KR20050015906A - Apparatus and method for manufacturing board having a plurality of protrusions thereon - Google Patents

Abstract

PURPOSE: A manufacturing device and a manufacturing method of a board with plural protrusions are provided to manufacture the product of the board from a raw material without an intermediate process of making a sheet and to simplify the manufacturing process. CONSTITUTION: A manufacturing device of a board with plural protrusions comprises first and second molds(21,22) each including at least one of recessed parts and prominent parts engaging with each other; two mold attachment parts(30) to which the first and second molds are attached; two mold movement parts(40) each combined to the mold attachment parts to move the first and second molds; and a driving part(50) driving the mold movement part. The first and second molds engage with each other with a sheet(85) interposed and plural protrusions are successively formed to the sheet. In the first and second molds, parts situated to a forming path from a first point(71) to a second point(72) where the sheet is discharged are engaged, and parts situated to a return path from the second point and to the first point are disengaged.

Description

Apparatus and method for manufacturing a board having a plurality of protrusions {APPARATUS AND METHOD FOR MANUFACTURING BOARD HAVING A PLURALITY OF PROTRUSIONS THEREON}

The present invention relates to an apparatus and a manufacturing method of a board having a plurality of protrusions. The present invention relates, in particular, to an apparatus and a method for manufacturing a plastic board having a plurality of protrusions arranged in a continuous manner.

Examples of plastic boards having a plurality of protrusions arranged in a continuous series include drain boards used for forming drainage channels such as groundwater in concrete retaining walls or underground concrete structures, or other kinds of drain boards and the like. Various moldings, etc. of the shape similar to the drain board used for the use are mentioned.

Hereinafter, the prior art will be described taking the case of the drain board as an example. Referring to FIG. 1, in order to manufacture a drain board, in order to manufacture a drain board, first of all, a special plastic, that is, high density polystyrene, is heated to increase plasticity, and is extruded into a sheet shape by passing through an extrusion machine, and then passed through a rolling roller To produce a sheet of desired thickness. These sheets are packaged by appropriate lengths after cooling and sold as products. Then, after purchasing the sheet from the drain board manufacturer, a final product having a three-dimensional structure, ie, a drain board, having a plurality of protrusions is manufactured by vacuum forming, which involves reheating the sheet to make it suitable for molding. The manufacture of a three-dimensional board having a plurality of protrusions using sheets made in such a thin and flat shape is also the same for plastic boards having similar shapes other than the drain board.

In the case of manufacturing a board having a plurality of protrusions in two stages of sheet extrusion and protrusion vacuum forming by a conventional sheet manufacturing apparatus having a plurality of protrusions, that is, a separate sheet maker and a protrusion molding machine, There is a problem.

First, the flat sheet, which is the product of the intermediate stage, and the board having a plurality of protrusions, which are the final products, are not only manufactured by separate processes with separate devices. In addition, the price of the final product board increases.

In addition, since the extrusion molding process and the vacuum molding process are separated, the equipment cost is high, the process is complicated, and the production time is reduced because the waiting time is not required for the feeding and discharging of the sheet during vacuum forming. do.

In addition, since the board is manufactured by re-molding the sheet sold as a product, the sheet must be reheated during the vacuum forming process in order to form properly. This also increases the cost and at the same time increases the production efficiency. It is a factor to drop.

The present invention is to solve the above problems, an object of the present invention is a board manufacturing apparatus having a plurality of protrusions capable of manufacturing the final product board directly from the raw material without going through the intermediate step of manufacturing the sheet as a product and It is to provide a manufacturing method.

Another object of the present invention is to provide a manufacturing apparatus and a manufacturing method of a board having a plurality of protrusions with a simplified manufacturing process.

Still another object of the present invention is to provide a manufacturing apparatus and a manufacturing method of a board having a plurality of protrusions, which can be continuously molded and thus do not require a waiting time, thus improving production efficiency.

In order to achieve the above object, the present invention includes a plurality of at least one of the concave portion and the convex portion in a shape that can be roughly engaged with each other, and a plurality of consecutively in the sheet by engaging with each other with a sheet in between A first mold and a second mold configured to form protrusions of the first mold and the second mold; Two mold attachment parts to which the first and second molds are respectively attached; Two mold moving parts coupled to each of the mold attaching parts to move the first and second molds; And a driving part for driving the mold moving part, wherein portions of the first and second molds, which are positioned on the forming path from the first point where the sheet is inserted to the second point where the sheet is discharged, are engaged with each other. And a portion located in the return path from the second point to the first point is in a disengaged state.

In order to achieve the above object, the present invention also includes at least one of a plurality of concave portions and convex portions in a shape that can be roughly engaged with each other, and is continuously connected to the sheet by engaging each other with a sheet interposed therebetween. Injecting the sheet at a first point at which the first mold and the second mold forming a plurality of protrusions start to engage with each other; Moving the first mold and the second mold to the second point where the engagement between the two molds is released while being engaged with each other with the sheet therebetween; Disengaging the first mold and the second mold and simultaneously discharging the board on which the plurality of protrusions are formed at the second point; And returning the first mold and the second mold from the second point to the first point with the disengaged state, and repeating the steps successively. It provides a manufacturing method.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention;

2 is a block diagram illustrating a board manufacturing process having a plurality of protrusions according to the present invention.

According to the present invention, a plurality of protrusions are formed by heating a special plastic material as a raw material to increase plasticity, passing it through an extrusion molding part, extruding it into a sheet shape, and then passing the sheet through a press molding part to form a plurality of protrusions in the sheet. Manufacture a board having. Unlike the prior art, the present invention is characterized in that such a manufacturing process is carried out in one machine and continuously.

In the present invention, the raw material is heated and extruded into a sheet shape by an extruder having a configuration similar to that of a conventional extruder. However, the exit side of the extrusion molding unit is not provided with a rolling roller, unlike the conventional extrusion molding machine.

Figure 3 illustrates a press forming portion following the extrusion portion of the configuration of the present invention. The press-molded part 1 includes a frame 10, first and second molds 21 and 22, an attachment chain 30 to which the first and second molds are attached, and a chain gear (sprocket) for moving the chain ( 40) and a driving unit 50 for driving the chain gear. In addition, the press-molding part 1 prevents sagging of the mold demolding device 61 and the chain 30 to separate the first mold 21 and the second mold 22 from each other for maintenance, and the like. And a guide 65 for appropriately maintaining the engaged state of the molds 21 and 22 attached to the 30.

The frame 10 may be integrally formed with a frame (not shown) of the extruded portion, or may be separately formed and combined with the extruded portion so that the extruded sheet is directly injected into the press portion.

In the present embodiment, each of the first and second molds 21 and 22 is disposed in succession by attaching a plurality of single molds 21a and 22a (see FIG. 4) to the chain and configured to have a shape similar to an endless track. The molds 21 and 22 are arranged to overlap and engage each other at a portion of the entire perimeter. The dies 21a and 22a have their longitudinal ends attached to the attachment portion 33 (see FIG. 4) of the attachment chain 30 and fixed to the chain 30. As shown in Fig. 4, in the present embodiment, the first die 21a has a plurality of recesses 25a, and the second die 22a has a recess 25a of the first die 21a. ) And has a plurality of convex portions 25b approximately engaged with each other.

Two chain gears 40 for each chain are respectively disposed on the left and right sides of the frame 10 to support and move the chain 30. The drive unit 50 for driving the chain gear 40 includes a motor 51, a reducer 53, a drive gear 55, a drive chain 57, and the like.

The mold demolding device 61 lifts the first mold 21 located at the upper side together with the chain 30 and the chain gear 40 to which the first mold 21 is attached, and from the second mold 22 positioned at the bottom. By separating, the maintenance work of the molds 21 and 22, the chain 30, etc. can be performed. In the present embodiment, the mold release apparatus 61 may be a pneumatic or hydraulic cylinder, or any other actuator may be suitably used.

A plurality of guides 65 are disposed on the forming path between the first point 71 and the second point 72, and the rollers are arranged in pairs above and below the first and second molds 21 and 22 engaged with each other. And other similar mechanisms.

FIG. 4 is a cross-sectional view of the molds 21a and 22a in a state in which the first and second molds 21a and 22a constituting the molds 21 and 22 of the press-molded part 1 of FIG. Fig. 1 is a cross-sectional view of one embodiment of the first and second molds 21, 22 shown in cross-section. Attachment chains 30 with attachment portions 33 are installed at both ends of the molds 21a and 22a in the longitudinal direction, and the chains 30 mesh with the chain gears 40 so as to engage the respective molds 21a and 22a. ) Is moved in the width direction (the direction penetrating the paper surface of the drawing), and thus the first or second metal molds 21 and 22 having an orbital shape move. The individual molds constituting the first mold 21 are the first molds 21a, and in this embodiment, as shown in the present embodiment, a plurality of recesses 25a are formed, and each individual mold constituting the second mold 22 is formed. The single mold of is a second mold 22a, and a plurality of convex portions 25b are formed in this embodiment as shown in this embodiment. In the portions of the first and second molds 21 and 22 located on the molding path, as shown in FIG. 4, the convex portions 25a and the second mold 22a of the first mold 21a are convex. The portions 25b are engaged with each other with the sheet 81 therebetween to form a plurality of protrusions regularly arranged regularly on the flat sheet 81. The concave portions 25a and / or the convex portions 25b formed on the individual molds 21a and 22a may be identically formed for each mold, but each of the molds 21 and 22 having an orbital shape may be the same. Since the width of the mold is limited, the concave portion 25a and / or the convex portion 25b are different from each other when the plurality of protrusions are to be formed on the sheet 81 in a constant pattern having a size exceeding the width of one mold. The single molds 21a and 22a arranged in the form may be mixed and used in one mold 21 and 22.

Hereinafter, with reference to the accompanying drawings will be described the operation of the board manufacturing apparatus having a plurality of protrusions according to the present invention.

First, a raw material, that is, a special plastic such as high-density polystyrene, is heated in an extruded portion and then extruded to form a sheet member 81. The sheet 81 is immediately put into the press-molded part 1 in a state in which cooling and hardening have not yet been performed, that is, still maintaining sufficient plasticity.

The chain 30 continuously engages with the chain gear 40 driven by the drive unit 50, and thus the first and second molds 21 and 22 attached to the attachment portion 33 of the chain 30. ) Will also move continuously. The caterpillar-shaped first and second molds 21 and 22 have a molding path in which both molds move in engagement with each other between the sheets 81 from the first point 71 to the second point 72. After discharging the molded sheet 85 at the second point 72, the second step 72 again passes through the return path from the second point 72 to the first point 71, which is moved in the disengaged state. Return to point 1 (71). Then, by repeatedly repeating this process, the sheet 85 in which the plurality of protrusions are formed is continuously manufactured.

Here, the first point 71 is a position at which the extruded sheet is put into the press molding part, and the second point 72 is a position at which the sheet formed with a plurality of protrusions is discharged by press molding.

Since the first and second molds 21 and 22 are each composed of a plurality of single molds 21a and 22a, the movement of the first and second molds 21 and 22 as described above is performed by the respective single molds 21a. 22a is engaged at the first point 71 with the sheet 81 interposed therebetween, and moves to the second point 72 by the forming path while retaining the engaged state, and the sheet formed at the second point 72. After discharging 85, the process may return to the first point 71 through the return path.

A plurality of guides 65 properly positioned on the molding path prevent the two molds 21 and 22 from being separated from each other while the first mold 21 and the second mold 22 are engaged with each other to form a protrusion on the sheet. And the two interlocking molds 21 and 22 fall down together to prevent the sheet from bending.

On the other hand, unlike the prior art, it is possible to derive a manufacturing method for continuously manufacturing a board having a plurality of protrusions.

Dividing the board manufacturing process of the manufacturing apparatus of the above-described embodiment in order, the step of putting the sheet 81 in the first point 71, the first and second molds (21, 22) in engagement with each other (that is Moving to the second point 72, releasing the engagement of the first and second molds 21 and 22 at the second point 72 and discharging the board on which the plurality of protrusions are formed. And returning the first and second molds 21, 22 from the second point 72 to the first point 71 with the disengaged (i.e., in the return path) By continuously repeating the above steps, a board having a plurality of protrusions can be continuously manufactured.

5 shows another embodiment of the press-molded part of the present invention. In this embodiment, a forming roller having a structure for forming a sheet on the outer circumferential surface is used instead of the caterpillar-shaped mold coupled to the attachment chain.

The shaping roller unit 100, the first and second shaping rollers 210 and 220 rotatably mounted at predetermined positions of the frame, and the first and second guide rollers 310 and 320 rotatably mounted at predetermined positions of the frame. And a roller driver 500.

The frame 100 may be integrally formed with a frame (not shown) of the extrusion part, or may be separately formed and combined with the extrusion part to maintain the continuity of the board manufacturing process.

The forming rollers 210 and 220 are provided with a forming structure or forming apparatus for forming a plurality of protrusions on the sheet on the outer circumferential surface thereof to form a board having a plurality of protrusions from the flat sheet.

The guide rollers 310 and 320 serve to transfer the extruded sheet to the forming rollers 210 and 220 and may be installed in pairs as necessary.

The forming rollers 210 and 220 are driven and rotated by a chain drive, a gear drive, or the like by the roller driver 500 including the motor 510, the reducer 530, and the like. The guide rollers 310 and 320 may be driven separately from the forming rollers 210 and 220, but in this embodiment, the guide rollers 310 and 320 are connected to the forming rollers 210 and 220 by a chain or the like. That is, by making the outer diameter of the first guide roller 310 positioned below the sheet equal to the outer diameter of the first forming roller 210 and interlocking the first guide roller 310 with the first forming roller 210, The linear velocity on the outer peripheral surface of the roller was set to be the same. The second guide roller 320 and the second forming roller 220 positioned above the sheet are similarly configured.

One embodiment of the structure for forming the protrusions provided on the outer circumferential surface of the forming rollers (210,220) is to form a plurality of concave and / or convex portions (not shown) of approximately engaged shape with the outer circumferential surface of the forming rollers (210,220) will be. For example, a plurality of concave portions are formed on the outer circumferential surface of the first forming roller 210 and a plurality of convex portions engaging with the concave portions of the first forming roller are formed on the outer circumferential surface of the second forming roller 220.

Another embodiment of the structure for forming the protrusions provided on the outer circumferential surface of the forming roller (210,220) is a plurality of holes (not shown) formed on the outer circumferential surface of the forming roller (210,220) and connected to the hole of the forming roller (210,220) There is a vacuum molding apparatus (not shown) installed therein. In the case where the protrusions are formed only on one side of the sheet, the vacuum molding apparatus may be installed only in one of the pair of forming rollers. In the case of forming the protrusions in both directions, the vacuum forming apparatus may be installed in both of the forming rollers. If only one forming roller having a vacuum forming apparatus is required, a conveyor belt (not shown) having a flat top surface may be used instead of the other forming roller.

Hereinafter, with reference to the accompanying drawings will be described the operation of the board manufacturing apparatus having a plurality of protrusions according to the embodiment.

First, a raw material, that is, a special plastic, such as high density polystyrene, is heated in an extruded part and then extruded to form a sheet-like member 810. The sheet-shaped member 810 is sent to the forming rollers 210 and 220 directly through the guide rollers 310 and 320 in a state in which cooling and hardening have not yet been performed, that is, still maintaining sufficient plasticity, and forming rollers 210 and 220. ) Into a board 850 having a plurality of protrusions continuously in a press molding or vacuum forming manner. The finished sheet is cooled and cured, and then cut into pieces and packaged.

Although the configuration and operation of the present invention have been described as an embodiment thereof, those skilled in the art will be able to add various modifications and changes without departing from the spirit and scope of the present invention to the embodiment, the scope of the present invention is the embodiment It should not be limited to this, but should be determined by the contents described in the claims below.

According to the present invention as described above, the following effects can be obtained.

First, the heating step is reduced to twice, and the rolling step is omitted, thereby simplifying the step.

In addition, since the protrusions are formed on the sheet continuously by using a press forming apparatus in a track or conveyor belt form or a roller form, the production efficiency can be improved by eliminating the waiting time caused by the conventional vacuum forming apparatus. have.

In addition, since the final product of the board is manufactured directly from raw materials, the logistics cost is reduced compared to the prior art of manufacturing the board once the sheet is manufactured, and thus, a board having a plurality of protrusions such as a drain board can be manufactured at a lower cost. There is an advantage.

1 is a block diagram schematically illustrating a manufacturing process of a board having a plurality of protrusions according to the prior art.

2 is a block diagram schematically illustrating a manufacturing process of a board having a plurality of protrusions according to the present invention.

Figure 3 schematically shows a press-molded part of the apparatus for manufacturing a board having a plurality of protrusions according to the present invention.

4 is a cross-sectional view illustrating a state in which the first and second molds constituting the mold of the press-molded part of FIG. 3 are engaged with each other in a longitudinal cross section of the mold.

5 schematically illustrates another embodiment of the press-molded part of the present invention.

Claims (11)

A first mold comprising a plurality of at least one of concave and convex portions in a shape that can be substantially engaged with each other, and configured to form a plurality of protrusions continuously in the sheet by engaging with each other with a sheet interposed therebetween And a second mold; Two mold attachment parts to which the first and second molds are respectively attached; Two mold moving parts coupled to each of the mold attaching parts to move the first and second molds; And It is configured to include a drive unit for driving the mold moving unit, In the first and second molds, portions located in the forming path from the first point into which the sheet is inserted to the second point into which the sheet is discharged are engaged with each other, and the return path from the second point to the first point is interlocked with each other. And the positioned portion is in a disengaged state. The method of claim 1, wherein the mold moving unit has a plurality of projections, characterized in that at least two chain transmission device including a chain gear and a chain wound around the chain gear respectively installed near the first and second points. Board manufacturing apparatus. The apparatus of claim 2, wherein the chain is an attachment chain, and the mold attaching portion is an attaching portion integrally formed with the chain. 4. The apparatus of claim 3, wherein the first and second molds each comprise a plurality of sheet metals, and each sheet metal is attached to each attachment portion of the chain. . The apparatus of claim 1, wherein the first mold includes only a plurality of recesses, and the second mold includes only a plurality of protrusions. The apparatus for manufacturing a board having a plurality of protrusions according to claim 1, further comprising an extruded part for extruding the material of the board into a sheet. The apparatus for manufacturing a board having a plurality of protrusions according to claim 1, further comprising a heating unit for heating a material of the board formed into a sheet. 2. The plurality of protrusions of claim 1, further comprising: a mold release apparatus for moving one of the first mold and the second mold away from the other to prevent the two molds from engaging with each other on the molding path. Manufacturing apparatus of board having. A first mold and a first mold comprising a plurality of concave portions and convex portions in a shape that can be substantially engaged with each other, and forming a plurality of protrusions continuously on the sheet by engaging with each other with a sheet interposed therebetween Putting the sheet at a first point at which the two molds start to engage each other; Moving the first mold and the second mold to the second point where the engagement between the two molds is released while being engaged with each other with the sheet therebetween; Disengaging the first mold and the second mold at the second point and simultaneously discharging the board on which the plurality of protrusions are formed; And Returning the first mold and the second mold from the second point to the first point with the disengaged state, wherein the steps are successively repeated to manufacture a board having multiple protrusions. Way. 10. The method of claim 9, wherein the first mold includes only a plurality of recesses and the second mold includes only a plurality of convex portions. 10. The method of claim 9, further comprising an extrusion step of extruding the material of the board into a sheet.