TW457188B - Manufacture of rubber roller - Google Patents

Abstract

Disclosed is a manufacture of a rubber roller, comprising the steps of: A. affixing an end shaft to each of opposing ends of a center shaft tube; B. forming plural annular grooves to the end shaft surfaces after step A, and applying an adhesive to outer faces of the center shaft tube and the end shafts; C. inserting the center shaft tube of step B into a mold tube, and inserting a first and a second retaining caps to opposing ends of the mold tube for retaining the end shafts, such that a proper space is formed between the inner diameter of the mold tube and the outer diameter of the center shaft tube; D. after step C, injecting rubber materials between the mold tube and the center shaft tube from the injection gate of the first retaining cap, and completing the injecting process when an overflowing opening provided on the second retaining cap evenly overflows with rubber; E. removing the first and the second retaining caps and installing a third retaining cap; F. heating and curing the rubber of step E; G. cooling and forming the rubber of step F, such that the rubber is joined and affixed to the center shaft tube, and drawings the center shaft tube along with the rubber from the mold tube; and H. trimming excessive rubber burrs at opposing ends to obtain a final product for the rubber roller.

Description

457188 Case No. 88108188 Amendment V. Description of the Invention (1) [Scope of the Invention] The present invention provides a method for manufacturing a rubber roller, in particular, it allows the surface of the roller to obtain a delicate surface after the manufacture is completed. . [Background of the Invention] Conventionally, in the manufacturing process of printed circuit boards, because some processes often come into contact with corrosive chemicals, the rubber rollers used to transport printed circuit boards must be resistant to acid and alkali corrosion. Sex. The general transmission rollers are made of rubber material, and the traditional rubber roller manufacturing method is as follows: 1. First, a solid central shaft is made by turning. 2. The finished rubber material is extruded out of a hollow rubber tube by extrusion molding, and the inner diameter of the hollow rubber tube is slightly larger than the outer diameter of the above-mentioned central shaft. 3. Apply the bonding agent on the surface of the above central shaft, and then insert the inner diameter of the hollow rubber tube. -Fourth, a band-shaped cloth is wound around the outer diameter of the hollow rubber tube to bind it; as a setting aid, the rubber is tightly attached to the central shaft. V. Put the hollow rubber tube and the central shaft after winding the tape into the heating furnace for heating and vulcanizing treatment. 6. Take out the hollow rubber tube and the central shaft after vulcanization is completed. At this time, the rubber is combined with the central shaft. After cooling and setting, remove the strip cloth to form a round shape on the surface of the central shaft but not very Regular wheel. 7. Process and grind the surface of the roller to a predetermined size to obtain true roundness and obtain a finished product.

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457188-^^ 88108188 V. Description of the invention (2) Don't ~ However, the above-mentioned traditional rubber roller manufacturing method has at least a 牮 π and more than 1 missing. T · ^ Test the weight of the solid metal of the center axis The finished product must be processed after removing the band cloth. The grinding roller must be reserved for grinding during extrusion molding (about 0,5 cm processing margin, Therefore, a lot of rubber materials are used. 'The waste generated is also very large, which directly increases the material cost and also produces a large amount of waste. 3. Because the rollers after disassembling the strip cloth must be processed and ground again. The manufacturing process is more troublesome. Mom, in order to allow the rubber to be ground smoothly, it is necessary to add a suitable wound mineral powdery mineral additive (commonly known as stone powder), which can make the rubber easier after molding Being processed by grinding; the additives remaining in the rubber roller will change the quality of the rubber roller ^, which will reduce the service life.

Hardening, sticking, etc.), and difficult to clean during maintenance. 6. In order to make the rubber easy to grind, the molding / breaking of the traditional rubber roller needs at least a Shore hardness of 50 degrees or more. 〇H: After grinding, the roller will produce scratch marks that are not easily visible to the naked eye. The grinding scratches are easy to attach chemical swords in the process, and the chemicals will cause damage to the rollers (for example, soften

Page 6 4 571 88 Case No. 88108188 _ Year Modified __ V. Description of the Invention (3) Therefore, the present invention provides a manufacturing method which can overcome the above-mentioned shortcomings. [Summary of the invention] The main object of the present invention is to provide a method for manufacturing a rubber roller, which can maintain the integrity of the structure of the rubber body after the manufacture is completed, so that the surface of the roller is more delicate and smooth, so as to avoid the penetration of chemicals and damage to the roller; At the same time, the hardness of the rubber can reach an ideal softness of 20 to 25 degrees Shore hardness. A secondary object of the present invention is to provide a method for manufacturing a rubber roller, which can be made lighter than a conventional roller. Another object of the present invention is to provide a method for manufacturing a rubber roller, which does not need to add additives to the rubber used to manufacture the roller, and can avoid the rollers being affected by the additives to reduce the durability and shorten the service life. Another object of the present invention is to provide a method for manufacturing a rubber roller, which hardly generates waste during the manufacturing process, thereby reducing the cost of materials and reducing waste in a large amount. Another object of the present invention is to provide a method for manufacturing a rubber roller. The roller does not need to be reground after the manufacturing is completed, which can save processing costs and shorten manufacturing man-hours. Based on this, the manufacturing method of the rubber roller provided by the present invention is to firstly fix one end shaft at the two axial ends of a central shaft tube, and then set a plurality of annular grooves on the surface of the end shaft; Pierce into a mold tube, and fix the two-end shaft to the two ends of the mold tube by the first and second fixing caps to maintain a proper space between the outer diameter of the central shaft tube and the inner diameter of the mold tube; and rubber Injection between the mold tube and the central axis tube, after the injection operation is completed, the first

457] 88 _Case No. 88108188_ Revised Year of the Month _ V. Description of the Invention (4)-The first and second fixing caps are removed and the third fixing cap is replaced and heated and vulcanized; After being removed, the rubber is cooled and molded. The rubber is combined with the central shaft tube and fixed, and then the central shaft tube and the rubber are pulled out of the mold tube to obtain a smooth and fine surface rubber roller. The other objects and functions of the present invention will be further understood by the reviewing committee by further explaining it with the following drawings. [Explanation of the embodiment] The manufacturing method of the provided rubber roller includes the following steps: A. One shaft is fixed at the two axial ends of a central shaft tube respectively (see FIG. 1); B. Completed in step A The rear end shaft is manufactured with a smaller-diameter mandrel, and the surface of the portion where the end shaft is to be combined with rubber is provided with a plurality of grooves. The central shaft tube and the end shaft are prepared to be combined with rubber. Binder (see Figure 2); C. Pass the central axis tube after the completion of step B into a mold tube, and set a first fixing cap with an injection port and a plastic overflow at each end of the mold tube. The second fixing cap of the mouth is to fix the end shaft to the mold tube, so that there is a proper space between the inner diameter of the mold tube and the outer diameter of the t mandrel tube (see Figure 3); D. In step C After the completion, shoot the prepared rubber material between the mold tube and the central shaft tube (see Figure 4); E. Remove the first and second fixing caps in step D and change the third fixing cap to close the mold tube At the other end, the rubber is heated and vulcanized; F. After the rubber in step E is cooled and molded, the rubber I.e., the central axis of the tube binding solid

457188 _Case No. 88108188_Amended in January of the year_. 5. Description of the invention (5) After the central shaft tube and rubber are pulled out of the mold tube, the roller is completed (see Figure 5); G. Cut off the shots on both sides The remaining material of the glue mouth and overflow glue mouth is completed. As shown in Fig. 1, the central axis tube 1 of the present invention is a precision seamless carbon steel tube, which has better flexibility and elasticity and can withstand large bending flexibility. The end shaft 2 is a solid and chemical-resistant circular shaft of stainless steel, titanium alloy or other non-metallic material. A small diameter portion 2 1 with a smaller outer diameter is turned on one end, and the small diameter portion 2 1 The outer diameter is not less than the inner diameter of the end of the central shaft tube 1. As shown in Figure 2, after coating the small diameter portion 21 of the end shaft 2 and the inner edges of both ends of the central shaft tube 1 with a chemical-resistant adhesive (such as epoxy resin), the end is then hydraulically machined. The shaft 2 is forced into the inner diameter of the end of the central shaft tube 1 to obtain a completely sealed complete shaft body; and the mandrel 2 3 is turned on the other end of the end shaft 2 opposite to the small diameter portion 21 by turning. And the large outer diameter surface of the end shaft 2 prepared to be combined with rubber forms a plurality of ring grooves 2 2 parallel to each other, and the end shaft 2_ is provided with a flat surface or a retaining ring groove as appropriate within the appropriate length of the outer end structure. As shown in Figures 3 and 4, the central shaft tube 1 combined with the end shaft 2 is penetrated into a mold tube 3; the mold tube 3 is a non-ballasted steel tube, and its inner diameter is smoothed and polished in advance. Mirror surface, the size of which is the size of the final product plus the shrinkage margin of the rubber; the outer diameter of the two ends of the mold tube 3 are provided with outer ridges 3 0; and the two ends of the mold tube 3 can be fitted with a first The fixed cap 31 and a second fixed cap 32 support the end shaft 2. The first fixed cap 31 is provided with an internal thread 3 1 4 which can be locked to the external thread 30 of the die tube 3 at one end of the cap body, and the other end is provided with a lock for the plastic injection machine. The external thread 3 1 1 is provided with a central hole through which a central shaft 2 3 of the end shaft 2 can pass.

457 1 88 Case No. 88108188_ Year and month Amendment V. Description of the invention (6) 3 1 3, and the center hole 3 1 3 is provided with a plurality of plastic injection ports 3 1 2 around the ring. The above-mentioned second fixing cap 32 is provided at one end of the cap body with an internal thread 3 2 1 ′ which can be locked to the external thread 30 of the other end of the die tube 3, and the opposite end of the second fixing cap 32 is A central hole 3 2 2 is provided in the center. The periphery of the central hole 3 2 2 is provided with a plurality of smaller diameter overflow holes 3 2 3. When the central shaft tube 1 passes through the mold tube 3, it is fixed to The mandrel 2 3 of the end shaft 2 at the two ends of the central shaft tube 1 passes through the center holes 3 1 3, 3 2 2 of the first fixing cap 3 1 and the second fixing cap 3 2 respectively, and then the first and second fixings are fixed. Cap 3 1, 3 2 internal thread 3 1 4, 3 2 1 is locked to the mold tube 3 external thread 3 0 to support the end shaft 2 in the mold tube 3 so that the outer diameter of the central shaft tube j and the mold tube Keep a proper space between the inner diameters of 3, and lock the external thread 3 1 1 of the first fixed cap 3 1 with the shooting outlet of the shooting machine, so that the shooting machine can melt into a chewing gum-like rubber The raw material is injected into the mold tube 3 through the injection port 312 of the first fixing cap 3 (as shown in FIG. 5), and the excess rubber material in the mold tube 3 can overflow from the overflow rubber port 323 of the second fixing cap 32. When the rubber mold material 3 causes the rubber jump material to overflow from the overflowing rubber mold ^ of the second fixing cap M, then the first and second fixing caps 3 and 32 are removed from 悮 S d, and then the third fixing is performed. The cap 33 is locked to the mold tube 3 bis = 33 is provided at the end of the cap body which can be locked to the outside of the mold tube 1 thread :: 第 内 螺 ：, and the closed end of the other end is provided- = After shooting ', then put the mold f 3 together with the center of the tube 1 and the rubber inside e 3 into the heating furnace when vulcanization treatment, w succinization treatment, after the injection, after that If * The vulcanization section Wangli is completed and cooled and the end: 2? Is the roller 4; in this way, the roller 4 together with the central shaft tube 1

Page 10 and ...-Pull out the mold tube 3 (as shown in Figure 6). Since this issue: month; mining 457188 _ case number 88108188 _ year month day _ amendment _ V. Description of the invention (7) The rubber used is ", jPjM" ψ, which has a shrinkage of about 2.5%, so After the rubber is cooled and formed, it will naturally be smaller than the original size. Therefore, as long as the jig is slightly pressed on the end of the mandrel 23, the entire roller can be pushed out of the mold tube 3 to become a finished product. In addition, because the inner diameter of the mold tube 3 is a smooth mirror surface, the surface of the roller 4 made can also obtain a smooth surface, and it does not need to be processed and ground again; and because the rubber commonly known as stone powder is not added, it is also Can not be processed and ground, and the structure of the original rubber has not been damaged, and there is no sponge-like structure, so it can avoid the grinding and processing of the surface of the roller 4 to cause injuries and residues of chemicals during the process, which will affect the life of the roller. In addition, since the central shaft tube carbon steel tube of the present invention has better flexibility and elasticity, but is less resistant to chemicals, the ring grooves 2 2 provided on the surface of the end shaft 2 in the present invention are in addition to In addition to the function of firmly binding with rubber, it also has the function of preventing chemical fluid from penetrating from the ends of the roller to the central sleeve. In addition, the present invention generates almost no waste during the manufacturing process, and the manufacturing is more streamlined. It actually has industrial use value and meets the legal requirements of the invention patent. The above are only used to explain the preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Therefore, any modification or change related to the present invention made under the same spirit of the invention Should still be included in the scope of the present invention.

Page 11 457188 _Case No. 88108188_Year Month Day__ Brief Description of the Drawings [Brief Description of the Drawings] Figure 1 is a schematic plan view showing the first step of the present invention, forcing the end shaft into the central shaft tube first; Figure 2 In order to show the second step of the present invention, the end shaft of FIG. 1 is forced into the center shaft tube and then fixed, and there are multiple plan grooves on the end shaft car; FIG. 3 is a view showing the center shaft tube of the present invention and the An exploded perspective view of the combined relationship between the die tube, the first fixed cap, and the second fixed cap, and a perspective view of the structure form of the third fixed cap; FIG. 4 is a view showing the third step of the present invention, and the central axis of FIG. A schematic plan view of a tube that penetrates into a mold tube and is positioned by the first and second fixing caps; Figure 5 is a diagram showing the fourth step of the present invention. FIG. 6 is a plan sectional view showing the fifth step of the present invention, after the central shaft tube and the end shaft of FIG. 5 are ejected from the mold tube together with the rubber roller. [Illustration of drawing number] (1) Central shaft tube (2) End shaft (2 1) Small diameter part (2 2) Ring groove (2 3) Mandrel (3) Mould tube (3 0) External thread

Page 12 457188 _Case No. 88108188_ A simple explanation of the revised drawing (3 1) The first fixed cap (3 11) the outer screw (3 1 2) the injection port (3 1 3) the central hole (3 1 4) Internal thread (32) Second fixing cap (321) Internal thread (3 2 2) Center hole (3 2 3) Overfill hole (33) Third fixing cap (331) Internal thread (3 3 2) Center hole (4) Roller

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Claims (1)

457188 _; _ Case No. 88108188_ Modification of the month of the year _ 6. The scope of patent application 1. A method for manufacturing a rubber roller, which includes the following steps: A. The two axial ends of a central axis tube are respectively fixedly installed One end shaft; B. A plurality of ring grooves are provided on the surface of the end shaft after the completion of step A, and the central shaft tube and the outer surface of the end shaft are coated with a bonding agent; C. The central shaft tube after the completion of step B is passed into a Inside the mold tube, and the two ends of the mold tube are respectively provided with a first fixing cap and a second fixing cap to fix the end shaft, so that there is a proper space between the inner diameter of the mold tube and the outer diameter of the central shaft tube; D. After step C is completed, the prepared rubber material is injected between the die tube and the central shaft tube through the injection opening of the first fixed cap, and it is completed when the overflow hole provided in the second fixed cap has a uniform overflow. Injection operation; E. Remove the first fixing cap and the second fixing cap and replace with the third fixing cap; F. Heat and vulcanize the rubber in step E; G. Wait for the rubber in step F to cool and form After the rubber and the central shaft tube are fixed together, connect the central shaft tube Pull out the mold tube with the same rubber; H. Repair the slight excess rubber burrs at both ends to complete the finished rubber roller. 02. According to the manufacturing method of the rubber roller described in item 1 of the scope of patent application, wherein one of the end shafts A small-diameter portion is provided, and the outer diameter of the small-diameter portion is slightly larger than the inner diameter of the end of the central shaft tube. After the small-diameter portion and the inner edges of both ends of the central shaft tube are coated with an adhesive, The diameter part is forced into the inner diameter of the end of the central shaft tube to obtain a completely sealed complete shaft body. Page 14