JPH0524003A - Surface retouching method and device of board material - Google Patents

Abstract

PURPOSE:To continuously and efficiently retouch the uniform and favorable surface of board material with the minimum amount of putty by a method wherein the putty is evenly pushed in fine recessed parts on the surface of the board material so as to fill the recessed parts with a knife coater, which is set to the surface of the board material in the predtermined positional relationship. CONSTITUTION:Under the condition that the surface to be retouched is faced upwards, plywood P, the surface of which is to be retouched, is fed on board material transfer surface 2 from right side leftwards at a specified speed with feed rollers 3, 4, 5 and 6. The lower end edge of a knife coater K having the thickness of a cutter blade of 0.1-3.0mm is brought through a holder 14 into contact with the top surface of the plywood P under the condition that the rear surface of the coater tilts to the upperstream side in the running direction of the plywood by the angle (alpha) to the top surface of the plywood and, at the same time, the axis of the longer direction of the coater is attached so as to make the angle (beta) to the axis normal to the running direction of the plywood. At the attaching sites of the holder 14 and of guide plates 12 and 13, a regulating mechanism, with which the angle (alpha) is regulated and fixed to the desired angle within the range of 20-60 deg. and the angle (beta) to the desired fixed angle within the range of 20-30 deg., is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for repairing small irregularities on the surface of a plate material to a uniform surface. The present invention can be applied to wood boards in general, but in particular, it is possible to peel a raw wood to a specific thickness by rotary lace and dry it. Since it is useful for repairing such irregularities and making a good plywood for secondary processing, the following description will be limited to such plywood.

[0002]

2. Description of the Related Art Conventionally, plywood used for secondary processing is manually filled with a commercially available putty agent using a spatula, for example, on a defective portion of the plywood surface (hereinafter referred to as a deck) such as cracks or worms. , Replenishing.

Depending on the size of the plywood factory, 5 to 5
It takes 20 manpower, and the weight of this repair process is increasing in order to cope with raw material logs that are getting lower year by year. The following problems have arisen with respect to the conventional manual repair method in the post-process, which has the largest human arrangement among them. The quality of raw logs has been lowered. Therefore, plywood with many surface defects can be formed, the amount of processing increases and the productivity decreases. Securing labor is becoming increasingly difficult. These are common problems that domestic plywood factories have, and in order to solve them, mechanical application of putty agents has been tried, but there are many problems and they have not been solved.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to make the unevenness of the entire surface of a plate material continuous and with a minimum putty agent. An object of the present invention is to provide a method and an apparatus capable of efficiently performing repair, which mainly achieves labor saving in the repair processing of the plywood, and which does not impair productivity, and has stable surface quality and stable quality. An object of the present invention is to provide a plywood entire surface repairing method and device capable of supplying plywood for the next processing.

[0005]

Means for Solving the Problems As a result of intensive studies for achieving the above-mentioned objects, the present inventors have found that a knife coater (mechanical knife) is used as a mechanical means for applying a putty agent to the entire surface of plywood.
The present invention has been completed by focusing on the point that the application by r) is optimal and establishing the mechanical conditions that enable uniform application with a small amount of putty agent.

That is, the surface repair method of the plate material according to the present invention is as follows:
Steps described in (a) to (c) below, that is, (a)
The step of setting the plate to be repaired so that the surface to be repaired can be moved in a certain direction, and (b) a knife coater with a blade thickness of 0.1 to 3.0 mm, whose lower edge is the upper surface of the plate. In contact with the upper surface of the plate material at an angle of 20 to 60 °, and tilts toward the upstream side in the moving direction of the plate material, and its longitudinal axis is 2 to 30 ° with respect to the axis perpendicular to the moving direction of the plate material.
And (c)
While continuously supplying a putty agent in a predetermined amount to the interior angle region of 20 to 60 ° formed by the lower surface of the knife coater and the upper surface of the plate material, a step of moving the plate material in the constant direction at a constant speed, It is characterized in that it is carried out sequentially.

Further, the surface repairing device for a plate material according to the present invention used for carrying out the above method is described in the following items (d) to (d).
The component described in paragraph (g), that is, (d) a machine base having a plate material transfer surface capable of moving the plate material to be repaired in a fixed direction with the surface to be repaired upward, and (e) the plate material as described above. A plate material feeding device that moves in a constant direction at a constant speed, and (f) is provided close to the plate material transfer surface of the machine base, the lower end edge of which is in contact with the upper surface of the plate material, and the lower surface thereof is the upper surface of the plate material and A blade attached so that it makes an angle of 60 ° to the upstream side in the moving direction of the plate material, and its longitudinal axis makes an angle of 2 to 30 ° with respect to the axis perpendicular to the moving direction of the plate material. Thickness 0.1-3.0mm
And (g) a putty agent supply device for continuously supplying a predetermined amount of putty agent to the inner angle region of 20 to 60 ° formed by the lower surface of the knife coater and the upper surface of the plate material. It is characterized by that.

[0008]

According to the method and apparatus of the present invention having the above-described structure, the putty agent is uniformly pressed and filled into the fine recesses on the surface of the plate material by a knife coater set in a predetermined positional relationship with the surface of the plate material, It is possible to continuously and efficiently perform uniform and good surface repair of a plate material with a minimum amount of putty agent.

[0009]

EXAMPLES The present invention will be described in detail below based on specific examples. The plywood used in the present invention has a thickness of 2.5 to 15 mm.
Something is used. The plywood is usually produced by bonding 3 to 7 odd-numbered veneers with an adhesive and hot or cold pressing. The veneer used here is one that is obtained by peeling raw wood with rotary lace to a thickness of 0.5 to 4.0 mm and drying it.Applying an adhesive to the surface of these veneers, stacking multiple sheets and heating them. Although plywood is obtained by pressing or cold pressing, a good quality plywood cannot be obtained due to the fact that veneer cannot be of good quality due to the recent circumstances of raw wood. Therefore, the deck used for the surface layer of the plywood and the Otsu plate used for the back layer are
The acquisition rate of decks has declined, reflecting the situation of logs that are getting lower year by year, and the balance between decks and second decks is getting worse. The log used here is usually used in a plywood factory, and may be hardwood or conifer. Even if a deck with relatively few surface defects is used, the plywood that is heat-pressed and laminated is sorted according to the JAS standard. Among them, the plywood that is called B product with defects is uneven with a putty agent by hand repair. Part needs to be filled. As described above, the proportion of B products requiring repair tends to increase year by year, which is a major issue in terms of productivity and quality.

In order to solve these problems, various coating machines were selected and studied. As a result, focusing on the fact that a knife coater is particularly suitable, the coating conditions were examined. Knife coaters are often used exclusively for painting formwork plywood to apply a certain amount of coating, but the plywood surface that we are aiming for can only be applied to defective parts, and to most unnecessary parts. There is a condition not to do. To satisfy these conditions, general commercially available knife coaters cannot provide satisfactory results. That is, it is necessary to satisfy certain limited mechanical properties under the condition of applying a small amount continuously and uniformly. In particular, after filling with insects called horizontal pins that appear in the direction orthogonal to the conduit direction of the raw wood of the plywood surface, and to apply a small amount uniformly, the blade thickness of the knife coater, the angle between the knife coater body and the plywood surface for treatment, It was found that the angle of the plywood with respect to the feed direction had a great effect. By properly setting these conditions, in the present invention, not only repairing the defective portion of the deck, even if using the second plate for the deck, to obtain a plywood with good surface quality without degrading the plywood quality It was possible to cope with the severe supply situation of raw wood in the future.

FIG. 1 is a schematic diagram (side view) showing the inclination angle (internal angle) α of the knife coater K with respect to the surface of the plywood P in the surface repair method according to the present invention, and FIG. 2 is shown. A schematic diagram (top view) showing an angle β formed by the longitudinal axis of the knife coater K with respect to an axis R perpendicular to the feeding direction D of the plywood P is shown. In FIG. 1, A is a putty agent supplied to the region of the internal angle α between the lower surface of the knife coater K and the upper surface of the plywood P.

Thus, the knife coater K used in the present invention
The blade thickness is 0.1 to 3.0 mm, preferably 0.2 to 1.5 mm, more preferably 0.3 to 1.0 mm. If the blade thickness is less than 0.1 mm, it is uneconomical because the coating amount cannot be reduced. On the other hand, if it exceeds 3.0 mm, it is not preferable because the blade is clogged with wood chips or the like to cause coating unevenness and continuous uniform coating cannot be performed.

Further, as shown in FIG. 1, the angle α between the lower surface of the knife coater K and the surface of the plywood P is preferably 20 to 60 °, more preferably 30 to 50 °. When the angle α is less than 20 °, the filling property of the putty agent to the defective portion (uneven portion) on the surface of the plywood is good, but coating unevenness occurs only by passing a few plywood, and uniform coating cannot be performed, which is preferable. Absent. On the other hand, if the angle α exceeds 60 °, the filling property in the defective portion (uneven portion) becomes insufficient, which is not preferable.

Further, as shown in FIG. 2, the longitudinal axis of the knife coater K is perpendicular to the moving direction D of the plywood R.
The angle β formed with respect to 2 to 30 °, preferably 2 to 10 ° is suitable. If the angle β is out of the range of 2 to 30 °, the following phenomenon often occurs, which is not preferable. That is, 1) the plywood does not move in any direction, meanders, and cannot move in a straight line. 2) When squeezing the applied amount, the putty agent will not be sharpened easily, and wood chips are likely to accumulate, resulting in blade clogging. 3) The feed resistance of plywood increases. 4) The flow of the putty agent becomes poor on the plywood, the resin composition stays in one place, and the change of the resin composition becomes large. Therefore, the angle β is preferably within the range of 2 to 30 °.

The amount of putty applied by the knife coater is
Although it varies depending on the size of bumps and dips on the plywood, the point is that the recesses should be filled evenly without excess or deficiency, usually 3 × 6.
About 50 to 100 g is preferable for each shaku plate. Further, whether the applied amount is normal or abnormal can be observed by the average applied amount. The average coating amount in this case is 10-
It can be understood as the amount of putty agent consumed per plywood when several hundreds are continuously applied. The feeding speed of the plywood when applying with a knife coater is not particularly limited, but is 20-60
m / min is preferred.

3 and 4 show an embodiment of an apparatus for carrying out the method for repairing the surface of a plate material according to the present invention. FIG. 3 is a side view thereof and FIG. 4 is a top view. 1 in the figure
Is a base, 2 is a plate material transfer surface formed on the upper surface of the base, 3 and 4 are upper feed rollers for moving the plywood P on the plate material transfer surface from the right side to the left direction in the drawing, and 5 and 6 are lower A side feed roller, 7 is a motor for rotationally driving the upper feed rollers 3 and 4 via a belt 8, 9 is a motor for rotationally driving the lower feed rollers 5 and 6 via a belt 10, and 11 is a tension of the belt 8. Lever for adjusting, 12 and 13 are guide plates for holding the feeding direction of the plywood P constant on the plate material transfer surface 2, 14 is a holder attached to the left end of the guide plates 12 and 13 for holding the knife coater K, 15 Is a presser bar that presses the entire upper surface of the knife coater so that the knife coater K does not lift during operation, 16 is a presser bar support that adjusts and fixes the angle of the presser bar 15, and 17 is a putty agent supply nozzle.

In this device, plywood P to be surface-repaired
With the surface to be repaired facing upward, it is fed from the right side to the left side in the drawing at a constant speed on the plate material transfer surface 2 by the feed rollers 3, 4 and 5, 6. The knife coater K having a blade thickness of 0.1 to 3.0 mm is tilted toward the upstream side in the moving direction of the plywood by the holder 14 so that the lower end edge of the knife coater contacts the upper surface of the plywood P and the lower surface forms the angle α with respect to the upper surface of the plywood. , And its longitudinal axis is attached so as to form the angle β with respect to an axis perpendicular to the moving direction of the plywood. Holder 14 and its guide plate
An adjusting mechanism for adjusting and fixing the angle α at a desired constant angle within a range of 20 to 60 ° and an angle β at a desired constant angle within a range of 2 to 30 ° is attached to the mounting positions on 12 and 13. It is provided so that these angles can be appropriately adjusted and fixed according to the type of plywood, the feed rate, the type of putty, the coating amount, and the like.

Then, the motors 7 and 9 are driven to drive the plywood P.
While feeding from the right side to the left side in the figure at a constant speed, the putty agent supply nozzle 17 is placed on the plywood P near the lower surface of the knife coater K.
If a small amount of putty agent is continuously supplied from the plywood, the putty agent is pushed and filled into the fine recesses on the surface of the plywood by the feeding force of the plywood and the action of the lower surface of the knife coater 3, and uniform and good quality surface repair is performed. Be done. The results of Examples 1 to 6 and the results of Comparative Examples 1 to 6 in which plywood was repaired according to the method of the present invention using such a surface repairing device are shown below.

[Example 1] For a plywood of B product having a thickness of 2.5 mm, which has a defect (concave portion) such as a crack along the fiber direction of the original plate (deck) along the fiber direction of the plywood and a worm bit called a horizontal pin,
A knife coater K consisting of a blade with a blade thickness of 0.5 mm is set to the above angles α = 45 ° and β = 4 °, and the entire upper surface of the knife coater is held by the holding bar 15, and 100 pieces of plywood are put using putty agent. As a result of continuous application of plywood, the width is 910m.
An average coating amount of 55 g / sheet was uniformly coated per m and a length of 1820 mm, and there was no problem in filling the defective portion at all, and a plywood having good surface properties was obtained.

[Examples 2 to 6] Plywood of various thicknesses having original plate cracks and insect bites on the surface of the plywood was tested and tested.
Using the same putty agent as above, the blade thickness of the knife coater and the angles α and β were appropriately changed, and tests were conducted for uniform coating properties, coating amounts, and filling properties into defective parts. It was Under the conditions of these examples, a small amount of putty was used to sufficiently fill the defective portion, continuous uniform coating without coating unevenness was possible, and a plywood having a good surface property satisfying all physical properties was obtained.

[0021]

[Table 1]

Comparative Examples 1 to 6 Original plate (deck) on the surface of plywood
The plywood of the B product having cracks along the fiber direction and defective portions (recesses) called lateral pins after worm bite was continuously coated by setting the mechanical conditions of the knife coater to those shown in Table 2. . Comparative Examples 1 to 4 are average coating amounts of 10 sheets, and Comparative Examples 5 to 6 are average coating amounts of 50 sheets. As shown in Table 2, when the set conditions set forth in the repair method according to the present invention are deviated, uneven coating is caused only by passing the above-mentioned number of plywood sheets, and it is impossible to apply a large number of sheets uniformly continuously. It became impossible, and the result satisfying all the physical properties was not obtained.

[0023]

[Table 2]

[0024]

Since the present invention is constructed as described above,
According to the present invention, there is provided a surface repairing method and apparatus capable of repairing a small unevenness on the surface of plywood or a defect such as a worm bite called a horizontal pin on a uniform surface to obtain a good plywood for secondary processing. It is something.

Satisfactory results cannot be obtained if knife coater conditions other than those of the present invention are adopted as conditions necessary for uniformly embedding a putty agent in these defective portions. That is, it is necessary to satisfy certain limited mechanical properties of the knife coater under the condition that the putty agent is continuously applied uniformly in a small amount. In particular, in order to evenly fill and apply the putty agent evenly after insect erosion which is called transverse pins in the fiber direction or the conduit direction of the plywood surface plate, the blade thickness of the knife coater, the angles α and β with respect to the plywood surface are applied. It has been found necessary to set according to the invention. That is, in Comparative Examples that are out of the scope of the present invention, the surface irregularities and defects after the worm eating called horizontal pins are not uniform and cannot be repaired to a good surface, and the desired surface physical properties, The coating amount and filling property cannot be obtained. On the other hand, it is clear that the Examples within the scope of the present invention are all excellent in these performances, and the present invention is of great significance.

The present invention is not limited to the above embodiments, and in addition to the above-mentioned laminated plywood, particle boards formed by combining and molding wood chips and other laminated materials, in the case of Depending on the need, it can also be applied to the surface repair of general wooden boards, etc., and also in the apparatus of the embodiment shown in FIGS. 3 and 4, a plate material feeding mechanism, a putty agent supplying means, a knife. The means for attaching the coater and the like are appropriately modified within the scope of the object of the present invention, and the present invention includes all the modified embodiments.

[Brief description of drawings]

FIG. 1 is a schematic view (side view) showing an inclination angle α of a knife coater K with respect to a surface of a plywood P in a surface repairing method according to the present invention.

FIG. 2 is a schematic diagram (top view) showing an angle β formed by a longitudinal axis of a knife coater K with respect to an axis R perpendicular to a feed direction D of a plywood P in a surface repair method according to the present invention.

FIG. 3 is a side view showing an embodiment of the plate material surface repairing apparatus according to the present invention.

FIG. 4 is a top view thereof.

[Explanation of symbols]

A putty agent K knife coater P plate material 1 machine 2 Plate material transfer surface 3,4 Upper feed roller 5,6 Lower feed roller 7 motor 8 belt 9 motor 10 belt 11 Belt tension adjustment lever 12,13 Guide plate 14 Holder 15 Presser bar 16 Presser bar support 17 Putty agent supply nozzle

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Koichi Tanaka             3-1-1 Hikoshimasako-cho, Shimonoseki City, Yamaguchi Prefecture             Jito Pressure Chemical Co., Ltd.

Claims (8)

[Claims] 1. A method for repairing a surface of a plate material, which comprises sequentially performing the steps of the following a) to c) in the method of repairing fine irregularities on the surface of the plate with a putty agent. a) A step of setting the plate material (P) to be repaired so that the surface to be repaired can be moved upward in a certain direction. b) A knife coater (K) with a blade thickness of 0.1 to 3.0 mm is in contact with the upper surface of the plate material at the lower edge and the upper surface of the plate material at 20 ~
An axis that is inclined toward the upstream side of the plate material movement direction so as to form an angle (α) of 60 °, and whose longitudinal axis is perpendicular to the plate material movement direction.
(2) Set to a state that forms an angle (β) of 2 to 30 ° with respect to (R). c) While continuously supplying the putty agent (A) in a predetermined amount to the inner angle region of 20 to 60 ° formed by the lower surface of the knife coater and the upper surface of the plate material, the plate material is moved in the above-mentioned constant direction at a constant speed. Steps to make. 2. The surface of the plate material according to claim 1, wherein the plate material (P) is a plywood obtained by peeling raw wood to a specific thickness with rotary lace and bonding a plurality of dried single plates with an adhesive. Repair method. 3. The knife coater (K) has a blade thickness of 0.3 to 1.0 m.
The surface repair method for a plate material according to claim 1, wherein m is m. 4. The surface repair method for a plate material according to claim 1, wherein an angle (α) formed between the lower surface of the knife coater and the upper surface of the plate material is 30 to 50 °. 5. The surface repair method for a plate material according to claim 1, wherein an angle (β) formed by the longitudinal axis of the knife coater and an axis perpendicular to the moving direction of the plate material is 2 to 10 °. 6. An apparatus for repairing fine irregularities on the surface of a plate material with a putty agent, comprising the constituent elements described in the following d) to g). d) A machine base having a plate material transfer surface (2) capable of moving the plate material (P) to be repaired in a fixed direction with the surface to be repaired up.
(1). e) A plate feeding device (3 to 10) for moving the plate in the above-mentioned fixed direction at a constant speed. f) It is provided close to the plate material transfer surface (2) of the machine base (1), its lower end edge contacts the upper surface of the plate material, and its lower surface forms an angle (α) of 20 to 60 ° with the upper surface of the plate material. The plate was tilted to the upstream side in the moving direction of the plate, and was attached such that its longitudinal axis forms an angle (β) of 2 to 30 ° with respect to the axis (R) perpendicular to the moving direction of the plate. A knife coater (K) with a blade thickness of 0.1 to 3.0 mm. g) A putty agent supply device (17) for continuously supplying a predetermined amount of putty agent (A) to the inner angle region of 20 to 60 ° formed by the lower surface of the knife coater (K) and the upper surface of the plate material (P). ). 7. The repair of the plate material according to claim 6, further comprising an adjusting mechanism capable of setting an angle (α) formed by the lower surface of the knife coater and the upper surface of the plate material to a desired angle within the range of 30 to 50 °. apparatus. 8. An adjusting mechanism for setting an angle (β) formed by a longitudinal axis of the knife coater with respect to an axis perpendicular to the moving direction of the plate material within a range of 2 to 10 °. Item 6. A plate material repairing apparatus according to Item 6.