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How to Join Plastic Parts

After plastic mold is ready,Splicing is arguably the most mature and simplest ways of fabricating or fastening two injection molding pieces together. Infact, splicing methods have been known even before other methods like welding, bolting or soldering. The concept of splicing involves the connection of pieces by using the surface adhesion between the plastic molding parts and the adhesives’ firmness or cohesiveness. One of the best features in splicing is an even distribution of stress. In addition, other benefits are that totally different materials can be brought together, large splicing areas can be made quickly, and the adhesive itself fills uneven surfaces. Nevertheless, splicing also involves certain pitfalls. In certain cases, the strength is limited and not all materials are suitable for splicing (Polyolefins), and proper storage of the chemicals is vital. Changes in temperatures will render problems for moist adhesives. Also, a different expansion between the plastic and the...
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Table Of Content: General: 1.1 Basic information Control of tool building progress Packaging and transportation Product Responsibility Flow diagram 1.2 Documents Drawings / CAD-files Moldflow report Preliminary Tool Drawings Final Tool drawings Progress reports Trial reports Cooling plan Hot-runner plan Hydraulic plan Checklist A General Technical Information: Tool Construction Tool base design Steel quality and Heat Treatment Screw bolds Tool centring and Tool Clamping Inter Locks Hoisting holes and lifting bolts Hoisting blocks Isolating plates Lubrication and cavity protection Date stamps and recycling inserts Painting Tool marking Cavity and Core Cavity/Core Marking Texture Coatings Cooling-connectors principles Venting O-rings Guiding Welding in Cavity and Core Shrinkage allowance Hot-runner Hot-runner Suppliers Principle of Hot-runner systems Principle of wire connections Heating central nozzle Cams and Slides Ejection Dismantling of Tool Spare Parts Switches Remarks General: 1.1...
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plastic mold machines Hourly Rates Dipped

plastic mold machines Hourly Rates Dipped Custom injection molders’ machine-hour rates dipped 1.3% on average in the second quarter of the year, according to 122 plants responding to our latest semi-annual survey. Rates have been dropping since the end of 2000. About 12% of respondents said their rates were lower in the second quarter than in the quarter before. Only 5% raised rates, and 83% did not change them at all. However, there were some signs that business was turning the corner at midyear. Molders’ average machine capacity utilization rose about 1.5 percentage points to 53%—still very low by historical standards. Almost 40% of respondents said their capacity utilization increased in the second quarter, versus 31% whose utilization was lower and 29% whose utilization was un­changed. This was the first time since early 2000 that more shops were gaining business than were losing it. Southeastern molders again enjoyed the highest capacity utilization, while those in the West had th...
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