Automatic weighing device for shell

Abstract

The invention discloses an automatic weighing device for a shell, and belongs to the field of precision casting. The technical problems that an existing shell weighing device is located outside a drying room, the structure is complex, the installation occupied space is large, manual assistance is needed in the weighing process, and the weighing efficiency is low are solved. The automatic shell weighing device comprises a screw fixing assembly, an upper support, a lower support, a connecting rod assembly, a pushing air cylinder assembly, a lifting air cylinder assembly, a weighing sensor and a lifting hook. The upper support is fixed with an I-shaped beam in the drying room through a screw rod fixing assembly; the connecting rod assembly is hinged to the upper support and the lower support. The pushing cylinder assembly is hinged to the connecting rod assembly; the lifting cylinder assembly is connected with the weighing sensor; the weighing sensor is connected with the lifting hook; during weighing, the lifting hook can hook the shell when moving leftwards; when the lifting hook moves upwards, the shell can be weighed, and the weight of the shell can be obtained through the weighing sensor. According to the invention, the weight of the shell can be automatically and accurately measured.

Description

Technical Field

[0001] The invention relates to the technical field of precision casting, and in particular to an automatic weighing device for a mold shell. Background Art

[0002] Investment casting is a type of precision casting. Investment casting usually uses easily fusible wax to make a wax pattern, repeatedly dips the wax pattern into a refractory material to make a shell, then melts the wax pattern and discharges it from the shell. The shell is then dried to form a hard shell. The quality of the shell is crucial to improving the quality of investment casting.

[0003] The weight of the shell changes each time the wax mold is dipped in refractory material, and it will change again after drying. Therefore, by testing the weight before and after drying, on the one hand, we can obtain the degree of drying of the shell to determine the time required for drying, and then study the effect of drying time on the quality of the shell; on the other hand, we can determine the number of times the shell is dipped in refractory material to decide whether to increase or decrease the number. The weighing test of the shell is of great significance for guiding the production process and saving costs.

[0004] The existing device is located outside the drying room, has a bulky structure, and occupies a large installation space; the existing device requires a robot or manual assistance, and the mold shell must be placed on the weighing device before the mold shell can be weighed. Summary of the invention

[0005] In view of the above analysis, the present invention aims to provide an automatic mold shell weighing device to solve the problem that the existing mold shell weighing device is located outside the drying room, the device structure is complex and bulky, and occupies a large installation space; in addition, the existing weighing device requires a robot or manual assistance, and the mold shell must be placed on the weighing device before weighing, and the weighing efficiency is low.

[0006] The purpose of the present invention is mainly achieved through the following technical solutions:

[0007] The present invention provides a mold shell automatic weighing device, which is located on one side of the mold shell conveying line in the drying room;

[0008] The shell automatic weighing device comprises a screw fixing assembly, an upper support, a lower support, a connecting rod assembly, a pushing cylinder assembly, a lifting cylinder assembly, a weighing sensor and a lifting hook;

[0009] The upper support and the lower support are arranged parallel to each other in the horizontal direction; the upper surface of the upper support is fixed to the I-beam inside the drying room through a screw fixing assembly;

[0010] The connecting rod assembly is arranged between the upper support and the lower support and is hinged between the upper support and the lower support; the pushing cylinder assembly is installed on the right side of the lower surface of the upper support, and the pushing cylinder assembly is hinged with the connecting rod assembly; the pushing cylinder assembly can drive the connecting rod assembly and the lower support to move left or right;

[0011] The lifting cylinder assembly is installed on the left side of the lower surface of the lower support, and the lifting cylinder assembly is connected to one end of the weighing sensor; the other end of the weighing sensor is connected to the lifting hook; the lifting cylinder assembly can drive the weighing sensor and the lifting hook to move upward or downward together.

[0012] In one possible design, the connecting rod assembly is disposed on the left side of the lower surface of the upper support and on the left side of the upper surface of the lower support;

[0013] The connecting rod assembly includes two pairs of left and right connecting rods; the two pairs of left and right connecting rods are hinged between the upper support and the lower support;

[0014] The push cylinder assembly can drive a pair of connecting rods on the right side to drive the entire connecting rod assembly and the lower support to move left and right.

[0015] In a possible design, a pushing cylinder mounting hole is provided on the right side of the lower surface of the upper support, and the pushing cylinder assembly is installed in the pushing cylinder mounting hole through a first fastener.

[0016] In one possible design, the pushing cylinder assembly includes a pushing cylinder and a pushing cylinder joint;

[0017] The push cylinder joint is installed at the end of the push cylinder piston rod; the push cylinder joint is hinged to a pair of connecting rods on the right side of the connecting rod assembly through a pin shaft;

[0018] Under the action of compressed air, the piston rod of the push cylinder can be extended and retracted left and right, and drives the push cylinder joint, the connecting rod assembly, and the lower support to move left or right together.

[0019] In a possible design, a lifting cylinder mounting hole is designed on the left side of the lower surface of the lower support; the lifting cylinder assembly is installed in the lifting cylinder mounting hole through a second fastener.

[0020] In one possible design, a lift cylinder assembly includes a lift cylinder and a lift cylinder joint;

[0021] The lifting cylinder joint is installed at the end of the lifting cylinder piston rod; the lifting cylinder joint is hinged with the weighing sensor through a pin shaft; the weighing sensor is connected with the lifting hook through a pin shaft;

[0022] Under the action of compressed air, the piston rod of the lifting cylinder can be extended and retracted up and down, and drive the lifting cylinder joint, weighing sensor and lifting hook to move upward or downward together.

[0023] In one possible design, the lifting cylinder joint, the load cell and the pin shaft are all clearance fits, and both can rotate around the pin shaft.

[0024] In one possible design, a filter pressure reducing valve is also included;

[0025] A filter pressure reducing valve installation hole is provided on the right side of the upper surface of the upper support, and the filter pressure reducing valve is installed on the right side of the upper surface of the upper support through the filter pressure reducing valve installation hole;

[0026] The filter pressure reducing valve is used to provide compressed and filtered air to the push cylinder and the lift cylinder so that the two cylinders can extend and retract normally.

[0027] In a possible design, the filter pressure reducing valve is connected to the pushing cylinder and the lifting cylinder by an air pipe.

[0028] The present invention also provides a mold shell automatic weighing method, using the above-mentioned mold shell automatic weighing device, the mold shell automatic weighing method comprises the following steps:

[0029] Step 1: The mold shell is conveyed by a conveyor line, and the control system gives a stop signal, and the mold shell stops at the mold shell automatic weighing device;

[0030] Step 2: When the control system does not give a weighing detection signal, the pushing cylinder assembly pushes the connecting rod fixing assembly, the lower support and the lifting hook to move to a side away from the conveying line;

[0031] Step 3: When the control system gives a weighing detection signal, the mold shell is weighed by using an automatic mold shell weighing device;

[0032] In step 3, the weight detection of the mold shell by using the mold shell automatic weighing device includes the following sub-steps:

[0033] Step 31, pushing the cylinder assembly to push the connecting rod fixing assembly, the lower support and the lifting hook to move toward a side close to the conveying line;

[0034] Step 32: Use the lifting cylinder assembly to lift the weighing sensor, the lifting hook and the mold shell on the lifting hook upwards, so that the mold shell is out of contact with the hanger; the weighing sensor detects the weight of the mold shell and feeds back the weight data to the control system;

[0035] Step 4: After receiving the data fed back by the weighing sensor, the control system gives a signal to cancel the weighing detection; at this time, the push cylinder assembly is used to push the connecting rod fixing assembly, the lower support and the lifting hook to the side away from the conveyor line;

[0036] Step 5: Repeat steps 2 to 4 to weigh the next shell.

[0037] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0038] (1) The automatic weighing device for the mold shell of the present invention is located in a closed drying room and is not affected by the temperature and humidity of the external environment on the weight of the mold shell. The weight information is transmitted to the external control system in a timely manner through the weighing sensor. The data is accurate, timely, stable and reliable.

[0039] (2) The mold shell automatic weighing device of the present invention can realize automatic detection of the mold shell weight without manual intervention, thus saving labor costs and improving production efficiency.

[0040] (3) The present invention fixes the mold shell automatic weighing device on the I-beam in the drying room through four sets of screw fixing components. First, the I-beam is used to provide a support point for the mold shell automatic weighing device of the present invention. Second, by hanging the mold shell automatic weighing device in mid-air, the space occupied by the mold shell automatic weighing device can be reduced, thereby reducing its installation space. Third, it can ensure that the mold shell automatic weighing device of the present invention weighs the mold shell in the drying room, and can prevent the mold shell from being affected by the external environment temperature and humidity, thereby ensuring the accuracy of the mold shell weighing.

[0041] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages can become obvious from the description, or can be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained through the contents particularly pointed out in the embodiments of the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The drawings are only for the purpose of illustrating particular embodiments and are not to be considered limiting of the present invention. Like reference symbols denote like components throughout the drawings.

[0043] Figure 1 It is a structural schematic diagram of the automatic weighing device for mold shells of the present invention;

[0044] Figure 2 for Figure 1 Left side view;

[0045] Figure 3 This is the posture diagram of the automatic weighing device for the mold shell when the control system does not give a weighing detection signal;

[0046] Figure 4 for Figure 3 Left side view;

[0047] Figure 5 The attitude of the automatic weighing device for the mold shell when the control system gives a weighing detection signal Figure 1 ;

[0048] Figure 6 for Figure 5 Left side view;

[0049] Figure 7 The attitude of the automatic weighing device for the mold shell when the control system gives a weighing detection signal Figure 2 ;

[0050] Figure 8 for Figure 7 Left side view.

[0051] Reference numerals:

[0052] 1-screw fixing assembly; 2-connecting rod; 3-pushing cylinder joint; 4-upper support; 5-pushing cylinder; 6-filter pressure reducing valve; 7-lower support; 8-lifting cylinder; 9-lifting cylinder joint; 10-weighing sensor; 11-lifting hook; 12-first positioning sleeve; 13-first pin; 14-second positioning sleeve; 15-second pin; 16-third positioning sleeve; 17-third pin; 18-fourth pin; 19-fourth positioning sleeve; 20-fifth pin; 21-I-beam; 22-conveyor line; 23-hanging rack; 24-mold shell. DETAILED DESCRIPTION

[0053] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0054] The present invention provides a mold shell automatic weighing device, such as Figures 1 to 8As shown, the mold shell automatic weighing device is located on one side of the mold shell 24 conveying line 22 in the drying room; the mold shell automatic weighing device includes a screw fixing assembly 1, an upper support 4, a lower support 7, a connecting rod fixing assembly, a pushing cylinder assembly, a lifting cylinder assembly, a weighing sensor 10 and a lifting hook 11; the upper support 4 and the lower support 7 are arranged parallel to the horizontal direction; the upper surface of the upper support 4 is fixed to the I-beam 21 inside the drying room through the screw fixing assembly 1; the connecting rod fixing assembly is arranged between the upper support 4 and the lower support 7 and is hinged between the upper support 4 and the lower support 7; the pushing cylinder assembly is installed on the right side of the lower surface of the upper support 4, and the pushing cylinder assembly is hinged to the connecting rod fixing assembly The pushing cylinder assembly can drive the connecting rod fixing assembly and the lower support 7 to move left or right; the lifting cylinder assembly is installed on the left side of the lower surface of the lower support 7, and the lifting cylinder assembly is connected to one end of the weighing sensor 10; the other end of the weighing sensor 10 is connected to the lifting hook 11; the lifting cylinder assembly can drive the weighing sensor 10 and the lifting hook 11 to move upward or downward together; during weighing, the lifting hook 11 can hook the mold shell 24 when moving to the left, and can release the mold shell 24 when moving to the right; the lifting hook 11 can weigh the mold shell 24 when moving upward, and the weighing ends when moving downward; the weight of the mold shell 24 can be obtained through the weighing sensor 10.

[0055] Specifically, the mold shell automatic weighing device of the present invention is installed on the I-beam 21 inside the drying room through a screw fixing assembly 1, and is located on one side of the mold shell 24 conveyor line 22. The conveyor line 22 conveys the mold shell 24, gives a stop signal through the control system, and stops at the mold shell automatic weighing device of the present invention. The device performs weight detection on the mold shell 24.

[0056] In order to firmly fix the invented shell automatic weighing device on the I-beam 21 inside the drying room, the present invention has four sets of screw fixing assemblies 1, each set of screw fixing assemblies 1 is composed of a screw, a nut and a gasket, and one end of the screw fixing assembly 1 is connected to the upper support 4, and the other end is connected to the I-beam 21.

[0057] Specifically, the I-beam in the drying room includes an upper crossbeam, a vertical middle beam and a lower crossbeam; four upper threaded holes are provided on the lower crossbeam of the I-beam, and four lower threaded holes are provided on the upper surface of the upper support 4 of the present invention. The four upper threaded holes and the four lower threaded holes are arranged in corresponding positions, and four bolts are respectively used to connect the four upper threaded holes and the four lower threaded holes, and nuts and washers are provided on the bolts.

[0058] Compared with the prior art, the present invention fixes the mold shell automatic weighing device on the I-beam 21 in the drying room through four sets of screw fixing components 1. First, the I-beam is used to provide a support point for the mold shell automatic weighing device of the present invention; second, by hanging the mold shell automatic weighing device in mid-air, the space occupied by the mold shell automatic weighing device can be reduced, thereby reducing its installation space; third, it can ensure that the mold shell automatic weighing device of the present invention weighs the weight of the mold shell 24 in the drying room, and can prevent the mold shell 24 from being affected by the external environmental temperature and humidity, thereby ensuring the accuracy of the mold shell 24 weighing.

[0059] It should be noted that the connecting rod fixing assembly of the present invention is arranged on the left side of the lower surface of the upper support 4, and a pushing cylinder mounting hole is provided on the right side of the lower surface of the upper support 4. The pushing cylinder assembly is installed in the pushing cylinder mounting hole through the first fastener.

[0060] Compared with the prior art, the present invention fixes the pushing cylinder assembly on the right side of the connecting rod fixing assembly, and the top of the connecting rod fixing assembly is hinged to the bottom surface of the upper support 4, which can ensure that the pushing cylinder assembly can drive the connecting rod fixing assembly and the lower support 7 thereunder to move left or right.

[0061] In order to stably connect the upper support 4 and the lower support 7, the connecting rod fixing assembly of the present invention is arranged on the left side of the lower surface of the upper support 4 and the left side of the upper surface of the lower support 7; the connecting rod fixing assembly includes two pairs of left and right connecting rods 2; the two pairs of left and right connecting rods 2 are hinged between the upper support 4 and the lower support 7; the pushing cylinder assembly can drive the right pair of connecting rods 2 and then drive the entire connecting rod fixing assembly and the lower support 7 to move left and right.

[0062] Specifically, two pairs of upper ears with holes are designed on the left side of the lower surface of the upper support 4, including two upper ears with holes on the left side and two upper ears with holes on the right side; two pairs of lower ears with holes are designed on the upper surface of the lower support 7, including two lower ears with holes on the left side and two lower ears with holes on the right side; the two upper ears with holes on the left side correspond to the positions of the two lower ears with holes on the left side, and the two upper ears with holes on the right side correspond to the positions of the two lower ears with holes on the right side.

[0063] The connecting rod fixing assembly of the present invention includes four connecting rods 2 which are parallel to each other and have connecting holes at both ends, wherein every two connecting rods 2 form a group, which are divided into a left group of connecting rods 2 and a right group of connecting rods 2; the top and bottom ends of the left group of connecting rods 2 are respectively hinged to the left upper support ear with hole and the left lower support ear with hole to form a parallelogram, and the connecting hole at the top end of the left group of connecting rods 2 is located on the inner side of the left upper support ear with hole, and the connecting hole at the bottom end of the left group of connecting rods 2 is located on the inner side of the left lower support ear with hole; similarly, the top and bottom ends of the right group of connecting rods 2 are respectively hinged to the right upper support ear with hole and the right lower support ear with hole to form a parallelogram, and the connecting hole at the top end of the right group of connecting rods 2 is located on the inner side of the right upper support ear with hole, and the connecting hole at the bottom end of the right group of connecting rods 2 is located on the inner side of the right lower support ear with hole. The two left upper ears with holes and the top connecting hole of the left group connecting rod 2, as well as the two right upper ears with holes and the top connecting hole of the right group connecting rod 2 are connected by a first pin shaft 13; similarly, the two left lower ears with holes and the bottom connecting hole of the left group connecting rod 2, as well as the two right lower ears with holes and the bottom connecting hole of the right group connecting rod 2 are connected by a third pin shaft 17.

[0064] Compared with the prior art, the present invention drives the lower support 7 to move forward and backward around the support ear of the upper support 4 by pushing the cylinder assembly through the pushing cylinder joint 3 connected to the connecting rod fixing assembly.

[0065] In order to limit the left-side connecting rod 2 (i.e., the pair of connecting rods 2 on the left) and the right-side connecting rod 2 (i.e., the pair of connecting rods 2 on the right), the present invention provides a pair of positioning sleeves between the left-side connecting rod 2 and between the right-side connecting rod 2; among the four positioning sleeves, the left and right positioning sleeves located at the top are the first positioning sleeves 12, and the left and right positioning sleeves located at the bottom are the third positioning sleeves 16; the first positioning sleeve 12 is sleeved on the first pin shaft 13, and the two ends of the first positioning sleeve 12 are in contact with the two corresponding upper support ears with holes; the third positioning sleeve 16 is sleeved on the third pin shaft 17, and the two ends of the third positioning sleeve 16 are in contact with the two corresponding lower support ears with holes.

[0066] Compared with the prior art, the present invention connects the upper support 4, the lower support 7, the left connecting rod 2, the right connecting rod 2, the first positioning sleeve 12 and the third positioning sleeve 16 together by perforating two first pins 13 and two third pins 17.

[0067] It should be noted that the left upper lug with hole and the right upper lug with hole are both clearance-matched with the first pin shaft 13, and similarly, the left lower lug with hole and the right lower lug with hole are both clearance-matched with the third pin shaft 17; the left upper lug with hole and the right upper lug with hole can rotate around the first pin shaft 13, and similarly, the left lower lug with hole and the right lower lug with hole can rotate around the third pin shaft 17. The left group connecting rod 2 and the right group connecting rod 2 are both clearance-matched with the first pin shaft 13 and the third pin shaft 17, and the left group connecting rod 2 and the right group connecting rod 2 can rotate around the first pin shaft 13 and the third pin shaft 17.

[0068] In order to connect the connecting rod fixing assembly and the pushing cylinder assembly, the present invention opens an intermediate connecting hole in the middle of the right-side connecting rod 2, and the two intermediate connecting holes on the right-side connecting rod 2 are connected by a second pin shaft 15. The pushing cylinder joint 3 of the pushing cylinder assembly is connected to the middle position of the second pin shaft 15, and two second positioning sleeves 14 are also provided on the second pin shaft 15. The two second positioning sleeves 14 are symmetrically located on both sides of the pushing cylinder joint 3.

[0069] Compared with the prior art, the present invention utilizes the second pin shaft 15 to connect the right side connecting rod 2, the two second positioning sleeves 14 and the pushing cylinder assembly in series, thereby realizing the connection between the connecting rod fixing assembly and the pushing cylinder assembly, thereby ensuring that the pushing cylinder assembly can drive the entire connecting rod fixing assembly and the lower support 7 to move left and right together.

[0070] It should be noted that the right connecting rod 2 , the second positioning sleeve 14 and the pushing cylinder joint 3 of the present invention are all clearance-fitted with the second pin shaft 15 , and all three can rotate around the second pin shaft 15 .

[0071] In order to be able to push the connecting rod fixing assembly and the lower support 7 to move left and right, the pushing cylinder assembly of the present invention includes a pushing cylinder 5 and a pushing cylinder joint 3; wherein, the pushing cylinder joint 3 is installed at the end of the piston rod of the pushing cylinder 5; the pushing cylinder joint 3 is hinged with a pair of connecting rods 2 on the right side of the connecting rod fixing assembly through a pin shaft (that is, the second pin shaft 15); under the action of compressed air, the piston rod of the pushing cylinder 5 can be extended and retracted left and right, and drive the pushing cylinder joint 3, the connecting rod fixing assembly, and the lower support 7 to move left or right together.

[0072] Specifically, the push cylinder 5 of the present invention is installed on the right side of the lower surface of the upper support 4 through a first fastener (such as a fastening bolt), and a cylinder joint is installed at the end of the piston rod of the push cylinder 5. The cylinder joint is connected to the right group connecting rod 2 through a second pin shaft 15, thereby realizing the connection with the entire connecting rod fixing assembly and the lower support 7. Under the action of compressed air, the piston rod of the push cylinder 5 can be extended and retracted left and right, and drives the push cylinder joint 3, the entire connecting rod fixing assembly and the lower support 7 to move left or right together.

[0073] It should be noted that a mounting hole for the lifting cylinder 8 is designed on the left side of the lower surface of the lower support 7 of the present invention; the lifting cylinder assembly is installed in the mounting hole for the lifting cylinder 8 through a second fastener (such as a fastening bolt).

[0074] In order to drive the weighing sensor 10 and the lifting hook 11 to move up and down, the lifting cylinder assembly of the invention includes a lifting cylinder 8 and a lifting cylinder joint 9; the lifting cylinder joint 9 is installed at the end of the piston rod of the lifting cylinder 8; the lifting cylinder joint 9 is hinged to the weighing sensor 10 through a pin (defined as the fourth pin 18); the weighing sensor 10 is connected to the lifting hook 11 through a pin (defined as the fifth pin 20); under the action of compressed air, the piston rod of the lifting cylinder 8 can be extended and retracted up and down, and drive the lifting cylinder joint 9, the weighing sensor 10 and the lifting hook 11 to move upward or downward together.

[0075] It should be noted that the lifting cylinder joint 9 , the weighing sensor 10 and the fourth pin shaft 18 are all clearance-fitted and can rotate around the fourth pin shaft 18 .

[0076] It should be noted that the upper and lower ends of the weighing sensor 10 of the present invention are both connectors with holes. The upper connector with holes of the weighing sensor 10 is connected to the lifting cylinder joint 9 through the fourth pin 18, and the lower connector with holes is located in the middle of the lifting hook 11. There is a positioning sleeve (defined as the fourth positioning sleeve 19) on the left and right sides of the lower connector with holes. The pin (fifth pin 20) passes through the middle hole of the lifting hook 11 to connect the lifting hook 11, the fourth positioning sleeve 19 and the lower connector in series. The lifting hook 11, the fourth positioning sleeve 19 and the lower connector with holes of the weighing sensor 10 are all clearance fits with the fifth pin 20, and can rotate around the fifth pin 20.

[0077] It should be noted that, under the lifting effect of the lifting cylinder 8, the weighing sensor 10 can drive the lifting hook 11 to move up and down; the weighing sensor 10 is connected to the control system through a cable and can upload the detection data to the control system.

[0078] In order to hook the mold shell 24, the mold shell 24 weighing device of the present invention also includes two perforated support plates, which have the same structure and are arranged parallel to each other. One end of the perforated support plate is fixed to the right side of the lower surface of the lower support 7, and the other end is provided with a bottom connecting pin hole for hinged connection with the perforated hook plate.

[0079] The lifting hook 11 of the present invention includes two hook plates with holes (i.e., two lifting hooks), and the two hook plates with holes have the same structure and are arranged parallel to each other; the two ends of the hook plate with holes are respectively a hook end and a connecting end, and a middle connecting pin hole is provided in the middle of the hook plate with holes, and an end connecting pin hole is provided at the connecting end; the connecting ends of the two hook plates with holes are both located on the inner sides of the two perforated support plates and the end connecting pin holes of the hook plates with holes are aligned with the bottom connecting pin holes of the perforated support plates, and the two are connected by a sixth pin shaft, and a fifth positioning sleeve is provided on the sixth pin shaft; a fifth pin shaft 20 is provided on the two middle connecting pin holes, and the fifth pin shaft 20 passes through the lower end perforated connector of the weighing sensor 10, and a fourth positioning sleeve 19 is provided on the fifth pin shaft 20.

[0080] It should be noted that the perforated support plate, the perforated hook plate and the fifth positioning sleeve and the sixth pin shaft are all clearance fits, and all three can rotate around the sixth pin shaft; in addition, the perforated hook plate and the lower end connecting head of the weighing sensor 10 and the fourth positioning sleeve 19 and the fifth pin shaft 20 are also clearance fits, and all three can rotate around the fifth pin shaft 20.

[0081] In order to provide air source power to the above-mentioned pushing cylinder 5 and lifting cylinder 8 to ensure the normal operation of the two cylinders, the automatic weighing device of the mold shell of the present invention also includes a filter pressure reducing valve 6; a filter pressure reducing valve mounting hole is provided on the right side of the upper surface of the upper support 4, and the filter pressure reducing valve 6 is installed on the right side of the upper surface of the upper support 4 through the filter pressure reducing valve mounting hole; the filter pressure reducing valve 6 is used to provide compressed and filtered air to the pushing cylinder 5 and the lifting cylinder 8 to enable the two cylinders to extend and retract normally.

[0082] It should be pointed out that the filter pressure reducing valve 6 of the present invention is connected to the pushing cylinder 5 and the lifting cylinder 8 by an air pipe.

[0083] It needs to be emphasized again that all the pins of the present invention are hinge points, and each component can rotate around the corresponding hinge point.

[0084] The present invention also provides a method for automatically weighing a mold shell 24, using the above-mentioned automatic weighing device for the mold shell, and the method for automatically weighing the mold shell 24 comprises the following steps:

[0085] Step 1: The mold shell 24 is conveyed by the conveyor line 22, and the control system gives a stop signal, and the mold shell 24 stops at the mold shell automatic weighing device;

[0086] Step 2, when the control system does not give a weighing detection signal, the push cylinder assembly is used to push the connecting rod fixing assembly, the lower support 7 and the lifting hook 11 to move to a side away from the conveying line 22;

[0087] Step 3: When the control system gives a weighing detection signal, the mold shell 24 is weighted by using the mold shell automatic weighing device;

[0088] In step 3, the weight detection of the mold shell 24 by using the mold shell automatic weighing device includes the following sub-steps:

[0089] Step 31, pushing the cylinder assembly to push the connecting rod fixing assembly, the lower support 7 and the lifting hook 11 to move to a side close to the conveying line 22;

[0090] Step 32, using the lifting cylinder assembly to lift the weighing sensor 10, the lifting hook 11 and the mold shell 24 on the lifting hook 11 upwards; the mold shell 24 is separated from the hanger 23; the weighing sensor 10 detects the weight of the mold shell 24 and feeds back the weight data to the control system;

[0091] Step 4: After receiving the data fed back by the weighing sensor 10, the control system gives a signal to cancel the weighing detection; at this time, the push cylinder assembly is used to push the connecting rod fixing assembly, the lower support 7 and the lifting hook 11 to move to the side away from the conveying line 22;

[0092] Step 5: Repeat steps 2 to 4 to weigh the next mold shell 24.

[0093] In the above step 2, when the control system does not give a weighing detection signal, the posture of the automatic weighing device for the mold shell of the present invention is as follows: Figure 3 and Figure 4 As shown; the air source acts on the lifting cylinder 8 and the pushing cylinder 5 respectively through the filter pressure reducing valve 6, so that the piston rod of the lifting cylinder 8 is in an extended state, and the piston rod of the pushing cylinder 5 is in a contracted state.

[0094] In the above step 2, the piston rod of the push cylinder 5 pulls the connecting rod fixing assembly to the far right side (away from the side of the shell 24 conveying line 22) by pushing the cylinder joint 3, and the lower support 7 connected to the connecting rod 2 and the lifting cylinder 8, weighing sensor 10 and lifting hook 11 installed thereon are all pulled back to the far right side.

[0095] In the above step 3, when the control system gives a weighing detection signal, the posture of the shell automatic weighing device is as follows: Figure 3 and Figure 4 As shown; according to the order of execution of the actions, the shell automatic weighing device first presses Figure 5 and Figure 6 Posture action, back press Figure 7 and Figure 8 Posture action.

[0096] In the above step 31, if Figure 5 and Figure 6As shown, the air source acts on the lifting cylinder 8 and the pushing cylinder 5 respectively through the filter pressure reducing valve 6, the piston rod of the lifting cylinder 8 is still in an extended state, and the piston rod of the pushing cylinder 5 is also in an extended state; the piston rod of the pushing cylinder 5 pushes the connecting rod 2 to the left through the pushing cylinder joint 3, and pushes the connecting rod 2 to a vertical position. At this time, the connecting rod 2 is at the far left, and the lower support 7 connected to the connecting rod 2 and the lifting cylinder 8, weighing sensor 10 and lifting hook 11 installed thereon are all pushed to the far left; at this time, the two lifting hooks of the lifting hook 11 are inserted into the gap between the hanger 23 and the shell 24.

[0097] In step 32 above, press Figure 5 and Figure 6 After the gesture is completed, the device then proceeds Figure 7 and Figure 8 Posture and action. Figure 7 and Figure 8 As shown, the piston rod of the push cylinder 5 is still in an extended state, while the piston rod of the lifting cylinder 8 is in a retracted state; the piston rod of the lifting cylinder 8 lifts the weighing sensor 10 and the lifting hook 11 upwards through the lifting cylinder joint 9; at this time, the two lifting hooks of the lifting hook 11 lift the mold shell 24 from the hanger 23, so that the mold shell 24 is out of contact with the hanger 23, and the weighing sensor 10 detects the weight of the mold shell 24 and feeds back the weight data to the control system.

[0098] In the above step 4, after the control system receives the data fed back by the weighing sensor 10, giving a cancel weighing detection signal includes the following sub-steps:

[0099] Step 41, the piston rod of the lifting cylinder 8 moves to an extended state, and drives the weighing sensor 10 and the lifting hook 11 to move downward, and the mold shell 24 is placed back on the hanger 23;

[0100] Step 42, push the piston rod of the cylinder 5 to move to a retracted state, and pull the connecting rod 2, the lower support 7 and the lifting cylinder 8, the weighing sensor 10 and the lifting hook 11 installed thereon back to the far right;

[0101] Step 43, the weighing process of the shell 24 is completed.

[0102] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A mold shell automatic weighing device, characterized in that: The mold shell automatic weighing device is located on one side of the mold shell conveying line in the drying room; The mold shell automatic weighing device comprises a screw fixing assembly, an upper support, a lower support, a connecting rod assembly, a pushing cylinder assembly, a lifting cylinder assembly, a weighing sensor and a lifting hook; The upper support and the lower support are arranged in parallel in the horizontal direction; the upper surface of the upper support is fixed to the I-beam inside the drying room through the screw fixing assembly; The connecting rod assembly is arranged between the upper support and the lower support and is hinged between the upper support and the lower support; the pushing cylinder assembly is installed on the right side of the lower surface of the upper support, and the pushing cylinder assembly is hinged to the connecting rod assembly; the pushing cylinder assembly can drive the connecting rod assembly and the lower support to move left or right; The lifting cylinder assembly is installed on the left side of the lower surface of the lower support, and the lifting cylinder assembly is connected to one end of the weighing sensor; the other end of the weighing sensor is connected to the lifting hook; the lifting cylinder assembly can drive the weighing sensor and the lifting hook to move upward or downward together.

2. The automatic weighing device for mold shell according to claim 1, characterized in that: The connecting rod assembly is arranged on the left side of the lower surface of the upper support and the left side of the upper surface of the lower support; The connecting rod assembly includes two pairs of left and right connecting rods; the two pairs of left and right connecting rods are hinged between the upper support and the lower support; The pushing cylinder assembly can drive the pair of connecting rods on the right side to drive the entire connecting rod assembly and the lower support to move left and right.

3. The automatic weighing device for mold shell according to claim 2, characterized in that: A pushing cylinder mounting hole is provided on the right side of the lower surface of the upper support, and the pushing cylinder assembly is mounted in the pushing cylinder mounting hole through a first fastener.

4. The automatic weighing device for mold shell according to claim 3, characterized in that: The pushing cylinder assembly comprises a pushing cylinder and a pushing cylinder joint; The push cylinder joint is installed at the end of the push cylinder piston rod; the push cylinder joint is hinged to the pair of connecting rods on the right side of the connecting rod assembly through a pin shaft; Under the action of compressed air, the piston rod of the push cylinder can be extended and retracted to the left and right, and drive the push cylinder joint, the connecting rod assembly and the lower support to move to the left or right together.

5. The automatic weighing device for mold shells according to claim 4, characterized in that: A lifting cylinder mounting hole is designed on the left side of the lower surface of the lower support; the lifting cylinder assembly is installed in the lifting cylinder mounting hole through a second fastener.

6. The automatic weighing device for mold shells according to claim 5, characterized in that: The lifting cylinder assembly includes a lifting cylinder and a lifting cylinder joint; The lifting cylinder joint is installed at the end of the lifting cylinder piston rod; the lifting cylinder joint is hinged to the weighing sensor through a pin shaft; the weighing sensor is connected to the lifting hook through a pin shaft; Under the action of compressed air, the piston rod of the lifting cylinder can be extended and retracted up and down, and drives the lifting cylinder joint, the weighing sensor and the lifting hook to move upward or downward together.

7. The automatic weighing device for mold shells according to claim 6, characterized in that: The lifting cylinder joint, the weighing sensor and the pin shaft are all clearance-matched, and both can rotate around the pin shaft.

8. The automatic weighing device for mold shells according to any one of claims 4 to 7, characterized in that: Also included is a filter pressure reducing valve; A filter pressure reducing valve installation hole is provided on the right side of the upper surface of the upper support, and the filter pressure reducing valve is installed on the right side of the upper surface of the upper support through the filter pressure reducing valve installation hole; The filter pressure reducing valve is used to provide compressed and filtered air to the push cylinder and the lift cylinder so that the two cylinders can be normally extended and retracted.

9. The automatic weighing device for mold shells according to claim 8, characterized in that: The filter pressure reducing valve is connected to the pushing cylinder and the lifting cylinder through an air pipe.

10. A method for automatically weighing a mold shell, characterized in that: The mold shell automatic weighing device according to any one of claims 1 to 9 is used, and the mold shell automatic weighing method comprises the following steps: Step 1: The mold shell is conveyed by a conveyor line, and the control system gives a stop signal, and the mold shell stops at the mold shell automatic weighing device; Step 2: When the control system does not give a weighing detection signal, the pushing cylinder assembly pushes the connecting rod fixing assembly, the lower support and the lifting hook to move to a side away from the conveying line; Step 3: When the control system gives a weighing detection signal, the mold shell is weighed by using an automatic mold shell weighing device; In step 3, the weight detection of the mold shell by using the mold shell automatic weighing device includes the following sub-steps: Step 31, pushing the cylinder assembly to push the connecting rod fixing assembly, the lower support and the lifting hook to move toward a side close to the conveying line; Step 32: Use the lifting cylinder assembly to lift the weighing sensor, the lifting hook and the mold shell on the lifting hook upwards, so that the mold shell is out of contact with the hanger; the weighing sensor detects the weight of the mold shell and feeds back the weight data to the control system; Step 4: After receiving the data fed back by the weighing sensor, the control system gives a signal to cancel the weighing detection; at this time, the push cylinder assembly is used to push the connecting rod fixing assembly, the lower support and the lifting hook to the side away from the conveyor line; Step 5: Repeat steps 2 to 4 to weigh the next shell.

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