Full automatic PVC Bag High Frequency Welding Machine is used extensively to pvc bag, pvc self sealing bag, medical transfusion bag, medical blood transfusion bag, medial catheterization bag ,douche bag , hydrops bag etc for all medial disposable bags . Pvc Bag High Frequency Welding Machine Book Covering Machine,Pvc Bag High Frequency Welding Machine,Pvc Bag Making Machine,Rf Pvc Bag Sealing Machine Hangzhou Xiaoshan Wanfeng Mechanical & Electrical Equipment Factory , https://www.wanfengmachinery.com
First, the hot stamping version of the quality of the hot stamping is the primary factor to ensure the quality of stamping
At present, the production of bronzing edition mainly adopts photographic etching technology and electronic engraving technology, and the materials are commonly used for copper plate or zinc plate equipment consumables. Copper plate material is delicate, surface finish, heat transfer effect is better than the zinc plate, the use of high quality copper plate can improve the bronzing graphic glossiness and outline definition middle printing. The traditional photographic corrosion technology makes the bronzing plate process simple and low cost, mainly used for text, thick lines, general images; for the finer, uneven thickness of the graphic and other bronzing version need to use the second rotten deep or use electric carving technology printing market. The electric carving production bronzing edition can express rich and delicate level changes and greatly expand the performance of the packaging. This process is conducive to environmental protection, but the investment in electric carving equipment is relatively large. The current engraving depth is not ideal enough, and it is easy to cause the middle of the “hot stamping†stamping. print. Holographic anti-counterfeit stamping production technology requirements are relatively high. Previously, they were mainly produced in Taiwan or abroad, and the plate making cycle was longer. It was only used for packaging equipment consumables for fixed and large-volume products. Currently, there are several units in Shanxi Yuncheng, Beijing and Shanghai that can produce printing markets.
Second, bronzing equipment "workers want to do good, must first sharpen its device"
The selection of bronzing equipment is the key factor in determining the quality of bronzing. Sheetfoil hot stamping machine has flat pressing, round flat pressing and round pressing. There are three types of flat pressing machines at present. The main applications are: Shanghai Yahua Printing Machinery Co., Ltd. TYM series die cutting hot stamping two Machine, Tangshan Yuyin Group's TYMl020 automatic hot stamping die-cutting machine, Tianjin Hengheng Machinery Industry's MK series of automatic hot stamping die-cutting machine, the highest bronzing speed of 5000 hours of printing market. The German Stoll FOLLJET FBRl04 type hot stamping machine is represented by a round press circle. Using the design concept of an offset press, the maximum hot stamping speed can reach 10,000 hours. Currently, it is the fastest equipment and equipment consumable for international sheet-fed stamping. Round press, round press and flat press Three types of embossing hot stamping machines have their own advantages and disadvantages: Round press round and round press Hot press implementation is line pressure, total pressure is small, easy to complete with relatively small pressure A large area of ​​bronzing in the field, smooth movement, and high round-ring production efficiency, especially suitable for large quantities of live stamping, but due to the difficulty of copper circular surface processing, higher production costs, heating roller than flat heating equipment Consumables. The flattening operation is flexible and convenient, and it is more suitable for the short version of the product material market. Compared with imported bronzing equipment, domestic bronzing equipment has obvious advantages in terms of performance and price. The price of domestic machines is only equivalent to the price of similar foreign products in the l5~14 range, but the accuracy, stability and function of imported machines are obviously better than that of domestic ones. Machines are also more durable than domestic ones and are more suitable for processing and printing of fixed bulk high-end packaging products. Therefore, the product type and lot size are the key printing markets that determine the selection of bronzing equipment. Whether it has BOBST and other high-end stamping die-cutting equipment has become the preferred printing tool for customers in the industry.
Third, bronzing suitability
The so-called bronzing suitability refers to the model selection of galvanized aluminum and the matching material prices between bronzing speed, temperature and pressure. In the case of fixed hardware such as equipment, proper control of bronzing suitability is the most important means of improving gilding quality. The following is an analysis of some of the quality issues reflected in the actual operation, in order to scientifically grasp the bronzing adaptive printing alliance.
1. No hot stamping or hot stamping This is related to the surface properties of printed parts, the nature of anodized aluminum, hot stamping temperature and pressure and other factors related to the printing market.
Too much dust on the surface of the print or the surface contains additives such as release agent, bright light, which will hinder the printing of the adsorption of aluminum and paper on the middle. The solution: surface powder removal or printing alliances in the printing process. Improper use of anodized aluminum directly affects the fastness of hot stamping in the middle. According to the size of the bronzing area, the characteristics of the stamped material should be considered in consideration of what type of anodized aluminum equipment is used. Domestic aluminum products are mainly peacock brand series produced by Shanghai Shenyong Hot Stamping Material Co., Ltd. The imported galvanized aluminum is mainly the PM and LK series from Germany Kurtz, the Japanese A, K and H series, and the South Korea KOLON SP series printing tools. According to our practice and testing, the matching of the galvanized aluminum can mainly refer to the following classifications: The bronzing type of electro-aluminum on common products is type 88-l, KURZ PM; the printed materials such as cigarette packs, cosmetics, etc. (including gold and silver) ) The gold-clad anodized aluminum is available in type 88-2; the finely-printed electro-aluminums used in cigarette markings, cosmetic packaging, etc. are 88-3, 88-4, PM288, etc.; suitable for OPP or PET laminating paper and UV inks The paperboard, glossy paper and other products stamped with electro-aluminum have 88-4 type, K series, LK series, and SP series printing technology. The correct matching between hot stamping equipment and hot pressing time and hot stamping temperature is not mastered, which affects the fastness of the hot stamping and the sharpness of the outline of the graphic and printing. Due to the difference in equipment, hot stamping materials, hot stamping time and hot stamping temperature have different printing alliances. For example, a high-speed circular press has a fast speed and the press line contacts. The hot stamping temperature is higher than that of a round flat or flat press equipment consumable. Under normal circumstances, the round stamping hot stamping temperature is between 190°C and 220°C, the rounding pressure is about 130°C~150°C, and the flattening is about 100°C~120°C. Of course, hot pressing time, hot stamping temperature and production efficiency are also largely controlled by the transfer properties of the electro-aluminum printing tool.
2. Anti-pulling and pulling means that after the hot stamping, the electro-chemical aluminum will pull away printing inks or printings, etc., to remove central China. The main reason is that the ink on the surface of the printed product is not dry or the post-processing of UV on the surface of the printed product is improperly handled, resulting in equipment consumables caused by the combination of surface ink, UV oil, and the surface of the paper. Solution: After the prints are dried, hot stamping printing techniques are used. In addition, electrified aluminum can be used to print in the middle of the electrochemical aluminum with low separation force and excellent heat transfer.
3. Paste-printing and hot stamping The electro-aluminum discoloration paste version is mainly due to the poorly-printed version of the bronzing plate, the loose installation of the galvanized aluminum, or the improper printing of the galvanized aluminum foil. The color change of electro-aluminum after hot stamping is mainly caused by high stamping temperature and equipment consumables. In addition, the wrinkling of the aluminum foil can also cause uneven coloration and discoloration of the hot stamping, and the intermediate printing can be solved by appropriately lowering the temperature. For round presses, fans can be installed at the foil feeding station to keep the foils from floating. Avoid the galvanized version and the scorching printing technology before hot stamping.
4. The improper arrangement of the process destroys the luster of the surface of the electro-aluminum, and the outline of the graphic is sent to the virtual material market. In the bronzing process that requires lamination, people often worry that the gold foil will be easily wiped off and then hot stamped and then laminated. This can easily lead to:
1 The film (especially the matt film) will destroy the luster of the surface of the electrodeposited aluminum and should not be coated with water-soluble glue. Otherwise, the surface of the electrodeposited aluminum will be blackened, and at the same time, it will easily cause the gold powder to stick to the edge of the picture and cause the phenomenon of false appearance.
2 After bronzing, sag due to pressure, coupled with the glue is not easy to penetrate the surface of the aluminum, it is easy to cause the bronzing OPP and paper separation and affect the quality of goods and materials market. The correct process is to apply foil and then hot stamping, and choose the aluminum foil matching the OPP in central China.
In short, there are many factors that affect the quality of bronzing. Making high-quality bronzing plates and correctly grasping bronzing suitability are the key printing technologies to improve the quality of bronzing.
How to improve the quality of bronzing
With the improvement of the national economy and the development of the printing and packaging industry, people demand product packaging: high-end, exquisite, environmentally friendly, and full of personalized materials and capital market. In the post-press processing of packaging products, the electro-aluminum hot stamping process is favored by people because of its unique surface finishing effect. There are application printing technologies in high-end packaging such as banknotes, cigarette labels, pharmaceuticals and cosmetics. Electro-aluminum hot stamping refers to hot stamping, hot silver and other hot stamping materials hot stamping process. In order to facilitate discussion, the following use of hot stamping aluminum electroplating stamping printing tools. There are two main functions of bronzing. One is surface decoration, which increases the value-added printing technology of the product. Hobbies and celebrations are the national traditions of our country. The combination of bronzing and embossing techniques is used to highlight its luxury. The second is to give the product a higher security performance. The holographic orientation is used to stamp the trademark logo to prevent counterfeiting and protect brand names in central China. At the same time, bronzing is very capable of expressing the personalized and safe environmental protection printing market. Therefore, many high-end packaging uses the bronzing process, so how to improve the quality of bronzing? This article discusses the printing market from the following aspects.