CN113334697B - Processing die and preparation method of air inlet grille - Google Patents
Processing die and preparation method of air inlet grille Download PDFInfo
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- CN113334697B CN113334697B CN202110729131.3A CN202110729131A CN113334697B CN 113334697 B CN113334697 B CN 113334697B CN 202110729131 A CN202110729131 A CN 202110729131A CN 113334697 B CN113334697 B CN 113334697B
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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
- B29C45/26—Moulds
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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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
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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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/42—Moulds or cores; Details thereof or accessories therefor characterised by the shape of the moulding surface, e.g. ribs or grooves
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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
- B29C45/72—Heating or cooling
- B29C45/73—Heating or cooling of the mould
- B29C45/7312—Construction of heating or cooling fluid flow channels
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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
- B29C45/72—Heating or cooling
- B29C45/73—Heating or cooling of the mould
- B29C45/7312—Construction of heating or cooling fluid flow channels
- B29C2045/7318—Construction of heating or cooling fluid flow channels multilayered fluid channel constructions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
Abstract
The application discloses a processing mold and a preparation method of an air inlet grille, which relate to the technical field of automobile processing and manufacturing, and comprise that the air inlet grille to be injection-molded has multiple appearance shapes, each appearance shape corresponds to an area, and the surfaces of cavities of the processing mold corresponding to the multiple appearance shape areas are processed by corresponding appearance shape processes; and a group of independent water paths are arranged in the cavity of the processing mould corresponding to each appearance modeling area, and the water temperature of cooling water flowing through each group of independent water paths is suitable for the corresponding appearance modeling process. The application discloses a manufacturing method of an air inlet grille based on the processing die, which can manufacture the air inlet grille with multiple appearance shapes at low cost and high efficiency.
Description
Technical Field
The application relates to the technical field of automobile processing and manufacturing, in particular to a processing die and a preparation method for an air inlet grille.
Background
Currently, plastic products for automobiles have a wide variety of surface appearance types. Generally, the method is mainly divided into two categories, one is an appearance treatment mode requiring spray plating, such as surface painting, surface plating and the like; one is coating-free appearance treatment, such as chemical texture, laser texture or high-gloss injection molding.
Specifically, the chemical texture is a processing method by chemical liquid corrosion, a required texture pattern is corroded on the surface of a cavity of an injection mold, when the mold is used for production, molten plastic flows through the surface of the cavity of the mold and copies the texture on the mold, and after a plastic part is demoulded, cooled and shaped, the texture specified by a standard texture template is obtained. The laser texture is called as geometric texture relative to chemical texture, namely, a part of metal is etched on the surface of a cavity of an injection mold by a processing method of directly irradiating the surface of the mold through focusing of high-energy laser beams to form the texture with a certain pattern, molten plastic flows through the surface of the cavity of the mold to copy the texture on the mold when the mold is produced by injection molding, after a product is demoulded, cooled and shaped, the texture specified by a standard texture template is obtained, and compared with the chemical texture, the laser texture has a surface three-dimensional effect. The highlight injection molding is a surface appearance form with high brightness and high smoothness of a plastic product, and is also an injection molding mode defined by the appearance of spraying-free plastic, namely, the surface of a cavity of a mold is polished to a mirror surface, molten plastic is filled in the mold for molding, and after demolding, cooling and shaping, the spraying-free effect with high brightness of the surface is obtained.
In comparison, the painting treatment or electroplating treatment has the disadvantages of great environmental pollution, severe working environment, various working procedures and high cost; and the highlight injection molding can obtain a plastic product in the one-time injection molding process and achieve a good appearance effect. Therefore, in the automobile industry, more and more plastic products adopt a spraying-free injection molding process such as high-gloss injection molding or texture injection molding.
However, with the development of the automobile industry, many current automobile manufacturers desire more distinctive and diversified appearance in order to seek better appearance and appearance effects. For example, on a part of plastic, various appearance effects of coexistence of chemical texture, laser texture and high-gloss injection molding are simultaneously embodied.
As shown in fig. 1, in the process of molding an air intake grille product, an air intake grille is required, and three appearance effects are provided: chemical fine texture surface, high-brightness surface and laser carbon fiber geometric texture surface. Specifically, the large-area exposed first region a in fig. 1 is a laser carbon fiber texture surface, that is, the texture of the surface is similar to the pattern of carbon fiber arrangement, and the depth of the texture is required to be 60 μm; the second area b is a chemically etched fine texture surface area, and the texture depth of the second area b is 25 mu m; the third area c is required to be a high-brightness surface, and the surface brightness is a fog mirror surface and even meets the optical surface requirement.
For the modeling requirements of the air inlet grille, the traditional processing method is to split the air inlet grille into three groups of parts, namely split the parts into an air inlet grille body 1, a carbon fiber membrane 3 and a transverse grille decoration strip 2 respectively, wherein the air inlet grille body 1 adopts texture injection molding, a large-area laser texture area at the upper part adopts a bonded carbon fiber membrane, and the carbon fiber membrane is bonded on a first area a of the air inlet grille; the middle three transverse grille decorative strips 2 are three high-brightness injection molding decorative strips, the three high-brightness injection molding transverse grille decorative strips 2 are firstly and independently processed and then assembled with the air inlet grille body 1, and finally coexistence of three appearance models on one air inlet grille is realized.
The traditional processing method can basically meet the appearance requirement of the air inlet grille, but the defects are very obvious, the processing cost of parts is high, the air inlet grille is split into three groups of parts, namely an air inlet grille body 1, three middle transverse grille decoration strips 2 and a carbon fiber membrane 3; after the processing is finished separately, the components need to be assembled and pasted together, so that the assembly cost, the working hour cost, the packaging and transportation cost and the like are high; meanwhile, the carbon fiber membrane 3 needs to be cut to be consistent with the shape of the area to be bonded of the air inlet grille body 1, the cutting, preparation and bonding processes of the carbon fiber membrane 3 are complex, the difficulty is high, and the labor amount is increased; in addition, at least one set of injection mold is required to be added to the three middle transverse grille decorative strips 2, the size of the mold is not equal to that of the air inlet grille body 1, and the investment cost of the mold is high; most importantly, in the assembling process, the carbon fiber membrane 3 is easily stuck badly, the carbon fiber membrane 3 tilts, and the parts are rubbed and damaged, so that the appearance quality of the air inlet grille is difficult to ensure.
Disclosure of Invention
Aiming at the defects in the prior art, the application aims to provide the processing die and the preparation method of the air inlet grille, and the air inlet grille with multiple appearance shapes can be manufactured at low cost and high efficiency.
In order to achieve the above purposes, the technical scheme is as follows: a processing mould of an air inlet grille is characterized in that the air inlet grille to be injection molded has multiple appearance models, each appearance model corresponds to an area, the processing mould comprises a cavity, and the surfaces of the cavities of the processing mould corresponding to the multiple appearance model areas are processed by corresponding appearance model processes; and a group of independent water paths are arranged in the cavity of the processing mould corresponding to each appearance modeling area, and the water temperature of cooling water circulating in each group of independent water paths is suitable for the corresponding appearance modeling process.
On the basis of the technical scheme, the air inlet grille comprises an air inlet grille body and three transverse grille decorative strips, wherein the air inlet grille body has two appearance shapes, namely a first area with laser textures and a second area with chemical textures; the transverse grid decoration strip has an appearance shape and is a third area of high-gloss injection molding, the surface of a cavity of the processing mold corresponding to the first area is subjected to laser texture treatment, the surface of the cavity corresponding to the second area is subjected to chemical texture treatment, and the surface of the cavity corresponding to the third area is subjected to high-gloss treatment;
three groups of independent water paths which are respectively adjacent to the first area, the second area and the third area are arranged in the processing die, the water temperatures of cooling water circulating in the three groups of independent water paths are different, and the respective water temperatures are suitable for respective appearance modeling processes.
On the basis of the technical scheme, the three groups of independent water paths are respectively a first group of independent water paths, a second group of independent water paths and a third group of independent water paths;
the first group of independent water paths correspond to the first area and comprise four independent water paths which feed water from the side of the cavity, are bent for three times and discharge water from the side of the cavity;
the second group of independent water paths corresponds to a second area and comprises two independent water paths for feeding water from one side of the cavity to discharging water from the other side of the cavity;
the third group of independent water paths corresponds to a third area and comprises six independent water paths, and each transverse grid decorative strip controls the water temperature through two independent water paths.
On the basis of the technical scheme, the water temperature of the cooling water in the first group of independent water paths and the second group of independent water paths is 60-80 ℃; the water temperature of the cooling water in the third group of independent water paths is 85-90 ℃.
On the basis of the technical scheme, the texture depth of the processing mould corresponding to the laser texture processing of the cavity surface of the first area is designed to be 60 microns; the texture depth of the processing mold corresponding to the chemical texture treatment of the cavity surface of the second region is designed to be 25 μm, and the processing mold corresponding to the cavity surface of the third region is subjected to highlight treatment.
On the basis of the technical scheme, a boundary line is arranged on the surface of the processing mold corresponding to the cavity of the first area and the cavity of the second area.
On the basis of the technical scheme, the processing mold further comprises a core, the cavity and the core form an air inlet grille, and the side wall draft angles alpha of the cavity and the core are both larger than or equal to 7 degrees; the die cavity and the die core are made of alloy steel, the Cr content in the alloy steel is 1.35%, the NI content is 1.0%, and the factory hardness of the alloy steel is 38-42 HRC.
On the basis of the technical scheme, the height-to-width ratio h/d of the groove formed by the cavity and the core and corresponding to the transverse grid decorative strip (2) is less than or equal to 1:1, and the width d of the root part of the rib groove corresponding to the transverse grid decorative strip is greater than or equal to 20 mm; and the distance e between the openings of the air inlet grids corresponding to two adjacent transverse grid decorative strips is more than or equal to 30 mm.
On the basis of the technical scheme, the three groups of independent water paths are respectively connected with the three mould temperature machines, and the water supply temperatures of the three mould temperature machines are different.
The application relates to a preparation method of an air inlet grille based on the processing mold, which comprises the following steps: carrying out corresponding appearance molding process treatment on the surfaces of the cavities of the processing mold corresponding to the various appearance molding areas;
starting injection molding of the air inlet grille, and simultaneously respectively inputting cooling water with the water temperature suitable for the corresponding appearance molding process into each group of independent water paths;
and (4) finishing the integral injection molding of the air inlet grille, and demolding to obtain the air inlet grille.
The beneficial effect that technical scheme that this application provided brought includes:
1. according to the processing mold and the preparation method of the multi-appearance air inlet grille, the air inlet grille to be injection molded is required to have various appearance shapes, and the surfaces of cavities of the processing mold corresponding to various appearance shape areas are all processed by corresponding appearance shape processes; for example, the first region of the air intake grille is required to be provided with the laser texture, that is, the surface of the cavity of the processing mold corresponding to the first region is subjected to laser texture processing so as to facilitate later injection molding, so that the first region of the air intake grille is provided with the laser texture; the air inlet grille is characterized in that a group of independent water paths are arranged in the processing mold corresponding to each appearance modeling area, the water temperature of cooling water circulating in each group of independent water paths is suitable for a corresponding appearance modeling process, the water temperature is controlled in a partitioning mode, the mold temperature is adjusted in a differentiation mode, the surface of a mold cavity corresponds to different appearance modeling areas, different temperatures are obtained, and then the air inlet grille meeting various appearance modeling is produced.
2. The processing mold can perform one-time injection molding on the air inlet grille, and the molded air inlet grille has various appearance models; the air inlet grille produced by the processing mold is not required to be assembled after being respectively produced by injection molding, and is changed into one-time injection molding by three traditional parts (an air inlet grille body, a carbon fiber diaphragm and a transverse grille decorative strip).
3. According to the processing die, for the air inlet grille with three appearance shapes, specifically, the air inlet grille body has two appearance shapes, namely a first area with laser texture and a second area with chemical texture; the transverse grid decorative strip has an appearance shape and is a third area of high-gloss injection molding; in order to realize the laser carbon fiber texture of the first area, the final three-appearance-shaped air inlet grille can be obtained by pasting the carbon fiber membrane and assembling the 3 middle transverse grille decoration strips with the air inlet grille body, so that the material cost and the working hour cost for pasting the carbon fiber membrane are increased; the processing mold can be used for injection molding of the air inlet grille with three appearance shapes at one time, greatly reduces the production cost and further reduces the cost of the whole automobile.
4. Compared with the multi-part assembling form of the traditional processing method, the processing die does not need transferring and assembling among working procedures, and does not bring poor secondary quality of products; the utility model provides a mold processing, injection moulding air-inlet grille does not have unnecessary process, and the air-inlet grille who produces of moulding plastics can directly get into whole car assembly, has ensured the quality of many appearance modeling air-inlet grille.
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 description of the embodiments are briefly introduced 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 based on these drawings without creative efforts.
FIG. 1 is a schematic sectional view of a conventional air intake grill;
FIG. 2 is an exploded view of a prior art intake grill broken into three components;
fig. 3 is a water path layout diagram of a processing mold of three appearance modeling air inlet grilles provided in the embodiment of the present application;
FIG. 4 is a sectional view of the cavity surface of the processing mold for three appearance modeling of the air intake grille according to the embodiment of the application;
fig. 5 is a sectional view of a cavity water channel of a processing mold for three appearance modeling air intake grilles provided in the embodiment of the present application (only a part of the water channel is shown);
reference numerals: 1. an intake grill body; 2. a transverse grille decoration strip; 3. a carbon fiber membrane; 10. a cavity; 11. and (3) a core.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further 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 invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 3, the present application discloses a processing mold for an air intake grille, which is used for processing an air intake grille with multiple appearance shapes, wherein the air intake grille to be injection molded has multiple appearance shapes, and each appearance shape corresponds to one area. The processing mold comprises a cavity 10 and a core 11, and the surfaces of the cavity 10 of the processing mold corresponding to the various appearance molding areas are processed by corresponding appearance molding processes (for example, if the first area a of the air inlet grille is required to be the appearance molding of laser texture, the surfaces of the cavity 10 of the processing mold corresponding to the first area a are also processed by laser texture). A group of independent water paths are arranged in the cavity 10 of the processing mould corresponding to each appearance modeling area, and the water temperature of cooling water circulating in each group of independent water paths is suitable for the corresponding appearance modeling process.
As shown in fig. 3, in one embodiment, the air intake grille comprises an air intake grille body 1 and three transverse grille decorative strips 2, wherein the air intake grille body 1 has two appearance shapes, namely a first area a of laser texture and a second area b of chemical texture; the transverse grid decoration strip 2 has an appearance shape which is a third area c of high-gloss injection molding. The surface of the cavity 10 of the processing mold corresponding to the first area is processed by laser texture to obtain the appearance of the laser texture. The surface of the cavity 10 corresponding to the second region is subjected to chemical texture treatment to obtain a chemical texture model. The surface of the cavity 10 corresponding to the third area c is subjected to highlight treatment to obtain a highlight mirror surface shape. The air inlet grille injection-molded by using the processing mold can obtain three appearance models.
Three groups of independent water paths which are respectively adjacent to the first area, the second area and the third area are arranged in the processing die, the water temperatures of cooling water circulating in the three groups of independent water paths are different, and the respective water temperatures are suitable for respective appearance modeling processes. Specifically, in the cavity 10 of the processing mold, the water temperature of cooling water circulating in a group of independent water paths adjacent to the first region is suitable for the laser texture appearance molding process; the water temperature of the cooling water circulating in the group of independent water paths adjacent to the second area is suitable for the chemical texture appearance modeling process; the water temperature of the cooling water circulating in the group of independent water paths adjacent to the third area is suitable for the high-light mirror surface appearance modeling process.
In other embodiments, the air inlet grille can also have more than four appearance models, and four groups of independent water paths are arranged.
As shown in fig. 3, the three groups of independent waterways are a first group of independent waterways, a second group of independent waterways, and a third group of independent waterways, respectively. The first group of independent water paths, the second group of independent water paths and the third group of independent water paths are all located in the cavity 10. The first group of independent waterways corresponds to the first area a and includes four independent waterways into which water is introduced from the side of the cavity 10, and which are bent three times and discharged from the side of the cavity 10. The second group of independent water paths corresponds to a second region, and includes two independent water paths for feeding water from one side of the cavity 10 to discharging water from the other side of the cavity 10. The third group of independent water paths corresponds to a third area and comprises six independent water paths, and the water temperature of each transverse grid decorative strip 2 is controlled through two independent water paths.
Specifically, the water paths of the cavity 10 need to be controlled IN a partitioned manner, that is, the laser texture surface of the first area a, the chemical texture surface of the second area b, and the high-brightness surface of the third area c open different water paths IN the cavity 10, as shown IN fig. 3, 1-1-IN, 1-2-IN, and 1-3-IN are side water path inlets of the cavity 10 corresponding to the laser texture surface, and 1-1-OUT, 1-2-OUT, and 1-3-OUT are side water path outlets of the cavity 10 corresponding to the laser texture surface. 2-1-IN and 2-2-IN are side waterway water inlets of the cavity 10 corresponding to the chemical texture surface, and 2-1-OUT and 2-2-OUT are side waterway water outlets of the cavity 10 corresponding to the chemical texture surface. 3-1-IN, 3-2-IN and 3-3-IN are side waterway water inlets of the cavity 10 corresponding to the high bright surface, and 3-1-OUT, 3-2-OUT and 3-3-OUT are side waterway water outlets of the cavity 10 corresponding to the high bright surface.
In one embodiment, the water temperature of the cooling water in the first group of independent water paths and the second group of independent water paths is 60-80 ℃; the water temperature of the cooling water in the third group of independent water paths is 85-90 ℃.
The application of the processing mold has the advantages that the surface of a product is provided with 3 partitions, the surface appearance requirements of different areas are different, and the corresponding areas on the surface of the cavity 10 of the mold are required to be respectively provided with laser textures, chemical textures and highlight mirror surface effects. Meanwhile, the temperature of the three areas is controlled in a differentiated mode, the high light surface area needs high mold temperature, if the temperature is low, the color of the bright surface is dark, the color difference is obvious, and the mold temperature needs to reach 85-90 ℃; the injection molding temperature of the laser texture and the chemical texture is relatively low, if the temperature is too high, the texture is easy to scald or stretch, or the texture is not clear, and the requirement can be met at 60-80 ℃.
Further, the processing mold is designed to have a texture depth of 60 μm corresponding to the laser texturing process of the surface of the cavity 10 of the first region a; the processing mold is designed to have a texture depth of 25 μm corresponding to the chemical texture treatment of the surface of the cavity 10 of the second region b, and the processing mold is highly polished corresponding to the surface of the cavity 10 of the third region.
The smoothness of the surface of the cavity 10 of the processing mold corresponding to the third region c is up to a level of a1 after being subjected to a high light treatment. Specifically, the highlight treatment to a mirror surface a1 level is equivalent to a 8000# sandpaper level.
In one embodiment, the processing mold is divided into a cavity 10 and a core 11, the cavity 10 and the core 11 form an injection molding cavity of the air inlet grille, and the side wall draft angles alpha of the cavity 10 and the core 11 are both larger than or equal to 7 degrees; the die cavity 10 and the die core 11 are made of alloy steel, the Cr content in the alloy steel is 1.35%, the NI content is 1.0%, and the factory hardness of the alloy steel is 38HRC-42 HRC.
The application of the processing die requires that the content of internal elements of steel, particularly the content of Cr, NI and the like, needs to reach a certain standard, and meanwhile, the die needs to have high temperature resistance to meet the production environment in a high-temperature state. In order to meet the requirements of chemical textures and laser textures, steel adopted by the processing mold needs to have good processing performance, so that three appearance models need to be met simultaneously for products with three appearance models and the selection of steel of the injection mold. The die steel material for processing the die selects German imported Gelitz XPM-ESR steel material, the content of Cr in the die steel material is 1.35 percent, the content of NI in the die steel material is 1.0 percent, the outgoing hardness of the steel material is 38HRC-42HRC, and the die steel material is electroslag remelting die steel material.
As shown in FIG. 4, in one embodiment, the cavity 10 and the core 11 form an injection cavity corresponding to the transverse grid decorative strip 2, the groove height-to-width ratio h/d is less than or equal to 1:1, and the rib groove root width d corresponding to the transverse grid decorative strip 2 is greater than or equal to 20 mm; and the distance e between the openings of the air inlet grids corresponding to two adjacent transverse grid decorative strips 2 is more than or equal to 30 mm.
Specifically, considering factors such as production demoulding and cooling water channel arrangement at the later stage of the air inlet grille, the second area is a chemical fine texture surface, and the third area is a high-brightness surface, so that after the air inlet grille is subjected to injection molding at the later stage, the air inlet grille cannot be stuck to the side of a cavity and cannot be taken, the side wall drawing angles alpha of the second area and the third area of a product are strictly limited, alpha is required to be more than or equal to 7 degrees, the height-to-width ratio h/d of the V-shaped groove of the middle transverse grille decorative strip and the size of the opening width of an air inlet grid are limited, the height-to-width ratio h/d of the V-shaped groove of the transverse grille decorative strip is required to be less than or equal to 1, the bottom width d is more than or equal to 20mm, the opening width e of the transverse grille decorative strip is more than or equal to 30mm, otherwise, and the cavity of a processing mold is not convenient for arranging an effective cooling water channel.
A schematic cross-sectional view of the working mold corresponding to fig. 4 is shown in fig. 5, fig. 5 reflecting a portion of the water path within the mold cavity 10.
In one embodiment, the three groups of independent water paths are respectively connected with three mold temperature machines, and the water supply temperatures of the three mold temperature machines are different. The water path and the water temperature are controlled in a partition mode in the structural design of the mold, when injection molding is carried out, the water paths controlled in the three partition modes are respectively connected with the mold temperature controllers which are not communicated, the three mold temperature controllers can provide different water temperatures according to actual production requirements, the temperatures of different areas of the cavity 10 are adjusted in a differentiated mode, areas with different appearance molding definition requirements on the processing mold can be processed, different temperatures can be obtained, and then air inlet grille products meeting the three appearance moldings can be produced.
The water temperature of the cooling water in the first group of independent water paths and the second group of independent water paths is 60-80 ℃; the water temperature of the cooling water in the third group of independent water paths is 85-90 ℃. The water temperature of the cooling water of the chemical texture and the laser texture is basically the same, but three groups of water paths are controlled in a partition mode instead of two groups of water paths, so that the window for adjusting the injection molding production process is wider, when the laser texture and the chemical texture have certain quality difference or defects, three groups of different water paths can be used for respectively carrying out fine injection molding parameter adjustment, and the adjusted window is wider. For example, the waterway water temperature corresponding to the laser texture is maintained at 65 ℃, while the waterway water temperature of the chemical texture is maintained at 80 ℃.
Further, the processing mold is provided with a boundary line corresponding to the surfaces of the cavity 10 of the first and second regions. In order to better realize the laser texture and chemical texture effects, a boundary line is formed at the boundary between the chemical texture region and the laser texture region on the surface of the cavity 10 of the processing mold. The boundary line is used as the boundary line of the chemical texture and the laser texture, and if the boundary line does not exist, texture etching over-boundary is easily generated in the texture corrosion process, so that the texture is irregular, and the satisfactory texture effect cannot be achieved.
The application also discloses a preparation method of the air inlet grille based on the processing mould, which comprises the following steps:
carrying out corresponding appearance modeling process treatment on the surface of the cavity 10 of the processing mold corresponding to the various appearance modeling areas;
starting injection molding of the air inlet grille, and simultaneously respectively inputting cooling water with the water temperature suitable for the corresponding appearance molding process into each group of independent water paths;
and (4) finishing the integral injection molding of the air inlet grille, and demolding to obtain the air inlet grille.
The processing mold requires that the air inlet grille to be injection molded has various appearance shapes, and the surfaces of cavities 10 of the processing mold corresponding to various appearance shape areas are all processed by corresponding appearance shape processes; for example, the first region of the air intake grille is required to be provided with the laser texture, that is, the surface of the cavity 10 of the processing mold corresponding to the first region is subjected to laser texture processing so as to facilitate later injection molding, so that the first region of the air intake grille is provided with the laser texture; the key point is that a group of independent water paths are arranged in the cavity 10 of the processing mold corresponding to each appearance molding area, the water temperature of cooling water flowing through each group of independent water paths is suitable for the corresponding appearance molding process, the water temperature is controlled in a partitioning mode, the mold temperature is adjusted in a differentiated mode, the surface of the cavity corresponds to the areas with different appearance moldings, different temperatures are obtained, and then the air inlet grille meeting various appearance moldings is produced.
The processing mold can perform one-time injection molding on the air inlet grille, and the molded air inlet grille has various appearance models; the air inlet grille produced by the processing mold does not need to be assembled after being produced by injection molding respectively, and the traditional three parts (the air inlet grille body 1, the carbon fiber membrane 3 and the transverse grille decoration strip 2) are changed into one-step injection molding, compared with the traditional processing mode of the air inlet grille with multiple appearance shapes, the processing mold integrates multiple appearance shapes realized on multiple sets of molds to one set of mold through the zone control of water temperature, so that the cost of investment in the mold is reduced, and the cost of the mold is greatly saved; for the model designer, the boundary limitation of the model is broken through, for the product designer, the product design scheme is optimized, the parts do not need to be disassembled, a plurality of groups of parts are designed, the assembly relation among the parts is considered, and the workload of the designer is reduced.
According to the processing die, for the air inlet grille with three appearance shapes, specifically, the air inlet grille body has two appearance shapes, namely a first area with laser texture and a second area with chemical texture; the transverse grid decorative strip has an appearance shape and is a third area of high-gloss injection molding; in order to realize the laser carbon fiber texture of the first area, the final three-appearance-shaped air inlet grille can be obtained by pasting the carbon fiber membrane and assembling the 3 middle transverse grille decoration strips with the air inlet grille body, so that the material cost and the working hour cost for pasting the carbon fiber membrane are increased; the processing mold can be used for injection molding of the air inlet grille with three appearance shapes at one time, greatly reduces the production cost and further reduces the cost of the whole automobile.
Compared with the multi-part assembling form of the traditional processing method, the processing die does not need transferring and assembling among working procedures, and does not bring poor secondary quality of products; the utility model provides a mold processing, injection moulding air-inlet grille does not have unnecessary process, and the air-inlet grille of producing out of moulding plastics can directly get into whole car assembly, has ensured the quality of many outward appearance molding air-inlet grille.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly and encompass, for example, both fixed and removable coupling as well as integral coupling; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. The processing mold of the air inlet grille comprises an air inlet grille body (1) and three transverse grille decorative strips (2), wherein the air inlet grille body (1) has two appearance shapes, namely a first area of laser texture and a second area of chemical texture; horizontal grid trim (2) have an outward appearance molding, for the third region of highlight injection molding, its characterized in that:
the processing mould comprises a cavity (10), and the surfaces of the cavity (10) of the processing mould corresponding to various appearance moulding areas are processed by corresponding appearance moulding processes; a group of independent water paths are arranged in the cavity (10) of the processing mould corresponding to each appearance modeling area, and the water temperature of cooling water circulating in each group of independent water paths is suitable for the corresponding appearance modeling process;
the surface of the processing mould corresponding to the cavity (10) of the first area is subjected to laser texture treatment, the surface of the cavity (10) corresponding to the second area is subjected to chemical texture treatment, and the surface of the cavity (10) corresponding to the third area is subjected to highlight treatment;
three groups of independent water paths which are respectively adjacent to the first area, the second area and the third area are arranged in the processing die, the water temperatures of cooling water circulating in the three groups of independent water paths are different, and the respective water temperatures are suitable for respective appearance modeling processes.
2. The mold for manufacturing an intake grill as recited in claim 1, wherein: the three groups of independent water paths are respectively a first group of independent water paths, a second group of independent water paths and a third group of independent water paths;
the first group of independent water paths correspond to the first area and comprise four independent water paths which are used for feeding water from the side of the cavity (10), bending for three times and discharging water from the side of the cavity (10);
the second group of independent water paths corresponds to a second area and comprises two independent water paths which feed water from one side of the cavity (10) to discharge water from the other side of the cavity (10);
the third group of independent water paths corresponds to a third area and comprises six independent water paths, and each transverse grid decorative strip (2) controls the water temperature through two independent water paths.
3. The mold for manufacturing an intake grill as recited in claim 2, wherein: the water temperature of the cooling water in the first group of independent water paths and the second group of independent water paths is 60-80 ℃; the water temperature of the cooling water in the third group of independent water paths is 85-90 ℃.
4. The mold for manufacturing an intake grill as recited in claim 1, wherein: the texture depth of the processing mould corresponding to the laser texture processing of the surface of the cavity (10) of the first area is designed to be 60 mu m; the texture depth of the processing mould corresponding to the chemical texture treatment of the surface of the cavity (10) of the second area is designed to be 25 mu m, and the surface of the processing mould corresponding to the cavity (10) of the third area is subjected to highlight treatment.
5. The mold for manufacturing an intake grill as recited in claim 4, wherein: the processing mold is provided with a boundary line corresponding to the surfaces of the cavity (10) of the first and second regions.
6. The mold for manufacturing an intake grill as recited in claim 1, wherein: the processing mould also comprises a core (11), the cavity (10) and the core (11) form an injection molding cavity of the air inlet grille, and the side wall draft angles alpha of the cavity (10) and the core (11) are both larger than or equal to 7 degrees; the die cavity (10) and the die core (11) are made of alloy steel, the Cr content in the alloy steel is 1.35%, the NI content is 1.0%, and the factory hardness of the alloy steel is 38HRC-42 HRC.
7. The mold for manufacturing an intake grill as recited in claim 6, wherein: the groove height-to-width ratio h/d of the injection molding cavity corresponding to the transverse grid decorative strip (2) formed by the cavity (10) and the core (11) is less than or equal to 1:1, and the width d of the root part of the rib groove corresponding to the transverse grid decorative strip (2) is more than or equal to 20 mm; and the distance e between the openings of the air inlet grids corresponding to two adjacent transverse grid decorative strips (2) is more than or equal to 30 mm.
8. The mold for manufacturing an intake grill as recited in claim 1, wherein: the three groups of independent water paths are respectively connected with three mould temperature machines, and the water supply temperatures of the three mould temperature machines are different.
9. A method for preparing an air intake grille based on the processing mold of claim 1, comprising the steps of:
carrying out corresponding appearance molding process treatment on the surface of a cavity (10) of the processing mold corresponding to various appearance molding areas;
starting injection molding of the air inlet grille, and simultaneously respectively inputting cooling water with the water temperature suitable for the corresponding appearance molding process into each group of independent water paths;
and finishing the integral injection molding of the air inlet grille, and demolding to obtain the air inlet grille.
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