plastic injection pallet mould

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plastic injection pallet mould
Specifications 1.Pallet mouldlife:1 million shots 2.Pallet mould cavity/core:P20H,or 2738 3.Pallet molding time:120s… plastic injection pallet mould                        TECHNICAL SPECIFICATIONS Type of mould Injection mould Small,medium,large mold Mold Material S136, P20, 718H , 2738 , NAK80 ,1.2311 etc Nr of Cavities 1+1,......Read More

Crate Mould

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Crate Mould
Specifications Size:L510xW350xH210mm customized design and professional proposals on crate weight and crate design; mold steel as specified plastic crate mould , vegetable crate injection mould let ZHILIAN become your trusted partner on the road to success, You image it, we manage it!   Crate Mould Features 1. Rotational mould design, reduce producti......Read More

Design rules

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Design rules
Essentials of a well-designed gate A properly designed gate will deliver a rapid, uniform, and preferably uni-directional mold filling pattern with a proper gate freeze-off time. Gate location The gate location should be at the thickest area of the part, preferably at a spot where the function and appearance of the part are not impaired. This leads the mate......Read More

Gate design overview

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Gate design overview
What is a gate? A gate is a small opening (or orifice) through which the polymer melt enters the cavity. Gate design for a particular application includes selection of the gate type, dimensions, and location. It is dictated by the part and mold design, the part specifications (e.g., appearance, tolerance, concentricity), the type of material being molded, t......Read More

Runner balancing

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Runner balancing
Importance of balanced flow Balanced flow into the cavities is a prerequisite for a quality part. This can be achieved by changing the runner size and length. Changing the gate dimension may give a seemingly balanced filling. However, it affects the gate freeze-off time greatly, which is detrimental to part uniformity. Whenever possible, a naturally balance......Read More

Hot runner systems

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Hot runner systems
Overview The ideal injection molding system delivers molded parts of uniform density, and free from all runners, flash, and gate stubs. To achieve this, a hot runner system, in contrast to a cold runner system, is employed. The material in the hot runners is maintained in a molten state and is not ejected with the molded part. Hot runner systems are also re......Read More

Determining runner dimensions

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Determining runner dimensions
Factors you’ll need to consider The diameter and length of runners influence flow resistance. The higher the flow resistance in the runner, the higher the pressure drop will be. Reducing flow resistance in runners by increasing the diameter will use more resin material and cause a longer cycle time if the runner has to cool down before ejection. First......Read More

Designing runner cross sections

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Designing runner cross sections
Common designs There are several common runner cross-sectional designs. They are illustrated in Figure 1. Full-round runner Trapezoidal runner Modified trapezoidal runner (a combination of round and trapezoidal runner) Half-round runner Rectangular runner Recommended cross-sectional designs The first three runner cross-sectional designs listed above are gen......Read More

Determining sprue dimensions

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Determining sprue dimensions
General guidelines The dimensions of the sprue depend primarily on the dimensions of the molded part and especially its wall thickness. Here are some general guidelines you should consider: The sprue must not freeze before any other cross section. This is necessary to permit sufficient transmission of holding pressure. The sprue must de-mold easily and reli......Read More

Planning the runner system layout

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Planning the runner system layout
Basic layouts There are three basic runner system layouts typically used for a multi-cavity system. These layouts are illustrated in Figure 1 below. Standard (herringbone) runner system “H” bridge (branching) runner system Radial (star) runner system FIGURE 1. Basic runner system layouts Balanced vs. unbalanced layouts Balanced layouts The R......Read More