Injection molding spray head mechanism for vehicle plastic part machining

Abstract

The invention discloses an injection molding spray head mechanism for vehicle plastic part machining, and belongs to the technical field of vehicle plastic part machining. The storage assembly is installed at the rear end of the shell. The material storage assembly comprises a piston installed in the shell in a sliding mode and a driver used for driving the piston to slide along the shell. The side, close to the front end of the shell, of the piston is a flowing cavity, and the side, close to the rear end of the shell, of the piston is a storage cavity. The filtering assembly is mounted in the middle of the shell; the filter assembly comprises a cylindrical filter screen which is mounted in the flowing cavity and is coaxial with the shell; the cleaning assembly is mounted in the filtering assembly; the cleaning assembly comprises a cleaning ring which slides close to the inner wall of the filter screen, and the cleaning ring is linked with the piston through a connecting shaft. The cleaning assembly and the material storage assembly work in a linkage mode, impurities on the filter screen are automatically cleaned in the moving process of the piston, the requirement for manual intervention is reduced, and the shutdown maintenance time is shortened.

Description

Technical Field

[0001] The invention relates to the technical field of automobile plastic parts processing, in particular to an injection molding nozzle mechanism for vehicle plastic parts processing. Background Art

[0002] In the automotive plastic parts processing industry, the injection nozzle mechanism is a core equipment, and its operating status is directly related to the quality stability and production efficiency of the injection molded products. However, in actual production, the injection nozzle mechanism often faces two major challenges: First, impurities in the fluid are easy to accumulate and clog the nozzle, which not only reduces the surface quality of the injection molded product, but also may cause permanent damage to the nozzle; second, during the downtime, the fluid at the nozzle is easy to overflow or harden due to lack of circulation, which not only wastes precious raw materials, but may also cause nozzle clogging at the next startup, thus affecting production continuity.

[0003] To address these situations, the traditional method is usually to add filters and set up temporary storage devices in the injection molding system. The filter can effectively intercept impurities in the fluid and reduce the risk of nozzle clogging; while the storage device is used to temporarily store the fluid during shutdown to prevent it from being directly exposed to the nozzle and causing overflow or hardening. However, there are still some shortcomings: the filter needs to be cleaned or replaced regularly, which increases maintenance costs and prolongs downtime. Summary of the invention

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

[0005] The present invention adopts the following technical scheme: 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; 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 piston close to the front end of the shell is a flow cavity, and the side of the piston close to the rear end of the shell is a material storage cavity; 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.

[0006] 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, 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.

[0007] Preferably, the filter assembly comprises 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.

[0008] Preferably: 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.

[0009] Preferably, the cleaning component further comprises: 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.

[0010] Preferably: 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.

[0011] Preferably, a hollow hole is formed on the rear cover plate; when the rear cover plate abuts against the rear end of the dirt receiving ring, the rear cover plate closes the dirt receiving groove.

[0012] Preferably: 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.

[0013] Preferably: both the outer wall and the inner wall of the nozzle are 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.

[0014] The beneficial effects of the present invention are: The filter in the filter assembly can effectively filter out impurities in the fluid and prevent impurities from entering the nozzle; the filter is equipped with a matching cleaning assembly, and the cleaning assembly is linked with the material storage assembly; during the downtime, the material storage assembly starts to work, and the flow chamber area is increased by the movement of the piston, so that the fluid flows in the opposite direction, avoiding fluid overflow or hardening at the nozzle; at the same time, the cleaning ring is linked with the piston, and the impurities on the filter are automatically cleaned when the piston moves, reducing the need for manual cleaning and improving production efficiency and automation. The dirt collecting ring is added to the cleaning component to temporarily store the impurities collected during the cleaning process, thereby extending the shutdown maintenance cleaning cycle 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 impurities from leaking out; 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 hole are conducive to the uniform distribution and heating of the fluid, improving the accuracy and efficiency of temperature control. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 The present invention is a stereoscopic diagram of an injection nozzle mechanism for processing vehicle plastic parts.

[0017] Figure 2 The present invention is a front view of an injection nozzle mechanism for processing vehicle plastic parts.

[0018] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0019] Figure 4 It is a schematic diagram of the structure of the filter assembly in the present invention.

[0020] Figure 5 It is a schematic diagram of the structure of the cleaning component in the present invention.

[0021] Figure 6 It is a schematic diagram of the structure of the nozzle in the present invention.

[0022] Description of reference numerals: 1, housing; 11, flow cavity; 111, flow inner cavity; 112, flow outer cavity; 12, storage cavity; 13, step; 2. Nozzle; 21. Injection pipe; 22. Third through hole; 23. Mounting groove; 24. Heating ring; 25. Insulation sleeve; 3. Feed pipe; 4. Filter assembly; 41. Filter screen; 411. Edge; 42. Support cylinder; 421. Guide shoulder; 422. Sink; 423. First through hole; 424. Stop; 5. Material storage assembly; 51. Piston; 52. Driver; 521. Telescopic shaft; 53. Breathing valve; 6. Cleaning assembly; 61. Cleaning ring; 611. Second through hole; 62. Connecting shaft; 63. Dirt ring; 631. Filter hole; 632. Dirt tank; 64. Rear cover; 65. Front top plate. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Embodiment 1: Combination Figures 1 to 3 As shown, the present invention provides an injection nozzle mechanism for processing vehicle plastic parts. The housing 1 is cylindrical, the nozzle 2 is fixed to the front end of the housing 1, and the feed pipe 3 is connected to the middle of the housing 1. The housing 1 is also equipped with a filter assembly 4, a storage assembly 5 and a cleaning assembly 6.

[0025] The material storage assembly 5 is installed at the rear end of the housing 1 for temporarily storing fluid and sealing the housing 1. The material storage assembly 5 includes a piston 51, which is slidably installed at the rear of the housing 1. The side of the piston 51 close to the front end of the housing 1 is the flow chamber 11, and the side of the piston 51 close to the rear end of the housing 1 is the material storage chamber 12. A breathable valve 53 connected to the material storage chamber 12 is fixed at the rear end of the housing 1. The driver 52 adopts an electric cylinder, and the telescopic shaft 521 of the driver 52 is coaxial with the housing 1. The piston 51 is fixed to the end of the telescopic shaft 521 and is positioned by a shaft retaining ring.

[0026] Recombination Figure 4As shown, the filter assembly 4 is installed in the middle of the housing 1. The filter assembly 4 includes a support tube 42 coaxial with the housing 1, the rear end of the support tube 42 is open, and the front end is a closed cone. A circle of sink grooves 422 are provided on the inner wall of the rear end of the support tube 42, and a circle of evenly distributed first through holes 423 are provided at the bottom of the sink groove 422 to connect the inside and outside of the support tube 42. The open end of the support tube 42 has a guide shoulder 421 and a stop 424. The inner wall of the housing 1 is stepped, and a step 13 is provided in the middle of the inner wall of the housing 1. The guide shoulder 421 slides with the inner wall of the housing 1 and abuts against the step 13 to achieve installation guidance and positioning of the support tube 42.

[0027] The filter screen 41 is embedded in the sink 422, and the inner wall of the filter screen 41 is aligned with the inner wall of the support tube 42. An edge 411 is provided at the rear end of the filter screen 41, and the edge 411 is embedded in the stop 424. After the support tube 42 is installed in the housing 1, the edge 411 of the filter screen 41 is squeezed between the guide shoulder 421 and the step 13 to achieve the positioning of the filter screen 41.

[0028] The filter screen 41 divides the flow cavity 11 into an inner flow cavity 111 and an outer flow cavity 112. The feed pipe 3 is connected to the inner flow cavity 111, and the nozzle 2 is connected to the outer flow cavity 112. During operation, the fluid in the feed pipe 3 first enters the inner flow cavity 111, then passes through the filter screen 41 from the inner wall of the filter screen 41 to enter the outer flow cavity 112, and finally reaches the nozzle 2; impurities in the fluid will be filtered by the filter screen 41 and stay in the inner flow cavity 111.

[0029] Combination Figures 1 to 3 As shown, the cleaning assembly 6 is installed in the filter assembly 4. The cleaning assembly 6 includes a cleaning ring 61 sliding against the inner wall of the support cylinder 42 and the filter screen 41, and the cleaning ring 61 is linked with the piston 51 through the connecting shaft 62.

[0030] The injection nozzle mechanism is in the gap of work stop: The driver 52 drives the piston 51 to slide backward in the housing 1, so that the area of ​​the storage chamber 12 is reduced and the area of ​​the flow chamber 11 is increased; thus, the housing 1 can temporarily store more fluid entering from the feed pipe 3, and the fluid in the front of the housing 1 can flow in the reverse direction, so as to prevent the fluid from overflowing or hardening at the nozzle 2, which would affect the next operation; During this process, the piston 51 drives the cleaning ring 61 through the connecting shaft 62, and the cleaning ring 61 moves backward closely against the filter screen 41 to clean out impurities attached to the filter screen 41; at the same time, the reverse flow of the fluid can also flush out particles stuck in the filter screen 41.

[0031] Embodiment 2: On the basis of the above-mentioned first embodiment, in this embodiment, a dirt collecting ring 63 is provided in the cleaning component 6 for temporarily storing impurities, so as to extend the shutdown maintenance and cleaning cycle and improve production efficiency.

[0032] Combination Figures 2 to 5 As shown, the front end of the cleaning ring 61 is a cone that matches the support tube 42, and the rear end of the cleaning ring 61 is provided with a countersunk hole for installing the dirt receiving ring 63. The front end of the cleaning ring 61 is provided with a second through hole 611 that penetrates the cleaning ring 61, and a plurality of second through holes 611 are evenly distributed around the axis of the cleaning ring 61, which are used to connect the front space and the rear countersunk hole of the cleaning ring 61, so as to ensure that the cleaning ring 61 can slide smoothly in the support tube 42. A stepped hole is provided at 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, and the rear end of the connecting shaft 62 is connected to one end of the telescopic shaft 521 of the driver 52 through a thread. A countersunk bolt is connected to the front end of the connecting shaft 62 through a thread, 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 at a certain distance.

[0033] The dirt receiving ring 63 is embedded in the rear end of the cleaning ring 61, and a circular dirt receiving groove 632 with an opening facing backward is formed between the rear end of the cleaning ring 61 and the dirt receiving ring 63, and a filtering hole 631 is provided at the bottom of the dirt receiving ring 63. The rear end of the cleaning ring 61 is provided with an inner bevel to facilitate the fluid to enter the dirt receiving groove 632 along the inner bevel.

[0034] The rear cover plate 64 is fixed on the connecting shaft 62 and is located at the rear side of the dirt receiving 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 receiving ring 63; a hollow hole is opened on the rear cover plate 64, but there is no hollow hole at the axially opposite position of the rear cover plate 64 and the dirt receiving groove 632.

[0035] Working principle: When the connecting shaft 62 moves backward, the front top plate 65 abuts against the front end of the dirt receiving ring 63 and seals the central hole of the dirt receiving ring 63; at this time, there is a gap between the rear cover plate 64 and the dirt receiving ring 63; as the connecting shaft 62 moves, the cleaning ring 61 moves backward closely against the filter screen 41 to clean out the impurities attached to the filter screen 41, and the fluid will enter the dirt receiving groove 632 along the gap between the cleaning ring 61 and the rear cover plate 64, and then continue to flow forward through the filter hole 631 at the bottom of the dirt receiving groove 632, and the impurities will remain in the dirt receiving groove 632; Subsequently, when the connecting shaft 62 moves forward again to reset, the rear cover plate 64 presses against the rear end of the dirt collecting ring 63 and seals the dirt collecting groove 632, reducing 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, which cooperates with the hollow hole on the rear cover plate 64 to ensure fluid circulation and ensure the normal reset of the cleaning component 6.

[0036] Embodiment three: Based on the above embodiment 1, Figures 1 to 3 and Figure 6 As shown, this embodiment provides a nozzle 2 to improve the temperature control effect of the fluid.

[0037] The nozzle 2 is installed at the front end of the housing 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 matches the open end of the support tube 42. The conical groove at the rear end of the nozzle 2 is pressed against the support tube 42 to achieve the positioning of the support tube 42. The front end of the nozzle 2 is connected to the injection tube 21, and the rear end of the nozzle 2 is provided with a plurality of third through holes 22 connected to the injection tube 21. The third through holes 22 are inclined and evenly distributed around the axis of the nozzle 2. The third through hole 22 connects the flow outer cavity 112 and the nozzle 2. The outer wall and the inner wall of the nozzle 2 are provided with mounting grooves 23. The two mounting grooves 23 are arranged on the inner and outer sides of the third through hole 22. Heating rings 24 are installed in the mounting grooves 23, and the outer sleeve of the nozzle 2 is provided with a heat insulation sleeve 25. When working, the heating rings 24 on the inner and outer sides of the nozzle 2 realize efficient heating of the fluid in the third through hole 22, so as to facilitate the temperature regulation of the fluid.

[0038] 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 equivalents, the present invention is also intended to include these modifications and variations.

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 piston close to the front end of the shell is a flow cavity, and the side of the piston close to the rear end of the shell is a material storage cavity; 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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