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Temperature cascade control method of vacuum degreasing sintering furnace in metal powder injection molding

A technology of injection molding and vacuum degreasing, applied in furnace control devices, furnaces, furnace components, etc., can solve problems such as low accuracy, inability to truly display the temperature in the material box, and product performance degradation, to improve the process and improve the follow-up. Sex, the effect of shortening working hours

Active Publication Date: 2015-06-17
NINGBO HIPER VACUUM TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims at the disadvantages in the prior art that the temperature inside the material box cannot be truly displayed, and the waiting time for heating needs to be estimated artificially, and the accuracy is not high, resulting in a decrease in product performance. The temperature cascade control method of the metal powder injection molding vacuum debinding sintering furnace

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  • Temperature cascade control method of vacuum degreasing sintering furnace in metal powder injection molding
  • Temperature cascade control method of vacuum degreasing sintering furnace in metal powder injection molding
  • Temperature cascade control method of vacuum degreasing sintering furnace in metal powder injection molding

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Embodiment 1

[0028] The temperature cascade control method of metal powder injection molding vacuum degreasing sintering furnace, such as Figure 3 to Figure 6 As shown, it includes an insulating material 9, a heating element 2 and a material box 3 arranged in the sintering furnace body 1, a material plate 4 is arranged in the material box 3, a ceramic plate 17 is arranged on the material plate 4, and the product 5 is placed on the ceramic plate 17 on. It also includes a main regulator, a sub-regulator connected in series with the signal output end of the main regulator, a power controller, a first thermocouple 7 whose front end is placed inside the material box 3, and a second thermocouple whose front end is placed in the sintering furnace body 1. The pair 8 and the first thermocouple 7 are arranged on the material box 3 through the thermocouple holes opened on the wall of the material box 3, and the power controller is connected with the output end of the auxiliary regulator. The first ...

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Abstract

The invention relates to a metal powder injection molding vacuum degreasing sintering furnace, and discloses a temperature cascade control method for a metal powder injection molding vacuum degreasing sintering furnace. The main regulator performs automatic calculation according to the input values ​​of SV1 and PV1, and then the main regulator The output value of the sub-regulator is used as the set value SV2 of the sub-regulator, and the sub-regulator automatically calculates according to SV2 and the detected temperature value PV2 of the sub-loop system, and calculates the heating power required by the heating element, and the power controller performs according to the heating power. Power percentage output, through which the power controller controls the heating power of the heating element, so that PV1 is close to SV1. The invention adopts the temperature cascade control method to control the heating power of the heating element in the furnace body of the sintering furnace, and truly displays the temperature of the product itself; improves the dynamic characteristics of the process, improves the followability of the temperature, facilitates the improvement of the process, and shortens the working hours; can quickly Overcome secondary disturbances entering the secondary loop system.

Description

technical field [0001] The invention relates to a metal powder injection molding vacuum degreasing sintering furnace, in particular to a temperature cascade control method for a metal powder injection molding vacuum degreasing sintering furnace. Background technique [0002] The temperature control design of general metal powder injection molding vacuum degreasing sintering furnace is as follows: figure 1 As shown, the interior of the sintering furnace body 1 is provided with an insulating material 9 and a heating element 2, the material box 3 is placed in the middle of the sintering furnace body 1, and the material box 3 is provided with a material plate 4 for placing the product 5, and a thermocouple 6 Set outside the material box 3. works like figure 2 As shown, a single-loop control system is adopted, in which SV is the temperature setting value, PV is the actual temperature monitoring value of thermocouple 6, and the PID of the regulator performs automatic calculatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/22B22F3/10F27D19/00
Inventor 刘鹏徐文立胡芳
Owner NINGBO HIPER VACUUM TECH CO LTD
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