TW458877B - Heating of calender roll surfaces - Google Patents

Abstract

A method and apparatus for rapid heating of calender rolls 350, 352 for a calendering apparatus 200 is disclosed. At a heating area 800, the rolls 350, 352 are preheated, reheated, or maintained at any temperature prior to the rolls 350, 352 being placed into the calendering apparatus 300. The preferred method of heating is by induction heating. The rolls 350, 352 may be delivered to the heating apparatus 802 from an initial storage area 420 or the calendering apparatus 300. The rolls 350, 352 are transported by an overhead transfer mechanism 400. The disclosed method and apparatus greatly facilitate formation of multi-layered laminates and is particularly useful in the tire building art.

Description

4-5 6 8 '/ 7 V. Description of the invention (1) Technical scope The published invention relates to a unique method and device for heating the rolling mill 轺 i in the sub-rolling mill 辕 subsystem, in which the rollers can be replaced at any time. The published heating method is particularly suitable for a method for forming a tire element of a predetermined profile. BACKGROUND ART Conventional heating methods for rolls of rolling mills include hot water flow heating and resistance heating. However, with this traditional heating method, it takes a considerable time to heat the entire roller. Guanzi's induction heating is also known in the art. With induction heating, Che Kunzi's heating can be selective and very fast at the same time. Induction heaters are basically classified by the frequency of the induced current. Low-frequency heaters usually induce electric currents in electric charge, medium-frequency induction heaters sense currents at frequencies between 180 and 540 Hz, and high-frequency heaters sense currents at frequencies of 1000 Hz and higher. U.S. Patent No. 5,571,066 discloses heating of rolled parent-child ends. An external electro-magnetic induction system heats the entire working surface of the roller, and an internal resistance heating system heats the roller from the inside. In normal operation, only the external heating system functions. The internal heating system must be around to direct the rollers to the necessary operating temperature. . U.S. Patent No. 5, 1 2 3, 3 40 issued induction heating for flexible rolling mills and super rolling mills. The roller is equipped with a thermally conductive coating. U.S. Patent No. 5,11,5,64 has published two induction heating coils on the corresponding ends of the roller. Induction heating gives liquid heating in the middle of I. U.S. Patent No. 5, 0 74, 0 1 9 published on the inside and outside of the roll of the rolling mill

Page 5 45 88 7 7 V. Description of the invention (2) Use high frequency induction heating wire 圏. The majority of the coils are evenly distributed over the entire length of the roller. For uniform heating, a correspondingly arranged induction heating coil can be arranged along the length of the outer side of the roller. Almost all of the above-mentioned prior art patents consider a small increase in the outer diameter of the roller for paper processing. The previous technical reference materials cannot guide the heating of the rolling rollers at the separated position during the rolling process. At least one of the rolling mill parent-child members was accidentally replaced by other parent-child members in order to operate during the rolling process. U.S. Patent Nos. 5,513,560 and 5,762,740, both of which are incorporated herein by reference, publish a quick replacement method and device for the rolling device 2000. The published device 200 is used to form a thin layer from a series of tire elements to form a tire cover. Each rolling mill assembly 3 02 includes two rolling mill rolls 3 50, 3 52 as shown in FIG. The rollers 3 5 0, 3 2 5 are conveyed to the assembly 3 2 2 by an overhead mobile conveyor 4 0 0. During the rolling process, the rolling mill rolls 35, 352 can be heated and cooled internally. The heating device 33 5 has a resistance heating element that enters the internal heating element 3 3 5 through an opening in the hub 31 4 or 316, and is used when the material to be processed can be more effectively used in a heating environment. Although the heating device is sufficient to heat the rollers 3 5 0, 3 5 2 from the inside, when the rollers 3 5 0, 3 5 2 are heated before their rotation to the rolling mill assembly 3 2 0, a more efficient rolling treatment . & The present invention is directed to a rapid replacement rolling device 5 35 2 ^, ^ 35; heating on the station. Before the rolls 35 0, 3 5 2 are put into the rolling mill assembly 302, add the mouth first ...,

4 5 8a V. Description of the invention (3) Heat, allow quick catch start " — The internal heating device is pressurized to operate without pressing the roller to wait for the front of the roller. The internal heating device can be used to keep the temperature of the rollers. In the heating station, the induction shirt is used to heat the parents almost instantly. This is the preferred heating method. Induction heating method. ..., at the same time, for a more efficient heating method. Summary of the invention The present invention is an improved method for the rolling of the roll material and the lepton. The material is often milked by at least one roller. $ The roller is replaced before the beta roller is operated at a predetermined operating temperature. It is heated at the rolling temperature at which the new roll is placed in its rolling device. It is preferred that a heat source be at a lower temperature than the operating temperature. The pre-warming operating temperature range is from 180 degrees Fahrenheit to 260. Materials can be replaced in a single phase. The view of the child is rolled at the same time by another related roller heating roller dryer, preferably at 7 to 11 kHz. The method is induction heating. Induction heating line 圏 published under the frequency of the heating roller dry》 The rolling method in the press device, the sub-method, can also be used to reheat the self-rolled heating 坫 f, the removed roller. It can be re-stressed = it can be placed into a roll, and it must be heated before it is placed inside. When the roll is heated, it will be heated at any temperature for a period of time. 1 ^ i ± X μ In the slave room, the roller temperature can be reached during the production period: when the roller is heated to a temperature higher than the operating temperature, it can be changed and cooled to the operating temperature during the holding period.

Μ 4 5 8a 7 7 V. Description of the invention (4) Brief description of the drawings The present invention will be illustrated by examples and with reference to the drawings! Description of a quick-change rolling mill installation, "... Figure 2 illustrates a single heating station; careful attention to the figure; Figure 3 illustrates the configuration of a pair of rolling mill rollers; Figure 4 is a sectional view of Figure 3; Induction heating line ® 6 shows the induction type without main pillar plus Figure 7 shows a rolling mill assembly. Wing Circle Detailed Description of the Invention Figure 1 illustrates a quick-change roll mill. 5,5,5,5,5, Sichuan, 74G special place \ set of view. For example, the United States series of components constitute a thin-layer component special device _ is used ... Ship component composition-tire cover. The construction of Mengjin is suitable for the majority of relay devices 300. The tire-shaped covering parts of each package of 2 ° / °° are machine lepton 350, 352. Each of the pro-rolling mills / sets 30 includes two pro-rolling mill rolls 350 and 352, which are rolled to a predetermined 7300, and the thin-layer parts are rolled: a frame-moving conveying mechanism 40. Since an initial 5. Bar 420 was delivered to assembly 302.耝 早 · Mechanism 400 can be removed from the station Q domain. It can be set from the rolling mill to 300 别 4 i @ 子 5 '5 At the same time, it is expected to make a reservation in the form of a monolithic thin layer or a ^^ f layer element. When the morphology constitutes a thin layer, the cross-section morphology is different from that of other rolling mills. In order to further discuss the different shapes of the rolling mill rolls 350, 352, the rolling mill device 3⑽, and the overhead conveyance 'only 400', please refer to US Patent Nos. 5,513,560 and 5,762,740 °

, 458877 V. Description of the invention (5) In the process of forming thin parts from a series of components, the forming process can benefit from the heated rolling mill rolls 3 50, 3 52. The rolling mill rolls 3 5 0, 3 5 2 can be heated internally as described elsewhere. The method and device published earlier can be improved by providing a heating zone 800 between the roller station area 420 and the tire elements constituting the device 200. The heating zone 800 is a plurality of heating stations 802, and each station is preferably in the forming device. In the tire element of 200, it corresponds to a rolling mill device of 300. If it is determined that external heating of the roller surface is not required at some places during the rolling process, fewer heating stations can be set. A series of heating stations 802 can be connected by a frame extending from the first heating station to the last station (not shown). ', FIG. 2 schematically shows a unitary heating station 802 which is not equipped with a rolling mill roll 352 heated thereon. The heating station 802 is provided with a frame structure. A ground moving view 806 crosses the heating station 802. The driving roller is belted by a motor 808. There is a pair of driven rollers 81 on the corresponding side of the heating station 802. Each of the two 3 S units can allow the parent and child to rotate freely. -Heating equipment ^ Placed in the mother-active | Kunzi 81. And driven view of 806. It extends slightly in the lengthwise direction of the heating roller 2, which is roughly the same as the lengthwise direction of the two moving rollers 8 10. The inductive type of heating device 8 丨 2 and device m extending in the entire length direction is slightly placed on the heating roller rolls 3 5 0, 3 5 2 by a single piece 32 ° at a fixed position of Gao Mou Qin Hong a, == It is located above Cheng Fuzhi's light rolling mill newspaper 3 50, 352. The figure 32Q has-a hard member 3 24 ′ whose shape is suitable to accurately fit two

O: \ 60 \ 60641PTD Page 9 4 5 88 7 7 V. Description of the invention (6) Above and between rollers 350, 352. The plow 32 is fastened and provides lateral support of the rollers 3 50, 3 52 'while forming a tire cover on the tire elements constituting the device 300' prevents overflow of the rolled material. When the S-roller lepton 350, 352 is placed in the heating station 802, each of the rollers 350 '352 contacts the driving roller 806 and a driven roller 810 as shown in Fig. 4. When the active lepton 80β rotates in the direction indicated by the arrow, each of the mill rolls 350, 352 rotates in the opposite direction as shown. Due to the contact point, the driven roller 810 rotates in the same direction as the driving roller 806 as shown. The light rolling mill sticks 3 50, 352 are in close proximity to the heating device 812 ^ The heating source 8 12 is placed in the frame 804 at an inclination as shown, and the heating source 8 1 2 is in close contact with the rollers 3 50, 352. Each roller 350, 352 is associated with a single heat source 812. The preferred final temperature of the rollers 350, 352 is from about Fahrenheit to about 26 G degrees (60 to 160 degrees Celsius). The initial temperature of the roller 3 5 0,352 can be changed from room temperature to the final temperature; this is the initial rough temperature of Fahrenheit to 260 degrees Fahrenheit (IS to I26 degrees Celsius). Although most of the enthusiasts heated in the heating station M2 are above room temperature ', the newspaper may also be transported from the tire elements constituting the device 300 to the heating station 802 to reheat, adjust, or maintain the roller Of temperature. ‘'Β "

The temperature sensor is installed on the heating frame 804 near the lepton 3 505 352 'to measure the roller temperature. This data is provided to the controller 2 (not shown) 'and analyzes the heating cycle and roller speed of the heating device. The superficial velocity of parent-child 35, 352 also plays a role in the heating process. The rate of rotation of each lepton 3 50, 352, 8 0 6, 810 determines part 352

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For: Leave the amount of time in the heating range generated by 812 Ϊ. & Sub-rate feedback vibration set is also used to provide rate data for control V. Description of the invention (7) Possible heating types, including heat sensing. Induction of electricity can be achieved by adding electricity and radiation to add 352 ia -3-QSn _ nominally. .Yuanyuan material constitutes a roller 3 50, ciaz has a parent-child 35 0, 352 into an AC device in more than 10 Operating at a frequency of megahertz. to. 3 electricity plus ”, ♦ M t 2 η The best method described above 5 is by induction heating coil 814. ^ When rotating, each roller 3 50, 352 surface will be continuously connected 2 induction by the relevant induction wire 圏 814 Electric field. For induction heating, the gap between each heating device 812 and related rollers or 3 52 within the minimum distance ranges from 1/16 inch to 1/2 inch (158 to 1270 cm), and the preferred distance is 5/32 inches (from 3.97%). If the gap is too large, the heating efficiency of 814 is reduced. ^ A more complete overview of the preferred induction heating device 8 丨 2 in Figures 5 and 6. The induction coil 814 is heated due to its single side And it is preferably made of square copper tube and is traditionally known as the type of separated rotating pancake coil. The induction coil 8 1 4 is supported by a group of support brackets 816. Each bracket 816 includes a main bracket 818 and an angle bracket. : 820. Branch.822 can also be used for fixing. The induction wire 圏 814 is fastened to the angle bracket 820 by most brass accessories 824. Other traditional fixing devices can also be used. The main requirement is that the fixing device is made of non-conductive Made of insulating material.

The coil 814 is fixed to a pair of copper plates 826. Each steel plate 826 is L-shaped. The short pillar 828 of the L-shaped copper plate is equipped with a device fixed to the power supply 830 ° L

Page 11 458g 7 7 V. Description of the Invention The long pillar 832 of the (8) -shaped copper plate is provided with a crack 834 for fastening two copper plates. Between the two copper plates is a separator 8 3 6 made of Teflon. The separator 8 3 6 is used to separate the positively and negatively charged plates 826. The copper plate 826 and the spacer 83β are fixed by nylon nuts and bolt accessories. Adjacent to each copper plate 8 26 and protruding from the bottom side of the coil 814 is an inlet 8 3 8 for the coolant which is basically distilled water flowing in the induction coil 8 1 4, but other traditional ones can also be used Coolant. The coolant moves along the center pillar 840 of the coil in two directions, it shunts at the corresponding ends 842, 844 and flows back along the pillars 8 4 6, 8 4 8 outside the coil. The coolant is discharged through the tongue-shaped pipe 850 and at the same time through the outer pillar 8 522. The tongue-shaped fitting 850, the inlet piece 838, and the outlet piece 852 are similar to the coil 814 and are made of copper. The inlet member 838 and the outlet member 852 are preferably circular pipes as shown, but they may also be square pipes. During the operation of the induction coil 81 4, because the inside of the induction coil 8 1 4 is cooled by the circulating coolant, the sensed heat accumulation cannot be seen on the coil 81 4. The current passing through the induction coil 8 1 4 moves on the opposite path through the coil 81 4. The current flows through a copper plate 8 2 6 and the outer coil stays 8 4 6 and 8 4 8 are connected to the first coil end 842 or 844 and follow the central stay 840 downward. At the corresponding end 844 or 8 42 shunt through the original stay 846,848 while flowing into another steel plate 8 2 6. Since the current passing through the line is AC (AC), the current path itself is reversed once per cycle. In order to force the current to flow along the center pillar 8 4 0 of the coil 8 1 4 to generate a larger induced electric field on the coil 8 1 4. A plurality of flow concentrators 8 5 4 are stacked along the bottom side of the center pillar. Concentrator 8 5 4 only shown in part of the coil 8 1 4

O: \ 60 \ 60641PTD 苐 12 pages 45 8 $ 7 V. Description of the invention (9) '' ----- !! ° Y 疋 ', the thickener 8 54 is arranged along the entire length of the coil 8 1 4 . Chen device 8 5 4 increases the heating efficiency of the published system. The conventionally known material H-retractor 854 is a thin u-shaped member. The concentrator 8 54 fills the space between the extension bolts 856 separated along the center pillar. In order to increase the efficiency of the induced electric field, once every 1/4 pair (approximately 6.35 meals), an insulating member having the same shape as the volume concentrator is placed in the flow concentrator 854 The two or two insulators cut off any current attempting to flow through the flow concentrator 8 54. If there is no insulation, the concentrator 854 will use the energy that is additionally delivered to the coil 3 50, 3 5 2 and tends to increase the unnecessary thermal energy. For protection, a cover 858 can be applied to the top of the heating device as shown in FIG. The cover 858 is fastened to the bracket 82. The power wattage and its frequency vary with the controller, and the frequency and power supplied to the coil are changed. Watts control 埶 I generated on coils 3 50, 352. The power frequency of the coil 814 controls the depth of heat generation. At higher rates, most of the heat will be sensed on or near the surface of roller 352. At low frequencies, the heat will penetrate deeper into the roller 352. two. The system published on 'Using a higher frequency can increase the roller 3 50, 352 more efficiently by this' will operate at a higher frequency, which has a narrow air gap between the roller and . According to the invention published by Tian, the frequency range is from 1 kHz to 20 kHz, and the frequency is 7 1 11 kHz. If the frequency is too low, a noise that can be heard from the stomach to the ears of nearby people will be generated. During the operation of an induction coil which is better than the dry coil 埶 5, the rollers 3 5 or 3 2 2 are added ... a limited depth. Another lepton 35 0 or 35 2 will be deeper when the induced heat

4δββ 77 5. Description of the Invention (ίο) When it is put into the roller 350 or 352, it is heated by the traditional conduction. The combination of induction heating and conduction heating 'optimizes the energy consumption of the heating station 802, and is beneficial to the roller material. With the published induction heating device, the entire 1300 lb (2866 kg) mass can be heated from room temperature of about 70 Τ (2 1 ° C) to 200 ° F (9 3) in about 3 minutes ° C). Compared with the previously published internal heater, this has extremely fast heating. It takes about 20 minutes to heat the inside of the same 300-pound roller to the same temperature. The use of heating station 802 published in this article can provide improved processing efficiency of the rolling mill, while also allowing greater flexibility in the light rolling process. By placing the rollers 35 0, 35 2 in the rolling device, the rolling process is started once the rollers 35 0, 35 2 are tightened, without waiting for the internal heater 3 3 5 to roll the rollers 3 5 0 '3 5 2 bring to the desired operating temperature. Once the heated rollers 3500, 352 are placed in the rolling device 302 according to the present invention, internal weeping 3 35 can be used to maintain the temperature of the rollers. … M station 8.0, 2 also allows for faster replacement of thin-layer parts specifications or maintenance rolling 2 + when looking forward to changing the specifications of thin-layer parts, the second has a different defined shape a2: I shipped to the heating station 8 〇 2. Simultaneously heat to the operating temperature I 2 'ί = = f 更 南 的 温度. If the temperature is higher than the expected temperature, the grain needs to be cooled down to the desired temperature in series. Therefore, for some reasons, such as: hope: ί —: to replace the most rolling equipment 3 02 more and keep warm, even when coupled replacement, all rollers 3 50, 35 2 can be heated before and Some rolls to be replaced may be heated to a higher temperature because they are placed in the relevant rolling device and have a longer holding time.

Page 14 V. Description of the invention (11) When the material is changed as described, the roller is reheated at the same time at the operating temperature. What are the conditions of the 3 5 0, 3 2 2 insertion, once the resulting rollers 350, 352 have a lower temperature capability, and if the rolling device 30 2 needs to be repaired or to be completed—items 350, 352 may When returned to the heating station 802 for heating / performing the desired maintenance or material replacement, it may also happen to be kept in his condition, which may hurriedly roll the roller heating station 802 for reheating or maintain a temperature. Regardless of the state of hope, the rollers 3 5 0, 3 2 5 are placed in position, so that they are kept in an allowable rolling device 3 0 2 to operate almost instantaneously, which will increase the efficiency of the device 2 0 0, which will result in the process and Reduced manufacturing costs.

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Claims (1)

45 887? VI. _ Please patent scope ~ ~--^ 1. A method of rolling a material, which uses at least one rolling mill roll (35 or 352) that can be operated at a predetermined operation = degree, rolling mill The roller may be replaced with at least one roller (3 50 or 352) at regular intervals, which is characterized by: Before placing the parent-child (350 or 352) before positioning to roll the material, by _, source (8 1 2) and Roller rolls (350 or 352) that are replaced by heating at a temperature below the operating temperature. 2. The method of rolling a material according to item 1 of the scope of the patent, wherein the replaced rolling mill roll (350 or 352) is added by an induction heating line diagram (814), 3. According to the item 2 of the scope of patent application A method of rolling a material, in which an induction heating coil (814) operates in a frequency range of 7 to 11 kHz. 43. The method for rolling a material according to item 1 of the scope of patent application, wherein the predetermined operating temperature range is from 14 to 26 degrees Fahrenheit. 5. The method of rolling a material according to item 丨 of the patent application scope, wherein the material is pressed against the relevant roller (350 or 35 2) IL and replaced by a pair of related parents (350 or 352) at the same time. 6. The method of rolling a material according to item 1 of the scope of patent application, further comprising removing the replacement roller (350 or 352) from its rolling position, while the replacement roller (350 or 352) is reheated and placed in it Steps of rolling position. 7. The method of rolling a material according to item 6 of the scope of patent application, wherein after the roller (350 or 352) is reheated and replaced, the roller (350 or 352) is held for a period of time before being placed in its rolling position. . 8. A method of rolling a material according to item 1 of the patent scope of the application 其 Its in Page 16 45SS77 VI. After applying the patented scope of heating and replacement of the rolling mill roll (350 or 352), the replacement lepton (350 or 352) is kept warm before being placed in its position to compress the material-period: 9 According to the 7th or 8th of the scope of the patent application, the rolling is heated to-higher than the pre -... temperature. Or guanidine time to allow the parent-child (3 50 or 35 2) to cool to operation