Lost foam sand box for casting motor shell
By using an annular cover plate and airbags to enhance airtightness in the lost foam sand box and using an eccentric motor vibrating bar to ensure a vacuum environment, the problem of insufficient airtightness of the thin film covering was solved, thus improving casting efficiency and pouring accuracy.
Patent Information
- Application Number
- CN202520004546.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-02
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2035-01-02
AI Technical Summary
The existing lost foam casting sand box has insufficient airtightness during the film covering process, which makes it impossible to maintain a vacuum environment inside the box after the evacuation operation. This affects the release of gas after the model is vaporized, and reduces casting efficiency and accuracy.
By setting an annular cover plate and an annular airbag, the airtightness between the membrane and the annular groove is enhanced. Combined with multiple air chambers and an eccentric motor vibrating rod, the membrane is ensured to be tightly bonded to the casting sand, forming a vacuum environment and preventing gas leakage.
It improves the airtightness and efficiency of the casting process, ensures model stability and pouring accuracy, and avoids gas leakage affecting casting quality.
Smart Images
Figure CN223684402U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to motor manufacturing equipment technical field especially relates to a motor shell casting is with lost foam sand box. BACKGROUND
[0002] Motor, commonly known as motor, refers to the electromagnetic device that realizes the conversion or transmission of electric energy according to electromagnetic induction law, divides into motor and generator, motor is widely used in various control systems, can convert the mechanical output of motor shaft into the voltage signal of input, drags the controlled element, thereby reaches the control purpose, motor is composed of stator, rotor, shell and other accessories, wherein the shell can provide the protection function for other elements, guarantees the normal operation of motor, when producing motor shell, needs to use lost foam sand box casting technology to make the shell integral molding, to improve the shell strength.
[0003] In the prior art, when using the lost foam sand box casting technology, the sand soil needs to be covered with a film after the model is submerged, which facilitates the subsequent air extraction operation to form a vacuum environment between the sand soils, but when fixing the film, only a layer of sand soil is added on the upper part of the film, so that the air tightness between the film and the sand soil cannot be guaranteed, and the insufficient air tightness will cause the internal part of the box to not maintain a vacuum environment after the air extraction operation, which is not conducive to the rapid release of the gas after the model gasification into the casting sand soil, therefore, in order to solve the above problems, the utility model provides a lost foam sand box for motor shell casting. UTILITY MODEL CONTENTS
[0004] In view of the defects of the prior art, the utility model provides a lost foam sand box for motor shell casting, which is convenient to fix the covering film by setting the annular cover plate, and the film and the annular groove two are tightly fitted by using the annular air bag inflation and the annular groove two clamping, so that the air tightness of the film after laying is enhanced, the air extraction and pressure reduction are facilitated, the air tightness deficiency causes the box to not maintain a vacuum state, the gas after the model gasification cannot be rapidly released into the casting sand soil, so that the device maintains good working efficiency.
[0005] The utility model provides following technical scheme: A kind of lost foam sand box for motor shell casting, including box, annular groove one is set in the top of box inner chamber, annular groove two is set in the bottom of annular groove one, annular cover plate is movably connected in the upper portion of annular groove one by shaft, air hole is set in the annular cover plate, air pump is fixedly installed on the upper portion of box, air pipe is fixedly installed in the front portion of air pump, the other end of air pipe is fixedly connected with the top end of air hole, annular bead strip is fixedly installed in the bottom of annular cover plate, annular bead strip is in accord with annular groove two, the inner chamber of annular bead strip is fixedly connected with the bottom end of air hole, annular air bag is fixedly installed in the bottom of annular bead strip, annular air bag is clamped with annular groove two, it is convenient to fix covering film by setting annular cover plate, using annular air bag expansion and clamping with annular groove two, so that film and annular groove two are closely attached, the air tightness after film laying is strengthened, it is favorable for box to maintain vacuum state, so that device maintains good working efficiency.
[0006] Preferably, annular air duct is set in the box, air extraction pipe is fixedly installed on the left portion of the box, the air extraction pipe is fixedly connected with the annular air duct, air cavity is uniformly set in the box and on the side of its inner chamber, the number of air cavity is ten, air is extracted by air extraction pipe, so that the excess air in the inner chamber of the box enters the air cavity, and then is extracted by the annular air duct, the operation rate of the air extraction device is improved by setting multiple air cavities.
[0007] Preferably, fixed box is fixedly installed at the connection between the air cavity and the inner chamber of the box, filter screen is fixedly installed in the middle of the inner chamber of the fixed box, air extraction nozzle is uniformly fixedly installed on the side of the inner chamber of the fixed box, facing the air cavity, the filter screen is set to prevent casting sand from entering the air pipe during air extraction, so as to avoid pipe blockage and affect air extraction efficiency, and the design of multiple air extraction nozzles enables the four faces of the inner chamber of the box to be uniformly vacuumized.
[0008] Preferably, cavity is set in the box and directly below the inner chamber of the box, the number of cavities is four and symmetrically and uniformly distributed, eccentric motor is fixedly installed in the cavity, eccentric motor output shaft is movably sleeved on the bottom of the inner chamber of the box, vibration rod is fixedly installed on the eccentric motor output shaft, when casting sand submerges the model, the vibration rod is driven by the eccentric motor to vibrate the casting sand and move the casting sand to fill the gaps of the model.
[0009] Preferably, the number of the vibrating rods is four and evenly distributed in the inner cavity of the box body, the connecting plates are evenly fixed on the vibrating rods, the number of the connecting plates is four, and the notches are evenly arranged on the connecting plates, and the number of the notches is four.
[0010] Compared with the prior art, the utility model has the following effects:
[0011] 1、When need to cover the film, open annular cover plate and put the film edge into annular groove two, close annular cover plate and make annular ridge and annular groove two fit, start air pump and inflate annular air bag, make annular air bag expand and be connected with annular groove two, fix the film edge in annular groove two, utilize the extensibility of air bag and be favorable to the film and annular groove two closely, enhance the air tightness after film laying, convenient subsequent air extraction and pressure reduction operation of box body, avoid the insufficient air tightness and lead to the vacuum state in the pouring box body, prevent the gas after model gasification and not quickly release into casting sand, make the device maintain good work efficiency.
[0012] 2、After casting sand covers casting model, eccentric motor drives vibrating rod to vibrate in the inner cavity of the box body, drive casting sand to move and fill the gap of model, avoid the existence of big gap between sand and model and influence the precision of pouring piece, set up multiple connecting plates on vibrating rod and multiple notches on connecting plate, be favorable to increase the contact area of vibrating mechanism and casting sand, make the homogeneous distribution of casting sand around casting model, prevent the uneven distribution of casting sand and make the position of model deviate in the pouring process, improve the stability of model in pouring. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 It is the schematic diagram of the structure of the utility model;
[0014] Figure 2 It is the schematic diagram of the structure when the ring cover plate is opened;
[0015] Figure 3 It is the schematic diagram of the structure of the utility model;
[0016] Figure 4 It is the schematic diagram of the sealing structure of the utility model;
[0017] Figure 5 It is the schematic diagram of the air extraction structure of the utility model;
[0018] Figure 6 It is the schematic diagram of the vibrating rod structure of the utility model.
[0019] In the figure: 1, box; 2, annular groove one; 3, annular groove two; 4, annular cover plate; 5, air hole; 6, air pump; 7, air pipe; 8, annular rib; 9, annular air bag; 10, annular air duct; 11, air suction pipe; 12, air cavity; 13, fixed box; 14, filter screen; 15, air suction nozzle; 16, cavity; 17, eccentric motor; 18, vibrating rod; 19, connecting plate; 20, slot. DETAILED DESCRIPTION
[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0021] Please refer to Figures 1-6 A lost foam sand box for casting motor shell, comprising a box body 1, an annular groove one 2 is formed in the top of the inner cavity of the box body 1, an annular groove two 3 is formed in the bottom of the annular groove one 2, an annular cover plate 4 is movably connected to the upper part of the annular groove one 2 through a shaft, an air hole 5 is formed in the annular cover plate 4, an air pump 6 is fixedly installed on the upper part of the box body 1, an air pipe 7 is fixedly installed on the front part of the air pump 6, the other end of the air pipe 7 is fixedly connected with the top end of the air hole 5, an annular rib 8 is fixedly installed on the bottom of the annular cover plate 4, the annular rib 8 is matched with the annular groove two 3, the inner cavity of the annular rib 8 is fixedly connected with the bottom end of the air hole 5, an annular air bag 9 is fixedly installed on the bottom of the annular rib 8, the annular air bag 9 is clamped with the annular groove two 3, when the film needs to be covered, the annular cover plate 4 is opened to cover the film on the casting sand, and the edge of the film is inserted into the annular groove two 3, the annular cover plate 4 is closed to make the annular rib 8 matched with the annular groove two 3, the air pump 6 is started to inflate the annular air bag 9 through the air pipe 7 and the air hole 5 connected with the annular rib 8, so that the annular air bag 9 is inflated and clamped with the annular groove two 3, thereby the edge of the film is fixed in the annular groove two 3, the extension of the air bag 9 is beneficial to the film closely adhering to the annular groove two 3, the air tightness after the film is laid is enhanced, the subsequent air suction and pressure reduction operation of the box body 1 is facilitated, the casting box 1 cannot reach the vacuum state due to the insufficient air tightness is avoided, the gas after the model is gasified cannot be quickly released into the casting sand, the device maintains good working efficiency;
[0022] The annular air passage 10 is arranged in the box body 1, the suction pipe 11 is fixedly arranged on the left part of the box body 1, the suction pipe 11 is fixedly connected with the annular air passage 10, the air cavities 12 are evenly arranged on the side of the inner cavity of the box body 1, the number of the air cavities 12 is ten, the fixed boxes 13 are fixedly arranged at the connecting positions between the air cavities 12 and the inner cavity of the box body 1, the filter screens 14 are fixedly arranged in the middle part of the inner cavities of the fixed boxes 13, the suction nozzles 15 are evenly fixedly arranged on the side of the inner cavities of the fixed boxes 13, which faces the air cavities 12, the air in the inner cavity of the box body 1 is sucked into the air cavities 12 through the filter screens 14 and the suction nozzles 15, and then is sucked away by the suction pipe 11 through the annular air passage 10, so that the vacuum environment is formed between the casting sand and the film, the cavities 16 are arranged below the inner cavity of the box body 1, the number of the cavities 16 is four and they are symmetrically and evenly distributed, the eccentric motors 17 are fixedly arranged in the cavities 16, the output shafts of the eccentric motors 17 are movably sleeved on the bottom of the inner cavity of the box body 1, the vibration rods 18 are fixedly arranged on the output shafts of the eccentric motors 17, the number of the vibration rods 18 is four and they are evenly distributed in the inner cavity of the box body 1, the connecting plates 19 are fixedly arranged on the vibration rods 18, the number of the connecting plates 19 is four, the notches 20 are evenly arranged on the connecting plates 19, the number of the notches 20 is four, the eccentric motors 17 are started, the output shafts of the eccentric motors 17 drive the vibration rods 18 to vibrate in the inner cavity of the box body 1, and drive the casting sand to move and fill the gaps of the model, so that the large gaps between the sand and the model are avoided, the precision of the pouring part is ensured, the connecting plates 19 are arranged on the vibration rods 18, and the notches 20 are arranged on the connecting plates 19, so that the contact area between the vibration mechanism and the casting sand is increased, the casting sand is evenly distributed around the casting model, the casting sand is prevented from being unevenly distributed to cause the position of the model to be deviated in the pouring process, and the stability of the model in the pouring process is improved.
[0023] Working principle: first in the box 1 laid a certain amount of casting sand, then the casting model into the box 1 inner cavity, then the box 1 inner cavity laid casting sand until the whole model is submerged, complete the eccentric motor 17, eccentric motor 17 output shaft driven vibration rod 18 in the box 1 inner cavity vibration, driven casting sand movement fill the gap of the model, open the ring cover 4 will be covered in the casting sand film, and the film edge into the ring groove two 3, close the ring cover 4 so that the ring rib 8 and ring groove two 3 with the contract, start the air pump 6 and through the air pipe 7 and air hole 5 with the connection of the ring rib 8 on the ring air bag 9 inflation, so that the ring air bag 9 inflation with ring groove two 3 card joint, so that the film edge fixed in the ring groove two 3, again through the exhaust pipe 11 for pumping, so that the box 1 inner cavity of the excess air through the filter 14 and suction nozzle 15 into the air cavity 12 is absorbed, through the ring airway 10 connection is sucked by the exhaust pipe 11, in turn, so that the casting sand and film between the formation of vacuum environment, then again in the film on the upper layer of casting sand, finally through the model on the exposed pouring mouth for pouring.
Claims
1. An expendable mold sand box for casting of an electric machine housing, comprising a box body (1), characterized in that: The inner cavity of the box (1) is provided with an annular groove one (2) at the top, the bottom of the annular groove one (2) is provided with an annular groove two (3), the upper part of the annular groove one (2) is movably connected with an annular cover plate (4) through a shaft, the annular cover plate (4) is provided with a vent hole (5), the upper part of the box (1) is fixedly installed with a gas pump (6), the front of the gas pump (6) is fixedly installed with a vent pipe (7), the other end of the vent pipe (7) is fixedly connected with the top end of the vent hole (5), the bottom of the annular cover plate (4) is fixedly installed with an annular bead (8), the annular bead (8) is matched with the annular groove two (3), the inner cavity of the annular bead (8) is fixedly connected with the bottom end of the vent hole (5), the bottom of the annular bead (8) is fixedly installed with an annular air bag (9), the annular air bag (9) is clamped with the annular groove two (3).
2. A lost foam sand box for casting motor housings according to claim 1, wherein: The box (1) is provided with an annular air duct (10), the left part of the box (1) is fixedly installed with a suction pipe (11), the suction pipe (11) is fixedly connected with the annular air duct (10), the box (1) is uniformly provided with a gas cavity (12) on the side of the inner cavity, and the number of the gas cavities (12) is ten.
3. A lost foam sand box for casting motor housings according to claim 2, wherein: The gas cavity (12) is fixedly installed with a fixed box (13) at the connection with the inner cavity of the box (1), the inner cavity of the fixed box (13) is fixedly installed with a filter screen (14), and the side of the inner cavity of the fixed box (13) facing the gas cavity (12) is uniformly fixedly installed with a suction nozzle (15).
4. A lost foam sand box for casting motor housings according to claim 1, wherein: The box (1) is provided with a cavity (16) below the inner cavity, the number of the cavities (16) is four and is symmetrically and uniformly distributed, the cavity (16) is fixedly installed with an eccentric motor (17), the output shaft of the eccentric motor (17) is movably sleeved at the bottom of the inner cavity of the box (1), and the output shaft of the eccentric motor (17) is fixedly installed with a vibrating rod (18).
5. A lost foam sand box for casting motor housings according to claim 4 wherein: The number of the vibrating rods (18) is four and is uniformly distributed in the inner cavity of the box (1), the vibrating rods (18) are uniformly fixedly installed with a connecting plate (19), the number of the connecting plates (19) is four, the connecting plates (19) are uniformly provided with a notch (20), and the number of the notches (20) is four.