Efficient production process for environment-friendly resin handicrafts

Abstract

The invention discloses an efficient production process for environment-friendly resin crafts. The efficient production process for the environment-friendly resin crafts comprises the following steps: S1, filler treatment; s2, preparing a resin system; s3, mold treatment is conducted, specifically, a mold is sprayed with a semi-permanent mold release agent, a mold release agent film layer with the preset thickness is obtained, and the temperature of the mold is preset to 40 DEG C; s4, automatic pouring is conducted, specifically, the pouring curing temperature, pressure and curing time are set as follows: in the gel stage, curing is conducted for 30-60 min at the temperature of 35-40 DEG C and the pressure of 0.3 MPa, so that exhausting is completed, and bubbles of a resin system are reduced; in the main curing stage, curing is performed at 65-70 DEG C and normal pressure for 1-2 hours, so that the crosslinking reaction is accelerated; in the post-curing stage, curing is conducted for 30 min at the temperature of 50 DEG C and the normal pressure, so that internal stress S5, automatic demolding; and S6, finish machining is conducted on the crude product of the environment-friendly resin artware. According to the efficient production process of the environment-friendly resin artware, the curing efficiency of a resin system is enhanced by adjusting temperature control in the pouring process.

Description

Technical Field

[0001] The present invention relates to the technical field of resin handicraft production technology, in particular to an environmentally friendly resin handicraft high-efficiency production technology. Background Art

[0002] Resin crafts are artificial ornaments or practical objects made primarily from synthetic resins through casting, curing, and shaping processes. Their core characteristics lie in leveraging the resin's plasticity, transparency, and coloring properties to mimic natural materials (such as crystal, jade, and wood) or create unique artistic effects. The main materials are typically epoxy, polyurethane, or unsaturated polyester resins. Through a process involving liquid resin mixed with a curing agent, polymerization, and solid-state molding, the finished resin crafts exhibit properties such as high transparency (imitation crystal), easy coloring, high detail reproduction, and the ability to embed objects (such as dried flowers and insects). To enhance the environmental friendliness of resin crafts, bio-based resins can be used as the main material, reducing the consumption of petrochemicals and greenhouse gas emissions. This also makes the products and waste easily recyclable, promoting resource recycling.

[0003] The Chinese patent application number 202111260976.9 discloses a production process for environmentally friendly resin handicrafts, comprising the following steps: A. placing the mold at the entrance of the assembly line; B. the mold enters the environmentally friendly closed room through a conveyor belt for grouting and capping; C. performing the first shaking through the first shaking robot arm. The present invention provides a production process for environmentally friendly resin handicrafts, which only requires manual placement and removal of molds at the entrance and exit positions, and fully automated efficient production, replacing traditional manual shaking, greatly improving production efficiency compared to traditional methods. A production line for environmentally friendly resin handicrafts, comprising a conveyor belt, a feeding and capping assembly, a first shaking robot arm, a second shaking robot arm, a third shaking robot arm, a first vacuum machine and a second vacuum machine. The present invention provides a production line for environmentally friendly resin handicrafts, which realizes simultaneous grouting, shaking, vacuuming and other actions, thereby increasing production efficiency.

[0004] However, the above-mentioned environmentally friendly resin handicraft production process is only improved by adjusting the production line equipment layout and equipment output parameters, without fully utilizing the improvement direction of the resin system ratio and process flow conditions. As a result, there is still a lot of room for improvement in the production efficiency of environmentally friendly resin handicrafts. Summary of the Invention

[0005] Based on this, it is necessary to provide an efficient production process for environmentally friendly resin handicrafts to address the technical problem that the production efficiency of existing environmentally friendly resin handicrafts is still insufficient.

[0006] An efficient production process for environmentally friendly resin handicrafts, comprising the following steps: S1, filler treatment, taking a preset amount of filler and drying it at 80° C. for 2 hours, then grinding it to a preset particle size to obtain filler particles, and modifying the filler particles with a silane coupling agent to obtain a modified filler; S2. Resin system preparation: taking a preset amount of bio-based epoxy resin, curing agent, modified filler, and water-based color paste based on the resin system formula, and thoroughly mixing them in a vacuum mixer to obtain a mixture A; S3, mold treatment, using a semi-permanent release agent to spray the mold with a release agent to obtain a release agent film layer of a preset thickness, and preset the mold to 40°C; S4, automated pouring, using a six-axis robotic arm and a quantitative pouring head to pour the mixture A at a pouring speed of 50-100g / s. The pouring curing temperature, pressure, and curing time are specifically set as follows: the gel stage is cured at 35-40°C and 0.3MPa for 30-60min to complete degassing and reduce bubbles in the resin system; the main curing stage is cured at 65-70°C and normal pressure for 1-2h to accelerate the cross-linking reaction; the post-curing stage is cured at 50°C and normal pressure for 30min to eliminate internal stress; S5, automatic demoulding, using pneumatic ejection mechanism and robotic arm clamping to carry out the demoulding process, the demoulding temperature is controlled at 45-50℃ to avoid deformation, and the rough product of environmentally friendly resin handicraft is obtained; S6. Fine-processing the rough environmentally friendly resin handicraft, removing the gate, and polishing to obtain the environmentally friendly resin handicraft.

[0007] In one embodiment, the above-mentioned efficient production process for environmentally friendly resin handicrafts further includes step S7, waste recycling, wherein the gate and waste obtained in step S6 are crushed and mixed into the modified filler for later use.

[0008] In one embodiment, in the above-mentioned step S1 , the target particle size of the filler during the grinding process is less than 100 μm.

[0009] In one embodiment, in the above step S1, the amount of the filler particle-modified silane coupling agent is set to 1-3 parts.

[0010] In one embodiment, in the above step S1, the moisture content of the modified filler is controlled to be less than 0.5%, and the contact angle after modification is controlled to be greater than 90°.

[0011] In one embodiment, in the above step S2, the mixing vacuum is set to -0.095 MPa, the mixing time is set to 3 minutes, and the temperature is set to 25±2°C.

[0012] In one embodiment, in the above step S3, the release agent spraying thickness is set to 5-10 μm, and after spraying, the release agent is dried at 80° C. for 10 minutes.

[0013] In one embodiment, in the above step S3, the mold is an aluminum alloy mold, and the mold preheating temperature is set to 40°C.

[0014] In one embodiment, in the above-mentioned step S6, the de-gating process uses a CNC water jet cutting method to cut and remove the gate on the surface of the rough environmentally friendly resin handicraft, and the cutting pressure is set to 400MPa; the polishing process uses an automated cloth wheel polishing method, and the Brun speed is set to 1200rpm.

[0015] In one embodiment, the resin system formula comprises the following components in parts by mass: 100 parts of a bio-based epoxy resin, 35 parts of a modified alicyclic amine, 5-8 parts of a bio-based propylene oxide benzyl ether, 15-25 parts of a modified natural filler, and 0.5-2 parts of a water-based UV-stabilized colorant.

[0016] In one embodiment, the addition fraction of the bio-based propylene oxide benzyl ether may be set to 5, 6, 7 or 8.

[0017] In one embodiment, the addition fraction of the modified natural filler can be set to 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 or 25.

[0018] In one embodiment, the addition fraction of the aqueous UV-stable colorant can be set to 0.5, 0.7, 0.9, 1.1, 1.3, 1.5, 1.7, 1.9 or 2.

[0019] In one embodiment, the resin system formula further comprises the following components in parts by mass: 0.1-0.3 parts of a defoamer, 0.2-0.5 parts of a leveling agent, 0.3-0.8 parts of a UV absorber, and 3-5 parts of a toughening agent.

[0020] In one embodiment, the addition fraction of the defoaming agent can be set to 0.1, 0.2 or 0.3.

[0021] In one embodiment, the addition fraction of the leveling agent can be set to 0.2, 0.3, 0.4 or 0.5.

[0022] In one embodiment, the addition fraction of the ultraviolet absorber can be set to 0.3, 0.4, 0.5, 0.6, 0.7 or 0.8.

[0023] In one embodiment, the addition fraction of the toughening agent may be set to 3, 3.2, 3.4, 3.6, 3.8, 4, 4.5 or 5.

[0024] The process products made based on the efficient production process of environmentally friendly resin handicrafts of the present invention can meet the various performance requirements of the current market for resin handicraft products. Under this premise, the efficient production process of environmentally friendly resin handicrafts of the present invention (1) The curing efficiency of the resin system is enhanced by adjusting the temperature control of the pouring process. Specifically, the present invention sets the pouring curing temperature, pressure and curing time as follows: the gel stage is cured at 35-40°C and 0.3MPa for 30-60min; the main curing stage is cured at 65-70°C and normal pressure for 1-2h; the post-curing stage is cured at 50°C and normal pressure for 30min, thereby constituting a gradient temperature-controlled curing of the resin system, providing targeted curing conditions for each stage in the resin curing process, so that each curing stage can complete the stage curing with the highest efficiency, thereby greatly reducing the curing time of the environmentally friendly resin craft casting process and significantly improving the curing efficiency; (2) The closed-loop system based on bio-based epoxy resin as raw material combined with filler recovery can further improve the raw material utilization rate, reduce waste emissions, and further enhance the environmental friendliness of the efficient production process of environmentally friendly resin handicrafts of the present invention. DETAILED DESCRIPTION

[0025] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, the following detailed description of the specific embodiments of the present invention is provided below. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] The present invention discloses an efficient production process for environmentally friendly resin handicrafts, which comprises the following steps: S1, filler treatment, taking a preset amount of filler and drying it at 80° C. for 2 hours, then grinding it to a preset particle size to obtain filler particles, and modifying the filler particles with a silane coupling agent to obtain a modified filler; S2. Resin system preparation: taking a preset amount of bio-based epoxy resin, curing agent, modified filler, and water-based color paste based on the resin system formula, and thoroughly mixing them in a vacuum mixer to obtain a mixture A; S3, mold treatment, using a semi-permanent release agent to spray the mold with a release agent to obtain a release agent film layer of a preset thickness, and preset the mold to 40°C; S4, automated pouring, using a six-axis robotic arm and a quantitative pouring head to pour the mixture A at a pouring speed of 50-100g / s. The pouring curing temperature, pressure, and curing time are specifically set as follows: the gel stage is cured at 35-40°C and 0.3MPa for 30-60min to complete degassing and reduce bubbles in the resin system; the main curing stage is cured at 65-70°C and normal pressure for 1-2h to accelerate the cross-linking reaction; the post-curing stage is cured at 50°C and normal pressure for 30min to eliminate internal stress; S5, automatic demoulding, using pneumatic ejection mechanism and robotic arm clamping to carry out the demoulding process, the demoulding temperature is controlled at 45-50℃ to avoid deformation, and the rough product of environmentally friendly resin handicraft is obtained; S6. Fine-processing the rough environmentally friendly resin handicraft, removing the gate, and polishing to obtain the environmentally friendly resin handicraft.

[0027] Furthermore, the efficient production process of environmentally friendly resin handicrafts also includes step S7, waste recycling, and the gate and waste obtained in step S6 are crushed and mixed into the modified filler for standby use.

[0028] Furthermore, in the above step S1 , the target particle size of the filler grinding process is less than 100 μm.

[0029] Furthermore, in the above step S1, the amount of the filler particle-modified silane coupling agent is set to 1-3 parts.

[0030] Furthermore, in the above step S1, the moisture content of the modified filler is controlled to be less than 0.5%, and the contact angle after modification is controlled to be greater than 90°.

[0031] Furthermore, in the above step S2, the mixing vacuum degree is set to -0.095 MPa, the mixing time is set to 3 min, and the temperature is set to 25±2°C.

[0032] Furthermore, in the above step S3, the release agent spraying thickness is set to 5-10 μm, and after spraying, it is dried at 80° C. for 10 minutes.

[0033] Furthermore, in the above step S3, the mold is an aluminum alloy mold, and the mold preheating temperature is set to 40°C.

[0034] Furthermore, in the above-mentioned step S6, the de-gating process uses a CNC water jet cutting method to cut and remove the gate on the surface of the rough environmentally friendly resin handicraft, and the cutting pressure is set to 400MPa; the polishing process uses an automated cloth wheel polishing method, and the Brun speed is set to 1200rpm.

[0035] Furthermore, the resin system formula includes the following components in parts by mass: 100 parts of bio-based epoxy resin, 35 parts of modified alicyclic amine, 5-8 parts of bio-based propylene oxide benzyl ether, 15-25 parts of modified natural filler and 0.5-2 parts of water-based UV-stabilized color paste. Among them, bio-based epoxy resin should provide high transparency (such as >92%) and low viscosity (such as 850cps) to ensure the colorability and processing performance of epoxy resin handicrafts; modified epoxy resin provides low yellowing properties for the resin system; bio-based propylene oxide benzyl ether provides viscosity reduction and fluidity improvement functions for the resin system to optimize the injection molding process; modified natural fillers provide reinforcement properties for the resin system, reduce the risk of shrinkage of finished products, and reduce production costs. Specifically, one of the surface-treated wood powder, bamboo powder or coffee grounds can be used. More specifically, the particle size of the modified natural filler is controlled below 50μm to ensure the fluidity of the resin system; water-based UV-stable color paste should provide excellent weather resistance, such as ΔE < 2 (1000h UV), to ensure the color stability of the handicrafts.

[0036] In some embodiments, specifically, the addition fraction of bio-based propylene oxide benzyl ether can be set to 5, 6, 7 or 8.

[0037] In some embodiments, specifically, the addition fraction of the modified natural filler can be set to 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 or 25.

[0038] In some embodiments, specifically, the addition fraction of the aqueous UV-stable colorant can be set to 0.5, 0.7, 0.9, 1.1, 1.3, 1.5, 1.7, 1.9 or 2.

[0039] Furthermore, in one embodiment, the resin system formulation further includes the following components, measured by weight: 0.1-0.3 parts of a defoamer, 0.2-0.5 parts of a leveling agent, 0.3-0.8 parts of a UV absorber, and 3-5 parts of a toughening agent. The defoamer, specifically BYK-A555, can eliminate microbubbles in the resin system and prevent pinholes from forming on the finished product surface. The leveling agent, specifically TEGO Glide 410, can improve the leveling of the resin system and eliminate the orange peel effect on the finished product surface. The UV absorber, specifically Tinuvin 1130, can further enhance the resin system's anti-yellowing ability and improve the finished product's outdoor durability. The toughening agent, specifically Hypro1300 X 33LC VTBNX US, can enhance the resin system's impact resistance.

[0040] In some embodiments, specifically, the addition fraction of the defoaming agent can be set to 0.1, 0.2 or 0.3.

[0041] In some embodiments, specifically, the addition fraction of the leveling agent can be set to 0.2, 0.3, 0.4 or 0.5.

[0042] In some embodiments, specifically, the addition fraction of the ultraviolet absorber can be set to 0.3, 0.4, 0.5, 0.6, 0.7 or 0.8.

[0043] In some embodiments, specifically, the addition fraction of the toughening agent can be set to 3, 3.2, 3.4, 3.6, 3.8, 4, 4.5, or 5.

[0044] The embodiments of the present invention will be described in detail below with reference to the examples. It should be understood that these examples are intended to illustrate the present invention only and are not intended to limit the scope of the invention. For experimental methods in the following examples where specific conditions are not specified, reference is made to the guidance provided in the present invention, and may also be made according to experimental manuals or conventional conditions in the art, or according to conditions recommended by the manufacturer, or with reference to experimental methods known in the art.

[0045] Test samples were prepared using the above production method using the following resin system: 100 parts bio-based epoxy resin, 35 parts modified alicyclic amine, 6 parts bio-based propylene oxide benzyl ether, 20 parts modified natural filler, 1 part water-based UV-stabilized colorant, 0.2 parts BYK-A555, 0.3 parts TEGO Glide 410, 0.5 parts Tinuvin 1130, and 4 parts Hypro 1300 X 33LC VTBNX US. The following performance tests were performed on the resulting samples. The performance test indicators, test methods, and test results are shown in Table 1.

[0046]

[0047] It can be seen that the process products produced by the efficient production process of environmentally friendly resin handicrafts of the present invention can meet the various performance requirements of the current market for resin craft products. Under this premise, the efficient production process of environmentally friendly resin handicrafts of the present invention enhances the curing efficiency of the resin system by adjusting the temperature control of the pouring process. Specifically, the present invention sets the pouring curing temperature, pressure and curing time as follows: the gel stage is cured at 35-40°C and 0.3MPa for 30-60min; the main curing stage is cured at 65-70°C and normal pressure for 1-2h; the post-curing stage is cured at 50°C and normal pressure for 30min, thereby constituting a gradient temperature-controlled curing of the resin system, providing targeted curing conditions for each stage in the resin curing process, so that each curing stage can complete the stage curing with the highest efficiency, thereby greatly reducing the curing time of the environmentally friendly resin handicraft pouring process and greatly improving the curing efficiency; in addition, the closed-loop system based on bio-based epoxy resin as raw material combined with filler recovery can further improve the raw material utilization rate, reduce waste emissions, and further enhance the environmental friendliness of the efficient production process of environmentally friendly resin handicrafts of the present invention.

[0048] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. An efficient production process for environmentally friendly resin handicrafts, characterized in that: The following steps are included: S1, filler treatment, taking a preset amount of filler and drying it at 80° C. for 2 hours, then grinding it to a preset particle size to obtain filler particles, and modifying the filler particles with a silane coupling agent to obtain a modified filler; S2. Resin system preparation: taking a preset amount of bio-based epoxy resin, curing agent, modified filler, and water-based color paste based on the resin system formula, and thoroughly mixing them in a vacuum mixer to obtain a mixture A; S3, mold treatment, using a semi-permanent release agent to spray the mold with a release agent to obtain a release agent film layer of a preset thickness, and preset the mold to 40°C; S4, automated pouring, using a six-axis robotic arm and a quantitative pouring head to pour the mixture A at a pouring speed of 50-100g / s. The pouring curing temperature, pressure, and curing time are specifically set as follows: the gel stage is cured at 35-40°C and 0.3MPa for 30-60min to complete degassing and reduce bubbles in the resin system; the main curing stage is cured at 65-70°C and normal pressure for 1-2h to accelerate the cross-linking reaction; the post-curing stage is cured at 50°C and normal pressure for 30min to eliminate internal stress; S5, automatic demoulding, using pneumatic ejection mechanism and robotic arm clamping to carry out the demoulding process, the demoulding temperature is controlled at 45-50℃ to avoid deformation, and the rough product of environmentally friendly resin handicraft is obtained; S6. Fine-processing the rough environmentally friendly resin handicraft, removing the gate, and polishing to obtain the environmentally friendly resin handicraft.

2. The efficient production process for environmentally friendly resin handicrafts according to claim 1, characterized in that: The efficient production process of environmentally friendly resin handicrafts further includes step S7, waste recycling, wherein the gate and waste obtained in step S6 are crushed and mixed into the modified filler for later use.

3. The efficient production process for environmentally friendly resin handicrafts according to claim 1, characterized in that: In step S1 , the target particle size of the filler during the grinding process is less than 100 μm.

4. The efficient production process for environmentally friendly resin handicrafts according to claim 1, characterized in that: In step S1, the amount of the filler particle-modified silane coupling agent is set to 1-3 parts.

5. The efficient production process for environmentally friendly resin handicrafts according to claim 1, characterized in that: In step S1, the moisture content of the modified filler is controlled to be less than 0.5%, and the contact angle after modification is controlled to be greater than 90°.

6. The efficient production process for environmentally friendly resin handicrafts according to claim 1, characterized in that: In step S2, the mixing vacuum degree is set to -0.095 MPa, the mixing time is set to 3 min, and the temperature is set to 25±2°C.

7. The efficient production process for environmentally friendly resin handicrafts according to claim 1, characterized in that: In step S3, the release agent spraying thickness is set to 5-10 μm, and after spraying, it is dried at 80° C. for 10 minutes.

8. The efficient production process for environmentally friendly resin handicrafts according to claim 1, characterized in that: In step S3, the mold is an aluminum alloy mold, and the mold preheating temperature is set to 40°C.

9. The efficient production process for environmentally friendly resin handicrafts according to claim 1, characterized in that: In step S6, the gate removal process uses a CNC water jet cutting method to cut and remove the gate on the surface of the rough environmentally friendly resin handicraft, and the cutting pressure is set to 400 MPa; the polishing process uses an automated cloth wheel polishing method, and the Brun speed is set to 1200 rpm.

10. The efficient production process for environmentally friendly resin handicrafts according to claim 1, characterized in that: The resin system formula includes the following components in parts by mass: 100 parts of bio-based epoxy resin, 35 parts of modified alicyclic amine, 5-8 parts of bio-based propylene oxide benzyl ether, 15-25 parts of modified natural filler and 0.5-2 parts of water-based UV-stabilized color paste.

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