CN112157603A

CN112157603A - Dry grinding disc capable of enabling thickened grinding disc to be not prone to falling off particles

Info

Publication number: CN112157603A
Application number: CN202011101340.5A
Authority: CN
Inventors: 王兴玺
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-10-09
Filing date: 2020-10-09
Publication date: 2021-01-01

Abstract

The name is a dry grinding plate which makes the thickening grinding plate not easy to fall off particles. Belongs to the technical field of dry grinding plates. The technical problem to be solved is to provide a dry grinding plate which enables the thickened grinding plate not to fall off particles easily. The technical scheme main points of solving this technical problem are that there are abrasive disc granule and base cloth in the dry grinding piece, its characterized in that: and a resin coating is arranged between the abrasive sheet particles and the base cloth. Compared with the prior art, the resin coating improves the strength of the base cloth and strengthens the adhesive force between the abrasive disc particles and the base cloth, so that the technical effect that the abrasive disc particles are not easy to fall off in the high-speed rotating use process after the thickness of the thickened abrasive disc particles is achieved.

Description

Dry grinding disc capable of enabling thickened grinding disc to be not prone to falling off particles

Technical Field

The invention relates to the technical field of abrasive discs, in particular to dry abrasive discs.

Background

Presently, dry abrasive discs are used in a wide variety of applications and are not described in detail in relation to the well known situation in the field of dry abrasive discs. The two patent documents exemplified below have made relatively more reference to the industry knowledge of dry abrasive sheets.

The existing diamond dry grinding plate can only be made to be very thin in order to easily dissipate heat, and only can be ground for a short time, so that the temperature rise of the dry grinding plate can not be too high. For the working requirements of large processing grinding amount, fast temperature rise, high temperature and long grinding time, some documents also mention thickening the grinding plate and improving the heat resistance of the grinding plate. However, such a blade has a disadvantage. The disadvantage is that the grinding plate particles are easy to fall off in the use of high-speed rotation because of thickening of the grinding plate particles. The application with the publication number of CN101722478A improves the heat resistance of the abrasive sheet per se, and discloses a diamond dry abrasive sheet. In addition, the application of the patent CN201510243897.5 not only improves the heat resistance of the dry grinding plate, but also can absorb most of heat generated in grinding, and directly reduces the grinding temperature.

However, the above-mentioned two patent applications, as well as other prior art, do not solve the problem that the blade particles are easily released at high-speed rotation after the blade is thickened.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a dry grinding plate which enables a thickened grinding plate not to fall off particles easily.

The invention solves the technical problem by adopting the technical scheme that the dry grinding disc is provided with grinding disc particles and base cloth, and is characterized in that: and a resin coating is arranged between the abrasive sheet particles and the base cloth.

In the scheme, the resin in the resin coating is thermosetting resin which can be cured into a non-meltable state, such as epoxy resin, novolac epoxy resin, phenolic resin, unsaturated polyester resin, organic silicon resin, acrylic resin or vinyl resin; or other resins with equal effect, or mixed resins with equal effect.

Compared with the prior art, the resin coating improves the strength of the base cloth and strengthens the adhesive force between the abrasive disc particles and the base cloth, thereby achieving the technical effect that the abrasive disc particles are not easy to fall off in the use process of high-speed rotation after the thickness of the thickened abrasive disc particles is reached.

Emphasis is given to:

1. the resin contained in the abrasive flake particles and the resin as the coating layer have different technical effects, and the resin in the abrasive flake particles mainly functions in combination with the adhesion of the abrasive component for grinding. The coating resin is mainly used for enhancing the overall strength of the base cloth and enhancing the bonding strength between the abrasive disc particles and the base cloth.

2. Before the mold is used for manufacturing the abrasive disc particles, resin is coated on the surface of the base cloth to form a resin coating, and when the mold is pressed on the resin coating of the base cloth to manufacture the abrasive disc particles (namely, the abrasive disc particles are manufactured before the resin is cured), the paste state of the abrasive disc particles before curing and forming and coating resin which is not cured are mutually bonded and cured together, so that the effect that the abrasive disc particles are not easy to fall off can be achieved more firmly.

3. The coating resin is located on the surface of the base cloth between the base cloth and the abrasive sheet particles, but not on the other side of the base cloth (not on the bottom surface of the base cloth). The base cloth (i.e. carrier) is cotton cloth or canvas or hook layer cloth, etc., and the base cloth does not comprise a connecting piece such as a magic tape, etc. The abrasive sheet particles, the resin coating, and the backing together comprise an abrasive layer (the abrasive layer comprising a carrier backing). And (3) gluing the bottom surface of the base cloth to ensure that the grinding material layer is fixedly connected with a connecting piece (Velcro, napped cloth and the like) to form a finished dry grinding sheet. The power transmission parts (angle grinder, etc.) are also provided with magic tape napping cloth, etc. so that the napped surfaces and the hook surfaces of the two magic tapes are mutually attached and hooked together; the external power transmission spare of abrasive disc connecting piece realizes the abrasive disc and rotates. If the abrasive material layer and the connecting piece are fixedly connected by resin (namely, resin is coated on the bottom surface of the base cloth), the position for coating the resin (and the bonding structure formed between the resin coating and the related body) is different from the position for coating the resin in the scheme, and the technical effect of the scheme cannot be achieved only by the fixed connection of the resin between the abrasive material layer and the connecting piece.

4. The scheme is not only favorable for thickening the grinding plate particles, but also is characterized in that the grinding plate particles are not easy to fall off when the grinding plate is used after thickening, and the grinding plate particles can be easily fallen off when rotating at high speed although the previous technology can thicken the grinding plate particles (and improve the heat resistance of the grinding plate particles).

5. The scheme not only supports large grinding amount and long grinding time, but also ensures firm adhesion between the abrasive disc particles and the base cloth and ensures that the abrasive disc particles are not easy to fall off in the using process.

Drawings

Fig. 1 is a schematic diagram of one of the present solutions.

Fig. 2 is a schematic diagram of one of the present solutions.

Other equivalent figures can be listed according to different embodiments of the scheme.

In the figure: 1. grinding the particles; 2. a resin coating; 3. a base cloth.

The particles of the scheme refer to abrasive disc particles, and the abrasive disc particles are abrasive disc grinding block particles. The abrasive sheet particles may have different shapes, numbers and arrangements and are not limited to those shown in the drawings.

Detailed Description

The preferred embodiments of the present invention will be described below by way of example with reference to the accompanying drawings.

The first embodiment is as follows:

the bottom surface of the canvas as the base cloth 3 and the napped cloth as the connecting piece are firstly bonded together by universal glue (neoprene), and then directly cut into a circular ring shape. And then coating the surface of the canvas serving as the base cloth 3 with the compounded resin (the resin coating 2), assembling a forming die (buckled and pressed on the base cloth 3), coating the forming material into the die in a scraping way to form a plurality of abrasive disc particles 1, and curing together (simultaneously) to obtain a dry abrasive disc finished product.

The resin coating 2 has the functions of enhancing the adhesive force, enhancing the overall strength of the base cloth 3 and enhancing the adhesive strength between the abrasive sheet particles 1 and the base cloth 3.

Without the resin coating layer, the thickness of the grinding plate particles is generally below 3 mm, although thicker grinding plate particles can be made, after the grinding plate is made thicker, the grinding plate particles are easy to fall off under the driving of a high-speed rotation 11000 revolutions of a polishing machine. With the resin coating of the scheme, the thickness of the grinding plate particles can be more than 3.5 millimeters. The thickness figures mentioned here are not limiting dimensions, but merely illustrate that the addition of the resin coating layer according to the present invention in the prior art will increase the thickness of the abrasive sheet, and the abrasive sheet particles will not be easily removed during use after the increase in thickness.

Co-curing (simultaneous curing) means that after the coating resin and the abrasive flake particle slurry are fused together and firmly bonded, they are naturally cured or heat-cured. The abrasive article is pressed against the base fabric without the applied resin curing. The mould is a hollow mould with geometric figures (gaps) made of iron plates, bakelite plates or rigid plates.

The slurry composition of the refiner plate particles 1 is a combination of any of a number of raw materials known in the industry. Examples are: resin binder (multifunctional high temperature resistant synthetic resin, such as epoxy resin, phenolic resin, and novolac epoxy resin, such as F51, F44, AG80, etc.); grinding materials: diamond powder; filling materials: silicon carbide; dry grinding of the lubricant: and (3) polytetrafluoroethylene micro powder. The proportions of the various raw materials are also known in the industry and there are a number of prior references. The types of ingredients are used herein by way of example only and are not intended to be limiting.

Example two:

after the abrasive disc particles 1 are firstly molded on cotton cloth serving as base cloth 3 through the resin coating 2, magic tapes serving as connecting pieces are adhered together by Pur hot melt adhesive, and an annular dry abrasive disc is cut by an annular punching knife.

In general, the abrasive disc needs to be naturally cured for 3-36 hours at room temperature, or put into an oven and cured for 1-42 hours at 60-300 ℃.

In general, the loop surface of the hook and loop fastener for the back surface of the dry grinding plate is also called a napped cloth loop surface. The angle grinder is provided with a magic tape hook surface matched with the grinding sheet to hook the back surface of the grinding sheet for use. The magic tape is formed by mutually sticking and hooking a rough surface and a hook surface.

Claims

1. The utility model provides a make dry grinding piece of bodiness abrasive disc difficult for granule that drops, has abrasive disc granule (1) and base cloth (3) in the dry grinding piece, its characterized in that: a resin coating (2) is arranged between the grinding piece particles (1) and the base cloth (3).