What is the concept of acrylic blister?

Acrylic light boxes and craft products are favored by commercial customers because of their bright colors, easy molding, good toughness and high light transmittance. Especially with the geometric growth of the domestic acrylic product market, many qualified traditional advertising product companies have introduced acrylic plastic suction equipment, or realized a one-time transformation to acrylic product companies. However, according to the first-hand information of market sales, the author summarizes two fundamental phenomena in the market sales of acrylic equipment: first, many companies that want to buy acrylic equipment simply don't know what acrylic materials are, let alone what acrylic plastic absorption equipment is; Secondly, many new companies can't decompress acrylic equipment at all, especially don't know how to choose the equipment suitable for their own use, so they often buy with their own self-righteous feelings. As a result, I often regret it as soon as I get home. I was wrong. It's not what I need at all, or it can't meet my own needs at all. To this end, the author forms this article according to the above problems, all in order to let customers who are interested in the development of acrylic industry choose to buy back products suitable for their own needs, and try to avoid the phenomenon that consumers regret buying home. Here, the author declares that all the words or materials mentioned in this article related to acrylic equipment manufacturers have no intention of slandering or slandering. Please forgive me if there is anything wrong. This article only represents the author's personal views and has nothing to do with Nanjing Biya enterprises. 1. Acrylic plastic absorption equipment basically constitutes the common acrylic plastic absorption molding machine in Chinese mainland market at present, which can be divided into two categories according to the industry: the first category is the bathtub plastic absorption molding machine commonly used in the bathroom industry; The second is the plastic suction machine commonly used in the advertising product industry. Although the molding principle is exactly the same, the size, function and cost are quite different. Therefore, this paper only focuses on the plastic suction machine commonly used in advertising products industry. Although Nanjing Biya Company will introduce German technology to produce a new generation of products that can be used in advertising products industry and bathroom production at the end of 2004, this is still another story. 1, the system of acrylic plastic suction machine constitutes the acrylic plastic suction machine commonly used in advertising products industry. The system is divided into three functional systems: acrylic heating softening system, acrylic pressure forming system and acrylic plastic suction system. Nanjing Biya, a famous domestic manufacturer of acrylic plastic suction machine, added an acrylic blow molding system to form four functional systems. To paraphrase General Manager Chen, a famous manufacturer of acrylic products in Guangzhou, "Acrylic products can only be made into various shapes by suction, pressing and blowing, otherwise the performance of acrylic plates will not be fully displayed." 2. Structure of Acrylic Suction Molding Machine At present, there are three types of acrylic suction machines in China: the first is a split type represented by Nanjing Biya, that is, a two-body type in which the pressure softening system is separated from the suction, pressing and blowing systems; Second, the functions of heating, suction and pressurization are integrated; Thirdly, the heating and plastic absorption systems represented by the classic Northeast XX, Shandong XX and Hebei XX are connected respectively. Of course, at present, all major domestic manufacturers sell split and integrated products, mainly because of the different needs of customers. Of course, each model has its own advantages and disadvantages, and the conjoined model introduced by XXX in Northeast China and XXX in Shandong Province can be regarded as a transitional product between separation and integration, with advantages and disadvantages in between. 3. The working form of acrylic suction press The working form of acrylic suction molding machine can be divided into two types: the first type is top-down downward molding represented by Nanjing Biya BY-X2, BY-X4, Shandong XX, Northeast XX series and Hebei XX; The second is the top-down model represented by the Northeast XX series. Of course, everyone says that their design is the most scientific, but there is no essential difference in terms of use function and production effect, only operating habits and ease of operation. 4. Lifting mode of acrylic plastic suction machine platform: As far as the lifting mode of plastic suction machine platform in the domestic market is concerned, all major manufacturers basically adopt cyan hydraulic lifting system, and only Qingdao XX adopts electric control lifting system. As for the difference between them, readers can distinguish them according to their own experience and basic knowledge. If it is specified, it is probably that the hydraulic pressure is elastic, and the electric control may not be elastic, because the author himself has never used this kind of electric control equipment and dare not talk nonsense. In addition, in the market, many merchants talked about whether the air pressure method can be used, and they can definitely answer that the air pressure is too elastic to be applied to the compression molding system of acrylic, which is determined by the physical properties of the acrylic plate, that is, the air pressure is difficult to reach the stable pressure required by acrylic, so there is no need to make such an assumption. Second, the functions of various systems of acrylic plastic machines Customers outside the application industry or customers who have just entered the acrylic industry often have a doubt: Why are they all called acrylic plastic machines, and the price difference ranges from 10,000 yuan to more than 100,000 yuan? Is it the profiteering of the manufacturer or the performance difference of the equipment? The answer is the latter: the performance of the equipment! Specifically, there are only suction-but-not-pressure plastic machines in the market, and there are also suction-and-pressure molding machines that integrate suction and pressure. Nanjing Biya Company introduced the fourth acrylic suction, pressure and blow molding machine which integrates suction, pressure and blow. Due to the different structures and functions of various types of equipment, the manufacturing cost of equipment is of course different. For example, the XXX series introduced by XXX company in Beijing, of course, also uses the principle of thermoforming, but this series of equipment only has a vacuum system, so it only has the function of pumping air. In acrylic product manufacturers, products with different shapes and colors can be made by using this kind of equipment, but the convex and concave edges and corners of the products are not obvious, so it is precisely because of the simple structure, low cost and incomplete functions that this kind of equipment is on the market. Another equipment commonly used in Guangdong market is a press that only presses but does not suck. Because of its function of pressing, simple structure and low cost, it was widely used all over the country in the early stage of the development of acrylic products industry. In fact, it is only limited to the simple press commonly used in woodworking industry. However, because its function is obviously different from that of plastic suction machine, this kind of equipment can only make angular products. Where the edges and corners are not obvious, only the products completed by the plastic suction machine can only be sighing! It is precisely because of the limitations of the above two kinds of equipment that acrylic equipment manufacturers have introduced a modern acrylic suction and pressure molding machine that integrates suction and pressure! Of course, on the one hand, this depends on the maturity of the domestic acrylic product market, on the other hand, it also depends on the increasingly strict technology, standards and requirements of acrylic products, which leads to the maturity of the acrylic plastic suction market today. A mature market will inevitably bring market competition, which in turn will promote technological progress, but at the same time it will also produce dazzling market phenomena. Third, the main technical parameters of acrylic plastic absorption A complete acrylic plastic absorption molding machine must include several main technical parameters, such as heating power, heating temperature, plastic absorption depth, lifting table height, plastic absorption table specifications, plastic absorption negative pressure, etc. In fact, it is the quantitative index of three system technologies: heating softening system, pressure forming system and plastic suction forming system. 1. heating and softening system: the main heating and softening method of acrylic in China is electric heating, and a few businesses use gas heating in their applications, but gas heating is rarely used because of its safety and convenience. Because electric heating involves voltage standard, power, heating temperature and so on. At present, the equipment provided by various acrylic equipment manufacturers can be divided into 220V and 380V, mainly depending on the power supply of customers. However, because the thermal efficiency of 380V voltage is higher than that of 220V and the heating speed is faster, it is generally recommended to use 380V industrial power supply. (1) Concept difference between heating power and electricity consumption Take BY-X2 large equipment imported from Nanjing Biya as an example, the maximum heating power is 27KW. In fact, Nanjing Biya adopts the method of heating in different compartments, that is, when only a small board is needed, it can only open half of the compartments, which can save half of the energy, that is, 27KW/2= 13.5KW, and at the same time adopts the constant temperature principle of the refrigerator. (2) The concept of adjustable temperature: Because the hot opening temperature of acrylic board is between 140℃ and 180℃, the hot forming temperature is generally around 100℃, and the general temperature can be set at around 200℃, while the thermal deformation temperatures of PC, ABS, PVC and other materials are quite different from those of acrylic, so At the same time, a key problem is that the heating softening speed of acrylic sheet is greatly influenced by the temperature in the softening box. For example, a 3mm acrylic sheet can meet the softening requirements of plastic absorption in about 7 minutes at 200℃, and it can reach the standard in about 4 minutes at 300℃, which determines the working speed of acrylic products. However, according to the physical properties of acrylic sheets, it is generally better to heat at around 200℃, and the temperature is too low. If the temperature is too high, the performance of the plate will be seriously damaged. There is a joke here. Many acrylic equipment manufacturers indicate 0℃-400℃ (adjustable) when marking parameters. I don't understand how to operate the device if it is set to zero. As far as I know, domestic acrylic equipment manufacturers don't add refrigeration system, so if the room temperature of 35℃ in Guangzhou is lowered to 0℃, I believe this equipment is better than the refrigerator, because the biggest disadvantage of the refrigerator is that it can't be used as a microwave oven! (3) Heating method At present, the acrylic brand of Nanjing Biya has always been the heating method of down drying, that is, the far infrared heating tube is facing down, the iron plate is covered with asbestos cloth, and the acrylic board is heated on asbestos cloth. Nanjing Biya Company has two reasons. First, the upward heat transfer rate is high, just like baking sweet potatoes. Which is faster, putting it on top or putting it under a big one? Self-evident; Secondly, asbestos cloth can make the heat conduction more uniform, and at the same time, it can prevent the iron plate from rubbing against the acrylic plate. Of course, there are also acrylic plates placed under the heating pipes, but they are the same, and it is correct to heat the acrylic plates to a predetermined temperature. 2. Pressure forming system The pressure forming system is the key to acrylic sheet forming, because it determines the basic value of each acrylic plastic suction machine. In this system, it determines the pressure, size, suction depth and so on. It is the most critical technical index when buying acrylic plastic suction machine. Why? Because the stroke of the hydraulic cylinder of the pressure molding system determines the lifting height of the lifting table, the lifting height determines the suction depth, and the suction depth determines the purpose of purchasing the acrylic suction molding machine! Use is the purpose and significance of purchase. At present, the stroke of by-x2 machine, the mainstream product produced by Nanjing Biya Company, is 65cm, which is the longest stroke of hydraulic cylinder among major domestic equipment manufacturers. Its basic calculation method is: stroke = telescopic length of hydraulic cylinder; Lifting height = effective distance between working platform and lifting platform. In fact, the hydraulic system for acrylic plastic absorption has specifications such as 45cm, 50cm, 65cm, 80cm, 100cm, 120cm. However, in the marketing process of acrylic equipment manufacturers, most of them are 45cm travel equipment, especially the heating, suction and molding machines, and more than 90% of them are of this type. However, with the maturity of the acrylic product market and the diversification of acrylic products, the limitations of low-stroke equipment are becoming more and more obvious, especially in the production of handicrafts and display products, which can not meet the basic requirements of merchants. For example, in the recent production process of Nanjing Biya Company, more and more customers customized equipment with strokes of 80cm, 100cm and 120cm, which will not be repeated here. However, there is a second joke that I have to tell. Anyone who knows something about China's industrial development probably knows that hydraulic technology is one of the most mature industrial technologies in China, so it is not necessary for China to import general hydraulic machinery. Is it funny if some acrylic equipment manufacturers always reiterate that the hydraulic system used is imported? At least I know that my same user didn't even find an imported screw for a hydraulic system in Guangzhou hydraulic parts market. 3. Vacuum suction system Vacuum suction system, also known as suction system, is a functional system for vacuum suction by using negative pressure generated by vacuum. This determines the special function of acrylic plastic suction machine. The vacuum pressure absorption system is actually composed of two main parts: vacuum pump and vacuum tank. The negative pressure generated by vacuum pump per unit time is certain and can only be solved by adding vacuum tank. Here comes the problem of the function and sales price of acrylic plastic suction machine. Take BY-X2 in Biya, Nanjing as an example. In addition to the high-power vacuum pump, a vacuum tank with a diameter of nearly 1m and a length of more than 2m is attached, which is unique in the domestic acrylic plastic absorption equipment. The vacuum negative pressure is usually expressed in Mpa, and the vacuum negative pressure in the acrylic plastic machine is generally from zero to minus 0~-0. 1Mpa (0 ~). If the vacuum is started from the maximum negative pressure of 0. 1Mpa in the pressure absorption process of the same acrylic sheet, if the vacuum tank with a diameter of 1m and a length of 2m continues/kloc-. However, if it is a vacuum tank with a diameter of 1m, of course, the molding effect of acrylic products is different in these two cases, especially when the processed acrylic board has a large area, the effect contrast is more obvious. However, it is undeniable that the vacuum systems made by different manufacturers in China are different. Some vacuum cans are as small as a big basketball, while others are not at all. Only connecting the suction pipe of the vacuum pump to the suction platform can not achieve the purpose of vacuum suction at all. No matter whether there are experienced buyers or not, there is no need to ask. Just look at the size of the vacuum tank to know the function and suction effect of the vacuum system. In particular, there are acrylic products in South China, which are greatly influenced by foreign markets, and some of them are purely foreign orders, so customers in South China have strict requirements for the vacuum system of acrylic equipment. For example, Yakeli suction blow molding machine of Nanjing Biya Company achieved today's design and manufacturing results only after repeated requests from Guangdong users.