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What is vacuum forming machine application?
Application Industry and material ：
◎ Plastic moulding&mask making
◎ University or research institutions teaching experiments
◎ Chocolate and cake package box making
◎ Industrial & automobile decoration
◎ Other thermoplastic material forming industrial
◎ Application material: PMMA(Acrylic ), PVC,ABS,PE,PET ,Poly styrene ,poly propylene ect.
What is VMP-A and B series vacuum membrane press application?
Application Industry ：
◎ 2D and 3D forming of plastic thermoplastic materials and composite solid surface material
◎ Production of laminated bending,shaped bonding and flat gluing working pieces made of wood-like material
◎ Overlaying of work pieces with high-quality veneers and other material
Examples of Material ：
◎ Solid surface materials : DuPont Corian, Samsung Staron, LG HI-MACS etc.
◎ Thermoplastics: ABS, PVC, PC (Makrolon), PMMA (Plexiglas, Acrylic), PET-G, PS, PP, etc.
What is vacuum forming machine?
1. Overview of blister technology
Vacuum forming technology is a processing and forming technology based on thermoplastic plastic sheets. The forming process has been popularized in China in the 1980s. In the past decade, Union Forming Tech has continuously improved the forming equipment, improved the technical problems of temperature control and transmission methods of vacuum forming machines, and solved the process technology of high-stretch and high-precision vacuum forming products, especially PMMA ABS PET products, whose high transparency, high uniformity and high precision have been improved.
2. Principle of vacuum forming
Vacuum forming technology is a thermoforming processing method. It is a method of manufacturing open plastic shell products using thermoplastic plastic sheets. After cutting the plastic sheet into a certain size and heating and softening it, it is deformed and applied to a specific mold contour surface with the help of the air pressure difference and mechanical pressure on both sides of the sheet. After cooling and shaping, and trimming, the forming product process is completed.
What are the common issues encountered during the production of vacuum-formed products?
In the production process of vacuum forming products, there are mainly problems such as "crystal points, bubbles, uneven thickness, scratches, pulling lines, inadequate suction, and bursting".
◎ Crystal points and bubble problems: Crystal points and bubble problems are the most common problems in blister factories. This is mainly based on customer requirements. The reasons for the above problems are: 1) The quality of raw materials, whether they are brand new materials; 2) Whether the mold is made of copper, aluminum, or plaster, which is related to the mold making itself; 3) Whether there is dust in the production environment, whether it is a dust-free workshop, whether the surrounding area of the machine is clean, etc.
◎ Uneven thickness: It mainly depends on the temperature control system of the vacuum forming equipment, which is the main reason for the uneven thickness. Secondly, whether the quality and thickness of the raw materials are uniform, which is closely related to the products produced. In addition, whether the upper mold is made standard, etc.
◎ Scratches: From the raw materials themselves to the machine operation, machine, punching, folding, packaging, etc., this phenomenon may occur. This is mainly for customer requirements. If the customer is very concerned about this problem, we must pay special attention to preventive measures during the production process.
◎ Wire drawing problem: One is that the material is baked too well, and the other is that the upper mold is not pressed well. For these two situations, they are in the production process, and attention should be paid to adjustment to avoid.
◎ The problem of not being able to suck in place: It is mainly caused by insufficient product temperature, and the product is relatively deep, and the upper mold is not pressed or the upper mold is not pressed in place. For this phenomenon, it is mainly completed by adjusting the machine.
◎ Burst problem: It is mainly determined by the nature of the material itself. Some materials are very brittle and are prone to bursting during the production process. In addition, when producing APET materials, the silicone oil of the material is not enough, and there will be bursting. It is also related to the weather. In winter, the materials are relatively brittle, so special attention should be paid to the raw material formula. The last point is that there is a problem with the knife mold during the punching machine or the knife is not adjusted properly.
How does forming, pressing and laminating with vacuum work?
Vacuum is used in a wide range of forming, pressing and laminating applications in a variety of different branches. From flat panel display laminating to vacuum-assisted Resin Transfer Molding (RTM). And even in the production of rotor blades for wind energy plants, vacuum is indispensable.
Forming
When it comes to forming, it is important that a clearly defined vacuum is applied to draw the material gently into the mold. An established process used for many products is thermoforming. A proven method to shape plastic foils and sheets.
Pressing
Pressing with vacuum is used in the woodworking industry. For example, when several layers of wood are glued together. Especially if mechanical pressing cannot be used because of the geometric shape. Furthermore, vacuum allows to attach veneers or to fix synthetics to wooden profiles. For example, onto kitchen fronts.
Laminating
Lamination under vacuum is a common process for joining different layers of materials together. Mostly for semiconductors and in the electronics industries. It allows, for instance, to create solar modules, flat screens and smartphone displays.
