CN101708642B - Process for manufacturing and molding double-layer plastic vehicle body - Google Patents
Process for manufacturing and molding double-layer plastic vehicle body Download PDFInfo
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- CN101708642B CN101708642B CN2009101576972A CN200910157697A CN101708642B CN 101708642 B CN101708642 B CN 101708642B CN 2009101576972 A CN2009101576972 A CN 2009101576972A CN 200910157697 A CN200910157697 A CN 200910157697A CN 101708642 B CN101708642 B CN 101708642B
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Abstract
The invention relates to a process for manufacturing and molding a double-layer plastic vehicle body, which comprises the following steps: (1) according to the profile of the vehicle body, manufacturing a concave die and a convex die respectively, and arranging outer edges on the bottoms of the concave die and the convex die respectively; (2) adding a plastic raw material into the concave die or the convex die, locking the concave die and the convex die through the outer edges on the bottoms thereof, performing heating, rotation, cooling and other steps, rotationally molding to form a hollow plastic vehicle body shell, and positioning the hollow plastic vehicle body shell in a shaping mould for shaping; and (3) foaming a hollow part of the hollow plastic vehicle body shell to form a middle foam plastic layer. The process adopts rotational molding to integrally shape the vehicle body shell, which can reduce the working procedures and simplify the process on one hand and makes the mould have simple structure, convenient processing and low manufacturing cost on the other hand; and meanwhile, a vehicle body product has the advantages of even wall thickness, no joint, difficult deformation and the like.
Description
Technical field:
The body shell system that the present invention relates to various motor vehicles such as automobile, electric vehicle is made technology, particularly a kind of making moulding process of double-layer plastic vehicle body.
Background technology:
The disclosed a kind of plastic body structure of car of China utility model patent ZL01142849.X, combining the car body component that forms with shell by skeleton connects to form, wherein metallic framework constitutes the inner support of car body component, the shell of car body component is to merge the sandwich component that forms by sheet, outer plate in the rigid plastics, leave sufficient space in the sandwich component, in inner support is included in, and in the space of sandwich component filling foamed plastics, again that monolithic case is fixed-type, constitute car body component.The shortcoming of this structure is: 1, sheet and outer plate will be made respectively of large size plastic jetting-moulding device and mould in the plastics, are fixed together after packaging the aluminium alloy inner support then to form sandwich component again, and operation is various, complex manufacturing technology.When 2, making with Shooting Technique, owing to need bear high pressure, thereby mould is heavy and complicated, the manufacturing cost height, and Shooting Technique also makes the interior sheet of the plastics that mold easily and the outer plate wall unevenness is even and the surface produces seam etc.3, suit aluminium alloy inner support between sheet and the outer plate in plastics, though guarantee the intensity of body shell body, also greatly increase raw-material cost.
Summary of the invention:
The objective of the invention is to overcome above-mentioned the deficiencies in the prior art, a kind of making moulding process that comes the double-layer plastic vehicle body of global formation body shell with rotational moulding is provided, it has simplified manufacture craft and mould structure, has reduced manufacturing cost etc.
In order to realize the foregoing invention purpose, the present invention has adopted following technical scheme:
A kind of making moulding process of double-layer plastic vehicle body is characterized in that comprising the steps:
(1) makes mould: make a die and punch respectively by body outline, and the outer is set respectively in the bottom of die and punch;
(2) rotational moulding goes out the plastic body cover shell of hollow in mould:
A, reinforced: pulverous plastic raw materials is added between die and the punch, and the outer, bottom of die and punch is fixed together forms whole Plastic Rolling Molds then;
B, heating: change over to Plastic Rolling Molds in the heating clamber and make it and constantly rotate, heat along orthogonal main shaft and countershaft, the condition during heating is: wind-heat, 310～350 ℃ of temperature, 25～30 minutes time; Plastic raw materials in the mould is under the effect of gravity and heat energy, and way cloth, fusion adhere on the whole surface of die cavity equably gradually, thereby forms the plastic body cover shell of a hollow in Plastic Rolling Molds;
C, cooling: Plastic Rolling Molds changed in the cooling chamber cool off, keep main shaft and countershaft to rotate during cooling, the condition during cooling is: air-flow cools off, time 50～60min;
D, the demoulding: the demoulding in the Plastic Rolling Molds of the hollow plastic body shell of moulding is taken out;
E, typing: place the shaper that adapts with its shape to finalize the design by applying certain load the hollow plastic body shell, the load that applies during described the typing is 4～8MPa, and shaping time is 6～10h;
(3) in the hollow plastic body shell, foam: fix the hollow plastic body shell with wooden model, liquid state or flow-like foamed plastics are injected the hollow space of hollow plastic body shell, foamed plastics solidify the back form in the middle of foam layer and become integral body with hollow plastic body shell inner surface is bonding.
Be provided with the reinforcement profiled sheeting between described die and the punch.
The plastic raw materials that adopts during rotational moulding is a rigid plastics.
Described when reinforced, the adding weight of Powdered plastics is greater than 4%～6% of vehicle body product weight.
The present invention has following advantage with respect to prior art after adopting technique scheme:
First, the present invention comes global formation to go out the plastic casing of hollow by adopt rotational molding technique in the Plastic Rolling Molds of hollow, be about to sheet and outer plate integral one-step molding in the plastics of the prior art, can reduce operation on the one hand, simplify technology, it is easy to make body shell make moulding, on the other hand because Plastic Rolling Molds is not born high pressure, do not need very high intensity, so it is simple in structure, easy to process, fabrication cycle is short, cost is low.
The second, adopt rotational molding technique to make moulding, can make the body shell wall thickness made evenly, no seam, and goods do not have residual stress, are difficult for deforming.
The 3rd, the body shell of rotation molding has the distortion restorability, when vehicle body produces distortion being collided, does not need can restore voluntarily by external force by local heat.
The 4th, raw material is directly added in the mould during rotational moulding at every turn, moulding finishes and adds next needed raw material again after taking out goods, the therefore waste material that does not have runner, cast gate etc. to locate, thereby waste material neither, also not needing expends time in clears up passion and mould.
The 5th, be provided with polylith reinforcement profiled sheeting in the Plastic Rolling Molds, make in the body shell of making after the moulding to have the many places reinforcing rib structure, thereby can guarantee the intensity of body shell, owing to saved the aluminium alloy inner support, therefore also aspect raw material, reduced cost simultaneously.
Description of drawings:
Fig. 1 is the structural representation of Plastic Rolling Molds among the present invention.
Fig. 2 is the structural representation of the double-layer plastic vehicle body of making moulding.
The specific embodiment:
Referring to Fig. 1 and Fig. 2, be example with the automobile, the making moulding process according to double-layer plastic vehicle body provided by the invention comprises the steps:
(1) makes mould: make a die 1 and punch 2 respectively by the body of a motor car profile, and outer 11,21 is set respectively in the bottom of die 1 and punch 2;
(2) rotational moulding goes out the plastic body cover shell of hollow in mould:
A, reinforced: pulverous plastic raw materials is added between die 1 and the punch 2, and formation whole Plastic Rolling Molds 3 then is fixed together the outer, bottom 11,21 of die and punch;
B, heating: change over to Plastic Rolling Molds in the heating clamber and make it and constantly rotate, heat along orthogonal main shaft and countershaft, the condition during heating is: wind-heat, 310～350 ℃ of temperature, 25～30 minutes time; Plastic raw materials in the mould is under the effect of gravity and heat energy, and way cloth, fusion adhere on the whole surface of die cavity equably gradually, thereby forms the plastic body cover shell 4 of a hollow in Plastic Rolling Molds 3;
C, cooling: Plastic Rolling Molds 3 changed in the cooling chamber cool off, keep main shaft and countershaft to rotate during cooling, the condition during cooling is: air-flow cools off, time 50～60min;
D, the demoulding: the hollow plastic body shell 4 of moulding is taken out from the Plastic Rolling Molds 3 interior demouldings;
E, typing: place the shaper that adapts with its shape to finalize the design by applying certain load hollow plastic body shell 4, the load that applies during described the typing is 4～8MPa, and shaping time is 6～10h;
(3) foaming in hollow plastic body shell 4: fix hollow plastic body shell 4 with wooden model, liquid state or flow-like foamed plastics are injected the hollow space of hollow plastic body shell 4, foamed plastics solidify the back form in the middle of foam layer 5 and become integral body with hollow plastic body shell inner surface is bonding.
As mentioned above, also be provided with reinforcement profiled sheeting 6 between described die 1 and the punch 2, thereby make the hollow space of the body shell 4 after the making moulding have many places reinforcing rib structure 7, as shown in Figure 2, reinforcement 7 adopts kiss formula structure, can save material so on the one hand, on the other hand can more effective raising bus body strength.
The plastic raw materials that adopts during rotational moulding is a rigid plastics, for example, adopts HDPE, LDPE or LLDPE, is hard plastic layer thereby make the body shell that is wrapped in middle foam layer 5 peripheries, to increase the rigidity of vehicle body.
Described when reinforced, the adding weight of Powdered plastics can remedy the processing loss of plastic raw materials in rotation heating process like this greater than 4%～6% of vehicle body product weight, makes the body shell weight after the moulding reach pre-provisioning request.
The foregoing description is only for the usefulness that the present invention is described; and be not limitation of the present invention; the those of ordinary skill in relevant technologies field; under the situation that does not break away from the spirit and scope of the present invention; can also make various variations and modification; therefore all technical schemes that are equal to also belong to category of the present invention, and scope of patent protection of the present invention should be limited by each claim.
Claims (4)
1. the making moulding process of a double-layer plastic vehicle body is characterized in that comprising the steps:
(1) makes mould: make a die and punch respectively by body outline, and the outer is set respectively in the bottom of die and punch;
(2) rotational moulding goes out the plastic body cover shell of hollow in mould:
A, reinforced: pulverous plastic raw materials is added between die and the punch, and the outer, bottom of die and punch is fixed together forms whole Plastic Rolling Molds then;
B, heating: change over to Plastic Rolling Molds in the heating clamber and make it and constantly rotate, heat along orthogonal main shaft and countershaft, the condition during heating is: wind-heat, 310～350 ℃ of temperature, 25～30 minutes time; Plastic raw materials in the mould is under the effect of gravity and heat energy, and way cloth, fusion adhere on the whole surface of die cavity equably gradually, thereby forms the plastic body cover shell of a hollow in Plastic Rolling Molds;
C, cooling: Plastic Rolling Molds changed in the cooling chamber cool off, keep main shaft and countershaft to rotate during cooling, the condition during cooling is: air-flow cools off, time 50～60min;
D, the demoulding: the demoulding in the Plastic Rolling Molds of the hollow plastic body shell of moulding is taken out;
E, typing: place the shaper that adapts with its shape to finalize the design by applying certain load the hollow plastic body shell, the load that applies during described the typing is 4～8MPa, and shaping time is 6～10h;
(3) in the hollow plastic body shell, foam: fix the hollow plastic body shell with wooden model, liquid state or flow-like foamed plastics are injected the hollow space of hollow plastic body shell, foamed plastics solidify the back form in the middle of foam layer and become integral body with hollow plastic body shell inner surface is bonding.
2. the making moulding process of double-layer plastic vehicle body as claimed in claim 1 is characterized in that: be provided with the reinforcement profiled sheeting between described die and the punch.
3. the making moulding process of double-layer plastic vehicle body as claimed in claim 1 or 2, it is characterized in that: the plastic raw materials that adopts during rotational moulding is a rigid plastics.
4. the making moulding process of double-layer plastic vehicle body as claimed in claim 1 or 2 is characterized in that: described when reinforced, the adding weight of Powdered plastics is greater than 4%～6% of vehicle body product weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101576972A CN101708642B (en) | 2009-07-24 | 2009-07-24 | Process for manufacturing and molding double-layer plastic vehicle body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101576972A CN101708642B (en) | 2009-07-24 | 2009-07-24 | Process for manufacturing and molding double-layer plastic vehicle body |
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| Publication Number | Publication Date |
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| CN101708642A CN101708642A (en) | 2010-05-19 |
| CN101708642B true CN101708642B (en) | 2011-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009101576972A Expired - Fee Related CN101708642B (en) | 2009-07-24 | 2009-07-24 | Process for manufacturing and molding double-layer plastic vehicle body |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102729383B (en) * | 2011-04-12 | 2016-01-13 | 应革 | The one-shot forming technique of double-layer plastic vehicle shell |
| CN102179671B (en) * | 2011-04-15 | 2012-10-10 | 湖北三江航天万峰科技发展有限公司 | Making method of large-scale cavity foaming part molding die and die structure thereof |
| CN102320125A (en) * | 2011-06-09 | 2012-01-18 | 应革 | Method for shaping automobile shell in one step |
| CN103192480A (en) * | 2012-01-05 | 2013-07-10 | 应革 | One-time forming process of plastic vehicle body with built-in steel net and aluminum frame |
| CN103192479B (en) * | 2012-01-05 | 2016-05-25 | 应革 | One-shot forming is the method at interior plastics car housing containing chassis |
| BE1020382A5 (en) * | 2012-04-30 | 2013-08-06 | Plastigi | DEVICE AND METHOD FOR ROTATION CASTING OF PLASTIC. |
| CN103978600B (en) * | 2013-02-07 | 2016-06-08 | 应革 | Automatic die sinking one-shot forming rotational molding car body die |
| CN113787748A (en) * | 2021-09-22 | 2021-12-14 | 富士房车（江苏）有限公司 | Car as a house automobile body integrated molding method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2034938U (en) * | 1988-04-27 | 1989-03-29 | 陈世杰 | All-plastic motor vehicle hood |
| CN1063838A (en) * | 1991-01-29 | 1992-08-26 | 张基 | Large-sized special-shaped hollow plastic product production technology and equipment |
| CN201006728Y (en) * | 2006-12-30 | 2008-01-16 | 浙江吉利汽车研究院有限公司 | Passenger vehicle body |
-
2009
- 2009-07-24 CN CN2009101576972A patent/CN101708642B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2034938U (en) * | 1988-04-27 | 1989-03-29 | 陈世杰 | All-plastic motor vehicle hood |
| CN1063838A (en) * | 1991-01-29 | 1992-08-26 | 张基 | Large-sized special-shaped hollow plastic product production technology and equipment |
| CN201006728Y (en) * | 2006-12-30 | 2008-01-16 | 浙江吉利汽车研究院有限公司 | Passenger vehicle body |
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| CN101708642A (en) | 2010-05-19 |
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Application publication date: 20100519 Assignee: YINGKANG JIADINUO AUTO ACCESSORIES CO., LTD. Assignor: Ying Ge Contract record no.: 2014330000141 Denomination of invention: Process for manufacturing and molding double-layer plastic vehicle body Granted publication date: 20111207 License type: Exclusive License Record date: 20140509 |
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