CN1226158C

CN1226158C - Wood grain steering wheel for car and its making method

Info

Publication number: CN1226158C
Application number: CN 03119579
Authority: CN
Inventors: 李荣彩; 李基何
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-03-08
Filing date: 2003-03-10
Publication date: 2005-11-09
Anticipated expiration: 2023-03-10
Also published as: CN1443630A

Abstract

The present invention discloses a locally woodgrain film plastic moulding steering wheel for vehicle and its making method. In particular, the invention relates to a steering wheel exhibiting excellent sense of touch due to that a non-foaming polyurethane resin is used for integrally moulding and woodgrain films are plastic moulded locally, and a manufacturing method thereof by a technics of moulding the resin part of woodgrain films plastic moulded utilizing a non-foaming polyurethane resin to improve the adhesive characteristic of woodgrain films. Said manufacturing method of steering wheels for vehicle comprises the following six steps: 1, mixing raw materials; 2, installing a steering wheel between up and down metal dies which are connected to each other to prepare for a non-foaming moulding; 3, injecting the mixed raw materials to mould the non-foaming polyurethane resin and taking product out; 4, removing burr on the product and performs a cleaning; 5, drying and rubbing surfaces to remove pores; and 6, filling surface pores, drying and rubbing surfaces to remove pores again.

Description

Wood grain steering wheel for car and manufacture method thereof

Technical field

The present invention relates to handwheel for vehicle and the manufacture method thereof of a kind of part by the casting of grained film plastic.It is one-body molded and mould and be cast with the grained film with non-foamed polyurethane (Polyurethane) resin particularly to relate to a kind of part, it is one-body molded that thereby the resin that has the handwheel for vehicle of good woodiness touch and utilize non-foamed polyurethane resin that the grained film plastic is cast partly carries out, and makes the manufacture method of vehicle steering to improve the adhesive process of film.

Background technology

Vehicle steering is a handlebar of adjusting the automotive operation direction, and the driver often is held in the hand rotation.General operating needs is: hand is non-slip when rotating vehicle steering, and touch perception is good, has the outward appearance of beautiful aesthetic feeling.Recently, people have a preference for when traffic accident takes place the vehicle steering to the less band resiliency of person ram ratio.

Therefore, bearing circle in recent years, nested foamed polyurethane resin on the circular metal framework usually, in when, to alleviate traffic accident taking place to the impact of the person.Though this kind bearing circle has the effect and the skidproof advantage of buffering, the outward appearance dullness, feel is relatively poor, so usually in use in its outside, overlap a handle protecting sleeve in addition.

Such taper knob though how much improved the dull and relatively poor shortcoming of feel of its outward appearance, has increased the thickness of rotating disk, makes the user not hold bearing circle safely steadily, has brought hidden danger to safe operation.

And, the bearing circle of luxury car during fabrication, its foamed polyurethane resin is thinner than the diameter of general car bearing circle, in its outside the leather sheath that becomes one with handle has been installed, though this has remedied the problems referred to above, after long-term use, adhere to stain on hand easily, and then skid when causing steering wheel rotation, and influence its aesthetic measure.

Recently, for the sense attractive in appearance, noble that increases vehicle and the good touch sense of bearing circle, the part of bearing circle nested leather sheath, and with mould casting foamed polyurethane resin-shaped and be integral.This by the synthetic bearing circle of the grained resin film that can show wood texture, on a part of luxury car, install and use.

But a this part has the bearing circle of grained resin film, is to use the polyurethane foaming to mould casting in the outside of metal frame to form.Because this part bearing circle is to mould casting at grade and be processed into graininess film, so can produce many pores in the polyurethane resin of foaming, this produces very big influence to the stickness of moulding the casting film, moulds the casting film after long-time and will be worn and come off using usually.

Summary of the invention

The objective of the invention is to solve the problem that above-mentioned located by prior art exists, handwheel for vehicle and the manufacture method thereof of a kind of part by the casting of grained film plastic are provided.Wood grain steering wheel for car of the present invention, it puts the bearing circle resin part of natural or artificial leather sheath, form by the making of foamed polyurethane resin, and the resin part of moulding casting grained film, form by non-foamed polyurethane resin making, thereby thoroughly improved the stickness of grained film, the wood grain steering wheel for car that produces has good woodiness touch.In addition, manufacture method according to wood grain steering wheel for car of the present invention, in the resin part of moulding casting grained film, with non-foamed polyurethane resin when one-body molded, in order to reduce the generation of bubble, and the timely discharge that guarantees bubble, and metal die is obliquely installed, and raw material is injected on past top from the bottom, thus make things convenient for bubble to discharge, reduce the formation of bubble, pore in the goods, thoroughly improved the stickness of grained film.

Description of drawings

Fig. 1 is that the part of wood grain steering wheel for car of the present invention is cut scheme drawing;

Fig. 2 is the cutaway view and the partial enlarged drawing thereof of wood grain steering wheel for car of the present invention;

Fig. 3 is the structural representation of the metal die that uses in the Fabrication procedure of the present invention;

Fig. 4 is the cutaway view of A-A direction among Fig. 3

Description of reference numerals:

1 spoke, 2 metal frames, 3 foamed polyurethane resins

4 leather sheaths, 5 grained films, 6 non-foamed polyurethane resins

7 inlets, 8 upper metal moulds, 9 lower metal moulds

10 discharge orifices, 100 bearing circle

The specific embodiment

Below will and be described further handwheel for vehicle of the present invention and manufacture method thereof in conjunction with the accompanying drawings with the specific embodiment.

Fig. 1, shown in Figure 2 according to the present invention, bearing circle 100 is to mould casting foamed polyurethane resin in circular metal framework 2 outsides that are connected with spoke 1, carry out the Combined Processing of natural or artificial leather sheath 4 and grained film 5 then on its top layer, and one-body molded at the resin forming position of moulding casting grained film 5 with non-foamed polyurethane resin 6.Its unique point is, puts the resin part of the bearing circle 100 of natural or artificial leather sheath 4, made forming by foamed polyurethane resin 3, and moulds the resin part of casting grained film 5, formed by non-foamed polyurethane resin 6 integral productions.

The bearing circle of the present invention 100 that constitutes like this, part are to mould casting by grained film 5 to form.Overlap the resin position of natural or artificial leather sheath 4, make moulding by foamed polyurethane resin 3, grained film 5 is moulded the resin position of casting, by non-foamed polyurethane resin 6 integral production moulding, so on vehicle steering 100, be formed with the part of grained film 5, have the natural wood sense.Resin part by non-foamed polyurethane resin 6 moulding, because of it does not add foaming agent when the synthesizing polyurethane, so foamed polyurethane resin 3 parts that foam with adding foaming agent are different, not only there is not resiliency, and because of material composition intensive, so do not have pore, have very strong hard rerum natura (hardness).

At this, hardness is the raw MAT'L by synthesizing polyurethane, as (MDI) the mixture ratio decision of (Diphenylmethane Diisocyanate) of polyol (Polyo1) and diphenylmethane diisocyanate salt (ester).Mixture ratio is the most key key element that is related to the steering dish, should choose the most appropriate, only mixture ratio when therefore making.

Make the resin forming part of the non-foamed polyurethane resin 6 of moulding in this way, have certain rigidity, can make its smooth surface, so just possessed rerum natura the same and texture with natural wood through polishing.After casting grained film 5 was moulded on its surface, the resin part that generates with foamed polyurethane resin 3 was different, because of it does not have pore, does not have resiliency, and smooth surface, so can fully positively realize the casting of moulding of this grained film 5.Because adhesive performance is good,, and can continue to keep original beautiful outward appearance so after once moulding casting, bearing circle this grained film 5 till using end can not be worn.

To shown in Figure 4, the manufacture method of vehicle steering of the present invention is as follows referring to Fig. 1:

The local making is formed with foamed polyurethane resin 3 on the circular metal framework 2 on the vehicle steering 100, and remainder uses non-foamed polyurethane resin 6 to make moulding.Concrete manufacture method comprises: first operation, polyol (Polyol) and diphenylmethane diisocyanate salt (ester) (MDI) are mixed according to 55% and 45% percentage by weight; Second operation, make upper mold 8 and lower mold 9 become 15 °-20 ° leaning angle with horizontal surface, so that inlet 7 be in by under the position, on this upper mold 8 and lower mold 9, be coated with one deck mold release then, so that goods come off easily, after two moulds are put, bearing circle 100 to be formed is installed on lower mold 9 from mould, at last upper mold 8 is combined with lower mold 9, in order to non-foaming; The 3rd operation, the inlet 7 from bevelled upper mold 8 bottoms injects the raw material that first operation is mixed, and makes non-foamed polyurethane resin 6 moulding, then mold 8 is separated with bed die 9, takes out the goods of moulding; The 4th operation is removed the burr (burr) be created on the goods, and with vapour degreasing machine cleaning article; The 5th operation remains in goods in-to-in bubble, pore in order to find out, and goods are packed in the drier, with about 90 ℃ temperature heating one hour, make air entrapment, pore cubic expansion, and outstanding or break from the surface, make smooth surface by grinding then; The 6th operation uses adhesives (bond) or butter to fill the pore and the little pin hole of exposing surface, and then lapped face, and reload in the drier, with about 90 ℃ temperature heating one hour, remove remaining pore once more, and lapped face makes its smooth surface.

Comprise the present invention of above-mentioned each operation, in order to form grained film graceful attractive in appearance on bearing circle 100 surfaces, utilize non-foamed polyurethane resin 6 moulding earlier, the casting of dough model thereon grained film 5 then.

Known to above-mentioned, characteristics of the present invention are on the forming process of non-foamed polyurethane resin 6.Describe its technological process below in detail.

In first operation that raw material mixes, have hardness and flexibility simultaneously, polyol (Polyol) and diphenylmethane diisocyanate salt (ester) (MDI) are mixed in 55% and 45% ratio respectively in order to guarantee it.

In second operation that non-foaming is prepared, its characteristics are to make upper mold 8 and lower mold 9 to have certain angle of inclination.Adopt the reason of non-foamed polyurethane resin 6 to be among the present invention,, can not make grained film 5 mould casting securely if use 3 of foamed polyurethane resins can produce numerous bubble or pore.In order to solve the above-mentioned shortcoming of foamed polyurethane resin 3, the present invention has selected non-foamed polyurethane resin 6 moulding for use; But when using non-foamed polyurethane resin 6, also can produce numerous air-bubble and pore,, thereby solve this problem so the present invention is designed to form with horizontal surface 15 °-20 ° leaning angle with upper mold 8 and lower mold 9.

In the 3rd operation, if inject mixed material from the inlet 7 of bevelled upper mold 8 bottoms, then bubble is because of the little upward movement very naturally of density, and the discharge orifice 10 from upper mold 8 is discharged, thus the pore that can reduce bubble effectively and produce because of this bubble.

Remove the 5th operation and the 6th operation of bubble, pore, it is the clearing process of establishing for the bubble of not removing fully in the operation of removing front, for residual bubble is discharged to the surface, these goods are encased in the drier, with about 90 ℃ temperature heating one hour, make the cubic expansion of air entrapment, pore, bubble, pore are outstanding or break to the surface.Then, lapped face, and,, thereby grained film 5 is moulded on the surface that casts from non-foamed polyurethane resin 6 well with the increase bond area with adhesives and butter filling sunk part.

As mentioned above, technology according to the present invention is on the surface of non-foamed polyurethane resin 6, and the general operation of moulding the manufacturing direction dish 100 of casting grained film 5 is as follows:

At first, handle the last slotted section of end, moulding position, as the processing corner, the finishing shape, and for the feel of the distal portion that makes leather sheath 4 and grained film 5 is fine and smooth more, and be processed into a bigger round edge; Then, on non-foamed polyurethane resin 6, mould casting grained film 5, moulding subsides seal coating (coating) wood texture on the surface that casts grained film 5, and on foamed polyurethane resin 3, adding cover leather sheath 4 at last.

According to manufacture method of the present invention, can on bearing circle 100, mould casting grained film 5 well, in use incrust to guarantee it, and improved the build guality and the serviceability of bearing circle.

Claims

1, a kind of wood grain steering wheel for car, it is characterized in that, mould the casting foaming polyurethane resin in the circular metal framework outside that is connected with spoke, and carry out natural or artificial leather sheath and wood grain film Combined Processing on the top layer of this urethane resin, wherein, on the surface of polyurathamc, form natural or artificial leather sheath, and on the surface of non-foaming polyurethane resin, cover the wood grain film.

2, a kind of manufacture method of wood grain steering wheel for car, it is characterized in that, the part of circular metal framework is to be shaped by foaming polyurethane resin, remainder is to be shaped by non-foaming polyurethane resin, described concrete operation comprises: first operation, mixed polyol and methyl diphenylene diisocyanate; Second operation, installation direction dish between upper mold and lower mold, and this upper mold and lower mold are connected in order to non-foaming and molding; The 3rd operation, the inlet injection mixed material from upper mold is shaped non-foaming polyurethane resin, takes out goods then; The 4th operation is removed the burr part that is created on the goods, utilizes vapour degreasing machine cleaning article then; The 5th operation, the goods drier of packing into, heat certain hour at a certain temperature after, remove steam vent by lapped face; The 6th operation utilizes adhesives or butter ST Stuffing Table to be exposed at the pore and the duck eye on surface, and then lapped face, and reloading in the drier, heat certain hour at a certain temperature after, carry out the secondary scavenging port.

3, as the manufacture method of wood grain steering wheel for car as described in the claim 2, it is characterized in that the polyol in described first operation and the weight ratio of methyl diphenylene diisocyanate are respectively mixed by 55% and 45%.

4, as the manufacture method of wood grain steering wheel for car as described in the claim 2, it is characterized in that, described upper mold and lower mold are horizontal by certain leaning angle, so that described inlet is positioned at by upper/lower positions, raw material is to inject by the inlet place of upper/lower positions from being positioned at the bevelled upper mold.

5, as the manufacture method of wood grain steering wheel for car as described in the claim 2, it is characterized in that, when in drying oven, goods being carried out drying, with about 90 ℃ temperature heating about hour.