Automatic feeding system of double-color injection molding machine

Abstract

The utility model relates to the technical field of feeding systems, in particular to an automatic feeding system of a double-color injection molding machine. According to the technical scheme, the feeding device comprises a bottom plate, a lifting table, a first motor, feeding pipes, a positioning seat and a mounting seat, the lifting table is arranged above the bottom plate, a fixing seat is arranged at the upper end of the lifting table, the first motor and the symmetrically-distributed feeding pipes are arranged at the upper end of the fixing seat, a charging barrel is mounted at the upper ends of the feeding pipes in a communicating mode, and the positioning seat is arranged on one sides of the feeding pipes; one end of the positioning seat is provided with a third motor, the output end of the third motor and the positioning seat are rotatably installed, the output end of the first motor is provided with a first screw, the outer wall of the first screw is sleeved with a first nut in a threaded mode, the upper end of the first nut is provided with a connecting plate, and the connecting plate is connected with the positioning seat through a connecting rod. According to the utility model, the positioning seat is in sliding butt joint with the feeding cylinder, and the positioning seat synchronously moves under the driving of the screw rod through the connecting plate, so that the feeding screw rod can be quickly moved out, and the inside of the feeding cylinder can be conveniently cleaned.

Description

Technical Field

[0001] This utility model relates to the field of feeding system technology, and in particular to an automatic feeding system for a two-color injection molding machine. Background Technology

[0002] Two-color injection molding refers to the process of molding two kinds of plastics into one piece in a single injection molding process. The most common form of two-color injection mold is that two identical moving molds correspond to two different fixed mold cavities. After the first injection of the base material, the mold is opened first. Then, the moving mold is rotated 180° using the rotatable structure of the injection molding machine. The mold is then closed and a second injection is performed using a material of a different color or a different material than the first injection.

[0003] Two-color injection molding involves simultaneously molding two types of plastics on a dedicated two-color injection molding machine. The two plastics are injected into the same machine in two separate molding processes, but the product only exits the mold once. Therefore, two-color injection molding is typically completed using a single mold and requires a specialized two-color injection molding machine. Throughout the entire process, the plastic remains in a molten state without cooling or shrinkage. This means that a strong chemical bond can form between the base material and the cover material, resulting in high strength and reducing the risk of burrs. Compared to insert molding, two-color injection molding eliminates the need for insert placement, leading to a shorter molding cycle, higher efficiency, and higher quality.

[0004] When adjustments are needed during the injection molding process or when blockages occur inside the feed tube, the accumulated material inside the feed tube needs to be cleaned. The cleaning process requires the injection molding machine to be shut down for a long time. After the equipment cools down, the injection tube needs to be disassembled and reassembled. The disassembly and reassembly of the equipment involves a large number of bolts, especially for two-color injection molding machines, which require disassembly and reassembly of two sets of feed tubes, which is tedious and time-consuming. Therefore, we propose an automatic feeding system for two-color injection molding machines to solve the existing problems. Utility Model Content

[0005] The purpose of this invention is to address the problems existing in the background technology by proposing an automatic feeding system for a two-color injection molding machine.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an automatic feeding system for a two-color injection molding machine, comprising a base plate, a lifting platform, a motor, a feeding pipe, a positioning seat, and a mounting seat. The lifting platform is positioned above the base plate, and a fixed seat is positioned at the upper end of the lifting platform. A motor and symmetrically distributed feeding pipes are positioned at the upper end of the fixed seat. A material cylinder is connected to the upper end of the feeding pipe. A positioning seat is positioned on one side of the feeding pipe. A motor is mounted at one end of the positioning seat, with its output end rotatably mounted to the positioning seat. A screw is positioned at the output end of the motor, and a nut is threaded onto the outer wall of the screw. A connecting plate is positioned at the upper end of the nut, and the connecting plate is connected to the positioning seat via a connecting rod.

[0007] Preferably, the bearing bracket provides stable support to the end of the screw, reduces radial runout when the screw rotates, ensures the linear accuracy of the nut's movement, avoids transmission jamming or increased wear due to screw misalignment, and extends the service life of the screw.

[0008] Preferably, a mounting base is provided at the lower end of the nut, and symmetrically distributed guide rails are provided at the upper end of the lifting platform. A slider is slidably mounted on the outer wall of the guide rails at the lower end of the mounting base. The sliding guide design of the guide rails and sliders restricts the nut to move only in a preset direction, preventing offset or twisting caused by uneven force on the screw. The slider is slidably mounted on the guide rails, providing lateral sliding guidance for the mounting base.

[0009] Preferably, the base plate has symmetrically distributed mounting slots inside, and the output end of the motor three is equipped with a feeding screw that is rotatably mounted inside the feeding cylinder. The motor three directly drives the feeding screw to rotate, and the continuous quantitative conveying of hot melt plastic is achieved through spiral conveying.

[0010] Preferably, a guide rod is provided at the upper end of the base plate, and a sliding sleeve is embedded inside the lifting platform and slidably fitted onto the outer wall of the guide rod. The rigid sliding support between the guide rod and the sliding sleeve enhances the stability of the longitudinal movement of the lifting platform and prevents shaking during lifting from causing misalignment between the injection molding machine and the mold.

[0011] Preferably, a second motor is provided at the upper end of the base plate, a second screw is provided at the upper end of the second motor, and a second nut, threadedly installed with the second screw, is embedded inside the lifting platform. A limit block is provided at the upper end of the second screw. The second motor drives the lifting platform to move longitudinally through the threaded transmission between the second screw and the second nut, realizing stepless adjustment of the injection molding machine height to meet the needs of different mold installation heights. The limit block prevents the second nut from overtraveling and ensures lifting safety.

[0012] Preferably, a collar is fitted onto the outer wall of the feed tube, and a sealing gasket is provided at one end of the collar. The sealing gasket forms a flexible seal between the collar and the feed tube, preventing leakage of high-temperature molten material or air infiltration, and avoiding injection molding bubble defects.

[0013] Preferably, a positioning sleeve arranged in a circular array is embedded inside the collar, and a positioning block arranged in a circular array and slidably installed inside the positioning sleeve is provided at one end of the positioning seat. The insertion and cooperation between the circular array positioning block and the positioning sleeve enables rapid alignment of the feeding tube and the positioning seat, and the multi-point evenly distributed positioning structure can disperse the locking stress.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. When the feeding tube of a two-color injection molding machine needs cleaning, the motor drives a pair of screws and pushes a pair of nuts, which are connected to the positioning seat through a connecting rod. At the same time, the two feeding screws are squeezed and pulled out, avoiding the disassembly and assembly of a large number of fixed parts. When the two-color injection molding machine needs to be adjusted during the processing or when there is a blockage inside the feeding tube, the feeding structure inside the feeding tube can be quickly moved out, which facilitates the cleaning of the inside of the feeding tube. The removal of the feeding screws is time-saving and convenient. Attached Figure Description

[0016] Figure 1 This is a side view of the three-dimensional structure of the present invention;

[0017] Figure 2 This is a top-view three-dimensional structural diagram of the present invention;

[0018] Figure 3 This is a side sectional three-dimensional structural schematic diagram of the present invention;

[0019] Figure 4 This is a side view of the three-dimensional structure of the collar of this utility model;

[0020] Figure 5 This is a top-view three-dimensional structural diagram of the feeding screw of this utility model.

[0021] Reference numerals in the attached diagram: 1. Base plate; 2. Lifting platform; 3. Motor 1; 4. Feeding pipe; 5. Motor 2; 6. Motor 3; 7. Material cylinder; 8. Connecting plate; 9. Fixed seat; 10. Guide rail; 11. Positioning seat; 12. Screw 2; 13. Collar; 14. Screw 1; 15. Bearing bracket; 16. Connecting rod; 17. Feeding screw; 18. Positioning sleeve; 19. Guide rod; 20. Sliding sleeve; 21. Positioning block; 22. Mounting groove; 23. Nut 1; 24. Sliding block; 25. Mounting seat; 26. Nut 2. Detailed Implementation

[0022] 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.

[0023] like Figures 1-5As shown, the automatic feeding system for a two-color injection molding machine proposed in this utility model includes a base plate 1, a lifting platform 2, a motor 3, a feeding pipe 4, a positioning seat 11, and a mounting seat 25. The lifting platform 2 is arranged above the base plate 1. A fixed seat 9 is arranged on the upper end of the lifting platform 2. The motor 3 and the symmetrically distributed feeding pipe 4 are arranged on the upper end of the fixed seat 9. A material cylinder 7 is connected to the upper end of the feeding pipe 4. A positioning seat 11 is arranged on one side of the feeding pipe 4. A motor 6 with an output end rotatably mounted on the positioning seat 11 is arranged at one end of the positioning seat 11. A screw 14 is arranged at the output end of the motor 3. A nut 23 is threadedly fitted on the outer wall of the screw 14. A connecting plate 8 is arranged on the upper end of the nut 23. The connecting plate 8 is connected to the positioning seat 11 through a connecting rod 16.

[0024] The upper end of the lifting platform 2 is provided with a bearing bracket 15, and one end of the screw 14 is rotatably installed inside the bearing bracket 15.

[0025] The lower end of nut 23 is provided with a mounting base 25, the upper end of the lifting platform 2 is provided with symmetrically distributed guide rails 10, and the lower end of the mounting base 25 is provided with a slider 24 that is slidably installed on the outer wall of the guide rails 10.

[0026] The base plate 1 has symmetrically distributed mounting slots 22 inside, and the output end of the motor 6 is provided with a feeding screw 17 that is rotatably installed inside the feeding cylinder 7.

[0027] A guide rod 19 is provided at the upper end of the base plate 1, and a sliding sleeve 20 is embedded inside the lifting platform 2 and is slidably sleeved on the outer wall of the guide rod 19.

[0028] A motor 2 5 is installed on the upper end of the base plate 1, and a screw 2 12 is installed on the upper end of the motor 2 5. A nut 26 that is threaded onto the screw 2 12 is embedded inside the lifting platform 2. A limit block is installed on the upper end of the screw 2 12.

[0029] A collar 13 is fitted onto the outer wall of the feeding pipe 4, and a sealing gasket is provided at one end of the collar 13.

[0030] The collar 13 has a positioning sleeve 18 arranged in a ring array embedded inside it, and the positioning seat 11 has a positioning block 21 arranged in a ring array and slidably installed inside the positioning sleeve 18 at one end.

[0031] The base plate 1 fixes the parts through the mounting groove 22 and installs the two-color injection molding machine in the designated position. When the second motor 5 is running, the second motor 5 drives the second screw 12 to rotate. The rotational force of the second screw 12 is applied to the second nut 26. The lifting platform 2 slides on the outer wall of the guide rod 19 through the sliding sleeve 20, which provides sliding support for the lifting platform 2. The second motor 5 drives the second screw 12 to push the second nut 26 to move longitudinally, which drives the lifting platform 2 to move longitudinally, and then drives the two-color injection molding machine to move longitudinally. When the two-color injection molding machine is assembled with the mold, the height can be adjusted, which improves the flexibility of the two-color injection molding machine during assembly.

[0032] After the two-color injection molding machine is assembled, the barrel 7 provides injection liquid material to the feeding pipe 4, and the motor 6 drives the feeding screw 17 to rotate, which feeds the hot melt plastic to provide liquid material to the two-color injection molding machine.

[0033] When the feeding pipe 4 of the two-color injection molding machine is blocked, the motor 3 drives the screw 14 to rotate, which in turn pushes the nut 23. The lower end of the nut 23 is connected to the mounting base 25. The mounting base 25 is slidably mounted on the outer wall of the guide rail 10 via the slider 24. The nut 23 is thus pushed. When the nut 23 moves, the connecting rod 16 is moved by the connecting plate 8, which in turn moves the positioning seat 11. When the positioning seat 11 moves, the positioning block 21 disengages from the positioning sleeve 18, and the positioning seat 11 is disengaged from the feeding pipe 4. This causes the feeding screw 17 to be pulled out of the feeding pipe 4, thus realizing the rapid removal of the feeding screw 17 from the feeding pipe 4 and facilitating the cleaning of the inside of the feeding pipe 4. The cleaning of the feeding pipe 4 avoids the disassembly and assembly of a large number of fixed parts, improving the ease of use.

[0034] The above specific embodiments are merely several preferred embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

[0035] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An automatic feeding system for a two-color injection molding machine, comprising a base plate (1), a lifting platform (2), a motor (3), a feeding pipe (4), a positioning seat (11), and a mounting seat (25), characterized in that: A lifting platform (2) is provided above the base plate (1). A fixed seat (9) is provided on the upper end of the lifting platform (2). A motor (3) and symmetrically distributed feeding pipes (4) are provided on the upper end of the fixed seat (9). A material cylinder (7) is connected to the upper end of the feeding pipe (4). A positioning seat (11) is provided on one side of the feeding pipe (4). A motor (6) with an output end rotatably mounted on the positioning seat (11) is provided on one end of the positioning seat (11). A screw (14) is provided on the output end of the motor (3). A nut (23) is threadedly installed on the outer wall of the screw (14). A connecting plate (8) is provided on the upper end of the nut (23). The connecting plate (8) is connected to the positioning seat (11) by a connecting rod (16).

2. The automatic feeding system for a two-color injection molding machine according to claim 1, characterized in that: The upper end of the lifting platform (2) is provided with a bearing bracket (15), and one end of the screw (14) is rotatably installed inside the bearing bracket (15).

3. The automatic feeding system for a two-color injection molding machine according to claim 1, characterized in that: The lower end of the nut (23) is provided with a mounting base (25), the upper end of the lifting platform (2) is provided with symmetrically distributed guide rails (10), and the lower end of the mounting base (25) is provided with a slider (24) that is slidably installed on the outer wall of the guide rail (10).

4. The automatic feeding system for a two-color injection molding machine according to claim 1, characterized in that: The base plate (1) has symmetrically distributed mounting slots (22) inside, and the output end of the motor (6) is provided with a feeding screw (17) that is rotatably installed inside the feeding cylinder (7).

5. The automatic feeding system for a two-color injection molding machine according to claim 1, characterized in that: The bottom plate (1) is provided with a guide rod (19) at the upper end, and the lifting platform (2) is embedded with a sliding sleeve (20) that is slidably sleeved on the outer wall of the guide rod (19).

6. The automatic feeding system for a two-color injection molding machine according to claim 1, characterized in that: The base plate (1) is provided with a motor (5) at the upper end, and a screw (12) is provided at the upper end of the motor (5). A nut (26) that is threaded onto the screw (12) is embedded inside the lifting platform (2). A limit block is provided at the upper end of the screw (12).

7. The automatic feeding system for a two-color injection molding machine according to claim 1, characterized in that: The outer wall of the feeding pipe (4) is fitted with a collar (13), and a sealing gasket is provided at one end of the collar (13).

8. The automatic feeding system for a two-color injection molding machine according to claim 7, characterized in that: The collar (13) is embedded with positioning sleeves (18) arranged in a ring array, and one end of the positioning seat (11) is provided with positioning blocks (21) arranged in a ring array and slidably installed inside the positioning sleeves (18).

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