KR200239905Y1 - A transcription apparatus of direct-heating press system for M.D.F - Google Patents

Abstract

The present invention cuts and applies a thermal transfer film, such as PVC film, which is coated on the back surface of an MDF material, which has been surface-treated in advance, to a desired shape, and temporarily attaches it to a lower die and heats it, After pressurizing, the upper and lower dies were contacted, and the air in the inner space between them was adsorbed and discharged, and then vacuumed, and then preheated to the thermal transfer film adhered to the MDF surface for about 4 to 6 seconds. After pressing, the heating plates having a high temperature of 130 ~ 180 ℃ are re-compressed for about 4 ~ 6 seconds between the MDFs in a state in which the heating plates having a high temperature of 130-180 ° C are in close contact with each other. In the grooves of curved surface or unevenness to make the thermal transfer film adhere to the curved surface or inside of the groove and adhere to it, so that the flat MDF or NC processed MDF table with curved or uneven groove Thermal transfer film such as PVC film is adhered to the surface, and MDF cosmetic board used for furniture, door makeup board and interior decoration board is directly bonded by hot press, and the thermal transfer film is adhesively processed in a short working time in a short time. By eliminating the number of repeated post-treatment processes such as surface polishing and painting, the productivity of MDF cosmetics with thermal transfer film is improved and the working efficiency is improved. The present invention relates to a thermal transfer apparatus for MDF cosmetics that can be produced and provided.

Description

A transcription apparatus of direct-heating press system for M.D.F}

The present invention adheres to heat transfer film such as PVC film on flat medium density fiberboard (hereinafter referred to as MDF (medium density fiberboard)) or NC processed MDF surface with curved or uneven groove. In processing MDF cosmetics used as floor coverings and interior decorative plates, the thermal transfer film is bonded by a simple working process in a short time by a direct thermal press bonding method, and repeated post-treatment such as surface polishing and painting treatment after adhesion By eliminating the number of steps significantly, MDF cosmetics with thermal transfer film improve productivity and work efficiency, so that MDF cosmetics with high surface quality and good three-dimensional appearance can be produced at low cost. It relates to four devices.

In general, MDF is inexpensive compared to solid wood, has good surface workability, and has the advantage that various colors and patterns of the surface can be implemented by the transfer film to be bonded. It is widely used for decorative plywood.

Therefore, in manufacturing a decorative plate by adhering the transfer film to the surface of the MDF having the above-mentioned advantages, in the case of flat MDF, a thermal compression roller while continuously supplying a series of single color and shape thermal transfer films to the MDF And the method of adhering the thermal transfer film while curved or grooved by the membrane press method as in the case of the NC-treated MDF having curved or uneven grooves.

However, in the case of planar bonding using rolls, it is possible to continuously mass-produce and reduce the processing cost by obtaining a planar MDF cosmetic sheet by a simple processing method of supplying a continuous thermal transfer film and compressing and bonding it with a roller on a plane. Although it is processed with a monochromatic process or a simple form of adhesive with only a single pattern on a flat surface using only a single thermal transfer film, its appearance is monotonous and its shape or color is simple and it is not beautiful. It has the disadvantage of not being able to upgrade the product.

In addition, in the latter membrane press processing method, various appearances and colors can be expressed on the MDF surface, and there are advantages in that the curved surface of the MDF surface and the grooves of the unevenness can be variously processed in the required shapes. Not only is the process very complicated and demanding, but also all the work is performed by skilled workers, resulting in inefficient work efficiency and high productivity compared to requiring a large number of workers.

In addition, in the process of adhering the conventional thermal transfer film on the MDF and the post-treatment process after the adhesion, both of the thermal transfer film is first applied in advance to the surface of the MDF, the thermal transfer film required on the adhesive After cutting and temporarily attaching the sand film, it is pressurized, heated, and bonded to each other, and thus the particles of the adhesive on the MDF surface are finely applied in the process of applying the adhesive on the MDF surface having fine surface roughness when the adhesive is applied. Agglomeration of aggregates appears, and minute irregularities appear on the surface of the thermal transfer film.In this state, when the thermal transfer film is heated and pressurized and adhered, the unevenness on the MDF surface is inevitably increased. After pressing to complete adhesion to the MDF surface, polishing and painting the surface of the thermal transfer film adhered to the MDF surface As the post-treatment was repeatedly performed several times, the final required shape and surface were smooth and beautiful MDF boards, which required a lot of labor and labor, resulting in a significant increase in production costs. In addition, heat treatment is performed by an indirect heating method that heats the air inside the press by a heat generating means during processing of curved surface or uneven groove by the membrane press processing method, and the heated air is relatively low temperature of 70 to 80 ° C. Indirectly heated silicon rubber press plate expands the thermal transfer film on the surface of the MDF and heats it to the adhesive layer of the MDF. Heating time is longer and the working time is relatively longer. It requires time and energy sources, and yields lower yields compared to the amount of work, resulting in poor productivity and impossibility of mass production, resulting in higher production costs for MDF boards, except for special cases such as high-end products. Has also shown several disadvantages, including limitations that cannot be widely adopted.

Therefore, the present invention solves the above-mentioned conventional defects, and thermal transfer processing of the MDF cosmetic sheet by a hot plate press which can provide a variety of patterns and colors, as well as a perfect surface or groove processing, at a relatively low cost. In order to provide an apparatus, a first object of the present invention is to provide a high-temperature heating plate and a silicon lamination press plate. It is another purpose to enable mass production of MDF cosmetics by making mass production possible by doubling the amount of production per unit time by drastically shortening the working time such as heating and pressurizing during sand film bonding.

In addition, the present invention is to form an adhesive layer on the back of the thermal transfer film, such as PVC film in advance, and to adhere the individual thermal transfer film of various colors to the required MDF surface, and then to perform a heating, press operation, After completion of the thermal bonding operation, the surface of the thermal transfer film caused by agglomeration of the adhesive on the MDF surface is maintained without any irregularities on the surface of the thermal transfer film. This greatly reduces the number of work by eliminating the finishing work such as the painting work such as the finishing work and the top coat, and greatly reduces the manpower and labor for the post-treatment work as well as the production cost. Another purpose is to provide mass-produced MDF cosmetics for NC machining.

In addition, the present invention does not deform due to unstable adhesion of the thermal transfer film to the curved surface or inside the grooves on the NC processed MDF surface having curved or uneven grooves due to the deformation of the silicon lava press plate in contact with the heating plate of high temperature. By providing perfect adhesiveness, it is possible to provide a variety of decorative MDF boards with a beautiful three-dimensional appearance that can be used for various purposes such as exterior panels of furniture that require three-dimensional appearance, doors or interior decorative boards. There is another purpose in making it possible.

The present invention for achieving all the above objects is a supply means for supplying the MDF while reciprocating in a zigzag, a lower die placed in the square frame of the supply means and formed intake holes in the inner bottom, the lower die A cylinder means having an elevating plate for elevating, an upper die in contact with the lower die, a silicon lava press plate installed on the upper die, and a heat generating plate in close contact with the silicon lava press plate, according to the accompanying drawings. The present invention is described in more detail as follows.

1 is a perspective view showing the overall configuration for explaining the present invention,

2 is a side view of the same;

3 to 5 is a side view for explaining the operating state of the present invention,

3 is a side view showing an MDF material entry state,

4 is a side view showing an operating state at the initial rise of the vacuum state,

5 is a side view showing a pressure, heating bonding operation state,

6 is an exemplary view of the thermal transfer film coating state of the MDF obtained by the present invention

* Explanation of symbols for the main parts of the drawings

1: feed chain 2, 3: upper and lower conveyer 4, 5: lower die 6: MDF material supply means

7, 8: jamming protrusion 9, 10: intake hole 11, 12: square frame 13: cylinder means

14: piston rod 15: exhaust pipe 16: platform 17: gas 18: upper die

19: 4 square frame 20: support span 21: support 22: spring

23: Silicon Lab Press Plate 24: Heating Plate 25: Thermal Transfer Film 26: Workbench

27: adhesive layer 28: groove 29: intake pipe 30: check valve

P₁, P₂: Vacuum Pump M: MDF

Figure 1 is a perspective view showing the overall configuration for explaining the present invention, Figure 2 is a side view, Figure 3 to Figure 5 is a side view for explaining the operating state of the present invention, Figure 3 shows the MDF material entry state It is a side view, Figure 4 is a side view showing the operating state at the initial rise of the vacuum state, Figure 5 is a side view showing the pressure, heat bonding operation state, Figure 6 is an exemplary view of the thermal transfer film coating state of the MDF obtained by the present invention to be.

As shown in Figure 1 to Figure 5, the present invention forms a reciprocating transfer chain (1) on the left and right sides, the upper and lower sides of the left and right transfer chain (1) of the four-frame frame isomorphic The upper and lower conveyors (2) and (3) formed by replacing each other are installed and zigzag reciprocating alternately in accordance with the reciprocating motion of the conveying chain (1), and the upper and lower conveyors on the square frame (2) (3) is provided with MDF material supply means (6) in which the lower dies (4) and (5) are respectively mounted.

The lower dies 4 and 5 of the MDF material supply means 6 are of the same type, and a plurality of locking projections 7 and 8 are projected on either one of the front, rear, left, or right sides of the MDF material supply means (4). 2) (3) is mounted on the upper jaw so that the lower die (4) (5) is suspended, the lower surface of the lower die (4) (5) arranged a plurality of intake holes (9) (10) In the four corners of the lower dies 4 and 5, lattice-shaped frames 11 and 12 with an upper portion open are formed.

On the rear side of the conveying chain 1 of the MDF material supply means 6, the lower dies 4 and 5 respectively mounted on the upper and lower conveyers 2 and 3 to mount the MDF M, respectively. Is provided with a plurality of cylinder means (13) for alternately raising and lowering, and the piston rod (14) of the cylinder means (13) is provided with a lifting table (16) having a vacuum intake pipe (15) The upper die 18 which is mounted on the base 17 in the lifting stroke section of the lifting platform 16 which is lifted and operated by the cylinder means 13 is located.

The upper die 18 is configured in the same shape as the square frames 11 and 12 of each of the lower dies 4 and 5 which are lifted and operated by the lifting platform 16, and the lower die 4 A quadrangular frame 19 is arranged to coincide with the quadrangular frames 11 and 12 of (5), and the support section 20 is provided on the quadratic frame 19 above the upper die 18. Suspended and suspended by the spring 22 so as to be elevated along the support 21 of the lower portion of the base 17, the suspension is suspended, and the silicon lava press plate below the square frame 19 of the upper die 18 23 is installed in a state of covering and covering the entire surface, and a heat generating plate 24 in which a heat medium such as oil is heated and distributed by an electric heater or the like is directly above the silicon lava press plate 23. And a suction force of the plurality of intake pipes 29 fixed to the base 17 in close contact with each other, and the silicon lava press plate 23 penetrating the bottom surface of the heat sink 24. By to be transmitted directly to the high temperature of 130 ~ 180 ℃ of the heat sink 24 is in close contact with the bottom surface of the heat sink (24) is adsorbed by the heat sink 24 to keep the heating efficiency of the silicone rubber pressing plate 23 with high efficiency.

In addition, an air backflow check valve 30 is installed on the intake pipe 29 to drive the vacuum pump P 진공 intermittently during the vacuum operation inside the upper die 19 so that the silicon lava press plate 23 is radiated by a heat sink ( 24) so that it can be adhered to.

(Here, reference numeral P₂ is a vacuum pump for evacuating the air in the space between the upper and lower dies 18 and 4 and 5 to the outside.)

The present invention constituted as described above will be described in more detail according to the accompanying drawings of FIGS. 2 to 4.

First, the MDF (M) surface, which adhesively bonds the thermal transfer film 25, such as PVC film, to the MDF (M) surface in the same manner as usual on the work table 26 or according to the MDF (M) surface shape, cut and partially cut to temporarily attach. In this case, in the present invention, by using the thermal transfer film 25 formed by applying an adhesive to the back of the thermal transfer film 25, such as PVC film in advance to form an adhesive layer 27, according to the adhesive form on the surface of the MDF (M) While temporarily releasing the release paper of the thermal transfer film 25, it is possible to easily perform temporary adhesion by temporarily attaching in a predetermined arrangement state or partial form.

In this way, the inner side of the lower die 4 placed on the conveying chain 1 of the MDF material conveying means 6 and moved to the work table 26 side, for example, the upper conveying table 2 after temporary attaching. After the MDF (M) to which the thermal transfer film 25 is temporarily bonded is placed and placed thereon, the transfer chain 1 is driven to be transferred to the upper portion of the rear platform 16 so as to be aligned with the platform 16. When stopped at the lower side of the conveying chain 1, the lower conveyer 3 installed on the lower side of the conveying chain 1 moves to the worktable 26 side and moves to the mounting work position of the MDF (M) to which the thermal transfer film 25 is attached. After the thermal transfer film 25 is temporarily bonded, the operator performs the MDF (M) mounting work on the other hand.

Continuously operating in this state, the plurality of cylinder means 13 is operated so that the platform 16 mounted on the piston rod 14 thereof is raised to the lower space of the upper platform 2 installed on the conveying chain (1). When entering and contacting the lower die 4, the lower die 4 is held in close contact with the platform 16 to start the ascending operation. When the square frame 11 is in contact with the square frame 19 of the outer circumferential edge of the upper die 18, the lower portion is formed by the silicon lava press plate 23 installed in a closed state on the lower portion of the upper die 18. As soon as the inside of the die 4 is sealed in an airtight state, the cylinder means 13 is stopped for 4 to 6 seconds and the vacuum pump P is operated to draw air inside the lower die 4 to its bottom surface. The upper and lower parts are discharged to the outside through the formed intake hole 9 and the exhaust pipe 15 of the platform 16. (18) (4) At the same time, the air and pressure inside the lower die 4 are removed and preheated to the surface thermal transfer film 25 of the MDF (M) mounted inside the lower die 4, whereby the upper die ( 18 is compressed in a state receiving elasticity downward by the spring 22 on the base 17 so that each square frame 11 and 19 of the lower die 4 and the upper die 18 are hermetically sealed. It is maintained in close contact, so that the vacuum is perfectly made in the inner space between the upper and lower dies 18 and 4 so that the MDF (M) is distorted between the upper and lower dies 18 and 4. The upper mold (18) of the intake pipe (29) installed to penetrate firmly without being prevented such as deformation of the thermal transfer film 25 and at the same time the silicon lava compression plate 23 is installed through the bottom surface of the heating plate (24) It closely adheres to the heating plate 24 by the air suction action inside, and maintains a heated state at a high temperature of 130 to 180 ° C., thereby adhering to the surface of the MDF (M). And it applies a pre-heating the thermal transfer film 25.

In this manner, after performing vacuum and preheating operations of the inner space between the upper and lower dies 18 and 4 for 4 to 5 seconds, the cylinder means 13 is operated again to raise the platform 16 further. The quadrilateral frame 11 of the lower die 4, which is placed on the 16, presses the quadrilateral frame 19 of the upper die 18, which is integrally in contact with the upper die 18. At this time, the silicon lava press plate 23 having flexibility installed on the bottom surface of the upper die 18 is prevented from being raised in contact with the heat generating plate 24 fixed to the base 17 and is compressed. When the lower die 4 is further raised, the heating plate 24 and the silicon lava pressing plate 23 having high heat of about 180 to 210 ° C. are closely adhered to each other by the planetary heat medium, and thus the 130 to 180 ° C. of the heating plate 24 is closely attached to each other. The high temperature is transmitted directly to the silicon lava press plate 23 and at the same time the silicon lava press plate 23 is A part of the silicon lava press plate 23 having flexibility due to contact with the surface is immersed in the groove 28 of the open MDF (M) having a relatively low pressure, or easily deformed in response to a curved portion or the like. The thermal transfer film 25 is completely immersed and adhered to the curved surface or the uneven groove 28 of the MDF (M) to be completely adhered to each other, and the heating and the pressing process are performed for about 4 to 6 seconds, and then When the die 4 is lowered, the adhesive work of the thermal transfer film 25 is terminated, and the above-mentioned heating and pressurizing thermally transferable thermal transfer film 25 is adhered to the surface or the groove 28 of the MDF (M). Since the inner space between the upper and lower dies 18 and 4 maintains a perfect vacuum state before the process, the flexible silicon lava press plate 23 compressed between the upper and lower dies 18 and 4 is A suction force acts on the MDF (M) surface side mounted on the lower die 4, and the It is completely immersed and adhered to the surface or curved surface or the groove 28 without any resistance, so that the adhesive state is perfectly made.

Thus, one of the lower dies 4, which has completed the adhesive work of the thermal transfer film 25 on the surface of the MDF (M), is lowered back to the upper conveyer 2 installed on the conveying chain 1, and the lowering is completed. When the work is finished, the MDF (M) decorative plate is moved to the work table 26 side to be performed in the next step, and another MDF to which the thermal transfer film 25 previously mounted on the lower die 5 on the other side is temporarily bonded. M) repeats the above operation, and the lower dies 4 and 5 on both sides mounted on the upper and lower conveyers 2 and 3 alternately reciprocate to perform the adhesive work by temporary adhesive heating. While continuously performing a high heat of about 180 ~ 210 ℃ to the surface of the MDF (M) and the thermal transfer film 25 temporarily bonded to the heat through the silicon lava press plate 23 directly while being heated for a short time The adhesive work on the plane is completed by completing the adhesive work in the inside and making the round trip work cycle within a short time. Any surface or groove 28 mess screen of MDF (M) of the three-dimensional state is formed, it is possible to produce in large quantities in a short time by a simple working process.

The present invention is to cut and apply a thermal transfer film such as PVC film coated with adhesive on the back surface of the MDF material previously surface-treated in a predetermined desired form, and temporarily attach it to the lower die, After heating and pressurizing, after contacting the upper and lower dies, preheating the thermal transfer film adhered to the surface of the MDF for about 4 to 6 seconds while adsorbing and evacuating the air in the internal space therebetween and vacuuming the same. In addition, the silicon lava press plate is re-compressed for about 4 to 6 seconds between the MDFs in a state where the heating plates having a high temperature of 130 to 180 ° C. are closely adhered to the silicon lava press plates. The thermal transfer film adheres to the curved surface or the groove to adhere to the curved surface or groove of the uneven surface of the MDF. The production time is greatly reduced by doubling the production time per unit time, and the adhesive layer is formed on the back of the thermal transfer film such as PVC film in advance, and the individual thermal transfer film of various colors is attached to the required MDF surface. After bonding, heat and press work is performed, and after completion of the heat bonding work, the surface of the thermal transfer film due to agglomeration of the adhesive on the MDF surface does not generate irregularities and keeps the bonded state in a smooth and smoothly required form. As a result, the workmanship and labor for post-treatment work are reduced by greatly eliminating surface finishing work such as post-treatment work after bonding and finishing work such as painting work such as undercoat and top coat. Of course, the production cost is greatly reduced, and the large-scale production of MDF cosmetics for NC processing of curved surface or groove formation at low cost, and the exterior of furniture requiring three-dimensional appearance , But with a variety of features such that can provide large amounts of door or jinyeo beautiful colors and three-dimensional appearance that can be used in various fields such as interior versatility Tuesday flooring for indoor decorative flooring inexpensively exceptional MDF screen.

Claims (2)

Cylinder means having a supply means for supplying MDF while reciprocating in a zigzag shape, a lower die mounted in a quadrangular frame of the supply means and having an intake hole in an inner bottom thereof, and a lifting plate for elevating the lower die. And an upper die in contact with the lower die, a silicon lava press plate installed on the upper die, and a heating plate in close contact with the silicon lava press plate. The method of claim 1, The silicon lamination pressing plate covering the lower part of the upper die is installed in close contact with the heating plate and provided with a direct heat transfer means.