How to Choose Vertical Plastic Injection Moulding Machine Manufacturer?

Buying an injection molding machine is a significant decision, requiring careful consideration. It's critical to avoid overspending on a machine that's too large or selecting one that's too small for your needs. Identifying the right machine tailored to your product is essential, and the supplier plays a vital role in guiding buyers towards the correct solution. Understanding the necessary steps for selecting an injection molding machine is highly beneficial for buyers, leading to informed decisions.

Currently, the market offers a plethora of injection molding machines. Buyers often mistakenly focus solely on the machine's injection capacity rather than considering both the injection and clamping functions together. A comprehensive approach is necessary for making a suitable choice.

Among the many factors influencing the selection of an injection molding machine, the injection weight stands out as a critical parameter. This measurement, expressed in grams or ounces, indicates the maximum weight of plastic that can be injected by the machine when the screw reaches its maximum stroke without filling the mold. While this parameter seems straightforward, it can often lead to misunderstandings. Once the type of plastic is chosen, the weight of the corresponding plastic component can be deduced, leading buyers to rely heavily on injection weight for selection. It's important to note that the injection weight reflects the machine's processing capability and can be evaluated either via calculation or measurement, though disparities between the two may exist. Typically, tests are performed using standard PS plastic, which has a density of 1.05.

Steps to Determine Injection Weight

1. Begin by calculating the product weight using the formula: W = product weight + gate system weight. Here, W reflects the weight required for injection.
2. If the injection molded product is polystyrene (PS), use the formula Wps; Wps = (1.3 ~ 1.1) × W (the sum of product and gate system weight). For higher-quality products, consider using a larger coefficient; conversely, for lower quality, opt for a smaller one.
3. For products made from alternative plastics (denoted as X plastic), first compute the theoretical injection volume as Wx; Wx = (1.3 ~ 1.1) × (product weight + total gate system weight). Then, adjust based on the density of the X plastic to arrive at the PS material weight using the formula: Wps = Wx × 1.05 / Vx.
4. Finally, based on Wps calculations and LOG manuals, select the appropriate injection molding machine.

It's crucial to understand that injection weight isn't simply the injection volume multiplied by the density of PS. Various factors come into play, such as the need for the non-return ring's movement for achieving a closed position, which can result in discrepancies between theoretical and actual injection volumes. Moreover, for products with varying quality standards, guidelines recommend that the total weight should account for 35% to 85% of the injection weight, to avoid potential challenges like warping or decomposition of molten materials in the barrel.

Furthermore, several factors come into play while calculating clamping force, including:

1. The projected area (S), which is the largest visible area during mold opening and closing.
2. Cavity pressure (P) is influenced by multiple variables, including the number and placement of gates, gate size, product thickness, material viscosity, and injection speed.

There are diverse types of injection molding machines, each offering distinct advantages that can positively impact your business. Hydraulic machines are primarily dominant, although electric presses have gained popularity due to their efficiency and reduced operational costs. Hybrid machines aim to combine the benefits of both, though they often exhibit electric usage similar to that of fully electric models.

DENICE sincerely hopes to be your supplier and partner with competitive pricing and timely deliveries. When searching for a Vertical Plastic Injection Moulding Machine Manufacturer, look for key qualities in your choice of supplier, such as reviews and overall credibility. This guide should equip you with insights necessary to make informed choices that best fit your product needs. For more Vertical Injection Moulding Machine for Sale information, please contact us for professional assistance.