JPH081618A - Molding method for woody base material - Google Patents

Abstract

PURPOSE:To provide a method for molding a woody base material in which scattering of woody fiber can be reduced in the step of molding the material. CONSTITUTION:A method for molding woody base material formed by molding woody fiber F comprises the steps of filling a predetermined quantity of woody fiber F in an air-permeable bag 4 to form a fiber filler, and molding the filler in a predetermined shape to obtain the material.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for molding a wood base material.

[0002]

2. Description of the Related Art Conventionally, a wood base material used as a core material for an automobile interior has been formed by a method as shown in FIG. That is, a wood fiber (see FIG. 4 (a)) F obtained by defibrating a wood chip is mixed with a phenol resin which is a thermosetting resin, and this mixture is piled up in a stacking case 41 of a stacking apparatus 40. After laminating (see (b)), in the shaving step, the upper part of the laminated body is removed by the rotary blade 42 so that the laminated height becomes uniform (see (c)). Further, thereafter, the laminated body L is sucked by the suction / conveyance device 44 connected to the vacuum device, transferred to the heat press mold 46, and set (see (d) and (e)).
A wood base material was obtained by pressing the hot press mold 46 (see the same (f)). As described above, since the finely disintegrated wood fiber F is light, it is possible to stack by dropping and convey by suction.

[0003]

However, in the state of the laminated body L before clamping, the wood fibers F are simply laminated, and the fibers are entangled in a very loose state. Therefore, the wood fibers F are likely to be scattered around during each process, which contaminates the work place and affects the health of the worker. Further, the wood fibers F are scattered, so that the raw material is wasted.

Therefore, an object of the present invention is to provide a method for molding a wood base material which can reduce the scattering of wood fibers in the wood base material forming step.

[0005]

The present inventors have created the following inventions as means for solving the above problems. That is, the invention of claim 1 is a method for molding a wood base material by molding wood fibers, which comprises a step of filling a predetermined amount of wood fibers into a breathable bag to form a fiber packing, and the fiber packing. And a step of forming a body into a predetermined shape to obtain a wooden base material, and a method for forming a wooden base material. The invention of claim 2 is the method of molding a wood base material according to claim 1, wherein the bag body forms a wood base material together with wood fibers. According to a third aspect of the present invention, in the first or second aspect, suction filling is performed by suctioning the inside of the bag body from the outside of the bag body and copying the shape of the wood base material to be molded into the bag body. A step of forming a space, a step of supplying and filling wood fibers from the opening side of the bag body while sucking the suction filling space to form a fiber filling body of a predetermined shape, and maintaining the shape of this fiber filling body And a step of molding the wood base material.

The above-mentioned wood base material is mainly formed by thermocompressing wood fibers. The wood fiber is a fiber obtained by defibrating wood chips, and a conifer or a hardwood can be used as a material for the wood chips. As the material of the wood base material, in addition to wood fibers, thermosetting resins, thermoplastic resins, other fibers, wood powder, and additives can be added.

[0007] The bag means a bag having an opening, which allows air to pass through at a portion other than the opening in the bag-constituting portion and which can store wood fibers without scattering. The bag body may be integrated with the wood fiber at the same time as molding, or may be removed after molding without being integrated with the wood fiber. Further, when they are integrated at the time of molding, it is also possible to use a bag body which has been subjected to a particular treatment in order to impart strength to the wooden base material and to facilitate the processing of the surface of the molding surface. For example,
To give strength, impregnate a thermosetting resin,
It may contain glass fibers. In addition, a thermoplastic resin may be impregnated in order to facilitate integration with the wood fiber. Further, when it is removed after molding, it is necessary that it is not integrated with the wood fiber during molding or that it can be easily separated even if integrated.

In order to ensure good molding, the bag body can be filled with a necessary amount of the wood base material to the wood base material to be formed to form a fiber filler convenient for molding. The size or shape is desirable. As such a bag, cotton, natural fibers such as hemp or nylon,
Nonwoven fabric, woven fabric, knitted fabric, synthetic fiber such as polyester, non-woven fabric made of metal fiber, woven fabric, knitted fabric, and
It is possible to use a bag body made of a sheet-like body having holes formed therethrough. When this bag is a part of a wood base material, it can be treated with an additive that improves or supplements the quality of the wood base material, and can be removed from the wood base material. If so, it can be peeled off easily and can be formed to be reusable. Further, it is also possible to perform a treatment for facilitating the formation, transportation and molding of the fiber filler.

[0009] The fiber packing means the bag body filled with wood fibers. The method of filling the bag body with the wood fiber is not particularly limited, but a method of dropping or blowing the fiber into the bag body from the opening side can be adopted.

At this time, the outer surface of the bag can be set in the concave portion by suction, and at the same time, the bag can be sucked to fill the inside of the bag with the wood fiber. Also,
The shape of the recess may be formed in accordance with the shape of the wooden base material to be molded, and the space inside the bag formed along the inner surface of the recess may be filled with the wood fiber. Furthermore, it is possible to memorize a certain shape, and form a bag so that this shape can be maintained against external force when filling wood fiber, and fill the bag with wood fiber. Good. At this time, the shape of the space inside the bag does not necessarily have to be the shape of the wood base material as it is, and has a clearance that can be filled with wood fibers necessary for molding, and along the uneven shape of the wood base material. It is desirable that it be one.

[0011]

According to the invention of claim 1, the wood fiber is
It is transported or molded while being filled in the bag. Further, in particular, even if the wood fiber is not formed into a mat, it has a form that is easy to handle. According to the second aspect of the present invention, it is not necessary to remove the bag body, and the wooden base material can be subjected to a kind of processing simultaneously with the molding. According to the invention of claim 3, since the suction filling space can be formed inside the bag and the fiber filling body can be formed following the shape of the base material to be formed, the wood fibers can be made uniform along the forming surface during forming. Can be distributed in Also,
The fiber filling body is easily sucked and conveyed to the mold while maintaining the shape of the filling body.

[0012]

According to the first aspect of the present invention, since the bag body is kept filled with the wood fibers during the period from the formation of the fiber filler to the molding, the wood fibers are scattered in the workplace. It is possible to secure a good working environment. In addition, waste of wood fiber does not occur.

According to the second aspect of the present invention, the bag body is formed on the surface of the wood base material by molding the wood base material together with the wood fibers. Therefore, at the time of molding, strength or modification of the molding surface is provided. be able to. Therefore, it is possible to simultaneously prevent the scattering of wood fibers and simultaneously improve the wood base material.

According to the third aspect of the present invention, a fiber filling body that follows the shape of the wood base material is formed, and the wood fibers are evenly applied to the molding surface to eliminate the skeins and blisters during molding. As a result, a molded product of good quality can be obtained.

[0015]

EXAMPLE An example embodying the present invention will be described below.
A description will be given based on FIGS. 1 to 3. The present embodiment is a case where the present invention is applied to the case where the wood fiber F is formed into the wood base material 2 that is the door trim.

In this embodiment, a wood fiber F obtained by defibrating a wood chip is used as in the conventional case, and is vertically opposed to each other and has a mold clearance of a predetermined shape as in the conventional case. A hot press mold is used. Further, as shown in FIG. 1 and FIG. 2, in the present embodiment, a pair of suction molds consisting of a bag body 4 for filling the wood fibers F, a lower mold 12 for setting the bag body 4 and an upper mold 18 and a suction mold 10 is used.

The bag body 4 is shown in FIG. Bag 4
Is made of a non-woven fabric of nylon fibers, and its size is such that it can be filled with the wood fibers F necessary for molding the wood base material. Further, it is formed in an elongated bag shape having a predetermined gusset width and having one opening 5 so that the wood fiber F can be easily filled to a predetermined thickness. The bag body 4 can be ventilated through a non-woven fabric, but the wood fiber F does not penetrate through the non-woven fabric, and the wood fiber once filled inside the bag body 4 is a bag except from the opening 5. It is designed so that you cannot get out of the body 4.

In this embodiment, since the bag body 4 is integrally molded with the wood fiber F, the nonwoven fabric is impregnated with the thermoplastic resin so that the integrally molding is easy.

FIG. 1 shows a suction mold 10 used in this embodiment.
The suction set state of the bag body 4 is shown. The suction mold 10 is composed of a lower mold 12 and an upper mold 18 which are vertically opposed to each other, and by closing the mold, a suction concave portion 20 can be formed following the mold clearance of the hot press mold 30. The lower die 12 is formed in a hollow shape, and the lower die hollow portion 12a can be sucked from a suction device (not shown) connected to a vent 13 provided in a part of the die. The upper surface of the lower mold 12 is
Lower suction surface 20 forming the lower side of the above-mentioned suction recess 20
a is formed. A suction hole 15 is provided through the entire surface of the lower suction surface 20a, and the suction recess 20 and the lower mold hollow portion 12a communicate with each other.

Similar to the lower mold 12, the upper mold 18 is formed in a hollow shape, and the upper mold hollow portion 18a can be sucked from a suction device (not shown) connected to a vent 19 provided in a part of the mold. There is. On the lower surface side of the upper mold 18, an upper suction surface 20b forming the upper side of the suction concave portion 20 is formed.
Similar to 2, the suction hole 21 is provided through the entire surface, and the upper hollow portion 18a and the suction recess 20 are communicated with each other. Further, the upper die 18 is formed so as to be vertically movable by a drive device (not shown) and can be conveyed to the hot press die 30.

A suction concave portion 20 formed by closing the lower mold 12 and the upper mold 18 thus formed is opened to the entire side of the suction mold 10 as shown in FIG. . That is, this opening is the blowing port 22 for the wood fiber F, and the opening 5 of the bag body 4 is set in this blowing port 22 to suck and convey the wood fiber F 24.
As a result, the wood fiber F is blown into the bag body 4. In this embodiment, the entire side of the suction recess 20 is opened according to the degree of the opening 5 of the bag body 4, but the opening 5 of the bag body 4 is formed in a part of the bag body 4. If there is one, the suction recess 2
The zero opening 22 may be provided in a part of the side of the suction mold 10.

Next, the step of molding the wooden base material 2 as the door trim using the bag body 4 and the suction mold 10 will be described with reference to FIG. First, as shown in FIG. 3A, the bag body 4 is set on the lower suction surface 20a of the suction mold lower die 12. At this time, the bag 5 is set such that the opening 5 side is located on the blow-in port 22 side. And the upper mold 18
Is moved downward to form the suction concave portion 20 from the upper mold 18 and the lower mold 12, and the edges of the opening 5 of the bag body 4 are temporarily fixed to respective predetermined positions of the upper and lower molds. Then, in this state, a suction device (not shown) connected to the lower mold 12 and the upper mold 18 is operated to suck the suction holes 15 and 2 of the suction surfaces 20a and 20b, respectively.
The suction concave portion 20 is sucked through the bag body 4 abutting from 1.

As a result, the bag body 4 is attached by suction along the suction surfaces 20a and 20b of the suction concave portion 20,
As a result, the bag body 4 is inflated, and a suction filling space (hereinafter, simply referred to as space) S in which the wood fiber F can be filled is formed inside the bag body 4 (see FIG. 3B). The space S is formed following the shape of the suction concave portion 20, that is, the shape of the wooden base material 2 to be formed. Also,
The wood fiber F can be blown into the space S by suction-setting the bag body 4 along the blow-in port 22 of the suction concave portion 20.

As shown in FIG. 3 (c), the suction mold 10 is operated with the space S formed by operating the suction device in this manner.
The feeding device 24 for the wood fibers F set on the side of the blow-in port 22 of the above is operated to send the wood fibers F into the space S. The sent wooden fiber F tries to go straight in the space S, but the suction hole 1 through the bag body 4
By suction from 5, 21 is sucked to the inner surface of the bag body 4,
Adsorbs and deposits.

At this time, by increasing the number of the suction holes 15 and 21 at the location where the strength is particularly desired to be increased, the amount of the wood fiber F adsorbed at the particular location can be increased. Conversely, by reducing the number of suction holes 15 and 21, the amount of wood fiber F to be adsorbed can be reduced.

By filling the space S with a predetermined amount of the wood fiber F, the bag body 4 and the wood fiber F are integrated with each other, and the fiber filling body T is formed in the suction recess 20. That is, conventionally, a laminated body made of a predetermined amount of wood fibers F was conveyed to a molding step by going through two steps of a laminating step and a shaving step. By forming this fiber filling body T, In one step, the laminating and shaving steps can be omitted. Therefore, a laminating device and a shaving device are not required, and the wood fibers F can be laminated in a compact manner. Further, since the fiber filling body T is forcibly deposited and filled inside the bag body 4 that has been suction-set along the shape of the suction recess 20, the wood fiber F is scattered from the bag body 4 to the outside. Because there is nothing to do
There is no stain around the process, the working environment is kept good, and there is no loss of wood fiber due to scattering. Furthermore, since the fiber filling body T is covered with the bag body 4, it is easy to handle.

Next, as shown in FIG. 3D, when the fiber filling body T is formed, the suction from the lower mold 12 is stopped, and the suction of only the upper mold 18 is continued to make the upper mold 18 The fiber filling body T is adsorbed only on the suction surface 20b of the fiber filling body T, and in this state, the upper mold 18 is moved upward to move the fiber filling body T.
Are conveyed to the heat press die 30. At this time, since the fiber filling body T is covered with the bag body 4, even if the suction force of the upper mold 18 is weak, it is possible to surely hold the wood fiber F as a whole, and as in the conventional case, There is no possibility that wood fibers will fall and lose weight and waste.
Further, since the upper mold 18 conveys the material as it is, the suction concave portion 20
The shape formed by is also easily maintained.

As described above, the transportation in the state of the fiber filling body T prevents the wood fibers F from scattering and makes the wood fibers F easy to handle. Therefore, unlike the conventional case, it is not necessary to provide a paper-making process for facilitating the handling of the laminated body of the wood fibers F or a temporary molding process, and efficient production is possible.

When the fiber filling body T is heated to a predetermined temperature by the upper die 18 of the suction die and placed and set on the molding surface 31a of the lower die 31 of the heat press die 30, the hot press die 30
The upper mold 32 is moved downward to thermocompress the fiber filling body T at a predetermined temperature and a predetermined pressure (see FIG. 3E). At this time, since the fiber filling body T has already been formed following the shape of the clearance of the heat press die 30, the wood fibers F are arranged faithfully along the uneven shape of the molding surface 31a of the heat press die 30. be able to. That is, it is easy to apply and maintain the wood fiber F in the vertical wall portion 33 at an appropriate set amount when setting the arrangement.

Further, even when the upper die 32 is moved downward and subjected to hot pressing, the wood fiber F moves to the bottom of the molding concave portion as the upper die 32 is clamped, so that the vertical wall portion 33 has a scale. ,
Wood fibers are not biased to the bottom of the recess to cause blistering. Therefore, the wood base material 2 having the thickness and strength as designed can be obtained.

Further, the bag body 4 is integrated with the wood fiber F at the same time as the heat and pressure, and forms the surface of the wood base material 2.
Therefore, the bag body 4 can also impart desired properties to the wooden base material 2 by applying it to the surface of the wooden base material 2.

After clamping for a predetermined time, the upper die 32 is moved upward and the molded wood base material 2 is taken out. The molded wood base material 2 is further trimmed and the terminals are deburred to obtain a product (see FIG. 3 (f)). The completed wood base material 2 had the density, thickness, and strength as set, and the nonwoven fabric was integrally provided on the surface of the wood fiber.

In this embodiment, the wood base material 2 with a nylon nonwoven fabric is formed, and has a better appearance and strength than the wood base material containing only wood fibers in terms of appearance and strength. Further, even if creases are generated when the bag body 4 is suction set, the nonwoven fabric is made of nylon and is melted at the high temperature of the heat press die 30, so that the surface of the wood base material 2 is not affected. The door trim has no unevenness due to the folds of the bag body 4 on the surface.

[Brief description of drawings]

FIG. 1 is a view showing a state in which a bag set in a suction mold is filled with wood fibers in the present embodiment.

FIG. 2 is a view showing a bag body used in this embodiment.

FIG. 3 is a diagram showing a manufacturing process of the wooden base material in the present embodiment.

FIG. 4 is a diagram showing a conventional manufacturing process of a wooden base material.

[Explanation of symbols]

 2 Wood substrate 4 Bag T Fiber filling S Suction filling space

Claims (3)

[Claims] 1. A method for molding a wood base material, which comprises molding wood fibers, comprising a step of filling a predetermined amount of wood fibers into a breathable bag to obtain a fiber packing, and the fiber packing having a predetermined shape. And a step of obtaining a wood-based material by molding the above, and a method for molding a wood-based material. 2. The method for molding a wood base material according to claim 1, wherein the bag body forms a wood base material together with wood fibers. 3. The suction filling space according to claim 1 or 2, wherein the inside of the bag is sucked from the outside of the bag to form a suction filling space that follows the shape of the wooden base material to be molded inside the bag. The step of forming, the step of supplying and filling the wood fibers from the opening side of the bag body to form the fiber filling body of a predetermined shape while sucking the suction filling space, and maintaining the shape of the fiber filling body. Molding process,
A method for molding a wood-based material, comprising: