JPS58149413A - Roll to which elastic film is formed and its manufacture - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The invention relates to a roll provided with an elastic coating according to the preamble of claim (1).

In industry, for example in the paper, steel and textile industries, as well as in the printing industry, large numbers of rolls are required, the iron core of which is covered with a soft, usually elastic rubber or plastic coating. The coating is applied to the O-L core rod by casting, rolling, or spraying. In order to obtain excellent adhesion with the roll 8 bar, the roll 8 bar was cleaned and degreased).

Sandblasting and adhesive must be applied to ensure a strong adhesion to the coating so that it will not peel off even under the influence of heat. Depending on the material, for example in the case of polyurethane, the roll 8 rod and tool should be
It is necessary to warm it to 00℃. Various coating materials, such as elastomers, must be exposed to a temperature of 170° C. in the furnace for several hours after application in order to proceed with the chemical treatment process. In many cases, further aging at a constant temperature of 25° C. is required thereafter. This aging period may require three weeks depending on the material and film thickness.

This expensive and equipment-complex method of directly coating roll 8 bars requires each company to deliver rolls that require renewal to a coating factory. This causes production to be halted and, since the roll 8 bar 11i1 is very heavy, the tonnage increases, its length often reaches 6Il, and the transportation volume becomes large and expensive.

For several years, attempts have been made to produce coatings, also called manchons, which can be applied on-site and therefore also allow defective coatings to be replaced in a short time. Experiments have confirmed whether elastomer or plastic manure can be applied to the roll 8 bar. Sufficient adhesion could not be obtained due to the difference in material between plastic and steel and the large load (roll load and rotation speed) on the roll during use. Even if a soft and partially elastic manchun is pressed, the pressing force will loosen in a short time, and the adhesion to the roll 8 rod will be completely lost. Obviously, pressing is therefore only possible in the case of relatively short mantunes.

For the above reasons, an attempt was made to manufacture an exterior manchun.

In this case, for example, nets or perforated plate cylinders were embedded in the coating material. Since the coating material in this case penetrates the exterior, the inner part of the manchun is made of the coating material. Although it was possible to partially reduce the loosening of the fixing force during pressing, a problem arose in maintaining tolerances. Furthermore, a difficulty appeared when pressing the manchun against a long cylinder.

Previous developments have been mainly directed to the textile industry. In this case, the spindle and the rolls of small diameter and length must be coated. Applying the known manchun to roll lengths exceeding several 1001 immediately caused great difficulties.

For example, in case of high load (up to pressure #100N/u+2)
, due to the rolling action, manchun is heated significantly (80℃
), and due to the different coefficients of thermal expansion for steel,
It was shown that the roll 8 bar was peeled off.

The above problems do not occur when the coating is directly vulcanized onto the roll 8 bar by conventional methods. This is because thermal shrinkage that causes residual stress does not appear after vulcanization, and the various thermal expansions are balanced during operation.

The object of the invention is to create an elastic coating for rolls which is provided with an outer coating for strength reasons and which provides an inner layer that provides sufficient adhesion to the roll and at the same time allows greater tolerances than conventional coatings. be. This coating can be stored at the user company and can be coated onto rolls in a short time if necessary.
The material must not need to be sent to a coating factory. It is important that the coating adhere completely to the roll no matter how strong the load is applied.

These problems are covered by the scope of claim (1) for this invention.
solved by the features defined in the description.

Embodiments of the present invention will be described in detail below with reference to the drawings.

To construct the membrane, also called munchicon, according to FIG. 1, first an annular base 1 made of polyurethane is cast. The outer periphery of the annular base 1 descends stepwise, and the three annular steps 2, 3.4 have different diameters.

A pipe 5 made of glass fiber-reinforced polyester is used for the interior of the munch 1, and the inner diameter d1 of the pipe is approximately 1 to 5 mm larger than the outer diameter d2 of the steel roll 8 bar 6 to be coated. Polyester pipes are heat stable and never soften at temperatures up to 120°C. This pipe is impermeable and
Moreover, it is completely in close contact with the exterior material 7 of Manchun. Its coefficient of thermal expansion is approximately equal to that of steel (coefficient of thermal expansion of steel: approximately 12.0XIO-'/'C). The heat of polyester pipes! It is desirable that the coefficient is ≦15.0x10(l/'C). The thickness of the pipe wall is 1.5 to 4 mm.
It is.

Instead of glass fiber reinforced polyester pipes, other rigid materials can also be used, for example sheet metal sleeves. However, the manufacture and pretreatment of the sleeve is relatively expensive, and the adhesive bonding between the polyurethane material and the adhesive requires expensive pretreatment. Such measures are not necessary in the case of polyurethane pipes 5. The tube end of the polyester pipe 5 is inserted only into the second annular step 3 of the annular base 1, and the polyester pipe is then used as an immersed formwork. The tube end is
For example, it can be brought into close contact with the annular base 1 using an epoxy adhesive.

The ends of the steel tubes 8 are pushed into the outermost annular step 2 as an outer formwork for the polyurethane cladding. The polyurethane is poured at a temperature of 80-120° C. and combined with the annular base 1. hX for about 8 to 10 hours after pouring
＆ノ [After chemical treatment, exterior 7, reinforced exterior 5, I
A finished manchun consisting of an annular base 1 of -H is punched out from the outer formwork 8. Because of the hot pouring, after cooling, thermal shrinkage occurs, resulting in the sheath becoming taut on the reinforcing sheath.

The manchun is then sent to a utilization factory, where it is stored until use. If desired, the Manchun can be immediately assembled into the O-L core rod as illustratively shown in FIG.

The manchun is embedded in the roll 8 rod 6 until the annular ring 1 touches the front surface 1 of the roller.

The play S between the roll surface and the inner surface of the manchun is 0.5~
It is 2.5 ■. It is desirable that the manchun and roll 8 rods be concentric so that the play, or gap 13, is balanced around the circumference. Now you can stand the munchkin vertically.

'Next, the third stage 4 of the annular base 1 and the roll front surface 10
A hole is pierced through the manchun in the area of the annular space 11 defined by. Through this hole 12, a completely solvent-free polyester-based, epoxy-based or polyurethane-based adhesive is forced into the annular space 11 under a pressure of up to 10 atmospheres. The adhesive must not be permeable and preferably has a viscosity of 2500 Cp or less. The adhesive flows upwardly through the gap 1113 and completely fills the gap.

Subsequent experiments showed that the manchun did not delaminate from the Roll 8 bar, even with more intense loading and heating. Since the polyurethane outer t+7 is pressed under tension against the hard reinforced exterior pipe 5, the tension loosens at most due to heating, but it does not peel off from the reinforced exterior pipe 5. A superior pipe with a coefficient of thermal expansion comparable to an iron core will expand as well as an iron core and therefore will not separate from the core as well. The adhesive, which is pressed in under pressure, ensures a reliable seal between the reinforcing sheath and the O-ring core.

Next, I will summarize the advantages of Manchun mentioned above once again.

The manchun can be attached to the roll 8 bar by the user on site, glued at room temperature, and finally roughened and/or precision ground. Curing of the adhesive takes place within 2-3 hours. There is no need to take the trouble to send the oil back to the coating factory.

The 1-inch munchkin is suitable for covering 8 rolls from small to large sizes.

Manchun is especially close to the iron core, and has the highest degree of 41i.
Resists lJI forces and compressive stresses.

The 7-inch coating can be manufactured in advance and can be maintained by the user, thereby suppressing production decline when renewing the coating and eliminating the burden of transportation costs.

- Expensive pretreatment operations such as sand plasting, adhesive application, etc. can be omitted. The surface of the roll 8 bar does not need to have a special structure, and it is sufficient to roughly grind the surface and finally degrease it. Slight diameter differences are balanced out by the adhesive layer.

Manchun can be produced particularly economically in terms of quality and cost.

For one roll core rod and manchun garden, 0.5~2.5-
Because of the dark play, the manufacturing tolerance requirements are relatively small.

When promoting the chemical treatment of the film, the iron core should be heated at a temperature of 80~80°C.
Must be heated to 170°C.

The manchun should not be pressed against the roll, it can simply be pushed onto the roll without applying any force.

- By using a transparent polyester material for the reinforced exterior vibrator, it is possible to monitor the adhesion status of the polyurethane exterior to the reinforced exterior pipe. Such simple coating management is not possible by direct pouring of the coating onto the roll 8 bar.

- In the case of a roll used as a pressure cylinder for gravure printing, the reinforcing sheathing pipe and the adhesive constitute an electrically insulating layer for the polyurethane sheath and the roll 8 bar.

As is well known, electrostatic printing aids are used in gravure printing to improve printing quality. Previously, the outer conductive layer of a polyurethane coating (for example, obtained by mixing carbon black) had to be poured into the inner insulating polyurethane layer. This expensive and labor-intensive pouring step can be eliminated by this method.

According to another embodiment according to FIGS. 4 and 5, the reinforced sheathing pipe 5 and the steel tube 8 are fitted vertically into the annular slot 14 of the steel plate 15, and between the end of the steel 1!8 and the annular slot 14, Furthermore, a gasket is inserted. Silicone is applied to the annular socket 14 and the inner surface of the steel pipe 8 so that the manchun can be easily removed later.

The flow into the space between the two tubes 5.8 takes place from the bottom upwards through the opening 17 in the top of the steel tube 8. The advantage of this is that the pouring process takes place under precisely controlled supervision, which is particularly important in the case of pre-stressed polyurethane materials. A chemical treatment step is then carried out, also under supervision, from the bottom upwards.

In this case, one of the advantages of the new method is demonstrated.

The known method of pouring the sheath directly onto the D-rule mandrel created a risk of cracking and debonding due to thermal and shrinkage stresses due to uneven cooling.

Depending on the size and volume of the roll 8 bars, it was necessary to calculate what effect the various heat potentials had on the chemical treatment process.

Each of these effects could only be determined in terms of loss of correspondence after many more inflow experiments. On the other hand, in the case of a thin reinforced armored pipe, the thermal potential is small and can be sufficiently suppressed during the pouring process.

Attaching the ready-made manchun 5,7 to the roll 8 rod 6 places the manchun vertically on the plate 18. A polyurethane support ring 19 is then provided between the plate and the end 10 of the zero core rod 6. The outer diameter of the ring is smaller than the core diameter of the manchun. A piece of sealing felt is placed on the plate 18.

To align the manchun, use epoxy adhesive to make plastic protrusions 21 on the surface of the roll 8 rod 6 vertically every 3 to 6 pieces, or if the roll is long, concentrically with 3 to 6 rough edges.
You can add and paste items.

Next, the manchun is placed on the O-roll core, and the adhesive is pushed in again to fix it to the roll core. During bonding, the roll 8 rod is excessively pressed downward against the plate 18 in order to prevent the mandun from floating up. After the bonding agent has hardened, the roll with the Munchcon attached is roughly ground, and/or the roller is ground. Remove the upper and lower flow scum so that the manchun and the roll end 10 fit tightly together.

The projections 21 ensure reliable alignment between the manchun and the roll.

When renewing the coating, the rubber roll must be turned down to eight roll bars in order to remove the conventional coating, and at this time, the eight roll bars are also often shaved off. For this reason,
The diameter of the eight rods of conventional rubber rolls is becoming smaller and smaller. However, according to the present invention, this phenomenon does not affect coating renewal at all. In this case, since the annular gap @13 becomes a little wider, only a slightly larger amount of adhesive is required, and for centering the manchun, a protrusion 21 of a corresponding size is glued.

In the case of small rolls, it may not be possible to press the adhesive into the roll. In this case, the manchun can be covered on the inside with a layer of absorbent and compressible material, such as felt or cloth.

To cover the roll, absorb the adhesive into the absorbent layer and place the manchun over the roll. At this time, the adhesive is used as a IIW4 agent for covering.

According to FIGS. 6 to 9, the jaw structure of the manchun that forms the absorbent layer will be described below. Manchun's work starts with a belt-shaped reinforced exterior material 22. The belt material consists of a polyester felt 23, a grid cloth 24, and a covering layer 25 of polyurethane overlaid on the grid cloth. A reinforced armor belt 22, approximately 2-3 mm thick depending on diameter, is wrapped around a mandrel, for example a steel pipe 26. At this time, the felt is on the inside and the covering layer is on the outside.

The edges 27 of the seam are covered with a tie belt of polyurethane foil and heat sealed along the edges. This measure prevents the penetration of manchun materials into the nozzles during pouring, pressing, and during chemical processing. Any seepage will cause problems with subsequent gluing.

In another method according to FIG. 8, a wider belt 22 is applied around the mandrel 26 and the seam edge 27 is similarly coated, glued or heat sealed.

The coated mandrel 26 is then attached to a vibrator 29 with a larger diameter.
and pour polyurethane into the resulting intermediate gap 30. Place the larger vibrator 29 appropriately in the furnace so that the inside of the furnace is poured directly.

The pouring and chemical treatment operations take about 8 to 10 hours, after which the ready-made mantune 31 consisting of the sheath 32 and reinforcing layer 22 can be removed.

The exterior material can also be spray applied. Instead of polyurethane,
The exterior can also be made of rubber. In this case, 岑f<J L−
J and vulcanize.

Ready-made manchun provides a perfect seal with the roll and allows for a larger tolerance range. Before application, the absorbent and compressible inner layer completely absorbs the adhesive. Liquid adhesive Since it acts as a pickling agent, the manchun can be brought into close contact with the roll 8 rod without requiring much force.

A compressible polyurethane layer plays some of the roles necessary for adhesion. The adhesive is cured at room temperature within 2 to 3 hours.

Similar to the first embodiment according to FIGS. 1 to 5, this coating also
It consists of an elastic sheathing material 32, a felt impregnated with adhesive as a reinforcing sheath, and a thin adhesive layer between the reinforcing sheath and the roll core. The coefficient of thermal expansion of the rigid reinforced sheath after the adhesive has cured is at least as high as the temperature of the O-ring core rod.
almost equal to the coefficient.

[Brief explanation of the drawing]

FIG. 1 diagrammatically shows a first embodiment of the method for producing an elastic coating. FIG. 2 is an assembled view of the coating according to FIG. 1 attached to a roll 8 rod. FIG. 3 shows a coated O-ru. FIG. 4 shows another embodiment III of the coating manufacturing method. FIG. 5 shows the application h of the coating according to FIG. 4 to the roll core. FIG. 6 is a cross-section of a belt blank of a third embodiment of the elastic coating. 7 and 8 diagrammatically show the method for manufacturing a coating with a belt according to FIG. 6. Figure 9 is a coating made from belt material. Patent Applicant Huber & Ciconer Agee. Coo blue, cowt shock. Kanst Dock, Park JP-A-558-149413 (s) Fi, 6

Claims (1)

[Claims] (1) Roll 8 rods (or commonly called iron core)
and an elastic coating applied thereon, and the coating comprises:
Thermal resistance of the pipe (5°22) is made by a D-ru with an exterior made of elastic material and a rigid, impermeable inner reinforcing exterior.
! The coefficient of thermal expansion is at least approximately comparable to the coefficient of thermal expansion of the roll 8 bar (6), and the pipe (5, 22) and the roll 8 bar (6)
) is provided with an annular enclosure II (13) filled with adhesive. (2) Claims (+>)
Roll 8 rod (6) is rust-resistant and reinforced exterior pipe (5)
is a glass fiber-reinforced polyester pipe and has a coefficient of thermal expansion of ≦15.0xlO″6/°C. (3) A roll according to claim (1), comprising:
A protrusion (21) protruding into the annular gap (13) is glued on the zero core rod (6), and the length of the protrusion is such that the coating is
- a roll characterized in that the thickness of the annular gap (13) is comparable to 5) for the purpose of centering with the core rod; (4) A roll according to claim (1),
The thickness of the pipe (5) is 1 to 4 mm, and the pipe (5) is
The inner diameter (dl) of 5) is the inner diameter (d2) of the roll 8 rod (6)
A roll characterized in that it is about 1 to 5-1 larger than the roll. (5) A roll according to claim 0, characterized in that the adhesive is made of a polyester group, an epoxy group, or a polyurethane group that does not contain any solvent. (6) A roll according to claim (1), in which the coating comprises an annular base (1), on which a zero-ru front surface (10
) is inserted, an annular space (11) is formed between the annular base (1) and the front surface (10), and this space adhesive is filled and distributed. (7) A roll according to claim (6),
Roll characterized in that it is provided with a hole (12) in the coating leading into at least one annular space (11), through which the adhesive is introduced into the annular space (11). (8) A roll according to claim (1),
A roll characterized in that the elastic exterior material (a) is polyurethane. <9) A roll according to claim (1),
A roll characterized in that the exterior material is taut and adheres to the pipe (5) due to heat shrinkage. (10) A roll according to claim (1), in which the reinforcing sheathing pipe (22) is compatible with an interior (23) consisting of an absorbent and compressible material and an exterior material consisting of an impermeable material. A roll characterized in that it comprises an adjacent outer covering layer (25). (11) A roll according to claims (support)) in which a grid cloth (24) is provided between the covering layer (25) and the substance (23).
), and a coating layer (25) is applied to the -t. (2) A roll according to claim (10), characterized in that the substance (23) is felt and the covering layer (25) is made of a thermoplastic binder that adheres closely to the exterior material. 0) Made into a roll according to claim G, felt (
23) A roll characterized in that the roll is made of polyester felt and the coating layer is made of polyurethane. (to) A method for manufacturing a roll comprising a coating according to one or more of claims (1) to (9),
A coating is prefabricated and finally placed on the roll core (6), and the adhesive is forced into the annular space (13) by means of lower pressure through at least one hole (12) in the coating, where it A method characterized in that it is evenly distributed between the pipes (5) and the rolls (6). a9 A method according to the claims (to), 0-
A method characterized in that on the core rod, at least on the top and bottom, some protrusions for defining the coating are glued before applying the coating. (to) A method according to claims (to), characterized in that the adhesive is press-fitted into the annular gap at a pressure of up to 10 atmospheres, and the viscosity of the adhesive is 2500 cρ or less. 07) In the method according to claim (2), an adhesive is placed below the annular gap and is press-fitted into the annular space connected to the m gap, at which time the adhesive is inserted into the annular gap. A method characterized by flowing from the bottom to the top. (to) A glass INAM reinforced inner polyester pipe (5) in which the sheathing material is poured into a mold and said mold is used as an embedded formwork for prefabricating the coating, in a method according to the claims (to). and outer formwork pipe (8)
and characterized in that, after a chemical treatment step and cooling of the sheathing material, the sheathing consisting of sheathing (7) and pipes (5) is pulled out of the outer formwork (8). (19) A method according to the claims,
For the construction of the mold, an annular base (1) descending in steps towards the outer periphery is arranged so that the end of a polyester pipe made of polyurethane and reinforced with glass fibers (5) is placed above the inner step (3) of the annular base. A method characterized in that the end of the pipe (8), which is attached to and used as the outer formwork, is placed over the outermost stage (2) of the annular base. (20) A method according to the scope of claims (to),
The inner polyester pipe (5) and the outer formwork pipe (
8) into the annular group (14) of the base plate (15) for the vertical configuration, and finally the polyurethane material is introduced through the holes in the lower side in the external formwork pipe, so that the pouring process A method characterized by being carried out from the bottom up. (21) In a method according to the claims, a polyester pipe (5) is provided with a layer of absorbent and compressible material on the inside, and this 1 is impregnated with an illumination agent,
and applying the coating onto the roll. (22) A method for manufacturing a roll provided with a coating according to one or more of claims (2) to (2), wherein a belt-like or rectangular reinforcing sheath is wound around or around a mandrel. to make the seam edges stick or seal, and finally apply the exterior material,
Moreover, the film is characterized by assembling the film produced in this way onto eight rolls. (23) A method according to claim (22), characterized in that the seam edge of the reinforcing sheath is covered with a foil-like belt piece and heat-sealed with the covering layer. (24) A method according to claim (22), characterized in that the sheathing material is poured, rolled or sprayed. (25) A method according to claim (22), characterized in that the layer of the reinforcing sheath is impregnated with an adhesive and then the coating is applied to the roll 8 bar.