Spraying-free plastic injection molding processing device

Abstract

The utility model discloses a spraying-free plastic injection molding processing device which comprises an injection molding machine, a charging barrel, a motor, a top cover rotationally provided with a connecting shaft and a transmission assembly, a U-shaped frame is fixedly installed on one side of the connecting shaft, a pair of connecting rods are rotationally installed on one side of the U-shaped frame in parallel through a rotating shaft, and arc-shaped plates are fixedly installed at the two ends of each connecting rod respectively. An inner cavity with openings in the two ends is formed in the center of the U-shaped frame, and the rotating shaft extends into the inner cavity and is connected with the transmission assembly. The stirring mechanism assembled by the U-shaped frame, the connecting rod, the arc-shaped plate and the transmission component is arranged on one side of the connecting shaft, and the connecting rod and the arc-shaped plate rotate around the shaft through matching of the transmission component while the U-shaped frame rotates around the connecting shaft, so that the purpose of turning and stirring plastic particles in the charging barrel is achieved, the water content of the plastic particles is controlled, and the injection molding quality requirement is met.

Description

Technical Field

[0001] This utility model relates to the field of injection molding technology, specifically to a paint-free plastic injection molding processing device. Background Technology

[0002] Paint-free plastics are made by adding high-gloss powder, pearl powder, metallic powder, ceramic powder, etc. to a specific resin through melt blending, and after compatibility modification, they are injection molded by an injection molding machine.

[0003] To ensure injection molding quality, the plastic particles need to be dried and controlled to a moisture content of less than 5%. However, the stirring device in the barrel of a conventional injection molding machine only performs simple circular motion to stir the plastic particles. The plastic particles at the bottom of the barrel are not completely dried, which affects the gloss of the injection molded parts. Utility Model Content

[0004] The purpose of this invention is to provide a paint-free plastic injection molding device to solve the problem mentioned in the background art that the stirring mechanism of the conventional injection molding machine barrel is inconvenient to stir the plastic particles at the bottom of the barrel, resulting in uneven drying of the plastic particles and affecting the quality of the injection molded parts.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a paint-free plastic injection molding device, comprising an injection molding machine, a barrel, a motor, a top cover rotatably mounted with a connecting shaft, and a transmission assembly. A U-shaped frame is fixedly mounted on one side of the connecting shaft, and a pair of connecting rods are rotatably mounted on one side of the U-shaped frame via a rotating shaft. Arc-shaped plates are fixedly mounted on both ends of the connecting rods. An inner cavity with openings at both ends is provided at the center of the U-shaped frame, and the rotating shaft extends into the inner cavity and is connected to the transmission assembly.

[0006] The transmission assembly includes a pressure rod slidably mounted in the inner cavity, a gear fixedly sleeved on the rotating shaft, and racks meshing with the gears at corresponding positions on the pressure rod and the gear. The top of the pressure rod extends through the outer cavity and is fixedly mounted with a bullseye bearing. The bullseye bearing extends through an elastic member to contact the bottom wall of the top cover. A pair of trapezoidal blocks are fixedly mounted on the bottom of the top cover so that the bullseye bearings abut against the trapezoidal blocks when the U-shaped frame moves in a circular motion around the connecting shaft. The pressure rod, in conjunction with the rack and gear, drives the connecting rod to rotate around the rotating shaft and evenly dry the plastic particles.

[0007] Preferably, the pressure bar has an H-shaped structure.

[0008] Preferably, a baffle is fixedly installed at the center of the inner cavity of the barrel, and the elastic member is a spring fixedly installed between the baffle and the pressure rod.

[0009] Preferably, a pair of racks are disposed opposite each other on the inner wall of the pressure bar.

[0010] Preferably, the cross-section of the arc-shaped plate has a herringbone structure.

[0011] Preferably, a pair of adjacent arc-shaped plates are arranged symmetrically about the axis of rotation.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention features a stirring mechanism consisting of a U-shaped frame, connecting rod, arc plate, and transmission assembly, installed on one side of the connecting shaft. As the U-shaped frame rotates around the connecting shaft, the connecting rod and arc plate rotate around the shaft in cooperation with the transmission assembly, thereby achieving the purpose of mixing plastic particles in the material cylinder, controlling the moisture content of the plastic particles, and meeting the injection molding quality requirements. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0015] Figure 2 This is a three-dimensional structural diagram of the top cover, connecting shaft, and U-shaped frame assembly of this utility model;

[0016] Figure 3 This is a three-dimensional structural diagram of the connection shaft and U-shaped frame assembly of this utility model;

[0017] Figure 4 This is a three-dimensional structural diagram of the transmission component of this utility model.

[0018] In the diagram: 1. Injection molding machine; 2. Barrel; 3. Top cover; 4. Motor; 5. Trapezoidal block; 6. Connecting shaft; 7. U-shaped frame; 8. Connecting rod; 9. Arc plate; 10. Pressure rod; 11. Bullseye bearing; 12. Baffle; 13. Rotating shaft; 14. Gear; 15. Rack. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1 and Figure 2This utility model provides a technical solution: a paint-free plastic injection molding device, including an injection molding machine 1, a barrel 2, a motor 4, a top cover 3 rotatably mounted with a connecting shaft 6, and a transmission assembly. The top of the motor 4 passes through the top cover 3 and is fixedly connected to the output end of the motor 4. A connecting pipe is provided through the top of the top cover 3 for connecting to an existing vacuum pump to convey plastic particles into the barrel 2. A drying mechanism (not shown in the figure) is installed on one side of the barrel 2 to control the drying of the plastic particles to a moisture content of less than 5%. A U-shaped frame 7 is fixedly installed on one side of the connecting shaft 6. A pair of connecting rods 8 are rotatably mounted in parallel on one side of the U-shaped frame 7 via a rotating shaft 13. Arc-shaped plates 9 are fixedly installed at both ends of the connecting rods 8. The cross-section of the arc-shaped plates 9 is a herringbone structure. The advantage of this arrangement is that... When the connecting rod 8 drives the arc plate 9 to make a circular motion around the rotating shaft 13, the arc plate 9 of the arc structure is obliquely inserted into the plastic particles to reduce resistance. Adjacent pairs of arc plates 9 are symmetrically arranged around the rotating shaft 13 so that the pair of arc plates 9 are inserted into the plastic particles and drive the particles to be evenly stirred in the barrel 2. The U-shaped frame 7 has an inner cavity with openings at both ends at the center position. The rotating shaft 13 extends into the inner cavity and is connected to the transmission component. This application sets a stirring mechanism assembled by the U-shaped frame 7, connecting rod 8, arc plate 9 and transmission component on one side of the connecting shaft 6. While the U-shaped frame 7 rotates around the connecting shaft 6, the connecting rod 8 and arc plate 9 rotate around the shaft in cooperation with the transmission component to achieve the purpose of stirring the plastic particles in the barrel 2, so as to control the moisture content of the plastic particles and meet the injection molding quality requirements.

[0021] Please see Figures 2-4The transmission assembly includes a pressure rod 10 slidably installed in the inner cavity, a gear 14 fixedly sleeved on the rotating shaft 13, and racks 15 meshing with the gears 14 fixedly installed at corresponding positions on the pressure rod 10 and the gears 14. A pair of racks 15 are arranged opposite each other on the inner wall of the pressure rod 10. The top of the pressure rod 10 extends through the outer part of the inner cavity and is fixedly installed with a bullseye bearing 11. The bullseye bearing 11 extends through an elastic member to contact the bottom wall of the top cover 3. A baffle 12 is fixedly installed at the center of the inner cavity of the material cylinder 2. The pressure rod 10 has an H-shaped structure. The elastic member is a spring fixedly installed between the baffle 12 and the pressure rod 10. A pair of trapezoidal blocks 5 are fixedly installed at the bottom of the top cover 3. The corners of the trapezoidal blocks 5 and the connection with the inner wall of the top cover 3 are rounded. The rounded corners provide a smooth transition, which allows the bullseye bearing 11 to slide smoothly along the connecting shaft 6 on the inner wall of the top cover 3. This ensures that when the U-shaped frame 7 rotates around the connecting shaft 6, the bullseye bearing 11 contacts the trapezoidal block 5. The pressure rod 10, in conjunction with the rack 15 and gear 14, drives the connecting rod 8 to rotate around the rotating shaft 13, thus drying the plastic particles evenly. During operation, the motor 4 is started, which drives the connecting shaft 6 and the U-shaped frame 7 to rotate inside the material cylinder 2. When the bullseye bearing 11 rotates to contact the trapezoidal block 5, it will contact the inclined side of the trapezoidal block 5, causing the pressure rod 10 to compress the spring. The rack 15 is then forced to move downwards and engages with the gear 14, driving the connecting rod 8 and the arc plate 9 to rotate and stir the plastic particles inside the material cylinder 2, ensuring that the plastic particles are dried evenly and guaranteeing the injection molding quality.

[0022] 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.

[0023] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A paint-free plastic injection molding processing device, characterized in that: The device includes an injection molding machine (1), a barrel (2), a motor (4), a top cover (3) with a connecting shaft (6) rotatably mounted, and a transmission assembly. A U-shaped frame (7) is fixedly mounted on one side of the connecting shaft (6). A pair of connecting rods (8) are rotatably mounted on one side of the U-shaped frame (7) via a rotating shaft (13). Arc plates (9) are fixedly mounted on both ends of the connecting rods (8). An inner cavity with openings at both ends is provided at the center of the U-shaped frame (7). The rotating shaft (13) extends into the inner cavity and is connected to the transmission assembly. The transmission assembly includes a pressure rod (10) slidably installed in the inner cavity, a gear (14) fixedly sleeved on the rotating shaft (13), and racks (15) meshing with the gears (14) respectively fixedly installed at the corresponding positions of the pressure rod (10) and the gears (14). The top of the pressure rod (10) extends through the outer part of the inner cavity and is fixedly installed with a bullseye bearing (11). The bullseye bearing (11) extends through an elastic member to contact the bottom wall of the top cover (3). A pair of trapezoidal blocks (5) are fixedly installed at the bottom of the top cover (3) so that when the U-shaped frame (7) moves in a circular motion around the connecting shaft (6), the bullseye bearing (11) abuts against the trapezoidal blocks (5). The pressure rod (10) meshes with the racks (15) and the gears (14) to drive the connecting rod (8) to rotate around the rotating shaft (13) and evenly dry the plastic particles.

2. The paint-free plastic injection molding device according to claim 1, characterized in that: The pressure bar (10) has an H-shaped structure.

3. The paint-free plastic injection molding device according to claim 1, characterized in that: A baffle (12) is fixedly installed at the center of the inner cavity of the material cylinder (2), and the elastic component is a spring fixedly installed between the baffle (12) and the pressure rod (10).

4. The paint-free plastic injection molding device according to claim 1, characterized in that: A pair of racks (15) are arranged opposite each other on the inner wall of the pressure bar (10).

5. The paint-free plastic injection molding device according to claim 1, characterized in that: The cross-section of the arc plate (9) is a herringbone structure.

6. The paint-free plastic injection molding device according to claim 1, characterized in that: The adjacent pair of arc-shaped plates (9) are arranged symmetrically about the axis of rotation (13).

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