JPS58181628A - Molding mat and manufacture thereof - Google Patents

Abstract

PURPOSE:To improve conveying property and a molding property, by forming a mat molding body wherein wooden fiber including a synthetic resin is deposited, into a concave and convex plate shape wherein concave bent parts and convex bent parts are alternately arranged, and providing a semihardened state on the upper surface or both upper and back surfaces of the plate. CONSTITUTION:Wooden fiber (a) is sent by air and inputted in a hopper 1. In the hopper 1, 5-30pts.wt. of powder (b) of thermosetting synthetic resin such as phenol resin and urea resin are inputted with respect to 100pts.wt. of the wooden fiber (a). The wooden fiber (a) and the resin powder (b) are mixed and a raw material (c) is obtained. Said raw material (c) is sprayed and deposited on a conveying body 2. Then the material is compressed by compressing rollers 3 of network rollers, and a mat molding body (d) is obtained through squeezing rollers 4. Then the molding body (d) is thermally compressed by heating rollers 5, which are a pair of upper and lower embossing rollers. A concave bent parts (f) and convex bent parts (g) are alternately arranged, and a concave and convex plate shaped molding mat (e), whose upper and back surfaces are under the semihardened state, is obtained.

Description

[Detailed description of the invention] The present invention relates to a mat for molding and a method for manufacturing the same.

77), which was manufactured by depositing wood fibers using a dry method,
Mats manufactured by paper-making wood fiber slurry using a wet method have excellent formability and are suitable for deep-drawn diacid mold mats. However, dry-processed wood fiber mats have excellent not only moldability but also flexibility, so when one end is grabbed and lifted, the other end is significantly bent, making handling difficult and having poor transportability.

An object of the present invention is to provide a molding mat with excellent transportability and good moldability, and a method for producing the same.

The present inventor focused on the fact that one of the reasons why conventional products have poor transportability is that the mat has a flat shape,
The idea was to make the mat into a concave and convex plate shape in which concave curved parts and convex curved parts were arranged alternately. Since the uneven board has high rigidity, the mat in the form of an uneven board is inferior to the flexibility of the flat mat and has excellent transportability.

Furthermore.

The uneven plate-like mat is so-called wrinkled, and the wrinkles, that is, the concave curved portions and the convex curved portions, are expanded during molding, so it has excellent moldability.

In addition, the inventor of the present invention noticed that another reason for the poor transportability of conventional products is that the surface of the mat was not hardened, and came up with the idea of making the surface of the mat semi-hardened. It was. A mat with a semi-hardened surface has poor flexibility and excellent transportability on the unhardened surface.

It has better moldability than matte with a completely hardened surface.

Furthermore, the present inventor discovered that when producing a mat as described above, by hot-pressing a mat forming body in which wood fibers mixed with the 91 synthetic resin were deposited, concave curved portions and convex curved portions were arranged alternately. They realized that it is possible to form the material into an uneven plate shape and at the same time make the surface or both sides of the material semi-hardened, thereby increasing the production efficiency.

That is, in the present invention, a mat forming body in which wood fibers mixed with a synthetic resin are deposited is formed into a concave and convex plate shape in which concave curved parts and convex curved parts are arranged alternately, and the surface or both the front and back surfaces are in a semi-cured state. This is a molding mat characterized by:

As is clear from the above description of the process leading up to the present invention, the molding mat of the present invention has excellent transportability and moldability.

In addition, one aspect of the present invention is to deposit a raw material of wood fibers mixed with a synthetic resin to form a mat-forming body, heat-press the mat-forming body, and form concave curved portions and convex-curved portions alternately. This is a method for producing a mat for molding, which is characterized by molding the mat into a shape and at the same time bringing the surface or both front and back surfaces into a semi-cured state.

The method for producing a molding mat of the present invention allows efficient koji production of the above-described molding mat of the present invention.

Next, examples of the present invention will be described.

In this example, using the manufacturing apparatus shown in FIG.
A molding mat shown in FIGS. 5 to 5 is manufactured. ml (&) of wood fiber obtained by steaming, defibrating and drying wood chips is blown into the hopper (1), and the hopper (1)
Add powder (b) of thermosetting synthetic resin such as phenol resin or urea resin to wood fiber (m)/00 parts by weight.
Add 30 parts by weight, especially 10~/S parts by weight, and add wood fiber (
a) and synthetic resin powder (b) k are mixed and the raw material ((J) is distributed.The raw material (0) in the hopper (1) is scattered and deposited on the conveyance belt (2) of the driving belt conveyor, The accumulated raw material (C) is pressed by the pressure rollers (31, (3)) of the net loaf provided above the conveyance belt (2), and the pressed accumulated raw material (c3) on the conveyance belt (2) is transferred to the conveyance belt ( 2) A pinching roller (41, (4) consisting of both upper and lower rollers provided on the front side of the
A flat mat forming body (dJ) is formed by pressing the mat forming body (d) in front of the pinching roller (4).
Heat pressure roller (5) consisting of a lower pair of heated embossing rollers
(1!L)
get. In addition, the heating temperature of the hot pressure roller (5) is the same as that of the raw material (
It is determined according to the type of synthetic resin powder (b) mixed in 0), and in the case of phenolic resin, it is /110 to /70″C9
In particular, it is 760 to 770°C, and in the case of urea resin, 10
0~/170''C9, especially /20~/30''C.

(e) When passing through the hot pressure rower (5) and being hot pressed, the concave curved part (fJ) and the convex curved part (g)
At the same time, both the front and back surfaces thereof become semi-hardened. Such molded silicon (pine) (e) has poor flexibility, excellent transportability, and is easy to handle.
g) has excellent elongation and formability, and is suitable for mats for deep drawing.

), in the illustrated embodiment, synthetic resin powder (b) is mixed into the wood fiber (aJ), but synthetic resin liquid may also be mixed. A pressure row "p(3)" and a pressure row "p(4)" were used for the first step.

A 4Q41L belt may also be used. In addition, a heat pressure roller (
Both the embossing rollers in step F of 5) were heated to semi-cure both the front and back sides of the molding mat (e), but only the surface of the molding mat was semi-cured without heating the lower Enovos roller. It may be a state. In addition, as a means for hot pressing the mat forming body (d), a hot pressing roller (6) consisting of upper and lower heated empos rollers was used, but the upper heated empos roller and the lower (m heated or unheated process/boss) were used. A heat-pressing means comprising a belt conveyor may be used. Spiking may also be performed by inserting a number of thick needles into the forming mat (e) that has passed through the heat-pressing means.

[Brief explanation of drawings]

FIG. 7 is a schematic side view of a molding mat manufacturing apparatus according to an embodiment of the present invention, FIG. 2 is a partial plan view of the molding mat of the same example, and FIG. 3 is a partial plan view of the molding mat of the same example. FIG. 3 is a sectional view taken along the line ff-ff of FIG. 2, and FIG. S is a sectional view taken along the line V--ma of FIG. a: Wood fiber b: Synthetic resin powder C: Raw material
d: Mat forming body e: Mat for Ir1j type f: Concave curved portion g: Convex and convex curve

Claims (2)

[Claims] (1) A mat formed body made of wood fibers mixed with a synthetic resin is formed into a concave and convex plate shape in which concave curved parts and convex curved parts are arranged alternately, and the surface or both the front and back surfaces are in a semi-cured state. A molding mat featuring: (2) A mat-forming body is formed by depositing a raw material of wood fibers mixed with a synthetic resin, and this mat-forming body is heated and pressed to form a nine-concave and convex plate shape in which concave curved parts and convex curved parts are arranged alternately. A method for producing a molding mat, characterized by simultaneously bringing the surface or both front and back surfaces into a semi-cured state.