THIẾT TRÌNH THIẾT KẾ CHẾ TẠO KHUÔN MẪU ĐỦ 25 BÀI_12_EN

(Cold runner)

• Tasks and technical requirements?
• The composition and characteristics of the part, how to calculate the size and layout silver spray
stalk, entrance channel and plastic

• Computing applications, systems design to channel cool computer mouse shell (using Creo to
design)


Tasks and technical requirements?

• Guide channel system cools the molten resin from the nozzle of the injection molding machine via Roll puff,
canals and then into the cavity vent

• c) Design Principles
• - Make sure the filling and the cavity.
• - Choosing the right location for vents why not affect
• Cosmetic products and mechanical properties of the product.
• - Be sure to get the product quickly.


Composed of cold channel system


1. Roll Silver Spray



nozzle

• The size of a nozzle


stalk injection


Part materials in that branch from freezing early obstruction in the design flow
should further slow cooling tail.? • Usually located in the intersection of the channel
branch


R0.5 should bo corners


Channel system


I. FLOW IN channel


The thickness of the plastic layer freezes affected:
• Speed Inkjet
• The Melting
• The temperature of the mold


II.KENH his people

• 2. Kenhnhua: is the connection between injection and vents Roll

Request of canals


Specifications channel

Có thểtính đường kính thủy lực dựa vào công thức:


• The surface area of the smallest cut.? • Speed slow cooling.? • Less friction.? • It helps maintain core slowly cools heat and
pressure.? • Difficult for machining between two concentric half mold


2.2 The type of channel cross section.


•Larger surface area for effective trapezoidal channel
correction should lose heat faster.
• Ease of processing.


• Do not cool section should make funeral friction, pressure, irregular.
• Ease of processing.


The size of the channel (there are 2 methods

• Size calculation based on cross section cut

D: channel diameter (mm)
W: weight of products (g)
L: channel length (mm)
or:
D ': diameter reference channel
fL: coefficient length


• The relationship between the diameter of the main channel and branch channels:
• Dc: The main canal diameter (mm).
• Dn: branched channel diameter (mm).
• N: number of diverters