The Causes Of Flow Marks In Die Castings And Their Elimination Methods

Publish Time: 06/10 2021 Author: Site Editor Visit: 17082

In the die-casting industry, everyone knows that defects on the surface of die-casting parts are common, and there are many types of defects, and the names are different in different places, such as flow marks, and some are called streaks. What is confusing is how the flow marks of die castings are produced, is there a way to solve them? What are flow marks on die castings?

The main feature of the flow mark of the die casting is that the surface of the casting presents a smooth pattern of partial depression that is consistent with the flow direction of the molten metal and can be felt by hand. Flow mark defects have no development direction and can be removed by polishing methods.

How do the flow marks of die castings occur?

Analysis of several reasons for flow marks:

Traces left by two metal streams filling the cavity out of sync;

Low mold temperature, such as zinc alloy mold temperature <150°C and aluminum alloy mold temperature <180°C, are prone to such defects;

The filling speed is too high;

Excessive amount of paint.

How to eliminate flow mark defects in die castings?

Solution:

Adjust the cross-sectional area or position of the gate;

Adjust the mold temperature and enlarge the overflow groove;

Properly adjust the filling speed to change the fluid state of the molten metal filling cavity;

The coating is thin and uniform.

Please keep the source and address of this article for reprinting: The Causes Of Flow Marks In Die Castings And Their Elimination Methods

Minghe Die Casting Company are dedicated to manufacture and provide quality and high performance Casting Parts(metal die casting parts range mainly include Thin-Wall Die Casting,Hot Chamber Die Casting,Cold Chamber Die Casting),Round Service(Die Casting Service,Cnc Machining,Mold Making,Surface Treatment).Any custom Aluminum die casting, magnesium or Zamak/zinc die casting and other castings requirements are welcome to contact us.

ISO90012015 AND ITAF 16949 CASTING COMPANY SHOP

Under the control of ISO9001 and TS 16949,All processes are carried out through hundreds of advanced die casting machines, 5-axis machines, and other facilities, ranging from blasters to Ultra Sonic washing machines.Minghe not only has advanced equipment but also have professional team of experienced engineers,operators and inspectors to make the customer’s design come true.

POWERFUL ALUMINUM DIE CASTING WITH ISO90012015

Contract manufacturer of die castings. Capabilities include cold chamber aluminum die casting parts from 0.15 lbs. to 6 lbs., quick change set up, and machining. Value-added services include polishing, vibrating, deburring, shot blasting, painting, plating, coating, assembly, and tooling. Materials worked with include alloys such as 360, 380, 383, and 413.

Zinc die casting design assistance/concurrent engineering services. Custom manufacturer of precision zinc die castings. Miniature castings, high pressure die castings, multi-slide mold castings, conventional mold castings, unit die and independent die castings and cavity sealed castings can be manufactured. Castings can be manufactured in lengths and widths up to 24 in. in +/-0.0005 in. tolerance.

ISO 9001 2015 certified manufacturer of die cast magnesium and mold manufacturing

ISO 9001: 2015 certified manufacturer of die cast magnesium, Capabilities include high-pressure magnesium die casting up to 200 ton hot chamber & 3000 ton cold chamber, tooling design, polishing, molding, machining, powder & liquid painting, full QA with CMM capabilities, assembly, packaging & delivery.

Minghe Casting Additional Casting Service-investment casting etc

ITAF16949 certified. Additional Casting Service Include investment casting,sand casting,Gravity Casting, Lost Foam Casting,Centrifugal Casting,Vacuum Casting,Permanent Mold Casting,.Capabilities include EDI, engineering assistance, solid modeling and secondary processing.

Casting Industries Parts Case Studies for: Cars, Bikes, Aircraft, Musical instruments, Watercraft, Optical devices, Sensors, Models, Electronic devices, Enclosures, Clocks, Machinery, Engines, Furniture, Jewelry, Jigs, Telecom, Lighting, Medical devices, Photographic devices, Robots, Sculptures, Sound equipment, Sporting equipment, Tooling, Toys and more.