Injection Molding | Plastics Technology
网页2024年9月26日 — Revisiting the '5 M's' of Molding. All injection molding ultimately comes down to the “Man, Mold, Machine, Material and Method.”. But those key aspects can be viewed differently if you’re auditing mold changes before startup or troubleshooting changes for an already validated process. Read More. 27 Mar 2024.
Where and How to Vent Injection Molds: Part 3
网页2019年5月1日 — The best method of venting this type of part (Fig. 3C) is to put a vent along the entire edge, but just shy of the corners. This results in a much greater amount of vent flow area for the compressed air to exhaust through, and still protects the corners. Figures 3A, B and C depict different examples of “spot” vents.
Know Your Mold Coatings | Plastics Technology
网页2004年12月1日 — PVD coatings are applied at temperatures from 250 to 500 C (482 to 932 F). The coater, mold builder, heat-treatment facility, and end-user have to work together to make sure the tempering temperatures of the mold components are not exceeded by the coating temperature. Douglas is located at.
How to Mount an Injection Mold | Plastics Technology
网页2017年5月31日 — IN SET-UP MODE: 26. Advance the moving platen up against the back of the mold. a. Look and listen for the knockout rods binding or bending. 27. Lower the chain hoist slightly to remove any tension. 28. Set the die …
Cleaning Molds–Part II Blasting with Dry Ice
网页2007年7月1日 — It’s versatile. Dry ice can be used to clean a variety of equipment other than just molds. It’s effective at cleaning injection screws, barrels, internal mixers, and other equipment—when not needed in the toolroom. It has low operating costs. Dry-ice pellets for single line systems cost about 20¢/lb.
Back to Basics on Mold Venting (Part 2: Shape, Dimensions, Details)
网页2019年4月1日 — Click to read part 1, the basics of mold venting and part 3, where and how to vent. Most material manufacturers specify a recommended vent-depth range for their resins. For runny, non-viscous, crystalline resins such as nylon, PE, or PP, the recommended vent depth can range from 0.0005 in. to 0.0010 in.
Molds & Tooling for Plastics Production | Plastics Technology
网页2023年11月2日 — Molds & Tooling for Plastics Production. Molds and tooling for plastics production are used in all processes to give the melted plastic its final shape. Includes molds, mold components, ejector pins, mold bases, nozzles, mold cores, mold cavities, mold texturing, laser marking. Molds & Tooling.
Cleaning Molds: Part I | Plastics Technology - ptonline.com
网页2007年6月1日 — This is true for two reasons: (1) Clean plates and tooling are critical to maximizing mold life and reliability and the quality of the product. (2) The vast majority of molds are still being cleaned completely by hand. New (and old) technology concerning cleaning equipment and mold design that could drastically cut cleaning hours and tooling ...
Avoid Common Mold Set-Up Mistakes | Plastics Technology
网页2003年7月1日 — Donnelly has 27 injection presses from 28 to 720 tons, executes an average of 30 (and as many as 55) mold changes a day, and usually performs from 190 to 210 set-ups weekly. Some production runs can be as short as 15 min, although a 10-hr run is the average. An extra 10 min on set-up can erase the profit on a run of less than 2 hr.
Tooling for Plastics Production | Plastics Technology
网页2024年9月23日 — Here's a method to assist with efficient dark-to-light color changes on hot-runner systems that are hot-tipped. Tooling for plastics production include molds, mold components, ejector pins, mold bases, nozzles, mold cores, mold …