Die casting machine with adjustable injection rod

Abstract

The present invention provides a die-casting machine with an adjustable injection rod, which specifically relates to the technical field of die-casting machines, including a die-casting table, wherein a hydraulic cylinder is installed on the upper surface of the die-casting table, a injection piston rod is connected to one side of the hydraulic cylinder, and an injection main rod body is connected to the end of the coupling away from the injection piston rod. The scraper is used to reciprocate up and down to scrape off metal adhering to the end face of the injection head, thereby reducing the amount of metal adhering to the end face of the injection head. An alarm is used to emit sound and light in time to remind surrounding staff so that the staff can stop the injection operation in time, and it is convenient to carry out maintenance or replace a new injection main rod body, thereby avoiding the injection effect of the injection head being affected by the deformation of the injection main rod body during the injection process, and also avoiding the deformation of the injection main rod body continuing the injection operation and causing damage to the mold in the die-casting machine, thereby improving the safety and stability of the injection main rod body and the injection head injection casting.

Description

Technical Field

[0001] The invention relates to the technical field of die-casting machines, in particular to a die-casting machine with an adjustable injection rod. Background Art

[0002] A die casting machine is a machine that uses pressure to cast. Under pressure, the die casting machine hydraulically injects molten metal into the mold for cooling and forming. After the mold is opened, a solid metal casting can be obtained. The injection rod in the die casting machine is an important component of the die casting machine, which is mainly used to inject molten metal into the mold cavity. The front end of the injection rod is connected to a injection head, which is used to inject high-temperature metal liquid and hydraulically inject the metal into the mold to achieve injection casting.

[0003] In the authorization announcement number CN209550559U, a horizontal die-casting machine with a vertical injection mechanism is disclosed. The injection mechanism adopts a vertical arrangement and injects molten metal into the mold cavity from the bottom of the equipment. Since the molten metal is directly poured into the injection port of the material tray, the injection waiting time is greatly shortened. On the one hand, heat loss is reduced, and on the other hand, the contact time between the molten metal and the air is avoided as much as possible to produce metal oxides due to too long a contact time, which affects the die-casting quality of the product.

[0004] Although the above die-casting machine has improved the die-casting effect to a certain extent, there are still some shortcomings in its specific use: First, the existing shot rod is generally connected to the piston rod of the hydraulic cylinder through a coupling or a split clamp, but due to thousands of injection impacts every day, the connection between the shot rod and the piston rod is prone to wear, resulting in a gap between the shot rod, the piston rod and the coupling or the split clamp. When the gap is large enough, it will cause the entire shot rod to deform, so that the shot head, the shot rod and the casting sleeve are in a state of different axes. After the shot rod is deformed, it is not easy for the staff to find it during the injection operation, and the shot rod cannot be repaired and replaced in time. If the deformed shot rod continues to operate, it will not only seriously affect the effect of die casting, but the deformed shot rod will also damage the mold on the die casting machine. In addition, the injection head in the injection rod of the above-mentioned die-casting machine will directly contact the molten metal. After the die-casting is completed, residual metal will inevitably adhere to the end surface of the injection head that contacts the molten metal. If not processed, the residual metal will be mixed into the new molten metal, thereby affecting the final molding effect of the die-casting.

[0005] Therefore, the present invention proposes a die-casting machine with an adjustable injection rod to compensate for and improve the deficiencies of the prior art. Summary of the invention

[0006] In view of the defects existing in the prior art, the present invention provides a die-casting machine with an adjustable injection rod, which can effectively solve the relevant technical problems raised by the background technology.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] The present invention discloses a die-casting machine with an adjustable injection rod, comprising a die-casting table, wherein a hydraulic cylinder is installed on the upper surface of the die-casting table, a injection piston rod is connected to one side of the hydraulic cylinder, a coupling is connected to the end of the injection piston rod away from the hydraulic cylinder, a main injection rod body is connected to the end of the coupling away from the injection piston rod, a injection head is connected to the end of the injection main rod body away from the coupling, a reminder protection mechanism is arranged at a position on the upper surface of the die-casting table corresponding to the injection head, the reminder protection mechanism comprises an observation cylinder fixedly connected to the upper surface of the die-casting table, the observation cylinder is divided into two symmetrical parts, namely a fixed cylinder fixed to the upper surface of the die-casting table and a movable cylinder detachably connected to the fixed cylinder, through holes for the injection head to pass through are provided at both ends of the fixed cylinder and the movable cylinder, and the fixed cylinder and the movable cylinder form a A complete cylindrical shape, an alarm is fixedly installed on the outer ring surface of the movable cylinder away from the fixed cylinder, slots are provided on the sides of both ends of the fixed cylinder and the movable cylinder close to the through hole, and perforated plates are inserted inside the slots. There are two perforated plates in total, and they are respectively located at the two ends of the observation cylinder, and circular holes for the injection main rod body and the injection head to pass through are respectively provided on the positions of the perforated plates corresponding to the through holes, and annular films are provided on the walls of the circular holes of the two perforated plates, an internal ring is provided inside the movable cylinder, and the internal ring is located on the side close to the injection head, and a plurality of abutment shafts are evenly inserted on the internal ring, and a plurality of springs are fixedly connected between the outer walls of the abutment shafts and the outer ring surface of the internal ring, and a trigger switch is fixedly installed on the positions of the internal cylinder walls of the fixed cylinder and the movable cylinder corresponding to the abutment shafts.

[0009] Preferably, the fixed cylinder and the movable cylinder are fixed by bolts and nuts, and both the fixed cylinder and the movable cylinder are made of transparent material.

[0010] Preferably, two annular films are provided, and both are made of high-temperature rubber material. The inner ring diameter of the annular film on the side close to the injection main rod body is the same as the outer diameter of the injection main rod body, and the inner ring diameter of the annular film on the side away from the injection main rod body is the same as the outer diameter of the injection head.

[0011] Preferably, the plurality of abutment shafts are distributed in a circular ring shape, and the ends of the plurality of abutment shafts close to the injection head are all hemispherical.

[0012] Preferably, an active scraping mechanism is provided on the side of the movable cylinder near the injection head, and the active scraping mechanism includes a reciprocating screw rod rotatably connected to the inner cylinder wall of the movable cylinder, the reciprocating screw rod is located on the side of the injection head near the built-in ring, a collar is provided on the outside of the reciprocating screw rod, the collar is threadedly connected to the reciprocating screw rod, and a displacement rod is fixedly connected to the side of the collar near the injection head, a grooved plate parallel to the reciprocating screw rod is fixedly connected at a position of the inner cylinder wall of the movable cylinder corresponding to the displacement rod, a strip groove is provided on the grooved plate, the displacement rod is slidably connected in the strip groove, a scraper is inserted at one end of the displacement rod away from the collar, a small motor is fixedly installed at a position of the outer ring surface of the movable cylinder corresponding to the reciprocating screw rod, the output shaft of the small motor passes through one end of the movable cylinder and is fixedly connected to the top of the reciprocating screw rod, a through hole is provided at a position of the bottom of the movable cylinder corresponding to the scraper, a collecting box is inserted in the through hole provided on the movable cylinder, the collecting box is located directly below the scraper, and the top of the collecting box is open.

[0013] Preferably, a pentagonal column is provided at the position where the displacement rod and the scraper are plugged together, a pentagonal hole for the pentagonal column to be plugged into is provided at the position of the scraper corresponding to the pentagonal column, and the pentagonal column is tightly plugged into the pentagonal groove.

[0014] Preferably, the scraper is made of heat-resistant rubber material, and the surface of the scraper on the side away from the injection head is an inclined surface, and the surface of the scraper on the side close to the injection head is a flat surface.

[0015] Preferably, two magnetic sheets 1 are symmetrically fixedly connected to the outer surface of the collecting box close to the moving cylinder, and a magnetic sheet 2 is fixedly connected to the position of the bottom of the moving cylinder corresponding to the two magnetic sheets 1, and the magnetic sheet 1 and the magnetic sheet 2 are made of opposite magnetic materials.

[0016] Preferably, the active scraping mechanism also includes a mating component, which includes a rod boss rotatably connected to the inner cylinder wall of the movable cylinder, the rod boss is located on the side away from the scraper, the rod boss is composed of a cam above and a rod body fixedly connected to the bottom of the cam, a pulley 1 is fixedly connected to the outer ring surface of the rod body in the rod boss, a pulley 2 is fixedly connected to the bottom of the reciprocating screw, a synchronous belt is transmission-connected between the pulley 2 and the pulley 1, a limiting ring is fixedly connected to the inner cylinder wall of the movable cylinder, the limiting ring is located between the rod boss and the scraper when the two are at the bottom, a T-shaped plate is inserted in the center of the limiting ring, and a spring 2 is fixedly connected between the T-shaped plate and the limiting ring.

[0017] Preferably, a linkage heat dissipation mechanism is provided inside the upper part of the movable cylinder, and the linkage heat dissipation mechanism includes a top synchronous wheel 2 fixedly connected to the reciprocating screw rod, an air vent is fixedly connected to the middle part above the movable cylinder, a filter is inserted into the top of the air vent, the inner center of the air vent is rotatably connected to a rotating shaft, a fan is fixedly connected to the lower end of the rotating shaft, a synchronization wheel 1 is fixedly connected to the outer ring surface of the fan, and a transmission belt is connected between the synchronization wheel 1 and the synchronization wheel 2.

[0018] Compared with the known prior art, the technical solution provided by the present invention has the following beneficial effects:

[0019] The die-casting machine is provided with components such as a shaft stop and a trigger switch on the path of the reset movement of the injection main rod and the injection head, and uses an alarm to emit sound and light in time to remind the surrounding staff so that the staff can stop the injection operation in time, and it is convenient to repair or replace a new injection main rod. On the one hand, it avoids that the injection effect of the injection head is affected by the deformation of the injection main rod during the injection process, and on the other hand, it avoids that the injection main rod that has been deformed continues the injection operation and causes damage to the mold in the die-casting machine, thereby improving the safety and stability of the injection main rod and the injection head injection casting;

[0020] After the shot head is reset to its initial position in the complete cylinder composed of the fixed cylinder and the movable cylinder, the fixed cylinder and the movable cylinder cooperate with two annular films to ensure that the shot head can be in a relatively closed space, so as to protect the shot head after use, and prevent dust and impurities in the external environment from adhering to the outer surface of the shot head, thereby avoiding affecting the effect of subsequent shot operations of the shot head;

[0021] The fixed cylinder and the movable cylinder made of transparent material are convenient for the staff to observe the use of the pressure head in real time. At the same time, after the bolts and nuts are separated, the movable cylinder and the fixed cylinder are separated, which is also convenient for the staff to repair and replace the new pressure head, ensuring the practicality of the replacement and maintenance of the pressure head;

[0022] After the shot head is reset to the initial position, the scraper is used to reciprocate up and down to scrape off the metal attached to the end face of the shot head, thereby reducing the amount of metal attached to the end face of the shot head and preventing the residual metal from mixing into the molten metal of the next shot operation, thereby ensuring the subsequent shot quality of the shot head;

[0023] The rubber column in the T-shaped plate is used to intermittently knock the scraper to generate vibration force, so as to reduce the residual metal on the end face of the pressure head when the scraper is cleaning, and the metal is attached to the outer wall of the scraper, so as to avoid the residual metal being brought back to the end face of the pressure head when the scraper is reciprocating to clean, so as to ensure the effectiveness of the scraper to reciprocate to clean the metal attached to the end face of the pressure head;

[0024] Simply pull the collection box downward from the through hole. Timely collection of the collection box not only prevents metal from falling onto the die-casting table, but also facilitates the staff to easily dump and subsequently process the metal.

[0025] The rotating shaft is continuously rotated inside the movable cylinder and the fixed cylinder to discharge the air inside the movable cylinder outward through the air vent and the filter, which is beneficial to the heat dissipation effect after the injection head is retracted into the fixed cylinder and the movable cylinder. At the same time, it also avoids excessive heat accumulation and affects the trigger switch installed inside the two. In addition, the filter can block the entry of external dust and impurities while ensuring the heat dissipation and ventilation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a main perspective structural diagram of the present invention;

[0027] Figure 2 It is a partial three-dimensional structural diagram of the relevant components of the fixed cylinder and the movable cylinder of the present invention;

[0028] Figure 3 It is a partial three-dimensional structural diagram of the slot and the related parts of the perforated plate of the present invention;

[0029] Figure 4 It is a partial three-dimensional structural diagram of the relevant parts of the built-in ring of the present invention;

[0030] Figure 5 It is a partial structural diagram of the internal ring and the related parts of the shaft contact part of the present invention;

[0031] Figure 6 It is a partial three-dimensional structural diagram of the relevant parts of the reciprocating screw rod of the present invention;

[0032] Figure 7 It is a partial three-dimensional structural diagram of the relevant components of the collecting box of the present invention;

[0033] Figure 8 It is a partial three-dimensional structural diagram of the relevant components of the displacement rod of the present invention;

[0034] Fig. 9 It is a partial three-dimensional structural diagram of the relevant components below the cam of the present invention;

[0035] Fig.10 It is a partial three-dimensional structural diagram of the relevant components of the ventilation pipe of the present invention;

[0036] Fig.11 It is a partial three-dimensional structural diagram of the ventilation pipe and filter screen related components of the present invention.

[0037] The numbers in the figure represent:

[0038] 1. Die casting table; 11. Hydraulic cylinder; 12. Shot piston rod; 13. Coupling; 14. Shot main rod body; 15. Shot head;

[0039] Reminder protection mechanism: 21, fixed cylinder; 22, moving cylinder; 23, alarm; 24, slot; 25, plate with holes; 26, annular film; 27, built-in ring; 28, shaft stop; 29, spring 1; 210, trigger switch;

[0040] Active scraping mechanism: 31, reciprocating screw rod; 32, sleeve ring; 33, displacement rod; 34, grooved plate; 35, scraper; 36, small motor; 37, collection box; 371, magnetic sheet 1; 372, magnetic sheet 2;

[0041] Matching components: 38, belt rod convex plate; 39, pulley 1; 310, pulley 2; 311, synchronous belt; 312, limit ring; 313, T-shaped plate; 314, spring 2;

[0042] Linked heat dissipation mechanism: 41, air vent; 42, rotating shaft; 43, fan; 44, synchronous wheel one; 45, synchronous wheel two; 46, transmission belt; 47, filter screen. DETAILED DESCRIPTION

[0043] The present invention will be further described below in conjunction with the embodiments.

[0044] Embodiment 1: Figures 1 to 3 As shown, a die-casting machine with an adjustable injection rod comprises a die-casting table 1, a hydraulic cylinder 11 is installed on the upper surface of the die-casting table 1, a side of the hydraulic cylinder 11 is connected to an injection piston rod 12, an end of the injection piston rod 12 away from the hydraulic cylinder 11 is connected to a coupling 13, an end of the coupling 13 away from the injection piston rod 12 is connected to an injection main rod body 14, and an end of the injection main rod body 14 away from the coupling 13 is connected to an injection head 15, and the hydraulic cylinder 11 is controlled by an external controller to adjust and control the advancement speed of the injection piston rod 12. A reminder protection mechanism is provided at a position on the upper surface of the die-casting table 1 corresponding to the injection head 15.

[0045] As an improvement, Figures 1 to 5 As shown, the reminder protection mechanism includes an observation tube fixedly connected to the upper surface of the die-casting table 1, and the observation tube is divided into two symmetrical parts, namely a fixed tube 21 fixed to the upper surface of the die-casting table 1 and a movable tube 22 detachably connected to the fixed tube 21. The position of the observation tube matches the injection head 15, and the injection head 15 can enter the inside of the observation tube. The fixed tube 21 and the movable tube 22 are fixed by bolts and nuts, and both the fixed tube 21 and the movable tube 22 are made of transparent material, specifically polycarbonate transparent material, which is easy to process and manufacture, high temperature resistant and not easy to deform.

[0046] When in use, the fixed cylinder 21 and the movable cylinder 22 made of transparent material are used to facilitate the staff to observe the use of the pressure shooting head 15 in real time. At the same time, after the bolts and nuts are separated, the movable cylinder 22 is separated from the fixed cylinder 21, which is convenient for the staff to repair and replace the new pressure shooting head 15. Through holes for the pressure shooting head 15 to move are opened at both ends of the fixed cylinder 21 and the movable cylinder 22, and the fixed cylinder 21 and the movable cylinder 22 form a complete observation cylinder.

[0047] Specifically, when the injection head 15 is in the initial position, it is located inside the observation tube composed of the fixed tube 21 and the movable tube 22. The other side of the observation tube on the die casting table 1 away from the hydraulic cylinder 11 is equipped with a movable and fixed mold, wherein the fixed mold is adjacent to the observation tube, and the other side of the fixed mold away from the observation tube is equipped with a movable mold. A casting sleeve is provided on the side of the fixed mold close to the movable tube 22, and the casting sleeve is located on the same horizontal axis line as the injection main rod body 14 and the injection head 15.

[0048] Note: The above-mentioned die-casting table 1, hydraulic cylinder 11, injection piston rod 12, coupling 13, injection main rod body 14, injection head 15, movable and fixed molds, and pouring sleeve are all components of the existing die-casting machine, among which the movable and fixed molds and pouring sleeve are not marked in the figure.

[0049] An alarm 23 is fixedly mounted on the outer ring surface of the movable cylinder 22 away from the fixed cylinder 21. The alarm 23 has the functions of sounding and lighting. The alarm 23 used in this embodiment is a common sound and light warning device. A slot 24 is provided on both ends of the fixed cylinder 21 and the movable cylinder 22 near the through hole. A perforated plate 25 is inserted inside the slot 24. Two perforated plates 25 are provided, which are respectively located at both ends of the observation cylinder. The perforated plates 25 are respectively provided with circular holes for the injection main rod body 14 and the injection head 15 to pass through at the corresponding parts of the perforated plates 25 and the through holes. An annular film 26 is provided on the hole wall of the circular holes of the two perforated plates 25. The annular film 26 is made of high temperature resistant elastic rubber material. The inner ring diameter of the annular film 26 on the side close to the injection main rod body 14 is the same as the outer diameter of the injection main rod body 14, and the inner ring diameter of the annular film 26 on the side away from the injection main rod body 14 is the same as the outer diameter of the injection head 15.

[0050] An internal ring 27 is provided inside the moving cylinder 22, and the internal ring 27 is located on the same horizontal axis as the main injection rod body 14 and the injection head 15. The internal ring 27 is specifically located on the perforated plate 25 on the side away from the main injection rod body 14, and multiple abutment shafts 28 are evenly inserted on the internal ring 27. The multiple abutment shafts 28 are distributed in a circular ring shape, and the ends of the multiple abutment shafts 28 facing the injection head 15 are all hemispherical. The multiple abutment shafts 28 distributed in a circular ring shape are easy to contact the outer surface of the injection head 15 after deformation. When the multiple abutment shafts 28 distributed in a circular ring shape are in the initial position, they will not contact the outer surface of the injection head 15 that has not been deformed and bent.

[0051] A spring 29 is fixedly connected between the outer wall of the multiple abutting shafts 28 and the outer ring surface of the built-in ring 27. The function of the spring 29 is to keep the abutting shafts 28 of each direction in their initial state when not being abutted, so that the abutting shafts 28 will not be accidentally touched under the influence of gravity due to different installation directions. A trigger switch 210 is fixedly installed on the inner wall of the fixed cylinder 21 and the movable cylinder 22 at a position corresponding to the abutting shafts 28. In the initial state, a gap is left between the end of the multiple abutting shafts 28 away from the spring 29 and the trigger switch 210, and the distance of the gap is the deformation size of the injection main rod body 14 when it needs to be replaced. When the abutting shaft 28 abuts the trigger switch 210, the alarm 23 will be activated.

[0052] During use: When the die-casting operation begins, the staff starts the hydraulic cylinder 11 to prompt the injection piston rod 12 to drive the injection main rod body 14 and the injection head 15 to move horizontally in the direction close to the built-in ring 27, that is, to make the injection head 15 move horizontally in the direction close to the casting sleeve. After the injection head 15 passes through the fixed cylinder 21 and the movable cylinder 22 and enters the casting sleeve, the injection piston rod 12 drives the injection head 15 to continue to move horizontally to perform the injection casting work. In the specific operation, the staff can control the hydraulic cylinder 11 through the external controller to prompt the injection piston rod 12 to drive the injection head 15 to adjust the speed, specifically, first slow and then fast. Slow speed is convenient for discharging air during die casting, and fast speed is beneficial to the molding quality of die castings.

[0053] When the die-casting is completed, the hydraulic cylinder 11 drives the die-casting piston rod 12, the die-casting main rod body 14, and the die-casting head 15 to reset horizontally in the opposite direction. During the resetting process of the die-casting head 15 and the die-casting main rod body 14, if the coupling 13 at the connection between the die-casting main rod body 14 and the die-casting piston rod 12 is worn and damaged due to long-term use, the die-casting main rod body 14 will be deformed, that is, the die-casting main rod body 14 will be tilted, that is, the die-casting main rod body 14 and the die-casting head 15 are no longer on the same axial line with the built-in ring 27. When the deformed injection main rod body 14 and injection head 15 perform reverse horizontal reset movement to the built-in ring 27, the injection head 15 will come into conflict with the abutment shaft 28. Since there are multiple abutment shafts 28 distributed in a ring shape, it is convenient for the abutment shafts 28 to come into conflict with the outer wall of the injection head 15 in different directions, thereby monitoring the deformation of the injection main rod body 14 and the injection head 15 from all angles.

[0054] When the abutting shaft 28 is resisted by the injection head 15, the abutting shaft 28 moves toward the side away from the center of the inner ring 27, and the abutting shaft 28 resists the trigger switch 210. When the trigger switch 210 is triggered by the resistance, the alarm 23 is activated to emit sound and light reminders.

[0055] Therefore, by arranging components such as the axle 28 and the trigger switch 210 on the path of the resetting movement of the injection main rod body 14 and the injection head 15, when the injection main rod body 14 and the injection head 15 are in the process of resetting to the initial position after the injection casting is completed, when the injection main rod body 14 is deformed and needs to be replaced, the alarm 23 is used to emit sound and light in time to remind the surrounding staff so that the staff can stop the injection operation in time to repair or replace the new injection main rod body 14 and the coupling 13. At the same time, the deformed injection main rod body 14 and the injection head 15 will also cause the deformation of the annular film 26 when returning, and the annular film 26 needs to be replaced when the injection main rod body 14 or the injection head 15 is replaced. The staff replaces the deformed parts in time, which, on the one hand, avoids the deformation of the injection main rod body 14 affecting the injection effect of the injection head 15 during the injection process; on the other hand, it avoids the deformation of the injection main rod body 14 from continuing the injection operation and causing damage to the mold in the die-casting machine, thereby improving the safety and stability of the injection castings of the injection main rod body 14 and the injection head 15.

[0056] When the injection main rod body 14 has not been deformed, that is, when it does not need to be replaced, the annular film 26 will not be deformed when the injection piston rod 12 drives the injection main rod body 14 and the injection head 15 to reset horizontally in the opposite direction. At the same time, the injection head 15 will not conflict with the abutment shaft 28, and the alarm 23 will not make any sound or light.

[0057] When the shooting head 15 is reset to the initial position in the complete cylinder composed of the fixed cylinder 21 and the movable cylinder 22, the fixed cylinder 21 and the movable cylinder 22 cooperate with the two annular films 26 to ensure that the shooting head 15 can be in a relatively closed space, so as to protect the shooting head 15 after use, and prevent dust and impurities in the external environment from adhering to the outer surface of the shooting head 15, thereby avoiding affecting the effect of subsequent shooting operations of the shooting head 15.

[0058] In addition, considering the long-term contact and friction between the annular film 26 and the injection main rod body 14 and the injection head 15, as well as the influence of the residual heat on the surfaces of the two, the annular film 26 may be worn or damaged. At this time, the staff needs to replace the annular film 26 in time to ensure that the annular film 26 cooperates with the fixed cylinder 21 and the movable cylinder 22 to form a sealing effect of the closed space. When replacing the annular film 26, the hydraulic cylinder 11 first drives the injection piston rod 12, the injection main rod body 14, and the injection head 15 to move horizontally out of the interior of the fixed cylinder 21. In this process, since the annular film 26 is made of high-temperature resistant elastic rubber material, when the injection head 15 passes through the annular film 26 near the injection rod body 14, the annular film 26 will be deformed, so that the injection head 15 can pass through the annular film 26 normally. Then the staff extracts the perforated plate 25 from the inside of the slot 24, and then inserts the new perforated plate 25 and the annular film 26 back into the slot 24, thereby achieving the effect of convenient replacement of the annular film 26, ensuring that the annular film 26 cooperates with the fixed cylinder 21 and the movable cylinder 22 to form a sealing effect of the closed space, reducing the dust from the external environment from entering the fixed cylinder 21 and the movable cylinder 22.

[0059] Embodiment 2: Figure 2 , Figures 6 to 9 As shown, the above-mentioned die-casting machine with an adjustable injection rod also includes an active scraping mechanism arranged inside the movable cylinder 22 near the injection head 15. The active scraping mechanism includes a reciprocating screw 31 rotatably connected to the inner cylinder wall of the movable cylinder 22. The reciprocating screw 31 is located on the side of the injection head 15 near the built-in ring 27. The outer part of the reciprocating screw 31 is provided with a collar 32, which is initially located at the bottom of the reciprocating screw 31, and the collar 32 is threadedly connected to the reciprocating screw 31.

[0060] The side of the collar 32 close to the injection head 15 is fixedly connected with a displacement rod 33, and a grooved plate 34 parallel to the reciprocating screw 31 is fixedly connected at a position corresponding to the displacement rod 33 and the inner wall of the movable cylinder 22. The grooved plate 34 is provided with a strip groove, and the displacement rod 33 is slidably connected in the strip groove. A scraper 35 is inserted at the end of the displacement rod 33 away from the collar 32. The scraper 35 is made of heat-resistant rubber material, and the side surface of the scraper 35 away from the injection head 15 is an inclined surface, and the side surface of the scraper 35 close to the injection head 15 is a plane. Specifically, the end face of the injection head 15 away from the injection main rod body 14 is located on the path of the up and down movement of the scraper 35 plane. That is to say, when the scraper 35 moves up and down, its plane can fit with the end face of the injection head 15, and the inclined surface and the plane of the scraper 35 are matched to better scrape off the metal chips attached to the end face of the injection head 15.

[0061] A pentagonal column is provided at the position where the displacement rod 33 and the scraper 35 are plugged in. A pentagonal hole for the pentagonal column to be plugged in is provided at the position corresponding to the pentagonal column of the scraper 35. The pentagonal column is tightly plugged into the pentagonal groove, and the scraper 35 is detachably fixed on the displacement rod 33 so that the staff can replace a new scraper 35. A small motor 36 is fixedly installed on the outer ring surface of the movable cylinder 22 at a position corresponding to the reciprocating screw 31. The opening and closing of the small motor 36 is controlled by an external controller. The output shaft of the small motor 36 passes through one end of the movable cylinder 22 and is fixedly connected to the top of the reciprocating screw 31. The rotation of the reciprocating screw 31 is controlled by the small motor 36, and the up and down movement of the scraper 35 is controlled. A through hole is opened at the position corresponding to the scraper 35 at the bottom of the movable cylinder 22. A collection box 37 is inserted into the through hole opened on the movable cylinder 22. The collection box 37 is located directly below the scraper 35, and the top of the collection box 37 is open.

[0062] Furthermore, if Figure 7 As shown, two magnetic sheets 1 371 are symmetrically fixedly connected to the outer surface of the collecting box 37 close to the movable cylinder 22, and a magnetic sheet 2 372 is fixedly connected to the position corresponding to the two magnetic sheets 1 371 at the bottom of the movable cylinder 22. The magnetic sheets 1 371 and 372 are made of opposite magnetic materials. The magnetic sheets 1 371 and 372 are used to improve the stability of the collecting box 37 inserted in the through hole.

[0063] Furthermore, if Figure 6 and Fig. 9 As shown, the active scraping mechanism also includes a matching component, which includes a rod boss 38 rotatably connected to the inner wall of the moving cylinder 22, the rod boss 38 is composed of a cam on the top and a rod body fixedly connected to the bottom of the cam, a pulley 1 39 is fixedly connected to the outer ring surface of the rod body in the rod boss 38, a pulley 2 310 is fixedly connected to the bottom of the reciprocating screw 31, and a synchronous belt 311 is connected between the pulley 2 310 and the pulley 1 39 for transmission. A limiting ring 312 is fixedly connected to the inner cylinder wall of the moving cylinder 22. The limiting ring 312 is located between the rod convex disc 38 and the scraper 35 when the two are located at the bottom. A T-shaped plate 313 is inserted in the center of the limiting ring 312. The surface of the T-shaped plate 313 away from the rod convex disc 38 is evenly provided with a plurality of rubber columns, and a cylindrical rod is provided at the end close to the limiting ring 312. The scraper 35 is located on the horizontal movement path of the T-shaped plate 313. Specifically, when the scraper 35 and the T-shaped plate 313 are at the same horizontal position, after the T-shaped plate 313 moves horizontally, the rubber column can contact the horizontal surface of the scraper 35. A second spring 314 is fixedly connected between the T-shaped plate 313 and the limiting ring 312. When the T-shaped plate 313 moves toward the scraper 35, the spring 314 can be rebounded to reset the T-shaped plate 313.

[0064] During use: Considering that the end surface of the injection head 15 will directly contact the high-temperature metal liquid during the injection operation, the end surface is easily stained with residual metal after the injection is completed. When the undeformed and tilted injection main rod body 14 drives the injection head 15 to enter the fixed cylinder 21 and the movable cylinder 22 and is in the initial position, the staff can also start the small motor 36 through the controller to drive the reciprocating screw 31 to rotate through its output shaft. As the reciprocating screw 31 rotates, the ring 32 is gradually displaced upward under the restriction of the displacement rod 33 and the strip grooves on the grooved plate 34. In the process, the scraper 35 is displaced upward along the end surface of the injection head 15, so that the residual metal attached to the end surface of the injection head 15 is scraped off in time. When the reciprocating screw 31 rotates and drives the ring 32 and the scraper 35 to move to the top, the reciprocating screw 31 continues to rotate, which drives the scraper 35 to start to move downward in the opposite direction, and then scrapes off the residual metal on the end surface of the injection head 15, and the scraped metal falls into the collection box 37 for collection.

[0065] Therefore, after the injection head 15 is reset to the initial position, the scraper 35 is used to reciprocate up and down to scrape off the metal attached to the end surface of the injection head 15, thereby reducing the metal adhesion on the end surface of the injection head 15, and further avoiding the residual metal from mixing into the molten metal of the next injection operation, thereby ensuring the subsequent injection quality of the injection head 15.

[0066] When the staff needs to pour out the residual metal that has fallen into the collection box 37, they first hold the collection box 37 and apply an external force greater than the magnetic attraction between the magnetic piece 1 371 and the magnetic piece 2 372, and then pull the collection box 37 downward from the through hole. The timely collection of the collection box 37 can not only prevent the metal from falling onto the die-casting table 1, but also facilitate the staff to easily pour it out and handle it later.

[0067] When the reciprocating screw 31 rotates, the pulley 1 39 and the belt rod convex disc 38 are driven to rotate synchronously through the pulley 2 310 and the synchronous belt 311. As the belt rod convex disc 38 continues to rotate, the raised part of the cam will intermittently contact the end face of the cylindrical rod, thereby prompting the T-shaped plate 313 and the rubber column to move horizontally toward the direction close to the scraper 35, and the spring 2 314 is compressed during the process. When the raised part of the cam does not contact the cylindrical rod, the cylindrical rod in the T-shaped plate 313 is driven to reset in the opposite direction under the action of the rebound force of the spring 2 314. When the scraper 35 moves downward to be flush with the rubber column in the T-shaped plate 313, the rubber column is driven to intermittently hit the scraper 35 in cooperation with the cam. Therefore, the rubber column in the T-shaped plate 313 is used to intermittently knock the scraper 35 to generate a vibration force, so as to reduce the residual metal on the end face of the injection head 15 when the scraper 35 is cleaning. The metal adheres to the outer wall of the scraper 35, thereby avoiding the residual metal being brought back to the end face of the injection head 15 again when the scraper 35 is scraping back and forth, thereby ensuring the cleanliness of the scraper 35 and being able to continuously clean the injection head 15.

[0068] Embodiment 3: Figure 2 , Fig.10 , Fig.11 As shown, the above-mentioned die-casting machine with an adjustable injection rod also includes a linkage heat dissipation mechanism arranged on the upper part of the movable cylinder 22, and the linkage heat dissipation mechanism includes a top synchronous wheel 2 45 fixedly connected to the reciprocating screw 31, and a ventilation tube 41 is fixedly connected to the middle part above the movable cylinder 22, and a filter screen 47 is inserted into the top of the ventilation tube 41, and the inner center of the ventilation tube 41 is rotatably connected to a rotating shaft 42, and a fan 43 is fixedly connected to the lower end of the rotating shaft 42, and a synchronous wheel 1 44 is fixedly connected to the outer ring surface of the fan 43, and a transmission belt 46 is connected between the synchronous wheel 1 44 and the synchronous wheel 2 45.

[0069] During use: Considering that residual heat will be stored on the shot head 15 after the shot head 15 is retracted into the fixed cylinder 21 and the movable cylinder 22, it is necessary to prevent heat from accumulating inside the fixed cylinder 21 and the movable cylinder 22. During the rotation of the reciprocating screw 31, the synchronous wheel 45 and the transmission belt 46 will drive the synchronous wheel 1 44 to rotate synchronously, thereby driving the fan 43 to rotate synchronously, and the rotating shaft 42 will continuously rotate inside the movable cylinder 22 and the fixed cylinder 21, so that the air inside the movable cylinder 22 is discharged to the outside through the air vent 41 and the filter 47, thereby facilitating the heat dissipation effect after the shot head 15 is retracted into the fixed cylinder 21 and the movable cylinder 22, and also preventing excessive heat accumulation from affecting the trigger switch 210 installed inside the two. Moreover, the filter 47 provided can prevent external dust and impurities from entering under the premise of ensuring the heat dissipation and ventilation effect.

[0070] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A die-casting machine with an adjustable injection rod, comprising a die-casting table (1), a hydraulic cylinder (11) being mounted on the upper surface of the die-casting table (1), a side of the hydraulic cylinder (11) being connected to an injection piston rod (12), an end of the injection piston rod (12) away from the hydraulic cylinder (11) being connected to a coupling (13), an end of the coupling (13) away from the injection piston rod (12) being connected to an injection main rod body (14), and an end of the injection main rod body (14) away from the coupling (13) being connected to an injection head (15), characterized in that: A reminder protection mechanism is provided at a position on the upper surface of the die-casting table (1) corresponding to the die-casting head (15); The warning protection mechanism comprises an observation tube fixedly connected to the die casting table (1), the observation tube being divided into two symmetrical parts, namely a fixed tube (21) fixed to the upper surface of the die casting table and a movable tube (22) detachably connected to the fixed tube (21), through holes for the injection head (15) to pass through are provided at both ends of the fixed tube (21) and the movable tube (22), an alarm (23) is fixedly installed on the outer ring surface of the movable tube (22) away from the fixed tube (21), slots (24) are provided on both ends of the fixed tube (21) and the movable tube (22) on the side close to the through hole, a perforated plate (25) is inserted into the interior of the slot (24), and two perforated plates (25) are provided, which are respectively located at the sides of the observation tube. At both ends, the perforated plates (25) are provided with circular holes for the injection main rod (14) and the injection head (15) to pass through at positions corresponding to the through holes, and annular films (26) are provided on the walls of the circular holes of the two perforated plates (25). An internal ring (27) is provided inside the movable cylinder (22), and the internal ring (27) is located on a side close to the injection head (15). A plurality of abutment shafts (28) are evenly inserted on the internal ring (27), and a spring (29) is fixedly connected between the outer walls of the plurality of abutment shafts (28) and the outer ring surface of the internal ring (27). A trigger switch (210) is fixedly installed at positions corresponding to the abutment shafts (28) on the internal cylinder walls of the fixed cylinder (21) and the movable cylinder (22).

2. The die-casting machine with an adjustable shot rod according to claim 1, characterized in that: The fixed cylinder (21) and the movable cylinder (22) are fixed by bolts and nuts, and both the fixed cylinder (21) and the movable cylinder (22) are made of transparent material.

3. The die-casting machine with an adjustable injection rod according to claim 1, characterized in that: There are two annular films (26) in total, and both are made of high-temperature rubber material. The inner diameter of the annular film (26) on the side close to the injection main rod body (14) is the same as the outer diameter of the injection main rod body (14), and the inner diameter of the annular film (26) on the side away from the injection main rod body (14) is the same as the outer diameter of the injection head (15).

4. The die-casting machine with an adjustable plunger according to claim 1, characterized in that: The plurality of abutment shafts (28) are distributed in a circular ring shape, and the ends of the plurality of abutment shafts (28) close to the injection head (15) are all hemispherical surfaces.

5. The die-casting machine with an adjustable injection rod according to claim 1, characterized in that: An active scraping mechanism is provided on a side of the movable cylinder (22) close to the injection head (15), the active scraping mechanism comprising a reciprocating screw (31) rotatably connected to the inner cylinder wall of the movable cylinder (22), the reciprocating screw (31) being located on a side of the injection head (15) close to the built-in ring (27), a sleeve (32) being sleeved on the outside of the reciprocating screw (31), the sleeve (32) being threadedly connected to the reciprocating screw (31), a displacement rod (33) being fixedly connected to the side of the sleeve (32) close to the injection head (15), a grooved plate (34) parallel to the reciprocating screw (31) being fixedly connected at a position of the inner cylinder wall of the movable cylinder (22) corresponding to the displacement rod (33), the grooved plate (34) A strip groove is provided on the movable cylinder (22), the displacement rod (33) is slidably connected in the strip groove, a scraper (35) is inserted into the end of the displacement rod (33) away from the collar (32), a small motor (36) is fixedly installed on the outer ring surface of the movable cylinder (22) at a position corresponding to the reciprocating screw rod (31), an output shaft of the small motor (36) passes through one end of the movable cylinder (22) and is fixedly connected to the top of the reciprocating screw rod (31), a through hole is opened at a position corresponding to the scraper (35) at the bottom of the movable cylinder (22), a collecting box (37) is inserted into the through hole opened on the movable cylinder (22), the collecting box (37) is located directly below the scraper (35), and the top of the collecting box (37) is open.

6. The die-casting machine with an adjustable injection rod according to claim 5, characterized in that: A pentagonal column is provided at the location where the displacement rod (33) and the scraper (35) are plugged together, and a pentagonal hole for plugging the pentagonal column is provided at a location corresponding to the scraper (35) and the pentagonal column, and the pentagonal column is tightly plugged into the pentagonal groove.

7. The die-casting machine with an adjustable injection rod according to claim 5, characterized in that: The scraper (35) is made of heat-resistant rubber material, and a surface of the scraper (35) on one side away from the injection head (15) is an inclined surface, and a surface of the scraper (35) on one side close to the injection head (15) is a flat surface.

8. The die-casting machine with an adjustable plunger according to claim 5, characterized in that: Two first magnetic sheets (371) are symmetrically fixedly connected to the outer surface of the collecting box (37) on one side close to the moving cylinder (22), and a second magnetic sheet (372) is fixedly connected to a position at the bottom of the moving cylinder (22) corresponding to the two first magnetic sheets (371), and the first magnetic sheet (371) and the second magnetic sheet (372) are made of opposite magnetic materials.

9. The die-casting machine with an adjustable plunger according to claim 5, characterized in that: The active scraping mechanism further comprises a matching component, wherein the matching component comprises a rod-belt disc (38) rotatably connected to the inner wall of the moving cylinder (22), the rod-belt disc (38) being located on a side away from the scraper (35), the rod-belt disc (38) being composed of a cam at the top and a rod body fixedly connected to the bottom of the cam, a pulley 1 (39) being fixedly connected to the outer ring surface of the rod body in the rod-belt disc (38), and a pulley 2 (310) being fixedly connected to the bottom of the reciprocating screw rod (31). ), a synchronous belt (311) is connected in transmission between the second pulley (310) and the first pulley (39), a limit ring (312) is fixedly connected to the inner cylinder wall of the movable cylinder (22), the limit ring (312) is located between the belt rod convex disc (38) and the scraper (35) when the two are located at the bottom, a T-shaped plate (313) is inserted in the center of the limit ring (312), and a second spring (314) is fixedly connected between the T-shaped plate (313) and the limit ring (312).

10. The die-casting machine with an adjustable ram according to claim 5, characterized in that: A linkage heat dissipation mechanism is provided inside the upper part of the movable cylinder (22), and the linkage heat dissipation mechanism comprises a top synchronous wheel 2 (45) fixedly connected to the reciprocating screw rod (31); a ventilation pipe (41) is fixedly connected to the middle part of the upper part of the movable cylinder (22); a filter screen (47) is inserted at the top of the ventilation pipe (41); a rotating shaft (42) is rotatably connected to the inner center of the ventilation pipe (41); a fan (43) is fixedly connected to the lower end of the rotating shaft (42); a synchronization wheel 1 (44) is fixedly connected to the outer ring surface of the fan (43); a transmission belt (46) is transmission-connected between the synchronization wheel 1 (44) and the synchronization wheel 2 (45).

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