Mold base is a comprehensive name used for the parts for enclosing the cavity for plastic injection mold, and also has the role of directly installing the mold to the plastic injection molding machine.
What are the stages of injection molding?
The process of injection molding is divided into 6 major steps as shown below.
- Clamping.
- Injection.
- Dwelling.
- Cooling.
- Mold opening.
- Removal of products.
Introduction to Functions of Mold Base Parts
Fixed Clamping Plate: Holds The fixed side of the mold to the fixed platen of the injection machine.
Fixed Cavity Plate: Used to hold the fixed cavity block, leader pin/bushing, and sprue bushing.
Locating Ring: It is used to locate the center of the injection machine so that the sprue bushing and the nozzle are aligned. Commonly fitted into the counterbore in the fixed clamping plate.
Movable Clamping Plate: Holds The movable side of the mold to the movable platen of the injection machine.
Movable Cavity Plate: Used to hold the movable cavity block, leader pin/bushing.
Ejector Retainer Plate: Holds the ejector pins and the return pins in place.
Spacer Block: Mounted between the movable clamping plate and the movable cavity plate to give space and allow the ejector plate to move when ejecting the part.
Return Pins: Same as ejector return pins. Make sure that the ejector unit is back in its original position when the mold closes.
Support Pillars: Bars placed between the spacer blocks to give additional support to the movable cavity plate.
Ejector Plate: Pushes the ejector pins and return pins at the same time. Mounted to the ejector retainer plate to form the ejector unit.
Sprue Bushing: Has a tapered hole through which the material is forced into the runner. It is butted up against the nozzle of the injection machine.
Leader Pins and Bushings: Precisely align the two halves of the mold base (fixed and movable).
FAQ’s
What are the 3 main parts of the injection mold?
An injection moulding machine consists of three basic parts: the mould, plus the clamping and injection units. The clamping unit holds the two halves of the injection mould together during the injection and cooling.
What must be explained?
Molding is a manufacturing process that involves shaping a liquid or malleable raw material by using a fixed frame, known as either a mold or a matrix. The mold is generally a hollow cavity receptacle, commonly made of metal, where liquid plastic, metal, ceramic, or glass material is poured.
What are the main elements of mold?
Feed system is the runner part for plastics to go into the cavity from the nozzle. It includes main runner, cold-slug well, sub-runner, and sprue. Molding components are the elements forming the product’s shape, like movable mold, stationary mold, cavity, core, molding rod, and vent.
What are Cavity and core methods?
Cavity and core: Core and cavity can be classified into 2 methods, integrated and nested methods.
- You can choose which method will define your cavity and core.
- Integrated: When the molded part is formed directly by the die.
- Nested: When the molded part is formed by the die components.
What are the benefits of Nested Cavity and Core?
- There is no restriction to the geometry of the molded part.
- Processing efficiency can be done when components are separated.
- Mold materials can be selected for better wear resistance and temperature control.
- Damaged components can be replaced easily and cost effectively.
What is core and cavity?
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The core is the male part which forms the internal shape of molding. The cavity is the female part which forms the external shape of molding.
Which component is used for mould alignment?
Guide pins and bushings. These provide the primary alignment of the mold halves. Parting line interlocks. These provide the precise centreline alignment between the A, B, and stripper plates.
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About Vardhman Dies & Mould Tools
Vardhman Dies & Mould Tools is one of the leading manufacturers, suppliers, and exporters of Mold Base Parts in India. These products are manufactured from high-quality materials that are long lasting and hard wearing, and produce excellent results. Materials are sourced from trusted and reliable vendors and are manufactured at our manufacturing unit using latest machineries in compliance with industry quality standards to meet the requirements of the Dies & Mould Tools Industries.
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At Vardhman Dies & Mould Tools, we supply Mould & Mould Base Accessories, Press tools Accessories, Die Springs, Mould Ejection System, Mould Alignment Products, Mould Latches, Mould Parting lock, Mould Date Indicators, Mould Cooling Products, Sprue Bush, Mould Base, Mould Counter, Mould Spray, Piercing Punches, Polyurethane Elastomers, Ball cage, and Dies and Mould Polishing and Finishing Tools that fit your production requirement and minimise overall cost.