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The role of mould parts in injection mould

Return list Reffer:NITONI Click number:- Release time:2018-05-25

In the era of industry 4.0, more and more mold manufacturers have paid attention to mold parts, especially in injection molding, stamping, casting and other fields. A high - quality mold parts, like a set of molding mold of the viscera, they also have a different mission. So, taking injection mold as an example, let's look at the structural composition of injection mold and the role of each part:

1. Molded parts

Concave die (cavity) : a concave part forming the surface of a plastic part.

Concave plate (cavity plate) : a plate part having a concave outline on the surface of a face shaped plastic part.

The part that is placed in the die setting section is called the die setting cavity plate.

The part of the moving die placed is called the moving model cavity plate.

Core: forming convex parts on the inner surface of plastic parts.

Side core: forming part of side hole, side concave or side convex platform of plastic parts, which can be pulled out and reset manually or with sliding block.

Insert: when there are parts in the die or core that are easy to be damaged or hard to be processed as a whole, they are made separately from the main part and embedded into the local forming parts of the main part.

Movable inserts: according to the requirements of technology and structure, moulding must be carried out together with the plastic parts to separate the forming parts from the plastic parts.

Block: a number of forming parts manufactured separately for the combination of a concave die or a core, which can be called a concave die block and a core block respectively.

Threaded core: a forming part that forms the internal thread of a molded part. It can be a movable threaded core (outside the die) or a threaded core that rotates within the mold.

Threaded ring: a forming part that forms the outer thread of a molded part. It may be an active threaded ring (integral or combined) or a threaded ring that rotates within the mold.

2. Guide parts

Guide post: a cylindrical part fitted with a guide sleeve (or hole) mounted on the other half of the mould to ensure the precision of the movement guide of the opening and closing die.

There are two types of lead posts and shoulder posts.

Push plate guide column: with the push plate guide sleeve (or hole) is a sliding fit, used for the movement of off - mold mechanism guide cylinder two.

Guide sleeve: with the guide column installed on the other half of the mould, it is used to ensure the relative position of the moving die and the fixed die, and to ensure the precision of the movement guide of the die opening and closing die.

There are two types of direct guide sleeve and lead guide sleeve.

Push and pull guide sleeve: fixed on the push plate, which is in smooth cooperation with the push plate guide column, used for the circular sleeve of the movement guide of the demoulding mechanism.

3. Push out parts

Push rod: the rod parts that directly push out the plastic parts or the casting system's coagulant are cylindrical head push rod, shoulder push rod and flat head push rod, etc.

Cylinder head push rod can be used to push the top push - top plate, also known as pre - rod.

Push pipe: directly push out the plastic parts of the tubular parts.

Push plate: directly push out the plastic parts of the plate.

Push ring: a ring or disc part that partially or wholly pushes out a plastic part.

Push rod fixing plate: a plate type part that secures the ejection and resetting parts and the guide sleeve of the pushing plate.

Push rod: supporting push - out and resetting parts, directly transfer machine tool push - out force of the plate.

Connecting push rod: connecting push plate and push plate fixed plate, transmitting thrust bar.

Pull rod: it is set directly opposite the main channel and has a special head shape, which can pull out the main channel coagulant. The head shape is Z shape, ball head shape, inverted cone shape, mushroom shape and cone head shape, etc.

Push runner plate: as the open die movement, the casting system of the condenser plate parts.

Also called thrust plate.

4. Core drawing (typing) parts

Oblique pin (oblique guide column) : a cylindrical part that is tilted to the parting surface for assembly. With the opening and closing of the mold, the sliding block (or concave die block) generates reciprocating movement within the mold.

Sliding block: moving along the guide structure, driving the side core (or concave die assembly) to complete the core pulling and resetting.

Side core slide: side core or slide block made of integral material.

Sometimes several sliders are formed into modules, which need to be separated first before the plastic parts can be removed smoothly.

Slide guide plate: with the slide guide surface of the slide block to cooperate, play the role of slide guide plate.

Wedge block: a part with a bevel Angle used to lock the slider when closing the die.

Bend pin: a rectangular or square section bending part that allows the slider to act as a core pulling and resetting movement with the opening and closing of the mold.

Slanting block: the concave die block that USES the combination of the inclined plane and the die sleeve to produce sliding, which has the function of forming, pushing and core pulling (parting).

Inclined groove guide plate: a plate type part with a inclined guide groove, which makes the slider move with the core pulling and resetting of the groove along with the opening and closing of the mould.

5. Support fixed parts

Positioning plate: the choice of fixing the fixing plate on the fixed working table of the injector.

Moving die seat plate: a piece of plate that holds a moving die fixed to a moving table of an injector.

Die plate: plate part of a fixed plate (cavity), also called a cavity plate.

Core type fixing plate: plate type parts of fixed core.

Die sleeve: a frame-sleeve structural part that allows the insert or assembly to be positioned and tightened together, or a frame-sleeve part that secures the die or core.

Supporting plate: plate that prevents the axial displacement of forming parts (die, core or insert) and guiding parts, and bears the forming pressure.

Pad: adjust the closing height of the mould to form the block parts of the ejection space required by the demoulding mechanism.

Bracket: adjust the closing height of the mould, form the ejection stroke space required by the demoulding mechanism, and make the moving die fixed on the "L" block part of the injector, also known as the die foot.

Supporting column: a columnar part set between a supporting plate of a moving die and a supporting plate of a moving die to enhance the rigidity of a supporting plate of a moving die.

6. Positioning and limiting parts

Positioning ring: the circular ring or circular plate-shaped part that makes the main channel of the mold align with the nozzle of the injector and determines the position of the mold installation on the injector.

Tapered positioning parts: when the die is closed, the corresponding matching taper surface is used to make the moving part and the fixed part accurately positioned.

Resetting rod: a rod member fixed to a push rod fixing plate that resets the release mechanism by the closing action of the mould.

Limit nail: the part that supports and adjusts the demoulding mechanism, prevents the demoulding mechanism from being affected by foreign matter obstacle in resetting, or restricts the bar piece of the final position after the core is removed from the sliding block.

Pitch bar: a rod member used to restrict the pulling or stopping action of a template within a specified distance when the die is split.

Locating pin: a cylindrical member that holds two or more templates in place to prevent displacement.

Fixed - distance drawing board: a board member used to restrict the pulling or stopping of a template only within a limited distance when the die is split.

7. Cooling and heating parts

Cooling nozzle: pipe fitting used to connect rubber pipe and pass cold water into the mould.

Baffle: metal strip or plate set in the cooling water passage in the mould to change the direction of cooling water

Heating plate: the plate with heating structure, such as hot water (oil), steam or electric heating element, is set to ensure that the mold temperature meets the requirements of plastic forming process.

Heat shield: a piece of plate that prevents heat transfer from diffusing.

8. Other

Gate: directly in contact with the injector nozzle, with the main channel liner parts.

Gate insert: to improve the service life of the gate, replaceable wear-resistant metal insert is used for the gate.

Flow channel plate: the plate pieces specially set for opening the diverging channel can be divided into heat flow channel plate and temperature flow channel plate.

Secondary nozzles: nozzles that provide inlet passage directly or indirectly from the hot runner plate (column) to the cavity.


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