Device capable of adjusting injection speed of injection molding equipment

Abstract

The invention belongs to the technical field of plastic processing and molding, and discloses a device capable of adjusting the injection speed of injection molding equipment, the device comprises a feeding pipe, a heating lantern ring used for melting injection molding raw materials in the pipe is mounted on the outer surface of the feeding pipe, and the front end of the feeding pipe is communicated with a nozzle; according to the device capable of adjusting the injection speed of the injection molding equipment, solid-liquid separation is carried out on the injection raw materials through the filtering assembly, foreign matter in the raw materials is effectively removed, the nozzle is prevented from being blocked, the production efficiency is improved, and the injection speed of the injection molding equipment can be adjusted. The driving assembly can drive the flow limiting assembly to stretch and retract, so that the injection speed is accurately adjusted, the injection device is made to adapt to the use requirements of different working conditions, meanwhile, the self-cleaning assembly is driven by the driving assembly to conduct cleaning work, the comprehensiveness and multifunctionality of the device are further improved, and efficient and stable operation of the whole injection process is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of plastic processing and molding, and specifically relates to a device for adjusting the injection speed of an injection molding device. Background Art

[0002] An injection molding device is an industrial device that melts plastic raw materials by heating and then injects them into a mold cavity to form products with specific shapes through cooling and solidification. Its core processes include plasticization, injection, holding pressure, and demolding. It is an indispensable key device in modern manufacturing. Its high efficiency, precision, and flexibility make it occupy an important position in the field of plastic processing.

[0003] In the injection molding process, the precise control of the material injection speed directly affects the product molding quality and production efficiency. Traditional injection devices mostly adopt a single feeding structure combined with a fixed-speed motor drive, which has problems such as a narrow speed adjustment range and a lag in dynamic response, and it is difficult to adapt to the requirements of complex process parameters. Especially in the process of forming high-precision or special-shaped parts, traditional devices are prone to product defects due to feeding fluctuations, and the cleaning of residues in the feeding pipe depends on manual disassembly, significantly increasing the downtime maintenance cost. Although there are some adjustable speed solutions in the prior art, most of them are adjusted from the drive source, and the nozzles in traditional molding devices all have fixed apertures and cannot dynamically adapt to the process requirements, thus restricting the improvement of the overall efficiency of the device. Summary of the Invention

[0004] The purpose of the present invention is to provide a device for adjusting the injection speed of an injection molding device, which solves the problems presented in the background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A device for adjusting the injection speed of an injection molding device, including a feeding pipe, an outer surface of the feeding pipe is provided with a heating collar for melting the injection molding raw material inside the pipe, a nozzle is connected to the front end of the feeding pipe, a filtering assembly for solid-liquid separation of the injection raw material is installed inside the feeding pipe near the nozzle, an adjusting mechanism for adjusting the injection speed is installed inside the nozzle, a self-cleaning assembly for cleaning the inner wall of the nozzle driven by the adjusting mechanism is installed inside the nozzle, and a recycling assembly for recycling and reusing the excess pressure inside the nozzle is installed on the top of the nozzle.

[0006] Preferably, the filtering assembly includes a mounting ring, both ends of the outer wall of the mounting ring are equidistantly provided with a plurality of mounting holes with the center of the mounting ring as the axis, the mounting ring is fixedly installed inside the front end of the feeding pipe near the nozzle through the mounting holes, a filter plate is fixedly connected to the middle of the inner wall of the mounting ring, and a plurality of filter holes are annularly distributed on the outer wall of the filter plate with the center of the filter plate as the axis.

[0007] Preferably, the adjusting mechanism includes a driving component and a current limiting component. The driving component includes a motor, which is installed on the top of the nozzle. The output end of the motor is fixedly connected with a first bevel gear. The top end of the nozzle is rotatably connected with a second bevel gear. The first bevel gear and the second bevel gear are meshed. The middle of the outer wall of the second bevel gear is fixedly connected with a support column. The bottom of the support column is rotatably connected to the inner bottom wall of the nozzle. The middle of the outer wall of the support column is fixedly connected with a third bevel gear with an installation direction opposite to that of the second bevel gear. The outer wall of the third bevel gear is meshed with a fourth bevel gear.

[0008] Preferably, the current limiting component includes a fixed disk, which is installed on the front side of the fourth bevel gear. A plurality of first sliding grooves are equidistantly arranged on the outer wall of the fixed disk with the center of the fixed disk as the axis. A plurality of cavities are equidistantly arranged on the outer surface of the fixed disk. The cavities are communicated with the first sliding grooves. A fixed rod is slidably connected to the inner wall of the cavity. The rear end of the outer wall of the fixed rod is fixedly connected with a positioning rod, which is slidably connected to the inner wall of the first sliding groove. The top end of the fixed rod is fixedly connected with a current limiting disk. The rear end of the outer wall of the fixed disk is rotatably connected with an external disk. A plurality of second sliding grooves with the same number as the first sliding grooves are annularly arranged on the outer surface of the external disk with the center of the external disk as the axis. The second sliding grooves are arc-shaped and are adapted to the size of the fixed rod. The end of the fixed rod extends to the outside of the second sliding groove. The rear end of the outer wall of the external disk is fixedly connected with a first connecting rod, and the end of the first connecting rod is fixedly connected to the outer wall of the fourth bevel gear.

[0009] Preferably, the self-cleaning component includes a second connecting rod, which penetrates the fixed disk and is fixedly connected to the front end of the outer wall of the first connecting rod. A plurality of third connecting rods are equidistantly fixedly connected to the outer wall of the second connecting rod, and the ends of the third connecting rods are fixedly connected with cleaning plates.

[0010] Preferably, the recycling component includes a pressure relief pipe communicated with the nozzle. The end of the pressure relief pipe is fixedly connected with a conical pipe, and the conical pipe is communicated with the top end of the filter plate. A pressure valve for controlling the opening of the pressure relief pipe is installed at the front end of the pressure relief pipe.

[0011] Preferably, a one-way valve for controlling the one-way flow of pressure is installed at the top end of the pressure relief pipe. A support rod is fixedly connected to the rear end of the inner top wall of the pressure relief pipe, and a piston is slidably connected to the outer wall of the support rod.

[0012] Preferably, an external ball head is installed outside the third bevel gear and the fourth bevel gear. The external ball head is fixedly installed on the outer wall of the support column, and the first connecting rod is rotatably connected to the outer wall of the external ball head.

[0013] Preferably, a first communication groove is formed in the inner wall of the filter plate and is distributed in an annular array with the center of the filter plate as the axis. The first communication groove connects the annularly distributed filter holes. A second communication groove is formed in the front side of the inner top of the filter plate, and the second communication groove connects a plurality of first communication grooves.

[0014] Preferably, the cleaning plate and the front end inner wall of the nozzle are adapted to each other.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. The present invention drives the flow-limiting component through the driving component to adjust the discharging space inside the nozzle, thereby realizing stepless adjustment of the injection speed through mechanical linkage, overcoming the defect that the traditional nozzle with a fixed aperture cannot dynamically adapt to the process requirements.

[0017] 2. The present invention separates solid and liquid of the raw material to be injected through the filtering component, thereby removing foreign matters in the raw material, such as metal chips and unmelted particles, etc., ensuring the purity of the raw material entering the nozzle, and avoiding nozzle blockage at the same time.

[0018] 3. The present invention is linked with the compressed air through the reuse component. When the pressure in the nozzle is too high, the relief air flow is used to reversely flush the filter holes or the feeding port of the injection device, thereby avoiding blockage of the filter plate or the feeding port of the injection device by solid materials. By using the excess pressure, the relief and cleaning effects are achieved at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the present invention;

[0020] Figure 2 is a schematic sectional structural diagram of the present invention;

[0021] Figure 3 is Figure 2 the enlarged structural diagram at A in

[0022] Figure 4 is a schematic partial disassembled structural diagram of the present invention;

[0023] Figure 5 is a schematic partial exploded structural diagram of the present invention;

[0024] Figure 6 is a schematic disassembled structural diagram of the filtering component of the present invention.

[0025] In the figure: 1, feeding pipe; 2, heating collar; 3, nozzle; 4, mounting ring; 41, mounting hole; 42, filter plate; 43, filter hole; 5, motor; 51, first bevel gear; 52, second bevel gear; 53, support column; 54, third bevel gear; 55, fourth bevel gear; 6, fixed disk; 61, cavity; 62, first chute; 63, fixed rod; 64, flow-limiting disk; 65, positioning rod; 66, external disk; 67, second chute; 68, first connecting rod; 7, second connecting rod; 71, third connecting rod; 72, cleaning plate; 8, pressure relief pipe; 81, tapered pipe; 82, pressure valve; 83, check valve; 84, support rod; 85, piston; 9, external ball head; 10, first communication groove; 11, second communication groove. Detailed implementation mode

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0027] As Figures 1 to 6 shown, the present invention provides a device for adjusting the injection speed of an injection molding device, including a feeding pipe 1. A heating collar 2 for melting the injection molding raw material in the pipe is installed on the outer surface of the feeding pipe 1. The front end of the feeding pipe 1 is connected to a nozzle 3. A filtering assembly for solid-liquid separation of the injection raw material is installed inside the feeding pipe 1 near the nozzle 3. An adjusting mechanism for adjusting the injection speed is installed inside the nozzle 3. A self-cleaning assembly for cleaning the inner wall of the nozzle 3 driven by the adjusting mechanism is installed inside the nozzle 3. A recycling assembly for recycling and reusing the excess pressure inside the nozzle 3 is installed on the top of the nozzle 3. The feeding pipe 1 is connected to the feeding port of the screw feeder. The raw material is melted by the heating collar 2 to ensure the melting operation of the material. At the same time, the device is used in cooperation with multiple components. At the same time, the self-cleaning assembly and the flow-limiting assembly both work through the driving assembly to ensure the versatility of the device.

[0028] As Figure 1 、 Figure 2 and Figure 4As shown in the figure, the filtering component includes an installation ring 4. At both ends of the outer wall of the installation ring 4, a plurality of installation holes 41 are equidistantly arranged with the center of the installation ring 4 as the axis. The installation ring 4 is fixedly installed at the front end inside the feeding pipe 1 near the nozzle 3 through the installation holes 41. In the middle of the inner wall of the installation ring 4, a filter plate 42 is fixedly connected. A plurality of filter holes 43 are annularly arrayed on the outer wall of the filter plate 42 with the center of the filter plate 42 as the axis; the adjusting mechanism includes a driving component and a flow limiting component. The driving component includes a motor 5. The motor 5 is installed on the top of the nozzle 3. The output end of the motor 5 is fixedly connected with a first bevel gear 51. The top end of the nozzle 3 is rotatably connected with a second bevel gear 52. The first bevel gear 51 and the second bevel gear 52 are meshed and connected. In the middle of the outer wall of the second bevel gear 52, a support column 53 is fixedly connected. The bottom of the support column 53 is rotatably connected to the inner bottom wall of the nozzle 3. In the middle of the outer wall of the support column 53, a third bevel gear 54 with an installation direction opposite to that of the second bevel gear 52 is fixedly connected. The outer wall of the third bevel gear 54 is meshed with a fourth bevel gear 55.

[0029] Adopting the above scheme: The filtering component needs to be installed inside the feeding pipe 1 near the nozzle 3, so as to ensure that the raw materials fully pass through the heating collar 2, improve the melting effect of the plastic particles, and at the same time prevent solid materials from entering the nozzle 3, ensuring that the materials entering the molding die are all in a molten state; the motor 5 drives the first bevel gear 51 and the second bevel gear 52 to engage and drive. At the same time, the third bevel gear 54 drives the fourth bevel gear 55 to synchronously drive along with the support column 53, adjusts the driving direction of the motor 5, and realizes the driving of the external disk 66. At the same time, the filter plate 42 needs to be made of polytetrafluoroethylene material, so as to ensure that the filter plate 42 has sufficient high temperature resistance and corrosion resistance, and the polytetrafluoroethylene has a low friction coefficient and is not easy to adhere to impurities on the surface, which is beneficial to the subsequent cleaning and maintenance operations of the filter plate 42.

[0030] As Figures 2 to 5As shown in the figure, the flow-limiting component includes a fixed disk 6, which is installed on the front side of the fourth bevel gear 55. A plurality of first sliding grooves 62 are equidistantly formed on the outer wall of the fixed disk 6 with the center of the fixed disk 6 as the axis. A plurality of cavities 61 are equidistantly formed on the outer surface of the fixed disk 6. The cavities 61 are communicated with the first sliding grooves 62. A fixed rod 63 is slidably connected to the inner wall of the cavity 61. A positioning rod 65 is fixedly connected to the rear end of the outer wall of the fixed rod 63. The positioning rod 65 is slidably connected to the inner wall of the first sliding groove 62. A flow-limiting disk 64 is fixedly connected to the top end of the fixed rod 63. The rear end of the outer wall of the fixed disk 6 is rotatably connected to an external disk 66. A plurality of second sliding grooves 67 with the same number as the first sliding grooves 62 are annularly arranged on the outer surface of the external disk 66 with the center of the external disk 66 as the axis. The second sliding grooves 67 are arc-shaped and are adapted to the size of the fixed rod 63. The end of the fixed rod 63 extends to the outside of the second sliding groove 67. A first connecting rod 68 is fixedly connected to the rear end of the outer wall of the external disk 66. The end of the first connecting rod 68 is fixedly connected to the outer wall of the fourth bevel gear 55; the self-cleaning component includes a second connecting rod 7, which passes through the fixed disk 6 and is fixedly connected to the front end of the outer wall of the first connecting rod 68. A plurality of third connecting rods 71 are equidistantly fixedly connected to the outer wall of the second connecting rod 7. A cleaning plate 72 is fixedly connected to the end of the third connecting rod 71.

[0031] Adopting the above solution: The first sliding groove 62 and the second sliding groove 67 are used to control the sliding of the fixed rod 63 along a track, so as to realize the extension and contraction of the flow-limiting disk 64. Thus, the size inside the nozzle 3 is controlled by the movement of a plurality of flow-limiting disks 64, and the injection flow rate is controlled to meet the usage requirements in different situations; the second connecting rod 7 is synchronously driven by the first connecting rod 68, and at the same time, the cleaning plate 72 can provide a supporting force for the fourth bevel gear 55 to ensure the stability of the connection between the third bevel gear 54 and the fourth bevel gear 55. At the same time, during the injection process, the rotation of the cleaning plate 72 inside the nozzle can shear the melt, thereby promoting the uniform plasticization of the plastic. Especially when dealing with high-viscosity or easily degradable materials, it helps to maintain the flow consistency of the melt in the runner.

[0032] Such as Figure 2 、 Figure 3 and Figure 5As shown in the figure, the reuse component includes a pressure relief pipeline 8 communicated with the nozzle 3. The end of the pressure relief pipeline 8 is fixedly connected with a conical pipeline 81, and the conical pipeline 81 is communicated with the top end of the filter plate 42. A pressure valve 82 for controlling the opening of the pressure relief pipeline 8 is installed at the front end inside the pressure relief pipeline 8; a check valve 83 for controlling the one-way flow of pressure is installed at the top end inside the pressure relief pipeline 8. A support rod 84 is fixedly connected to the rear end of the inner top wall of the pressure relief pipeline 8, and a piston 85 is slidably connected to the outer wall of the support rod 84; an external ball head 9 is installed outside the third bevel gear 54 and the fourth bevel gear 55. The external ball head 9 is fixedly installed on the outer wall of the support column 53, and the first connecting rod 68 is rotatably connected to the outer wall of the external ball head 9; a plurality of first communication grooves 10 are annularly arranged on the inner wall of the filter plate 42 with the center of the filter plate 42 as the axis. The first communication grooves 10 communicate the annularly distributed filter holes 43. A second communication groove 11 is opened on the front side of the inner top of the filter plate 42, and the second communication groove 11 communicates the plurality of first communication grooves 10; the cleaning plate 72 is adapted to the front end inner wall of the nozzle 3.

[0033] Adopting the above scheme: The pressure relief pipeline 8 is opened through the pressure valve 82, and the pressure controls the piston 85 to move along the outer wall of the support rod 84, thereby pressing down the pressure. The second communication groove 11 and the first communication groove 10 are used to connect the plurality of filter holes 43. At the same time, the second communication groove 11 is opened on the front side of the top of the filter plate 42, so that the filter holes 43 can be cleaned, and at the same time, the solid matter can be blown out from the rear side and dropped back into the feeding pipe 1 to prevent it from entering the nozzle 3. At the same time, a check valve 83 is installed inside the pressure relief pipeline 8 to ensure that the pressure can only flow in one direction and prevent the pressure from blowing back from the feeding pipe 1 into the nozzle 3; an external ball head 9 is installed outside the third bevel gear 54 and the fourth bevel gear 55 to prevent the molten material from adhering to the gears and affecting the use. The spherical external ball head 9 can ensure that the molten material drops downward along the outer surface of the ball head after contacting the external ball head 9, ensuring the continuous flow of the raw material; since tool steel still maintains high hardness and compressive strength in the range of 400 - 600 °C and is suitable for the conventional high-temperature environment of the injection molding machine nozzle 3, and the wear resistance and corrosion resistance can be further improved through surface nitriding treatment. Therefore, the support column 53, the third bevel gear 54, the fourth bevel gear 55 and the external ball head 9 are made of surface-nitrided tool steel material, which can ensure that the device can work inside the nozzle 3 for a long time.

[0034] The working principle and usage process of the present invention:

[0035] First, the raw materials to be injected are fed into the feeding pipe 1 through the feeding port, and then fed into the nozzle 3 through screw feeding. During the transportation of the raw materials in the feeding pipe 1, they pass through the filter plate 42. The mounting ring 4 is installed inside the feeding pipe 1 through the mounting hole 41. The filter plate 42 is distributed with uniform filter holes 43. The unmolten granular raw materials can be intercepted by the filter plate 42 to prevent them from entering the inside of the nozzle 3. At the same time, the motor 5 is started. The motor 5 drives the first bevel gear 51 and the second bevel gear 52 to engage and transmit. During the rotation of the second bevel gear 52, the support column 53 is driven to rotate synchronously. Since the third bevel gear 54 is fixedly connected to the outer wall of the support column 53, the third bevel gear 54 and the fourth bevel gear 55 can be driven to engage and transmit synchronously. The fourth bevel gear 55 is fixedly connected to the external disk 66 through the first connecting rod 68. Therefore, the external disk 66 is driven to rotate synchronously by the rotation of the first connecting rod 68. After the external disk 66 rotates, due to the arc-shaped second chute 67 opened on its outer wall, the second chute 67 drives the fixed rod 63 and the positioning rod 65 to move along the trajectories of the first chute 62 and the second chute 67 while moving. As a result, the fixed rod 63 expands and contracts in the cavity 61, and then the expansion and contraction of the flow-limiting disk 64 are realized, so as to control the size of the flow channel inside the nozzle 3, and finally the injection speed is adjusted. The second connecting rod 7 passes through the fixed disk 6 and is fixedly connected to the first connecting rod 68. When the first connecting rod 68 rotates, the second connecting rod 7 will be driven to rotate synchronously. Therefore, the cleaning plate 72 is controlled by the third connecting rod 71 to clean the inner wall of the nozzle 3, preventing the molten raw materials from depositing on the inner wall of the nozzle 3 and affecting subsequent use. At the same time, on the premise of not affecting the use effect of this application, the shearing action of the cleaning plate 72 on the melt promotes the uniform plasticization of the plastic. Especially when dealing with high-viscosity or easily degradable materials, it helps to maintain the flow consistency of the melt in the runner, improving the injection stability and product quality. Since the cross-sectional sizes of the nozzle 3 and the feeding pipe 1 are different, the pressures inside the two are different during the actual injection process. Therefore, the nozzle 3 and the filter plate 42 are connected through the pressure relief pipeline 8. When the pressure inside the nozzle 3 reaches a certain value, the pressure valve 82 opens. After the compressed air enters the pressure relief pipeline 8, the piston 85 is pushed to move linearly along the support rod 84, thereby controlling the compressed air to enter the second communication groove 11, and then entering the first communication groove 10 through the second communication groove 11, and finally blowing and cleaning the filter holes 43 or the feeding port of the injection molding equipment to prevent solids from blocking the filter plate 42 and ensuring the normal operation of the device. At the same time, the excess pressure is utilized, improving the rationality and practicality of the device use.

[0036] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0037] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device capable of adjusting the injection speed of an injection molding device, comprising a feeding pipe (1), characterized in that: The outer surface of the feed pipe (1) is provided with a heating collar (2) for melting the injection molding raw material in the pipe, the front end of the feed pipe (1) is connected to a nozzle (3), the interior of the feed pipe (1) is provided with a filtering assembly for solid-liquid separation of the injection raw material near the nozzle (3), the interior of the nozzle (3) is provided with an adjusting mechanism for adjusting the injection speed, the interior of the nozzle (3) is provided with a self-cleaning assembly for cleaning the inner wall of the nozzle (3) driven by the adjusting mechanism, and the top of the nozzle (3) is provided with a recycling assembly for recycling the excess pressure inside the nozzle (3).

2. A device for adjusting the injection speed of an injection molding device according to claim 1, characterized in that: The filter assembly comprises a mounting ring (4), and a plurality of mounting holes (41) are equidistantly provided at both ends of an outer wall of the mounting ring (4) with the center of the mounting ring (4) as the axis. The mounting ring (4) is fixedly mounted at the front end of the inner part of the feed pipe (1) near the nozzle (3) through the mounting holes (41). A filter plate (42) is fixedly connected to the middle of the inner wall of the mounting ring (4), and a plurality of filter holes (43) are distributed in a circular array on the outer wall of the filter plate (42) with the center of the filter plate (42) as the axis.

3. The device for adjusting the injection speed of injection molding equipment according to claim 1, characterized in that: The regulating mechanism comprises a driving assembly and a current limiting assembly, wherein the driving assembly comprises a motor (5), wherein the motor (5) is mounted on the top of the nozzle (3), wherein the output end of the motor (5) is fixedly connected to a first bevel gear (51), wherein the top end of the nozzle (3) is rotatably connected to a second bevel gear (52), wherein the first bevel gear (51) and the second bevel gear (52) are meshingly connected, wherein a support column (53) is fixedly connected to the middle of an outer wall of the second bevel gear (52), wherein the bottom of the support column (53) is rotatably connected to an inner bottom wall of the nozzle (3), wherein a third bevel gear (54) whose installation direction is opposite to that of the second bevel gear (52) is fixedly connected to the middle of an outer wall of the support column (53), wherein the outer wall of the third bevel gear (54) is meshingly connected to a fourth bevel gear (55).

4. A device for adjusting the injection speed of injection molding equipment according to claim 3, characterized in that: The current limiting component comprises a fixed disk (6), the fixed disk (6) being mounted on the front side of the fourth bevel gear (55), the outer wall of the fixed disk (6) being equidistantly provided with a plurality of first slide grooves (62) with the center of the fixed disk (6) as the axis, the outer surface of the fixed disk (6) being equidistantly provided with a plurality of cavities (61), the cavities (61) being communicated with the first slide grooves (62), the inner wall of the cavity (61) being slidably connected with a fixed rod (63), the outer wall rear end of the fixed rod (63) being fixedly connected with a positioning rod (65), the positioning rod (65) being slidably connected to the inner wall of the first slide groove (62), the top end of the fixed rod (63) A limiting flow disk (64) is fixedly connected, and the rear end of the outer wall of the fixed disk (6) is rotatably connected to an external disk (66). The outer surface of the external disk (66) is provided with a second slide groove (67) having the same number as the first slide groove (62) in a circular array with the center of the external disk (66) as the axis. The second slide groove (67) is arc-shaped and adapted to the size of the fixed rod (63). The end of the fixed rod (63) extends to the outside of the second slide groove (67). The rear end of the outer wall of the external disk (66) is fixedly connected to a first connecting rod (68), and the end of the first connecting rod (68) is fixedly connected to the outer wall of the fourth bevel gear (55).

5. The device for adjusting the injection speed of injection molding equipment according to claim 4, characterized in that: The self-cleaning assembly comprises a second connecting rod (7), the second connecting rod (7) passes through the fixed plate (6) and is fixedly connected to the front end of the outer wall of the first connecting rod (68), the outer wall of the second connecting rod (7) is fixedly connected to a third connecting rod (71) at an equidistant distance, and the end of the third connecting rod (71) is fixedly connected to a cleaning plate (72).

6. The device for adjusting the injection speed of injection molding equipment according to claim 1, characterized in that: The recycling component comprises a pressure relief pipe (8) connected to the nozzle (3), the end of the pressure relief pipe (8) is fixedly connected to a conical pipe (81), the conical pipe (81) is connected to the top end of the filter plate (42), and a pressure valve (82) for controlling the opening of the pressure relief pipe (8) is installed at the front end of the pressure relief pipe (8).

7. The device for adjusting the injection speed of injection molding equipment according to claim 6, characterized in that: A one-way valve (83) for controlling the one-way flow of pressure is installed at the inner top end of the pressure relief pipe (8), a support rod (84) is fixedly connected to the rear end of the inner top wall of the pressure relief pipe (8), and a piston (85) is slidably connected to the outer wall of the support rod (84).

8. The device for adjusting the injection speed of injection molding equipment according to claim 4, characterized in that: An external ball head (9) is installed on the outer side of the third bevel gear (54) and the fourth bevel gear (55), and the external ball head (9) is fixedly installed on the outer wall of the support column (53), and the first connecting rod (68) is rotatably connected to the outer wall of the external ball head (9).

9. The device for adjusting the injection speed of injection molding equipment according to claim 2, characterized in that: The inner wall of the filter plate (42) is provided with first connecting grooves (10) distributed in an annular array with the center of the filter plate (42) as the axis, the first connecting grooves (10) connecting the filter holes (43) distributed in an annular manner, and the front side of the inner top of the filter plate (42) is provided with a second connecting groove (11), the second connecting groove (11) connecting a plurality of the first connecting grooves (10).

10. The device for adjusting the injection speed of injection molding equipment according to claim 5, characterized in that: The cleaning plate (72) is adapted to the front end of the inner wall of the nozzle (3).

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