Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Forming process of seed crystal bar chuck

A molding method and seed rod technology, applied in chemical instruments and methods, single crystal growth, crystal growth and other directions, can solve the problems of rough hole wall, poor finish, poor coaxiality between the inner hole of the chuck and the seed rod, etc. , to achieve the effect of reducing production cost, good coaxiality and high finish

Inactive Publication Date: 2002-08-07
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
View PDF0 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: (1) When casting at high temperature, the magnesia sand is easy to shift, resulting in a rough hole wall, poor finish, and prone to defects such as trachoma and pores.
(2) The coaxiality difference between the chuck inner hole and the seed rod

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
  • Forming process of seed crystal bar chuck
  • Forming process of seed crystal bar chuck
  • Forming process of seed crystal bar chuck

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] As mentioned above specific molding steps:

[0020] First make the chuck mold, such as figure 1 The structure shown, the base 1, is processed into a truncated cone shape with high-purity graphite, and there is a fixed center screw hole 109 with a depth of 8mm and M8 at the center of the large circular plane 101, and n=6 fixed molds are evenly distributed on the small circular plane. Core screw holes 103, 104, 105, 106, 107, 108, see figure 2 . There are n=6 chuck die cores 2, the diameter of each chuck die core 2 is 6mm, and the length is 80mm. One end of the chuck die core 2 has a threaded head 201 matching the fixed die core screw hole on the base 1, Such as Figure 4 shown. The other end has a diameter of 5 mm and a depth of 7 mm in the center hole 203, such as Figure 4 shown. First, the base 1 and the clamp core 2 are processed with a lathe using high-purity graphite. Then n=6 collet mold cores are fixed on the base 1 in the fixed mold core screw holes 103...

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 forming method of seed crystal bar holder uses iridium material and includes the processes of making hlder mould, making casting pattern, melting iridium material, casting, demoulding, annealing and cutting. The holder mould comprises base seat and holder mould core, said base seat contains n (n is less than or equal to 20 and greater than or equal to 1) mould core screw holes for fixing the holder mould cores on the base seat, one end of holder mould core is fixed on the base seat, and its another end is equipped with a dcentral internal hole in which a hole plug is pulgged, and the baseseat and holder mould core are made of high-purity grahpite or asbestos, and the hole plug is made up by adopting high melting point crystal. It can be formed only by using one-step process, and is applicable to growth of several crystals.

Description

Technical field: [0001] The invention relates to a forming method of a seed rod chuck, which is suitable for the seed rod chuck used in a crystal pulling growth furnace, or used in high-temperature smelting. Background technique: [0002] Platinum (melting point 1800°C) and iridium (melting point 2450°C) are refractory platinum group metals, which can be made into seed rod chucks, stirring rods, containers for high-temperature melts, etc. used in crystal growth devices. , glass and ceramic industry indispensable material. The production of platinum group metal rods and rods is in the advanced technology: the Crystal Group of Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences published "Precision of Iridium Vessels" in the "Physics" magazine (Volume III, Issue 4, page 234) in 1974. In the article "Casting", high-purity graphite is used as the mold core, and an inner hole with a diameter of 4-6 mm and a depth of 10-15 mm is machined on the mold core ...

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): C30B15/32
Inventor 徐月泉殷根弟金伟民徐军
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com