Gemstone and Purple Sand Surface Seaming Process and Equipment

Abstract

The present invention relates to the technical field of ceramics, and proposes a surface jointing process and equipment for gemstones and purple sand. The surface jointing equipment for gemstones and purple sand includes an angle grinder and a brazed diamond grinding wheel; in the surface jointing process for gemstones and purple sand, after the joint surfaces of the gemstones and purple sand are polished by the equipment, the gemstones are bonded to the purple sand using an adhesive. The present invention also proposes an adhesive, which comprises the following components in parts by weight: 30-50 parts of epoxy resin, 10-15 parts of N-methylolacrylamide, 5-10 parts of phenolic resin, 10-15 parts of quartz powder, 10-20 parts of ethanol, 4-7 parts of curing agent, and 0.1-0.5 part of silane coupling agent. Through the above technical solution, the problems in the prior art that there are a large number of gaps around the inlay and poor bonding effect in the surface inlay of purple sand products are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of ceramics, and specifically, to a process and equipment for joining the surfaces of gemstones and purple sand. Background Art

[0002] Purple sand is a ceramic product between pottery and porcelain, characterized by a dense structure, close to porcelainization, greater strength, and fine particles. Due to the good plasticity of purple sand raw materials, purple sand pottery has an artistic value different from other ceramic industries. Purple sand wares are not glazed, but fully utilize the natural color of the clay. After firing, they have a warm and moist color, ancient and lovely. The surface of purple sand wares also has a matte effect, which can not only weaken the reflection of light energy but also clearly show the vivid effects of the shape, decoration, and natural color of the utensils.

[0003] With the improvement of living standards, people's pursuit of beauty is becoming more and more diverse. The appearance requirements for jewelry and ornaments are also getting higher and higher. Inlaying gemstones on the surface of purple sand products can further improve the overall ornamental effect of purple sand products. However, there are generally problems such as a large number of gaps around the inlay and poor bonding effect in the existing purple sand products with gemstone inlays, which thus affect their beauty and service life. Summary of the Invention

[0004] The present invention provides a process and equipment for joining the surfaces of gemstones and purple sand, which solves the problems of a large number of gaps around the inlay and poor bonding effect in the existing purple sand products with gemstone inlays in the related art.

[0005] The technical solution of the present invention is as follows:

[0006] An adhesive, comprising the following components in parts by weight: 30 - 50 parts of epoxy resin, 10 - 15 parts of N-methylolacrylamide, 5 - 10 parts of phenolic resin, 10 - 15 parts of quartz powder, 10 - 20 parts of ethanol, 4 - 7 parts of curing agent, and 0.1 - 0.5 part of silane coupling agent.

[0007] As a further technical solution, the epoxy resin includes epoxy resin 828 and epoxy resin 128.

[0008] As a further technical solution, the mass ratio of epoxy resin 828 to epoxy resin 128 is 1:4.

[0009] As a further technical solution, the mass ratio of N-methylolacrylamide to phenolic resin is 1.5:1.

[0010] As a further technical solution, it comprises the following components in parts by weight: 40 parts of epoxy resin, 12 parts of N-methylolacrylamide, 8 parts of phenolic resin, 15 parts of quartz powder, 15 parts of ethanol, 5 parts of curing agent, and 0.3 part of silane coupling agent.

[0011] As a further technical solution, the curing agent includes one or more of curing agent T31, ethylenediamine, and 2-ethyl-4-methylimidazole;

[0012] The silane coupling agent includes one or more of γ-aminopropyltriethoxysilane, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, and (3-aminopropyl)trimethoxysilane.

[0013] The present invention also provides a method for preparing a binder. Ethanol, N-methylolacrylamide, quartz powder, and epoxy resin are mixed evenly, and then phenolic resin, a curing agent, and a silane coupling agent are added and stirred evenly to obtain the binder.

[0014] A gemstone and purple sand surface jointing device includes an angle grinder and a brazed diamond grinding wheel.

[0015] A gemstone and purple sand surface jointing process. After the joint surface of the gemstone and purple sand is polished by the above-mentioned device, the gemstone is bonded to the purple sand using the above-mentioned binder.

[0016] As a further technical solution, during the grinding process, first use an angle grinder to grind the joint surface of the gemstone and purple sand into a consistent arc and concave-convex shape, and then use a brazed diamond grinding wheel to grind out groove patterns.

[0017] The working principle and beneficial effects of the present invention are as follows:

[0018] 1. The present invention uses epoxy resin, N-methylolacrylamide, phenolic resin, quartz powder, ethanol, a curing agent, and a silane coupling agent as raw materials for the binder, providing a binder with excellent bonding performance. In addition, on the one hand, the silane coupling agent evenly disperses the quartz powder in the binder system, and on the other hand, it can form a three-dimensional network structure with N-methylolacrylamide and phenolic resin in the binder system, thereby improving the bonding performance of the binder.

[0019] 2. After the joint surface of the gemstone and purple sand is polished by an angle grinder and a brazed diamond grinding wheel, the binder provided by the present invention is used to inlay the gemstone on the purple sand surface without gaps and with good bonding effect. Specific Embodiments

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of the present invention.

[0021] Embodiment 1

[0022] S1. After uniformly mixing 15 parts of ethanol, 12 parts of N-methylolacrylamide, 15 parts of quartz powder and 40 parts of epoxy resin, add 8 parts of phenolic resin, 5 parts of curing agent T31 and 0.3 part of γ-aminopropyltriethoxysilane and stir evenly to obtain an adhesive. The epoxy resin consists of epoxy resin 828 and epoxy resin 128 with a mass ratio of 1:4;

[0023] S2. First, use an angle grinder to grind the bonding surface of the gemstone and the purple sand into the same arc and concave-convex shape. Then, use a brazing diamond grinding wheel to grind out the groove pattern, and then use the adhesive to bond the gemstone to the purple sand.

[0024] Example 2

[0025] S1. After uniformly mixing 10 parts of ethanol, 15 parts of N-methylolacrylamide, 12 parts of quartz powder and 50 parts of epoxy resin, add 10 parts of phenolic resin, 7 parts of ethylenediamine and 0.5 part of N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane and stir evenly to obtain an adhesive. The epoxy resin consists of epoxy resin 828 and epoxy resin 128 with a mass ratio of 1:4;

[0026] S2. First, use an angle grinder to grind the bonding surface of the gemstone and the purple sand into the same arc and concave-convex shape. Then, use a brazing diamond grinding wheel to grind out the groove pattern, and then use the adhesive to bond the gemstone to the purple sand.

[0027] Example 3

[0028] S1. After uniformly mixing 20 parts of ethanol, 12 parts of N-methylolacrylamide, 10 parts of quartz powder and 30 parts of epoxy resin, add 8 parts of phenolic resin, 4 parts of 2-ethyl-4-methylimidazole and 0.1 part of (3-aminopropyl)trimethoxysilane and stir evenly to obtain an adhesive. The epoxy resin consists of epoxy resin 828 and epoxy resin 128 with a mass ratio of 1:4;

[0029] S2. First, use an angle grinder to grind the bonding surface of the gemstone and the purple sand into the same arc and concave-convex shape. Then, use a brazing diamond grinding wheel to grind out the groove pattern, and then use the adhesive to bond the gemstone to the purple sand.

[0030] Example 4

[0031] S1. After uniformly mixing 15 parts of ethanol, 10 parts of N-methylolacrylamide, 15 parts of quartz powder and 40 parts of epoxy resin, add 5 parts of phenolic resin, 5 parts of curing agent T31 and 0.3 part of γ-aminopropyltriethoxysilane and stir evenly to obtain an adhesive. The epoxy resin consists of epoxy resin 828 and epoxy resin 128 with a mass ratio of 1:4;

[0032] S2. First, use a bench grinder to grind the bonding surface between the gemstone and the purple sand into a consistent arc and concave-convex shape. Then, use a brazing diamond grinding wheel to grind out the groove pattern, and finally use an adhesive to bond the gemstone to the purple sand.

[0033] Example 5

[0034] S1. Mix 15 parts of ethanol, 10 parts of N-methylolacrylamide, 15 parts of quartz powder and 40 parts of epoxy resin evenly. Then, add 8 parts of phenolic resin, 5 parts of curing agent T31 and 0.3 part of γ-aminopropyltriethoxysilane and stir evenly to obtain an adhesive. The epoxy resin is composed of epoxy resin 828 and epoxy resin 128 with a mass ratio of 1:4.

[0035] S2. First, use a bench grinder to grind the bonding surface between the gemstone and the purple sand into a consistent arc and concave-convex shape. Then, use a brazing diamond grinding wheel to grind out the groove pattern, and finally use an adhesive to bond the gemstone to the purple sand.

[0036] Example 6

[0037] S1. Mix 15 parts of ethanol, 15 parts of N-methylolacrylamide, 15 parts of quartz powder and 40 parts of epoxy resin evenly. Then, add 8 parts of phenolic resin, 5 parts of curing agent T31 and 0.3 part of γ-aminopropyltriethoxysilane and stir evenly to obtain an adhesive. The epoxy resin is composed of epoxy resin 828 and epoxy resin 128 with a mass ratio of 1:4.

[0038] S2. First, use a bench grinder to grind the bonding surface between the gemstone and the purple sand into a consistent arc and concave-convex shape. Then, use a brazing diamond grinding wheel to grind out the groove pattern, and finally use an adhesive to bond the gemstone to the purple sand.

[0039] Example 7

[0040] S1. Mix 15 parts of ethanol, 12 parts of N-methylolacrylamide, 15 parts of quartz powder and 40 parts of epoxy resin evenly. Then, add 8 parts of phenolic resin, 5 parts of curing agent T31 and 0.3 part of γ-methacryloyloxypropyltrimethoxysilane and stir evenly to obtain an adhesive. The epoxy resin is composed of epoxy resin 828 and epoxy resin 128 with a mass ratio of 1:4.

[0041] S2. First, use a bench grinder to grind the bonding surface between the gemstone and the purple sand into a consistent arc and concave-convex shape. Then, use a brazing diamond grinding wheel to grind out the groove pattern, and finally use an adhesive to bond the gemstone to the purple sand.

[0042] Comparative Example 1

[0043] The difference from Example 1 is only that N-methylolacrylamide is not added.

[0044] Comparative Example 2

[0045] It is only different from Example 1 in that phenolic resin is not added.

[0046] Comparative Example 3

[0047] It is only different from Example 1 in that phenolic resin and N-methylolacrylamide are not added.

[0048] Comparative Example 4

[0049] It is only different from Example 1 in that epoxy resin 828 is replaced with an equal amount of epoxy resin 618.

[0050] The adhesives provided in Examples 1 to 7 and Comparative Examples 1 to 4 were tested for shear strength with reference to the method of GB / T 7124-2008. The specific method is as follows:

[0051] Prepare two metal aluminum sheets with a specification of 100mm×25mm as test pieces to be bonded. Coat the adhesive on the shear surfaces of the two test pieces to be bonded, bond the shear surfaces of the two test pieces to be bonded, and after curing, test their shear strength. The test results are recorded in Table 1:

[0052] Table 1 Shear strength

[0053] Shearing strength / MPa Example 1 29.62 Example 2 28.95 Example 3 28.46 Example 4 26.98 Example 5 27.35 Example 6 27.87 Example 7 25.51 Comparative Example 1 22.53 Comparative Example 2 23.86 Comparative Example 3 20.17 Comparative Example 4 25.15

[0054] As can be seen from Table 1, the adhesives provided in Examples 1 to 6 of the present invention have good bonding performance to metal materials, and the shear strength is above 26.98 MPa.

[0055] The silane coupling agent used in Example 7 is γ-methacryloxypropyltrimethoxysilane, and the shear strength of the obtained adhesive is lower than that of Examples 1 to 6, and the bonding performance to metal materials is inferior to that of Examples 1 to 6.

[0056] The difference between Comparative Example 1 and Example 1 is only that N-methylolacrylamide is not added; the difference between Comparative Example 2 and Example 1 is only that phenolic resin is not added; the difference between Comparative Example 3 and Example 1 is only that phenolic resin and N-methylolacrylamide are not added; the shear strength of the adhesives provided in Comparative Examples 1 to 3 is lower than that of the examples. At the same time, after comparing the shear strength of Comparative Examples 1 to 3 with that of Example 1, it is found that there is a synergistic effect between phenolic resin and N-methylolacrylamide, which significantly improves the bonding performance of the adhesive.

[0057] In Comparative Example 4, the epoxy resin is composed of epoxy resin 618 and epoxy resin 128 with a mass ratio of 1:4. In Example 1, the epoxy resin is composed of epoxy resin 828 and epoxy resin 128 with a mass ratio of 1:4. The shear strength of the binder provided in Comparative Example 4 is lower than that in Example 1. Therefore, when the epoxy resin in the binder is composed of epoxy resin 828 and epoxy resin 128 with a mass ratio of 1:4, the bonding performance of the binder is the best.

[0058] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An adhesive, characterized in that, It comprises components in the following parts by weight: 30 - 50 parts of epoxy resin, 10 - 15 parts of N - hydroxymethyl acrylamide, 5 - 10 parts of phenolic resin, 10 - 15 parts of quartz powder, 10 - 20 parts of ethanol, 4 - 7 parts of curing agent, and 0.1 - 0.5 part of silane coupling agent; the epoxy resin is composed of epoxy resin 828 and epoxy resin 128 with a mass ratio of 1:

4.

2. The adhesive according to claim 1, characterized in that, The mass ratio of the N - hydroxymethyl acrylamide to the phenolic resin is 1.5:

1.

3. The adhesive according to claim 1, characterized in that, It comprises components in the following parts by weight: 40 parts of epoxy resin, 12 parts of N - hydroxymethyl acrylamide, 8 parts of phenolic resin, 15 parts of quartz powder, 15 parts of ethanol, 5 parts of curing agent, and 0.3 part of silane coupling agent.

4. The adhesive according to claim 1, characterized in that, The curing agent includes one or more of curing agent T31, ethylenediamine, and 2 - ethyl - 4 - methylimidazole; The silane coupling agent includes one or more of γ - aminopropyltriethoxysilane, N - (β - aminoethyl) - γ - aminopropyltrimethoxysilane, and (3 - aminopropyl)trimethoxysilane.

5. A method for preparing the adhesive according to claim 1, characterized in that, After uniformly mixing ethanol, N - hydroxymethyl acrylamide, quartz powder and epoxy resin, add phenolic resin, curing agent and silane coupling agent and stir evenly to obtain the binder.

6. A gemstone and purple sand surface jointing device, characterized in that, It includes an angle grinder and a brazed diamond grinding wheel.

7. A gemstone and purple sand surface jointing process, characterized in that, After grinding the bonding surface of the gemstone and purple sand with the equipment described in claim 6, use the binder described in any one of claims 1 - 4 to bond the gemstone to the purple sand.

8. The gemstone and purple sand surface jointing process according to claim 7, characterized in that, During the grinding, first use the angle grinder to grind the bonding surface of the gemstone and purple sand into a consistent arc and concave - convex shape, and then use the brazed diamond grinding wheel to grind out the groove pattern.