Multi-component injection molding machine

Abstract

The application discloses a multi-component injection molding machine which comprises a main shooting table, an injection molding frame, an auxiliary shooting table, a rotating disc, a plurality of pull rods and a plurality of fixed supports. The main shooting table is arranged at the front end of the injection molding frame, the rotating disc is arranged in the injection molding frame and used for bearing and rotating a mold, the auxiliary shooting table is arranged at the left side or the right side of the injection molding frame, each fixed support is fixedly connected to the injection molding frame, one end of each pull rod is rotatably connected to the corresponding fixed support through a pin, the pull rod can rotate and swing in the vertical direction, and the other end of each pull rod penetrates into the auxiliary shooting table and is slidably connected to the auxiliary shooting table. The multi-component injection molding machine has the advantages of simple structure, flexible and convenient use, small floor space and the like, and can avoid uneven force on each pull rod.

Description

Technical Field

[0001] This application belongs to the field of injection molding machine technology, and specifically relates to a multi-component injection molding machine. Background Technology

[0002] Multi-component injection molding machines are specialized equipment that use multiple independent injection units to sequentially or simultaneously inject plastics of different materials, colors, or properties into the same mold, ultimately forming a single, integrated plastic part. Due to their integrated molding advantage, multi-component injection molding machines are widely used in the production of automotive parts, consumer electronics, medical devices, household goods, and many other fields.

[0003] Currently, existing multi-component injection molding machines are mainly divided into three layouts: through-shot layout, side-by-side horizontal layout, and horizontal-vertical layout. In the through-shot layout, two or more injection units are arranged opposite each other along the horizontal axis of the machine, with the mold in the middle, and molten material is injected into the cavity from opposite directions. In the side-by-side horizontal layout, injection units are arranged horizontally side-by-side on one or both sides of the machine. In the horizontal-vertical layout, one injection unit is horizontal, and the other is vertical, located on one side of the machine in an L-shaped or V-shaped arrangement. However, existing multi-component injection molding machines are not only bulky and complex in structure, but also lack flexibility in use, making them unsuitable for flexible and changing production environments. Utility Model Content

[0004] To address the aforementioned problems, this application discloses a multi-component injection molding machine to overcome or at least partially solve these problems.

[0005] To achieve the above objectives, this application adopts the following technical solution: This application discloses a multi-component injection molding machine, including a main injection stage, an injection molding machine frame, a secondary injection stage, a turntable, several tie rods, and several fixed supports; The main injection stage is located at the front end of the injection molding machine frame. The turntable is located inside the injection molding machine frame and is used to support and rotate the mold. The auxiliary injection stage is located on the left or right side of the injection molding machine frame. Each of the fixed supports is connected and fixed to the injection molding machine frame. One end of each of the tie rods is rotatably connected to the corresponding fixed support through a pin, so that the tie rod can rotate and swing in the vertical direction. The other end of each tie rod passes through the auxiliary injection stage and is slidably connected to the auxiliary injection stage.

[0006] Furthermore, the auxiliary injection stage includes a material cylinder, an injection stage body, and a pressure plate; The injection stage body has a semi-circular groove that matches the outer circumference of the barrel, so that the end of the barrel can be placed in the semi-circular groove when it is placed horizontally. A flange is formed on the outer circumference of the end of the barrel. A limiting groove that matches the flange is formed at the bottom of the semi-circular groove. The pressure plate is fixed at the opening of the semi-circular groove by screws or bolts, pressing and fixing the barrel in the semi-circular groove.

[0007] Furthermore, a lifting ring or hook is fixed on the material cylinder.

[0008] Furthermore, it also includes a secondary base, a sliding plate, a slide rail, a slider, a lead screw, a lead nut, and a drive unit; The slide rail is fixed on the upper side of the auxiliary machine base along the injection direction perpendicular to the auxiliary injection stage. The slider is located on the slide rail and is fixedly connected to the lower side of the sliding plate. The auxiliary injection stage is fixed on the upper side of the sliding plate. The nut is sleeved on the lead screw and fixedly connected to the sliding plate. The driving unit is used to drive the lead screw to rotate, thereby causing the sliding plate to slide on the auxiliary machine base.

[0009] Furthermore, the drive unit is a stepper motor or a rotary handwheel.

[0010] Furthermore, each of the two corners of the auxiliary machine base near the injection molding machine frame is fixed with a lifting ring or hook, and a crossbeam is fixed on the side of the auxiliary machine base away from the injection molding machine frame. The length direction of the crossbeam is perpendicular to the injection direction of the auxiliary injection station, and both ends of the crossbeam extend out of the auxiliary machine base. Each end of the crossbeam is fixed with a lifting ring or hook.

[0011] Furthermore, the bottom of the auxiliary base is fixed with multiple support blocks, and the bottom of each support block is provided with an opening hole, into which an adjustable foot pad is detachably connected.

[0012] Furthermore, the secondary firing platform also includes an operating handle or an operating screen; The operating handle or the operating screen is used to control the movement of the sub-firing platform.

[0013] Furthermore, the auxiliary firing platform also includes a lubricating oil pump and a pressure switch; The lubricating oil pump injects lubricating oil into the sub-launching stage through an oil circuit. The pressure switch is located on the oil circuit away from the lubricating oil pump and is used to detect the oil pressure in the oil circuit.

[0014] Furthermore, the auxiliary firing platform is an electric firing platform.

[0015] The advantages and beneficial effects of this application are: In the multi-component injection molding machine of this application, by setting a turntable inside the injection molding machine frame and detachably setting a secondary injection station on the left or right side of the injection molding machine frame, the secondary injection station can inject molten material into the mold on the turntable from the side of the injection molding machine frame. This not only makes the injection of molten material more flexible and convenient, but also reduces the footprint. Furthermore, the tie rod is rotatably connected to the fixed support on the injection molding machine frame through a pin, allowing the tie rod to rotate and swing in the vertical direction, providing space for the tie rod to move relative to the injection molding machine frame, thereby avoiding uneven force on each tie rod. Attached Figure Description

[0016] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a three-dimensional structural diagram of a multi-component injection molding machine in one embodiment of this application; Figure 2 for Figure 1 A magnified view of the structure at point A in the middle; Figure 3 for Figure 1 A magnified view of the structure at point B in the middle; Figure 4 for Figure 1 A magnified view of the structure at point C; Figure 5 This is a top view of a multi-component injection molding machine in one embodiment of this application; Figure 6 for Figure 5 Cross-sectional view at point AA; Figure 7 for Figure 5 Cross-sectional view at point BB; Figure 8 for Figure 5 Cross-sectional view at point DD; Figure 9 for Figure 8 A magnified view of the structure at point D.

[0017] In the diagram: 1. Main injection station; 2. Injection molding machine frame; 3. Secondary injection station; 4. Tie rod; 5. Fixed support; 6. Pin; 7. Barrel; 8. Injection station body; 9. Pressure plate; 10. Semi-circular groove; 11. Flange; 12. Lifting ring; 13. Secondary machine base; 14. Sliding plate; 15. Slide rail; 16. Slider; 17. Lead screw; 18. Lead nut; 19. Rotary handwheel; 20. Crossbeam; 21. Support block; 22. Opening hole; 23. Adjustable foot pad; 24. Limiting groove. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0020] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0021] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0022] The technical solutions provided by the various embodiments of this application are described in detail below with reference to the accompanying drawings.

[0023] One embodiment of this application discloses a multi-component injection molding machine, such as Figure 1 , Figure 2 , Figures 5 to 7 As shown, the multi-component injection molding machine includes a main injection unit 1, an injection frame 2, a secondary injection unit 3, a turntable (not shown in the figure), several tie rods 4, and several fixed supports 5. The number of tie rods 4 and fixed supports 5 is the same, preferably two or four.

[0024] The main injection stage 1 is located at the front end of the injection molding machine frame 2 (i.e., the end where the moving mold is located). The turntable is located inside the injection molding machine frame 2, used to support the mold and drive its rotation. The injection molding machine frame 2 also houses the mold closing structure. The auxiliary injection stage 3 is located on one side (left or right) of the injection molding machine frame 2. The other side of the injection molding machine is used to install a safety door, facilitating the removal of the injection-molded product from the safety door. Each fixed support 5 is connected and fixed to the injection molding machine frame 2. For example, the fixed support 5 can be fixed to the injection molding machine frame 2 by screws or bolts. One end of each tie rod 4 is rotatably connected to the corresponding fixed support 5 through a pin 6, allowing the tie rod 4 to rotate and swing vertically around the pin 6 as a rotation axis. The other end of each tie rod 4 passes into the auxiliary injection stage 3 and is slidably connected to the auxiliary injection stage 3. The tie rod 4 connects the auxiliary injection stage 3 and the injection molding machine frame 2. The tie rod 4 is used for positioning and guiding the auxiliary injection stage 3 during movement, as well as bearing the axial force during the injection process, ensuring the stable operation of the auxiliary injection stage 3 and precise control of the injection action. Among them, several tie rods 4 are evenly arranged on the left and right sides of the injection direction of the sub-injection table 3, so that each tie rod 4 bears the axial force evenly when the sub-injection table 3 performs the injection action.

[0025] Understandably, in the above connection structure, the sub-injection station 3 and the injection molding machine frame 2 can be separated by removing the pin 6 from the fixed support 5, making the assembly and disassembly of the sub-injection station 3 from the injection molding machine body more convenient. When the injection molding machine requires two-component injection, the sub-injection station 3 can be assembled onto the injection molding machine frame 2, with one component injected through the main injection station 1 and the other component injected through the sub-injection station 3. When the injection molding machine only requires single-component injection, the sub-injection station 3 can be detached from the injection molding machine frame 2, thereby reducing the footprint of the injection molding machine and making its use more flexible and convenient to meet different application scenarios. Furthermore, the T-shaped arrangement of the main injection station 1, sub-injection station 3, and injection molding machine frame 2 avoids the injection molding machine from being too long or too wide, and the structure is simpler with a smaller footprint. In addition, since the pull rod 4 is connected to the fixed support 5 through the pin 6, the pull rod 4 can rotate and swing vertically around the pin 6 as the axis of rotation. The pull rod 4 and the fixed support 5 are not fixedly connected. There is a certain gap between the two in the left and right directions of the sub-firing platform 3 (the axis of the pin 6). This can release the stress generated on the pull rod 4 during the movement of the sub-firing platform 3, so that each pull rod 4 is subjected to uniform force. This avoids the situation where the head of the pull rod 4 breaks due to the uneven force on the left and right pull rods when the sub-firing platform 3 moves back and forth.

[0026] In addition, the auxiliary injection station in this embodiment is an electric injection station. Since the electric injection station has advantages such as high precision, high efficiency, low energy consumption and small size, it can not only further reduce the footprint of the multi-component injection molding machine, but also enable the multi-component injection molding machine to be used for injection molding production of high-precision products.

[0027] The working steps of the multi-component injection molding machine in this embodiment are as follows: First, the injection molding machine closes the mold and injects a thermoplastic substrate into the mold cavity on the turntable via the main injection unit. After pressure holding, filling, and cooling are completed, the mold opens. Second, the turntable rotates 90° towards the operating side, causing the molded substrate in the mold cavity to rotate to the auxiliary injection unit side, and the injection molding machine closes the mold again. Then, the auxiliary injection unit begins to inject another thermoplastic material (soft or hard) onto the surface of the substrate. Finally, after the injection-molded product cools down, the mold opens, is ejected, and the part is removed in sequence.

[0028] In this embodiment, as Figure 8 and Figure 9 As shown, the auxiliary injection stage 3 includes a barrel 7, an injection stage body 8, and a pressure plate 9. The barrel 7 is used to heat and plasticize the raw material and to stably convey it, converting solid particles into a uniform molten state to provide qualified melt for subsequent precise injection. A lifting ring or hook is fixed to the barrel 7.

[0029] It should be noted that if the amount of molten material injected is insufficient or a special raw material needs to be switched during injection, the barrel 7 needs to be replaced.

[0030] The injection stage body 8 has a semi-annular groove 10 that matches the outer circumferential shape of the barrel 7, allowing the end of the barrel 7 to be placed within the semi-annular groove 10 when horizontally positioned. This ensures that the barrel 7 is coaxial with the output shaft of the motor drive structure within the injection stage body 8. A flange 11 is formed on the outer circumference of the end of the barrel 7, and a limiting groove 24 that matches the flange 11 is formed at the bottom of the semi-annular groove 10. When the end of the barrel 7 is placed within the semi-annular groove 10, the flange 11 is precisely located within the limiting groove 24. The flange 11 and the limiting groove 24 achieve axial positioning of the barrel 7 relative to the injection stage body 8. A pressure plate 9 is fixed to the opening of the semi-annular groove 10 with screws or bolts, pressing and fixing the barrel 7 within the semi-annular groove 10, thus achieving a quick connection between the barrel 7 and the injection stage body 8. When it is necessary to remove the material cylinder 7 from the injection table body 8, only the pressure plate 9 needs to be removed. The material cylinder 7 can then be lifted by the lifting equipment and the hooks or rings on the material cylinder 7, making the disassembly and assembly of the material cylinder 7 more convenient, thereby shortening the material change time and improving production efficiency.

[0031] And, as Figure 3 , Figure 6 and Figure 7 As shown, the multi-component injection molding machine also includes a secondary base 13, a sliding plate 14, a slide rail 15, a slider 16, a lead screw 17, a lead screw nut 18, and a drive unit.

[0032] Specifically, the slide rail 15 is fixed on the upper side of the auxiliary machine base 13 along the injection direction perpendicular to the auxiliary injection station 3. Preferably, there are two slide rails 15. The slider 16 is located on the slide rail 15 and is fixedly connected to the lower side of the sliding plate 14, allowing the sliding plate 14 to slide relative to the auxiliary machine base 13 via the slide rail 15 and the slider 16. The auxiliary injection station 3 is fixed on the upper side of the sliding plate 14. The nut 18 is sleeved on the lead screw 17 and fixedly connected to the sliding plate 14. The drive unit is used to drive the lead screw 17 to rotate, thereby causing the sliding plate 14 to slide on the auxiliary machine base 13, achieving flexible adjustment of the auxiliary injection station 3 in the horizontal position. In this embodiment, the drive unit is a rotating handwheel 19. When there is a left-right deviation between the mold nozzle and the center of the auxiliary injection station 3, the horizontal position of the auxiliary injection station 3 can be manually adjusted by rotating the rotating handwheel 19 to ensure that the center of the auxiliary injection station 3 is aligned with the mold nozzle in the horizontal direction.

[0033] Of course, in other embodiments, the drive unit can also be a stepper motor, thereby realizing electric adjustment when the sub-launching platform moves left and right, making operation more convenient.

[0034] In addition, the secondary firing platform 3 also includes an operating handle or operating screen. The operating handle or operating screen is used to control the actions of the secondary firing platform 3, that is, the operating handle or operating screen independently controls the forward, backward, melting, and injection actions of the secondary firing platform 3. Specifically, the operating handle or operating screen can be electrically connected to the secondary firing platform 3 through a free wiring harness. In this way, the operator can freely hold the operating handle or operating screen and move around the secondary firing platform 3. This makes it convenient for the operator to observe the actions of the secondary firing platform 3 while controlling the secondary firing platform 3 to perform the next action through the operating handle or operating screen, so as to achieve precise control of the actions of the secondary firing platform 3. The operation of two people can be changed to one person operating independently.

[0035] In this embodiment, as Figure 1 , Figure 5 and Figure 6 As shown, lifting rings 12 are fixed at both corners of the auxiliary base 13 near the injection molding machine frame 2. A crossbeam 20 is fixed on the side of the auxiliary base 13 away from the injection molding machine frame 2. The length direction of the crossbeam 20 is perpendicular to the injection direction of the sub-injection table 3, and both ends of the crossbeam 20 extend out of the auxiliary base 13. Lifting rings 12 are fixed at both ends of the crossbeam 20, forming four lifting points on the auxiliary base 13. When lifting the auxiliary base 13 and the sub-injection table 3 on the auxiliary base 13 through these four lifting rings 12, the balance of the auxiliary base 13 and the lifting safety can be ensured. The lifting rings 12 can also be replaced by hooks, which are also within the scope of protection of this application.

[0036] In addition, such as Figure 4As shown, multiple support blocks 21 are fixed to the bottom of the auxiliary machine base 13. Each support block 21 has an opening 22 at its bottom, and an adjustable foot pad 23 is detachably connected to the opening 22. The horizontal height of the auxiliary machine base 13 can be adjusted by the adjustable foot pad 23, so that the center of the auxiliary injection stage 3 is aligned with the mold nozzle in the vertical direction. The design of the opening 22 makes the assembly and disassembly of the adjustable foot pad 23 and the support block 21 more convenient. Of course, each support block 21 also has an opening 21 at its top, so that the support block 21 can be quickly connected to the auxiliary machine base 13 through the opening 22 and bolts.

[0037] In addition, the secondary firing platform 3 also includes a lubricating oil pump and a pressure switch.

[0038] The lubricating oil pump injects lubricating oil into the sub-injection stage 3 through the oil circuit. A pressure switch is located on the oil circuit away from the lubricating oil pump to detect the oil pressure within the circuit. When the pressure switch detects that the oil pressure in the oil circuit away from the lubricating oil pump has reached a preset value, it indicates that the lubricating oil has reached all parts of the sub-injection stage 3, and the lubricating oil pump can stop working. This structural design can solve the problem of damage to the injection molding machine caused by insufficient lubrication, greatly reducing the risk of damage to the injection molding machine.

[0039] In summary, in the multi-component injection molding machine of this application, by setting a turntable inside the injection molding machine frame and detachably setting a secondary injection station on the left or right side of the injection molding machine frame, the secondary injection station can inject molten material into the mold on the turntable from the side of the injection molding machine frame. This not only makes the injection of molten material more flexible and convenient, but also reduces the footprint. Furthermore, the tie rod is rotatably connected to the fixed support on the injection molding machine frame through a pin, allowing the tie rod to rotate and swing in the vertical direction, providing space for the tie rod to move relative to the injection molding machine frame, thereby avoiding uneven force on each tie rod.

[0040] The above description is merely a specific embodiment of this application. Under the guidance of the above teachings, those skilled in the art can make other improvements or modifications based on the above embodiments. Those skilled in the art should understand that the above specific description is only to better explain the purpose of this application, and the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A multi-component injection molding machine, characterized in that, It includes the main injection stage, injection molding machine frame, auxiliary injection stage, turntable, several tie rods, and several fixed supports; The main injection stage is located at the front end of the injection molding machine frame. The turntable is located inside the injection molding machine frame and is used to support and rotate the mold. The auxiliary injection stage is located on the left or right side of the injection molding machine frame. Each of the fixed supports is connected and fixed to the injection molding machine frame. One end of each of the tie rods is rotatably connected to the corresponding fixed support through a pin, so that the tie rod can rotate and swing in the vertical direction. The other end of each tie rod passes through the auxiliary injection stage and is slidably connected to the auxiliary injection stage.

2. The multi-component injection molding machine according to claim 1, characterized in that, The auxiliary firing platform includes a material cylinder, a firing platform body, and a pressure plate; The injection stage body has a semi-circular groove that matches the outer circumference of the barrel, so that the end of the barrel can be placed in the semi-circular groove when it is placed horizontally. A flange is formed on the outer circumference of the end of the barrel. A limiting groove that matches the flange is formed at the bottom of the semi-circular groove. The pressure plate is fixed at the opening of the semi-circular groove by screws or bolts, pressing and fixing the barrel in the semi-circular groove.

3. The multi-component injection molding machine according to claim 2, characterized in that, The material cylinder is fixed with a lifting ring or hook.

4. The multi-component injection molding machine according to claim 1, characterized in that, It also includes a secondary base, sliding plate, slide rail, slider, lead screw, lead nut and drive unit; The slide rail is fixed on the upper side of the auxiliary machine base along the injection direction perpendicular to the auxiliary injection stage. The slider is located on the slide rail and is fixedly connected to the lower side of the sliding plate. The auxiliary injection stage is fixed on the upper side of the sliding plate. The nut is sleeved on the lead screw and fixedly connected to the sliding plate. The driving unit is used to drive the lead screw to rotate, thereby causing the sliding plate to slide on the auxiliary machine base.

5. The multi-component injection molding machine according to claim 4, characterized in that, The drive unit is a stepper motor or a rotary handwheel.

6. The multi-component injection molding machine according to claim 4, characterized in that, The auxiliary machine base has two lifting rings or hooks fixed at the two corners on the side closest to the injection molding machine frame. A crossbeam is fixed on the side of the auxiliary machine base away from the injection molding machine frame. The length direction of the crossbeam is perpendicular to the injection direction of the auxiliary injection station, and both ends of the crossbeam extend out of the auxiliary machine base. Lifting rings or hooks are fixed at both ends of the crossbeam.

7. The multi-component injection molding machine according to claim 4, characterized in that, The bottom of the auxiliary base is fixed with multiple support blocks, and the bottom of each support block is provided with an opening hole, into which an adjustable foot pad is detachably connected.

8. The multi-component injection molding machine according to claim 1, characterized in that, The secondary firing platform also includes an operating handle or an operating screen; The operating handle or the operating screen is used to control the movement of the sub-firing platform.

9. The multi-component injection molding machine according to claim 1, characterized in that, The auxiliary firing platform also includes a lubricating oil pump and a pressure switch; The lubricating oil pump injects lubricating oil into the sub-launching stage through an oil circuit. The pressure switch is located on the oil circuit away from the lubricating oil pump and is used to detect the oil pressure in the oil circuit.

10. The multi-component injection molding machine according to any one of claims 1 to 9, characterized in that, The auxiliary firing platform is an electric firing platform.

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