Electro-aluminum hot stamping process operation

With the continuous improvement of people’s material and cultural living standards, people’s demands for printed materials are also getting higher and higher. In particular, the products after electro-aluminum hot stamping are even more colorful and are favored by users, which makes the electro-aluminum hot stamping process widely Use and promote.

First, the performance of aluminum

Electro-aluminum is produced by a professional manufacturer. It uses a polyester film as a carrier. It is first coated with a dye layer, then vacuum-plated with an aluminum layer, and finally with an adhesive layer. After inspection, the plastic rewinding supply market has been examined. Currently available in the market are gold, silver, orange, light blue, red, green and other colors, except for the color of aluminum, there are also 1, 8th, 12th, 15th, etc. , Different models, performance and use requirements are not the same. No. 1 galvanized aluminum is suitable for hot stamping of paper, leather, linoleum, plexiglass and hard plastics, and silk, with a hot stamping surface temperature of 80-95°C, adapting to fast hot stamping. No. 8 galvanized aluminum is suitable for hot stamping of paper, leather and linoleum, hot stamping literal temperature of 70-90°C, and speed of 18-30 sheets per minute. No. 12 galvanized aluminum is suitable for hot stamping of plexiglass, hard plastic and some glossy papers. The hot stamping surface temperature is 70-85°C, and the speed is 18-30 sheets per minute. No. 15 anodized aluminum is suitable for hot stamping of soft plastics. The hot stamping surface temperature is 60-80°C, and the speed is 18-22 shots per minute. Electrochemical aluminum should be stored in a cool and dry place, gently and gently, not heavy pressure, pay attention to moisture, heat, sun, grease.

二、Anodized aluminum hot stamping equipment

Anodized aluminum stamping equipment, in addition to advanced dedicated stamping equipment, at present, most of the domestic manufacturers are using disc machine, square box machine for conversion, remove the ink station, ink fountain, transfer ink part, install the stamping of electro-aluminum The electric hot plate, the anodized aluminum mounting frame, the anodized aluminum feeding roller, the anodized aluminum receiving frame and the control of the material spacing gear and other parts, the aluminum foil hot stamping machine has developed from a single layer hot stamping to a three or four layer hot stamping , It has three or four groups of electric aluminum institutions, which are composed of ratchet gears with adjustable strokes. Simply pull out the bridge gears between each group and send them to the rollers, and you can easily choose the number of layers to use. Completing several different hot stamping surfaces for complex prints with multiple copies and multiple hot stamping surfaces.

Third, the aluminum foil hot stamping operation

The effect of hot stamping is related to the quality of the corroded plate. Hot stamping must require a clear, clear surface, and a deeper surface than the printed version. It is best to use a copper plate for hot stamping.

1, the installation of hot stamping version

The hot stamping plate should be installed in the middle of the hot plate as much as possible so that the temperature during the hot stamping can be kept even. The installation of the hot stamping plate is generally determined according to the reasonable use of the anodized aluminum and the convenience of the hot stamping operation.

Prior to loading, the surface of the electric heating plate should be cleaned, and some markings should be placed on the back of the printing plate. A piece of cloth slightly larger than the hot stamping plate coated with milky white glue (or leather glue) should be loaded according to the determined printing plate. The position and method of the plate are pasted onto a hot plate, and the hot plate is pasted on the top of the electric plate. Put some hard paper on the plate, close the plate, heat the plate and heat it 80~90°C, hot press 15 About a minute or so, the hot stamping plate is firmly attached to the hot plate. In the midst of reprinting the hot stamping version, it must be carried out under the condition that the electric heating plate is completely cooled. If the hot plate is replaced with a temperature, the hot stamping plate can be replaced, which can easily cause the hot stamping plate to move around.

2, plate pressure adjustment and pad

Stick a piece of 100-gram or more coated paper on the plate with adhesive tape, press and press the sample with carbon paper, adjust the plate pressure according to the sample, until the sample is clear and the pressure is even. Determine the stamping rules of the stamping materials according to the printed samples, and paste some soft and hard cushions on the plate according to the stamping conditions.

If it is found that the partial hot stamping and flowering are not available during the trial printing, thin paper can be used to adjust the flat plate at the place.

3, temperature control of electric heating plate

The quality of the aluminum foil stamping and temperature control are critical. Usually, 600-800W electric heating wire is contained in the electric heating plate. The temperature of the transformer is controlled by a voltage regulator. When the voltage of the general transformer is indicated as 100-120V, the temperature of the electric heating plate can reach 75- 85°C, suitable for hot stamping of No. 8 anodized aluminum. When the voltage regulator is indicated as 90-100V, the temperature of the hot plate can reach 65-80°C, which is suitable for the hot stamping of No. 15 anodized aluminum.

4, cutting and installation of anodized aluminum

The use of anodized aluminum should be based on the type of stamping to choose. Cutting aluminum should be calculated accurately, that is, no waste, but also meet the hot stamp surface, if necessary and leave enough space.

The general methods used in the production of anodized aluminum are: 1 hot stamping of a single product and hot stamping of a printed surface. 2 When a single piece of product is stamped on multiple occasions, if the area of ​​the printing surface, such as a hot stamping, is large and cannot be fully utilized, the hot stamping method of multiple blocks is adopted. 3 irregular products side oblique hot stamping, irregular printing surface can be based on the actual situation or side oblique angle hot stamping, in order to reduce the consumption of aluminum. More than 4 kinds of products are compound hot stamping, and several printing surfaces are compounded, making full use of materials and can be completed at one time. 5 Hot stamping again.

The installation of anodized aluminum shall not be too tight or too loose. The pressure of the pressure roller and the tension of the wind-up roller should be properly adjusted. Anodized aluminum should not be too close to the electric heating plate, and the aluminum foil and electric heating plate need to be raised with a paper circle to avoid overheating of the aluminum.

5, electro-aluminum hot stamping prone to failure and troubleshooting

1 In the surface of the printing material ink layer hot stamping, to prevent the hot stamping pull off the ink layer, the ink should use resin type, the ink layer should not be too strong, the additive should use the transfer ink, avoid oil, Varnish. Better paper quality, such as easy to tear when loose foam hot stamping. 2 Hot Stamping Plates After a long period of continuous hot stamping, the plateaus tend to have a sticky, sticky version of the pellets. Lightweight charcoal must be used to dip lightly on the surface. Hot stamping papers should be gradually removed to prevent the pens from getting stuck. 3 Wrinkles in writing or poor adhesion, is caused by too low a temperature, the temperature of the hot plate should be raised before hot stamping, if the flower is still produced, the pressure of the machine may be insufficient, and the pressure of the platen needs to be adjusted or added. Thick pad. 4 The hot stamping of handwriting has a worsening of heavy metal luster, which is caused by too high temperature. The temperature of the hot plate should be reduced. At the same time, attention should be paid to playing less empty cars and unnecessary parking in the middle, otherwise it is easy to increase the heat of the hot plate. If it is necessary to stop the electric plate switch should be disconnected. 5 In the hot stamping process, the writing is not clear. The installation of the aluminum foil is loose, and the way of uncovering the paper is not correct. The pressure of the reeling drum and the tension of the rewinding drum should be properly adjusted, or the way of uncovering the paper should be changed. 6 hot stamping strokes in the absence of pen strokes, is the installation of anodized aluminum is too tight, tension is too tight, the clamping ring of the coiling device should not be too tight clamping aluminum, try to relax the tension, so that the aluminum slowly. 7 Lai Jin appears in bronzing, which is too close to the electro-aluminum and the hot plate, or the hot stamp plate is etched too shallowly. The aluminum foil should be separated from the heating plate by a ring pad, or the hot stamping plate should be trimmed. 8 product surface finishing. The floating gold can be scraped with a yellow plate paper, Lai Jin is glued with a rubber cloth or scraped with a blade, or scrubbed with alcohol.

In short, there are many hot stamping faults in AI. There are many reasons for this. It is not confined to the hot stamping temperature. In terms of pressure speed, it is necessary to change the printing materials or replace the galvanized aluminum and other reasons in order to solve the problem better. .

Hubei Qinyin Printing Factory

Reprinted from: Printing Information