A fully automatic injection molding machine

Abstract

This utility model relates to the field of fully automatic injection molding machine technology, specifically a fully automatic injection molding machine, including a storage tank, a stirring mechanism, and a preheating mechanism. The output end of the storage tank is connected to an injection molding cylinder assembly. The stirring mechanism consists of a rotating tube rotatably connected to the top of the storage tank, a first stirring blade installed on one side of the outer circumference of the rotating tube, and a second stirring blade installed on the other side of the outer circumference of the rotating tube. The preheating mechanism consists of an adjustable connecting pipe installed at the top of the rotating tube, a distribution pipe connected to the bottom of the connecting pipe, and a nozzle installed at the output end of the distribution pipe. This utility model facilitates thorough stirring of the injection molding material through the stirring mechanism, preventing clumping and affecting the injection molding effect. The preheating mechanism allows for the uniform delivery of hot air to the rotating stirring mechanism during the preheating time of the injection molding cylinder assembly, thereby fully preheating the material, shortening the material melting time, and improving injection molding efficiency.

Description

Technical Field

[0001] This utility model relates to the field of fully automatic injection molding machine technology, specifically a fully automatic injection molding machine. Background Technology

[0002] Injection molding machines are the main molding equipment used to make various shapes of plastic products from thermoplastic or thermosetting plastics using plastic molding dies.

[0003] Chinese patent CN222972658U discloses a fully automatic overmolding injection molding machine, belonging to the field of injection molding machines. It includes a material storage tank with a rotating replacement assembly on its lower surface. When the nozzle becomes clogged due to the accumulation of impurities after prolonged use, the operator activates an electric push rod to disengage the sealing ring from the nozzle surface. Then, the first motor is activated to rotate the rotating ring 90 degrees, reinstalling a new nozzle onto the lower surface of the extrusion tube. The sealing ring then seals the connection between the nozzle and the extrusion tube, significantly improving the nozzle replacement speed and allowing the overmolding injection molding machine to continue normal operation, thus greatly improving the equipment's efficiency.

[0004] However, the above-mentioned publicly available solutions have the following shortcomings: When the injection molding material in the storage tank enters the extrusion tube, if the injection molding material is to be melted quickly, the heating layer in the extrusion tube needs to be started in advance for a certain period of time, which leads to a prolongation of processing time and a reduction in injection molding efficiency. Utility Model Content

[0005] The purpose of this invention is to address the problems existing in the background technology by proposing a fully automatic injection molding machine.

[0006] The technical solution of this utility model is as follows: A fully automatic injection molding machine, comprising: a storage tank, the output end of which is connected to an injection cylinder assembly, and an electric valve is provided at the connection between the storage tank and the injection cylinder assembly; a stirring mechanism, which consists of a rotating tube rotatably connected to the top of the storage tank, a first stirring blade installed on one side of the outer circumference of the rotating tube, and a second stirring blade installed on the other side of the outer circumference of the rotating tube, the rotating tube being driven to rotate by the rotating mechanism, air inlets being provided between the first stirring blade and the rotating tube, and between the second stirring blade and the rotating tube, and multiple sets of air outlets being provided on the first stirring blade and the second stirring blade, with protective nets installed outside the air outlets; and a preheating mechanism, which consists of an adjustable connecting pipe installed at the top of the rotating tube, a diverter pipe communicating with the bottom of the connecting pipe, and a nozzle installed at the output end of the diverter pipe, the input end of the connecting pipe being connected to an external hot air supply mechanism, the diverter pipe extending into the inner cavity of the rotating tube, and the diverter pipe being distributed between the two sets of air inlets.

[0007] Preferably, the storage hopper consists of a hopper body, a sealing door hinged to the side wall of the hopper body, a cover plate detachably installed on the top of the hopper body, and a feed pipe connected to the bottom of the hopper body. The output end of the feed pipe is connected to the input end of the injection molding cylinder assembly, and the end of the sealing door away from the hinged end is connected to the hopper body by a latch.

[0008] Preferably, the rotating mechanism includes: a housing mounted on the top of the storage hopper; and a gear transmission assembly consisting of a gear and a gear ring, wherein the gear is driven to rotate by a servo motor in the housing, and the gear ring is mounted on the outer wall of the rotating tube and meshes with the gear.

[0009] Preferably, the connecting pipe is mounted on the chassis, and the rotating pipe is rotatably connected to the connecting pipe via a bearing.

[0010] Preferably, multiple sets of the first and second stirring blades are provided, and the first and second stirring blades are staggered along the height direction on both sides of the outer peripheral surface of the rotating tube.

[0011] Preferably, the preheating mechanism also includes mounting plates, with multiple sets of mounting plates and multiple sets of distribution pipes. The distribution pipes are connected to the mounting plates, and the multiple distribution pipes have different lengths. The multiple sets of mounting plates are evenly distributed along the height direction of the inner wall of the rotating pipe. The mounting plates are rotatably connected to the inner wall of the rotating pipe through bearings. There are two sets of air inlets distributed between two adjacent sets of mounting plates, and the nozzles are distributed between two adjacent sets of mounting plates.

[0012] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial technical effects: the stirring mechanism facilitates the full stirring of the injection molding raw material, avoiding clumping and affecting the injection molding effect; the preheating mechanism facilitates the use of the preheating time of the injection molding cylinder assembly to uniformly deliver hot air to the rotating stirring mechanism, thereby fully preheating the raw material, shortening the raw material melting time, and improving the injection molding efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of the storage bin of this utility model;

[0015] Figure 3 This is a schematic diagram showing the connection between the preheating mechanism and the stirring mechanism of this utility model;

[0016] Figure 4 This is a schematic diagram of the preheating mechanism of this utility model.

[0017] Reference numerals: 1. Barrel body; 101. Sealing door; 102. Cover plate; 103. Feed valve; 104. Feed pipe; 2. Injection molding cylinder assembly; 3. Chassis; 4. Rotating pipe; 401. Air inlet; 402. First stirring blade; 403. Second stirring blade; 404. Air outlet; 405. Protective net; 406. Third stirring blade; 5. Connecting pipe; 501. Mounting plate; 502. Diverter pipe; 503. Nozzle. Detailed Implementation

[0018] Example 1

[0019] like Figures 1 to 4 As shown, this utility model proposes a fully automatic injection molding machine, including: a storage tank, a stirring mechanism, and a preheating mechanism; the output end of the storage tank is connected to an injection cylinder assembly 2, and an electric valve is provided at the connection between the storage tank and the injection cylinder assembly 2. The injection cylinder assembly 2 is existing technology and mainly includes key components such as a screw and a barrel, which is responsible for heating and plasticizing the injection raw material discharged from the storage tank and injecting the molten plastic into the mold cavity. The specific structure will not be described in detail. The stirring mechanism consists of a rotating tube 4 rotatably connected to the top of the storage tank via a bearing, a first stirring blade 402 installed on one side of the outer circumference of the rotating tube 4, and a second stirring blade 403 installed on the other side of the outer circumference of the rotating tube 4. The rotating tube 4 is driven to rotate by the rotating mechanism, and the first stirring blade 402 and the rotating tube 4 are connected by a rotating mechanism. An air inlet 401 is provided between the second stirring blade 403 and the rotating tube 4. Multiple sets of air outlets 404 are provided on the first stirring blade 402 and the second stirring blade 403. A protective net 405 is installed on the outside of the air outlet 404. The rotating tube 4, the first stirring blade 402 and the second stirring blade 403 are all made of heat-conducting material to facilitate the absorption of heat from the internal hot air and contact with the injection molding raw material for heating. The preheating mechanism consists of an adjustable connecting pipe 5 installed at the top of the rotating tube 4, a diversion pipe 502 connected to the bottom of the connecting pipe 5, and a nozzle 503 installed at the output end of the diversion pipe 502. The input end of the connecting pipe 5 is connected to an external hot air supply mechanism. The diversion pipe 502 extends into the inner cavity of the rotating tube 4 and is distributed between the two sets of air inlets 401.

[0020] Furthermore, the rotating mechanism includes a housing 3 and a gear transmission assembly. The housing 3 is mounted on the cover plate 102 at the top of the storage hopper. The gear transmission assembly consists of a gear and a gear ring. The gear is driven to rotate by a servo motor in the housing 3, and the gear ring is fixedly mounted on the outer wall of the rotating tube 4, meshing with the gear. By starting the motor with the controller, the gear can be driven to rotate the gear ring, which in turn drives the rotating tube 4 to rotate and adjust along the cover plate 102 of the storage hopper.

[0021] Furthermore, the connecting pipe 5 is fixedly installed on the housing 3, and the rotating pipe 4 is rotatably connected to the connecting pipe 5 via a bearing. A sealing mechanism is provided at the connection between the connecting pipe 5 and the rotating pipe 4 to prevent hot air loss. The sealing mechanism is existing technology. When the rotating mechanism drives the rotating pipe 4 to rotate along the cover plate 102, the connecting pipe 5 is fixedly connected to the housing 3, so it will not interfere with the external hot air supply mechanism supplying hot air to the connecting pipe 5.

[0022] Furthermore, a third stirring blade 406 is provided at the bottom of the rotating tube 4. The third stirring blade 406 corresponds to the output end of the storage tank to prevent the raw material from clogging the output end. Multiple sets of the first stirring blade 402 and the second stirring blade 403 are provided. The first stirring blade 402 and the second stirring blade 403 are staggered along the height direction on both sides of the outer circumference of the rotating tube 4 to increase the stirring area and improve the stirring efficiency.

[0023] Furthermore, the preheating mechanism also includes mounting plates 501, with multiple sets of mounting plates 501 and multiple sets of distribution pipes 502. The distribution pipes 502 are fixedly connected to the mounting plates 501. The multiple distribution pipes 502 have different lengths, and the multiple sets of mounting plates 501 are evenly distributed along the height direction of the inner wall of the rotating pipe 4. The mounting plates 501 are rotatably connected to the inner wall of the rotating pipe 4 via bearings. A sealing mechanism is provided at the connection between the mounting plates 501 and the rotating pipe 4. Two sets of air inlets 401 are distributed between two adjacent sets of mounting plates 501, and nozzles 503 are distributed between two adjacent sets of mounting plates 501. When the rotating pipe 4 rotates along the top of the storage tank, the connecting pipe 5 remains stationary relative to the storage tank because it is limited by the casing 3. The mounting plates 501 are rotatably connected to the inner wall of the rotating pipe 4, while the distribution pipes 502 are fixedly connected to the mounting plates 501. Therefore, the rotation of the rotating pipe 4 will not interfere with the distribution pipes 502.

[0024] In this embodiment, the injection molding material is added through the feed valve 103 on the storage tank and then the feed valve 103 is closed. The injection molding cylinder assembly 2 is started by the controller for preheating. At the same time, the rotating mechanism is started by the controller to drive the rotating tube 4 to rotate along the top of the storage tank. The rotation direction of the rotating tube 4 is as follows: Figure 3The pointed end indicates the direction of rotation, which in turn rotates the pipe 4, driving multiple sets of first stirring blades 402, second stirring blades 403, and third stirring blades 406 to rotate. This fully stirs the raw materials in the storage tank, preventing clumping. Simultaneously, an external hot air supply mechanism is connected to the connecting pipe 5, which delivers hot air to the multiple distribution pipes 502. The nozzles 503 at the output end of the distribution pipes 502 output the hot air between two adjacent mounting plates 501. The hot air then enters the first stirring blades 402 and second stirring blades 403 on the left and right sides through the air inlets 401, and is then ejected from their respective outlets 404 to contact the raw materials in the storage tank. Preheating: As the stirring mechanism agitates, hot air can fully contact the raw material for preheating. Excess hot air is discharged from the exhaust port at the top of the storage tank. Since the exhaust port 404 is located on the side opposite to the rotation direction of the first stirring blade 402 or the second stirring blade 403, and a protective net 405 is provided on the exhaust port 404, the exhaust port 404 will not be easily blocked by the raw material. After preheating for a certain period of time, the electric valve is opened, and the stirring mechanism continues to agitate to assist the raw material in being smoothly discharged into the injection molding cylinder assembly 2 for heating and melting. The preheating time of the injection molding cylinder assembly 2 is used to simultaneously preheat the raw material, shortening the subsequent raw material heating time and improving injection molding efficiency.

[0025] Example 2

[0026] like Figure 1 and Figure 2 As shown, the fully automatic injection molding machine proposed in this utility model, compared with Embodiment 1, the storage tank is composed of a tank body 1, a sealing door 101 hinged to the side wall of the tank body 1, a cover plate 102 detachably installed on the top of the tank body 1, and a feed pipe 104 connected to the bottom of the tank body 1. The feed valve 103 of the storage tank is set on the cover plate 102. The output end of the feed pipe 104 is connected to the input end of the injection molding cylinder assembly 2. An electric valve is set on the feed pipe 104. The end of the sealing door 101 away from the hinge end is connected to the tank body 1 by a latch. The bottom of the tank body 1 is set in a funnel shape to facilitate material discharge. A high-temperature resistant sealing gasket is provided between the sealing door 101 and the tank body 1. The rotating mechanism and the rotating pipe 4 are both set on the cover plate 102. The lengths of multiple sets of first stirring blades 402 and multiple sets of second stirring blades 403 are adapted to the inner wall of the tank body 1.

[0027] In this embodiment, by disassembling the cover plate 102 from the barrel 1, the preheating mechanism and the stirring mechanism can be taken out for inspection and replacement, the sealing door 101 can be opened, and the protective net 405 on the stirring mechanism can be inspected and replaced, which provides convenience for use.

[0028] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A fully automatic injection molding machine characterized by comprising: include: The storage tank has an output end connected to a plastic injection cylinder assembly (2), and an electric valve is provided at the connection between the storage tank and the plastic injection cylinder assembly (2). The stirring mechanism consists of a rotating tube (4) rotatably connected to the top of the storage tank, a first stirring blade (402) installed on one side of the outer circumference of the rotating tube (4), and a second stirring blade (403) installed on the other side of the outer circumference of the rotating tube (4). The rotating tube (4) is driven to rotate by the rotating mechanism. An air inlet (401) is provided between the first stirring blade (402) and the rotating tube (4) and between the second stirring blade (403) and the rotating tube (4). Multiple sets of air outlets (404) are provided on the first stirring blade (402) and the second stirring blade (403). A protective net (405) is installed on the outside of the air outlet (404). The preheating mechanism consists of an adjustable connecting pipe (5) installed at the top of the rotating pipe (4), a diversion pipe (502) connected to the bottom of the connecting pipe (5), and a nozzle (503) installed at the output end of the diversion pipe (502). The input end of the connecting pipe (5) is connected to an external hot air supply mechanism. The diversion pipe (502) extends into the inner cavity of the rotating pipe (4) and is distributed between two sets of air inlets (401).

2. A fully automatic injection molding machine according to claim 1, wherein The storage hopper consists of a hopper body (1), a sealing door (101) hinged to the side wall of the hopper body (1), a cover plate (102) detachably installed on the top of the hopper body (1), and a feed pipe (104) connected to the bottom of the hopper body (1). The output end of the feed pipe (104) is connected to the input end of the injection molding cylinder assembly (2). The end of the sealing door (101) away from the hinge end is connected to the hopper body (1) by a latch.

3. A fully automatic injection molding machine according to claim 1, wherein The rotating mechanism includes: The casing (3) is installed on top of the storage tank; And a gear transmission assembly, which consists of a gear and a gear ring. The gear is driven to rotate by a servo motor in the housing (3). The gear ring is installed on the outer wall of the rotating tube (4) and meshes with the gear.

4. A fully automatic injection molding machine according to claim 3, wherein The connecting pipe (5) is installed on the chassis (3), and the rotating pipe (4) is rotatably connected to the connecting pipe (5) through the bearing.

5. The fully automatic injection molding machine according to claim 1, wherein Multiple sets of the first stirring blade (402) and the second stirring blade (403) are provided, and the first stirring blade (402) and the second stirring blade (403) are staggered along the height direction on both sides of the outer peripheral surface of the rotating tube (4).

6. A fully automatic injection molding machine according to claim 5, wherein The preheating mechanism also includes mounting plates (501), which are provided in multiple sets. There are also multiple sets of diversion pipes (502). The diversion pipes (502) are connected to the mounting plates (501). The multiple diversion pipes (502) have different lengths. The multiple sets of mounting plates (501) are evenly distributed along the height direction of the inner wall of the rotating pipe (4). The mounting plates (501) are rotatably connected to the inner wall of the rotating pipe (4) through bearings. There are two sets of air inlets (401) between two adjacent sets of mounting plates (501) and nozzles (503) are distributed between two adjacent sets of mounting plates (501).

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