KR960004252B1 - Urethane roll - Google Patents

Abstract

The urethane roll is used for dewatering paper making web and its support felt. It improves the manufacturing efficiency and the quality of the drafting paper. It comprises the ebonite layor(5), formed in between a steel core(3) and the urethane(4), having a thickness of 25% of the conventional urethane covering layor; the steel core(3) adhered to a rubber valcanized bonding agent.

Description

Urethane Roll with Metal Powder Filled Ebonite Layer

1 is a cross-sectional view of the urethane coating roll of the present invention.

2 is a cross-sectional view of a conventional urethane coating roll.

3 is an embodiment view of the coating roll used in the paper machine press unit.

4 is an embodiment of a method for forming a metal powder ebonite layer in the urethane coating roll of the present invention.

5 is a urethane template after the molding of the metal powder ebonite layer of the present invention.

Figure 6 (a) is a heat transfer phenomenon generated during the use of the present invention.

(b) is the temperature change state generated during use of the present invention.

(c) is a state of temperature change generated during conventional use.

* Explanation of symbols for main parts of the drawings

1: roll 2: axis

3: iron core 4: urethane

5: ebonyite layer

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a urethane roll having a metal powder-filled ebonite layer used when processing a workpiece using high pressure in the papermaking, steelmaking, and textile industries.

Urethane rolls are used to remove the water contained in wetlands called webs for paper and the felt that supports them. Recently, the urethane rolls are produced by increasing the yield of paper in order to improve the productivity and quality of papermaking. And energy savings.

In the conventional paper urethane rolls, the roll structure used in the press portion is composed of a shaft having a high rigidity or a drive shaft with holes for supporting internal water cooling on both sides of a steel pipe, and a bearing supporting the bearing on the opposite side thereof. On the iron core, urethane is coated and two or three rolls are installed in parallel, and the roll is pressurized and rotated between the rolls by a pressure device to continuously dehydrate.

When urethane rolls used in such structures are repeatedly pressurized by the structural characteristics of the raw material of urethane, the heat generation in the urethane coating layer is increased due to the exothermic phenomenon and the low thermal conductivity of the urethane. The product becomes unusable.

In order to prevent the heat generation and melting of the urethane, each urethane roll manufacturer and roll user tried to prevent the breakdown of the coating layer by using the glass fiber layer in which the cooling water passes and the synthetic resin (epoxy) inside the roll. The problem is caused by the Blister phenomenon due to temperature variation.

The present invention is to eliminate the above-mentioned drawbacks as described in detail by the accompanying drawings as follows.

Iron cores (3) and urethanes (4) built up in the outlet (2) of the roll (1) used in urethane rolls with an ebonite layer used in the paper, steel and textile industries to process workpieces using high pressure. In the structure in which the ebonite layer 5 is inserted in between, the ebonite layer 5 between the iron core 3 and the urethane 4 is formed in about 25% of the conventional urethane coating layer, and the ebonite layer ( 5) is bonded with a rubber vulcanized adhesive, and the structure between the ebonite layer 5 and urethane is vulcanized and bonded as a urethane adhesive.

In the drawings, reference numerals 6 and 6 'denote an adhesive layer, 7 and 7' a coating table, 8 a non-vulcanized metal powder-filled rubber sheet, and 9 an ebonite layer frame. ) Is mold, (P) is repeated pressurization and (W) is cooling water.

The material of the iron core 3 of the present invention as described above is mounted on a shelf with a round bar made of carbon steel, gray cast iron, stainless steel, aluminum or bronze (this is called iron core) to remove the surface oxide layer with a high strength carbon steel bite, and then to the core 3 and the adhesive layer. (6) (6 ') and the rubber vulcanizing adhesive (CHEMLOK 205,226) when the surface treatment is completed by removing the irregularities and contaminants on the surface of the iron core by pressing a piece of metal to the iron core surface with high pressure air to improve the adhesion. After coating and drying, the iron core (3) on which the adhesive is applied is installed on the cover (7) (7 '), and the unvulcanized metal powder-filled rubber sheet (8) is rolled up to 8 mm, rolled up, and then the coating is completed. The vulcanized lapping tape is wound around the entire coating layer and vulcanized in a vulcanizing tube. After the vulcanized roll (1) is completely cooled in the air, it is placed on a shelf and processed into bite-processed metal powder. Apply the urethane adhesive (CONAP 1146C) to the surface of the source ebonite layer frame (9), install the urethane mold mold (10), put it in an oven and preheat it to 100 ° C for 10 hours. -100) and the curing agent (WAKAYAMA CUAMINE M) at a mixing ratio of 100: 11.5, vacuum degassing the mold at the molding machine, and then, when the mold is completed, the mold is put back into the oven and cured at 100 ° C for 10 hours, then taken out and cooled, The structure is completed by placing (1) on the shelf and processing and polishing the bite according to the standard. The damage of the expensive urethane roll which can prevent the meltdown of the urethane roll having the ebonite layer of the present invention by the internal heat generated during the use in the conventional papermaking, steelmaking, and industrial machinery is prevented to improve the quality and It contributes to cost reduction. Or embodiments for supplementing the effects of the present invention are as follows.

Example 1

Urethane Roll with Metal Powder Filled Ebonite Adhesive Layer (Natural Rubber Ebonite)

Iron core size: Ø 460mm, face length: 2675mm, material: FC 35

2. Urethane content: Hardness HS (A) 90, Urethane coating size Ø 500mm

Water Resistant Urethane

3. Usage: Keesung Paper Co., Ltd.

4. Product Name: Pressure Roll

5. Production

5.1. Iron core surface treatment: Geumgangsa 100 mesh

5.2. Glue: Primer CHEMOLOK 205

Cement CHEMOLOK 220

5.3. Metal Powder Filled Ebonite Blend (Unit: PHR)

Natural Rubber (SMR-L) 100.0

ZNO (Han Chemical No. 2) 5.0

Stearic Acid 1.0

Marvel (3)

Aromatic Softener 7.0

Vander bilt 30.0

Sulfur (non-cylindrical) 38.0 for rubber

Accelerator DPG 1.0

Aluminum powder (AAL200 chang sung) 50.0

5.4. Coating Vulcanization of Metal Powder Filled Ebonite Blends

1 sheath: outer diameter Ø 476mm

2 Lapping: cotton tape 4ply

3 Vulcanization: Steam Vulcanizer, Steam Pressure 3.5 ㎏ / ㎠ × 12 hours

5.5. Roughing of Metal Powder Filled Ebonite Blends

Ø 470mm

5.6. Glue Promotion and Preheat

1 Glue Board CHEMLOK 218

2 preheating 110 ℃ × 10 hours

5.7. Urethane mold

1 Raw material: Uniroyal Adiprene L-100: 100

2 Curing agent: WAKAYAMA CUAMINE M: 11.5

3 Defoaming of raw materials 80 ℃ × 2 hours × 130mm hg

4 Mold size: Ø 516 mm

5.8. Urethane curing

1 curing: 110 ℃ × 10 hours

5.9. Polishing urethane layer after curing

Ø500 × 2675mm

6. Usage

6.1. Lifespan of conventional rolls: 3 months

6.2. Lifespan of rolls produced by development: 15 months

Example 2

Urethane Roll with Synthetic Rubber Filled Ebonite Adhesive Layer (Synthetic Rubber Ebonite)

Iron core standard: Ø 260 face length 300mm material SS 41

2. Urethane content: Hardness HS (A) 90 ° Urethane coating size Ø300

Water Resistant Urethane

3. Usage: Instructor durability test rate

4. Production

4.1. Iron core surface treatment: Geumgangsa 100mesh

4.2. Adhesive Primer CHEMLOK 205

Cement CHENLOK 220

4.3. Metal Powder Ebonite Formulation (Unit PHR)

Acrylonitile Butadienl Rubber

(Nipol n-32, Zeon) 100

(Hanil Chemical No. 2) 5

Stearic Acid 1.0

Marvel (3)

DOP (Three Curing Chemicals) 8.0

Aluminum silicate (Vanderbilt) 30.0

Sulfur (Rubber) 35.0 for rubber

Accelerator DPG 1.0

Aluminum Powder (AAL 200, Ju, Changsung) 50.0

4.4. Coating of Metal Powder Filled Ebonite Blends, Vulcanized

1 Sheath: Outer DiameterØ276mm

2 Lapping: 4ply cotton tape

3 Vulcanization: Steam Vulcanizer, Sum of Steam 3.5㎏ / ㎠ × 12 hours

4.5. Roughing of Metal Powder Filled Ebonite Blends

Ø270mm

4.6. Adhesive application and preheat

1 Glue application CHEMLOK 218

2 preheating 110 ℃ × 10 hours

4.7. Urethane mold

1 raw material: Mitsui Toatsu Chemical

Hiprene L 100 100

2 Hardener: Wakayama Kuamine M 11.5

3 Defoaming of raw material: 80 ℃ × 2 hours × 18mm Hg

4 Driving specification: Ø310mm

4.8. Urethane Curing: 110 ℃ × 6 hours

4.9. Polishing urethane layer after curing

Ø300 × 300

5. Hardening of use (comparison experiment between existing production method and development roll)

5.1. Exam conditions

1 Tester: Durability Tester (new work)

2 Method: Press the test rate pressure on the reference roll to stop after a certain period of time to measure the temperature of the test rate surface

3 Test Condition: PPM 250

Face rock (㎏ / ㎡): 50

Trial Run Time: 8HRS

Through coolant inside roll: 41 / min, 18 ℃

5.2. Test results (surface temperature measurement after stop)

Claims (1)

Iron core (3) and urethane (4) laid on shaft (2) of roll (1) used in urethane rolls having an ebonite layer used for processing rework using high pressure in the paper, steel and textile industries In the structure in which the ebonite layer 5 is inserted in between, the ebonite layer 5 between the iron core 3 and the urethane 4 is formed in about 25% of the conventional urethane coating layer, and the iron core 3 and the ebonite layer ( 5) "Rolls with metal powder-filled ebonite layer", characterized in that it is bonded with a rubber vulcanized adhesive and vulcanized-bonded as an urethane adhesive between the ebonite layer 5 and urethane.