A centrifugal casting demolding mechanism

Abstract

The application discloses a demoulding mechanism for centrifugal casting, characterized in that the lower mould comprises an outer mould part and an inner mould part arranged in a split mode; the inner mould part comprises a lower mould mounting base plate and an inner mould mounted on the lower mould mounting base plate; the demoulding mechanism for automatically demoulding between the iron core and the inner mould when the lower mould and the lower mould fixing seat are reset, the demoulding mechanism comprises a floating transition plate floatingly arranged between the outer mould part and the inner mould part, a plurality of jacks with one end connected with the floating transition plate and the other end penetrating through the inner mould part and the lower mould fixing seat, and a boss arranged at one end of the jack. The application divides the lower mould into the outer mould part and the inner mould part in a split mode, so that the outer mould demoulding and the inner mould demoulding are formed during demoulding, thereby forming secondary demoulding between the iron core and the lower mould, reducing the driving force required during demoulding, avoiding the phenomenon of the iron core being roughened due to forced demoulding, solving the problem of inconvenient demoulding and ensuring the casting quality of the iron core.

Description

TECHNICAL FIELD

[0001] The application relates to a core centrifugal casting device, in particular to a demolding mechanism for centrifugal casting. BACKGROUND

[0002] In the prior art, a vacuumizing device is added to a rotor core in order to improve the centrifugal casting quality. The rotor core is vacuumized when aluminum liquid is cast, so that the air in the rotor core is completely discharged, the aluminum liquid flow speed is accelerated, and no air bubble and cavity exist in the rotor core after casting, so that the casting density and casting quality are improved.

[0003] However, in the actual processing, the air hole in the aluminum liquid is vacuumized when the vacuumizing is performed, the casting density is increased, the aluminum liquid is more closely combined with the lower mold cavity wall during casting, and the demolding of the rotor core from the lower mold is difficult by the demolding device in the existing casting device. If the driving part in the demolding device is replaced to increase the demolding force, the rotor core is damaged due to the strong pushing, the outer wall of the rotor core is roughened, and the casting quality of the rotor core is affected. Therefore, the demolding mechanism for centrifugal casting is provided. SUMMARY

[0004] The application aims to solve the above problems and provides a demolding mechanism for centrifugal casting.

[0005] In order to achieve the above purpose, the application provides the following technical scheme: a demolding mechanism for centrifugal casting, which comprises a rotating shaft, a lower mold rotating disc connected with the rotating shaft, a lower mold fixing base, and a lower mold installed on the lower mold fixing base. The lower mold comprises an outer mold part and an inner mold part arranged in a split mode. The inner mold part comprises a lower mold installation pad and an inner mold installed on the lower mold installation pad. The demolding mechanism comprises a floating transition plate floatingly arranged between the outer mold part and the inner mold part, a plurality of jacks with one end connected with the floating transition plate and the other end penetrating through the inner mold part and the lower mold fixing base, and a boss arranged at one end of the jack.

[0006] Further preferably, the upper pad limiting the action stroke of the jack is installed on the lower mold fixing base, and the spring is sleeved on the jack and located between the boss and the lower mold fixing base to push the jack downward.

[0007] Further preferably, the guide sleeve guiding the movement of the jack is installed on the lower mold fixing base.

[0008] Further preferably, the outer mold part comprises an outer mold connected with the floating transition plate and an outer mold base installed on the outer mold.

[0009] Further preferably, a lower mold rotating fan disc is installed on the lower mold mounting pad to improve heat dissipation.

[0010] Further preferably, the drying machine is a mesh belt drying machine.

[0011] Further preferably, a mold closing ejector rod is movably installed between the rotating shaft, the lower mold rotating disc, and the lower mold fixed seat, and a material core withdrawing shaft is movably installed in the mold closing ejector rod to separate the iron core from the outer mold.

[0012] The present application has the following advantages: the lower mold is divided into an outer mold part and an inner mold part, so that the outer mold part and the inner mold part are separated during demolding, thereby forming secondary demolding between the iron core and the lower mold, reducing the driving force required during demolding, avoiding the phenomenon of iron core roughening caused by strong demolding, solving the problem of inconvenient demolding, and ensuring the quality of iron core casting;

[0013] The demolding mechanism is driven by the reset force during the descent of the lower mold fixed seat and the lower mold to drive the outer mold part to act on the iron core and the inner mold during inner mold demolding, without the need for additional driving devices, thereby saving costs, improving the utilization rate of the entire device, and improving demolding efficiency and demolding quality. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a structural schematic diagram of the present application;

[0015] Figure 2 is a partial cross-sectional structural schematic diagram of the present application;

[0016] Figure 3 is a partial cross-sectional structural schematic diagram of the present application;

[0017] Figure 4 is a partial cross-sectional structural schematic diagram of the present application.

[0018] LEGEND: 1, rotating shaft; 2, lower mold rotating disc; 3, lower mold fixed seat; 4, lower mold; 5, outer mold part; 51, outer mold; 52, outer mold seat; 6, inner mold part; 61, lower mold mounting pad; 62, inner mold; 7, demolding mechanism; 71, floating transition plate; 72, ejector rod; 73, boss; 8, upper pad block; 81, spring; 83, lower pad block; 9, guide sleeve; 91, lower mold rotating fan disc; 10, mold closing ejector rod; 11, material core withdrawing shaft. DETAILED DESCRIPTION

[0019] The demolding mechanism for centrifugal casting according to the present application will be further described below in conjunction with the accompanying drawings.

[0020] It should be noted that all directionality indications in the embodiments of the present application, such as up, down, left, right, front, back, and the like, are only used to explain the relative positional relationship and movement between components in a certain specific posture, as shown in the drawings, and if the specific posture changes, the directionality indications will also change accordingly.

[0021] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixation" and the like should be understood broadly; for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; can be internal communication of two elements or interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0022] Referring to Figures 1-4 A demolding mechanism for centrifugal casting, comprising a rotating shaft 1, a lower mold rotating disc 2 connected with the rotating shaft 1, a lower mold fixed seat 3, and a lower mold 4 installed on the lower mold fixed seat 3; characterized in that the lower mold 4 comprises an outer mold part 5 and an inner mold part 6 arranged in a split manner; the inner mold part 6 comprises a lower mold installation pad plate 61 and an inner mold 62 installed on the lower mold installation pad plate 61; further comprising a demolding mechanism 7 for automatically demolding between the iron core and the inner mold 62 when the lower mold 4 and the lower mold fixed seat 3 are reset, the demolding mechanism 7 comprising a floating transition plate 71 floatingly arranged between the outer mold part 5 and the inner mold part 6, a plurality of top rods 72 having one end connected with the floating transition plate 71 and the other end penetrating through the inner mold part 6 and the lower mold fixed seat 3, and a boss 73 arranged at one end of the top rod 72;

[0023] The length of the top rod 72 is longer than the height of the sum of the lower mold installation pad plate 61 and the lower mold fixed seat 3, and is longer than the driving section, so that during the downward resetting of the lower mold fixed seat 3, the bottom of the boss 73 first contacts the lower mold rotating disc 2, and during the continuous downward movement of the lower mold fixed seat 3, the length of the driving section forms a pushing force on the floating transition plate 71 to move the floating transition plate 71 and the upper mold part upward, thereby driving the demolding between the iron core and the inner mold 62;

[0024] By arranging the lower mold 4 in a split manner into an outer mold part 5 and an inner mold part 6, the outer mold 51 and the inner mold 62 are demolded during demolding, thereby forming secondary demolding between the iron core and the lower mold 4, reducing the driving force required during demolding, and avoiding the phenomenon of iron core roughening caused by strong demolding, thereby solving the problem of inconvenient demolding while ensuring the casting quality of the iron core;

[0025] Through the setting of the demolding mechanism 7, the demolding mechanism 7 drives the outer mold part 5 to act when the lower mold fixing base 3 and the lower mold 4 are reset by the reset force during the falling, so that the inner mold 62 is demolded between the iron core and the inner mold 62, without adding an additional driving device, saving the cost, improving the utilization of the whole device, and improving the demolding efficiency and demolding quality.

[0026] In one embodiment, the upper pad 8 installed on the lower mold fixing base 3 limits the action stroke of the ejector rod 72, and the spring 81 sleeved on the ejector rod 72 and between the boss 73 and the lower mold fixing base 3 is used to push the ejector rod 72 to reset downward;

[0027] Through the setting of the upper pad 8, the stroke of the upward movement of the ejector rod 72 is limited, and overtravel is avoided; through the setting of the spring 81, the ejector rod 72 resets downward by the reset force of the spring 81 when it is not subjected to an upward force, and at the same time, the floating transition plate 71 is reset.

[0028] In one embodiment, the guide sleeve 9 installed on the lower mold fixing base 3 guides the movement of the ejector rod 72; through the setting of the guide sleeve 9, the upward and downward movement of the ejector rod 72 is guided.

[0029] In one embodiment, the lower pad 83 installed on the lower mold rotating disc 2 is used to contact the boss 73 and support the boss 73.

[0030] In one embodiment, the outer mold part 5 comprises the outer mold 51 connected with the floating transition plate 71 and the outer mold seat 52 installed on the outer mold 51; the outer mold 51 and the outer mold seat 52 are synchronously actuated during the action of the floating transition plate 71.

[0031] In one embodiment, the lower mold rotating fan disc 91 installed on the lower mold mounting pad 61 is used to improve the heat dissipation effect.

[0032] In one embodiment, the mold closing ejector rod 10 movably installed between the rotating shaft 1, the lower mold rotating disc 2 and the lower mold fixing base 3 and the material core withdrawing shaft 11 movably installed in the mold closing ejector rod 10 are used for demolding between the iron core and the outer mold part 5; through the setting of the material core withdrawing shaft 11, the iron core is pushed to act upward to demold between the iron core and the outer mold 51, and secondary demolding is realized.

[0033] In use, the rotating shaft 1 in the application is connected with a device for driving the rotating shaft 1 to rotate in the centrifugal casting equipment, the mold closing ejector rod 10 is connected with a driver for driving the mold closing ejector rod 10 to act upward and downward, and the material core withdrawing shaft 11 is also connected with a driver for driving the material core withdrawing shaft 11 to act upward and downward, and the driver can be a pneumatic cylinder or a servo device.

[0034] When the rotor core is finished by centrifugal casting, the mold closing ejector rod 10 is driven to move downward and reset by the driver, the mold closing ejector rod 10 drives the lower mold fixing base 3, the lower mold 4 and the core to move downward, in the process of moving downward, the boss 73 of the ejector rod 72 first contacts the lower pad 83, and the lower pad 83 supports the ejector rod 72, in the process of continuously moving downward of the lower mold fixing base 3, the floating transition plate 71 is pushed by the ejector rod 72, the floating transition plate 71 applies the pushing force to the outer mold 51, the core and the outer mold base 52, at the same time, the lower mold fixing base 3 drives the lower mold mounting pad 61 and the lower mold 4 to apply downward force, under the action of the two forces in opposite directions, the core is separated from the inner mold 62, and automatic demolding is realized; after the lower mold fixing base 3 moves to the position, the material withdrawing shaft 11 is driven to move upward by the control driver, the core is pushed upward by the material withdrawing shaft 11 to separate from the outer mold 51, and secondary demolding is realized, after twice demolding, the core is completely demolded.

[0035] The protection scope of the present application is not limited to the above embodiments and their transformations. The routine modifications and replacements made by the skilled in the art based on the content of the embodiments all belong to the protection scope of the present application.

Claims

1. A centrifugal casting demolding mechanism, comprising a rotating shaft (1), a lower mold rotating disc (2) connected with the rotating shaft (1), a lower mold fixing base (3), and a lower mold (4) installed on the lower mold fixing base (3); characterized in that The lower mold (4) comprises an outer mold part (5) and an inner mold part (6) which are arranged in a split mode so that the outer mold part (5) and the inner mold part (6) are demoulded separately when demoulding, thereby forming secondary demoulding between the iron core and the lower mold; the inner mold part (6) comprises a lower mold mounting base plate (61) and an inner mold (62) mounted on the lower mold mounting base plate (61); further comprising a demoulding mechanism (7) which automatically demoulds between the iron core and the inner mold (62) without adding additional driving devices when the lower mold (4) and the lower mold fixing seat (3) are reset, the demoulding mechanism (7) comprises a floating transition plate (71) which is arranged between the outer mold part (5) and the inner mold part (6), a plurality of top rods (72) which are connected to the floating transition plate (71) at one end and pass through the inner mold part (6) and the lower mold fixing seat (3) at the other end, and a boss (73) arranged at one end of the top rod (72).

2. A demoulding mechanism for centrifugal casting according to claim 1, characterized in that: Further comprising an upper pad block (8) mounted on the lower mold fixing seat (3) to limit the action stroke of the top rod (72), and a spring (81) sleeved on the top rod (72) and located between the boss (73) and the lower mold fixing seat (3) for pushing the top rod (72) to reset downward.

3. A demolding mechanism for centrifugal casting according to claim 2, characterized in that: Further comprising a guide sleeve (9) mounted on the lower mold fixing seat (3) to guide the movement of the top rod (72).

4. The demolding mechanism for centrifugal casting according to claim 1, characterized in that: Further comprising a lower pad block (83) mounted on the lower mold rotating disc (2).

5. The demolding mechanism for centrifugal casting according to claim 1, characterized in that: The outer mold part (5) comprises an outer mold (51) connected to the floating transition plate (71) and an outer mold seat (52) mounted on the outer mold (51).

6. A demolding mechanism for centrifugal casting according to claim 1, characterized in that: Further comprising a lower mold rotating fan blade disc (91) mounted on the lower mold mounting base plate (61) for improving the heat dissipation effect.

7. The demolding mechanism for centrifugal casting according to claim 1, characterized in that: Further comprising a mold closing top rod (10) movably mounted between the rotating shaft (1), the lower mold rotating disc (2) and the lower mold fixing seat (3), and a material core shaft (11) movably mounted in the mold closing top rod (10) for demoulding between the iron core and the outer mold part (5) to realize secondary demoulding.

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