Mold for avoiding secondary plastic injection molding cracking of magnetic ring and implementation method of mold

A realization method and plastic technology, applied in the field of magnetic ring injection molding, can solve problems such as easy cracking of magnets

Active Publication Date: 2020-10-27
HENGDIAN GRP DMEGC MAGNETICS CO LTD
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The magnets are easy to crack when these two materials are secondary plastic injection molding, especially the cracking ratio of the magnetic steel material is more
[0003] To solve this kind of problem, the inner diameter of the mold and the outer diameter of the product are designed to reduce the outward expansion of the magnet during the secondary injection molding, so as to reduce the cracking of the magnet. It has been proved that this method cannot completely solve the problem.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Mold for avoiding secondary plastic injection molding cracking of magnetic ring and implementation method of mold
  • Mold for avoiding secondary plastic injection molding cracking of magnetic ring and implementation method of mold
  • Mold for avoiding secondary plastic injection molding cracking of magnetic ring and implementation method of mold

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] See Figure 1-6 The present invention provides the following technical solutions: a mold for preventing secondary plastic injection cracking of a magnetic ring, comprising a support base 1, a locking block 3 is embedded above the support base 1, and a compression module is sleeved above the locking block 3 2. The locking block 3 is a spring structure.

[0029] Further, a gap 4 is provided between the compression module 2 and the support base 1, a first slope 5 is provided between the compression module 2 and the locking block 3, and a second slope 5 is provided between the support base 1 and the locking block 3. Degree 6.

[0030] By adopting the above technical solution, when clamping the mold, the gap 4, the first inclination 5 and the second inclination 6 can make the locking block 3 shrink inward without crushing the mold, and the locking block 3 shrinks inward to clamp Tighten the magnet to realize the secondary plastic injection, the magnet will not expand outwards a...

Embodiment 2

[0032] The difference between this embodiment and the first embodiment is that: further, the compression module 2 is also sleeved outside the support base 1, and the inner diameter of the lower end of the compression module 2 is equal to the outer diameter of the support base 1.

[0033] By adopting the above technical solution, the pressing module 2 is guided by the support base 1, so that the pressing module 2 can move vertically downward.

[0034] Further, the method for implementing the mold for preventing the secondary plastic injection cracking of the magnetic ring according to the present invention includes the following steps:

[0035] (1) A locking block 3 is embedded above the support base 1;

[0036] (2) The locking block 3 is a spring structure;

[0037] (3) A compression module 2 is sleeved above the locking block 3;

[0038] (4) The locking block 3 is also sleeved on the outside of the support base 1, and is slidably connected with the support base 1.

[0039] In summary, th...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a mold for avoiding secondary plastic injection molding cracking of a magnetic ring. The mold comprises a supporting seat, a locking block is arranged on the upper portion of the supporting seat in an embedded manner, the upper portion of the locking block is sleeved with a mold press block, and the locking block is of a spring structure. The invention further discloses animplementation method of the mold for avoiding secondary plastic injection molding cracking of the magnetic ring. According to the mold, the locking block of the spring structure is arranged, a clearance is arranged between the mold press block and the supporting seat, a first inclination is set between the mold press block and the locking block, and a second inclination is set between the supporting seat and the locking block; during mold compounding, the locking block can be reduced inwards by means of the clearance, the first inclination and the second inclination, crushing damage cannot happen to the mold, and a magnet can be clamped when the locking block is reduced inwards; and when secondary plastic injection molding is achieved, the situation that the magnet is expanded outwards, and consequently cracking is caused cannot happen.

Description

Technical field [0001] The invention belongs to the technical field of magnetic ring injection molding, and specifically relates to a mold for preventing secondary plastic injection cracking of a magnetic ring and an implementation method thereof. Background technique [0002] Induction magnetic rings for automobiles and home appliances require plastic gears, threads and external connections. There are roughly two types of magnetic rings: ferrite magnetic steel materials for magnets and plastic magnetic materials for magnets. Magnets are prone to cracking during secondary plastic injection molding of these two materials, especially the cracking ratio of magnetic steel materials is higher. [0003] To solve this kind of problem, the sliding design of the inner diameter of the mold and the outer diameter of the product is adopted to reduce the outward expansion of the magnet during the second injection molding to reduce the occurrence of magnet cracking. The reality proves that this ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B29C45/16B29C45/26
CPCB29C45/16B29C45/26
Inventor何国栋
OwnerHENGDIAN GRP DMEGC MAGNETICS CO LTD