CN112606689B - Instrument board slush molding foaming sealing structure and foaming process - Google Patents
Instrument board slush molding foaming sealing structure and foaming process Download PDFInfo
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- CN112606689B CN112606689B CN202011576168.9A CN202011576168A CN112606689B CN 112606689 B CN112606689 B CN 112606689B CN 202011576168 A CN202011576168 A CN 202011576168A CN 112606689 B CN112606689 B CN 112606689B
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- sealing
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- 238000007789 sealing Methods 0.000 title claims abstract description 189
- 238000005187 foaming Methods 0.000 title claims abstract description 162
- 238000000465 moulding Methods 0.000 title claims abstract description 122
- 238000000034 method Methods 0.000 title claims abstract description 49
- 230000008569 process Effects 0.000 title claims abstract description 44
- 210000003491 skin Anatomy 0.000 claims description 40
- 230000007704 transition Effects 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 22
- 230000008859 change Effects 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 12
- 238000003801 milling Methods 0.000 claims description 9
- 210000002615 epidermis Anatomy 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 3
- 239000006260 foam Substances 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000012797 qualification Methods 0.000 abstract description 2
- 239000006261 foam material Substances 0.000 abstract 1
- 239000003292 glue Substances 0.000 description 8
- 238000009434 installation Methods 0.000 description 4
- 230000000873 masking effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 206010016322 Feeling abnormal Diseases 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000013518 molded foam Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 230000035943 smell Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
- B60K35/50—Instruments characterised by their means of attachment to or integration in the vehicle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/102—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing characterised by material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/108—Special methods for making a non-metallic packing
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Instrument Panels (AREA)
Abstract
The invention discloses a foam sealing structure and a foam process for instrument panel slush molding, and relates to the field of design and manufacture of automobile parts, wherein the foam sealing structure comprises an instrument panel body framework, a slush molding surface skin and a foam layer, a foam area where the foam layer is positioned adopts a closed mold for foaming and is provided with a foam material pouring port, and a first soft sealing structure is arranged in the front end area of the instrument panel body framework and the slush molding surface skin; a first hard sealing structure is arranged at the rear end areas of the instrument panel body framework and the slush molding surface skin; by implementing the technical scheme, the technical problem of low quality qualification rate of the existing slush molding foaming instrument board product can be effectively solved, the soft sealing structure and the hard sealing structure are skillfully combined, the molding quality of the product after slush molding foaming molding can be effectively improved, and meanwhile, the manufactured instrument board foaming piece is thicker in thickness, soft and comfortable in hand feeling, so that the overall quality is greatly improved.
Description
Technical Field
The invention relates to the field of design and manufacture of automobile parts, in particular to a slush molding foaming sealing structure of an instrument board and a foaming process for slush molding foaming by applying the same.
Background
The passenger cabin of the automobile is the place where the man-machine interaction between the automobile and the passenger is most frequent, the passenger can interact with interior parts in the passenger cabin from aspects of vision, hearing, touch and smell, and the touch is taken as an example, and the passenger body can have hard and soft feeling when touching the interior parts; the visual feeling of the user is caused by the surface material structure and the surface treatment technology of the interior parts, and even the feeling of the quality of the automobile is influenced, so that the soft instrument panel is more and more popular with the user.
The existing soft instrument panel generally comprises a coated instrument panel, a female mold molded instrument panel and a slush molding foaming instrument panel; however, most of slush molding instrument boards in the prior art adopt an open mold casting process, and the product modeling and design freedom degree are severely restricted; secondly, the instrument board is mostly processed by stress, which is easy to crack to cause poor overall continuity, and the quality problems of wrinkles, holes, collapse, glue leakage and the like are easy to occur after foaming molding, so that the product quality qualification rate is low; meanwhile, the process side of the epidermis process side agent framework is difficult to remove after foaming molding, and the labor cost of enterprises is high.
Disclosure of Invention
The invention aims to provide the instrument board slush molding foaming sealing structure, which aims to skillfully combine a soft sealing structure and a hard sealing structure, and can effectively improve the molding quality of a product after slush molding foaming molding so as to greatly improve the overall quality.
The technical scheme adopted by the invention is as follows:
The utility model provides a instrument board slush molding foaming seal structure, includes instrument board body skeleton, slush molding epidermis and foaming layer, the foaming region that the foaming layer is located adopts closed mould foaming and disposes foaming material pouring gate, is equipped with first soft seal structure in the front end region of instrument board body skeleton and slush molding epidermis; and a first hard sealing structure is arranged at the rear end areas of the instrument board body framework and the slush molding surface skin.
The technical scheme adopts the ingenious combination of the soft sealing structure and the hard sealing structure, the hard sealing structure is used for sealing in the foaming process, and when the foaming material is about to reach a soft sealing area, the soft sealing structure is used for sealing, so that the sealing performance is stable, the whole foaming continuity can be effectively ensured, and the problems of wrinkling, hollowing, collapse, glue leakage and the like are avoided; meanwhile, the foaming area adopts the closed mold foaming, compared with the open mold pouring process, the degree of freedom of appearance design is larger, the multi-position back-off molding can be realized, in addition, the stress-free processing process of the product is difficult to crack and then produce no seam, the whole dermatoglyph is even and attractive, and compared with the prior art, the female mold molding foaming is easy to damage.
As a preferable scheme, the first soft sealing structure comprises an inflation hose, the inflation hose is arranged in the front end area of the instrument panel body framework and the slush molding surface skin, and when the foaming material is about to reach the soft sealing area, the inflation hose is used for inflating to complete soft sealing; the inflatable hose is adopted to realize foaming sealing, so that on one hand, bubbles in a foaming area can be extracted, and poor foaming at the combination position of the soft sealing and the hard sealing is prevented; on the other hand, the inflatable hose can be utilized to realize better inflatable sealing at a local position, the molding quality of the product after slush molding and foaming molding is improved, and the inflatable hose has good practicability in a foaming process.
As a preferable scheme, the first soft sealing structure further comprises a bolt composition structure, wherein the bolt composition structure is arranged on a skeleton technological edge of a front end area where the instrument board body skeleton and the slush molding skin are positioned; the design of the bolt composition structure can enable the installation stability of the instrument board body after the framework is buckled to be better, and meanwhile, the design precision of the inflatable hose is improved, so that the sealing stability of the whole foaming process is improved.
As a preferable scheme, the bolt composition structure comprises at least four bolt structures, and the distance L1 between every two adjacent bolt structures is 260-300mm, so that the structural stability of the technological edge of the framework after the framework of the instrument board body is buckled is improved. As a further preferable scheme, the front end of the plug pin structure is provided with a guide bevel angle beta, and the bevel angle beta is 15-20 degrees, so that the instrument board body framework is conveniently installed in the foaming mould.
As a preferable scheme, the tail ends of the two sides of the instrument board body framework and the slush molding surface are provided with second soft sealing structures, and the tail ends of the rear ends of the instrument board body framework and the slush molding surface are provided with third soft sealing structures; preferably, the second soft sealing structure and the third soft sealing structure both comprise an inflatable hose and a bolt forming structure, and a gradual transition structure is arranged at the position of an inflatable joint between the instrument panel body framework and the slush molding surface; the transition structure of the gradual change surface can effectively prevent the foaming failure at the combination position of soft and hard sealing, such as wrinkling, hollowing, collapse, glue leakage and other technical problems.
As a preferable scheme, the length L2 of the transition structure of the gradual change surface along the gradual change area of the foaming layer is more than or equal to 20mm; as a further preferable scheme, the transition structure angle psi of the gradual change surface is about 15 degrees, the gradual change R angle R2 is about R30mm, and the sealing performance of the soft and hard sealing combination position is improved, so that the foaming quality of the product in the area is improved.
As a preferable scheme, the first hard sealing structure comprises hard sealing ribs which are arranged on the instrument board body framework and have trapezoid cross sections, the thickness of the hard sealing ribs close to the top end of the slush molding surface skin is smaller than the thickness of the root parts of the hard sealing ribs arranged on the instrument board body framework, and the thickness of the root materials of the hard sealing ribs is determined according to the angle of the die; as a further preferable scheme, the second hard sealing structures are arranged in the A column areas on the two sides of the instrument board body framework and the slush molding surface skin, the second hard sealing structures are preferably identical to the first hard sealing structures, and meanwhile, the transition areas of the gradual change surfaces of the hard sealing structures and the soft sealing structures are preferably the gradual change surface transition structures, so that good sealing effect in the areas is ensured.
On the other hand, the invention also provides a foaming process for performing slush molding foaming by using the instrument board slush molding foaming sealing structure, which comprises the following process steps:
The instrument board body skeleton is formed through an injection mold, the slush molding surface skin is formed through a slush molding mold, the foaming layer is formed through a foaming mold, in the foaming process, the hard sealing structure is used for sealing, and when the foaming material is about to reach a soft sealing area, the soft sealing structure is used for sealing.
Preferably, after the foaming is finished, cutting off the technological edge of the instrument board body framework and the slush molding surface skin in a milling mode.
The instrument board manufactured by the slush molding foaming process has thicker foaming thickness, generally 4-10mm, so that the instrument board has soft and comfortable hand feeling; after foaming molding, the skin process edge is removed in a manual tearing mode, the skeleton process edge is removed in a milling mode, the automation degree is high, and the labor cost can be greatly reduced.
The invention has the beneficial effects that:
1. The slush molding foaming instrument board adopts the closed mold foaming, in the foaming process, the hard sealing structure is used for sealing, and when the foaming material is about to reach the soft sealing area, the soft sealing structure is used for sealing, so that the whole foaming continuity can be effectively ensured, the problems of wrinkling, hollowing, collapse, glue leakage and the like are avoided, the molding quality of the product after slush molding foaming molding is improved, and the whole quality is greatly improved.
2. According to the first soft sealing structure, the foaming sealing is realized by adopting the inflatable hose, and the installation stability of the instrument board body skeleton after being buckled is guaranteed by combining the bolt composition structure, so that the design accuracy of the inflatable hose is effectively ensured, and on one hand, the design of the inflatable hose can extract bubbles in a foaming area, so that poor foaming at the combining position of the soft sealing and the hard sealing is prevented; on the other hand, the soft sealing structure can realize better inflation sealing at a local position by utilizing the inflation hose, improves the molding quality of the product after slush molding and foaming molding, and has ingenious and reasonable design.
3. The first hard sealing structure adopts the hard sealing ribs with the trapezoid cross sections for sealing, the structural design is simple, ingenious and reasonable, and the treatment process is simplified; and the transition area of the gradual change surface of the hard sealing structure and the soft sealing structure is preferably sealed by adopting the gradual change surface transition structure, so that the sealing effect in the area is better, the seam is not easy to generate, and the whole dermatoglyph is uniform and attractive.
4. The invention can realize the local slush molding foaming process of the body framework, greatly improve the overall continuous aesthetic property, combine the first soft sealing structure and the first hard sealing structure, further provide a second soft sealing structure, a third soft sealing structure and a second hard sealing structure, and provide a gradual transition structure at the position of the inflatable joint of the instrument board body framework and the slush molding surface, wherein the gradual transition structure can effectively prevent the technical problem of poor foaming at the combined position of the soft sealing structure and the hard sealing structure, has soft slush molding texture, and further greatly improves the overall quality.
5. The thickness of the instrument board foaming piece manufactured by the slush molding foaming sealing structure is thicker and is generally 4-10mm, so that the instrument board foaming piece has soft and comfortable hand feeling; after foaming molding, the skin process edge is removed in a manual tearing mode, the skeleton process edge is removed in a milling mode, the automation degree is high, and the labor cost can be greatly reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following description will briefly describe the drawings in the embodiments, it being understood that the following drawings only illustrate some embodiments of the present invention and should not be considered as limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 shows a schematic diagram of a slash molded foam seal configuration for an instrument panel in an embodiment of the invention;
FIG. 2 is a schematic diagram of an instrument panel body skeleton in an embodiment of the invention;
FIG. 3 shows a schematic view of a middle slush skin in an embodiment of the present invention;
FIG. 4 shows a cross-sectional view of A-A of FIG. 1 in accordance with an embodiment of the present invention;
FIG. 5A is a schematic view of a latch structure according to an embodiment of the present invention;
FIG. 5B is a schematic view showing the installation of a latch structure in an embodiment of the present invention;
FIG. 6 illustrates a schematic view of a first hard seal arrangement in an embodiment of the invention;
FIG. 7 is a schematic diagram of a progressive surface transition structure in an embodiment of the invention;
FIG. 8 shows a schematic view of a foam gate in an embodiment of the invention.
In the figure: 1-an instrument panel body skeleton; 2-slush molding the skin; 3-foaming layer; 4-an inflatable hose; 5-foaming mold cavity; 6-foaming mold core; 7-a latch structure; 8-a skeleton technological edge; 9-hard sealing ribs; 10-a gradual transition structure; 11-A column region; 12-epidermis A side; 13-foaming material pouring gate.
Detailed Description
The invention will be further described with reference to the drawings and the specific examples.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Example 1
Referring to fig. 1 to 4, the present embodiment provides a slush molding foaming sealing structure for an instrument panel, which is applied between a foaming mold core 6 and a foaming mold cavity 5 of a slush molding foaming instrument panel mold to ensure the sealing performance and the overall continuity of the slush molding foaming process of the instrument panel; the foaming sealing structure comprises an instrument board body framework 1, a slush molding surface skin 2 and a foaming layer 3, wherein a foaming area where the foaming layer 3 is arranged adopts closed mold foaming and is provided with a foaming material pouring gate, namely, sealing materials in a self-sealing mode can be poured by adopting closed mold.
The front end areas of the instrument panel body skeleton 1 and the slush molding skin 2 are provided with a first soft sealing structure, wherein the front end areas are the same as the front end areas of the molded instrument panel, namely, the areas a-b-c in the embodiment adopt soft sealing; specifically, the first soft sealing structure provided in this embodiment includes an air-filled hose 4, where the air-filled hose 4 is disposed at the front end regions of the instrument panel body skeleton 1 and the slush-molded skin 2, and when the foaming material is about to reach the soft sealing region, the air-filled hose 4 is inflated to complete soft sealing; as a preference of this embodiment, the first soft sealing structure further includes a latch component structure, which is disposed on the skeleton craft edge 8 of the front end region where the instrument panel body skeleton 1 and the slush molding skin 2 are located; the design of the bolt composition structure can enable the installation stability of the instrument board body framework 1 after being buckled to be better, and is beneficial to improving the design precision of the inflatable hose 4 so as to improve the sealing stability of the whole foaming process; by combining the design of the bolt composition structure, the inflatable hose 4 provided by the embodiment is utilized to realize foaming sealing, on one hand, bubbles in a foaming area can be extracted, and bad foaming at the combining position of the soft sealing and the hard sealing is prevented; on the other hand, the inflatable hose 4 can be utilized to realize better inflatable sealing at a local position, so that the molding quality of a product after slush molding and foaming molding is improved, and the inflatable hose has good practicability in a foaming process.
In the embodiment, the structural design of the bolt composition structure is optimized, and as shown in fig. 5A and 5B, at least four bolt structures 7 are arranged on the skeleton technological edge 8 in the a-B-c area in fig. 1, in the embodiment, the thickness t1 of each bolt structure 7 is about 3.0mm, the width a of each bolt structure 7 is about 45mm, and the height h1 of each bolt structure 7 arranged outside the skeleton technological edge 8 after the bolt structure 7 is inserted into the instrument board body skeleton 1 is 40-50mm; in order to improve the structural stability of the technical edge 8 of the framework after the framework 1 of the instrument board body is buckled, the distance L1 between two adjacent bolt structures 7 in the embodiment is kept between 260 and 300mm; meanwhile, in order to facilitate the instrument board body framework 1 to be installed into a foaming mold, the front end of the bolt structure 7 is provided with a guiding bevel angle beta, and the bevel angle beta is 15-20 degrees, so that the structural design is ingenious and reasonable.
The present embodiment is provided with a first hard seal structure at the rear end regions of the instrument panel body skeleton 1 and the slush molded skin 2, where the rear end region is the same as the rear end region generally referred to by the molded instrument panel, that is, the e-f, g-h-j, k-m regions in fig. 1 of the present embodiment; specifically, referring to fig. 6, the first hard sealing structure includes a hard sealing rib 9 disposed on the instrument panel body skeleton 1 and having a trapezoid cross section, wherein the thickness of the hard sealing rib 9 near the top end of the slush molding skin 2 is smaller than the thickness of the root portion of the hard sealing rib 9 mounted on the instrument panel body skeleton 1, and the root material thickness of the hard sealing rib 9 is determined according to the mold angle.
In order to prevent the front end of the instrument panel body frame 1 from deforming in the injection molding or foaming process, a flanging H can be added on the instrument panel body frame 1, and the height of the flanging H is about 5mm; in combination with the design of the slush molding skin 2 in fig. 5, the distance L1 between the soft sealing position slush molding skin a surface 12 and the instrument panel body skeleton 1 is about 2.7mm, the diameter d1 of the air inflation hose 4 is about 10mm, and in the foaming process, the soft sealing is finished by firstly sealing at the hard sealing position, and when the foaming material is about to reach the soft sealing area, the soft sealing is finished by re-inflating the air inflation hose 4.
On the other hand, the embodiment also provides a foaming process for performing slush molding foaming by using the instrument board slush molding foaming sealing structure, which comprises the following process steps:
The instrument board body framework 1 is formed through an injection mold, and the thickness of the instrument board body framework 1 is 3.5mm; the slush molding surface skin 2 is molded by a slush molding die, the thickness of the slush molding surface skin 2 is 1.2mm, and the molding R angle R of the slush molding surface skin 2 is approximately equal to 1.5mm; the foaming layer 3 is formed by a foaming mould, the thickness of the foaming layer 3 is 10mm, in the foaming process, the sealing is finished by the first hard sealing structure, and when the foaming material is about to reach a soft sealing area, the sealing is finished by the first soft sealing structure; in order to ensure accurate clamping positions of the left and right side grids, the grid clamping surfaces are made into a mold for injection molding, so that when foaming, masking paper is required to be adhered to the grids for sealing, and after foaming is finished, the masking paper is removed through milling.
In addition, the whole foaming region is foamed by using a closed mold, and as shown in FIG. 8, the size d2 of the foaming material pouring opening 13 is aboutIn this embodiment, a cross rib with a thickness of about 2.0mm is formed in the middle of the pouring gate of the foaming material to divide the pouring gate, so that impact force and more sizing material coming out of the pouring gate are avoided, and impact printing is caused on the slush molding surface A12. In order to prevent glue leakage at the positions of the pouring head of the die and the pouring opening of the foaming material, sealing foam is added at the position of the pouring opening; and cutting off the technological edge of the instrument board body framework 1 and the slush molding surface skin 2 in a milling mode after foaming is finished.
As described above, the soft sealing structure and the hard sealing structure are skillfully combined, and the instrument panel manufactured by the slush molding foaming process of the embodiment has thicker foaming thickness, so that the instrument panel has soft and comfortable hand feeling; meanwhile, the sealing structure can effectively ensure the continuity of integral foaming, avoid the problems of wrinkling, hollowing, collapse, glue leakage and the like, adopt closed-die foaming in a foaming area, have larger design freedom degree compared with the appearance design of an open-die pouring process, can realize multi-position back-off molding, have no stress processing process, are not easy to crack and then have no seam, have uniform and attractive integral dermatoglyph, and can effectively improve the molding quality of the product after slush molding foaming molding so as to greatly improve the integral quality.
Example two
The second embodiment is substantially the same as the first embodiment except that: as shown in fig. 1 to 4, this embodiment provides a slush molding foaming sealing structure for an instrument panel, and on the basis of the first embodiment, this embodiment is further provided with a second soft sealing structure, a third soft sealing structure and a second hard sealing structure; specifically, the second hard sealing structure is arranged in the A column areas 11 on the two sides of the instrument panel body framework 1 and the slush molding surface skin 2, that is to say, the areas a-n and c-d in the embodiment are hard sealed; the second hard sealing structure is preferably the same as the first hard sealing structure, and the hard sealing ribs 9 are arranged on the instrument board body skeleton 1 for hard sealing, the thickness t2 of the top end of each hard sealing rib 9 close to the slush molding surface skin 2 is 1.0-2.0mm, the thickness t3 of the root part of each hard sealing rib 9 mounted on the instrument board body skeleton 1 is determined according to the angle of the mold, and the distance h2 between the slush molding surface skin A surface 12 and the sealing ribs is about 0.3mm.
In this embodiment, second soft sealing structures are arranged at the two side ends of the instrument board body skeleton 1 and the slush molding surface skin 2, that is, the d-e, m-n regions in fig. 1 of this embodiment are soft sealed, where the second soft sealing structures include the inflatable hose 4 and the bolt in the first embodiment; further, in order to prevent bad foaming at the soft and hard sealing combination position, a gradual transition structure 10 is arranged at the position of the gas-filled joint of the instrument panel body framework 1 and the slush molding surface skin 2; referring to fig. 7, the length L2 of the transition structure 10 of the gradual change surface along the gradual change region of the foaming layer 3 is greater than or equal to 20mm, and as a preferred scheme of the transition structure 10 of the gradual change surface, the angle ψ of the transition structure 10 of the gradual change surface is about 15 °, and the angle R2 of the gradual change surface is about R30mm; the design of the bolt composition structure and the transition structure 10 of the gradual change surface is combined, and the sealing treatment can be carried out in a mode of sticking a sponge strip so as to ensure that the local position glue leakage condition can not exist during foaming.
The third soft sealing structure provided in this embodiment is disposed at the rear ends of the instrument panel body skeleton 1 and the slush molding skin 2, that is, in this embodiment, the f-g, j-k regions in fig. 1 are soft sealing, and the third soft sealing structure in this embodiment is the same as the second soft sealing structure, and includes the inflatable hose 4 and the plug pin composition structure in the first embodiment, and the gradual transition region between the hard sealing structure and the soft sealing structure is provided with the gradual transition structure 10 as shown in fig. 7, so that the description is omitted.
On the other hand, the embodiment also provides a foaming process for performing slush molding foaming by using the instrument panel slush molding foaming sealing structure, wherein the foaming process comprises the following process steps:
The instrument board body framework 1 is formed through an injection mold, and the thickness of the instrument board body framework 1 is 2.5mm; the slush molding surface skin 2 is molded by a slush molding die; the thickness of the slush molding surface skin 2 is 0.8mm, and the molding R angle R of the slush molding surface skin 2 is approximately equal to 1.5mm; the foaming layer 3 is formed by a foaming mould, the thickness of the foaming layer 3 is 4mm, in the foaming process, the first hard sealing structure and the second hard sealing structure complete sealing, and when the foaming material is about to reach a soft sealing area, the first soft sealing structure, the second soft sealing structure and the third soft sealing structure complete sealing; in order to ensure accurate clamping positions of the left and right side grids, the grid clamping surfaces are made into a mold for injection molding, so that when foaming, masking paper is required to be adhered to the grids for sealing, and after foaming is finished, the masking paper is removed by milling; finally, after foaming and forming, the skin process edge is removed by a hand tearing mode, the skeleton process edge 8 is removed by a milling mode, the automation degree is high, and the labor cost can be greatly reduced.
In conclusion, the slush molding foaming instrument board adopts closed mold foaming, and adopts the smart combination of a soft sealing structure and a hard sealing structure; in the foaming process, the hard sealing structure is used for sealing firstly, and when the foaming material is about to reach the soft sealing area, the soft sealing structure is used for sealing, so that the whole foaming continuity can be effectively ensured, the problems of wrinkling, hollowing, collapse, glue leakage and the like are avoided, the molding quality of a product after slush molding foaming molding is improved, and the whole quality is greatly improved; meanwhile, different sealing structures and hard sealing structures are further arranged in different foaming areas, and a gradual transition surface transition structure 10 is arranged in a gradual transition area of the hard sealing structure and the soft sealing structure, so that the technical problem of poor foaming at the combining position of the soft sealing structure and the hard sealing structure can be effectively prevented, and the uniform and attractive appearance of the integral dermatoglyph of the product is ensured.
The thickness of the instrument board foaming piece manufactured by the slush molding foaming sealing structure is thicker and is generally 4-10mm, so that the instrument board foaming piece has soft and comfortable hand feeling; after foaming molding, the skin process edge is removed by a hand tearing mode, the skeleton process edge 8 is removed by a milling mode, the automation degree is high, the labor cost can be greatly reduced, and the method has good application prospect and popularization and application value in the technical field of instrument board slush molding design and manufacture and is suitable for popularization and application.
The specification and figures are to be regarded in an illustrative rather than a restrictive sense, and one skilled in the art, in light of the teachings of this invention, may make various substitutions and alterations to some of its features without the need for inventive faculty, all being within the scope of this invention.
Claims (6)
1. The utility model provides a instrument board slush molding foaming seal structure, includes instrument board body skeleton, slush molding epidermis and foaming layer, its characterized in that: the foaming area where the foaming layer is positioned adopts closed mould foaming and is provided with a foaming material pouring gate, and a first soft sealing structure is arranged at the front end areas of the instrument panel body framework and the slush molding epidermis; a first hard sealing structure is arranged at the rear end areas of the instrument panel body framework and the slush molding surface skin;
The first soft sealing structure comprises an inflation hose, the inflation hose is arranged in the front end area of the instrument board body framework and the slush molding surface skin, and when the foaming material is about to reach the soft sealing area, the inflation hose is used for inflating to complete soft sealing; the first soft sealing structure further comprises a bolt composition structure which is arranged on a frame process edge of a front end area where the instrument board body frame and the slush molding skin are positioned;
The first hard sealing structure comprises hard sealing ribs which are arranged on the instrument board body framework and have trapezoid cross sections, and the thickness of the hard sealing ribs close to the top end of the slush molding skin is smaller than the thickness of the root parts of the hard sealing ribs arranged on the instrument board body framework;
The tail ends of the two sides of the instrument board body framework and the slush molding surface are provided with second soft sealing structures, and the tail ends of the rear ends of the instrument board body framework and the slush molding surface are provided with third soft sealing structures; the second soft sealing structure and the third soft sealing structure comprise structures consisting of the inflatable hose and the bolt, and a gradual transition structure is arranged at the position of an inflatable joint between the instrument panel body framework and the slush molding surface;
And second hard sealing structures are arranged in the column A areas on the two sides of the instrument board body framework and the slush molding epidermis, and the second hard sealing structures are identical to the first hard sealing structures.
2. The instrument panel slush molding foaming sealing structure according to claim 1, wherein: the bolt composition structure comprises at least four bolt structures, and the distance L1 between every two adjacent bolt structures is 260-300mm.
3. The instrument panel slush molding foaming sealing structure according to claim 2, wherein: the front end of the bolt structure is provided with a guide bevel angle beta, and the guide bevel angle beta is 15-20 degrees.
4. The instrument panel slush molding foaming sealing structure according to claim 1, wherein: the length L2 of the transition structure of the gradual change surface along the gradual change area of the foaming layer is more than or equal to 20mm.
5. A foaming process characterized by: slush molding foaming using the instrument panel slush molding foaming sealing structure according to any one of claims 1 to 4, said foaming process comprising the process steps of:
The instrument board body skeleton is formed through an injection mold, the slush molding surface skin is formed through a slush molding mold, the foaming layer is formed through a foaming mold, in the foaming process, the hard sealing structure is used for sealing, and when the foaming material is about to reach a soft sealing area, the soft sealing structure is used for sealing.
6. The foaming process of claim 5, wherein: and cutting off the technological edge of the instrument board body framework and the slush molding surface skin in a milling mode after foaming is finished.
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| JP2000317955A (en) * | 1999-05-17 | 2000-11-21 | Calsonic Kansei Corp | Instrument panel and its manufacture |
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| JP2018140674A (en) * | 2017-02-27 | 2018-09-13 | ダイキョーニシカワ株式会社 | Vehicle interior component and manufacturing method of the same |
| CN110370527A (en) * | 2019-08-13 | 2019-10-25 | 辽宁金兴汽车内饰有限公司 | Foamed instrument panel peripheral sealing technique |
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| JP2000317955A (en) * | 1999-05-17 | 2000-11-21 | Calsonic Kansei Corp | Instrument panel and its manufacture |
| JP2003080971A (en) * | 2001-09-14 | 2003-03-19 | Inoac Corp | Vehicle interior trim member and manufacturing method of the same |
| EP3115171A1 (en) * | 2015-07-09 | 2017-01-11 | KraussMaffei Technologies GmbH | Foaming mould with extendable sealing end piece |
| JP2018140674A (en) * | 2017-02-27 | 2018-09-13 | ダイキョーニシカワ株式会社 | Vehicle interior component and manufacturing method of the same |
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Country or region after: China Address after: 610100 Aerospace North Road, Longquanyi District, Sichuan, Chengdu Applicant after: Chengdu Aerospace Molding Co.,Ltd. Address before: 610100 Aerospace North Road, Longquanyi District, Sichuan, Chengdu Applicant before: CHENGDU SPACE MOULD AND PLASTIC Co.,Ltd. Country or region before: China |
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