JP2002127504A - Printing method for plate products by plastic extrusion molding - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To control a pattern (pattern or figure) printed on a plate material product by each plastic extrusion molding to make the pattern different. SOLUTION: The printing method includes at least an extrusion processing step, a solidification processing step, a printing processing step, a pick-up processing step, and a cutting processing step, and the printing method in the printing processing step adopts a surface treatment apparatus of a computer digital control. Tens of thousands of patterns (patterns or figures) are input into the surface treatment device 3, and a pattern is selected by a computer according to a predetermined method or a random number method, and jetting (jetting) printing is performed on the surface of the solidified molded body. How to

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of printing on a plate product by plastic extrusion, and more specifically, a method of printing on each plate product by plastic extrusion using a digital control system of a computer. The present invention relates to a printing method for controlling a pattern (pattern or figure) and making the pattern different.

[0002]

BACKGROUND OF THE INVENTION As natural resources become increasingly difficult to obtain, a number of things have been replaced by plastic products from products made of natural materials. For example, the material of the door used in the conventional room is all wooden, but at present, the material of the door is a plastic molded product. Conventionally, treads arranged at the lower part of the wall were also made of real wood, but many of the treads currently used are manufactured by plastic extrusion molding, and grooves for inserting electric wires therein are provided. It is provided and has sufficient practicality. However, plastic products are only industrial products and feel cold when compared to natural materials.
For this reason, some traders carry out two processing operations on the above-mentioned plastic products, print a wood grain pattern on the surface of the plastic products, and devise the appearance to resemble real wood, so as to reduce the feeling of plastic industrial products. I have to.

[0003] A conventional printing method for a plastic industrial product is to perform printing by a roll means. FIG. 1 shows a conventional manufacturing method. A plastic plate material is extruded from an extruder, which is an extruder 10,
After being cooled and solidified by the cooling water tank as the solidifying device 20, the pattern is printed on the plastic plate by the roll printing machine of the roll printing device 30. Then, the product is completed by processes such as the take-up device 40 and the cutting device 50. However, the conventional method using the roll means has a defect. For example, since the printed pattern is a regular pattern, it has a considerable difference from the pattern of a real wood product. In other words, patterns in real wood products have very few regularities like printed patterns. Therefore, the product obtained by the above-mentioned printing has less natural feeling and also has an image of an artificial product.

[0004] Since the effect of the pattern is determined by the pattern of the roll means, it is necessary to change the roll means when printing a different pattern. In such a case, it is not only time-consuming to replace the roll means, but also it is necessary to prepare many roll means having different patterns. Therefore, it is completely disadvantageous when considering costs. In addition, in order to form a different pattern on each shipped product, it is necessary to select a pattern during the packaging process. It is necessary to selectively concentrate and pack plate materials with multiple patterns and plate materials with different patterns, and to mix plate materials with different patterns in the product at the time of shipment, and such work is also expensive. This is one of the factors.

[0005]

DISCLOSURE OF THE INVENTION In view of the above, the present invention has solved the above-mentioned problems, and can continuously print different patterns (graphics or patterns) between plastic plates, and it is necessary to replace any member. Another object of the present invention is to provide a method of printing on a board material by plastic extrusion which can reduce manpower and manufacturing cost.

The present invention also provides a sheet material product by plastic extrusion which can eliminate a selective concentration step in a packaging step, can perform a packaging operation quickly and neatly, and can reduce a packaging cost. The next object is to provide a printing method.

[0007] To achieve the above object, the present invention provides:
Including a surface treatment device driven by computer control, utilizing a large number of digital images stored in advance in the device, and sampling by a specific number or random number, printing a graphic on a plastic plate material by inkjet technology, As a result, it is possible to provide a product in which the shapes of the respective plate materials can be made different from each other, so that the physical feeling can be improved, and the motivation of the winner to purchase can be obtained.

[0008]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In the accompanying drawings, FIGS. 2, 3, and 4 are explanatory diagrams showing a flowchart of a manufacturing process, a work flowchart, and a simple combination of work processes, respectively, of the present invention.

As shown in the drawing, the method of printing on a board material by plastic extrusion of the present invention has at least the following steps. (1) Extrusion processing step A1: Raw material extruder 1
After being melted at a high temperature, it is extruded through a mold in the extruder 1 according to actual needs to form a molded body for a predetermined use. (2) Solidification treatment step A2: Since the molded body obtained by extrusion molding is not completely molded with high heat, the molded body is completely solidified after cooling by the solidifying device 2. (3) Print processing step A3: A figure is formed on the surface of the solidified molding in the solidifying apparatus 2 via the surface processing apparatus 3 controlled by a computer control method.
(Jet) printing (pattern or pattern). (4) Pickup processing step A4: The picked-up device 4 continuously picks up the compacts, makes the compacts in the production line continuous, and controls the moving speed of the production line. (5) Cut processing step A5: The continuous formed bodies are cut by the cutting device 5 so as to have a predetermined length, thereby facilitating the transport and transport of the plate material.

As shown in FIG. 3, of the various processing steps, in the first step S1, the extrusion device 1 in the extrusion processing step A1 can be constituted by an extruder. Inside the molding machine, exchangeable molds are housed, and the appearance shape of the extruded molded body is determined by selecting the type of the housed mold, and the molded body extruded from the extrusion molding machine has a high temperature. Since it keeps its state, it has a high degree of plasticity, so it is necessary to take a rapid cooling method to cool and solidify it.

In the solidification treatment step A2 of the second step S2, which is the next step, the solidification device 2 for rapidly solidifying the compact can employ a cooling solidification water tank, and a high-temperature compact can be cooled and solidified. Thus, after cooling and solidification, the molded body has a solidified outer shape.

Subsequently, after the molded body is cooled and solidified, a printing processing step A3 of a third step S3 is performed. The surface treatment device 3 for performing printing has at least computer digital control means, and the means has one or more jet heads. By using this surface treatment device, the surface of the molded article can be obtained. Printing of a desired pattern is performed (the detailed operation of the printing process will be described later).

The fourth step S4 is a pick-up processing step A4, in which the speed of all the manufacturing processes is controlled by the pick-up device 4, and the formed body is simultaneously and continuously picked up. To have a specific aspect.

Finally, a cut processing step A5 of a fifth step S5 is performed. Among them, the cutting device 5 in the present invention
Is a cutting machine, which cuts a continuous formed body into a product of a predetermined length according to the needs, thereby satisfying the needs of the consumer and facilitating the work of transportation.

FIG. 5 shows a printing process (step) in the present invention.
The flow of is shown. As shown in the drawing, a feature of the present invention is to print a required pattern (pattern or figure) on a molded body by employing a computer digital control system. Before printing, it is necessary to obtain each pattern from a computer first, and the pattern is stored in the pattern database of the surface treatment device 3 using various digital image means (for example, a pattern database or a digital camera or a scanner). If the operator memorizes and sets the digital control means of the surface treatment apparatus 3 before the production line starts production, the production line automatically performs the automated production. Thus, the worker need only monitor. By doing so, it is possible to reduce the manpower required for the work.

The operation steps of the printing process A3 of the present invention are as follows. First, in a start S, an operation item to be worked is selected. Options include pattern file work (a), print work (b), and other work (c).
including. In the above, Pattern file operation (a): Includes the following four commands, each of which is a pattern acquisition (a1)-a new pattern is acquired by various digital image acquisition means. Extraction of stored pattern (a2) (1) Extract an existing pattern from the pattern file database. Correction operation (a3) i The pattern file stored in the pattern file database is corrected. Delete operation (a4) (1) Delete a pattern file stored in the pattern file database. 2. Print work (b): When this work is selected, the work of printing a “pattern” or “graphic” is executed. When a “pattern” is to be printed, the operation is as follows. Select the pattern to print (b
1); II. Load the selected pattern (b11): Unload the selected pattern from the file database. III. Enter quantity (b12): Enter the quantity to be printed. IV. Selecting Automatic Operation or Manual Operation (b13): When manual operation is selected, information on a required pattern is obtained by an artificial method (b131). If you choose automatic action,
The computer performs a calculation, and selectively obtains information by a "random number" method (b132). V. Print start (b14): When "graphic" is selected, the operation is as follows. I. A figure is selected (b2). II. Extend selected figure (b21): Extend selected figure from file database. III. Enter the quantity (b22): Enter the quantity of the pattern to be printed. IV. Printing is started (b14). 3. Other work (c): There are two commands below it, each of which is a duplicate (c1). list
(c2) Print one list.

As described above, when the surface treatment apparatus 4 starts an automatic operation, the apparatus first selects all patterns (patterns or figures) in the pattern database, searches for a pattern that meets the conditions, and then meets the conditions. A certain pattern is selected from the patterns by a specific number or a random number, and the pattern is printed on the molded body by the inkjet head. When the pattern is selected by “random number” after the completion of the printing of the first pattern, the apparatus again executes sampling with the random number. The other patterns are fed out from the patterns meeting the conditions. "Specific number"
Is selected, another pattern is fed out according to the conditions of the specific sampling setting, and the pattern is continuously printed on another portion of the formed body, and the above-described processing is repeated until printing is completed on all the formed bodies. In addition, the number of ink jet heads in the surface treatment apparatus 4 of the present invention can be increased or decreased according to actual needs, and a predetermined number of ink jet heads can be provided according to actual conditions of molded bodies of various specifications. Improve the practicality of

FIGS. 6 and 7 show the compositions of different modifications of the embodiment of the present invention. In FIG. 6, the above-described embodiment is different from the print processing step A3.
Is interposed between the pick-up processing step A4 and the cutting processing step A5. Further, in a further different modification of FIG. 7, the print processing step A3 differs from the above-described embodiment.
Are arranged after the cutting step A5, and the same effect as in the above embodiment can be expected. In addition,
The printing process A3 is provided independently outside the production line,
Printing may be performed after the molded body is cut.

[Brief description of the drawings]

FIG. 1 is a diagram showing a simple form of a conventional composition.

FIG. 2 is a flowchart showing a manufacturing process of one embodiment of a method for printing on a plate material product by plastic extrusion of the present invention.

FIG. 3 is a flowchart showing a manufacturing operation of the present invention.

FIG. 4 is an explanatory view showing a simple form of the composition of the present invention.

FIG. 5 is a flowchart illustrating a printing process according to the present invention.

FIG. 6 is an explanatory view showing the composition of a different modification of the printing method for a board material by plastic extrusion of the present invention.

FIG. 7 is an explanatory view showing the composition of still another modified example of the printing method for a plate material product by plastic extrusion of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Extrusion apparatus 2 Solidification apparatus 3 Surface treatment apparatus 4 Pickup apparatus 5 Cutting apparatus

Claims (8)

[Claims] An extruding step (1) of extruding a raw material through a mold in an extruder according to actual needs after melting the raw material at a high temperature to form a molded body having a predetermined specification; Solidification treatment step (2) for solidifying the entire molded body by cooling
And a printing process step (3) of performing jet printing on the surface of the whole solidified body by a surface treatment device; and continuously taking the formed body by a take-off device to continuously form the formed body in the production line. And a cutting process (5) that cuts the continuous formed body to a predetermined length and facilitates unloading and transportation. In the printing method of the plate material product, the printing method of the printing process adopts a surface treatment device equipped with a computer digital control, and first inputs tens of thousands of pattern patterns or figures into the surface treatment device,
Also, a printing method for a sheet material product by plastic extrusion molding, wherein a pattern is selected by a computer by a predetermined method or a random number method, and the pattern is ejected and printed on the surface of the solidified molded body. 2. The method according to claim 1, wherein the printing step is adjusted so as to be interposed between the pick-up step and the cutting step. 3. The print processing step may be provided after the cut processing step or separately from the production line, and the print processing step is performed after the cut processing step of the molded body. A method for printing on a board material by plastic extrusion according to claim 1. 4. The printing method according to claim 1, wherein said surface treatment device is a computer numerical device, and has at least one ink jet head in said device. 5. The printing method according to claim 1, wherein the extruding device is an extruder. 6. The printing method according to claim 1, wherein the solidifying device is a cooling and solidifying water tank. 7. The printing method according to claim 1, wherein the take-up device is a take-up machine. 8. The printing method according to claim 1, wherein the cutting device is a cutting machine.