CN212400601U - Metal decorating machine with sheet preheating function - Google Patents

Abstract

The utility model discloses an iron printing machine with sheet preheating function, which comprises a power supply circuit, a printing machine, an automatic feeder, a conveying belt for conveying iron sheets from the automatic feeder to the printing machine, a feeder control circuit and a preheating device, wherein the preheating device comprises an infrared lamp box and a control circuit, the infrared lamp box is arranged above the conveying belt, and the infrared lamp box faces the conveying belt; the infrared lamp box is connected with the power circuit through the control circuit. The utility model discloses a preheating device simple structure, equipment cost and product cost are lower.

Description

Metal decorating machine with sheet preheating function

[ technical field ]

The utility model relates to an iron printing machine especially relates to an iron printing machine with sheet preheats function.

[ background art ]

In the production of tinplate printing, the drying of paint and ink is a complex physicochemical reaction process. Because tinplate is insoluble in water and does not adsorb solvents, the surface of a metal sheet is primed and dried before entering an iron printing machine for ink coating, but if the drying effect of the surface of the coating is not ideal, the surface is sticky, and the film is not completely solidified, the later printing effect is influenced, if the coating and the ink are not dried thoroughly, the paint film is tender, and finally the surface pattern is easy to discolor or scratch, and particularly when the tinplate is used as a container material for canned food or beverage and the like, the food or the beverage is directly contacted with the tinplate and then the taste is changed before the shelf life is reached, so that the body health is influenced.

Therefore, it is clearly important for the entire printing process that the metal sheet is subjected to the necessary preheating treatment during the conveyance before printing, which not only improves the printability of the sheet, but also improves the quality of the print at a later stage.

The invention with the application number of CN201710692155.X discloses an iron printing machine with a sheet preheating function, which comprises a feeder, a cleaning device and a material pushing mechanism, wherein a sheet preheating device is arranged between the cleaning device and the material pushing mechanism and comprises supporting legs and a drying box, and a feeding port and a discharging port are longitudinally arranged on the drying box; a rubber roller is connected between the machine body plates on the two sides of the cleaning device, and a rubber roller end face gear is arranged on the driving side; an upper row of hot air pipes, a lower row of hot air pipes and a row of support shafts are arranged in the drying box, and pad wheels and upper prevention fly swiftly magnetic wheels are sleeved on the support shafts; the bottom surface of the sheet material clings to the top surface of the pad wheel and enters from a feeding hole of the drying box, and is conveyed to a material pushing mechanism from a discharging hole after being preheated; a fan is arranged on the supporting plate below the drying box, the air outlet of the fan is connected with the heat transfer box, and a hot air pipe is arranged between the heat transfer box and the drying box; a ventilation pipe is arranged between the bottom of the drying box and the air inlet of the fan; a supporting shaft synchronous driving mechanism is arranged on the driving side of the drying box; the driving side of the cleaning device is provided with a span driving mechanism which is synchronous with the supporting shaft driving mechanism. The preheating device of the invention has a complex structure, and increases the equipment cost and the product cost.

[ summary of the invention ]

The to-be-solved technical problem of the utility model is to provide an iron printing machine with sheet preheats function, preheating device simple structure.

In order to solve the technical problem, the utility model adopts the technical scheme that the iron printing machine with the sheet preheating function comprises a power supply circuit, a printing machine, an automatic feeding machine, a conveying belt for conveying iron sheets from the automatic feeding machine to the printing machine, a feeding machine control circuit and a preheating device, wherein the preheating device comprises an infrared lamp box and a control circuit, the infrared lamp box is arranged above the conveying belt, and the infrared lamp box faces the conveying belt; the infrared lamp box is connected with the power circuit through the control circuit.

The iron printing machine with the sheet preheating function comprises a power supply circuit, an infrared lamp box and a control circuit, wherein the power supply circuit comprises an alternating current power supply circuit and a direct current control power supply circuit; the control branch circuit comprises a relay circuit and a contactor, the relay circuit comprises a starting button, a closing button and an intermediate relay, the relay circuit is connected with a power supply circuit of the relay, and the relay power supply circuit is connected with a direct-current control power supply circuit; the infrared lamp unit is connected with an alternating current power supply circuit through a contact of a contactor, a coil of the contactor is connected with a first normally open contact of an intermediate relay in series and then connected with a contactor power supply circuit, and the contactor power supply circuit is connected with the alternating current power supply circuit; the starting button, the closing button and a coil of the intermediate relay are connected in series, and a second normally open contact of the intermediate relay is connected in parallel with the starting button.

The iron printing machine with the sheet preheating function comprises a control sub-circuit, wherein the control sub-circuit comprises a thermal relay, the thermal relay is connected between the infrared lamp unit and the contact of the contactor in series, and the normally closed contact of the thermal relay is connected in the corresponding relay circuit in series.

The tin printing machine with the sheet preheating function comprises a relay circuit, wherein the relay circuit comprises a first indicator light, and the first indicator light is connected with a coil of an intermediate relay in parallel.

In the metal decorating machine with the sheet preheating function, the control circuit comprises the feeder starting signal switch and the second relay, and the feeder starting signal switch is connected with the coil of the second relay in series and then is connected in the relay power supply circuit; and the power supply circuit of the contactor is connected with an alternating current power supply circuit through a normally open contact of the second relay.

In the metal decorating machine with the sheet preheating function, the control circuit comprises the emergency stop switch and the emergency stop relay, and the emergency stop switch is connected with the coil of the emergency stop relay in series and then is connected with the power circuit; the relay power supply circuit is connected with the direct current control power supply circuit through a normally open contact of the emergency stop relay.

The utility model discloses a preheating device simple structure, equipment cost and product cost are lower.

[ description of the drawings ]

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a front view of an iron decorating machine according to an embodiment of the present invention.

Fig. 2 is a top view of the metal decorating machine according to the embodiment of the present invention.

Fig. 3 is a schematic diagram of a main circuit of a preheating device of an iron printing machine according to the embodiment of the present invention.

Fig. 4 is a schematic diagram of a relay power supply circuit according to an embodiment of the present invention.

Fig. 5 is a schematic diagram of a power supply circuit of a contactor according to an embodiment of the present invention.

[ detailed description of the invention ]

The embodiment of the utility model provides a structure and principle of tin printing machine are shown as figure 1 to 5, including power supply circuit, printing machine 1, autoloader 2, from autoloader to printing machine carry conveyer belt 3, feeder control circuit and preheating device of iron sheet. The power supply circuit comprises a 380V alternating current power supply circuit and a 24V direct current control power supply circuit which are of a three-phase four-wire system

The preheating device comprises an infrared lamp box 4 and a control circuit, wherein the infrared lamp box 4 comprises 4 infrared lamp units G01, G02, G03 and G04, the infrared lamp units G01, G02, G03 and G04 are mounted above the conveying belt through a support 5, and the illumination direction of the infrared lamp box faces the conveying belt. 4 infrared lamp units G01, G02, G03 and G04 of the infrared lamp box are connected with a 380V alternating current power supply circuit through a control circuit.

The control circuit comprises a relay power supply circuit, a contactor power supply circuit, a feeder starting signal switch S1, a relay KA1, an emergency stop switch SB10, an emergency stop relay KA10 and 4 control sub-circuits corresponding to the infrared lamp units, wherein the 4 control sub-circuits have the same structure, and the control sub-circuit of the infrared lamp unit G01 is taken as an example for explanation; the relevant part of the remaining 3 control sub-circuits is connected in parallel with the corresponding part of the control sub-circuit of the infrared lamp unit G01.

The emergency stop switch SB10 is connected in series with the coil of the emergency stop relay KA10 and then connected with a 24V direct current control power supply circuit. The relay power supply circuit is connected with a 220V alternating current power supply circuit through a normally open contact of the emergency stop relay KA 10.

The feeder starting signal switch S1 is connected in series with the coil of the relay KA1 and then connected in the relay power supply circuit, and the contactor power supply circuit is connected with the 220V alternating current power supply circuit through the normally open contact of the relay KA 1.

The control sub-circuit of the infrared lamp unit G01 includes a first relay circuit and a contactor KM 11.

The first relay circuit comprises a starting button SB11, a closing button ST11, a thermal relay FR11, an indicator light H11 and an intermediate relay KA11, the first relay circuit is connected with a relay power supply circuit, and the relay power supply circuit is connected with a 24V direct current control power supply circuit. The normally closed contacts of the start button SB11, the close button ST11 and the thermal relay FR11 are connected in series with the coil of the intermediate relay KA11, the second normally open contact of the intermediate relay KA11 is connected in parallel with the start button SB11, and the indicator lamp H11 is connected in parallel with the coil of the intermediate relay KA 11.

The infrared lamp unit G01 is connected with a 380V alternating current power supply circuit through a contact of a contactor KM11, and a thermal relay FR11 is connected in series between the infrared lamp unit and the contact of the contactor KM 11.

And a coil of the contactor KM11 is connected in series with a first normally open contact of the intermediate relay KA11 and then is connected with a contactor power supply circuit.

The utility model discloses above embodiment preheating device theory of operation explains with infrared lamp unit G01:

when the starting button SB11 is pressed to start, the intermediate relay KA11 is electrified, two normally open contacts of the intermediate relay KA11 are closed, and the intermediate relay KA11 is self-locked.

When the automatic feeding machine of the printing machine starts feeding, the feeding machine starting signal switch S1 is closed, the relay KA1 is electrified, the normally open contact of the relay KA1 is closed, the contactor power supply circuit is connected with the 220V alternating current power supply circuit through the normally open contact of the relay KA1, the main circuit of the infrared lamp unit G01 is conducted, the infrared lamp unit G01 is lightened, and the preheating device heats the iron sheet on the conveying belt. The operator presses the start button SB or the off button ST according to the required heating amount of the iron pieces on the conveyor belt, and selects one or more of the infrared lamp units G01, G02, G03, and G04.

When the metal decorating machine breaks down, as long as the emergency stop switch SB10 is pressed, the coil of the emergency stop relay KA10 is powered off, the normally open contact of the emergency stop relay KA10 is disconnected to enable the power supply circuit of the relay to be powered off, the intermediate relays KA1, KA11, KA12, KA13 and KA14 are controlled to be powered off, and all the intermediate relays are stopped to work; meanwhile, the relay KA1 is powered off, the normally open contact of the relay KA1 is disconnected, the relay power supply circuit and the 24V direct current control power supply circuit are disconnected and powered off, the contacts of the 4 contactors are disconnected, and the main circuits of the infrared lamp units G01, G02, G03 and G04 are all disconnected.

The utility model discloses above embodiment has sheet preheat function's tin printing machine directly installs the infrared lamp additional in printing machine feeder rear end and printing machine front end, heats in the twinkling of an eye for the tinplate that passes through. The infrared lamp is formed by extending a tungsten filament into a gas-filled quartz tube. The tungsten filament generates heat and heats the gas in the quartz tube under the alternating voltage, thereby generating infrared radiation. The tin plate surface is heated instantaneously under the action of infrared rays, so that the temperature of the tin plate surface rises, and the coating activity of the tin plate surface coating is activated. In order to ensure that no iron passes through the heating device to damage the equipment, when the printing machine stops printing, the feeding machine conveying control circuit is disconnected, and the main power supply of the infrared lamp is also disconnected to achieve automatic control.

The metal decorating machine of the embodiment of the utility model does not need to build a heat preservation room, reduces the occupied space, has simple structure of the preheating device, and has lower equipment cost and product cost; the temporary adjustment plan does not need to wait for a forklift to take materials from a heat preservation room or wait for temperature rise, and the production efficiency is high; the adhesive force between the ink and the coating is increased during printing, so that the printing speed is not influenced by the temperature of the iron sheet, the loss of appearance patterns is reduced, and the product quality is good.

Claims (6)

1. An iron printing machine with a sheet preheating function comprises a power supply circuit, a printing machine, an automatic feeder, a feeder control circuit and a preheating device, and is characterized by comprising a conveying belt for conveying iron sheets from the automatic feeder to the printing machine, wherein the preheating device comprises an infrared lamp box and a control circuit, the infrared lamp box is arranged above the conveying belt, and faces the conveying belt; the infrared lamp box is connected with the power circuit through the control circuit.

2. The machine according to claim 1, wherein the power circuit comprises an alternating current power circuit and a direct current control power circuit, the infrared lamp box comprises a plurality of infrared lamp units, and the control circuit comprises a relay power circuit, a contactor power circuit and a control subcircuit corresponding to the infrared lamp units; the control branch circuit comprises a relay circuit and a contactor, the relay circuit comprises a starting button, a closing button and an intermediate relay, the relay circuit is connected with a power supply circuit of the relay, and the relay power supply circuit is connected with a direct-current control power supply circuit; the infrared lamp unit is connected with an alternating current power supply circuit through a contact of a contactor, a coil of the contactor is connected with a first normally open contact of an intermediate relay in series and then connected with a contactor power supply circuit, and the contactor power supply circuit is connected with the alternating current power supply circuit; the starting button, the closing button and a coil of the intermediate relay are connected in series, and a second normally open contact of the intermediate relay is connected in parallel with the starting button.

3. The machine according to claim 2, wherein the control branch circuit comprises a thermal relay, the thermal relay is connected in series between the infrared lamp unit and the contact of the contactor, and the normally closed contact of the thermal relay is connected in series in the corresponding relay circuit.

4. The metal decorating machine with the sheet preheating function according to claim 2, wherein the relay circuit includes a first indicator lamp, and the first indicator lamp is connected in parallel with the coil of the intermediate relay.

5. The metal decorating machine with the sheet preheating function according to claim 2, wherein the control circuit comprises a feeder starting signal switch and a second relay, and the feeder starting signal switch is connected in series with a coil of the second relay and then connected in the relay power supply circuit; and the power supply circuit of the contactor is connected with an alternating current power supply circuit through a normally open contact of the second relay.

6. The metal decorating machine with the sheet preheating function according to claim 2, wherein the control circuit comprises an emergency stop switch and an emergency stop relay, and the emergency stop switch is connected with a coil of the emergency stop relay in series and then connected with a direct current control power supply circuit; the relay power supply circuit is connected with the power supply circuit through a normally open contact of the emergency stop relay.

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