CN111016385B - Method for wrapping spare tire cover plate of automobile trunk - Google Patents
Method for wrapping spare tire cover plate of automobile trunk Download PDFInfo
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- CN111016385B CN111016385B CN201911251173.XA CN201911251173A CN111016385B CN 111016385 B CN111016385 B CN 111016385B CN 201911251173 A CN201911251173 A CN 201911251173A CN 111016385 B CN111016385 B CN 111016385B
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 239000000463 material Substances 0.000 claims abstract description 36
- 230000001413 cellular effect Effects 0.000 claims abstract description 24
- 239000004744 fabric Substances 0.000 claims abstract description 23
- 238000010438 heat treatment Methods 0.000 claims abstract description 20
- 238000002844 melting Methods 0.000 claims abstract description 15
- 230000008018 melting Effects 0.000 claims abstract description 15
- 238000003825 pressing Methods 0.000 claims abstract description 15
- 239000002699 waste material Substances 0.000 claims abstract description 10
- 239000004743 Polypropylene Substances 0.000 claims description 55
- 239000003365 glass fiber Substances 0.000 claims description 17
- 239000011162 core material Substances 0.000 claims description 14
- 238000009957 hemming Methods 0.000 claims description 14
- 230000008569 process Effects 0.000 claims description 13
- 238000010008 shearing Methods 0.000 claims description 8
- -1 polypropylene Polymers 0.000 claims description 6
- 229920001155 polypropylene Polymers 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 3
- 239000002657 fibrous material Substances 0.000 claims description 3
- 238000010030 laminating Methods 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 abstract description 14
- 230000001070 adhesive effect Effects 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 11
- 238000005520 cutting process Methods 0.000 abstract description 8
- 239000012943 hotmelt Substances 0.000 abstract description 3
- 210000003491 skin Anatomy 0.000 description 31
- 239000000047 product Substances 0.000 description 13
- 238000007789 sealing Methods 0.000 description 6
- 230000007306 turnover Effects 0.000 description 6
- 210000002615 epidermis Anatomy 0.000 description 4
- 229920005830 Polyurethane Foam Polymers 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011496 polyurethane foam Substances 0.000 description 2
- 239000004831 Hot glue Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000012768 molten material Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/0004—Cutting, tearing or severing, e.g. bursting; Cutter details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/0012—Mechanical treatment, e.g. roughening, deforming, stretching
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
The invention relates to a method for wrapping a spare tire cover plate of an automobile trunk, and belongs to the technical field of automobile part processing. In order to solve the problems of poor bonding force and large pollution of the existing cover plate adopting an adhesive, the method for wrapping the spare tire cover plate of the automobile trunk comprises the steps of heating and melting the outer surface of the lower surface of a base material PP cellular board, and then covering and bonding a surface fabric and the base material PP cellular board to obtain a corresponding cover plate; and putting the honeycomb panel into a die cavity, heating the hot cutter, pressing down, heating and melting, continuously pressing down to the outer side of the hot cutter to touch the surface of the lower die frame, cutting off the redundant waste area, reserving a corresponding turned edge, continuously pressing down the middle area of the corresponding cover plate through the upper floating module, standing the corresponding area of the turned edge to be bonded with the corresponding side surface of the PP honeycomb panel, finishing edge covering, and taking out a corresponding product. The invention avoids adopting adhesive to bond, effectively reduces VOC pollution, and has good bonding force effect in hot melt bonding.
Description
Technical Field
The invention relates to a method for wrapping a spare tire cover plate of an automobile trunk, and belongs to the technical field of automobile part processing.
Background
In the past, most of luggage compartment carpet base materials of mainstream vehicle types in the market use PHC plates, the upper surface and the lower surface of the material structure are polyurethane foams, glass fibers are added in the polyurethane foams, the middle layer is a paper honeycomb, the VOC and odor of the material are poor, the requirements of national regulations and various major host factories are difficult to meet, in order to solve the problem that the odor and the VOC of the PHC plates are poor, the main trend is to replace the PHC plates into PP glass fiber reinforced honeycomb plates with similar mechanical properties, but most of luggage compartment carpet products manufactured by using the PP glass fiber reinforced honeycomb plate base materials in the market use glue for edge sealing, and a small part of the luggage compartment carpet products also use tooling (similar to molds) for edge sealing (hereinafter collectively referred to as mechanical edge sealing), but the mechanical edge sealing is not ideal enough, and the appearance has defects; meanwhile, the edge sealing of the product needs to be performed with a base material in advance, for example, the upper surface of the PP glass fiber reinforced honeycomb board base material is pretreated to ensure that the skin of the upper surface is consistent with the outline of the product, and the skin of the lower surface is provided with an edge sealing area outside the outline of the product as shown in FIG. 3. Meanwhile, after the boundary is turned over, the lower surface skin needs to be turned over inwards to the upper surface of the plastic honeycomb sandwich panel, as shown in fig. 4, the method is not suitable for large-scale industrial production and poor in consistency, and the phenomena of edge opening, material overflow and the like can occur after the edge is turned over, and a manual trimming process needs to be added.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the method for wrapping the spare wheel cover plate of the automobile trunk, which solves the problems of how to improve the simplified operation, realize non-adhesive compounding, reduce VOC pollution and have high wrapping combining force.
The invention aims to realize the following technical scheme, and the method for wrapping the spare tire cover plate of the automobile trunk comprises the following steps of:
A. heating and melting the outer surface of the lower skin of the base material PP cellular board to be sticky, and then laminating and bonding the surface fabric and the base material PP cellular board to obtain a corresponding semi-finished cover plate;
B. placing the obtained semi-finished cover plate into a die cavity of a corresponding die, heating a hot cutter of an upper die frame of the die in a corresponding edge covering area, and controlling the upper die frame to press downwards so that the hot cutter heats and melts the upper surface of the honeycomb plate and the honeycomb core of the base material PP, and then continuously pressing downwards until the outer side of the hot cutter touches the surface of a lower die frame of the die to cut off redundant waste material areas on the outer side, and a corresponding lower area of the cover plate can be reserved below the hot cutter to be used as a corresponding turned edge;
C. and continuously pressing the middle area of the corresponding semi-finished cover plate downwards through an upper floating module of the upper die frame, and simultaneously moving a lower floating module on the lower die frame downwards to enable the corresponding area of the turned edge to stand up to be bonded with the corresponding side surface of the semi-finished cover plate, curing, finishing edge covering, and taking out a corresponding finished product.
The lower outer surface of the PP honeycomb plate is melted in a heating mode to form a sticky state, namely the PP honeycomb plate is melted under heating to have adhesiveness, and then the surface fabric is directly adhered and covered with the PP honeycomb plate, so that the problem of VOC pollution caused by the adhesive is effectively solved by adopting an adhesive bonding mode; meanwhile, in the edge covering process, not only the waste material area is cut off by simple hot cutting, but more importantly, the invention does not simply cut off the excessive waste material on the outer side, but part of viscous fluid formed by heating and melting the upper skin and the honeycomb core of the honeycomb plate in the edge covering area by the hot cutting knife can flow to the gap part of the honeycomb core of the honeycomb plate on the side part, so that the adhesive force on the side surface is effectively improved, the whole distribution is more uniform, the outer side part is directly cut off under the action of the cutting knife after flowing to the waste material area, the reserved lower part area of the cover plate is used as the surface of the lower skin of the corresponding flanging area to be viscous, then the corresponding areas of the flanging on the two sides are effectively adhered to the side surface of the PP honeycomb plate after the upper floating module of the die is pressed down, so that the effect of high adhesive force is achieved, and the adhesion covering is directly carried out in a melting mode, so that the adhesion of glue is avoided, the VOC pollution is effectively reduced, the product quality is better improved, and meanwhile, the operation process is simplified through hot melt adhesion, and the practical application is facilitated.
In the method for wrapping the spare tire cover plate of the automobile trunk, preferably, the lower surface of the hot cutter corresponding to the flanging area in the step B is planar, and the surface of the hot cutter corresponding to the flanging area can be attached to the surface of the corresponding flanging area in a planar manner. The invention has the advantages that the upper material corresponding to the edge covering area is melted and bonded on the side surface, and the flat characteristic is adopted, so that after the hot cutter is pressed down and melted, the surface melting viscosity of the lower surface skin corresponding to the turnover area can be better uniform and flat, the uniformity of each position of subsequent bonding is ensured, meanwhile, the flat shape is formed, the smoothness of the melting surface of the lower surface skin is ensured during pressing down, the uniformity of the thickness during edge covering is realized, the uniformity of the flatness is high, the bonding is more sufficient when the lower surface skin is vertically bonded on the side surface of the PP honeycomb panel, and the bonding force of the bonding is improved; the inner side of the hot cutter is preferably right-angled, so that the molten material can be prevented from overflowing from the edge of the notch above the hot cutter during edge covering, and the quality of edge covering is ensured.
In the method for wrapping the spare tire cover plate of the automobile trunk, preferably, in the pressing process in the step C, a right-angled shearing blade is formed between the upper floating module and the lower die frame. The upper floating pressure block of the upper die and the lower die frame can be enabled to be smaller in fit clearance, a shearing edge is formed, the edge of the side face formed by the turnover area is enabled to be smoother, the flatness formed by the upper edge of the corresponding turnover area and the surface of the upper skin of the PP cellular board can be guaranteed to be higher when the upper edge of the turnover area and the surface of the upper skin of the PP cellular board are erected, flash is effectively avoided, the phenomenon of unevenness of the surface bonding part is better avoided, and the quality of edge covering is improved. As a further preference, the angle formed between the upper surface of the lower mold frame and the corresponding side surface of the lower mold frame on the side close to the cavity is a right angle. When the upper die is pressed down, a direct shearing effect is formed between the upper floating module of the upper die and the lower die frame, and the quality of edge covering is improved.
In the method for wrapping the spare tire cover plate of the automobile trunk, preferably, the die cavity gap between the upper floating module and the lower floating module in the step C is T + 1/3T;
wherein T is the distance between the edge of the turned edge and the side face of the semi-finished product, and T is the thickness of the surface fabric. The cavity gap of the mold is equivalent to the thickness of a product placed in the mold, namely the height distance between the upper floating module and the lower floating module, and the conventional cavity gap in the field is designed according to the processing size of the product, so that the cavity gap is within the error required by the size precision of the product. However, the invention designs the die cavity gap by adopting the calculation formula according to the size of the edge covering area and the thickness of the surface fabric, and the improved die cavity gap requirement is designed by considering the influence of the flowing melt on the product in the process of hot melt bonding and the problem of overflow prevention, so that the phenomenon of overhigh or overlow during edge covering is effectively avoided, the overflow phenomenon is better avoided, and the effectiveness and the surface smoothness of the edge covering are improved.
In the method for hemming the spare tire cover of the automobile trunk, the thickness of the turned edge adhered to the side surface in the step C is 1/3t + (A)1+A2). Wherein t is the thickness of the surface fabric, A1Is the lower skin thickness of PP honeycomb plate, A2The thickness of the upper skin of the PP honeycomb plate is shown. The whole thickness of the melted adhesive part can be better ensured, and enough adhesive force is provided, so that the formed edge cover has better thickness requirement, and the adhesive force is better ensured.
In the method for wrapping the spare tire cover plate of the automobile trunk, preferably, the upper surface skin and the lower surface skin of the PP cellular board are both made of a polypropylene and glass fiber mixed material; the core material of the honeycomb core of the PP honeycomb plate is made of polypropylene material. Through the better adhesive capacity that can form after the heating and melting, simultaneously, make top epidermis and bottom epidermis have certain glass fiber, improve its intensity, and under the molten condition, under glass fiber's effect, the binding force of tangent plane when can make the side bonding of flanging edge and PP honeycomb panel is better, avoids appearing the dropout phenomenon. As a further preference, the content of the glass fiber in the upper surface skin is 10 wt% -15 wt%, and the length of the glass fiber is 40mm-60mm short fiber. The glass fiber has a certain length and can be better distributed on a bonding interface of a bonding part to form internal bonding force.
In the method for wrapping the spare tire cover plate of the automobile trunk, preferably, the surface fabric in the step A is made of a polyester fiber material.
In summary, compared with the prior art, the invention has the following advantages:
1. the surface fabric is bonded with the PP cellular board by completely adopting a heating and melting mode, and meanwhile, the materials in the edge covering area are subjected to heating and melting bonding treatment during edge covering, so that the edge covering bonding effect is effectively realized, the bonding by adopting an adhesive is avoided, the VOC pollution is effectively reduced, and the edge covering rear surface has good smoothness and strong bonding force.
2. By adopting the mode that the hot cutter can be attached to the lower surface of the PP cellular board of the base material in a plane shape corresponding to the flanging area, the surface of the lower surface skin corresponding to the flanging area can be melted uniformly, the uniformity of each position of subsequent bonding is ensured, the uniformity of thickness is favorably realized during edge covering, the uniformity of flatness is favorable, the bonding is more sufficient when the lower surface skin is vertically bonded to the side surface of the PP cellular board, and the bonding force of the bonding is improved; and the overflow of the melt from the edge of the notch above the edge can be avoided during edge covering, so that the quality of the edge covering is ensured.
3. A right-angle shearing cutting edge can be formed between the upper floating pressing block and the lower die frame when the lower die frame is pressed down. The flatness formed by the upper edge of the corresponding turnover area and the surface of the upper skin of the PP cellular board can be guaranteed to be higher when the PP cellular board stands, flash is effectively avoided, the phenomenon that the surface bonding part is uneven is better avoided, and the quality of edge covering is improved.
Drawings
Fig. 1 is a schematic structural view of a cover plate which is not wrapped after a PP honeycomb plate and a surface fabric are hot-melted and laminated according to the present invention.
Fig. 2 is a schematic structural view of the PP honeycomb panel of the present invention when it is not placed in the cavity of the mold.
Fig. 3 is a schematic view of the process of placing the cover plate of the present invention into the cavity of a mold.
Fig. 4 is a schematic view of the process of the present invention when the hot knife performs the cutting of the waste material.
Fig. 5 is a schematic view of the hemming process of the present invention after the upper floating module is pressed down.
Fig. 6 is an overall view of the present invention after hemming is completed.
Fig. 7 is a schematic illustration of the corresponding thickness of the cover plate of the present invention.
In the figure, 1, PP honeycomb plate; 11. an upper epidermis; 12. a lower epidermis; 13. a honeycomb core; 2. surface fabric; 3. feeding a mold frame; 4. a hot cutter; 5. an upper floating module; 6. a lower die frame; 61. the upper surface of the lower die carrier; 62. the side surface of the lower die frame; 7. and a lower floating module.
Detailed Description
The technical solutions of the present invention will be further specifically described below with reference to specific examples and drawings, but the present invention is not limited to these examples.
In order to more clearly show the hemming method of the invention, the hemming method of the spare tire cover plate of the automobile trunk is combined with the following steps of (1) to (6): the method comprises the steps of selecting a proper base material PP cellular board 1 and a surface fabric 2 according to the size of a spare tire cover plate of an automobile trunk, wherein the base material PP cellular board 1 comprises an upper surface skin 11 on an upper layer, a lower surface skin 12 on a lower layer and a cellular core 13 on a middle layer, heating the outer surface of the lower surface skin 12 of the base material PP cellular board 1 to be in a sticky state, namely heating to be in a molten state to be in a good viscosity, heating to be in a molten state to be in a certain viscosity after the material is softened by heating, and then laminating and bonding the surface fabric 2 and the lower surface skin 12 of the base material PP cellular board 1 to obtain the cover plate of the surface fabric 2 bonded on the lower surface skin 12 of the base material PP cellular board 1; equivalently, the lower side surface of the PP cellular board 1 is adhered with the back surface fabric 2 to form a semi-finished cover plate which is not covered with edges and is formed by hot melting, adhering and covering the surface fabric 2 and the PP cellular board 1 as a whole;
as shown in fig. 2-6, the obtained cover plate without edge covering is placed into the die cavity of the corresponding die, the placement position of the semi-finished cover plate can be adjusted, the effective area of the corresponding cover plate in the effective area of the die is ensured, then, after the hot knife 4 of the upper die frame 3 of the die corresponding to the edge covering area is heated, the control of the heating temperature is adjusted according to the actual requirement, the surface can be softened by hot melting, and the viscosity can be ensured, the upper die frame 3 of the die is controlled to be pressed downwards, the upper surface 11 and the honeycomb core 13 of the PP honeycomb plate 1 of the substrate are heated, melted and softened slowly and pressed downwards continuously along with the heating of the hot knife 4 and the pressing of the upper die frame 3, until the outer side edge of the hot knife 4 on the upper die frame 3 touches the surface of the lower die frame 6 of the die to cut off the redundant waste material area on the outer side, and when the waste material area is cut off, an effective area of a lower area of the cover plate can be reserved below the hot cutter and used as a flanging edge, the outer cutter and the inner side of the lower portion of the hot cutter 4 can form a step shape, the hot cutter 4 forms an upward concave groove corresponding to the flanging edge area, so that the lower portion of the cover plate corresponding to the flanging edge area can be effectively reserved when the waste material area is cut off, at the moment, the upward floating module 5 is attached to the upper surface of the cover plate, meanwhile, the corresponding part of the base material PP honeycomb plate 1 below the hot cutter 4 serves as the flanging edge corresponding area, and the corresponding part of the base material PP honeycomb plate 1 below the hot cutter 4 serves as the flanging edge corresponding area; the lower surface skin 12 of the PP honeycomb panel 1, a partially softened molten mass and the surface fabric 2 which are equivalent to the rest of the base material in the corresponding area of the hot cutting knife 4 are used as the corresponding area of the turned edge;
then, combining the processes as shown in fig. 4 to 5, continuously pressing down the middle area of the corresponding cover plate by the upper floating module 5, moving the lower floating module 7 on the lower die frame 6 downwards in a linkage manner, enabling the corresponding area of the turned edge to stand up and adhere to the corresponding side surface of the cover plate in the process of pressing down the lower die frame 6 and the upper floating template 5 by means of the lower die frame 6, forming adhesion and solidification at the adhesion position in the process of completing die assembly and pressure maintaining, lifting the upper floating module 5, synchronously moving the lower floating module 7 upwards and jacking up, moving the upper die frame 3 upwards and lifting up, driving the product with the edge covered therein to move upwards and jacking up after the lower floating module 7 moves upwards, and taking out the corresponding product, wherein the vertical movement of the lower die frame 1 can be realized by adopting a conventional mode in the field such as vertical movement by oil cylinder driving, and the vertical movement of the upper floating module 5 and the lower floating module 7 can be realized by adopting a conventional mode in the field such as oil cylinder driving and the like The purpose of moving, or adopt spring and oil cylinder drive cooperation etc. conventional linkage drive mode.
Preferably, in the above edge covering method, the lower surface of the hot cutter 4 corresponding to the turned edge region is planar, and the surface of the hot cutter 4 corresponding to the turned edge region can be attached to the surface of the corresponding turned edge in a planar manner. The hot cutter 4 can be heated better on the surface of the corresponding edge covering area, the whole surface can be heated uniformly, and the surface of the melting area is relatively flat after being pressed down, so that the flatness of subsequent bonding is facilitated. Further, it is preferable to have the pair of hot-cutting blades 4The two surfaces of the position to be covered are planar, namely the lower surface of the hot cutter 4 and the side surface close to the die cavity side are both planar, a right angle is formed on the inner side of the hot cutter 4, the side surface of the PP honeycomb plate 1 corresponding to the base material and attached to the side surface of the hot cutter 4 and the surface of the corresponding covered area can be heated, and the bonding effect is improved. Further, in the pressing process, a right-angle shearing blade is formed between the upper floating module 5 of the upper die frame 3 and the lower die frame 6. The angle-shaped downward movement is equivalent to the effect of similar shearing, so that the material overflow can be better avoided, and the flatness of the edge covering is improved. As shown in fig. 2, it is preferable that the angle formed between the upper surface 61 of the lower mold frame 6 and the corresponding side surface 62 of the lower mold frame 6 near the mold cavity is a right angle, which is favorable for better forming the shearing effect. Further, as shown in fig. 7, the cavity gap between the upper floating module 5 and the lower floating module 7 of the mold is T + 1/3T; wherein T is the distance between the edge of the turned edge and the side surface of the cover plate, and T is the thickness of the surface fabric 2. T is equivalent to the width of the turnover area, and the method is used for calculating and designing the die cavity gap, so that the quality of edge covering can be better improved, and the requirements on flatness and the neatness of the upper surface skin are improved. The thickness of the folded edge bonded to the side face was 1/3t + (A)1+A2) Wherein t is the thickness of the surface fabric 2, A1Is the thickness of the lower skin 12 of the PP honeycomb panel 1, A2Is the thickness of the upper skin 11 of the PP honeycomb panel 1. The overall attractiveness of edge binding is improved, and the effects of tighter binding and high flatness are achieved.
As a further preferred embodiment, the upper skin 11 and the lower skin 12 of the PP honeycomb panel 1 are both made of a polypropylene and glass fiber mixed material; the core material of the honeycomb core 13 of the PP honeycomb plate 1 is made of polypropylene material. The materials are matched, so that the hot-melt adhesive has better adhesive capacity in a molten state, and the added glass fibers not only have reinforcing performance, but also can be mutually distributed at the interface position of the adhesive part during adhesion, so that the effect of increasing the adhesive force is achieved. It is preferable that the content of the glass fiber in the upper skin is 10 wt% to 15 wt%, and the length of the glass fiber is 40mm to 60 mm. The fibers can be more effectively distributed in the interfaces on the two sides of the bonding part with higher probability to form a tensioning effect, and the bonding capability is improved. The surface fabric 2 may also be made of a polyester fiber material.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
While the invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope thereof.
Claims (7)
1. A method for wrapping a spare tire cover plate of an automobile trunk is characterized by comprising the following steps:
A. heating and melting the outer surface of the lower surface skin (12) of the base material PP cellular board (1) to be sticky, and then laminating and bonding the surface fabric (2) and the base material PP cellular board (1) to obtain a corresponding semi-finished cover plate;
B. putting the obtained semi-finished cover plate into a die cavity of a corresponding die, heating a hot cutter (4) of an upper die frame (3) of the die corresponding to a wrapping area, controlling the upper die frame (3) to press downwards, and continuously pressing the hot cutter (4) to the surface of an upper surface skin (11) and a honeycomb core (13) of a base material PP honeycomb plate (1) after heating and melting the surface of the upper surface skin and the honeycomb core to the outer side of the hot cutter (4) to touch the surface of a lower die frame (6) of the die so as to cut off redundant waste material areas on the outer side and reserve a corresponding lower area of the cover plate below the hot cutter (4) as a corresponding turned edge;
C. continuously pressing the middle area of the corresponding semi-finished cover plate downwards through an upper floating module (5) of an upper die frame (3), forming a right-angled shearing knife edge between the upper floating module (5) and a lower die frame (6) in the pressing process, simultaneously moving a lower floating module (7) on the lower die frame (6) downwards to enable the corresponding area of the turned edge to stand up to be bonded with the corresponding side surface of the semi-finished cover plate, curing, finishing edge covering, and taking out a corresponding finished product;
the die cavity gap between the upper floating die block (5) and the lower floating die block (7) is T + 1/3T;
wherein T is the distance between the edge of the turned edge and the side face of the semi-finished cover plate, and T is the thickness of the surface fabric (2).
2. The method for hemming the spare tire cover plate of the automobile trunk according to claim 1, wherein in the step B, the lower surface of the hot cutter (4) corresponding to the hemming area is in a plane shape, and the surface of the hot cutter (4) corresponding to the hemming area can be attached to the surface of the corresponding hemming in a plane shape.
3. The method for hemming the spare tire cover of the automobile trunk according to claim 1, wherein an angle formed between the upper surface (61) of the lower mold frame (6) and the side surface (62) of the lower mold frame (6) near the mold cavity is a right angle.
4. The method for hemming the spare tire covers of automobile trunks according to any one of claims 1 to 3, wherein the thickness of the turned-over edge after being adhered to the side in step C is 1/3t + (A)1+A2) Wherein t is the thickness of the surface fabric (2), A1Is the thickness of the lower skin (12) of the PP cellular board (1), A2Is the thickness of the upper surface skin (11) of the PP honeycomb plate (1).
5. The method for hemming the spare tire covers of the automobile trunk according to any one of claims 1 to 3, characterized in that the upper surface skin (11) and the lower surface skin (12) of the PP cellular board (1) are both made of a polypropylene and glass fiber mixed material; the core material of the honeycomb core (13) of the PP honeycomb plate (1) is made of polypropylene material.
6. The method for hemming a spare tire cover plate of an automobile trunk according to claim 5, characterized in that the content of the glass fiber in the upper skin (11) is 10 wt% -15 wt%, and the length of the glass fiber is 40mm-60mm of short fiber.
7. A method for hemming a spare tire cover of an automobile trunk according to any one of claims 1 to 3 wherein step a the face fabric (2) is made of a polyester fiber material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911251173.XA CN111016385B (en) | 2019-12-09 | 2019-12-09 | Method for wrapping spare tire cover plate of automobile trunk |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911251173.XA CN111016385B (en) | 2019-12-09 | 2019-12-09 | Method for wrapping spare tire cover plate of automobile trunk |
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| Publication Number | Publication Date |
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| CN111016385A CN111016385A (en) | 2020-04-17 |
| CN111016385B true CN111016385B (en) | 2022-06-17 |
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| CN201911251173.XA Active CN111016385B (en) | 2019-12-09 | 2019-12-09 | Method for wrapping spare tire cover plate of automobile trunk |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111716868B (en) * | 2020-07-09 | 2022-08-05 | 武汉华迎汽车零部件有限公司 | Covering machine for spare tire cover plate and processing technology of covering machine |
| CN112248479B (en) * | 2020-09-22 | 2023-04-11 | 无锡吉兴汽车部件有限公司 | Production process of spare plate of automobile trunk |
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