CN212708499U - Multi-roller continuous high-speed transfer machine - Google Patents

Abstract

The utility model provides a continuous high-speed transfer machine of multi-roll, a serial communication port, include: a box body as a heat preservation chamber; a plurality of parallel thermal transfer rollers arranged in the box body; the steering mechanism is arranged in the box body and is used for enabling the thermal transfer paper to be always positioned between the metal plate strip and the thermal transfer rollers when the thermal transfer paper is wrapped around the thermal transfer rollers; and a plurality of press roller groups for pressing the metal plate strip and the thermal transfer paper on the thermal transfer rollers, wherein the metal plate strip and the thermal transfer paper are sequentially wrapped on part of the roller surfaces of each thermal transfer roller. By arranging the steering mechanism to enable the metal plate strip and the thermal transfer paper to be steered by 180 degrees before the metal plate strip and the thermal transfer paper are wrapped to the next transfer roller after leaving one thermal transfer roller, the thermal transfer paper is ensured to be always positioned between the metal plate strip and the thermal transfer roller when being wrapped around the thermal transfer roller, and therefore the transfer quality is further improved.

Description

Multi-roller continuous high-speed transfer machine

Technical Field

The utility model relates to a continuous high-speed heat transfer device of multi-roll, through adopting this device, can be in succession fast-speed with the printing ink pattern rendition on heat transfer paper or the heat-transfer seal membrane to the metal sheet area, especially relate to a continuous high-speed transfer machine of multi-roll with steering mechanism.

Background

The heat transfer technology was originally originated in japan and korea, and then has been developed in industrially developed countries such as europe and the united states. As shown in fig. 1, the thermal transfer printing technology is a surface printing decoration technology in which thermal transfer paper or a thermal transfer film 11 printed with an ink pattern 12 is closely contacted with a printing material 13, the thermal transfer paper or the thermal transfer film is heated to a certain temperature, a certain pressure is applied, and the thermal transfer paper or the thermal transfer film 11 is maintained for a certain time, so that the ink pattern 12 on the thermal transfer paper or the thermal transfer film 11 is transferred onto the printing material 13 to form a final printed product.

In 1993, the application of the thermal transfer printing technology to the surface printing decoration of textiles and daily necessities first has been promoted in japan, and the emerging technology is rapidly popularized in developed countries. In the early 1996, heat transfer films and heat transfer machines were purchased from japan in China, and the heat transfer technology was introduced into china.

The thermal transfer printing technology is initially applied to textile printing production, along with rapid development of science and technology, the application field of the thermal transfer printing technology is wider and wider, and ceramics, metal, rubber, leather, wood and the like can be used for printing exquisite patterns by the thermal transfer printing technology. In recent 20 years, the application of thermal transfer printing technology to metal has been developed greatly, and the technology has been developed from metal members with small initial volume to metal plates and metal members with large surface areas such as security doors, fire doors, building aluminum profiles, steel and wood furniture, and the like.

Various decorative patterns imitating the natural wood grains or marble patterns are formed on the surfaces of the metal plate and the metal component through a heat transfer printing process, so that the method not only can meet the advocating of natural decorative effects of people, but also can save a large amount of forest resources and protect the environment. In addition, compared with wood, metal plates have the advantages of safety, fire resistance, high strength, light weight and the like, so that the metal plate heat transfer printing technology is more and more accepted and advocated by people. The heat transfer metal plate has wide application, and can be applied to various fields such as aluminum alloy doors and windows, security doors, fire doors, steel-wood furniture, file cabinets, computer shells, household appliances, metal ornaments and the like.

As one of the related prior art of the utility model, the domestic metal sheet mostly adopts the single heat transfer process, and its method is: opening an upper frame and a lower frame of a vacuum transfer printing bed, placing a metal plate to be transferred in the vacuum transfer printing bed, covering thermal transfer printing paper on the surface of the metal plate with the powder coating, closing the upper frame and the lower frame, vacuumizing the gas in the transfer printing bed by using a vacuum pump, tightly pressing a silica gel skin of the transfer printing bed on the outer side of the thermal transfer printing paper to enable the thermal transfer printing paper to be tightly attached to the surface of the metal plate, pushing the transfer printing bed into an oven, heating for 3-5 minutes at the temperature of 180-200 ℃, and transferring the pattern on the thermal transfer printing paper to the surface of the metal plate.

In practical applications, this method has the following disadvantages: the single-piece thermal transfer printing process has low automation degree, each procedure needs manual operation, the process flow is complicated, and the efficiency is extremely low; the true idle printing bed has large specification, frequent opening and closing of the upper frame and the lower frame, complex sealing device at the opening and closing part of the upper frame and the lower frame, poor sealing effect and easy air leakage, thereby influencing the transfer printing quality.

As a second prior art related to the present invention, in recent years, with the development of the thermal transfer technology, a single-roll type semi-continuous thermal transfer device for metal plate and strip has been developed on the basis of the single-roll type thermal transfer technology, and fig. 2 is a schematic view of the single-roll type semi-continuous thermal transfer device disclosed in patent CN201776980U, and is also a continuous thermal transfer device for steel plate and strip. The device comprises a hot box 25, a single heat transfer roller 22 arranged in the hot box, and a paper placing device 24-1 and a paper collecting device 24-2 of heat transfer paper 28 arranged on the upper part of the hot box, wherein a leading-in roller 23-1 and a leading-out roller 23-2 of a metal plate strip 27 are respectively arranged on two sides of the heat transfer roller, and the axes of the leading-in roller 23-1, the heat transfer roller 22 and the leading-out roller 23-2 are distributed in a V shape. The working principle is as follows: one end of the metal plate strip 27 is connected with an uncoiler, and the other end is connected with a coiler. The metal plate strip 27 is degreased, roughened, powder-sprayed and solidified, and then enters a thermal transfer printing device. The metal plate strip 27 and the thermal transfer paper 28 are wrapped around the circumference of the thermal transfer roller 22, and the thermal transfer paper 28 is located between the metal plate strip 27 and the thermal transfer roller 22, and thermal transfer is started. In actual production, the quality of the heat transfer can be controlled by adjusting parameters such as the temperature of the heat transfer roller 22, the temperature of the metal plate strip 27, the ambient temperature of the heat box 25, the pressure between the heat transfer roller 22 and the heat transfer paper 28 and the metal plate strip 27, the traveling speed of the metal plate strip 27 and the like.

Compared with a single-piece heat transfer printing technology, the metal plate strip single-roller type semi-continuous heat transfer printing technology can realize semi-continuous heat transfer printing of the metal plate strip, the automation degree and the working efficiency are improved, the transfer printing quality is further ensured, and the manual operation intensity is reduced. However, the technology has the disadvantages that due to the influence of the configuration of the whole line unit process equipment and the capability of the key equipment for powder spraying, curing and thermal transfer printing, the technology still stays in a semi-continuous production mode of single-roll continuous production and shutdown during roll change, and can only run at a low speed (the running speed is not higher than 10m/min), thereby restricting and influencing the further wide popularization of the thermal transfer printing technology in the production field.

SUMMERY OF THE UTILITY MODEL

The utility model provides a continuous high-speed heat-transfer seal device of multi-roll type can realize continuous, high-speed, the high-quality heat-transfer seal of metal slab band through the device to improve the degree of automation and the work efficiency of heat-transfer seal technique greatly, better assurance rendition quality promotes the development of heat-transfer seal technique, provides more powerful technical guarantee for the extensive popularization of this technique in the production field, and concrete technical scheme states as follows.

As the utility model discloses a high-speed transfer machine in succession of multi-roll, it includes: a box body as a heat preservation chamber; a plurality of parallel thermal transfer rollers arranged in the box body; the steering mechanism is arranged in the box body and is used for enabling the thermal transfer paper to be always positioned between the metal plate strip and the thermal transfer roller when the thermal transfer paper surrounds the thermal transfer roller; and a plurality of press roller groups for pressing the metal plate strip and the thermal transfer paper on the thermal transfer rollers, wherein the metal plate strip and the thermal transfer paper are sequentially wrapped on part of the roller surfaces of each thermal transfer roller.

In the multi-roll continuous high-speed transfer machine as described above, it is preferable that: the steering mechanism comprises a steering roller arranged above between two adjacent heat transfer rollers.

In the multi-roll continuous high-speed transfer machine as described above, it is preferable that: the number of the thermal transfer rollers is 3-7, and the thermal transfer rollers are metal rollers belonging to a thermal oil type thermal transfer roller or metal rollers belonging to an electromagnetic heating type thermal transfer roller.

In the multi-roll continuous high-speed transfer machine as described above, it is preferable that: the wrapping angle of the metal plate strip and/or the thermal transfer paper on the thermal transfer roller is larger than 180 degrees, preferably 200-260 degrees, and more preferably 230 degrees.

In the multi-roll continuous high-speed transfer machine as described above, it is preferable that: one heat transfer roller is correspondingly provided with one or more pressure roller groups, when one heat transfer roller is correspondingly provided with a plurality of pressure roller groups, the plurality of pressure roller groups are symmetrically distributed by taking a bisector of a wrapping angle of the metal plate strip on the heat transfer roller as a center or uniformly distributed in a wrapping area of the metal plate strip on the heat transfer roller, and when one heat transfer roller is correspondingly provided with one pressure roller group, a plurality of rollers forming the one pressure roller group are symmetrically distributed by taking the bisector of the wrapping angle of the metal plate strip on the heat transfer roller as the center.

In the multi-roll continuous high-speed transfer machine as described above, it is preferable that: the set of pressure rollers is closer to an initial wrapping point of the sheet metal strip on the heat transfer roller than a bisector of a wrapping angle of the sheet metal strip on the heat transfer roller.

In the multi-roll continuous high-speed transfer machine as described above, it is preferable that: the press roller group comprises a plurality of press rollers driven by the same cylinder, a plurality of heat transfer rollers are independently driven by a variable-frequency speed-regulating motor, and the roller diameter of each heat transfer roller is phi 2000-phi 3000mm, preferably phi 2000 mm.

In the multi-roll continuous high-speed transfer machine as described above, it is preferable that: the metal plate strip enters the box body from the metal plate strip inlet, turns by the guide-in roller to start to wrap the heat transfer roller, and leaves the box body from the metal plate strip outlet after leaving the last heat transfer roller and turns by the guide-out roller.

In the multi-roll continuous high-speed transfer machine as described above, it is preferable that: the thermal transfer printing paper winding machine is characterized by further comprising a thermal transfer printing paper unreeling machine and a thermal transfer printing paper winding machine, wherein the thermal transfer printing paper is unreeled by the thermal transfer printing paper unreeling machine, enters the box body to be wound on the thermal transfer printing roller, and passes through the thermal transfer printing paper winding machine to be wound after leaving the last thermal transfer printing roller.

In the multi-roll continuous high-speed transfer machine as described above, it is preferable that: further comprising: a metal plate belt inlet and a metal plate belt outlet which are arranged on the box body; a guide roller for guiding the metal strip from the metal strip entrance to the heat transfer roller; and the heat transfer paper unreeling machine and the heat transfer paper reeling machine are arranged on different sides of the box body together with the metal plate belt inlet and the metal plate belt outlet.

In the multi-roll continuous high-speed transfer machine as described above, it is preferable that: the diameter of the steering roller is smaller than that of the heat transfer roller.

In the multi-roll continuous high-speed transfer machine as described above, it is preferable that: the axes of the steering rollers are parallel to the axes of the heat transfer rollers, and the projection of the axes of the steering rollers on the axis connecting line of the two adjacent heat transfer rollers is positioned in the middle of the axis connecting line.

In the multi-roll continuous high-speed transfer machine as described above, it is preferable that: the steering mechanism arranged above the space between two adjacent heat transfer rollers comprises two steering rollers, the two steering rollers are parallel to each other, and the axis connecting line between the two steering rollers is parallel to the axis connecting line of the two adjacent heat transfer rollers.

In the multi-roll continuous high-speed transfer machine as described above, it is preferable that: the axes of the two adjacent heat transfer rollers and the axes of the two steering rollers form an isosceles trapezoid.

In the multi-roll continuous high-speed transfer machine as described above, it is preferable that: and an inverted isosceles triangle is formed among the axle center of one heat transfer roller and the axle centers of two adjacent steering rollers above the heat transfer roller.

The utility model discloses a be provided with steering mechanism and make metal plate area and thermal transfer paper wrap around and accomplish before next transfer roller after leaving a thermal transfer roller and turn to, guaranteed that thermal transfer paper is located between metal plate area and the thermal transfer roller all the time when wrapping around the thermal transfer roller, further improved the rendition quality from this.

Drawings

The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve only to explain the invention and not to constitute an undue limitation on the invention.

FIG. 1 is a schematic view of a thermal transfer technique, in which (a) shows before thermal transfer, (b) shows during thermal transfer, and (c) shows after thermal transfer.

FIG. 2 is a schematic view of a single-roll continuous thermal transfer apparatus.

FIG. 3 is a schematic view of a multi-roll continuous high-speed thermal transfer apparatus.

Fig. 4 is a schematic view of a thermal transfer paper unreeling machine.

Fig. 5 is a schematic view of a thermal transfer paper winder.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description of the present invention and do not require that the present invention must be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense, and may be, for example, either fixed or detachable; they may be directly connected or indirectly connected through intermediate members, and specific meanings of the above terms will be understood by those skilled in the art as appropriate.

The utility model provides a multi-roll type heat transfer device, the continuous high-speed heat transfer unit of metal plate area that it constitutes with other process equipment around the unit, the continuous high-speed heat transfer unit's of this metal plate area process flow is: uncoiling, sewing (welding), inlet looping, cleaning, passivating, drying, powder spraying, curing, thermal transfer printing, cooling, outlet looping, laminating and coiling. The thermal transfer printing equipment is used as main process equipment of the whole unit and plays a crucial role in the production speed and the product quality of the unit.

The continuous high-speed heat transfer printing unit for the metal plate strip can realize continuous and high-speed heat transfer printing of the metal plate strip, thereby greatly improving the automation degree and the working efficiency of a heat transfer printing technology, better ensuring the transfer printing quality, promoting the development of the heat transfer printing technology and providing more powerful technical support for the wide popularization of the technology in the production field.

The structure and operation of the multi-roll continuous high-speed thermal transfer apparatus will be described in detail with reference to fig. 3 to 5.

FIG. 3 is a schematic view of a multi-roll continuous high-speed thermal transfer apparatus in which a metal sheet strip 34 is fed from a curing furnace into a holding chamber 33, diverted by an introduction roll 35, and sequentially wrapped on roll surfaces of a plurality of heat transfer rolls 37 and a plurality of diverting rolls 39 in this order. The thermal transfer paper 32 is unwound from the transfer paper unwinding machine 31 and sequentially wound on the roll surfaces of the plurality of thermal transfer rollers 37 and the plurality of steering rollers 39. The metal plate belt 34 and the thermal transfer paper 32 are closely attached to the roll surfaces of the thermal transfer roller 37 and the steering roller 39 at a certain pressure under the plate belt tension and the transfer paper tension. The press roller group 36 provided around each heat transfer roller 37 is driven by the air cylinder to press the metal plate strip 34 and the heat transfer paper 32 wound around the roller surface of the heat transfer roller 37 to ensure uniform contact and close contact of the metal plate strip 34, the heat transfer paper 32 and the roller surface of the heat transfer roller 37. The metal plate strip 34 after passing through the plurality of heat transfer rollers 37 and completing the transfer is diverted by the delivery roller 30 to exit from the heat preservation chamber and enter the subsequent flow, and the heat transfer paper 32 after completing the transfer enters the transfer paper collection machine 38 for collection. A thermal transfer paper unreeling machine 31 and a thermal transfer paper reeling machine 38 are installed on the top of the heat-retaining chamber 33, and the thermal transfer paper 32 is contained within the metal plate strip 34, so that the thermal transfer paper 32 always enters the transfer device from between the metal plate strip 34 and the thermal transfer roller 37 and leaves the transfer device from between the metal plate strip 34 and the thermal transfer roller 37.

By adopting the mode of arranging the steering roller above the heat transfer roller, one defect that a plurality of heat transfer rollers are divided into an upper row and a lower row for multi-roller transfer printing is overcome: the thermal transfer paper on the upper heat-removal transfer roller is not positioned between the metal plate strip and the thermal transfer roller, and the thermal transfer quality of the upper heat-removal transfer roller is influenced to a certain extent, so that the thermal transfer effect is influenced.

In fig. 3, 3 heat transfer rollers are arranged in a row, located below, and 4 steering rollers 39 are arranged in a row, located above. In fact, as the number of thermal transfer rollers increases, the number of turn rollers may increase accordingly.

In general, the axis of the steering roller 39 and the axis of the heat transfer roller 37 are parallel to each other to function at the maximum efficiency, and the steering roller 39 may be a free roller that rotates by frictional force of the sheet belt or may rotate by applying a driving force as necessary.

As can be seen from fig. 3, two turning rollers 39 are disposed between two adjacent heat transfer rollers 37 and above the two heat transfer rollers, that is, after the metal plate strip 34 or the heat transfer paper 32 is wrapped around the first heat transfer roller 37 on the left, the two turning rollers 39 are sequentially used for turning, so that the heat transfer paper 32 is always located between the metal plate strip and the heat transfer rollers during transfer.

As can be seen from fig. 3, the two turning rollers are parallel to each other, and the axis connecting line between them is parallel to the axis connecting line between the two heat transfer rollers adjacent below, and the respective axes of the two heat transfer rollers adjacent to each other and the respective axes of the two turning rollers, the quadrangle formed by the connecting lines between these four is an isosceles trapezoid.

As can be seen from fig. 3, the distance between the two turning rollers can be adjusted according to the size of the wrap angle of the thermal transfer paper on the transfer roller, as a matter of course, the distance between the two turning rollers can be adjusted.

Although two turning rolls are arranged above and between two adjacent heat transfer rolls 37 to ensure the wrapping angle of the metal plate strip and the heat transfer paper on the heat transfer rolls as shown in fig. 3, depending on the requirement of the wrapping angle, one turning roll or three turning rolls may be arranged above and between two adjacent heat transfer rolls 37 to complete the turning task, and preferably, when one turning roll is arranged, the projection of the axis of the turning roll on the axis connecting line of the two adjacent heat transfer rolls 37 is located at the middle of the axis connecting line.

The multiple heat transfer rollers participating in the heat transfer can be arranged according to actual needs, although the axes of the three heat transfer rollers shown in fig. 3 are located at the same level and are designed into a row, the axes of the multiple heat transfer rollers can also be no longer located at the same level according to actual needs, and can be staggered with each other, for example, the axis of the middle heat transfer roller can be located at a higher level than the axes of the two heat transfer rollers, and of course, the turning roller is adjusted to be higher accordingly to ensure a proper wrap angle.

The heat transfer roller may be a heat transfer oil type heat transfer roller as needed, or an electromagnetic heating type heat transfer roller, and the heat transfer roller may be a metal roller whose surface is not required to be covered with a rubber layer, or a metal roller whose surface is covered with a rubber layer as needed. The number of the heat transfer rollers is multiple, but the number of the heat transfer rollers is preferably 3-7 in consideration of the whole, for example, 3, 4, 5 or 7, the specific number is related to the unit design speed, and the smaller the number is, the better the unit speed requirement is met.

As a steering mechanism for enabling the thermal transfer paper 32 to wrap the thermal transfer roller from between the metal plate strip 34 and the thermal transfer roller 37 all the time, the present specification takes two steering rollers located above any thermal transfer roller in fig. 3 as an example for explanation, but the present invention is not limited to this, and the present invention may be any steering structure that can complete the steering task of the thermal transfer paper and the metal plate strip and ensure that the thermal transfer paper completes the transfer work in a manner of being located between the metal plate strip and the thermal transfer roller, for example, any mechanical structure that enables the metal plate strip to turn over 180 degrees before the application of the present application, and the detailed discussion is not given here.

The utility model discloses a be provided with steering mechanism and make metal plate area and thermal transfer paper wrap around accomplishing 180 degrees before next transfer roller after leaving a thermal transfer roller and turn to, guaranteed that thermal transfer paper is located between metal plate area and the thermal transfer roller all the time when wrapping around the thermal transfer roller, further improved the rendition quality from this.

The heat preservation chamber 33 is made of a heat preservation material commonly used in a heating furnace and has a certain heat preservation effect, and a heating device is not required to be arranged inside the heat preservation chamber, and can be arranged according to needs.

In order to match the continuity and high speed of the metal plate strip heat transfer printing, the heat transfer printing paper unreeling machine adopts a turret type double-station form and is provided with an automatic edge deviation correcting device, so that the heat transfer printing paper is ensured to move transversely along with the edges of the strip steel constantly. Fig. 4 is a schematic diagram of a thermal transfer paper unreeling machine, a turntable 47 is mounted on a support 45 through a mandrel 46, two air inflation shafts 44 and 48 arranged oppositely at 180 ° are mounted on the turntable for mounting thermal transfer paper rolls 42 and 49, and a turning guide roller 43 is provided on the turntable 47 and the support 45 for guiding the direction of the thermal transfer paper when the thermal transfer paper is unreeled. The thermal transfer paper roll 49 on the air inflation shaft 48 is at a paper placing station, the thermal transfer paper roll 42 on the air inflation shaft 44 is at a waiting station, when the thermal transfer paper roll 42 is about to be placed, the thermal transfer paper 41 is pressed down to the thermal transfer paper roll 42 for quick bonding and cutting, the turntable 47 drives the air inflation shafts 44 and 48, the thermal transfer paper rolls 42 and 49 and the steering guide roller 43 which are arranged on the turntable to rotate 180 degrees, so that the thermal transfer paper roll 42 on the air inflation shaft 44 enters the paper placing station, the residual thermal transfer paper roll 42 on the air inflation shaft 48 enters the waiting station, a worker manually unloads the residual thermal transfer paper roll 42, a new thermal transfer paper roll is installed again, and the next station is waited for rotation.

The thermal transfer paper winder 37 adopts a fixed double-station form, as shown in fig. 5, the air shafts 52 and 54 are mounted on a bracket 53, and when the air shafts 54 wind, the wound paper rolls 51 on the air shafts 52 are manually unloaded and are in a waiting state; after the air shaft 54 finishes winding, the paper head is manually wound to the air shaft 52 for winding, the wound paper roll 55 on the air shaft 54 is unloaded and is in a waiting state, and the rotation is performed according to the above, so that the thermal transfer paper is continuously wound and collected.

In a word, as the thermal transfer paper unreeling machine and the thermal transfer paper reeling machine, conventional equipment sold on the market can be adopted.

The quality of the heat transfer printing of the metal plate strip mainly depends on three factors: thermal transfer temperature, thermal transfer time, and thermal transfer pressure. The multi-roller continuous high-speed thermal transfer apparatus is just under the study of ensuring the continuity, high speed and high quality of thermal transfer on the basis of ensuring the thermal transfer temperature, thermal transfer time and thermal transfer pressure, which will be described in turn below.

(1) Temperature of thermal transfer

The optimal heat transfer printing temperature of the metal plate strip is controlled to be 200-220 ℃, such as 221 ℃, 223 ℃, 225 ℃, 227 ℃, 228 ℃, 229 ℃ and the like. The temperature of less than 200 ℃ can reduce the transfer printing rate of the ink of the thermal transfer printing paper and influence the color and the durability of the transfer printing patterns; when the temperature is higher than 220 ℃, the phenomena of scorching, no luster and paper sticking of the transfer printing patterns can occur, thereby affecting the transfer printing quality.

For the close control heat transfer printing temperature in this patent, adopted heat conduction oil formula heat-transfer roller 37 that heat conduction efficiency is high, the heat conduction homogeneity is good, the control accuracy is high, wherein the conduction oil evenly distributed is in the shaft intermediate layer, because the conduction oil has good mobility to the local difference in temperature of shaft has been prevented too big. All the heat transfer rollers adopt independent heat transfer oil supply systems and temperature control systems, and conditions are provided for accurately and conveniently adjusting the transfer temperature. Of course, an electromagnetic heating type heat transfer roller based on electromagnetic induction current or the like may be used as required.

All thermal transfer rollers all encircle in heat preservation room 33, when carrying out the thermal transfer operation, except that belted steel and transfer printing paper business turn over department set up the window outside (be provided with belted steel entry, export and thermal transfer printing paper entry and export promptly), the remaining part in heat preservation room 33 all adopts enclosed construction, and insulation material is laid to the outer wall to guarantee the interior temperature of heat preservation room, reduce calorific loss, improve energy efficiency.

In addition, the metal strip is heated by itself as it exits the curing oven into the holding chamber 33. A metal plate strip temperature detection device is arranged at an inlet of the heat preservation chamber 33 to strictly control the temperature of the plate strip within the optimal transfer printing temperature range. In order to control the temperature of the plate strip within the range of 200-220 ℃, various known technologies can be adopted, for example, a metal plate strip temperature detection device is arranged at an inlet of a heat preservation chamber 33 to strictly control the temperature of the plate strip within the optimal transfer printing temperature range, under normal conditions, the temperature of the metal plate strip is slightly higher than the heat transfer printing temperature when the metal plate strip comes out of a curing furnace, and at this time, a cooling device behind the curing furnace needs to be started for cooling. The metal plate strip temperature detection device and the cooling device form electric closed-loop control to ensure the temperature range of the metal plate strip entering the thermal transfer printing device.

(2) Time of thermal transfer

The optimal heat transfer printing time of the metal plate strip is controlled to be 16-20 s, such as 16.5s, 17s, 17.5s, 18s, 18.5s, 19s and the like. Too short transfer time, for example, less than 16s, reduces the transfer rate of the ink of the thermal transfer paper, and affects the color and the durability of the transfer pattern; too long a transfer time, for example, above 20 seconds, can result in spreading of the ink, blurring of the pattern, and scarring, which can affect the quality of the transfer.

(3) Pressure of thermal transfer printing

The factors influencing and determining the thermal transfer pressure include the tension of the metal plate strip 34 itself, and the pressing force of the press roller group 36 on the metal plate strip 34, the thermal transfer paper 32 and the thermal transfer roller 37.

The tension of the metal strip 34 itself can be adjusted by adjusting the tension devices (not shown) before and after the thermal transfer device, and sufficient tension is provided to ensure that the metal strip 34 presses the thermal transfer paper 32 against the roll surface of the thermal transfer roller 37 without plastically deforming the metal strip 34. In order to avoid additional tension generated by the metal plate strip 34 when the metal plate strip is wrapped around a plurality of heat transfer rollers 37, the metal plate strip 34 extends to influence the transfer quality, all the heat transfer rollers 37 are independently driven by a variable-frequency speed-regulating motor and independently adjusted to control the output torque of the heat transfer rollers to be balanced with the frictional resistance torque of the heat transfer rollers 37, meanwhile, tension detection devices are respectively arranged at the inlet and the outlet of the transfer device, the tension detection values and the front and rear tension devices form closed-loop control, and the inlet tension and the outlet tension are always balanced and stable.

The pressing force of the press roller group 36 against the metal plate strip 34, the thermal transfer paper 32, and the thermal transfer roller 37 can be adjusted by adjusting the cylinder pressure of the press roller group 36, and a driving method in which one cylinder is provided for each press roller group can be adopted.

In addition to the above three main factors, in order to further improve the transfer effect, the spatial layout of the thermal transfer roller, the roller diameter, the number of rollers, and the thermal transfer speed need to be considered.

When a metal plate strip passes through the thermal transfer device at a certain running speed, the temperature of the plate strip and the temperature of the thermal transfer roller are strictly controllable, and reasonable spatial layout of the thermal transfer roller is required to ensure that the plate strip, the transfer paper and the thermal transfer roller are tightly attached and enough transfer time is ensured.

As shown in fig. 3, each thermal transfer roll is provided with 2 sets of nip rollers 36 along the roll surface, the 2 sets of nip rollers 36 being located at or near the entrance and exit of the sheet metal strip 34 on the thermal transfer roll, respectively. It is of course also possible to optionally bring the set of press rollers closer to the intersection of the central bisector of the angle of wrap B of the sheet metal strip 34 on the heat transfer roller with the roller surface. The general arrangement principle of the press roller group is to make the press rollers be uniformly arranged on the circular arc surface surrounding the metal plate strip along the heat transfer roller as much as possible, so as to make the pressing fit between the metal plate strip, the heat transfer paper and the heat transfer roller more uniform. From fig. 3, each set of the compression roller set 36 includes 3 compression rollers, and certainly, more compression rollers can be adopted according to actual needs, and the surface of the compression roller is coated with a high temperature resistant adhesive layer, so that the surface of the compression roller is uniformly and tightly attached to the surface of the metal plate strip, and the completeness and uniformity of the transfer printing patterns are further ensured.

In principle, when the running speed of the metal plate strip is fixed, the larger the roller diameter of the heat transfer roller is, the smaller the roller number is, the more beneficial the shortening of the length of the transfer printing device is, the simplification of the equipment of the heat transfer printing device is and the improvement of the reliability of the heat transfer printing device is. However, the diameter of the roller cannot be too large in consideration of the difficulty in processing, transportation, installation, maintenance, and the like of the thermal transfer roller. The utility model discloses well roller diameter of preferred heat transfer roller is phi 2000 ~ phi 3000mm, for example 2200mm, 2300mm, 2500mm, 2800mm etc. under the condition that satisfies the production requirement, more prefers that the roller diameter is less. For example, in FIG. 5, a roll diameter of 2000mm is preferred.

Based on the spatial layout, the roll diameter and the roll number analysis of the thermal transfer roll, the thermal transfer speed of the metal plate strip can reach about 70m/min at most, and the thermal transfer speed of 10m/min at most of the existing production line is fundamentally changed.

The wrap angle B of the metal plate strip or the thermal transfer paper on the thermal transfer roller is in the range of 260 DEG to 200 deg.

The thermal transfer paper unreeling machine 31 and the thermal transfer paper reeling machine 38 are installed at the top of the heat preservation chamber 33 at positions required to ensure that the thermal transfer paper 32 is always contained in the metal plate strip 34, that is, the thermal transfer paper 32 always enters the transfer device from between the metal plate strip 34 and the thermal transfer roller 37 and leaves the transfer device from between the metal plate strip 34 and the thermal transfer roller 37. In principle, after the heat transfer roller is arranged, the metal plate strip and the heat transfer paper at the inlet and the outlet are close to the heat transfer roller as much as possible, and the wrap angle of the metal plate strip and the heat transfer paper is increased.

The technical personnel in this field know, the thermal transfer technique is based on the printing ink sublimation and is soaked, and the sublimed prerequisite of printing ink is exactly to heat, and under the uniform temperature, the printing ink sublimation needs the certain time with soaking the stock, and this time is thermal transfer time promptly, and it is the biggest factor that limits the unit acceleration, for under the prerequisite of guaranteeing enough thermal transfer time, improves unit speed, for this reason, the utility model discloses the people thinks to adopt the multiple roll form, lengthens the laminating length of metal slab band and thermal transfer roller as far as possible in limited space. Namely the utility model discloses a continuous high-speed heat-transfer seal device of multiple roll-type has realized belted steel heat-transfer seal technology's continuity, high-speed and high-quality on the basis of guaranteeing rendition temperature, rendition time and rendition pressure, has improved belted steel heat-transfer seal technology's degree of automation and work efficiency greatly, and better assurance rendition quality promotes the development of heat-transfer seal technology, provides more powerful technical guarantee for this technique is in the extensive popularization in production field.

In addition, although the diameters of the plurality of thermal transfer rollers in fig. 3 of the present invention are the same, they may be designed differently according to actual needs.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (15)

1. A multi-roll continuous high-speed transfer machine comprising:

a box body as a heat preservation chamber;

a plurality of parallel thermal transfer rollers arranged in the box body;

the steering mechanism is arranged in the box body and is used for enabling the thermal transfer paper to be always positioned between the metal plate strip and the thermal transfer roller when the thermal transfer paper surrounds the thermal transfer roller; and

a plurality of press roller groups for pressing the metal plate strip and the thermal transfer paper against the thermal transfer roller,

the metal plate strip and the thermal transfer paper are sequentially wrapped on part of the roll surface of each thermal transfer roll.

2. The multi-roll continuous high-speed transfer machine according to claim 1,

the steering mechanism comprises a steering roller arranged above between two adjacent heat transfer rollers.

3. The multi-roll continuous high-speed transfer machine according to claim 1,

the number of the thermal transfer rollers is 3-7,

the heat transfer roller is a metal roller belonging to a heat transfer oil type heat transfer roller or a metal roller belonging to an electromagnetic heating type heat transfer roller.

4. The multi-roll continuous high-speed transfer machine according to claim 1,

the wrapping angle of the metal plate strip and/or the thermal transfer paper on the thermal transfer roller is 200-260 degrees.

5. The multi-roll continuous high-speed transfer machine according to claim 1,

one heat transfer roller is correspondingly provided with one or more pressure roller groups,

when one heat transfer roller is correspondingly provided with a plurality of pressure roller groups, the plurality of pressure roller groups are symmetrically distributed or uniformly distributed in a wrapping area of the metal plate strip on the heat transfer roller by taking a bisector of a wrapping angle of the metal plate strip on the heat transfer roller as a center,

when one heat transfer roller is correspondingly provided with one press roller group, a plurality of rollers forming the press roller group are symmetrically distributed by taking a bisector of a wrapping angle of the metal plate strip on the heat transfer roller as a center.

6. The multi-roll continuous high-speed transfer machine according to claim 1,

the set of pressure rollers is closer to an initial wrapping point of the sheet metal strip on the heat transfer roller than a bisector of a wrapping angle of the sheet metal strip on the heat transfer roller.

7. The multi-roll continuous high-speed transfer machine according to claim 1,

the press roller group comprises a plurality of press rollers driven by the same cylinder,

the plurality of thermal transfer rollers are separately driven by a variable-frequency speed-regulating motor,

the roller diameter of the thermal transfer roller is phi 2000-phi 3000 mm.

8. The multi-roll continuous high-speed transfer machine according to claim 1, further comprising a lead-in roll and a lead-out roll, a metal strip entrance and a metal strip exit provided on the casing,

the metal strip enters the box body from the metal strip inlet, turns by the guide-in roller to start wrapping on the heat transfer rollers, and leaves the last heat transfer roller, turns by the guide-out roller and leaves the box body from the metal strip outlet.

9. The multi-roll continuous high-speed transfer machine according to claim 1, further comprising a thermal transfer paper unreeling machine and a thermal transfer paper reeling machine, wherein the thermal transfer paper is unreeled by the thermal transfer paper unreeling machine, enters a box body to be wound on the thermal transfer rollers, and is reeled by the thermal transfer paper reeling machine after leaving the last thermal transfer roller.

10. The multi-roll continuous high-speed transfer machine according to claim 9,

further comprising: a metal plate belt inlet and a metal plate belt outlet which are arranged on the box body;

a guide roller for guiding the metal strip from the metal strip entrance to the heat transfer roller; and

a delivery roll for delivering the metal strip from the heat transfer roll to the metal strip outlet,

the thermal transfer paper unreeling machine and the thermal transfer paper reeling machine are arranged on different side surfaces of the box body together with the metal plate strip inlet and the metal plate strip outlet.

11. The multi-roll continuous high-speed transfer machine according to claim 2,

the diameter of the steering roller is smaller than that of the heat transfer roller.

12. The multi-roll continuous high-speed transfer machine according to claim 2,

the axis of the steering roller and the axis of the heat transfer roller are parallel to each other,

the projection of the axle center of the steering roller on the axle center connecting line of the two adjacent heat transfer rollers is positioned in the middle of the axle center connecting line.

13. The multi-roll continuous high-speed transfer machine according to claim 2,

the steering mechanism disposed above between the adjacent two heat transfer rollers includes two steering rollers,

the two steering rollers are parallel to each other, and the axis connecting line between the two steering rollers is parallel to the axis connecting line of the two adjacent heat transfer rollers.

14. The multi-roll continuous high-speed transfer machine according to claim 13,

the axes of the two adjacent heat transfer rollers and the axes of the two steering rollers form an isosceles trapezoid.

15. The multi-roll continuous high-speed transfer machine according to claim 13,

and an inverted isosceles triangle is formed among the axle center of one heat transfer roller and the axle centers of two adjacent steering rollers above the heat transfer roller.

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