Combined type blow molding device for plastic bottles

Abstract

The utility model relates to the technical field of blow molding devices, in particular to a combined type blow molding device for plastic bottles. The utility model provides a combined type blow molding device for plastic bottles, which comprises a rack, a mold assembly which is arranged on the upper part of the rack and is opened and closed in a front-back sliding manner, and an extrusion assembly which is positioned above the mold assembly and is used for extruding a molten rubber material into a mold in a vertical lifting manner is also arranged on the upper part of the rack; the upper part of the rack is also provided with a blow molding assembly which is positioned outside the extrusion assembly, is coaxially arranged with the extrusion assembly and is used for carrying out blow molding operation on a rubber material in the mold in a vertical lifting manner; according to the combined type blow molding device, the mold assembly, the extrusion assembly and the blow molding assembly are designed, so that the time required for horizontally moving and receiving materials can be saved through vertical concentric arrangement of the mold assembly, the extrusion assembly and the blow molding assembly; and integrated glue injection and blow molding operation with a simplified structure can be realized through sleeving arrangement of the extrusion assembly and the blow molding assembly.

Description

Technical Field

[0001] This application relates to the field of blow molding equipment technology, and more particularly to a composite blow molding device for plastic bottles. Background Technology

[0002] In traditional plastic bottle blow molding processes, the mold assembly is usually moved to the extrusion position to receive the molten rubber, and then moved to the blow molding position for blow molding. This process is not only time-consuming, but the multiple translation operations also increase the complexity of the equipment and energy consumption. It may also affect the dimensional accuracy and surface quality of the product. Therefore, it is particularly important to develop a blow molding device that can simplify the operation process, improve production efficiency, and ensure product quality. Utility Model Content

[0003] The problem this application aims to solve is that in existing plastic bottle blow molding, the mold assembly needs to be moved to the extrusion position to receive the molten rubber material, and then moved to the blow molding position for blow molding. This results in a blow molding process that is not only time-consuming, but also leads to complex equipment structure and high energy consumption.

[0004] To solve the above-mentioned technical problems, this application provides a composite blow molding device for plastic bottles, including a frame, a mold assembly that is opened and closed by sliding back and forth on the upper part of the frame, an extrusion assembly located above the mold assembly and extruding molten rubber into the mold by vertical lifting, and a blow molding assembly located outside the extrusion assembly and coaxially arranged therewith, which blow molding the rubber inside the mold by vertical lifting.

[0005] Because the composite blow molding equipment of this application includes a mold assembly, an extrusion assembly, and a blow molding assembly, it can save the time required for lateral material receiving by vertically concentrically arranging the mold assembly, extrusion assembly, and blow molding assembly. It can also achieve a simplified integrated injection and blow molding operation by nesting the extrusion assembly and blow molding assembly. This solves the problem that in the prior art of blow molding plastic bottles, the mold assembly needs to be moved to the extrusion position to receive the molten rubber material first, and then moved to the blow molding position for blow molding. This results in a blow molding process that is not only time-consuming, but also leads to complex equipment structure and high energy consumption. Attached Figure Description

[0006] Figure 1 This is a three-dimensional structural diagram of an embodiment.

[0007] Figure 2 This is a front view structural diagram of an embodiment.

[0008] Figure 3 This is a side view of the structure of an embodiment.

[0009] Figure 4 This is a schematic diagram of the blow-molded component.

[0010] Figure 5 This is a schematic diagram of the extrusion assembly.

[0011] Figure 6 This is a schematic diagram of the mold assembly.

[0012] In the diagram: 1. Extrusion assembly; 2. Blow molding assembly; 3. Mold assembly; 4. Frame; 5. Support plate; 6. Second cylinder; 7. Nozzle; 8. Third cylinder; 9. Horizontal plate; 10. Carrier plate; 11. Second guide rod; 12. Hose; 13. Movable seat; 14. Fixed seat; 15. Frame; 16. First guide rod; 17. Vertical plate; 18. Connecting rod; 19. First cylinder; 20. Pull rod. Detailed Implementation

[0013] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Example

[0014] This application relates to a composite blow molding device for plastic bottles, such as... Figure 1-6 As shown, the blow molding device includes a frame 4, a mold assembly 3, an extrusion assembly 1, and a blow molding assembly 2. The frame 4 serves as the basic support structure for the entire device, and its stable design ensures the stable operation of each component. The mold assembly 3 is located on the upper part of the frame 4 and is opened and closed by sliding back and forth. The mold assembly 3 is ingeniously designed and can open and close quickly and accurately. The extrusion assembly 1 is also located on the upper part of the frame 4 and above the mold assembly 3. It is responsible for extruding the molten rubber into the mold. The extrusion assembly 1 adopts a vertical lifting method to ensure that the rubber can be accurately and evenly filled into the mold. The blow molding assembly 2 is coaxially arranged outside the extrusion assembly 1 and also adopts a vertical lifting method. After the rubber is filled, the blow molding assembly 2 blows the rubber with high-pressure gas to make it adhere tightly to the inner wall of the mold. Since the blow molding assembly 2 and the extrusion assembly 1 are coaxially designed, the translation step of the mold assembly 3 is eliminated, which greatly simplifies the operation process.

[0015] During operation, mold assembly 3 is initially in the closed state, extrusion assembly 1 descends to the predetermined position, and molten rubber is extruded into the mold. After the rubber is filled, extrusion assembly 1 rises to reset, while blow molding assembly 2 descends to a position aligned with mold assembly 3. Subsequently, blow molding assembly 2 is activated, and high-pressure gas is used to blow mold the rubber in the mold, making it adhere tightly to the inner wall of the mold to form the desired plastic bottle shape. After blow molding is completed, blow molding assembly 2 rises to reset, mold assembly 3 opens, and the finished plastic bottle falls freely, completing one production cycle.

[0016] The mold assembly 3 includes a frame 15, a mold base, first guide rods 16, a first cylinder 19, a connecting rod 18, a tie rod 20, and a vertical plate 17. The frame 15 serves as the supporting structure for the mold assembly 3 and is fixedly arranged on the upper part of the machine frame 4 to ensure the stability and rigidity of the mold assembly 3. The mold base is divided into a fixed seat 14 and a movable seat 13. The fixed seat 14 is vertically arranged on the front side of the frame 15, serving as half of the mold. The movable seat 13 is horizontally arranged opposite to the fixed seat 14, and its movement enables the mold to open and close. First guide rods 16 are arranged around the frame 15. These guide rods can slide back and forth along the frame 15, supporting and guiding the movable seat 13 to ensure its stability during movement. For stability and accuracy, a vertical plate 17 is vertically arranged at one end of the first guide rod 16. The vertical plate 17 is linked with the first guide rod 16. The sliding of the first guide rod 16 drives the vertical plate 17 to move synchronously. The frame 4 is equipped with a first cylinder 19, which serves as the power source for the reciprocating motion of the movable seat 13. A tie rod 20 is horizontally placed at the center of the upper part of the vertical plate 17. The tie rod 20 serves as a connection. The end of the first cylinder 19 is connected to the frame 15 and the tie rod 20 respectively through two connecting rods 18. When the first cylinder 19 works, its end drives the connecting rod 18 to swing up and down. The connecting rod 18 then pulls the vertical plate 17 through the tie rod 20, causing the distance between the vertical plate 17 and the frame 15 to change.

[0017] With the above structure, when the first cylinder 19 is started, its piston rod pushes the connecting rod 18 to swing. The connecting rod 18 pulls the vertical plate 17 along the first guide rod 16 through the pull rod 20. At the same time, the transmission action of the connecting rod 18 and the pull rod 20 causes the movable seat 13 to move synchronously. When the movable seat 13 moves closer to the fixed seat 14, the mold closes; when the movable seat 13 moves away from the fixed seat 14, the mold opens. In this way, the closing and opening operations of the plastic bottle mold are realized through the drive of the first cylinder 19 and the transmission of the connecting rod 18 and the pull rod 20.

[0018] The blow molding assembly 2 includes a frame plate 5, a second cylinder 6, and an air nozzle 7. The frame plate 5 is Z-shaped, which not only enhances the structural strength of the frame plate 5 but also facilitates connection and fixation with other components. The frame plate 5 is fixedly arranged on the upper front side of the frame 15, above the mold assembly 3, providing a stable support platform for the second cylinder 6 and the air nozzle 7. The second cylinder 6 is vertically arranged on the lower surface of the frame plate 5, serving as the power source for the lifting and blowing operation of the air nozzle 7. The second cylinder 6 is connected to the air nozzle 7 through its piston rod, controlling the lifting and blowing action of the air nozzle 7. The air nozzle 7 is arranged at the end of the second cylinder 6, and the air nozzle 7 can rise and fall synchronously with the piston rod of the second cylinder 6. During the blow molding process, the air nozzle 7 is aligned with the end of the mold base, and high-pressure gas is blown into the rubber material inside the mold base to form the shape. The design of the air nozzle 7 takes into account the blow molding efficiency, gas distribution uniformity, and sealing with the mold base to ensure the production of high-quality plastic bottles.

[0019] During the blow molding operation, the second cylinder 6 is activated, and its piston rod pushes the nozzle 7 downward to the end of the mold base. At the same time, the extrusion assembly 1 extrudes the thermoplastic material and fills it into the mold. After the material is filled, the second cylinder 6 continues to push the nozzle 7 to fit tightly against the end of the mold base, forming a sealed space. Subsequently, high-pressure gas is blown into the mold through the nozzle 7 to blow mold the material. After the blow molding is completed, the second cylinder 6 drives the nozzle 7 to rise, and the mold assembly 3 performs an opening and closing operation to remove the molded plastic bottle.

[0020] The extrusion assembly 1 includes a horizontal plate 9, a second guide rod 11, a carrier plate 10, a third cylinder 8, and a hose 12. The horizontal plate 9 is arranged parallel to the upper part of the frame plate 5, providing a stable support platform for the extrusion assembly 1. The design of the horizontal plate 9 takes into account the connection stability with the frame plate 5 and the force distribution of the entire extrusion assembly 1, ensuring the stability and accuracy of the extrusion operation. The second guide rod 11, which is connected to the frame plate 5, is symmetrically arranged at both ends of the horizontal plate 9. The second guide rod 11 serves as a guide and support structure for the carrier plate 10, ensuring the stable sliding of the carrier plate 10 in the vertical direction. This design not only improves the rigidity of the extrusion assembly 1 but also facilitates precise control of the carrier plate 10. The carrier plate 10 slides vertically on the upper part of the second guide rod 11. The carrier plate 10 serves as a support and moving platform for the hose 12. Through the guiding action of the second guide rod 11, precise vertical movement is achieved. The design of the carrier plate 10 takes into account the connection method with the rubber tube 12 and the injection efficiency of the rubber material, ensuring smooth extrusion operation. A third cylinder 8 connected to the carrier plate 10 is arranged in the center of the upper part of the horizontal plate 9. It serves as the power source for the lifting and extrusion operation of the carrier plate 10. The third cylinder 8 is connected to the carrier plate 10 through its piston rod, controlling the lifting and lowering of the carrier plate 10 and the extrusion action of the rubber tube 12. The selection and working parameters of the third cylinder 8 are determined according to production needs and rubber material characteristics to ensure the stability and efficiency of the extrusion operation. A vertically arranged rubber tube 12 is arranged on the upper part of the carrier plate 10. The rubber tube 12 serves as the conveying and injection channel for the rubber material. Through the lifting and lowering movement of the carrier plate 10, the rubber material is accurately injected into the mold. The design of the rubber tube 12 takes into account factors such as the flowability of the rubber material, injection pressure, and injection volume to ensure the accuracy and consistency of the extrusion operation.

[0021] During the extrusion operation, the third cylinder 8 is activated, and its piston rod pushes the carrier plate 10 upward along the second guide rod 11. At the same time, the tube 12 is filled with thermoplastic material and is ready for injection. When the carrier plate 10 moves to the predetermined position, the tube 12 is aligned with the mold inlet. The third cylinder 8 continues to push the carrier plate 10, so that the tube 12 fits tightly against the mold inlet. Subsequently, the high-pressure material is injected into the mold through the tube 12, completing the extrusion operation. After extrusion, the third cylinder 8 drives the carrier plate 10 to descend, preparing for the next extrusion operation. It should be noted that the tube 12 is a metal tube used to transport the material, not a tube made of rubber.

[0022] In use, firstly, the drive mechanism of mold assembly 3 is activated, driving the movable seat 13 to move towards the fixed seat 14 and close tightly, forming a mold cavity for blow molding plastic bottles. Next, the third cylinder 8 of extrusion assembly 1 is activated, pushing the carrier plate 10 downwards along the second guide rod 11. The carrier plate 10 drives the rubber tube 12 downwards, aligning the outlet of the rubber tube 12 with the mold's feed port. Then, the high-pressure thermoplastic material in the rubber tube 12 is injected into the mold cavity under extrusion pressure, filling the entire mold space. After the material is filled, the second cylinder 6 of blow molding assembly 2 is activated, pushing the nozzle 7 downwards to the end of the mold base. The nozzle 7 fits tightly against the end of the mold base, forming a sealed space. Subsequently, high-pressure gas is blown into the mold cavity through the nozzle 7 to pressurize the rubber material. During blow molding, gas is evenly distributed within the mold cavity, causing the plastic material to adhere tightly to the inner wall of the mold, forming the desired plastic bottle shape. After blow molding is completed, the drive mechanism of mold assembly 3 is restarted, driving the movable seat 13 to move away from the fixed seat 14 to open the mold. At this time, the molded plastic bottle will fall under its own weight. If the plastic bottle is not falling stably enough, a lever structure driven by a cylinder can be added to apply a pushing force to the side of the fixed seat 14 or the movable seat 13 to make it fall. Finally, each component returns to its initial state to prepare for the next blow molding operation. The air nozzle 7 of the blow molding assembly 2 rises, the carrier plate 10 and the rubber tube 12 of the extrusion assembly 1 descend, and the mold assembly 3 remains open, waiting for the next mold closing.

[0023] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "a" or "the" can also be understood to convey either singular or plural usage.

[0024] It should be readily understood that the terms “on,” “above,” and “on top of” in this disclosure should be interpreted in the broadest possible sense, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on top of something” but also “on top of something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0025] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A composite blow molding device for plastic bottles, comprising a frame, characterized in that: The upper part of the frame is equipped with a mold assembly that opens and closes by sliding back and forth. The upper part of the frame is also equipped with an extrusion assembly located above the mold assembly and extruding molten rubber into the mold by vertical lifting. The upper part of the frame is also equipped with a blow molding assembly located outside the extrusion assembly and coaxially arranged with it, which performs blow molding operation on the rubber inside the mold by vertical lifting.

2. The composite blow molding device for plastic bottles according to claim 1, characterized in that: The mold assembly includes a frame, a mold base, and a first guide rod. The frame is fixedly arranged on the upper part of the machine frame. The mold base is divided into a fixed seat and a movable seat. The fixed seat is vertically arranged on the front side of the frame, and the movable seat is arranged horizontally opposite to the fixed seat. The frame is surrounded by a first guide rod that can slide back and forth along its vertical direction and is connected to the movable seat.

3. The composite blow molding device for plastic bottles according to claim 2, characterized in that: The mold assembly includes a vertical plate and a tie rod. One end of the first guide rod is vertically connected to the vertical plate, and a tie rod is horizontally placed at the center of the upper part of the vertical plate.

4. The composite blow molding device for plastic bottles according to claim 3, characterized in that: The mold assembly includes a first cylinder and a connecting rod. The first cylinder is arranged inside the frame, and the end of the first cylinder is connected to the frame and the tie rod respectively through two connecting rods.

5. The composite blow molding device for plastic bottles according to claim 1, characterized in that: The blow molding assembly includes a frame plate, a second cylinder, and an air nozzle. The frame plate is fixedly arranged on the upper front side of the frame and located above the mold assembly. The second cylinder is vertically arranged on the lower surface of the frame plate, and an air nozzle that is driven to rise and fall is arranged at the end of the second cylinder.

6. The composite blow molding device for plastic bottles according to claim 1, characterized in that: The extrusion assembly includes a horizontal plate, a second guide rod, and a carrier plate. The horizontal plate is arranged parallel to the upper part of the frame plate, and the second guide rods connected to the frame plate are symmetrically arranged at both ends of the horizontal plate. The carrier plate slides vertically on the upper part of the second guide rod.

7. The composite blow molding device for plastic bottles according to claim 6, characterized in that: The extrusion assembly includes a third cylinder and a rubber tube. The third cylinder, which is connected to the carrier plate, is arranged in the center of the upper part of the horizontal plate, and the rubber tube is arranged vertically on the upper part of the carrier plate.

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