Pressure casting real-time monitoring device in mould cavity

A technology of real-time monitoring and cavity, which is applied in the field of die-casting, can solve the problems of loss of fluidity and pressure transmission ability, ineffective transmission of casting pressure, lack of verification and real-time monitoring, etc., and achieve the effect of improving precision and product efficiency

Active Publication Date: 2016-05-11
广东鸿图武汉压铸有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current monitoring methods are mainly based on Pascal’s law, that is, the molten metal in the molten state is simplified into a fluid, and the force on the molten metal is the same everywhere. However, the actual filling process may not be the case. For example, the cold material at the front end of the filling, that is, the water tail, is at the beginning of pressurization. The molten metal near the feed inlet first solidifies and loses fluidity and pressure transmission ability, so that the casting pressure cannot be effectively transmitted. Although the forming pressure of each part of the casting can be predicted by numerical simulation methods, it lacks actual verification and effective real-time monitor

Method used

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  • Pressure casting real-time monitoring device in mould cavity
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  • Pressure casting real-time monitoring device in mould cavity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] like figure 1 As shown, according to an embodiment of the invention, a die-casting real-time monitoring device is provided,

[0026] First of all, its basic components are composed of valve core 2, valve sleeve 1, and valve seat 5. Valve sleeve 1 is fixed on the mold through screw holes on the flange side. The outer wall of valve core 2 cooperates with the inner wall of valve sleeve 1. The front end is used as the molding surface of the mold cavity, and the structure of the valve seat 5 is as follows Figure 4 As shown, the valve seat 5 is a concave cavity structure, and the inner side of the concave cavity cooperates with the outer wall of the valve core 2 to support the valve core 2, and at the same time, it can ensure that the valve core 2 can slide back and forth freely. The stepped holes in the axial direction communicate with each other, and the stepped holes are used to place and fix the second pressure sensor 22. When the valve core 2 receives the pressure from...

Embodiment 2

[0029] like figure 1 As shown, first of all, its basic components are composed of valve core 2, valve sleeve 1, and valve seat 5. Valve sleeve 1 is fixed on the mold through screw holes on the flange side, and the outer wall of valve core 2 cooperates with the inner wall of valve sleeve 1. The front end of the valve core 2 is used as the molding surface of the mold cavity, where two gas overflow holes 3 are symmetrically opened with the axis of the valve core 2 as the center line, and the front end of the gas overflow hole 3 is formed into a trumpet-shaped expansion structure. The filter 8 is placed to prevent the aluminum liquid from entering the gas discharge hole 3, and the rear end has an upward first pressure sensor fixing hole 18 that communicates with the outside world. The gas overflow hole 3 is directly connected to the mold cavity, and the end of the gas overflow hole is equipped with a first pressure sensor 4. According to the principle of the connecting chamber, th...

Embodiment 3

[0031] In order to better combine the above-mentioned measurement method with temperature measurement, in this embodiment, in addition to the technical means adopted in Embodiment 1 and Embodiment 2, a temperature measurement method is also added at the same time, A through hole for setting a thermocouple tube 9 is provided at the axis of the valve core 2, and a thermocouple fixing seat 11 is provided at the end of the valve core 2. The thermocouple tube 9 is composed of a thermocouple shell and a thermocouple wire. The metal wire is exposed and can be directly in contact with the molten metal; the thermocouple tube 9 is fixed with a thermocouple tube fixing table 10 at the front end of the valve core 2, and the other end of the thermocouple tube 9 is fixed in the thermocouple fixing seat hole 19, wherein the circle The disc-shaped thermocouple tube fixing platform 10 cooperates with the thermocouple fixing platform hole 19 of the valve core 2 to jointly play the role of fixing...

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Abstract

The invention discloses a pressure casting real-time monitoring device in a mould cavity. The pressure casting real-time monitoring device comprises a valve element and a valve sleeve for fixing the valve element in the mould cavity. The front end face of the valve element serves as a molded face, and a valve seat is further arranged on the rear end face of the valve element. The valve element is provided with gas exhaust and overflow holes, a trumpet-shaped opening is formed in the front end of each gas exhaust and overflow hole, and the openings are filled with filter materials. A first pressure sensor fixing hole is formed in the tail end of one gas exhaust and overflow hole in the direction perpendicular to the axial direction, and a first pressure sensor is arranged in the first pressure sensor fixing hole. A second pressure sensor is arranged at the tail end of the valve element, and when the valve element slides front and back relative to the valve seat, the second pressure sensor is triggered. A thermocouple tube is further arranged at the axis of the valve element in the axial direction, and the rear end of the thermocouple tube is fixed through a thermocouple fixing seat arranged in the valve element. According to the monitoring device, various important technological parameters in the mould cavity can be precisely measured and monitored in real time.

Description

technical field [0001] The invention belongs to the field of die-casting, and more particularly relates to a real-time monitoring device for die-casting in a mold cavity. Background technique [0002] Die casting (referred to as die casting) is a metal precision molding technology, which is a complex dynamic thermodynamic process. A casting method that obtains die castings under rapid solidification. The above-mentioned casting molding method involves the following major process elements: ① temperature, including the temperature of the aluminum liquid and the mold temperature, ② filling speed, ③ pressure, including the gas back pressure of the cavity during filling and the metal pressure during filling, especially during the pressurization process. Therefore, the ability to monitor the above process elements in real time plays a very important role in improving the precision of casting molding. [0003] Generally speaking, first of all, thermocouples can be directly embedd...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D17/32
CPCB22D17/32
Inventor 刘学强刘华陈家海赵健荣周海军王培建万里
Owner 广东鸿图武汉压铸有限公司
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