An injection nozzle mechanism for vehicle plastic part processing

Abstract

The present invention discloses an injection nozzle mechanism for processing vehicle plastic parts, and belongs to the technical field of automobile plastic parts processing. A material storage assembly is installed at the rear end of a shell; the material storage assembly includes a piston slidably installed in the shell and a driver for driving the piston to slide along the shell; the side of the piston close to the front end of the shell is a flow chamber, and the side of the piston close to the rear end of the shell is a material storage chamber; a filter assembly is installed in the middle of the shell; the filter assembly includes a cylindrical filter screen installed in the flow chamber and coaxial with the shell; a cleaning assembly is installed in the filter assembly; the cleaning assembly includes a cleaning ring sliding against the inner wall of the filter screen, and the cleaning ring is linked to the piston through a connecting shaft. The cleaning assembly in the present invention works in conjunction with the material storage assembly, and automatically cleans impurities on the filter screen during the movement of the piston, reducing the need for manual intervention and downtime for maintenance.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive plastic part processing, and particularly relates to an injection nozzle mechanism for vehicle plastic part processing. Background Art

[0002] In the vehicle plastic part processing industry, as a core device, the operation status of the injection nozzle mechanism is directly related to the quality stability and production efficiency of injection products. However, in actual production, the injection nozzle mechanism often faces two major challenges: First, impurities in the fluid are prone to accumulate and block the nozzle, which not only reduces the surface quality of the injection product but may also cause permanent damage to the nozzle; Second, during the downtime interval, the fluid at the nozzle is prone to overflow or harden due to lack of circulation, which not only wastes valuable raw materials but may also cause nozzle blockage during the next startup, thereby affecting production continuity.

[0003] In response to these situations, traditional methods usually involve adding a filter screen and setting up a temporary storage device in the injection system. The filter screen can effectively intercept impurities in the fluid and reduce the risk of nozzle blockage; while the storage device is used to temporarily store the fluid during downtime to prevent it from directly exposing at the nozzle and causing overflow or hardening. However, there are still some deficiencies: The filter screen needs to be cleaned or replaced regularly, increasing the maintenance cost and prolonging the downtime. Summary of the Invention

[0004] In view of the above technical deficiencies, the present invention provides an injection nozzle mechanism for vehicle plastic part processing, which intermittently cleans the filter component by setting up a cleaning component linked to the storage component.

[0005] The present invention adopts the following technical solutions: An injection nozzle mechanism for vehicle plastic part processing, including a cylindrical outer shell, a nozzle is connected to the front end of the outer shell, and a feed pipe is connected to the outer shell;

[0006] It further includes:

[0007] A storage component, installed at the rear end of the outer shell; the storage component includes a piston slidably installed in the outer shell and a driver for driving the piston to slide along the outer shell; one side of the piston close to the front end of the outer shell is a flow cavity, and one side of the piston close to the rear end of the outer shell is a storage cavity;

[0008] A filter component, installed in the middle of the outer shell; the filter component includes a cylindrical filter screen installed in the flow cavity and coaxial with the outer shell;

[0009] A cleaning component, installed in the filter component; the cleaning component includes a cleaning ring that slides along the inner wall of the filter screen, and the cleaning ring is linked to the piston through a connecting shaft;

[0010] Among them, the flow chamber includes a flow inner chamber and a flow outer chamber. The feed pipe is communicated with the flow inner chamber, and the nozzle is communicated with the flow outer chamber. During operation, the fluid in the feed pipe first enters the flow inner chamber, then passes through the filter screen from the inner wall of the filter screen into the flow outer chamber, and finally reaches the nozzle.

[0011] Preferably: The driver is fixed at the rear end of the housing. The telescopic shaft of the driver extends into the housing and is coaxial with the housing. The piston is fixed at the end of the telescopic shaft.

[0012] A breathable valve communicating with the storage chamber is fixed at the rear end of the housing.

[0013] Preferably: The filter assembly includes a support cylinder. One end of the support cylinder is open, and the other end of the support cylinder is closed.

[0014] The closed end of the support cylinder is conical.

[0015] A sinking groove is formed on the inner wall of the open end of the support cylinder, and a first through hole communicating with the outer wall of the support cylinder is formed at the bottom of the sinking groove. The filter screen is embedded in the sinking groove.

[0016] Preferably: The open end of the support cylinder has a guiding shoulder and a stop.

[0017] One end of the filter screen has an edge, and the edge is embedded in the stop.

[0018] A step is provided in the middle of the inner wall of the housing. The guiding shoulder of the support cylinder abuts against the step, and the edge of the filter screen is pressed between the guiding shoulder and the step.

[0019] Preferably, the cleaning assembly further includes:

[0020] A dirt collection ring, which is embedded at the rear end of the cleaning ring. Filter holes are formed at the bottom of the dirt collection ring.

[0021] A rear cover plate, which is fixed on the connecting shaft and located at the rear side of the dirt collection ring.

[0022] A front top plate, which is fixed on the connecting shaft and located at the front side of the dirt collection ring.

[0023] When the connecting shaft moves backward, the front top plate abuts against the front end of the dirt collection ring, and there is a gap between the rear cover plate and the dirt collection ring.

[0024] When the connecting shaft moves forward, the rear cover plate abuts against the rear end of the dirt collection ring, and there is a gap between the front top plate and the dirt collection ring.

[0025] Preferably: A sinking hole for installing the dirt collection ring is formed at the rear end of the cleaning ring. An annular dirt collection groove with an opening facing backward is formed between the rear end of the cleaning ring and the dirt collection ring. The front end of the cleaning ring is conical and cooperates with the support cylinder. A second through hole penetrating the cleaning ring is formed at the front end of the cleaning ring.

[0026] The front end of the connecting shaft is slidably connected to the cleaning ring, and the rear end of the connecting shaft is fixedly connected to the piston.

[0027] Preferably: The rear cover plate is provided with a hollow hole; when the rear cover plate abuts against the rear end of the dirt collecting ring, the rear cover plate closes the dirt collecting groove.

[0028] Preferably: The front end of the nozzle is conical, and the rear end of the nozzle is a conical groove that fits with the open end of the support cylinder;

[0029] The front end of the nozzle is connected to the injection pipe, and a plurality of third through holes communicating with the injection pipe are provided at the rear end of the nozzle, and the third through holes communicate with the flowing outer cavity.

[0030] Preferably: Installation grooves are provided on both the outer wall and the inner wall of the nozzle, and the two installation grooves are respectively located inside and outside the third through hole;

[0031] Heating rings are installed in the installation grooves;

[0032] A heat insulation sleeve is sleeved outside the nozzle.

[0033] The beneficial effects of the present invention are as follows:

[0034] The filter screen in the filter component can effectively filter out impurities in the fluid and prevent impurities from entering the nozzle; a supporting cleaning component is provided for the filter screen, and the cleaning component is linked with the material storage component; during the downtime interval, the material storage component starts to work, and the area of the flowing cavity is increased by the movement of the piston, so that the fluid flows reversely, avoiding the overflow or hardening of the fluid at the nozzle; at the same time, the cleaning ring is linked with the piston, and the impurities on the filter screen are automatically cleaned when the piston moves, reducing the need for manual cleaning, improving production efficiency and automation degree;

[0035] The dirt collecting ring is added to the cleaning component, which can temporarily store the impurities collected during the cleaning process, thereby extending the cycle of downtime maintenance and cleaning and improving production efficiency; the design of the dirt collecting ring cooperates with the rear cover plate and the front top plate to ensure the effective collection of impurities and prevent the leakage of impurities;

[0036] Heating rings are installed inside and outside the nozzle to achieve efficient heating of the fluid. The conical design of the nozzle and the inclined third through holes are beneficial to the uniform distribution and heating of the fluid, improving the accuracy and efficiency of temperature control. Description of the Drawings

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0038] Figure 1 This is a three-dimensional view of an injection nozzle mechanism for vehicle plastic part processing according to the present invention.

[0039] Figure 2 This is a front view of an injection nozzle mechanism for vehicle plastic part processing according to the present invention.

[0040] Figure 3 is Figure 2 an enlarged view of part A in

[0041] Figure 4 This is a schematic structural view of the filter component in the present invention.

[0042] Figure 5 This is a schematic structural view of the cleaning component in the present invention.

[0043] Figure 6 This is a schematic structural view of the nozzle in the present invention.

[0044] Explanation of reference numerals in the drawings: 1. Outer shell; 11. Flow cavity; 111. Inner flow cavity; 112. Outer flow cavity; 12. Material storage cavity; 13. Step;

[0045] 2. Nozzle; 21. Injection tube; 22. Third through hole; 23. Installation groove; 24. Heating ring; 25. Heat insulation sleeve;

[0046] 3. Feed pipe;

[0047] 4. Filter component; 41. Filter screen; 411. Edge; 42. Support cylinder; 421. Guide shoulder; 422. Sunk groove; 423. First through hole; 424. Stopper;

[0048] 5. Material storage component; 51. Piston; 52. Driver; 521. Telescopic shaft; 53. Air permeable valve;

[0049] 6. Cleaning component; 61. Cleaning ring; 611. Second through hole; 62. Connecting shaft; 63. Dirt collecting ring; 631. Filter hole; 632. Dirt collecting groove; 64. Rear cover plate; 65. Front top plate. Detailed implementation manners

[0050] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with 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 efforts shall fall within the protection scope of the present invention.

[0051] Embodiment 1:

[0052] Combined with Figures 1 to 3As shown in the figure, the present invention provides an injection nozzle mechanism for vehicle plastic part processing. The housing 1 is cylindrical, the nozzle 2 is fixed at the front end of the housing 1, and the feed pipe 3 is connected to the middle of the housing 1. A filter assembly 4, a material storage assembly 5 and a cleaning assembly 6 are also installed in the housing 1.

[0053] The material storage assembly 5 is installed at the rear end of the housing 1 for temporarily storing the fluid and sealing the housing 1. The material storage assembly 5 includes a piston 51 which is slidably installed at the rear part in the housing 1. The side of the piston 51 close to the front end of the housing 1 is a flow chamber 11, and the side of the piston 51 close to the rear end of the housing 1 is a material storage chamber 12. A breather valve 53 communicating with the material storage chamber 12 is fixed at the rear end of the housing 1. The actuator 52 is an electric cylinder, and the telescopic shaft 521 of the actuator 52 is coaxial with the housing 1. The piston 51 is fixed at the end of the telescopic shaft 521 and is positioned by a shaft retaining ring.

[0054] Combined with Figure 4 As shown in the figure, the filter assembly 4 is installed in the middle of the housing 1. The filter assembly 4 includes a support cylinder 42 coaxial with the housing 1. The rear end of the support cylinder 42 is open, and the front end is a closed cone. A circular groove 422 is formed on the inner wall at the rear end of the support cylinder 42, and a circle of uniformly distributed first through holes 423 are formed at the bottom of the circular groove 422 to communicate the inside and outside of the support cylinder 42. The open end of the support cylinder 42 has a guiding shoulder 421 and a stop 424. The inner wall of the housing 1 is stepped, and there is a step 13 in the middle of the inner wall of the housing 1. The guiding shoulder 421 is slidably matched with the inner wall of the housing 1 and abuts against the step 13 to realize the installation guiding and positioning of the support cylinder 42.

[0055] The filter screen 41 is embedded in the circular groove 422, and the inner wall of the filter screen 41 is aligned with the inner wall of the support cylinder 42. An edge 411 is provided at the rear end of the filter screen 41, and the edge 411 is fitted into the stop 424. After the support cylinder 42 is installed in the housing 1, the edge 411 of the filter screen 41 is pressed between the guiding shoulder 421 and the step 13 to realize the positioning of the filter screen 41.

[0056] The filter screen 41 divides the flow chamber 11 into a flow inner chamber 111 and a flow outer chamber 112. The feed pipe 3 communicates with the flow inner chamber 111, and the nozzle 2 communicates with the flow outer chamber 112. During operation, the fluid in the feed pipe 3 first enters the flow inner chamber 111, then passes through the filter screen 41 from the inner wall of the filter screen 41 into the flow outer chamber 112, and finally reaches the nozzle 2; the impurities in the fluid will be filtered by the filter screen 41 and stay in the flow inner chamber 111.

[0057] Combined with Figures 1 to 3 As shown in the figure, the cleaning assembly 6 is installed in the filter assembly 4. The cleaning assembly 6 includes a cleaning ring 61 that slides along the inner walls of the support cylinder 42 and the filter screen 41. The cleaning ring 61 is linked with the piston 51 through a connecting shaft 62.

[0058] During the interval between the operation and shutdown of the injection nozzle mechanism:

[0059] The driver 52 drives the piston 51 to slide backward in the housing 1, reducing the area of the material storage chamber 12 and increasing the area of the flow chamber 11. In this way, the housing 1 can temporarily store more fluid entering from the feed pipe 3, and reverse the flow of the fluid at the front part of the housing 1, preventing the fluid from overflowing or hardening at the nozzle 2 and affecting the next operation.

[0060] During this process, the piston 51 drives the cleaning ring 61 through the connecting shaft 62. The cleaning ring 61 moves backward closely against the filter screen 41, cleaning the impurities attached to the filter screen 41. At the same time, the reverse flow of the fluid can also wash away the particles stuck in the filter screen 41.

[0061] Embodiment 2:

[0062] Based on the above Embodiment 1, a dirt storage ring 63 is arranged in the cleaning component 6 in this embodiment for temporarily storing impurities, so as to extend the cycle of shutdown maintenance and cleaning and improve production efficiency.

[0063] Combined Figures 2 to 5 As shown, the front end of the cleaning ring 61 is conical and is matched with the support cylinder 42. A counterbore for installing the dirt storage ring 63 is provided at the rear end of the cleaning ring 61. A second through hole 611 penetrating the cleaning ring 61 is provided at the front end of the cleaning ring 61, and a plurality of second through holes 611 are evenly distributed around the axis of the cleaning ring 61 for communicating the front space and the rear counterbore of the cleaning ring 61, ensuring that the cleaning ring 61 can slide smoothly in the support cylinder 42. A stepped hole is provided at the axis of the front end of the cleaning ring 61, and the front end of the connecting shaft 62 is slidably connected to the stepped hole of the cleaning ring 61. The rear end of the connecting shaft 62 is threadedly connected to one end of the telescopic shaft 521 of the driver 52. A countersunk bolt is threadedly connected to the front end of the connecting shaft 62, and the cleaning ring 61 is positioned at the front end of the connecting shaft 62 through the countersunk bolt, and the cleaning ring 61 can float relative to the connecting shaft 62 by a certain distance.

[0064] The dirt storage ring 63 is embedded at the rear end of the cleaning ring 61. An annular dirt storage groove 632 with an opening facing backward is formed between the rear end of the cleaning ring 61 and the dirt storage ring 63. Filter holes 631 are provided at the bottom of the dirt storage ring 63. An inner inclined surface is provided at the rear end of the cleaning ring 61 to facilitate the fluid to enter the dirt storage groove 632 along the inner inclined surface.

[0065] The rear cover plate 64 is fixed on the connecting shaft 62 and is located at the rear side of the dirt storage ring 63, and the front top plate 65 is fixed on the connecting shaft 62 and is located at the front side of the dirt storage ring 63. Hollow holes are provided on the rear cover plate 64, but there are no hollow holes at the position of the rear cover plate 64 axially opposite to the dirt storage groove 632.

[0066] Working principle:

[0067] When the connecting shaft 62 moves backward, the front top plate 65 abuts against the front end of the dirt collecting ring 63 and seals the central hole of the dirt collecting ring 63; at this time, there is a gap between the rear cover plate 64 and the dirt collecting ring 63; as the connecting shaft 62 moves, the cleaning ring 61 will closely adhere to the filter screen 41 and move backward to clean the impurities adhering to the filter screen 41, and the fluid will enter the dirt collecting groove 632 along the gap between the cleaning ring 61 and the rear cover plate 64, and then continue to flow forward through the filtering holes 631 at the bottom of the dirt collecting groove 632, while the impurities will be retained in the dirt collecting groove 632;

[0068] Subsequently, when the connecting shaft 62 moves forward again to reset, the rear cover plate 64 abuts against the rear end of the dirt collecting ring 63 and seals the dirt collecting groove 632 to reduce the leakage of impurities inside the dirt collecting groove 632; there is a gap between the front top plate 65 and the dirt collecting ring 63, and in cooperation with the hollow holes on the rear cover plate 64, it ensures the fluid circulation and guarantees the normal reset of the cleaning assembly 6.

[0069] Embodiment Three:

[0070] On the basis of the above Embodiment One, in combination with Figures 1 to 3 and Figure 6 as shown, this embodiment provides a nozzle 2 to improve the temperature control effect of the fluid.

[0071] The nozzle 2 is installed at the front end of the outer shell 1 by threaded connection. The front end of the nozzle 2 is conical, and the rear end of the nozzle 2 is a conical groove that mates with the open end of the support cylinder 42. The conical groove at the rear end of the nozzle 2 abuts against the support cylinder 42 to achieve the positioning of the support cylinder 42. The front end of the nozzle 2 is connected with a spray pipe 21. A plurality of third through holes 22 communicating with the spray pipe 21 are opened at the rear end of the nozzle 2. The third through holes 22 are inclined and evenly distributed around the axis of the nozzle 2. The third through holes 22 communicate the flowing outer cavity 112 and the nozzle 2. Installation grooves 23 are opened on both the outer wall and the inner wall of the nozzle 2. The two installation grooves 23 are respectively arranged inside and outside the third through holes 22, and heating rings 24 are installed in the installation grooves 23. A heat insulation sleeve 25 is sleeved outside the nozzle 2. During operation, the heating rings 24 on both the inside and outside of the nozzle 2 efficiently heat the fluid in the third through holes 22 to facilitate the control of the fluid temperature.

[0072] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these changes and modifications.

Claims

1. An injection nozzle mechanism for processing vehicle plastic parts, comprising a cylindrical shell, a nozzle connected to the front end of the shell, and a feed pipe connected to the shell; It is characterized in that Also includes: A material storage assembly is installed at the rear end of the shell; the material storage assembly includes a piston slidably installed in the shell and a driver for driving the piston to slide along the shell; the side of the shell in front of the piston is a flow chamber, and the side of the shell in the rear of the piston is a material storage chamber; A filter assembly is installed in the middle of the housing; the filter assembly includes a cylindrical filter screen installed in the flow cavity and coaxial with the housing; A cleaning assembly is installed in the filter assembly; the cleaning assembly includes a cleaning ring sliding against the inner wall of the filter screen, and the cleaning ring is linked to the piston through a connecting shaft; Among them, the flow cavity includes an inner flow cavity and an outer flow cavity, the feed pipe is connected to the inner flow cavity, and the nozzle is connected to the outer flow cavity; when working, the fluid in the feed pipe first enters the inner flow cavity, then passes through the filter from the inner wall of the filter screen into the outer flow cavity, and finally reaches the nozzle.

2. The injection nozzle mechanism for processing vehicle plastic parts according to claim 1, characterized in that: The driver is fixed at the rear end of the housing, the telescopic shaft of the driver extends into the housing and is coaxial with the housing, and the piston is fixed at the end of the telescopic shaft; A vent valve connected to the material storage cavity is fixed at the rear end of the shell.

3. The injection nozzle mechanism for processing vehicle plastic parts according to claim 1, characterized in that: The filter assembly includes a support tube, one end of the support tube is open, and the other end of the support tube is closed; The closed end of the support tube is conical; The inner wall of the open end of the support tube is provided with a sinking groove, and the bottom of the sinking groove is provided with a first through hole connected to the outer wall of the support tube; the filter screen is embedded in the sinking groove.

4. The injection nozzle mechanism for processing vehicle plastic parts according to claim 3, characterized in that: The open end of the support tube has a guide shoulder and a stop; The filter screen has an edge at one end, and the edge is embedded in the stop; The inner wall of the shell is provided with a step in the middle; the guide shoulder of the support cylinder abuts against the step, and the edge of the filter screen is squeezed between the guide shoulder and the step.

5. The injection nozzle mechanism for processing vehicle plastic parts according to claim 3, characterized in that: The cleaning component also includes: A dirt receiving ring is embedded in the rear end of the cleaning ring, and a filtering hole is provided at the bottom of the dirt receiving ring; A rear cover plate, fixed on the connecting shaft and located at the rear side of the dirt receiving ring; A front top plate, fixed on the connecting shaft and located at the front side of the dirt receiving ring; When the connecting shaft moves backward, the front top plate abuts against the front end of the dirt receiving ring, and there is a gap between the rear cover plate and the dirt receiving ring; When the connecting shaft moves forward, the rear cover plate abuts against the rear end of the dirt receiving ring, and a gap is formed between the front top plate and the dirt receiving ring.

6. The injection nozzle mechanism for processing vehicle plastic parts according to claim 5, characterized in that: The rear end of the cleaning ring is provided with a countersunk hole for installing a dirt receiving ring, and an annular dirt receiving groove with an opening facing backward is formed between the rear end of the cleaning ring and the dirt receiving ring; the front end of the cleaning ring is a cone that matches the support tube, and the front end of the cleaning ring is provided with a second through hole that penetrates the cleaning ring; The front end of the connecting shaft is slidably connected to the cleaning ring, and the rear end of the connecting shaft is fixedly connected to the piston.

7. The injection nozzle mechanism for processing vehicle plastic parts according to claim 6, characterized in that: The rear cover plate is provided with a hollow hole; when the rear cover plate abuts against the rear end of the dirt receiving ring, the rear cover plate closes the dirt receiving groove.

8. The injection nozzle mechanism for processing vehicle plastic parts according to claim 3, characterized in that: The front end of the nozzle is conical, and the rear end of the nozzle is a conical groove that matches the open end of the support tube; The front end of the nozzle is connected to the injection pipe, and the rear end of the nozzle is provided with a plurality of third through holes connected to the injection pipe, and the third through holes are connected to the flow outer cavity.

9. The injection nozzle mechanism for processing vehicle plastic parts according to claim 8, characterized in that: The outer wall and the inner wall of the nozzle are both provided with mounting grooves, and the two mounting grooves are respectively arranged on the inner and outer sides of the third through hole; A heating ring is installed in each of the installation grooves; The nozzle is covered with a heat insulation sleeve.

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