Injection molding machine with injection molding nozzle protection mechanism

Abstract

The invention discloses an injection molding machine with an injection molding nozzle protection mechanism, and relates to the technical field of plastic injection molding, the injection molding machine comprises an injection molding machine, an extrusion port is arranged in the injection molding machine, one end of the extrusion port is fixedly connected with a nozzle, and the protection mechanism is arranged on the outer wall of the nozzle. The residual solution in the nozzle slides into the fixing sleeve along with the gap between the sealing cover and the fixing sleeve and finally flows out from the bottom of the fixing sleeve, so that the solution is discharged after injection molding is completed, and the problems that the solution in the nozzle is residual, molten plastic is not discharged in time and the injection molding quality is influenced are avoided. And the residual liquid of the nozzle is subjected to material thermal degradation to form hard sediments.

Description

Technical Field

[0001] The invention relates to the technical field of plastic injection molding, in particular to an injection molding machine with an injection molding nozzle protection mechanism. Background Art

[0002] Injection molding machine is also called injection molding machine or injection machine. It is the main molding equipment that uses plastic molding molds to make plastic products of various shapes from thermoplastics or thermosetting plastics. It is divided into vertical, horizontal and all-electric types. The injection molding machine can heat the plastic and apply high pressure to the molten plastic to make it eject and fill the mold.

[0003] An injection molding machine with an injection molding nozzle protection mechanism described in the patent application with announcement number CN114851474A includes an injection molding machine body, and a protection mechanism is arranged at one end of the nozzle of the injection molding machine body; the protection mechanism includes a vertical plate symmetrically arranged on the top of the injection molding machine body, a sliding rod arranged on the side wall of the vertical plate, a circular plate arranged at the end of the sliding rod, a slide plate slidably connected to the sliding rod at both ends, a spring sleeved on the sliding rod, an end cover arranged at the top of the slide plate and corresponding to the nozzle of the injection molding machine body, and a cleaning rod arranged at the center of the bottom wall inside the end cover; the spring is located between the circular plate and the slide plate. Through the vertical plate, sliding rod, circular plate, slide plate, spring, end cover and cleaning rod and other structures.

[0004] At present, after the injection molding machine is completed, if the residual molten plastic in the nozzle is not discharged in time, the harm of the residual liquid in the nozzle will cause thermal degradation of the material (especially obvious for heat-sensitive materials such as PVC / PC), and the temperature-sensitive material will have molecular chain breakage in the retention state, resulting in bubbles, yellowing and even carbonization. The degradation products will form hard deposits, causing local blockage of the nozzle flow channel. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides an injection molding machine with an injection molding nozzle protection mechanism, which achieves the purpose of solving the above-mentioned problems.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: an injection molding machine with an injection molding nozzle protection mechanism, comprising an injection molding machine, an extrusion port is arranged inside the injection molding machine, a nozzle is fixedly connected to one end of the extrusion port, and a protection mechanism is arranged on the outer wall of the nozzle; The protection agencies include: A sealing plate, the sealing plate is a circular plate-shaped structure, a sealing cover is fixedly connected to the bottom of the sealing plate, a connecting plate is fixedly connected to the bottom of the sealing cover, and the sealing plate is used to play a lifting role when pushed by pressure; The fixing sleeve is a circular sleeve-shaped structure, the outer wall of the fixing sleeve is fixedly connected with a connecting disk, the connecting disk is a circular ring-shaped structure, and the interior of the fixing sleeve is used to communicate with the interior of the nozzle.

[0007] Preferably, a spring is fixedly connected to the top of the connection disk, the top of the spring is fixedly connected to the bottom of the nozzle, and the spring is used to reset the connection disk and the fixing sleeve.

[0008] Preferably, a baffle is fixedly connected to the top of the connection disk, the top of the baffle is in contact with the bottom of the nozzle, and the baffle is used to limit the lifting and lowering of the fixing sleeve and the connection disk.

[0009] Preferably, a cooling mechanism is provided on the outer wall of the nozzle, and the cooling mechanism comprises a fixed cooling plate, and the fixed cooling plate is an arc-shaped strip structure, and the fixed cooling plate is fixedly connected to the top of the nozzle.

[0010] Preferably, an opening and closing heat dissipation plate is hinged on the top of the nozzle, an inner groove is provided at the bottom of the opening and closing heat dissipation plate, and an inner wall of the inner groove has the same shape as the fixed cooling plate.

[0011] Preferably, a heat dissipation groove is provided on the outer wall of the opening and closing heat dissipation plate, the fixed cooling plate serves to cool the nozzle, and the heat dissipation groove serves to cool the opening and closing heat dissipation plate.

[0012] Preferably, the outer wall of the opening and closing heat dissipation plate is hinged with a hinged plate, one end of the hinged plate is hinged to the outer wall of the baffle, one side of the opening and closing heat dissipation plate is fixedly connected to a rotating shaft, the outer wall of the rotating shaft is rotatably connected to a hinge block, and the bottom of the hinge block is fixedly connected to the top of the nozzle.

[0013] Preferably, an auxiliary mechanism is provided on the inner wall of the fixed sleeve, and the auxiliary mechanism includes an inclined rod, one end of the inclined rod is fixedly connected to a vertical rod, the bottom end of the vertical rod is fixedly connected to a horizontal plate, both ends of the outer wall of the horizontal plate are fixedly connected to vertical plates, and the top of the vertical plate is fixedly connected to the bottom of the nozzle.

[0014] The present invention provides an injection molding machine with an injection molding nozzle protection mechanism, which has the following beneficial effects: 1. The present invention provides a protection mechanism, and the residual solution in the nozzle at this time will slip into the interior of the fixed sleeve through the gap between the sealing cover and the fixed sleeve, and finally flow out through the bottom of the fixed sleeve, so that the solution can be released after the injection molding is completed, so as to avoid the problem that the residual solution in the nozzle is not discharged in time, resulting in thermal degradation of the residual liquid in the nozzle and the formation of hard deposits.

[0015] 2. The present invention sets a protection mechanism. When the nozzle is performing injection molding and stops injection molding after completion, the inside of the nozzle will automatically seal the nozzle due to the automatic lifting of the sealing plate. This can achieve automatic sealing during work without manual adjustment, and automatic material discharge after the work is completed, thereby reducing the workload of the staff and improving work efficiency.

[0016] 3. The present invention sets a cooling mechanism to fit the bottom of the opening and closing heat sink with the outer wall of the nozzle, thereby absorbing heat from the outer wall of the nozzle and dissipating heat outwards through the heat dissipation grooves on the outer wall of the opening and closing heat sink, thereby completing the heat conduction and heat dissipation work of the nozzle, avoiding the problem of high temperature aging of the nozzle seal due to the high temperature of the outer wall of the nozzle caused by the nozzle being at high temperature for a long time, and reducing its deformation.

[0017] 4. The present invention realizes a separate heat dissipation method by setting a cooling mechanism to quickly dissipate the absorbed high heat, and can make the nozzle and the opening and closing heat dissipation plate have a lower temperature, so that when the opening and closing heat dissipation plate is attached to the nozzle again, the heat of the nozzle can be quickly absorbed into the opening and closing heat dissipation plate again, so that during the continuous injection work, the separate heat dissipation method can be quickly utilized during the intermittent interval time, the heat dissipation efficiency can be improved, and the damage to the nozzle caused by the high temperature can be minimized.

[0018] 5. The present invention sets an auxiliary mechanism so that the inner wall of the fixed sleeve can move up and down relative to the outer walls of the vertical rod and the inclined rod, so that the inclined rod can move up and down on the inner wall of the fixed sleeve, so that the liquid inside the fixed sleeve is stirred to a certain extent, thereby preventing the problem that part of the liquid becomes viscous and sticks to it and is unable to fall, thereby ensuring the long-term working stability of the fixed sleeve and the smoothness of the flow of its solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a schematic diagram of the structure of the nozzle of the present invention; Figure 3 The structure of the protection mechanism of the present invention is shown in FIG. Figure 1 ; Figure 4 It is a schematic cross-sectional structure diagram of the protection mechanism of the present invention; Figure 5 The structure of the protection mechanism of the present invention is shown in FIG. Figure 2 ; Figure 6 The structural movement diagram of the protection mechanism of the present invention is shown in FIG. Figure 1 ; Figure 7 The structural movement diagram of the protection mechanism of the present invention is shown in FIG. Figure 2 ; Figure 8 For the present invention Figure 3 A magnified image of point A; Fig. 9 For the present invention Figure 3 The enlarged view of point B; Fig.10 For the present invention Figure 3 Enlarged view of point C; Fig.11 The schematic diagram of the structural movement of the cooling mechanism of the present invention is shown in FIG. Figure 1 ; Fig.12 The schematic diagram of the structural movement of the cooling mechanism of the present invention is shown in FIG. Figure 2 ; Fig.13 It is a structural schematic diagram of the auxiliary mechanism of the present invention.

[0020] In the figure: 1 injection molding machine, 2 extrusion outlet, 3 protection mechanism, 301 sealing plate, 302 sealing cover, 303 connecting plate, 304 fixing sleeve, 305 connecting plate, 306 spring, 307 baffle, 4 cooling mechanism, 401 fixed cooling plate, 402 opening and closing heat dissipation plate, 403 inner groove, 404 heat dissipation groove, 405 hinge plate, 406 rotating shaft, 407 hinge block, 5 auxiliary mechanism, 501 vertical plate, 502 horizontal plate, 503 vertical rod, 504 oblique rod, 6 nozzle. DETAILED DESCRIPTION

[0021] Example 1: Please refer to Figure 1-7 The present invention provides a technical solution: an injection molding machine with an injection molding nozzle protection mechanism, comprising an injection molding machine 1, an extrusion port 2 is arranged inside the injection molding machine 1, a nozzle 6 is fixedly connected to one end of the extrusion port 2, and a protection mechanism 3 is arranged on the outer wall of the nozzle 6; Protection agencies 3 include: The sealing plate 301 is a circular plate structure. The bottom of the sealing plate 301 is fixedly connected to a sealing cover 302. The bottom of the sealing cover 302 is fixedly connected to a connecting plate 303. The sealing plate 301 is used to play a lifting role when pushed by pressure; The fixing sleeve 304 is a circular sleeve-shaped structure. The outer wall of the fixing sleeve 304 is fixedly connected with a connecting disk 305 . The connecting disk 305 is a circular ring-shaped structure. The interior of the fixing sleeve 304 is used to communicate with the interior of the nozzle 6 .

[0022] A spring 306 is fixedly connected to the top of the connecting disk 305 , and the top of the spring 306 is fixedly connected to the bottom of the nozzle 6 . The spring 306 is used to reset the connecting disk 305 and the fixing sleeve 304 .

[0023] A baffle 307 is fixedly connected to the top of the connecting plate 305, and the top of the baffle 307 contacts the bottom of the nozzle 6. The baffle 307 is used to limit the lifting of the fixing sleeve 304 and the connecting plate 305. When in use, the hot melt liquid in the extrusion port 2 in the injection molding machine 1 is injected into the left mold through the nozzle 6 with pressure. When the hot melt liquid is injected, the pressure inside the extrusion port 2 and the nozzle 6 will increase rapidly. At this time, the sealing plate 301 in the nozzle 6 will be pushed down rapidly by the pressure. The sealing cover 302 and the connecting plate 303 at the bottom of the sealing plate 301 slide vertically down in the inner wall of the nozzle 6, and pull the spring 306 to deform through the connecting plate 305, and clamp the bottom of the inner wall of the nozzle 6 through the sealing plate 301, and push the gap between the sealing cover 302 and the fixing sleeve 304 to the outside of the nozzle 6, so that the inside of the nozzle 6 is automatically sealed; After the injection mold is completed, when the injection is stopped, the pressure on the extrusion port 2 and the inside of the nozzle 6 is lost. At this time, the inside of the nozzle 6 loses pressure, and the sealing plate 301 also loses the pressure inside the nozzle 6. As the connecting plate 305 is subjected to the rebound force of the spring 306, the connecting plate 305, the fixing sleeve 304, the connecting plate 303 and the sealing plate 301 are rebounded back to their original positions, thereby performing a vertical upward movement. At this time, after the sealing plate 301 and the sealing cover 302 rise, the gap between the sealing cover 302 and the fixing sleeve 304 will be opened, so that the remaining solution in the nozzle 6 at this time will slip into the inside of the fixing sleeve 304 through the gap between the sealing cover 302 and the fixing sleeve 304, and finally flow out through the bottom of the fixing sleeve 304, so that the solution is released after the injection molding is completed, so as to avoid the problem that the residual solution in the nozzle 6 is not discharged in time, and the residual liquid in the nozzle is thermally degraded and hard deposits are formed; At the same time, when the nozzle 6 is performing the injection molding work and the injection molding work is stopped after completion, the inside of the nozzle 6 will automatically seal the nozzle 6 due to the automatic lifting of the sealing plate 301, so that the sealing can be automatically achieved during the work without manual adjustment, and the working effect of automatic material discharge after the work is completed can be achieved, thereby reducing the workload of the staff and improving the work efficiency; Example 2: Please refer to Figure 1-12 On the basis of the first embodiment, the present invention provides a technical solution: a cooling mechanism 4 is provided on the outer wall of the nozzle 6, and the cooling mechanism 4 includes a fixed cooling plate 401, and the fixed cooling plate 401 is an arc-shaped strip structure, and the fixed cooling plate 401 is fixedly connected to the top of the nozzle 6.

[0024] An opening and closing heat dissipation plate 402 is hinged on the top of the nozzle 6 , and an inner groove 403 is formed at the bottom of the opening and closing heat dissipation plate 402 . The inner wall of the inner groove 403 has the same shape as the fixed cooling plate 401 .

[0025] The outer wall of the opening and closing heat dissipation plate 402 is provided with a heat dissipation groove 404 . The fixed cooling plate 401 cools the nozzle 6 , and the heat dissipation groove 404 cools the opening and closing heat dissipation plate 402 .

[0026] The outer wall of the opening and closing heat dissipation plate 402 is hinged with a hinge plate 405, one end of the hinge plate 405 is hinged with the outer wall of the baffle 307, one side of the opening and closing heat dissipation plate 402 is fixedly connected with a rotating shaft 406, the outer wall of the rotating shaft 406 is rotatably connected with a hinge block 407, and the bottom of the hinge block 407 is fixedly connected with the top of the nozzle 6; During the pressure injection molding, the sealing plate 301 and the fixing sleeve 304 descend, which will drive the baffle plate 307 to descend synchronously. The baffle plate 307 is used to limit the connection plate 305. At the same time, the baffle plate 307 abuts against the bottom of the nozzle 6 when it rises, and the hinged plate 405 is hinged to pull the opening and closing heat dissipation plate 402, so that the opening and closing heat dissipation plate 402 slides and rotates on the outer wall of the rotating shaft 406 and descends, so that the bottom of the opening and closing heat dissipation plate 402 is fitted with the outer wall of the nozzle 6, so as to complete the heat absorption of the outer wall of the nozzle 6, and dissipate the heat outward through the heat dissipation grooves 404 on the outer wall of the opening and closing heat dissipation plate 402, so as to complete the heat conduction and heat dissipation of the nozzle 6, avoid the problem of high temperature aging of the nozzle seal caused by the high temperature of the outer wall of the nozzle 6 due to the long-term high temperature of the nozzle 6, and reduce its deformation; After the injection molding is completed, the fixed sleeve 304 is lifted and the hinged plate 405 automatically pushes the opening and closing heat dissipation plate 402 up, so that the opening and closing heat dissipation plate 402 is separated from the contact with the nozzle 6 below. At this time, a large amount of heat on the opening and closing heat dissipation plate 402 is separated from the nozzle 6 and dissipated by itself, and the nozzle 6 also dissipates heat through the fixed cooling plate 401 on the outer wall, thereby realizing a separate heat dissipation method by itself, so as to quickly dissipate the absorbed high heat, so that the temperature of the nozzle 6 and the opening and closing heat dissipation plate 402 can be quickly dissipated. When the subsequent nozzle 6 continues to inject molding, the nozzle 6 and the opening and closing heat dissipation plate 402 can have a lower temperature. When the opening and closing heat dissipation plate 402 is attached to the nozzle 6 again, the heat of the nozzle 6 can be quickly absorbed into the opening and closing heat dissipation plate 402 again, so that in the continuous injection molding work, the intermediate interval time is used to quickly use the separate heat dissipation method, improve the heat dissipation efficiency, and minimize the damage to the nozzle 6 caused by its high temperature. Example 3: Please refer to Figure 1-13 On the basis of the first and second embodiments, the present invention provides a technical solution: an auxiliary mechanism 5 is provided on the inner wall of the fixed sleeve 304, the auxiliary mechanism 5 comprises an inclined rod 504, one end of the inclined rod 504 is fixedly connected to a vertical rod 503, the bottom end of the vertical rod 503 is fixedly connected to a horizontal plate 502, both ends of the outer wall of the horizontal plate 502 are fixedly connected to vertical plates 501, and the top of the vertical plate 501 is fixedly connected to the bottom of the nozzle 6; As the sealing plate 301 rises and falls, driving the fixed sleeve 304 below to rise and fall synchronously, the inner wall of the fixed sleeve 304 will move up and down relative to the outer wall of the vertical rod 503 and the inclined rod 504, so that the inclined rod 504 will move up and down on the inner wall of the fixed sleeve 304, so that the liquid in the fixed sleeve 304 is stirred to a certain extent, preventing the problem of some liquid becoming viscous and sticking and clogging and unable to fall, thereby ensuring the long-term working stability of the fixed sleeve 304 and the smoothness of the flow of its solution.

[0027] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An injection molding machine with an injection molding nozzle protection mechanism, comprising an injection molding machine (1), wherein an extrusion port (2) is arranged inside the injection molding machine (1), and characterized in that: One end of the extrusion port (2) is fixedly connected to a nozzle (6), and an outer wall of the nozzle (6) is provided with a protective mechanism (3); The protection mechanism (3) comprises: A sealing plate (301), the sealing plate (301) being a circular plate-shaped structure, a sealing cover (302) being fixedly connected to the bottom of the sealing plate (301), a connecting plate (303) being fixedly connected to the bottom of the sealing cover (302), and the sealing plate (301) being used to play a lifting role when pushed by pressure; A fixed sleeve (304), the fixed sleeve (304) being a circular sleeve-shaped structure, a connection disk (305) being fixedly connected to the outer wall of the fixed sleeve (304), the connection disk (305) being a circular ring-shaped structure, and the interior of the fixed sleeve (304) being used for communicating with the interior of the nozzle (6).

2. The injection molding machine with an injection nozzle protection mechanism according to claim 1, characterized in that: A spring (306) is fixedly connected to the top of the connection disk (305), and the top of the spring (306) is fixedly connected to the bottom of the nozzle (6). The spring (306) is used to reset the connection disk (305) and the fixing sleeve (304).

3. The injection molding machine with an injection nozzle protection mechanism according to claim 2, characterized in that: A baffle (307) is fixedly connected to the top of the connection disk (305), the top of the baffle (307) contacts the bottom of the nozzle (6), and the baffle (307) is used to limit the lifting and lowering of the fixing sleeve (304) and the connection disk (305).

4. The injection molding machine with an injection nozzle protection mechanism according to claim 3, characterized in that: The outer wall of the nozzle (6) is provided with a cooling mechanism (4), the cooling mechanism (4) comprising a fixed cooling plate (401), the fixed cooling plate (401) being an arc-shaped strip structure, the fixed cooling plate (401) being fixedly connected to the top of the nozzle (6).

5. The injection molding machine with an injection nozzle protection mechanism according to claim 4, characterized in that: An opening and closing heat dissipation plate (402) is hingedly connected to the top of the nozzle (6), an inner groove (403) is provided at the bottom of the opening and closing heat dissipation plate (402), and an inner wall of the inner groove (403) has the same shape as the fixed cooling plate (401).

6. The injection molding machine with an injection nozzle protection mechanism according to claim 5, characterized in that: The outer wall of the opening and closing heat dissipation plate (402) is provided with a heat dissipation groove (404); the fixed cooling plate (401) plays a role in cooling the nozzle (6); and the heat dissipation groove (404) plays a role in cooling the opening and closing heat dissipation plate (402).

7. An injection molding machine with an injection nozzle protection mechanism according to claim 6, characterized in that: The outer wall of the opening and closing heat dissipation plate (402) is hinged with a hinged plate (405), one end of the hinged plate (405) is hinged with the outer wall of the baffle (307), one side of the opening and closing heat dissipation plate (402) is fixedly connected with a rotating shaft (406), the outer wall of the rotating shaft (406) is rotatably connected with a hinge block (407), and the bottom of the hinge block (407) is fixedly connected to the top of the nozzle (6).

8. The injection molding machine with an injection molding nozzle protection mechanism according to claim 7, characterized in that: An auxiliary mechanism (5) is provided on the inner wall of the fixed sleeve (304), and the auxiliary mechanism (5) comprises an inclined rod (504), one end of the inclined rod (504) is fixedly connected to a vertical rod (503), the bottom end of the vertical rod (503) is fixedly connected to a horizontal plate (502), both ends of the outer wall of the horizontal plate (502) are fixedly connected to vertical plates (501), and the top of the vertical plate (501) is fixedly connected to the bottom of the nozzle (6).

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