Automobile instrument frame injection mold and method

Abstract

The invention relates to the technical field of automobile part injection molding, and discloses an automobile instrument frame injection mold and method.The automobile instrument frame injection mold comprises a driving unit, an injection molding unit arranged on one side of the driving unit and a plastic melting unit arranged on one side of the injection molding unit; the plastic melting packing auger is arranged at the bottom of the feeding barrel, the injection molding head is arranged on one side of the plastic melting packing auger, the injection molding nozzle is arranged at the tail end of the injection molding head, the plastic melting injection molding unit comprises a movable mold and a static mold, the movable mold is arranged on one side of the driving unit, and the static mold is arranged on one side of the plastic melting unit. When the injection molding head moves forwards, the rotating assembly is extruded to drive the fan-shaped plugging plate to automatically contract to open the runner; and during retreating, the spring resets to drive the plugging plate to combine and seal the runner, and the material ejecting module is triggered synchronously. Manual intervention is not needed in the whole process, batch automatic production of the automobile instrument frames is adapted, and production continuity and efficiency are remarkably improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of automobile part injection molding, in particular to an automobile instrument frame injection mold and method. BACKGROUND

[0002] As a key component of automobile interior decoration, the automobile instrument frame has strict requirements on forming precision, appearance integrity and production efficiency, and the performance of the injection mold directly determines the product qualification rate and batch production capacity. The existing technology in the field of automobile instrument frame injection currently has significant defects in the two core links of residual root processing and flow channel sealing, which is difficult to adapt to the requirements of automation and high-precision production.

[0003] In the aspect of residual root processing, the existing mold generally does not set an automatic ejection mechanism, and the injection residual root in the flow channel needs to be "hardly separated" when the product is demolded, that is, relying on the pulling force of the product demolding to forcibly pull the residual root out of the flow channel. This method not only easily causes the residual root to break and the remaining part to be stuck in the flow channel, which needs to be manually stopped and disassembled for cleaning, seriously slowing down the production rhythm, but also may damage the inner wall of the flow channel due to the pulling force during separation, destroy the precision of the flow channel, and cause the melt to flow poorly after long-term use, resulting in defects such as material shortage and shrinkage of the product. At the same time, burrs are easily generated at the connection part of the residual root and the product, increasing the cost of the subsequent edge trimming process.

[0004] In the aspect of flow channel sealing, the existing technology lacks a special sealing mechanism. After injection molding, the flow channel is in an open state, and foreign dust and impurities are easy to enter the inside of the flow channel, which will mix into the melt during the next injection molding, causing appearance problems such as impurity points and bubbles in the product, affecting the interior decoration quality of the instrument frame; and without sealing protection, the residual melt in the flow channel is easy to cool and solidify into a hard block, further increasing the difficulty of residual root separation, forming a vicious cycle of "sealing loss-residual root difficult to handle", which seriously restricts the batch production efficiency and product quality stability of the automobile instrument frame. SUMMARY

[0005] In view of the problems in the prior art that the automobile instrument frame injection mold lacks an automatic residual root ejection mechanism, the residual root needs to be hard separated with the product, which is easy to be stuck and broken and needs to be cleaned manually, and there is no flow channel sealing mechanism, which is easy to cause melt leakage and impurity invasion, affecting the production efficiency and product quality, an automobile instrument frame injection mold is proposed.

[0006] The purpose is to provide a mold integrating a pure mechanical linkage residual root automatic ejection and flow channel sealing mechanism, to realize efficient residual root separation, no leakage and no impurities in the flow channel, reduce manual intervention and faults, simplify the structure, and ultimately improve the production efficiency and qualification rate of the automobile instrument frame.

[0007] The technical scheme of the present application is an automobile instrument frame injection mold, which comprises a driving unit, an injection unit arranged on one side of the driving unit, and a melting unit arranged on one side of the injection unit, wherein the melting unit comprises a feeding barrel, a melting auger arranged at the bottom of the feeding barrel, an injection head arranged on one side of the melting auger, and an injection nozzle arranged at the end of the injection head; the injection unit comprises a movable mold and a stationary mold, the movable mold is arranged on one side of the driving unit, and the stationary mold is arranged on one side of the melting unit; the injection unit further comprises a feeding nozzle arranged in the stationary mold, a feeding groove in the shape of a funnel is formed in the middle of the feeding nozzle, a blocking module and a material ejecting module are arranged on one side of the feeding nozzle, and a flow channel is formed on the other side of the feeding nozzle. The blocking module is used to block the flow channel after the injection head completes injection and leaves, and comprises an extrusion rotating assembly and a blocking assembly arranged on one side of the extrusion rotating assembly; the material ejecting module is used to eject the injection residue remaining in the flow channel after injection is completed, facilitating material removal. The extrusion rotating assembly comprises a push plate arranged on one side of the injection head, a plurality of extrusion plates arranged on one side of the push plate and penetrating through one side of the feeding nozzle, a rotating groove formed in the interior of the feeding nozzle, a rotating ring arranged in the rotating groove, a rotating plate arranged on one side of the rotating ring, a spring arranged on one side of the rotating plate, the spring being sleeved on the rotating ring, a push ring arranged on one side of the spring, the push ring and the push plate being in abutment, a plurality of limiting blocks arranged in an annular array on the circumferential side of the push ring, a plurality of limiting grooves matched with the limiting blocks and formed in the rotating groove, the limiting blocks being limited to slide in the limiting grooves, a plurality of rotating rods arranged in an annular array on the inner side wall of the push ring, a plurality of rotating grooves matched with the rotating rods and formed on the outer wall of the rotating ring, and the rotating rods being arranged in the rotating grooves.

[0008] Further, the blocking assembly comprises a moving groove formed on one side of the rotating groove, a plurality of blocking plates arranged in the moving groove, a moving rod arranged on one side of the blocking plate, an arc-shaped groove matched with the moving rod and formed on the rotating plate, the moving rod being slidably connected in the arc-shaped groove, a rectangular block arranged on the other side of the blocking plate, a rectangular groove formed on one side of the moving groove, and the rectangular block being limited to slide in the rectangular groove.

[0009] Further, the plurality of blocking plates are in the shape of a sector, and when combined, they form a complete circle.

[0010] Further, the material ejecting module comprises a folding groove formed on one side of the blocking plate close to the flow channel, a fixing rod arranged in one side of the folding groove, an ejecting plate arranged on the fixing rod, and a torsional spring arranged between the ejecting plate and the fixing rod.

[0011] Further, the folding groove is formed in an inclined manner for folding and storing the ejecting plate.

[0012] Further, the end of the ejection plate is inclined, and a curved ejection groove is arranged on the side of the ejection plate close to the fixed rod, and the side edge of the ejection groove is arranged vertically to the side of the ejection plate.

[0013] Further, the outer edge of the injection nozzle has the same inclination as the feeding groove, and the inner diameter of the end of the injection nozzle is smaller than the inner diameter of the side of the flow channel close to the injection nozzle.

[0014] Another object of the present application is to provide an injection molding method for an automobile instrument frame, which aims to achieve automatic and efficient stripping of residual roots to avoid sticking and fracture, ensure sealing of the flow channel throughout the process to prevent leakage of melt and intrusion of impurities, simplify manual intervention, adapt to batch automatic production, and ultimately improve injection molding efficiency, product qualification rate, and production stability.

[0015] To achieve the above object, the present application provides the following technical solution: an injection molding method for an automobile instrument frame, comprising the following steps: Preparation and mold closing: adding raw materials to the feeding barrel of the melt molding unit, preheating the melt molding auger, driving the unit to close and lock the movable mold and the stationary mold, and moving the injection head to make the injection nozzle fit the feeding groove of the feeding nozzle; Injection molding: the injection head triggers the extrusion and rotation assembly of the blocking module to drive the blocking assembly to open the flow channel; the melt molding auger melts the raw materials into melt, which is injected into the cavity through the injection head, the injection nozzle, and the flow channel; Pressure maintaining and cooling: maintaining pressure to compensate, and then starting the cooling system, and the melt in the cavity and the flow channel is solidified into a product and a residual root, respectively; Blocking and ejection of residual roots: the injection head retreats to separate, the blocking module resets to block the flow channel, and the ejection module operates to eject the injection residual roots in the flow channel; Mold opening cycle: the driving unit drives the movable mold to open, the product and the residual root are taken out, the mold is reset, and the next round of production is started.

[0016] Further, when the injection head is separated, the residual root hardens and remains in the flow channel, and the flow channel is a continuous conical surface with a taper angle of 3°-8°, the residual root is quickly ejected by the ejection module, and the product and the residual root are easily discharged.

[0017] Compared with the prior art, the present application has the following advantages: 1. Through the pure mechanical linkage of the injection head, the blocking module, and the ejection module, no additional electrical or hydraulic elements are needed, the structure is greatly simplified, and the risk of failure is reduced. When the injection head moves forward, the extrusion and rotation assembly drives the fan-shaped blocking plate to automatically shrink to open the flow channel; when it retreats, the spring resets to drive the blocking plate to combine to block the flow channel, and simultaneously triggers the ejection module. No manual intervention is needed throughout the process, which is suitable for batch automatic production of automobile instrument frames, avoids downtime caused by failure of additional power elements, and ensures efficient connection of each round of injection and stripping cycle through precise guidance of limit blocks and arc grooves, thereby significantly improving production continuity and efficiency.

[0018] 2. Through the multiple sealing structure to prevent melt leakage and impurity intrusion, guarantee the injection quality and prolong the service life of the part. The injection nozzle and the feeding groove are seamlessly connected in a conical shape, cooperating with the design of the gradual change of the inner diameter of the end of the injection nozzle, blocking the reverse backflow of the melt to form a jam; the fan-shaped blocking plate is combined into a complete circle, with no gap when blocking, preventing residual melt from overflowing and impurities from entering the flow channel. At the same time, the blocking plate is retracted in advance to avoid contact with the injection nozzle, preventing the injection nozzle from being scratched, reducing the replacement frequency of the vulnerable parts, reducing maintenance costs, and ensuring long-term stable production of high-quality instrument frames.

[0019] 3. The top material module is linked with the blocking module for instantaneous impact design, solving the problem of traditional mold residual root jam. When the blocking plate is reset, the ejection plate is pressed and stored with the moving groove, and after the ejection groove is separated from the constraint, the torsional spring releases the potential energy to drive the ejection plate to impact the residual root at the inclined end, cooperating with the flow channel design to form axial thrust and radial component force, efficiently breaking the residual root adhesion. No manual cleaning of residual roots is required, avoiding flow channel blockage caused by residual root breakage and residue, shortening the single production cycle, ensuring the flow channel to be clean after each injection, and further improving the production efficiency and product qualification rate of automobile instrument frames. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present application; Figure 2 It is a schematic diagram of the overall three-dimensional structure of the present application; Figure 3 It is a schematic diagram of the overall three-dimensional structure of the present application; Figure 4 It is a schematic diagram of the overall three-dimensional structure of the present application; Figure 3 It is a schematic diagram of the overall three-dimensional structure of the present application; Figure 5 It is a schematic diagram of the overall three-dimensional structure of the present application; Figure 6 It is a schematic diagram of the overall three-dimensional structure of the present application; Figure 7 It is a schematic diagram of the overall three-dimensional structure of the present application; Figure 8 It is a schematic diagram of the overall three-dimensional structure of the present application; Figure 9 It is a schematic diagram of the overall three-dimensional structure of the present application; Figure 10 It is a schematic diagram of the overall three-dimensional structure of the present application; Figure 11 It is a schematic diagram of the overall three-dimensional structure of the present application; Figure 12The overall structure of the ejection plate of the present application is shown in the schematic diagram.

[0021] In the figure: 1, drive unit; 11, injection molding unit; 12, melt molding unit; 13, melt molding auger; 14, injection molding head; 15, injection molding nozzle; 16, feed nozzle; 17, feed slot; 18, flow channel; 2, extrusion rotating assembly; 21, push plate; 22, extrusion plate; 23, rotating groove; 24, rotating ring; 25, rotating plate; 26, spring; 27, push ring; 28, limiting block; 29, limiting groove; 210, rotating rod; 211, rotating groove; 3, blocking assembly; 31, moving groove; 32, blocking plate; 33, moving rod; 34, arc-shaped groove; 35, rectangular block; 36, rectangular groove; 4, ejection module; 41, folding groove; 42, fixed rod; 43, ejection plate; 5, ejection groove. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0023] Example 1, refer to Figures 1-12 For the first embodiment of the present application, an automobile instrument frame injection mold is provided, which comprises a drive unit 1, an injection molding unit 11 arranged on one side of the drive unit 1, and a melt molding unit 12 arranged on one side of the injection molding unit 11. The melt molding unit 12 comprises a feeding barrel, a melt molding auger 13 installed at the bottom of the feeding barrel, an injection molding head 14 installed on one side of the melt molding auger 13, and an injection molding nozzle 15 installed at the end of the injection molding head 14. The injection molding unit 11 comprises a moving die and a stationary die, the moving die is arranged on one side of the drive unit 1, and the stationary die is arranged on one side of the melt molding unit 12. The injection molding unit 11 further comprises a feed nozzle 16 installed in the stationary die, a feed slot 17 in the form of a funnel is formed in the middle of the feed nozzle 16, a blocking module and an ejection module 4 arranged on one side of the feed nozzle 16, and a flow channel 18 formed on the other side of the feed nozzle 16. The blocking module is used to block the flow channel 18 after the injection molding head 14 is completed, which comprises an extrusion rotating assembly 2 and a blocking assembly 3 arranged on one side of the extrusion rotating assembly 2. The ejection module 4 is used to eject the injection residue remaining in the flow channel 18 after the injection is completed, which facilitates the stripping.

[0024] The extrusion and rotation assembly 2 comprises a pushing plate 21 fixedly connected to one side of the injection head 14, a plurality of extrusion plates 22 fixedly connected to one side of the pushing plate 21 and penetrating one side of the feeding nozzle 16, a rotating groove 23 formed in the feeding nozzle 16, a rotating ring 24 rotatably connected in the rotating groove 23, a rotating plate 25 fixedly connected to one side of the rotating ring 24, a spring 26 abutting to one side of the rotating plate 25, the spring 26 being sleeved on the rotating ring 24, a pushing ring 27 abutting to one side of the spring 26, the pushing ring 27 abutting to the pushing plate 21, a plurality of limiting blocks 28 fixedly connected in an annular array to the periphery of the pushing ring 27, a plurality of limiting grooves 29 formed in the rotating groove 23 and matched with the limiting blocks 28, the limiting blocks 28 being limitedly slid in the limiting grooves 29, a plurality of rotating rods 210 fixedly connected in an annular array to the inner side wall of the pushing ring 27, and a plurality of rotating grooves 211 formed in the outer wall of the rotating ring 24 and matched with the rotating rods 210, the rotating rods 210 being slidably connected in the rotating grooves 211.

[0025] Specifically, when the automobile instrument frame is injection molded, the whole injection molding process is as follows: raw materials are added to the feeding barrel of the melting unit 12, the melting auger 13 is preheated, the driving unit 1 drives the movable mold and the fixed mold to be combined and locked, the injection head 14 moves forward so that the injection nozzle 15 is attached to the feeding groove 17 of the feeding nozzle 16; the extrusion and rotation assembly 2 of the plugging module is triggered by the injection head 14, the driving plugging assembly 3 is opened, the melting auger 13 melts the raw materials into melt, which is injected into the cavity through the injection head 14, the injection nozzle 15 and the flow channel 18; the pressure is maintained and the melt in the cavity and the flow channel 18 is solidified into a product and a residual root, respectively; the injection head 14 retreats and separates, the plugging module resets to plug the flow channel 18, the ejection module 4 acts to eject the injection residual root in the flow channel 18; the driving unit 1 drives the movable mold to be opened, the product and the residual root are taken out, the mold is reset, and the next round of production is started.

[0026] When the injection head 14 moves, the push plate 21 and the extrusion plate 22 are driven to move, the extrusion plate 22 extrudes the push ring 27 through one side of the feeding nozzle 16, the push ring 27 is axially compressed by the compression spring 26 under the limiting action of the limiting groove 29 and the limiting block 28, and the rotating rod 210 is synchronously driven to slide in the rotating groove 211, so that the rotating ring 24 drives the rotating plate 25 to synchronously rotate, the rotating plate 25 drives the blocking assembly 3 to synchronously retract when rotating, the blocking assembly 3 is opened, the injection nozzle 15 enters the feeding groove 17, and the injection nozzle 15 is pressed against the feeding groove 17, so that the plastic in a molten state after being heated is pressurized into the flow passage of the feeding nozzle 16, and the product is generated under the joint action of the moving die and the static die. When the injection cooling is completed, the injection head 14 retreats, the extrusion plate 22 gradually retreats, the spring 26 is reset, the rotating ring 24 and the rotating plate 25 are reset and rotated, and finally the blocking assembly 3 is reset to block the feeding groove 17. In this process, the stripping assembly is triggered to suddenly impact the residual root of the product, so that the residual root is separated from the flow channel 18, and rapid stripping is realized.

[0027] The blocking module in the device is linked with the injection head 14 through the extrusion rotating assembly 2, so that the flow channel 18 is automatically opened during injection, and the melt is smoothly injected; the flow channel 18 is automatically reset after injection, which can prevent foreign matters from entering the flow channel 18 to pollute the next injection, can avoid that the residual melt in the flow channel 18 overflows to cause raw material waste or mold pollution, reduces the cleaning cost in the later period, realizes automatic blocking of the flow channel 18, guarantees cleaning and leakage prevention, the stripping module 4 is linked with the blocking module to be triggered, the residual root is subjected to a pushing force at the same time when the flow channel 18 is blocked, the residual root can be quickly stripped in cooperation with the design of the flow channel 18, the problems of residual root jamming and difficult stripping in the traditional mold are completely solved, the downtime caused by manual cleaning of the residual root is reduced, the production continuity is improved, the residual root is accurately pushed out, the jamming is avoided, and the injection and product stripping efficiency are improved.

[0028] Embodiment 2, refer to Figures 4-10 As a second embodiment of the present application, the difference between the embodiment and the first embodiment is that the blocking assembly 3 comprises a moving groove 31 formed in one side of the rotating groove 23, a plurality of blocking plates 32 slidably connected in the moving groove 31, a moving rod 33 fixedly connected to one side of the blocking plate 32, an arc-shaped groove 34 formed in the rotating plate 25 and matched with the moving rod 33, the moving rod 33 being slidably connected in the arc-shaped groove 34, a rectangular block 35 fixedly connected to the other side of the blocking plate 32, a rectangular groove 36 formed in one side of the moving groove 31, and the rectangular block 35 being limitingly slidably connected in the rectangular groove 36.

[0029] Specifically, when the rotating plate 25 rotates, the arc-shaped slot 34 on it drives the moving rod 33 to move, and under the radial limiting of the rectangular slot 36 and the rectangular block 35, the plurality of blocking plates 32 move radially into the moving slot 31 and shrink, wherein, when the blocking plate 32 has been separated from the feeding slot 17, it is still driven to shrink under the continuous advancement of the injection head 14, that is, it guarantees that the injection nozzle 15 can abut against the end face of the feeding slot 17, avoids material leakage during injection, and improves the sealing performance of injection. In addition, the extrusion of the extrusion plate 22 can make the blocking plate 32 open in advance, avoid the contact between the injection nozzle 15 and the blocking plate 32, cause the scratch and damage of the injection nozzle 15, and delay the service life of the part.

[0030] Referring to Figure 10 , the plurality of blocking plates 32 are fan-shaped, and when combined, they form a complete circle.

[0031] Specifically, the complete circle makes the blocking without gap, which not only prevents the leakage of the melt after injection from polluting the mold, but also avoids the foreign matter from entering the flow channel 18 to affect the next injection, ensures the cleanliness and sealing reliability of the flow channel 18, and can realize the rapid opening and blocking of the blocking plate 32, thereby improving the blocking efficiency. The rest of the structure is the same as that of example 1.

[0032] Example 3, referring to Figure 8 and Figures 11-12 , this is the third embodiment of the present application, which is different from the second embodiment in that the ejecting module 4 comprises a folding slot 41 provided on one side of the blocking plate 32 close to the flow channel 18, a fixed rod 42 fixedly connected to one side in the folding slot 41, an ejecting plate 43 rotatably connected to the fixed rod 42, and a torsion spring (not shown in the figure) abuttingly arranged between the ejecting plate 43 and the fixed rod 42.

[0033] Specifically, when the blocking plate 32 moves again, the ejecting plate 43 starts to fold and store in the folding slot 41 under the abutting action of the moving slot 31, and when the ejecting plate 43 is no longer abutted by the side of the moving slot 31, the ejecting plate 43 is suddenly rotated under the resetting action of the torsion spring, so that the end of the ejecting plate 43 hits the end of the residual root, thereby realizing the peeling of the residual root.

[0034] Referring to Figure 11 , the folding slot 41 is inclined to provide the folding storage of the ejecting plate 43.

[0035] Specifically, when the blocking plate 32 shrinks in the moving slot 31, one side of the ejecting plate 43 is extruded by the moving slot 31, so that it turns to the folding slot 41. The inclined folding slot 41 facilitates the end of the ejecting plate 43 to rotate into the folding slot 41, avoiding the end of the ejecting plate 43 being stuck at the edge of the moving slot 31, which causes the shrink of the blocking plate 32 to be out of position.

[0036] Referring to Figure 12The end of the ejection plate 43 is inclined, and a curved ejection groove 5 is formed on the side of the ejection plate 43 close to the fixed rod 42, and the side edge of the ejection groove 5 is perpendicular to the side of the ejection plate 43.

[0037] Specifically, when the blocking plate 32 moves to block, under the action of the torsional spring, the side of the ejection plate 43 close to the side of the moving groove 31 is always pressed by the side, and when the ejection groove 5 moves to the side of the moving groove 31, due to the arrangement of the ejection groove 5, the ejection plate 43 suddenly rotates under the restoring force of the torsional spring, so that the end of the ejection plate 43 suddenly and quickly hits the end of the residual root in the flow channel 18. The "sudden release" of the vertical edge makes the elastic potential energy of the torsional spring instantly converted into the rotational kinetic energy of the ejection plate 43, and compared with the smooth transition release mode, the impact acceleration is larger; at the same time, the curved ejection groove 5 can store more torsional spring potential energy during the contact stage (by stable extrusion to store power), and the energy is more concentrated during the release, and the "point impact" of the inclined end on the residual root (the inclined surface reduces the contact area and increases the local pressure) can efficiently break the adhesion between the residual root and the flow channel 18, avoiding the breakage or residual of the residual root. The inclination angle of the end of the ejection plate 43 forms a specific angle with the axis of the residual root, and when it hits, it not only provides an axial thrust, but also has a slight radial component, guiding the residual root to peel off in the direction away from the inner wall of the flow channel 18 (avoiding the residual root from being stuck in the flow channel 18 due to unilateral force); at the same time, the contact point of the inclined end and the residual root is closer to the end of the residual root (far away from the deep part of the flow channel 18), which can reduce the friction or impact on the inner wall of the main flow channel 18, protecting the surface precision of the flow channel 18.

[0038] Referring to Figure 5 The outer edge of the injection nozzle 15 has the same inclination as the feeding groove 17, and the inner diameter of the end of the injection nozzle 15 is smaller than the inner diameter of the side of the flow channel 18 close to the injection nozzle 15.

[0039] Specifically, when the injection nozzle 15 completely enters the feeding groove 17, the end of the injection nozzle 15 can completely enter the flow channel 18, and the inclination of the side of the injection nozzle 15 is consistent, forming a seamless tapered sealing surface, so that the melt of high-pressure injection can only flow along the positive path from the inside of the injection nozzle 15 to the flow channel 18, and cannot penetrate into the gap between the injection nozzle 15 and the feeding groove 17, so that the injection entry point is in the flow channel 18, avoiding the injection solution from flowing out to the inside of the injection nozzle 15, forming a reverse jam. If there is a gap, the melt may flow in the reverse direction and cool and solidify, forming a "ring burr", which causes the injection nozzle 15 to be stuck when it retreats; the seamless fit directly blocks this risk, ensuring smooth movement of the injection nozzle 15, in addition to the ejection of the ejection plate 43, so that the residual root can be smoothly hit and ejected in the flow channel 18 to achieve rapid peeling of the residual root. The rest of the structure is the same as that of Example 2.

[0040] In combination with Embodiments 1-3, the working principle of the present application is as follows: after the driving unit 1 drives the movable mold and the static mold to be locked together, the injection head 14 moves forward to trigger the extrusion and rotation assembly 2 of the blocking module, the pushing plate 21 drives the extrusion plate 22 to extrude the pushing ring 27, under the guidance of the limiting block 28, the pushing ring 27 drives the rotating ring 24 and the rotating plate 25 to rotate through the rotating rod 210, and then drives the fan-shaped blocking plate 32 to shrink and open the flow channel 18 along the radial direction; at the same time, the injection nozzle 15 is conically attached to the feeding groove 17, the end part extends into the flow channel 18 to form a seal, the melt plastic auger 13 melts the raw material into a melt, which is injected into the cavity through the injection head 14, the injection nozzle 15 and the flow channel 18, and then pressure compensation is performed. In the cooling stage, the melt in the cavity and the flow channel 18 is solidified into a product and a residual root respectively; after the injection head 14 retreats, the spring 26 resets to drive the rotating plate 25 to rotate in the opposite direction, the fan-shaped blocking plate 32 is combined to block the flow channel 18, preventing impurities from entering and the melt from overflowing. During the blocking process, the ejection plate 43 of the ejection module 4 moves with the blocking plate 32 and is folded and stored, when the ejection groove 5 is separated from the constraint of the moving groove 31, the torsional spring instantaneously releases potential energy to drive the ejection plate 43 to impact the residual root at the inclined end, and in combination with the tapered surface of the flow channel 18 and the gradually changing design of the inner diameter of the injection nozzle 15, the residual root is quickly stripped. Finally, the driving unit 1 opens the mold, the product and the residual root are taken out, and the mold is reset to enter the next cycle, without the need for additional power throughout the process, and the structural linkage ensures the sealing reliability and the stripping efficiency.

[0041] Embodiment 4, with reference to Figures 1-12 As a fourth embodiment of the present application, there is provided: a method for injection molding of an automobile instrument frame, comprising the following steps: S1, preparation and mold closing: adding raw materials to the feeding barrel of the melt plastic unit 12, preheating the melt plastic auger 13, driving the driving unit 1 to drive the movable mold and the static mold to be locked together, and moving the injection head 14 to make the injection nozzle 15 attach to the feeding groove 17 of the feeding nozzle 16; S2, injection molding: the injection head 14 triggers the extrusion and rotation assembly 2 of the blocking module to drive the blocking assembly 3 to open the flow channel 18; the melt plastic auger 13 melts the raw material into a melt, which is injected into the cavity through the injection head 14, the injection nozzle 15 and the flow channel 18; S3, pressure maintaining and cooling: maintaining pressure to compensate, and then starting the cooling system, and the melt in the cavity and the flow channel 18 is solidified into a product and a residual root respectively; S4, blocking and ejecting residual root: the injection head 14 retreats to separate, the blocking module resets to block the flow channel 18, and the ejection module 4 operates to eject the injection residual root in the flow channel 18; S5, mold opening cycle: the driving unit 1 drives the movable mold to open, the product and the residual root are taken out, the mold is reset, and the next cycle of production is entered; after the injection head 14 is separated, the residual root is hardened and left in the flow channel 18, and the flow channel 18 is a continuous tapered surface type with a taper angle of 3°-8°, the residual root is quickly ejected by the ejection module 4, and the discharging of the product and the residual root is facilitated.

[0042] It should be noted that the above examples are only used to illustrate the technical solutions of the present application but not limit the present application. Although the present application is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalently replaced, without departing from the spirit and scope of the technical solutions of the present application, which should be covered in the scope of the claims of the present application.

Claims

1. An injection mold for an automotive instrument panel frame, comprising a drive unit (1), an injection unit (11) disposed on one side of the drive unit (1), and a melting unit (12) disposed on one side of the injection unit (11), wherein the melting unit (12) comprises a feeding tank, a melting auger (13) disposed at the bottom of the feeding tank, an injection head (14) disposed on one side of the melting auger (13), and an injection nozzle (15) disposed at the end of the injection head (14), wherein the injection unit (11) comprises a moving mold and a stationary mold, the moving mold being disposed on one side of the drive unit (1), and the stationary mold being disposed on one side of the melting unit (12), characterized in that: The injection unit (11) also includes a feed nozzle (16) disposed in the stationary mold, a funnel-shaped feed groove (17) in the middle of the feed nozzle (16), a sealing module and a ejector module (4) disposed on one side of the feed nozzle (16), and a flow channel (18) disposed on the other side of the feed nozzle (16). The sealing module is used to seal the flow channel (18) after the injection head (14) leaves the injection channel after injection is completed. It includes the extrusion rotation assembly (2) and the sealing assembly (3) located on one side of the extrusion rotation assembly (2). The ejector module (4) is used to eject the injection residue remaining in the flow channel (18) after injection is completed, so as to facilitate material removal. The extrusion rotation assembly (2) includes a push plate (21) disposed on one side of the injection head (14), several extrusion plates (22) disposed on one side of the push plate (21) and extending through one side of the feed nozzle (16), a rotation groove (23) opened inside the feed nozzle (16), a rotation ring (24) disposed in the rotation groove (23), a rotation plate (25) disposed on one side of the rotation ring (24), a spring (26) disposed on one side of the rotation plate (25), the spring (26) being sleeved on the rotation ring (24), and a push ring (27) disposed on one side of the spring (26). The push ring (27) and the push plate (21) abut against each other. A number of limiting blocks (28) are arranged in a ring array around the push ring (27). A number of limiting grooves (29) matching the limiting blocks (28) are opened in the rotating groove (23). The limiting blocks (28) slide in the limiting grooves (29). A number of rotating rods (210) are arranged in a ring array on the inner side wall of the push ring (27). A number of rotating grooves (211) matching the rotating rods (210) are opened on the outer wall of the rotating ring (24). The rotating rods (210) are arranged in the rotating grooves (211).

2. The automotive instrument panel frame injection mold according to claim 1, characterized in that: The sealing assembly (3) includes a movable groove (31) opened on one side of the rotating groove (23), a plurality of sealing plates (32) set in the movable groove (31), a movable rod (33) set on one side of the sealing plate (32), an arc-shaped groove (34) opened on the rotating plate (25) and matching the movable rod (33), the movable rod (33) slidingly connected in the arc-shaped groove (34), a rectangular block (35) set on the other side of the sealing plate (32), and a rectangular groove (36) opened on one side of the movable groove (31), the rectangular block (35) being limited and sliding in the rectangular groove (36).

3. The automotive instrument panel frame injection mold according to claim 2, characterized in that: Several of the sealing plates (32) are fan-shaped and, when combined, form a complete circle.

4. The automotive instrument panel bezel injection mold according to claim 3, characterized in that: The top material module (4) includes a folding groove (41) opened on the side of the sealing plate (32) near the flow channel (18), a fixing rod (42) set on one side of the folding groove (41), an ejection plate (43) set on the fixing rod (42), and a torsion spring set between the ejection plate (43) and the fixing rod (42).

5. The automotive instrument panel frame injection mold according to claim 4, characterized in that: The folding slot (41) is opened at an angle to allow the top plate (43) to be folded and stored.

6. The automotive instrument panel frame injection mold according to claim 4, characterized in that: The end of the ejector plate (43) is inclined, and a curved ejector groove (5) is provided on the side of the ejector plate (43) near the fixing rod (42). The edge of the ejector groove (5) is perpendicular to the side of the ejector plate (43).

7. The automotive instrument panel frame injection mold according to claim 1, characterized in that: The outer edge of the injection nozzle (15) is inclined at the same degree as the feed groove (17), and the inner diameter of the end of the injection nozzle (15) is smaller than the inner diameter of the flow channel (18) on the side close to the injection nozzle (15).

8. A method for injection molding an automotive instrument panel frame, applied to the automotive instrument panel frame injection mold as described in any one of claims 1-7, characterized in that, Includes the following steps: Preparation and mold closing: Add raw materials to the feeding bucket of the melting unit (12), preheat the melting auger (13), drive unit (1) drives the moving mold and the stationary mold to close and lock, and the injection head (14) moves forward so that the injection nozzle (15) fits into the feeding groove (17) of the feeding nozzle (16). Injection molding: The injection head (14) triggers the extrusion rotation component (2) of the sealing module, and drives the sealing component (3) to open the flow channel (18); the melt auger (13) plasticizes the raw material into a melt, which is injected into the cavity through the injection head (14), injection nozzle (15) and flow channel (18); Pressure holding and cooling: Maintain pressure and compensate for shrinkage, then start the cooling system, and the melt in the cavity and runner (18) solidifies into the product and the residual root respectively; Blocking and ejecting residual parts: The injection head (14) retracts and disengages, the blocking module resets and blocks the flow channel (18), the ejection module (4) moves and ejects the injection residual parts in the flow channel (18); Mold opening cycle: The drive unit (1) drives the moving mold to open, removes the product and the residual root, resets the mold, and enters the next round of production.

9. The injection molding method for automotive instrument panel bezel according to claim 8, characterized in that: After the injection head (14) separates, the residual root hardens and remains in the flow channel (18). The flow channel (18) is a continuous conical surface with a cone angle of 3°-8°. The residual root is quickly ejected by the ejector module (4), which facilitates the unloading of the product and the residual root.

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