Hollow blow molding device

Abstract

The utility model discloses hollow blow molding equipment which comprises an extruder, a plurality of opening and closing mold forming mechanisms, a displacement mechanism and a control system, and the displacement mechanism is provided with a manipulator capable of moving between the extruder and the opening and closing mold forming mechanisms. The control system comprises a PLC master station and slave station module, a touch screen, a digital quantity input module, a digital quantity output module, a hydraulic servo system and a servo driver, a plurality of first proximity sensors are arranged on the hollow blow molding equipment, and the plurality of first proximity sensors are connected with the digital quantity input module and are used for feeding back the position of the manipulator; the slave station module is used for receiving an instruction of the PLC master station and switching among a plurality of mold opening and closing forming mechanisms; the mold opening and closing forming mechanism is driven by the hydraulic servo system to execute mold opening and mold closing actions; and the digital quantity output module is in signal connection with the pneumatic electromagnetic valve and the intermediate relay.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plastic forming, in particular to a hollow blow molding equipment. BACKGROUND

[0002] The common blow molding hollow forming machine on the market includes a blow extruder head and a displacement structure arranged below the blow extruder head, and the displacement structure is provided with an opening and closing mold mechanism; in implementation, first, the blow extruder processes plastic raw materials to form a hot soft plastic tube blank, then the opening and closing mold mechanism is moved to be close to the blow extruder head below by the displacement structure, then the blow extruder delivers the processed hot soft plastic tube blank into the opening and closing mold mechanism forming mold, then the blow molding device is moved away from the blow extruder by the moving structure, then the hot soft plastic tube blank is blow molded into a predetermined shape by the blow molding device, so as to form a plastic product with residual temperature and having been preliminarily formed, then the plastic product is transported to a deburring station for deburring treatment, after completion, the plastic product still having residual temperature is transported to a cooling station for cooling treatment, so as to form the final plastic product.

[0003] The above technology has the following disadvantages: first, the opening and closing mold mechanism of the common blow molding machine can weigh about 3 tons, and each time the blow opening and closing mold mechanism is used, the opening and closing mold mechanism needs to be moved back and forth by the displacement structure, which consumes a lot of electric energy, so that the cost of blow molding plastic products is high; second, before deburring treatment and cooling of the plastic product, the plastic product needs to be moved from one station to another station, and it is very time-consuming to transport the plastic product between different stations, thereby reducing the processing efficiency of the plastic product. SUMMARY

[0004] The purpose of the present application is to provide a hollow blow molding equipment suitable for multiple stations, which can realize full-automatic production control.

[0005] In order to achieve the above object, the hollow blow molding equipment comprises one or more extruders, a plurality of open-close mold forming mechanisms, a displacement mechanism and a control system, characterized in that the displacement mechanism has a mechanical hand capable of moving between the extruder and the plurality of open-close mold forming mechanisms, the control system comprises a PLC master station and a slave module connected in communication with the PLC master station, a touch screen, a digital quantity input module, a digital quantity output module, a hydraulic servo system and a servo driver, a plurality of first proximity sensors are arranged on the hollow blow molding equipment, the plurality of first proximity sensors are connected with the digital quantity input module and are used for feeding back the position of the mechanical hand, the slave module is used for receiving the instruction of the PLC master station and switching among the plurality of open-close mold forming mechanisms, the open-close mold forming mechanism is driven by the hydraulic servo system to execute the open-close mold action, the digital quantity output module is connected with a pneumatic electromagnetic valve and an intermediate relay signal, the pneumatic electromagnetic valve is used for controlling the mechanical hand to execute the clamping or loosening action, and the pneumatic electromagnetic valve is also used for controlling the open-close mold forming mechanism to execute the blowing and exhausting action.

[0006] In one embodiment, the displacement mechanism comprises a blank mechanical hand for grabbing the blank and feeding it into each open-close mold forming mechanism, and a product mechanical hand for grabbing the blow molded product in the open-close mold forming mechanism and transferring it.

[0007] In one embodiment, the hollow blow molding equipment further comprises an online burr removing mechanism, and the product mechanical hand can transfer the grabbed blow molded product to the online burr removing mechanism.

[0008] In one embodiment, the control system further comprises an analog quantity input module and a plurality of second sensors, the plurality of second sensors are used for detecting the open-close position of the mold plate of the open-close mold forming mechanism and feeding back to the analog quantity input module, and the analog quantity input module is connected in communication with the PLC master station.

[0009] In one embodiment, the second sensor adopts a TLH-275 type linear displacement sensor of Novotechnik Company, and the analog quantity input module selects a CTH3 AIS-040S1 type analog quantity input module of a CTH300 series of Haisi Company.

[0010] In one embodiment, the PLC master station adopts a CTH3H32-001S2 type programmable logic controller of a CTH300 series of Haisi Company, and the slave module adopts a CTH3 ECT-000S1 type slave module of a CTH300 series of Haisi Company.

[0011] In an embodiment, the servo driver is selected from ASD-B3-0721-E and / or ASD-B3-1043-E models of Delta Company.

[0012] In an embodiment, the first proximity sensor is selected from IME12-04BPSZW5S model of SICK Company, and the digital input module is selected from CTH3 DIT-320S1 model of CTH300 series of Haisi Company.

[0013] In an embodiment, the digital output module is selected from CTH3 DQT-320S1 model of CTH300 series of Haisi Company.

[0014] In an embodiment, the digital output module is further connected with a digital amplification circuit, and an output end of the digital amplification circuit is connected with the pneumatic electromagnetic valve.

[0015] In an embodiment, the digital output module is further connected with a digital amplification circuit, and an output end of the digital amplification circuit is connected with the pneumatic electromagnetic valve.

[0016] The application can realize automatic control of multiple stations for blow molding, improve the processing efficiency and the automation degree of the hollow blow molding equipment. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A front view of the hollow blow molding equipment according to an embodiment of the application is provided;

[0018] Figure 2 A top view of the hollow blow molding equipment according to an embodiment of the application is provided;

[0019] Figure 3 A schematic diagram of station arrangement according to an embodiment of the application is provided;

[0020] Figure 4 A perspective view of the displacement mechanism according to an embodiment of the application is provided;

[0021] Figure 5 A control system block diagram of the hollow blow molding equipment according to an embodiment of the application is provided.

[0022] Wherein: 100, extrusion system; 110, extruder head; 120, extruder; 200, mold opening and closing forming mechanism; 300, online burr removing mechanism; 400, displacement mechanism; 410, longitudinal track; 420, first transverse track; 430, second transverse track; 440, blank manipulator; 450, product manipulator; 460, clamping jaw; 500, hydraulic and electrical control cabinet; 510, high-altitude platform; 600, blow molded product. DETAILED DESCRIPTION

[0023] To describe the technical content, structural features, purposes and effects of the utility model in detail, the technical solutions in the embodiments of the present application will be described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. In the following description, for the purpose of explanation, a number of specific details are set forth in order to provide a thorough understanding of various exemplary embodiments or implementations of the present application. However, various exemplary embodiments can also be practiced without these specific details or with one or more equivalent arrangements. In addition, various exemplary embodiments can be different, but not necessarily exclusive. For example, the specific shape, structure and characteristics of an exemplary embodiment can be used or implemented in another exemplary embodiment without departing from the inventive concept.

[0024] Hereinafter, the terms "first", "second", and the like are used only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second", and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0025] In the present application, unless otherwise explicitly specified and limited, the term "connection" should be understood broadly, for example, "connection" can be fixed connection, or detachable connection, or integral; can be directly connected, or indirectly connected through an intermediate medium.

[0026] Referring to Figure 1 , 2 As shown in the drawings, the embodiments of the present application provide a hollow blow molding equipment, which comprises:

[0027] The extrusion system 100 comprises three extruders 120 and a shared extruder head 110. The hollow blow molding equipment further has a high-altitude platform 510, and the extrusion system is installed on the high-altitude platform 510, so that the extruder head 110 is at a higher position, facilitating the subsequent mechanical hand to grab the blank below. A cutter is arranged below the extruder head 110. After the mechanical hand grabs the blank, the cutter cuts the continuous blank, and the mechanical hand grabs the upper part of the segmented blank and moves forward.

[0028] Referring to Figure 3As shown, four open-close mold forming mechanisms 200 are located in front of the extruder head 110. After the blank is sent into the open-close mold forming mechanism 200, it will be blow molded and shaped in the open-close mold forming mechanism to form a hollow blow molded product. Since the blow molding process includes actions such as mold closing, mold locking, and blow molding, the operation time is relatively long. In order to maximize the matching efficiency of blow molding and extrusion, four open-close mold forming mechanisms are used in the present application. After the blank is sent into one open-close mold forming mechanism by the manipulator, the manipulator can return to the extruder head to grab the next blank after the mold closing is completed.

[0029] The four open-close mold forming mechanisms 200 are symmetrically arranged in two rows and two columns on both sides of the central axis of the hollow blow molding device. This arrangement cooperates with the structure of the displacement mechanism to take and place the blanks and products in the shortest route and most convenient displacement mechanism. See Figure 4 、 5 .

[0030] The online flash removal mechanism 300 is located in front of the plurality of open-close mold forming mechanisms 200 and can remove excess waste from the blow molded product. The online flash removal mechanism 300 is connected to the product conveying line, and the blow molded product after flash removal enters the next station through the product conveying line.

[0031] The displacement mechanism 400 is arranged above the plurality of open-close mold forming mechanisms 200 and the online flash removal mechanism 300, and is used to grab the blank extruded by the extruder head 110 and send it into each open-close mold forming mechanism 200, and to take the blow molded product from each open-close mold forming mechanism 200 and send it into the online flash removal mechanism 300.

[0032] Referring to Figure 4 , the displacement mechanism 400 includes a pair of longitudinal rails 410 extending in the front-rear direction and parallel to the central axis of the hollow blow molding device, a first transverse rail 420 slidably arranged on the pair of longitudinal rails 410 and perpendicular to the central axis, a second transverse rail 430, and a blank manipulator 440 slidably arranged on the first transverse rail 420 and a product manipulator 450 slidably arranged on the second transverse rail 430. The blank manipulator 440 and the product manipulator 450 respectively have clamping jaws 460 that can move up and down relative to the longitudinal rails and the transverse rails.

[0033] The first transverse rail 420 is close to the extruder head 110, and the blank manipulator 440 is used to send the blank into each open-close mold forming mechanism 200. The second transverse rail 430 is close to the online flash removal mechanism 300, and is used to grab the blow molded product and send it into the online flash removal mechanism 300.

[0034] Since the online flash trimming mechanism 300 is located on the central axis of the hollow blow molding equipment, the front part of the pair of longitudinal rails 410 can further be provided with a fixed third transverse rail, and a mechanical hand is used to grab and place the hollow blow molded product after flash trimming on the product conveying assembly line.

[0035] Further, the displacement mechanism 400 is located in front of the high-altitude platform 510, and the height of the clamping jaw 460 does not exceed the high-altitude platform 510.

[0036] The hollow blow molding equipment further has a hydraulic and electrical control cabinet 500, and in order to make the overall structure of the equipment compact and beautiful, the hydraulic and electrical control cabinet 500 is arranged below the high-altitude platform 510.

[0037] The hollow blow molding equipment of the present application is provided with four sets of mold opening and closing molding mechanisms 200, which are respectively provided with molding molds (A\B\C\D). In the working process, the extrusion system extrudes a plastic tube blank 0 with a suitable length and weight, and the tube blank 0 is placed into any one of the mold opening and closing molding mechanisms molding molds (A\B\C\D) through X, Y, Z three-axis space movement by the displacement mechanism embryo material mechanical hand 440, and is blow molded into a predetermined shape, thereby forming a plastic product with residual temperature and flash. Then the A\B\C\D mold cavity containing the flash is taken out by the displacement mechanism product clamp and placed into the online flash trimming mechanism P, and the flash trimming treatment is performed at this station to form the final product.

[0038] The control system of the hollow blow molding equipment of the present application is shown in Figure 5 The control system of the hollow blow molding equipment of the present application is shown in

[0039] The touch screen selects the 6AV2 123-0MB03-0AX0 model touch screen produced by Siemens Company, and various instructions such as manual operation, mode switching, time setting, position setting, function selection, etc. can be operated on it.

[0040] A plurality of first proximity sensors are arranged on the hollow blow molding equipment, and the plurality of first proximity sensors are connected with the digital quantity input module and are used for detecting and feeding back whether the movement position of each mechanical hand exceeds the specified area. In the embodiment, the first proximity sensor selects the IME12-04BPSZW5S model proximity sensor produced by SICK Company, and the digital quantity input module selects the digital quantity input module of CTH3 DIT-320S1 model of CTH300 series of Huitong Company.

[0041] After the digital input module transmits the signal to the PLC host station, the PLC host station issues an instruction to the servo driver ASD-B3-0721-E, ASD-B3-1043-E and the pneumatic electromagnetic valve, the servo driver ASD-B3-0721-E, ASD-B3-1043-E produced by Delta Company drives the movement of the blank manipulator and the product manipulator on the displacement mechanism, and the pneumatic electromagnetic valve can control the clamping or loosening action of the clamping jaw under the blank manipulator and the product manipulator.

[0042] The slave module is used for receiving the instruction of the PLC host station and switching in the plurality of mold opening and closing forming mechanisms, after the PLC host station selects a mold opening and closing forming mechanism, the slave module switches to the station for control, the mold opening and closing forming mechanism is driven by the hydraulic servo system to perform the mold opening and closing action, and the pneumatic electromagnetic valve cooperates to complete the blowing, exhaust and other actions. A plurality of second proximity sensors are arranged on the plurality of mold opening and closing forming mechanisms, the second proximity sensor is a TLH-275 type linear displacement sensor of Novotechnik Company, which can be used to detect the mold plate opening and closing position of the mold opening and closing forming mechanism and feed back to the analog input module, and the analog input module selects a CTH3AIS-040S1 type analog input module of a CTH300 series of Haisi Company.

[0043] The digital output module receives the control signal of the PLC host station, and the digital output module is connected with the pneumatic electromagnetic valve and the intermediate relay signal. In the embodiment, the digital output module selects a CTH3 DQT-320S1 type digital output module of a CTH300 series of Haisi Company.

[0044] In the embodiment, the PLC host station adopts a CTH3H32-001S2 type programmable logic controller of a CTH300 series of Haisi Company, and the slave module adopts a CTH3 ECT-000S1 type slave module of a CTH300 series of Haisi Company.

[0045] The basic principle, main features and advantages of the utility model are shown and described. It should be understood by those skilled in the art that the utility model is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and the description in the specification are only to illustrate the principle of the utility model, and the utility model can have various changes and improvements without departing from the spirit and scope of the invention, and the protection scope of the utility model is defined by the attached claims, the specification and the equivalent thereof.

Claims

1. A hollow blow molding apparatus comprising: One or more extruders, a plurality of open-close mold forming mechanisms, a displacement mechanism, and a control system, characterized in that the displacement mechanism has a mechanical hand capable of moving between the extruders and the plurality of open-close mold forming mechanisms, the control system comprises a PLC master station and a slave module, a touch screen, a digital quantity input module, a digital quantity output module, a hydraulic servo system, and a servo driver in communication connection with the PLC master station, a plurality of first proximity sensors are arranged on the hollow blow molding equipment, the plurality of first proximity sensors are connected with the digital quantity input module and are used for feeding back the position of the mechanical hand; the slave module is used for receiving the instruction of the PLC master station and switching among the plurality of open-close mold forming mechanisms; the open-close mold forming mechanism is driven by the hydraulic servo system to execute the open-close mold action; the digital quantity output module is connected with a pneumatic electromagnetic valve and an intermediate relay signal, the pneumatic electromagnetic valve is used for controlling the mechanical hand to execute the clamping or loosening action, and the pneumatic electromagnetic valve is also used for controlling the open-close mold forming mechanism to execute the blowing and exhausting action.

2. The hollow blow molding apparatus according to claim 1, characterized by, The displacement mechanism comprises an embryo material mechanical hand for grabbing embryo material and feeding it into each open-close mold forming mechanism and a product mechanical hand for grabbing the blow molded product in the open-close mold forming mechanism and transferring.

3. The hollow blow molding apparatus according to claim 2, characterized by, An online trimming mechanism is further included, and the product mechanical hand can transfer the grabbed blow molded product to the online trimming mechanism.

4. The hollow blow molding apparatus according to claim 1, characterized by, The control system further comprises an analog quantity input module and a plurality of second sensors, the plurality of second sensors are used for detecting the open-close position of the mold plate of the open-close mold forming mechanism and feeding back to the analog quantity input module, and the analog quantity input module is in communication connection with the PLC master station.

5. The hollow blow molding apparatus according to claim 4, characterized by, The second sensor adopts a TLH-275 type linear displacement sensor of Novotechnik Company, and the analog quantity input module selects a CTH3 AIS-040S1 type analog quantity input module of a CTH300 series of Haisi Company.

6. The hollow blow molding apparatus according to claim 1, characterized by, The PLC master station adopts a CTH3H32-001S2 type programmable logic controller of a CTH300 series of Haisi Company, and the slave module adopts a CTH3 ECT-000S1 type slave module of a CTH300 series of Haisi Company.

7. The hollow blow molding apparatus according to claim 1, characterized by, The servo driver selects an ASD-B3-0721-E and / or ASD-B3-1043-E type servo driver of Delta Company.

8. The hollow blow molding apparatus according to claim 1, characterized by, The first proximity sensor selects an IME12-04BPSZW5S type proximity sensor produced by SICK Company, and the digital quantity input module selects a CTH3 DIT-320S1 type digital quantity input module of a CTH300 series of Haisi Company.

9. The hollow blow molding apparatus according to claim 1, characterized by, The digital quantity output module selects a CTH3 DQT-320S1 type digital quantity output module of a CTH300 series of Haisi Company.

10. The hollow blow molding apparatus according to claim 9, characterized by, The digital quantity output module is further connected with a digital amplification circuit, and the output end of the digital amplification circuit is connected with the pneumatic electromagnetic valve.

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