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Archive for the ‘Glass and metal syringes’ Category

GLASS AND METAL SYRINGES.

These are still used where plastic disposable syringes are not found.
There are a number of troubles that you can get with them, one is that they are leaking where the glass barrel is joined to the chromed brass pieces at each end, the cure is this.
Take a propane torch with a small burner on the end and very carefully heat the end of the syringe where it is joined on to the brass end, (heat the brass part not the glass, ) heat it very slowly so that you do not crack the glass.
When it is really hot the brass end will drop off the glass tube, clean the end of the glass tube and inside the connector.
You will see a groove that the glass sits in, this must be quite clean.
Now mix up some two part epoxy adhesive, hold the brass end in a vice to keep it steady and carefully fill the groove with epoxy adhesive.
Now gently put the glass tube in to the groove and give it a slight twist to ensure that it has seated properly on the bottom of the groove, make sure that it is upright.
Now you will need a hair dryer, hot air gun or a small propane flame, VERY CAREFULLY warm up the glue, (once again you are better off heating the brass than the glass), you will notice that it will start to go very soft and fill in any gaps and give a nice round finish, it will also go transparent and any air bubbles inside will rise to the surface.
It will also harden more quickly having been heated.
I must stress that you have to heat it very carefully as it will start to burn and go brown, if this happens you have to start all over again.
Any epoxy that runs down the side can be chipped off after you have allowed the epoxy to harden off for 24 hours or so.
Another point is that it is important to keep the barrels and pistons together, one is made to suit the other and so are not interchangeable.

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GLASS AND METAL SYRINGES.

These are still used where plastic disposable syringes are not found.
There are a number of troubles that you can get with them, one is that they are leaking where the glass barrel is joined to the chromed brass connection, the cure is this.
Take a propane torch with a small burner on the end and very carefully heat the end of the syringe where it is joined on to the brass, (heat the brass part not the glass) heat it very slowly so that you do not crack the glass.
When it is really hot the brass end will drop off the glass tube, clean the end of the glass tube and inside the connector.
There is a sort of groove that the glass sits in, this must be quite clean.
Now mix up some two-part epoxy adhesive, hold the brass end in a vice to keep it steady and carefully fill the groove with epoxy adhesive.
Now gently put the glass tube in to the groove and give it a slight twist to ensure that it has seated properly on the bottom of the groove, make sure that it is upright.
Now you will need a hair dryer, hot air gun or a small propane flame, VERY CAREFULLY warm up the glue, (once again you are better off heating the brass than the glass), you will notice that it will start to go very soft and fill in any gaps and give a nice round finish, it will also go transparent and any air bubbles inside will rise to the surface.
It will also harden more quickly having been heated.
I must stress that you have to heat it very carefully as it will start to burn and go brown, if this happens you have to start all over again.
Any epoxy that runs down the side can be chipped off after you have allowed the epoxy to harden off for 24 hours or so.
Another point is that it is important to keep the barrels and pistons together, one is made to suit the other and so are not interchangeable.

Read Full Post »