Uniform drying system for formwork assembly tree rotating body of drying room

Abstract

The invention belongs to the technical field of investment casting mold shell drying, and particularly relates to a uniform drying system for a mold shell assembly tree rotating body of a drying room. Comprising a control unit, a sensing detection unit, an air blowing unit and a moisture absorption unit, the moisture content of a temperature and humidity detection formwork group tree in the drying room can be detected online in real time through a control system, the air speed and the air volume of the air blowing unit are controlled according to feedback signals, and the rotating speed of a dehumidification unit is controlled; the working efficiency of the dehumidification unit is further controlled, and energy saving and high efficiency are achieved; the U-shaped drying device is adopted for conducting air blowing and drying on the formwork assembly rotating body in the three directions of the outer side, the lower side and the inner side, and in cooperation with the action that the formwork assembly rotating body in the drying room revolves around the center of the drying room and rotates around the rotating shaft of the formwork assembly rotating body, three-dimensional drying can be evenly and efficiently conducted on each formwork on the formwork assembly rotating body; the drying efficiency is greatly improved, and the drying yield is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of dry mould shell for investment casting, and particularly relates to a uniform drying system for a mould shell group tree rotating body used in a drying room. BACKGROUND

[0002] Investment casting is a metal hot processing technology mastered by human beings relatively early. At present, many enterprises adopt the lost wax method when casting. The premise of this method is to first make a wax mold through a corresponding mold, then prepare a shell through the wax mold, and then the mold shell needs to be dried. At present, many enterprises still adopt the natural air drying production mode, and the air drying speed is relatively slow. Due to improper storage stress concentration, it also causes casting failure. Some enterprises adopt the active drying mode for processing. The drying room mostly uses high-temperature air to dry the objects. For example, a rotating mold shell drying air tower is disclosed in Chinese Invention Patent CN2596294Y. The fan sleeve is installed on the upper part of the rack, and an axial flow fan is arranged above the fan sleeve. The fan sleeve is connected with the air duct below, and the air duct is connected with a micro pendulum pin wheel reducer at the lower part. There is a sealing device at the connection between the lower part of the fan sleeve and the air duct. The cylinder wall of the air duct is provided with louvers. The air is compressed into the air duct through the axial flow fan at the top, and the air in the air duct is sent out through the rotating louvers, and is blown to the mold shell hung on the drying line to dry the mold shell. Although the drying efficiency is greatly improved, the drying uniformity still needs to be improved.

[0003] Chinese Invention Patent CN201611047970.2 discloses a wax mold drying method and device, and specifically discloses that the driving device is started to drive the fixing device and the wax mold group to rotate according to the starting instruction, and the driving device is stopped to stop the fixing device and the wax mold group from rotating according to the stopping instruction. The wax mold is rotated to remove the mold washing liquid and other impurities on the wax mold group by using the centrifugal principle of rotation, which has a certain drying effect, but is not suitable for drying the mold group after multi-layer slurry hanging, and the spinning mode is not conducive to the stability of the mold shell.

[0004] Chinese Invention CN205147218U discloses a precise rocker arm wax mold air drying device, and specifically discloses that the device includes a lifting appliance and a wax mold group tree connected below the lifting appliance, and a synchronous belt is driven by a power equipment to drive circular transmission and rotate the gear. The wax mold group tree can be rotated together under the driving of the synchronous belt, and the rotating wax mold group tree is dried by air guns, but the internal drying effect of the mold shell group tree rotating body formed by multiple mold shell groups is lacking. Therefore, the drying of each mold piece is uneven, which affects the overall drying efficiency and reduces the yield. SUMMARY

[0005] In order to solve the above technical problems, the present application is proposed. To solve the problem of uneven drying efficiency of the mold shell in the field of investment casting.

[0006] In order to achieve the above-mentioned purpose, the technical scheme of the present application provides a uniform drying system for a mold shell group tree rotating body of a drying room, comprising a control unit, a sensing detection unit, a blowing unit and a moisture absorption unit, wherein the blowing unit comprises a first blowing assembly, a second blowing assembly and a third blowing assembly, the first blowing assembly, the second blowing assembly and the first blowing assembly are distributed in a U shape, specifically, the bottom of the first blowing assembly is connected with the first end of the second blowing assembly at a 90° angle, the end of the second blowing assembly is connected with the first end of the first blowing assembly at a 90° angle, and the end of the first blowing assembly is connected to the mold shell drying center rack, and the blowing device is arranged in a U shape as a whole.

[0007] Preferably, the first blowing assembly is provided with a plurality of blowing units, each blowing unit comprising a fan integrated towards the front.

[0008] Preferably, the first blowing assembly has a folding function, and the first blowing assembly comprises a first mounting plate, a first unit, a second unit, a third unit, a connecting rod and a cylinder; the first unit is provided with a cylinder connecting rod, one end of the cylinder is connected to the cylinder connecting rod, and the other end is connected to the first mounting plate; one end of the first mounting plate is provided with a connecting frame; under the action of external force, the cylinder moves to drive the first blowing assembly to realize the folding function.

[0009] Preferably, the first unit is provided with a first gear on the upper part of the two sides; the second unit is provided with a second lower gear on the lower part of the two sides, and a second upper gear on the upper part of the two sides; the third unit is provided with a third gear on the lower part of the two sides; one end of the first unit is hinged to the first mounting plate through the connecting frame; the other end of the first unit is connected with one end of the second unit through the meshing of the first gear and the second lower gear; the other end of the second unit is connected with the third unit through the meshing of the second upper gear and the third gear.

[0010] Preferably, the connecting frame has a first hinge and a second hinge at both ends; the first hinge is hinged to the first unit; the second hinge is hinged to the connecting rod.

[0011] Preferably, the connecting rod comprises a first connecting rod, a second connecting rod, a third connecting rod and a fourth connecting rod, one end of the first connecting rod is hinged at the second hinge of the connecting frame, the other end of the first connecting rod is hinged with the second connecting rod, the second connecting rod is Z-shaped and has a first connecting position, a second connecting position, a third connecting position and a fourth connecting position, the first connecting position of the second connecting rod is hinged with the upper end of the first connecting rod, the fourth connecting position is hinged with the lower end of the third connecting rod, the second connecting position is connected with the central shaft of the first gear, and the third connecting position is connected with the central shaft of the second lower gear; the lower end of the third connecting rod is hinged with the fourth connecting position of the second connecting rod, and the upper end of the third connecting rod is hinged with one end of the fourth connecting rod; the fourth connecting rod is L-shaped, one end of the fourth connecting rod is hinged with one end of the third connecting rod, and the other two ends are respectively connected with the central shaft of the second upper gear and the central shaft of the third gear.

[0012] Preferably, the second blowing assembly comprises a second mounting plate, and a plurality of upward blowing fan integrations are arranged on the second mounting plate; the third blowing assembly is provided with a third mounting plate, and a plurality of leftward blowing fan integrations are arranged on the third mounting plate.

[0013] Preferably, the control unit comprises a programmable logic controller for running a high-level optimization algorithm and an industrial computer providing a human-computer interaction interface, and a sensing element and an executing element in communication connection with the programmable logic controller and the industrial computer; the executing element comprises a frequency converter and a power regulator; and the industrial computer runs a multivariable predictive control program, a dew point optimization program and a state monitoring program.

[0014] Preferably, the humidity sensor for monitoring the absolute humidity of the air in the drying room, the near-infrared moisture sensor or the microwave moisture sensor for online and non-contact monitoring of the formwork group tree, and the rotating shaft torque sensor for monitoring the driving load state; each sensor is in signal connection with the control unit.

[0015] The U-shaped drying device is used for blowing and drying the formwork group tree rotating body from the outside, the lower side and the inside, and cooperates with the action of the formwork group tree rotating body revolving around the center of the drying room and revolving around its own rotating shaft in the drying room, so that each formwork on the formwork group tree rotating body can be uniformly and efficiently three-dimensionally dried, the drying efficiency is greatly improved, and the good product rate is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0017] Figure 1 is the installation position of the drying device in the drying room of the present application (the first blowing assembly is folded).

[0018] Figure 2 is the left view schematic diagram of the drying device of the present application (the first blowing assembly is unfolded).

[0019] Figure 3 is the overall structure schematic diagram of the drying device in the present application.

[0020] Figure 4 is the structure schematic diagram of the second connecting rod in the connecting rod in the present application.

[0021] Label explanation: 1-first blowing assembly, 2-second blowing assembly, 3-third blowing assembly, 4-drying room, 5-mold shell group tree rotating body, 6-mold shell group tree; 11-first unit, 12-second unit, 13-third unit, 14-first mounting plate, 141-connecting frame, 15-connecting rod, 16-cylinder; 111-cylinder connecting rod, 112-first gear; 121-second lower gear, 122-second upper gear; 131-third gear; 141-connecting frame, 1411-first hinge, 1412-second hinge; 151-first connecting rod, 152-second connecting rod, 153-third connecting rod, 154-fourth connecting rod; 1521-first connecting position, 1522-second connecting position, 1523-third connecting position, 1524-fourth connecting position; 21-second mounting plate; 31-third mounting plate. DETAILED DESCRIPTION

[0022] The present application will be further described in conjunction with the embodiments. The advantages and characteristics of the present application will be more clear with the description. However, these embodiments are only exemplary and do not constitute any limitation to the scope of the present application. Those skilled in the art should understand that the details and forms of the technical solutions of the present application can be modified or replaced without departing from the spirit and scope of the present application, and such modifications and replacements all fall within the protection scope of the present application.

[0023] It should be noted that in the present application, relational terms such as "first" and "second", and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises a" does not, without more constraints, preclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0024] In the present embodiment, Figure 1 is a schematic diagram of the installation position of the drying device of the present application in the drying room (the first blowing assembly is folded). Figure 2 is a left view schematic diagram of the drying device of the present application (the first blowing assembly is unfolded). Figure 3 is a schematic diagram of the overall structure of the drying device in the present application. Figure 4 is a schematic diagram of the structure of the second connecting rod in the connecting rod in the present application. As Figures 1-4 shown, the present application provides a uniform drying device for a formwork group tree rotating body for a drying room, comprising: a first blowing assembly, a second blowing assembly and a third blowing assembly, the first blowing assembly, the second blowing assembly and the first blowing assembly are distributed in a U shape, specifically, the bottom of the first blowing assembly is connected at a 90° angle with the first end of the second blowing assembly, the end of the second blowing assembly is connected at a 90° angle with the first end of the first blowing assembly, and the end of the first blowing assembly is connected to the formwork drying center rack, and the blowing device as a whole is arranged in a U shape.

[0025] In the present embodiment, the first blowing assembly is provided with a plurality of blowing units, each blowing unit comprising a fan integrated for blowing forward, and the blowing direction is towards the formwork group tree rotating body as Figure 1 shown above.

[0026] In the present embodiment, the first blowing assembly has a folding function, and the first blowing assembly comprises a first mounting plate, a first unit, a second unit, a third unit, a connecting rod and a cylinder; the first unit is provided with a cylinder connecting rod, one end of the cylinder is connected to the cylinder connecting rod, and the other end is connected to the first mounting plate, one end of the first mounting plate is provided with a connecting frame, and the cylinder moves under the action of external force to drive the first blowing assembly to realize the folding function.

[0027] In the embodiment, the first unit is hinged to the first mounting plate through the connecting frame at one end, and connected to the second unit at the other end through the first gear meshing with the second lower gear.

[0028] In the embodiment, the connecting frame has a first hinge and a second hinge at each end, and the first hinge is hinged to the first unit, and the second hinge is hinged to the connecting rod.

[0029] In the embodiment, the connecting rod includes a first connecting rod, a second connecting rod, a third connecting rod and a fourth connecting rod, one end of the first connecting rod is hinged to the second hinge of the connecting frame, the other end of the first connecting rod is hinged to the second connecting rod, the second connecting rod is Z-shaped and has a first connection, a second connection, a third connection and a fourth connection, the first connection of the second connecting rod is hinged to the upper end of the first connecting rod, the fourth connection is hinged to the lower end of the third connecting rod, the second connection is connected to the central axis of the first gear, and the third connection is connected to the central axis of the second lower gear; the lower end of the third connecting rod is hinged to the fourth connection of the second connecting rod, and the upper end of the third connecting rod is hinged to one end of the fourth connecting rod; the fourth connecting rod is L-shaped, one end of the fourth connecting rod is hinged to one end of the third connecting rod, and the other two ends are respectively connected to the central axis of the second upper gear and the central axis of the third gear.

[0030] In the embodiment, the second blowing assembly includes a second mounting plate, and a plurality of upward blowing fans are integrated on the second mounting plate. The third blowing assembly is provided with a third mounting plate, and a plurality of leftward blowing fans are integrated on the third mounting plate. In the embodiment, the upper end of the third blowing assembly of the drying device is connected to the top radial plate of the drying room, and simultaneously performs revolution motion with the corresponding position of the mold shell group tree rotating body.

[0031] In the embodiment, the "shell assembly tree" refers to a core process in precision casting, especially investment casting, namely "assembly tree". It refers to the single wax model (wax model) according to the design combination, welding on a common "pouring system" (usually referred to as "die head" or "pouring rod"), forming a tree structure, and then forming a drying shell through a number of slurry and sand shell forming processes. The shell assembly tree rotating body in the application refers to a rotating hanging disc that suspends a plurality of shell assembly trees. The rotating hanging disc not only revolves around the center of the drying room and revolves around its own axis, but the shell assembly tree itself does not revolve. That is, the shell assembly tree rotating body, because it is suspended on the hanging disc in a ring-shaped and symmetrical manner, the center of the hanging disc has a cavity, and the first blowing assembly of the drying device is located in the cavity after being unfolded, and blows from the inside to the outside. Dry, effectively solve the problem of incomplete drying and slow drying of the inner layer of the rotating body during rotation.

[0032] In use, the first blowing assembly of the drying device is in a folded state in the initial state. After the manipulator suspends the shell assembly tree rotating body at the position of the drying device, under the control of the control system, the first blowing assembly of the drying device at the position is unfolded to form an internal cavity of the shell assembly tree rotating body, and blows from the inside to the outside. When the whole drying room reaches the preset drying time, all the shell assembly trees are dried, under the control of the central control system, the cylinder of the first blowing assembly is retracted, and the first unit is hinged to the first mounting plate through the connecting frame at one end. The other end of the first unit is connected to the other end of the second unit through the engagement of the first gear and the second lower gear. The other end of the second unit is connected to the third unit through the engagement of the second upper gear and the third gear, and the first blowing assembly is folded under the transmission of the connecting frame. Similarly, when the cylinder is elongated, the first blowing assembly is unfolded.

[0033] In the embodiment, the intelligent control system adopts a programmable logic controller and an industrial computer in a cooperative architecture. The programmable logic controller serves as a bottom-layer real-time controller and is responsible for executing the sequential control of the equipment. The industrial computer serves as an upper-layer monitoring and optimization platform and is connected with the programmable logic controller through an industrial Ethernet communication. The industrial computer runs a multivariable predictive control program, a dew point optimization program and a state monitoring program for realizing advanced process optimization and decision-making. The execution elements of the system include a frequency converter for driving motor speed control, an electromagnetic valve for controlling the air cylinder, and a frequency converter for controlling the rotation speed of the fans of the blowing assembly. The detection sensor unit includes a humidity sensor for monitoring the absolute humidity of the air in the drying room, a near-infrared moisture sensor or a microwave moisture sensor for online and non-contact monitoring of the mold shell group trees, and a rotating shaft torque sensor for monitoring the driving load state. The signals output by the sensors are all connected to the corresponding input modules of the intelligent control system to provide real-time data basis for control decision-making.

[0034] The present application has the advantages that the control system can detect the temperature and humidity in the drying room and the moisture content of the mold shell group trees in real time, and control the wind speed and volume of the blowing unit and the rotation speed of the dehumidifying unit according to the feedback signals, thereby controlling the working efficiency of the dehumidifying unit, saving energy and improving the efficiency and good product rate of the mold shell drying. The U-shaped drying device is used to blow dry the mold shell group trees from the outside, the underside and the inside, and the mold shell group trees rotate around the center of the drying room and rotate around their own shafts, which can uniformly and efficiently dry every mold shell on the mold shell group trees in three dimensions, greatly improving the drying efficiency and the good product rate.

[0035] The embodiments in the above embodiments can be further combined or replaced, and the embodiments only describe the preferred embodiments of the present application, and do not limit the concept and scope of the present application. Without departing from the design idea of the present application, various changes and improvements to the technical solutions of the present application made by those skilled in the art all belong to the protection scope of the present application.

Claims

1. A uniform drying system for a rotating mold shell assembly in a drying chamber, characterized in that: The device includes a control unit, a sensing and detection unit, a blowing unit, and a moisture absorption unit. The blowing unit includes a first blowing assembly, a second blowing assembly, and a third blowing assembly. The first blowing assembly, the second blowing assembly, and the first blowing assembly are arranged in a U-shape. Specifically, the bottom of the first blowing assembly is connected to the front end of the second blowing assembly at a 90° angle, and the end of the second blowing assembly is connected to the front end of the first blowing assembly at a 90° angle. The end of the first blowing assembly is connected to the mold shell drying center frame. The blowing device as a whole is arranged in a U-shape.

2. The drying system according to claim 1, characterized in that: The first blowing assembly is provided with a plurality of blowing units, each blowing unit including a forward-blowing fan integration.

3. The drying system according to claim 2, characterized in that: The first blower assembly has a folding function. The first blower assembly includes a first mounting plate, a first unit, a second unit, a third unit, a connecting rod, and a cylinder. The first unit is provided with a cylinder connecting rod. One end of the cylinder is connected to the cylinder connecting rod, and the other end is connected to the first mounting plate. One end of the first mounting plate is provided with a connecting bracket. The cylinder moves under the action of external force to drive the first blower assembly to achieve the folding function.

4. The drying system according to claim 3, characterized in that: The first unit has a first gear on the upper part of both sides; the second unit has a second lower gear on the lower part of both sides and a second upper gear on the upper part of both sides; the third unit has a third gear on the lower part of both sides; one end of the first unit is hinged to the first mounting plate through a connecting frame; the other end of the first unit is connected to one end of the second unit through the first gear meshing with the second lower gear, and the other end of the second unit is connected to the third unit through the second upper gear meshing with the third gear.

5. The drying system according to claim 4, characterized in that: The connecting frame has a first hinge and a second hinge at both ends; the first hinge is hinged to the first unit; and the second hinge is hinged to the connecting rod.

6. The drying system according to claim 5, characterized in that: The connecting rod includes a first connecting rod, a second connecting rod, a third connecting rod, and a fourth connecting rod. One end of the first connecting rod is hinged to the second hinge point of the connecting frame, and the other end of the first connecting rod is hinged to the second connecting rod. The second connecting rod is Z-shaped and has a first connecting point, a second connecting point, a third connecting point, and a fourth connecting point. The first connecting point of the second connecting rod is hinged to the upper end of the first connecting rod, and the fourth connecting point is hinged to the lower end of the third connecting rod. The second connecting point is connected to the central shaft of the first gear, and the third connecting point is connected to the central shaft of the second lower gear. The lower end of the third connecting rod is hinged to the fourth connecting point of the second connecting rod, and the upper end of the third connecting rod is hinged to one end of the fourth connecting rod. The fourth connecting rod is L-shaped, with one end hinged to one end of the third connecting rod, and the other two ends connected to the central shafts of the second upper gear and the third gear, respectively.

7. The drying system according to claim 6, characterized in that: The second air blowing assembly includes a second mounting plate on which a plurality of upward air blowing fans are integrated; the third air blowing assembly includes a third mounting plate on which a plurality of left-blowing fans are integrated.

8. The drying system according to claim 1, characterized in that: The control unit includes a programmable logic controller (PLC), an industrial computer for running advanced optimization algorithms and providing a human-machine interface, and sensing and actuating elements communicatively connected to the PLC and the industrial computer; the actuating elements include a frequency converter; the industrial computer runs a multivariable predictive control program, a dew point optimization program, and a condition monitoring program.

9. The drying system according to claim 8, characterized in that: A humidity sensor for monitoring the absolute humidity of the air inside the drying chamber, a near-infrared moisture sensor or a microwave moisture sensor for online, non-contact monitoring of the mold shell group, and a rotary shaft torque sensor for monitoring the driving load status; each sensor is signal-connected to the control unit.

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