Automatic stop discharge device of screw extruder

Abstract

The application discloses an automatic stop discharging device of a screw extruder, and relates to the technical field of screw extruders, which comprises a supporting mechanism, a weighing mechanism, a pressing mechanism and a control mechanism, wherein the weighing mechanism and the pressing mechanism and the control mechanism are arranged on the supporting mechanism; the weighing mechanism is used for weighing the weight of a material blank extruded from a discharge port of the screw extruder; and the control mechanism controls the pressing mechanism to press a stop button of the screw extruder according to the weight weighed by the weighing mechanism. The application can reduce redundant material blanks and save resources.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of screw extruders, in particular to an automatic stop discharging device of a screw extruder. BACKGROUND

[0002] In the process of processing plastic products, plastic particles need to be heated and melted into a molten material by a screw extruder, and then extruded from the discharge port of the screw extruder. A scale is placed at the discharge port of the screw extruder, and the scale is used to weigh the weight of the material falling on the scale. When the worker observes from the scale that the weight of the material reaches the required processing weight of a single plastic product, the worker needs to manually press the stop button of the screw extruder, and then the worker needs to carry the material on the scale to a punch press for punch forming.

[0003] In the above process, because the worker needs to check the weighing weight of the scale himself, and also needs to manually press the stop button of the screw extruder, there is a risk that the worker will not press the stop button in time. The longer the time required to press the stop button, the more material will be extruded from the discharge port of the screw extruder. This part of the material is redundant material, which has already exceeded the required weight of the material, causing waste.

[0004] Therefore, how to reduce the redundant material and save resources is a technical problem that needs to be solved at present. SUMMARY

[0005] The present application is aimed at the above-mentioned deficiencies in the prior art, and provides an automatic stop discharging device of a screw extruder. The present application can reduce redundant material and save resources.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0007] An automatic stop discharging device of a screw extruder, comprising a supporting mechanism, a weighing mechanism, a pressing mechanism, and a control mechanism, the supporting mechanism being provided with the weighing mechanism, the pressing mechanism, and the control mechanism, the weighing mechanism being used to weigh the weight of the material extruded from the discharge port of the screw extruder, and the control mechanism being used to control the pressing mechanism to press the stop button of the screw extruder according to the weight weighed by the weighing mechanism.

[0008] Further, the supporting mechanism comprises a base, a supporting seat, a longitudinal rod, a transverse rod, and a vertical rod, the upper surface of the base being provided with the supporting seat, the upper end of the supporting seat being provided with the weighing mechanism, the side surface of the supporting seat being provided with the control mechanism, one side of the base being provided with the longitudinal rod extending in the longitudinal direction, the longitudinal rod at the end away from the base being provided with the transverse rod extending in the transverse direction, the transverse rod at the end away from the longitudinal rod being provided with the vertical rod extending upward, and the upper end of the vertical rod being provided with the pressing mechanism.

[0009] Further, the lower surface of the supporting seat is provided with a cavity, the upper surface of the base is provided with a lifting rod, the lifting rod is arranged in the cavity, and the output end of the lifting rod is connected with the cavity wall.

[0010] Further, the longitudinal rod, the transverse rod and the vertical rod all adopt a telescopic structure.

[0011] Further, the telescopic structure comprises an outer tube, an inner tube, an adjusting rod and an elastic member, the tube wall of the outer tube is provided with a plurality of adjusting holes, one end of the inner tube is in plug-in cooperation with the outer tube, the tube wall of the one end of the inner tube inserted into the outer tube is provided with a first insertion hole, the tube wall of the one end of the inner tube located outside the outer tube is provided with a second insertion hole, the adjusting rod and the elastic member are arranged in the inner tube, one end of the adjusting rod is used for plug-in cooperation with the first insertion hole and the adjusting hole, the other end of the adjusting rod extends out of the second insertion hole, the adjusting rod is connected with the tube wall of the inner tube through the elastic member, and under the elastic force of the elastic member, the adjusting rod extends out of the first insertion hole and the adjusting hole in turn at the end away from the second insertion hole; the outer tube in the longitudinal rod is connected with the base, the inner tube in the longitudinal rod is connected with the inner tube in the transverse rod, the outer tube in the transverse rod is connected with the outer tube in the vertical rod, and the inner tube in the vertical rod is provided with the pressing mechanism.

[0012] Further, the weighing mechanism comprises a weighing sensor and a weighing disc, the weighing disc is connected with the upper end of the supporting seat through the weighing sensor, and the weighing sensor is electrically connected with the control mechanism.

[0013] Further, the pressing mechanism comprises a pressing branch rod, a clamp hoop and a telescopic rod, one end of the pressing branch rod is connected with the upper end of the vertical rod, the other end of the pressing branch rod is provided with the clamp hoop, the clamp hoop is connected with the telescopic rod, the telescopic rod is electrically connected with the control mechanism, and the control mechanism controls the output end of the telescopic rod to press the stop button of the screw extruder according to the weight measured by the weighing sensor.

[0014] Further, the pressing mechanism further comprises a ball seat and a ball, the ball seat is arranged at the upper end of the vertical rod, the ball seat is provided with a ball groove, the ball groove is provided with the ball, and the ball is provided with the pressing branch rod.

[0015] Further, the punch, the conveying mechanism and the unloading mechanism are further included; the conveying mechanism is arranged between the punch and the weighing mechanism, and comprises a conveying support and a conveyor, and the frame of the conveyor is slidably connected with the upper end of the conveying support along the direction close to or away from the weighing mechanism; the unloading mechanism comprises a linkage rod, a first rack, a gear, a second rack, an unloading support rod and an unloading frame, the linkage rod is vertically slidably connected with the frame of the conveyor, the upper end of the linkage rod is provided with the first rack, the first rack is slidably connected with the supporting seat, the gear is engaged with the upper portion of the first rack and is rotatably connected with the supporting seat, the second rack is engaged with the upper portion of the gear, the unloading support rod is arranged on the second rack and is slidably connected with the supporting seat, and the unloading frame is arranged on the unloading support rod and is arranged above the weighing mechanism, and the unloading frame is used for pushing the blank on the weighing mechanism to the conveyor.

[0016] Further, the auxiliary mechanism is further included, and the auxiliary mechanism comprises a switch support, a normally open travel switch, a gas supply device and a spray pipe, the switch support is arranged on the supporting seat, the normally open travel switch is arranged on the switch support, the swing rod of the normally open travel switch is slidably abutted with the lower surface of the first rack, the lower end of the unloading frame is provided with the spray pipe, the spray pipe is provided with a long strip spray opening at the lower end of the side of the interior of the unloading frame, the spray pipe is connected with the gas supply device through a gas pipe, and the normally open travel switch and the gas supply device are electrically connected with the control mechanism, when the first rack presses the swing rod of the normally open travel switch, the control mechanism controls the gas supply device to provide compressed air for the spray pipe.

[0017] Compared with the prior art, the application has the following beneficial effects:

[0018] 1、In the application, the supporting mechanism is used for supporting the weighing mechanism, the pressing mechanism and the control mechanism, the weighing mechanism is used for weighing the weight of the blank extruded from the discharge port of the screw extruder and transmitting the weight signal to the control mechanism, and the control mechanism is used for controlling the pressing mechanism to press the stop button of the screw extruder according to the weight weighed by the weighing mechanism. After the weighing of the blank is completed, the worker does not need to manually press the stop button of the screw extruder to shut down the screw extruder, and the control mechanism can automatically press the stop button to shut down, so that the operation is more timely and rapid, and it is beneficial to reduce the excess blank and save resources.

[0019] 2、The device does not need to be modified on the existing screw extruder, and can be directly placed near the discharge port of the screw extruder, and is not limited to be used on a certain screw extruder, and is flexible to use.

[0020] 3. By setting a lifting rod on the base and setting a cavity covering the lifting rod on the lower surface of the support, the support and the weighing mechanism on the support can be raised when the output end of the telescopic rod extends, and the support and the weighing mechanism on the support can be lowered when the output end of the telescopic rod retracts. This allows the height of the weighing mechanism to be flexibly adjusted to adapt to the discharge port height of different screw extruders, thus improving adaptability and operational flexibility.

[0021] 4. Unexpectedly, if the height of the weighing mechanism cannot be increased, the distance between the weighing mechanism and the discharge port, which is relatively high, will increase when the screw extruder is shut down. This results in excess material remaining between the discharge port and the weighing mechanism (material that has not yet fallen onto the weighing mechanism). The greater the distance between the weighing mechanism and the discharge port, the more excess material is wasted. Therefore, by installing a lifting rod, the distance between the weighing mechanism and the discharge port can be reduced when facing a higher discharge port, further reducing the waste of excess material and contributing to resource conservation.

[0022] 5. By using a telescopic rod for the longitudinal rod, the longitudinal position of the pressing mechanism can be adjusted; by using a telescopic rod for the transverse rod, the transverse position of the pressing mechanism can be adjusted; by using a telescopic rod for the vertical rod, the vertical height of the pressing mechanism can be adjusted. This allows for convenient adjustment of the longitudinal, transverse, and vertical positions of the pressing mechanism, facilitating flexible adaptation to the position of the screw extruder's stop button and further improving the adaptability and operational flexibility of the device.

[0023] 6. In this invention, the telescopic rod structure used for the longitudinal rod, transverse rod, and vertical rod is a purely mechanical mechanism, which is convenient for inspection and maintenance, easy to operate, and helps to improve adjustment and maintenance efficiency.

[0024] 7. In this invention, the unloading mechanism and the conveying mechanism eliminate the need for workers to manually unload and transport materials, which helps to reduce the labor intensity of workers.

[0025] 8. The conveying mechanism and the unloading mechanism can be linked. When the conveying mechanism approaches the weighing mechanism, the unloading mechanism can unload the material blank weighed on the weighing mechanism onto the conveying mechanism. When the conveying mechanism moves away from the weighing mechanism, the conveying mechanism moves above the lower die of the stamping machine, and the unloading mechanism resets. Thus, there is no need for workers to manually push the unloading mechanism to unload, which helps to reduce the labor intensity of workers. There is also no need to set up a separate power source to drive the unloading mechanism to unload, which helps to save energy and further facilitates maintenance.

[0026] 9. When the conveying mechanism is close to the weighing mechanism, and the discharging mechanism discharges the billets on the weighing mechanism to the conveying mechanism, the nozzle sprays compressed air from the long strip-shaped nozzle, the compressed air sprayed from the long strip-shaped nozzle forms an air knife, the air knife separates the billets from the upper surface of the weighing disc in the weighing mechanism, prevents the billets from adhering to the upper surface of the weighing disc, thereby helping the discharging mechanism to discharge, reducing the risk of incomplete discharge, reducing waste of billets, and further saving resources.

[0027] 10. The nozzle sprays compressed air from the long strip-shaped nozzle, which does not need to be operated by workers alone, and can be started when the conveying mechanism is close to the weighing mechanism, so the response is quick and labor operation is saved.

[0028] 11. Unexpectedly, when the discharging frame in the discharging mechanism pushes the billets on the weighing disc to discharge, because the nozzle can spray compressed air from the long strip-shaped nozzle, it can prevent the billets from blocking the long strip-shaped nozzle of the nozzle, realize self-cleaning of the long strip-shaped nozzle by the nozzle, without additional maintenance, and reduce maintenance intensity.

[0029] 12. Also unexpectedly, because the compressed air sprayed from the long strip-shaped nozzle of the nozzle can form an air knife, and the long strip-shaped nozzle is arranged at the lower end of the side of the nozzle facing the inside of the discharging frame, the air knife not only separates the billets from the upper surface of the weighing disc, but also cleans the upper surface of the weighing disc, which is conducive to further reducing the maintenance intensity. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 Partial structure perspective of an automatic stop discharging device of a screw extruder Figure 1 ;

[0031] Figure 2 Partial structure perspective of an automatic stop discharging device of a screw extruder Figure 2 ;

[0032] Figure 3 Partial structure perspective of an automatic stop discharging device of a screw extruder Figure 3 ;

[0033] Figure 4 Perspective of an automatic stop discharging device of a screw extruder Figure 1 ;

[0034] Figure 5 Perspective of an automatic stop discharging device of a screw extruder Figure 2 ;

[0035] Figure 6 Partial enlarged view of A in Figure 5 ;

[0036] Figure 7Perspective view of an automatic stop discharge device for a screw extruder Figure 3 ;

[0037] Figure 8 For Figure 7 partial enlarged view at B in the middle;

[0038] Figure 9 Front view of an automatic stop discharge device for a screw extruder

[0039] Figure 10 For Figure 9 partial enlarged view at C in the middle;

[0040] Figure 11 Perspective view of an automatic stop discharge device for a screw extruder Figure 4 ;

[0041] Figure 12 For Figure 11 partial enlarged view at D in the middle;

[0042] Figure 13 Perspective view of a screw extruder Figure 1 ;

[0043] Figure 14 Perspective view of a screw extruder Figure 2 ;

[0044] Figure 15 Use diagram of an automatic stop discharge device for a screw extruder Figure 1 ;

[0045] Figure 16 Use diagram of an automatic stop discharge device for a screw extruder Figure 2 .

[0046] In the figure:

[0047] DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0049] Embodiment 1:

[0050] As Figures 1-16As shown in the figure, an automatic stop discharging device of a screw extruder comprises a supporting mechanism, a weighing mechanism, a pressing mechanism, and a control mechanism 4. The supporting mechanism is used to support the weighing mechanism, the pressing mechanism, and the control mechanism 4. The weighing mechanism is used to weigh the weight of the material extruded from the discharge port 51 of the screw extruder 5 and transmit the weight signal to the control mechanism 4. The control mechanism 4 is used to control the pressing mechanism to press the stop button 52 of the screw extruder 5 according to the weight weighed by the weighing mechanism.

[0051] As shown in the figure, Figure 1 and Figure 3 the supporting mechanism comprises a base 11, a supporting seat 12, a longitudinal rod 13, a transverse rod 14, and a vertical rod 15. The upper surface of the base 11 is provided with the supporting seat 12, the upper end of the supporting seat 12 is provided with the weighing mechanism, and the side surface of the supporting seat 12 is provided with the control mechanism 4. One side of the base 11 is provided with the longitudinal rod 13 extending in the longitudinal direction, the longitudinal rod 13 is provided with the transverse rod 14 extending in the transverse direction at the end away from the base 11, the transverse rod 14 is provided with the vertical rod 15 extending upward at the end away from the longitudinal rod 13, and the upper end of the vertical rod 15 is provided with the pressing mechanism.

[0052] As shown in the figure, Figure 3 the weighing mechanism comprises a weighing sensor 21 and a weighing disc 22. The weighing disc 22 is connected to the upper end of the supporting seat 12 through the weighing sensor 21, and the weighing sensor 21 is electrically connected to the control mechanism 4.

[0053] As shown in the figure, Figure 2 the pressing mechanism comprises a pressing rod 31, a clamp 32, and a telescopic rod 33. One end of the pressing rod 31 is connected to the upper end of the vertical rod 15, the other end of the pressing rod 31 is provided with the clamp 32, the clamp 32 is connected to the telescopic rod 33, the telescopic rod 33 can adopt an electric push rod or an oil cylinder or an air cylinder, in this embodiment, the telescopic rod 33 adopts an electric push rod, and the telescopic rod 33 is electrically connected to the control mechanism 4.

[0054] The material blank extruded from the discharge port 51 of the screw extruder 5 falls on the weighing disc 22, the weighing sensor 21 transmits the weighed weight signal to the control mechanism 4, the control mechanism 4 compares the weight signal with the set weight, the initial weight signal is less than the set weight, as the weight of the material blank on the weighing disc 22 increases, when the weight signal is greater than or equal to the set weight, the control mechanism 4 controls the output end of the telescopic rod 33 to make an extension and a retraction action, the extension action of the output end of the telescopic rod 33 can press the stop button 52 of the screw extruder 5, so as to stop the screw extruder 5 in time to continue discharging, the retraction action of the output end of the telescopic rod 33 can reset the output end of the telescopic rod 33, so as to facilitate the next extension to press the stop button 52. After the weighing is completed, the worker carries the material blank on the weighing disc 22 to the punch machine for punch forming. When it is needed to continue discharging the screw extruder 5, the worker manually presses the start button (not shown in the figure) of the screw extruder 5.

[0055] Through the above process, it can be known that after the weighing of the material blank is completed, the worker does not need to manually press the stop button 52 of the screw extruder 5 to shut down the screw extruder 5, the control mechanism 4 can automatically press the stop button 52 to shut down, the shut-down operation is more timely and rapid, which is beneficial to reduce the excess material blank and save resources.

[0056] Moreover, the device does not need to be modified to the existing screw extruder 5, and can be directly placed near the discharge port 51 of the screw extruder 5, and is not limited to be used on a certain screw extruder 5, and is more flexible to use.

[0057] Further, as shown in Figure 2 In order to be able to adjust the inclination angle of the telescopic rod 33, the pressing mechanism further comprises a ball seat 34 and a ball 35. The ball seat 34 is arranged at the upper end of the vertical rod 15, the ball seat 34 is provided with a ball groove (not shown in the figure), the ball 35 is arranged in the ball groove, and the ball 35 is provided with the pressing branch rod 31.

[0058] When it is needed to adjust the inclination angle of the telescopic rod 33, the worker needs to forcibly move the pressing branch rod 31, and forcibly rotates the ball 35 in the ball groove, so as to change the angle of the ball 35 in the ball groove, and in turn change the inclination angle of the telescopic rod 33, after the adjustment is completed, the worker directly takes away the hand from the pressing branch rod 31, and the friction force between the ball 35 and the ball groove is utilized to maintain the angle of the ball 35, the pressing branch rod 31 and the telescopic rod 33.

[0059] In order to improve the stability of the ball 35 in the ball groove, a fastening bolt (not shown in the figure) is arranged outside the ball seat 34, the fastening bolt is screwed with the ball 35, one end of the fastening bolt extends into the ball groove and abuts against the surface of the ball 35. When it is needed to rotate the ball 35 to adjust the angle, the fastening bolt can be screwed outward; when it is needed to fix the state of the ball 35 in the ball groove, the fastening bolt can be screwed into the ball groove, and the ball 35 is abutted against the groove wall of the ball groove by the fastening bolt to maintain the stability of the ball 35.

[0060] In order to further improve the reliability of the threaded connection between the fastening bolt and the ball 35, self-locking threads can be used, which are prior art and will not be described here.

[0061] Embodiment 2:

[0062] This embodiment 2 is further improved on the basis of embodiment 1:

[0063] As shown in Figure 1 in order to adapt to the height of the discharge port 51 of different screw extruders 5. A cavity (not shown in the figure) is arranged on the lower surface of the supporting seat 12, and a lifting rod 111 is arranged on the upper surface of the base 11, which can be an oil cylinder or an air cylinder. The lifting rod 111 is arranged in the cavity, and the output end of the lifting rod 111 is connected with the cavity wall.

[0064] When the output end of the lifting rod 111 extends upward, the output end of the lifting rod 111 lifts the supporting seat 12 upward, and the height of the weighing mechanism located at the upper end of the supporting seat 12 is raised, so that the weighing mechanism can adapt to the discharge port 51 of the screw extruder 5 with higher height.

[0065] If the height of the weighing mechanism cannot be raised, when facing the discharge port 51 with higher height, the distance between the weighing mechanism and the discharge port 51 will be increased, so that the material blank (the material blank that has not fallen onto the weighing mechanism) between the discharge port 51 and the weighing mechanism is redundant material blank when the screw extruder 5 is shut down. The greater the distance between the weighing mechanism and the discharge port 51, the more the redundant material blank, and the more the material waste is increased. Therefore, by arranging the lifting rod 111, when facing the discharge port 51 with higher height, the distance between the weighing mechanism and the discharge port 51 can be reduced, so as to reduce the waste of redundant material blank, which is beneficial to save resources.

[0066] When the output end of the lifting rod 111 is retracted, the supporting seat 12 falls with the output end of the lifting rod 111, and the height of the weighing mechanism on the upper end of the supporting seat 12 is lowered to adapt to the height of the discharge port 51 of the screw extruder 5. If the height of the weighing mechanism cannot be adjusted to face the discharge port 51 of lower height, the weighing mechanism cannot smoothly receive the material blank from the discharge port 51. Therefore, by setting the lifting rod 111, the height of the weighing mechanism can be adjusted to adapt to the discharge port 51 of different heights, and the adaptability and use flexibility are improved.

[0067] Embodiment 3:

[0068] This embodiment 3 is further improved on the basis of embodiment 1:

[0069] As shown in Figure 1 In order to flexibly adjust the position of the pressing mechanism in the longitudinal direction, the lateral direction and the vertical direction, the longitudinal rod 13, the lateral rod 14 and the vertical rod 15 all adopt a telescopic structure.

[0070] As shown in Figure 1 The telescopic structure includes an outer tube 16, an inner tube 17, an adjusting rod 18 and elastic members (not shown in the figure). The tube wall of the outer tube 16 is provided with a plurality of adjusting holes 161, one end of the inner tube 17 is inserted into the outer tube 16, the tube wall of the end of the inner tube 17 inserted into the outer tube 16 is provided with a first insertion hole (not shown in the figure), the tube wall of the end of the inner tube 17 outside the outer tube 16 is provided with a second insertion hole 171, the inner tube 17 is provided with the adjusting rod 18 and a plurality of elastic members, one end of the adjusting rod 18 is used for insertion into the first insertion hole and the adjusting hole 161, the other end of the adjusting rod 18 extends out of the second insertion hole 171, the adjusting rod 18 is connected with the tube wall of the inner tube 17 through the elastic members, the elastic members are arranged at the end of the adjusting rod 18 close to the second insertion hole 171, and the elastic members can adopt springs. Under the elastic force of the elastic members, the end of the adjusting rod 18 away from the second insertion hole 171 extends out of the first insertion hole and the adjusting hole 161 in turn.

[0071] When the telescopic structure needs to be extended, the following operations are required: (1) The worker presses the part of the adjusting rod 18 that extends out of the second insertion hole 171, so that the adjusting rod 18 overcomes the elastic force of the elastic element and moves into the inner tube 17, so that the end of the adjusting rod 18 away from the second insertion hole 171 exits from the adjusting hole 161 of the outer tube 16, so that the inner tube 17 can slide in the outer tube 16; (2) The worker pulls the inner tube 17 outward, so that the length of the inner tube 17 exposed outside the outer tube 16 increases, so that the overall length of the telescopic structure increases; (3) The worker releases the pressure on the adjusting rod 18, and the adjusting rod 18 resets under the action of the elastic force of the elastic element, so that the end of the adjusting rod 18 away from the second insertion hole 171 extends out from the first insertion hole and the new adjusting hole 161 in sequence, so that the relative position of the inner tube 17 and the outer tube 16 is fixed, so that the overall length of the telescopic structure is locked, thereby completing the adjustment of the telescopic structure extension.

[0072] When it is necessary to shorten the telescopic structure, the following actions are required: (1) The worker presses the part of the adjusting rod 18 that extends out of the second insertion hole 171, so that the adjusting rod 18 overcomes the elastic force of the elastic element and moves into the inner tube 17, so that the end of the adjusting rod 18 away from the second insertion hole 171 exits from the adjusting hole 161 of the outer tube 16, so that the inner tube 17 can slide in the outer tube 16; (2) The worker pushes the inner tube 17 into the outer tube 16, so that the length of the inner tube 17 exposed outside the outer tube 16 is reduced, so that the overall length of the telescopic structure is reduced; (3) The worker releases the pressure on the adjusting rod 18, and the adjusting rod 18 resets under the action of the elastic force of the elastic element, so that the end of the adjusting rod 18 away from the second insertion hole 171 extends out from the first insertion hole and the new adjusting hole 161 in sequence, so that the relative position of the inner tube 17 and the outer tube 16 is fixed, so that the overall length of the telescopic structure is locked, thereby completing the adjustment of shortening the telescopic structure.

[0073] like Figure 1 As shown, the outer tube 16 in the longitudinal rod 13 is connected to the base 11, the inner tube 17 in the longitudinal rod 13 is connected to the inner tube 17 in the transverse rod 14, the outer tube 16 in the transverse rod 14 is connected to the outer tube 16 in the vertical rod 15, and the inner tube 17 in the vertical rod 15 is provided with a pressing mechanism.

[0074] As can be seen from the above description, by adopting a telescopic structure for the longitudinal rod 13, the longitudinal position of the pressing mechanism can be adjusted; by adopting a telescopic structure for the transverse rod 14, the transverse position of the pressing mechanism can be adjusted; and by adopting a telescopic structure for the vertical rod 15, the vertical height of the pressing mechanism can be adjusted. Thus, it is convenient to adjust the longitudinal, transverse, and vertical positions of the pressing mechanism to flexibly adapt to the position of the stop button 52 of the screw extruder 5, thereby improving the adaptability and flexibility of use of this device.

[0075] And, in this embodiment, the telescopic structure adopted by the longitudinal rod 13, the transverse rod 14 and the vertical rod 15 is a pure mechanical mechanism, which is convenient for maintenance and operation, and is conducive to improving the adjustment efficiency and maintenance efficiency.

[0076] Embodiment 4:

[0077] This embodiment 4 is further improved on the basis of embodiment 1:

[0078] As shown in Figure 15 , the automatic stopping discharging device of the screw extruder of this embodiment further comprises a punch, a conveying mechanism and a discharging mechanism. The punch is used for punching and forming the billet extruded by the screw extruder 5. The discharging mechanism is used for discharging the billet on the weighing mechanism to the conveying mechanism, and the conveying mechanism is used for conveying the billet to the punch.

[0079] As shown in Figure 15 , the punch comprises a punch support 61, a lower die 62, a hydraulic cylinder 63, a punch head 64 and an upper die 65. The lower die 62 is arranged at the lower part of the punch support 61, the hydraulic cylinder 63 is arranged at the upper part of the punch support 61, the output end of the hydraulic cylinder 63 is provided with the punch head 64, and the lower surface of the punch head 64 is provided with the upper die 65. When the output end of the hydraulic cylinder 63 extends, the punch head 64 drives the upper die 65 to move downward, and the upper die 65 can punch the billet in the lower die 62.

[0080] As shown in Figure 15 and Figure 11 , the conveying mechanism is arranged between the punch and the weighing mechanism. The conveying mechanism comprises a conveying support 71 and a conveyor 72. The conveying support 71 is arranged on the ground, and the conveyor 72 can adopt a belt conveyor. The rack 721 of the conveyor 72 is horizontally and slidably connected to the upper end of the conveying support 71, and the rack 721 of the conveyor 72 slides along the direction close to or away from the weighing mechanism.

[0081] As shown in Figure 15 , the sliding of the conveyor 72 can be realized by using a connecting rod 73. The upper end of the connecting rod 73 is rotationally connected to the punch head 64, and the lower end of the connecting rod 73 is rotationally connected to the rack 721 of the conveyor 72. When the punch head 64 moves downward, the connecting rod 73 pushes the rack 721 of the conveyor 72, so that the conveyor 72 as a whole moves to the direction close to the weighing mechanism, so as to receive the billet discharged from the weighing mechanism. When the punch head 64 moves upward, the connecting rod 73 pulls the rack 721 of the conveyor 72, so that the conveyor 72 as a whole moves to the direction away from the weighing mechanism, so that the conveyor 72 can move above the lower die 62, so as to convey the billet to the lower die 62.

[0082] In addition to using the connecting rod 73, an oil cylinder (not shown in the figure) can also be installed on the conveying bracket 71, the cylinder barrel of the oil cylinder is fixed on the conveying bracket 71, and the output end of the oil cylinder is connected with the rack 721 of the conveyor 72. When the output end of the oil cylinder is extended, the conveyor 72 approaches the weighing mechanism; when the output end of the oil cylinder is retracted, the conveyor 72 approaches the lower mold 62 (i.e. away from the weighing mechanism).

[0083] As shown in Figure 3 , the unloading mechanism includes a linkage rod 81, a first rack 82, a gear 83, a second rack 84, an unloading support rod 85, and an unloading frame 86. As shown in Figure 12 , the rack 721 of the conveyor 72 is provided with a sliding cylinder 7211, the linkage rod 81 is vertically inserted into the sliding cylinder 7211, and the linkage rod 81 can vertically slide in the sliding cylinder 7211, so as to allow the rack 721 of the conveyor 72 to drive the linkage rod 81 to move horizontally together, and also allow the unloading mechanism as a whole to ascend and descend with the support seat 12. As shown in Figure 3 , the upper end of the linkage rod 81 is connected with the first rack 82, and the side wall of the support seat 12 is provided with a first sliding rail 121, and the first rack 82 is in sliding fit with the first sliding rail 121. The upper portion of the first rack 82 is engaged with the gear 83, and the gear 83 is rotationally connected with the support seat 12. The upper portion of the gear 83 is engaged with the second rack 84, and the second rack 84 is provided with the unloading support rod 85, and the side wall of the support seat 12 is provided with a second sliding rail 122, and the unloading support rod 85 is in sliding fit with the second sliding rail 122. The unloading support rod 85 is provided with the unloading frame 86, and the unloading frame 86 is arranged above the weighing disc 22 in the weighing mechanism, and the unloading frame 86 is used to push the billets on the weighing mechanism to the conveyor 72.

[0084] When the conveyor 72 approaches the weighing mechanism, the sliding cylinder 7211 on the rack 721 of the conveyor 72 pushes the linkage rod 81 to move together, the linkage rod 81 pushes the first rack 82 to approach the screw extruder 5, through the reversing of the gear 83, the second rack 84 drives the linkage rod 81 to move to the side close to the conveyor 72, the linkage rod 81 drives the unloading frame 86 to move to the side close to the conveyor 72, and the unloading frame 86 pushes the billets on the weighing disc 22 in the weighing mechanism to the conveyor 72.

[0085] When the conveyor 72 moves away from the weighing mechanism, the sliding cylinder 7211 on the rack 721 of the conveyor 72 drives the linkage rod 81 to move together, the linkage rod 81 drives the first rack 82 to move away from the screw extruder 5, through the reversing transmission of the gear 83, the second rack 84 drives the linkage rod 81 to move to the direction close to the screw extruder 5, the linkage rod 81 drives the unloading frame 86 to move to the direction close to the screw extruder 5, so that the unloading frame 86 is reset to be directly above the weighing disc 22 of the weighing mechanism.

[0086] As can be seen from the above introduction, the setting of unloading and conveying mechanisms can eliminate the need for workers to unload and transport materials manually, which helps to reduce the labor intensity of workers.

[0087] Furthermore, the conveying mechanism and the unloading mechanism can be linked. When the conveying mechanism approaches the weighing mechanism, the unloading mechanism can unload the weighed blank from the weighing mechanism onto the conveying mechanism. When the conveying mechanism moves away from the weighing mechanism, the conveying mechanism moves above the lower die 62 of the stamping machine, and the unloading mechanism resets. Thus, there is no need for workers to manually push the unloading mechanism to unload, which helps reduce the labor intensity of workers. There is also no need to set up a separate power source to drive the unloading mechanism to unload, which helps save energy and facilitates maintenance.

[0088] Furthermore, such as Figure 3 As shown, in order to guide the material blank and prevent it from falling to the ground, a guide plate 123 is installed at the upper end of the support 12, which allows the material blank to fall from the weighing pan 22 onto the guide plate 123 and then slide from the guide plate 123 onto the conveyor 72.

[0089] Example 5:

[0090] This embodiment 5 is an improvement upon embodiment 4:

[0091] like Figures 7-10 As shown in the figure, an automatic stop discharge device for a screw extruder according to this embodiment also includes an auxiliary mechanism. The auxiliary mechanism includes a switch bracket 91, a normally open limit switch 92, an air supply device (not shown in the figure), and a nozzle 94.

[0092] like Figure 8 As shown, a switch bracket 91 is provided on the lower surface of the first slide rail 121 of the support 12. A normally open limit switch 92 is provided on the switch bracket 91. The upper end of the normally open limit switch 92 is provided with a rocker arm 921 and a contact 922. Under normal conditions, the rocker arm 921 is away from the contact 922, and the normally open limit switch 92 is in the open state. When the rocker arm 921 is pressed down, the rocker arm 921 presses down the contact 922, and the normally open limit switch 92 is closed. The normally open limit switch 92 is a common product on the market. The normally open limit switch 92 is electrically connected to the control mechanism 4. When the normally open limit switch 92 is closed, it transmits a closing signal to the control mechanism 4.

[0093] like Figure 8 As shown, the swing arm 921 of the normally open limit switch 92 slides against the lower surface of the first rack 82. When the conveying mechanism approaches the weighing mechanism, the conveying mechanism drives the linkage rod 81, and the linkage rod 81 drives the first rack 82 to approach the screw extruder 5. During this process, the lower surface of the first rack 82 slides against the swing arm 921 of the normally open limit switch 92, so that the swing arm 921 keeps pressing the contact 922, thereby keeping the normally open limit switch 92 closed.

[0094] As Figure 6 and Figure 7 shown, the lower end of the discharge frame 86 is provided with a spray pipe 94, the spray pipe 94 is provided with a long strip spray port 941 at the lower end of the side facing the interior of the discharge frame 86, the spray pipe 94 is connected with a gas supply device through the air pipe 93, the gas supply device is used to provide compressed air for the spray pipe 94. The gas supply device can include an air compressor and an air tank, the air compressor is connected with the air inlet end of the air tank through a pipeline, the air compressor is used to compress the gas supply, the air tank is used to store compressed air, the air outlet end of the air tank is connected with the spray pipe 94 through the air pipe 93, an electromagnetic valve is installed on the air pipe 93, and the electromagnetic valve is electrically connected with the control mechanism 4. When the first rack 82 presses the swing rod 921 of the normally open travel switch 92, the control mechanism 4 controls the opening of the electromagnetic valve to provide compressed air for the spray pipe 94, and the compressed air is sprayed from the long strip spray port 941 of the spray pipe 94.

[0095] As introduced above, when the conveying mechanism approaches the weighing mechanism, and the discharge mechanism discharges the blank on the weighing mechanism to the conveying mechanism, the spray pipe 94 sprays compressed air from the long strip spray port 941, the compressed air sprayed from the long strip spray port 941 forms an air knife, the air knife separates the blank from the upper surface of the weighing disc 22 in the weighing mechanism, prevents the blank from adhering to the upper surface of the weighing disc 22, thereby helping the discharge mechanism to discharge, reducing the risk of incomplete discharge, reducing blank waste, and further saving resources.

[0096] Moreover, the action of the spray pipe 94 spraying compressed air from the long strip spray port 941 does not need to be operated by workers alone, and can be started when the conveying mechanism approaches the weighing mechanism, so the reaction is quick and manual operation is saved.

[0097] Unexpectedly, when the discharge frame 86 in the discharge mechanism pushes the blank on the weighing disc 22 to discharge, because the spray pipe 94 can spray compressed air from the long strip spray port 941, the blank can be prevented from blocking the long strip spray port 941 of the spray pipe 94, the self-cleaning of the long strip spray port 941 by the spray pipe 94 is realized, no additional maintenance is needed, and the maintenance intensity is reduced.

[0098] Further unexpectedly, because the compressed air sprayed from the long strip spray port 941 of the spray pipe 94 can form an air knife, and the long strip spray port 941 is arranged at the lower end of the side of the spray pipe 94 facing the interior of the discharge frame 86, the air knife not only can separate the blank and the upper surface of the weighing disc 22, but also can clean the upper surface of the weighing disc 22, which is conducive to further reducing the maintenance intensity.

[0099] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application belong to the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. An automatic stop discharge device of a screw extruder comprising a weighing mechanism for weighing the weight of a parison extruded from a discharge port of the screw extruder, characterized in that, The support mechanism, the pressing mechanism and the control mechanism are further included, the weighing mechanism, the pressing mechanism and the control mechanism are arranged on the support mechanism, the control mechanism controls the pressing mechanism to press the stop button of the screw extruder according to the weight measured by the weighing mechanism; The support mechanism includes a base, a supporting seat, a longitudinal rod, a transverse rod and a vertical rod, the upper surface of the base is provided with the supporting seat, the upper end of the supporting seat is provided with the weighing mechanism, the side surface of the supporting seat is provided with the control mechanism, one side of the base is provided with the longitudinal rod extending in the longitudinal direction, the end of the longitudinal rod away from the base is provided with the transverse rod extending in the transverse direction, the end of the transverse rod away from the longitudinal rod is provided with the vertical rod extending upward, and the upper end of the vertical rod is provided with the pressing mechanism; The stamping machine, the conveying mechanism and the unloading mechanism are further included. The conveying mechanism is arranged between the stamping machine and the weighing mechanism, and includes a conveying support and a conveyor, and the frame of the conveyor is slidably connected with the upper end of the conveying support along the direction close to or away from the weighing mechanism. The unloading mechanism includes a linkage rod, a first rack, a gear, a second rack, an unloading support rod and an unloading frame, the frame of the conveyor is vertically slidably connected with the linkage rod, the upper end of the linkage rod is provided with the first rack, the first rack is slidably connected with the supporting seat, the upper end of the first rack is engaged with the gear, the gear is rotatably connected with the supporting seat, the upper end of the gear is engaged with the second rack, the second rack is provided with the unloading support rod, the unloading support rod is slidably connected with the supporting seat, the unloading support rod is provided with the unloading frame, and the unloading frame is arranged above the weighing mechanism and used for pushing the blank on the weighing mechanism to the conveyor. The auxiliary mechanism is further included, and the auxiliary mechanism includes a switch support, a normally open travel switch, a gas supply device and a spray pipe, the switch support is arranged on the supporting seat, the normally open travel switch is arranged on the switch support, the swing rod of the normally open travel switch is slidably abutted against the lower surface of the first rack, the lower end of the unloading frame is provided with the spray pipe, the spray pipe is provided with a long strip-shaped nozzle at the lower end of the side of the interior of the unloading frame, the spray pipe is connected with the gas supply device through a gas pipe, and the normally open travel switch and the gas supply device are electrically connected with the control mechanism, so that when the first rack presses the swing rod of the normally open travel switch, the control mechanism controls the gas supply device to provide compressed air for the spray pipe.

2. A device for automatic stoppage of discharge of a screw extruder according to claim 1, characterized in that The lower surface of the supporting seat is provided with a cavity, the upper surface of the base is provided with a lifting rod, the lifting rod is arranged in the cavity, and the output end of the lifting rod is connected with the cavity wall.

3. A device for automatic stoppage of discharge of a screw extruder as claimed in claim 1, wherein, The longitudinal rod, the transverse rod and the vertical rod all adopt a telescopic structure.

4. A device for automatic stoppage of discharge of a screw extruder according to claim 3, characterized in that The telescopic structure includes an outer tube, an inner tube, an adjusting rod and an elastic member, the tube wall of the outer tube is provided with a plurality of adjusting holes, one end of the inner tube is insertedly connected with the outer tube, the tube wall of the one end of the inner tube inserted into the outer tube is provided with a first insertion hole, the tube wall of the one end of the inner tube located outside the outer tube is provided with a second insertion hole, the adjusting rod and the elastic member are arranged in the inner tube, one end of the adjusting rod is used for being insertedly connected with the first insertion hole and the adjusting hole, the other end of the adjusting rod extends out of the second insertion hole, the adjusting rod is connected with the tube wall of the inner tube through the elastic member, and under the elastic force of the elastic member, the adjusting rod extends out of the first insertion hole and the adjusting hole in sequence at the end away from the second insertion hole. The outer tube in the longitudinal rod is connected with the base, the inner tube in the longitudinal rod is connected with the inner tube in the transverse rod, the outer tube in the transverse rod is connected with the outer tube in the vertical rod, and the inner tube in the vertical rod is provided with the pressing mechanism.

5. A device for automatic stoppage of discharge of a screw extruder as claimed in claim 1, wherein, The weighing mechanism comprises a weighing sensor and a weighing disc, the weighing disc is connected with the upper end of the supporting seat through the weighing sensor, and the weighing sensor is electrically connected with the control mechanism.

6. A device for automatic stoppage of discharge of a screw extruder according to claim 5, characterized in that The pressing mechanism comprises a pressing support rod, a clamp, and a telescopic rod, one end of the pressing support rod is connected with the upper end of the vertical rod, the other end of the pressing support rod is provided with the clamp, the clamp is connected with the telescopic rod, the telescopic rod is electrically connected with the control mechanism, and the control mechanism controls the output end of the telescopic rod to press the stop button of the screw extruder according to the weight measured by the weighing sensor.

7. A device for automatic stoppage of discharge of a screw extruder according to claim 6, characterized in that The pressing mechanism further comprises a ball seat and a ball, the ball seat is arranged at the upper end of the vertical rod, a ball groove is arranged on the ball seat, the ball groove is provided with the ball, and the pressing support rod is arranged on the ball.

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