• Skip to main content
  • Skip to secondary menu
  • Skip to primary sidebar

Mechanicaleng blog

siemens nx tutorial & injection molding technology

  • Plastic molding
  • Siemens nx
    • nx modeling
    • nx drafting
    • nx sketching
    • nx assembly
  • Mechanical basic
    • mechanical standard
    • Mechanism video
  • microsoft office
    • microsoft word
    • powerpoint
    • excel tips
  • About me
  • CONTACT ME
Home » Plastic molding » Injection molding design construction slide core

Injection molding design construction slide core

December 17, 2018 by mechanicaleng blog 1 Comment

Slide core injection molding solve undercut in the products. This post will explain construction and design of it. How does slide core work?

Post contents

  • I. Construction of slide core system.
  • II. How does slide core of injection molding work?
  • III. How to design slide core.

I. Construction of slide core system.

Two pictures below will explain construction of slide core system.

slide core injection molding 2D construction
slide core injection molding 2D construction
slide core injection molding 3D construction
slide core injection molding 3D construction

1. Product.

2. Cavity plate.

3. Slide locking block: It uses to assemble an angular pin and cavity plate. It will increase strength for the angular pin when mold closed.
4. Angular pin: This pin has draft angle from 10 deg ~25 deg. It will transfer vertical movement of cavity plate to horizontal movement of slide core. Angular pin usually fixes by cavity plate and slide locking block.
5. Slide core: Slide core usually assembles in core plate. It will create shape of undercut.
6. Core plate

7. Spring: when angular pin and slide core separate, spring force will push slide core move forward.
8. Slide lock plate(slide core guide): This part will fix slide core move following horizontal. Slide locking block and slide core always have friction. It is easy for changing if slide has broken.
9. Core stop block: This part will stop movement of slide core when mold opening.

II. How does slide core of injection molding work?

1. When mold opening, because angular core pin attach in cavity so it is fixed.

2. Angular pin move following the core plate. Because slide lock plate, slide core will move following horizontal under force of angular pin.

3. When angular pin and slide core separate, spring will push slide core move  continuously.

4. When mold closing, angular pin will touch in the hole of slide core. Slide will move back and mold closing.

III. How to design slide core.

slide core injection molding calculation
slide core injection molding calculation

A: Undercut amount
B: Slide stroke amount

α: Tilt angle of slide core

β: Tilt angle of angular pin
B = A + 5 mm up
α = β+(2- 5)
β <= 20 ᵒ deg.

Gap between an angular pin and hole of slide core: ~0.5 mm.

Related posts:

Cooling for slider mold injectionslider cooling channel construction in mold injection three plate mold constructionConstruction injection mold classification Default Thumbnailejector system in injection molding three plate mold constructionPlastic injection molding three plate mold

Filed Under: Plastic molding Tagged With: injection molding design

Reader Interactions

Comments

  1. Devaraj says

    September 29, 2021 at 1:03 pm

    How do you cooling a mould temperature

    Reply

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Primary Sidebar

Recent Posts

  • what is spur gear | introduction
  • Mechanical engineering skills from training process
  • What is Inox | Stainless Steel?
  • How to create thread in nx
  • nx assembly| create a new part from the same part
  • how to calculate sum of squares in Excel
  • How to active GC toolkits in Siemens NX
  • How to create a sphere in nx
  • How to create a cone in nx
  • How to create a cylinder in nx

Copyright © 2023 · Magazine Pro on Genesis Framework · WordPress · Log in