Positioning mechanism for mounting centrifugal vacuum suction casting mold shell

Abstract

The utility model relates to a positioning mechanism for mounting a centrifugal vacuum suction casting mold shell, belongs to the technical field of centrifugal vacuum suction casting, and aims to solve the problems that in the prior art, when the mold shell is manually mounted, the personal safety is influenced by high temperature, and when the mold shell is mechanically hoisted, the positioning is poor, and the mounting period is long. The device comprises a center positioning rod and a power device, one end of the central positioning rod is connected with a power end of the power device, and a rod body at one end, far away from the power device, of the central positioning rod is driven by the power device to enter the vacuum suction casting mold cylinder to form a mounting end of the mold shell; a fixing piece is arranged on a rod body of the mounting end, and the mold shell is arranged at the mounting end of the center positioning rod in a sleeving mode through a liquid rising pipe and is fixed through the fixing piece to be mounted on the center positioning rod. By using the positioning mechanism, the installation of the mold shell and the riser tube in the centrifugal vacuum suction casting process is simple, convenient and fast, the personal safety of installation personnel is ensured, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a positioning mechanism for installing a centrifugal vacuum suction casting mold shell, belonging to the technical field of centrifugal vacuum suction casting. Background Art

[0002] In the casting process, centrifugal vacuum casting is a new casting process, which is a combination of vacuum casting, centrifugal casting and lost foam casting. This process makes full use of the advantages of vacuum casting filling, centrifugal casting shrinkage compensation, and adopts lost foam shell process to make molds, which can improve the process output rate and product quality.

[0003] In this process, the mold shell is installed in an inverted manner in the vacuum casting mold barrel, and one end of the liquid riser in the mold shell extends from the extension port at the bottom of the vacuum casting mold barrel to be used for inserting casting liquid for suction casting. Since the mold shell and the liquid riser are installed inverted, they are all completed in the centrifugal vacuum casting mold barrel.

[0004] In the existing process, the mold shell and the riser are installed manually. During the continuous production process, the high temperature of the mold shell and the riser under the continuous high temperature condition will cause personal safety to the installers. In order to avoid high temperature burns, the mold shell can be lifted by a lifting device and then installed in the vacuum suction casting mold barrel. However, due to the inverted lifting, the riser at the bottom is blocked by the mold shell, resulting in the inability to accurately position it and install it into the extension port at the bottom of the vacuum suction casting mold barrel. The installation takes a long time and the production efficiency is low. Therefore, there is an urgent need for a mechanism for the installation of centrifugal vacuum suction casting mold shells to solve the problems of manual installation of mold shells in the prior art, which may affect personal safety due to high temperature, and poor positioning and long installation period when the mold shell is mechanically lifted. Utility Model Content

[0005] The utility model aims to provide a positioning mechanism for installing a centrifugal vacuum casting mold shell to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a positioning mechanism for the installation of a centrifugal vacuum casting mold shell, comprising a center positioning rod and a power device; one end of the center positioning rod is connected to the power end of the power device, and the rod body of the center positioning rod at one end away from the power device is driven by the power device to enter the vacuum casting mold barrel, forming the installation end of the mold shell; a fixing piece is provided on the rod body at the installation end, and the mold shell is arranged on the installation end of the center positioning rod through a liquid riser tube, and is fixed to the center positioning rod by the fixing piece, and the center positioning rod is driven by the power of the power device to move out in the direction away from the vacuum casting mold barrel, driving the mold shell to move to the module installation position, and the center positioning rod continues to move out, driving the fixing piece to separate from the liquid riser tube, and completing the installation of the mold shell.

[0007] Specifically, the cross-sectional shape of the rod body at the installation end of the center positioning rod is adapted to the cross-sectional shape of the cavity in the tube of the riser tube. This arrangement enables the riser tube to be stably fitted with the center positioning rod when the riser tube is sleeved on the center positioning rod, so that when the center positioning rod is driven by the power of the power device to drive the mold shell to move, the mold shell remains stable, thereby improving the installation accuracy of the mold shell.

[0008] Specifically, the cross section of the rod body at the installation end of the center positioning rod and the cross section of the cavity in the tube of the liquid riser are circular structures, and the cross section radius of the rod body at the installation end of the center positioning rod is 1 mm smaller than the cross section radius of the cavity in the tube of the liquid riser. This arrangement facilitates the installation of the liquid riser and can fix the position of the liquid riser.

[0009] Specifically, the rod body at the end of the installation end of the center positioning rod is provided with a conical chamfer, so as to facilitate the rapid and accurate installation of the liquid riser on the center positioning rod, thereby reducing the difficulty of positioning and installing the center positioning rod and the liquid riser.

[0010] Specifically, the fixing member is a guide sleeve; the guide sleeve is a circular ring structure, and the fixing sleeve is arranged on the outside of the rod body at the installation end.

[0011] Specifically, the cross-sectional size of the circular ring structure of the guide sleeve is larger than the cross-sectional size of the tube body of the liquid riser, and the liquid riser is fixedly mounted on the center positioning rod by the tube body abutting against the circular ring surface of the guide sleeve. This arrangement can better fix the center positioning rod and ensure the rigidity of the center positioning rod. In addition, during the extension process, the center positioning rod can accurately and quickly reach the center position of the suction casting chamber to achieve the purpose of accurate positioning.

[0012] Specifically, the power device includes a mounting frame and a cylinder; a fixed connecting piece is provided at the bottom of the mounting frame for fixed installation of the mounting frame; a hollow mounting cavity is provided along the frame body inside the mounting frame for fixed installation of the cylinder; the power end of the cylinder extends from the top of the mounting frame to constitute the power end of the power device.

[0013] Specifically, the cylinder is a single-piston cylinder. The present application adopts a single-piston cylinder so that during the working process, the stability of the extension speed of the center positioning rod can be ensured, and the uniform speed movement of the whole stroke can be ensured.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. This application sets up a positioning mechanism to replace manual installation of the mold shell, thereby avoiding personal safety hazards caused by high temperature of the mold shell during continuous production.

[0016] 2. On the basis of the above, the present application sets a center positioning rod and a single piston cylinder to realize that the center positioning rod is driven by the single piston cylinder to enter the vacuum suction casting mold tube from the extension port of the riser tube at the bottom of the vacuum suction casting mold tube, and then the mold shell and the riser tube are installed on the guide sleeve of the installation end of the center positioning rod, and then the center positioning rod is driven out by the single piston cylinder to drive the mold shell and the riser tube to move to the installation position. After the mold shell is connected to the vacuum suction casting mold tube, as the center positioning rod is moved out, the riser tube is separated from the center positioning rod to complete the installation of the mold shell. The use of the positioning mechanism of the present application makes the installation of the mold shell and the riser tube in the centrifugal vacuum suction casting process simple, convenient and fast, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The utility model is a schematic structural diagram of a positioning mechanism for installing a centrifugal vacuum casting mold shell.

[0018] Among them: 1. Center positioning rod; 2. Guide sleeve; 3. Exhaust pipe; 4. Single piston cylinder; 5. Intake pipe; 6. Fixing bolt; 7. Mounting frame; 8. Pad; 9. Movable ejector rod. DETAILED DESCRIPTION

[0019] In order to make the purpose and advantages of the utility model more clear, the utility model is specifically described in combination with the following embodiments. It should be understood that the following text is only used to describe one or several specific implementations of the utility model, and does not strictly limit the protection scope of the specific request of the utility model.

[0020] See also Figure 1 A positioning mechanism for installing a centrifugal vacuum casting mold shell comprises a center positioning rod 1 and a power device; one end of the center positioning rod 1 is connected to the power end of the power device, and the rod body of the center positioning rod at one end away from the power device is driven by the power device to enter the vacuum casting mold barrel, forming the installation end of the mold shell; a fixing piece is provided on the rod body at the installation end, and the mold shell is sleeved on the installation end of the center positioning rod through a liquid riser pipe, and is fixed and installed on the center positioning rod by the fixing piece. The center positioning rod is driven by the power of the power device to move out in the direction away from the vacuum casting mold barrel, driving the mold shell to move to the module installation position, and the center positioning rod continues to move out, driving the fixing piece to separate from the liquid riser pipe, and completing the installation of the mold shell.

[0021] The cross-sectional shape of the rod body at the mounting end of the center positioning rod of this embodiment is adapted to the cross-sectional shape of the cavity in the tube of the liquid riser. The cross-sectional shape of the rod body at the mounting end of the center positioning rod and the cross-sectional shape of the cavity in the tube of the liquid riser are circular structures, and the cross-sectional radius of the rod body at the mounting end of the center positioning rod is 1 mm smaller than the cross-sectional radius of the cavity in the tube of the liquid riser.

[0022] Furthermore, a conical chamfer is provided on the rod body at the end of the mounting end of the center positioning rod.

[0023] In addition, the fixing member of this embodiment is a guide sleeve 2; the guide sleeve 2 is a circular ring structure, and its fixing sleeve is arranged outside the rod body at the installation end. The cross-sectional size of the circular ring structure of the guide sleeve is larger than the cross-sectional size of the tube body of the liquid riser, and the liquid riser is fixedly installed on the center positioning rod by the tube body abutting against the circular ring surface of the guide sleeve.

[0024] The power device of this embodiment includes a mounting frame and a cylinder; a fixing bolt 6 is provided at the bottom of the mounting frame 7, and the mounting frame can be installed on the ground of the pit; a hollow mounting cavity is provided inside the mounting frame 7 along the frame body, and the cylinder is fixedly installed in the mounting cavity of the mounting frame through a pad 8, and its power end extends from the top of the mounting frame to form the power end of the power device, and the power end is fixedly connected to the center positioning rod through a movable top rod 9. The cylinder of this embodiment adopts a single-piston cylinder 4, the lower part of which is connected to an air intake pipe 5, and the upper part is connected to an exhaust pipe 3. The air intake pipe and the exhaust pipe are connected to the air source through an air valve to control the positioning and retraction of the single piston.

[0025] Working principle: The positioning mechanism for installing the centrifugal vacuum casting mold shell of this embodiment is installed inside the pit. The ground above the pit is paved with a steel plate, and the steel plate is provided with a center positioning rod extension hole, which does not occupy the ground space. When the positioning mechanism is in use, the centrifugal vacuum casting mold barrel is moved to the upper side of the pit by the transfer equipment, and the extension port of the riser pipe at its bottom is connected with the extension hole of the center positioning rod on the pit steel plate. First, the air intake pipe of the single piston cylinder of the positioning mechanism of this embodiment is inhaled, driving the piston to extend, driving the center positioning rod to extend from the extension hole of the center positioning rod, and then driving the installation end of the center positioning rod to enter from the extension port of the riser pipe at the bottom of the centrifugal vacuum casting mold barrel. Then the operator transfers the mold shell into the centrifugal vacuum casting mold barrel through the lifting equipment, and sets the riser pipe sleeve of the mold shell into the installation end of the center positioning rod until the riser pipe is against the guide sleeve of the installation end, thereby completing the installation of the mold shell on the center positioning rod. Then remove the lifting equipment, and then control the air valve to drive the piston of the single-piston cylinder to retract, driving the center positioning rod to move out of the centrifugal vacuum suction casting mold barrel, thereby driving the mold shell at the installation end to slowly enter the interior of the centrifugal vacuum suction casting mold barrel until part of the tube body of the riser pipe extends from the riser pipe extension port at the bottom and is stuck in the riser pipe extension port. Finally, as the center positioning rod continues to move out, the riser pipe is separated from the guide sleeve. At this time, the mold shell is stuck in the centrifugal vacuum suction casting mold barrel through the riser pipe and moves to the installation position. After the center positioning rod is completely moved out, the operator fixes the mold shell to the centrifugal vacuum suction casting mold barrel to complete the installation of the mold shell.

[0026] The implementation methods of the utility model are described in detail above in conjunction with the embodiments, but the utility model is not limited to the above-mentioned implementation methods. For ordinary technicians in this technical field, after knowing the contents recorded in the utility model, they can make several equivalent changes and substitutions thereto without departing from the principle of the utility model. These equivalent changes and substitutions should also be regarded as belonging to the protection scope of the utility model.

Claims

1. A positioning mechanism for centrifugal vacuum casting mold shell installation, comprising a central positioning rod and a power device; characterized in that: One end of the center positioning rod is connected to the power end of the power device, and the rod body of the center positioning rod at one end away from the power device is driven by the power device into the vacuum suction casting mold barrel to form the installation end of the mold shell; a fixing part is provided on the rod body of the installation end, and the mold shell is arranged on the installation end of the center positioning rod through a liquid riser tube, and is fixed to the center positioning rod by the fixing part. The center positioning rod is driven by the power of the power device to move out in the direction away from the vacuum suction casting mold barrel, driving the mold shell to move to the module installation position, and the center positioning rod continues to move out, driving the fixing part to separate from the liquid riser tube, thereby completing the installation of the mold shell.

2. A positioning mechanism for centrifugal vacuum casting mold shell installation according to claim 1, characterized in that: The cross-sectional shape of the rod body at the installation end of the central positioning rod is matched with the cross-sectional shape of the cavity in the riser tube.

3. A positioning mechanism for centrifugal vacuum casting mold shell installation according to claim 2, characterized in that: The cross section of the rod body at the installation end of the center positioning rod and the cross section of the cavity in the riser tube are circular structures, and the cross section radius of the rod body at the installation end of the center positioning rod is 1mm smaller than the cross section radius of the cavity in the riser tube.

4. A positioning mechanism for centrifugal vacuum casting mold shell installation according to claim 3, characterized in that: The rod body at the end of the mounting end of the center positioning rod is provided with a conical chamfer.

5. A positioning mechanism for centrifugal vacuum casting mold shell installation according to claim 1, characterized in that: The fixing piece is a guide sleeve; the guide sleeve is a circular ring structure, and the fixing sleeve is arranged on the outside of the rod body at the installation end.

6. A positioning mechanism for centrifugal vacuum casting mold shell installation according to claim 5, characterized in that: The cross-sectional dimension of the circular ring structure of the guide sleeve is larger than the cross-sectional dimension of the tube body of the riser, and the riser is fixedly mounted on the center positioning rod by the tube body abutting against the circular ring surface of the guide sleeve.

7. A positioning mechanism for centrifugal vacuum casting mold shell installation according to claim 1, characterized in that: The power device includes a mounting frame and a cylinder; a fixed connecting piece is provided at the bottom of the mounting frame for fixed installation of the mounting frame; a hollow mounting cavity is provided inside the mounting frame along the frame body for fixed installation of the cylinder; the power end of the cylinder extends from the top of the mounting frame to constitute the power end of the power device.

8. A positioning mechanism for centrifugal vacuum casting mold shell installation according to claim 7, characterized in that: The cylinder is a single-piston cylinder.

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