A plastic bottle embryo injection molding device convenient to disassemble and clean

Abstract

The application belongs to a plastic bottle embryo body injection molding device convenient to disassemble and clean, specifically, each hollow frame outer side two end surface is slidably installed with a sliding plate, each hollow frame inside is rotatably provided with an adjusting mechanism, and the adjusting mechanism and the sliding plate are drivingly connected, a limiting mechanism is slidably installed at the bottom of the processing table, a pushing mechanism is arranged between the limiting mechanism and the sliding plate, a mounting frame is transversely and fixedly installed between the bottom of the hollow frame outer side, a synchronous mechanism is arranged in the mounting frame, and the synchronous mechanism and the adjusting mechanism are drivingly connected. The multiple sets of limiting insertion rods located below the mold body can be synchronously horizontally moved into or out of the insertion column, and then the mold body can be quickly installed and disassembled under the clamping and limiting action of the limiting insertion rods on the insertion column, the operation steps and labor consumption required by the operator for disassembling the mold body are reduced, and the subsequent cleaning and maintenance efficiency of the mold body inside is improved.

Description

Technical Field

[0001] This invention relates to the field of plastic preform production technology, specifically to a plastic preform injection molding device that is easy to disassemble and clean. Background Technology

[0002] Due to their excellent physical properties and chemical stability, PET bottles are widely used in the packaging of products such as carbonated beverages, wines, juices, mineral water, edible oils, condiments, pharmaceuticals, cosmetics, pesticides, and detergents. In the production of plastic bottles, the technology uses an injection molding machine to inject pre-dried and molten PET material into a specially designed mold cavity under high pressure. After cooling and solidification, a plastic bottle preform with a certain shape and size is obtained. Subsequently, the preform is blow-molded into a plastic bottle body through a subsequent blow molding process.

[0003] Currently, in the injection molding production of plastic bottle preforms, hot melt plastic is injected into the corresponding injection mold for preform shaping. When installing and using the injection mold, bolts are often used for connection and assembly. However, for a large number of molds, this method requires numerous manual steps for assembly and disassembly, necessitating operators to tighten multiple sets of bolts sequentially. This is time-consuming, labor-intensive, and also affects the efficiency of subsequent mold cleaning. Therefore, a new technical solution is needed. Summary of the Invention

[0004] The purpose of this invention is to provide a plastic preform injection molding device that is easy to disassemble and clean, thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a plastic bottle preform injection molding device that is easy to disassemble and clean, including a processing table, wherein support legs are vertically fixedly installed on the four corner surfaces of the bottom of the processing table, and a mold body is detachably installed on the top of the processing table, and the number of mold bodies is several sets, each mold body including a left mold body and a right mold body, and a hollow frame is vertically fixedly installed on the bottom of the processing table;

[0006] Each hollow frame has a sliding plate slidably mounted on both outer end surfaces, and each hollow frame has an adjustment mechanism rotatably mounted inside, and the adjustment mechanism and the sliding plate are connected in a transmission manner. A limit mechanism is slidably mounted on the bottom of the processing table, and a pushing mechanism is provided between the limit mechanism and the sliding plate.

[0007] An installation frame is horizontally fixed between the bottom outer sides of the hollow frame. A synchronization mechanism is provided inside the installation frame, and the synchronization mechanism and the adjustment mechanism are connected in a transmission manner.

[0008] By adopting the above technical solution, through the synchronous driving action of the synchronous mechanism on multiple sets of adjustment mechanisms, and through the transmission conversion action of the pushing mechanism, adjustment mechanism and limiting mechanism, multiple sets of limiting rods located below the mold body can move horizontally into or out of the insertion column at the same time. In combination with the locking and limiting action of the limiting rods on the insertion column, the mold body can be quickly installed and disassembled, reducing the number of operation steps and labor consumption required for the operator to install and disassemble the mold body, thereby improving the efficiency of subsequent cleaning and maintenance of the mold body.

[0009] As an optional solution to the technical solution of this application, the adjustment mechanism includes a rotating screw. Each hollow frame has a rotating screw installed vertically via a bearing. Each rotating screw has a lifting sleeve threadedly connected to its outer surface. Each lifting sleeve has a connecting block on its outer side, and the side of the connecting block is fixedly connected to the outer side of the sliding plate. Each hollow frame has a limiting groove vertically formed at both ends of its side, and the connecting block is slidably inserted into the limiting groove.

[0010] By adopting the above technical solution, the rotational transmission of the lifting sleeve through the rotating screw can provide the power required for the sliding plate and the push rod to push the transmission plate horizontally.

[0011] As an optional solution to the technical solution of this application, the limiting mechanism includes limiting rods and insertion columns. Insertion columns are vertically fixedly installed at the bottom of the left and right mold bodies in each mold body. Insertion slots are vertically opened inside the processing table, and the insertion columns are slidably inserted into the insertion slots. Limiting slots are horizontally opened inside each insertion column. Transmission plates are slidably installed at the bottom of the processing table, and the number of transmission plates is the same as the number of mold bodies. Limiting rods are fixedly installed on both sides of the top of each transmission plate, and the limiting rods and limiting slots are at the same horizontal position.

[0012] By adopting the above technical solution, by setting a plug-in post at the bottom of the mold body and setting a limiting rod horizontally inside the processing table, after the limiting rod is pushed into the limiting slot inside the plug-in post, the plug-in post is prevented from arbitrarily moving vertically out of the limiting rod, and the mold body can be snapped and fixed.

[0013] As an optional solution to the technical solution of this application, the bottom of the processing table is provided with a movable groove, the limiting rod is slidably installed inside the movable groove, and the movable groove and the insertion groove are connected. Guide rods are fixedly installed on both ends of the side surface of the limiting rod, and the guide rods are slidably inserted into the processing table.

[0014] By adopting the above technical solution, the transmission plate and the limiting rod can be pushed so that the transmission plate and the limiting rod will not move arbitrarily to the side, but can only move horizontally, thereby ensuring the stability of the clamping and reinforcement of the mold body.

[0015] As an optional solution to the technical solution of this application, the pushing mechanism includes a pushing rod, and each of the sliding plates is inclinedly hinged to a pushing rod on its side via a rotating shaft, and the side of the pushing rod away from the sliding plate is hinged to the bottom of the transmission plate via a rotating shaft.

[0016] By adopting the above technical solution, the vertical movement force of the sliding plate can be converted into a horizontal pushing force on the transmission plate and the limiting rod through the transmission conversion action of the push rod.

[0017] As an optional solution to the technical solution of this application, the synchronization mechanism includes a transmission sprocket and a transmission chain. A rotating rod is vertically rotatably mounted inside the mounting frame via a bearing, and the top of the rotating rod is fixedly connected to the bottom of the rotating screw. A servo motor is fixedly mounted on the bottom side of the mounting frame, and the top of the servo motor transmission shaft is fixedly connected to the bottom of the rotating rod via a coupling. A transmission sprocket is fixedly sleeved on the outer surface of the middle end of each rotating rod, and a transmission chain ring is meshed on the outer side of the transmission sprocket, and the transmission chain ring is rotatably mounted inside the mounting frame.

[0018] By adopting the above technical solution, the servo motor can drive multiple sets of rotating rods and rotating lead screws to rotate synchronously and in the same direction through the meshing transmission action of the transmission chain ring and transmission sprocket.

[0019] As an optional solution to the technical solution of this application, a support frame is fixedly installed on the top middle surface of the processing table. Electric push rods are vertically fixedly installed on both sides of the top of the support frame, and a lifting frame is fixedly installed at the bottom of the electric push rod drive shaft. The lifting frame is slidably installed on the support frame. A discharge pipe is vertically fixedly installed through the side of the lifting frame, and there are several sets of discharge pipes. A corrugated pipe is fixedly connected to the top of each discharge pipe, and a feed pipe is fixedly connected to the top of each corrugated pipe.

[0020] By adopting the above technical solution, through the structural action of the electric actuator and by connecting the feed pipe and discharge pipe with the corrugated pipe, the vertical position of the discharge port of the discharge pipe can be adjusted to ensure that the discharge pipe can stably and leak-free discharge the hot melt plastic into the mold body for injection molding and shaping.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] This invention utilizes vertically positioned limit posts at the bottom of the mold body and horizontally sliding limit rods inside the processing table. These limit rods are connected via a transmission plate. A rotating lead screw is rotatably mounted inside the hollow frame. The rotation of the lead screw, which drives the lifting sleeve, causes the lifting sleeve, which is fitted onto its surface, to move vertically in sync. A pivot shaft then hinges the two ends of a push rod to the outer sides of the sliding plate and the transmission plate, respectively. This allows the push rod to move the lifting sleeve... The vertical movement force of the cylinder is converted into the horizontal movement force of the transmission plate. This allows the transmission plate to move horizontally at the bottom of the processing table, while simultaneously driving the limiting rods to move horizontally within the movable slot. This enables multiple sets of limiting rods located below the mold body to move horizontally into or out of the insertion pins. Combined with the locking and limiting effect of the limiting rods on the insertion pins, the mold body can be quickly installed and disassembled, reducing the number of steps and labor required for the operator to assemble and disassemble the mold body, thereby improving the efficiency of subsequent cleaning and maintenance of the mold body.

[0023] This invention features a mounting frame at the bottom of a hollow frame in the same horizontal direction. A rotating rod, fixedly connected to a rotating lead screw, is rotatably mounted inside the mounting frame. This allows a single-position servo motor to rotate, driving the rotating rod and its surface-mounted transmission sprocket. Combined with the meshing transmission of the transmission chain on the sprocket, this drives multiple sets of rotating rods and lead screws to rotate synchronously and in the same direction. This provides corresponding horizontal movement force to multiple transmission plates, enabling synchronous assembly and disassembly of multiple mold bodies, further improving the efficiency of mold assembly, disassembly, and subsequent cleaning for workers. Attached Figure Description

[0024] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0025] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a plastic bottle preform injection molding device that is easy to disassemble and clean according to the present invention.

[0026] Figure 2 This is a bottom view of the processing table bottom structure of a plastic bottle preform injection molding device that is easy to disassemble and clean according to the present invention.

[0027] Figure 3 This is a front view cross-sectional structural diagram of the processing table of a plastic bottle preform injection molding device that is easy to disassemble and clean according to the present invention.

[0028] Figure 4 This is a front view of the top surface of the processing table of a plastic preform injection molding device that is easy to disassemble and clean according to the present invention.

[0029] In the diagram: 1. Processing table; 11. Support leg; 12. Support frame; 13. Electric actuator; 14. Lifting frame; 15. Corrugated pipe; 16. Feed pipe; 17. Discharge pipe; 18. Mold body; 2. Insertion column; 21. Transmission plate; 22. Limiting rod; 23. Hollow frame; 24. Rotating screw; 25. Lifting sleeve; 26. Connecting block; 27. Sliding plate; 28. Push rod; 29. ​​Limiting groove; 3. Mounting frame; 31. Rotating rod; 32. Transmission sprocket; 33. Transmission chain; 34. Servo motor; 4. Movable groove; 41. Insertion groove; 42. Limiting slot; 5. Guide rod. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0031] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0032] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The model numbers of the electrical appliances provided in this invention are for reference only, and different models of electrical appliances with the same function can be replaced according to actual usage.

[0033] Please see Figure 1-4This invention provides a technical solution: a plastic bottle preform injection molding device that is easy to disassemble and clean. Support legs 11 are vertically fixedly installed on the four corner surfaces of the bottom of the processing table 1. A mold body 18 is detachably installed on the top of the processing table 1, and the number of mold bodies 18 is several sets. Each mold body 18 includes a left mold body and a right mold body. A hollow frame 23 is vertically fixedly installed on the bottom of the processing table 1. A support frame 12 is fixedly installed on the middle surface of the top of the processing table 1. Electric push rods 13 are vertically fixedly installed on both sides of the top of the support frame 12. A lifting frame 14 is fixedly installed at the bottom of the drive shaft of the electric push rod 13, and the lifting frame 14 is slidably installed on the support frame 12. A discharge pipe 17 is vertically fixedly installed through the side of the lifting frame 14, and the number of discharge pipes 17 is several sets. A corrugated pipe 15 is fixedly connected to the top of each discharge pipe 17, and a feed pipe 16 is fixedly connected to the top of each corrugated pipe 15.

[0034] In this technical solution (through Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown), a mounting frame 3 is horizontally fixed between the bottom outer sides of the hollow frame 23. A synchronization mechanism is provided inside the mounting frame 3, and the synchronization mechanism and the adjustment mechanism are connected in transmission. The synchronization mechanism includes a transmission sprocket 32 ​​and a transmission chain 33. A rotating rod 31 is vertically rotatably mounted inside the mounting frame 3 via a bearing, and the top of the rotating rod 31 is fixedly connected to the bottom of the rotating screw 24. A servo motor 34 is fixedly mounted on the bottom side of the mounting frame 3, and the top of the transmission shaft of the servo motor 34 is fixedly connected to the bottom of the rotating rod 31 via a coupling. A transmission sprocket 32 ​​is fixedly sleeved on the outer surface of the middle end of each rotating rod 31. A transmission chain ring is meshed on the outer side of the transmission sprocket 32, and the transmission chain ring is rotatably mounted inside the mounting frame 3.

[0035] In this technical solution (through Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, each hollow frame 23 has a sliding plate 27 slidably installed on both outer end surfaces. Each hollow frame 23 has an adjustment mechanism rotatably installed inside, and the adjustment mechanism is connected to the sliding plate 27 in a transmission manner. The adjustment mechanism includes a rotating screw 24. Each hollow frame 23 has a rotating screw 24 vertically rotatably installed inside via a bearing. Each rotating screw 24 has a lifting sleeve 25 movably sleeved on its outer surface via a thread. Each lifting sleeve 25 has a connecting block 26 on its outer side, and the side of the connecting block 26 is fixedly connected to the outer side of the sliding plate 27. Each hollow frame 23 has a limiting groove 29 vertically opened at both ends of its side, and the connecting block 26 is slidably inserted into the limiting groove 29.

[0036] In this technical solution (through Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown), a limiting mechanism is slidably installed at the bottom of the processing table 1. The limiting mechanism includes a limiting rod 22 and a plug-in post 2. The bottom of the left and right mold bodies in each of the mold bodies 18 is vertically fixed with plug-in posts 2. A plug-in groove 41 is vertically opened inside the processing table 1, and the plug-in post 2 is slidably inserted into the plug-in groove 41. A limiting slot 42 is horizontally opened inside each plug-in post 2. A transmission plate 21 is slidably installed at the bottom of the processing table 1, and the number of transmission plates 21 is the same as the number of mold bodies 18. A limiting rod 22 is fixedly installed on both sides of the top of each transmission plate 21, and the limiting rod 22 and the limiting slot 42 are at the same horizontal position.

[0037] In some technical solutions (through Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown), a pushing mechanism is provided between the limiting mechanism and the sliding plate 27. The pushing mechanism includes a pushing rod 28. Each sliding plate 27 has a pushing rod 28 that is inclinedly hinged to its side via a rotating shaft. The side of the pushing rod 28 away from the sliding plate 27 is hinged to the bottom of the transmission plate 21 via a rotating shaft.

[0038] During operation, when the mold body 18 needs to be disassembled for surface cleaning and maintenance, the servo motor 34 is turned on via an external control switch, causing it to rotate synchronously with the rotating rod 31 located on the left side of the processing table 1. This, in turn, causes the transmission sprocket 32 ​​sleeved on its surface to rotate. Through the meshing transmission action of the transmission sprocket 32 ​​and the transmission chain 33, multiple sets of transmission sprockets 32 and the rotating rod 31 can be driven to rotate synchronously and in the same direction inside the mounting frame 3. Subsequently, under the connecting transmission action of the rotating rod 31, multiple sets of rotating lead screws 24 vertically arranged at the bottom of the processing table 1 can be driven synchronously. Furthermore, the lifting sleeve 25 rotates in the same direction, and under the combined rotational transmission action of the rotating screw 24 on the lifting sleeve 25, and the guiding and limiting action of the limiting groove 29 on the connecting block 26, the lifting sleeve 25 can be vertically lowered synchronously inside the hollow frame 23. This causes the sliding plate 27 to vertically lower synchronously along the outside of the hollow frame 23. Then, the push rod 28 converts the vertical movement force of the sliding plate 27 into a horizontal pushing force on the transmission plate 21, so that the transmission plates 21 located on both sides of the outside of the hollow frame 23 can move horizontally synchronously relative to each other, thereby driving the limiting rod 22 set on its top to move synchronously. The mold 18 moves horizontally within the movable slot 4, allowing multiple sets of limiting rods 22 located below the mold body 18 to simultaneously move horizontally out of the insertion pins 2. This causes the limiting rods 22 to lose their locking and limiting function on the insertion pins 2. The operator then lifts the mold body 18 from the surface of the processing table 1 and removes it, cleaning and maintaining its outer surface. When the mold body 18 needs to be installed and used, the insertion pins 2 at the bottom of the multiple sets of mold body 18 are aligned with the insertion slots 41 inside the processing table 1. Then, the servo motor 34 is turned on via an external control switch to reverse its rotation. The above steps are repeated. The transmission plates 21 located on both sides of the hollow frame 23 can move horizontally in opposite directions, thereby driving the limiting rod 22 to pass through the insertion groove 41 inside the insertion post 2, and then fixing the insertion post 2 stably inside the insertion groove 41, thereby completing the rapid installation and use of multiple sets of mold bodies 18. Then, the electric push rod 13 is activated, which drives the lifting frame 14 to move vertically in sync until the bottom of the discharge pipe 17 approaches the feed port aligned with the surface of the mold body 18. Then, the hot melt plastic for injection molding is transported into the mold body 18 through the feed pipe 16 and the corrugated hose to perform injection molding and shaping of the plastic preform.

[0039] Furthermore, the components included in the plastic preform injection molding device of the present invention, which is easy to disassemble and clean, are all general standard parts or parts known to those skilled in the art. Their structure and principle can be known to those skilled in the art through technical manuals or conventional experimental methods. In the idle part of the device, all the above-mentioned electrical components, which refer to power components, electrical components, and the matching monitoring computer and power supply, are connected by wires. The specific connection method should refer to the working principle below, and the electrical connection between each electrical component is completed in the order of operation. The detailed connection method is the well known technology in the art. The following mainly introduces the working principle and process, and does not describe the electrical control.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the scope of the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0041] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A plastic bottle embryo injection molding device convenient to disassemble and clean, comprising a processing table (1), characterized in that: The bottom four corner surfaces of the processing table (1) are vertically fixedly provided with supporting legs (11), the top of the processing table (1) is detachably provided with mold bodies (18), and the number of the mold bodies (18) is several groups, each of the mold bodies (18) comprises a left mold body and a right mold body, and the bottom of the processing table (1) is vertically fixedly provided with hollow frames (23); The outer side surfaces of each of the hollow frames (23) are slidably provided with sliding plates (27), each of the hollow frames (23) is internally rotatably provided with an adjusting mechanism, and the adjusting mechanism and the sliding plate (27) are drivingly connected, the adjusting mechanism comprises a rotating screw rod (24), each of the hollow frames (23) is internally vertically rotatably provided with the rotating screw rod (24) through a bearing, the outer side surface of each of the rotating screw rods (24) is movably sleeved with a lifting sleeve (25) through threads, each of the lifting sleeves (25) is connected with a connecting block (26), and the side edge of the connecting block (26) is fixedly connected with the outer side of the sliding plate (27), and the side edges of each of the hollow frames (23) are vertically provided with limiting sliding grooves (29) at both ends, and the connecting block (26) is slidably inserted into the limiting sliding groove (29), the bottom of the processing table (1) is slidably provided with a limiting mechanism, a pushing mechanism is arranged between the limiting mechanism and the sliding plate (27), the limiting mechanism comprises a limiting insertion rod (22) and an insertion column (2), the bottom of each of the left mold bodies and the right mold bodies in the mold bodies (18) is vertically fixedly provided with the insertion column (2), the inside of the processing table (1) is vertically provided with an insertion slot (41), and the insertion column (2) is slidably inserted into the insertion slot (41), the inside of each of the insertion columns (2) is horizontally provided with a limiting insertion slot (42), the bottom of the processing table (1) is slidably provided with a transmission plate (21), and the number of the transmission plates (21) is the same as that of the mold bodies (18), the top of each of the transmission plates (21) is fixedly provided with the limiting insertion rod (22) at both sides, and the limiting insertion rod (22) and the limiting insertion slot (42) are located at the same horizontal position, and the pushing mechanism comprises a pushing rod (28), each of the sliding plates (27) is obliquely hinged with the pushing rod (28) through an axis at the side edge, and the side, away from the sliding plate (27), of the pushing rod (28) is hinged with the bottom of the transmission plate (21) through an axis; The outer side bottom of the hollow frame (23) is horizontally fixedly provided with a mounting frame (3), the inside of the mounting frame (3) is provided with a synchronous mechanism, and the synchronous mechanism and the adjusting mechanism are drivingly connected, the synchronous mechanism comprises a transmission sprocket (32) and a transmission chain (33), the inside of the mounting frame (3) is vertically rotatably provided with a rotating rod (31) through a bearing, and the top of the rotating rod (31) is fixedly connected with the bottom of the rotating screw rod (24), the outer side surface of the middle end of each of the rotating rods (31) is fixedly sleeved with the transmission sprocket (32), the outer side of the transmission sprocket (32) is meshingly sleeved with a transmission chain ring, and the transmission chain ring is rotatably mounted in the inside of the mounting frame (3).

2. The plastic bottle preform injection molding apparatus of claim 1, wherein: The bottom of the processing table (1) is horizontally provided with a movable slot (4), the limiting inserting rod (22) is slidingly installed in the movable slot (4), and the movable slot (4) is communicated with the inserting slot (41), the both ends of the limiting inserting rod (22) are fixedly installed with guide rods (5), and the guide rods (5) are slidingly inserted into the processing table (1).

3. The plastic bottle preform injection molding apparatus of claim 1, wherein: The top of the processing table (1) is fixedly installed with a supporting frame (12), the both sides of the top of the supporting frame (12) are vertically fixedly installed with electric push rods (13), the bottom of the transmission shaft of the electric push rod (13) is fixedly installed with a lifting frame (14), and the lifting frame (14) is slidingly installed in the supporting frame (12).

4. The plastic bottle preform injection molding apparatus of claim 3, wherein: The lifting frame (14) is vertically fixedly installed with a plurality of groups of discharge pipes (17), the top of each discharge pipe (17) is fixedly communicated with a corrugated pipe (15), and the top of each corrugated pipe (15) is fixedly communicated with a feeding pipe (16).

5. The plastic bottle preform injection molding apparatus of claim 1, wherein: The bottom of the mounting frame (3) is fixedly installed with a servo motor (34), and the top of the transmission shaft of the servo motor (34) is fixedly connected with the bottom of the rotating rod (31) through a coupling.

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