Resistance sorting device for PTC (Positive Temperature Coefficient) ceramic heating sheet production

Abstract

The invention discloses a resistance sorting device for PTC (Positive Temperature Coefficient) ceramic heating sheet production, which comprises a third material conveying device for conveying PTC ceramic heating sheets of which the resistance test is completed; the fourth material conveying devices are sequentially arranged at intervals in the conveying direction of the third material conveying device, and the conveying direction of the fourth material conveying devices is perpendicular to the conveying direction of the third material conveying device; and the plurality of first push blocks are arranged in one-to-one correspondence with the fourth material conveying devices and are used for pushing the PTC ceramic heating sheets belonging to the same resistance value range from the third material conveying device to the corresponding fourth material conveying devices. According to the resistance value sorting device, through cooperative work of all the components, automatic sorting and filing can be conducted according to the measured resistance values in the PTC ceramic heating piece production process, the PTC ceramic heating pieces belonging to the same resistance value range are classified into the same grade, and compared with current manual sorting and filing, the labor cost can be reduced, and the sorting efficiency can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of ceramic heating sheet production, and particularly to a resistance sorting device for PTC ceramic heating sheet production. Background Art

[0002] A PTC ceramic heating sheet is a heating element made of a ceramic material based on the positive temperature coefficient (PTC) effect. Its core characteristic is that the resistance increases significantly with the increase in temperature, thus having an automatic temperature control function.

[0003] After the PTC ceramic heating sheet is made, it is necessary to detect its performance parameters and sort and classify them. For a long time, the resistance detection of PTC ceramic heating sheets mainly relies on manual detection. The detection personnel hold the instrument to power on each PTC ceramic heating sheet one by one, calculate the resistance value by measuring the current, and after detection, it is also necessary to manually sort and file the PTC ceramic heating sheets according to the resistance value. The degree of automation of the whole process is low. Manual detection and classification one by one require a large amount of manpower and high labor intensity, which are difficult to meet the needs of large-scale production and seriously restrict the improvement of production efficiency. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a resistance sorting device for PTC ceramic heating sheet production, so as to improve the automation level of sorting and filing after resistance value detection in the production process of PTC ceramic heating sheets.

[0005] The technical solution adopted by the present invention to solve its technical problems is: providing a resistance sorting device for PTC ceramic heating sheet production, which includes:

[0006] A third material conveying device for conveying the PTC ceramic heating sheets that have completed the resistance test;

[0007] A plurality of fourth material conveying devices are arranged at intervals in sequence along the conveying direction of the third material conveying device, and the conveying direction is perpendicular to the conveying direction of the third material conveying device;

[0008] A plurality of first push blocks are correspondingly arranged with each of the fourth material conveying devices, and are used for pushing the PTC ceramic heating sheets belonging to the same resistance range from the third material conveying device to the corresponding fourth material conveying device.

[0009] Further, the resistance sorting device further includes a plurality of material tubes and a plurality of fourth manipulators;

[0010] The plurality of material tubes are vertically arranged and respectively correspond to each of the fourth material conveying devices;

[0011] A plurality of fourth manipulators are respectively arranged corresponding to each of the fourth material conveying devices, and are used to grasp the PTC ceramic heating sheets conveyed to the designated positions by the fourth material conveying devices, and put them into the corresponding material tubes from the pipe orifices at the tops of the material tubes.

[0012] Furthermore, the resistance sorting device further includes a plurality of material tube switching devices respectively arranged corresponding to each of the fourth material conveying devices;

[0013] Two material tubes are correspondingly arranged for each of the fourth material conveying devices, and the two material tubes are installed on the material tube switching device, and the positions are switched by the material tube switching device so that the pre-loaded material tube corresponds to the blanking position of the fourth manipulator.

[0014] Furthermore, the material tube switching device includes a fixing frame, a first locking clip and a first linear driving device;

[0015] The fixing frame is fixedly arranged at the end of the fourth material conveying device and includes a vertical plate;

[0016] The first locking clips are in two groups and are arranged at intervals in the middle of the vertical plate, and are respectively used for locking the middle areas of the two material tubes;

[0017] The first linear driving device is used to drive the fixing frame to move linearly so as to switch the positions of the two material tubes on the fixing frame, so that the pre-loaded material tube corresponds to the blanking position of the fourth manipulator.

[0018] Furthermore, the material tube switching device further includes a push rod and a second motor;

[0019] The fixing frame further includes a bottom plate arranged at the bottom of the vertical plate for supporting the material tube, and slot holes are arranged at the positions corresponding to the material tubes on the bottom plate;

[0020] The push rod is arranged vertically;

[0021] The second motor is used to drive the push rod to move vertically so that the push rod passes through the slot hole and extends into the material tube to limit the falling height of the PTC ceramic heating sheet released by the fourth manipulator.

[0022] Furthermore, a rack is arranged on the side wall of the push rod along the axial direction;

[0023] A gear is arranged on the output shaft of the second motor, and the gear meshes with the rack.

[0024] Furthermore, the first linear driving device includes a fourth air cylinder, and the fourth air cylinder is arranged below the bottom plate, and its piston rod is connected to the bottom plate.

[0025] Further, the material pipe switching device further includes a second locking clip;

[0026] There are two groups of the second locking clips, which are arranged at intervals on the upper part of the vertical plate and are respectively used to lock the top areas of two material pipes.

[0027] Further, the resistance sorting device further includes a waste bin;

[0028] The waste bin is arranged at the end of the third material conveying device and is used to receive the PTC ceramic heating sheets that are not sorted by the first push block and fall from the end of the third material conveying device.

[0029] Further, a second push block and a third air cylinder are arranged at the end of the third material conveying device;

[0030] Wherein, the second push block is driven by the third air cylinder to move and is used to push the PTC ceramic heating sheet that moves to the end of the third material conveying device into the waste bin.

[0031] The beneficial effects of the present invention are as follows:

[0032] Through the collaborative work of each component, the resistance sorting device of the present invention can automatically sort and file according to the measured resistance value during the production process of PTC ceramic heating sheets, and classify the PTC ceramic heating sheets belonging to the same resistance value range into one category; compared with the current manual sorting and filing, it can reduce labor costs and improve sorting efficiency, which has positive significance for promoting the large-scale production of PTC ceramic heating sheets. Description of the Drawings

[0033] Figure 1 is the overall structure diagram of the resistance sorting device provided by the present invention;

[0034] Figure 2 is Figure 1 Based on, it is an effect diagram showing only the third material conveying device and one fourth material conveying device and their corresponding components;

[0035] Figure 3 is Figure 2 the exploded view of the material pipe and the corresponding material pipe switching device in;

[0036] Figure 4 is Figure 3 the exploded view of the fixing frame and the first linear driving device in;

[0037] Figure 5 is Figure 1 Based on, it is an effect diagram showing only the third material conveying device and the waste bin, the second push block, and the third air cylinder;

[0038] Figure 6 isFigure 1 The display diagram of the resistance value sorting device installed on the production line. Specific implementation mode

[0039] The present invention will be further introduced in detail below in combination with specific embodiments, but the implementation mode of the present invention is not limited thereto.

[0040] See Figures 1 to 6 The present invention provides a resistance value sorting device for the production of PTC ceramic heating sheets, which includes a third material conveying device 700, a plurality of fourth material conveying devices 810, and a plurality of first pushing blocks 820.

[0041] The third material conveying device 700 is used to convey the PTC ceramic heating sheets that have completed the resistance value test.

[0042] A plurality of fourth material conveying devices 810 are arranged at intervals in sequence along the conveying direction of the third material conveying device 700, and the conveying direction is perpendicular to the conveying direction of the third material conveying device 700.

[0043] A plurality of first pushing blocks 820 are arranged in one-to-one correspondence with each fourth material conveying device 810, and are used to push the PTC ceramic heating sheets belonging to the same resistance value range from the third material conveying device 700 to the corresponding fourth material conveying device 810.

[0044] In a preferred implementation mode of the present invention, as Figure 2 shown, the first pushing block 820 is installed on the piston rod of the first air cylinder 870, and the first air cylinder 870 is fixed beside the fourth material conveying device 810. The extending direction of the piston rod of the first air cylinder 870 is perpendicular to the conveying direction of the third material conveying device 700. When the first air cylinder 870 works, it can drive the first pushing block 820 to move, and push the PTC ceramic heating sheet from the third material conveying device 700 into the fourth material conveying device 810.

[0045] In a preferred implementation mode, see Figure 2 The resistance value sorting device of the present invention further includes a plurality of material tubes 830 and a plurality of fourth manipulators 840.

[0046] A plurality of material tubes 830 are arranged vertically and correspond to each fourth material conveying device 810 respectively.

[0047] A plurality of fourth manipulators 840 are arranged corresponding to each fourth material conveying device 810 respectively, and are used to grab the PTC ceramic heating sheets conveyed by the fourth material conveying device 810 to the designated position, and put them into the corresponding material tubes 830 from the tube openings at the tops of the material tubes 830.

[0048] Furthermore, see Figure 2 and Figure 3, the resistance sorting device of the present invention further includes a plurality of material tube switching devices 850 respectively corresponding to each fourth material conveying device 810.

[0049] Specifically, referring to Figure 3 , the material tube switching device 850 includes a fixing frame 851, a first locking clip 852, a second locking clip 857, a first linear driving device 853, a top rod 854 and a second motor 855.

[0050] The fixing frame 851 is fixedly arranged at the end of the fourth material conveying device 810, and includes a vertical plate 851a and a bottom plate 851b arranged at the bottom of the vertical plate 851a for supporting the material tube 830. Wherein, a slot hole 851b1 corresponding to the position of the material tube 830 is arranged on the bottom plate 851b.

[0051] The first locking clips 852 are two groups, spaced apart in the middle of the vertical plate 851a, and are respectively used for locking the middle regions of two material tubes 830.

[0052] The second locking clips 857 are two groups, spaced apart in the upper part of the vertical plate 851a, and are respectively used for locking the top regions of two material tubes 830.

[0053] The first linear driving device 853 is used to drive the fixing frame 851 to perform a linear motion, so as to switch the positions of two material tubes 830 on the fixing frame 851, and make the pre-loaded material tube 830 correspond to the blanking position of the fourth manipulator 840.

[0054] The top rod 854 is vertically arranged.

[0055] The second motor 855 is used to drive the top rod 854 to move vertically, so that the top rod 854 passes through the slot hole 851b1 and extends into the material tube 830, restricting the falling height of the PTC ceramic heating sheet released by the fourth manipulator 840.

[0056] Among them, referring to Figure 3 , both the first locking clip 852 and the second locking clip 857 include a clamping seat with an installation groove and a rotatable stopper. When fixing the material tube 830, the material tube 830 is clamped into the installation groove, and then the stopper is rotated and locked to lock the material tube 830.

[0057] Preferably, a rack 854a is provided on the side wall of the ejector rod 854 along the axial direction. The second motor 855 is fixed to the bottom of the bottom plate 851b, and a gear 856 is provided on the output shaft of the second motor 855, and the gear 856 meshes with the rack 854a of the ejector rod 854. Thus, when the second motor 855 operates, it can drive the ejector rod 854 to move up and down, thereby controlling the height of the ejector rod 854 extending into the material pipe 830 after passing through the slot hole 851b1. During operation, after one or more PTC ceramic heating sheets are placed in the material pipe 830, the second motor 855 drives the ejector rod 854 to move down a certain distance to ensure that the subsequent PTC ceramic heating sheets can be smoothly placed and the falling height is appropriate, avoiding damage due to excessive falling height.

[0058] Preferably, referring to Figure 4 , the first linear driving device 853 includes a fourth cylinder 853a, and the fourth cylinder 853a is arranged below the bottom plate 851b and fixed on a cylinder base 858. The piston rod of the fourth cylinder 853a is connected with a movable block 853b, and the movable block 853b can move linearly on the top of the fourth cylinder 853a, and the bottom plate 851b is fixedly connected to the top of the movable block 853b. Thus, when the fourth cylinder 853a operates, it will drive the movable block 853b to move linearly, and the movable block 853b will drive the fixing frame 851 to move through the bottom plate 851b, thereby realizing the position switching of the two material pipes 830. During operation, after a certain material pipe 830 is filled with PTC ceramic heating sheets, the position of the material pipe 830 can be switched by the fourth cylinder 853a to move another empty material pipe 830 to correspond to the blanking position of the fourth manipulator 840; after switching, the corresponding first lock clip 852 and second lock clip 857 are unlocked, and the material pipe 830 filled with PTC ceramic heating sheets can be removed. When removing, after the material pipe 830 is removed from the fixing frame 851, the bottom of the material pipe 830 can be immediately sealed with a plug to prevent the PTC ceramic heating sheets from falling out from the bottom of the material pipe 830.

[0059] In a preferred embodiment, referring to Figure 5 , the resistance sorting device of the present invention further includes a waste box 860.

[0060] The waste box 860 is arranged below the end of the third material conveying device 700 and is used to receive the PTC ceramic heating sheets that are not sorted by the first push block 820 and fall from the end of the third material conveying device 700.

[0061] Corresponding to the waste bin 860, a second push block 882 and a third cylinder 881 are further provided at the end of the third material conveying device 700. Among them, the third cylinder 881 is installed on a bracket 883, and the second push block 882 is driven by the third cylinder 881 to move, and is used to push the PTC ceramic heating sheet that has moved to the end of the third material conveying device 700 into the waste bin 860.

[0062] In the present invention, both the third material conveying device 700 and the fourth material conveying device 810 adopt belt conveying devices. In particular, referring to Figure 2 , the belt body of the third material conveying device 700 has protruding structures 710 arranged at intervals, and sunken grooves 720 are formed between adjacent protruding structures 710. The width of the sunken groove 720 is slightly larger than the width of the PTC ceramic heating sheet.

[0063] When the PTC ceramic heating sheet is placed on the third material conveying device 700, it is placed in the sunken groove 720 so that the subsequent first push block 820 or second push block 882 can accurately push the corresponding PTC ceramic heating sheet. Among them, referring to Figure 2 or Figure 5 for the enlarged view, a first notch 731 is provided on the retaining bar 730 on one side of the third material conveying device 700, and a second notch 732 corresponding to the first notch 731 is provided on the retaining bar 730 on the other side. The acting parts of the first push block 820 and the second push block 882 (i.e., the parts for pushing the PTC ceramic heating sheet) match the width of the sunken groove 720 and correspond to the position of the first notch 731. In the initial state, the acting parts of the first push block 820 and the second push block 882 are located in the first notch 731; during operation, the acting parts of the first push block 820 and the second push block 882 slide into the sunken groove 720, and push the PTC ceramic heating sheet in the sunken groove 720 down from the second notch 732.

[0064] As Figure 6 shown, it is a display diagram of the resistance sorting device of the present invention installed on the production line.

[0065] Figure 6 , a rotary resistance testing device 500 is provided at the front end of the resistance sorting device. The rotary resistance testing device 500 includes a turntable 510, a first motor 520, and a resistance tester 530. A plurality of uniformly distributed grooves 511 are arranged in a circular pattern on the upper surface of the turntable 510, and the grooves 511 are used to place the PTC ceramic heating sheet. The first motor 520 is used to drive the turntable 510 to rotate around its own axis. The resistance tester 530 is installed beside the turntable 510, and it can perform resistance testing on the PTC ceramic heating sheet that moves to correspond to it.

[0066] Figure 6In it, a third manipulator 600 is also provided between the rotary resistance testing device 500 and the resistance sorting device. The third manipulator 600 uses a PPU manipulator, and the end effector of this PPU manipulator is a suction nozzle, which is used to adsorb the PTC ceramic heating sheet. The PPU manipulator is a commonly used manipulator. When working, it can move quickly and accurately in the horizontal and vertical directions along a preset path, and repeatedly grab workpieces from one position and transport them to another position.

[0067] When working, the rotary resistance testing device 500 detects the resistance value of the PTC ceramic heating sheet while transmitting the detected resistance value data to the control system in the background; the third manipulator 600 grabs the PTC ceramic heating sheet that has completed the resistance test on the turntable 510 to the third material conveying device 700, and the third material conveying device 700 drives the PTC ceramic heating sheet to move forward; during the moving process, the control system in the background judges which position the PTC ceramic heating sheet with a certain resistance value moves to according to the conveying distance of the third material conveying device 700. When it moves to the sorting position matching the resistance value, the third material conveying device 700 pauses the conveying, and then the first cylinder 870 works to drive the first push block 820 to move, and pushes the PTC ceramic heating sheet into the corresponding fourth material conveying device 810. After that, at the end of the fourth material conveying device 810, the fourth manipulator 840 grabs the PTC ceramic heating sheet again and puts it into the corresponding material tube 830. Among them, after each one or more PTC ceramic heating sheets are placed in the material tube 830, the second motor 855 drives the ejector rod 854 to move down a certain distance to ensure that the subsequent PTC ceramic heating sheets can be smoothly placed and the falling height is appropriate. After the material tube 830 is filled, another material tube 830 can be switched through the material tube switching device 850 to continue loading; in addition, the PTC ceramic heating sheets that are not sorted by the first push block 820 on the third material conveying device 700 are unqualified products. Such PTC ceramic heating sheets will be conveyed to the end of the third material conveying device 700, and then the third cylinder 881 drives the second push block 882 to move, and pushes such PTC ceramic heating sheets into the waste bin 860 below.

[0068] For example, assume that the resistance values of qualified PTC ceramic heating sheets are divided into four grades, and the resistance value ranges are A1 - A2, A2 - A3, A3 - A4, and A4 - A5 respectively. Those with other resistance values are unqualified products. When the third material conveying device 700 conveys the PTC ceramic heating sheets, when the PTC ceramic heating sheet with a resistance value between A1 - A2 moves to the position corresponding to the first fourth material conveying device 810, the corresponding first push block 820 pushes the PTC ceramic heating sheet into the first fourth material conveying device 810. When the PTC ceramic heating sheet with a resistance value between A2 - A3 moves to the position corresponding to the second fourth material conveying device 810, the corresponding first push block 820 pushes the PTC ceramic heating sheet into the second fourth material conveying device 810, and so on. The four fourth material conveying devices 810 respectively sort the PTC ceramic heating sheets within the four resistance value ranges, while the unqualified PTC ceramic heating sheets are conveyed to the end of the third material conveying device 700 and are pushed into the waste box 860 by the second push block 882.

[0069] In summary, it can be seen that through the collaborative work of each component, the resistance value sorting device of the present invention can automatically sort and file according to the measured resistance value during the production process of PTC ceramic heating sheets, and classify the PTC ceramic heating sheets belonging to the same resistance value range into one grade. Compared with the current manual sorting and filing, it can reduce labor costs and improve sorting efficiency, which has positive significance for promoting the large-scale production of PTC ceramic heating sheets.

[0070] The above description is only the preferred implementation manner of the present invention and is not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A resistance sorting device for the production of PTC ceramic heating sheets, characterized in that, Comprising: A third material conveying device (700) for conveying the PTC ceramic heating sheets that have completed the resistance test; A plurality of fourth material conveying devices (810), which are arranged at intervals in sequence along the conveying direction of the third material conveying device (700), and the conveying direction is perpendicular to the conveying direction of the third material conveying device (700); A plurality of first pushing blocks (820), which are correspondingly arranged with each of the fourth material conveying devices (810), and are used for pushing the PTC ceramic heating sheets belonging to the same resistance range from the third material conveying device (700) to the corresponding fourth material conveying device (810).

2. The resistance sorting device for the production of PTC ceramic heating sheets according to claim 1, characterized in that, The resistance sorting device further comprises a plurality of material tubes (830) and a plurality of fourth manipulators (840); The plurality of material tubes (830) are vertically arranged and respectively correspond to each of the fourth material conveying devices (810); The plurality of fourth manipulators (840) are respectively arranged corresponding to each of the fourth material conveying devices (810), and are used for grasping the PTC ceramic heating sheets conveyed by the fourth material conveying device (810) to a designated position, and putting them into the corresponding material tubes (830) from the pipe orifices at the tops of the material tubes (830).

3. The resistance sorting device for the production of PTC ceramic heating sheets according to claim 2, wherein, The resistance sorting device further comprises a plurality of material tube switching devices (850) respectively arranged corresponding to each of the fourth material conveying devices (810); Two of the material tubes (830) are correspondingly arranged for each of the fourth material conveying devices (810), and the two material tubes (830) are installed on the material tube switching device (850), and the positions are switched by the material tube switching device (850) so that the pre-loaded material tube (830) corresponds to the blanking position of the fourth manipulator (840).

4. The resistance sorting device for PTC ceramic heating sheet production according to claim 3, characterized in that, The material tube switching device (850) comprises a fixing frame (851), a first clamping clip (852) and a first linear driving device (853); The fixing frame (851) is fixedly arranged at the end of the fourth material conveying device (810), and it comprises a vertical plate (851a); The first clamping clip (852) is in two groups, which are arranged at intervals in the middle of the vertical plate (851a) and are respectively used for locking the middle regions of the two material tubes (830); The first linear driving device (853) is used for driving the fixing frame (851) to perform a linear motion so as to switch the positions of the two material tubes (830) on the fixing frame (851), so that the pre-loaded material tube (830) corresponds to the blanking position of the fourth manipulator (840).

5. The resistance sorting device for PTC ceramic heating sheet production according to claim 4, characterized in that, The material tube switching device (850) further comprises a ejector rod (854) and a second motor (855); The fixing frame (851) further comprises a bottom plate (851b) arranged at the bottom of the vertical plate (851a) for supporting the material tube (830), and a slot hole (851b1) is arranged at the position corresponding to the material tube (830) on the bottom plate (851b); The ejector rod (854) is vertically arranged; The second motor (855) is used to drive the vertical movement of the ejector rod (854), so that the ejector rod (854) extends into the material pipe (830) through the slot hole (851b1), and limits the falling height of the PTC ceramic heating sheet released by the fourth manipulator (840).

6. The resistance sorting device for PTC ceramic heating sheet production according to claim 5, wherein, A rack (854a) is arranged on the side wall of the ejector rod (854) along the axial direction; A gear (856) is arranged on the output shaft of the second motor (855), and the gear (856) meshes with the rack (854a).

7. The resistance sorting device for the production of PTC ceramic heating sheets according to claim 5, characterized in that, The first linear driving device (853) includes a fourth cylinder (853a), and the fourth cylinder (853a) is arranged below the bottom plate (851b), and its piston rod is connected to the bottom plate (851b).

8. The resistance sorting device for PTC ceramic heating sheet production according to claim 4, characterized in that, The material pipe switching device (850) further includes a second locking clip (857); There are two groups of the second locking clips (857), which are arranged at intervals on the upper part of the vertical plate (851a) and are respectively used to lock the top areas of the two material pipes (830).

9. The resistance sorting device for the production of PTC ceramic heating sheets according to any one of claims 1 to 8, characterized in that, The resistance sorting device further includes a waste bin (860); The waste bin (860) is arranged at the end of the third material conveying device (700) and is used to receive the PTC ceramic heating sheets that are not sorted by the first push block (820) and fall from the end of the third material conveying device (700).

10. The resistance sorting device for the production of PTC ceramic heating sheets according to claim 9, characterized in that, A second push block (882) and a third cylinder (881) are arranged at the end of the third material conveying device (700); Wherein, the second push block (882) is driven by the third cylinder (881) to move, and is used to push the PTC ceramic heating sheet that moves to the end of the third material conveying device (700) into the waste bin (860).

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