CN1175528A

CN1175528A - Manufacturing method of automobile steering wheel

Info

Publication number: CN1175528A
Application number: CN96109098A
Authority: CN
Inventors: 林权树; 李秀峰
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-08-29
Filing date: 1996-08-29
Publication date: 1998-03-11
Anticipated expiration: 2016-08-29
Also published as: CN1056120C

Abstract

A technology for manufacturing the steering wheel of car includes such steps as proportionally mixing formalin, urea, melamine and ammonia water, preparing adhesive at proper temp, breaking waste wood, grinding to become fine fibres, removing dust, adding adhesive, mixing, loading the raw material in powder tank of steering wheel (1/2), loading it in skeleton of steering wheel, loading it in another 1/2 raw material, slightly pressurizing, loading it in mould, removing powder tank, heating and pressurizing, demoulding, loading the raw materials in mould, heating and pressurizing, cooling and demoulding.

Description

The manufacture method of vehicle steering

The present invention relates to the manufacture method of the wooden automobile steering wheel of vehicle control linkage part in a kind of traffic and transport field, particularly relate to a kind of vehicle steering that former wood surface coats hose lining wood raw material and skeleton that can be made into, have splendid robustness and aesthetic appearance, and have the manufacture method of the vehicle steering of industrial utilization.

Wooden automobile steering wheel has the comfortable characteristic of the careful gripping of texture, and also has not advantages such as moisture-sensitive, comparatively firm, safety in utilization height and generally be subjected to driving the hobby that makes personnel on quality; Yet no matter the wooden automobile steering wheel to know in the past is the obtaining or in the use of reality, visible defects and inconvenience are all arranged, and be difficult to perfect all the time of manufacturing, timber at bearing circle.

With the log vehicle steering is example, use the bearing circle of log machine-shaping, must obtain former timber with the price of costliness, cut required shape with manual again, comprise also that wherein the bearing circle surface is for the curved arc of finger grip, the thin portion processing of curved surface etc., therefore make that the price of finished product is high, but not be that general popular institute can accept.

Reduce one of mode of log vehicle steering manufacturing cost, be to use bent wood to reel, bind the bearing circle of moulding; The manufacture method of this kind bearing circle is to utilize the Qu Muwei raw material, and the type of being wound into is upper and lower cooresponding halved body respectively, with bonding agent upper and lower halved body is binded and the formation bearing circle behind middle clamping Y shape frame again; Though this bearing circle has inexpensive advantage, but generally speaking, recessed on the bearing circle surface, protruding thin portion processing aspect, be subject to bent wood raw material and still very inconvenience, this makes it be difficult in appearance reach soft, the aesthetic of mellow and full and streamline, and in different dry, the wet area use big with temperature traverse, also cause be full of cracks easily, modification, moreover, because of bearing circle is above, down cooresponding halved body binds, its bond area is easy to form the gap on bearing circle surface, especially through after using for a long time, the chemical change of bonding agent, or have the matter between any central Y type frame and Qu Mu poor, all can cause the mechanism of bearing circle to become flexible and intensity reduction or the like variation phenomenon, and form the misgivings on the safety.

Because the defective of above-mentioned traditional log bearing circle, the inventor is based on abundant practical experience and expertise, through constantly research, design, and through the repeated multiple times pilot sample and after improving, finally create the present invention, make it can be, make that structure is more solid, outward appearance is more careful Yu have wooden bearing circle safer in high texture, the use, and have the usability of industry with inexpensive raw material.

Main purpose of the present invention is, overcome the deficiencies in the prior art, and provide a kind of manufacture method of vehicle steering, make it with the jelly that special formulation is made, be mixed in the waste wood fiber and make bakelite raw material, in the powder groove, add center framework again, make the embryo product, coat the log thin slice at outside face again,, and can make bearing circle with splendid robustness and aesthetic appearance with the mould pressurization of heating.

Of the present invention time a purpose is, a kind of manufacture method of vehicle steering is provided, and makes it use inexpensive wood chip to be one of raw material in processing procedure, cooperates the inner skeleton of joint cement and bearing circle one-body molded, and can obtain robust bearing circle finished product.

Another object of the present invention is to, a kind of manufacture method of vehicle steering is provided, make its cotton of in processing procedure, handling, form the top layer raw material of bearing circle, and can obtain to have the outward appearance of former wood grain shape and the bearing circle finished product of excellent in toughness with multilayer log thin slice and impregnation.

A further object of the present invention is, a kind of manufacture method of gas car bearing circle is provided, and it is pressurizeed the bearing circle moulding with mould in processing procedure, and can make the soft mellow and full bearing circle finished product in careful, the concavo-convex position of moulding.

The objective of the invention is to realize by following technical scheme.A kind of manufacture method of vehicle steering, it is that jelly with proper proportion is mixed in wood chip, after stirring 30-40 minute, form bakelite raw material, with the metallic framework of this bakelite raw material together with a bearing circle, insert pressurization a little in the powder groove, make bakelite raw material be coated on metallic framework, again this powder groove is inverted in the mould, gets powder output slot, through the mold pressing processing procedure of the pressurization of heating for the first time, and make bearing circle embryo product, after moving back mould taking-up embryo product, in mould, insert, following two top layer raw materials and embryo product, mold pressing processing procedure again through heating for the second time and pressurizeing, after the cooling demoulding, promptly obtain the vehicle steering that log top layer raw material coats hose lining wood raw material and metallic framework.

Purpose of the present invention can also further realize by following technical measures.The manufacture method of aforesaid vehicle steering, wherein said jelly is meant by material compositions such as formalin, urea, melamine, ammoniacal liquor, modulation forms in advance under 80 ℃ of proper temperatures, and its raw material and proportion of composing are: formalin 69%, urea 15%, melamine 10%, ammoniacal liquor 6%.The manufacture method of aforesaid vehicle steering, wherein said wood chip, it is to smash and grind to form fine fibre with scoot, obtains required wood chip after removing dust; Or, use other plant bars footpath with elongated fibers, replace scoot, it is smashed, grinds to form fine fibre, remove resulting wood chip behind the dust.The manufacture method of aforesaid vehicle steering, wherein said bakelite raw material is to use the wood chip of 35Kg, mixes the jelly of 9Kg, makes through stirring 30-40 minute.The manufacture method of aforesaid vehicle steering, wherein said powder groove, it comprises by a housing wall, an inside casing wall and forming, the connecting panel that is provided with plural number between the two is located, between two frame walls, form in order to install the space of bakelite raw material and metallic framework, the bottom of powder groove is provided with a heelpiece, and the wall of inside casing wall is provided with groove, in order to insert the spider of metallic framework.The manufacture method of aforesaid vehicle steering, the processing procedure of wherein said powder groove, be that bakelite raw material is inserted about 1/2 capacity in this powder groove, placing direction dish metallic framework again, inserting in addition again, 1/2 bakelite raw material is covered with the powder groove, after slightly pressurization makes it closely, metallic framework is coated on the inside of bakelite raw material.The manufacture method of aforesaid vehicle steering, wherein said mould, comprise a bed die and a patrix, be positioned at the contact surface of this bed die and patrix, being respectively equipped with can be for the die cavity that installs bearing circle, be positioned at the center of die cavity, position corresponding to set screw on the spider in the middle of the metallic framework, be respectively equipped with at least two pin-and-holes, in order to plug two latches, when patrix T presses and contact bed die, just can be with the two ends up and down of this two latch, insert respectively in the pairing pin-and-hole of patrix and bed die center, form the locating point of fixing metal skeleton in the mold pressing processing procedure.The manufacture method of aforesaid vehicle steering, the processing procedure of the wherein said mold pressing first time is with 140-150 ℃ of the patrix of mould and bed die design temperature, oil press pressure 150P, the pressure release after 8 minutes of pressurizeing, and obtain the embryo product of bearing circle.The manufacture method of aforesaid vehicle steering, wherein said top layer raw material, comprise at least three layers of straight burr veneer after surface-coated jelly is handled, at least one deck band veneer, with stacked the forming of one deck cotton layer, when stacked, earlier bind mutually, glutinously in the bottom in regular turn establish one deck band veneer, glutinously again establish one deck straight burr veneer, be the contact surface of bearing circle again with one deck cotton layer at last with two-layer straight burr veneer, and the top layer raw material of making.The manufacture method of aforesaid vehicle steering, wherein said secondary mold pressing processing procedure, it is the die cavity of the top layer raw material upwards being inserted bed die with cotton layer, put this bearing circle embryo product again, again that another top layer raw material is downward with cotton layer at last, be positioned over the upper end of bearing circle embryo product, with 140-150 ℃ of the patrix of mould and bed die design temperature, oil press pressure is set at 150P, the pressure release after five minutes of pressurizeing, after the cooling demoulding, promptly obtain coating the vehicle steering finished product of hose lining wood raw material and metallic framework by former wood surface.

The present invention compared with prior art has tangible advantage and good effect.By above technical scheme as can be known, it mainly is with raw material compositions such as the formalin of proper proportion, urea, melamine, ammoniacal liquor for the present invention, is modulated into jelly under proper temperature in advance; Scoot through smashing and grind to form fine fibre, is removed and added this jelly behind the dust and mix and form bakelite raw material; With about 1/2 capacity in the bakelite raw material placing direction dish powder groove, placing direction dish skeleton is inserted other 1/2 bakelite raw material again and is covered with the powder groove again, slightly after the pressurization, this powder groove is inverted in the mould, gets powder output slot, make the bearing circle raw material heat pressurization and be shaped to bearing circle embryo product through mould; Move back after mould takes out these embryo product, in mould, insert upper and lower two top layer raw materials and insert the embryo product again,, after the cooling demoulding, obtain the vehicle steering that former wood surface coats hose lining wood raw material and metallic framework through the pressurization of heating.It is mixed in the waste wood fiber and makes bakelite raw material with the jelly that special formulation is made, and adds center framework again in the powder groove, make the embryo product, coat the log thin slice at outside face again,, and can be made into bearing circle with splendid robustness and aesthetic appearance with the mould pressurization of heating; It uses inexpensive wood chip to be one of raw material in processing procedure, cooperates the inner skeleton of joint cement and bearing circle one-body molded, and can obtain robust bearing circle finished product; The cotton that it is handled with multilayer log thin slice and impregnation in processing procedure forms the top layer raw material of bearing circle, and can obtain to have the outward appearance of former wood grain shape and the bearing circle finished product of excellent in toughness; It pressurizes the bearing circle moulding with mould in processing procedure, and can make the soft mellow and full bearing circle finished product in careful, the concavo-convex position of moulding.

In sum, the present invention can be made into the vehicle steering that former wood surface coats hose lining wood raw material and skeleton, have splendid robustness and aesthetic appearance, truly have the value of industry, and has substantial practicality, no matter it structurally or all have on the effect significantly and to improve, really is a new and innovative, progressive, practical new design.

Concrete manufacture method of the present invention and structure thereof are provided in detail by following examples and accompanying drawing thereof.

Fig. 1 is a manufacturing process block scheme of the present invention.

Fig. 2 is employed powder groove and a skeleton structure block diagram in the manufacturing process of the present invention.

Fig. 3 is the STRUCTURE DECOMPOSITION block diagram of employed top layer raw material in the manufacturing process of the present invention.

Fig. 4 is the exploded perspective view of employed mould and bearing circle embryo product in the manufacturing process of the present invention.

Fig. 5 is an employed die cut view in the manufacturing process of the present invention.

Below in conjunction with accompanying drawing and preferred embodiment, its concrete grammar of manufacture method, architectural feature and the effect thereof of the vehicle steering that foundation the present invention is proposed, describe in detail as after.

See also shown in Figure 1, the manufacture method of vehicle steering of the present invention, its manufacturing process is: use the jelly 10 through special formulation, be mixed in wood chip 11 with proper proportion, form bakelite raw material 12 after stirring 30-40 minute; With the metal bin 50 of this bakelite raw material 12 together with a bearing circle, insert pressurization a little in the powder groove 20, make bakelite raw material 12 be coated on metallic framework 50; Again this powder groove 20 is inverted in mould 30, get powder output slot 20, through the pressurization of heating for the first time, and make bearing circle embryo product 13, after moving back mould taking-up embryo product 13, in mould 30, insert upper and lower two top layer raw materials 40 and embryo product 13, through the pressurization of heating for the second time, after the cooling demoulding, the top layer raw material 40 that can obtain log coats the bakelite raw material 12 of internal layer and the vehicle steering of metallic framework 50.

Employed jelly 10 in the above-mentioned manufacturing process is meant by material compositions such as formalin, urea, melamine, ammoniacal liquor, and modulation forms in advance under 80 ℃ of proper temperatures, and its raw material and proportion of composing are:

Formalin 69%

Urea 15%

Melamine 10%

Ammoniacal liquor 6% is through the jelly 10 that forms of modulation in advance, can be used for being mixed in wood chip 11 forming required bakelite raw material 12, and, can be used for each the veneer lamella of bearing circle top layer raw material 40 and the bonding moulding of cotton layer.

Aforesaid wood chip 11 is to smash and grind to form fine fibre with scoot, obtains required wood chip 11 after removing dust; Or, use other plant bars footpath with elongated fibers, replace scoot, it is smashed, grinds to form fine fibre, also can obtain required wood chip 11 after removing dust.

Aforesaid bakelite raw material 12 is to use the wood chip 11 of 35Kg, mixes the jelly of 9Kg, make through stirring, through mix stir after, make this bakelite raw material 12 have stickiness, cooperate the metallic framework 50 of bearing circle to carry out the manufacturing process of next powder groove again.

See also shown in Figure 2ly, powder groove manufacturing process of the present invention is to utilize the powder groove 20 shown in the figure, and metallic framework 50 is coated in the bakelite raw material 12; This powder groove 20, it comprises by a housing wall 21, an inside casing wall 22, the connecting panel 23 that is provided with plural number between the two is located, make and form between two housing walls 21, the inside casing wall 22 in order to install the space of bakelite raw material 12 and metallic framework 50, the bottom of powder groove 20 is provided with a heelpiece 24, leak downwards in order to the bakelite raw material 12 in the backstop powder groove 20, the wall of inside casing wall 22 is provided with groove 25, in order to the spider 51 of inserting metallic framework 50.

This metallic framework 50, comprise spider 51 by a Y shape in the housing of solid circles and the frame, moulding between the two is connected as a single entity, the centre of spider 51 is provided with some screws 52, this screw 52 is in order to handle lock is fixed on the car body when the mounting direction dish, in manufacturing process of the present invention, then can borrow this screw 52 as the required locating point of aftermentioned mold pressing processing procedure.

With aforesaid bakelite raw material 12, insert in this powder groove 20 about 1/2 capacity in the space between two housing walls 21, the inside casing wall 22, the metallic framework 50 of placing direction dish again, inserting in addition again, 1/2 bakelite raw material 12 is covered with powder groove 20, after slightly pressurization makes it closely, even this metallic framework 50 is coated on the inside of bakelite raw material 12, and the manufacturing process that can carry out next mold pressing.

See also Fig. 4, shown in Figure 5, the mold pressing processing procedure of the pressurization of heating the first time of the present invention, with the mold pressing processing procedure of the pressurization of heating for the second time, all be to utilize the mould 30 shown in the figure, the bakelite raw material 12 that makes above-mentioned inside have metallic framework 50 becomes the bearing circle finished product; This mould 30, comprise a bed die 31 and patrix 32, be positioned at the contact surface of this bed die 31 and patrix 32, being respectively equipped with can be for the die cavity 33 that installs bearing circle, be positioned at the center of die cavity 33, position corresponding to set spiral shell 52 on the spider 51 in the middle of the metallic framework 50, be respectively equipped with at least two pin-and-holes 34, in order to plug two latches 35, when patrix 32 presses down and contacts bed die 31, just can make the two ends up and down of this two latch 35, insert patrix 32 and the pairing pin-and-holes 34 in bed die 31 centers interior (as shown in Figure 5) respectively, whereby as the locating point of fixing metal skeleton 50, so that metallic framework 50 and the outside bakelite raw material 12 that coats thereof can be positioned at the correct position of die cavity 33.

The processing procedure of mold pressing for the first time is: with above-mentioned powder groove 20, together with the bakelite raw material 12 of clad metal skeleton 50, be inverted in bed die 31 as shown in Figure 4 on the bed die 31 of mould 30 jointly); At this moment, aforementioned at least two latches 35 have been inserted in the pin-and-hole 34, be inverted in the action, need two screws, 52 correspondences in the middle of the metallic framework 50 in the powder groove 20 are sheathed on this two latch 35, after the inversion, take off powder groove 20, even the bakelite raw material 12 of clad metal skeleton 50 is positioned at the correct position of die cavity 33; With the patrix 32 of mould 30 with bed die 31 design temperature 140-150 ℃, oil press pressure 150P, the pressure release after 8 minutes of pressurizeing, and obtain the embryo product 13 of bearing circle.

After moving back mould taking-up embryo product 13, in same mould 30, cooperate the upper and lower side of these embryo product 13 to insert upper and lower two top layer raw materials 40 respectively, carry out mold pressing second time processing procedure again.

This top layer raw material 40, as shown in Figure 3, it comprise at least three layers of straight burr veneer 41 after surface-coated jelly 10 is handled, at least one deck band veneer 42, with 43 stacked forming of one deck cotton layer; In order to cooperate the shape of bearing circle, respectively this single-layer wood veneer and cotton layer are before cloth glue is stacked, the shape that has circular hole in the middle of being cut in advance, when stacked, earlier with two-layer straight burr veneer 41 binds mutually, in regular turn in the bottom glutinous establish one deck band veneer 42, more glutinous establish one deck straight burr veneer 41, last be the contact surface of bearing circle with one deck cotton layer 43 again, and finish the manufacturing of top layer raw material 40.

As shown in Figure 4, the mold pressing processing procedure of pressurization of heating for the second time is: earlier with this top layer raw material 40 with cotton layer 43 upwards (with the embryo product of contact bearing circle) insert the die cavity 33 of bed die 31, put the embryo product 13 of this bearing circle again, at last again with another top layer raw material 40 with cotton layer 43 (with the embryo product of contact bearing circle) downwards, place the upper end of the embryo product 13 of bearing circle; In the action of the embryo product 13 of placement direction dish, same need are two screws 52 on these embryo product 13 middle triangle framves, and correspondence is sheathed on two latches 35 in the middle of the mould 30, so that the embryo product 13 of bearing circle can be positioned at the correct position of die cavity 33; Is 140-150 ℃ with the patrix 32 of mould 30 with bed die 31 design temperatures, and oil press pressure is 150P, and the pressure release after five minutes of pressurizeing after the cooling demoulding, promptly obtains being coated by former wood surface the vehicle steering finished product 14 of hose lining wood raw material 12 and metallic framework 50.

The straight burr veneer 41 of above-mentioned top layer raw material 40, band veneer 42 are to use the English walnut wood chip or are printed on the printing paper of natural timber lines; Because of top layer raw material 40 is interval iterative structures by straight burr veneer 41, band veneer 42 and the jelly 10 of aforementioned multilayer, be provided with cotton layer 43 at the bottom again with toughness, when mold pressing is operated, be subjected to the compacting of die cavity 33 indent convex globoidal shapes also can not cause the surface of bearing circle to produce slight crack, after the pressure treatment, can make the surface of bearing circle have good toughness, be metallic framework 50 because of its inside again, and make the bearing circle finished product have the temperature tolerance on splendid intensity and surface, and make the surface of bearing circle manifest the texture of log.

It is obtained easily because of wood chip 11, and the wood glue material forming is cheap than log, so can cost-cutting; Moreover, the thin portion shape on bearing circle surface, for example finger recess, dynamopathic curved surface, cambered surface etc., all can be during fabrication by mould 30 prior design decisions, and with the press moulding mode one-shot forming, thereby simplified the semi-finished procedure for processing of bearing circle, and can look the needs of order, make the various not bearing circle of same attitude.

In addition, the one of wood skin and 50 moulding of the complete clad metal skeleton of wood chip, because of bakelite raw material 12 heat the pressurization after degree of uniformity good, make the quality and the intensity of bearing circle very average, stable after the extrusion forming, the sealing pressurization of wood chip top layer, cooperate the internal layer wood chip and have do not chap, modification not, can adapt to the big area use of different aridity, humidity and temperature traverse, and can guarantee the stable of its intensity and function all the time, and can improve the safety of use.

The above, it only is preferred embodiment of the present invention, be not that the present invention is imposed any restrictions, every foundation technical spirit of the present invention changes any simple modification, change and the equivalent structure that above embodiment did, and all still belongs in the scope of technical solution of the present invention.

Claims

1, a kind of manufacture method of vehicle steering, it is characterized in that: the jelly with proper proportion is mixed in wood chip, after stirring 30-40 minute, form bakelite raw material, with the metallic framework of this bakelite raw material together with a bearing circle, insert pressurization a little in the powder groove, make bakelite raw material be coated on metallic framework, again this powder groove is inverted in the mould, get powder output slot, mold pressing processing procedure through the pressurization of heating for the first time, and make bearing circle embryo product, after moving back mould taking-up embryo product, in mould, insert, following two top layer raw materials and embryo product, mold pressing processing procedure again through heating for the second time and pressurizeing, after the cooling demoulding, promptly obtain the vehicle steering that log top layer raw material coats hose lining wood raw material and metallic framework.

2, the manufacture method of vehicle steering according to claim 1, it is characterized in that wherein said jelly, be meant that by material compositions such as formalin, urea, melamine, ammoniacal liquor modulation forms in advance under 80 ℃ of proper temperatures, its raw material and proportion of composing are:

Formalin 69%

Urea 15%

Melamine 10%

Ammoniacal liquor 6%.

3, the manufacture method of vehicle steering according to claim 1 is characterized in that wherein said wood chip, is to smash and grind to form fine fibre with scoot, obtains required wood chip after removing dust; Or, use other plant bars footpath with elongated fibers, replace scoot, it is smashed, grinds to form fine fibre, remove resulting wood chip behind the dust.

4, the manufacture method of vehicle steering according to claim 1 is characterized in that wherein said bakelite raw material, is to use the wood chip of 35Kg, mixes the jelly of 9Kg, makes through stirring 30-40 minute.

5, the manufacture method of vehicle steering according to claim 1, it is characterized in that wherein said powder groove, comprise by a housing wall, an inside casing wall and forming, the connecting panel that is provided with plural number between the two is located, between two frame walls, form in order to install the space of bakelite raw material and metallic framework, the bottom of powder groove is provided with a heelpiece, and the wall of inside casing wall is provided with groove, in order to insert the spider of metallic framework.

6, the manufacture method of vehicle steering according to claim 1, the processing procedure that it is characterized in that wherein said powder groove, be that bakelite raw material is inserted about 1/2 capacity in this powder groove, the metallic framework of placing direction dish again, inserting in addition again, 1/2 bakelite raw material is covered with the powder groove, after slightly pressurization makes it closely, metallic framework is coated on the inside of bakelite raw material.

7, the manufacture method of vehicle steering according to claim 1, it is characterized in that wherein said mould, it comprises a bed die and a patrix, be positioned at the contact surface of this bed die and patrix, being respectively equipped with can be for the die cavity that installs bearing circle, be positioned at the center of die cavity, position corresponding to set screw on the spider in the middle of the metallic framework, be respectively equipped with at least two pin-and-holes, in order to plug two latches, when patrix presses down and contact bed die, just can be with the two ends up and down of this two latch, insert respectively in the pairing pin-and-hole of patrix and bed die center, form the locating point of fixing metal skeleton in the mold pressing processing procedure.

8, the manufacture method of vehicle steering according to claim 1, the processing procedure that it is characterized in that the wherein said mold pressing first time is with 140-150 ℃ of the patrix of mould and bed die design temperature, oil press pressure 150P, the pressure release after 8 minutes of pressurizeing, and obtain the embryo product of bearing circle.

9, the manufacture method of vehicle steering according to claim 1, it is characterized in that wherein said top layer raw material, it comprise at least three layers of straight burr veneer after surface-coated jelly is handled, at least one deck band veneer, with stacked the forming of one deck cotton layer, when stacked, earlier bind mutually, glutinously in the bottom in regular turn establish one deck band veneer, glutinously again establish one deck straight burr veneer, be the contact surface of bearing circle again with one deck cotton layer at last with two-layer straight burr veneer, and the top layer raw material of making.

10, manufacture method according to the described vehicle steering of the arbitrary claim of claim 1 to 9, it is characterized in that wherein said secondary mold pressing processing procedure, it is the die cavity of the top layer raw material upwards being inserted bed die with cotton layer, put this bearing circle embryo product again, again that another top layer raw material is downward with cotton layer at last, be positioned over the upper end of bearing circle embryo product, with 140-150 ℃ of the patrix of mould and bed die design temperature, oil press pressure is set at 150P, the pressure release after five minutes of pressurizeing, after the cooling demoulding, promptly obtain coating the vehicle steering finished product of hose lining wood raw material and metallic framework by former wood surface.