The annealing process of Stents fulfils two functions. On the one hand, the desired hardness, and thus the recoil, must be set in a hard tube. On the other hand, the different temperatures cause crystal damage in the material after laser cutting. This crystal damage must be repaired in a temperature process, since microcracks in the material that may cause early failure of the product may result otherwise.


Heinz Schade GmbH designed  annealing furnaces specifically for the annealing process. The furnaces can be heated up to 1200° C and is thus also suitable for CoCr stents. The complete process is run under high vacuum to avoid distortion of the components by oxidation and reduces integration of harmful foreign atoms. Cooling off of the parts after annealing takes place under high vacuum as well. The advantages of high vacuum are thus present for the entire process duration.

 

Annealing Furnaces for Stents "HT-1000"

HT-1000

You can rely on the fact that with the HT-1000 no foreign atoms will be installed in your products during the thermal process and that extremely fine parts are properly processed without depositing any oxide.

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The HT-1000 is a high-vacuum annealing furnace that can heat its annealing stock (stents) in a high vacuum to temperatures of up to 1200°C. This prevents oxidation from taking place and as of specific temperatures, oxides are even reduced. An additional benefit is that no foreign atoms become integrated into the product during the thermal process, which would otherwise impair the properties of the material.

 

The vacuum is achieved by a high-vacuum turbo pump, which can attain a final pressure of <10E-5. The dry rotor booster pump ensures that no back diffusion of lubricants develops. And the tried and tested cooling method that is applied in the vacuum enables small particle sizes to be achieved. The integrated venting value enables quick aeration of the system, and, in combination with protective gas, the processing time is minimized. The number of annealed stents pro run depends on size.

 

The process is controlled and monitored by freely-programmable software, which takes all important parameters into account: i.e. different temperature profiles can be run in succession. Windows is known for its easy-to-operate interface and complies fully with the requirements set by FDA and CE regulations. Individual user accounts can be defined with different access rights. Process sequences are able to be saved in a chart and subsequently evaluated, while finished processes are stored in a so-called History File. In addition, modifications, services or other activities can be noted down in the Log Book. Database software is available (not included in scope of delivery) to be used to make backups of the data. A large number of process programs can be created and saved with the software. A further option is support of a host connection.

Technical Data:  
Materials: CoCr, NiTi, Steel; …
Process chamber: Quartz glass
Pipe diameter: useful inner diameter approx. 70 mm, length 200mm
Temperature: Process temperature from 30° to 850°C
 Vacuum:

High-vacuumpump <10E-5 mbar

Control: Programming via Windows PC with the enclosed software.
Dimensions without PC:

(L/W/H) 3200 x 800 x 1250 mm, Weight: 320 kg

Housing: Clean room-compliant design, top made of stainless steel.
Connection 400 V/ 50-60 Hz/ 5 KW, USB-Interface, 4 mm AD compressed air tube 6-8 bar filtered, Process gas 1-3 bar.
Scope of delivery: VA-unit, heating unit, quartz glass and shuttle. Software, Dongle, Operating Instructions in English.
Accessories: Gas flow unit, vacuum valve, Quartz set for CoCr; steel. PC-Win 7/8 for programming.
Miscellaneous: Special sizes and customizations on request.

 

All specifications arsubject to change without notice.

Annealing Furnaces for Stents "HT-1201"

HT-1201

You can rely on the fact that with the HT-1201 no foreign atoms will be installed in your products during the thermal process and that extremely fine parts are properly processed without depositing any oxide.

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The HT-1201 is a high-vacuum annealing furnace that can heat its annealing stock (stents) in a high vacuum to temperatures of up to 1200°C. This prevents oxidation from taking place and as of specific temperatures, oxides are even reduced. An additional benefit is that no foreign atoms become integrated into the product during the thermal process, which would otherwise impair the properties of the material.


The vacuum is achieved by a high-vacuum turbo pump, which can attain a final pressure of <10E-5. The dry rotor booster pump ensures that no back diffusion of lubricants develops. And the tried and tested cooling method that is applied in the vacuum enables small particle sizes to be achieved. The integrated venting value enables quick aeration of the system, and, in combination with protective gas, the processing time is minimized. The number of annealed stents pro run depends on size. Approx. 400 items, i.e. 16 mm long stents with a diameter of 1.8 mm can be processed in a single run.


The process is controlled and monitored by freely-programmable software, which takes all important parameters into account: i.e. different temperature profiles can be run in succession. Windows is known for its easy-to-operate interface and complies fully with the requirements set by FDA and CE regulations. Individual user accounts can be defined with different access rights. Process sequences are able to be saved in a chart and subsequently evaluated, while finished processes are stored in a so-called History File. In addition, modifications, services or other activities can be noted down in the Log Book. Database software is available (not included in scope of delivery) to be used to make backups of the data. A large number of process programs can be created and saved with the software. A further option is support of a host connection.

Technical Data:  
Materials: CoCr, NiTi, Steel; …
Process chamber: Quartz glass
Pipe diameter: useful inner diameter approx. 35 mm, length 120 mm
Temperature: Process temperature from 30°C to 1200°C
Vacuum:

High-vacuumpump <10E-5 mbar

Control: Programming via Windows PC with the enclosed software.
Dimensions without PC:

(L/W/H) 2170 x 710 x 1230 mm, Weight: 170 kg

Housing:

Clean room-compliant design, top made of stainless steel.

Connection:

230V/ 50-60Hz/ 2kW, USB-Interface.

Scope of delivery:

VA-unit, heating unit, quartz glass and shuttle. Software, Dongle, Operating Instructions in English.

Accessories:

Gas flow unit, vacuum valve, Quartz set for CoCr; steel. PC-Win 7/8 for programming.

Miscellaneous:

Special sizes and customizations on request.

 

All specifications arsubject to change without notice.