What are the standard sizes of injection molding machine molds?

1. Template size
Small template: usually the size is 300mm×300mm and below.The injection molding machine corresponding to this type of template has smaller specifications and is mainly used to produce fine and compact plastic products, such as miniature electronic accessories and small toy components.Its advantage is that it takes up little space and can arrange multiple equipment in a limited workshop site to achieve efficient small-scale mass production.For example, some molds for the production of precision sensor housings have a template size of about 200mm×200mm, which are suitable for small injection molding machines to meet the needs of electronic products for high-precision and small batches of parts.
Medium-sized template: the range is roughly between 300mm×300mm and 600mm×600mm.This is an extremely widely used type of template size, which can be used to manufacture many plastic products in daily life, such as all kinds of plastic tableware, small household appliance housings, stationery, etc.While meeting a certain production scale, medium-sized templates take into account the processing cost of molds and the versatility of equipment.Taking the common plastic water cup mold as an example, the template size may be about 450mm×450mm, which is suitable for medium-sized injection molding machines, which can achieve stable and efficient mass production.
Large template: the size exceeds 600mm×600mm.Such templates are specially designed for the molding of large-scale plastic products. They are commonly used in automotive, aerospace, large home appliances and other fields, such as molds for car bumpers, aircraft interior parts, large refrigerator housings, etc.Large templates require higher strength and rigidity to withstand huge injection pressure, and in the mold manufacturing process, the processing difficulty and cost are also significantly increased.For example, a large automobile side circumference mold with a template size of up to 1200mm×1000mm needs to be equipped with a large professional injection molding machine to ensure the high-quality molding of large and complex plastic products.
Second, the size of the mold cavity
Tiny mold cavity: The size of the mold cavity is very small, and the side length or diameter is often below 50mm.It is mainly used in the production of ultra-precision and tiny parts, such as micro gears, precision medical implants, and high-end electronic chip packages.Due to the small mold cavity and extremely high requirements for mold manufacturing accuracy, advanced micro-nano processing technology is usually required, and the control of injection molding process parameters is also more refined.For example, the mold cavity used to produce miniature watch parts may have a side length of only about 20mm. High-precision molds and precision injection molding processes are used to ensure the fine quality of the product.
Small mold cavity: Generally refers to the mold cavity with a side length or diameter between 50mm and 200mm.This kind of mold cavity is suitable for the production of small consumer electronic product housings, small decorations, simple tool housings, etc.Compared with the tiny mold cavity, its processing difficulty is slightly lower, but it still needs to pay attention to the detailed design of the mold and the optimization of injection molding parameters to ensure product quality.For example, in common mobile phone case molds, the mold cavity size is mostly about 150mm×80mm. Through the reasonable design of the mold cavity, the diverse appearance and functional requirements of the mobile phone case can be realized.
Large mold cavity: A mold cavity with a side length or diameter greater than 200mm, which is used in the manufacture of large industrial products and daily necessities, such as trash cans, large industrial plastic buckets, bathtubs, etc.Large mold cavities are facing challenges such as uneven filling of plastic melts and difficult cooling. Therefore, when designing molds, the cooling system and gate layout are particularly critical.Taking a large trash can mold as an example, the diameter of the mold cavity can reach more than 500mm, and the gate and cooling water channel need to be carefully designed to ensure that the plastic is evenly filled and cooled quickly, so as to improve production efficiency and product quality.
Third, the thickness and size
Thin sheet mold: the thickness is usually between 15mm and 30mm.It is mainly used in the production of plastic sheet products, such as plastic film, flexible electronic device packaging sheet, food packaging cling film, etc.Thin sheet molds have high requirements for the balance of strength and toughness of mold materials, not only to ensure that the mold is not deformed under injection pressure, but also to facilitate the processing of thin and uniform cavities.For example, plastic film molds for food packaging have a thickness of about 20mm and are made of special high-strength steel to meet the needs of continuous and high-speed production.
Conventional thickness molds: The thickness range is between 30mm and 100mm. It is the most common type of mold thickness. It is suitable for the production of most ordinary plastic products, covering a wide range of fields from daily necessities to industrial parts.This thickness can not only ensure that the mold has sufficient mechanical strength to withstand the pressure and friction in the injection molding process, but also reasonably control the cost of the mold.Such as common plastic chair molds, the thickness is generally about 60mm, which is suitable for conventional injection molding processes to achieve stable mass production.
Thick plate mold: with a thickness of more than 100mm, it is specially designed for large and thick-walled plastic products. It is commonly used in large mechanical housings, heavy-duty pipeline fittings, large outdoor water storage containers, etc.Thick-plate molds require strong structural support capabilities, and the material selection tends to be high-strength and high-toughness alloy steel, and the design of the cooling system inside the mold is more complex.For example, large-scale industrial pipeline molds can have a thickness of more than 200mm. By optimizing the cooling water circuit and strengthening the mold structure, the molding quality and production efficiency of thick-walled products are ensured.
The standard size of injection molding machine molds is not static, but with the diversified needs of plastic products, the development of injection molding technology and the application of new materials continue to evolve.Mold manufacturers and injection molding companies need to work closely together to accurately select and optimize mold sizes based on actual production needs to promote the efficient development of the injection molding industry.