Novel hot injection molding technology for vacuum sealed direct-current relay ceramic shell

A technology of DC relays and ceramic shells, applied in relays, circuits, electrical components, etc., can solve the problems of reduced porosity, complex binder composition, increased production costs, etc., and achieve the effect of improving the qualification rate

Inactive Publication Date: 2019-01-29
LOUDI ANTAEUS ELECTRONICS CERAMICS
View PDF5 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the composition of this binder is complicated, which increases the production cost
More

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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0044] Example 1

[0045] Processing small products (size: less than 35mm, wall thickness less than 3mm) a batch of vacuum sealed DC relay ceramic shells.

[0046] The new process of hot die-casting the ceramic shell of vacuum sealed DC relay, the steps are as follows:

[0047] S1. Weigh the ceramic powder according to the formula. The ceramic powder is prepared from the following weight fractions: alumina powder 93.5%, high territory 1.97%, calcium carbonate 3.25%, silicon dioxide 1.28%, and pour into the ball mill. Then add oleic acid, the amount of the oleic acid is 0.2% of the weight of the ceramic powder, ball milling, the ball milling time is 20 hours, and the ceramic powder is obtained;

[0048] S2. Weigh 3.5% of the modified microcrystalline wax according to the weight of the ceramic powder and put it into the chemical pulping machine to control the temperature of the wax, and control the temperature of the chemical pulping machine at 88°C. When the modified microcrystalline w...

Example Embodiment

[0057] Example 2

[0058] Products in process (size: 35mm-65mm, wall thickness 3-5mm) batch of vacuum sealed DC relay ceramic shells.

[0059] The new process of hot die-casting the ceramic shell of vacuum sealed DC relay, the steps are as follows:

[0060] S1. Weigh the ceramic powder according to the formula. The ceramic powder is prepared from the following weight fractions: alumina powder 93.5%, high territory 1.97%, calcium carbonate 3.25%, silicon dioxide 1.28%, and pour into the ball mill. Then add oleic acid, the amount of oleic acid is 0.3% of the weight of the ceramic powder, ball milling, the ball milling time is 24 hours, to obtain ceramic powder;

[0061] S2. Weigh 4% of the modified microcrystalline wax according to the weight of the ceramic powder and put it into the chemical pulping machine to control the temperature of the wax, control the temperature of the chemical pulping machine at 90°C, wait until the modified microcrystalline wax is completely melted, and then a...

Example Embodiment

[0070] Example 3

[0071] Processing large products (size: more than 65mm, wall thickness greater than 5mm) a batch of vacuum sealed DC relay ceramic shells.

[0072] The new process of hot die-casting the ceramic shell of vacuum sealed DC relay, the steps are as follows:

[0073] S1. Weigh the ceramic powder according to the formula. The ceramic powder is prepared from the following weight fractions: alumina powder 93.5%, high territory 1.97%, calcium carbonate 3.25%, silicon dioxide 1.28%, and pour into the ball mill. Then add oleic acid, the amount of the oleic acid is 0.4% of the weight of the ceramic powder, ball milling, the ball milling time is 28 hours, and the ceramic powder is obtained;

[0074] S2. Weigh 6% of the modified microcrystalline wax according to the weight of the ceramic powder and put it into the chemical pulping machine to control the temperature of the wax, and control the temperature of the chemical pulping machine at 92°C. When the modified microcrystalline ...

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

PropertyMeasurementUnit
Sizeaaaaaaaaaa
Wall thicknessaaaaaaaaaa
Login to view more

Abstract

The invention discloses a novel hot injection molding technology for a vacuum sealed direct-current relay ceramic shell, comprising the following steps of: conducting ball-milling on a ceramic powder,then adding the ball-milled ceramic powder to a melt mixture of modified microcrystalline wax and paraffin wax, conducting continuous stirring, cooling and aging, pulping the aged wax, conducting stirring, injection molding and dewaxing. The qualified rate of small products prepared by the technology disclosed by the invention is increased by 8 percentage points on average; the qualified rate ofmedium-sized products is increased by 10 percentage points on average; and the qualified rate of large-scale products is increased by 25 percentage points or more, and sometimes even more than 50 percentage points.

Description

technical field [0001] The invention relates to the technical field of manufacturing relay ceramic shells, in particular to a new process of vacuum-sealed direct-current relay ceramic shell hot die-casting. Background technique [0002] Hot die-casting molding, also known as hot-press injection molding, is a production process that is widely used in the production of various types of ceramics. The basic principle is to use the characteristics of paraffin wax to melt when heated and to solidify when cooled, to uniformly mix non-plastic barren ceramic powder with hot paraffin liquid to form a flowable slurry, inject it into a metal steel mold under a certain pressure, and wait for cooling. After the wax slurry is solidified, the blank is removed from the mold. After the blank is properly repaired, it is buried in the adsorbent, and then heated in a kiln for bisque firing (dewaxing). Then the dewaxed bisque-fired piece is sintered at high temperature to form the final ceramic...

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): C04B35/10C04B35/634C04B35/632C04B35/622H01H49/00
CPCC04B35/10C04B35/622C04B35/632C04B35/63496C04B2235/3208C04B2235/3418C04B2235/349H01H49/00
Inventor 康丁华方剑颜勇徐育林周伍
Owner LOUDI ANTAEUS ELECTRONICS CERAMICS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap