Agilawood handicraft and preparation method thereof

Abstract

The invention provides an agilawood handicraft and a preparation method thereof. The preparation method comprises the following steps: (1) crushing and sieving the agilawood powder, stirring and mixing, pouring into a mold, pre-pressing, discharging bubbles, and then carrying out hot pressing; and (2) demolding after hot pressing, then drying in a drying box to obtain an original blank, and grinding and polishing the original blank to obtain the agilawood handicraft. Natural pure agilawood powder is adopted as a raw material, the artware is formed through mold pressing, the artware is not limited by the size, shape and the like of the material, the artware uniform in specification can be manufactured, product quality control is facilitated, and meanwhile the problems that the efficiency of manufacturing the agilawood artware through a carving process is low, and the manufacturing cost is low can be solved. According to the method, the defects that the quality is uneven due to the influence of the graver level are overcome, meanwhile, the prepared artware is good in compactness, smooth and free of cracking, meanwhile, the aroma components of agilawood can be effectively reserved, and high economic value is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of agarwood processing, and in particular to an agarwood handicraft and a preparation method thereof. Background Art

[0002] Agarwood is a precious natural spice with a unique aroma and medicinal value. The formation process of agarwood is complicated and usually takes decades or even hundreds of years, so its resources are scarce and expensive. The aroma of agarwood mainly comes from its internal oil components, which release a strong fragrance when burned or heated. Traditional agarwood products are mostly carved from logs or made into incense. When agarwood is carved into handicrafts such as bracelets, pendants, Buddha statues, figures and animal carvings, it is often limited by the size and shape of the material and the carving level of the carving master, which often makes the quality of the handicrafts uneven, unable to unify the specifications, and low efficiency. Therefore, it is necessary to find a method to improve the production of agarwood handicrafts.

[0003] Agarwood powder is a byproduct of agarwood processing, usually made from agarwood sawdust, scraps or low-quality agarwood. Although agarwood powder is rich in aroma components, it is difficult to use directly in making handicrafts or incense products due to its small particles and loose structure. At present, the agarwood powder commonly seen on the market is mostly used to make burning incense products such as incense sticks and incense coils, but its utilization rate is low, and it is easy to produce smoke and ash during the combustion process, affecting the user experience.

[0004] In recent years, with the advancement of process technology, powder pressing technology has gradually been applied to the field of handicraft production. Through high-pressure molding technology, powder materials can be pressed into handicrafts of various shapes, which not only improves the utilization rate of materials, but also enhances the strength and durability of products. However, the existing powder pressing technology is mostly used for materials such as metals and ceramics, and there is little research on the pressing of organic materials such as agarwood powder. During the pressing process of agarwood powder, how to maintain its aroma components and improve the density and strength of the product is a technical difficulty. Summary of the invention

[0005] In view of this, the present invention proposes an agarwood handicraft and a preparation method thereof. The present invention presses agarwood powder into shape through reasonable raw material matching and preparation process, which can not only effectively utilize agarwood resources and improve the production efficiency of agarwood handicrafts, but also simplify the production process and reduce production costs.

[0006] The technical solution of the present invention is achieved in this way:

[0007] A method for preparing an agarwood handicraft comprises the following steps:

[0008] (1) grinding and sieving agarwood powder, stirring and mixing to obtain agarwood fine powder, pouring the agarwood fine powder into a mold for pre-pressing and expelling bubbles, and then hot pressing;

[0009] (2) Demold after hot pressing, then place it in a drying oven for drying to obtain a green body, and grind and polish the green body to obtain the agarwood handicraft.

[0010] Furthermore, the particle size of the agarwood fine powder is 300 - 500 mesh.

[0011] Furthermore, the pre - pressing temperature is 40 - 50 °C, the pressure is 8 - 12 MPa, and the pre - pressing time is 50 - 60 min.

[0012] Furthermore, the heating rate during the pre - pressing process is 2 - 3 °C / min.

[0013] Furthermore, the pressure - increasing rate during the pre - pressing process is 1 - 2 MPa / min.

[0014] Furthermore, the hot - pressing temperature is 70 - 80 °C, the pressure is 30 - 40 MPa, and the hot - pressing time is 30 - 60 min.

[0015] Furthermore, the heating rate during the hot - pressing process is 4 - 6 °C / min.

[0016] Furthermore, the pressure - increasing rate during the pre - pressing process is 3 - 5 MPa / min.

[0017] Furthermore, the drying temperature of the drying oven is 20 - 30 °C, and the drying time is 40 - 48 h.

[0018] The agarwood handicraft prepared by the preparation method of the present invention.

[0019] Furthermore, the water content of the agarwood powder is 12 - 16%.

[0020] Furthermore, the resin content in the agarwood powder is ≥25%.

[0021] Furthermore, the agarwood handicrafts include various handicrafts such as bracelets, pendants, Buddha statues, human and animal carvings, etc.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] The present invention uses natural and pure agarwood powder as raw materials and adopts mold pressing to form handicrafts such as bracelets, pendants, Buddha statues, human and animal carvings, etc. It is not limited by the size and shape of the materials, and can produce handicrafts with uniform specifications, which is conducive to the control of product quality. At the same time, it can also solve the disadvantages of low efficiency in making agarwood handicrafts by carving process and uneven quality affected by the level of carving masters.

[0024] In the process of preparing agarwood handicrafts, no additional binder is added. By setting appropriate process conditions, the adhesion between agarwood powders is enhanced by their own resins, reducing the gaps between agarwood powder particles. During the pressing process, the agarwood handicrafts can have good density and compactness, and the agarwood handicrafts are smooth without cracking phenomena. At the same time, the aroma components of agarwood can be effectively retained.

[0025] The manufacturing process of the present invention is simple, and it can effectively utilize agarwood resources, greatly reducing the manufacturing cost. At the same time, the handicrafts prepared by the present invention have good shaping and are not easily deformed after shaping. Detailed implementation manners

[0026] To better understand the technical content of the present invention, specific embodiments are provided below to further illustrate the present invention.

[0027] Unless otherwise specified, the experimental methods used in the embodiments of the present invention are all conventional methods.

[0028] Unless otherwise specified, the materials, reagents, etc. used in the embodiments of the present invention can all be obtained from commercial channels.

[0029] Embodiment 1

[0030] The preparation method of the agarwood bracelet handicraft in this embodiment includes the following steps:

[0031] (1) After the agarwood powder is crushed and sieved, it is stirred to obtain agarwood fine powder with a particle size of 300 mesh. The agarwood fine powder is poured into a mold, and the temperature is raised to 40°C at a heating rate of 2°C / min, and the pressure is increased to 12 MPa at a pressure increasing rate of 2 MPa / min for pre-pressing for 50 min to discharge air bubbles. Then, the temperature is raised to 76°C at a heating rate of 5°C / min, and the pressure is increased to 40 MPa at a pressure increasing rate of 3 MPa / min for hot pressing for 30 min;

[0032] (2) After hot pressing, the pressure is slowly released to normal pressure for demolding, and then it is placed in a drying oven at 28°C for drying for 40 h to obtain a green body. The green body is polished and buffed to obtain the agarwood bracelet handicraft. The diameter of the agarwood bracelet is 5.5 cm, and the bar thickness is 1 cm.

[0033] Embodiment 2

[0034] The preparation method of the agarwood magnolia pendant in this embodiment includes the following steps:

[0035] (1) After pulverizing and sieving the agarwood powder, stir it to obtain agarwood fine powder with a particle size of 400 mesh. Pour the agarwood fine powder into a mold, raise the temperature to 45°C at a heating rate of 3°C / min, increase the pressure to 11 MPa at a pressure increasing rate of 2 MPa / min, perform pre-pressing for 55 min to discharge air bubbles, then raise the temperature to 75°C at a heating rate of 4°C / min, and increase the pressure to 35 MPa at a pressure increasing rate of 3 MPa / min for hot pressing for 60 min;

[0036] (2) After hot pressing, slowly release the pressure to atmospheric pressure for demolding, then place it in a drying oven at 30°C for drying for 46 h to obtain a blank. Grind and polish the blank to obtain the agarwood magnolia pendant handicraft. The size of the agarwood magnolia pendant is 77 mm × 20 mm, and the thickness is 16.5 mm.

[0037] Example 3

[0038] The preparation method of the agarwood pixiu ornament handicraft in this example includes the following steps:

[0039] (1) After pulverizing and sieving the agarwood powder, stir it to obtain agarwood fine powder with a particle size of 400 mesh. Pour the agarwood fine powder into a mold, raise the temperature to 45°C at a heating rate of 3°C / min, increase the pressure to 11 MPa at a pressure increasing rate of 2 MPa / min, perform pre-pressing for 55 min to discharge air bubbles, then raise the temperature to 75°C at a heating rate of 4°C / min, and increase the pressure to 35 MPa at a pressure increasing rate of 3 MPa / min for hot pressing for 60 min;

[0040] (2) After hot pressing, slowly release the pressure to atmospheric pressure for demolding, then place it in a drying oven at 25°C for drying for 46 h to obtain a blank. Grind and polish the blank to obtain the agarwood pixiu ornament handicraft. The height of the agarwood pixiu ornament is 6 cm, the length is 13.6 cm, and the width is 7.6 cm.

[0041] Example 4

[0042] The preparation method of the agarwood gourd pendant handicraft in this example includes the following steps:

[0043] (1) After pulverizing and sieving the agarwood powder, stir it to obtain agarwood fine powder with a particle size of 500 mesh. Pour the agarwood fine powder into a mold, raise the temperature to 50°C at a heating rate of 2°C / min, increase the pressure to 10 MPa at a pressure increasing rate of 1 MPa / min, perform pre-pressing for 54 min to discharge air bubbles, then raise the temperature to 80°C at a heating rate of 5°C / min, and increase the pressure to 38 MPa at a pressure increasing rate of 4 MPa / min for hot pressing for 60 min;

[0044] (2) Slowly release the pressure to atmospheric pressure after hot pressing for demolding, and then place it in a drying oven at 25°C for 45 hours to obtain a green body. Grind and polish the green body to obtain an agarwood gourd pendant handicraft. The specifications of the agarwood gourd pendant are 85 mm in height, 40 mm in maximum diameter, and 30 mm in minimum diameter.

[0045] Comparative Example 1

[0046] The difference between this comparative example and Example 4 is that agarwood powder with a particle size of 10 mesh is used, and the rest is the same as in Example 4.

[0047] The preparation method of the agarwood gourd pendant handicraft in this comparative example includes the following steps:

[0048] (1) Crush and sieve the agarwood powder and then stir to obtain agarwood fine powder with a particle size of 10 mesh. Pour the agarwood fine powder into a mold, raise the temperature to 50°C at a heating rate of 2°C / min, add pressure to 10 MPa at a pressure increase rate of 1 MPa / min for pre-pressing for 54 minutes to discharge air bubbles, and then raise the temperature to 80°C at a heating rate of 5°C / min and add pressure to 38 MPa at a pressure increase rate of 4 MPa / min for hot pressing for 60 minutes;

[0049] (2) Slowly release the pressure to atmospheric pressure after hot pressing for demolding, and then place it in a drying oven at 25°C for 45 hours to obtain a green body. Grind and polish the green body to obtain an agarwood gourd pendant handicraft. The specifications of the agarwood gourd pendant are 85 mm in height, 40 mm in maximum diameter, and 30 mm in minimum diameter.

[0050] Comparative Example 2

[0051] The difference between this comparative example and Example 4 is that the temperature conditions of pre-pressing and hot pressing are changed, and the rest is the same as in Example 4.

[0052] The preparation method of the agarwood gourd pendant handicraft in this comparison includes the following steps:

[0053] (1) Crush and sieve the agarwood powder and then stir to obtain agarwood fine powder with a particle size of 300 mesh. Pour the agarwood fine powder into a mold, quickly raise the temperature to 100°C at a heating rate of 20°C / min, add pressure to 10 MPa at a pressure increase rate of 1 MPa / min for pre-pressing for 54 minutes to discharge air bubbles, and then raise the temperature to 120°C at a heating rate of 20°C / min and add pressure to 38 MPa at a pressure increase rate of 4 MPa / min for hot pressing for 60 minutes;

[0054] (2) Slowly release the pressure to atmospheric pressure after hot pressing for demolding, and then place it in a drying oven at 25°C for 45 hours to obtain a green body. Grind and polish the green body to obtain an agarwood gourd pendant handicraft. The specifications of this agarwood gourd pendant are 85 mm in height, 40 mm in maximum diameter, and 30 mm in minimum diameter.

[0055] Comparative Example 3

[0056] The difference between this comparative example and Example 4 is: changing the pressure application conditions of pre-pressing and hot pressing, and the rest is the same as Example 4.

[0057] The preparation method of the agarwood gourd pendant handicraft in this comparison includes the following steps:

[0058] (1) Crush and sieve the agarwood powder and stir to obtain agarwood fine powder with a particle size of 300 mesh. Pour the agarwood fine powder into a mold, raise the temperature to 50°C at a heating rate of 2°C / min, increase the pressure to 60 MPa at a pressure increase rate of 15 MPa / min for pre-pressing for 54 minutes to discharge air bubbles, and then raise the temperature to 80°C at a heating rate of 5°C / min and increase the pressure to 100 MPa at a pressure increase rate of 20 MPa / min for hot pressing for 60 minutes;

[0059] (2) Slowly release the pressure to atmospheric pressure after hot pressing for demolding, and then place it in a drying oven at 25°C for 45 hours to obtain a green body. Grind and polish the green body to obtain an agarwood gourd pendant handicraft. The specifications of this agarwood gourd pendant are 85 mm in height, 40 mm in maximum diameter, and 30 mm in minimum diameter.

[0060] Prepare agarwood handicrafts in the manner of the above Examples 1-4 and Comparative Examples 1-3, and conduct performance tests on these handicrafts. The experimental samples for each example and comparative example are 10.

[0061] Density: Test according to "Methods for Determination of Wood Density (GB / T 1933-2009)".

[0062] Cracking performance test: Place the agarwood handicraft in a cycle between -20°C and 60°C for 10 times, 2 hours for each cycle, and observe the cracking situation.

[0063] Aroma change situation: Place the agarwood handicraft at a temperature of 60°C and a humidity of 65% RH for 3 months, take it out after 3 months for olfactory sensory test, and record the aroma change situation.

[0064] The test results are shown in Table 1 below.

[0065] Table 1 Performance test of agarwood handicrafts

[0066]

[0067] The above results show that in Examples 1-4 of the present invention, by setting appropriate process conditions, the adhesion between agarwood powders is enhanced by their own resins, the gaps between agarwood powder particles become smaller, the prepared agarwood handicrafts have good density, high strength, good compactness, are smooth and free of cracking, and can effectively retain the aroma components of agarwood. Compared with Example 4, in Comparative Example 1, the particle size mesh number of the fine agarwood powder was changed. The higher the mesh number of the agarwood powder, the finer the particles, the larger the surface area between the agarwood powders, and it is easier to adhere under the action of its own resin. Coarser particles are likely to cause looseness or cracking. Compared with Example 4, in Comparative Example 2, the temperature conditions of pre-pressing and hot-pressing were changed. Too low a temperature is not conducive to the effective adhesion of the resin in the agarwood itself, while too high a temperature is likely to cause the resin to be carbonized and release a burnt smell, and the bonding strength decreases significantly, resulting in a decrease in the density of the handicraft after pressing and cracking in the later stage. Also, the aroma substances of the agarwood handicraft are likely to be lost and the fragrance becomes lighter. Compared with Example 4, in Comparative Example 3, the pressing conditions of pre-pressing and hot-pressing were changed. Too high a pressure causes the resin to be extruded or the powder structure to break, thus reducing the bonding strength and resulting in slight cracking problems in the handicraft, and the fragrance also becomes lighter.

[0068] The present invention uses appropriate process conditions and gradient temperature increase to enable the resin in the agarwood powder to be fully softened, promote its flow and penetration between the agarwood powders, effectively improve its bonding performance, and uses gradient pressure increase, which also effectively improves the uniform stress between the agarwood powders, makes the gaps between the agarwood powder particles smaller, increases the bonding strength, thereby effectively improving the density and strength of the handicraft, effectively preventing cracking, and can effectively retain the aroma components of agarwood. Moreover, the manufacturing process of the present invention is simple, can effectively utilize agarwood resources, and greatly reduces the manufacturing cost.

[0069] 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 in the protection scope of the present invention.

Claims

1. A method for preparing agarwood handicrafts, characterized in that: The following steps are involved: (1) grinding and sieving agarwood powder, stirring and mixing to obtain agarwood fine powder, pouring the agarwood fine powder into a mold for pre-pressing and expelling bubbles, and then hot pressing; (2) After hot pressing, the mold is removed and then placed in a drying oven for drying to obtain the original blank, which is then ground and polished to obtain the agarwood handicraft.

2. The method for preparing agarwood handicraft according to claim 1, characterized in that: The particle size of the agarwood fine powder is 300 to 500 meshes.

3. The method for preparing agarwood handicraft according to claim 1, characterized in that: The pre-pressing temperature is 40-50° C., the pressure is 8-12 MPa, and the pre-pressing time is 50-60 min.

4. The method for preparing agarwood handicraft according to claim 3, characterized in that: The heating rate during the pre-pressing process is 2-3°C / min.

5. The method for preparing agarwood handicraft according to claim 3, characterized in that: The pressure increase rate during the pre-pressing process is 1-2 MPa / min.

6. The method for preparing agarwood handicraft according to claim 1, characterized in that: The hot pressing temperature is 70-80° C., the pressure is 30-40 MPa, and the hot pressing time is 30-60 min.

7. The method for preparing agarwood handicraft according to claim 6, characterized in that: The heating rate during the hot pressing process is 4-6°C / min.

8. The method for preparing agarwood handicraft according to claim 6, characterized in that: The pressure increase rate during the pre-pressing process is 3-5 MPa / min.

9. The method for preparing agarwood handicraft according to claim 1, characterized in that: The drying oven has a drying temperature of 20 to 30° C. and a drying time of 40 to 48 hours.

10. An agarwood handicraft made by the preparation method according to any one of claims 1 to 9.

Images