Tray mould features *The product is one-shot molded and with high dimension precision and good appearance quality. *This product is a latticed pallet and 4-way non-reversible plastic pallet that is universal for use due to its dimensions conforming to state standards. *To improve product...
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Tray mould features
*The product is one-shot molded and with high dimension precision and good appearance quality.
*This product is a latticed pallet and 4-way non-reversible plastic pallet that is universal for use due to its dimensions conforming to state standards.
*To improve product strength, steel pipes are arranged crosswise at the bottom and surface; to prevent steel pipes from rusting, steel pipes were made of steel strips subject to HDG treatment.
*Made from HDPE or PP, free of poisons and hazards, moisture proof and mould proof, clean and contamination-free. (injection molded plastic pallet)
*Parts that have anti-slipping requirements shall incorporate non-slipping sheets to guarantee a secure use.
*There is a box with a lid to accommodate RFID chip at the center of the bottom to serve to realize informatization management.
*At both sides of the entry for forklift lie round corners. Bevel angles are designed at the bottom of the entry to reduce collision with forklift. Parts that collide with forklift frequently have thicker walls to reduce damage.
Selection of the Runner Cross-sectional Shape
The runner is a path for making the molten plastic flow from the sprue to the molded product. The cross-sectional shape of the runner is selected depending on the size of the molded product, the type of plastic, the estimated molding conditions, etc.
The basic standards for selecting the runner cross-sectional shape are explained here.
The figure below shows some typical runner cross-sectional shapes.
The runner is selected from the following three types.
1)The type carved on the moving half
2)The type carved on the fixed half
3)The type carved on both the fixed half and the moving half.
The selection among these is made appropriately based on the restrictions imposed by the shape of the molded product, the mold parting position, etc.
The symbols in the figure have these meanings: : Most suitable, : Suitable, : Not suitable
The most important role of the runner is to make the molten plastic flow in a condition in which no pressure loss is present. An unnecessarily large volume runner has the bad effects of increasing the scrap, worsening the material cost, lengthening the molding cycle, increasing the waste material, etc.
An index of the efficiency of a runner is the diameter and area of the inscribed circle in the cross-sectional shape. If the area of the inscribed circle increases, the area for hot plastic to flow becomes wide, and hence the molten plastic can flow easily.
Consequently, a runner with a circular cross section is the most ideal one. However, since it will be necessary to carve the runner in both the fixed side and the movable side, the cost of manufacturing the mold increases. In order to solve these problems, a rectangular cross-sectional shape runner or a runner with a semicircular cross-sectional shape that is made still deeper is used.
It is desirable to provide an angle at the side surface of the runner for separating from the mold. In addition, the inner surface of the runner is polished to a smooth surface using a rubber grinder or by carrying out lapping, thereby preventing pressure loss.
If you need make tray mold, welcome to contact Tuofang Mould sales team!
Hot Tags: molding injection tray plastic mould, China, suppliers, factory, customized, quotation, made in China, Industrial Product Mold, injection plastic mold for pallet, Industrial Plastic Pallet Injection Mould, two face pallet injection mold, Single pallet mould for injection, Double plastic injection pallet mould
Tray mould features
*The product is one-shot molded and with high dimension precision and good appearance quality.
*This product is a latticed pallet and 4-way non-reversible plastic pallet that is universal for use due to its dimensions conforming to state standards.
*To improve product strength, steel pipes are arranged crosswise at the bottom and surface; to prevent steel pipes from rusting, steel pipes were made of steel strips subject to HDG treatment.
*Made from HDPE or PP, free of poisons and hazards, moisture proof and mould proof, clean and contamination-free. (injection molded plastic pallet)
*Parts that have anti-slipping requirements shall incorporate non-slipping sheets to guarantee a secure use.
*There is a box with a lid to accommodate RFID chip at the center of the bottom to serve to realize informatization management.
*At both sides of the entry for forklift lie round corners. Bevel angles are designed at the bottom of the entry to reduce collision with forklift. Parts that collide with forklift frequently have thicker walls to reduce damage.
Selection of the Runner Cross-sectional Shape
The runner is a path for making the molten plastic flow from the sprue to the molded product. The cross-sectional shape of the runner is selected depending on the size of the molded product, the type of plastic, the estimated molding conditions, etc.
The basic standards for selecting the runner cross-sectional shape are explained here.
The figure below shows some typical runner cross-sectional shapes.
The runner is selected from the following three types.
1)The type carved on the moving half
2)The type carved on the fixed half
3)The type carved on both the fixed half and the moving half.
The selection among these is made appropriately based on the restrictions imposed by the shape of the molded product, the mold parting position, etc.
The symbols in the figure have these meanings: : Most suitable, : Suitable, : Not suitable
The most important role of the runner is to make the molten plastic flow in a condition in which no pressure loss is present. An unnecessarily large volume runner has the bad effects of increasing the scrap, worsening the material cost, lengthening the molding cycle, increasing the waste material, etc.
An index of the efficiency of a runner is the diameter and area of the inscribed circle in the cross-sectional shape. If the area of the inscribed circle increases, the area for hot plastic to flow becomes wide, and hence the molten plastic can flow easily.
Consequently, a runner with a circular cross section is the most ideal one. However, since it will be necessary to carve the runner in both the fixed side and the movable side, the cost of manufacturing the mold increases. In order to solve these problems, a rectangular cross-sectional shape runner or a runner with a semicircular cross-sectional shape that is made still deeper is used.
It is desirable to provide an angle at the side surface of the runner for separating from the mold. In addition, the inner surface of the runner is polished to a smooth surface using a rubber grinder or by carrying out lapping, thereby preventing pressure loss.
If you need make tray mold, welcome to contact Tuofang Mould sales team!
Hot Tags: molding injection tray plastic mould, China, suppliers, factory, customized, quotation, made in China, Industrial Product Mold, injection plastic mold for pallet, Industrial Plastic Pallet Injection Mould, two face pallet injection mold, Single pallet mould for injection, Double plastic injection pallet mould
