Method for processing glue injection layer of front mold of plastic mold

Abstract

The invention relates to the technical field of UV transfer printing processes, and discloses a plastic mold front mold glue injection layer processing method which comprises the following steps: S1, manufacturing a transfer printing mold, taking out a base, and covering the base with a protective film; s2, glue injection operation is conducted on the hole positions of the holes in the base and the interior of the mold, and a glue injection layer is formed; s3, texture carving operation is conducted on the glue injection layer; and S4, performing injection molding on UV glue between the lower part of the membrane layer and the mold to form an injection molding material layer. Through the arranged texture layer, the plastic mold glue injection layer and the texture layer, after the injection molding material layer (high-temperature glue) is filled, a user directly applies pressure to the plastic mold glue injection layer to enable the texture layer to press the high-temperature glue, so that the high-temperature glue is injected into the plastic mold glue injection layer; thus, the high-temperature glue forms corresponding textures, damage caused by direct contact between the texture layer and the high-temperature glue is avoided, and then the UV transfer printing precision of the process on the product is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of UV transfer technology, in particular to a method for processing a front mold injection glue layer of a plastic mold. Background Art

[0002] UV printing is a printing process that uses ultraviolet light to dry and cure ink, which can make the product surface wear-resistant and have light texture characteristics, making the product more beautiful.

[0003] Although the existing UV transfer process can transfer textures to the product surface during operation, the existing processing technology requires the texture to be bonded with high-temperature UV transfer glue. At this time, the temperature will cause wear and damage to the fine textures engraved on the plastic mold, thereby reducing the accuracy and quality of product processing by the existing process, resulting in uneven product quality. Defective products need to be recycled and reprocessed, which also reduces the transfer efficiency of product textures by relevant operators. For this reason, we propose a plastic mold front mold injection glue layer processing method. Summary of the invention

[0004] The present invention provides a method for processing a front mold injection layer of a plastic mold, which has the advantages of reducing the influence of temperature on the carving texture, improving the quality of the product processed by this process, and being simple to operate, thereby solving the problems raised by the above-mentioned background technology.

[0005] The present invention provides the following technical solution: a method for processing a front mold injection glue layer of a plastic mold, comprising the following steps:

[0006] Step S1: making a transfer mold, taking out the base, and covering the base with a protective film;

[0007] Mold making: The mold needs to have the effect of UV transfer and the positioning columns and positioning holes for printing ink (making transfer mold);

[0008] Step S2: performing glue injection operation on the opening holes on the base and inside the mold to form a glue injection layer;

[0009] Step S3: Carving texture on the injection layer;

[0010] Step S4: injecting UV glue between the bottom of the diaphragm layer and the mold to form an injection glue layer;

[0011] Transfer printing: Print the UV glue onto the transfer mold by silk screen printing;

[0012] Pressing: placing the injection layer on the transfer mold, and then using a glue stick to press the injection layer onto the transfer mold. Step S5: Opening the mold after curing the glue with a light curing machine;

[0013] Light curing: Put the sheet and transfer mold into the light curing machine for light curing;

[0014] Step S6: taking out the product and discharging waste (residual glue around the product);

[0015] Demoulding: Take the transferred product out of the mould and place it in the designated location.

[0016] Preferably, step S1 specifically includes: the base includes a product prototype made of polyethylene propylene or other similar materials, protective ink is applied between the protective film and the base, and the position of the protective ink is applied according to the required pattern and texture of the product.

[0017] Preferably, step S2 specifically includes: when the base is drilled with holes, the distance between the bottom of the inner wall of all holes and the bottom of the base is 3 cm, and the injection layer is made of polytetrafluoroethylene.

[0018] Preferably, step S3 specifically includes: the photolithography depth of the texture layer shall not be less than 0.005 mm and shall not exceed 0.008 mm.

[0019] Preferably, step S4 specifically includes: placing the side of the injection layer engraved with the texture toward the side of the injection rubber layer, and the pressure of the injection layer when imprinting the texture is 10 MPa.

[0020] Preferably, waste and scraps remaining when the base is opened are removed.

[0021] Preferably, the surface of the protective ink is also coated with a protective layer, and the protective layer is prepared by wear-resistant paint.

[0022] The present invention has the following beneficial effects:

[0023] 1. The plastic mold front mold injection layer processing method, by setting the texture layer and the plastic mold injection layer and the texture layer, by reversing the placement order and adjusting the placement direction of the texture layer, after the injection glue layer (high-temperature glue) is filled, the user directly applies pressure to the plastic mold injection layer to allow the texture layer to press the high-temperature glue, so that the high-temperature glue forms a corresponding texture, thereby avoiding damage to the texture layer caused by direct contact with the high-temperature glue, ensuring the integrity of the texture during the processing, so that the texture can be accurately transferred to the product, thereby ensuring the accuracy of the process for UV transfer of the product.

[0024] 2. The plastic mold front injection molding glue layer processing method can complete the product's UV transfer operation by reversing the placement order of each material layer, and the processing operation of the product defects after the UV transfer operation does not differ from the existing technology, thereby reducing the operating difficulty of the process, and the processing methods and material sources of each layer are common materials and processing methods, thereby reducing the cost and technical difficulty of the process in the application process, making it easier for production personnel to operate, reducing the technical requirements and experience requirements of the process in the production process, and thus improving the practicability of the processing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the processing flow of the present invention;

[0026] Figure 2 This is a schematic diagram of the traditional process flow;

[0027] Figure 3 This is a schematic diagram of the IML injection molding structure of the present invention;

[0028] Figure 4 Schematic diagram of the traditional IML injection molding structure. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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.

[0030] See also Figure 1-Figure 4 A method for processing a front mold injection layer of a plastic mold comprises the following steps:

[0031] Step S1: making a transfer mold, taking out the base, and covering the base with a protective film;

[0032] Mold making: The mold needs to have the effect of UV transfer and the positioning columns and positioning holes for printing ink (making transfer mold);

[0033] Step S2: performing glue injection operation on the opening holes on the base and inside the mold to form a glue injection layer;

[0034] Step S3: Carving texture on the injection layer;

[0035] Step S4: injecting UV glue between the bottom of the diaphragm layer and the mold to form an injection glue layer;

[0036] Transfer printing: Print the UV glue onto the transfer mold by silk screen printing;

[0037] Pressing: placing the injection layer on the transfer mold, and then using a glue stick to press the injection layer onto the transfer mold. Step S5: Opening the mold after curing the glue with a light curing machine;

[0038] Light curing: Put the sheet and transfer mold into the light curing machine for light curing;

[0039] Step S6: taking out the product and discharging waste (residual glue around the product);

[0040] Demoulding: Take the transferred product out of the mould and place it in the designated location.

[0041] In the above process, a protective film is covered on the base, and then a glue injection layer is made through the base and the texture of the glue injection layer is photolithographically processed. This processing method only requires placing the glue injection layer on the membrane layer, and using the glue injection layer and the membrane layer to isolate the texture layer from the high-temperature glue layer, thereby avoiding damage to the integrity of the texture layer by the high-temperature glue, thereby ensuring the quality and uniformity of the process for the product's UV transfer operation. At the same time, the operator only needs to reverse the placement order of the membrane layer, the injection glue layer and the membrane layer to complete the UV transfer operation, which has the characteristics of simple operation.

[0042] In a preferred embodiment, step S1 specifically includes: the base includes a product prototype made of polyethylene propylene or other similar materials, protective ink is applied between the protective film and the base, and the position of the protective ink is applied according to the required pattern and texture of the product.

[0043] In the above process, the added protective ink can ensure that during the UV transfer process, the protective ink will form a convex shape, and a gap will be generated between the high-temperature glue and the texture layer during the transfer process, thereby ensuring that the high-temperature glue forms a corresponding concave shape after curing, further ensuring the accuracy of this process during the transfer process.

[0044] In a preferred embodiment, step S2 specifically includes: when the base is drilled with holes, the distance between the bottom of the inner wall of all holes and the bottom of the base is 3 cm, and the injection layer is made of polytetrafluoroethylene.

[0045] In the above content, the pressure size needs to be considered when opening the hole, and the strength of the injection molding layer will be affected after the hole is opened. By limiting the distance between the inner wall of the hole and the bottom of the base, the base in the production process will not crack or even break even under pressure, thereby ensuring that the base can be fully attached to the texture layer, thereby ensuring that the texture layer can complete the transfer operation of the texture after being compressed, thereby ensuring the normal progress of the process.

[0046] In a preferred embodiment, step S3 specifically includes: the photolithography depth of the texture layer shall not be less than 0.005 mm and shall not exceed 0.008 mm.

[0047] In the above content, carving the texture layer can ensure that the high-temperature glue can form a corresponding shape, and during the carving process, limiting the depth or height of the texture layer can ensure that no excessively deep grooves or excessively high raised textures are formed on the product surface, thereby ensuring that the aesthetics of the final product will not be affected.

[0048] In a preferred embodiment, step S4 specifically includes: placing the side of the injection layer engraved with the texture toward the side of the injection rubber layer, and the pressure of the injection layer when imprinting the texture is 10 MPa.

[0049] In the above process, the texture layer and the injection molding adhesive layer (high-temperature glue) are placed in correspondence so that the texture layer is under the barrier of the diaphragm layer. The pressure device makes the texture layer fit tightly to the high-temperature glue, so that the high-temperature glue is compressed to form a shape corresponding to the texture layer. In this way, when the adhesive is molten, the diaphragm layer is used instead of the texture layer to directly contact the injection molding adhesive layer in a high-temperature state, thereby avoiding damage and destruction to the integrity of the texture layer by the high-temperature injection molding adhesive layer, ensuring that the photolithography texture layer is clearer, and at the same time, sufficient pressure is used to ensure the fit between each layer of material, thereby avoiding the occurrence of unclear texture transfer during the production process, and through the texture layer of uniform depth to ensure that the texture layer of the product can be clearly seen in both microscopic and macroscopic conditions, thereby improving the production accuracy and quality of the product by this process.

[0050] In a preferred embodiment, waste and scraps remaining when the base is opened are removed.

[0051] In the above content, the residues and scraps in the holes are removed to ensure that during the use of the processing method, when the injection layer and the texture layer are bonded, the corresponding gas rods and ejector pins inside the mold will be plugged into the holes, and the scraps and residues will not interfere with the bonding between the two, thereby ensuring that the texture will not be broken or unclear after transfer, and the accuracy of the texture after transfer can be guaranteed, thereby reducing the probability of defective products in the production process of product prototypes, and thus ensuring the production quality of the product by this process.

[0052] In a preferred embodiment, the surface of the protective ink is also coated with a protective layer, and the protective layer is prepared by wear-resistant paint.

[0053] In the above content, by setting a protective layer on the surface of the protective ink, pressure will be generated between the injection layer and the protective ink during the production process of the process, and the protective layer can effectively provide protection for the protective ink, thereby avoiding the deformation or even damage of the protective ink due to excessive pressure, thereby ensuring that the protective ink always maintains its original shape during the processing process, avoiding the protective ink from being squeezed out and deformed after being pressed, so that it can maintain its original shape and be printed on the product surface, further improving the quality of product patterns and printings during the production process of this process.

[0054] In a preferred embodiment, steps S5-S6 specifically include: the mold opening process needs to be in a dust-free environment, and the residual glue can be treated by heat treatment and physical treatment.

[0055] In the above content, the product processing operations to produce the final product can be completed in a manner similar to the existing technology without any difference. It is easier for operators to operate, thereby ensuring that there are no technical barriers for existing production personnel, thereby improving the practicability of the processing technology.

[0056] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0057] 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 method for processing a plastic mold front mold injection layer, characterized in that: The following steps are involved: Step S1: making a transfer mold, taking out the base, and covering the base with a protective film; Mold making: The mold needs to have the effect of UV transfer and the positioning columns and positioning holes for printing ink (making transfer mold); Step S2: injecting glue into the opening holes on the base and inside the mold to form a glue injection layer; Step S3: Carving texture on the injection layer; Step S4: injecting UV glue between the bottom of the diaphragm layer and the mold to form an injection glue layer; Transfer printing: Print the UV glue onto the transfer mold by silk screen printing; Pressing: Place the injection layer on the transfer mold, and then use a glue stick to press the injection layer onto the transfer mold Step S5: Open the mold after curing the glue with a light curing machine; Light curing: Put the sheet and transfer mold into the light curing machine for light curing; Step S6: taking out the product and discharging waste (residual glue around the product); Demoulding: Take the transferred product out of the mould and place it in the designated location.

2. A method for processing a front mold injection layer of a plastic mold according to claim 1, characterized in that: Step S1 specifically includes: the base includes a product prototype made of polyethylene propylene or other similar materials, protective ink is applied between the protective film and the base, and the position of the protective ink is applied according to the required pattern and texture of the product.

3. A method for processing a front mold injection layer of a plastic mold according to claim 1, characterized in that: Step S2 specifically includes: when the base is drilled with holes, the distance between the bottom of the inner wall of all holes and the bottom of the base is 3 cm, and the injection layer is made of polytetrafluoroethylene.

4. A method for processing a front mold injection layer of a plastic mold according to claim 1, characterized in that: Step S3 specifically includes: the photolithography depth of the texture layer shall not be less than 0.005 mm and shall not exceed 0.008 mm.

5. A method for processing a front mold injection layer of a plastic mold according to claim 1, characterized in that: Step S4 specifically includes: placing the side of the injection layer engraved with the texture toward the side of the injection rubber layer, and the pressure of the injection layer when imprinting the texture is 10 MPa.

6. A method for processing a front mold injection layer of a plastic mold according to claim 5, characterized in that: Remove the waste and scraps remaining when the base is opened.

7. A method for processing a front mold injection layer of a plastic mold according to claim 5, characterized in that: The surface of the protective ink is also coated with a protective layer, and the protective layer is prepared by wear-resistant paint.

8. A method for processing a front mold injection layer of a plastic mold according to claim 1, characterized in that: Steps S5-S6 specifically include: the mold opening process needs to be in a dust-free environment, and the residual glue can be treated by heat treatment and physical treatment.

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