CN113146939A - Surface treatment method for mold cavity and injection molding method - Google Patents
Surface treatment method for mold cavity and injection molding method Download PDFInfo
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- CN113146939A CN113146939A CN202110302565.5A CN202110302565A CN113146939A CN 113146939 A CN113146939 A CN 113146939A CN 202110302565 A CN202110302565 A CN 202110302565A CN 113146939 A CN113146939 A CN 113146939A
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- 238000004381 surface treatment Methods 0.000 title claims abstract description 23
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- 239000007924 injection Substances 0.000 claims abstract description 32
- 238000011282 treatment Methods 0.000 claims abstract description 21
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/1753—Cleaning or purging, e.g. of the injection unit
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
- B29C45/77—Measuring, controlling or regulating of velocity or pressure of moulding material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
- B29C45/78—Measuring, controlling or regulating of temperature
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C2045/1784—Component parts, details or accessories not otherwise provided for; Auxiliary operations not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76494—Controlled parameter
- B29C2945/76498—Pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76494—Controlled parameter
- B29C2945/76531—Temperature
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76494—Controlled parameter
- B29C2945/76551—Time
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76494—Controlled parameter
- B29C2945/76595—Velocity
Abstract
The application is applicable to the technical field of injection molds and injection molding, and provides a mold cavity surface treatment method and an injection molding method, wherein the mold cavity surface treatment method comprises the steps of removing oil from the inner surface of a mold cavity and washing the mold; and carrying out texture etching treatment on the inner surface of the mold cavity after oil removal and mold washing to form a texture layer on the inner surface of the mold cavity. The application provides a mould cavity surface treatment method, carry out the line technology through the internal surface to the mould cavity and handle, make its internal surface form the line layer, and then the internal surface area of contact of mould cavity has been increaseed, thereby make double-shot flexible glue product of double-colored injection mold can smoothly leave the type, in addition, the line layer can both prevent that the flexible glue vacuum from inhaling and gluing the mould under the different circumstances of moulding plastics, the problem of gluing the mould has been avoided leading to vacuum adsorption, very big improvement the production adaptability of mould, the production efficiency is promoted, the mould maintenance frequency is reduced, thereby manufacturing cost and maintenance cost are reduced.
Description
Technical Field
The application relates to the technical field of injection molds and injection molding, in particular to a mold cavity surface treatment method and an injection molding method.
Background
At present, with the rapid development of injection molding technology, the application range of the double-color injection molding encapsulation technology in the injection mold industry is more and more extensive. For the injection mold for double-color injection molding encapsulation, the inner surface of a cavity of the existing injection mold is smooth, plastic raw materials enter the cavity in a molten state, and because the temperature of the mold is high, particularly elastomer soft rubber materials are influenced by the temperature of the mold, the molding period of the injection mold is long, a two-shot soft rubber runner is easily stuck to the cavity of the mold, and the inner side of a product is damaged by pulling, so that the molding is difficult.
Disclosure of Invention
An object of the embodiment of the application is to provide a method for processing the surface of a mold cavity, which aims to solve the technical problems that the inner surface of the mold cavity of an injection mold in the prior art is smooth, and plastic raw materials enter the mold cavity in a molten state and are influenced by the temperature of the mold, so that the molding period of the plastic raw materials is long in the injection molding process, and a two-shot soft plastic runner is easy to stick to the mold cavity, so that the inner side of a product is damaged and the molding is difficult.
In order to achieve the above object, the first aspect of the present application adopts the following technical solutions: provided is a mold cavity surface treatment method, including the steps of:
removing oil from the inner surface of the die cavity and washing the die;
and carrying out texture etching treatment on the inner surface of the mold cavity after oil removal and mold washing to form a texture layer on the inner surface of the mold cavity.
Further, the step of performing the texture etching treatment on the inner surface of the mold cavity after the oil removal and mold washing comprises the following steps: sticking a mould, chemical inspection, surface treatment, printing treatment, chemical etching, surface treatment, QC, rust prevention treatment and packaging.
Further, the printing treatment also comprises a decoration treatment.
Further, the texture layer is etched 30 # young veins.
Further, the thickness of the grain layer is 0.03mm to 0.15 mm.
The second aspect of the present application also provides a method for performing injection molding on the mold cavity obtained by the above processing method, including the steps of:
controlling the temperature, including the molding temperature and the temperature of the grinding tool, within a first preset temperature range according to the structure of a product to be injection-molded, and controlling the temperature of the mould within a second preset temperature range;
controlling the pressure, including controlling the pressure value of the back pressure in a first preset pressure value range and controlling the pressure value of the injection pressure in a second preset pressure range;
time control, wherein the total injection molding time, the pressure maintaining time, the cooling time, the mold opening and closing time and the ejection time are controlled within a preset time range;
and controlling the speed, including the injection speed and the feed back speed, and controlling the rotating speeds of the injection speed and the feed back speed to be a first preset speed and a second preset speed respectively.
Further, the first preset temperature range is 176 ℃ to 230 ℃; and
the second predetermined temperature range is 15 ℃ to 20 ℃.
Further, the first preset pressure value ranges from 0.3MPa to 1.4 MPa; and
the second preset pressure value ranges from 60MPa to 95 MPa.
Further, the preset time range is 20s to 50 s.
Further, the rotating speed values of the first preset speed and the second preset speed are 20r/min to 30 r/min.
The application provides a mould cavity surface treatment method's beneficial effect lies in: compared with the prior art, the mold cavity surface treatment method has the advantages that the inner surface of the mold cavity is subjected to texture etching technical treatment, the inner surface of the mold cavity is enabled to form the texture layer, the inner surface contact area of the mold cavity is further increased, the two-shot soft rubber product of the double-shot injection mold can be smoothly released, in addition, the texture layer can prevent the soft rubber from being sucked and adhered under different injection molding conditions, the problem that the vacuum adsorption causes the adhesion of the mold is avoided, the production adaptability of the mold is greatly improved, the production efficiency is improved, the mold maintenance frequency is reduced, the production cost and the maintenance cost are reduced, and the market competitiveness of the product is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic flow chart of a method of treating a surface of a mold cavity according to one embodiment of the present application;
fig. 2 is a schematic flow chart of an injection molding method according to another embodiment of the present application.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In order to explain the technical solutions of the present application, the following detailed descriptions are made with reference to specific drawings and examples.
As shown in fig. 1, an embodiment of the present application provides a mold cavity surface treatment method, including:
s101, removing oil and washing a mold on the inner surface of a mold cavity;
and S102, carrying out texture etching treatment on the inner surface of the mold cavity after oil removal and mold washing to form a texture layer on the inner surface of the mold cavity.
The embodiment of the application provides a mold cavity surface treatment method, through carrying out the technology processing of eroding the line to the internal surface of mold cavity, make its internal surface form the line layer, and then the internal surface area of contact of mold cavity has been increaseed, thereby it can smoothly leave the type to reach double-shot flexible glue product of double-colored injection mold, in addition, the line layer can both prevent that the flexible glue vacuum from inhaling and gluing the mould under the different circumstances of moulding plastics, the problem of gluing the mould has been avoided leading to vacuum adsorption, very big improvement the production adaptability of mould, production efficiency has been promoted, the mould maintenance frequency has been reduced, thereby manufacturing cost and maintenance cost have been reduced, the market competitiveness of product has been improved.
It should be noted that the degreasing and mold cleaning may be performed by soaking and cleaning, degreasing agent cleaning, and the like, which is mainly a commonly used degreasing and mold cleaning method in the injection mold, and in addition, the inner surface of the mold cavity may be subjected to etching treatment, such as chemical etching or electroplating etching, and the like, which is not repeated herein.
In the above embodiment of the present application, specifically, in the step of performing the texturing process on the inner surface of the mold cavity after the oil removal and mold washing, that is, in step S102, the method further includes the specific step S1021: sticking, chemical inspection, surface treatment, printing treatment, chemical etching, surface treatment, QC (QUALITY CONTROL in Chinese), rust prevention treatment and packaging.
In this embodiment, the specific operations in step S1021 may be selected as:
step S10211, degreasing and washing the mold, namely, washing oil stains and impurities on the surface of a mold cavity, immediately protecting a preset special required surface after washing, and spraying black paint for protection, rust prevention and scraping prevention after general mirror surface washing;
step S10212, die bonding: the method comprises the following steps of (1) sticking a special adhesive tape on the surface without etching, wherein at least three layers of adhesive tapes are usually stuck, sealing the boundary of an etching surface by using wax after sticking is finished, and cleaning the etching surface again, wherein when the etching surface and a non-etching surface are in a junction with an R angle, the R angle is as small as possible and is generally not more than R0.5mm;
step S10213, chemical examination, in which the surface of the mold without adhesive tape is chemically corroded by 0.01-0.02mm and black; marking the welding position on the die, wherein the hardness difference of each part of the die is less than HRC5, and when the material or hardness difference is not large, the die is separated to etch the grain, and the time of etching the grain is adjusted; when the sand hole is small, filling the sand hole with wax and then etching the lines; c, the difference between the material quality and the hardness after welding is small, the difference between the hardness and the hardness is large by adopting the first method, and the welding position can be locally heated and then the texture is etched;
step S10214, surface treatment: sand washing, namely uniformly spraying sand on the corroded surface of the mold by using a spray gun to remove a black oxide layer on the surface of the mold cavity, wherein the surface of the mold cavity is silvery white after sand washing;
step S10215, printing: a, printing patterns, namely etching a standard pattern plate (zinc) by using a film, then uniformly waxing the pattern plate, then transferring the patterns on a special film by using a rolling machine to manufacture wax paper, sticking the wax paper on the surface of a sand washed mold according to requirements, and transferring the patterns to the mold; b, manufacturing a film according to the texture drawing, sticking the film on a die according to the texture requirement, and controlling the position of the film on the die; c, spraying lines, namely, mixing ink (mainly mixing the size of ink particles) according to the line requirements, and then uniformly spraying the ink on the surface of the die needing line etching by using a line spraying gun;
step S10216, chemical etching: and soaking the transfer-printed mold or the mold with good lines and the mold with the film in the prepared chemical liquid medicine to corrode the bright part of the mold, wherein the corrosion depth is mainly controlled by the soaking time, and the surface of the mold is black after corrosion. The process is similar to chemical examination, and mainly suitable for different chemical agents and different soaking times;
step S10217, surface treatment, namely uniformly spraying sand particles on the corroded surface of the die by a spray gun for sand washing to remove a black oxide layer on the surface of a die cavity of the die, wherein the surface of the die cavity of the die is silvery white after sand washing, in addition, the sand blasting treatment process is the same as the sand washing method except that the size of the sand particles is different, the sand particles punch small pits on the surface of the die cavity of the die under the action of high-pressure air, and the grain retention time of sand blasting treatment is short.
Step S10218, QC, identifying the etching effect according to the pattern requirement to ensure the quality consistency;
step S10219, rust prevention treatment: carrying out rust prevention treatment on the mould meeting the requirements, and spraying special rust prevention oil;
step S102110, packaging: the grain part is protected by special wrinkle glue, thereby meeting the normal injection molding production.
In the above embodiments of the present application, optionally, a decoration process is further included after the printing process.
In this embodiment, decorate the processing to it after the stamp is handled, improve the required quality of line, and then more smooth and easy when guaranteeing the drawing of patterns.
In some embodiments of the present application, optionally, the textured layer is etched 30 # microgrooves.
In this embodiment, the stamp processing can etch 30 # young lines, and the line layer that 30 # young lines formed is more smooth and easy when using the drawing of patterns with two penetrate the soft glue product, the drawing of patterns of being convenient for.
In some embodiments of the present application, optionally, the textured layer has a thickness of 0.03mm to 0.15 mm.
In this embodiment, can be to the flexible glue product of different materials, the line layer of the different degree of depth of preparation can make a mould like this to a software product, realizes standardizing, the mode is produced and is made, and then improves production efficiency, reduction in production cost.
As shown in fig. 2, an embodiment of the second aspect of the present application further provides a method for performing injection molding on a mold cavity obtained by the above processing method, including:
step S201, controlling temperature, including molding temperature and grinding tool temperature, within a first preset temperature range according to the structure of a product to be injection-molded, and controlling the mould temperature within a second preset temperature range;
specifically, the molding temperature can be set according to the material of the product to be injection-molded, the temperature distribution gradually rises from one side of the hopper, the interval between each section is 3-5 ℃, the effect of uniform plasticization is achieved, the injection temperature is 5 ℃ lower than the highest temperature, and the plastic grease is prevented from drooling; the temperature of the die is related to the size of a product according to the crystallinity of a material, the temperature of the die is controlled by adopting a constant temperature medium, the temperature of the die is too low, the crystallinity of the product is low, and post shrinkage and performance reduction can be caused.
Step S202, controlling pressure, including controlling the pressure value of back pressure in a first preset pressure value range and controlling the pressure value of injection pressure in a second preset pressure range;
specifically, the injection pressure is adjusted by a machine overflow valve, in order to ensure that the temperature of the melt is uniform, a good plasticizing effect is obtained, the melt gas is discharged, the injection pressure overcomes the flow resistance of the material from the material barrel to the cavity in the injection mold filling process, the melt is filled into the cavity of the mold, and is compacted, the injection pressure is related to the flow resistance, the filling rate and the melt viscosity, the pressure is accurately controlled within a second preset pressure range, and the pressure can be maintained by about half of the injection pressure.
Step S203, time control, wherein the total injection molding time, the pressure maintaining time, the cooling time, the mold opening and closing time and the ejection time are controlled within a preset time range; the control of each time is related to the hardness of the material to be injection molded, the thickness of the product and the temperature of the mold, for example, the injection molding time is controlled to be 2 to 5 seconds, the pressure maintaining time is 1 to 2 seconds, the cooling time is 5 to 15 seconds, and the other time is 3 to 10 seconds (mold opening and closing time and ejection time), so that the two-shot soft rubber product of the two-color injection mold can be smoothly released.
And step S204, controlling the speed, including the injection speed and the feed back speed, and controlling the rotation speeds of the injection speed and the feed back speed to be a first preset speed and a second preset speed respectively.
In some embodiments of the present application, optionally, the first preset temperature range is 176 ℃ to 230 ℃; and
the second predetermined temperature range is 15 ℃ to 20 ℃.
In the embodiment, the molding temperature can be set according to the material of the product to be injection-molded, the molding temperature can be controlled within a first preset temperature range of 176 ℃ to 230 ℃ according to the structure of the product, meanwhile, the mold temperature is controlled within a second preset temperature range of 15 ℃ to 20 ℃, so that the constant temperature medium is controlled, the water chiller can be adopted to control the temperature within 15-20 ℃, and the shrinkage or performance reduction caused by too low product crystallinity is avoided.
In some embodiments of the present application, optionally, the first preset pressure value ranges from 0.3MPa to 1.4 MPa; and
the second preset pressure value ranges from 60MPa to 95 MPa.
In this embodiment, the first predetermined pressure value range is 0.3MPa to 1.4MPa to make the melt temperature uniform, so as to obtain a good plasticizing effect, and the second predetermined pressure value range is 60MPa to 95MPa to ensure that the flow resistance of the material from the charging barrel to the cavity is overcome during the injection and mold filling.
In some embodiments of the present application, optionally, the preset time range is 20s to 50 s.
In some embodiments of the present application, optionally, the rotation speed values of the first preset speed and the second preset speed are 20r/min to 30 r/min. Particularly, the injection speed can be controlled according to the thickness of the product, and the injection effect is ensured.
To sum up, the embodiment of the application provides a mould cavity surface treatment method, carry out the line technology through the internal surface to the mould cavity and handle, make its internal surface form the line layer, and then the internal surface area of contact of mould cavity has been increaseed, thereby make double-shot flexible glue product of double-colored injection mold can smoothly leave the type, in addition, the line layer can both prevent that the flexible glue vacuum from inhaling and gluing the mould under the different circumstances of moulding plastics, the problem of gluing the mould has been avoided leading to vacuum adsorption, very big improvement the production adaptability of mould, the production efficiency is promoted, the mould frequency of maintenance is reduced, thereby manufacturing cost and maintenance cost are reduced, the market competitiveness of the product is improved.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A method for treating the surface of a mold cavity is characterized by comprising the following steps:
removing oil from the inner surface of the die cavity and washing the die;
and carrying out texture etching treatment on the inner surface of the mold cavity after oil removal and mold washing to form a texture layer on the inner surface of the mold cavity.
2. The method for treating the surface of the mold cavity according to claim 1, wherein the step of texturing the inner surface of the mold cavity after the oil removal and mold washing comprises the steps of: sticking a mould, chemical inspection, surface treatment, printing treatment, chemical etching, surface treatment, QC, rust prevention treatment and packaging.
3. The mold cavity surface treatment method according to claim 2, further comprising a finishing treatment after the embossing treatment.
4. The mold cavity surface treatment process of claim 1, wherein the textured layer is etched 30-gauge microgrooves.
5. The mold cavity surface treatment process of claim 1, wherein the textured layer has a thickness of 0.03mm to 0.15 mm.
6. A method of injection moulding with a mould cavity according to claims 1 to 5, comprising the steps of:
controlling the temperature, including the molding temperature and the temperature of the grinding tool, within a first preset temperature range according to the structure of a product to be injection-molded, and controlling the temperature of the mould within a second preset temperature range;
controlling the pressure, including controlling the pressure value of the back pressure in a first preset pressure value range and controlling the pressure value of the injection pressure in a second preset pressure range;
time control, wherein the total injection molding time, the pressure maintaining time, the cooling time, the mold opening and closing time and the ejection time are controlled within a preset time range;
and controlling the speed, including the injection speed and the feed back speed, and controlling the rotating speeds of the injection speed and the feed back speed to be a first preset speed and a second preset speed respectively.
7. The method of injection molding according to claim 6, wherein the first predetermined temperature range is 176 ℃ to 230 ℃; and
the second predetermined temperature range is 15 ℃ to 20 ℃.
8. The injection molding method of claim 6, wherein the first predetermined pressure value ranges from 0.3MPa to 1.4 MPa; and
the second preset pressure value ranges from 60MPa to 95 MPa.
9. The method of injection molding according to claim 6, wherein the predetermined time is in a range of 20s to 50 s.
10. The method of injection molding according to claim 6, wherein the first predetermined speed and the second predetermined speed have a rotational speed value of 20r/min to 30 r/min.
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| CN202110302565.5A CN113146939A (en) | 2021-03-22 | 2021-03-22 | Surface treatment method for mold cavity and injection molding method |
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| CN202110302565.5A CN113146939A (en) | 2021-03-22 | 2021-03-22 | Surface treatment method for mold cavity and injection molding method |
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| CN114179312A (en) * | 2021-12-21 | 2022-03-15 | 三信化工株式会社 | Resin tableware subjected to pattern etching treatment and injection mold |
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Application publication date: 20210723 |