TW202128448A - Rubber product with printed surface and printing method for forming printed surface on rubber product including a substrate and a printed surface layer printed on the substrate - Google Patents

Abstract

Disclosed is a rubber product with a printed surface. The rubber product includes a substrate and a printed surface layer printed on the substrate. The printed surface layer is formed on a sheet by pre-printing ink containing a rubber material on the sheet in a printing manner and simultaneously preheating the sheet and the printed surface layer; then, the sheet and a raw rubber material are simultaneously placed into a die, and high-temperature and high-pressure molding is performed, so that the raw rubber material is subjected to a vulcanization process to form the substrate; and the printed surface layer and the substrate are fusion-welded with each other in the vulcanization process to further form the rubber product with the printed surface. The printed surface layer of the rubber product has better wear resistance and corrosion resistance.

Description

Rubber product with printing surface and printing method with printing surface formed on rubber product

The invention relates to a rubber product formed with a printing surface and a printing method for forming the printing surface, so that the printing surface layer of the rubber product has better abrasion resistance and corrosion resistance.

The main body of the conventional rubber product or button is a rubber layer 1 to be sheathed in the shell 2. This rubber layer is mainly used for rubber products or buttons used in televisions or electronic products, but does not take the aforementioned as It is only used to illustrate the scope of application and use of the keys of the present invention; because the soft rubber layer itself is so soft that it cannot be printed, it must go through a vulcanization process of heating and pressure, and a bridging reaction process of vulcanization to make the rubber Achieving high elasticity and hardening the surface will produce the fixed shape required for printing. Also, because the process requires heating and pressure, conventionally, the shape is pressed while heating, that is, the rubber is layered. In the male (lower) and female (upper) molds, the required shape is produced before the printing operation is performed. Most of the key protrusions have been shaped to facilitate surface printing, which is the traditional two For Victorian screen printing, if there are special needs, the background color is sprayed first, and then the baking drying process is carried out. In the second printing and baking process, we all know that the surface of the rubber layer must have a fixed shape for printing and coloring. When it is baked for several times, it will be deformed and hardened. Therefore, most conventional printing methods are only single-color printing to ensure the finished product. The yield rate, because each additional color needs to be dried and baked once, and the size of the product will be baked for many times. The second baking will cause the size to change with the development of organic substances, causing the effect of thermal expansion and contraction to become more and more obvious, and the yield rate will also decrease, so that the conventional can only use manual manual printing gradually and carefully one by one. Operation, invisibly increases manufacturing costs, and also affects the entire automated manufacturing process.

In addition, as another example of the Chinese Announcement No. CN2459162Y, the patent discloses a pattern formed on rubber products by means of transfer printing. The pattern is mainly printed on a transfer paper, and then the whole rubber material is combined with the pattern. The transfer paper is placed in a mold at the same time, the raw rubber material is formed through a vulcanization process by means of high temperature and high pressure, and the pattern on the transfer paper is transferred to the rubber product during the forming process. However, this method of using the transfer paper to transfer the pattern to the rubber product mainly uses the adhesive on the transfer paper to directly attach the adhesive to the rubber product in the process of high temperature and high pressure. When the transfer paper is subjected to high temperature and high pressure in the mold, it is easy to cause shrinkage of the transfer paper, and the pattern on the transfer paper is easily deformed. Furthermore, the pattern on the transfer paper is also attached to the rubber product by means of an adhesive, so it is easy to fall off after being rubbed by an external force. After long-term use, it is easy to cause the pattern to wear.

In this regard, how to provide a printing method that forms a more wear-resistant printing surface on rubber products and how to achieve an automated production printing method is the problem to be solved in this case.

The main purpose of the present invention is to provide a rubber product with a printing surface and a printing method with a printing surface formed on the rubber product, so that the printed surface of the rubber product has better abrasion resistance and corrosion resistance.

To achieve the above objective, the present invention first provides a rubber product with a printing surface, the rubber product comprising a substrate and a printing surface layer. The substrate is made of lifetime rubber The base material is formed through a vulcanization process. The printing surface is located above the substrate, and the printing surface layer contains ink made of the same raw rubber material as the substrate, and the printing surface layer and the substrate are welded to each other by means of high temperature and high pressure.

In one embodiment, at least one color is formed on the printed surface layer.

In one embodiment, at least one button area or label area is formed on the printed surface layer.

In one embodiment, the printing surface layer is formed by multi-layer printing.

In order to achieve the above-mentioned object, the present invention further provides a printing method for forming a printing surface on a rubber product. The printing method includes a pre-printing step, a pre-shrinking step, a welding step, and a cutting step. In the pre-printing step, a printing surface layer is formed on a heated and pre-shrunk plate. The printing surface layer is formed on the plate by printing ink containing raw rubber material. The pre-shrinking step is to heat the plate on which the printing surface layer is printed, so that the printing surface layer is pre-shrinked and formed on the plate. The welding step is to simultaneously place the plate printed with the printing surface layer and the whole rubber substrate into a mold, so that the printing surface layer and the raw rubber substrate are adjacent to each other, and the plate is simultaneously placed in the mold. And the raw rubber substrate is subjected to high-temperature and high-pressure molding, so that the raw rubber substrate undergoes a vulcanization process to form a substrate, and during the vulcanization process, the printed surface layer and the adjacent surfaces of the substrate are welded to each other to form a preliminary Embryo. The cutting step is to cut the preform to a predetermined shape to form a rubber product with a printed surface layer.

In one embodiment, the sheet is selected from materials with a higher melting point than raw rubber materials, such as PC, TPU, or PET.

In one embodiment, in the pre-printing step, the plate is formed with The printed surface layer in a variety of colors and patterns.

In one embodiment, in the cutting step, the preliminary embryo may be directly cut in the mold in the mold or the preliminary embryo may be taken out of the mold and then cut.

In one embodiment, the printing method further includes a separation step. The separation step is to remove the plate from the printing surface layer after the primary embryo is formed.

In one embodiment, in the welding step, the two plates with the printed surface layer and one raw rubber substrate are simultaneously placed in the mold, and the raw rubber substrate is placed on the two plates , And make the front and back sides of the raw rubber base material and the printing surface layers on the two plates adjacent to each other.

Compared with the conventional technology, the rubber product formed by the present invention has the following advantages:

1. Since the printed surface layer and the substrate both contain raw rubber material, when the raw rubber material is undergoing the vulcanization process, the printed surface layer and the substrate can be welded to each other, so that the substrate and the printed surface layer can be fused into a whole In addition, in addition to improving the abrasion resistance of the printed surface layer, it also has better corrosion resistance and can also achieve better waterproof effects.

2. In addition to single-sided printing, it is also possible to arrange the two plates with printed surface layers on the front and back sides of the raw rubber substrate, so that the front and back sides of the raw rubber substrate can be achieved. The effect of printing on both sides at the same time.

10‧‧‧Rubber products

11‧‧‧Base

12‧‧‧Printing surface

13‧‧‧Key area

14‧‧‧label area

20‧‧‧Plate

30‧‧‧Rubber base material

40‧‧‧Mould

41‧‧‧Upper mold seat

42‧‧‧Lower mold seat

43‧‧‧Ejector mechanism

50‧‧‧Stamping machine

60‧‧‧First embryo

S1‧‧‧Pre-printing steps

S2‧‧‧Pre-shrinking step

S3‧‧‧Welding steps

S4‧‧‧Separation step

S5‧‧‧Cutting steps

In order to enable your reviewer to further understand the technology, means and effects of the present invention to achieve the intended purpose, the preferred and feasible embodiments are exemplified, and detailed descriptions are made in conjunction with the drawings. I believe the objectives and features of the present invention And advantages, when you can get an in-depth and specific learn.

Fig. 1 is a three-dimensional schematic diagram of the rubber product of the present invention.

Figure 2 is a schematic side view of the rubber product of the present invention.

Figure 3 is a schematic cross-sectional view of the rubber product of the present invention.

Figure 4 is a schematic flow chart of the printing method of the present invention.

Fig. 5 is a three-dimensional schematic diagram of the plate and the printed surface layer of the present invention.

Fig. 6 is an exploded schematic diagram of the plate and the printing surface layer of the present invention.

Fig. 7 is a schematic side view of the plate of the present invention when it is combined with the printed surface layer.

Fig. 8 is a schematic diagram of the plate and the raw rubber material of the present invention being inserted into the mold.

Figure 9 is a schematic diagram of the present invention when the plate is separated from the printed surface.

Fig. 10 is a schematic diagram of a bridging layer formed between the sheet of the invention and the printing surface layer.

Fig. 11 is a schematic diagram of the plate sheet of the present invention and the printing surface layer formed on the substrate at the same time.

Fig. 12 is a schematic diagram of a strip formed by a sheet of the invention and a raw rubber material.

Figure 13 is a schematic diagram of the present invention using double-sided printing.

Fig. 14 is a schematic diagram of the application of multi-color printing on a board according to the present invention.

Fig. 15 is a schematic diagram of the application of three-dimensional printing on a board according to the present invention.

As shown in FIGS. 1 to 3, it is a rubber product with a printing surface of the present invention. The rubber product 10 includes a substrate 11 and a printing surface layer 12. The base 11 is formed from a lifetime rubber material after a vulcanization process. The printing surface layer 12 is composed of ink formed from raw rubber material. The printing surface layer 12 can be pre-formed by printing with different colors of ink, so that the printing surface layer 12 can be formed with different color changes or Is it a pattern or a logo Then, the surfaces of the printed surface layer 12 and the substrate 11 adjacent to each other are welded together by the vulcanization process. At the same time, during the vulcanization process, changes in height can be formed on the rubber product 10, for example, a button area 13 and a label area 14 are formed on the rubber product 10.

As shown in FIGS. 4-9, in order to form the above-mentioned rubber product, the present invention also provides a printing method for forming the printing surface on the rubber product. The printing method includes a pre-printing step S1, a pre-shrinking Step S2, a welding step S3, a separating step S4, and a cutting step S5.

The pre-printing step S1 is mainly to provide a sheet 20, which is made of a material with a melting point higher than that of raw rubber materials, such as PC, TPU or PET, and heat the sheet 20 to produce a pre-shrinkage. Then, the ink containing the raw rubber material is printed on the plate 20 in advance by printing on the plate 20, so that the printing surface 12 is formed on the plate 20, and can be on the printing surface 12 A variety of colors or patterns or labels are formed, such as the button area 13 or the label area 14, and the printing surface layer 12 can also be printed with multiple colors or patterns or labels on the plate 20 by means of multilayer printing. Above, three-dimensional printing may also be formed on the plate 20.

The pre-shrinking step S2 is to pre-shrink the plate 20 on which the printing surface layer 12 is printed by high-temperature heating, so that the printing surface layer 12 is pre-shrinked on the plate 20 into a desired shape. It must be noted that since the plate 20 is made of a material with a higher melting point than the raw rubber material, the plate 20 will not be deformed during the preheating step, and only the printed surface layer 12 will be The plate 20 is deformed by heat shrinkage.

The welding step S3 is after the pre-shrinking step S2, after the printing surface layer 12 is pre-shrinked on the plate 20, and then the plate 20 and the whole rubber substrate 30 are placed into a mold 40 at the same time. So that the printed surface layer 12 and the raw rubber substrate 30 are adjacent to each other, and the mold 40 includes an upper After the inner parts are welded to each other, the initial blank 60 is cut to cut out the shape of the rubber product 10 as predetermined in FIG. 1, so that the printed surface layer 12 can be formed on the rubber product 10. And the cutting step S5 here can directly perform in-mold cutting of the preliminary embryo 50 in the mold 40 or take out the preliminary embryo 60 from the mold 40 and then perform out-of-mold cutting (generally known technology , Which will not be repeated here), can be cut into the rubber product 10.

It is worth mentioning that, since the substrate 11 and the printing surface layer 12 are produced through the vulcanization process through high temperature and high pressure in the mold 40, the adjacent surfaces of the substrate 11 and the printing surface layer 12 are welded to each other as a whole. In this way, not only can the printed surface layer 12 and the substrate 11 be formed with better adhesion, but also the printed surface layer 12 can have better wear resistance and corrosion resistance.

As shown in Figures 10 and 11, in this embodiment, a bridge layer 21 is further provided between the plate 20 and the printed surface layer 12. The bridge layer 21 is mainly used for the printed surface layer 12 and the printed surface layer 12 The sheet 20 is bridged, so that the printed surface layer 12 and the sheet 20 can bridge each other. Furthermore, after the plate 20 and the substrate 11 are subjected to a high-temperature and high-pressure vulcanization process in the mold 40, the plate 20 can be retained on the printing surface layer 12, and then the plate 20 is used to form a printed surface layer 12 The protective layer, in this way, can more effectively improve the abrasion resistance of the printed surface layer 12, and at the same time can make the color of the printed surface layer 12 more vivid. When applied to some special products at the same time, such as outdoor products, control panels, keyboards, etc., products that can resist high grease are required. The plate can prevent these greases from interacting with the aforementioned rubber product 10 (as shown in Figure 1) By direct contact, the service life of the rubber product 10 is prolonged.

As shown in Figures 8 and 12, in this embodiment, the plate 20 and the raw rubber base material 30 are mainly made into a strip type, and printed on the plate 20 are arranged with a plurality of mutually spaced apart The mold base 41 and the lower mold base 42, and the upper mold base 41 and the lower mold base 42 are formed with a predetermined shape, and the mold 40 is set on a punching machine 50 so that the punching machine 50 The upper mold base 41 is pressurized toward the lower mold base 42 so that the upper mold base 41 and the lower mold base 42 are molded with each other, and then the upper mold base 41 and the lower mold base 42 are simultaneously performed Heating causes the raw rubber substrate 30 to undergo a vulcanization process at high temperature and high pressure in the mold 30 to form the substrate 11, and the surface of the substrate 11 will melt during the vulcanization process, due to the printing surface layer 12 and the substrate 11 are all formed of raw rubber material, and have the same material, so that the substrate 11 will be welded with the adjacent surfaces of the printed surface layer 12 during the vulcanization process, so that the printed surface layer 12 and the substrate 11 They are welded to each other to form an integral body, and the substrate 11 can be formed into a predetermined shape in the mold 30 at the same time, so that the printing surface layer 12 is transferred from the plate 20 to the substrate 11.

The separation step S4 is used to separate the plate 20 from the printed surface layer 12. In this embodiment, since the plate 20 and the printed surface layer 12 are formed of different materials, and because the plate The melting point of 20 is higher than the melting point of the printing surface layer 12, so when the plate 20 is subjected to the welding step in the mold 40, the plate 20 and the printing surface layer 12 will not be fused with each other. After the printing surface layer 12 and the base 11 are welded to each other, a preliminary blank 60 is formed. After the mold 40 is cooled, an ejection mechanism 43 can be provided on the lower mold base 42 to utilize the ejection mechanism 43. Move in the direction of the upper mold base 41 to push the plate 20 upward and separate the plate 20 and the printing surface layer 12 from each other. In addition, in this embodiment, the in-mold ejection technology is used to separate the plate 20 and the printed surface layer 12 from each other, but in practical applications, the printed surface layer 12 and the substrate 11 can also be welded to each other and cooled. After that, it is taken out from the mold 40, and then the plate 20 is torn off from the printing surface layer 12, and the same separation step S4 can be achieved.

The cutting step S5 is when the substrate 11 and the printing surface layer 12 are in the mold 40 In this way, the plate 20 and the raw rubber substrate 30 can be dragged into the mold 40 by means of a belt, thereby achieving the effect of automated production. In addition to satisfying mass production, It can also effectively improve production efficiency.

As shown in FIG. 13, in this embodiment, the main effect is to perform double-sided printing on the raw rubber substrate 30 in the mold 40, and it is mainly to provide a double-sided printing on both the front and back sides of the raw rubber substrate 30. The plates 20, and the printed surface layer 12 on each plate 20 and the front and back sides of the raw rubber substrate 30 are arranged adjacent to each other. The high temperature and high pressure vulcanization process is carried out in the mold 40 to achieve The effect of double-sided printing.

As shown in Fig. 14, in this embodiment, it is mainly on a heated and pre-shrinked plate 20, using a screen printing method, and a variety of different screen thicknesses can be used. The sheet 20 is formed with a printing surface layer 12 of various colors and different height changes, so as to achieve a three-dimensional transfer or multi-color transfer effect.

Finally, as shown in Fig. 15, in this embodiment, the ductility of the plate 20 is mainly used, and the plate 20 is pre-shrunk by heating and pressing. At the same time, various shapes, graphics or characters are formed on the plate 20, such as semicircular grooves or rectangular grooves, and then the ink containing the raw rubber material is printed or dripped by screen printing. The printing surface layer 12 is formed by filling in the shapes by injection, so that the plate 20 can also be used to achieve the effect of three-dimensional transfer.

In summary, the present invention mainly uses ink containing raw rubber material to be pre-printed on the plate 20 to form the printing surface layer 12, and the plate 20 printed with the printing surface layer 12 is combined with the raw rubber substrate. The material 30 is put into the mold 40 together, and undergoes a vulcanization process, so that the printed surface layer 12 and the adjacent surfaces of the substrate 11 can be welded to each other, so that the printed surface layer 11 is transferred to On the substrate 12, in addition to increasing the durability of the product, such as resistance to special chemicals, it can also increase the degree of wear resistance. At the same time, multiple colors, patterns or three-dimensional transfers can be performed at the same time, so it can provide Very good usability and manufacturability. It is a completely different organization display and manufacturing method.

The above are detailed descriptions and drawings of the preferred embodiments of the present invention, and are not intended to limit the present invention. All the scope of the present invention should be subject to the following patent scope, and the spirit of the patent scope and similarly modified embodiments Both and similar structures should be included in the present invention.

10‧‧‧Rubber products

11‧‧‧Base

12‧‧‧Printing surface

Claims (10)

A rubber product with a printing surface, including: A substrate, formed from a lifetime rubber-based material through a vulcanization process; and A printing surface layer, the printing surface is located above the substrate, the printing surface layer contains ink made of the same raw rubber material as the substrate, and the printing surface layer and the substrate are welded to each other by means of high temperature and high pressure Become. The rubber product with a brushing surface as described in claim 1, wherein at least one color is formed on the printing surface layer. According to claim 1, the rubber product with a brushing surface, wherein at least one button area or label area is formed on the printing surface layer. The rubber product with a brushed surface as described in claim 1, wherein the printing surface layer is formed by multi-layer printing. A printing method for forming a printing surface on a rubber product, the printing method comprising: In a pre-printing step, a printed surface layer is formed on a heated and pre-shrunk plate, and the printed surface layer is formed on the plate by printing with an ink containing a raw rubber material; A pre-shrinking step, heating the plate on which the printing surface layer is printed, so that the printing surface layer is pre-shrinked and formed on the plate; In a welding step, the plate printed with the printing surface layer and the whole rubber substrate are simultaneously placed in a mold, so that the printing surface layer and the raw rubber substrate are adjacent to each other, and the plate is simultaneously placed in the mold. And the raw rubber substrate is subjected to high temperature and high pressure molding, so that the raw rubber substrate undergoes a vulcanization process to form a substrate, and during the vulcanization process, the printing surface layer and the substrate are adjacent to each other The surfaces of the are welded to each other to form a preliminary embryo; and In a cutting step, the preform is cut to a predetermined shape to form a rubber product with a printed surface layer. According to claim 5, the printing method with a printing surface formed on a rubber product, wherein the sheet is selected from materials having a melting point higher than that of raw rubber materials, such as PC, TPU, or PET. According to claim 5, the printing method for forming a printing surface on a rubber product, wherein, in the pre-printing step, the printing surface layer formed with multiple colors and patterns is used on the plate. The printing method with a printing surface formed on a rubber product according to claim 5, wherein, in the cutting step, the preform can be directly cut in the mold in the mold or the preform can be cut from the mold Take it out and then cut it. According to claim 5, the printing method for forming a printing surface on a rubber product, wherein the printing method further includes a separation step. Remove. The method for printing a rubber product with a printing surface formed on a rubber product according to claim 5, wherein, in the welding step, two of the plates on which the printing surface is formed and a raw rubber substrate are simultaneously inserted into the In the mold, the raw rubber substrate is arranged on the two plates, and the front and back sides of the raw rubber substrate are respectively arranged adjacent to the printing surface layer on the two plates.

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