An injection molding device for PET cosmetic bottles

Abstract

The present invention belongs to the technical field of packaging bottle production, and specifically relates to an injection molding device for a PET cosmetic bottle, comprising an injection molding machine body and a conveyor belt, the injection molding machine body comprising a movable mold, a fixed mold and a stripper plate, the conveyor belt is installed on the front side of the injection molding machine body, a moving platform controlled by a first screw is slidably mounted inside the injection molding machine body, a blanking plate is installed on the upper side of the moving platform, a first clamping plate and a second clamping plate are slidably mounted on one side of the blanking plate, a motor is installed in the injection molding machine body, a transmission member is provided between the motor and the first screw, and the injection molding machine body is provided with a rotating assembly matching the blanking plate; the stripper plate is moved to push the molded product into the middle of the first clamping plate and the second clamping plate of the blanking plate for clamping, the rotating assembly and the movement will cooperate to drive the blanking plate to move, thereby unloading the cosmetic bottles, and the cosmetic bottles are stably and neatly placed on the upper side of the conveyor belt, which is convenient for subsequent use and improves the production efficiency of cosmetics.

Description

Technical Field

[0001] The invention belongs to the technical field of packaging bottle production, and in particular relates to an injection molding device for a PET cosmetic bottle. Background Art

[0002] Fast-moving consumer goods such as cosmetics are usually packaged in packaging bottles when they are sold. The packaging bottles are not only containers for cosmetics, but also play a role in improving the aesthetics of cosmetics. Existing cosmetic packaging bottles are generally plastic packaging bottles. Due to their low cost, plastic packaging bottles are widely used.

[0003] At present, PET cosmetic bottles are produced by injection molding machines. The injection molding machines include a raw material bucket, a propulsion device, an injection head and a mold forming device. When in use, the plastic raw material first needs to be heated and melted by the propulsion device, and then injected into the mold forming device through the injection head, and then cooled and formed. After the cosmetic bottles are injection-molded, most of the current injection molding equipment uses direct demolding to unload the products by dropping them, which requires subsequent equipment or workers to organize and place the products, which adds additional production costs and labor, and reduces the production efficiency of the products. Therefore, a PET cosmetic bottle injection molding device is needed to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to provide an injection molding device for PET cosmetic bottles. When the stripping plate is driven to move by an electric telescopic rod, the molded product is pushed into the circular hole of the blanking plate and clamped by a first clamping plate and a second clamping plate. The rotating component and the movement will cooperate to drive the blanking plate to move, thereby unloading the cosmetic bottles and placing the cosmetic bottles stably and neatly on the upper side of the conveyor belt to facilitate subsequent use and improve the production efficiency of cosmetics.

[0005] In order to achieve the above technical objectives, the technical solution adopted by the present invention is as follows:

[0006] A PET cosmetic bottle injection molding device, comprising an injection molding machine body and a conveyor belt, the injection molding machine body comprising a movable mold, a fixed mold and a stripper plate, the conveyor belt being installed at the front side of the injection molding machine body, a hydraulic cylinder matching the movable mold being installed inside the injection molding machine body, an electric telescopic rod matching the stripper plate being fixedly arranged on the upper side of the movable mold, a moving platform being slidably mounted inside the injection molding machine body, a support column being installed on the upper side of the moving platform, a round rod being installed on the upper side of the support column, a blanking plate matching the stripper plate being fixedly arranged on the side of the round rod away from the support column, and the blanking plate being provided with a plurality of A circular hole, a first clamping plate is slidably mounted on one side of the blanking plate, a second clamping plate matching the first clamping plate is slidably mounted on one side of the blanking plate, a plurality of first springs are fixedly mounted between the side wall on the opposite side of the first clamping plate and the second clamping plate and the side wall of the blanking plate, an inclined block is fixedly mounted on the upper side of the first clamping plate and the second clamping plate, a first conical column matching the two inclined blocks is fixedly mounted on the side wall of the stripping plate, a second conical column matching the two inclined blocks is fixedly mounted on the upper side of the conveyor belt, a rotating assembly matching the blanking plate is arranged inside the injection molding machine body, and a moving part matching the moving platform is arranged inside the injection molding machine body;

[0007] The moving part includes a first screw rotatably mounted inside the injection molding machine body, the moving platform is provided with a threaded hole matching the first screw, a motor is installed inside the injection molding machine body, and a transmission part is provided between the output shaft of the motor and the first screw.

[0008] The rotating assembly includes a gear ring fixed concentrically on the lower side of the support column, a gear plate matching the gear ring fixedly provided inside the injection molding machine body, a first bevel gear fixed concentrically on the round rod, a vertical shaft rotatably mounted inside the support column, a second bevel gear matching the first bevel gear fixed concentrically on the upper side of the vertical shaft, a first gear fixed concentrically on the lower side of the vertical shaft, and a plurality of vertical teeth matching the first gear fixedly provided inside the injection molding machine body.

[0009] A lifting assembly matching the support column is provided on the front side of the injection molding machine body, and the lifting assembly includes a lifting platform slidably assembled on the front side of the injection molding machine body. Two X-shaped telescopic frames matching the lifting platform are rotatably assembled on the front side of the injection molding machine body, and two connecting rods are fixedly arranged on the lower sides of the two X-shaped telescopic frames. A bidirectional screw matching the two connecting rods is rotatably assembled inside the injection molding machine body, and a long rod is concentrically fixed on the rear side of the bidirectional screw.

[0010] The transmission member includes a circular shaft fixedly provided concentrically with the output shaft of the motor, two elliptical plates are slidably installed inside the injection molding machine body, a first pulley matching the first screw is rotatably installed between the two elliptical plates, a second pulley matching the circular shaft is rotatably installed between the two elliptical plates, a belt is installed between the first pulley and the second pulley, a plurality of first blocks are fixedly provided on the side wall of the circular shaft and the side wall of the long rod, a plurality of second blocks are fixedly provided on the side wall of the first screw, a second screw matching the two elliptical plates is rotatably installed inside the injection molding machine body, a second gear is fixedly provided concentrically on the rear side of the second screw, and a rack matching the second gear is fixedly provided on the lower side of the movable mold.

[0011] A limit piece matching the gear ring and the first gear is provided inside the injection molding machine body, and the limit piece includes a vertical plate slidably mounted inside the injection molding machine body, a first clamping plate matching the first gear is fixedly provided on the front side of the vertical plate, a first limit plate matching the gear ring is fixedly provided on the upper side of the vertical plate, and a plurality of linearly distributed second springs are fixedly provided between the rear side of the vertical plate and the injection molding machine body.

[0012] A locking member matching the gear ring and the first gear is provided on the lower side of the lifting platform, and the locking member includes a long plate slidably mounted on the lower side of the lifting platform, a second clamping plate matching the first gear is fixedly provided on the lower side of the long plate, a second limiting plate matching the gear ring is fixedly provided on the upper side of the long plate, a plurality of symmetrically distributed guide rods are fixedly provided on the side wall of the long plate, and a plurality of third springs matching the guide rods are fixedly provided between the side wall of the long plate and the side wall of the lifting platform.

[0013] The front side of the injection molding machine body is slidably equipped with two box doors, and the side wall of the support column is rotatably equipped with two symmetrically distributed vertical rods, and the vertical rods and the box doors on the same side are hinged with pull rods.

[0014] When the stripping plate is driven to move by the electric telescopic rod, the formed product is pushed into the circular hole of the blanking plate, and is clamped by the first clamping plate and the second clamping plate. The rotating component and the movement will cooperate to drive the blanking plate to move, thereby unloading the cosmetic bottles, and the cosmetic bottles are stably and neatly placed on the upper side of the conveyor belt, which is convenient for subsequent use and improves the production efficiency of cosmetics. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention is further illustrated by means of the non-limiting examples given in the accompanying drawings.

[0016] Figure 1 It is a structural schematic diagram of an embodiment of an injection molding device for a PET cosmetic bottle of the present invention;

[0017] Figure 2 The cross-sectional structure of an embodiment of an injection molding device for a PET cosmetic bottle of the present invention is shown in FIG. Figure 1 ;

[0018] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0019] Figure 4 for Figure 2 A schematic diagram of the enlarged structure at B in the middle;

[0020] Figure 5 The cross-sectional structure of an embodiment of an injection molding device for a PET cosmetic bottle of the present invention is shown in FIG. Figure 2 ;

[0021] Figure 6 for Figure 5 Schematic diagram of the enlarged structure at C in the middle;

[0022] Figure 7 for Figure 5 Schematic diagram of the enlarged structure at D in the middle;

[0023] Figure 8 The cross-sectional structure of an embodiment of an injection molding device for a PET cosmetic bottle of the present invention is shown in FIG. Figure 3 ;

[0024] Fig. 9 for Figure 8 Schematic diagram of the enlarged structure at E in the middle;

[0025] Fig.10 for Figure 8 Schematic diagram of the enlarged structure at F in the middle.

[0026] The main component symbols are described as follows:

[0027] Injection molding machine body 1, conveyor belt 10, movable mold 11, fixed mold 12, stripper plate 13, hydraulic cylinder 14, electric telescopic rod 15, mobile table 16, support column 17, round rod 18, blanking plate 19, first clamping plate 20, second clamping plate 21, first spring 22, inclined block 23, first cone column 24, second cone column 25, first screw 26, motor 27, gear ring 30, gear plate 31, first bevel gear 32, vertical shaft 33, second bevel gear 34, first gear 35, vertical gear 36 , lifting platform 40, X-shaped telescopic frame 41, connecting rod 42, bidirectional screw 43, long rod 44, circular shaft 50, elliptical plate 51, belt 52, first clamping block 53, second clamping block 54, second screw 55, second gear 56, rack 57, vertical plate 65, first clamping plate 66, first limit plate 67, second spring 68, long plate 70, second clamping plate 71, second limit plate 72, guide rod 73, third spring 74, box door 80, vertical rod 81, pull rod 82. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0029] like Figure 1-10 As shown, an injection molding device for a PET cosmetic bottle of the present invention comprises an injection molding machine body 1 and a conveyor belt 10, the injection molding machine body 1 comprises a movable mold 11, a fixed mold 12 and a stripper plate 13, the conveyor belt 10 is installed at the front side of the injection molding machine body 1, a hydraulic cylinder 14 matching the movable mold 11 is installed inside the injection molding machine body 1, an electric telescopic rod 15 matching the stripper plate 13 is fixedly arranged on the upper side of the movable mold 11, a moving platform 16 is slidably mounted inside the injection molding machine body 1, a support column 17 is installed on the upper side of the moving platform 16, a round rod 18 is installed on the upper side of the support column 17, a blanking plate 19 matching the stripper plate 13 is fixedly arranged on the side of the round rod 18 away from the support column 17, and the blanking plate 19 is provided with a plurality of fixed rods 19 matching the fixed rods 17. A circular hole matching the mold 12, a first clamping plate 20 is slidably mounted on one side of the blanking plate 19, a second clamping plate 21 matching the first clamping plate 20 is slidably mounted on one side of the blanking plate 19, a plurality of first springs 22 are fixedly mounted between the side wall on the opposite side of the first clamping plate 20 and the second clamping plate 21 and the side wall of the blanking plate 19, an inclined block 23 is fixedly mounted on the upper side of the first clamping plate 20 and the second clamping plate 21, a first cone column 24 matching the two inclined blocks 23 is fixedly mounted on the side wall of the stripping plate 13, a second cone column 25 matching the two inclined blocks 23 is fixedly mounted on the upper side of the conveyor belt 10, a rotating assembly matching the blanking plate 19 is arranged inside the injection molding machine body 1, and a moving part matching the moving table 16 is arranged inside the injection molding machine body 1;

[0030] The moving part includes a first screw 26 rotatably mounted inside the injection molding machine body 1, the moving platform 16 is provided with a threaded hole matching the first screw 26, a motor 27 is installed inside the injection molding machine body 1, and a transmission part is provided between the output shaft of the motor 27 and the first screw 26;

[0031] When the present invention is used, the hydraulic cylinder 14 and the electric telescopic rod 15 drive the movable mold 11 and the stripper plate 13 to move synchronously, so that the movable mold 11 and the stripper plate 13 are fitted with the fixed mold 12, so as to perform injection molding. After the injection molding is completed, the hydraulic cylinder 14 and the electric telescopic rod 15 drive the movable mold 11 and the stripper plate 13 to separate from the fixed mold 12, and at the same time, the motor 27 drives the first screw 26 to move through the transmission member, and the first screw 26 drives the moving platform 16 to move, and the moving platform 16 drives the support column 17 to move, and the support column 17 drives the blanking plate 19 to move, so that the blanking plate 19 is flush with the stripper plate 13, and the output end of the electric telescopic rod 15 pushes the stripper plate 13 to move, and at the same time The first cone column 24 moves the two inclined blocks 23 to both sides, and the two inclined blocks 23 drive the first clamping plate 20 and the second clamping plate 21 to move synchronously, and at the same time push the cosmetic bottles on the side of the movable mold 11 into the round hole of the blanking plate 19, and the electric telescopic rod 15 drives the stripping plate 13 to fit the movable mold 11 again, and under the elastic action of the first springs 22 on both sides, the first clamping plate 20 and the second clamping plate 21 clamp the cosmetic bottles in the blanking plate 19, and then the first screw 26 is driven by the motor 27 to rotate, and cooperate with the rotating assembly, so that the cosmetic bottles clamped by the blanking plate 19 are neatly placed on the upper side of the conveyor belt 10, which is convenient for the use of subsequent processes and reduces the production and processing equipment of cosmetics;

[0032] When the stripping plate is driven to move by the electric telescopic rod, the formed product is pushed into the circular hole of the blanking plate, and is clamped by the first clamping plate and the second clamping plate. The rotating component and the movement will cooperate to drive the blanking plate to move, thereby unloading the cosmetic bottles, and the cosmetic bottles are stably and neatly placed on the upper side of the conveyor belt, which is convenient for subsequent use and improves the production efficiency of cosmetics.

[0033] The rotating assembly includes a gear ring 30 fixedly disposed concentrically on the lower side of the support column 17, a gear plate 31 matching the gear ring 20 fixedly disposed inside the injection molding machine body 1, a first bevel gear 32 fixedly disposed concentrically on the round rod 18, a vertical shaft 33 rotatably mounted inside the support column 17, a second bevel gear 34 matching the first bevel gear 32 fixedly disposed concentrically on the upper side of the vertical shaft 33, a first gear 35 fixedly disposed concentrically on the lower side of the vertical shaft 33, and a plurality of vertical teeth 36 matching the first gear 35 fixedly disposed inside the injection molding machine body 1;

[0034] When the present invention is used, when the movable platform 16 drives the support column 17 to move to a certain distance, the lower side gear ring 30 of the support column 17 engages with the gear plate 31, thereby driving the support column 17 to rotate, and the support column 17 thereby drives the blanking plate 19 to rotate, and the movable platform 16 drives the support column 17 to continue to move, the first gear 35 engages with the vertical gear 36, the first gear 35 drives the vertical shaft 33 to rotate, the vertical shaft 33 drives the second bevel gear 34 to rotate, and the second bevel gear 34 drives the round rod 18 to rotate through the first bevel gear 32, thereby adjusting the blanking plate 19 to be flush with the conveyor belt 10, and adjusting the opening direction of the cosmetic bottle at the same time, and then placing it on the upper side of the conveyor belt 10, it is convenient for subsequent processing, thereby improving the convenience of use of the device.

[0035] A lifting assembly matching the support column 17 is provided at the front side of the injection molding machine body 1, and the lifting assembly includes a lifting platform 40 slidably assembled at the front side of the injection molding machine body 1, and two X-shaped telescopic frames 41 matching the lifting platform 40 are rotatably assembled at the front side of the injection molding machine body 1, and two connecting rods 42 are fixedly arranged at the lower sides of the two X-shaped telescopic frames 41, and a bidirectional screw 43 matching the two connecting rods 42 is rotatably assembled inside the injection molding machine body 1, and a long rod 44 is concentrically fixedly arranged at the rear side of the bidirectional screw 43;

[0036] The transmission member includes a circular shaft 50 fixedly provided concentrically with the output shaft of the motor 27, two elliptical plates 51 are slidably installed inside the injection molding machine body 1, a first pulley matching the first screw 26 is rotatably installed between the two elliptical plates 51, a second pulley matching the circular shaft 50 is rotatably installed between the two elliptical plates 51, a belt 52 is installed between the first pulley and the second pulley, a plurality of first clamping blocks 53 are fixedly provided on the side wall of the circular shaft 50 and the side wall of the long rod 44, a plurality of second clamping blocks 54 are fixedly provided on the side wall of the first screw 26, a second screw 55 matching the two elliptical plates 51 is rotatably installed inside the injection molding machine body 1, a second gear 56 is fixedly provided concentrically on the rear side of the second screw 55, and a rack 57 matching the second gear 56 is fixedly provided on the lower side of the movable mold 13;

[0037] During the use of the present invention, when the hydraulic cylinder 14 drives the movable mold 11 to separate from the fixed mold 12, the movable mold 11 synchronously drives the second gear 56 to rotate through the rack 57, the second gear 56 drives the second screw 55 to rotate, the second screw 55 drives the two elliptical plates 51 to move, the elliptical plate 51 drives the first pulley and the second pulley to move, so that the first pulley slides to the side wall of the circular shaft 50, so that when the motor 27 is running, the first screw 26 is driven to rotate through the circular shaft 50, the first pulley, the second pulley and the belt 52, and the first screw 26 drives the moving platform 16 to move, and the structure is simple and reasonable;

[0038] During the use of the present invention, when the first screw 26 drives the movable platform 16 to slide to the upper side of the lifting platform 40, the hydraulic cylinder 14 drives the movable mold 11 and the fixed mold 12 to fit together, and the second gear 56 is driven to rotate through the rack 57, and the second gear 56 thereby drives the second screw 55 to rotate, and the elliptical plate 51 drives the first pulley, the second pulley and the belt 52 to move, so that the first pulley is connected to the long rod 44 and the round shaft 50, and the second pulley is separated from the second block 54, so that the motor 27 drives the bidirectional screw 43 to rotate The bidirectional screw 43 drives the two X-shaped telescopic frames 41 to rotate, so that the lifting platform 40 descends, the lifting platform 40 drives the supporting column 17 to descend, and the supporting column 17 synchronously drives the blanking plate 19 to descend, so that the two inclined blocks 23 on the side wall of the blanking plate 19 drive the first clamping plate 20 and the second clamping plate 21 to move away from each other under the push of the second conical column 25, so that the cosmetic bottle is placed on the upper side of the conveyor belt 10, and the motor 27 drives the bidirectional screw 43 to rotate to make the lifting platform 40 rise, so as to realize automatic demoulding, blanking and discharging, and reduce production costs.

[0039] A stopper matching the gear ring 30 and the first gear 35 is provided inside the injection molding machine body 1, and the stopper includes a vertical plate 65 slidably mounted inside the injection molding machine body 1, a first clamping plate 66 matching the first gear 35 is fixedly provided on the front side of the vertical plate 65, a first stopper plate 67 matching the gear ring 30 is fixedly provided on the upper side of the vertical plate 65, and a plurality of linearly distributed second springs 68 are fixedly provided between the rear side of the vertical plate 65 and the injection molding machine body 1;

[0040] A locking member matching the gear ring 30 and the first gear 35 is provided on the lower side of the lifting platform 40, and the locking member includes a long plate 70 slidably mounted on the lower side of the lifting platform, a second clamping plate 71 matching the first gear 35 is fixedly provided on the lower side of the long plate 70, a second limit plate 72 matching the gear ring 30 is fixedly provided on the upper side of the long plate 70, a plurality of symmetrically distributed guide rods 73 are fixedly provided on the side wall of the long plate 70, and a plurality of third springs 74 matching the guide rods 73 are fixedly provided between the side wall of the long plate 70 and the side wall of the lifting platform 40;

[0041] When the present invention is used, when the moving platform 16 is close to the movable mold 11, the first clamping plate 66 and the first limiting plate 67 lock and limit the gear ring 30 and the first gear 35 under the elastic action of the second spring 68, so as to prevent the blanking plate 19 and the support column 17 from rotating, and ensure that the blanking plate 19 is always flush with the stripping plate 13, so as to ensure the smooth use of the device;

[0042] During the use of the present invention, when the movable platform 16 moves, under the elastic action of the second spring 68, the vertical plate 65 drives the first clamping plate 66 and the first limiting plate 67 to move synchronously, and the ring gear 30 and the first gear 35 are always locked. After moving to a certain position, the first clamping plate 66 and the first limiting plate 67 are disengaged from the ring gear 30 and the first gear 35, and the ring gear 30 and the first gear 35 are thereby driven by the tooth plate 31 and the vertical teeth 36 to rotate. After disengaging from the tooth plate 36, the second clamping plate 71 and the second limiting plate 72 limit and lock the ring gear 30 and the first gear 35. As the movable platform 16 moves, the third spring 74 is compressed. During the whole process, the ring gear 30 and the first gear 35 are always limited to ensure the smooth use of the device.

[0043] Two doors 80 are slidably mounted on the front side of the injection molding machine body 1, and two symmetrically distributed vertical rods 81 are rotatably mounted on the side wall of the support column 17, and a pull rod 82 is hingedly connected between the vertical rod 81 and the door 80 on the same side;

[0044] When the present invention is used, the movable platform 16 drives the support column 17 to move, and the box door 80 is opened and closed by the pull rod 82 to prevent the interior of the injection molding machine body 1 from being in contact with the outside world for a long time, thereby ensuring the cleanliness of the interior of the injection molding machine body 1 and the quality of the product.

[0045] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. An injection molding device for a PET cosmetic bottle, comprising an injection molding machine body and a conveyor belt, wherein the injection molding machine body comprises a movable mold, a fixed mold and a stripper mold, and is characterized in that: The conveyor belt is installed on the front side of the injection molding machine body, a hydraulic cylinder matching the movable mold is installed inside the injection molding machine body, an electric telescopic rod matching the stripping plate is fixedly arranged on the upper side of the movable mold, a moving platform is slidably installed inside the injection molding machine body, a support column is installed on the upper side of the moving platform, a round rod is installed on the upper side of the support column, a blanking plate matching the stripping plate is fixedly arranged on the side of the round rod away from the support column, the blanking plate is provided with a plurality of round holes matching the fixed mold, a first clamping plate is slidably installed on one side of the blanking plate, and the blanking plate A second clamping plate matching the first clamping plate is slidably mounted on one side, a plurality of first springs are fixedly mounted between the side wall on the opposite side of the first clamping plate and the second clamping plate and the side wall of the blanking plate, an inclined block is fixedly mounted on the upper side of the first clamping plate and the second clamping plate, a first conical column matching the two inclined blocks is fixedly mounted on the side wall of the stripping plate, a second conical column matching the two inclined blocks is fixedly mounted on the upper side of the conveyor belt, a rotating assembly matching the blanking plate is arranged inside the injection molding machine body, and a moving part matching the moving platform is arranged inside the injection molding machine body; The moving part includes a first screw rotatably mounted inside the injection molding machine body, the moving platform is provided with a threaded hole matching the first screw, a motor is installed inside the injection molding machine body, and a transmission part is provided between the output shaft of the motor and the first screw.

2. The injection molding device for a PET cosmetic bottle according to claim 1, characterized in that: The rotating assembly includes a gear ring fixed concentrically on the lower side of the support column, a gear plate matching the gear ring fixedly provided inside the injection molding machine body, a first bevel gear fixed concentrically on the round rod, a vertical shaft rotatably mounted inside the support column, a second bevel gear matching the first bevel gear fixed concentrically on the upper side of the vertical shaft, a first gear fixed concentrically on the lower side of the vertical shaft, and a plurality of vertical teeth matching the first gear fixedly provided inside the injection molding machine body.

3. The injection molding device for a PET cosmetic bottle according to claim 2, characterized in that: A lifting assembly matching the support column is provided on the front side of the injection molding machine body, and the lifting assembly includes a lifting platform slidably assembled on the front side of the injection molding machine body. Two X-shaped telescopic frames matching the lifting platform are rotatably assembled on the front side of the injection molding machine body, and two connecting rods are fixedly arranged on the lower sides of the two X-shaped telescopic frames. A bidirectional screw matching the two connecting rods is rotatably assembled inside the injection molding machine body, and a long rod is concentrically fixed on the rear side of the bidirectional screw.

4. The injection molding device for a PET cosmetic bottle according to claim 3, characterized in that: The transmission member includes a circular shaft fixedly provided concentrically with the output shaft of the motor, two elliptical plates are slidably installed inside the injection molding machine body, a first pulley matching the first screw is rotatably installed between the two elliptical plates, a second pulley matching the circular shaft is rotatably installed between the two elliptical plates, a belt is installed between the first pulley and the second pulley, a plurality of first blocks are fixedly provided on the side wall of the circular shaft and the side wall of the long rod, a plurality of second blocks are fixedly provided on the side wall of the first screw, a second screw matching the two elliptical plates is rotatably installed inside the injection molding machine body, a second gear is fixedly provided concentrically on the rear side of the second screw, and a rack matching the second gear is fixedly provided on the lower side of the movable mold.

5. The injection molding device for a PET cosmetic bottle according to claim 4, characterized in that: A limit piece matching the gear ring and the first gear is provided inside the injection molding machine body, and the limit piece includes a vertical plate slidably mounted inside the injection molding machine body, a first clamping plate matching the first gear is fixedly provided on the front side of the vertical plate, a first limit plate matching the gear ring is fixedly provided on the upper side of the vertical plate, and a plurality of linearly distributed second springs are fixedly provided between the rear side of the vertical plate and the injection molding machine body.

6. The injection molding device for a PET cosmetic bottle according to claim 5, characterized in that: A locking member matching the gear ring and the first gear is provided on the lower side of the lifting platform, and the locking member includes a long plate slidably mounted on the lower side of the lifting platform, a second clamping plate matching the first gear is fixedly provided on the lower side of the long plate, a second limiting plate matching the gear ring is fixedly provided on the upper side of the long plate, a plurality of symmetrically distributed guide rods are fixedly provided on the side wall of the long plate, and a plurality of third springs matching the guide rods are fixedly provided between the side wall of the long plate and the side wall of the lifting platform.

7. The injection molding device for a PET cosmetic bottle according to claim 6, characterized in that: The front side of the injection molding machine body is slidably equipped with two box doors, and the side wall of the support column is rotatably equipped with two symmetrically distributed vertical rods, and the vertical rods and the box doors on the same side are hinged with pull rods.

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