TWI733242B - Emery cloth wheel cover body with built-in fiber net and its manufacturing process - Google Patents

Abstract

The invention relates to an abrasive cloth wheel cover with built-in fiber net and its manufacturing process. The abrasive cloth wheel cover includes a fiber net and a cover body, wherein the fiber net is in a grid shape, and a first shaft is provided in the middle area of the fiber net. Hole, the cover body can inject the plastic out of the fiber web integrally by injection molding, and at least cover the corresponding top and bottom surfaces of the fiber web, wherein the middle area of the cover body is provided with a second The shaft hole, the second shaft hole will correspond to the first shaft hole, and its diameter can be less than or equal to the diameter of the first shaft hole. In this way, the fiber mesh built into the cover body can be used in the emery cloth When the thickness of the wheel cover is thin, it still maintains good structural strength and toughness. At the same time, the abrasive cloth wheel cover itself can also have greater elasticity and deformation.

Description

Abrasive cloth wheel cover body with built-in fiber net and its manufacturing process

The present invention relates to an emery cloth wheel cover body, in particular to an emery cloth wheel cover body which is integrally manufactured on the outer edge of the fiber web by injection molding and its manufacturing process.

According to this, as modern people’s requirements for the quality of life become higher and higher, when people buy various products, in addition to the practicality of the product, the appearance of the product has also become one of the important indicators of people’s purchase. Therefore, the industry often needs to specialize The exterior surface of the product is polished to gain the favor of consumers.

Generally speaking, the industry usually uses "abrasive wheels (or louvers, louvers)" to grind the surface of an object, so that the object can form a predetermined shape, maintain the expected smoothness, or remove the welding points on the surface of the object. , Rust spots... etc. Among them, the emery cloth wheel is generally stacked on a disc-shaped base, and a plurality of emery cloth sheets are sequentially stacked, so that the emery cloth sheets can be arranged in a ring around one side of the base And, the other side of the base will be covered with a cover to be able to abut the emery cloth sheets and make the emery cloth sheets closely adhere to each other. In this way, the staff only needs to assemble the emery cloth wheel On a device (such as a grinder), an object to be ground (such as metal, glass, stone, etc.) can be brought close to the front of the emery cloth sheets (that is, the direction facing away from the base), The emery cloth sheets can remove the roughness of the surface of the object to be abraded, so that the surface of the object can be kept bright, smooth and fine.

In addition, the covers currently used for abrasive cloth wheels can be roughly divided into "plastic covers" and "fiber covers", but the aforementioned covers have the following deficiencies in actual use:

(1) "Plastic cover", which is usually manufactured by integral injection molding of plastic. However, the inventor found that the aforementioned plastic cover can maintain structural strength and toughness to avoid bending and breaking due to external forces, so its thickness will be reduced. It is thicker and less elastic. Therefore, the emery cloth wheel with this plastic cover cannot grind too large curved surfaces. After all, the emery cloth sheet will be blocked by the cover and cannot be bent too much; secondly, Since the plastic cover is thicker, it cannot be consumed simultaneously with the wear of the emery cloth sheet, causing the emery cloth sheet to be obstructed by the oversized plastic cover during grinding, which affects the grinding efficiency and convenience;

(2) "Fiber cover", which is made up of multiple fiber layers (such as glass fiber). However, the inventor found that the fiber layers are used for bonding under long-term storage. Phenolic resin will soften, which will separate the fiber layers from each other and become unusable. Secondly, the thickness of the fiber cover is not easy to maintain uniformity. After all, the thickness of each fiber layer depends on the quality of production, and the thickness of each fiber layer depends on the quality of production. The thickness of the phenolic resin coated on a fiber layer and the thickness formed by the phenolic resin after hardening are not easy to control, so that after the subsequent fiber cover abuts on the emery cloth sheet, the abrasive surface formed by the emery cloth sheet is easy to be uneven.

In summary, how to design a new cover structure that can solve the aforementioned shortcomings and provide staff with better experience in use has become an important issue for many companies in the design and manufacture of abrasive cloth wheels.

In view of the fact that there is still room for improvement in the cover body of the conventional grinding wheel, the inventor, relying on years of practical experience, and after many experiments and researches, finally designed a tool of the present invention. The emery cloth wheel cover with built-in fiber net and its manufacturing process are expected to provide users with better products.

An object of the present invention is to provide an abrasive cloth wheel cover with a built-in fiber net, comprising a fiber net and a cover body, wherein the fiber net is in the shape of a grid, and the middle area is provided with a first shaft hole. The cover The main body can be integrally shot out of the fiber web by injection molding, and at least covers the corresponding top and bottom surfaces of the fiber web, wherein the middle area of the cover body is provided with a second shaft hole, the The second shaft hole corresponds to the first shaft hole, and its diameter is less than or equal to the diameter of the first shaft hole. In this way, the fiber mesh built into the cover body can be used in the abrasive cloth wheel cover body. In the case of thinner thickness, it still maintains good structural strength and toughness.

Another object of the present invention is to provide an emery cloth wheel cover process with built-in fiber mesh, which includes the following steps. Firstly, a fiber mesh is placed in an injection molding mold, and then, in the injection molding method, the injection molding is performed. Plastic is injected into the mold to cover at least the corresponding top and bottom surfaces of the fiber net. Finally, after the plastic is cooled and hardened, a cover body is formed outside the fiber net, wherein the abrasive cloth wheel cover body A shaft hole is formed in the middle area. In this way, by the manufacturing process of the present invention, the fiber mesh can be quickly arranged in the cover body, and at the same time, the thickness and shape of the abrasive cloth wheel cover body can be precisely controlled.

In order to facilitate your reviewers to have a further understanding and understanding of the purpose, technical features and effects of the present invention, the examples and diagrams are described in detail as follows:

[Learning]

no

〔this invention〕

1, 1'‧‧‧Eraser cloth wheel cover

11、11'‧‧‧Fiber mesh

110‧‧‧The first shaft hole

12, 12'‧‧‧Cover body

120、120'‧‧‧Second axis hole

31‧‧‧Erasing cloth sheet

32‧‧‧Pedestal

320‧‧‧Base shaft hole

33‧‧‧Transfer Reinforcement Disk

330‧‧‧Third shaft hole

34‧‧‧Combined components

340‧‧‧Combination hole

Figure 1 is a schematic cross-sectional view of the emery cloth wheel cover of the present invention;

Figure 2 is a schematic diagram of the fiber web of the present invention;

Figure 3 is a production flow chart of the emery cloth wheel cover of the present invention;

Figure 4 is an exploded schematic diagram of the emery cloth wheel cover of the present invention and its products; and

Figure 5 is a schematic cross-sectional view of an abrasive cloth wheel cover according to another embodiment of the present invention.

The present invention is an abrasive cloth wheel cover with built-in fiber mesh and its manufacturing process. In one embodiment, please refer to Figures 1 and 2. The abrasive cloth wheel cover 1 can at least consist of a fiber mesh 11 and a cover body. For the convenience of explanation, the upper position in Figure 1 is used as the top surface position of the element, and the lower position in Figure 1 is used as the bottom surface position of the element. In addition, the fiber web 11 is in a grid shape and the middle area A first shaft hole 110 is provided. In this embodiment, the fiber web 11 is made of glass fiber, but it is not limited to this. The industry can switch to carbon fiber or other materials according to product and production requirements. Chen Ming.

Continuing, please refer to Figure 1 again. The lid body 12 can be injection-molded to integrally inject plastic onto the fiber web 11, and at least cover the top and bottom surfaces of the fiber web 11. In this embodiment, the plastic completely covers the fiber mesh 11, and a second shaft hole 120 is provided in the middle area of the cover body 12, and the second shaft hole 120 corresponds to the first shaft hole 110, In this embodiment, since the plastic completely covers the fiber web 11, the diameter of the second shaft hole 120 is smaller than the diameter of the first shaft hole 110. However, when the plastic only covers the fiber When the net 11 has the top surface and the bottom surface, the diameter of the second shaft hole 120 is equal to the diameter of the first shaft hole 110.

To illustrate the manufacturing process of the aforementioned abrasive cloth wheel cover 1 in detail, please refer to Figures 1 and 3:

(201) Put the fiber web 11 into an injection molding mold, where the fiber web 11 can be a single layer or multiple layers, and then go to step (202);

(202) Inject plastic (such as nylon, PP, etc.) into the injection molding mold, and the plastic can at least cover Cover the top and bottom surfaces of the fiber web 11 without completely covering the first shaft hole 110. In this embodiment, the plastic completely covers the fiber web 11, and then proceed to step (203);

(203) After the plastic is cooled and hardened, the cover body 12 is formed outside the fiber web 11, wherein the middle area of the cover body 12 forms a second shaft hole 120.

In summary, the abrasive cloth wheel cover 1 formed by the aforementioned manufacturing process can have the following effects:

(A1) Because the cover body 12 has the fiber mesh 11, the thickness of the cover body 12 does not need to be too thick (compared to the conventional plastic cover), and the abrasive cloth wheel cover 1 can still have sufficient strength And toughness, please refer to Figure 4, when one end of a plurality of emery cloth sheets 31 is fixed to one side surface of a base 32, and the emery cloth wheel cover 1 is closed to the other side surface of the base 32 Later, since the overall thickness of the abrasive cloth wheel cover 1 is relatively thin, it can have greater elasticity (deformation). Therefore, when the abrasive cloth sheets 31 grind larger curved surfaces, the abrasive cloth wheel cover 1 is sufficient As the emery cloth sheets 31 bend;

(A2) Since the overall thickness of the emery cloth wheel cover 1 is relatively thin, it can be consumed simultaneously with the emery cloth sheets 31 during the grinding process without affecting the grinding efficiency and convenience of the emery cloth sheets 31 ；

(A3) Since the fiber web 11 is wrapped in the cover body 12, the problem of separation of the conventional fiber cover will not occur under long-term use; and

(A4) Since the cover body 12 is covered on the fiber web 11 by injection molding, the industry can easily control the overall thickness and shape of the abrasive cloth wheel cover 1 to meet product requirements.

In addition, although in Figure 4, the emery wheel cover 1 and the base 32 belong to different elements. However, in other embodiments of the present invention, the base 32 can also be formed directly on the top surface of the cover body 1 by injection molding, and there are two molding methods. The first is only one injection. The molding process, that is, the base 32 and the cover body 12 are injection molded together, and the base 32 will be located on the top surface of the cover body 12; the second type is divided into two injection molding processes, that is, the first The second injection of plastic will form the cover body 12. After that, after the cover body 12 is formed (the plastic has been cooled and hardened), the second injection of plastic will be carried out, so that after the plastic has cooled and hardened, it will be positioned on the top surface of the cover body 12 The base 32 is formed; in addition, a base shaft hole 320 is provided in the middle area of the base 32, and the base shaft hole 320 communicates with the second shaft hole 120.

Furthermore, please refer to Figure 4 again. Since the emery wheel is fixed to a device (such as a hand-operated machine), the industry usually adds an adapter and reinforcement plate 33 to the emery wheel. In the present invention In other embodiments, the transfer reinforcing plate 33 can also be formed on the top surface of the cover body 1 by injection molding, and there are two molding methods. The first one is a one-shot injection molding process, that is, the transfer The reinforcing plate 33 and the cover body 12 are injection-molded together, or the adapting and reinforcing plate 33 can be injection-molded together with the cover body 12 and the base 32 at the same time, and the adapting and reinforcing plate 33 will be located in the corresponding cover body. The top surface position of 12, for example, is directly located on the top surface of the cover body 12 or indirectly located on the top surface of the cover body 12 (that is, the adapter plate 33 is located on the top surface of the base 32); the second type is divided into multiple The secondary injection molding process, that is, after the cover body 12 and/or the base 32 are manufactured by injection molding, the next injection of plastic is performed, so that after the plastic has cooled and hardened, it can be directly or directly or directly at the position corresponding to the top surface of the cover body 12 The adapter and reinforcement plate 33 is formed indirectly; in addition, a third shaft hole 330 is provided in the middle area of the adapter and reinforcement plate 33, and the third shaft hole 330 communicates with the second shaft hole 120.

Please refer to Figure 4 again. When the industry uses multiple injection molding methods to form the cover body 12, the base 32 and the adapter plate 33 respectively, the cover body 12, the base 32 and the rotating The plastic materials used for the reinforcing plate 33 can be the same or different, so that the abrasive cloth wheel cover 1 of the present invention can have more abundant changes according to different work requirements. In addition, when the existing abrasive cloth wheel cover is assembled to a hand tool (such as a corner joint machine), a shaft of the hand tool is usually inserted through the first and second shaft holes, and then a coupling element (such as a nut) is additionally assembled. , The emery cloth wheel cover is fixed between the hand tool and the coupling element. However, the aforementioned assembly method is still not convenient enough. Therefore, in order to increase the convenience of assembly, the inner wall of the second shaft hole 120 can be provided with Internal thread, so that it can be directly locked to the hand tool. In addition, please refer to Figure 5. In another embodiment of the present invention, the cover body 12' can be fixed on the fiber web 11' by injection molding, and the second axis of the cover body 12' The hole 120' will correspond to the first shaft hole of the fiber web 11'. In addition, a coupling element 34 (such as a nut) can be fixed to the top surface of the cover body 12', and a coupling hole 340 ( Such as: screw hole), the coupling hole 340 will correspond to the second shaft hole 120' to communicate with the second shaft hole 120'. In this other embodiment, the coupling element 34 can be used in the aforementioned steps After (203), plastic is shot out of the periphery of the coupling element 34, but will not cover the coupling hole 340. After the plastic is cooled, the coupling hole 340 can be fixed to the cover body 12'. Personnel can quickly assemble the emery cloth wheel cover 1'to a hand tool (such as a corner joint machine).

According to, the above are only the preferred embodiments of the present invention. However, the scope of rights claimed by the present invention is not limited to this. Anyone familiar with the art can use the technical content disclosed in the present invention. Easily considered equivalent changes should fall within the scope of protection of the present invention.

1‧‧‧Eraser cloth wheel cover

11‧‧‧Fiber Mesh

110‧‧‧The first shaft hole

12‧‧‧Cover body

120‧‧‧Second shaft hole

Claims (6)

An emery cloth wheel cover body with built-in fiber net is applied to an emery cloth wheel, comprising: a fiber net, which is in a grid shape, and a first shaft hole is provided in the middle area; and a cover body, which is formed by injection molding In this way, the plastic is integrally shot out of the fiber web, and at least covers the corresponding top and bottom surfaces of the fiber web, wherein the middle area of the cover body is provided with a second shaft hole, the second shaft hole will be Corresponding to the first shaft hole, and the diameter of the second shaft hole is less than or equal to the diameter of the first shaft hole; and a base, which is also formed by injection molding at a position corresponding to the top surface of the cover body, And the middle area is provided with a base shaft hole, and the base shaft hole communicates with the second shaft hole. The emery cloth wheel cover body as described in claim 1 further includes an adapter and reinforcement plate, which is also injection-molded and formed on the top surface of the cover body, and the middle area is provided with a third A shaft hole, the third shaft hole communicates with the second shaft hole. The abrasive cloth wheel cover according to claim 1, wherein the diameter of the second shaft hole is smaller than the diameter of the first shaft hole, and the inner wall of the second shaft hole is provided with an internal thread. An emery cloth wheel cover process with built-in fiber net includes: placing a fiber net in an injection molding mold, wherein a first shaft hole is provided in the middle area of the fiber net; Plastic is injected into the mold to cover at least the corresponding top and bottom surfaces of the fiber web without completely covering the first shaft hole; and after the plastic is cooled and hardened, a shape is formed outside the fiber web The cover body and a base, wherein a second shaft hole is provided in the middle area of the cover body, the second shaft hole corresponds to the first shaft hole, and the diameter of the second shaft hole is smaller than or equal to the diameter of the first shaft hole , The base is formed on the top surface of the cover body, a base shaft hole is provided in the middle area, and the base shaft hole communicates with the second shaft hole. The emery cloth wheel cover process according to claim 4, wherein after the cover body and the base are formed, plastic is injected into the injection mold again to form a position corresponding to the top surface of the cover body After the plastic is cooled and hardened, it will be formed in the form of a transfer reinforcement disk, wherein the middle area of the transfer reinforcement disk is provided with a third shaft hole, and the third shaft hole will be in contact with the The second shaft hole communicates with each other. The emery cloth wheel cover system according to claim 5, wherein the plastic material of the cover body is the same as that of the adapter and reinforcement disk.

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