Metal signs are mainly based on copper, iron, aluminum, zinc alloy, lead-tin alloy and other raw materials, through stamping, die-casting, etching, printing, enameling, imitation enameling, baking paint and other crafts, made into nameplates, badges, badges, awards, keychains, cap badges, hat clips, money clips, commemorative medallions, commemorative coins, craft tags, cufflinks, photo frames, cell phone charms, tie clips, belt headers, hangtags, bottle openers, and other Craft jewelry and all kinds of metal signs, metal nameplates and other different categories of metal signage products. 1、Horizontal signage: the whole proportion of the horizontal is relatively long. Generally the whole side is utilized for advertising signs. Generally can be seen on the walls of small stores and large buildings.
2. Vertical signage: the whole proportion of the vertical is relatively long. Generally the whole side is utilized as an advertising sign.
3, protruding signage: protruding from the wall of the building, in addition to the back of the whole side or have two sides of the wall in the case of both sides are utilized as advertising carriers of the signage.
4, the ground column-shaped signage: marking the ground on some fixed structure of the horizontal, vertical, three-dimensional shape of the sign.
5, roof-shaped signage: refers to the roof of a building set some fixed structures, and hanging or sticking on the plate-shaped live cubic or phantom signage. 1, smooth signage: the picture or board with oil, very smooth signage.
2, luminous material signage: with luminous material sign (that is, we usually say neon).
3, acrylic signage (acrylic): acrylic material to do the main material of the board signage.
4, metal signs: in the absence of a specially designated board, the main material of the board or text with metal as a sign of the signage.
5, electro-optical plate: with light-emitting diodes or luminous tubes to achieve monochrome or colorful performance effect of the signage. To light-emitting diodes and performance, can be divided into luminous electro-optical board, LCD, LED, CRT, FDT and other five categories.
6, reflective signage: the use of reflective film made of signage, with reflective tips. 1, the time is different:
A, illuminated signs: in order to day and night use, in the internal installation of luminous tubes in the sign or in the internal installation of the projector or in the external installation of the sign lighting and so on the sign.
B. Non-illuminated Signs: Signs that are not illuminated for the sole purpose of day and night use.
2, the location of different:
A, indoor signs: signs located indoors, such as directional arrow signs, indoor reception signs and so on.
B, outdoor signage: located in all non-indoor space signage.
3, different purposes:
A, commercial signage: generally refers to the signage set up to achieve commercial purposes.
B, public **** sign: located in the public **** place, in order to give the public announcements or used to publicize certain information signage.
4, the use of different:
A, medals: a collective term for honorary signage. Such as "advanced collectives, authorization plates" and so on.
B, navigation signs: used to identify the direction, notes, reminders of the signage, such as "signposts" and so on.
C, mechanical nameplate: used to identify or explain the attributes of mechanical product signage.
5, the difference between energy saving and environmental protection
A, fluorescent signs, also known as light storage signs self-luminous signs, with the absorption of light sources, storage of light sources, the night release of 10-12 hours of light.
B, electrified signage, light body, can only use electricity or batteries to maintain the brightness, the light source is very poor brightness, not energy-saving, easy to damage. First, the metal flat tanned signs
Metal flat tanned signs is mainly the use of photographic tanned signs, the different colors dissolved into the film inside, so that it is presented through the method of development in the metal plate, so as to achieve the purpose of the significance of the purpose of a metal sign.
The following are several kinds of frequently contacted metal flat tanning sign specific process and formula (flat tanning sign process):
Flat tanning aluminum sign: is the use of photographic plate making method, the different pigments into the film inside, so that the text, patterns presented on the metal plate, so as to achieve the purpose of the metal plate with the meaning of the description.
1) material: the requirements of the raw material size is generally larger than the size of the plate (more than 5mm), the plate surface is flat and smooth, no pits and dents.
2) pre-treatment: ① polishing ② drawing ③ treatment ④ oxidation and other methods.
3) water closure: the board will be treated, after removing the oil, remove the film, quickly immersed in water and air contact.
4) glue: glue configuration. Glue: 200-230 grams of water: 1000 ml, boiling water for 2 hours so that the glue is fully dissolved, so that the temperature is reduced to 30-50 ℃ when adding photosensitizer (ammonium heavy caseinate) 25-30 grams of glue will be evenly coated in the metal plate, drying to be used.
5) sun plate: can use SB750 type vacuum sun plate type machine for photosensitive sun plate, light 60-90cm time 40-80 seconds after taking, put in warm water to develop 1 minute into the color solution for dyeing.
6) light preservation: after sufficient dyeing of the plate, after drying, with a brush or spray gun coated with light preservation paint (usually with eye baking paint or no-bake light preservation paint).
7) cut into.
Flat tanning signs are generally used for indoor supplies, small appliances and non-harsh climate affected by the equipment. Advantages are simple plate making process, fast, timely delivery, the cost of defective rate and low. The disadvantage is that the sun and rain, easy to fade. Can not do outdoor signs.
Two, corrosion of metal signs
Corrosion of metal signs are also called etching signs. The main mask, etching, post-processing three steps to process the production of convex metal signs or concave metal signs.
Corrosion of metal signs production process:
1) material: according to the drawing requirements (layout size) size, plus no less than 5mm around the outer edge. Shear plate with 720-type pedal-type shearing machine, the requirements of a flat surface, no burrs around.
2) metal corrosion sign surface treatment:
(1) mechanical polishing: 2.2-4 kilowatts of polishing machine, mechanical polishing of wool, cloth wheel using 300-350 motor speed generally 2000-3000 rpm.
(2) alkali treatment: 10-15% sodium hydroxide in a 65-85 ℃ water solution will be boiled in the metal plate 10-30 seconds, then wash with water, immersed in 5% aqueous solution of bicarbonate of acid.
(3) powder treatment method: with a flat brush dipped in the old powder (double powder) will be the plate uniformly criss-cross method of brushing the ear to until the removal of stained surfaces, or the removal of the effect of oxygen skin, and then closed in a 5% aqueous solution of potassium dichromate.
(4) drawing treatment method: with mechanical or manual drawing method, the metal plate surface for drawing treatment, in order to achieve the effect of metal surface regeneration.
Three, metal silk screen sign
Metal silk screen sign refers to the use of resin-based ink, screen printing in the pre-treatment of the board, and then keep light, laminating and other processes can be made into a variety of beautiful color silk screen metal sign.
Metal screen printing signage production technology, is an aspect of the application of screen printing technology. Various kinds of screen printing signs have been widely used in the electronic industry and household appliances products, especially in a variety of signs on the surface of the new decorative process, it is in the form of delicate and elegant, many times colorful decorative effect in front of people, improve the value of goods and competitiveness. In the production process of metal signage production, play a decisive role is the screen printing plate and substrate pre-treatment process technology and printing points and screen printing ink selection.
Four, electroplating metal signs and metal electroforming nameplate
Metal electroplating and electroforming nameplate is also known as the pile of gold signs, it is the use of screen printing or photographic plate making method, the plate on the lamination, and then the use of plating methods, so that the text and the line through the pre-plating, copper casting, nickel-plating, gold-plating forming a raised heap of gold plaques. It can be completed according to the user's requirements of different patterns and various fonts of text, the product is durable and non-corrosive, not afraid of the rain and sun, wear-resistant, non-fading. Beautiful and generous color bright, clear patterns, good brightness is a variety of electronic products, cars, household appliances and other essential body stickers
Five, thermal transfer metal sign
Thermal transfer metal sign is a metal plate using surface treatment process to generate a special panel, and then you design into a colorful picture with inkjet printing to the transfer of the paper by heating reversed to the metal plate, made of metal sign. metal plate, made of metal signage.
The production process of thermal transfer metal signage: the treatment of base paper - > printing protective layer - > printing pattern layer - > printing luminous layer - > printing cover layer - > printing adhesive layer - > drying - > packaging.
1) Protective layer. The use of 300 mesh screen printing once transparent thermal transfer ink (if the viscosity of the ink is too large, you can use thinner to dilute to the appropriate viscosity), the entire pattern of all printed transparent ink, mainly used to protect the pattern layer, so that the pattern is wear-resistant, wash-resistant, chemical-resistant, but also to play the role of locating the pattern. Adopt natural drying or low temperature drying can be.
2) Pattern layer. Pattern layer using thermal transfer color ink printing once can be used, the screen mesh used for 300 mesh, according to the actual situation with a thinner to adjust the viscosity. The order of printing is mainly based on the color from dark to light. Pay attention to the positioning accuracy, so as not to re-print the light-emitting patterns off-set. Natural drying or low temperature drying can be used.
3) Light-emitting layer. The light-emitting material and transparent thermal transfer ink according to 1:1 prepared into light-emitting ink, with thinner to adjust the viscosity.
The use of 100 to 200 mesh screen printing, printing the number of times according to the luminous brightness to determine the luminous brightness, high luminous brightness, the number of times of printing, luminous brightness is low, the number of times of printing, general printing two times to meet the requirements. Natural drying or low temperature drying can be used.
4) Covering layer. Due to the use of luminescent materials printing patterns, must be printed after the pattern of white reflective layer to increase the effect of personalization. We use white thermal transfer ink to print a cover layer on the entire pattern with a screen coated with a protective printing layer. Natural drying or low temperature drying can be used.
5) Adhesive layer. Finally, with 100 to 200 mesh screen printing over the hot melt adhesive layer, to ensure coverage of the entire pattern. Mainly used to bond the pattern with the fabric. Use natural drying or low temperature drying can be.
6) Packaging of the sign. The dried heat transfer sign is packed with packaging film and placed flat.
Current conventional practice more or less and will use ink or other chemical reagents, there is a certain amount of pollution to the environment. With the progress of science and technology, there will be better processing technology for the production of signs.