CN103406836B - High-precision sponge sand and manufacturing method thereof - Google Patents

Abstract

The invention relates to the technical field of grinding tools, in particular to high-precision sponge sand and a manufacturing method thereof, which comprises the following steps of selecting a sponge substrate layer; preparing a grinding material and glue mixture; selecting a film layer, and blade-coating the abrasive material and glue mixture prepared in the step two on the film layer to form an abrasive material and glue mixture layer on the film layer; drying the thin film layer coated with the grinding material and glue mixture layer in a scraping mode to dry glue in the grinding material and glue mixture layer, and exposing the grinding material layer in the grinding material and glue mixture layer to the surface of a glue layer after the glue is dried; bonding the film layer processed in the fourth step with the sponge base material layer to obtain a high-precision sponge sand finished product; according to the invention, the superfine grinding materials with the particle size of 240-2500 meshes can be compounded on the sponge base material to prepare the high-precision sponge sand, and the sponge sand not only has the superfine grinding function, but also has a smooth grinding material layer, high grinding material utilization rate and long service life.

Description

A kind of high-precision sponge sand and its manufacturing method

technical field

The invention relates to the technical field of grinding tools, in particular to a high-precision sponge sand and a manufacturing method thereof.

Background technique

The commonly used coated abrasives can be divided into two categories according to the base material classification:

1. Paper substrate: It is the most traditional production process. It is made by coating various hard abrasives on the paper substrate. The advantages of this type of product are: cheap, easy to produce; Not good enough, slow heat dissipation, uneven grinding force on the processed workpiece, unsatisfactory precision machining;

2. Cloth base material: it is made by coating various hard abrasives on the cloth base. The basic performance of this type of product is similar to that of paper products. The advantages are: high tensile strength, no deformation, and higher grinding force than Paper-based products are stronger.

Today's products have more and more stringent requirements for grinding precision machining, and a new type of base material sand product is derived. Sponge base sandpaper, commonly known as sponge sand, is based on sponge elastic body and coated with a It is a high-grade grinding tool made of a layer of abrasive material that is bendable, has good elasticity, fast heat dissipation, and can be polished without scratches.

During the production process of the existing sponge sand, due to the sponge foam holes on the surface of the sponge substrate, the liquid glue used in the production process and abrasives with a particle size smaller than the sponge foam hole diameter will penetrate into the sponge foam holes , resulting in waste of glue and abrasives, shortening the service life of the sponge sand, and the abrasives appear uneven on the surface of the sponge base material, when the sponge sand produced by this process is used to process the product, it will cause the workpiece to be processed. Abrasive scratches.

Especially for some workpieces that need to be finely polished, it is necessary to use sponge sand with an abrasive particle size of more than 1000 mesh. However, the current sponge sand is limited by the size of the foam pores of the sponge, and its abrasive particle size can only be about 240 mesh. , has seriously restricted the development of the fine grinding industry, so there is an urgent need for a high-precision sponge sand with an abrasive particle size of more than 1000 mesh on the market.

Contents of the invention

The present invention provides a high-precision sponge sand in order to overcome the above defects. The abrasive glue mixture layer of the sponge sand is smooth and smooth, the abrasive utilization rate is high, the service life is long, and the particle size of the abrasive can reach 2500 mesh, which can improve the grinding efficiency. and improve processing precision.

To achieve the above object, the present invention adopts the following technical solutions:

A method for manufacturing high-precision sponge sand, comprising the following processing steps:

Step 1. Select the sponge substrate layer;

Step 2. Prepare the abrasive glue mixture, weigh the raw materials of the formula and pour them into a clean container and stir evenly;

Step 3, select the film layer, scrape the abrasive glue mixture prepared in step 2 on the film layer, so that an abrasive glue mixture layer is formed on the film layer;

Step 4, drying the film layer coated with the abrasive glue mixture layer to dry the glue in the abrasive glue mixture layer; after the glue is dried, the abrasive layer in the abrasive glue mixture layer exposes the surface of the glue layer; wherein, drying The temperature is 70-120℃, and the drying time is 40-80min;

Step 5, bonding the film layer treated in step 4 with the sponge substrate layer to obtain a high-precision sponge sand product.

Wherein, the abrasive glue mixture comprises the following raw materials:

Main agent, the main agent is composed of 1-6 parts of abrasive, 1-2 parts of glue and 2-6 parts of thinner;

The anti-sedimentation agent is 2%-5% of the total weight of the main agent,

The dispersant is 1%-4% of the total weight of the main agent,

The leveling agent is 2%-6% of the total weight of the main agent.

Further, the abrasive glue mixture includes the following raw materials:

Main agent, the main agent is composed of 2-5 parts of abrasive, 1 part of glue and 3-5 parts of diluent;

The anti-sedimentation agent is 2%-4% of the total weight of the main agent,

The dispersant is 1%-3% of the total weight of the main agent,

The leveling agent is 2%-4% of the total weight of the main agent.

Wherein, the abrasive is one of white corundum abrasive, brown corundum abrasive, silicon carbide abrasive, zirconium corundum abrasive or glass abrasive or a mixture of more than one mixed in a certain proportion.

Wherein, the particle size of the abrasive is 240-2500 mesh.

Wherein, the glue is the glue of model 909AB-R manufactured by Dongguan Huachuang Resin Co., Ltd.

Wherein, the sponge substrate layer is a sponge substrate layer of model DD-100 manufactured by Dongda Sponge Factory in Baoan District, Shenzhen.

Wherein, the film layer is an elastic hot melt adhesive film layer, an elastic plastic film layer or a TPU film layer.

Another technical solution of the present invention is as follows:

The high-precision sponge sand manufactured by a kind of high-precision sponge sand manufacturing method of the above technical scheme.

Wherein, the thickness of the sponge substrate layer is 3-7 mm, the thickness of the film layer is 0.08-0.15 mm, and the thickness of the abrasive glue mixture layer is 0.05-0.3 mm.

The beneficial effect of the present invention is: a kind of high-precision sponge sand of the present invention, after laying the abrasive glue mixture layer on the film layer and drying and molding, then lay the film layer with the abrasive glue mixture layer on the sponge substrate layer , forming high-precision sponge sand; the high-precision sponge sand avoids the liquid glue and abrasives whose particle diameter is smaller than that of the sponge foam hole from the sponge foam hole into the sponge substrate layer. waste, and the unevenness of the abrasive layer; the particle size of the abrasive of the present invention can reach up to 2500 meshes, the abrasive layer on the surface of the sponge sand is smooth and smooth, the abrasive utilization rate is high, the service life is long, and the grinding efficiency can be improved. It has the function of ultra-fine grinding.

Description of drawings

The present invention will be further described with the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention.

Fig. 1 is a structural representation of a high-precision sponge sand of the present invention.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and embodiments, which are preferred embodiments of the present invention.

Example 1.

A kind of manufacturing method of high-precision sponge sand of the present embodiment comprises the following processing steps:

Step 1, select the sponge substrate layer 1;

Step 2. Prepare the abrasive glue mixture, weigh the raw materials of the formula and pour them into a clean container and stir evenly;

Step 3, select the film layer 2, scrape the abrasive glue mixture prepared in step 2 on the film layer 2, and form an abrasive glue mixture layer 3 on the film layer 2;

Step 4, drying the film layer 2 coated with the abrasive glue mixture layer 3 to dry the glue in the abrasive glue mixture layer 3; after the glue is dried, the abrasive material layer 32 in the abrasive glue mixture layer 3 exposes the glue layer 31 surface; wherein, the drying temperature is 80°C, and the drying time is 60 minutes;

Step 5, bonding the film layer 2 treated in step 4 with the sponge substrate layer 1 to obtain a high-precision sponge sand product.

The abrasive glue mixture of the present embodiment comprises the following raw materials:

Main agent, the main agent is composed of 4 parts of abrasive, 1 part of glue and 4 parts of thinner;

Anti-settling agent is 3% of the total weight of main agent,

The dispersant is 2% of the total weight of the main agent,

The leveling agent is 3% of the total weight of the main agent.

As a preferred technical solution, the abrasive in this embodiment is brown corundum abrasive, the main component is alumina, which has medium hardness, high toughness, sharp particles, relatively low price, and is suitable for processing workpieces with high expansion strength.

As a preferred technical solution, the particle size of the abrasive in this embodiment is 2500 mesh.

The glue of this embodiment is the glue of model 909AB-R manufactured by Dongguan Huachuang Resin Co., Ltd.

The sponge substrate layer 1 of this embodiment is a sponge substrate layer of model DD-100 manufactured by Dongda Sponge Factory, Baoan District, Shenzhen.

As a preferred technical solution, the film layer 2 of the present embodiment is an elastic hot-melt adhesive film layer, and the hot-melt adhesive is a plastic adhesive. The characteristics remain unchanged, it is non-toxic and tasteless, and it is an environmentally friendly chemical product. The elastic hot-melt adhesive film layer made of hot-melt adhesive not only has the advantages of hot-melt adhesive, but also has the same elastic coefficient as the sponge substrate layer 1. Elasticity, the elastic hot melt adhesive film layer is closely bonded to the sponge substrate layer 1 and is not easy to fall off.

A kind of high-precision sponge sand manufactured by a kind of high-precision sponge sand manufacturing method of the present embodiment includes a sponge base material layer 1, and a film layer 2 is arranged on the upper surface of the sponge base material layer 1, and the film layer 2 The upper surface is provided with an abrasive glue mixture layer 3 , the abrasive glue mixture layer 3 includes a glue layer 31 and an abrasive layer 32 , and the upper middle part of the abrasive layer 32 exposes the glue layer 31 .

Wherein, the thickness of the sponge substrate layer 1 is 7 mm, the thickness of the film layer 2 is 0.15 mm, and the thickness of the abrasive glue mixture layer 3 is 0.05 mm.

The high-precision sponge sand of this embodiment has high processing efficiency and is suitable for fine grinding.

Experiments have proved that the continuous grinding time of ordinary sponge sand is 30 minutes, while the continuous grinding time of a high-precision sponge sand of this embodiment reaches 180 minutes, which is 6 times the service life of common sponge sand.

Example 2.

A kind of manufacturing method of high-precision sponge sand of the present embodiment comprises the following processing steps:

Step 1, select the sponge substrate layer 1;

Step 2. Prepare the abrasive glue mixture, weigh the raw materials of the formula and pour them into a clean container and stir evenly;

Step 3, select the film layer 2, scrape the abrasive glue mixture prepared in step 2 on the film layer 2, and form an abrasive glue mixture layer 3 on the film layer 2;

Step 4, drying the film layer 2 coated with the abrasive glue mixture layer 3 to dry the glue in the abrasive glue mixture layer 3; after the glue is dried, the abrasive material layer 32 in the abrasive glue mixture layer 3 exposes the glue layer 31 surface; wherein, the drying temperature is 70°C, and the drying time is 80 minutes;

Step 5, bonding the film layer 2 treated in step 4 with the sponge substrate layer 1 to obtain a high-precision sponge sand product.

The abrasive glue mixture of the present embodiment comprises the following raw materials:

Main agent, the main agent is composed of 2 parts of abrasive, 1 part of glue and 3 parts of thinner;

The anti-sedimentation agent is 2% of the total weight of the main agent,

The dispersant is 1% of the total weight of the main agent,

The leveling agent is 2% of the total weight of the main agent.

As a preferred technical solution, the abrasive in this embodiment is white corundum abrasive, its hardness is slightly higher than that of brown corundum, but its toughness is poor, and it is easy to cut into the workpiece during grinding. Strong and efficient.

As a preferred technical solution, the particle size of the abrasive in this embodiment is 1000 mesh.

As a preferred technical solution, the film layer 2 of this embodiment is an elastic plastic film layer, which has good heat sealing properties, and its elasticity is equivalent to the elastic coefficient of the sponge base material layer 1, which can be compared with the sponge base material layer. 1 Tightly combined, not easy to fall off.

The thickness of the sponge substrate layer 1 in this embodiment is 3 mm, the thickness of the film layer 2 is 0.08 mm, and the thickness of the abrasive glue mixture layer 3 is 0.1 mm.

Experiments have proved that the continuous grinding time of the high-precision sponge sand of this embodiment reaches 210 minutes, which is 7 times the service life of ordinary sponge sand.

The rest of this embodiment is the same as Embodiment 1, and will not be repeated here.

Example 3.

A kind of manufacturing method of high-precision sponge sand of the present embodiment comprises the following processing steps:

Step 1, select the sponge substrate layer 1;

Step 2. Prepare the abrasive glue mixture, weigh the raw materials of the formula and pour them into a clean container and stir evenly;

Step 3, select the film layer 2, scrape the abrasive glue mixture prepared in step 2 on the film layer 2, and form an abrasive glue mixture layer 3 on the film layer 2;

Step 4, drying the film layer 2 coated with the abrasive glue mixture layer 3 to dry the glue in the abrasive glue mixture layer 3; after the glue is dried, the abrasive material layer 32 in the abrasive glue mixture layer 3 exposes the glue layer 31 surface; wherein, the drying temperature is 90°C, and the drying time is 50 minutes;

Step 5, bonding the film layer 2 treated in step 4 with the sponge substrate layer 1 to obtain a high-precision sponge sand product.

The abrasive glue mixture of the present embodiment comprises the following raw materials:

Main agent, the main agent is composed of 5 parts of abrasive, 1 part of glue and 5 parts of thinner;

Anti-settling agent is 4% of the total weight of main agent,

The dispersant is 3% of the total weight of the main agent,

The leveling agent is 4% of the total weight of the main agent.

As a preferred technical solution, the abrasive in this embodiment is silicon carbide abrasive, the main component is silicon carbide, which has high hardness, high brittleness, sharp abrasive grains and good wear resistance, and is more suitable for processing hard and brittle metal and non-metal products. . It is suitable for surface deburring, chamfering, descaling and surface polishing of products in industries such as machinery, electronics, metal parts, hardware, tools, auto parts, instruments and meters, casting, medical treatment, and craft jewelry. The abrasive has high grinding efficiency, wear resistance and durability, is not easy to get stuck, and has a high surface brightness.

As a preferred technical solution, the particle size of the abrasive in this embodiment is 1500 mesh.

As a preferred technical solution, the film layer 2 of this embodiment is a TPU film layer. TPU, thermoplastic polyurethane elastomer. The so-called elastomer refers to a polymer material with a glass transition temperature lower than room temperature, an elongation at break greater than 50%, and better recovery after external force is removed. Polyurethane elastomer is a relatively special category of elastomers. Polyurethane elastomer has a wide range of hardness and performance. Therefore, polyurethane elastomer is a type of polymer material between rubber and plastic. It can be heated and plasticized, with little or no cross-linking in the chemical structure, and its molecules are basically linear, but there are certain physical cross-links. The TPU film layer made of this material has the characteristics of TPU material, and is thermally sealed with the sponge base material layer 1 to be tightly connected and not easy to fall off.

The thickness of the sponge substrate layer 1 in this embodiment is 4 mm, the thickness of the film layer 2 is 0.1 mm, and the thickness of the abrasive glue mixture layer 3 is 0.15 mm.

Experiments have proved that the continuous grinding time of the high-precision sponge sand of this embodiment reaches 210 minutes, which is 7 times the service life of ordinary sponge sand.

The rest of this embodiment is the same as Embodiment 1, and will not be repeated here.

Example 4.

A kind of manufacturing method of high-precision sponge sand of the present embodiment comprises the following processing steps:

Step 1, select the sponge substrate layer 1;

Step 2. Prepare the abrasive glue mixture, weigh the raw materials of the formula and pour them into a clean container and stir evenly;

Step 3, select the film layer 2, scrape the abrasive glue mixture prepared in step 2 on the film layer 2, and form an abrasive glue mixture layer 3 on the film layer 2;

Step 4, drying the film layer 2 coated with the abrasive glue mixture layer 3 to dry the glue in the abrasive glue mixture layer 3; after the glue is dried, the abrasive material layer 32 in the abrasive glue mixture layer 3 exposes the glue layer 31 surface; wherein, the drying temperature is 100°C, and the drying time is 40 minutes;

Step 5, bonding the film layer 2 treated in step 4 with the sponge substrate layer 1 to obtain a high-precision sponge sand product.

The abrasive glue mixture of the present embodiment comprises the following raw materials:

Main agent, the main agent is composed of 3 parts of abrasive, 1 part of glue and 4 parts of thinner;

Anti-settling agent is 3% of the total weight of main agent,

The dispersant is 3% of the total weight of the main agent,

The leveling agent is 3% of the total weight of the main agent.

As a preferred technical solution, the abrasive in this embodiment is a mixture of white corundum abrasive, brown corundum abrasive and silicon carbide abrasive in a weight ratio of 1:1:3. The abrasive mixture has the advantages of high hardness, high toughness, sharp particles, relatively low price, low calorific value, strong grinding ability, high efficiency, good thermal conductivity and high wear resistance.

As a preferred technical solution, the particle size of the abrasive in this embodiment is 500 mesh.

The thickness of the sponge substrate layer 1 in this embodiment is 5 mm, the thickness of the film layer 2 is 0.13 mm, and the thickness of the abrasive glue mixture layer 3 is 0.3 mm.

Experiments have proved that the continuous grinding time of the high-precision sponge sand of this embodiment reaches 240 minutes, which is 8 times the service life of ordinary sponge sand.

The rest of this embodiment is the same as Embodiment 1, and will not be repeated here.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting the protection scope of the present invention, although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand , the technical solution of the present invention may be modified or equivalently replaced without departing from the spirit and scope of the technical solution of the present invention.

Claims (8)

1. a manufacture method for high accuracy sponge sand, is characterized in that: comprise following addingWork step is rapid:

Step 1, choose sponge substrate layer;

Step 2, modulation abrasive material glue mixture, the raw material that takes formula ratio is poured in clean containerStir;

Step 3, choose thin layer, the abrasive material glue mixture blade coating that step 2 is made is at thin layerUpper, make to form on thin layer an abrasive material glue mixture layer;

Step 4, the thin layer that scribbles abrasive material glue mixture layer to scraping are dried, and make abrasive material glueGlue dries in mixture layer; After glue dries, the abrasive material in abrasive material glue mixture layerExpose glue layer surface; Wherein, bake out temperature is 70-120 DEG C, and drying time is40-80min；

Step 5, bonding to thin layer after treatment step 4 and described sponge substrate layer, make high-precisionDegree sponge sand finished product;

Wherein, described abrasive material glue mixture comprises following raw material:

Host, host is made up of abrasive material 1-6 part, glue 1-2 part and diluent 2-6 part;

Anti-settling agent is the 2%-5% of the gross weight of host,

Dispersant is the 1%-4% of the gross weight of host,

Levelling agent is the 2%-6% of the gross weight of host;

Wherein, described thin layer is elastic hot melten gel thin layer, elastic plastic film layer or TPU filmLayer.

2. the manufacture method of a kind of high accuracy sponge sand according to claim 1, itsBe characterised in that: described abrasive material glue mixture comprises following raw material:

Host, host is made up of abrasive material 2-5 part, 1 part, glue and diluent 3-5 part;

Anti-settling agent is the 2%-4% of the gross weight of host,

Dispersant is the 1%-3% of the gross weight of host,

Levelling agent is the 2%-4% of the gross weight of host.

3. the manufacture method of a kind of high accuracy sponge sand according to claim 2, itsBe characterised in that: described abrasive material is that white fused alumina abrasive material, brown corundum abrasive, silicon carbide abrasive, zirconium are firmOne or more mixtures that mix by a certain percentage in beautiful abrasive material or glass abrasive material.

4. the manufacture method of a kind of high accuracy sponge sand according to claim 3, itsBe characterised in that: the particle diameter of described abrasive material is 240-2500 order.

5. the manufacture method of a kind of high accuracy sponge sand according to claim 2, itsBe characterised in that: described glue be Dongguan China originate fat Co., Ltd manufacture model be 909AB-RGlue.

6. the manufacture method of a kind of high accuracy sponge sand according to claim 1, itsBe characterised in that: described sponge substrate layer is that the model that Baoan district of Shenzhen city Dong great sponge factory manufactures isThe sponge substrate layer of DD-100.

7. the manufacture of a kind of high accuracy sponge sand as described in claim 1-6 any oneThe high accuracy sponge sand that method is manufactured.

8. a kind of high accuracy sponge sand according to claim 7, is characterized in that:The thickness of described sponge substrate layer is 3-7 millimeter, and the thickness of described thin layer is 0.08-0.15Millimeter, the thickness of described abrasive material glue mixture layer is 0.05-0.3 millimeter.