Degradable environment-friendly plastic packaging bag material and blow molding process thereof

Abstract

The invention discloses a degradable environment-friendly plastic packaging bag material and a blow molding process thereof, and relates to the technical field of plastic packaging bag molding.The degradable environment-friendly plastic packaging bag material comprises a bottom plate, a fixing frame is fixedly connected to the upper side of the bottom plate, a first electric push rod is fixedly connected to the upper side of the fixing frame, and a blow molding unit is arranged at the output end of the lower side of the first electric push rod; two fixing blocks and an air cooler are fixedly connected to the upper side of the bottom plate, second electric push rods are fixedly connected to the outer sides of the fixing blocks, a blowing mold is fixedly connected to the outer ends of the second electric push rods, an air outlet pipe is fixedly connected to the upper side of the blowing mold, and the blowing unit comprises a blowing machine. By arranging the blow molding machine, the stretching pipe and the blow molding cylinder, the blow molding machine can conveniently conduct blow molding treatment on molten materials, through the screw, the threaded cylinder, the blow molding pipeline, the cooling pipeline and the water tank, the blow molding pipeline can be conveniently controlled to descend, the interior of a packaging bag is rapidly cooled through the cooling pipeline, and the packaging bag is evenly cooled.

Description

Technical Field

[0001] This invention relates to the field of plastic packaging bag molding technology, specifically to a biodegradable and environmentally friendly plastic packaging bag material and its blow molding process. Background Technology

[0002] In simple terms, biodegradable and environmentally friendly plastic packaging bags are plastic packaging products that, based on traditional plastics, have been made possible through technological innovation so that they can be degraded by microorganisms under specific natural or artificial conditions, ultimately becoming harmless to the environment.

[0003] During the production of biodegradable and environmentally friendly plastic packaging bags, biodegradable and environmentally friendly materials are extruded through a screw extruder. After extrusion, the material is sheared, and then the molten material is poured into a mold. The material is then blow-molded using a blow molding machine to form the packaging bag. After blow molding, the packaging bag needs to be cooled down, usually using coolant or cold airflow. However, cooling only cools the outer surface of the packaging bag, leaving the inside uncooled. When processing thick packaging bags, uneven cooling can easily occur, requiring the packaging bag to cool naturally before the mold is opened, increasing the molding time.

[0004] Therefore, this invention proposes a biodegradable and environmentally friendly plastic packaging bag material and its blow molding process to solve the problems mentioned above. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a biodegradable and environmentally friendly plastic packaging bag material and its blow molding process, which solves the problem of poor internal cooling effect during the cooling process after the packaging bag blow molding is completed.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A blow molding process for biodegradable and environmentally friendly plastic packaging bag material includes a base plate, a fixed frame fixedly connected to the upper side of the base plate, an electric push rod fixedly connected to the upper side of the fixed frame, a blow molding unit set at the output end of the lower side of the electric push rod, two fixed blocks and a cooling fan fixedly connected to the upper side of the base plate, an electric push rod two fixedly connected to the outer side of the fixed blocks, a blow molding mold fixedly connected to the outer end of the electric push rod two, an air outlet pipe fixedly connected to the upper side of the blow molding mold, a blow molding machine including a blow molding machine fixedly connected to the output end of the lower side of the electric push rod, a stretching tube fixedly connected to the lower side of the blow molding machine, a blow molding cylinder fixedly connected to the outer side of the lower end of the stretching tube, multiple blow molding holes opened on the lower side of the blow molding cylinder, a branch pipe fixedly connected between the blow molding cylinder and the stretching tube, and a cooling component set inside the stretching tube for cooling inside the packaging bag.

[0007] Preferably, a connecting pipe is fixedly connected between the air cooler and the blow molding die. The cooling assembly includes a motor, which is fixedly connected to the inner side of the stretching tube. A screw is fixedly connected to the output end of the motor. A threaded cylinder is provided on the outer side of the screw. A blow molding pipe is fixedly connected to the lower end of the threaded cylinder. Multiple side grooves are opened on the outer side of the blow molding pipe. A control board is fixedly connected to the inner side of the side grooves. Two side blocks are fixedly connected to the outer side of the control board. A cooling pipe is fixedly connected between the two side blocks. A fixed cylinder is fixedly connected to the upper side of the blow molding cylinder. A base is fixedly connected to the lower end of the blow molding pipe.

[0008] Preferably, the inner side of the blow molding pipe is fixedly connected to an annular pipe one and an annular pipe two, the annular pipe two is fixedly connected to the cooling pipe and the cooling pipe three, the annular pipe one is fixedly connected to the cooling pipe and the cooling pipe two, the outer side of the annular pipe one is fixedly connected to a water inlet pipe, the outer side of the annular pipe two is fixedly connected to a water outlet pipe, the lower side of the blow molding machine is fixedly connected to a water tank, and the water tank is fixedly connected to the water inlet pipe.

[0009] Preferably, a fixing ring is fixedly connected to the inner side of the stretching tube, a sliding rod is fixedly connected to the upper side of the fixing ring, a lifting ring is fixedly connected to the outer side of the threaded cylinder, the screw is threadedly connected to the threaded cylinder, and the sliding rod is slidably connected to the lifting ring.

[0010] Preferably, the first annular pipe is located below the second annular pipe, and the outlet pipe and inlet pipe pass through the outside of the stretching pipe.

[0011] Preferably, a rectangular hole is provided on the inner side of the side groove, a top block is fixedly connected to the upper side of each of the multiple control plates, an inclined plate is rotatably connected to the outer side of the top block, a rotating block is rotatably connected to the outer side of the inclined plate, a control disk is fixedly connected to the upper side of the rotating block, an installation cylinder is fixedly connected to the inner side of the blow molding pipe, a piston disk is provided on the inner side of the installation cylinder, and a connecting rod is fixedly connected between the piston disk and the control disk.

[0012] Preferably, an air cylinder is fixedly connected to the upper side of the fixed ring, a movable piston is provided inside the air cylinder, a top pipe is fixedly connected to the upper side of the movable piston, a contact plate is fixedly connected to the upper end of the top pipe, a delivery pipe is fixedly connected between the air cylinder and the mounting cylinder, the contact plate is located below the lifting ring, and a spring is fixedly connected between the outer side of the movable piston and the upper side of the fixed ring.

[0013] A biodegradable and environmentally friendly plastic packaging bag material, wherein the material comprises, by weight, 60-70 parts PBAT, 20-30 parts corn starch, and 10-20 parts PLA.

[0014] This invention provides a biodegradable and environmentally friendly plastic packaging bag material and its blow molding process. Compared with the prior art, it has the following advantages: (1) By setting up a blow molding machine, stretching tube, and blow molding cylinder, the blow molding machine can easily blow molded the molten material. The blow molding pipe can be easily controlled to descend through the screw, threaded cylinder, blow molding pipe, cooling pipe and water tank, and the cooling pipe can quickly cool the inside of the packaging bag so that the packaging bag is cooled evenly.

[0015] (2) By setting up air cylinder, conveying pipe, inclined plate and control plate, multiple control plates can be rotated when the blow molding pipe descends, increasing the cooling range and facilitating rapid cooling of the packaging bag. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the blow molding unit in this invention; Figure 3 This is a three-dimensional cross-sectional view of the blow-molded tube in this invention; Figure 4 This is a partial three-dimensional structural diagram of the blow molding unit in this invention; Figure 5 for Figure 4 Enlarged view of point A in the middle; Figure 6 This is a three-dimensional cross-sectional view of the lifting pipe in this invention; Figure 7 for Figure 6 Enlarged view of point B in the middle; Figure 8 This is a three-dimensional cross-sectional view of the lifting pipe in this invention from another perspective; Figure 9 This is a cross-sectional perspective view of the air cylinder in this invention; Figure 10 for Figure 9 Enlarged view of point C in the middle.

[0017] In the diagram: 1. Base plate; 2. Fixing frame; 3. Electric push rod one; 4. Blow molding mold; 5. Air outlet pipe; 6. Blow molding unit; 7. Air cooler; 8. Connecting pipe one; 9. Fixing block; 10. Electric push rod two; 61. Blow molding machine; 62. Stretching pipe; 63. Water tank; 64. Blow molding cylinder; 65. Blow molding hole; 66. Fixing cylinder; 67. Branch pipe; 68. Motor; 69. Screw; 610. Water inlet pipe; 611. Water outlet pipe; 612. Threaded cylinder; 613. Blow molding pipe; 614. Lifting ring; 615. Fixing ring; 616. 617. Slide rod; 618. Chassis; 619. Annular tube one; 620. Annular tube two; 621. Side groove; 622. Rectangular hole; 623. Control panel; 624. Side block; 625. Cooling pipe; 626. Connecting pipe two; 627. Top block; 628. Inclined plate; 629. Rotating block; 630. Control panel; 631. Mounting cylinder; 632. Piston disc; 633. Connecting rod; 634. Air cylinder; 635. Moving piston; 636. Top pipe; 637. Contact plate; 638. Spring; 639. Connecting pipe three. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] This invention provides the following technical solutions: Example 1 Please see Figure 1 - Figure 8A blow molding process for biodegradable and environmentally friendly plastic packaging bag materials includes a base plate 1, a fixed frame 2 fixedly connected to the upper side of the base plate 1, an electric push rod 3 fixedly connected to the upper side of the fixed frame 2, a blow molding unit 6 provided at the lower output end of the electric push rod 3, two fixed blocks 9 and a cold air fan 7 fixedly connected to the upper side of the base plate 1, an electric push rod 10 fixedly connected to the outer side of the fixed blocks 9, a blow molding mold 4 fixedly connected to the outer end of the electric push rod 10, an air outlet pipe 5 fixedly connected to the upper side of the blow molding mold 4, and a blow molding machine 61 including a blow molding machine 61 fixedly connected to the lower output end of the electric push rod 3. A stretching tube 62 is fixedly connected to the lower side of the blow molding machine 61, and a blow molding cylinder 64 is fixedly connected to the outer side of the lower end of the stretching tube 62. Multiple blow molding holes 65 are provided on the lower side of the blow molding cylinder 64. A branch pipe 67 is fixedly connected between the plastic cylinder 64 and the stretching tube 62. A cooling component is provided on the inner side of the stretching tube 62 for cooling the packaging bag. During blow molding, the molten material is first poured into the blow molding mold 4. Then, the electric push rod 1 3 is controlled to drive the stretching tube 62 to descend. The stretching tube 62 drives the blow molding cylinder 64 to descend into the blow molding mold 4. Then, the stretching tube 62 is controlled to rise to stretch the material. At this time, the blow molding machine 61 is started. Under the action of the branch pipe 67, the blow molding hole 65 sprays out airflow to blow the material into shape. After molding, the cold air fans 7 on both sides are started. Under the action of the connecting pipe 1 8, cold air is blown into the blow molding mold 4 to cool the surface of the packaging bag. The airflow is discharged through the air outlet pipe 5. After molding is completed, the electric push rod 2 10 is controlled to move the blow molding mold 4 for easy demolding.

[0020] A connecting pipe 8 is fixedly connected between the air cooler 7 and the blow molding mold 4. The cooling assembly includes a motor 68, which is fixedly connected to the inner side of the stretching pipe 62. A screw 69 is fixedly connected to the output end of the motor 68. A threaded cylinder 612 is provided on the outer side of the screw 69. A blow molding pipe 613 is fixedly connected to the lower end of the threaded cylinder 612. Multiple side grooves 620 are opened on the outer side of the blow molding pipe 613. A control board 622 is fixedly connected to the inner side of the side grooves 620. Two side blocks 623 are fixedly connected to the outer side of the control board 622. A cooling pipe 624 is fixedly connected between the two side blocks 623. A fixed cylinder 66 is fixedly connected to the upper side of the cylinder 64. A base 617 is fixedly connected to the lower end of the blow molding pipe 613. Annular pipe 1 618 and annular pipe 2 619 are fixedly connected to the inner side of the blow molding pipe 613. A connecting pipe 3 639 is fixedly connected between annular pipe 2 619 and cooling pipe 624. A connecting pipe 2 625 is fixedly connected between annular pipe 1 618 and cooling pipe 624. A water inlet pipe 610 is fixedly connected to the outer side of annular pipe 1 618. A water outlet pipe 611 is fixedly connected to the outer side of annular pipe 2 619. A water tank 63 is fixedly connected to the lower side of the blow molding machine 61. The water tank 63 is connected to the water inlet pipe 61. The tube 610 is fixedly connected, and a fixing ring 615 is fixedly connected to the inner side of the stretching tube 62. A sliding rod 616 is fixedly connected to the upper side of the fixing ring 615. A lifting ring 614 is fixedly connected to the outer side of the threaded cylinder 612. The screw 69 is threadedly connected to the threaded cylinder 612, and the sliding rod 616 is slidably connected to the lifting ring 614. The first annular tube 618 is located below the second annular tube 619. The water outlet pipe 611 and the water inlet pipe 610 pass through the outer side of the stretching tube 62. After blow molding is completed, the motor 68 is started. The motor 68 drives the screw 69 to rotate, and the screw 69 drives the threaded cylinder 612 to descend. The threaded cylinder 612 carries... The blow molding pipe 613 descends, driving the cooling pipe 624 down into the packaging bag. The water tank 63 is equipped with a pump body connected to the inlet pipe 610, which draws out the cold water from the water tank 63 and allows it to enter the cooling pipe 624 through the inlet pipe 610, the first annular pipe 618, and the second connecting pipe 625. The cold water is then discharged through the outlet pipe 611 through the third connecting pipe 639 and the second annular pipe 619. The cold water carries away the heat from inside the packaging bag, cooling the inside of the bag. Combined with the air cooler 7, this allows for simultaneous cooling of both the inside and outside of the packaging bag, resulting in a better cooling effect.

[0021] Example 2 Based on Example 1, such as Figure 9 , Figure 10As shown, a rectangular hole 621 is opened on the inner side of the side groove 620. A top block 626 is fixedly connected to the upper side of multiple control plates 622. An inclined plate 627 is rotatably connected to the outer side of the top block 626. A rotating block 628 is rotatably connected to the outer side of the inclined plate 627. A control disk 629 is fixedly connected to the upper side of the rotating block 628. An installation cylinder 630 is fixedly connected to the inner side of the blow molding pipe 613. A piston disc 631 is provided inside the installation cylinder 630. A connecting rod 632 is fixedly connected between the piston disc 631 and the control disk 629. An air cylinder 634 is fixedly connected to the upper side of the fixing ring 615. A moving piston 635 is provided inside the air cylinder 634. A top pipe 636 is fixedly connected to the upper side of the moving piston 635. A contact plate 637 is fixedly connected to the upper end of the top pipe 636. A delivery pipe 633 is fixedly connected between the air cylinder 634 and the installation cylinder 630. The contact plate 637 is located at... Below the lifting ring 614, a spring 638 is fixedly connected between the outer side of the moving piston 635 and the upper side of the fixed ring 615. As the blow molding pipe 613 descends, the threaded cylinder 612 drives the lifting ring 614 to descend. When the lifting ring 614 contacts the contact plate 637, the contact plate 637 drives the top tube 636 to descend, and the top tube 636 drives the moving piston 635 to descend. Due to the gas in the air cylinder 634, the moving piston 635 squeezes out the gas in the air cylinder 634 and introduces the gas into the installation cylinder 630 through the delivery pipe 633, causing the gas to push the piston plate 631 to descend. The piston plate 631 drives the connecting rod 632 to descend, and the connecting rod 632 drives the control plate 629 to descend. The control plate 629 drives the inclined plate 627 to rotate, and the inclined plate 627 drives the control plate 622 to rotate. Multiple control plates 622 rotate simultaneously, increasing the cooling range of the cooling pipe 624.

[0022] A biodegradable and environmentally friendly plastic packaging bag material, comprising, by weight: 60-70 parts PBAT, 20-30 parts corn starch, and 10-20 parts PLA. Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0023] During operation, molten material is first poured into the blow molding mold 4. Then, the electric push rod 3 drives the stretching tube 62 to descend, causing the stretching tube 62 to lower the blow molding cylinder 64 into the blow molding mold 4. The stretching tube 62 is controlled to rise, controlling the material stretching. Through the blow molding machine 61, airflow is ejected from the blow molding hole 65, causing the packaging bag to be blow-molded. After molding, the cooling fan 7 is started to cool the outer surface of the packaging bag. At the same time, the motor 68 is started to drive the screw 69 to rotate. Under the action of the screw cylinder 612, the blow molding pipe 613 is controlled to descend. The blow molding pipe 613 drives the cooling pipe 624 to descend into the interior of the packaging bag, and the water tank 63 is activated. The pump body draws out external cold water, which enters the cooling pipe 624 under the action of the annular pipe 618 and the connecting pipe 625, facilitating the cooling of the packaging bag. When the threaded cylinder 612 drives the lifting ring 614 to descend and contact the contact plate 637, the lifting ring 614 drives the moving piston 635 to descend, squeezing out the gas in the air cylinder 634. Under the action of the conveying pipe 633 and the mounting cylinder 630, the piston plate 631 descends. The piston plate 631 drives the control plate 629 on the connecting rod 632 to descend. Under the action of the inclined plate 627, the cooling pipe 624 on the control plate 622 rotates, increasing the cooling range.

[0024] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0025] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A blow molding process for a biodegradable and environmentally friendly plastic packaging bag material, comprising a base plate (1), characterized in that: A fixed frame (2) is fixedly connected to the upper side of the base plate (1). An electric push rod (3) is fixedly connected to the upper side of the fixed frame (2). A blow molding unit (6) is provided at the lower output end of the electric push rod (3). Two fixed blocks (9) and a cold air blower (7) are fixedly connected to the upper side of the base plate (1). An electric push rod (10) is fixedly connected to the outer side of the fixed block (9). A blow molding mold (4) is fixedly connected to the outer end of the electric push rod (10). An air outlet pipe (5) is fixedly connected to the upper side of the blow molding mold (4). The blow molding unit... The unit (6) includes a blow molding machine (61), which is fixedly connected to the output end of the electric push rod (3) on the lower side. A stretching tube (62) is fixedly connected to the lower side of the blow molding machine (61). A blow molding cylinder (64) is fixedly connected to the outer side of the lower end of the stretching tube (62). A plurality of blow molding holes (65) are opened on the lower side of the blow molding cylinder (64). A branch pipe (67) is fixedly connected between the blow molding cylinder (64) and the stretching tube (62). A cooling component is provided on the inner side of the stretching tube (62). The cooling component is used for cooling inside the packaging bag.

2. The blow molding process for a biodegradable and environmentally friendly plastic packaging bag material according to claim 1, characterized in that: A connecting pipe (8) is fixedly connected between the air cooler (7) and the blow molding die (4). The cooling assembly includes a motor (68). The motor (68) is fixedly connected to the inner side of the stretching tube (62). A screw (69) is fixedly connected to the output end of the motor (68). A threaded cylinder (612) is provided on the outer side of the screw (69). A blow molding pipe (613) is fixedly connected to the lower end of the threaded cylinder (612). Multiple side grooves (620) are opened on the outer side of the blow molding pipe (613). A control board (622) is fixedly connected to the inner side of the side groove (620). Two side blocks (623) are fixedly connected to the outer side of the control board (622). A cooling pipe (624) is fixedly connected between the two side blocks (623). A fixed cylinder (66) is fixedly connected to the upper side of the blow molding cylinder (64). A chassis (617) is fixedly connected to the lower end of the blow molding pipe (613).

3. The blow molding process for a biodegradable and environmentally friendly plastic packaging bag material according to claim 2, characterized in that: The inner side of the blow molding pipe (613) is fixedly connected to an annular pipe one (618) and an annular pipe two (619). The annular pipe two (619) is fixedly connected to the cooling pipe (624) and the connecting pipe three (639). The annular pipe one (618) is fixedly connected to the cooling pipe (624) and the connecting pipe two (625). The outer side of the annular pipe one (618) is fixedly connected to a water inlet pipe (610). The outer side of the annular pipe two (619) is fixedly connected to a water outlet pipe (611). The lower side of the blow molding machine (61) is fixedly connected to a water tank (63). The water tank (63) is fixedly connected to the water inlet pipe (610).

4. The blow molding process for a biodegradable and environmentally friendly plastic packaging bag material according to claim 3, characterized in that: A fixing ring (615) is fixedly connected to the inner side of the stretching tube (62), a slide rod (616) is fixedly connected to the upper side of the fixing ring (615), a lifting ring (614) is fixedly connected to the outer side of the threaded cylinder (612), the screw (69) is threadedly connected to the threaded cylinder (612), and the slide rod (616) is slidably connected to the lifting ring (614).

5. The blow molding process for a biodegradable and environmentally friendly plastic packaging bag material according to claim 4, characterized in that: The first annular pipe (618) is located below the second annular pipe (619), and the outlet pipe (611) and inlet pipe (610) pass through the outside of the tension pipe (62).

6. The blow molding process for a biodegradable and environmentally friendly plastic packaging bag material according to claim 5, characterized in that: A rectangular hole (621) is provided on the inner side of the side groove (620). A top block (626) is fixedly connected to the upper side of each of the multiple control plates (622). An inclined plate (627) is rotatably connected to the outer side of the top block (626). A rotating block (628) is rotatably connected to the outer side of the inclined plate (627). A control disk (629) is fixedly connected to the upper side of the rotating block (628). An installation cylinder (630) is fixedly connected to the inner side of the blow molding pipe (613). A piston disk (631) is provided on the inner side of the installation cylinder (630). A connecting rod (632) is fixedly connected between the piston disk (631) and the control disk (629).

7. The blow molding process for a biodegradable and environmentally friendly plastic packaging bag material according to claim 7, characterized in that: An air cylinder (634) is fixedly connected to the upper side of the fixed ring (615). A movable piston (635) is provided inside the air cylinder (634). A top pipe (636) is fixedly connected to the upper side of the movable piston (635). A contact plate (637) is fixedly connected to the upper end of the top pipe (636). A delivery pipe (633) is fixedly connected between the air cylinder (634) and the mounting cylinder (630). The contact plate (637) is located below the lifting ring (614). A spring (638) is fixedly connected between the outer side of the movable piston (635) and the upper side of the fixed ring (615).

8. A biodegradable and environmentally friendly plastic packaging bag material, wherein the blow molding process for the biodegradable and environmentally friendly plastic packaging bag material according to claim 7 is characterized in that, The materials, by weight, include: 60-70 parts PBAT, 20-30 parts corn starch, and 10-20 parts PLA.

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