Process of silica gel complex mold product

Abstract

The invention discloses a silica gel complex mold product process which comprises the following steps: firstly, manufacturing a female mold, setting corresponding parameter standards in real time through CNC (computer numerical control) according to the dimension specification and shape standard of a 2D (two-dimensional) or 3D (three-dimensional) drawing, and processing the female mold; the preparation method comprises the following steps: preparing a female mold, performing laser rapid prototyping through SLA or manufacturing a prototype of the female mold through 3D printing equipment, then manufacturing a silica gel mold, firstly manufacturing a mold frame and a runner and exhausting when the silica gel mold is manufactured, mixing the material A and the material B according to a ratio of 1: 1 to prepare liquid silica gel, uniformly stirring, and vacuumizing and defoaming. Aiming at plastic or polyurethane products with small batches and complex shapes, the liquid silica gel can be fully attached to a female mold and perfectly copies the shapes by utilizing good fluidity of the liquid silica gel, the mold manufacturing time is far shorter than that of a steel mold, the mold manufacturing period can be greatly shortened, the mold has excellent elastic recovery capability, meanwhile, the mold is easier and more convenient to disassemble and assemble, and the production efficiency is improved. The operation difficulty of workers is greatly reduced, and working hours are effectively saved.

Description

Technical Field

[0001] The invention relates to the technical field of silicone molded product processing, in particular to a process for silicone molded products. Background Art

[0002] Polyurethane is the abbreviation of polyurethane, which is a polymer material. Polyurethane is an emerging organic polymer material, known as the "fifth plastic". It is widely used in many fields of the national economy due to its excellent performance. Plastic is a synthetic polymer compound {polymer}, also known as polymer or macromolecule, also commonly known as plastic or resin, which can change its shape freely. It is a material made by synthesizing or condensing monomer raw materials, composed of synthetic resin and additives such as fillers, plasticizers, stabilizers, lubricants, and colorants.

[0003] At present, the original solution for small-batch, complex-shaped plastic or polyurethane products is generally to make metal molds for casting. This method has high material costs, high processing fees, high processing difficulty, and high labor costs. In addition, it is idle after being used dozens or hundreds of times, which is a great waste of enterprise costs. Summary of the invention

[0004] The purpose of the present invention is to provide a process for silicone mold products to solve the problem raised in the above background technology that the original solution for small-batch, complex-shaped plastic or polyurethane products is generally to make metal molds for casting and molding. This method has high material costs, high processing costs, high processing difficulty, and high labor costs; and it is idle after being used for dozens or hundreds of times, which is a great waste of enterprise costs.

[0005] To achieve the above object, the present invention provides the following technical solution: a process for producing a silicone molded product, the process comprising the following steps:

[0006] S1. First, you need to make a master mold, and according to the size specifications and shape standards of the 2D or 3D drawings, set the corresponding parameter standards in real time through CNC to process the master mold, and then use SLA for laser rapid prototyping or 3D printing equipment to make a prototype of the master mold.

[0007] S2. Then you need to make a silicone mold. When making a silicone mold, you first need to make a mold frame, runners and exhaust, and mix A and B materials in a 1:1 ratio to configure liquid silicone. Then stir them evenly and vacuum them for degassing. Then pour the mixed raw materials into the silicone mold and keep them at a certain room temperature for a period of time to solidify. Then use a parting knife and separation pliers to separate the mold.

[0008] S3. Finally, the pouring operation is required. Heat the silicone to a certain temperature, and then inject the liquid polyurethane material into the silicone mold. After curing in a constant temperature box at a certain temperature for a period of time, the demoulding operation can be carried out. The demoulded finished product is polished by professional equipment, and the quality of the finished product is inspected to see if it is qualified. If it is qualified, it can be packaged, numbered and put into storage.

[0009] Preferably, the normal temperature environment of the casting silicone mold needs to be maintained at 25° C., and the time required for the silicone mold curing process is 3-4 hours.

[0010] Preferably, the temperature to which the silica gel needs to be heated during the pouring should be maintained above 80 degrees Celsius, the temperature of the thermostat during the pouring should be maintained at 80°C-100°C, and the curing time after pouring is 30-60 minutes.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention can be used for small-batch, complex-shaped plastic or polyurethane products, by utilizing the good fluidity of liquid silicone to fully fit the master mold and perfectly replicate the shape. The mold making time is much shorter than that of a steel mold, which can greatly reduce the mold making cycle. The excellent elastic recovery ability makes it easier to disassemble and assemble the mold, greatly reducing the difficulty of operation for workers and effectively saving working hours.

[0012] The cost of the silicone material of the present invention is lower than that of traditional mold materials, and no processing fees are required, which further reduces the mold cost. The silicone material is non-toxic and harmless, and can be recycled in the later stage, which meets environmental protection requirements. In actual applications, it has better molding effects on products with complex shapes, resulting in less product flash, significantly higher effects and higher quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the silicone composite mold of the present invention.

[0014] In the figure: 1. Product mother mold; 2. Feed flow channel; 3. Discharge flow channel; 4. Silicone upper mold; 5. Silicone lower mold. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] Embodiment 1:

[0017] A process for a silicone molded product of this embodiment includes the following steps:

[0018] S1. First, the master mold needs to be made, and according to the size specifications and shape standards of the 2D or 3D drawings, the corresponding parameter standards are set in real time by CNC to process the master mold, and then the prototype of the master mold is made by SLA laser rapid prototyping or 3D printing equipment, which can make the production of the master mold more automated, improve the overall accuracy and reliability of the production of the master mold, and improve the overall efficiency of the production of the master mold.

[0019] S2. Then you need to make a silicone mold. When making a silicone mold, you first need to make a mold frame, runners and exhaust, and mix A and B materials in a 1:1 ratio to configure liquid silicone. Then stir them evenly and evacuate to degas. Then pour the mixed raw materials into the silicone mold and keep them at a certain room temperature for a period of time to solidify. Then use a parting knife and a separating pliers to separate the mold. The cost of using silicone materials is lower than that of traditional mold materials, and there is no processing fee, which further reduces the mold cost. The silicone material is non-toxic and harmless, and can be recycled in the later stage, which meets environmental protection requirements. In actual applications, for products with complex shapes, the molding effect is better, making the product have less flash.

[0020] S3. Finally, the pouring operation is required. Heat the silicone to a certain temperature, and then inject the liquid polyurethane material into the silicone mold. After a period of curing in a constant temperature box at a certain temperature, the demoulding operation can be carried out. The demoulded finished product is polished by professional equipment, and the quality of the finished product is inspected to see if it is qualified. If it is qualified, it can be packaged and numbered for storage. For small batches of plastic or polyurethane products with complex shapes, the good fluidity of liquid silicone can be used to fully fit the mother mold and perfectly replicate the shape. The mold making time is much shorter than that of steel molds, which can greatly reduce the mold making cycle. Its excellent elastic recovery ability makes it easier to disassemble and assemble the mold, greatly reducing the difficulty of workers' operation and effectively saving working hours.

[0021] In this embodiment, the normal temperature environment of the casting silicone mold needs to be maintained at 25°C, and the silicone mold curing process takes 3-4 hours, which allows the silicone mold to be better cured and shaped, thereby avoiding defects in the finished product.

[0022] In this embodiment, the temperature to which the silica gel needs to be heated during pouring should be maintained above 80 degrees Celsius, the temperature of the thermostat should be maintained at 80°C-100°C during pouring, and the curing time after pouring is 30-60 minutes, which can keep the pouring at the most suitable temperature and make the curing time more sufficient, effectively improving the overall effect and quality of the pouring.

[0023] Embodiment 2:

[0024] The difference from the first embodiment is that:

[0025] A process for a silicone molded product of this embodiment includes the following steps:

[0026] S1. First, you need to make a master mold, and according to the size specifications and shape standards of the 2D or 3D drawings, set the corresponding parameter standards in real time through CNC to process the master mold, and then use SLA for laser rapid prototyping or 3D printing equipment to make a prototype of the master mold.

[0027] S2. Then you need to make a silicone mold. When making a silicone mold, you first need to make a mold frame, runners and exhaust, and mix A and B materials in a 1:1 ratio to configure liquid silicone. Then stir them evenly and vacuum them for degassing. Then pour the mixed raw materials into the silicone mold and keep them at a certain room temperature for a period of time to solidify. Then use a parting knife and separation pliers to separate the mold.

[0028] S3. Finally, the pouring operation is required. Heat the silicone to a certain temperature, and then inject the liquid polyurethane material into the silicone mold. After curing in a constant temperature box at a certain temperature for a period of time, the demoulding operation can be carried out. The demoulded finished product is polished by professional equipment, and the quality of the finished product is inspected to see if it is qualified. If it is qualified, it can be packaged, numbered and put into storage.

[0029] In this embodiment, the normal temperature environment of the casting silicone mold needs to be maintained at 15° C., and the curing process of the silicone mold requires 1-2 hours.

[0030] In this embodiment, the temperature to which the silicone needs to be heated during pouring should be maintained below 80 degrees Celsius, the temperature of the thermostat should be maintained at 50°C-70°C during pouring, and the curing time after pouring is 10-25 minutes. If the pouring temperature is too low and the curing time is too short, the finished product molding effect will be poor, which greatly reduces the yield rate of the finished product.

[0031] Embodiment three:

[0032] The difference between the first embodiment and the second embodiment is that:

[0033] A process for a silicone molded product of this embodiment includes the following steps:

[0034] S1. First, you need to make a master mold, and according to the size specifications and shape standards of the 2D or 3D drawings, set the corresponding parameter standards in real time through CNC to process the master mold, and then use SLA for laser rapid prototyping or 3D printing equipment to make a prototype of the master mold.

[0035] S2. Then you need to make a silicone mold. When making a silicone mold, you first need to make a mold frame, runners and exhaust, and mix A and B materials in a 1:1 ratio to configure liquid silicone. Then stir them evenly and vacuum them for degassing. Then pour the mixed raw materials into the silicone mold and keep them at a certain room temperature for a period of time to solidify. Then use a parting knife and separation pliers to separate the mold.

[0036] S3. Finally, the pouring operation is required. Heat the silicone to a certain temperature, and then inject the liquid polyurethane material into the silicone mold. After curing in a constant temperature box at a certain temperature for a period of time, the demoulding operation can be carried out. The demoulded finished product is polished by professional equipment, and the quality of the finished product is inspected to see if it is qualified. If it is qualified, it can be packaged, numbered and put into storage.

[0037] In this embodiment, the normal temperature environment of the casting silicone mold needs to be maintained at 55° C., and the curing process of the silicone mold requires 6-8 hours.

[0038] In this embodiment, the temperature to which the silica gel needs to be heated during pouring should be maintained above 80 degrees Celsius, the temperature of the constant temperature box should be maintained at 110°C-150°C during pouring, and the curing time after pouring is 70-90 minutes. If the pouring temperature is too high and the curing time is too long, the finished product will be rough and of poor quality.

[0039] In summary: the results of the present invention in Example 1 of the present invention show that compared with the process results in Example 2 and Example 3, the present invention can be used for small-batch, complex-shaped plastic or polyurethane products, and the good fluidity of liquid silicone can be used to fully fit the master mold and perfectly replicate the shape. The mold making time is much lower than that of a steel mold, which can greatly reduce the mold making cycle. Its excellent elastic recovery ability makes it easier and more convenient to disassemble and assemble the mold, greatly reducing the difficulty of operation for workers and effectively saving working hours. The cost of the silicone material of the invention is lower than that of traditional mold materials, and no processing fees are required, further reducing the mold cost. The silicone material is non-toxic and harmless, and can be recycled in the later stage, which meets environmental protection requirements. In actual applications, the molding effect of products with complex shapes is better, so that the product has less flash, the effect is significantly higher, and the quality is better. Therefore, the effect of the present invention is better than that of Example 2 and Example 3.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A process for producing a silicone molded product, characterized in that: The process includes the following steps: S1. First, the master mold needs to be made, and according to the size specifications and shape standards of the 2D or 3D drawings, the corresponding parameter standards are set in real time by CNC to process the master mold, and then the prototype of the master mold is made by SLA laser rapid prototyping or 3D printing equipment; S2. Then, a silicone mold needs to be made. When making a silicone mold, a mold frame, a runner and an exhaust need to be made first, and liquid silicone is prepared by mixing materials A and B in a ratio of 1:

1. After stirring evenly, vacuum degassing is performed, and the mixed raw materials are poured into the silicone mold. After being kept at a certain room temperature for a period of time to solidify, the mold is separated using a mold separation knife and separation pliers. S3. Finally, the pouring operation is required. Heat the silicone to a certain temperature, and then inject the liquid polyurethane material into the silicone mold. After curing in a constant temperature box at a certain temperature for a period of time, the demoulding operation can be carried out. The demoulded finished product is polished by professional equipment, and the quality of the finished product is inspected to see if it is qualified. If it is qualified, it can be packaged, numbered and put into storage.

2. The process for producing a silicone molded product according to claim 1, characterized in that: The normal temperature environment of the casting silicone mold needs to be maintained at 25° C., and the curing process of the silicone mold requires 3-4 hours.

3. The process for producing a silicone molded product according to claim 1, characterized in that: The temperature to which the silica gel needs to be heated during the pouring should be maintained above 80 degrees Celsius, the temperature of the thermostat during the pouring should be maintained at 80°C-100°C, and the curing time after pouring is 30-60 minutes.

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