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https://www.jewardmould.com/large-part-injection-molding/

LARGE PART INJECTION MOLDING
Long with the grow of the market and the popularization of large injection machine, the demand of large part molding also grows up every year. The large part molding has the advantages as high productivity, good consistency of product, low cost in mass production.

However, it needs long development cycle and requires heavy investment in injection molding machine and mould. Specially, the large size mould is not the simply enlarge of middle and small mould. It has many differences in the mould design, manufacture and assembly. We need to pay special attention to the following points:

The rigidity of mould

During the large part mould design, except for the strength, we also need to carefully calculate the mould’s rigidity. Considering the high injection pressure, large cavity size and high deformation, it’s necessary to strengthen the locating mechanism，cavity side plate and core bottom plate.

Injection system

Since the L／￡ of plastic melt in large part mould is relatively high, and most of them use multiple gating hot runner, the design of mould injection system and injection molds for sale is critical. It could directly influence the melt pressure, melt temperature, filling process, holding process and many other elements. Also, it affects the product’s quality and the mould’s strength, rigidity and life span. Therefore, the injection system is the key object of the mould optimization. During the design process, we carefully analyze the system through mold flow analysis and other technologies.

Processing technology

For the large part mould design, we need to take the convenience of processing and maintenance into consideration. Since the large part mould has more troubles of processing, movement and installation, we could separate a certain of structure into several small parts or inserts. It helps to reduce the dependency of large processing equipment and lower the cost. Also, we could process multiple parts at the same time to improve the productivity.

CASE STUDY
CHICKEN CRATE MOULD
Specialty: One mould, produce two products in different height by change the cavity sliders and insert block.

Version I：Product Dimension:1160x760x250mm; Product Weight:8700 g
Version II: Product Dimension:1160x760x215mm; Product Weight:8160 g
Mould size: 1900x1500x820 mm
Mould weight: 18 Ton
Casting system: 8 point hot runner system.
Injection machine：2400T

240L WASTE BIN MOULD
Specialty: Inset Be-Cu on the bottom and edge of product, to enforce the cooling effect and shorten the cycle time. The design of product is under EN840 standard.

Product Dimension： 585X720X1020 mm
Product Weight： 8350 g
Mould Size: 1200x1050x1440 mm
Mould Weight: 13.5 Ton
Casting System: 1 point hot runner
Injection Machine：2400T

BIN MOULD
Specialty: By change the various insert blocks, one mould could produce 4 types of products, which are venting and solid style in two different heights.
Version I：1200x1000x755 mm 32 kg (Venting)
Version II: 1200x1000x755mm 34kg (Solid)
Version III: 1200x1000x 555mm 25kg (Venting)
Version IV: 1200x1000x555mm 26kg (Solid)
Mould Size: 2450x2250x1650 mm
Mould Weight: 63 Ton
Casting System: 8 point hot runner system
Injection Machine：4000T

PALLET MOULD
Specialty: Inserting steel tubes on both of the X/Y axis direction to increase the loading weight.
Product Dimension：1200x1000x160 mm
Product Weight：14400 g
Mould Size: 17500x1520x1050 mm
Mould Weight: 17 Ton
Casting System: 18 points hot runner
Injection Machine：2400T

Jeward, as an excellent plastic mould maker, offers a wide range of injection mold for you to choose from.