An injection molding device for an air outlet grille of an automobile air conditioner

Abstract

The present application relates to the technical field of injection molding device, especially to an injection molding device for hollow blade of air outlet of automobile air conditioner, comprising a fixed mold and a movable mold which are vertically closed, the fixed mold is fixedly arranged, the movable mold is driven by a hydraulic telescopic cylinder to make opening and closing movement along the vertical direction, and a molding cavity for molding the hollow blade is formed after the two molds are closed, further comprising a sliding seat, an inner shaft core, an end slot core, a surface slot core and a pushing plate. Thus, the present application adopts the built-in sliding seat integrated core structure, cooperates with multiple sealing, partition cooling and step-by-step pre-tightening spring, effectively improves the molding precision, eliminates defects such as overflow, shrinkage mark and mold sticking, a plurality of guiding anti-rotation structures guarantee smooth operation of the equipment, the adjustable pushing plate is suitable for various products, the material guide frame has the functions of flow guiding and counterweight, and the overall structure is simple, has strong universality and has longer service life.

Description

Technical Field

[0001] This invention relates to the technical field of injection molding equipment, and more particularly to an injection molding device for hollow blades in automotive air conditioning vents. Background Technology

[0002] The hollow blades of automotive air conditioning vents are thin-walled injection molded parts. The workpieces have hollow structures such as shaft holes and through grooves, which require high precision in molding dimensions.

[0003] Currently, injection molds for producing this type of workpiece generally adopt an external side-pulling core structure to form the hollow parts. The mold has a large number of external parts, a complicated overall structure, and a large workload for assembly and maintenance. Conventional cores are mostly single-sided fixed structures, which are easily displaced by the impact of molten material flow during injection molding, resulting in dimensional deviations in the shaft holes and through slots of the product, making it difficult to meet the requirements of high-precision mass production. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, the purpose of this invention is to provide an injection molding device for hollow blades in automotive air conditioning vents. This invention adopts an integrated core structure with a built-in slide block, combined with multiple seals, zoned cooling, and step-by-step pre-tightening springs, which effectively improves molding accuracy and eliminates defects such as overflow, shrinkage marks, and sticking. Multiple sets of guide anti-rotation structures ensure stable operation of the equipment. The adjustable push plate is compatible with various products, and the guide frame has both guiding and counterweight functions. The overall structure is simple, versatile, and has a longer service life.

[0006] To achieve the above objectives, the present invention proposes an injection molding device for hollow blades of automotive air conditioning vents, comprising a fixed mold and a moving mold that are vertically aligned. The fixed mold is fixedly installed, and the moving mold performs opening and closing movements in the vertical direction under the drive of a hydraulic telescopic cylinder. After the two molds are closed, they enclose a molding cavity for molding the hollow blades. The device also includes a slide block, an inner shaft core, an end groove core, a surface groove core, and a push plate. The bottom of the fixed mold is provided with an upper mold cavity, an upper guide groove, and an upper sliding groove, and the top of the moving mold is provided with a lower mold cavity, a lower guide groove, and a lower sliding groove that are adapted to the upper mold cavity, the upper guide groove, and the upper sliding groove. The slide block is vertically slidably connected within the sliding space enclosed by the upper slide groove and the lower slide groove. A first spring is provided between the top of the slide block and the inner top wall of the upper slide groove, and a second spring is provided between the bottom of the slide block and the inner bottom wall of the lower slide groove. The elastic force of the second spring is greater than that of the first spring. The inner shaft core and the end groove core are integrally formed on the surface of the slide block. They extend into the shaft groove and plate groove formed by the combination of the upper mold cavity and the lower mold cavity, respectively. The surface groove core is integrally formed on the top wall of the upper mold cavity and the bottom wall of the lower mold cavity, respectively. The upper and lower end faces of the surface groove core are tightly fitted with the corresponding end faces of the end groove core. The pusher plate is horizontally slidably connected to the inner wall of the slide block and sleeved on the outer side of the inner shaft core and the end groove core. The pusher plate is driven by a pneumatic push rod set on the slide block. The top and bottom of the pusher plate are located inside the upper guide groove and the lower guide groove, respectively.

[0007] In addition, the injection molding device for hollow blades of automotive air conditioning vents proposed in the above application may also have the following additional technical features: Specifically, the fixed mold includes a fixed base and a fixed cavity seat integrally formed at the bottom of the fixed base, and the upper mold cavity, upper guide groove and upper sliding groove are respectively formed at the bottom of the fixed cavity seat; The moving mold includes a movable base and a movable cavity seat integrally formed on the top of the movable base. The lower mold cavity, the lower guide groove, and the lower slide groove are respectively opened on the top of the movable cavity seat. The bottom of the fixed base is provided with an outer limiting guide post and a buffer guide post, and the top of the movable base is provided with an outer limiting guide hole and a buffer guide cylinder respectively corresponding to the positions of the outer limiting guide post and the buffer guide post. The outer limiting guide post and the buffer guide post are slidably connected to the inner wall of the outer limiting guide hole and the buffer guide cylinder respectively. The upper slide groove is symmetrically provided with inner limiting guide posts. The top of the slide block and the bottom wall of the lower slide groove are provided with inner limiting guide posts at the corresponding positions. The inner wall of the inner limiting guide post is threadedly connected to an inner limiting guide seat. The inner limiting guide post is slidably connected to the inner wall of the inner limiting guide seat. The movable base is sleeved on the outside of the outer limiting guide post, and the slide and movable cavity seat are both sleeved on the outside of the inner limiting guide post; The top of the inner limiting guide seat is provided with an annular mounting groove. The first spring and the second spring are both set in the annular mounting groove and fixedly connected to the groove wall. The first spring and the second spring are both sleeved on the outside of the inner limiting guide post. Both are high temperature resistant mold springs. Under normal conditions, the second spring pushes the slide block out of the upper end face of the movable cavity seat. During the mold closing and limiting process, the first spring is compressed and deformed first. When the moving mold continues to feed, the second spring is compressed and deformed synchronously. After the mold is locked, the first spring and the second spring are in a compressed state.

[0008] Specifically, sealing strips are embedded on the outer sides of the upper and lower mold cavity ports, except for the shaft groove and plate groove areas. Irregularly shaped sealing elements are embedded on the inner walls of the shaft groove and plate groove. Annular sealing rings are provided on the surfaces of the end groove core and the surface groove core at positions corresponding to the irregularly shaped sealing elements.

[0009] Specifically, the slide block is integrally formed with symmetrical waist-shaped blocks on its surface, and the inner walls of the upper and lower slide grooves are provided with limiting waist grooves corresponding to the positions of the waist-shaped blocks, with the two sets of limiting waist grooves arranged in opposite directions. In the mold-closed state, the waist-shaped block is adapted to the two sets of limiting waist grooves.

[0010] Specifically, the top of the movable base is bolted with a guide frame, and the guide frame abuts against the end face of the movable cavity seat away from the sliding groove.

[0011] Specifically, a first cooling channel is provided in both the fixed cavity seat and the movable cavity seat, and a second cooling channel is provided in both the inner shaft core, the end groove core, and the surface groove core. The first cooling channel and the second cooling channel are independent cooling circulation loops. The fixed cavity seat and the movable cavity seat are each provided with a tube seat at the end position corresponding to the first cooling channel and the second cooling channel, and a solenoid valve is provided on the tube seat; The coolant temperature in the second cooling channel is lower than that in the first cooling channel, with a temperature difference of 5-10℃.

[0012] Specifically, a sprue seat is provided on the top of the fixed mold, and an injection channel is provided inside the fixed mold. The input end of the injection channel is connected to the sprue seat, and the output end of the injection channel is located on the top wall inside the upper mold cavity, completely avoiding the vertical projection area of ​​the inner shaft core and the end slot core.

[0013] Specifically, the surface of the pusher plate is uniformly provided with guide shafts, the guide shafts are slidably connected to the inner wall of the slide block, and the end of the guide shaft extends out of the outer side of the slide block and is threaded with a nut; The top and bottom of the pusher plate are integrally formed and have chamfered edges.

[0014] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention abandons the traditional external side-pulling core structure and adopts an integrated layout that integrates various types of cores with an internal slide block. This significantly reduces external mold parts, simplifies the overall structure, and reduces the cost and difficulty of mold processing, assembly, and subsequent maintenance. The core is integrated on the slide block to form an integral structure with stronger rigidity. It is not easily shaken or deviated by the impact of the material flow during injection molding. At the same time, the end faces of the surface groove core and the end groove core abut against each other, forming a limit and fixation for the end groove core, which can resist the impact of melt and effectively ensure the molding dimensional accuracy of hollow structures such as shaft grooves and plate grooves, thereby improving the product qualification rate. The upper and lower ends of the push plate are respectively placed inside the upper guide groove and the lower guide groove to achieve a hidden arrangement and assist in supporting the inner shaft core and end groove core, maintaining the horizontal posture of the core, and ensuring that the core is accurately matched with the shaft groove and plate groove. 2. This device is equipped with two independent cooling circulation loops to implement zoned temperature control for the cavity and core. The core area encased in the melt is cooled at a low temperature, maintaining a stable temperature difference of 5-10℃ between the two. This can quickly remove the heat accumulated in the core, effectively improve the heat dissipation conditions of the core, and avoid molding defects such as sticking, surface shrinkage marks, and uneven cooling. The injection channel output end avoids the vertical projection area of ​​the core, which can prevent the melt from directly impacting the core, further reducing the risk of core deformation under stress and optimizing the injection filling effect. 3. The mold is equipped with an elastic pre-tightening mechanism consisting of a first spring and a second spring. When the mold is closed, the two springs are compressed in stages. After the mold is locked, they jointly provide vertical pre-tightening force, making the fixed mold and the moving mold fit more tightly and reducing the mold gap. The springs are high-temperature resistant mold springs, which are suitable for the high-temperature working environment of the injection molding workshop. They are not easy to fail or deform after long-term use, ensuring the continuous and stable operation of the elastic pre-tightening mechanism. Sealing strips, irregular-shaped seals and annular seals are respectively set at the cavity port, the inner wall of the slot, and the core mating position to form a multi-seal structure, which comprehensively improves the cavity sealing performance, effectively prevents melt leakage during injection molding, eliminates flash and overflow problems, and ensures the appearance quality of the product. 4. The slide block surface is provided with waist-shaped blocks, which, together with the limiting waist grooves on the inner wall of the slide, form an anti-rotation and stroke limiting structure, which can limit the circumferential rotation of the slide block during the sliding process. The mold is also equipped with multiple sets of guiding and limiting components such as outer limiting guide pillars, buffer guide pillars, and inner limiting guide pillars, which can accurately constrain the movement trajectory of the moving mold and the slide block. The dual structure works together to effectively lock the core position, improve the stability and guiding accuracy of the mold operation, reduce component wear, and extend the overall service life of the mold. 5. The pusher plate is equipped with a guide shaft and a locking nut, which can flexibly adjust the sliding stroke of the pusher plate according to different specifications of hollow blades. The mold can be adapted to the production of a variety of products, and its versatility is significantly improved. The upper and lower ends of the pusher plate are chamfered to reduce friction and scratches between the pusher plate and the guide groove, while avoiding stress concentration and improving the durability of the demolding mechanism. 6. A material guide rack is installed on the movable base, which can not only receive and guide the excess material during the injection molding process to avoid the accumulation of waste material affecting the normal operation of the mold and optimize the on-site production environment, but also achieve a counterweight effect by adjusting its own weight to maintain the overall balance of the mold operation. Attached Figure Description

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the injection molding device for hollow blades in an automotive air conditioning vent according to the present invention. Figure 2 This is a schematic diagram of the fixed mold structure in an injection molding device for hollow blades of an automotive air conditioning vent according to the present invention. Figure 3 This is a schematic diagram of the inner limiting guide post structure in an injection molding device for hollow blades of an automotive air conditioning vent according to the present invention. Figure 4 This is a schematic diagram of the moving mold structure in an injection molding device for hollow blades of an automotive air conditioning vent according to the present invention. Figure 5 This is a schematic diagram of the slide structure in an injection molding device for hollow blades of an automotive air conditioning vent according to the present invention. Figure 6 This is a schematic diagram of the hollow blade structure in an injection molding device for hollow blades used in automotive air conditioning vents according to the present invention.

[0017] As shown in the figure: 10. Hollowed-out blades; 1. Fixed mold; 11. Upper mold cavity; 12. Upper guide groove; 13. Upper sliding groove; 14. Fixed base; 141. Fixed cavity seat; 2. Moving mold; 21. Lower mold cavity; 22. Lower guide groove; 23. Lower sliding groove; 24. Movable base; 241. Movable cavity seat; 3. Slide seat; 31. First spring; 32. Second spring; 33. Waist-shaped block; 4. Inner shaft core; 41. Shaft groove; 5. End groove core; 51. Plate groove; 6. Surface groove core; 7. Push plate; 8. Pneumatic push rod; 100. External limiting guide post; 200. Buffer guide post; 300. Internal limiting guide post; 400. Sealing strip; 500. Irregularly shaped seal; 600. Annular sealing ring; 700. Material guide frame; 800. Sprue seat; 900. Guide shaft; 1000. Nut. Detailed Implementation

[0018] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the invention, and should not be construed as limiting the invention. Rather, embodiments of the invention include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0019] The following description, in conjunction with the accompanying drawings, describes an injection molding apparatus for hollow blades in an automotive air conditioning vent according to an embodiment of the present invention.

[0020] like Figures 1-6 As shown, an injection molding device for hollow blades of automotive air conditioning vents according to an embodiment of the present invention includes a fixed mold 1 and a moving mold 2 that are vertically aligned. The fixed mold 1 is fixedly set, and the moving mold 2 moves in an opening and closing motion in the vertical direction under the drive of a hydraulic telescopic cylinder. After the two molds are closed, they enclose a molding cavity for molding the hollow blades 10. The device also includes a slide block 3, an inner shaft core 4, an end groove core 5, a surface groove core 6, and a push plate 7. The bottom of the fixed mold 1 is provided with an upper mold cavity 11, an upper guide groove 12, and an upper sliding groove 13, respectively. The top of the moving mold 2 is provided with a lower mold cavity 21, a lower guide groove 22, and a lower sliding groove 23 that are adapted to the upper mold cavity 11, the upper guide groove 12, and the upper sliding groove 13. The slide block 3 is vertically slidably connected within the sliding space enclosed by the upper slide groove 13 and the lower slide groove 23. A first spring 31 is provided between the top of the slide block 3 and the inner top wall of the upper slide groove 13, and a second spring 32 is provided between the bottom of the slide block 3 and the inner bottom wall of the lower slide groove 23. The elastic force of the second spring 32 is greater than that of the first spring 31. The inner shaft core 4 and the end groove core 5 are integrally formed on the surface of the slide block 3. They extend into the shaft groove 41 and plate groove 51 formed by the combination of the upper mold cavity 11 and the lower mold cavity 21, respectively. The surface groove core 6 is integrally formed on the top wall of the upper mold cavity 11 and the bottom wall of the lower mold cavity 21, respectively. The upper and lower end faces of the surface groove core 6 are tightly fitted with the corresponding end faces of the end groove core 5. The pusher plate 7 is horizontally slidably connected to the inner wall of the slide block 3 and sleeved on the outer side of the inner shaft core 4 and the end groove core 5. The pusher plate 7 is driven by the pneumatic push rod 8 set on the slide block 3. The top and bottom of the pusher plate 7 are located inside the upper guide groove 12 and the lower guide groove 22, respectively.

[0021] It should be noted that temperature sensors and pressure sensors are respectively installed on the inner wall of the upper mold cavity 11 described in this embodiment to detect the temperature and pressure inside the molding cavity in real time. The above sensors and hydraulic telescopic cylinders are not shown in the attached drawings.

[0022] Specifically, when this device is working, the hydraulic telescopic cylinder drives the moving mold 2 to complete the mold closing action in the vertical direction, while the fixed mold 1 remains fixed. Under normal conditions, the second spring 32 pushes the slide 3 out of the upper end face of the movable cavity seat 241. During the upward movement of the moving mold 2, the slide 3, the inner shaft core 4, and the end groove core 5 are moved upward as a whole.

[0023] After the slide block 3 and the fixed mold 1 form a limiting fit, the moving mold 2 continues to feed slightly. During this process, the first spring 31 is compressed and deformed first. When the moving mold 2 continues to move, the second spring 32 is compressed and deformed synchronously. After the mold is completely locked, both the first spring 31 and the second spring 32 are in a compressed state, so that the fixed mold 1 and the moving mold 2 fit tightly together. The surface groove core 6 is fixed inside the upper mold cavity 11 and the lower mold cavity 21 respectively. Its end face is in close contact with the end groove core 5, forming a limiting fixation on the end groove core 5. The waist-shaped block 33 on the slide block 3 cooperates with the limiting waist groove on the inner side of the upper slide groove 13 and the lower slide groove 23 to restrict the circumferential rotation of the slide block 3 and limit the stroke. At the same time, the outer limiting guide post 100, the buffer guide post 200, and the inner limiting guide post 300 work together to guide and ensure that the movement trajectory of the moving mold 2 and the slide block 3 is accurate.

[0024] After the mold is closed, the fixed mold 1 and the moving mold 2 enclose a sealed molding cavity. The molten material is sent into the cavity through the sprue seat 800 on the top of the fixed mold 1 and the internal injection channel. The output end of the injection channel avoids the vertical projection area of ​​the inner shaft core 4 and the end groove core 5 to prevent the melt from directly impacting the core. During the injection cooling stage, the first cooling channel inside the fixed cavity seat 141 and the moving cavity seat 241 and the second cooling channel inside the inner shaft core 4, the end groove core 5 and the surface groove core 6 circulate independently. The solenoid valve in the pipeline controls the opening and closing of the water circuit. The coolant temperature in the second cooling channel is 5-10℃ lower than that in the first cooling channel to achieve differentiated heat dissipation in different zones. Sealing strips 400 and irregular seals 500 are respectively set at the cavity port, shaft groove 41 and plate groove 51. Annular sealing rings 600 are correspondingly set on the surface of the inner shaft core 4 and the end groove core 5 to prevent melt leakage and flash overflow throughout the process.

[0025] After the hollow blade 10 cools and sets, the hydraulic telescopic cylinder drives the moving mold 2 to descend vertically to complete the mold opening. The first spring 31 and the second spring 32 elastically reset in sequence. After the mold opens, the pneumatic push rod 8 drives the push plate 7 to slide horizontally along the inner wall of the slide block 3. The push plate 7 is sleeved on the outside of the inner shaft core 4 and the end groove core 5 to achieve the demolding operation. The push plate 7 slides on the guide shaft 900. The demolding stroke can be adjusted by the nut 1000 at the end of the guide shaft 900. When the mold is closed, the upper and lower ends of the push plate 7 are placed in the upper guide groove 12 and the lower guide groove 22 respectively, which are hidden and help support the core to maintain a horizontal posture. The chamfered part on the push plate 7 is easy to insert and reduces sliding friction.

[0026] In addition, the guide rack 700 fixed on the movable base 24 can receive the excess material from the injection molding process, and at the same time, it plays a counterweight role by its own weight to maintain the overall balance of the mold. The whole structure cycles and continuously completes the injection molding production of the hollow blade 10 of the car air conditioning vent.

[0027] In one embodiment of the present invention, such as Figures 1-6 As shown, the fixed mold 1 includes a fixed base 14 and a fixed cavity seat 141 integrally formed at the bottom of the fixed base 14. The upper mold cavity 11, the upper guide groove 12, and the upper sliding groove 13 are respectively opened at the bottom of the fixed cavity seat 141. The moving mold 2 includes a movable base 24 and a movable cavity seat 241 integrally formed on the top of the movable base 24. The lower mold cavity 21, the lower guide groove 22, and the lower slide groove 23 are respectively opened on the top of the movable cavity seat 241. The bottom of the fixed base 14 is provided with an outer limiting guide post 100 and a buffer guide post 200 respectively. The top of the movable base 24 is provided with an outer limiting guide hole and a buffer guide cylinder respectively corresponding to the positions of the outer limiting guide post 100 and the buffer guide post 200. The outer limiting guide post 100 and the buffer guide post 200 are slidably connected to the inner wall of the outer limiting guide hole and the buffer guide cylinder respectively. The upper slide groove 13 is symmetrically provided with inner limit guide posts 300. The top of the slide block 3 and the bottom wall of the lower slide groove 23 are provided with inner limit guide holes corresponding to the positions of the inner limit guide posts 300. The inner wall of the inner limit guide hole is threadedly connected to the inner limit guide seat. The inner limit guide post 300 is slidably connected to the inner wall of the inner limit guide seat. The movable base 24 is fitted on the outside of the outer limiting guide post 100, and the slide 3 and the movable cavity seat 241 are both fitted on the outside of the inner limiting guide post 300. The top of the inner limit guide seat is provided with an annular mounting groove. The first spring 31 and the second spring 32 are both set in the annular mounting groove and fixedly connected to the groove wall. The first spring 31 and the second spring 32 are both sleeved on the outside of the inner limit guide post 300. Both are high temperature resistant mold springs. Under normal conditions, the second spring 32 pushes the slide block 3 out of the upper end face of the movable cavity seat 241. During the mold closing and limiting process, the first spring 31 is first compressed and deformed. When the moving mold 2 continues to feed, the second spring 32 is compressed and deformed synchronously. After the mold is closed and locked, the first spring 31 and the second spring 32 are in a compressed state.

[0028] Specifically, the fixed mold 1 consists of a fixed base 14 and a fixed cavity seat 141, and the moving mold 2 consists of a movable base 24 and a movable cavity seat 241. The fixed cavity seat 141 and the movable cavity seat 241 are respectively provided with mutually compatible mold cavities and grooves, providing the basic structure for mold forming and sliding of the slide 3. The outer limiting guide post 100 and the buffer guide post 200 on the fixed base 14 cooperate with the corresponding outer limiting guide hole and buffer guide cylinder on the movable base 24. The inner limiting guide post 300 in the upper sliding groove 13 slides in cooperation with the slide 3 and the inner limiting guide hole and inner limiting guide seat at the lower sliding groove 23, providing multiple sets of guides. The structure works in concert to precisely constrain the movement direction of the moving mold 2 and the slide block 3, preventing deviation during operation. The first spring 31 and the second spring 32 are installed in the annular mounting groove of the inner limit guide and are sleeved on the outside of the inner limit guide post 300. The high temperature resistant material can adapt to the high temperature working environment of the mold. Under normal conditions, the second spring 32 lifts the slide block 3. During the mold closing process, the first spring 31 is compressed first. After the moving mold 2 continues to move, the second spring 32 deforms synchronously. After the mold is closed, the two springs remain compressed. Through step-by-step elastic pre-tightening, the various parts of the mold fit together firmly, improving the overall mold closing accuracy and running stability.

[0029] In one embodiment of the present invention, such as Figures 1-6 As shown, sealing strips 400 are embedded on the outer side of the ports of the upper mold cavity 11 and the lower mold cavity 21, except for the areas of the shaft groove 41 and the plate groove 51. Irregularly shaped sealing elements 500 are embedded on the inner walls of the shaft groove 41 and the plate groove 51. Annular sealing rings 600 are provided on the surfaces of the end groove core 5 and the surface groove core 6 at the positions corresponding to the irregularly shaped sealing elements 500.

[0030] Specifically, this structure incorporates multiple sealing components at various locations within the mold cavity: sealing strips 400 are installed in the non-shaft groove 41 and plate groove 51 areas of the upper mold cavity 11 and lower mold cavity 21; irregularly shaped sealing elements 500 are embedded in the inner walls of the shaft groove 41 and plate groove 51; and annular sealing rings 600 are added at corresponding positions of the end groove core 5 and the surface groove core 6. The multi-level sealing structure works together to provide all-round sealing of the gaps between the molded cavity and the slots. During injection molding, it can effectively prevent molten plastic from overflowing from the mold gaps, eliminating defects such as flash and overflow, and ensuring stable internal pressure within the mold cavity. This not only improves the appearance quality of the hollowed-out blades but also ensures a continuous and stable injection molding process.

[0031] In one embodiment of the present invention, such as Figures 1-6 As shown, the slide block 3 has a waist-shaped block 33 integrally formed symmetrically on its surface. The inner walls of the upper slide groove 13 and the lower slide groove 23 are provided with limiting waist grooves corresponding to the position of the waist-shaped block 33. The two sets of limiting waist grooves are arranged in opposite directions. In the mold-closed state, the waist-shaped block 33 is adapted to the two sets of limiting waist grooves.

[0032] Specifically, the slide block 3 has symmetrically integrally formed waist-shaped blocks 33 on both sides. The upper slide groove 13 and the lower slide groove 23 have correspondingly reversed limiting waist grooves on their inner walls. After the mold is closed, the waist-shaped blocks 33 and the limiting waist grooves fit together. This combination structure constitutes the anti-rotation and stroke limiting mechanism of the slide block 3, which can limit the slide block 3 from rotating circumferentially and shifting left and right during vertical sliding. It locks the working position of the slide block 3 and the inner shaft core 4 and end groove core 5 integrated thereon, effectively avoiding core posture deviation, ensuring accurate alignment of the core with the shaft groove 41 and plate groove 51, improving the stability and motion accuracy of the mold operation, and ensuring the consistency of the forming dimensions of the hollow blade 10 groove structure.

[0033] In one embodiment of the present invention, such as Figures 1-6 As shown, the top of the movable base 24 is bolted with a guide frame 700, which abuts against the end face of the movable cavity seat 241 away from the sliding groove 23.

[0034] Specifically, the guide frame 700 is fixedly installed on the top of the movable base 24 by bolts. The guide frame 700 abuts against the end face of the movable cavity seat 241 away from the sliding groove 23. This component can receive and guide the excess material and waste generated during the injection molding operation, prevent waste from accumulating on the mold surface or moving area, avoid debris affecting the normal opening and closing and sliding of the mold, and ensure a clean production environment and smooth equipment operation. On the other hand, the guide frame 700 can adjust its own counterweight according to the actual working conditions to balance the overall weight of the moving mold 2, reduce the off-center load phenomenon during the mold operation, make the moving mold 2 move up and down more smoothly, reduce the wear of the guide and sliding parts, and extend the service life of the mold.

[0035] In one embodiment of the present invention, such as Figures 1-6 As shown, a first cooling channel is provided in both the fixed cavity seat 141 and the movable cavity seat 241, and a second cooling channel is provided in both the inner shaft core 4, the end groove core 5, and the surface groove core 6. The first cooling channel and the second cooling channel are independent cooling circulation loops. The fixed cavity seat 141 and the movable cavity seat 241 are each provided with a tube seat at the end position corresponding to the first cooling channel and the second cooling channel, and a solenoid valve is provided on the tube seat; The coolant temperature in the second cooling channel is lower than that in the first cooling channel, with a temperature difference of 5-10℃.

[0036] Specifically, the fixed cavity seat 141 and the movable cavity seat 241 are equipped with a first cooling channel, and the inner shaft core 4, the end groove core 5, and the surface groove core 6 are equipped with a second cooling channel. The two sets of cooling pipes are independent of each other, forming a zoned cooling circulation system. Each cooling channel is equipped with a pipe seat and a solenoid valve at its end. The solenoid valve is used to control the opening and closing of the cooling water circuit to realize the automated management of the cooling process. During operation, the temperature of the coolant in the second cooling channel is 5-10℃ lower than that in the first cooling channel. This enhances the cooling of the core area that is covered by molten material and has poor heat dissipation conditions. This differentiated temperature control method can quickly dissipate the heat accumulated in the core, avoid problems such as product sticking, surface shrinkage, and uneven cooling caused by high core temperature, and at the same time ensure that the cooling rhythm of the cavity body is reasonable, thereby improving the overall molding quality of the injection molded parts and the stability of continuous mold operation.

[0037] In one embodiment of the present invention, such as Figures 1-6 As shown, a sprue seat 800 is provided on the top of the fixed mold 1, and an injection channel is provided inside the fixed mold 1. The input end of the injection channel is connected to the sprue seat 800, and the output end of the injection channel is located on the top wall inside the upper mold cavity 11, and completely avoids the vertical projection area of ​​the inner shaft core 4 and the end groove core 5.

[0038] Specifically, a sprue seat 800 is mounted on the top of the fixed mold 1, which connects to the injection channel inside the fixed mold 1. The channel outlet is located on the top wall inside the upper mold cavity 11, avoiding the vertical projection range of the inner shaft core 4 and the end groove core 5. During injection molding, the molten plastic enters the injection channel through the sprue seat 800 and is then smoothly transported into the molding cavity. This layout can prevent the molten material from directly impacting the core, effectively reducing the risk of deformation and displacement of the core due to material impact, protecting the core structure and positional accuracy, while optimizing the material flow direction, making the filling inside the cavity more uniform, and improving the overall molding quality of the hollow blade 10.

[0039] In one embodiment of the present invention, such as Figures 1-6 As shown, guide shafts 900 are evenly arranged on the surface of the pusher plate 7. The guide shafts 900 are slidably connected to the inner wall of the slide block 3. The end of the guide shaft 900 extends out of the outer side of the slide block 3 and is threadedly connected to a nut 1000. The top and bottom of the push plate 7 are integrally formed and have chamfered edges.

[0040] It should be noted that, in this embodiment, the top and bottom of the pusher plate 7 are vertically slidably connected to the inner walls of the upper guide groove 12 and the lower guide groove 22, respectively.

[0041] It should also be noted that the chamfered portion described in this embodiment is not shown in the diagram.

[0042] Specifically, the pusher plate 7 is mounted on the inner wall of the slide block 3 via the guide shaft 900. The guide shaft 900 can slide relative to the slide block 3. Its extended end is locked and positioned with a nut 1000. Rotating the nut 1000 can adjust the sliding stroke of the pusher plate 7 to adapt to the demolding requirements of workpieces of different specifications. The upper and lower ends of the pusher plate 7 are integrally machined with chamfered parts, which slide vertically with the inner walls of the upper guide groove 12 and the lower guide groove 22, respectively. The chamfered structure can reduce sliding friction, avoid stress concentration, and improve the durability of the parts. During operation, the pusher plate 7 relies on the guide shaft 900 and the guide groove to achieve smooth guiding and sliding, and complete the product demolding operation. The overall structure moves smoothly and is easy to adjust, effectively ensuring the stability and reliability of the demolding process.

[0043] In summary, the injection molding device for hollow blades of automotive air conditioning vents according to an embodiment of the present invention adopts an integrated core structure with a built-in slide block 3, combined with multiple seals, zoned cooling and step-by-step pre-tightening springs, which effectively improves molding accuracy and eliminates defects such as overflow, shrinkage marks and sticking. Multiple sets of guide anti-rotation structures ensure stable operation of the equipment. The adjustable push plate 7 is compatible with a variety of products. The guide frame 700 has both guiding and counterweight functions. The overall structure is simple, versatile and has a longer service life.

[0044] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0045] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0046] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An injection molding device for hollow blades in an automotive air conditioning vent, comprising a fixed mold (1) and a moving mold (2) that are vertically aligned, wherein the fixed mold (1) is fixedly installed, and the moving mold (2) is driven by a hydraulic telescopic cylinder to open and close in the vertical direction, and the two molds close together to form a molding cavity for molding hollow blades (10), characterized in that, It also includes a slide (3), an inner shaft core (4), an end groove core (5), a surface groove core (6), and a pusher plate (7); The bottom of the fixed mold (1) is provided with an upper mold cavity (11), an upper guide groove (12), and an upper sliding groove (13), and the top of the moving mold (2) is provided with a lower mold cavity (21), a lower guide groove (22), and a lower sliding groove (23) that are adapted to the upper mold cavity (11), the upper guide groove (12), and the upper sliding groove (13). The slide block (3) is vertically slidably connected within the sliding space enclosed by the upper slide groove (13) and the lower slide groove (23). A first spring (31) is provided between the top of the slide block (3) and the inner top wall of the upper slide groove (13), and a second spring (32) is provided between the bottom of the slide block (3) and the inner bottom wall of the lower slide groove (23). The elastic force of the second spring (32) is greater than that of the first spring (31). The inner shaft core (4) and the end groove core (5) are integrally formed on the surface of the slide block (3). They extend into the shaft groove (41) and plate groove (51) formed by the combination of the upper mold cavity (11) and the lower mold cavity (21). The surface groove core (6) is integrally formed on the top wall of the upper mold cavity (11) and the bottom wall of the lower mold cavity (21). The upper and lower end faces of the surface groove core (6) are closely fitted with the corresponding end faces of the end groove core (5). The pusher plate (7) is horizontally slidably connected to the inner wall of the slide block (3) and sleeved on the outer side of the inner shaft core (4) and the end groove core (5). The pusher plate (7) is driven by the pneumatic push rod (8) set on the slide block (3). The top and bottom of the pusher plate (7) are located inside the upper guide groove (12) and the lower guide groove (22), respectively.

2. The injection molding device for hollow blades of automotive air conditioning vents according to claim 1, characterized in that, The fixed mold (1) includes a fixed base (14) and a fixed cavity seat (141) integrally formed at the bottom of the fixed base (14). The upper mold cavity (11), upper guide groove (12), and upper sliding groove (13) are respectively opened at the bottom of the fixed cavity seat (141). The moving mold (2) includes a movable base (24) and a movable cavity seat (241) integrally formed on the top of the movable base (24). The lower mold cavity (21), the lower guide groove (22), and the lower slide groove (23) are respectively opened on the top of the movable cavity seat (241). The fixed base (14) is provided with an outer limiting guide post (100) and a buffer guide post (200) at its bottom. The movable base (24) is provided with an outer limiting guide hole and a buffer guide cylinder at the top corresponding to the positions of the outer limiting guide post (100) and the buffer guide post (200). The outer limiting guide post (100) and the buffer guide post (200) are slidably connected to the inner wall of the outer limiting guide hole and the buffer guide cylinder, respectively. The upper sliding groove (13) is symmetrically provided with inner limiting guide posts (300) on the inner top wall. The top of the sliding block (3) and the bottom wall of the lower sliding groove (23) are provided with inner limiting guide holes corresponding to the inner limiting guide posts (300). The inner wall of the inner limiting guide hole is threadedly connected to an inner limiting guide seat. The inner limiting guide post (300) is slidably connected to the inner wall of the inner limiting guide seat. The movable base (24) is sleeved on the outside of the outer limiting guide post (100), and the slide (3) and the movable cavity seat (241) are both sleeved on the outside of the inner limiting guide post (300); The top of the inner limiting guide seat is provided with an annular mounting groove. The first spring (31) and the second spring (32) are both set in the annular mounting groove and fixedly connected to the groove wall. The first spring (31) and the second spring (32) are both sleeved on the outside of the inner limiting guide post (300). Both are high temperature resistant mold springs. Under normal conditions, the second spring (32) pushes the slide (3) out of the upper end face of the movable cavity seat (241). During the mold closing and limiting process, the first spring (31) is first compressed and deformed. When the moving mold (2) continues to feed, the second spring (32) is compressed and deformed synchronously. After the mold is closed and locked, the first spring (31) and the second spring (32) are in a compressed state.

3. The injection molding device for hollow blades of automotive air conditioning vents according to claim 1, characterized in that, The outer sides of the upper mold cavity (11) and lower mold cavity (21) are fitted with sealing strips (400) except for the shaft groove (41) and plate groove (51) areas. The inner walls of the shaft groove (41) and plate groove (51) are fitted with irregular seals (500). The surfaces of the end groove core (5) and the surface groove core (6) are provided with annular sealing rings (600) at the positions corresponding to the irregular seals (500).

4. The injection molding device for hollow blades of automotive air conditioning vents according to claim 1, characterized in that, The slide block (3) is symmetrically and integrally formed with waist-shaped blocks (33). The inner walls of the upper slide groove (13) and the lower slide groove (23) are provided with limiting waist grooves corresponding to the waist-shaped blocks (33). The two sets of limiting waist grooves are arranged in opposite directions. In the mold-closed state, the waist-shaped block (33) is adapted to the two sets of limiting waist grooves.

5. The injection molding device for hollow blades of automotive air conditioning vents according to claim 2, characterized in that, The top of the movable base (24) is bolted to a guide frame (700), which abuts against the end face of the movable cavity seat (241) away from the sliding groove (23).

6. The injection molding device for hollow blades of automotive air conditioning vents according to claim 2, characterized in that, The fixed cavity seat (141) and the movable cavity seat (241) are each provided with a first cooling channel, and the inner shaft core (4), the end groove core (5), and the surface groove core (6) are each provided with a second cooling channel. The first cooling channel and the second cooling channel are independent cooling circulation loops. The fixed cavity seat (141) and the movable cavity seat (241) are each provided with a tube seat at the end position of the first cooling channel and the second cooling channel, and a solenoid valve is provided on the tube seat. The coolant temperature in the second cooling channel is lower than that in the first cooling channel, with a temperature difference of 5-10℃.

7. The injection molding device for hollow blades of automotive air conditioning vents according to claim 1, characterized in that, The fixed mold (1) is provided with a sprue seat (800) on the top. An injection channel is provided inside the fixed mold (1). The input end of the injection channel is connected to the sprue seat (800). The output end of the injection channel is located on the top wall inside the upper mold cavity (11) and completely avoids the vertical projection area of ​​the inner shaft core (4) and the end groove core (5).

8. The injection molding apparatus for hollow blades of automotive air conditioning vents according to claim 1, characterized in that, The pusher plate (7) is uniformly provided with guide shafts (900), the guide shafts (900) are slidably connected to the inner wall of the slide block (3), and the end of the guide shaft (900) extends out of the outside of the slide block (3) and is threaded with a nut (1000). The pusher plate (7) has chamfered edges integrally formed at the top and bottom.

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