DE4140595A1 - Segmented heating device for heat treating spherical glass bodies - is made up of at least three parts held together by centring disc and surrounding spring - Google Patents

Abstract

Segmented heating device is made up of at least three segments held together in a flexible manner by a surrounding spring. The segments when assembled form a trough like upper surface which can accommodate glass bodies to be heat treated. Their bottom surface is flat and can be located on the heating plate. USE/ADVANTAGE - Heat treating glass circular pistons and ball-shaped vessels. Half the glass body is in close contact with the heating device so that no mechanical heat stress fields are created leading to fracture.

Description

The invention relates to the idea of glass round bottom flask or ball shaped glass vessels as used in the laboratory, to be able to heat optimally with flat heating plates. The tem temperature transfer is carried out by a trough-shaped segment Heating adapter achieved that from a good heat-conducting Material e.g. B. aluminum.

The trough-shaped segment heating adapter is on the bottom worked flat for good heat absorption from the heating plate. The top is up to a certain size for glass jars worked out in half.

To ensure an elastic and optimal fit of the trough-shaped To reach the heating adapter, this is in 3 or more seg elements divided by a circumferential spring, the seg holds together. The segments are entered by a put disk centered in the middle.

Due to the above, an elastic is lie of the segments reached on the glass round bottom flask, so that Tensions due to expansion or contraction on the Round glass flasks are avoided, as well as tolerance deviations the glass round bottom compensated.

The above-mentioned designs ensure optimum warmth Transfer from the flat heating plate to the round glass flask enough.  

State of the art is that fixed heating troughs for heating Glass flasks and vessels are used in the laboratory.

The disadvantage of fixed heating troughs is their rigidity and the unfavorable heat transfer, since the trough shape only 1/4 of the glass round bottom flask so that when cooling and Pulling the trough together does not shatter the round glass flasks en.

Another disadvantage is that the trough radius on the largest tolerance diameter of the glass round bottom must be, whereby with a minus tolerance the glass round col ben is no longer correctly in the trough.

Because of the different heat transfers with row heating different temperatures, Heating times and final values in the glass round to be heated piston. The fixed heating bowl also leads to a increased risk of breakage.

Find: Manufacturer of fixed heating troughs
C. Gerhardt
Factory for chem. Apparatus
GmbH & Co. KG P.O.Box 1628 5300 Bonn 1.

The task is solved by the features in the kenn Drawing part of claim 1.

The segment heating adapter preferably consists of a gut thermally conductive material z. B. aluminum. The bottom is flat so that it fits well on a Hotplate surface rests. With round heating plates one can Raised edge for centering the segment heating adapter be appropriate.

The top is for round glass flasks of a certain shape and size worked out so that it closes up to Half inserted into the trough-shaped segment heating adapter can be.

The segment heating adapter consists of 3 or more segments, by a circumferential tension spring in a groove being held. There is a groove in the middle of the segments loosely inserted disc that centers the individual segments, with simultaneous expansion and adaptability of the individual segments on the glass flask to be heated.

The surrounding tension spring and the loosely inserted disc in the middle lie on one level and allow there by slightly moving the segments outwards without to be misjudged. Due to the above, a uniform and optimal temperature transfer thanks to the flexible reached segments on the glass round bottom flask.  

In the drawings shows

Fig. 1 The segment heating adapter ( 2 ) in longitudinal section on a round heating plate, with a glass flask to be heated.

Fig. 2 The segment heating adapter ( 2 ) in longitudinal section AA with circumferential tension spring ( 5 ) and loose centering disc ( 6 ).

Fig. 3 The segment heating adapter ( 2 ) in view X with directions of movement ( 7 ).

Reference list
1 round glass flask
2 segment heating adapters
3 heating plate
4 hotplate housings
5 All-round tension spring
6 loose centering discs
7 Direction of movement of the segments.

Claims (3)

1. segment heating adapter for heating round glass pistons or spherical glass containers on flat heating plates, characterized in that the segment heating adapter is divided into 3 or more segments, which is held together flexibly and movably with a circumferential tension spring. The segments are trough-shaped for correspondingly large round glass pistons, and up to half can be inserted into the segment heating adapter. The floor is flat. 2. Segment heating adapter according to claim 1, characterized in that the individual segments in the middle of a loosely inserted disc, be centered in a groove that is on the same plane how the circumferential tension spring lies. 3. Segment heating adapter according to claims 1 and 2, characterized in that the he warming glass flask closing up to half elastic rest on the segments of the heating adapter without the through Heating, cooling or dimensional tolerances in the glass round column This creates a tension field with a risk of breakage.