A draw system for accelerating draw efficiency

Abstract

The application relates to the technical field of sand mold stripping, and discloses a stripping system capable of accelerating stripping efficiency, which comprises a rack, stripping arms, a stripping station located below the stripping arms and a controller, the stripping arms are slidingly connected to the rack, a first driving device for driving the stripping arms to lift is arranged on the stripping arms, a first clamping piece is oppositely arranged on the power output end of the stripping arms, and the first clamping piece is used for clamping a sand box; the stripping station is provided with a proximity switch, a displacement sensor and a vibrator, the proximity switch, the displacement sensor, the vibrator and the first driving device are electrically connected with the controller; the stripping station is also provided with a second clamping piece which is used for clamping a stripping bottom plate entering the stripping station. According to the scheme, stripping can be realized without multiple overturning, the stripping process is greatly shortened, the stripping time is saved, and the stripping efficiency is remarkably improved.

Description

[0001] This application is a divisional application of Chinese Patent Application No. 202210601601.2 "A MOLD DRAWING SYSTEM AND CONTROL METHOD", filed on May 30, 2022. TECHNICAL FIELD

[0002] The present application relates to the technical field of sand mold drawing, in particular to a mold drawing system for accelerating mold drawing efficiency. BACKGROUND

[0003] With the continuous development of digital science and technology, intelligent manufacturing technology gradually transforms from high-end industries to traditional manufacturing industries. Subdividing the molding process, gradually realizing the automation of the molding process, and further integrating various automated processes through reasonable layout, system compatibility, and seamless process connection are an important way to realize molding automation or even intelligentization. Sand casting includes sand box mold preparation, sand mixing, sand filling molding, static hardening, sand mold separation, paint brushing, oven, and box closing processes. Among them, the sand mold separation process, also known as the mold drawing process, is to separate the sand mold from the mold after the sand mold is completely hardened, and then obtain the sand. The equipment commonly used to separate the sand mold from the mold is a turnover mold drawing machine. However, the turnover mold drawing machine needs to drive the mold and the sand mold as a whole to turn over multiple times during use, which consumes a lot of energy and takes a long time to turn over and draw the mold multiple times, thereby reducing the mold drawing efficiency. At the same time, the turnover mold drawing machine needs to knock the mold drawing bottom plate during the mold drawing process. In order to ensure the success rate of mold drawing, a large force is often used to knock the mold drawing bottom plate, which may affect the quality of the sand mold after mold drawing, thereby reducing the molding efficiency. Therefore, it is necessary to develop a stable mold drawing system and control method to improve the mold drawing efficiency while ensuring the quality of the sand mold, thereby improving the molding efficiency. SUMMARY

[0004] The present application aims to provide a mold drawing system and control method to solve the technical problem of low mold drawing efficiency in the prior art.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solution: a mold drawing system, comprising a rack, a mold drawing double arm, a mold drawing station located below the mold drawing double arm, and a controller, the mold drawing double arm is slidingly connected to the rack, a first driving device for driving the mold drawing double arm to lift is arranged on the mold drawing double arm, a first clamping piece is oppositely arranged on the power output end of the mold drawing double arm, and the first clamping piece is used for clamping a sand box;

[0006] The mold drawing station is provided with a proximity switch, a displacement sensor, and a vibrator, and the proximity switch, the displacement sensor, the vibrator, and the first driving device are electrically connected to the controller;

[0007] The mold drawing station is also provided with a second clamping piece for clamping the mold drawing bottom plate entering the mold drawing station.

[0008] The principle of the scheme is:

[0009] When the stripping base plate and the sand box are transported to the stripping position together, the proximity switch detects the arrival signal of the stripping base plate and transmits it to the controller. When the controller receives the arrival signal, it controls the first driving device and the first clamping member to start. The first driving device drives the stripping double arm to move up to the position of the sand box, and then the first clamping member is controlled to extend and retract to clamp the sand box. Then the controller controls the first driving device to start again, drives the stripping double arm to lift the sand box, and in the process, the displacement sensor detects the displacement of the sand box and forms a displacement signal, which is then transmitted to the controller. The controller analyzes the displacement signal, and when the displacement signal value is greater than or equal to the preset stripping displacement, it is determined that the stripping is successful; otherwise, it is determined that the stripping fails, and the controller controls the vibrator to start according to the stripping failure signal, which vibrates the stripping base plate to help the sand box and the stripping base plate separate. Then the controller controls the first driving device to start to continuously control the stripping double arm to lift the sand box, thereby completing the stripping.

[0010] The advantages of the scheme are:

[0011] 1. Compared with the existing turnover stripping machine which needs to be turned over multiple times to strip, the present scheme accurately identifies the position of the stripping base plate, then the stripping double arm clamps the sand box and drives it to move upwards, so that the sand box and the stripping base plate are separated, thereby completing the stripping. The present scheme can realize stripping without multiple turns, greatly shortening the stripping process and saving stripping time, thereby significantly improving the stripping efficiency.

[0012] 2. Compared with the existing turnover stripping machine which knocks the stripping base plate during stripping, causing damage to the sand mold, the present scheme does not need to turn over during the entire stripping process, and the sand box and the sand mold in the sand box are always in an upright state and will not be damaged due to repeated turning. At the same time, the present scheme can realize stripping by controlling the stripping double arm to clamp the sand box and drive it to move upwards, without knocking the stripping base plate hard to cause damage to the sand mold, thereby reducing the molding efficiency.

[0013] 3. The present scheme sets a stripping state signal. When the stripping is successful, it shows that the stripping is successful, and the system continues the subsequent process. When the stripping fails, it shows that the stripping fails, and the system starts the vibrator to vibrate and assist the sand box and the stripping base plate to separate to complete the stripping. The present scheme provides real-time feedback on the stripping process, allowing the operator to observe the stripping process and status remotely, making it easier to operate. At the same time, the vibrator is set to slightly vibrate the equipment that fails to strip to assist the stripping, protect the quality of the sand mold, and improve the molding efficiency.

[0014] Preferably, the frame is provided with guide rails, the mold stripping double arms are provided with pulleys that can slide on the guide rails, and the frame is provided with a third driving mechanism that drives the mold stripping double arms to slide along the frame. With the above scheme, the mold stripping double arms can be conveniently driven to slide on the frame to adapt to different positions of the sand box during demolding.

[0015] Preferably, the sand box is provided with clamping grooves on both sides for the first clamping members to be inserted, the power output end of the first clamping member is connected with a clamping pin shaft, and the clamping pin shaft and the power output end of the first clamping member are provided with a second driving device that drives the clamping pin shaft to flip. With the above scheme, the clamping members are inserted into the clamping grooves to further assist the first clamping members to stably clamp the sand box, thereby improving the mold stripping efficiency; the second driving device drives the clamping pin shaft to drive the sand box to flip and then put down the sand box after successful mold stripping.

[0016] Preferably, the mold stripping station comprises a plurality of transmission rollers that are rotationally connected to the frame, the end portions of the transmission rollers are coaxially connected with transmission gears, and the transmission gears are connected with a transmission chain. With the above scheme, the mold stripping base plate and the sand box can be conveniently conveyed in the mold stripping station, and when the contact switch receives a mold stripping base plate in-place signal, the in-place signal is transmitted to the controller, at which time the controller controls the transmission rollers to stop conveying, so that the mold stripping base plate stays at a specified mold stripping position.

[0017] Preferably, the mold stripping station is further provided with grating sensors, and the grating sensors are located on the frame that fixes the transmission rollers and are electrically connected with the controller. With the above scheme, the grating sensors are used to detect the height of the sand box and form a height signal, and then the height signal is transmitted to the controller, the controller matches the height signal with the sand box height and the code in the controller, confirms the sand box code, and then controls the mold stripping double arms to start when the sand box in-place signal is received, specifically controls the sliding stroke, lifting stroke, and clamping stroke of the mold stripping double arms, thereby controlling the mold stripping.

[0018] Preferably, the controller records the code of the sand box, the code corresponds to the mold stripping double arms working information, and the mold stripping double arms working information comprises the lifting stroke and the clamping stroke of the mold stripping double arms. With the above scheme, after the grating sensors collect the height of the sand box, the lifting distance of the mold stripping double arms is determined according to the comparison between the sand box height and the sand box code, so that the first clamping members are inserted into the clamping grooves to clamp the sand box.

[0019] Preferably, the clamping grooves are located in the middle of the sand box, and the distance between the clamping grooves and the mold stripping base plate is not less than 150 mm. With the above scheme, after the grating sensors collect the height of the sand box, the position of the clamping grooves is calculated according to the sand box height, thereby determining the lifting distance of the mold stripping double arms, so that the first clamping members are inserted into the clamping grooves to clamp the sand box.

[0020] Preferably, the rack is provided with an alarm, and the alarm is electrically connected with the controller. By using the above scheme, when the vibrator fails to assist the sand box and the mold base plate to separate after starting multiple times, the controller controls the alarm to start, so as to inform the operator to handle in time, and avoid the equipment jam to affect the production efficiency.

[0021] A control method of a mold stripping system, comprising the following steps:

[0022] S1: the height of the sand box and the mold stripping double-arm working information are coded and then correspondingly input into the controller, and then the mold base plate and the sand box are transported to the mold stripping station;

[0023] S2: the contact switch confirms that the mold base plate reaches the specified position of the mold stripping, the grating sensor detects the height of the sand box and forms a height signal, and then the signal is transmitted to the controller, and the controller confirms the mold stripping double-arm working information after matching the coding;

[0024] S3: the controller controls the mold stripping double-arm to rise;

[0025] S4: the displacement sensor detects the displacement amount of the sand box and forms a displacement signal, and then the displacement signal is transmitted to the controller, and the controller controls the vibrator to start according to the displacement signal;

[0026] S5: after the mold stripping succeeds, the controller controls the mold stripping double-arm to drive the sand box to rise and transport to the specified position.

[0027] The principle and advantages of the scheme are:

[0028] 1: the size information of different sand boxes and the mold stripping double-arm working information are coded and correspondingly matched, so that the system can quickly identify the sand box information of the mold stripping and automatically strip the mold, effectively save the identification reaction time, improve the mold stripping efficiency, and thus improve the molding production efficiency.

[0029] 2: the displacement sensor and the vibrator are used in cooperation to assist the vertical mold stripping, that is, when the direct mold stripping fails, the displacement sensor detects the displacement amount of the sand box and forms a displacement signal, and then the displacement signal is transmitted to the controller, the controller analyzes and compares the displacement signal, when the displacement signal is less than the theoretical displacement amount, the controller controls the vibrator to vibrate slightly, assists the sand box and the mold base plate to separate to realize the mold stripping, when the displacement signal is greater than or equal to the theoretical displacement amount, the controller determines that the sand box stripping succeeds, and the controller controls the mold stripping double-arm to drive the sand box to rise and transport to the specified position. The scheme does not need to knock the sand box and the mold base plate, effectively avoids the need to knock the bottom of the overturned mold base plate every time when the existing technology uses the overturning mold stripping machine to strip the mold, so as to make the sand mold loose or even collapse and affect the sand mold quality.

[0030] Preferably, in S3, the distance of the mold lifting double arms rising is 10mm. With the above scheme, the displacement sensor can quickly detect the displacement of the sand box, so that the controller can quickly judge the mold lifting state and start the subsequent processing scheme. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a front view of the system in embodiment 1 of the present application.

[0032] Figure 2 is a top view of the system in embodiment 1 of the present application.

[0033] Figure 3 is a front view of the system in embodiment 1 of the present application. Figure 2 is an enlarged view of A2 in the middle.

[0034] Figure 4 is a flow chart of the control method in embodiment 1 of the present application.

[0035] Figure 5 is a front view of the whole in embodiment 2 of the present application. DETAILED DESCRIPTION

[0036] The following will be further described in detail through specific embodiments:

[0037] The reference signs in the drawings of the specification include: rack 1, guide rail 2, mold lifting double arms 3, roller 31, lifting cylinder 32, clamping cylinder 33, clamping pin shaft 331, overturning motor 34, conveying roller 411, conveying gear 412, conveying chain 413, grating sensor 42, proximity switch 43, end head cylinder 44, displacement sensor 45, vibrator 46, sand box 5, clamping groove 51, mold lifting bottom plate 6, alarm 7.

[0038] Embodiment 1

[0039] This embodiment is basically as shown in Figure 1 , Figure 2 and Figure 3 : a mold lifting system, comprising a rack 1, a controller (not shown in the figure) and mold lifting double arms 3 located on the rack 1, and a mold lifting station located below the mold lifting double arms 3, the mold lifting double arms 3 are slidingly connected to the rack 1, and in this embodiment, the rack 1 is provided with a guide rail 2, and the mold lifting double arms 3 are provided with rollers 31 that can slide on the guide rail 2, the rollers 31 are driven by a rolling motor, and the rolling motor is electrically connected to the controller, so that the controller can control the rolling motor to drive the rollers 31 to roll along the guide rail 2, thereby driving the mold lifting double arms 3 to slide along the guide rail 2; in this embodiment, the controller is a PLC controller, and the PLC controller has different sand box sizes and corresponding mold lifting double arms 3 working information recorded in the code, including the sliding stroke, the lifting stroke, and the clamping stroke of the mold lifting double arms.

[0040] The first driving device is arranged on the ejection double arm 3 to drive the ejection double arm 3 to lift, and in this embodiment, the first driving device is a lifting cylinder 32, which is electrically connected with the PLC controller, so that the PLC controller can drive the ejection double arm 3 to lift by controlling the lifting cylinder 32 to start; a first clamping piece is arranged opposite to the power output end of the ejection double arm 3, and the first clamping piece is used to clamp the sand box 5; the sand box 5 is provided with clamping grooves 51 on both sides for inserting the clamping pin shaft 331, and the clamping grooves 51 are located in the middle of the sand box 5, and the distance between the clamping grooves 51 and the ejection base plate 6 is not less than 150 mm; in this embodiment, the first clamping piece is a clamping cylinder 33, and the power output end of the clamping cylinder 33 is connected with the clamping pin shaft 331, which is inserted into the clamping groove 51, so as to further assist the clamping pin shaft 331 to stably clamp the sand box 5, and the sand box 5 and the ejection base plate 6 are separated during ejection, so as to improve the ejection efficiency; the second driving device is arranged between the clamping pin shaft 331 and the power output end of the clamping cylinder 33 to drive the clamping pin shaft 331 to overturn, and in this embodiment, the second driving device is a overturning motor 34, which drives the clamping pin shaft 331 to make overturning movement, so as to drive the sand box 5 to overturn and put down the sand box 5 after the ejection is successful.

[0041] The ejection station comprises a plurality of transmission rollers 411 rotatably connected to the frame 1, the end portions of the transmission rollers 411 are coaxially connected with transmission gears 412, the transmission gears 412 are connected with a transmission chain 413, the transmission chain 413 is driven by a transmission motor (not shown in the figure), and the transmission motor is electrically connected with the PLC controller; the ejection station is also provided with a grating sensor 42, a proximity switch 43, a second clamping piece, a displacement sensor 45 and a vibrator 46, and the grating sensor 42, the proximity switch 43, the second clamping piece, the displacement sensor 45 and the vibrator 46 are electrically connected with the PLC controller (the PLC controller, the grating sensor 42, the proximity switch 43 and the displacement sensor 45 are prior art, and the model can be selected according to actual needs).

[0042] In this embodiment, the second clamping piece is an end head cylinder 44 fixed on the frame 1 at both ends of the transmission roller 411, and the end head cylinder 44 is mainly used to clamp the ejection base plate 6, so as to avoid the displacement of the ejection base plate 6 during the ejection process, thereby affecting the ejection process and efficiency;

[0043] The grating sensor 42 is arranged on the frame 1 to detect the height of the sand box 5 and form a height signal, and then the height signal is transmitted to the PLC controller; the PLC controller matches the received sand box height signal with the sand box 5 height signal and code recorded in the PLC controller in advance, confirms the sand box 5 code, and controls the ejection double arm 3 to start after receiving the sand box 5 in-place signal, specifically controls the sliding stroke, lifting stroke, clamping stroke and the like of the ejection double arm 3, so as to control the ejection.

[0044] The vibrator 46 and the proximity switch 43 are located between two adjacent conveying rollers 411, the vibrator 46 is used to vibrate the mold base plate 6 conveyed to the conveying roller 411, to assist the mold base plate 6 to separate from the sand box 5; after the mold base plate 6 contacts the proximity switch 43, the PLC controller controls the lifting cylinder 32 to start according to the signal of the proximity switch 43, the lifting cylinder 32 drives the mold double arm 3 to move upward to start the mold and controls the mold double arm 3 to rise by 10mm;

[0045] The displacement sensor 45 is located on the rack 1 at both ends of the fixed conveying roller 411, which is mainly used to detect the displacement of the sand box 5 and form a displacement signal, and then transmit the displacement signal to the PLC controller, and the PLC controller controls the vibrator 46 to start according to the comparison result of the actual displacement signal and the preset theoretical displacement amount of the sand box; Specifically, the theoretical displacement amount of the sand box 5 is the rising amount of the mold double arm, which is specifically 10mm in this embodiment, that is, the preset mold displacement is 10mm; When the displacement signal value of the sand box 5 is less than 10mm, the PLC controller determines that the mold fails by comparison, and the PLC controller controls the vibrator 46 to start, and the vibrator 46 drives the mold base plate 6 to vibrate, thereby speeding up the separation of the mold base plate 6 and the sand box 5; When the displacement signal of the sand box 5 received by the PLC controller is greater than or equal to 10mm, the PLC controller determines that the mold is successful by comparison, and then the PLC controller controls the mold double arm 3 to continue to complete the subsequent steps of the mold; The subsequent steps of the mold are specifically that the PLC controller controls the mold double arm 3 to rise, and controls the turnover motor 34 to drive the clamping oil cylinder 33 and the sand box 5 to turn over 180° together, and then places the sand box 5 on the mold base plate 6; Finally, the clamping oil cylinder 33 releases the sand box 5, and the mold double arm 3 rises to the starting position, waiting for the next mold.

[0046] The scheme also provides a control method of a mold stripping system, which is realized by relying on the mold stripping system, adopts the flow chart as shown in Figure 4 The size of the sand box 5 of the mold stripping in this embodiment is 2200mm×1700mm×300mm; including the following steps:

[0047] S1: The sand box 5 height signal, mold double arm 3 working information, sand box 5 displacement distance information (10mm) and other information are input into the PLC controller for coding, and then the mold base plate 6 is transported to the mold stripping station with the sand box 5;

[0048] PLC controller controls the transmission motor to start, when the sand box 5 and the stripper plate 6 are placed on the transmission roller 411 together, they are transmitted forward together. After the sand box 5 and the stripper plate 6 are transmitted to the stripping position, the proximity switch 43 detects the arrival of the stripper plate 6 at the stripping position and sends the sand box 3 in position signal to the PLC controller, then the PLC controller controls the transmission motor to stop, so that the stripper plate 6 stays at the stripping position; then the PLC controller controls the end head cylinder 44 to clamp the stripper plate 6.

[0049] S2: The grating sensor 42 detects the height of the sand box 5 and forms a height signal, then the height signal is sent to the PLC controller, and the PLC controller matches the code to confirm the stripping arm 3 working information, including the sliding stroke, lifting stroke, clamping stroke and other information of the stripping arm 3.

[0050] S3: The PLC controller controls the stripping arm 3 to rise according to the stripping arm 3 working information corresponding to the sand box 5, and the stripping arm 3 rising distance in this embodiment is 10mm;

[0051] Specifically, the controller controls the stripping arm 3 to start stripping according to the matched stripping arm 3 working information; specifically, the controller controls the roller 31 to slide to the top of the sand box 5, then controls the lifting cylinder 32 to lower the clamping cylinder 33 at the bottom of the stripping arm 3 to the height of the clamping pin 331 being flush with the clamping groove 51, then controls the clamping cylinder 33 to insert the clamping pin 331 into the clamping groove 51, and finally controls the lifting cylinder 32 to drive the sand box 5 to rise 10mm.

[0052] S4: The displacement sensor 45 detects the displacement of the sand box 5 and forms a displacement signal, then the displacement signal is sent to the PLC controller, and the PLC controller controls the vibrator 46 to start according to the displacement signal of the sand box 5;

[0053] The theoretical displacement of the sand box 5 in this embodiment is 10mm; when the displacement signal of the sand box 5 detected by the displacement sensor 45 is less than 10mm, the PLC controller determines that the stripping fails by comparing the actual displacement signal with the preset stripping displacement, and then the PLC controller controls the vibrator 46 to start, and the vibration of the vibrator 46 drives the stripper plate 6 to vibrate, thereby speeding up the separation of the stripper plate 6 and the sand box 5; when the displacement signal of the sand box 5 received by the PLC controller is greater than or equal to 10mm, the PLC controller determines that the stripping is successful by comparison.

[0054] In practical application, if the stripping is still unsuccessful after the vibration of the vibrator 46, the vibrator 46 vibration program will be started repeatedly until the sand box 5 and the stripper plate 6 are separated to make the stripping successful.

[0055] S5: After the stripping is successful, the PLC controller controls the stripping arm 3 to drive the sand box 5 to rise and transport to the designated position.

[0056] Specifically, after the controller judges the signal of successful mold stripping, the controller controls the end head cylinder 44 to loosen the mold stripping bottom plate 6 and controls the transmission motor to start, and the mold stripping bottom plate 6 is transmitted away from the mold stripping position; at the same time, the lifting cylinder 32 is controlled to drive the sand box 5 to rise and the overturning motor 34 is controlled to overturn 180°, and after the proximity switch 43 detects that the mold stripping bottom plate 6 is transmitted away from the mold stripping position, the PLC controller controls the lifting cylinder 32 to descend until the sand box 5 is placed on the transmission roller 411, and then the clamping oil cylinder 33 is controlled to loosen the sand box 5, and finally the mold stripping double arms 3 are controlled to return and the transmission motor is controlled to start, so that the sand box 5 is transmitted away from the mold stripping position, and the mold stripping is completed and preparation for the next mold stripping is made.

[0057] The application has been applied to actual batch production, and the sand molds with a size of 2200mm*1700mm*300mm, 2200mm*1700mm*600mm and the like prepared by using the method have high quality consistency and do not need manual operation. The scheme can accurately, effectively and reliably realize the mold stripping process, greatly improves the mold stripping efficiency and ensures the sand mold quality, thereby improving the molding efficiency.

[0058] Example 2

[0059] In order to further accelerate the mold stripping efficiency, the difference between the embodiment and the embodiment 1 is that, as shown in the figure, Figure 5 The alarm 7 is electrically connected with the PLC controller.

[0060] In the embodiment, when the vibrator 46 is started for multiple times and still cannot assist the separation of the sand box 5 and the mold stripping bottom plate 6, the embodiment is specifically three times, when the vibrator 46 is started for three times and still cannot assist the separation of the sand box 5 and the mold stripping bottom plate 6, the PLC controller controls the alarm 7 to start, so as to notify the operator to handle in time, and avoid the equipment jam to affect the production efficiency.

[0061] The above-mentioned is only an embodiment of the application, and the well-known specific technical solutions and / or common knowledge in the scheme are not described in detail. It should be noted that for those skilled in the art, without departing from the technical solutions of the application, a number of modifications and improvements can be made, which should also be regarded as the protection scope of the application, and these will not affect the effect and practicality of the application. The protection scope claimed in the application should be subject to the content of the claims, and the specific implementation mode and the like in the description can be used to explain the content of the claims.

Claims

1. A draw system for increasing draw efficiency, comprising: The utility model provides a mould stripping device, including frame, mould stripping double arms, mould stripping work station below mould stripping double arms and controller, mould stripping double arms slide connection in frame, be equipped with the first drive device that drives mould stripping double arms to lift on mould stripping double arms, first clamping piece is opposite to be equipped with power output end of mould stripping double arms, first clamping piece is used for clamping sand box, mould stripping work station is equipped with proximity switch, displacement sensor and vibrator, proximity switch, displacement sensor, vibrator, first drive device all are electrically connected with controller, mould stripping work station is equipped with second clamping piece still, is used for clamping the mould stripping base plate that enters mould stripping work station, The controller controls the lifting of the mould stripping double arms, then the displacement sensor detects the displacement of the sand box and forms a displacement signal, and then transmits the displacement signal to the controller, which controls the vibrator to start according to the displacement signal. When the displacement signal of the sand box received by the controller is greater than or equal to the preset mould stripping displacement, the controller will determine that the mould stripping is successful by comparison, and when the displacement signal of the sand box detected by the displacement sensor is less than the preset mould stripping displacement, the controller will determine that the mould stripping fails by comparing the actual displacement signal with the preset mould stripping displacement, and then controls the vibrator to start, so that the vibration of the vibrator drives the vibration of the mould stripping base plate, thereby accelerating the separation of the mould stripping base plate and the sand box. An alarm is arranged on the frame and is electrically connected with the controller, and when the vibrator cannot help the separation of the sand box and the mould stripping base plate after starting for several times, the controller controls the alarm to start to inform the operator to handle in time.

2. The draw system of claim 1, wherein: A guide rail is arranged on the frame, a pulley is arranged on the mould stripping double arms and can slide on the guide rail, and a third driving mechanism is arranged on the frame to drive the mould stripping double arms to slide along the frame.

3. The draw system of claim 2, wherein: Clamping grooves are arranged on both sides of the sand box for the insertion of the first clamping piece, a clamping pin shaft is connected with the power output end of the first clamping piece, and a second driving device is arranged between the power output end of the first clamping piece and the clamping pin shaft to drive the clamping pin shaft to flip.

4. The draw system of claim 3, wherein: The mould stripping work station comprises a plurality of transmission rollers rotatably connected to the frame, transmission gears are coaxially connected to the end portions of the transmission rollers, and a transmission chain is connected between the transmission gears.

5. The draw system of claim 4, wherein: The mould stripping work station is further provided with grating sensors, which are arranged on the frame fixing the transmission rollers and are electrically connected with the controller.

6. The draw system of claim 5, wherein: The controller records the code of the sand box, the code corresponds to the working information of the mould stripping double arms, and the working information of the mould stripping double arms includes the lifting stroke and the clamping stroke of the mould stripping double arms.

7. The draw system of claim 6, wherein: The clamping groove is located in the middle of the sand box, and the distance between the clamping groove and the mould stripping base plate is not less than 150 mm.

8. The draw system of claim 1, wherein: The lifting distance of the mould stripping double arms is 10 mm.

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