Injection unit for a vertical injection molding machine with adaptive pressure control

Abstract

The utility model relates to injection molding machine technical field discloses a vertical injection molding machine injection device with self -adaptation pressure control, including the bottom plate, the inner wall fixedly connected with hot melt cylinder of bottom plate, the lower extreme of hot melt cylinder is provided with injection mechanism, the injection mechanism includes injection head and air cylinder, the inner wall rotationally connected with the shaft of injection head passes through bearing, the left -hand end fixedly connected with metal ball of the shaft, the ball body of metal ball is opened with the material hole, the right -hand end fixed with connecting rod of the shaft. The utility model carries out the detection to the injection pressure in hot melt cylinder through pressure sensor, and the connecting rod is rotated to push the air cylinder to drive, makes its connecting rod drive metal ball to rotate through the shaft, and further adjusts the injection flow through -bore diameter, thereby reaches to the self -adaptation adjustment to injection hydraulic pressure, avoids the problem that the injection pressure is too big or too small and is easy to produce the adverse effect to the injection of mould.

Description

Technical Field

[0001] This utility model relates to the field of injection molding machine technology, and in particular to an injection device for a vertical injection molding machine with adaptive pressure control. Background Technology

[0002] A vertical injection molding machine is a mechanical device. It typically consists of an injection system, a mold clamping system, a hydraulic transmission system, an electrical control system, a lubrication system, a heating and cooling system, and a safety monitoring system. The injection system is one of the most important components of an injection molding machine, and there are generally three main types: plunger type, screw type, and screw pre-plasticizing plunger injection type. The screw type is the most widely used. Its function is to heat and plasticize a certain amount of plastic within a specified time during one cycle of the injection molding machine, and then inject the molten plastic into the mold cavity through the screw under certain pressure and speed.

[0003] The existing vertical injection molding machine uses an injection unit that moves forward, bringing the nozzle close to the mold. A hydraulic system drives the screw to inject molten plastic into the mold cavity at high pressure and speed. Injection pressure and speed are key parameters. After injection, the screw continues to apply pressure to compensate for shrinkage during the plastic cooling process, ensuring dimensional stability of the product.

[0004] However, although the above-mentioned technology achieves injection pressure control by using a screw drive, the driving pressure is not easy to control. This can lead to excessive or insufficient injection pressure, which can have adverse effects on the injection of the mold. Therefore, a vertical injection molding machine injection device with adaptive pressure control is proposed to solve the above problems. Summary of the Invention

[0005] To overcome the above shortcomings, this utility model provides a vertical injection molding machine injection device with adaptive pressure control, which aims to solve the problem that the injection pressure of the existing vertical injection molding machine is inconvenient to control.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a vertical injection molding machine injection device with adaptive pressure control, comprising a base plate, wherein a hot melt cylinder is fixedly connected to the inner wall of the base plate, and an injection mechanism is provided at the lower end of the hot melt cylinder; The injection mechanism includes an injection head and a cylinder. The inner wall of the injection head is rotatably connected to a rotating shaft via a bearing. A metal ball is fixedly connected to the left end of the rotating shaft. The metal ball has a material hole. A connecting rod is fixed to the right end of the rotating shaft. The upper end of the connecting rod is hinged to the telescopic end of the cylinder via a pin. A hinge seat is hinged to the upper end of the cylinder via a pin.

[0007] As a further description of the above technical solution: the top wall of the hinge seat is fixedly connected to the bottom of the base plate, the left end of the metal ball is rotatably connected to the inner wall of the injection head through a bearing, and a pressure sensor is fixedly connected to the inner wall of the hot melt cylinder.

[0008] As a further description of the above technical solution: a fixing post is fixedly connected to the side wall of the injection head, and a scale is fixedly connected to the right end of the fixing post. A sliding groove is opened on the side wall of the scale.

[0009] As a further description of the above technical solution: a sliding column is slidably connected to the inner wall of the sliding port, the left end of the sliding column is fixedly connected to the right wall of the connecting rod, and an indicator block is fixedly connected to the outer wall of the sliding column.

[0010] As a further description of the above technical solution: a hydraulic cylinder is fixedly connected to the upper surface of the base plate, a top plate is fixedly connected to the telescopic end of the hydraulic cylinder, and a motor is fixedly connected to the upper surface of the top plate.

[0011] As a further description of the above technical solution: a screw is fixedly connected to the output end of the motor, a guide cylinder is fixedly connected to the upper surface of the base plate, and a guide post is inserted into the inner wall of the guide cylinder.

[0012] As a further description of the above technical solution: the upper end of the guide post is fixedly connected to the bottom of the top plate, and the outer wall of the hot melt cylinder is provided with a feed port.

[0013] As a further description of the above technical solution: a disassembly assembly is provided between the hot melt cylinder and the injection head. The disassembly assembly includes a connecting ring, which is fixedly connected to the lower end of the hot melt cylinder. The inner wall of the connecting ring is provided with an internal thread, and the outer wall of the upper end of the injection head is provided with an external thread. The upper end of the injection head is threadedly connected to the inner wall of the connecting ring.

[0014] This utility model has the following beneficial effects: 1. In this utility model, the injection pressure inside the hot melt cylinder is detected by a pressure sensor, and the cylinder is activated to drive the connecting rod to rotate. The connecting rod drives the metal ball to rotate through the rotating shaft, thereby adjusting the injection flow orifice diameter. This achieves adaptive adjustment of the injection liquid pressure, avoiding the problem that excessive or insufficient injection pressure can easily have adverse effects on the injection molding of the mold.

[0015] 2. In this utility model, the disassembly and assembly components make it easy for workers to remove the injection head from the hot melt cylinder, which facilitates the maintenance of the metal ball inside the injection head, thereby ensuring the accuracy of pressure regulation. Attached Figure Description

[0016] Figure 1This is a front view of a vertical injection molding machine injection device with adaptive pressure control proposed in this utility model. Figure 2 This is a schematic diagram of the base plate structure of a vertical injection molding machine injection device with adaptive pressure control proposed in this utility model. Figure 3 This is a schematic diagram of the cross-sectional structure of the injection head of a vertical injection molding machine injection device with adaptive pressure control proposed in this utility model. Figure 4 This is a schematic diagram of the metal ball structure of a vertical injection molding machine injection device with adaptive pressure control proposed in this utility model. Figure 5 This is a schematic diagram of the dial structure of an injection device for a vertical injection molding machine with adaptive pressure control, as proposed in this utility model.

[0017] Legend: 1. Base plate; 2. Injection mechanism; 201. Injection head; 202. Cylinder; 203. Connecting rod; 204. Rotating shaft; 205. Metal ball; 206. Material hole; 207. Fixed column; 208. Dial; 209. Sliding column; 210. Indicator block; 211. Sliding port; 212. Hinge seat; 3. Assembly / disassembly assembly; 301. Connecting ring; 302. Internal thread; 303. External thread; 4. Hot melt cylinder; 5. Pressure sensor; 6. Hydraulic cylinder; 7. Top plate; 8. Motor; 9. Screw; 10. Guide cylinder; 11. Guide column; 12. Feed port. Detailed Implementation

[0018] 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.

[0019] Reference Figure 1 - Figure 3 An embodiment of this utility model is provided: a vertical injection molding machine injection device with adaptive pressure control, including a base plate 1, a hot melt cylinder 4 fixedly connected to the inner wall of the base plate 1, the hot melt cylinder 4 can heat and melt the raw material, and an injection mechanism 2 is provided at the lower end of the hot melt cylinder 4. The injection mechanism 2 includes an injection head 201 and a cylinder 202. The inner wall of the injection head 201 is rotatably connected to a rotating shaft 204 via a bearing. A metal ball 205 is fixedly connected to the left end of the rotating shaft 204. The metal ball 205 has a material hole 206. The material hole 206 facilitates the injection of hot melt raw materials through the metal ball 205. Changing the position of the material hole 206 can control the size of the injection flow orifice. A connecting rod 203 is fixed to the right end of the rotating shaft 204. The rotating shaft 204 allows the connecting rod 203 to drive the metal ball 205 to rotate. The upper end of the connecting rod 203 is hinged to the telescopic end of the cylinder 202 via a pin. The upper end of the cylinder 202 is hinged to a hinge seat 212 via a pin. The cylinder 202 can be used to control the rotation position of the metal ball 205.

[0020] Reference Figure 2 - Figure 3 The top wall of the hinge seat 212 is fixedly connected to the bottom of the base plate 1. The left end of the metal ball 205 is rotatably connected to the inner wall of the injection head 201 through a bearing. The inner wall of the hot melt cylinder 4 is fixedly connected to a pressure sensor 5. The pressure inside the hot melt cylinder 4 can be monitored in real time by setting the pressure sensor 5.

[0021] Reference Figure 3 , Figure 5 A fixed post 207 is fixedly connected to the side wall of the injection head 201. A dial 208 is fixedly connected to the right end of the fixed post 207. A sliding opening 211 is provided on the side wall of the dial 208. The dial 208 allows the operator to easily understand the degree of rotation of the metal ball 205, thereby knowing the injection pressure adjustment inside the hot melt cylinder 4. A sliding column 209 is slidably connected to the inner wall of the sliding opening 211. The left end of the sliding column 209 is fixedly connected to the right wall of the connecting rod 203. An indicator block 210 is fixedly connected to the outer wall of the sliding column 209. The sliding opening 211 and the sliding column 209 can limit and guide the connecting rod 203, making the connecting rod 203 more stable during movement.

[0022] Reference Figure 1 - Figure 2A hydraulic cylinder 6 is fixedly connected to the upper surface of the base plate 1. The telescopic end of the hydraulic cylinder 6 is fixedly connected to the top plate 7. Starting the hydraulic cylinder 6 can drive the top plate 7 to move downward, so that its screw 9 pushes the hot melt material inside the hot melt cylinder 4 downward. A motor 8 is fixedly connected to the upper surface of the top plate 7. The output end of the motor 8 is fixedly connected to the screw 9. Starting the motor 8 can drive the screw 9 to rotate, thereby stirring and conveying the hot melt material. A guide cylinder 10 is fixedly connected to the upper surface of the base plate 1. A guide post 11 is inserted into the inner wall of the guide cylinder 10. The upper end of the guide post 11 is fixedly connected to the bottom of the top plate 7. The guide cylinder 10 and the guide post 11 can limit and guide the top plate 7. The outer wall of the hot melt cylinder 4 is provided with a feed port 12. The feed port 12 can connect the hot melt cylinder 4 to the hopper.

[0023] Reference Figure 2 - Figure 3 A disassembly assembly 3 is provided between the hot melt cylinder 4 and the injection head 201. The disassembly assembly 3 includes a connecting ring 301, which is fixedly connected to the lower end of the hot melt cylinder 4. The inner wall of the connecting ring 301 is provided with an internal thread 302, and the outer wall of the upper end of the injection head 201 is provided with an external thread 303. The upper end of the injection head 201 is threadedly connected to the inner wall of the connecting ring 301. By using a threaded connection between the hot melt cylinder 4 and the injection head 201, it is easy for the operator to remove the injection head 201 from the hot melt cylinder 4, which facilitates the maintenance of the metal ball 205 inside the injection head 201.

[0024] Working principle: The injection pressure inside the hot melt cylinder 4 is detected by the pressure sensor 5, and the cylinder 202 is activated by the controller to drive the connecting rod 203 to rotate. The connecting rod 203 drives the metal ball 205 to rotate through the rotating shaft 204, which adjusts the orientation of the feeding hole 206 of the metal ball 205, thereby adjusting the injection flow orifice diameter. This achieves adaptive adjustment of the injection liquid pressure, avoiding the problem of excessive or insufficient injection pressure that can adversely affect the injection molding process. During the rotation of the connecting rod 203, its sliding column 209 slides along the inner wall of the slide 211, thereby changing the position of the indicator block 210. The operator can understand the adjustment status of the injection flow orifice diameter by observing the scale position of the indicator block 210 on the dial 208. The disassembly and assembly component 3 connects the injection head 201 to the hot melt cylinder 4 by thread, which makes it easy for the operator to remove the injection head 201 from the hot melt cylinder 4, facilitating the maintenance of the metal ball 205 inside the injection head 201, thus ensuring the accuracy of pressure adjustment.

[0025] It is worth noting that in this embodiment, the controller (not shown in the figure) is a programmable logic controller (PLC), and the electrical equipment is a common device in the prior art. The model and other aspects can be customized according to actual usage requirements. The power supply interface of the electrical equipment in this utility model is connected to the power supply system through a switch (not shown in the figure) and wires (not shown in the figure) to realize its control. The circuits and control involved are all prior art and are known in the current field. They will not be described in detail here.

[0026] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A vertical injection molding machine injection unit with adaptive pressure control, comprising a base plate (1), characterized in that: A hot melt cylinder (4) is fixedly connected to the inner wall of the base plate (1), and an injection mechanism (2) is provided at the lower end of the hot melt cylinder (4). The injection mechanism (2) includes an injection head (201) and a cylinder (202). The inner wall of the injection head (201) is rotatably connected to a rotating shaft (204) via a bearing. A metal ball (205) is fixedly connected to the left end of the rotating shaft (204). The ball (205) has a material hole (206) in its body. A connecting rod (203) is fixed to the right end of the rotating shaft (204). The upper end of the connecting rod (203) is hinged to the telescopic end of the cylinder (202) via a pin. The upper end of the cylinder (202) is hinged to a hinge seat (212) via a pin.

2. The vertical injection molding machine injection device with adaptive pressure control according to claim 1, characterized in that: The top wall of the hinge seat (212) is fixedly connected to the bottom of the base plate (1), the left end of the metal ball (205) is rotatably connected to the inner wall of the injection head (201) through a bearing, and a pressure sensor (5) is fixedly connected to the inner wall of the hot melt cylinder (4).

3. The vertical injection molding machine injection device with adaptive pressure control according to claim 1, characterized in that: The side wall of the injection head (201) is fixedly connected to a fixing post (207), and the right end of the fixing post (207) is fixedly connected to a dial (208). The side wall of the dial (208) is provided with a sliding opening (211).

4. The vertical injection molding machine injection device with adaptive pressure control according to claim 3, characterized in that: The inner wall of the sliding opening (211) is slidably connected to a sliding column (209), the left end of the sliding column (209) is fixedly connected to the right wall of the connecting rod (203), and the outer wall of the sliding column (209) is fixedly connected to an indicator block (210).

5. The vertical injection molding machine injection device with adaptive pressure control according to claim 1, characterized in that: A hydraulic cylinder (6) is fixedly connected to the upper surface of the base plate (1), and a top plate (7) is fixedly connected to the telescopic end of the hydraulic cylinder (6). A motor (8) is fixedly connected to the upper surface of the top plate (7).

6. The vertical injection molding machine injection device with adaptive pressure control according to claim 5, characterized in that: The output end of the motor (8) is fixedly connected to a screw (9), and the upper surface of the base plate (1) is fixedly connected to a guide cylinder (10), with a guide post (11) inserted into the inner wall of the guide cylinder (10).

7. The vertical injection molding machine injection device with adaptive pressure control according to claim 6, characterized in that: The upper end of the guide post (11) is fixedly connected to the bottom of the top plate (7), and the outer wall of the hot melt cylinder (4) is provided with a feed inlet (12).

8. The vertical injection molding machine injection device with adaptive pressure control according to claim 1, characterized in that: A disassembly assembly (3) is provided between the hot melt cylinder (4) and the injection head (201). The disassembly assembly (3) includes a connecting ring (301), which is fixedly connected to the lower end of the hot melt cylinder (4). The inner wall of the connecting ring (301) is provided with an internal thread (302), and the outer wall of the upper end of the injection head (201) is provided with an external thread (303). The upper end of the injection head (201) is threadedly connected to the inner wall of the connecting ring (301).

Images