Integrated blow molding equipment capable of recycling waste materials and blow molding method

Abstract

The invention relates to the technical field of blow molding equipment, and provides integrated blow molding equipment capable of recycling waste materials and a blow molding method.The integrated blow molding equipment comprises a base body; the extrusion device is arranged on the base body and can receive plastic particles manufactured by the plastic granulator and extrude the plastic particles into hollow parisons; the mold comprises two first half molds and two second half molds, the two first half molds can move away from each other and can move close to each other to a closed state to form a first blow molding cavity with a first upper opening, and the two second half molds can move away from each other to form a second blow molding cavity with a second upper opening; the first blow molding cavity and the second blow molding cavity can move close to each other to a closed state to form a second blow molding cavity with a second upper opening, and the sizes of the first blow molding cavity and the second blow molding cavity are different from each other; and the blow molding executing mechanism is used for conducting blow molding on the parisons in the first blow molding cavity and the second blow molding cavity to form the plastic bottles, and the equipment can meet the blow molding requirements of the plastic bottles of multiple specifications.

Description

Technical Field

[0001] This application relates to the technical field of blow molding equipment. More specifically, it relates to an integrated blow molding equipment and a blow molding method for waste recycling. Background Art

[0002] In the plastic processing industry, with the sharp increase in the production volume of plastic products, the problem of waste plastic disposal has become increasingly prominent, becoming a major challenge restricting the sustainable development of the industry. Traditionally, waste plastics are often landfilled or incinerated, which not only occupies a large amount of land resources but also may cause environmental pollution, such as soil pollution, water pollution, and air pollution. In recent years, with the enhancement of environmental awareness and the promotion of the concept of resource recycling, waste recycling technology has become a research hotspot.

[0003] Waste recycling first requires converting waste plastics into renewable plastic pellets through a plastic granulator, and then melting the plastic pellets through a blow molding device (blow molding machine) and blowing them into plastic products of the required shape through a series of processes, such as common plastic bottles, plastic barrels, stacking barrels, as well as hardware toolboxes, automotive plastic parts, and so on. Thus, by recycling plastic waste, the demand for pure raw materials is reduced, resources are saved, and costs are lowered. Taking the blow molding equipment for blow molding plastic bottles in the prior art as an example, the entire equipment can only blow mold plastic bottles of one size specification and cannot manufacture plastic bottles of two different sizes, unable to meet the blow molding requirements of plastic bottles of multiple specifications. Summary of the Invention

[0004] In view of this, this application provides a blow molding method and a testing device to solve the technical problem that the plastic bottle blow molding equipment in the prior art cannot meet the blow molding requirements of plastic bottles of multiple specifications.

[0005] This application provides an integrated blow molding equipment for waste recycling, wherein the integrated blow molding equipment for waste recycling includes: A base; An extrusion device arranged on the base, the extrusion device being capable of receiving the plastic pellets made by a plastic granulator and extruding the plastic pellets into a hollow parison; A mold arranged on the base, the mold including two first half - molds and two second half - molds. The two first half - molds can move away from each other and can move closer to each other to a closed state to form a first blow molding cavity with a first upper opening. The two second half - molds can move away from each other and can move closer to each other to a closed state to form a second blow molding cavity with a second upper opening. The sizes of the first blow molding cavity and the second blow molding cavity are different from each other, and both the first blow molding cavity and the second blow molding cavity can receive the parison extruded by the extrusion device; The blow molding actuator disposed on the substrate is used to blow-mold the preforms in the first blow molding cavity and the second blow molding cavity into plastic bottles.

[0006] Further, the integrated blow molding equipment for waste recycling includes two first linear drive mechanisms and two second linear drive mechanisms. The two first linear drive mechanisms are used to drive two first half-molds to move away from and close to each other one by one. The two second linear drive mechanisms are used to drive two second half-molds to move away from and close to each other one by one. The two second linear drive mechanisms penetrate through the respective first half-molds one by one. The two second half-molds are located between the two first half-molds. When the two first half-molds move close to each other to the closed state, the two second half-molds can respectively extend into the inner walls of the two first half-molds.

[0007] Further, the two second linear drive mechanisms are respectively mounted on the respective first half-molds.

[0008] Further, the two first half-molds respectively have first grooves facing each other. When the two first half-molds move close to each other to the closed state, the first grooves of the two first half-molds combine to form the first blow molding cavity. The two second half-molds respectively have second grooves facing each other. When the two second half-molds move close to each other to the closed state, the second grooves of the two second half-molds combine to form the second blow molding cavity. The integrated blow molding equipment for waste recycling includes a sealing plate that can be detachably connected to the second half-mold and close the corresponding second groove of the second half-mold. When the two second half-molds are both connected with the sealing plates and respectively extend into the inner walls of the two first half-molds, the two sealing plates are respectively flush with the inner wall surfaces of the corresponding first half-molds.

[0009] Further, the end faces of the two second half-molds facing each other respectively have insertion holes, and the sealing plate has insertion posts for inserting into the insertion holes of the corresponding second half-molds.

[0010] Further, the end faces of the two second half-molds facing each other respectively have mounting grooves, and pressure sensors are arranged in the respective mounting grooves. The pressure sensors are in contact with the bottom surfaces of the corresponding mounting grooves. When the two second half-molds move close to each other to the closed state, the pressure sensor in the mounting groove of one second half-mold is in contact with the end face of the other second half-mold; when the second half-mold is connected with the sealing plate, the pressure sensors in the mounting grooves of the respective second half-molds are in contact with the corresponding sealing plates.

[0011] Further, the integrated blow molding equipment for waste recycling includes a liftable platform disposed on the base body. The blow molding actuator includes a compressed air nozzle disposed on the liftable platform. A flow control electric valve is disposed on the compressed air nozzle. The flow control electric valve can control the on-off and flow rate of the compressed air nozzle. The flow control electric valve is in signal connection with the pressure sensor.

[0012] Further, the extrusion device includes a heating device, a plastic granule feed hopper, a screw conveyor, and an extrusion die head. The input end of the screw conveyor is connected to the plastic granule feed hopper, and the output end of the screw conveyor is connected to the extrusion die head. The hollow parison is extruded from the outlet of the extrusion die head. The heating device is disposed on the outer wall of the screw conveyor. The integrated blow molding equipment for waste recycling further includes a moving drive device. The moving drive device can drive the mold to move between the parison receiving station and the blow molding station. At the parison receiving station, the mold is located below the outlet of the extrusion die head. At the blow molding station, the mold is located below the compressed air nozzle.

[0013] In addition, the present invention further provides a blow molding method, which is implemented by using the above integrated blow molding equipment for waste recycling. The blow molding method includes a small-sized plastic bottle blow molding method and a large-sized plastic bottle blow molding method. The small-sized plastic bottle blow molding method includes the steps of: S1. Driving the two second half-molds to move closer to each other one by one by the two second linear drive mechanisms until they are in a closed state; S2. Driving the mold to move to the parison receiving station by the moving drive device, aligning the outlet of the extrusion die head with the second upper opening of the second blow molding cavity, and enabling the parison extruded from the outlet of the extrusion die head to fall into the second blow molding cavity; S3. Driving the mold to move to the blow molding station by the moving drive device, enabling the compressed air nozzle to enter the second blow molding cavity from the second upper opening and extend into the parison in the second blow molding cavity; S4. Opening the flow control electric valve, ventilating the compressed air nozzle to blow the parison in the second blow molding cavity into a small-sized plastic bottle; The large-sized plastic bottle blow molding method includes the steps of: T1. Installing the sealing plates on the respective second half-molds, driving the two second half-molds to move away from each other one by one by the two second linear drive mechanisms until they respectively extend into the inner walls of the two first half-molds, and making the respective sealing plates flush with the inner wall surfaces of the corresponding first half-molds; T2. Driving the two first half-molds to move closer to each other one by one by the two first linear drive mechanisms until they are in a closed state; T3. Drive the mold to move to the parison receiving station by the moving drive device, and align the outlet of the extrusion die head with the first upper opening of the first blow molding cavity, so that the parison extruded from the outlet of the extrusion die head falls into the first blow molding cavity; T4. Drive the mold to move to the blow molding station by the moving drive device, and make the compressed air nozzle enter the first blow molding cavity from the first upper opening and extend into the parison in the first blow molding cavity; T5. Open the flow control electric valve, and supply air to the compressed air nozzle to blow the parison in the first blow molding cavity into a large-sized plastic bottle.

[0014] Further, the blow molding method includes: In step S4, when the pressure value of the pressure sensor is greater than the first preset value and lasts for the first preset time, close the flow control electric valve to stop blow molding; In step T5, when the pressure value of the pressure sensor is greater than the second preset value and lasts for the second preset time, close the flow control electric valve to stop blow molding.

[0015] The beneficial effects of the blow molding method provided by the present invention are: Compared with the prior art, since the integrated blow molding equipment for waste recycling provided by the present invention has two first half molds and two second half molds, the two first half molds can move closer to each other to form a first blow molding cavity, and the two second half molds can move closer to each other to form a second blow molding cavity, and the sizes of the first blow molding cavity and the second blow molding cavity are different from each other. Therefore, the plastic bottles blown from the parisons in the first blow molding cavity and the plastic bottles blown from the parisons in the second blow molding cavity by the blow molding actuator are also different from each other. Thus, using an integrated blow molding equipment for waste recycling provided by the present invention can meet the blow molding requirements of plastic bottles of multiple specifications, greatly saving production costs and the blow molding efficiency of plastic bottles. It can be used as the production equipment for an important link in converting waste plastics into finished plastic bottles, and can improve the resource recycling rate of waste plastics. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a three-dimensional schematic diagram of an integrated blow molding equipment for waste recycling according to an embodiment of the present application; Figure 2is Figure 1 An enlarged view of part A in Figure 3 is Figure 1 An enlarged view of part B in Figure 4 A partial perspective view of an integrated blow molding device for waste recycling according to an embodiment of the present application; Figure 5 is Figure 4 An enlarged view of part A in Figure 6 A schematic view of the mold in the first state in an integrated blow molding device for waste recycling according to an embodiment of the present application; Figure 7 A schematic view of the mold in the second state in an integrated blow molding device for waste recycling according to an embodiment of the present application; Figure 8 A schematic view of the mold in the third state in an integrated blow molding device for waste recycling according to an embodiment of the present application; Figure 9 A perspective view of a sealing plate in an integrated blow molding device for waste recycling according to an embodiment of the present application; Figure 10 A top view of a sealing plate in an integrated blow molding device for waste recycling according to an embodiment of the present application; Figure 11 is Figure 10 A cross-sectional view taken along line L-L in

[0018] Explanation of reference numerals: 1 - First upper opening; 2 - First blow molding cavity; 3 - Second upper opening; 4 - Second blow molding cavity; 5 - First linear drive mechanism; 6 - Second linear drive mechanism; 7 - Mold table; 8 - Slide rail; 9 - Liftable table; 10 - Compressed air nozzle; 11 - Lifting cylinder; 12 - Heating device; 13 - Plastic particle feed hopper; 14 - Screw conveyor; 15 - Extrusion die head; 16 - Extrusion tube; 17 - Electric guide rail; 18 - Connecting frame; 100 - Base body; 101 - Base; 102 - Top plate; 200 - First half mold; 201 - First groove; 202 - Mold accommodation groove; 300 - Second half mold; 301 - Second groove; 302 - Insertion hole; 303 - Installation groove; 400 - Sealing plate; 401 - Sealing plate arc surface; 402 - Insertion post. Detailed implementation manners

[0019] To facilitate the understanding of the present application, the present application will be described more comprehensively below with reference to the relevant drawings. One or at least three embodiments of the present application are exemplarily shown in the drawings to make the understanding of the technical solutions disclosed in the present application more accurate and thorough. However, it should be understood that the present application can be implemented in various different forms and is not limited to the embodiments described below.

[0020] In the drawings of the present application, the same or similar reference numerals correspond to the same or similar components; in the description of the present application, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only for exemplary illustration and cannot be construed as a limitation of the present application. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0021] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the technical features indicated. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where A and B are satisfied simultaneously.

[0022] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present application.

[0023] See Figures 1 to 8 , according to one aspect of the present invention, an integrated blow molding device for waste recycling is provided, wherein the integrated blow molding device for waste recycling includes: A matrix 100, including a base 101 and a top plate 102 provided on the base 101; An extrusion device provided on the matrix 100, which can receive plastic particles made by a plastic granulator and extrude the plastic particles into a hollow parison; A mold disposed on a substrate 100, the mold includes two first half-molds 200 and two second half-molds 300. The two first half-molds 200 can move away from each other and can move closer to each other to a closed state to form a first blow molding cavity 2 having a first upper opening 1. The two second half-molds 300 can move away from each other and can move closer to each other to a closed state to form a second blow molding cavity 4 having a second upper opening 3. The sizes of the first blow molding cavity 2 and the second blow molding cavity 4 are different from each other. Both the first blow molding cavity 2 and the second blow molding cavity 4 can receive preforms extruded by an extrusion device. Specifically, Figure 6 It is a schematic diagram of the mold in the first state in the integrated blow molding device for waste recycling according to an embodiment of the present application, wherein the two first half-molds 200 are separated from each other, and the two second half-molds 300 are separated from each other. Figure 7 It is a schematic diagram of the mold in the second state in the integrated blow molding device for waste recycling according to an embodiment of the present application, wherein the two first half-molds 200 are separated from each other, and the two second half-molds 300 are closed to form the second blow molding cavity 4. Figure 8 It is a schematic diagram of the mold in the third state in the integrated blow molding device for waste recycling according to an embodiment of the present application, wherein the two first half-molds 200 are closed to form the first blow molding cavity 2, and the two second half-molds 300 are separated from each other; A blow molding actuator disposed on the substrate 100, which is used to blow the preforms in the first blow molding cavity 2 and the second blow molding cavity 4 into plastic bottles. Of course, based on the structural design of the two first half-molds 200 and the two second half-molds 300, the preforms can also be blown into plastic products of other shapes. Specifically, the mold can be disposed on a base 101, and the blow molding actuator and the extrusion device are disposed on a top plate 102.

[0024] Since the integrated blow molding device for waste recycling provided by the present invention has two first half-molds 200 and two second half-molds 300, the two first half-molds 200 can move closer to each other to form the first blow molding cavity 2, the two second half-molds 300 can move closer to each other to form the second blow molding cavity 4, and the sizes of the first blow molding cavity 2 and the second blow molding cavity 4 are different from each other. Therefore, the sizes of the plastic bottles blown from the preforms in the first blow molding cavity 2 and the plastic bottles blown from the preforms in the second blow molding cavity 4 by the blow molding actuator are also different from each other. Thus, using an integrated blow molding device for waste recycling provided by the present invention can meet the blow molding requirements of plastic bottles of multiple specifications, greatly saving production costs and improving the blow molding efficiency of plastic bottles.

[0025] According to an embodiment of the present application, the integrated blow molding equipment for waste recycling includes two first linear driving mechanisms 5 and two second linear driving mechanisms 6. The two first linear driving mechanisms 5 are used to drive two first half-molds 200 away from and close to each other one by one. The two second linear driving mechanisms 6 are used to drive two second half-molds 300 away from and close to each other one by one. The two second linear driving mechanisms 6 penetrate through the respective first half-molds 200 one by one. The two second half-molds 300 are located between the two first half-molds 200. When the two first half-molds 200 move close to each other to the closed state, the two second half-molds 300 can respectively extend into the inner walls of the two first half-molds 200. A mold receiving groove 202 is provided on the inner wall of the first half-mold 200 for receiving the correspondingly extending second half-mold 300. Therefore, in this embodiment, the size of the second half-mold 300 is smaller than that of the first half-mold 200, and the size of the second blow molding cavity 4 is smaller than that of the first blow molding cavity 2. Herein, the inner wall (or inner side) of the first half-mold 200 refers to the wall (or one side) of the first half-mold 200 that is used to enclose the first blow molding cavity 2. The inner wall (or inner side) of the second half-mold 300 refers to the wall (or one side) of the second half-mold 300 that is used to enclose the second blow molding cavity 4. By analogy, the outer wall (or outer side) of the first half-mold 200 refers to the wall (or one side) of the first half-mold 200 that faces away from its inner wall (or inner side). The outer wall (or outer side) of the second half-mold 300 refers to the wall (or one side) of the second half-mold 300 that faces away from its inner wall (or inner side).

[0026] According to a specific embodiment of the present application, the two second linear driving mechanisms 6 are respectively installed on the respective first half-molds 200. Specifically, the first linear driving mechanism 5 and the second linear driving mechanism 6 can both be air cylinders and hydraulic cylinders, and can also be screw-nut mechanisms, etc. Taking the air cylinder as an example for detailed description, the first linear driving mechanism 5 is a first air cylinder, and the second linear driving mechanism 6 is a second air cylinder. A mold table 7 is provided on the base body 100, and a slide rail 8 is provided on the mold table 7. The two first half-molds 200 are slidably arranged on the slide rail 8. The cylinder bodies of the two first air cylinders (the first linear driving mechanism 5) are both arranged on the mold table 7 and located on both sides of the two first half-molds 200. The piston rod of one of the first air cylinders is connected to the outer wall of one of the first half-molds 200, and the piston rod of the other first air cylinder is connected to the outer wall of the other first half-molds 200. The cylinder bodies of the two second air cylinders (the second linear driving mechanism 6) are respectively connected to the outer walls of the two first half-molds 200 through a connecting frame 18. The piston rods of the two second air cylinders penetrate through the correspondingly connected first half-molds 200 and are connected to the outer walls of the corresponding second half-molds 300.

[0027] See Figures 8 to 11, according to the specific embodiments of the present application, the two first half - molds 200 respectively have first grooves 201 facing each other. For forming a plastic bottle, the first groove 201 can be two semi - circular grooves connected up and down. The diameter of the upper semi - circular groove is smaller than that of the lower semi - circular groove for forming the bottle head, and the lower semi - circular groove is for forming the bottle body. When the two first half - molds 200 move closer to each other to the closed state, the first grooves 201 of the two first half - molds 200 combine to form the first blow - molding cavity 2. The two second half - molds 300 respectively have second grooves 301 facing each other. For forming a plastic bottle, the second groove 301 can be two semi - circular grooves connected up and down. The diameter of the upper semi - circular groove is smaller than that of the lower semi - circular groove for forming the bottle head, and the lower semi - circular groove is for forming the bottle body. When the two second half - molds 300 move closer to each other to the closed state, the second grooves 301 of the two second half - molds 300 combine to form the second blow - molding cavity 4. The integrated blow - molding equipment for waste recycling includes a sealing plate 400 that can be detachably connected to the second half - mold 300 and closes the corresponding second groove 301 of the second half - mold 300. When the two second half - molds 300 are both connected with the sealing plates 400 and respectively extend into the inner walls of the two first half - molds 200 (inside the mold receiving groove 202), the two sealing plates 400 are flush with the inner wall surfaces of the corresponding first half - molds 200. For example, when the first blow - molding cavity 2 forms a cylindrical cavity for forming a circular plastic bottle, the inner wall surface of the first half - mold 200 is an arc surface, and the side of the sealing plate 400 facing away from the second half - mold 300 is also the corresponding sealing - plate arc surface 401. When the first blow - molding cavity 2 forms a rectangular cavity for forming a rectangular plastic bottle, the inner wall surface of the first half - mold 200 is a plane, and the side of the sealing plate 400 facing away from the second half - mold 300 is also the corresponding sealing - plate plane.

[0028] According to the preferred embodiment of the present application, when the second half - mold 300 is connected with the sealing plate 400, when the second half - mold 300 extends into the mold receiving groove 202 of the two first half - molds 200 and abuts against the bottom of the mold receiving groove 202, the surface of the side of the sealing plate 400 facing away from the second half - mold 300 is exactly flush with the inner wall surface of the first half - mold 200.

[0029] As other embodiments, it is also possible to entirely adjust the position of the second half - mold 300 by the second linear driving mechanism 6 such that the surface of the side of the sealing plate 400 facing away from the second half - mold 300 is exactly flush with the inner wall surface of the first half - mold 200.

[0030] See Figure 5 、 Figures 8 to 11, according to an embodiment of the present application, the end faces of the two second half-molds 300 facing each other respectively have jacks 302, and the sealing plate 400 has studs 402 for inserting into the corresponding jacks 302 of the second half-molds 300. Therefore, the sealing plate 400 can be plugged into the corresponding second half-mold 300. In order to increase the stability of the sealing plate 400 inserted into the second half-mold 300, a magnetic attraction structure (such as a magnet) can also be provided at the bottom of the jack 302 and the end of the stud 402.

[0031] In addition, the end faces of the two second half-molds 300 facing each other respectively have mounting grooves 303, and pressure sensors (not shown) are arranged in the mounting grooves 303. The pressure sensors are in contact with the bottom surface of the corresponding mounting grooves 303. When the two second half-molds 300 move closer to each other to the closed state, the pressure sensor in the mounting groove 303 of one second half-mold 300 is in contact with the end face of the other second half-mold 300. In this way, when the two second half-molds 300 are closed for blow molding a plastic bottle, the closing force between the second half-molds 300 can be sensed by the pressure sensor, so as to judge whether the preform in the second blow molding cavity 4 has been formed into a plastic bottle and outwardly support the second half-mold 300, so as to timely close the blow molding actuator, thus saving energy; when the second half-mold 300 is connected with the sealing plate 400, the pressure sensors in the mounting grooves 303 of each second half-mold 300 are in contact with the corresponding sealing plate 400. In this way, when the first half-mold 200 is closed for blow molding a plastic bottle, the closing force between the sealing plate 400 and the second half-mold 300 can be sensed by the pressure sensor, so as to judge whether the preform in the first blow molding cavity 2 has been formed into a plastic bottle and outwardly support the sealing plate 400, so as to timely close the blow molding actuator, thus saving energy.

[0032] According to an embodiment of the present application, the integrated blow molding equipment for waste recycling includes a liftable table 9 arranged on the base body 100. The liftable table 9 is driven to lift by a lifting cylinder 11 arranged on the top plate 102 of the base body 100. The blow molding actuator includes a compressed air spray pipe 10 arranged on the liftable table 9. A flow control electric valve is arranged on the compressed air spray pipe 10. The flow control electric valve can control the on-off and flow rate of the compressed air spray pipe 10. The flow control electric valve is in signal connection with the pressure sensor.

[0033] In addition, the extrusion device includes a heating device 12, a plastic granule feed hopper 13, a screw conveyor 14, and an extrusion die head 15. The input end of the screw conveyor 14 is connected to the plastic granule feed hopper 13. The plastic granule feed hopper 13 is used to receive the renewable plastic granules converted from waste plastics by a plastic granulator. The output end of the screw conveyor 14 is connected to the extrusion die head 15. A hollow parison is extruded from the outlet of the extrusion die head 15 (specifically, the outlet of the extrusion pipe 16 of the extrusion die head 15). The heating device 12 is arranged on the outer wall of the screw conveyor 14. Specifically, a plurality of heating devices 12 can be arranged around and covered on the outer wall of the screw conveyor 14. The integrated blow molding device for waste recycling also includes a moving drive device. Specifically, the moving drive device is an electric guide rail 17 arranged on the base 101. The mold table 7 is slidably arranged on the electric guide rail 17. The moving drive device can drive the mold to move between the parison receiving station and the blow molding station. At the parison receiving station, the mold is located below the outlet of the extrusion die head 15. At the blow molding station, the mold is located below the compressed air spray pipe 10. The extrusion device adopts known technology and will not be elaborated here. Of course, the integrated blow molding device for waste recycling may also include a plastic granulator (known technology, not shown) arranged on the base body 100.

[0034] According to another aspect of the present invention, there is also provided a blow molding method. In this method, the above-mentioned integrated blow molding device for waste recycling is used. The blow molding method includes a small-size plastic bottle blow molding method and a large-size plastic bottle blow molding method. The small-size plastic bottle blow molding method includes the following steps: S1. Make two second linear drive mechanisms 6 drive two second half molds 300 to move closer to each other one by one until they are in a closed state. S2. Make the moving drive device drive the mold to move to the parison receiving station, and align the outlet of the extrusion die head 15 with the second upper opening 3 of the second blow molding cavity 4, so that the parison extruded from the outlet of the extrusion die head 15 falls into the second blow molding cavity 4. S3. Make the moving drive device drive the mold to move to the blow molding station, and make the compressed air spray pipe 10 enter the second blow molding cavity 4 from the second upper opening 3 and extend into the parison in the second blow molding cavity 4. S4. Open the flow electronic control valve, and ventilate the compressed air spray pipe 10 to blow the parison in the second blow molding cavity 4 into a small-size plastic bottle. The large-size plastic bottle blow molding method includes the following steps: T1. Install sealing plates 400 on each second half mold 300, make two second linear drive mechanisms 6 drive two second half molds 300 to move away from each other one by one until they respectively extend into the inner walls of two first half molds 200, and make each sealing plate 400 flush with the inner wall surface of the corresponding first half mold 200. T2. Drive the two first linear drive mechanisms 5 to drive the two first half-molds 200 to move closer to each other to the closed state one by one; T3. Drive the mold to move to the preform receiving station by the moving drive device, align the outlet of the extrusion die head 15 with the first upper opening 1 of the first blow molding cavity 2, and make the preform extruded from the outlet of the extrusion die head 15 fall into the first blow molding cavity 2; T4. Drive the mold to move to the blow molding station by the moving drive device, and make the compressed air nozzle 10 enter the first blow molding cavity 2 from the first upper opening 1 and extend into the preform in the first blow molding cavity 2; T5. Open the flow control solenoid valve to supply air to the compressed air nozzle 10 to blow the preform in the first blow molding cavity 2 into a large-sized plastic bottle.

[0035] According to a preferred embodiment of the present application, the blow molding method includes: In step S4, when the pressure value of the pressure sensor is greater than the first preset value and lasts for the first preset time, close the flow control solenoid valve to stop blow molding, so as to avoid the phenomenon of wasting energy by continuing blow molding after the small-sized plastic bottle has been completely formed; In step T5, when the pressure value of the pressure sensor is greater than the second preset value and lasts for the second preset time, close the flow control solenoid valve to stop blow molding, so as to avoid the phenomenon of wasting energy by continuing blow molding after the large-sized plastic bottle has been completely formed.

[0036] It should be noted that the above embodiments only represent the preferred implementation modes of the present application, and the description is relatively specific and detailed, but it should not be construed as a limitation to the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can be made, such as combining different features in each embodiment, etc., and these should all belong to the protection scope of the present application.

Claims

1. An integrated blow molding device for recycling waste materials, characterized in that: The integrated blow molding equipment for recycling waste materials comprises: matrix; An extrusion device disposed on the base, the extrusion device being capable of receiving plastic particles produced by a plastic granulator and extruding the plastic particles into a hollow parison; A mold disposed on the base, the mold comprising two first half molds and two second half molds, the two first half molds being able to move away from each other and being able to move toward each other to a closed state to form a first blow molding cavity having a first upper opening, the two second half molds being able to move away from each other and being able to move toward each other to a closed state to form a second blow molding cavity having a second upper opening, the first blow molding cavity and the second blow molding cavity being different in size from each other, and both being able to receive a parison extruded by the extrusion device; The blow molding actuator arranged on the base is used for blow molding the parisons in the first blow molding cavity and the second blow molding cavity into plastic bottles.

2. The integrated blow molding equipment for recycling waste materials according to claim 1 is characterized in that: The integrated blow molding equipment for waste recycling includes two first linear drive mechanisms and two second linear drive mechanisms. The two first linear drive mechanisms are used to drive the two first half molds to move away from and towards each other in a one-to-one correspondence. The two second linear drive mechanisms are used to drive the two second half molds to move away from and towards each other in a one-to-one correspondence. The two second linear drive mechanisms pass through each of the first half molds in a one-to-one correspondence. The two second half molds are located between the two first half molds. When the two first half molds move towards each other to a closed state, the two second half molds can respectively extend into the inner walls of the two first half molds.

3. The integrated blow molding equipment for recycling waste materials according to claim 2 is characterized in that: The two second linear drive mechanisms are mounted on each of the first half molds in a one-to-one correspondence.

4. The integrated blow molding equipment for recycling waste materials according to claim 3 is characterized in that: The two first half molds respectively have first grooves facing each other. When the two first half molds move close to each other and to a closed state, the first grooves of the two first half molds are combined into the first blow molding cavity. The two second half molds respectively have second grooves facing each other. When the two second half molds move close to each other and to a closed state, the second grooves of the two second half molds are combined into the second blow molding cavity. The integrated blow molding equipment for waste recycling includes a sealing plate that can be detachably connected to the second half mold and close the second groove of the corresponding second half mold. When the two second half molds are connected with sealing plates and extend into the inner walls of the two first half molds respectively, the two sealing plates are flush with the inner wall surfaces of the corresponding first half molds.

5. The integrated blow molding equipment for recycling waste materials according to claim 4, characterized in that: The two second half molds have inserting holes on their end surfaces facing each other, and the sealing plate has inserting posts for inserting into the inserting holes of the corresponding second half molds.

6. The integrated blow molding equipment for recycling waste materials according to claim 5, characterized in that: The two second half molds have mounting grooves on their end surfaces facing each other, and each mounting groove is provided with a pressure sensor, and the pressure sensor contacts the bottom surface of the corresponding mounting groove. When the two second half molds move close to each other to a closed state, the pressure sensor in the mounting groove of one second half mold contacts the end surface of the other second half mold; when the second half mold is connected to a sealing plate, the pressure sensors in the mounting grooves of each second half mold contact the corresponding sealing plate.

7. The integrated blow molding equipment for recycling waste materials according to claim 6, characterized in that: The integrated blow molding equipment for recycling waste materials includes a liftable platform arranged on the base, and the blow molding actuator includes a compressed air nozzle arranged on the liftable platform. The compressed air nozzle is provided with a flow electric control valve, and the flow electric control valve can control the on-off and flow rate of the compressed air nozzle. The flow electric control valve is connected to the pressure sensor signal.

8. The integrated blow molding equipment for recycling waste materials according to claim 7, characterized in that: The extrusion device includes a heating device, a plastic pellet feed hopper, a screw conveyor and an extrusion die head. The input end of the screw conveyor is connected to the plastic pellet feed hopper, the output end of the screw conveyor is connected to the extrusion die head, the hollow parison is extruded from the outlet of the extrusion die head, the heating device is arranged on the outer wall of the screw conveyor, and the integrated blow molding equipment for waste recycling also includes a mobile driving device, which can drive the mold to move between a parison receiving station and a blow molding station. At the parison receiving station, the mold is located below the outlet of the extrusion die head, and at the blow molding station, the mold is located below the compressed air nozzle.

9. A blow molding method, characterized in that: The method is implemented by using the integrated blow molding equipment for recycling waste materials according to claim 8, wherein the blow molding method includes a small-sized plastic bottle blow molding method and a large-sized plastic bottle blow molding method; The small-size plastic bottle blow molding method comprises the steps of: S1, causing the two second linear drive mechanisms to drive the two second half molds to move closer to each other to a closed state in a one-to-one correspondence; S2, causing the moving drive device to drive the mold to move to the parison receiving station, and aligning the outlet of the extrusion die head with the second upper opening of the second blow molding cavity, so that the parison extruded from the outlet of the extrusion die head falls into the second blow molding cavity; S3, causing the moving drive device to drive the mold to move to the blow molding station, causing the compressed air nozzle to enter the second blow molding cavity from the second upper opening and extend into the parison in the second blow molding cavity; S4, opening the flow electric control valve to ventilate the compressed air nozzle to blow the parison in the second blow molding cavity into a small-sized plastic bottle; The large-size plastic bottle blow molding method comprises the following steps: T1, installing the sealing plate on each of the second half molds, so that the two second linear drive mechanisms drive the two second half molds to move away from each other in a one-to-one correspondence until they extend into the inner walls of the two first half molds respectively, and each sealing plate is flush with the inner wall surface of the corresponding first half mold; T2, causing the two first linear drive mechanisms to drive the two first half molds to move closer to each other to a closed state in a one-to-one correspondence; T3, driving the mold to move to the parison receiving station by the moving drive device, and aligning the outlet of the extrusion die head with the first upper opening of the first blow molding cavity, so that the parison extruded from the outlet of the extrusion die head falls into the first blow molding cavity; T4, causing the moving drive device to drive the mold to move to the blow molding station, causing the compressed air nozzle to enter the first blow molding cavity from the first upper opening and extend into the parison in the first blow molding cavity; T5. Open the flow electric control valve to ventilate the compressed air nozzle to blow the parison in the first blow molding cavity into a large-sized plastic bottle.

10. The blow molding method according to claim 9, characterized in that: The blow molding method comprises: In step S4, when the pressure value of the pressure sensor is greater than the first preset value and lasts for the first preset time, the flow electric control valve is closed to stop the blow molding; In step T5, when the pressure value of the pressure sensor is greater than the second preset value and lasts for the second preset time, the flow electric control valve is closed to stop the blow molding.

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