Injection molding mechanism of injection molding machine

Abstract

The invention relates to an injection molding mechanism of an injection molding machine, and belongs to the technical field of injection molding machines, the injection molding mechanism comprises a power assembly, a mold closing assembly used for closing a mold to ensure that plastic is solidified and shaped in the mold, and an injection assembly used for heating and melting the plastic and injecting the plastic into the mold, the injection assembly comprises a pushing screw rod, a charging barrel and a first feeding hopper, the charging barrel is horizontally placed, one end of the charging barrel is used for being in butt joint with a mold, the pushing screw rod is arranged in the charging barrel, the power assembly is used for providing driving force for the pushing screw rod, a second feeding hopper is arranged on the charging barrel and located on the side, close to the mold closing assembly, of the first feeding hopper, and a vertical pipe and a second feeding auger are arranged in the second feeding hopper; the second feeding auger is wound and fixed on the vertical pipe, and the vertical pipe is located at the vertical center line of the second feeding hopper and is arranged in a self-rotation mode relative to the second feeding hopper; and a stirring assembly used for stirring materials is arranged in the second feeding hopper. The device has the effects that troubleshooting is convenient, and the downtime is shortened.

Description

Technical Field

[0001] The present application relates to the technical field of injection molding machines, and in particular to an injection molding mechanism of an injection molding machine. 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.

[0003] During the use of the injection molding machine, the stored material is first plasticized, and the plastic particles are quantitatively added into the barrel of the injection molding machine through the feed hopper. The heat transfer of the barrel and the shear friction generated by the rotation of the screw gradually melt the plastic into a viscous melt. Then, under the high pressure of the injection plug or the screw, it is pushed through the nozzle at the front end of the barrel and injected into the closed mold cavity. After cooling, it is demolded. In the process of injection molding, some additives or other raw materials are often added, such as plasticizers, which can increase the flexibility of plastics, and carbon fibers, which can enhance the strength of plastic products without increasing the weight too much.

[0004] In the actual production process, quality problems may occur during the injection molding process due to problems with the plastic itself or the additives, such as product color deviation or defects caused by fiber agglomeration on the product surface. It is necessary to troubleshoot the process of adding raw materials and additives, with a focus on checking whether the mixing is uniform. Since the raw materials and additives are added to the barrel through the same feed hopper, the entire machine will be shut down if troubleshooting is required, which makes troubleshooting inconvenient. Summary of the invention

[0005] In order to facilitate troubleshooting and reduce downtime, the present application provides an injection molding mechanism of an injection molding machine.

[0006] The injection molding mechanism of an injection molding machine provided in this application adopts the following technical solution: An injection molding mechanism of an injection molding machine includes a power component, a clamping component for closing the mold to ensure that the plastic is solidified and shaped in the mold, and an injection component for heating and melting the plastic and injecting it into the mold. The injection component includes a push screw, a barrel and a first feed hopper. The barrel is placed horizontally and one end is used to dock with the mold. The push screw is arranged in the barrel. The power component is used to provide driving force for the push screw. A second feed hopper is arranged on the barrel. The second feed hopper is located on the side of the first feed hopper close to the clamping component. A vertical pipe and a second feed auger are arranged in the second feed hopper. The second feed auger is wound and fixed on the vertical pipe. The vertical pipe is located at the vertical center line of the second feed hopper. The vertical pipe is arranged to rotate relative to the second feed hopper. A stirring component for stirring the material is arranged in the second feed hopper.

[0007] By adopting the above technical solution, plastic raw materials are added at the first feed hopper, and fibers are added at the second feed hopper. The vertical pipe cooperates with the second feed auger to convey the materials in the second feed hopper while stirring them. At the same time, the stirring component is used to fully stir the materials in the second feed hopper to avoid fiber agglomeration. Through the two feed hoppers, it is easier to determine which material addition link has a problem. If it is a problem with fiber addition, the second feed hopper and its related stirring components can be checked in particular; if it is a problem with the plastic raw material itself, the first feed hopper should be checked in particular. This isolated inspection method is more convenient and faster than adding all materials in one feed hopper, which helps to promptly discover and solve problems and reduce equipment downtime.

[0008] Optionally, the stirring assembly includes a cross bar, an inclined bar, a driving motor, a fixed gear and a fixed gear ring. One end of the cross bar is rotatably connected to the vertical tube and the rotating axis is the center line of the cross bar itself. The other end of the cross bar is fixedly connected to one end of the inclined bar. There is an angle between the inclined bar and the cross bar. The driving motor is fixed on the second feed hopper, and the output end of the driving motor is fixedly connected to the fixed gear. The fixed gear ring is fixed on the outer wall of the vertical tube, and the fixed gear is meshed with the fixed gear ring.

[0009] By adopting the above technical solution, the setting of the horizontal rod and the diagonal rod increases the contact area between the stirring assembly and the material, ensuring the uniformity of the material stirring. The drive motor provides power for the rotation of the vertical pipe. When the drive motor is started, the vertical pipe is finally rotated through the meshing of the fixed gear and the fixed gear ring, and the vertical pipe drives the horizontal rod and the diagonal rod to rotate to complete the stirring of the material.

[0010] Optionally, the vertical tube is provided with a positioning rod, a partition plate and a plug column, the partition plate is fixed inside the vertical tube and is located below the intersection of the cross bar and the vertical tube, the partition plate blocks the internal passage of the vertical tube, the center line of the positioning rod coincides with the center line of the vertical tube, the positioning rod passes through the center of the plug column, the cross section of the positioning rod is non-circular, the plug column is slidably set on the positioning rod and slides along the length direction of the positioning rod, the circumferential side wall of the plug column is threadedly connected to the inner wall of the vertical tube, and the positioning rod is provided with a limit pin for controlling whether the positioning rod rotates synchronously with the vertical tube; an injection port is opened on the side wall of the vertical tube, and a liquid outlet hole is opened on the cross bar, and a liquid outlet passage is formed from the injection port along the inside of the vertical tube, the cross bar and the inclined rod to the liquid outlet hole.

[0011] By adopting the above technical solution, when it is necessary to add liquid additives, the liquid additives are injected into the vertical tube through the injection port. At this time, the plug stays above the injection port. When the additive is injected, the drive motor is started, and the drive motor starts to drive the vertical tube to rotate. Since the plug is threadedly connected to the inner wall of the vertical tube, the plug has a tendency to rotate. Since the cross-section of the positioning rod is non-circular, the positioning rod limits the plug so that the plug cannot rotate. Finally, the plug moves along the length direction of the vertical tube. At this time, the plug moves toward the direction close to the partition plate, compressing the space between the plug and the partition plate. The liquid additive is sprayed onto the material inside the second feed hopper through the liquid outlet passage under pressure. At the same time, the material in the second feed hopper is also stirred by the horizontal rod and the inclined rod. The two actions are performed simultaneously to achieve full mixing of the additive and the material.

[0012] Optionally, a bevel gear is fixed to the end of the positioning rod close to the partition plate, the rotation connection between the cross bar and the vertical pipe penetrates into the vertical pipe and a bevel gear ring is fixed to the outer wall ring, and the bevel gear and the bevel gear ring are meshed.

[0013] By adopting the above technical solution, the vertical tube rotates, but the positioning rod does not rotate, and the bevel gear starts to move relative to the bevel gear ring. However, since the bevel gear and the bevel gear ring are in meshing state, the bevel gear realizes passive rotation. At this time, the cross bar starts to rotate, and the cross bar drives the diagonal rod to start rotating. The final state is: the vertical tube drives the cross bar and the diagonal rod to start rotating with the vertical center line of the vertical tube as the rotation axis, and at the same time, the cross bar drives the diagonal rod to rotate relative to the vertical tube with the horizontal center line of the cross bar as the rotation axis, realizing multi-directional rotation, so that the liquid additive is sprayed from the end of the diagonal rod and quickly mixed with materials in multiple directions.

[0014] Optionally, the pushing screw is a corrugated screw.

[0015] By adopting the above technical solution, the corrugated screw can make the material undergo frequent compression, shearing and relaxation during the conveying process due to the waveform change of its flow channel cross-sectional shape or area size, which promotes the mixing and plasticization of the material. However, this mixing effect of the corrugated screw is mainly based on its own structural characteristics, which improves the mixing effect of the material.

[0016] Optionally, a frame plate is fixed on the top of the second feed hopper, and a vertical pipe passes through the frame plate and is rotatably connected to the frame plate, and the vertical pipe rotates relative to the frame plate along its own vertical center line.

[0017] By adopting the above technical solution, the setting of the frame plate provides an installation position for the vertical pipe.

[0018] Optionally, a protection box is fixed on the frame plate, the driving motor is fixed inside the protection box, the vertical pipe passes through the protection box, and the fixed gear and the fixed gear ring are both located inside the protection box.

[0019] By adopting the above technical solution, the protective box protects the meshing points of the drive motor, the fixed gear and the fixed gear ring, preventing the material in the second feed hopper from affecting the rotation of the drive motor and the meshing smoothness of the fixed gear and the fixed gear ring.

[0020] Optionally, a ring hole is provided at one end of the limit pin, and the ring hole is used for one end of the limit pin to be looped on the positioning rod and fit with the outer wall of the positioning rod, and the frame plate is provided with a socket for inserting the end of the limit pin.

[0021] By adopting the above technical solution, the opening of the ring hole makes it easy for one end of the limit pin to be looped on the positioning rod, and the other end of the limit pin is inserted into the insertion hole. At this time, the limit pin has a limiting effect on the positioning rod, so that the positioning rod is in a stationary state relative to the vertical pipe.

[0022] Optionally, two of the cross bars and two of the diagonal bars are provided, and when the end of one cross bar away from the diagonal bar is facing upward, the end of the other cross bar away from the diagonal bar is facing downward.

[0023] By adopting the above technical solution and placing the additives at different angles, the additives are sprayed at different heights through the ends of the two inclined rods, thereby increasing the mixing speed of the additives and the material.

[0024] Optionally, the liquid outlet is located at the end of the inclined rod away from the cross rod.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. Two feed hoppers can make it easier to determine which material addition process has a problem. If it is a problem with fiber addition, you can focus on checking the second feed hopper and its related stirring components; if it is a problem with the plastic raw material itself, mainly check the first feed hopper. This isolated inspection method is more convenient and faster than adding all materials to one feed hopper, which helps to find and solve problems in a timely manner and reduce equipment downtime; 2. The setting of the positioning rod, plug, partition plate and limit pin allows the liquid additive to be added to the material with pressure, which accelerates the mixing of the additive and the material; 3. The subsequent setting of the bevel gear ring and the bevel gear produces the following effect: the vertical tube drives the horizontal rod and the inclined rod to start rotating with the vertical center line of the vertical tube as the rotation axis, and at the same time the horizontal rod drives the inclined rod to rotate relative to the vertical tube with the horizontal center line of the horizontal rod as the rotation axis, thereby realizing multi-directional rotation, so that the liquid additive is sprayed out from the end of the inclined rod and quickly mixed with the materials in multiple directions. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application; Figure 2 is a vertical structural cross-sectional view of an embodiment of the present application; Figure 3It is a partial structural cross-sectional view of the second feed hopper.

[0027] In the figure, 1. power assembly; 2. mold clamping assembly; 3. injection assembly; 31. push screw; 32. barrel; 33. first feed hopper; 331. first feed auger; 4. second feed hopper; 41. vertical pipe; 411. positioning rod; 412. partition plate; 413. plug; 414. injection port; 415. liquid outlet; 416. bevel gear; 417. bevel gear ring; 42. second feed auger; 5. stirring assembly; 51. drive motor; 52. fixed gear; 53. fixed gear ring; 54. cross bar; 55. oblique bar; 6. limit pin; 61. ring hole; 7. frame plate; 71. protective box; 72. socket. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-Figure 3 This application is described in further detail.

[0029] The embodiment of the present application discloses an injection molding mechanism of an injection molding machine.

[0030] refer to Figure 1 and Figure 2 An injection molding mechanism of an injection molding machine includes a power component 1, a clamping component 2 and an injection component 3. The injection component 3 includes a push screw 31, a barrel 32 and a first feed hopper 33. The barrel 32 is placed horizontally, one end of the barrel 32 is connected to the mold of the clamping component 2, and the other end is connected to the power component 1. The power component 1 provides driving force for the push screw 31.

[0031] The function of the power assembly 1 is to provide power for various actions required by the injection molding machine according to the process, and to meet the pressure, speed, temperature and other requirements of various parts of the injection molding machine. It is mainly composed of various hydraulic components and hydraulic auxiliary components, among which the oil pump and the motor are the power sources of the injection molding machine, and various valves control the oil pressure and flow, so as to meet the various requirements of the injection molding process. It is a prior art and will not be described in detail. The function of the clamping assembly 2 is to ensure the closing, opening and ejection of the mold. At the same time, after the mold is closed, sufficient clamping force is supplied to the mold to resist the mold cavity pressure generated by the molten plastic entering the mold cavity, to prevent the mold from opening and causing the poor status of the product. The clamping assembly 2 is mainly composed of a clamping device, a machine twist, a mold adjustment mechanism, an ejection mechanism, a front and rear fixed template, a movable template, a clamping oil cylinder and a safety protection mechanism. It is a prior art and will not be described in detail.

[0032] refer to Figure 2 and Figure 3The push screw 31 is located in the barrel 32, and the push screw 31 is a corrugated screw. The barrel 32 is also provided with a second feed hopper 4, and the first feed hopper 33 and the second feed hopper 4 are arranged adjacent to each other, and the bottom of the first feed hopper 33 and the bottom of the second feed hopper 4 are both connected to the inside of the barrel 32. The first feed hopper 33 is closer to the power assembly 1 than the second feed hopper 4, and a first feed auger 331 is arranged in the first feed hopper 33, and the first feed auger 331 is rotatably arranged in the first feed hopper 33 and rotates relative to the first feed hopper 33, and the plastic raw material is transported to the barrel 32 while being stirred by the first feed auger 331.

[0033] refer to Figure 3 The second feed hopper 4 is provided with a frame plate 7, a vertical pipe 41, a second feed auger 42 and a stirring assembly 5. The frame plate 7 is fixed on the top of the second feed hopper 4. The vertical pipe 41 passes through the frame plate 7. The vertical center line of the vertical pipe 41 coincides with the vertical center line of the second feed hopper 4. The vertical pipe 41 is rotatably connected to the frame plate 7 and the rotation axis coincides with the vertical center line of the vertical pipe 41 itself. The vertical pipe 41 rotates relative to the second feed hopper 4. The second feed auger 42 is fixed on the vertical pipe 41 in an annular sleeve.

[0034] refer to Figure 3 The stirring assembly 5 includes a crossbar 54, an inclined rod 55, a fixed gear 52, a fixed gear ring 53 and a driving motor 51. A protection box 71 is provided on the frame plate 7. The protection box 71 is fixed on the frame plate 7 and penetrated by the vertical tube 41. The driving motor 51, the fixed gear ring 53 and the fixed gear 52 are all located in the protection box 71. The driving motor 51 is fixed in the protection box 71. The fixed gear 52 is fixedly connected to the output end of the driving motor 51. The fixed gear ring 53 is fixed on the outer wall of the vertical tube 41. The fixed gear 52 and the fixed gear ring 53 are meshed. The crossbar 54 is arranged horizontally, one end of the crossbar 54 penetrates into the vertical tube 41 and is rotatably connected with the vertical tube 41. The crossbar 54 rotates relative to the vertical tube 41 with its own center line as the rotation axis. The end of the crossbar 54 away from the vertical tube 41 is fixedly connected to one end of the inclined rod 55. There is an angle between the inclined rod 55 and the crossbar 54. In this embodiment, the inclined rod 55 and the crossbar 54 are arranged vertically, and the angle is ninety degrees. The interior of the cross bar 54, the inclined bar 55 and the vertical tube 41 are all hollow. A liquid outlet hole 415 is provided at the end of the inclined bar 55 away from the cross bar 54, and an injection port 414 is provided on the vertical tube 41. The injection port 414 is located near the top of the vertical tube 41 and is at a distance from the top of the vertical tube 41. Starting from the injection port 414, along the vertical tube 41, the cross bar 54 and the inclined bar 55, a liquid outlet passage is formed all the way to the liquid outlet hole 415.

[0035] refer to Figure 3, the vertical tube 41 is provided with a positioning rod 411, a stop pin 6, a partition plate 412 and a plug 413. The partition plate 412 is fixed inside the vertical tube 41 to partition the upper and lower spaces inside the vertical tube 41. The partition plate 412 is located below the intersection of the cross bar 54 and the vertical tube 41. The circumferential outer wall of the plug 413 is threadedly connected to the inner wall of the vertical tube 41. The bottom end of the positioning rod 411 penetrates into the vertical tube 41 and passes through the center of the plug 413. The top of the positioning rod 411 is located outside the vertical tube 41. The cross section of the positioning rod 411 is non-circular, and in this embodiment, it is rectangular. The plug 413 slides along the length direction of the positioning rod 411. A bevel gear 416 is fixed to the bottom end of the positioning rod 411. A bevel gear ring 417 is fixed at one end of the cross bar 54 that penetrates into the vertical tube 41. The bevel gear ring 417 is fixed on the circumferential outer wall of the cross bar 54, and the bevel gear ring 417 is meshed with the bevel gear 416.

[0036] refer to Figure 3 The stop pin 6 has a ring hole 61 at one end, and the stop pin 6 is sleeved on the positioning rod 411 and fits against the outer wall of the positioning rod 411, that is, the top of the positioning rod 411 is inserted into the ring hole 61. The frame plate 7 has an insertion hole 72, and the end of the stop pin 6 away from the positioning rod 411 is inserted into the insertion hole 72. When the stop pin 6 needs to cancel the limit on the positioning rod 411, the stop pin 6 can be directly pulled up.

[0037] refer to Figure 3 There are two cross bars 54 and two diagonal bars 55 , and when the end of one cross bar 54 away from the diagonal bar 55 is facing upward, the end of the other cross bar 54 away from the diagonal bar 55 is facing downward.

[0038] The implementation principle of the injection molding mechanism of an injection molding machine in the embodiment of the present application is as follows: plastic raw materials are added to the first feed hopper 33, and fibers are added to the second feed hopper 4. The vertical pipe 41 cooperates with the second feed auger 42 to convey the materials in the second feed hopper 4 while stirring them. At the same time, the stirring component 5 cooperates to fully stir the materials in the second feed hopper 4 to avoid fiber agglomeration. When liquid additives need to be added, the liquid additives are injected into the vertical pipe 41 through the injection port 414. At this time, the plug 413 stays above the injection port 414. When the additives are injected, the limit pin 6 is placed and the start The drive motor 51 is started, and the drive motor 51 starts to drive the vertical tube 41 to rotate. The positioning rod 411 limits the plug 413, so that the plug 413 cannot rotate. Finally, the plug 413 moves along the length direction of the vertical tube 41. At this time, the plug 413 moves in the direction close to the partition plate 412, compressing the space between the plug 413 and the partition plate 412. The liquid additive is sprayed on the material inside the second feed hopper 4 through the liquid outlet passage under pressure. At the same time, the material in the second feed hopper 4 is also stirred by the cross bar 54 and the inclined rod 55. The two actions are carried out simultaneously to achieve a full mixing of the additive and the material. Through the two feed hoppers, it is easier to determine which material addition link has a problem. If it is a problem with fiber addition, the second feed hopper 4 and its related stirring assembly 5 can be checked in particular; if it is a problem with the plastic raw material itself, the first feed hopper 33 should be checked in particular. This isolated inspection method is more convenient and faster than adding all materials and additives in one feed hopper, which helps to find and solve problems in a timely manner and reduce equipment downtime.

[0039] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An injection molding mechanism of an injection molding machine, comprising a power assembly (1), a mold clamping assembly (2) for closing a mold to ensure that plastic is solidified and shaped in the mold, and an injection assembly (3) for heating and melting the plastic and injecting it into the mold, wherein the injection assembly (3) comprises a push screw (31), a barrel (32) and a first feed hopper (33), wherein the barrel (32) is placed horizontally and one end of the barrel is used to dock with the mold, and the push screw (31) is arranged in the barrel (32). The power assembly (1) is used to provide driving force for the push screw (31), and is characterized in that: The barrel (32) is provided with a second feed hopper (4), the second feed hopper (4) being located on a side of the first feed hopper (33) close to the clamping assembly (2), the second feed hopper (4) being provided with a vertical pipe (41) and a second feed auger (42), the second feed auger (42) being wound and fixed on the vertical pipe (41), the vertical pipe (41) being located at the vertical center line of the second feed hopper (4), and the vertical pipe (41) being arranged to rotate relative to the second feed hopper (4); the second feed hopper (4) being provided with a stirring assembly (5) for stirring the material.

2. The injection molding mechanism of an injection molding machine according to claim 1, characterized in that: The stirring assembly (5) comprises a cross bar (54), an inclined bar (55), a driving motor (51), a fixed gear (52) and a fixed gear ring (53); one end of the cross bar (54) is rotatably connected to the vertical tube (41), and the rotation axis is the center line of the cross bar (54); the other end of the cross bar (54) is fixedly connected to one end of the inclined bar (55); an angle is formed between the inclined bar (55) and the cross bar (54); the driving motor (51) is fixed to the second feed hopper (4); the output end of the driving motor (51) is fixedly connected to the fixed gear (52); the fixed gear ring (53) is fixedly sleeved on the outer wall of the vertical tube (41); and the fixed gear (52) is meshed with the fixed gear ring (53).

3. The injection molding mechanism of an injection molding machine according to claim 2, characterized in that: The vertical tube (41) is provided with a positioning rod (411), a partition plate (412) and a plug column (413); the partition plate (412) is fixed inside the vertical tube (41) and is located below the intersection of the cross bar (54) and the vertical tube (41); the partition plate (412) blocks the internal passage of the vertical tube (41); the center line of the positioning rod (411) coincides with the center line of the vertical tube (41); the positioning rod (411) passes through the center of the plug column (413); the cross section of the positioning rod (411) is non-circular; the plug column (413) is slidably arranged on the positioning rod (411) The vertical tube (41) is provided with a stopper pin (6) for controlling whether the positioning rod (411) rotates synchronously with the vertical tube (41). The vertical tube (41) is provided with an injection port (414) on the side wall, and the cross bar (54) is provided with a liquid outlet hole (415). A liquid outlet passage is formed from the injection port (414) along the interior of the vertical tube (41), the cross bar (54) and the inclined bar (55) to the liquid outlet hole (415).

4. The injection molding mechanism of an injection molding machine according to claim 3, characterized in that: A bevel gear (416) is fixed to the end of the positioning rod (411) close to the partition plate (412); a rotational connection between the cross rod (54) and the vertical tube (41) extends deep into the vertical tube (41) and a bevel gear ring (417) is fixed to the outer wall ring sleeve; the bevel gear (416) and the bevel gear ring (417) are meshed.

5. The injection molding mechanism of an injection molding machine according to claim 1, characterized in that: The pushing screw (31) is a corrugated screw.

6. The injection molding mechanism of an injection molding machine according to claim 3, characterized in that: A frame plate (7) is fixed on the top of the second feed hopper (4), and a vertical pipe (41) passes through the frame plate (7) and is rotatably connected to the frame plate (7). The vertical pipe (41) rotates relative to the frame plate (7) along its own vertical center line.

7. The injection molding mechanism of an injection molding machine according to claim 6, characterized in that: A protection box (71) is fixed on the frame plate (7), the drive motor (51) is fixed inside the protection box (71), the vertical pipe (41) passes through the protection box (71), and the fixed gear (52) and the fixed gear ring (53) are both located inside the protection box (71).

8. The injection molding mechanism of an injection molding machine according to claim 6, characterized in that: A ring hole (61) is formed at one end of the limit pin (6), and the ring hole (61) is used for one end of the limit pin (6) to be sleeved on the positioning rod (411) and to fit with the outer wall of the positioning rod (411). The frame plate (7) is provided with a socket (72) for inserting the end of the limit pin (6).

9. The injection molding mechanism of an injection molding machine according to claim 3, characterized in that: Two of the cross bars (54) and the diagonal bars (55) are provided, and when the end of one cross bar (54) away from the diagonal bar (55) faces upward, the end of the other cross bar (54) away from the diagonal bar (55) faces downward.

10. The injection molding mechanism of an injection molding machine according to claim 9, characterized in that: The liquid outlet hole (415) is located at the end of the inclined rod (55) away from the cross rod (54).

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