 mm in the thickness direction is 0 degree.
- An elastic cylinder according to a fifteenth aspect of the present invention relates to an elastic cylinder fc containing a polymer material and a filler, and obtained by centrifugal molding. Ash on the outer surface and ash on the inner surface The difference between the ash content and the ash content per l mm in the thickness direction is within 10%. According to the present invention, voids are not included on the surface and inside.
- the difference between the ash on the outer surface portion and the ash on the inner surface portion is within 10%, and the difference in ash per lmm in the thickness direction is within 0.5%. is there.
- An elastic roll according to a fifteenth aspect of the present invention relates to an elastic roll including a core, and an elastic cylinder positioned outside the core and integrated with the core.
- the elastic cylinder includes a polymer material and a filler, and is an elastic cylinder obtained by centrifugal molding.
- the difference between the hardness of the outer surface and the hardness of the inner surface is within 2 degrees (JISD), and the difference in hardness per lmm in the thickness direction is within 1 degree (JISD). According to the present invention, no void is included on the surface or inside.
- An elastic roll according to a sixteenth aspect of the present invention relates to an elastic roll including a core material, and an elastic cylinder positioned outside the core material and integrated with the core material.
- the elastic cylinder includes a polymer material and a filler, and is an elastic cylinder obtained by centrifugal molding.
- the difference between the ash on the outer surface and the ash on the inner surface is within 20%, and the difference in ash per lmm in the thickness direction is within 10%.
- voids are not included on the surface and inside.
- the elastic roll is a papermaking calender roll.
- Examples of the polymer material used in the present invention include epoxy resin, polyurethane, polyisocyanurate, crosslinked polyesteramide, unsaturated polyester, and diaryl phthalate resin.
- epoxy resins and crosslinked polyesteramides are preferred from the viewpoints of durability, heat resistance, and moldability, and the use of epoxy resins is particularly preferred.
- fillers used in the present invention carbon black, silica, alumina, titanium oxide, aluminum hydroxide, calcium carbonate, clay, barium sulfate, zinc oxide, magnesium hydroxide, glass beads, resin beads and the like are commonly used. Granular fillers.
- the mixing ratio of the filler is 1 0-6 0 weight 0/0 approximately in the whole mixture.
- pigments, plasticizers and the like may be appropriately blended.
- FIG. 1 is a cross-sectional view of a centrifugal molding device used in the present invention
- FIG. 2 is a cross-sectional view taken along the line ⁇ in FIG.
- a cylindrical mold 11 having a predetermined dimension is arranged in the chamber 10 such that the force axis is in the horizontal direction.
- One end of the mold 11 is connected to an external drive mechanism (the drive unit 12 and the drive shaft 13), and the mold 11 can be rotated around the axis at an arbitrary rotation speed.
- the lower part of the mold 11 is supported by a plurality of support rollers 14.
- a casting tube 16 extends from the external casting machine 15 to the interior of the mold 11.
- the temperature inside the chamber 110 can be controlled so that the liquid polymer material can be cured by heating.
- liquid polymer material, the filler, and other compounding agents to be added as desired are mixed and stirred to prepare a mixed liquid containing the liquid polymer material and the filler.
- the mixture is poured into the mold 11 from a casting machine 15 through a casting tube 16.
- the temperature and the number of rotations of the mold 11 are controlled to predetermined values, and the polymer material is primarily heated and cured while the mixed solution is pressed against the inner surface of the mold 11 by centrifugal force.
- air bubbles having a specific gravity are removed from the inner peripheral surface of the mixed solution.
- the polymer material has already gelled into a cylindrical body, so the filler does not move in the subsequent steps.
- the polymer material is secondarily heated to improve the physical properties of the cylindrical body.
- the mold 11 and the cylinder are naturally cooled while the rotation of the mold 11 is stopped or kept rotating, and then the cylinder is taken out of the mold 11.
- the cylinder is tertiary-heated in another furnace to further improve the physical properties of the cylinder.
- the removing step will be described.
- the high-density packed layer 1 is formed on the outer peripheral surface side of the uniform dispersion layer 2.
- the high-density packed layer 1 is formed on the inner peripheral surface side of the uniform dispersion layer 2. . .
- the amount to be removed may be at least a thickness corresponding to Z represented by the above formula [1].
- the removal step becomes unnecessary, and referring to FIG. 4, without forming a high-density packed layer, the elastic material in which the filler is substantially uniformly dispersed throughout A cylindrical body can be obtained.
- the thickness of the dense packing layer can generally be confirmed by an electron micrograph of a cross section of the cylindrical body.
- the production method according to the present invention is particularly suitable for producing large-sized rolls and hard elastic rolls.
- a pallet is, for example, a calender pallet for papermaking.
- outer cylinder 5 is fitted over metal roll core 3 having fiber-reinforced lower winding layer 4 and formed between lower winding layer 4 and cylinder 5. It is possible to inject an adhesive into the formed annular gap, cure it at a predetermined temperature, and join and integrate the lower winding layer 4 and the cylindrical body 5 via the adhesive layer 6.
- Samples 1 to 11 were prepared in the following procedure, and experiments were performed. Sample 1
- Bisphenol A type epoxy resin (epoxy equivalent 180-200 g / eq) 100 parts by weight, curing agent (modified aromatic polyamine: amine equivalent 50-70 gZe q) 27.
- Phosphorous silica (80 cumulative weight / .particle size 4.5 ⁇ ) 38.5 parts by weight was mixed and stirred to prepare a mixed solution.
- a mold for centrifugal molding was prepared with an inner radius of 130 mm and an inner surface length of 34.5 mm. With the mold heated to an internal temperature of 70 ° C., the mixture was poured into the mold from a casting machine while rotating at a rotation speed of 1,000 rpm.
- the primary heating was performed by a process A for removing voids by relatively high-speed rotation and a process B for hardening the polymer material while suppressing radial movement of the filler by relatively low-speed rotation. That is, while maintaining the temperature inside the mold at 70 ° C, 1 hour from the start of casting to 360,000 seconds at 1 000 rpm (Process A), and then from 360,000 seconds to 1440,000 The rotation speed was reduced to 300 rpm for 3 hours until the second (step B). Subsequently, as the secondary heating, the temperature inside the mold was set to 120 ° C., and the number of revolutions was set to 3 (30 rpm at 1440 to 2600 seconds for 2 hours. After the inside of the mold was naturally cooled at a rotational speed of 300 rpm, the cylindrical body was taken out of the mold.
- the thickness of the cylinder (T), the specific gravity of the filler (pp), the specific gravity of the resin (p), the specific gravity of the mixture (pM), and the inner radius of the cylinder (r) are shown in Tables 1, 2, and 3. As described.
- the hardness (type D durometer hardness defined in JIS K6253) and ash content (%) (measuring device name “TGZDTA 220” manufactured by Seiko Denshi Kogyo Co., Ltd.) It was measured. The measurement results are shown in the graph of FIG. Furthermore, while cutting in the axial direction from the outer peripheral surface of the cylindrical body, the presence or absence of voids was visually checked each time the thickness was reduced by 1 mm, but no voids were found inside the surface of the cylindrical body. Did not.
- the thickness of the high-density packed layer was examined for samples 1 to 5 and 8 to 11 where no voids were found.
- the ratio (h / T) of the thickness h of the high-density packed bed to the thickness T of the entire cylindrical body was calculated based on the observation results by electron micrographs. Because of the following, the yield can be expected to be improved by reducing the amount of removal compared to the conventional manufacturing method without centrifugal molding. In particular, the yield of the sump ⁇ ⁇ 2 ⁇ 5, 8, and 9 was 2% or less, so the effect of improving the yield was significant. On the other hand, samples 10 and 11 that do not satisfy the above formula [4] exceeded 15%, so that an improvement in yield cannot be expected.
- Samples 1 to 9 show that the filler is almost uniformly dispersed throughout the obtained elastic cylinder. In particular, samples 3 to 5, 8, and 9 show little difference in hardness and ash (%) in the thickness direction. On the other hand, in Samples 10 and 11, even if 15% of the thickness of the entire cylindrical body was removed, the dispersion ratio of the filler was not uniform in the thickness direction.
- Figures 6 to 14 show the measurement positions and gray levels of samples 1 to 11 (excluding samples 6 and 7). The relationship between minute and hardness is shown.
- the measurement position O mm indicates the outer surface of the dense packing layer. 4.
- Samples 1 to 5, 8, and 9 that satisfy the above formulas [3] and [4] can remove voids and reduce the thickness of the high-density packed bed by the thickness of the cylinder formed by the centrifugal molding process. 15% or less.
- Samples 4, 5, 8, and 9, which satisfy Equations [7] and [8] can remove the the the, and can form a dense packing layer with the thickness of the cylinder formed by the centrifugal molding process. Only 1% or less of the skin layer was obtained.
- the yield is improved.
- voids can be removed and physical properties such as hardness can be stabilized.
- local stress concentration and internal heat generation can be prevented, and durability can be improved.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulding By Coating Moulds (AREA)
- Rolls And Other Rotary Bodies (AREA)
- Paper (AREA)
- Springs (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Description
Claims
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE60137344T DE60137344D1 (de) | 2000-09-05 | 2001-08-13 | Verfahren zur herstellung eines zylinderförmigen elastischen körpers |
US10/363,531 US6983540B2 (en) | 2000-09-05 | 2001-08-13 | Method for manufacturing elastic cylindrical body and method for manufacturing elastic roll |
EP01956869A EP1316401B1 (en) | 2000-09-05 | 2001-08-13 | Method for manufacturing elastic cylindrical body |
AU2001278723A AU2001278723C1 (en) | 2000-09-05 | 2001-08-13 | Method for manufacturing elastic cylindrical body, method for manufacturing elastic roll, elastic cylindrical body, and elastic roll |
CA002419721A CA2419721C (en) | 2000-09-05 | 2001-08-13 | Method for manufacturing elastic cylindrical body, method for manufacturing elastic roll, elastic cylindrical body and elastic roll |
KR1020037002871A KR100752488B1 (ko) | 2000-09-05 | 2001-08-13 | 탄성 원통체의 제조 방법, 탄성 롤의 제조 방법, 탄성원통체 및 탄성 롤 |
AU7872301A AU7872301A (en) | 2000-09-05 | 2001-08-13 | Method for manufacturing elastic cylindrical body, method for manufacturing elastic roll, elastic cylindrical body, and elastic roll |
US11/108,783 US20050181920A1 (en) | 2000-09-05 | 2005-04-19 | Method of manufacturing elastic cylindrical body, method of manufacturing elastic roll, elastic cylindrical body and elastic roll |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000268520A JP3377780B2 (ja) | 2000-09-05 | 2000-09-05 | 弾性円筒体の製造方法、弾性ロールの製造方法、弾性円筒体および弾性ロール |
JP2000-268520 | 2000-09-05 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/108,783 Division US20050181920A1 (en) | 2000-09-05 | 2005-04-19 | Method of manufacturing elastic cylindrical body, method of manufacturing elastic roll, elastic cylindrical body and elastic roll |
Publications (1)
Publication Number | Publication Date |
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WO2002020237A1 true WO2002020237A1 (fr) | 2002-03-14 |
Family
ID=18755292
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2001/006992 WO2002020237A1 (fr) | 2000-09-05 | 2001-08-13 | Procede de fabrication d'un corps cylindrique elastique, procede de fabrication d'un rouleau elastique, corps cylindrique elastique, et rouleau elastique |
Country Status (10)
Country | Link |
---|---|
US (2) | US6983540B2 (ja) |
EP (3) | EP1872923B1 (ja) |
JP (1) | JP3377780B2 (ja) |
KR (1) | KR100752488B1 (ja) |
CN (2) | CN100515712C (ja) |
AT (2) | ATE503620T1 (ja) |
AU (2) | AU7872301A (ja) |
CA (1) | CA2419721C (ja) |
DE (2) | DE60137344D1 (ja) |
WO (1) | WO2002020237A1 (ja) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050137071A1 (en) * | 2003-12-23 | 2005-06-23 | Cormier Steven O. | Plastic sleeve for an image cylinder and a method for producing the plastic sleeve |
US20050136206A1 (en) * | 2003-12-23 | 2005-06-23 | Cormier Steven O. | Multi-layered plastic sleeve for a blanket cylinder and a method for producing the multi-layered plastic sleeve |
EP2086734A4 (en) * | 2006-11-03 | 2011-05-04 | R & D Green Materials Llc | PROCESS FOR PREPARING BIODEGRADABLE ARTICLES |
CN100569480C (zh) * | 2007-08-10 | 2009-12-16 | 韶关市蓝滤科技实业有限公司 | 一种玻璃钢辊筒 |
JP4653204B2 (ja) * | 2008-09-16 | 2011-03-16 | 住友ゴム工業株式会社 | 導電性ロール |
DE102008042684A1 (de) * | 2008-10-08 | 2010-04-15 | Voith Patent Gmbh | Walze |
US20100282400A1 (en) * | 2009-05-05 | 2010-11-11 | Chandra Sekar | Methods for manufacturing a paint roller and component parts thereof |
US8142599B2 (en) * | 2009-01-08 | 2012-03-27 | Chandra Sekar | Methods for manufacturing a paint roller and component parts thereof |
DE102012205227B3 (de) * | 2012-03-30 | 2013-04-11 | Voith Patent Gmbh | Verfahren zur Herstellung eines Walzenbezugs und Walzenbezug |
US10722997B2 (en) * | 2012-04-02 | 2020-07-28 | Thomas West, Inc. | Multilayer polishing pads made by the methods for centrifugal casting of polymer polish pads |
US10022842B2 (en) | 2012-04-02 | 2018-07-17 | Thomas West, Inc. | Method and systems to control optical transmissivity of a polish pad material |
SG10201608125WA (en) | 2012-04-02 | 2016-11-29 | Thomas West Inc | Methods and systems for centrifugal casting of polymer polish pads and polishing pads made by the methods |
SG11201610107TA (en) * | 2014-06-05 | 2017-01-27 | Thomas West Inc | Centrifugal casting of polymer polish pads |
CN105014855A (zh) * | 2015-06-19 | 2015-11-04 | 李国峰 | 一种高粘稠物质模具内成形技术 |
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- 2001-08-13 CN CNB2004100699671A patent/CN100515712C/zh not_active Expired - Lifetime
- 2001-08-13 AU AU7872301A patent/AU7872301A/xx active Pending
- 2001-08-13 EP EP07017141A patent/EP1872923B1/en not_active Expired - Lifetime
- 2001-08-13 EP EP01956869A patent/EP1316401B1/en not_active Expired - Lifetime
- 2001-08-13 US US10/363,531 patent/US6983540B2/en not_active Expired - Lifetime
- 2001-08-13 AT AT07017141T patent/ATE503620T1/de active
- 2001-08-13 EP EP06023564A patent/EP1759825A3/en not_active Withdrawn
- 2001-08-13 DE DE60137344T patent/DE60137344D1/de not_active Expired - Lifetime
- 2001-08-13 AT AT01956869T patent/ATE419966T1/de active
- 2001-08-13 KR KR1020037002871A patent/KR100752488B1/ko not_active IP Right Cessation
- 2001-08-13 AU AU2001278723A patent/AU2001278723C1/en not_active Ceased
- 2001-08-13 WO PCT/JP2001/006992 patent/WO2002020237A1/ja active IP Right Grant
- 2001-08-13 CA CA002419721A patent/CA2419721C/en not_active Expired - Fee Related
- 2001-08-13 DE DE60144351T patent/DE60144351D1/de not_active Expired - Lifetime
- 2001-08-13 CN CNB018151663A patent/CN1206091C/zh not_active Expired - Fee Related
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Also Published As
Publication number | Publication date |
---|---|
ATE419966T1 (de) | 2009-01-15 |
EP1872923B1 (en) | 2011-03-30 |
CA2419721C (en) | 2007-11-27 |
JP3377780B2 (ja) | 2003-02-17 |
EP1872923A1 (en) | 2008-01-02 |
CN100515712C (zh) | 2009-07-22 |
AU2001278723B2 (en) | 2005-03-17 |
EP1316401A1 (en) | 2003-06-04 |
EP1316401A4 (en) | 2006-01-11 |
JP2002079528A (ja) | 2002-03-19 |
EP1759825A2 (en) | 2007-03-07 |
CN1460055A (zh) | 2003-12-03 |
US20040023767A1 (en) | 2004-02-05 |
US6983540B2 (en) | 2006-01-10 |
KR20030046420A (ko) | 2003-06-12 |
EP1316401B1 (en) | 2009-01-07 |
KR100752488B1 (ko) | 2007-08-28 |
DE60137344D1 (de) | 2009-02-26 |
CN1206091C (zh) | 2005-06-15 |
CN1569435A (zh) | 2005-01-26 |
US20050181920A1 (en) | 2005-08-18 |
DE60144351D1 (de) | 2011-05-12 |
AU2001278723C1 (en) | 2005-09-22 |
AU7872301A (en) | 2002-03-22 |
EP1759825A3 (en) | 2007-12-19 |
CA2419721A1 (en) | 2003-02-13 |
ATE503620T1 (de) | 2011-04-15 |
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