Double-layer vacuum plastic bottle

Abstract

A double-layer vacuum plastic bottle is prepared by the following steps: firstly, performing injection molding on an outer green body (5) and an inner green body (6), secondly, performing blow molding on the outer green body (5) to form an outer shell (1), then, inserting a second mold core (8) and the inner green body (6) into the outer shell (1), tightly jointing a bottle opening of the inner green body (6) with a bottle opening of the outer shell (1) to form a sealed hollow interlayer (4), performing blow molding on the inner green body (6) in the outer shell (1) to form an inner shell (2), and finally, performing injection molding on the inner shell (2). Air in the hollow interlayer (4) of the outer shell (1) and the inner shell (2) is pumped to form vacuum, and finally, a sealing ring (3) is formed by injection molding to seal and fix the outer shell (1) and the inner shell (2), so that the integrated double-layer vacuum plastic bottle is formed. The double-layer vacuum plastic bottle has the advantages of being good in heat preservation and fresh keeping effect, resistant to impact, convenient to process and low in price.

Description

Technical Field

[0001] The invention belongs to the technical field of plastic bottles, and in particular relates to a double-layer vacuum plastic bottle. Background Art

[0002] Plastic bottles have many advantages of plastic products, such as being not easy to break, low cost, high transparency, and made of food-grade raw materials. Plastic bottles are a commonly used container, widely used in carbonated beverages, drinking water, juice, enzymes and tea, medical liquid containers, beverage containers, seasoning containers, etc., and the demand is very large.

[0003] Although the existing plastic bottle also has double-layer hollow, its middle layer is not vacuum, and the heat preservation and fresh-keeping effect is poor. Therefore, it is necessary to study and improve the plastic bottle, and develop a double-layer vacuum plastic bottle with good heat preservation and fresh-keeping effect, impact resistance, convenient processing and low price. SUMMARY OF THE INVENTION Solving technical problems

[0004] In view of the deficiencies in the prior art, the present invention provides a double-layer vacuum plastic bottle. First, an outer blank and an inner blank are injection molded. Next, the outer blank is blow molded into an outer shell. Then, a second mold core and the inner blank are inserted into the outer shell. The bottle mouth of the inner blank is tightly engaged with the bottle mouth of the outer shell to form a sealed hollow interlayer. The inner blank is blow molded into an inner shell in the outer shell. Next, the air in the hollow interlayer of the outer shell and the inner shell is evacuated to form a vacuum. Finally, a sealing ring is injection molded to seal and fix the outer shell and the inner shell to form an integrated double-layer vacuum plastic bottle. The double-layer vacuum plastic bottle has the advantages of good heat preservation and fresh-keeping effects, impact resistance, convenient processing and low price. Technical Solutions

[0005] To achieve the above objectives, the present invention is implemented through the following technical scheme: a blast dual-channel grain conveyor, characterized in that: first, an outer blank and an inner blank are injection molded, and secondly, the outer blank is blow-molded into an outer shell, and then, a second mold core and an inner blank are inserted into the outer shell, the bottle mouth of the inner blank is tightly joined with the bottle mouth of the outer shell to form a sealed hollow interlayer, and the inner blank is blow-molded into an inner shell in the outer shell, and then, the air in the hollow interlayer of the outer shell and the inner shell is evacuated to form a vacuum, and finally, a sealing ring is injection molded to seal and fix the outer shell and the inner shell to form an integrated double-layer vacuum plastic bottle.

[0006] Preferably, the first fixed mold, the first movable mold, the first slider, the second slider and the first mold core constitute the mold cavity of the outer blank, and the first fixed mold, the first movable mold and the second mold core constitute the mold cavity of the outer blank, and the outer blank and the inner blank are injection molded in the mold cavity.

[0007] Preferably, the first insert is assembled in the first mold core to form a sealed first oil channel, the oil circuit flows, the outer blank is wrapped on the first mold core, the temperature of the first mold core is controlled by the oil temperature, and the temperature of the outer blank is adjusted;

[0008] The second insert is assembled in the second mold core to form a sealed second oil channel, the oil circuit flows, the inner blank is wrapped on the second mold core, the temperature of the second mold core is controlled by the oil temperature, and the temperature of the inner blank is adjusted.

[0009] Preferably, the first mold cavity, the second mold cavity and the third mold cavity constitute a shell blow molding mold cavity;

[0010] The first motor drives the first mold cavity forward, the second motor drives the second mold cavity forward, the third motor drives the third mold cavity upward, the first mold core, the outer blank, the first slide block and the second slide block downward, and the shell blow molding mold cavity is closed;

[0011] The sixth motor drives the fourth top block to move forward, and the fourth top block pushes the first top block forward, and the first top block drives the first fixed block and the first inserting pin to move downward, and the cone at the front end of the first inserting pin leaves the conical hole at the front end of the first mold core, and the groove on the first inserting pin is connected with the conical gap to form a first air channel;

[0012] Air is blown into the outer blank through the first air channel to form an outer shell. After cooling and shaping, the first motor drives the first mold cavity to retreat, the second motor drives the second mold cavity to retreat, and the third motor drives the third mold cavity downward to open the outer shell blow molding cavity.

[0013] Preferably, the fourth motor drives the first manipulator to translate, and the first manipulator grabs the first slider and the second slider;

[0014] The first mold core and the second mold core are mounted on the second workbench, and the tenth motor drives the second workbench, the first mold core and the second mold core to move upward, so that the first mold core is pulled out of the housing;

[0015] The fourth motor drives the first manipulator, the housing, the first slider and the second slider to translate onto the first receiving platform, the first manipulator returns, and the housing, the first slider and the second slider remain on the first receiving platform;

[0016] The tenth motor drives the second mold core to move downward, so that the second mold core and the inner blank are inserted into the outer shell, so that the bottle mouth of the inner blank is tightly combined with the bottle mouth of the outer shell;

[0017] The fifth motor drives the third top block forward, and the third top block pushes the second top block forward. The second top block drives the second fixed block and the second inlay pin downward, and the cone at the front end of the second inlay pin leaves the conical hole at the front end of the second mold core. The groove on the second inlay pin is connected with the conical gap to form a second air channel. Air is blown into the inner blank through the second air channel, and air is blown into the interlayer through the third air channel. The air pressure difference is used to adjust the interlayer gap distance between the outer shell and the inner shell, and the inner blank is blow-molded into the inner shell, which is then cooled and shaped.

[0018] Preferably, the air in the interlayer is evacuated through the third air channel, so that the hollow interlayer between the outer shell and the inner shell forms a vacuum;

[0019] The seventh motor drives the slide table forward, the right manipulator grabs the first slide block, and the left manipulator grabs the second slide block;

[0020] The eighth motor drives the right manipulator and the left manipulator to move outward synchronously, so that the first slider and the second slider move outward synchronously, so that the first slider and the second slider are separated from the bottle mouth of the shell;

[0021] The ninth motor drives the fifth top block to move forward, and the fifth top block pushes and rotates the plug, so that the plug quickly blocks the opening after the first slider is pulled out, and blocks the opening of the third air channel on the bottle mouth of the shell;

[0022] The tenth motor drives the second mold core to move upward, the seventh motor and the eighth motor drive the first slider and the second slider to move to the second receiving platform, the first slider and the second slider remain on the second receiving platform, and the seventh motor drives the right manipulator and the left manipulator to return.

[0023] Preferably, the second fixed mold, the second movable mold, the outer shell and the inner shell form a mold cavity of the sealing ring, and the sealing ring is injection molded in the mold cavity to seal and fix the outer shell and the inner shell to form an integrated double-layer vacuum plastic bottle;

[0024] The tenth motor drives the second mold core to move upward, and the second mold core is separated from the inner shell;

[0025] The injection molding machine opens the mold, opens the second fixed mold and the second movable mold, and the double-layer vacuum plastic bottles fall onto the conveyor belt, which outputs the plastic bottles.

[0026] Preferably, the tenth motor drives the first workbench, the second workbench, the third workbench and the fourth workbench to rise;

[0027] The eleventh motor drives the first workbench, the second workbench, the third workbench and the fourth workbench to rotate 90 degrees, so that the first workbench rotates to the position of the second workbench, the second workbench rotates to the position of the third workbench, the third workbench rotates to the position of the fourth workbench, and the fourth workbench rotates to the position of the first workbench;

[0028] The tenth motor drives the first workbench, the second workbench, the third workbench and the fourth workbench to descend;

[0029] The blank is injection molded on the first workbench, blow molded on the second workbench, vacuum is extracted on the third workbench, and the sealing ring is injection molded on the fourth workbench. The workbench rises, rotates 90 degrees, and then descends in a rotation cycle to continuously produce double-layer vacuum plastic bottles. Beneficial Effects

[0030] The present invention provides a double-layer vacuum plastic bottle, which has the following beneficial effects:

[0031] A double-layer vacuum plastic bottle comprises: firstly, an outer blank and an inner blank are injection molded; secondly, the outer blank is blow molded into an outer shell; then, a second mold core and the inner blank are inserted into the outer shell; the bottle mouth of the inner blank is tightly joined with the bottle mouth of the outer shell to form a sealed hollow interlayer; the inner blank is blow molded into an inner shell in the outer shell; then, the air in the hollow interlayer of the outer shell and the inner shell is evacuated to form a vacuum; finally, a sealing ring is injection molded to seal and fix the outer shell and the inner shell to form an integrated double-layer vacuum plastic bottle; the double-layer vacuum plastic bottle has the advantages of good heat preservation and fresh-keeping effects, impact resistance, convenient processing and low price. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a cross-sectional view of a plastic bottle of the present invention;

[0033] Figure 2 It is a partial schematic diagram of the present invention;

[0034] Figure 3-4 is a partial cross-sectional view of the present invention;

[0035] Figure 5 It is a partial schematic diagram of the present invention;

[0036] Figure 6 is a partial cross-sectional view of the present invention;

[0037] Figure 7-12 It is a partial schematic diagram of the structure of the present invention;

[0038] Fig.13 is a partial cross-sectional view of the present invention;

[0039] Figure 14-15 It is a schematic diagram of the overall structure of the present invention;

[0040] In the accompanying drawings: 1, outer shell; 2, inner shell; 3, sealing ring; 4, interlayer; 5, outer blank; 6, inner blank; 7, first mold core; 8, second mold core; 9, first fixed mold; 10, first movable mold; 11, second insert; 12, second insert pin; 13, second top block; 14, second fixed block; 15, second spring; 16, second oil channel; 17, second air channel; 18, first insert; 19, first insert pin; 20, first top block; 21, first fixed block; 22, first spring; 23, first oil channel; 24, first air channel; 25, first slider; 26, second slider; 27, third air channel; 28, first motor; 29, first mold cavity; 30 , second motor; 31, second cavity; 32, third motor; 33, third cavity; 34, fourth motor; 35, first manipulator; 36, fifth motor; 37, third top block; 38, sixth motor; 39, fourth top block; 40, first receiving platform; 41, second receiving platform; 42, seventh motor; 43, slide; 44, eighth motor; 45, right manipulator; 46, left manipulator; 47, ninth motor; 48, fifth top block; 49, plug; 50, second fixed mold; 51, second movable mold; 52, tenth motor; 53, eleventh motor; 54, first workbench; 55, second workbench; 56, third workbench; 57, fourth workbench; 58, conveyor belt. DETAILED DESCRIPTION

[0041] The accompanying drawings in the examples of the present invention are used below to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation cases described are only part of the embodiments of the present invention, not all of the implementation cases. Based on the implementation cases in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the present invention.

[0042] like Figure 1-15 As shown, the present invention provides a technical solution: first, an outer blank 5 and an inner blank 6 are injection molded, and then the outer blank 5 is blow molded into an outer shell 1. Then, a second mold core 8 and an inner blank 6 are inserted into the outer shell 1, and the bottle mouth of the inner blank 6 is tightly joined with the bottle mouth of the outer shell 1 to form a sealed hollow interlayer 4. The inner blank 6 is blow molded into an inner shell 2 in the outer shell 1. Next, the air in the hollow interlayer 4 between the outer shell 1 and the inner shell 2 is evacuated to form a vacuum. Finally, a sealing ring 3 is injection molded to seal and fix the outer shell 1 and the inner shell 2 to form an integrated double-layer vacuum plastic bottle.

[0043] The first fixed mold 9, the first movable mold 10, the first slider 25, the second slider 26 and the first mold core 7 constitute the mold cavity of the outer blank 5. The first fixed mold 9, the first movable mold 10, and the second mold core 8 constitute the mold cavity of the outer blank 5. The outer blank 5 and the inner blank 6 are injection molded in the mold cavity.

[0044] The first insert 18 is assembled in the first mold core 7 to form a sealed first oil channel 24, through which the oil loop flows, and the outer blank 5 is wrapped on the first mold core 7. The temperature of the first mold core 7 is controlled by the temperature of the oil, and the temperature of the outer blank 5 is adjusted;

[0045] The second insert 12 is assembled in the second mold core 8 to form a sealed second oil channel 16. The oil circuit flows, and the inner blank 6 is wrapped on the second mold core 8. The temperature of the second mold core 8 is controlled by the oil temperature to adjust the temperature of the inner blank 6.

[0046] The first mold cavity 29, the second mold cavity 31 and the third mold cavity 33 constitute the blow molding mold cavity of the shell 1;

[0047] The first motor 28 drives the first mold cavity 29 forward, the second motor 30 drives the second mold cavity 31 forward, the third motor 32 drives the third mold cavity 33 upward, the first mold core 7, the outer blank 5, the first slide block 25 and the second slide block 26 move downward, and the blow molding cavity of the shell 1 is closed;

[0048] The sixth motor 38 drives the fourth top block 39 to move forward, and the fourth top block 39 pushes the first top block 20 forward, and the first top block 20 drives the first fixed block 21 and the first inserting pin 19 to move downward, and the cone at the front end of the first inserting pin 19 leaves the conical hole at the front end of the first mold core 7 to form a gap, and the groove on the first inserting pin 19 is connected with the conical gap to form a first air channel 24;

[0049] Air is blown into the outer blank 5 through the first air channel 24 to blow-mold the outer shell 1. After cooling and shaping, the first motor 28 drives the first mold cavity 29 to retreat, the second motor 30 drives the second mold cavity 31 to retreat, and the third motor 32 drives the third mold cavity 33 downward to open the blow-molding mold cavity of the outer shell 1.

[0050] The fourth motor 34 drives the first manipulator 35 to translate, and the first manipulator 35 grabs the first slider 25 and the second slider 26;

[0051] The first mold core 7 and the second mold core 8 are mounted on the second workbench 55, and the tenth motor 52 drives the second workbench 55, the first mold core 7 and the second mold core 8 to move upward, so that the first mold core 7 is pulled out of the housing 1;

[0052] The fourth motor 34 drives the first manipulator 35, the housing 1, the first slider 25 and the second slider 26 to translate onto the first receiving platform 40, and the first manipulator 35 returns, and the housing 1, the first slider 25 and the second slider 26 remain on the first receiving platform 40;

[0053] The tenth motor 52 drives the second mold core 8 to move downward, so that the second mold core 8 and the inner blank 6 are inserted into the outer shell 1, so that the bottle mouth of the inner blank 6 is tightly combined with the bottle mouth of the outer shell 1;

[0054] The fifth motor 36 drives the third top block 37 to move forward, and the third top block 37 pushes the second top block 13 forward, and the second top block 13 drives the second fixed block 14 and the second inserting pin 12 to move downward, and the cone at the front end of the second inserting pin 12 leaves the conical hole at the front end of the second mold core 8, and the groove on the second inserting pin 12 is connected with the conical gap to form a second air channel 17;

[0055] Air is blown into the inner blank 6 through the second air channel 17, and air is blown into the interlayer 4 through the third air channel 27. The gap distance between the outer shell 1 and the interlayer 4 of the inner shell 2 is adjusted by the air pressure difference, and the inner blank 6 is blow-molded into the inner shell 1, which is then cooled and shaped.

[0056] The air in the interlayer 4 is extracted through the third air channel 27, so that the hollow interlayer 4 between the outer shell 1 and the inner 2 forms a vacuum;

[0057] The seventh motor 42 drives the slide 43 forward, the right manipulator 45 grabs the first slider 25, and the left manipulator 46 grabs the second slider 26;

[0058] The eighth motor 44 drives the right manipulator 45 and the left manipulator 46 to move outward synchronously, so that the first slider 25 and the second slider 26 move outward synchronously, so that the first slider 25 and the second slider 26 are separated from the bottle mouth of the housing 1;

[0059] The ninth motor 47 drives the fifth push block 48 to move forward, and the fifth push block 48 pushes the plug 49, so that the plug 49 quickly blocks the opening of the first slider 25 after it is pulled out; and blocks the opening of the third air channel 27 on the bottle mouth of the shell 1;

[0060] The tenth motor 52 drives the second mold core 8 to move upward, the seventh motor 42 and the eighth motor 44 drive the first slider 25 and the second slider 26 to move to the second receiving platform 41, the first slider 25 and the second slider 26 remain on the second receiving platform 41, and the seventh motor 42 drives the right manipulator 45 and the left manipulator 46 to return.

[0061] The second fixed mold 50, the second movable mold 51, the outer shell 1 and the inner shell 2 form a mold cavity for the sealing ring 5, and the sealing ring 5 is injection molded in the mold cavity to seal and fix the outer shell 1 and the inner shell 2 to form an integrated double-layer vacuum plastic bottle;

[0062] The tenth motor 52 drives the second mold core 8 to move upward, and the second mold core 8 is separated from the inner shell 2;

[0063] The injection molding machine opens the mold, opens the second fixed mold 50 and the second movable mold 51, and the double-layer vacuum plastic bottles fall onto the conveyor belt 58, and the conveyor belt 58 outputs the plastic bottles.

[0064] A set of first mold core 8 and second mold core 9 is installed under each of the four workbenches, with a total of four sets. The processes under the four workbenches are carried out simultaneously. When production starts, the first mold only injects the outer blank 5, and the second mold starts to inject the outer blank 5 and the inner blank 6. The outer shell 1 blown by each mold is used for the inner blank 6 of the next mold. The first slider 25 and the second slider 26 move from under the first mold core 7 to under the second mold core 8 during blow molding. After vacuuming, the first slider 25 and the second slider 26 return to the first mold core 7;

[0065] The tenth motor 52 drives the first working table 54, the second working table 55, the third working table 56 and the fourth working table 57 to rise;

[0066] The eleventh motor 52 drives the first workbench 54, the second workbench 55, the third workbench 56 and the fourth workbench 57 to rotate 90 degrees, so that the first workbench 54 rotates to the position of the second workbench 55, the second workbench 55 rotates to the position of the third workbench 56, the third workbench 56 rotates to the position of the fourth workbench 57, and the fourth workbench 57 rotates to the position of the first workbench 54;

[0067] The tenth motor drives 52 the first working table 54, the second working table 55, the third working table 56 and the fourth working table 57 to descend;

[0068] The blank is injection molded on the first workbench 54, blow molded on the second workbench 55, vacuum is extracted on the third workbench 56, and the sealing ring 5 is injection molded on the fourth workbench 57. The workbench rises, rotates 90 degrees, and descends in a rotation cycle to continuously produce double-layer vacuum plastic bottles.

[0069] The above are only preferred feasible implementation cases of the present invention, and do not limit the protection scope of the present invention. Various modifications or applications made according to the above examples are within the protection scope of this technical solution.

Claims

1. A double-layer vacuum plastic bottle, characterized in that: First, the outer blank (5) and the inner blank (6) are injection molded, and then the outer blank (5) is blow molded into the outer shell (1), and then the second mold core (8) is The inner blank (6) is inserted into the outer shell (1), and the bottle mouth of the inner blank (6) is tightly connected with the bottle mouth of the outer shell (1). The inner blank (6) is blow-molded into the outer shell (1) to form the inner shell (2). Then, the air in the hollow sandwich (4) between the outer shell (1) and the inner shell (2) is evacuated to form a vacuum. Finally, a sealing ring (3) is injection molded to seal and fix the outer shell (1) and the inner shell (2) to form an integrated double-layer vacuum plastic bottle.

2. A double-layer vacuum plastic bottle according to claim 1, characterized in that: The first fixed mold (9), the first movable mold (10), the first slider (25), the second slider (26) and the first mold core (7) form a mold cavity for the outer blank (5); the first fixed mold (9), the first movable mold (10) and the second mold core (8) form a mold cavity for the outer blank (5); and the outer blank (5) and the inner blank (6) are injection molded in the mold cavity.

3. A double-layer vacuum plastic bottle according to claim 1, characterized in that: The first insert (18) is assembled in the first mold core (7) to form a sealed first oil channel (24), the oil circuit flows, the outer blank (5) is wrapped on the first mold core (7), the temperature of the first mold core (7) is controlled by the temperature of the oil, and the temperature of the outer blank (5) is adjusted; The second insert (12) is assembled in the second mold core (8) to form a sealed second oil channel (16), the oil circuit flows, the inner blank (6) is wrapped on the second mold core (8), the temperature of the second mold core (8) is controlled by the oil temperature, and the temperature of the inner blank (6) is adjusted.

4. A double-layer vacuum plastic bottle according to claim 1, characterized in that: The first mold cavity (29), the second mold cavity (31) and the third mold cavity (33) constitute a blow molding mold cavity of the shell (1); The first motor (28) drives the first mold cavity (29) to move forward, and the second motor (30) drives the second mold cavity (31) The third motor (32) drives the third mold cavity (33) upward, and the first mold core (7), the outer blank (5), the first slide block (25) and the second slide block (26) move downward to close the shell (1) blow mold cavity; The sixth motor (38) drives the fourth top block (39) to move forward, the fourth top block (39) pushes the first top block (20) forward, the first top block (20) drives the first fixed block (21) and the first inserting needle (19) to move downward, the cone at the front end of the first inserting needle (19) leaves the conical hole at the front end of the first mold core (7) to form a gap, and the groove on the first inserting needle (19) is connected to the conical gap to form a first air channel (24); Air is blown into the outer blank (5) through the first air channel (24) to form the outer shell (1). After cooling and shaping, the first motor (28) drives the first mold cavity (29) to retreat, the second motor (30) drives the second mold cavity (31) to retreat, and the third motor (32) drives the third mold cavity (33) to move downward, thereby opening the outer shell (1) blow-molding mold cavity.

5. A double-layer vacuum plastic bottle according to claim 1, characterized in that: The fourth motor (34) drives the first manipulator (35) to translate, and the first manipulator (35) grabs the first slider (25) and the second slider (26); The first mold core (7) and the second mold core (8) are mounted on a second workbench (55); a tenth motor (52) drives the second workbench (55), the first mold core (7) and the second mold core (8) to move upward, so that the first mold core (7) is pulled out of the housing (1); The fourth motor (34) drives the first manipulator (35), the housing (1), the first slider (25) and the second slider (26) to translate onto the first receiving platform (40), the first manipulator (35) returns, and the housing (1), the first slider (25) and the second slider (26) remain on the first receiving platform (40); The tenth motor (52) drives the second mold core (8) to move downward, so that the second mold core (8) and the inner blank (6) are inserted into the outer shell (1), so that the bottle mouth of the inner blank (6) and the bottle mouth of the outer shell (1) are tightly combined together; The fifth motor (36) drives the third top block (37) to move forward, the third top block (37) pushes the second top block (13) forward, the second top block (13) drives the second fixed block (14) and the second inserting pin (12) to move downward, the cone at the front end of the second inserting pin (12) leaves the conical hole at the front end of the second mold core (8), the groove on the second inserting pin (12) is connected with the conical gap, and a second air passage (17) is formed; Air is blown into the inner blank (6) through the second air channel (17), and air is blown into the interlayer (4) through the third air channel (27). The gap between the outer shell (1) and the interlayer (4) of the inner shell (2) is adjusted by the air pressure difference, and the inner blank (6) is blow-molded into the inner shell (1), which is then cooled and shaped.

6. A double-layer vacuum plastic bottle according to claim 1, characterized in that: The air in the interlayer (4) is extracted through the third air channel (27), so that a vacuum is formed in the hollow interlayer (4) between the outer shell (1) and the inner shell (2); The seventh motor (42) drives the slide table (43) forward, the right manipulator (45) grabs the first slider (25), and the left manipulator (46) grabs the second slider (26); The eighth motor (44) drives the right manipulator (45) and the left manipulator (46) to move outward synchronously, so that the first slider (25) and the second slider (26) move outward synchronously, so that the first slider (25) and the second slider (26) are separated from the bottle mouth of the shell (1); The ninth motor (47) drives the fifth push block (48) to move forward, and the fifth push block (48) pushes the plug (49) to quickly plug the opening of the first slider (25) after it is pulled out, thereby plugging the opening of the third air passage (27) on the bottle mouth of the shell (1); The tenth motor (52) drives the second mold core (8) to move upward, the seventh motor (42) and the eighth motor (44) drive the first slider (25) and the second slider (26) to move to the second receiving platform (41), the first slider (25) and the second slider (26) remain on the second receiving platform (41), and the seventh motor (42) drives the right manipulator (45) and the left manipulator (46) to return.

7. A double-layer vacuum plastic bottle according to claim 1, characterized in that: The second fixed mold (50), the second movable mold (51), the outer shell (1) and the inner shell (2) form a mold cavity for the sealing ring (5), and the sealing ring (5) is injection molded in the mold cavity to seal and fix the outer shell (1) and the inner shell (2) to form an integrated double-layer vacuum plastic bottle; The tenth motor (52) drives the second mold core (8) to move upward, and the second mold core (8) is separated from the inner shell (2); The injection molding machine opens the mold, opens the second fixed mold (50) and the second movable mold (51), and the double-layer vacuum plastic bottle falls onto the conveyor belt (58), and the conveyor belt (58) outputs the plastic bottle.

8. A double-layer vacuum plastic bottle according to claim 1, characterized in that: The tenth motor (52) drives the first working table (54), the second working table (55), the third working table (56) and the fourth working table (57) to rise; The eleventh motor (52) drives the first workbench (54), the second workbench (55), the third workbench (56) and the fourth workbench (57) to rotate 90 degrees, so that the first workbench (54) rotates to the position of the second workbench (55), the second workbench (55) rotates to the position of the third workbench (56), the third workbench (56) rotates to the position of the fourth workbench (57), and the fourth workbench (57) rotates to the position of the first workbench (54); The tenth motor (52) drives the first working table (54), the second working table (55), the third working table (56) and the fourth working table (57) to descend; The blank is injection molded on the first workbench (54), blow molded on the second workbench (55), vacuum is drawn on the third workbench (56), and a sealing ring (5) is injection molded on the fourth workbench (57). The workbench rises, rotates 90 degrees, and then descends in a rotation cycle to continuously produce double-layer vacuum plastic bottles.

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