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| Insert Moulding | |||
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| Posted by: Fingo ® 11/20/2009, 01:18:15 Author Profile eMail author Edit |
Has anyone had experience insert moulding clear windows into a larger moulding, similar to an electric kettle? We have a large 30 litre bucket that we want to over mould around a clear strip window. Early prototypes crack and split because of the shrinkage of the second stage moulding over the rigid window. materials are polypropylene. Does anyone have any ideas of how this can be fixed? We cannot use lower shrinkage materials because of cost, flow length and chemical resistance problems |
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| : Insert Moulding -- Fingo | Post Reply | Top of thread | Engineering Forum |
| Posted by: zack_zhang ® 11/26/2009, 22:10:56 Author Profile eMail author Edit |
Add waterproof construction |
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| Posted by: Marky ® 11/20/2009, 10:03:08 Author Profile eMail author Edit |
Hi and welcome to the forum....Can your mold house help. It sounds more like a process problem. They should be able to modify the process or fix the tooling. |
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| : : Insert Moulding -- Marky | Post Reply | Top of thread | Engineering Forum |
| Posted by: Fingo ® 11/22/2009, 18:28:17 Author Profile eMail author Edit |
Hi Marky, Its one of those things. We see that it has been done successfully in other products (such as the kettles) but our early trials indicate that we are going to have big problems. The trial we have done have been done with a similar tool and not the production tooling. Production tooling has been put on hold until we can increased our confidence that the process will work. |
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| Posted by: Marky ® 11/23/2009, 07:08:24 Author Profile eMail author Edit |
Can you post a picture? Good idea to put the tooling on hold. But it's still a process issue. It's one of those things....you have to change the process until you get it right. You may find that you get it right the next time or after 100 times. You'll need to work side by side with your molding house...they're the experts. |
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