JPH0688244B2 - Equipment for manufacturing wood-based compacts - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an apparatus for manufacturing a wood-based molded body, and more particularly to an apparatus for manufacturing a molded body through a preforming process.

(Prior Art) Conventionally, as an example of a method for producing the above-mentioned wood-based molded body, the one disclosed in Japanese Patent Laid-Open No. 62-134215 is known.

This method for producing a wood-based molded body is such that a wood-based molding material is used to first form a low-density material assembly, and then this material assembly is directly supplied into a molding die for thermocompression molding. In the method of manufacturing a wood-based forming body, when forming a material assembly, the wood-based molding material is floated down from above the material assembly laminating container of a predetermined shape to form a low-density, predetermined-shaped material assembly. Are laminated.

(Problems to be Solved by the Invention) By the way, in the above-described conventional method for manufacturing a wood-based molded body, since the wood-based molding material is suspended and lowered / stacked by its own weight, it takes much time to descend / stack. Therefore, as a result, the product cost is likely to be high.

The present invention has been made in view of the above circumstances, and provides a manufacturing apparatus capable of obtaining a raw material aggregate having a predetermined shape and a low density in a short time, and as a result, obtaining a low-cost wood-based molded body. The purpose is to

(Means for Solving the Problem Means for achieving the above object will be described with reference to FIGS. 1b and 1c.The present invention is directed to the wood-based forming materials W2 collected in the stacking device 40. While being conveyed by the belt conveyor 90, the shaping roller 62 is rotated and shaped, and is conveyed to the suction conveyance device 70 as it is, and the shaped wood-based molding material W2 is formed under the suction conveyance device 70 and above the preform mold 73. The material is compressed together with the belt of the belt conveyer using 76 to obtain a material assembly W3 of a predetermined shape and low density. The material assembly is suction-held by the upper preform mold, and the transport member 70 'is moved. Is carried to a molding die and subjected to thermal compression molding to obtain a wood-based molding P.

(Operation) With the above configuration, the present invention operates the belt conveyor and the roller to continuously shape the wood-based compact, and supplies the shaped wood-based compact as it is to the preform mold to compress the whole belt. , We have obtained a material assembly of a predetermined shape,
It is possible to continuously obtain a material aggregate having a low density and a predetermined shape, and the material aggregate thus obtained is suction-held on the upper preform and supplied to the molding die as it is to obtain a wood-based molded article. The completion time can be shortened, and as a result, the cost of the product can be reduced.

(Example) Hereinafter, an example of the present invention is described based on an accompanying drawing.

1a to 1c show a schematic manufacturing process of a wood-based molded product according to the present invention. In Figure 1a,
Reference numeral 1 is a storage tank for storing wood chips W1, and the wood chips W1 conveyed from the storage tank 1 reach a chip washing machine 2 to be subjected to a cleaning action, and then are conveyed to a defibrating machine 3 where they are steamed and defibrated. It is made into fiber. At this time,
The water repellent is supplied from the tank 4 to the defibrating machine 3. The fibrous wood fiber (wood-based molding material) W2 is conveyed to the hot air pipe 5b of the dryer 5 and is carried by the hot air from the dryer 5a to reach the cyclone 5c and then to the cyclone 5c. To be dried. The dried wood-based molding material W2
Is conveyed to the hopper 6a of the mixer 6, and then reaches the wooden body 6b of the mixer 6, where it is mixed with a binder, a water repellent, etc.
It is transported to the next process.

Fibrous wood-based molding material W2 conveyed from the mixer 6
As shown in FIG. 1b, first, they are collected in a stacking unit (stacking device) 40, and then shaving is performed by the next shaving unit 50 and sent to the roller shaping unit 60, where the upper surface portion is shaped. . The shaped wood material W2 is a suction transport device.
Sent to 70, under the suction transfer device 70, upper preform mold 7
3,76 and the belt 92 of the belt conveyor 90 are compressed with a slight pressure to form a material aggregate W3 having a constant shape and low density. After this, the material aggregate W3 is formed by the forming device 30 shown in FIG. 1c.
It is conveyed by the upper preform mold 76 to
It is put into the lower mold 31 of 30. The raw material aggregate W3 put into the lower mold 31 is heated and compressed by the descending upper mold 32 to be a wood-based compact P.

Hereinafter, the details of each step will be described with reference to other drawings.

As shown in FIG. 2, the defibrating machine 3 includes a chip washing machine 2
A hopper 3a for temporarily storing the wood chips W1 conveyed from (FIG. 1a), and the wood chips W1 provided below the hopper 3a.
A fixed amount of the first screw feeder 3b, a steam tank 3c for steaming the wood chips W1 supplied from the first screw feeder 3b, and a steamed wood chip W1 provided under the steam tank 3c. It is provided with a second screw feeder 3d for feeding and a defibrating disc 3e for mechanically defibrating the wood chips W1 supplied from the second screw feeder 3d.

Steam S is supplied from the upper part to the steaming tank 3c, and the wood chips W1 supplied therein are stirred by a stirring rod 3f and steamed by the steam, so that the wood chips W1 can be easily defibrated. Become. The wood chips W1 thus cooked are further conveyed by the second screw feeder 3d to the defibration disc 3e, where they are mechanically defibrated, and then the dryer 5 (see FIG. 1a) via the pressure feed pipe 3g. ).

As shown in FIG. 3, the main body 6b of the mixer 6 has a cylindrical case 6c in which a stirring blade 6d is rotatably incorporated, and the hopper 6a (FIG. 1a) is provided at one end of the case 6c. A receiving nozzle 6d for taking in the wood-based molding material W2 and a spray nozzle 6e for supplying a binder such as pheno resin or a waterproofing agent such as paraffin are provided, and the case 6c is further provided.
Outlet for discharging wood-based molding material W2 at the other end of the
It has 6f.

As a result, the wood-based molding material W2 taken from the inlet 6d to the one end of the case 6c is combined with the binder, the water resistant agent, and the like injected from the spray nozzle 6e there, and is rotationally driven by a drive unit (not shown). It is well mixed by the stirring blade 6d, and is sequentially moved to the discharge port 6f side, from which it is collected.
Be transported to.

A stacking unit 40, the shaving unit 50, a roller shaping unit 60,
As shown in FIG. 1b, the suction and conveyance device 70 has a belt conveyor 90.
Are arranged in this order from the rear side to the front side in the traveling direction of the carrier-side belt 92, that is, in the arrow A direction which is the work conveying direction.

The belt conveyor 90 includes rollers 91a, b, c, d arranged on the upper and lower sides on the left and right sides in the figure, a belt 92 wound around the rollers 91a, b, c, d, and an upper left side. A support plate 93 that is adjacent to the roller 91a and that is in sliding contact with the belt 92 to support the belt 92,
Adjacent to the roller 91c on the upper right side, a pair of holding rollers 94a and b are provided which are arranged at a predetermined distance in the direction of arrow A and support the belt 92. The roller 91a is rotated by driving means (not shown) to rotate the belt 92 in the arrow A direction. The roller 91c is arranged at an oblique position with respect to the roller 91d on the lower right side. Further, the belt 92 is formed of an elastic body and has a large number of holes formed over the entire surface.

The accumulating portion 40 and the shaving portion 50 are arranged side by side on the support plate 93 via the belt 92. The stacking unit 40 includes a hopper 41 having a substantially funnel shape. The shaving unit 50 is housed in the shaving tube 51 and the space below the shaving tube 51,
And a shaving roller 52 that is driven to rotate in the direction of arrow B. The upper portion of the shaving cylinder 51 is connected to a suction fan (not shown) so that it can be sucked.

Wood-based molding material W2 carried into the hopper 41 of the stacking unit 40
Are deposited on the relevant portion, flow out from the bottom portion thereof, are moved in the direction of arrow A by the belt 92, and are conveyed to the shaving portion 50. Wood molding material W2 sent to shaving unit 50
Is leveled by the rotation of the shave roller 52 and the suction of the suction fan, and then sent to the roller shaping unit 60.

The roller shaping section 60 is provided with two holding rollers 61 that are arranged adjacent to the support plate 93 and slide on the lower surface of the belt 92.
And two shaping rollers 62 arranged on the upper surface of the belt 92 so as to face the two holding rollers 61, respectively. The shaping roller 62 is driven by a driving means (not shown) to form an arrow B.
It is designed to rotate in the direction. In this embodiment, the diameter of the left shaping roller 62 is larger than the diameter of the left shaping roller 62, and the distance between the left shaping roller 62 and the holding roller 61 is the same as that of the right shaping roller 62. It is set to be larger than the distance to the holding roller 61. In the present embodiment, the case where the upper and lower positions of the center axis of the shaping roller 62 are fixed is described as an example, but a driving unit is provided so that the shaping roller 62 can be moved in the vertical direction by this driving unit. You may comprise.

Then, the wood-based molding material W2 sent to the roller shaping unit 60
Is inserted between the shaping roller 62 and the holding roller 61, the upper surface of the shaping roller 62 is shaped by the rotation of the shaping roller 62 to have a predetermined thickness, and is continuously sent to the suction and conveyance device 70 as it is.

In this way, the shaped wood-based molding material W2 is continuously sent to the suction / conveyance device 70, so that the product completion time can be shortened and the cost of the product can be reduced.

As described above, by providing the driving means and configuring the shaping roller 62 so as to be movable in the vertical direction, the shaping roller 62 can be shaped to have an arbitrary thickness and the applicable range can be widened.

The suction conveyance device 70 includes the belt 9 between the holding rollers 94a and 94b.
Placement table arranged on the lower surface of 2 and connected to the pipe 71a
71, an elevating device 72 that is provided below the mounting table 71 and moves the mounting table 71 up and down, and a lower preform mold 73 that is mounted on the mounting table 71 and has a suction hole 73a that extends in the vertical direction.
And a conveying member 7 which is arranged on the upper surface side of the belt 92 and which moves forward and backward in the horizontal direction as indicated by arrows C and D by the driving means.
0 ', a cylinder 74 supported by the conveying member 70', a holding plate 75 attached to the rod 74a of the cylinder 74 and connected to the pipe 75a, and a suction attached to the holding plate 75 and extending in the vertical direction. And an upper preform mold 76 having holes 76a formed therein. A partition plate 76b is provided over the entire circumference of the upper preform die 76 so as to partition the wood-based molding material W2 into a predetermined shape during preforming. A suction fan (not shown) is connected to the pipes 71a and 75a so that suction can be performed and air can be supplied to the pipe 71a. Further, the hopper 80 is arranged so as to house the belt 92 located on the right holding roller 94b and the right upper and lower rollers 91c, d, and the lower portion of the hopper 80 is connected to a suction fan (not shown). ing. A stopper 81 is provided in the vicinity of the right holding roller 94b and on the upper surface of the belt 92, and the stopper 81 is brought into contact with the tip end of the wood-based molding material W2.
The setting position of W2 is regulated.

Then, before the wood-based molding material W2 is placed on the belt 92 from the roller shaping unit 60 and conveyed, the lifting device is previously set.
72 is set to the lower position as shown in FIG.
The lower preform mold 73 placed on the is separated from the belt 92. Then, in this state, the wood-based molding material W2 is conveyed until its tip reaches the stopper 81.

When the tip of the wood-based molding material W2 reaches the stopper 81, the lifting device 72 and the cylinder 74 are actuated, and the lower preform mold 73 and the upper preform mold 76 are respectively used for the wood-based molding as shown in FIG. 4b. Moved to material W2. Then, the wood-based molding material W2 is the belt 92 of the belt conveyor 90.
As a result, a low-density material aggregate W3 having a predetermined shape is obtained as shown in FIG. 4c.

At this stage, suction is performed through the pipe 75a, and the material aggregate W3 is held by the upper preform mold 76 by the suction force. Then, the cylinder 74 is activated and the rod
74a is lifted and the material aggregate W3 is separated from the belt 92 as shown in FIG. 4c. At the same time, the lifting device 72 is operated and the lower preform mold 73 is also moved downward so as to be separated from the belt 92. Then, subsequently, the material aggregate W3 is conveyed onto the lower preform mold 73 as shown in FIG. 4a.

On the other hand, the material aggregate W3 sucked and held by the upper preform die 76 is conveyed to the forming device 30 as shown in FIG. 1c by moving the conveying member 70 'in the direction of arrow C,
At the stage when the part is reached, the suction is released and the mold is put into the lower mold 31.

Figures 5 and 6 show the material aggregates input as described above.
1 shows the structure of a mold for performing W3 compression molding and its usage. In these figures, the lower die 31 is fixed on the heating plate 33, and the upper die 32 is fixed under the heating plate 34. The outer peripheral portion of the lower die 31 is surrounded by a holding frame 35, and a storage space for the material aggregate W3 is formed on the lower die 31.
The upper die 32 can slide along the inner peripheral surface of the holding frame 35. Also, the upper mold 32 has a plurality of gas vent holes.
36 is provided, and the gas vent hole 36 is connected to a vacuuming means (not shown) through a port 37 by a pipe 38. A valve 39 is provided in the pipe 38.

With such a configuration, the lower die 31 and the upper die 32 are preheated by the hot plates 33 and 34 before the compression molding, and the material assembly W3 is first placed on the lower die 31 surrounded by the holding frame 35. (Fig. 5). When the supply of the material aggregate W3 is awaited and the press upper ram (not shown) is lowered, the material aggregate W3 is squeezed between the upper die 32 and the lower die 31, gradually increasing the entanglement of the wood fibers and increasing the entanglement. The density increases, and the molding pressure increases accordingly. During this time, the switching valve 39 is opened and the gas vent hole is opened.
Degas through 36.

In this way, a hard and homogeneous wood-based molded product P is finally obtained in a short time.

(Effects of the Invention) As described above, according to the present invention, since a material having a predetermined thickness is supplied to the upper and lower preform molds by the belt conveyor and the material is compressed together with the belt to obtain a material assembly, No special procedure and equipment for supplying to the preform mold is needed, and moreover, the material aggregate is sucked and held by the upper preform mold and the material aggregate is conveyed to the molding die.
This eliminates the need for special procedures and equipment for transferring from the preform mold to the conveying means, and has the effect of being able to manufacture a molded product with high efficiency and low cost.

[Brief description of drawings]

FIGS. 1a to 1c show a manufacturing process of a wood molding according to the present invention, FIG. 1a is a manufacturing process drawing of a molding material, FIG. 1b is a manufacturing process drawing of a material aggregate, and 1c Fig. Is a molding process diagram, Fig. 2 is a schematic diagram showing the defibrator of Fig. 1a, Fig. 3 is a schematic diagram showing the mixer of Fig. 1a, and Figs.
Fig. 1b shows an example of the operation of the suction conveyance device of Fig. 1b, Fig. 4a is a process diagram showing a state in which the material assembly is carried into the suction conveyance device, and Fig. 4b is a process diagram showing a state in which the mold is closed. FIG. 4c is a process drawing showing a state where the mold is opened, and FIGS. 5 and 6 are sectional views showing the molding apparatus of FIG. 1c, respectively. 30 …… Molding device, 60 …… Roller shaping unit, 61 …… Holding roller, 62 …… Shaping roller, 70 …… Suction conveyance device, 73 …… Lower preform mold, 76 …… Upper preform mold, 90… … Belt conveyor, 92 …… Belt, W2 …… Wood-based molding material,
W3: Material aggregate, P: Wood-based compact.

Claims (1)

[Claims] 1. A wood-based molding material is accommodated along a conveyor belt equipped with a belt made of an elastic material from a rear side to a front side of a carrier side belt, and the material is continuously placed on the belt. An accumulating device for supplying, a shaping roller for shaping the material on the belt to a predetermined thickness, a material aggregate having a predetermined shape and low density by compressing the material together with the belt, and a lower preform mold in order. The upper preform die is provided with a means for sucking and holding the material aggregate, and the upper preform die is supported by a transport member movable in a lateral direction so as to be capable of moving up and down. A manufacturing apparatus for a wood-based molded body, wherein a molding die for compressing the material aggregate to obtain a molded body is arranged within a moving range of a member.