Automobile skylight frame multi-point sequence valve control glue feeding mold structure
By controlling the injection mold structure with multi-point sequential valves, combined with hydraulic drive and timing control, the problems of low positioning accuracy and insufficient locking strength of traditional molds are solved, realizing high-precision injection molding and high-quality products for automotive sunroof frames.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- WUXI FENGYI AUTO PARTS CO LTD
- Filing Date
- 2026-01-12
- Publication Date
- 2026-05-12
AI Technical Summary
Traditional molds suffer from low positioning accuracy and insufficient locking strength during injection molding, leading to mold core displacement or loosening, resulting in cavity offset and product dimensional deviation. This is especially true for large-sized, complex skylight frames, which are prone to defects such as uneven material flow filling, obvious weld lines, and residual air bubbles.
The injection mold structure is controlled by a multi-point sequential valve consisting of a front clamping plate, sliding seat, insert seat, hot runner plug, and side mold cavity seat. The sliding seat is driven by a hydraulic rod to slide along a preset trajectory, and the slot and insert seat are precisely fitted. Combined with a timing controller, the multi-point injection and hot runner system are kept at a constant temperature, ensuring uniform filling of the molten material and a stable connection of the mold core.
It achieves a stable connection of mold components, ensures micron-level positioning accuracy, avoids mold core displacement, improves the dimensional consistency and surface finish of the product, reduces weld lines and bubble defects, and improves injection molding efficiency and molding quality.
Smart Images
Figure CN122008500A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the technical field of automotive injection molds, specifically to a multi-point sequential valve controlled injection mold structure for automotive sunroof frames. Background Technology
[0002] As a core component for improving in-vehicle ventilation and driving experience, the sunroof is widely used in economy cars, commercial vehicles, and high-end models. Its types include various structures such as outward-opening, inward-opening, and panoramic. As the core load-bearing structure of the sunroof assembly, the sunroof frame needs to have high-precision dimensional tolerances, excellent structural strength, and good assembly compatibility, which directly affects the sunroof's sealing performance and service life.
[0003] Traditional molds often use bolts or simple locking pins to position the mold core, which results in low positioning accuracy and insufficient locking strength. During injection molding, the impact pressure of tens of megapascals generated by the molten material flow can easily cause the mold core to shift or loosen, causing cavity displacement and leading to quality problems such as product dimensional deviation and excessive assembly clearance. Most traditional molds use single-point injection or multi-point injection mode without sequential control. For large-sized and complex skylight frames, defects such as uneven material flow filling, obvious weld lines, and residual air bubbles are likely to occur, resulting in poor surface finish and insufficient structural strength of the product. Summary of the Invention
[0004] The purpose of this invention is to provide a multi-point sequential valve controlled injection mold structure for automotive sunroof frames, so as to solve the above-mentioned defects caused by the prior art.
[0005] A multi-point sequential valve controlled injection mold structure for an automotive sunroof frame includes a front mounting plate, a sliding seat, an insert seat, a hot runner plug, and a side mold cavity seat. The front mounting plate is fixedly connected to the hot runner plate by fasteners. The top of the front mold plate is connected to the bottom of the hot runner plate. The guide post slots on the front mold plate correspond to the guide post holes in the hot runner plate. A timing controller is connected to one side of the front mounting plate. A hot runner plug is located on the other side of the timing controller, and a second timing controller is located on the other side of the hot runner plug. The injection mechanism is arranged on the hot runner plate. In the area directly above, the molten material output flows sequentially through the runner of the hot runner plate and the outlet of the hot nozzle, and is injected into the molding cavity formed by the front mold core 2, the front mold core 3, the middle mold cavity seat and the side mold cavity seat, completing the injection molding process of the car sunroof frame. A locking mechanism is provided on one side of the front mold core 1. The locking mechanism is powered by a hydraulic rod to drive the slide seat to slide along a preset trajectory. As the slide seat moves, the groove integrated at its bottom end and the insert seat assembled on one side of the front mold core form a precise fit, thereby firmly locking the front mold core 1 to the corresponding side position of the front mold plate.
[0006] Preferably, the hot nozzle, front mold core two, front mold core three, middle mold cavity seat, and side mold cavity seat constitute an injection molding mechanism. The hot nozzle is fixed to the lower end face of the hot runner plate, and its discharge end extends vertically downward through the plate of the front mold and to the bottom end of the front mold. The front mold core two is embedded and fixed in the molding groove opened at the top of the front mold. The front mold core three is adapted to be installed on one side of the groove wall of the front mold forming groove, and precisely fits the side end face of the front mold core two. The front mold core one is correspondingly assembled on the other side of the groove wall of the front mold forming groove, and forms a seamless connection with the other end face of the front mold core two. The middle mold cavity seat is coaxially arranged directly above the front mold core two, and its bottom end face corresponds to the top molding surface of the front mold core two. There are two sets of side mold cavity seats, and the two sets of side mold cavity seats are respectively covered on the top end faces of the front mold core three and the front mold core one, and are connected to the two ends of the middle mold cavity seat.
[0007] Preferably, the hot runner plate has a flow channel inside, and multiple sets of hot nozzles are arranged at equal intervals on its lower side, which are connected to the pre-set glue inlet on the front mold core.
[0008] Preferably, the front mold core, the slide seat, the slot, the insert seat, and the hydraulic rod constitute a locking structure. An insert seat is provided on one side of the front mold core, and a slide seat is provided at the top of the insert seat. The hydraulic rods are symmetrically arranged on both sides of the front mold plate. The output end of the hydraulic rod is connected to one side of the slide seat, and a slot is provided at the bottom of the slide seat.
[0009] Preferably, the front mold core is fitted with a slot at the bottom of the slide seat by means of an insert fixed on its side.
[0010] Preferably, the output end of the hydraulic rod is connected to the side of the insert seat and forms a snap-fit engagement with the snap-fit structure preset at the bottom of the insert seat.
[0011] Compared with the prior art, the present invention has the following advantages: 1. The front clamping plate, hot runner plate, and front template are fixed in layers by fasteners. The mold core, cavity seat and other components adopt embedded and snap-fit connection, which is convenient for disassembly and maintenance and reduces the cost of mold debugging and repair. The hydraulically driven snap-fit mechanism has stable transmission, the slide seat slides along the preset trajectory, and the snap-fit structure of the slot and insert seat ensures the locking strength and avoids the displacement of the mold core during the mold closing injection process.
[0012] 2. The locking mechanism adopts a precise matching design between the slide seat slot and the front mold core and insert seat. When the hydraulic rod drives the slide seat to slide along the preset trajectory, the slot and the insert seat fit tightly together, achieving micron-level positioning accuracy. This ensures seamless connection between the front mold core and the front mold core and the front template, avoiding product size deviation caused by cavity offset after mold closing. The hydraulic rod provides a continuous and uniform locking force, which, through the mechanical transmission of the slide seat, makes the slot and the insert seat form a rigid fit. This can resist the impact pressure of the molten material flow during injection molding, effectively preventing mold core displacement or loosening, and ensuring the consistency of the cavity contour in mass production. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a top view of the front template structure in this invention; Figure 3 This is a schematic diagram of the three-side view structure of the front mold core in this invention; Figure 4 This is a schematic diagram of the two side views of the front mold core in this invention; Figure 5 This is a top view schematic diagram of the front mold core structure in this invention.
[0014] in: 1. Front mounting plate; 2. Hot runner plate; 3. Front mold plate; 4. Guide post through slot; 5. Sliding seat; 6. Slot; 7. Front mold core one; 8. Insert seat; 9. Hot nozzle; 10. Front mold core two; 11. Front mold core three; 12. Middle mold cavity seat; 13. Timing controller one; 14. Hot runner plug; 15. Timing controller two; 16. Side mold cavity seat; 17. Hydraulic rod. Detailed Implementation
[0015] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.
[0016] like Figures 1 to 5As shown, a multi-point sequential valve controlled injection mold structure for an automotive sunroof frame includes a front mounting plate 1, a sliding seat 5, an insert seat 8, a hot runner plug 14, and a side mold cavity seat 16. The front mounting plate 1 is fixedly connected to the hot runner plate 2 by fasteners. The top of the front mold plate 3 is connected to the bottom of the hot runner plate 2. The guide post slots 4 on the front mold plate 3 must correspond to the guide post holes of the hot runner plate 2. A timing controller 13 is connected to one side of the front mounting plate 1. The hot runner plug 14 is provided on the other side of the timing controller 13. A timing controller 25 is provided on the other side of the hot runner plug 14. The injection mechanism is arranged on the hot runner... The molten material output from the area directly above the runner plate 2 flows sequentially through the flow channel of the hot runner plate 2 and the outlet end of the hot nozzle 9, and is injected into the molding cavity formed by the front mold core 2 10, the front mold core 3 11, the middle mold cavity seat 12, and the side mold cavity seat 16, thus completing the injection molding process of the car sunroof frame. A locking mechanism is provided on one side of the front mold core 1 7. The locking mechanism is powered by the hydraulic rod 17 to drive the slide seat 5 to slide along a preset trajectory. As the slide seat 5 moves, the groove 6 integrated at its bottom end and the insert seat 8 assembled on the side of the front mold core 1 7 form a precise fit, thereby firmly locking the front mold core 1 7 to the corresponding side position of the front mold plate 3.
[0017] Specifically, the timing of the glue injection is preset by timing controller 13 and timing controller 2 15, and the filling logic of "weak areas first, then main areas" is followed to avoid bubbles and weld lines caused by the collision of molten material flow. At the same time, the constant temperature control of the hot runner system and the linkage temperature control equipment of the hot runner plug 14 ensure uniform material flow and reduce molding defects such as shrinkage marks and warping.
[0018] In this embodiment, the hot runner 9, front mold insert 2 10, front mold insert 3 11, middle mold cavity seat 12, and side mold cavity seat 16 constitute an injection molding mechanism. The hot runner 9 is fixed to the lower end face of the hot runner plate 2, and its discharge end extends vertically downward through the plate of the front mold plate 3 and to the bottom end of the front mold plate 3. The front mold insert 2 10 is embedded and fixed in the molding groove at the top of the front mold plate 3. The front mold insert 3 11 is adapted to be installed on one side wall of the molding groove of the front mold plate 3, and precisely fits the side end face of the front mold insert 2 10. The front mold insert 1 7 is correspondingly assembled on the front mold plate 3. The other side of the groove wall of the molding groove is seamlessly connected with the other side end face of the front mold core 2 10; the middle mold cavity seat 12 is coaxially arranged directly above the front mold core 2 10, and its bottom end face corresponds to the top molding surface of the front mold core 2 10; there are two sets of side mold cavity seats 16, and the two sets of side mold cavity seats 16 are respectively covered on the top end faces of the front mold core 3 11 and the front mold core 1 7, and are connected to the two sides of the middle mold cavity seat 12; the hot runner plate 2 is provided with a flow channel inside, and multiple sets of hot nozzles 9 are arranged at equal intervals on its lower side and are connected to the pre-set glue inlet on the front mold core 2 10.
[0019] Among them: multiple hot nozzles 9 are evenly spaced on the lower side of the hot runner plate 2, and the flow channel distributes the melt synchronously. Combined with the sequence valve control, it avoids the problem of uneven filling of single-point glue injection and shortens the cavity filling time; the hot nozzles 9 directly penetrate the front template 3 and connect to the glue inlet, reducing the melt delivery path and improving the injection cycle efficiency.
[0020] In this embodiment, the front mold core 7, the slide seat 5, the slot 6, the insert seat 8, and the hydraulic rod 17 constitute a locking structure. The insert seat 8 is provided on one side of the front mold core 7, and the slide seat 5 is provided on the top of the insert seat 8. The hydraulic rod 17 is symmetrically arranged on both sides of the front mold plate 3. The output end of the hydraulic rod 17 is connected to one side of the slide seat 5. The bottom end of the slide seat 5 is provided with a slot 6. The front mold core 7 is fitted with the slot 6 at the bottom end of the slide seat 5 by means of the insert seat 8 fixed on its side. The output end of the hydraulic rod 17 is connected to the side of the insert seat 8 and forms a locking engagement with the locking structure at the bottom end of the insert seat 8.
[0021] When the hydraulic rod 17 drives the slide seat 5 to slide along the preset trajectory, the slot 6 and the insert seat 8 fit tightly together, which can achieve micron-level positioning accuracy, ensure seamless docking of the front mold core 1 7, the front mold core 2 10, and the front template 3, and avoid product size deviation caused by cavity offset after mold closing.
[0022] In practical applications, this multi-point sequential valve-controlled injection mold structure for automotive sunroof frames includes the following tasks: When the mold starts the mold closing action, the front clamping plate 1 drives the hot runner plate 2 to precisely fit with the front template 3 through the fasteners. The guide post slot 4 on the front template 3 is precisely aligned with the guide post hole of the hot runner plate 2 to ensure the mold closing guidance accuracy. The hydraulic rod 17 serves as the power source, driving the slide seat 5 to slide along the preset trajectory towards the front mold core 7. As the slide seat 5 moves, the preset slot 6 at its bottom end forms a precise fit with the insert seat 8 fixed on the side of the front mold core 7, and firmly locks the front mold core 7 to the corresponding side groove wall of the front template 3. The front mold core 7 is seamlessly connected with the front mold core 2 10 and the front mold core 3 11. The middle mold cavity seat 12 is coaxially covered above the front mold core 2 10. Two sets of side mold cavity seats 16 are respectively covered on the top of the front mold core 3 11 and the front mold core 7 and connected to the middle mold cavity seat 12, together forming a closed molding cavity consistent with the outline of the car sunroof frame. Hot runner plug 14 connects to external temperature control equipment to preheat the internal flow channels and equally spaced hot nozzles 9 of the hot runner plate 2, ensuring that the molten material maintains stable flow during the conveying process; timing controller 13 and timing controller 25 establish signal connection with the hot runner system and preset multi-point glue injection timing according to the structural characteristics of the skylight frame. The injection mechanism starts, injecting molten plastic raw material into the main channel of the hot runner plate 2. The material is then distributed to each hot nozzle 9 through the internal flow channel. The timing controller triggers the sequence valves of each hot nozzle 9 in sequence according to the preset program. After the outlet end of the hot nozzle 9 passes through the front mold plate 3, it is precisely aligned with the corresponding inlet on the front mold core 10. The molten material is injected into the closed cavity in the order of "filling the weak areas of the cavity first and then filling the main body area", so that the molten material fully adheres to the inner wall of the cavity. After the material is completely filled and cooled and solidified, the molding of the car sunroof frame is completed. After injection molding is completed, the mold starts to open, the timing controller sends a signal to cut off the power of the hot runner system, the hot nozzle 9 stops injecting and cools down, the hydraulic rod 17 drives the slide seat 5 to reset along the preset trajectory, the slot 6 at the bottom of the slide seat 5 disengages from the insert seat 8, the locking mechanism unlocks, the front clamping plate 1 drives the hot runner plate 2 and the hot nozzle 9 to separate upwards, the front mold plate 3 separates synchronously from the middle mold cavity seat 12 and the side mold cavity seat 16, and the molded car sunroof frame product is ejected by the demolding mechanism on the front mold core side, completing one injection molding cycle.
[0023] Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not exhaustive. All modifications within the scope of this invention or its equivalents are included in this invention.
Claims
1. A multi-point sequential valve controlled glue injection mold structure for an automotive sunroof frame, characterized in that: The system includes a front mounting plate (1), a sliding seat (5), a front mold core (7), an insert seat (8), a hot runner plug (14), and a side mold cavity seat (16). The front mounting plate (1) is fixedly connected to the hot runner plate (2) by fasteners. The top of the front template (3) is connected to the bottom of the hot runner plate (2). The guide post slot (4) on the front template (3) must correspond to the guide post hole of the hot runner plate (2). One side of the front mounting plate (1) is connected to a timing controller (13). The other side of the timing controller (13) is provided with a hot runner plug (14). The other side of the hot runner plug (14) is provided with a timing controller (2) (15). The injection molding mechanism is arranged on the hot runner plate (2). In the area directly above, the molten material output passes through the flow channel of the hot runner plate (2) and the outlet end of the hot nozzle (9) in sequence, and is injected into the molding cavity formed by the front mold core 2 (10), the front mold core 3 (11), the middle mold cavity seat (12) and the side mold cavity seat (16) to complete the injection molding process of the car sunroof frame. A locking mechanism is provided on one side of the front mold core 1 (7). The locking mechanism is powered by the hydraulic rod (17) to drive the slide seat (5) to slide along the preset trajectory. As the slide seat (5) moves, the slot (6) integrated at its bottom end and the insert seat (8) assembled on the side of the front mold core 1 (7) form a precise fit, thereby firmly locking the front mold core 1 (7) to the corresponding side position of the front template (3).
2. The automotive sunroof frame multi-point sequential valve controlled glue injection mold structure according to claim 1, characterized in that: The hot runner (9), front mold core 2 (10), front mold core 3 (11), middle mold cavity seat (12), and side mold cavity seat (16) constitute the injection molding mechanism. The hot runner (9) is fixed to the lower end face of the hot runner plate (2), and its discharge end extends vertically downward through the plate of the front mold plate (3) and to the bottom side of the front mold plate (3). The front mold core 2 (10) is embedded and fixed in the molding groove opened at the top of the front mold plate (3). The front mold core 3 (11), 11) The front mold core (7) is fitted to one side of the groove of the front template (3) and fits precisely with the side end face of the front mold core (10); the front mold core (7) is fitted to the other side of the groove of the front template (3) and fits seamlessly with the other side end face of the front mold core (10); the middle mold cavity seat (12) is coaxially set directly above the front mold core (10) and its bottom end face corresponds to the top forming surface of the front mold core (10).
3. The automotive sunroof frame multi-point sequential valve controlled glue injection mold structure according to claim 2, characterized in that: The side mold cavity seat (16) is provided in two sets. The two sets of side mold cavity seats (16) are respectively covered on the top end face of the front mold core three (11) and the front mold core one (7), and are connected to the two ends of the middle mold cavity seat (12).
4. The automotive sunroof frame multi-point sequential valve controlled glue injection mold structure according to claim 3, characterized in that: The hot runner plate (2) is provided with a flow channel inside, and multiple hot nozzles (9) are arranged at equal intervals on its lower side and are connected to the pre-set inlet on the front mold core (10).
5. The automotive sunroof frame multi-point sequential valve controlled glue injection mold structure according to claim 4, characterized in that: The front mold core (7), sliding seat (5), slot (6), insert seat (8) and hydraulic rod (17) constitute a locking structure.
6. The automotive sunroof frame multi-point sequential valve controlled glue injection mold structure according to claim 5, characterized in that: An insert seat (8) is provided on one side of the front mold core (7), and a sliding seat (5) is provided at the top of the insert seat (8). The hydraulic rods (17) are symmetrically arranged on both sides of the front mold plate (3).
7. The automotive sunroof frame multi-point sequential valve controlled glue injection mold structure according to claim 6, characterized in that: The output end of the hydraulic rod (17) is connected to one side of the travel seat (5), and the bottom end of the travel seat (5) is provided with a slot (6).
8. The multi-point sequential valve controlled glue injection mold structure for an automotive sunroof frame according to claim 7, characterized in that: The front mold core (7) is fitted together with the slot (6) at the bottom of the slide seat (5) by means of the insert seat (8) fixed on its side.
9. The multi-point sequential valve controlled glue injection mold structure for an automotive sunroof frame according to claim 8, characterized in that: The output end of the hydraulic rod (17) is connected to the side of the insert seat (8) and forms a snap-fit with the snap-fit structure preset at the bottom of the insert seat (8).