JPH05111902A - Method and device for surface repair of plate material - Google Patents

Abstract

(57) [Summary] (Correction) [Objective] To provide a method and an apparatus capable of continuously and efficiently repairing the unevenness of the entire surface of a plate material with a minimum of putty agent without manual labor. [Constitution] On the surface of the plate P to be repaired, the blade thickness is 0.1 to 3.0 m
The knife coater K of m is tilted to the upstream side in the moving direction of the plate material such that the lower end edge is in contact with the upper surface of the plate material and the lower surface forms an angle (α) of 20 to 60 ° with the upper surface of the plate material, and the longitudinal direction thereof. The axis is set so as to form an angle (β) of 2 to 30 ° with respect to an axis R which is perpendicular to the moving direction of the plate material, and the putty agent A is continuously added in a predetermined amount in the inner angle region of the angle (α). While moving the plate material in a certain direction at a constant speed, the blade pressure of the lower edge of the knife coater K is 0.1 to 5 kg / cm.
Set to ² . The device for performing this is a plate material transfer surface 2
With a machine 1, plate feeding devices 3 to 10, knife coater K, putty agent supply device 17, and knife coater K
Blade pressure adjusting device 1 capable of setting the blade pressure at the lower edge of the blade to a desired value
5 and.

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, peeling a raw wood to a specific thickness by rotary lace and drying it, a plurality of veneers are bonded to each other with an adhesive to form a small surface of plywood. Since it is useful for repairing such irregularities and providing 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. , Is 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 wood is lower. Therefore, plywood with many surface defects can be formed, the amount of processing increases, and the productivity decreases. Securing a workforce is becoming increasingly difficult. These are common problems that domestic plywood factories have, and in order to solve them, mechanical application of putty agent has been attempted, but there were many problems and it was difficult to solve. .

In order to solve these problems, the applicant of the present invention has previously proposed, in Japanese Patent Application No. 3-184263, to achieve labor saving without sacrificing productivity and to achieve stable surface quality with good surface properties. Disclosed is a new plate surface repairing method and device which can supply the plywood for secondary processing. However, based on the subsequent test results, it was found that the blade pressure of the knife coater in the above-mentioned surface repair method and apparatus greatly affects the quality of the product.

[0005]

The present invention has been made based on the above findings, and its purpose is to:
To provide a method and a device capable of continuously and efficiently repairing unevenness on the entire surface of a plate material with a minimum putty agent,
Mainly in the repair processing of the plywood, a labor and labor saving is achieved, and a plywood full surface repairing method and device capable of supplying stable plywood with good surface quality without sacrificing productivity are provided. To do.

[0006]

Means for Solving the Problems In the method and apparatus for repairing the surface of a plate material according to Japanese Patent Application No. 3-184263 disclosed above, the present inventors have provided a mechanical means for applying a putty agent to the entire surface of plywood. As a result of various studies on the blade pressure of the knife coater, the present invention has been completed by establishing a blade pressure value that allows uniform coating with a small amount of putty agent.

[0007] That is, the surface repair method of the plate material according to the present invention,
The steps described in the following (a) to (d), 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 tilted to 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 inner 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, d) When moving the plate material in the above-mentioned fixed direction at a constant speed, set the blade pressure on the lower edge of the knife coater.
It is characterized in that the step of setting to 0.1 to 5 kg / cm ² and the step of setting are carried out in sequence.

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 (e) to (e).
The component described in (i), that is, (e) 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 (f) the plate material as described above. A plate material feeding device that moves in a constant direction at a constant speed, and (g) 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 as to make an angle of 60 ° to the upstream side in the moving direction of the plate material, and its longitudinal axis forms an angle of 2 to 30 ° with respect to an axis perpendicular to the moving direction of the plate material. Thickness 0.1-3.0mm
A knife coater, and (h) a putty agent supply device for continuously supplying a predetermined amount of putty agent 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, (i) At least the blade pressure at the bottom edge of the knife coater
And a blade pressure adjusting device capable of setting a desired value within a range of 0.1 to 5 kg / cm ² .

[0009]

According to the method and apparatus of the present invention having the above-mentioned 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, By setting the blade pressure of the knife coater to a predetermined value within the above range, uniform and good surface repair of the plate material can be performed continuously and efficiently with the minimum putty agent.

[0010]

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 manufactured by bonding 3 to 7 odd-numbered veneers with an adhesive and pressing them with heat. The veneer used here is made by peeling raw wood with rotary lace to a thickness of 0.5 to 4.0 mm and then drying it. Although plywood is obtained by pressing or cold pressing, it is naturally impossible to obtain good plywood because veneer cannot be of good quality due to the recent circumstances of raw wood. Therefore, the deck acquisition rate for decks used for the surface layer and back layer used for plywood is decreasing, reflecting the ever-lowering log situation.
The balance between the deck and the second deck is bad. The log used here is usually used in a plywood factory, and may be either 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 manual repair. The 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 coating formwork plywood to apply a fixed 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 after insect erosion called a horizontal pin that appears in the direction orthogonal to the conduit direction of the raw wood of the plywood surface, 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 processing, It has been found that the angle of the plywood with respect to the feeding direction and the blade pressure when the blade edge of the knife coater comes into contact with the plywood surface have a great influence. 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 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 view (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 a region between the lower surface of the knife coater K and the upper surface of the plywood P at the interior angle α.

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, and 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. Further, 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.

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 20 to 60 °, preferably 30 to 50 °. When the angle α is less than 20 °, the filling property of the putty agent on 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 into the defective portion (uneven portion) becomes insufficient, which is not preferable.

Further, as shown in FIG. 2, the longitudinal axis R of the knife coater K is perpendicular to the moving direction D of the plywood.
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) 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, which may cause 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 the unevenness of the plywood, and the size of the unevenness, the point is that the recesses should be filled evenly without excess or deficiency.
About 50 to 100 g is preferable for one 6-inch 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 plywood.
~ It can be grasped as the average consumption of putty agent when several hundreds of sheets are continuously applied. The feeding speed of the plywood during coating with a knife coater is not particularly limited, but is preferably 20 to 60 m / min.

FIG. 3 shows an example of a mechanism for adjusting and setting the contact pressure between the lower edge (blade edge) of the knife coater K and the plywood P, that is, the blade pressure. By pressing the tip against the side surface of the knife coater K and adjusting the pressing force, the blade pressure can be set to a desired value.

The blade pressure of the knife coater K by the pressing bar 15 is preferably about 0.1 to 5 kg / cm ^2, and more preferably 0.3 to ² kg / cm ² . Blade pressure is 0.1
If it is less than kg / cm ² , the coating amount becomes excessive. Further, when the blade pressure exceeds 5 kg / cm ² , the resistance to the plate material is large and the plate material cannot be fed smoothly. Further, depending on the blade thickness of the knife coater K, the height h from the surface of the plywood P to the contact point between the pressing bar 15 and the knife coater K is preferably about 5 to 50 mm, more preferably 10 to 30 mm. Is preferred. If the height h is less than 5 mm, the resistance of the plate material becomes large, the movement of the cutting edge is lost, and the filling property into the recess is deteriorated. Also,
If it exceeds 50 mm, the pressing effect will be lost and uniform application will not be possible.

4 and 5 show an embodiment of an apparatus for carrying out the surface repairing method for a plate material according to the present invention. FIG. 4 is a side view thereof, and FIG. 5 is a top view thereof. 1 in the figure
Is a base, 2 is a plate material transfer surface formed on the upper surface of the base, and 3 and 4 are upper feed rollers for moving the plywood P from the right side to the left side in the drawing on the plate material transfer surface. 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 keeping 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 press bar for pressing the upper surface of the knife coater K with a predetermined pressure to set the blade pressure of the knife coater to a predetermined value, 16 is a press bar support for adjusting and fixing the angle of the press bar 15, and 17 is a putty agent supply. It is a nozzle.

In this apparatus, plywood P to be surface-repaired
Is fed by the feed rollers 3, 4 and 5, 6 on the plate material transport surface 2 from the right side to the left side in the drawing at a constant speed with the surface to be repaired facing up. The knife coater K having a blade thickness of 0.1 to 3.0 mm is tilted by the holder 14 toward the upstream side in the moving direction of the plywood 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 the upper surface of the plywood. , And its longitudinal axis is attached at an 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 to a desired constant angle within a range of 20 to 60 ° and an angle β to a desired constant angle within a range of 2 to 30 ° is provided at a mounting position 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 amount applied, and the like. Further, the blade pressure of the knife coater K is adjusted and set to a desired constant pressure within a range of 0.1 to 5 kg / cm ² by a pressing bar 15 having a hydraulic ram, an extrusion spring and the like built therein.

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 pressing action of the blade edge of the knife coater 3, and uniform and good surface repair is performed. Done. The results of Examples 1 to 6 and the results of Comparative Examples 1 to 8 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 cracks along the fiber direction of the original plywood (deck) and defective portions (recesses) called lateral pins after worm bite,
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 °, the upper surface of the knife coater is held by the holding bar 15, and the blade pressure is set to 1.0 kg / cm ^2. As a result of continuously applying 100 sheets of plywood using a putty agent, the average coating amount of 51 g / sheet was uniformly applied per plywood size width of 910 mm and length of 1820 mm, and there was no problem in filling the defective part. A plywood having a good surface property was obtained.

[Examples 2 to 6] Plywood of various thicknesses having cracks on the surface of the plywood and insect bites on the surface of the plywood was tested and tested, and Example 1 was used.
Using the same putty agent as above, the blade thickness of the knife coater, the angles α and β, and the blade pressure were appropriately changed, and tests were conducted for uniform coating properties, coating amounts, and filling properties into defective parts. It was the street. 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 good surface properties and satisfying all physical properties was obtained.

[0024]

[Table 1]

Comparative Examples 1 to 8 Original plate (deck) on the surface of plywood
The plywood of B product having a defect (concave portion) such as a crack along the fiber direction and a worm bite called a horizontal pin was continuously coated with the mechanical conditions of the knife coater set to those shown in Table 2. .. Comparative Examples 1 to 4 are average coating amounts of 10 sheets, and Comparative Examples 5 to 8 are average coating amounts of 50 sheets. As shown in Table 2, when the set conditions given in the repair method according to the present invention are deviated, coating unevenness occurs only by passing the above-mentioned number of plywood sheets, and it is difficult to apply a large number of sheets evenly continuously. It was impossible to obtain a result satisfying any of the physical properties, and as shown in Comparative Examples 7 and 8, it was found that the coating was impossible when the blade pressure was 6.0 kg / cm ² or more.

[0026]

[Table 2]

[0027]

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

Satisfactory results cannot be obtained by using knife coater conditions other than those of the present invention 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 applied continuously in a small amount. In particular, in order to evenly fill and apply the putty agent evenly after insect erosion that 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. , As well as the blade pressure need to be set according to the present invention. That is, in Comparative Examples that are out of the scope of the present invention, the surface unevenness and defects after worm eating called horizontal pins are not uniform and cannot be repaired to a good surface. 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-mentioned 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. 4 and 5, a plate material feeding mechanism, a putty agent supply means, a knife. The attaching means of the coater, the adjustment of the blade pressure thereof, the setting means and the like are appropriately changed within the scope of the object of the present invention, and the present invention covers all the modified examples.

[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 repair 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 orthogonal to a feed direction D of a plywood P in a surface repair method according to the present invention.

FIG. 3 is a schematic view showing an example of a mechanism for adjusting and setting a blade pressure of a knife coater K.

FIG. 4 is a side view showing an embodiment of a plate material surface repairing apparatus according to the present invention.

FIG. 5 is a top view thereof.

[Explanation of symbols]

 A Putty agent K Knife coater P Plate material 1 Machine base 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 adjusting lever 12,13 Guide plate 14 Holder 15 Presser Bar 16 Presser bar support 17 Putty agent supply nozzle

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Koichi Tanaka 7-1, 1-1 Hikoshimasako-cho, Shimonoseki-shi, Yamaguchi Prefecture Mitsui Toatsu Chemical Co., Ltd.

Claims (11)

[Claims] 1. A method for repairing a surface of a plate material, which comprises sequentially performing the steps of the following a) to d) in the method of repairing minute 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 in a certain direction with the surface to be repaired up. b) A knife coater (K) with a blade thickness of 0.1 to 3.0 mm, the lower edge of which is in contact with the upper surface of the plate and the lower surface of which is 20 to 20 mm above the plate.
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 where it makes 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 (K) and the upper surface of the plate material, the plate material is kept constant in the predetermined direction. Step of moving at speed. d) When moving the plate material in the above-mentioned certain direction at a constant speed, the blade pressure at the lower edge of the knife coater (K) is 0.1 to 5 kg / c.
Step to set to m ² . 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 by 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 by 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 with respect to an axis perpendicular to the moving direction of the plate material is 2 to 10 °. 6. The blade pressure of the knife coater is 0.3 to 2 kg / cm.
Surface repair method of the plate according to claim 1, ^2. 7. An apparatus for repairing minute irregularities on the surface of a plate material with a putty agent, comprising the constituent elements described in the following items e) to i). e) Machine platform having a plate material transfer surface (2) that can move the plate material (P) to be repaired in a fixed direction with the surface to be repaired up
(1). f) A plate material feeding device (3 to 10) for moving the plate material in the above-mentioned certain direction at a constant speed. g) It is provided close to the plate material transfer surface (2) of the machine base (1), its lower 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. It was mounted in such a state that it tilted to the upstream side in the moving direction of the plate material, and its longitudinal axis made an angle (β) of 2 to 30 ° with respect to the axis (R) perpendicular to the moving direction of the plate material. Knife coater (K) with a blade thickness of 0.1 to 3.0 mm. h) A putty agent supply device (17) for continuously supplying a predetermined amount of putty agent (A) to the inside 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). ). i) Make sure that the blade pressure at the lower edge of the knife coater (K) is at least
A blade pressure adjusting device (15) capable of setting a desired value within a range of 0.1 to 5 kg / cm ² . 8. The repair of the plate material according to claim 7, further comprising an adjusting mechanism for 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. 9. 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 7. The plate material repairing apparatus according to Item 7. 10. A blade pressure adjusting device (15) for the knife coater.
8. The plate material repairing device according to claim 7, wherein is a pressing bar (15) for pressing the side surface of the knife coater with a desired pressure. 11. The blade pressure of the knife coater is 0.3 to 2 kg /
The plate material repairing device according to claim 7, which is set to a desired value within a range of cm ² .