KR102055964B1 - real wood product and manufacturing method thereof - Google Patents

real wood product and manufacturing method thereof Download PDF

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Publication number
KR102055964B1
KR102055964B1 KR1020150030149A KR20150030149A KR102055964B1 KR 102055964 B1 KR102055964 B1 KR 102055964B1 KR 1020150030149 A KR1020150030149 A KR 1020150030149A KR 20150030149 A KR20150030149 A KR 20150030149A KR 102055964 B1 KR102055964 B1 KR 102055964B1
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KR
South Korea
Prior art keywords
layer
wood
coating layer
injection molding
real
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KR1020150030149A
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Korean (ko)
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KR20160107439A (en
Inventor
김병혁
성기훈
강대인
Original Assignee
(주)엘지하우시스
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Priority to KR1020150030149A priority Critical patent/KR102055964B1/en
Publication of KR20160107439A publication Critical patent/KR20160107439A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/04—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B21/08—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/0012—Mechanical treatment, e.g. roughening, deforming, stretching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/0012—Mechanical treatment, e.g. roughening, deforming, stretching
    • B32B2038/0016—Abrading
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/406—Bright, glossy, shiny surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles
    • B32B2605/003—Interior finishings

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)

Abstract

According to the present invention, a low pressure urethane coating layer is preformed on the surface of a wood layer during the production of a real wood product, followed by post-forming a high pressure, tightly injected base material layer on the bottom of the wood layer, thereby cooling after molding. The present invention relates to a high-gloss real wood product and a method of manufacturing the same, which can prevent bending from occurring on a surface of a coating layer due to a difference in thermal stress distribution over time.
Real wood product manufacturing method according to the present invention for realizing this, the first step of forming a wood layer 110 of a predetermined shape by putting a wood (Wood) material in the press; A second step of first injection molding the coating layer 120 on one surface after inserting the molded wood layer 110 into an insert mold; And a third step of secondary injection molding the base layer 130 to have the coupling structure 131 with other components on the other surface of the wood layer 110, including the coating layer 120. After molding, the base layer is post-molded, and the coating layer 120 is formed due to a difference in distribution of thermal stresses due to a difference in cooling time between the coating layer 120 and the base layer 130 after injection molding. It is characterized in that it is possible to prevent in advance the surface bending that may occur on the phase.

Description

High glossy real wood products and manufacturing method thereof

The present invention relates to a high-gloss real wood products, more specifically, to manufacture products such as automotive interior materials using a wood (Wood) material, to improve the quality by preventing the bends that may occur on the surface of the product during the manufacturing process The present invention relates to a high-gloss real wood product and a method of manufacturing the same, which can be upgraded.

Generally, products such as automobile interior materials are made of synthetic resin. Synthetic resin products have the advantage of being easy to manufacture at a relatively low cost, while the texture is rough and bad problem. For this reason, construction of interior materials using natural materials, such as leather and wood, is increasing in luxury cars.

For example, the manufacture of real wood products applied to automobile interior materials, and the like has been disclosed in the registered Patent No. 10-0913811 (notice date 2009.08.26).

Looking at the manufacturing process of such a conventional real wood products, the step of forming a wood layer of a predetermined shape by pressing a real wood material, an injection step of forming a base layer on the back of the wood layer, and the base layer formed wood A painting step of applying a coating on the top surface of the layer, a coating step on the top surface of the painted wood layer to form a coating layer, a milling step of cutting an end portion of the base layer on the coated wood layer and its rear surface, And polishing the milled product surface.

In this case, the base layer is provided with a coupling structure such as a boss or a rib for coupling with other components such as an automobile body.

In the conventional method of manufacturing a real wood product as described above, the base layer is first injection-molded on the back of the wood layer in the manufacturing process, and then a coating layer is formed on the top of the wood layer.

However, due to different cooling times of the base layer and the coating layer, surface bending occurs frequently in the coating layer due to a difference in thermal stress distribution due to an irregularly formed bonding structure during cooling of the base layer, and thus, real wood products. There is a problem that the appearance quality of the deterioration.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and in the manufacture of a real wood product, a low pressure urethane coating layer is preformed on the surface of the wood layer, and then a high pressure, close injection base material layer is formed on the bottom of the wood layer. (Iii) It provides a high-gloss real wood product and a method of manufacturing the same by molding to prevent the occurrence of bending on the surface of the coating layer due to differences in thermal stress distribution according to the difference in cooling time after molding. have.

A high-gloss real wood product manufacturing method of the present invention for realizing the object as described above, the first step of forming a wood layer of a predetermined shape by putting a wood (Wood) material in the press; A second step of injecting the molded wood layer into an insert mold and then injection molding the coating layer on one surface; And a third step of injection molding the substrate layer on the other surface of the wood layer having a bonding structure with other components, including preforming the coating layer and then postforming the substrate layer. After injection molding, it is possible to prevent surface bending that may occur on the coating layer in advance due to a difference in distribution of thermal stress (Thermal sterss) according to a cooling time difference between the coating layer and the base layer.

In this case, the wood layer, a plurality of through holes so as to improve the bonding force with the coating layer; further comprising a part of the coating layer during injection molding is formed to be caught on the other edge of the wood layer after passing through the through holes It is characterized by.

In addition, the second step, further comprising the step of painting the surface of the coating layer.

In addition, the coating layer is characterized in that the polyurethane (Polyurethane) material.

In addition, the base layer is characterized by selectively containing any one or a plurality of PC, PC, PC, ABS, PS, PC, PMA.

In addition, the third step, the step of cutting the end of the real wood product formed with the coating layer and the substrate layer through a processing tool; further includes.

The method may further include sanding the surface after the cutting step.

The method may further include painting the cut end after the sanding step.

High-gloss real wood products according to the present invention that can be manufactured according to the above manufacturing method, the wood layer of the wood material (Wood) formed with a plurality of through-holes in the body; A coating layer made of polyurethane, which is primarily injection molded on one surface of the wood layer, the hook part of which is hooked to the other surface of the wood layer after a part passes through the through hole; And a base material layer made of a thermoplastic resin that is injection-molded on the other surface of the wood layer in a second manner and provided with a coupling structure with other components.

The present invention according to the configuration as described above, by first injection molding the coating layer formed on the surface of the wood layer and then injection molding the base layer on the bottom, the coating layer by the difference in thermal stress distribution according to the cooling time difference after molding It is possible to prevent the occurrence of bending on the surface, thereby improving the appearance quality of the product.

In addition, there is an advantage that the coating layer can be prevented from being peeled off by applying the structure of the through-hole and the locking portion formed therebetween between the wood layer and the coating layer.

1 is a perspective view showing an embodiment of a high-gloss real wood product according to the present invention,
Figure 2 is a side cross-sectional view showing a laminated structure of FIG.
Figure 3 is a side cross-sectional view showing a peeling prevention structure of a high gloss real wood product according to the present invention,
Figure 4 is a manufacturing process of the high-gloss real wood products according to the invention.

Hereinafter, the configuration and operation of the preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Here, it should be noted that in adding reference numerals to the elements of each drawing, the same elements are denoted by the same reference numerals as much as possible even if they are displayed on different drawings.

1 is a perspective view showing an embodiment of a high-gloss real wood product according to the invention, Figure 2 is a side cross-sectional view showing a laminated structure of Figure 1, Figure 3 is a peeling prevention of the high-gloss real wood product according to the invention Side cross section showing the structure.

1 and 2, the high gloss real wood product 100 according to an exemplary embodiment of the present invention includes a wood layer 110, a coating layer 120, and a base layer 130.

Referring to the configuration of the present invention in detail as follows.

The wood layer 110 implements a real wood pattern on the product by using wood, which is a real material in terms of high-end interior materials of the vehicle, and the wood layer 110 inputs a wood material into a press to form a predetermined shape. Press molding is performed.

In this case, the press may use a hot press that sandwiches a wood material between the hot plates and forms a desired shape by applying pressure and heat.

The coating layer 120 is laminated on one surface (surface) of the wood layer 110 through low-pressure insert injection to protect the wood layer 110 and to have gloss.

Here, preferably, the coating layer 120 which is injection molded primarily may be made of a polyurethane material, and the coating layer 120 may be exposed to the outside through the coating layer 120. It may be formed of a transparent material.

In this case, the present invention has been described with reference to an example in which the coating layer 120 is made of a polyurethane material. However, the present invention is not limited thereto and may be applied to a thermoplastic resin material such as ABS resin, acrylic resin, and polycarbonate resin. .

Meanwhile, a separate anti-peel structure may be applied to prevent the coating layer 120 laminated through the low pressure insert injection from being peeled from the wood layer 110.

Referring to Figure 3 in detail with respect to the peeling prevention structure of the coating layer 120, the body of the wood layer 110 is provided with a plurality of through-holes 111 to improve the bonding force with the coating layer 120. do.

In addition, a part 121 of the coating layer 120 passes through the through hole 111 during the first injection for stacking the coating layer 120, and a locking portion 121 having a structure that is caught on the other surface of the wood layer 110 is formed. Accordingly, the coating layer 120 and the wood layer 110 may be integrated, and the coating layer 120 may be prevented from peeling off due to the structure of the locking portion 121.

The base layer 130 is formed through the injection of a high-pressure secondary insert on the other surface (bottom) of the wood layer 110 after the coating layer 120 is laminated on the surface. Here, preferably, the base layer 130 may selectively include any one or a plurality of materials of a PC, a PC, a PC, an AS, a PS, a PC, a PCA, and the like.

Referring back to FIG. 2, a coupling structure 131 such as a boss or a rib is applied to the bottom of the base layer 130 so as to be coupled with other components. That is, the coating layer 120 is formed to have a uniform thickness, whereas the base layer 130 is formed in an irregular shape as the coupling structure 131 with other components as described above is applied.

Therefore, after primary injection molding the base layer 130 on the bottom surface of the wood layer 110, when the coating layer 120 is secondaryly molded on the surface of the wood layer 110 is required to cool the base layer 130 There is a problem that the appearance quality may be degraded, such as bending occurs on the coating layer 120 by the time difference.

In other words, the present invention preforms the coating layer on the surface of the wood layer 110, and then post-forms the base layer 130 to which the bonding structure 131 is applied to the bottom surface of the wood layer 110. It is. Accordingly, due to the difference in the cooling time between the coating layer 120 and the base layer 130 injected and the distribution of thermal stresses due to the coupling structure 131, the coating layer 120 is generated on the coating layer 120 (mainly a bonding structure ( 131) to the surface portion corresponding to the surface can be prevented in advance.

For reference, referring to thermal stress, materials generally expand when temperature rises and shrink when temperature decreases. Thus, if a temperature difference occurs in any part of the material, expansion of the hot portion is prevented by the cold portion. On the contrary, the low temperature portion is limited to the high temperature portion. As a result, compressive stress occurs in the high temperature portion and tensile stress occurs in the low temperature portion. At this time, the stress generated inside the material is called thermal stress.

Then, a process of manufacturing a high-gloss real wood product according to the present invention having the above structure will be described with reference to FIG. 4.

First, a wood material cut into a predetermined area as shown in (a) is introduced into a press, and then, as shown in (b), the material is pressed through a press to form a wood layer 110 having a predetermined shape. (Step 1). The thickness of the wood layer 110 may be formed to be 1.7 to 2.7 mm (preferably 2.2 mm).

Then, the injection molding the coating layer 120 on the surface of the wood layer 110 is first injection-molded by inserting the molded wood layer 110 into the insert mold as in (c) and then injecting the polyurethane material at low pressure. (Step 2). The thickness of the coating layer 120 may be formed of 0.3 ~ 1.3mm (preferably 0.8mm).

In this case, a plurality of through holes 111 are provided in the wood layer 110, and a part of the coating layer 120 passes through the through holes 111 at the time of injection, and then the locking portion 121 is disposed on the bottom surface of the wood layer 110. It is formed in a structure that is locked. Therefore, the phenomenon in which the coating layer 120 is peeled off can be prevented (see FIG. 3).

On the other hand, after the coating layer 120 is laminated, as shown in (d) it may be subjected to a painting process to paint in a predetermined color according to the application target of the real wood product 100 on the upper surface. That is, by painting the wood layer 110 in a predetermined color through the painting process, the natural pattern of the wood layer 110 can be highlighted, thereby improving the realism.

In this case, the present invention has been described with reference to an example of the case of painting on the surface of the coating layer 120, but is not limited thereto and may be applied to a case where the painting process is first performed on the surface of the wood layer 110. .

After the coating layer 120 and the predetermined painting process are completed, the base layer 130 is second injection-molded on the other surface of the wood layer 110 as in (e) (third step). The base layer 130 is provided with a coupling structure 131 such as a boss or a rib so as to be combined with other components.

As described above, the coating layer 120 is preformed on the upper surface of the wood layer 110, and then the base layer 130 is post-molded on the bottom surface of the wood layer 110. Due to the difference in the distribution of thermal stress (Thermal sterss) according to the cooling time difference between the 120 and the base layer 130, it is possible to prevent surface bending that may occur on the coating layer 120 in advance.

After the base layer 130 is injection-molded on the bottom surface of the wood layer 110, as shown in (f), the end of the real wood product in which the coating layer 120 and the base layer 130 are formed is mediated through the processing tool (T). As a result, the cutting step is performed to smooth out unnecessary parts or irregularities formed during injection molding.

In addition, after the step of sanding the surface of the coating layer 120 as shown in (g) to (i), and finally finish the painting by cutting the end, the real wood product is completed.

The present invention has been illustrated and described with reference to certain preferred embodiments, but the present invention is not limited to the above embodiments and various changes and modifications are possible without departing from the technical spirit of the present invention.

100: product 110: wood layer
111: through hole 120: coating layer
121: engaging portion 130: base layer
131: coupling structure T: processing tool

Claims (9)

A first step of forming a wood layer 110 having a predetermined shape by inserting a wood material into a press;
A second step of first injection molding the coating layer 120 on one surface after inserting the molded wood layer 110 into an insert mold; And
And a third step of secondary injection molding the base layer 130 to have a coupling structure 131 with other components on the other surface of the wood layer 110.
By pre-molding the coating layer 120 and then post-forming the base layer, thermal stress according to the cooling time difference between the coating layer 120 and the base layer 130 after injection molding Due to the difference in the distribution of the surface that may occur on the coating layer 120 to prevent in advance,
The wood layer 110,
Further comprising a plurality of through holes 111 to improve the bonding force with the coating layer 120, the wood layer 110 after a portion of the coating layer 120 passes through the through holes 111 during injection molding High gloss real wood product manufacturing method for the interior of the car which is caught on the other side.
delete The method of claim 1,
The second step,
Painting the surface of the coating layer (120) in a predetermined color; a high gloss real wood product manufacturing method for a vehicle interior further comprising.
The method of claim 1,
The coating layer 120,
A method for manufacturing a high gloss real wood product for automobile interiors, which is made of polyurethane.
The method of claim 1,
The base layer 130,
A method for manufacturing a high gloss real wood product for automobile interiors, comprising any one or a plurality of PCs, PCs, PCs, PS, PS, PCs, and PCMs.
The method of claim 1,
The third step,
And cutting the ends of the real wood product on which the coating layer 120 and the base layer 130 are formed through a processing tool (T).
The method of claim 6,
And sanding the surface after the cutting step. 20.
The method of claim 7, wherein
And painting the cut end after the sanding step.
A wood layer 110 of wood material having a plurality of through holes 111 formed in the body;
Injection molding is primarily formed on one surface of the wood layer 110, the coating layer of polyurethane material is provided with a locking portion 121 to be caught on the other surface of the wood layer 110 after a portion passes through the through hole 111. 120; And
A high gloss material for automobile interiors, comprising: a thermoplastic resin base material layer 130 which is injection-molded on the other surface of the wood layer 110 and is provided with a coupling structure 131 with other components. Wood product.
KR1020150030149A 2015-03-04 2015-03-04 real wood product and manufacturing method thereof KR102055964B1 (en)

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KR1020150030149A KR102055964B1 (en) 2015-03-04 2015-03-04 real wood product and manufacturing method thereof

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KR102055964B1 true KR102055964B1 (en) 2019-12-13

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101192271B1 (en) * 2011-09-20 2012-10-17 재영웰릭스 주식회사 Interior trim using real wood and production method thereof

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2667237A1 (en) * 2006-11-01 2008-05-15 Mallard Creek Polymers, Inc. Engineered wood product
JP2011143683A (en) * 2010-01-18 2011-07-28 Sumitomo Electric Ind Ltd Composite structural member
KR101417440B1 (en) * 2012-11-30 2014-07-08 기아자동차주식회사 Garnish for interial parts of automobile and manufacturing method of the same

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101192271B1 (en) * 2011-09-20 2012-10-17 재영웰릭스 주식회사 Interior trim using real wood and production method thereof

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