CN107139439B - Car roof hot-press forming die and forming method thereof - Google Patents
Car roof hot-press forming die and forming method thereof Download PDFInfo
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- CN107139439B CN107139439B CN201710576466.XA CN201710576466A CN107139439B CN 107139439 B CN107139439 B CN 107139439B CN 201710576466 A CN201710576466 A CN 201710576466A CN 107139439 B CN107139439 B CN 107139439B
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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
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/26—Component parts, details or accessories; Auxiliary operations
- B29C51/30—Moulds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/24—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass dies
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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
- B29L2031/3005—Body finishings
- B29L2031/3011—Roof linings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Laminated Bodies (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Mounting, Exchange, And Manufacturing Of Dies (AREA)
Abstract
The invention discloses a car roof hot-press forming die and a forming method thereof, wherein a laminated and bonded high-density board is adopted as a die body, a die surface is formed on the die surface of the die body through bonding glass fiber cloth, the car roof meets the material hot-press requirement completely, the glass fiber reinforced plastic has heat resistance and wear resistance, and the die cost is greatly reduced; according to the method, a numerical control machine tool is adopted to mill the convex surface and the concave surface of the die, the die precision is improved, the processed convex surface and concave surface of the die are bonded with a plurality of layers of glass fiber cloth, the heat resistance and wear resistance of the glass fiber cloth are fully exerted, the service life of the die is prolonged, on the other hand, the die body and the die frame are connected by bolts and bonding materials, and on the premise that the normal use of the die is ensured, the die body is convenient to replace.
Description
Technical Field
The invention relates to the technical field of car roof hot press molding, in particular to a car roof hot press molding die and a car roof hot press molding method.
Background
The car roof is an important component of the whole car interior, the interior roof and the car interior sheet metal roof are attached, the practicability and the decoration are both realized, the car roof is used as a roof decoration in the car, the luxury feeling and the comfort of the car are required to be increased, the car roof has excellent performances of flame retardance, dirt resistance, high color fastness and the like, meanwhile, the noise in the car and the heat conduction outside the car are required to be reduced, the head of an occupant is protected, the skeleton layer at the back of the car roof plays an important role in maintaining the physical and mechanical properties of a product, and the classification, the processing technology and the like of the interior roof are directly related to the skeleton layer.
The car roof can be divided into a surface layer and a framework layer from the aspect of large structure, the surface layer and the framework layer are compounded together in a hot pressing or bonding mode, and the framework layer is formed by thermoplastic or thermosetting plates and is used for keeping the stiffness of the roof so that the roof is not easy to deform.
Because the roof of the car needs to be mutually matched according to the roof structure, factors such as attractive appearance and the like are also needed to be considered, generally curved surface modeling is adopted, the currently adopted processing method is a hot press molding method, namely, a segmented composite material is put into an oven to be heated to a certain temperature and then is hot pressed and molded by a hydraulic molding machine, the existing molding dies mostly adopt steel dies which are installed on the hot press molding machine through steel structure die frames, the roof of the car needs to be modified according to customer requirements at any time in the processing process, the steel dies have higher cost, the polishing and maintenance are more complicated, once a product is replaced, the steel dies are eliminated, and the dies with new structures are additionally ordered, so the production cost is increased intangibly, and therefore, the development and design of the hot press molding dies with low maintenance cost and convenient replacement are the urgent problem in the field.
Disclosure of Invention
The invention aims to solve the technical problems of providing a car roof hot-press forming die, which adopts a laminated and bonded high-density board as a die body, and forms a die surface on the die surface of the die body through bonding glass fiber cloth, so that the car roof meets the material hot-press requirement, the glass fiber reinforced plastic has heat-resistant and wear-resistant properties, the die cost is greatly reduced, and meanwhile, the invention adopts a grid-shaped frame structure formed by welding steel plates as an upper die frame and a lower die frame, when a product is replaced, only the die body needs to be replaced, the grid-shaped frame structure can be reused, and is convenient to maintain and replace, and waste is avoided.
The invention also solves the technical problem of providing a car roof hot-press molding die molding method, which adopts a numerical control machine tool to mill a die convex surface and a die concave surface, improves the die precision, bonds a plurality of layers of glass fiber cloth on the processed die convex surface and concave surface, fully exerts the heat resistance and wear resistance of the glass fiber cloth, and prolongs the service life of the die.
In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a car ceiling hot briquetting mould, includes mould frame, last mould, lower mould frame and lower mould, and the profile of going up the mould is identical with the profile of lower mould, and the lower terminal surface of going up the mould frame is unsmooth cooperation with the up end of lower mould frame, and bonds the gap adjustment layer on the up end of lower mould frame, goes up mould with the help of bolt fixed mounting at the inboard lower extreme of last mould frame, and lower mould fixed mounting is at the inboard upper end of lower mould frame, go up two sets of hanging material nails of fixed mounting respectively at mould frame both ends, hanging material nail is used for the articulated combined material at hot briquetting in-process.
The upper die and the lower die comprise a die body and a surface layer, the die body is a laminated structure formed by bonding high-density boards, adjacent high-density boards are bonded by adopting white latex, the outer outline of the die surface is wrapped in the laminated structure formed by bonding, the upper surface or the lower surface of the laminated structure formed by bonding is processed in a numerical control mode to form the die surface, the surface layer is bonded on the die surface, and the surface layer comprises 6-11 layers of glass fiber cloth bonded on the die surface layer by adopting resin.
The upper die carrier and the lower die carrier are grid-shaped frame structures formed by welding steel plates, the upper die carrier and the lower die carrier comprise coamings and grid plates, the coamings are rectangular tubular structures formed by welding steel plates, the grid plates are welded on the inner sides of the coamings, the grid plates divide the inner sides of the coamings into rectangular grid-shaped frame structures, the lower end faces of the grid plates on the upper surface of the die body are attached, bonding materials are filled in the divided rectangular grids, anchor nails are welded on two sides of the grid plates, and the upper surface of the filled bonding materials is higher than the anchor nails.
The hanging nail comprises a spacing plate and two steel needles, wherein the spacing plate is welded on the upper outer end face, the two steel needles are vertically welded on the outer surface of the spacing plate, and the sharp ends of the steel needles are upwards.
The gap adjusting layer comprises PVC leather adhered to the upper end face of the lower die, and the PVC leather is arranged around the upper end face of the lower die.
In order to solve the technical problems, the invention also adopts the following technical scheme: a car roof hot-press molding die molding method comprises the following steps:
s1, bonding a high-density board to form a wood blank;
s2, milling a mold surface on the wood blank;
s3, grinding the molded surface of the mold;
s4, a molding surface of the paste mold comprises a convex surface and a concave surface of the paste mold;
s5, polishing the molded surface of the die;
s6, manufacturing a die carrier, wherein the manufacturing of the die carrier comprises manufacturing of an upper die carrier and a lower die carrier;
s7, installing an upper die and a lower die.
The step S1 comprises the step of laminating and bonding high-density boards by using white latex, wherein the high-density boards are fiber density boards, and the outline size of a wood blank formed by bonding is larger than that of a mold surface.
The step S2 comprises milling a convex surface and a concave surface of a die by a numerical control machine tool to form a die body, the step S3 comprises filling gaps of the die surface by gypsum, polishing the die surface by fine sand paper, forming a basic surface by coating a mixture of talcum powder and 107 glue, and finally forming an isolation layer by using a release agent and die wax.
And step S4, sticking three layers of fine glass fiber cloth on a die by using 902 resin, sticking three layers of middle fine glass fiber cloth by using 902 resin, sticking 5 layers of coarse glass fiber cloth, and polishing the molded surface by using a gauze wheel after the coated fine glass fiber cloth, middle glass fiber cloth and coarse glass fiber cloth are solidified to form the final die surface.
S5 includes that a grid-shaped frame structure is welded by using a steel plate, the lower end face of the grid-shaped frame structure is cut into an arc face similar to the profile of a die, a die body is fixedly connected with an upper die frame or a lower die frame by using bolts, adhesive is poured into a rectangular grid of the grid-shaped frame structure after the arc face is connected with the upper die frame or the lower die frame, the adhesive is used for adhering the upper surface or the lower surface of the die body, and the die body is connected with the upper die frame or the lower die frame into a whole after solidification.
The beneficial effects of adopting above-mentioned technical scheme to produce lie in: the high-density plate bonded in a laminated mode is adopted as the die body, the die surface is formed on the die surface of the die body through bonding glass fiber cloth, the requirement of a car roof on material hot pressing can be completely met, the glass fiber reinforced plastic has heat resistance and wear resistance, and the die cost is greatly reduced.
The technical scheme has the beneficial effects that: the numerical control machine tool is adopted to mill the convex surface and the concave surface of the die, the die precision is improved, the processed convex surface and concave surface of the die are bonded with a plurality of layers of glass fiber cloth, the heat resistance and wear resistance of the glass fiber cloth are fully exerted, and the service life of the die is prolonged.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of the structure of FIG. 1 in another direction;
FIG. 3 is a schematic diagram of the structure of the upper mold frame;
FIG. 4 is a schematic view of the bottom structure of FIG. 3;
wherein: 1. a die carrier is arranged; 2. lifting lugs; 3. hanging material nails; 4. an upper die; 5. a lower die frame; 6. and (5) lower die.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present invention is not limited to the specific embodiments disclosed below.
As shown in fig. 1-2, the invention discloses a car roof hot-press forming die, which comprises an upper die frame 1, an upper die 4, a lower die frame 5 and a lower die 6, wherein the molded surface of the upper die 4 is matched with the molded surface of the lower die, the lower end surface of the upper die frame 1 and the upper end surface of the lower die frame 5 are in concave-convex fit, a gap adjusting layer is adhered on the upper end surface of the lower die frame 5, the upper die 4 is fixedly arranged at the lower end of the inner side of the upper die frame 1 by means of bolts, the lower die 6 is fixedly arranged at the upper end of the inner side of the lower die frame 5, two sets of hanging nails 3 are respectively fixedly arranged at two ends of the upper die frame 1, and the hanging nails 3 are used for hanging composite materials in the hot-press forming process.
The upper die 4 and the lower die 6 comprise die bodies and surface layers, the die bodies are layered structures formed by bonding high-density boards, adjacent high-density boards are bonded by white latex, the outer outline of the die surface is wrapped in the layered structures formed by bonding, numerical control machining is conducted on the upper surface or the lower surface of the layered structures formed by bonding to form die surfaces, the surface layers are bonded on the die surfaces, and the surface layers comprise 6-11 layers of glass fiber cloth which are bonded on the die surfaces layer by resin.
Referring to fig. 3-4, the upper mold frame 1 and the lower mold frame 5 are respectively a grid-shaped frame structure formed by welding steel plates, the upper mold frame 1 and the lower mold frame 5 comprise a coaming and a grid plate, the coaming is a rectangular tubular structure formed by welding steel plates, the grid plate is welded on the inner side of the coaming, the inner side of the coaming is divided into a rectangular grid-shaped frame structure by the grid plate, the lower end face of the grid plate on the upper surface of the mold body is attached, the divided rectangular grid is filled with adhesive materials, anchor nails are welded on two sides of the grid plate, the upper surface of the filled adhesive materials are higher than the anchor nails, the adhesive materials are mixtures formed by mixing cement, broken stone, quartz sand, cast iron powder, quartz powder, resin and water, the main effects are that the mold body and the grid-shaped frame structure are adhered, and the upper surface of the mold body is attached to the lower end face of the grid-shaped frame structure by adopting a high-density plate, the mixture is focused in the grid-shaped frame structure, the upper surface of the mold body is attached to the mixture, the mixture is anchored by the anchor nails, the mold body and the grid-shaped frame structure is connected into an integral structure after the mixture is solidified, when the mold body needs to be replaced, the mixture needs to be replaced, the mold is only to be convenient to be smashed, and the mold is not wasted.
The hanging nail 3 comprises a spacing plate and two steel needles, the spacing plate is welded on the upper outer end face, the two steel needles are vertically welded on the outer surface of the spacing plate, and the pointed ends of the steel needles are upwards; the gap adjusting layer comprises PVC leather adhered to the upper end face of the lower die 6, the PVC leather is arranged around the upper end face of the lower die 6, and the upper die frame and the lower die frame are of steel structures and are in rigid contact in the hot press forming process, and the gap between the upper die and the lower die after being pressed is required to be adjusted according to the thickness of the composite material in the hot press forming process, so that the gap adjusting function is realized by adhering the PVC leather with certain elasticity on the upper end face of the lower die.
In the specific application process, the high-density plate which is bonded in a laminated way is adopted as the die body, the die surface is formed on the die surface of the die body through bonding the glass fiber cloth, the requirements of the car roof on material hot pressing can be completely met, the glass fiber reinforced plastic has heat resistance and wear resistance, the die cost is greatly reduced, meanwhile, the grid-shaped frame structure formed by welding steel plates is adopted as the upper die frame and the lower die frame, when the product is replaced, only the die body is required to be replaced, the grid-shaped frame structure can be reused, the maintenance and the replacement are convenient, and the waste is avoided.
The invention also discloses a molding method of the car roof hot-press molding die, which is characterized in that: the method comprises the following steps:
s1, bonding a high-density board to form a wood blank; the step S1 comprises the steps of laminating and bonding high-density boards by using white latex, wherein the high-density boards are fiber density boards, and the outline size of a wood blank formed by bonding is larger than that of a mold surface;
s2, milling a mold surface on the wood blank;
s3, grinding the molded surface of the mold; the step S2 comprises milling a convex surface and a concave surface of a die by a numerical control machine tool to form a die body, the step S3 comprises filling gaps of the die surface by gypsum, polishing the die surface by fine sand paper, forming a basic surface by coating a mixture of talcum powder and 107 glue, and finally forming an isolation layer by using a release agent and die wax.
S4, a molding surface of the paste mold comprises a convex surface and a concave surface of the paste mold;
s5, polishing the molded surface of the die; and step S4, sticking three layers of fine glass fiber cloth on a die by using 902 resin, sticking three layers of middle fine glass fiber cloth by using 902 resin, sticking 5 layers of coarse glass fiber cloth, and polishing the molded surface by using a gauze wheel after the coated fine glass fiber cloth, middle glass fiber cloth and coarse glass fiber cloth are solidified to form the final die surface.
S6, manufacturing a die carrier, wherein the manufacturing of the die carrier comprises manufacturing of an upper die carrier and a lower die carrier;
s7, installing an upper die and a lower die.
S5 includes that a grid-shaped frame structure is welded by using a steel plate, the lower end face of the grid-shaped frame structure is cut into an arc face similar to the profile of a die, a die body is fixedly connected with an upper die frame or a lower die frame by using bolts, adhesive is poured into a rectangular grid of the grid-shaped frame structure after the arc face is connected with the upper die frame or the lower die frame, the adhesive is used for adhering the upper surface or the lower surface of the die body, and the die body is connected with the upper die frame or the lower die frame into a whole after solidification.
In the specific application process, the numerical control machine tool is adopted to mill the convex surface and the concave surface of the die, the die precision is improved, the processed convex surface and concave surface of the die are bonded with a plurality of layers of glass fiber cloth, the heat resistance and wear resistance of the glass fiber cloth are fully exerted, and the service life of the die is prolonged.
Claims (8)
1. The utility model provides a car roof hot briquetting mould which characterized in that: the hot press forming device comprises an upper die frame (1), an upper die (4), a lower die frame (5) and a lower die (6), wherein the molded surface of the upper die frame (4) is matched with the molded surface of the lower die, the lower end surface of the upper die frame (1) is in concave-convex fit with the upper end surface of the lower die frame (5), a gap adjusting layer is adhered to the upper end surface of the lower die frame (5), the upper die (4) is fixedly arranged at the lower end of the inner side of the upper die frame (1) by means of bolts, the lower die (6) is fixedly arranged at the upper end of the inner side of the lower die frame (5), two sets of hanging nails (3) are respectively fixedly arranged at the two ends of the upper die frame (1), and the hanging nails (3) are used for hanging composite materials in the hot press forming process;
the upper die (4) and the lower die (6) both comprise a die body and a surface layer, the die body is of a layered structure formed by bonding high-density boards, adjacent high-density boards are bonded by adopting white latex, the outer outline of the die surface is wrapped in the layered structure formed by bonding, the upper surface or the lower surface of the layered structure formed by bonding is processed in a numerical control manner to form a die surface, the surface layer is bonded on the die surface, the surface layer comprises 902 resin, three layers of fine glass fiber cloth are bonded on the die surface, then 902 resin is used for bonding three layers of fine glass fiber cloth, and then 5 layers of coarse glass fiber cloth are bonded;
the upper die carrier (1) and the lower die carrier (5) are grid-shaped frame structures formed by welding steel plates, the grid-shaped frame structures comprise coamings and grid plates, the coamings are rectangular tubular structures formed by welding steel plates, the grid plates are welded on the inner sides of the coamings, the grid plates divide the inner sides of the coamings into rectangular grid-shaped frame structures, the lower end faces of the grid plates on the upper surface of the die body are attached, adhesive materials are filled in the divided rectangular grids, anchor nails are welded on two sides of the grid plates, and the upper surface of the filled adhesive materials is higher than the anchor nails.
2. The car roof thermo-compression molding die according to claim 1, wherein: the hanging nail (3) comprises a spacing plate and two steel needles, the spacing plate is welded on the upper outer end face, the two steel needles are vertically welded on the outer surface of the spacing plate, and the sharp ends of the steel needles are upwards.
3. The car roof thermo-compression molding die according to claim 2, wherein: the gap adjusting layer comprises PVC leather adhered to the upper end face of the lower die (6), and the PVC leather is arranged around the upper end face of the lower die (6).
4. A car roof hot press molding die molding method as set forth in any one of claims 1 to 3, characterized in that: the method comprises the following steps:
s1, bonding a high-density board to form a wood blank;
s2, milling a mold surface on the wood blank;
s3, grinding the molded surface of the mold;
s4, a molding surface of the paste mold comprises a convex surface and a concave surface of the paste mold;
s5, polishing the molded surface of the die;
s6, manufacturing a die carrier, wherein the manufacturing of the die carrier comprises manufacturing of an upper die carrier and a lower die carrier;
s7, installing an upper die and a lower die.
5. The car roof hot press molding die molding method according to claim 4, wherein: the step S1 comprises the step of laminating and bonding high-density boards by using white latex, wherein the high-density boards are fiber density boards, and the outline size of a wood blank formed by bonding is larger than that of a mold surface.
6. The car roof hot press molding die molding method according to claim 4, wherein: the step S2 comprises milling a convex surface and a concave surface of a die by a numerical control machine tool to form a die body, the step S3 comprises filling gaps of the die surface by gypsum, polishing the die surface by fine sand paper, forming a basic surface by coating a mixture of talcum powder and 107 glue, and finally forming an isolation layer by using a release agent and die wax.
7. The car roof hot press molding die molding method according to claim 4, wherein: and step S4, sticking three layers of fine glass fiber cloth on a die by using 902 resin, sticking three layers of middle fine glass fiber cloth by using 902 resin, sticking 5 layers of coarse glass fiber cloth, and polishing the molded surface by using a gauze wheel after the coated fine glass fiber cloth, middle glass fiber cloth and coarse glass fiber cloth are solidified to form the final die surface.
8. The car roof hot press molding die molding method according to claim 4, wherein: the step S5 comprises the steps of welding a grid-shaped frame structure by using a steel plate, cutting the lower end face of the grid-shaped frame structure into an arc face similar to the profile of a die, fixedly connecting a die body with an upper die frame or a lower die frame by using bolts, pouring adhesive into a rectangular grid of the grid-shaped frame structure after connection, and bonding the upper surface or the lower surface of the die body by using the adhesive, wherein the die body and the upper die frame or the lower die frame are connected into a whole after solidification.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710576466.XA CN107139439B (en) | 2017-07-14 | 2017-07-14 | Car roof hot-press forming die and forming method thereof |
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| CN201710576466.XA CN107139439B (en) | 2017-07-14 | 2017-07-14 | Car roof hot-press forming die and forming method thereof |
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| CN107139439A CN107139439A (en) | 2017-09-08 |
| CN107139439B true CN107139439B (en) | 2023-05-30 |
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