Raw material mixing and feeding device of blow molding machine
By designing a raw material mixing and feeding device for blow molding machines, and utilizing airflow and blades to drive the mixing frame for multiple separations and spiral movements of the raw materials, the problems of uneven mixing and heat generation were solved, thus improving the consistency of product quality.
Patent Information
- Application Number
- CN202610033494.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-12
- Publication Date
- 2026-02-24
AI Technical Summary
Existing blow molding machines suffer from uneven mixing and heat generation during the raw material mixing process, which affects product quality.
A raw material mixing and feeding device for a blow molding machine was designed, including a feeding mechanism, a mixing mechanism and a storage mechanism. The device utilizes airflow and blades to drive the mixing frame for initial mixing and multiple separation of the raw materials. Combined with centrifugal force and spiral motion, it achieves uniform mixing of raw material particles.
It improves the uniformity of raw material mixing, avoids heat accumulation during the mixing process, and ensures the consistency of product performance and appearance quality.
Smart Images
Figure CN121552660A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of blow molding equipment technology, specifically to a raw material mixing and feeding device for a blow molding machine. Background Technology
[0002] In the plastic blow molding process, the uniform mixing of various raw materials such as base resin, recycled materials, masterbatch, and functional additives is a crucial preliminary step to ensure the stable performance and consistent appearance of the final product. Currently, the raw material handling of blow molding machines typically involves two main stages: a separate mixing process and a feeding process on the blow molding machine itself.
[0003] In existing technologies, mixing and feeding are mostly carried out through the following modes: One is to set up an independent mixer upstream of the production line, premix various raw materials evenly, and then send the premix into the hopper of the blow molding machine through a conveying device. Although this method can achieve good mixing, it increases the equipment footprint, energy consumption, and production steps, and there is a risk that the components of the premix may separate due to vibration or gravity during the conveying and settling process, affecting the final mixing uniformity.
[0004] Secondly, a motor-driven mechanical agitator is installed inside the feed hopper of the blow molding machine to mix the materials at the feeding point. However, the additional heat generated by the agitation may cause changes in the properties of some heat-sensitive raw materials.
[0005] The third method involves multiple raw materials being separately metered by their respective devices and then directly or through a simple collection pipe into a vertical feed pipe or hopper, where they fall into the extruder by gravity. This method has the simplest structure, lowest cost, and no additional energy consumption. However, during the descent, the different raw materials are essentially in a plunger or laminar flow state, resulting in extremely weak mixing. Mixing relies almost entirely on the subsequent shearing and melting processes within the extruder screw. For applications requiring highly uniform dispersion, insufficient initial mixing will significantly increase the mixing burden on the screw section, potentially leading to quality problems such as color differences, streaks, and uneven performance in the finished product.
[0006] In view of this, we propose a raw material mixing and feeding device for blow molding machines. Summary of the Invention
[0007] The purpose of this invention is to provide a raw material mixing and feeding device for a blow molding machine, which solves the problems of heat generation or uneven mixing during the mixing process mentioned in the background art.
[0008] To achieve the above objectives, the present invention provides the following technical solution: A raw material mixing and feeding device for a blow molding machine, comprising a housing; The feeding mechanism is used to feed raw materials; A mixing mechanism is used to mix raw materials of different particle sizes; Storage facilities are used for the temporary storage of raw material particles; The feeding mechanism is located on the outer shell, the mixing mechanism is located at the bottom of the outer shell, and the storage mechanism is located below the outer shell.
[0009] Preferably, the feeding mechanism includes two feeding pipes, which are symmetrically arranged on both sides of the outer shell. An exhaust pipe is fixedly connected to the top of the outer shell, and a feeding hopper is fixedly connected to the bottom of the outer shell.
[0010] Preferably, the mixing mechanism includes a mixing frame, which is rotatably connected to the top of the feed hopper. A guide block is detachably connected to the mixing frame, and a support frame is fixedly connected to the bottom of the guide block. A guide plate is fixedly connected to the support frame.
[0011] Preferably, the guide block is funnel-shaped, the guide plate is arranged in a circumferential array at the top of the support frame, the mixing frame is a ring-shaped structure, and the guide block is arranged inside the mixing frame.
[0012] Preferably, an installation block is fixedly connected to the inner wall of the mixing frame. The installation block has a "U" shaped structure, and a connecting block corresponding to the structure of the installation block is fixedly connected to the guide block.
[0013] Preferably, a sealing shell is fixedly connected to the outside of the feed hopper, the sealing shell is sleeved on the outside of the mixing frame, and the top of the sealing shell is an open structure.
[0014] Preferably, blades are fixedly connected to the outside of the mixing frame, and a plurality of blades are provided, which are arranged around the outside of the mixing frame.
[0015] Preferably, a fan is fixedly connected to the side of the outer casing, the air inlet of the fan and the exhaust pipe are connected to each other through a T-shaped pipe, and the exhaust end of the fan is connected to the inside of the sealed casing through a pipe.
[0016] Preferably, the storage mechanism includes a support frame connected to the side of the outer casing, a base fixedly connected to the ground and rotatably connected to the outside of the support frame, a storage box detachably connected to the support frame, and the end of the feed pipe disposed inside the storage box.
[0017] Preferably, an electric push rod is fixedly connected to the top of the base, and the end of the electric push rod is rotatably connected to the bracket via a connecting rod. A distance measuring sensor is fixedly connected to the bracket.
[0018] By means of the above technical solution, the present invention provides a raw material mixing and feeding device for a blow molding machine, which has at least the following beneficial effects: (1) The present invention uses a top-exhaust side-feeding shell to guide the movement path of raw material particles inside the shell by airflow, so that the raw material particles can form a working material similar to a cyclone separator inside the shell. That is, the raw material particles are thrown towards the inner wall of the shell under the action of centrifugal force and move in a spiral trajectory on the inner wall of the shell. At the same time, since the raw material particles have a certain weight, the raw material particles will not be blown to the outside of the shell by the airflow. In addition, as the raw material is continuously fed, the spiral movement trajectories of multiple raw material particles intersect each other, thereby realizing the initial mixing operation of the raw material. The airflow mixing method can improve the mixing effect between raw material particles on the one hand, and avoid the generation of heat during mixing on the other hand.
[0019] (2) The present invention can use the large amount of gas discharged by the fan to drive the blades to move, thereby driving the mixing frame to rotate through the blades, so that the aggregated raw material particles are thrown out to the surroundings again and mixed again after moving into the feed hopper. This allows different particles to undergo multiple mixing and separation operations inside the device, which can effectively improve the mixing effect between raw material particles. Attached Figure Description
[0020] The accompanying drawings, which are provided to further illustrate the invention, constitute a part of this application: Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the feeding mechanism of the present invention; Figure 4 This is a schematic diagram of the hybrid mechanism structure of the present invention; Figure 5 This is a schematic diagram of the internal structure of the hybrid mechanism of the present invention. Figure 1 ; Figure 6 This is a schematic diagram of the internal structure of the hybrid mechanism of the present invention. Figure 2 ; Figure 7 This is a schematic diagram of the guide block structure of the present invention; Figure 8 This is a schematic diagram of the hybrid frame structure of the present invention; Figure 9 This is a schematic diagram of the storage mechanism structure of the present invention; Figure 10 This is a schematic diagram of the internal structure of the storage mechanism of the present invention.
[0021] In the diagram: 1. Outer shell; 2. Feeding mechanism; 21. Feeding pipe; 22. Exhaust pipe; 23. Feeding hopper; 24. Fan; 3. Mixing mechanism; 31. Mixing frame; 32. Guide block; 33. Guide plate; 34. Support frame; 35. Connecting block; 36. Mounting block; 37. Sealing shell; 38. Blade; 4. Storage mechanism; 41. Bracket; 42. Storage box; 43. Electric push rod; 44. Distance sensor. Detailed Implementation
[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0023] A raw material mixing and feeding device for a blow molding machine, such as Figures 1-10 As shown, it includes an outer shell 1; a feeding mechanism 2 is provided on the outer shell 1 for feeding raw materials; a mixing mechanism 3 is provided at the bottom of the outer shell 1 for mixing raw materials of different particle sizes; and a storage mechanism 4 is provided below the outer shell 1 for temporarily storing raw material particles.
[0024] Specifically, the feeding mechanism 2 includes two feeding pipes 21, symmetrically arranged on both sides of the outer shell 1. The feeding pipes 21 are used to feed raw materials, allowing different materials to be simultaneously drawn into the outer shell 1. The ends of the feeding pipes 21 are fixedly connected to the tangent of the cylindrical outer shell 1. Raw materials entering tangentially move in a spiral trajectory along the inner wall of the cylinder after entering the outer shell 1, ensuring that different materials fall evenly to different positions at the bottom of the outer shell 1. An exhaust pipe 22 is fixedly connected to the top of the outer shell 1, venting air from inside the shell 1 to create a low-pressure environment, which, in conjunction with the feeding pipes 21, enables the feeding of multiple raw material particles. A feeding hopper 23 is fixedly connected to the bottom of the outer shell 1, collecting the raw materials inside for subsequent loading into the extruder.
[0025] Furthermore, the mixing mechanism 3 includes a mixing frame 31, which is rotatably connected to the top of the feed hopper 23. The mixing frame 31 supports the mixing mechanism 3 and has a circular structure. The mixing frame 31 corresponds to the bottom end of the outer shell 1 and the top end of the feed hopper 23, allowing the mixing frame 31 to rotate between the outer shell 1 and the feed hopper 23. A guide block 32 is detachably connected to the inner side of the mixing frame 31. The guide block 32 has a funnel-shaped structure, which is wider at the top and narrower at the bottom. This funnel-shaped guide block 32 can easily guide the raw material particles from the bottom edge of the outer shell 1 to the center, thus achieving mixing of the raw material particles. A support frame 34 is fixedly connected to the bottom of the guide block 32, and a guide plate 33 is fixedly connected to the top of the support frame 34. The guide block 32 is used to install the support frame 34 and the guide plate 33 onto the mixing frame 31. There are several guide plates 33 arranged in a circular array at the top of the support frame 34, and the guide plates 33 are spaced at the same distance. The support frame 34 has an umbrella-shaped structure, and the inclination angle of the edge of the support frame 34 is close to the angle of the bottom of the guide block 32. The umbrella-shaped support frame 34 can use centrifugal force to drive the raw material particles to move outward when rotating. When the raw material particles move into the feed hopper 23, they move along the feed hopper 23, thereby mixing the raw material particles twice and improving the mixing effect of the raw materials.
[0026] Furthermore, an installation block 36 is fixedly connected to the inner wall of the mixing frame 31. The installation block 36 has a "U" shaped structure. A connecting block 35 corresponding to the structure of the installation block 36 is fixedly connected to the guide block 32. The installation block 36 can cooperate with the connecting block 35 to support the guide block 32, so that the guide block 32 can be easily installed on the mixing frame 31 or removed from the mixing frame 31 for maintenance.
[0027] Based on this, a sealing shell 37 is fixedly connected to the outside of the feed hopper 23. The sealing shell 37 is sleeved on the outside of the mixing frame 31. The top of the sealing shell 37 is an open structure. The sealing shell 37 covers the outside of the feed hopper 23 to protect the mixing frame 31 and provide an independent environment for the mixing frame 31.
[0028] In addition, blades 38 are fixedly connected to the outside of the mixing frame 31. Several blades 38 are arranged around the outside of the mixing frame 31, and each blade 38 has a bowl-shaped or cup-shaped structure. One side of each blade 38 is a hollow concave surface, and the other side is a smooth, curved convex surface. When air blows towards the concave surface, the air is trapped, generating greater resistance; when it blows towards the convex surface, the airflow smoothly bypasses it, resulting in less resistance. This resistance difference generates an asymmetrical torque on the mixing frame 31, causing it to rotate. The higher the airflow velocity, the more pronounced the resistance difference and the faster the rotation. The bowl-shaped curved surface guides the airflow to separate smoothly, reducing speed fluctuations caused by random turbulence and improving the stability of the mixing frame 31 during rotation.
[0029] It is worth noting that a fan 24 is fixedly connected to the side of the outer casing 1. The air inlet of the fan 24 is connected to the exhaust pipe 22 via a T-connector. The T-connector is used to connect to the external environment. When the air drawn out by the exhaust pipe 22 is insufficient, it can be supplemented through the other end of the T-connector. At the same time, a solenoid valve is connected to the T-connector. The solenoid valve is located on the branch of the T-connector away from the fan 24 and the outer casing 1. It is used to control the closure of the branch of the T-connector when the fan 24 is started, so that the fan 24 is directly connected to the inside of the outer casing 1 and isolated from the outside environment, thus avoiding insufficient pressure inside the outer casing 1. During the feeding operation, when feeding begins, the solenoid valve controls the opening of the branch pipe of the three-way pipe. This allows the branch pipe connected to the outside to be opened simultaneously while maintaining the connection between the blower 24 and the outer casing 1, supplementing the intake air volume of the blower 24. This ensures that the blower 24 can provide sufficient power to the blades 38. The exhaust end of the blower 24 is connected to the inside of the sealing shell 37 through a pipe. The blower 24 can provide power to the feeding mechanism 2 and the mixing mechanism 3. The end of the exhaust end of the blower 24 corresponds to the position of the blades 38, allowing the air discharged from the blower 24 to be directly blown onto the blades 38. At the same time, the sealing shell 37 is an open structure, and because the outer casing 1 forms a principle similar to a cyclone dust collector, the air discharged from the exhaust pipe 22 will not carry dust or fine raw material particles. After driving the blades 38, the unpowered air dissipates into the outside environment.
[0030] Furthermore, the storage mechanism 4 includes a support 41 connected to the side of the outer casing. A base fixed to the ground is rotatably connected to the outside of the support 41. The base has a U-shaped structure and is wrapped around the bottom of the support 41. One end of the support 41 is rotatably connected to the inside of the base. A storage box 42 is detachably connected to the support 41. The end of the feed pipe 21 is located inside the storage box 42. The storage box 42 can temporarily store raw material particles, facilitating the feeding of raw materials into the outer casing 1 through the feed pipe 21.
[0031] Based on this, an electric push rod 43 is fixedly connected to the top of the base. The end of the electric push rod 43 is rotatably connected to the bracket 41 via a connecting rod, which is connected to the end of the bracket 41 away from the hinge point. A distance sensor 44 is fixedly connected to the bracket 41. The electric push rod 43 can drive the bracket 41 to rotate, so that when one side of the material pile is emptied, the idle raw material on the other side is tilted and slid down to the side of the feed pipe 21 through the tilted storage box 42. The distance sensor 44 can monitor the remaining amount of raw material particles inside the storage box 42.
[0032] In use, the blow molding machine raw material mixing and feeding device of the present invention starts the blower 24 to continuously extract air from the inside of the outer shell 1, creating a low-pressure state inside the outer shell 1. At this time, the feeding pipe 21, which is connected to the outer shell 1, draws raw material particles from the storage tank 42 into the outer shell 1. After entering the outer shell 1, the raw material particles move along the inner wall of the outer shell 1 in a spiral trajectory. Therefore, the spiral movement trajectories of the raw materials drawn in by the two feeding pipes 21 intersect, thereby initially mixing the two types of raw material particles. After the raw material particles fall to the bottom of the inner shell 1, they are guided to the center of the support frame 34 by the funnel-shaped guide block 32, where the continuously accumulating raw material particles are mixed again. At the same time, the air drawn from the inside of the outer shell 1 by the blower 24 is discharged into the sealed shell 37 through the pipe. The air drives the mixing frame 31 to rotate continuously through the blades 38. The centrifugal force generated by the rotation of the mixing frame 31 throws the raw material particles in the center outward and they fall into the feeding hopper 23, where the feeding operation is completed. It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A raw material mixing and feeding device for a blow molding machine, characterized in that: It includes a housing (1); A feeding mechanism (2) for feeding raw materials; A mixing mechanism (3) for mixing raw materials of different particles; A storage mechanism (4) for temporarily storing raw material particles; The feeding mechanism (2) is arranged on the housing (1), the mixing mechanism (3) is arranged at the bottom end of the housing (1), and the storage mechanism (4) is arranged below the housing (1).
2. The raw material mixing and feeding device for a blow molding machine according to claim 1, characterized in that: The feeding mechanism (2) includes a feeding pipe (21). There are two feeding pipes (21), and the two feeding pipes (21) are symmetrically arranged on both sides of the housing (1). An exhaust pipe (22) is fixedly connected to the top end of the housing (1), and a feed hopper (23) is fixedly connected to the bottom end of the housing (1).
3. The raw material mixing and feeding device for a blow molding machine according to claim 1, characterized in that: The mixing mechanism (3) includes a mixing frame (31). The mixing frame (31) is rotatably connected to the top end of the feed hopper (23). A guiding block (32) is detachably connected to the mixing frame (31). A support frame (34) is fixedly connected to the bottom end of the guiding block (32), and a guiding plate (33) is fixedly connected to the support frame (34).
4. The raw material mixing and feeding device for a blow molding machine according to claim 3, characterized in that: The guiding block (32) is funnel-shaped. The guiding plates (33) are arranged in a circumferential array at the top end of the support frame (34). The mixing frame (31) is of an annular structure, and the guiding block (32) is arranged inside the mixing frame (31).
5. The raw material mixing and feeding device for a blow molding machine according to claim 4, characterized in that: An installation block (36) is fixedly connected to the inner wall of the mixing frame (31). The installation block (36) is of a "U" - shaped structure. A connecting block (35) corresponding to the structure of the installation block (36) is fixedly connected to the guiding block (32).
6. The raw material mixing and feeding device for a blow molding machine according to claim 2, characterized in that: A sealing shell (37) is fixedly connected to the outside of the feed hopper (23). The sealing shell (37) is sleeved outside the mixing frame (31), and the top end of the sealing shell (37) is of an open structure.
7. The raw material mixing and feeding device for a blow molding machine according to claim 3, characterized in that: Blades (38) are fixedly connected to the outside of the mixing frame (31). There are several blades (38), and the blades (38) are arranged around the outside of the mixing frame (31).
8. The raw material mixing and feeding device for a blow molding machine according to claim 1, characterized in that: A blower (24) is fixedly connected to the side of the housing (1). The air inlet end of the blower (24) is interconnected with the exhaust pipe (22) through a three - way pipe, and the air outlet end of the blower (24) is interconnected with the inside of the sealing shell (37) through a pipeline.
9. A raw material mixing and feeding device for a blow molding machine according to claim 2, characterized in that: The storage mechanism (4) includes a bracket (41). The bracket (41) is connected to the side of the housing. A base fixedly connected to the ground is rotatably connected to the outside of the bracket (41). A storage box (42) is detachably connected to the bracket (41), and the end of the feeding pipe (21) is arranged inside the storage box (42).
10. A raw material mixing and feeding device for a blow molding machine according to claim 9, characterized in that: An electric push rod (43) is fixedly connected to the top end of the base, and the end of the electric push rod (D43) is rotatably connected to the bracket (41) through a connecting rod. A distance measuring sensor (44) is fixedly connected to the bracket (41).