A feeding device for injection molding of household appliances

Abstract

This utility model relates to a feeding device for injection molding of household appliances, including a base plate and a plasticizing injection unit with a feeding port, which is fixedly installed on the base plate by a bracket. A feeding hopper is fixedly connected to the upper end of the feeding port. A feeding mechanism is provided on the upper side of the base plate. The feeding mechanism includes a vertical plate fixedly connected to the upper end of the base plate, a horizontal plate fixedly connected to the upper end of the vertical plate, a lead screw rotatably connected to the lower end of the horizontal plate, a lifting block threadedly connected to the outer wall of the lead screw, and a support plate fixedly connected to the left end of the lifting block. A drive motor drives the rotating shaft and spiral blades inside the conveying cylinder to rotate, which spirally lifts the particles at the bottom of the storage cylinder along the inner wall of the conveying cylinder, and drops them into the feeding hopper through the material pipe and the vertical pipe, and finally into the material cylinder of the plasticizing injection unit. This eliminates the need for manual lifting of the material barrel or operation with the help of a ladder, significantly reducing the intensity of manual labor, effectively avoiding the waste caused by the raw materials spilling outside the feeding port during the feeding process, and maintaining a clean and orderly production environment.

Description

Technical Field

[0001] This utility model relates to the field of injection molding technology for home appliances, and specifically discloses a feeding device for injection molding of home appliances. Background Technology

[0002] With the rapid development of the home appliance industry, higher requirements have been placed on the molding precision, production efficiency, and surface quality of the outer shells and internal structural components of various home appliances (such as refrigerators, air conditioners, and washing machines). Injection molding, due to its advantages such as high production efficiency, stable dimensional accuracy, and the ability to mold complex structural parts, has become one of the core technologies in home appliance component manufacturing. Through injection molding, not only can the efficient utilization of plastic raw materials be achieved, but also parts with smooth appearance and excellent mechanical properties can be mass-produced, significantly improving the standardization level and market competitiveness of home appliance products.

[0003] However, significant technical bottlenecks remain in the material supply stage of existing home appliance injection molding production lines. Currently, most small and medium-sized injection molding equipment still uses manual feeding, where plastic granules are manually transported from the material bin to the feeding hopper of the plasticizing injection unit. Because the nozzle of the plasticizing injection unit needs to match the mold height, the feeding port is usually located high off the ground. Manual feeding requires frequent lifting of the material bin or the use of ladders, resulting in high labor intensity. Furthermore, it is difficult to precisely control the feeding speed and direction when manually pouring materials, easily causing some material to spill outside the feeding port, resulting in material waste and potential pollution of the production environment.

[0004] Therefore, a material feeding device for injection molding of household appliances is needed to solve the above problems. Utility Model Content

[0005] This utility model proposes a feeding device for injection molding of household appliances, which accurately delivers materials to the feed inlet of the plasticizing injection unit through automation, eliminating the need for manual lifting of the material bucket or operation with the aid of ladders, thus significantly reducing the intensity of manual labor. At the same time, the closed conveying structure effectively prevents materials from spilling outside the feed inlet during the feeding process, which not only avoids material waste but also maintains a clean and orderly production environment.

[0006] This utility model is implemented as follows: a feeding device for injection molding of household appliances includes a base plate and a plasticizing injection unit fixedly installed on the base plate by a bracket and having a feeding port. The upper end of the feeding port is fixedly connected to a feeding hopper, and a feeding mechanism is provided on the upper side of the base plate.

[0007] The feeding mechanism includes a vertical plate fixedly connected to the upper part of the base plate, a horizontal plate fixedly connected to the upper end of the vertical plate, a lead screw rotatably connected to the lower end of the horizontal plate, a lifting block threadedly connected to the outer wall of the lead screw, a support plate fixedly connected to the left end of the lifting block, a storage cylinder placed on the upper end of the support plate, a conveying cylinder with an open lower side arranged directly above the storage cylinder, a rotating shaft rotatably connected to the top of the inner wall of the conveying cylinder, a spiral blade on the outer wall of the rotating shaft, a drive motor with its output end fixedly connected to the rotating shaft installed at the upper end of the conveying cylinder, a material pipe connected to the left side of the outer wall of the conveying cylinder, and a vertical pipe extending into the inside of the feeding hopper at the other end of the material pipe;

[0008] A drive mechanism is provided on the upper side of the lead screw.

[0009] As a preferred embodiment of the feeding device for injection molding of household appliances according to this utility model, the driving mechanism includes a driving frame fixedly connected to the upper end of the horizontal plate, a worm gear rotatably connected inside the driving frame, a worm wheel meshing with the outer wall of the worm gear, a transmission shaft fixedly connected between the worm wheel and the lead screw, and a servo motor whose output end is fixedly connected to the worm gear is installed on the outer wall of the driving frame.

[0010] As a preferred embodiment of the feeding device for injection molding of household appliances according to this utility model, the lower end of the horizontal plate is fixedly connected to two guide rods that pass through the lifting block and are slidably connected to the lifting block.

[0011] As a preferred embodiment of the feeding device for injection molding of household appliances according to this utility model, the upper end of the support plate is fixedly connected with a positioning ring that fits against the outer wall of the storage cylinder.

[0012] As a preferred embodiment of the feeding device for injection molding of household appliances according to this utility model, the material tube is inclined.

[0013] As a preferred embodiment of the feeding device for injection molding of household appliances according to this utility model, the lead screw is rotatably connected to the upper end of the base plate, and the two guide rods are fixedly connected to the upper end of the base plate.

[0014] As a preferred embodiment of the feeding device for injection molding of household appliances according to this utility model, a fixing plate is fixedly connected between the drive frame and the conveying cylinder, and a reinforcing rod is fixedly connected between the conveying cylinder and the material tube.

[0015] The beneficial effects of this utility model are:

[0016] 1. Initially, the support plate is positioned low to facilitate the placement of the storage cylinder filled with plastic granules. During feeding, the drive mechanism drives the lead screw to rotate, causing the lifting block and support plate to rise, raising the storage cylinder to the set height. The conveyor cylinder then inserts into the storage cylinder. Subsequently, the drive motor drives the rotating shaft and spiral blades inside the conveyor cylinder to rotate, spirally lifting the granules at the bottom of the storage cylinder along the inner wall of the conveyor cylinder. The granules then fall into the feeding hopper through the feed pipe and vertical pipe, and finally enter the cylinder of the plasticizing injection unit. This eliminates the need for manual lifting of the storage cylinder or operation with the aid of ladders, significantly reducing the intensity of manual labor.

[0017] 2. The feeding process uses a closed conveying structure that inserts the conveyor cylinder into the storage cylinder and near its bottom to ensure that the plastic granules are conveyed in the pipeline until they enter the feeding hopper. This effectively avoids the waste caused by the raw materials spilling outside the feed inlet during the feeding process and keeps the production environment clean and orderly. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0019] Figure 1 This is a front sectional view of the overall material feeding device for injection molding of household appliances according to this utility model;

[0020] Figure 2 For the present utility model Figure 1 Enlarged view of point A in the middle;

[0021] Figure 3 This is a partial structural diagram of the present invention;

[0022] Figure 4 This is a partial structural diagram of the present invention.

[0023] The markings in the diagram are: 1. Base plate; 2. Plasticizing injection unit; 3. Feed inlet; 4. Feed hopper; 5. Vertical plate; 6. Horizontal plate; 7. Lead screw; 8. Lifting block; 9. Support plate; 10. Positioning ring; 11. Storage cylinder; 12. Conveying cylinder; 13. Rotating shaft; 14. Spiral blade; 15. Material tube; 16. Vertical tube; 17. Drive motor; 18. Drive frame; 19. Worm gear; 20. Worm wheel; 21. Servo motor; 22. Fixing plate; 23. Reinforcing rod; 24. Guide rod. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0025] Please see Figure 1-4 A feeding device for injection molding of household appliances includes a base plate 1 and a plasticizing injection unit 2 fixedly installed on the base plate 1 by a bracket and having a feeding port 3. A feeding hopper 4 is fixedly connected to the upper end of the feeding port 3, and a feeding mechanism is provided on the upper side of the base plate 1.

[0026] The feeding mechanism includes a vertical plate 5 fixedly connected to the upper end of the base plate 1, a horizontal plate 6 fixedly connected to the upper end of the vertical plate 5, a lead screw 7 rotatably connected to the lower end of the horizontal plate 6, a lifting block 8 threadedly connected to the outer wall of the lead screw 7, a support plate 9 fixedly connected to the left end of the lifting block 8, a storage cylinder 11 placed on the upper end of the support plate 9, a conveying cylinder 12 with an open lower side set directly above the storage cylinder 11, a rotating shaft 13 rotatably connected to the top of the inner wall of the conveying cylinder 12, a spiral blade 14 on the outer wall of the rotating shaft 13, a drive motor 17 with its output end fixedly connected to the rotating shaft 13 installed at the upper end of the conveying cylinder 12, a material pipe 15 connected to the left side of the outer wall of the conveying cylinder 12, and a vertical pipe 16 extending into the inside of the feeding hopper 4 connected to the other end of the material pipe 15.

[0027] A drive mechanism is provided on the upper side of the lead screw 7.

[0028] In this embodiment: In the initial state, the support plate 9 is positioned close to the bottom plate 1, and the storage cylinder 11 containing plastic particles is positioned on the upper end of the support plate 9, so that the storage cylinder 11 is placed at a lower position, avoiding lifting the storage cylinder 11.

[0029] When material needs to be supplied, the drive mechanism drives the lead screw 7 to rotate, thereby driving the lifting block 8 to slide upward along the axis of the lead screw 7. The lifting block 8 drives the support plate 9 on the left and the storage cylinder 11 to rise synchronously. When the lifting block 8 rises to the set position, the opening structure at the lower end of the conveying cylinder 12 is inserted into the storage cylinder 11, and the lower edge is close to the bottom side of the inner wall of the storage cylinder 11.

[0030] Subsequently, the output shaft of the drive motor 17 drives the rotating shaft 13 to rotate, and drives the spiral blade 14 to rotate at a set speed. The lower end of the spiral blade 14 is immersed in the plastic granules in the storage cylinder 11. The granules spiral up along the inner wall of the conveying cylinder 12. After reaching the top of the conveying cylinder 12, the material passage pipe 15 and the vertical pipe 16 extend into the inside of the feeding hopper 4. The granules fall into the feeding hopper 4 through the vertical pipe 16, and then enter the material cylinder of the plasticizing injection unit 2 through the inlet 3 at the lower end of the feeding hopper 4, thus completing the feeding process. Therefore, there is no need for manual lifting of the material barrel or operation with the help of a ladder, which significantly reduces the intensity of manual labor.

[0031] During the overall feeding process, the closed conveyor structure effectively prevents materials from spilling onto the outside of the feed inlet 3 during the feeding process, which not only avoids raw material waste but also keeps the production environment clean and orderly.

[0032] When the plastic granules in the storage cylinder 11 are nearly emptied, the servo motor 21 rotates in the opposite direction, driving the lead screw 7 to reverse, the lifting block 8 slides down along the guide rod 24, and the support plate 9 and the storage cylinder 11 simultaneously descend to the initial low position, and the empty storage cylinder 11 is manually removed.

[0033] The plasticizing injection unit 2 is a mature existing technology in the field of injection molding. Its core function is to heat and melt plastic granules and inject them into the mold cavity. The plasticizing injection unit 2 mainly consists of a barrel, screw, nozzle, heating system, motor, and injection cylinder. The upper end of the barrel has a feed port 3 for receiving plastic granules. During operation, the granules fall into the barrel through the feed port 3. The screw rotates under the drive of the motor, conveying, compressing, and shearing the material. At the same time, the heating ring around the barrel heats the material, melting it into a uniform melt. When the melt reaches the set plasticizing state, the injection cylinder pushes the screw forward, injecting the melt into the mold cavity at high pressure and high speed through the nozzle, completing the injection process. Since the specific structure and working principle of the plasticizing injection unit 2 are widely used in existing injection molding equipment and are conventional technologies well known to those skilled in the art, its internal details are not shown in detail in the attached drawings.

[0034] As a technical optimization of this utility model, the driving mechanism includes a driving frame 18 fixedly connected to the upper end of the horizontal plate 6. A worm gear 19 is rotatably connected inside the driving frame 18. A worm wheel 20 is meshed with the outer wall of the worm gear 19. A transmission shaft is fixedly connected between the worm wheel 20 and the lead screw 7. A servo motor 21 with its output end fixedly connected to the worm gear 19 is installed on the outer wall of the driving frame 18.

[0035] In this embodiment: the servo motor 21 drives the worm gear 19 to rotate, the worm gear 19 meshes with the worm wheel 20 for transmission, and the worm wheel 20 drives the lead screw 7 to rotate through the transmission shaft. The transmission of the worm gear 19 and the worm wheel 20 has the function of speed reduction and torque increase, and also has a self-locking function to ensure that the lifting block 8 can stay stably at any position.

[0036] As a technical optimization of this utility model, the lower end of the horizontal plate 6 is fixedly connected with two guide rods 24 that pass through the lifting block 8 and are slidably connected to the lifting block 8.

[0037] In this embodiment: the guide rod 24 provides a rigid vertical guide for the lifting block 8, ensuring that the lifting block 8 moves vertically along the axis of the lead screw 7, and avoiding the shaking of the lifting block 8 caused by the radial force generated by the rotation of the lead screw 7.

[0038] As a technical optimization of this utility model, the upper end of the support plate 9 is fixedly connected with a positioning ring 10 that fits against the outer wall of the storage cylinder 11.

[0039] In this embodiment: by setting the positioning ring 10, the horizontal movement of the storage cylinder 11 is prevented, and the placement position of the storage cylinder 11 is positioned.

[0040] As a technical optimization of this utility model, the material tube 15 is inclined.

[0041] In this embodiment: one end of the material pipe 15 is connected to the upper part of the conveying cylinder 12, and the other end is connected to the vertical pipe 16. Its inclined angle design allows the material to slide down the pipe wall under the action of gravity, accelerating the material flow.

[0042] As a technical optimization of this utility model, the lead screw 7 is rotatably connected to the upper end of the base plate 1, and the two guide rods 24 are fixedly connected to the upper end of the base plate 1.

[0043] In this embodiment: the lower end of the lead screw 7 is rotatably connected to the base plate 1, and the upper end is rotatably connected to the horizontal plate 6, forming a stable structure supported at both ends; the lower end of the guide rod 24 is fixed to the base plate 1, and the upper end is fixed to the horizontal plate 6, thereby improving the stability of the guide rod 24.

[0044] As a technical optimization of this utility model, a fixing plate 22 is fixedly connected between the drive frame 18 and the conveying cylinder 12, and a reinforcing rod 23 is fixedly connected between the conveying cylinder 12 and the material pipe 15.

[0045] In this embodiment: the fixing plate 22 rigidly connects the drive frame 18 and the conveying cylinder 12, and supports and fixes the conveying cylinder 12; the reinforcing rod 23 connects the conveying cylinder 12 and the material pipe 15, and enhances the stability of the connection between the conveying cylinder 12 and the material pipe 15.

[0046] The working principle and usage process of this utility model are as follows: In the initial state, the support plate 9 is positioned close to the bottom plate 1. The storage cylinder 11 containing plastic granules is placed on the upper end of the support plate 9. The positioning ring 10 on the support plate 9 is attached to the outer wall of the storage cylinder 11 to position the storage cylinder 11 and prevent the storage cylinder 11 from moving horizontally. This ensures that the storage cylinder 11 is placed at a lower position and avoids lifting the storage cylinder 11.

[0047] When feeding is required, the servo motor 21 starts, and its output shaft drives the worm 19 in the drive frame 18 to rotate. The worm 19 meshes with the worm wheel 20 for transmission. The worm wheel 20 drives the lead screw 7 to rotate through the transmission shaft, causing the lifting block 8 to slide upward along the axis of the lead screw 7 under the constraint of the guide rod 24. The lifting block 8 drives the support plate 9 on the left and the storage cylinder 11 to rise synchronously. When the lifting block 8 rises to the set position, the opening structure at the lower end of the conveying cylinder 12 is inserted into the storage cylinder 11, and the lower edge is close to the bottom side of the inner wall of the storage cylinder 11.

[0048] Subsequently, the output shaft of the drive motor 17 drives the rotating shaft 13 to rotate, and drives the spiral blade 14 to rotate at a set speed. The lower end of the spiral blade 14 is immersed in the plastic granules in the storage cylinder 11. The granules spiral up along the inner wall of the conveying cylinder 12. After reaching the top of the conveying cylinder 12, the material passage pipe 15 and the vertical pipe 16 extend into the inside of the feeding hopper 4. The granules fall into the feeding hopper 4 through the vertical pipe 16, and then enter the material cylinder of the plasticizing injection unit 2 through the inlet 3 at the lower end of the feeding hopper 4, thus completing the feeding process. Therefore, there is no need for manual lifting of the material barrel or operation with the help of a ladder, which significantly reduces the intensity of manual labor.

[0049] During the overall feeding process, the closed conveyor structure effectively prevents materials from spilling onto the outside of the feed inlet 3 during the feeding process, which not only avoids raw material waste but also keeps the production environment clean and orderly.

[0050] When the plastic granules in the storage cylinder 11 are nearly emptied, the servo motor 21 rotates in the opposite direction, driving the lead screw 7 to reverse, the lifting block 8 slides down along the guide rod 24, and the support plate 9 and the storage cylinder 11 simultaneously descend to the initial low position, and the empty storage cylinder 11 is manually removed.

[0051] The plasticizing injection unit 2 is a mature existing technology in the field of injection molding. Its core function is to heat and melt plastic granules and inject them into the mold cavity. The plasticizing injection unit 2 mainly consists of a barrel, screw, nozzle, heating system, motor, and injection cylinder. The upper end of the barrel has a feed port 3 for receiving plastic granules. During operation, the granules fall into the barrel through the feed port 3. The screw rotates under the drive of the motor, conveying, compressing, and shearing the material. At the same time, the heating ring around the barrel heats the material, melting it into a uniform melt. When the melt reaches the set plasticizing state, the injection cylinder pushes the screw forward, injecting the melt into the mold cavity at high pressure and high speed through the nozzle, completing the injection process. Since the specific structure and working principle of the plasticizing injection unit 2 are widely used in existing injection molding equipment and are conventional technologies well known to those skilled in the art, its internal details are not shown in detail in the attached drawings.

[0052] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0053] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A feeding device for the injection moulding of household appliances, comprising a base plate (1) and a plasticising injection unit (2) fixed above the base plate (1) by means of a support and having a feed inlet (3), characterised in that: The upper end of the feed inlet (3) is fixedly connected to a feeding hopper (4), and a feeding mechanism is provided on the upper side of the bottom plate (1); The feeding mechanism includes a vertical plate (5) fixedly connected to the upper end of the base plate (1). A horizontal plate (6) is fixedly connected to the upper end of the vertical plate (5). A lead screw (7) is rotatably connected to the lower end of the horizontal plate (6). A lifting block (8) is threadedly connected to the outer wall of the lead screw (7). A support plate (9) is fixedly connected to the left end of the lifting block (8). A storage cylinder (11) is placed on the upper end of the support plate (9). An opening is provided directly above the storage cylinder (11) on the lower side. The conveying cylinder (12) has an inlet structure. The top of the inner wall of the conveying cylinder (12) is rotatably connected to a rotating shaft (13). The outer wall of the rotating shaft (13) is equipped with a spiral blade (14). The upper end of the conveying cylinder (12) is equipped with a drive motor (17) whose output end is fixedly connected to the rotating shaft (13). The left side of the outer wall of the conveying cylinder (12) is connected to a material pipe (15). The other end of the material pipe (15) is connected to a vertical pipe (16) extending into the inside of the feeding hopper (4). A drive mechanism is provided on the upper side of the lead screw (7).

2. The apparatus according to claim 1, wherein: The driving mechanism includes a driving frame (18) fixedly connected to the upper end of the horizontal plate (6). A worm gear (19) is rotatably connected inside the driving frame (18). A worm wheel (20) is meshed with the outer wall of the worm gear (19). A transmission shaft is fixedly connected between the worm wheel (20) and the lead screw (7). A servo motor (21) with its output end fixedly connected to the worm gear (19) is installed on the outer wall of the driving frame (18).

3. The feeding device for injection molding of household appliances according to claim 1, characterized in that: The lower end of the horizontal plate (6) is fixedly connected to two through lifting blocks (8) and guide rods (24) are slidably connected to the lifting blocks (8).

4. The apparatus according to claim 1, wherein: The upper end of the support plate (9) is fixedly connected to a positioning ring (10) that fits against the outer wall of the storage cylinder (11).

5. The apparatus according to claim 1, wherein: The feed tube (15) is inclined.

6. The apparatus according to claim 3, wherein: The lead screw (7) is rotatably connected to the upper end of the base plate (1), and the two guide rods (24) are fixedly connected to the upper end of the base plate (1).

7. The apparatus according to claim 2, wherein: the first and second supply channels are formed in the first and second supply members, respectively, and the first and second supply members are formed of a material having a higher thermal conductivity than the material of the first and second supply channels. A fixing plate (22) is fixedly connected between the drive frame (18) and the conveying cylinder (12), and a reinforcing rod (23) is fixedly connected between the conveying cylinder (12) and the material pipe (15).

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