CN214057417U

CN214057417U - Car EPP ceiling

Info

Publication number: CN214057417U
Application number: CN202020107541.5U
Authority: CN
Inventors: 钟丛荣; 贺昌华; 邓勇
Original assignee: Sichuan Lidengwei Automobile Parts Co ltd
Current assignee: Sichuan Nuoyang Auto Parts Co ltd
Priority date: 2019-03-19
Filing date: 2020-01-17
Publication date: 2021-08-27
Anticipated expiration: 2030-01-17
Also published as: CN111204294A; CN111204294B

Abstract

The utility model discloses an automobile EPP ceiling, which is integrally formed by EPP materials; the EPP ceiling is integrally formed by an EPP material; with EPP ceiling integrated into one piece is equipped with the strengthening rib, the strengthening rib is along the horizontal or/and longitudinal distribution of EPP ceiling, have light in weight, the heat-proof quality is good, low smell, the characteristics that low VOC produced, and the ceiling thickness homogeneity after the shaping is good, the boundary strength of bending of ceiling is high, the bulk strength of ceiling is high, there is good mechanical properties, long service life, can with the fine assembly contact of automobile body top cap metalwork, can not produce the abnormal sound at the driving in-process, and ceiling assembly rear surface is more regular, can weave etc. with the cladding and more laminate, reduce the fold, the planarization is good, can save the oil consumption, can improve driving safety factor again, and the reinforcing is taken the travelling comfort.

Description

Car EPP ceiling

Technical Field

The utility model relates to an automotive filed, concretely relates to light environment-friendly car EPP ceiling.

Background

The ceiling is an important component of the interior trim of the whole automobile, and has the main functions of improving the decoration property in the automobile and simultaneously improving the heat insulation effect with the outside of the automobile; the noise in the vehicle is reduced, and the sound absorption effect is improved; the riding comfort and the safety of passengers are improved. The ceiling is molded by compression molding, and a PP plate is commonly used, and is put into a metal (or resin) female and male mold, and is heated, pressurized, cured and molded. The ceiling contour and the opening are formed by high-pressure water cutting or die cutting (a die is provided with a blunderbuss), but the problems of poor cutting precision, poor size control, easy generation of burrs and the like are easily caused. And because the plate is heated and pressed to be formed, the bending part of the plate becomes thin, so that the strength of the automobile ceiling is uneven, the strength of the bending boundary is relatively weak, and the strength of the bending boundary is easily influenced and damaged by stress in the driving process, thereby further influencing the service life of the ceiling. And the automobile ceiling in the prior art can not meet the light weight requirement and can not achieve the purpose of weight reduction. In the prior art, EPP is adopted to replace PP as an automobile ceiling to meet the requirement of light weight, but the problems are also caused because the plate is directly heated and extruded to be formed. In addition, the existing automotive ceiling trim mounting bracket and the existing skylight reinforcing frame are generally adhered to a ceiling base material by hot melt adhesives, and the adhesion mode can be aged in long-term use to cause the adhesion strength to be reduced and can cause falling or damage; the ceiling lamp is damaged or falls off from the ceiling, and personal safety is easily damaged. And too much use sticky mode not only influence the whole atress of ceiling, still can lead to smell, VOC to produce, too much bonding fixed knot constructs the influence the surface smoothness of ceiling, influences the cladding laminating nature of fabric, too much connection structure also can lead to abnormal sound. And the interior trim installing support still has the not good problem of toughness, can not play fine cushioning effect under the condition that takes place strong vibrations or take place the impact in the vehicle driving process, breaks easily.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing an automobile EPP ceiling, through EPP material integrated into one piece, light in weight has, the heat-proof quality is good, low smell, the characteristics that low VOC produced, and ceiling thickness homogeneity after the shaping is good, the border department intensity of bending of ceiling is high, the bulk strength of ceiling is high, mechanical properties is good, long service life, can with the fine assembly contact of automobile body top cap metalwork, can not produce the abnormal sound at the driving in-process, and ceiling assembly rear surface is more regular, can weave etc. with the cladding and more laminate, reduce the fold, the planarization is good, can save the oil consumption, can improve driving safety factor again, and the reinforcing is taken the travelling comfort.

The utility model discloses an automobile EPP ceiling, which is integrally formed by EPP materials;

further, reinforcing ribs are integrally formed with the EPP ceiling and distributed along the transverse direction or/and the longitudinal direction of the EPP ceiling;

further, the EPP ceiling is directly formed by the extrusion of EPP particles through a die;

further, the EPP particles are heated and extruded by a die, so that the EPP particles are welded to form the integral EPP ceiling directly;

further, the EPP ceiling is formed by the EPP particles through the extrusion of a die under the action of high-temperature steam, so that the EPP particles are welded, and after the EPP ceiling is formed through extrusion welding, particle boundary grains are formed between the adjacent EPP particles on the surface of the EPP ceiling;

further, the grain boundary grains are irregular closed grains;

furthermore, a plurality of areas are distributed on the surface of the EPP ceiling, the areas are formed by arranging point-shaped bulges, and the areas are regularly distributed on the surface of the EPP ceiling;

further, an interior trim part mounting bracket is integrally formed with the EPP ceiling;

the skylight reinforcing frame is integrally formed with the EPP ceiling and comprises a plurality of strip-shaped bulges, the strip-shaped bulges comprise transverse ribs and longitudinal ribs, the transverse ribs and the longitudinal ribs are in cross connection to form a grid structure, and the skylight reinforcing frame is fixedly connected with the skylight through mushroom hasps;

further, offer the pipeline groove that is used for the drain pipe and the pencil draw-in groove that is used for the wiring on the EPP ceiling, pipeline groove and pencil draw-in groove all form through the impression when the EPP ceiling is fashioned.

An object of the utility model is to provide a car EPP ceiling, through EPP material integrated into one piece, light in weight has, the heat-proof quality is good, low smell, the characteristics that low VOC produced, and the ceiling thickness homogeneity after the shaping is good, the boundary department intensity of bending of ceiling is high, the bulk strength of ceiling is high, mechanical properties is good, long service life, can with the fine assembly contact of automobile body top cap metalwork, can not produce the abnormal sound at the driving in-process, and ceiling assembly rear surface is more regular, can weave etc. with the cladding and more laminate, reduce the fold, the planarization is good, can save the oil consumption, can improve driving safety factor again, and the reinforcing is taken the travelling comfort.

Drawings

The invention will be further described with reference to the following figures and examples:

FIG. 1 is a schematic view of a partially enlarged structure of an EPP ceiling board of an automobile according to the present invention;

FIG. 2 is a schematic structural view of an EPP roof of an automobile with a skylight reinforcing frame;

fig. 3 is an enlarged structural view of the skylight reinforcing frame of fig. 2.

Detailed Description

FIG. 1 is a schematic structural view of an EPP ceiling board of an automobile according to the present invention; FIG. 2 is a schematic structural view of an EPP roof of an automobile with a skylight reinforcing frame; FIG. 3 is an enlarged view of the reinforcing frame of FIG. 2; as shown in the drawings, in the vehicle EPP ceiling of the present embodiment, the EPP ceiling 1 is integrally molded by an EPP material; the ceiling structure is directly formed by adopting the EPP material, the use of adhesive is reduced, and the ceiling structure has the characteristics of light weight, good heat insulation, low odor and low VOC (volatile organic compounds). And the thickness of the EPP ceiling 1 at the bending corner part and other parts is uniform and good, so that the problem that the automobile ceiling plate which is formed by plate heating and pressing is easily influenced by the thinning strength of the bending part is solved.

In the embodiment, the reinforcing ribs are integrally formed with the EPP ceiling 1 and distributed along the transverse direction or/and the longitudinal direction of the EPP ceiling 1; the existing automobile ceiling is generally not provided with the reinforcing ribs, the structural strength of the ceiling cannot be improved, or the reinforcing ribs need to be additionally arranged, the reinforcing ribs are not integrally formed with the ceiling, the integrity and the attractiveness of the ceiling are affected, and the reinforcing ribs cannot fully exert the functions. In this embodiment, the reinforcing ribs of the EPP ceiling 1 are formed in the EPP ceiling molding process, and the ceiling reinforcing ribs are directly formed by the EPP ceiling material, so that the function of the reinforcing ribs can be exerted, the structural strength of the EPP ceiling 1 is made higher, and the integrity of the EPP ceiling 1 is not affected. The arrangement of the reinforcing ribs can be designed and arranged according to the actual strength requirement, and the reinforcing ribs can be distributed only along the transverse direction or the longitudinal direction of the EPP ceiling, and can also be distributed longitudinally and transversely or in a staggered way, wherein the longitudinal direction and the transverse direction are relative to the length direction and the width direction of the EPP ceiling. In order to enhance the appearance of the inner surface of the roof after the roof is installed, the reinforcing ribs are generally positioned on the outer surface of the roof after the roof is installed, so that the reinforcing ribs play a role of enhancing the strength of the roof and do not influence the aesthetic property of the interior trim. Therefore, the EPP ceiling can be directly used without a coating fabric, so that the ceiling manufacturing procedures are reduced, and the economic cost is saved.

In the embodiment, the EPP ceiling 1 is directly formed by extruding EPP particles through a die; the EPP particles are directly formed in a mould (different from the traditional plate compression forming), which is equivalent to the raw material direct forming, the EPP particles directly form the EPP ceiling 1 with the ceiling shape and structure in a mould cavity, the thickness uniformity of each part of the EPP ceiling 1 can be ensured, particularly, at the bending boundary of the EPP ceiling 1, the EPP particles are extruded and formed in the mould, the forming precision and the structural strength of the bending boundary can be ensured, the forming is easier than the traditional plate compression forming, the strength of the bending boundary of the ceiling is easier to control, the strength of the corner bending part is not affected, the structural strength of each part of the EPP ceiling 1 is ensured, the stress integrity of the EPP ceiling 1 is ensured, and the service life of the automobile ceiling is prolonged.

In the embodiment, the EPP particles are heated and extruded by a die, so that the EPP particles are welded directly to form the integral EPP ceiling 1; the mutual extrusion butt fusion forms the structure and the shape of ceiling between the EPP particle, owing to be extrusion butt fusion shaping between the particle, therefore the thickness homogeneity at ceiling corner bending part is good, forms closely knit structure behind the particle extrusion butt fusion, and the weld strength between particle and the particle is higher, and consequently, the thickness at ceiling corner bending part can not become thin, and the structural strength at ceiling corner bending part is not influenced. Therefore, the ceiling structure that butt fusion extrusion butt fusion formed between the EPP particle has higher overall structure intensity, can prolong the life of ceiling, better shock attenuation sound insulation effect has simultaneously, product surface does not have the fold, no delaminating, product defects such as swell, and have better peel strength, the car ceiling by EPP particle hot briquetting has not only played fine weight reduction effect, and can directly replace materials such as PU commonly used in present car ceiling structure, PP panel, glass fiber, non-woven fabrics, rolling glue, not only practice thrift economic cost, and environmental protection.

In the embodiment, the EPP ceiling 1 is formed by the EPP particles through the extrusion of a die under the action of high-temperature steam, so that the EPP particles are welded, and the EPP ceiling 1 is formed into the particle boundary grains 12 between the adjacent EPP particles on the surface of the EPP ceiling 1 after extrusion, welding and molding; EPP particle shaping in the mould, the mould has the structure of car roof, the EPP particle after with the pre-compaction is filled into the mould, the EPP particle mutual extrusion butt fusion shaping under the high temperature steam effect in the mould, the high temperature steam effect can be better makes the EPP particle shaping and satisfy the intensity requirement after the shaping, and the circulation effect of high temperature steam, it is more even to make the EPP particle be heated, can ensure the shaping homogeneity of EPP roof, the uniformity of 1 each part structural strength of EPP roof, also do benefit to the shaping of car roof corner turn department EPP particle in mould cavity, ensure the structural strength of car roof corner department of buckling. The surface of the formed EPP ceiling 1 is provided with grain boundary grains 12, namely the grains are grains formed around the grain boundary after extrusion, the apparent shape of the grains after the EPP grains are extruded and welded is also reflected, the surface formed after the EPP grains are welded is good in smoothness, the grains and the grains are clear and visible in shape, and the appearance of the EPP ceiling is enhanced. The formed EPP ceiling can be used for the automobile ceiling without being coated with a fabric, and the particle boundary grains 12 formed among the EPP particles on the surface of the EPP ceiling 1 can play a role in decoration.

In this embodiment, the grain boundary lines 12 are irregular closed lines; the grain boundary grain 12 is a linear boundary grain formed by the outer contour line of the welded grain, and shows the apparent shape of the surface of the grain after extrusion welding, and presents different shapes according to the extrusion welding state and force. The closed grains mean that the particles are tightly connected, a compact structure is formed, the welding strength between the particles is high, the structural strength of the EPP ceiling 1 is higher, and the heat insulation, sound insulation and shock absorption are better.

In this embodiment, a plurality of areas 14 are distributed on the surface of the EPP ceiling 1, the areas 14 are formed by arranging point-like protrusions 13, and the areas are regularly distributed on the surface of the EPP ceiling; the plurality of areas 14 are distributed on the surface of the EPP ceiling 1 at equal intervals; the dot-shaped bulges 13 are formed in the EPP particle forming process, steam needs to be introduced into a mould for EPP particle forming, so that a pinhole-shaped or strip-shaped steam plug is added into a mould cavity, and fine dot-shaped bulges are formed on the surface of an EPP ceiling and depend on the shape structure of the steam plug. The burr in this embodiment is in a dot-like structure in shape and configuration, and dot-like protrusions 13 are densely distributed in a round or round-like nodular region 14, and then are distributed at equal intervals on the EPP ceiling surface (surface after formation of EPP particles) in the form of the nodular region 14. The distribution of the plurality of regions 14 depends on the distribution of the vapor lock in the mold cavity.

In this embodiment, an interior trim mounting bracket 2 is integrally formed with the EPP ceiling 1; the interior trim part mounting bracket 2 is integrally formed with the EPP ceiling in a pre-embedded mode or is directly formed in the EPP ceiling forming process; the interior trim part mounting bracket 2 is used for mounting an interior trim part, for example, for mounting a ceiling lamp. That is, before the ceiling is molded in a mold, the mounting bracket is embedded in the material of the ceiling, and the mounting bracket is tightly covered and fixed to form a structure in which the mounting bracket and the ceiling are integrated in a foaming process of the ceiling material. For example, the rear dome lamp holder and the front dome lamp holder are made of galvanized iron materials, and can be integrally formed with the EPP ceiling 1 in an embedded manner. The interior trim part mounting bracket 2 can also be formed by foaming the EPP ceiling 1; that is, in the process of foaming the ceiling 1 material, a mounting bracket is formed on the ceiling 1, and the mounting bracket is a part of the whole ceiling 1 after the foaming, that is, a mold itself for manufacturing the ceiling base material has a mounting bracket structure, and EPP (polypropylene plastic foam) is poured into the mold and foamed. For example, if the interior material mounting bracket 2 is made of an EPP material, it can be foamed together with an EPP ceiling, and the structure of the interior material mounting bracket 2 is controlled by a mold. The structure of interior trim part installing support 2 and EPP ceiling 1 integrated into one piece has reduced installation procedure and bonding process, improves the firm in connection nature and the stability of interior trim part installing support 2 and ceiling, improves the bulk strength of ceiling, reduces smell, VOC production simultaneously, improves the laminating nature of cladding fabric, reduces the fold to the cooperation effect is better, avoids abnormal sound, the noise reduction that can be better. The EPP (polypropylene foam) ceiling is a light material and has good acoustic performance, so the EPP ceiling is in assembly contact with a metal part of a top cover of a vehicle body, when the vehicle runs, no friction abnormal sound is emitted, the noise, vibration and harshness (NVH) acoustic performance and abnormal sound of the whole vehicle are well improved, and meanwhile, the EPP ceiling has good heat insulation performance.

In the embodiment, the skylight structure further comprises a skylight reinforcing frame 3 integrally formed with the EPP roof 1, wherein the skylight reinforcing frame 3 is composed of a plurality of strip-shaped protrusions 11 on the EPP roof 1, each strip-shaped protrusion 11 comprises a transverse rib 11a and a longitudinal rib 11b, and the transverse ribs 11a and the longitudinal ribs 11b are connected in a crossed manner to form a grid-shaped protrusion; protruding 112 of bar is the same with EPP ceiling skeleton material, namely, when EPP ceiling skeleton passes through the mould shaping, protruding 112 of bar also takes shape in EPP ceiling skeleton, this kind of integrated into one piece's structure has reduced skylight and has strengthened frame 3 through the step that the hot melt adhesive bonded, the process has not only been practiced thrift, weight has been lightened, the intensity of car roof has still been increased, skylight that protruding 112 of bar formed strengthens frame 3 also as the strengthening rib use of ceiling, moreover skylight strengthen frame 3 self structural strength and with the stability of being connected of skylight also corresponding improvement. The EPP ceiling refers to a ceiling framework made of polypropylene plastic foaming materials (EPP). Set up the installation that skylight reinforcing frame was used for the skylight on the car EPP ceiling that needs set up the skylight, skylight reinforcing frame 3 has reduced installation procedure and bonding process with 1 integrated into one piece's of EPP ceiling structure, improve the fastness of connection and the stability of skylight reinforcing frame 3 and ceiling, improve the bulk strength of ceiling, reduce smell simultaneously, VOC produces, improve the laminating nature of cladding fabric, reduce the fold, thereby the cooperation effect is better, avoid the abnormal sound, the noise reduction that can be better.

In this embodiment, the skylight reinforcing frame 3 is fixedly connected with the skylight through a mushroom hasp; the strip-shaped bulge 11 is provided with a mushroom hasp 6 for being connected with a skylight; the mushroom hasps 6 are uniformly distributed along the annular skylight reinforcing frame 3 at equal intervals; the skylight reinforcing frame 3 and the skylight framework are connected together through the occlusion between the mushroom hasps 6 respectively adhered on the skylight reinforcing frame 3 and the skylight framework, so that the peripheral part of the skylight opening of the ceiling is fixed on the vehicle body, and the skylight reinforcing frame is convenient and simple to manufacture and assemble, high in efficiency and good in effect; the mushroom hasp 6 can also be a snap button, a nylon hasp or a magic button. A foam cushion block 7 is arranged at the edge of the EPP ceiling 1; the installation with metal framework is convenient for, plays the absorbing effect simultaneously to improve the compactness of laminating.

In this embodiment, a pipeline groove 4 for a drain pipe and a harness clamping groove 5 for wiring are provided on the EPP ceiling 1, and the pipeline groove and the harness clamping groove are formed by stamping when the EPP ceiling 1 is molded. The pipeline groove 4 and the wiring harness clamping groove 5 are formed by coining when the EPP ceiling 1 is formed by foaming; that is, while the EPP ceiling 1 is foam-molded in the mold, the pipe groove 4 and the wire harness clamping groove 5 may be generated by imprinting on the EPP ceiling 1; the wire harness clamping grooves 5 are distributed at equal intervals along the wire harness direction; the installation and the fixed of pencil of being convenient for do not influence EPP ceiling 1's intensity simultaneously again, improve surface regularity.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims

1. An automobile EPP ceiling which is characterized in that: the EPP ceiling is integrally formed by an EPP material; and reinforcing ribs are integrally formed with the EPP ceiling and distributed along the transverse direction or/and the longitudinal direction of the EPP ceiling.

2. The EPP roof of a vehicle according to claim 1, characterized in that: the EPP ceiling is formed by extrusion welding of EPP particles, and grain boundary lines are formed between adjacent EPP particles on the surface of the EPP ceiling.

3. The EPP roof of a vehicle according to claim 2, characterized in that: the grain boundary lines are closed lines.

4. The EPP roof of a vehicle according to claim 3, wherein: a plurality of areas are distributed on the surface of the EPP ceiling, the areas are formed by arranging point-shaped bulges, and the areas are regularly distributed on the surface of the EPP ceiling.

5. The EPP roof of a vehicle according to claim 1, characterized in that: and an interior trim part mounting bracket is integrally formed with the EPP ceiling.

6. The EPP roof of a vehicle according to claim 1, characterized in that: still include with EPP ceiling integrated into one piece's skylight reinforcing frame, the skylight reinforcing frame comprises a plurality of bars are protruding, the bar is protruding including horizontal rib and vertical rib, horizontal rib and vertical rib cross connection are latticed structure, the skylight reinforcing frame passes through mushroom hasp and skylight fixed connection.

7. The EPP roof of a vehicle according to claim 1, characterized in that: offer the pipeline groove that is used for the drain pipe and the pencil draw-in groove that is used for the wiring on the EPP ceiling, pipeline groove and pencil draw-in groove all form through the impression when the EPP ceiling is fashioned.