Method of operating a multi-gating apparatus for injection molding

Abstract

The application discloses an operation method of a multi-gate processing device of an injection mold, relates to the field of injection mold subsurface gate processing equipment, and comprises an electrode chuck, a lower electrode pressing column is clamped below the electrode chuck, an electrode mounting disc is connected below the electrode pressing column, a plurality of inclined pressing ribs are arranged on the side surface of the electrode pressing column, an electrode driving device is slidably connected to the side surface of the inclined pressing rib, and a subsurface gate electrode is connected to the top end of the electrode driving device. The application can simultaneously process multiple subsurface gates, is suitable for the case that the number of mold cavities is relatively large, for example, 8 cavities or 16 cavities, the processing quality of each gate is basically the same, and the efficiency is obviously improved. In the process that the piston rod is bounced up by the disc-shaped spring sheet and then pressed down by the inclined pressing rib, spark oil is sucked into the lower part of the piston rod from the oil inlet hole and then quickly discharged from the oil outlet hole, so that the metal waste formed in the electric spark processing can be timely taken away, and accumulation of the metal waste is avoided.

Description

Technical Field

[0001] This invention relates to the field of injection mold submersible gate processing equipment, specifically to an operation method of an injection mold multi-gate processing device. Background Technology

[0002] In injection mold production, the submersible gate can be automatically removed from the product during demolding, and can be automatically separated from the product during ejection, making it suitable for automated production in factories. However, due to the shape limitations of the submersible gate and the need to ensure the accuracy of the gate (tolerance is generally ±0.02mm), electrical discharge machining (EDM) is usually used. When the number of mold cavities is small, machining the gate one by one with electrodes has little impact on processing efficiency. However, when the number of mold cavities is large, such as 8 or 16 cavities, machining the gate one by one takes a long time, which greatly affects efficiency. However, when machining multiple gates at the same time, the metal shavings generated during EDM are close together. After solidification, they accumulate in the EDM oil and are not easy to remove. They re-adhere to the gate, affecting the accuracy of EDM. Moreover, the diameter of these shavings is extremely small, half of which is no more than 1mm. After solidification, these shavings may fall back onto the machined surface, making removal very troublesome. Summary of the Invention

[0003] The purpose of this invention is to provide an operation method for a multi-gate injection mold processing device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an operation method for a multi-gate injection mold processing device, comprising an electrode chuck, an electrode pressing column held below the electrode chuck, an electrode mounting disk connected below the electrode pressing column, a plurality of inclined pressure ribs provided on the side of the electrode pressing column, an electrode driving device slidably connected to the side of the inclined pressure ribs, a submersible gate electrode connected to the top of the electrode driving device, the submersible gate electrode being pressed obliquely downward when the inclined pressure ribs press down on the electrode driving device, performing electrical discharge machining of the submersible gate and removing waste through the electrode driving device.

[0005] Preferably, the electrode pressing column includes a clamping part, a slanted pressing rib fixing part, and a connecting column. The clamping part is clamped and fixed inside the electrode chuck. The slanted pressing rib fixing part is welded and fixed below the clamping part, and the slanted pressing ribs are evenly distributed on the side of the slanted pressing rib fixing part. The top end of the connecting column is fixed below the slanted pressing rib fixing part, and the bottom end of the connecting column is slidably connected inside the electrode mounting disc.

[0006] Preferably, the electrode mounting disk is provided with a plurality of evenly distributed sliding grooves, and oil grooves are provided on the front and rear sides of the sliding grooves respectively.

[0007] Preferably, the electrode driving device includes a slanted pressure rod, an electrode seat, a piston rod, and a disc spring. The head of the slanted pressure rod is slidably connected to the slanted pressure rib, and the tail of the slanted pressure rod is fixedly connected to the electrode seat. The electrode seat has multiple oil inlet holes on its four sides. The piston rod is slidably installed inside the slanted pressure rod, and its head is pressed against the slanted pressure rib by the elastic force of the disc spring. The disc spring is installed inside the electrode seat, and the tail of the piston rod presses against the disc spring.

[0008] Preferably, the rear end of the submersible gate electrode is provided with an oil passage, and multiple oil outlet holes are evenly distributed at the lowest end of the oil passage and on the side of the submersible gate electrode.

[0009] Preferably, the waste removal mechanism includes an inner cylinder wall, an outer cylinder wall, and an electromagnetic coil. The inner cylinder wall and the outer cylinder wall are sealed at one end and open at the other end. The inner cylinder wall is fixed on the electrode mounting disk, and the outer cylinder wall forms a gap with the outermost edge of the electrode mounting disk. The electromagnetic coil is fixed on the outer side of the inner cylinder wall and the inner side of the outer cylinder wall, respectively.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] 1. This invention can process multiple submersible gates simultaneously, which is suitable for molds with a large number of cavities, such as 8 or 16 cavities. It also has high processing precision, and the processing quality of each gate is basically the same, resulting in a significant improvement in efficiency.

[0012] 2. The oil inlet and oil outlet provided in this invention can draw spark oil from the oil inlet into the area below the piston rod during the process of the piston rod being lifted by the disc spring and then pressed down by the inclined pressure rib, and then quickly discharge it from the oil outlet. Since the oil outlet is close to the working surface of the motor, the rapidly discharged spark oil forms a small-scale turbulence, which can quickly carry away the metal waste generated during the electrical discharge machining and prevent it from accumulating.

[0013] 3. The waste chip removal mechanism in this invention can quickly attract the waste chips generated by electrical discharge machining onto the coil through the magnetic force of the electromagnetic coil after the oil from the oil outlet is carried away by the oil. This prevents the waste chips from condensing and falling back onto the electrical discharge machining surface, thus affecting the machining quality. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention;

[0015] Figure 2 This is a schematic diagram of the cross-sectional structure of the present invention;

[0016] Figure 3 This is a schematic diagram of the electrode mounting disk structure of the present invention;

[0017] Figure 4 This is a schematic diagram of the electrode pressing column structure of the present invention;

[0018] Figure 5 This is an enlarged view of the electrode driving device structure of the present invention;

[0019] Figure 6 Bit Figure 2 Enlarged view of section B.

[0020] In the diagram: 1 - Electrode clamp;

[0021] 2-Electrode pressing column; 21-Angled pressing rib; 22-Clamping part; 23-Angled pressing rib fixing part; 24-Connecting column;

[0022] 3-Electrode mounting disc; 31-Slide groove; 32-Oil groove;

[0023] 4-Electrode drive device; 41-Angled pressure rod; 42-Electrode seat; 43-Piston rod; 44-Disc spring; 45-Oil inlet;

[0024] 5-Submersible gate electrode; 51-Oil passage; 52-Oil outlet. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Please see Figures 1 to 5 This invention provides a technical solution: an operation method for a multi-gate injection mold processing device, including an electrode chuck 1, an electrode pressing column 2 held below the electrode chuck 1, an electrode mounting disk 3 connected below the electrode pressing column 2, a plurality of inclined pressure ribs 21 provided on the side of the electrode pressing column 2, an electrode driving device 4 slidably connected to the side of the inclined pressure ribs 21, and a submersible gate electrode 5 connected to the top of the electrode driving device 4. When the inclined pressure ribs 21 press down on the electrode driving device 4, the submersible gate electrode 5 is pressed obliquely downward, performing electrical discharge machining of the submersible gate and removing waste through the electrode driving device 4.

[0027] In this embodiment, the electrode pressing column 2 includes a clamping part 22, a slanted pressing rib fixing part 23, and a connecting column 24. The clamping part 22 is clamped and fixed inside the electrode chuck 1. The slanted pressing rib fixing part 23 is welded and fixed below the clamping part 22, and the slanted pressing ribs 21 are evenly distributed on the side of the slanted pressing rib fixing part 23. The top end of the connecting column 24 is fixed below the slanted pressing rib fixing part 23. The connecting column 24 is slidably connected inside the bottom electrode mounting disk 3. During the electrical discharge machining process, the working electrode will move up and down repeatedly, causing the working electrode to generate pulse discharge with the product being processed. Then, the material is removed by electro-erosion. During this process, the electrode chuck 1 will clamp the clamping part 22. The repeated up and down movement of the electrode chuck 1 will drive the slanted pressing ribs 21 to move up and down.

[0028] In this embodiment, the electrode mounting disk 3 is provided with a plurality of evenly distributed sliding grooves 31, and oil grooves 32 are provided on the front and rear sides of the sliding grooves 31 respectively. The sliding grooves 31 are used to facilitate the sliding of the inclined pressure rod 41 in the electrode mounting disk 3, while the oil grooves 32 can meet the oil inlet requirements of the oil inlet hole 45 on the electrode seat 42.

[0029] In this embodiment, the electrode driving device 4 includes a slanted pressure rod 41, an electrode seat 42, a piston rod 43, and a disc spring 44. The head of the slanted pressure rod 41 is slidably connected to the slanted pressure rib 21, and the tail of the slanted pressure rod 41 is fixedly connected to the electrode seat 42. The electrode seat 42 has multiple oil inlet holes 45 on its four sides. The piston rod 43 is slidably installed inside the slanted pressure rod 41, and its head abuts against the slanted pressure rib 21 under the elastic force of the disc spring 44. The disc spring 44 is installed inside the electrode seat 42, and the tail of the piston rod 43 abuts against the disc spring 44. The slanted pressure rod 41 and the slanted pressure rib 21 are slidably connected. There is an oil inlet gap at the position. When the inclined pressure rib 21 moves upward in the oil inlet gap, the inclined pressure rib 21 does not contact the inclined pressure rod 41, so it will not drive the inclined pressure rod 41 upward. The disc spring 44 will first push the piston rod 43 upward. At this time, oil enters the electrode seat 42 through the oil inlet hole 45 until the inclined pressure rib 21 continues to move upward and contacts the inclined pressure rod 41. At this time, it will drive the inclined pressure rod 41 upward together. When the inclined pressure rib 21 moves downward, it will press the piston rod 43 downward until it presses the disc spring 44 downward and discharges the spark oil from the oil outlet hole 52. The discharged spark oil will carry away the metal waste generated during the electrical discharge machining process.

[0030] In this embodiment, the rear end of the submersible gate electrode 5 is provided with an oil passage 51, and a plurality of oil outlet holes 52 are evenly distributed at the lower end of the oil passage 51 and on the side of the submersible gate electrode 5.

[0031] The electrode mounting disk 3 is fixed with a waste removal mechanism 6. The waste removal mechanism 6 is used to collect the waste removed by the submersible gate electrode 5 to prevent it from condensing and falling at the gate. The waste removal mechanism 6 includes an inner cylinder wall 61, an outer cylinder wall 62 and an electromagnetic coil 63. The inner cylinder wall 61 and the outer cylinder wall 62 are sealed at one end and open at the other end. The inner cylinder wall 61 is fixed on the electrode mounting disk 3. The outer cylinder wall 62 and the outermost edge of the electrode mounting disk 3 form a gap. The electromagnetic coil 63 is fixed on the outer side of the inner cylinder wall 61 and the inner side of the outer cylinder wall 62 respectively.

[0032] Working principle: In use, the entire device is first mounted on the electrode chuck 1, and the electrode mounting disc 3 is fixed on the product to be processed. Then, the electrode drive device 4 is installed inside the electrode mounting disc 3, and the electrical discharge machining begins. The electrode chuck 1 will hold the clamping part 22. Through the repeated up and down movement of the electrode chuck 1, the inclined pressure rib 21 will move up and down. There is an oil inlet gap at the position where the inclined pressure rod 41 slides and the inclined pressure rib 21. When the inclined pressure rib 21 moves upward in the oil inlet gap, the inclined pressure rib 21 does not contact the inclined pressure rod 41, and therefore will not drive the inclined pressure rod 41 upward. The disc spring 44 will first push the piston rod 43 upward, and oil will enter the electrode seat 42 through the oil inlet hole 45 at this time. The inclined pressure rib 21 continues to move upward until it contacts the inclined pressure rod 41, at which point it will drive the inclined pressure rod 41 upward as well. When the inclined pressure rib 21 moves downward, it will press the piston rod 43 downward until it presses the disc spring 44 downward, causing the spark oil to be discharged from the oil outlet 52. The discharged spark oil will carry away the metal waste generated during the electrical discharge machining process. After the waste is carried away by the oil discharged from the oil outlet 52, it is quickly attracted to the coil by the magnetic force of the electromagnetic coil 63, preventing the waste from condensing and falling back onto the electrical discharge machining surface, thus affecting the machining quality. This invention can meet the requirements of multi-gate single-processing while smoothly carrying away the generated metal waste, ensuring that the entire processing process is fast and good.

[0033] Based on the above, this invention can process multiple submersible gates simultaneously, making it suitable for molds with a large number of cavities, such as 8 or 16 cavities. It also boasts high processing precision, with each gate exhibiting essentially the same processing quality, resulting in a significant improvement in efficiency. The oil inlet and outlet ports in this invention allow spark oil to be drawn from the inlet port into the area below the piston rod as it is lifted by the disc spring and then pressed down again by the inclined pressure rib. The oil is then rapidly discharged from the outlet port. Because the outlet port is close to the working surface of the motor, the rapidly discharged spark oil creates a small-scale turbulence, quickly carrying away metal debris generated during EDM and preventing its accumulation.

[0034] As is known from common technical knowledge, this invention can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not the only ones. All modifications within the scope of this invention or its equivalents are included in this invention.

Claims

1. An operating method for a multi-gate injection mold processing device, characterized in that: The processing device includes an electrode chuck (1), with an electrode pressing column (2) held below the electrode chuck (1). An electrode mounting disk (3) is connected below the electrode pressing column (2). Multiple inclined pressure ribs (21) are provided on the side of the electrode pressing column (2). An electrode driving device (4) is slidably connected to the side of the inclined pressure ribs (21). A submersible gate electrode (5) is connected to the tail of the electrode driving device (4). When the inclined pressure ribs (21) press down on the electrode driving device (4), the submersible gate electrode (5) is pressed obliquely downward to perform electrical discharge machining of the submersible gate and remove waste through the electrode driving device (4). A waste removal mechanism (6) is fixed on the edge of the electrode mounting disk (3). The waste removal mechanism (6) is used to collect the waste removed by the submersible gate electrode (5) to prevent it from condensing and falling at the gate. The electrode pressing column (2) includes a clamping part (22), a slanted pressing rib fixing part (23), and a connecting column (24). The clamping part (22) is clamped and fixed inside the electrode chuck (1). The slanted pressing rib fixing part (23) is welded and fixed below the clamping part (22), and the slanted pressing ribs (21) are evenly distributed on the side of the slanted pressing rib fixing part (23). The top of the connecting column (24) is fixed below the slanted pressing rib fixing part (23), and the bottom of the connecting column (24) is slidably connected inside the electrode mounting disc (3). The electrode driving device (4) includes a slant rod (41), an electrode seat (42), a piston rod (43), and a disc spring (44). The head of the slant rod (41) is slidably connected to the slant rib (21), and the tail of the slant rod (41) is fixedly connected to the electrode seat (42). The electrode seat (42) has multiple oil inlet holes (45) on its four sides. The piston rod (43) is slidably installed in the slant rod (41), and its head is pressed against the slant rib (21) under the elastic force of the disc spring (44). The disc spring (44) is installed in the electrode seat (42), and the tail of the piston rod (43) is pressed against the disc spring (44). The waste removal mechanism (6) includes an inner cylinder wall (61), an outer cylinder wall (62), and an electromagnetic coil (63). The inner cylinder wall (61) and the outer cylinder wall (62) are sealed at one end and open at the other end. The inner cylinder wall (61) is fixed on the electrode mounting disk (3). The outer cylinder wall (62) and the outermost edge of the electrode mounting disk (3) form a gap. The electromagnetic coil (63) is fixed on the outer side of the inner cylinder wall (61) and the inner side of the outer cylinder wall (62). The rear end of the submersible gate electrode (5) is provided with an oil passage (51), and multiple oil outlet holes (52) are evenly distributed at the lowest end of the oil passage (51) and on the side of the submersible gate electrode (5). The specific operation method is as follows: Step 1: Clamp the entire device on the electrode chuck (1), fix the electrode mounting disc (3) on the product to be processed, and then install the electrode driving device (4) inside the electrode mounting disc (3); Step 2: Start the electrical discharge machining. The electrode chuck (1) holds the clamping part (22). Through the repeated up and down movement of the electrode chuck (1), the inclined pressure rib (21) moves up and down. There is an oil inlet gap at the position where the inclined pressure rod (41) and the inclined pressure rib (21) slide. When the inclined pressure rib (21) moves up in the oil inlet gap, the inclined pressure rib (21) does not contact the inclined pressure rod (41), so it will not drive the inclined pressure rod (41) upward. The disc spring (44) will first push the piston rod (43) upward. At this time, the oil inlet hole (45) enters the electrode seat (42) until the inclined pressure rib (21) continues to move upward until it contacts the inclined pressure rod (41). At this time, it will drive the inclined pressure rod (41) upward together. Step 3: When the inclined pressure rib (21) moves down, it will press the piston rod (43) down continuously until the disc spring (44) is pressed down, and the spark oil is discharged from the oil outlet (52). The discharged spark oil will carry away the metal waste generated during the electrical discharge machining process. After the waste is carried away by the oil discharged from the oil outlet (52), it will be attracted to the coil by the magnetic force of the electromagnetic coil (63).

2. The operating method of the injection mold multi-gate processing device according to claim 1, characterized in that: The electrode mounting disk (3) is provided with a plurality of evenly distributed sliding grooves (31), and oil grooves (32) are provided on the front and rear sides of the sliding grooves (31).

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