Device for low-pressure edge covering forming of large-size skylight glass
By combining soft materials and multi-point continuous casting technology with vacuum-sealed cavity design, the problems of low filling rate and high breakage rate in the forming of large-size sunroof glass edging were solved, achieving high-quality forming effect and improved safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-03
- Publication Date
- 2026-03-10
AI Technical Summary
Existing technologies suffer from low filling rates and high breakage rates during the forming process of large-size sunroof glass edging, leading to decreased product quality and safety hazards.
The upper mold sealing surface is made of soft material and multi-point continuous casting technology is combined with vacuum sealing cavity design. Multi-point continuous casting is achieved by moving the injection gun head along the parting surface, which reduces injection pressure and ensures that the polymer material is fully filled and evenly distributed.
It significantly improved the filling rate, reduced the glass breakage rate, enhanced the bonding strength between functional components and glass, and ensured the safety and forming quality of the skylight glass.
Smart Images
Figure CN223982053U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a mold for low-pressure edge forming of large-size sunroof glass, belonging to the field of automotive sunroof glass edge foam forming technology. Background Technology
[0002] With the continuous development of the automotive industry, consumers' demands for automotive comfort and aesthetics are increasing, and sunroofs, as an important feature, are being used more and more widely. Sunroof glass edging forming technology is a key technology in the automotive manufacturing field. Its main purpose is to firmly bond the iron frame and other components to the glass to ensure the structural strength and sealing performance of the sunroof.
[0003] In the process of forming the edging of automotive sunroof glass, two polymer materials are typically injected at high speed into the mold cavity. These two polymer materials undergo a chemical reaction within the mold cavity, and after curing, they bond the iron frame and other components to the glass. However, existing technologies have some shortcomings when forming the edging of large-sized sunroof glass.
[0004] Current technology primarily increases the injection pressure and speed of the molding machine to enhance the flowability of polymer materials within the mold, ensuring the material fully fills all parts of the mold cavity. However, when polymer materials are injected under high pressure into a highly enclosed mold cavity, the increased injection pressure significantly raises the glass breakage rate, leading to a decline in product quality. Furthermore, for large-size glass, air bubbles or insufficient adhesive may easily appear in certain areas of the product. This further weakens the bond strength between the frame and the glass, increasing the risk of the sunroof glass falling off the roof during vehicle operation, seriously affecting driving safety.
[0005] Therefore, how to solve the problems of low filling rate and high breakage rate that occur during the forming process of large-size sunroof glass edging has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content
[0006] The purpose of this invention is to provide a device for low-pressure edge forming of large-size sunroof glass, so as to solve the problems of low filling rate and high breakage rate that occur during the edge foaming forming process of large-size sunroof glass.
[0007] To achieve the above objectives, the present invention provides a device for low-pressure edge forming of large-size sunroof glass, including an upper mold, a lower mold, and an injection gun head. The upper mold and the lower mold can contact and cooperate to form a cavity. The upper mold is provided with a soft structure as a sealing surface. The injection gun head can open the soft structure to form an injection port, and injection is performed through the injection port.
[0008] Preferably, the injection gun head can move one revolution along the parting surface during the casting process to achieve multi-point continuous casting.
[0009] Preferably, the dispensing gun head can move around the parting line during dispensing.
[0010] Preferably, the upper mold has an aluminum portion, and the soft structure and the aluminum portion form an upper mold cavity; the lower mold has a slider and a lower mold core, and the slider and the lower mold core form a lower mold cavity.
[0011] Preferably, the soft structure is made of silicone.
[0012] Preferably, the upper mold is provided with a casting insert for bonding the functional components to the inside of the glass; the upper mold is provided with a magnet for fixing the metal components and / or a mechanical mechanism for fixing the non-metallic components.
[0013] Preferably, it also includes multiple positioning modules for positioning the upper mold and the lower mold during the casting process.
[0014] Preferably, the positioning module includes a locking head. When the pouring begins, the locking head is in a locked state. When the glue injection gun head approaches the positioning module, the locking head retracts to open the positioning module, providing space for the glue injection gun head to move. After the glue injection gun head leaves, the locking head moves forward again to restore the positioning state.
[0015] Preferably, the cavity is a vacuum-sealed cavity, and the upper mold or the lower mold is connected to a vacuum pump, which can be used to evacuate the cavity to a vacuum state.
[0016] Preferably, the upper mold or the lower mold is provided with a regulating valve for adjusting the vacuum level, and the regulating valve is connected to the internal cavity.
[0017] In summary, this utility model has the following beneficial technical effects:
[0018] 1. The upper mold core of this utility model is made of a soft material (such as silicone), which can adapt to pressure changes within the cavity during the injection process, ensuring that the polymer material can be fully filled into all parts of the cavity, effectively improving the filling rate. Simultaneously, the injection gun head moves one revolution along the parting surface during the pouring process, achieving multi-point continuous pouring, further reducing the flow distance of the material within the cavity, allowing the polymer material to fill the cavity more evenly, thereby significantly improving the filling rate.
[0019] 2. The elastic properties of soft materials can reduce stress concentration during glass forming to some extent, lowering the risk of breakage. Furthermore, multi-point continuous casting avoids excessive flow resistance within the mold cavity, reducing stress on the glass during forming and further lowering the breakage rate. Simultaneously, the functional component gating system firmly bonds functional components (such as ferrous screws or non-metallic parts) to the inside of the glass, improving the bond strength between the components and the glass, dispersing stress during forming, and thus effectively reducing the breakage rate.
[0020] 3. The functional components are bonded to the glass through the functional component casting system. After the polymer material is cured, the bonding strength between the functional components and the glass is significantly improved, ensuring a firm bond between the frame and the glass. This effectively avoids the risk of the sunroof glass falling off the roof of the car during operation, thus improving the safety and reliability of the product.
[0021] 4. The positioning system of this utility model mold can accurately position the upper and lower molds during the casting process, reducing mold shaking and improving forming accuracy. Simultaneously, the vacuum-sealed cavity design ensures more stable and reliable sunroof glass edging forming quality, reduces subsequent forming steps, saves forming materials, and lowers production costs.
[0022] 5. This utility model effectively overcomes the technical difficulties in the edge forming of large-size sunroof glass through innovative mold structure design and process methods, demonstrating outstanding technical advantages and broad application prospects. It can meet the high-quality requirements of the automotive industry for the edge forming of large-size sunroof glass and promote the development of automotive sunroof manufacturing technology. Attached Figure Description
[0023] Figure 1 This is a cross-sectional view of the mold for forming the edge of a large-size sunroof glass in the device for low-pressure edge forming of sunroof glass according to the present invention.
[0024] Figure 2 This is a schematic diagram of the mold structure in the device for low-pressure edge forming of large-size skylight glass according to the present invention;
[0025] Figure 3 This is a schematic diagram of the upper mold in a device for low-pressure edge forming of large-size skylight glass according to the present invention.
[0026] Figure 4 This is a schematic diagram of the lower mold structure in a device for low-pressure edge forming of large-size skylight glass according to the present invention.
[0027] Figure 5 This is a schematic diagram of a casting insert (iron functional component) in a device for low-pressure edge forming of large-size skylight glass according to the present invention;
[0028] Figure 6 This is a schematic diagram of a casting insert (non-ferrous functional component) in a device for low-pressure edge forming of large-size skylight glass according to the present invention.
[0029] Figure 7 This is a schematic diagram of the upper and lower mold positioning system (positioning module distribution) in a device for low-pressure edge forming of large-size sunroof glass according to the present invention;
[0030] Figure 8 This is a schematic diagram of the upper and lower mold positioning system (positioning module locked) in a device for low-pressure edge forming of large-size sunroof glass according to the present invention.
[0031] Figure 9 This is a schematic diagram of the upper and lower mold positioning system in a device for low-pressure edge forming of large-size sunroof glass according to the present invention (positioning module open).
[0032] Reference numerals: 1. PU material; 2. Slider; 3. Lower mold; 4. Silicone; 5. Upper mold; 6. Glass; 7. Casting insert; 8. Lower mold core; 9. Screw; 10. Vent hole; 11. Sprue; 12. Ring magnet; 13. Plastic part; 14. Fixing insert A; 15. Fixing insert B; 16. Insert; 17. Sealing ring; 18. Lock head; 19. Lock hole. Detailed Implementation
[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0034] Example 1:
[0035] This utility model discloses an apparatus for low-pressure edge-wrapping forming of large-size sunroof glass, aiming to solve the problems of low filling rate and high breakage rate that occur during the edge-wrapping foam forming process of large-size sunroof glass. The provided technical solution is a mold specifically for edge-wrapping forming of large-size automotive sunroof glass. The mold consists of an upper mold core and a lower mold core 8, which directly contact and cooperate to form a cavity. A portion of the upper mold core is made of a soft material, such as silicone 4, as a sealing surface.
[0036] In actual operation, when the injection gun tip opens the soft silicone part 4 of the upper mold core, an injection port is formed. The injection gun tip can then pour the polymer material into the mold cavity through this port. Furthermore, while pouring, the injection gun tip moves around the parting surface, achieving multi-point continuous pouring and directly injecting the polymer material into the cavity. This effectively reduces the flow distance of the material within the cavity, achieving low-pressure casting. Simultaneously, through multi-point or multi-sided pouring, other functional components such as plastics or metals can be bonded to the glass 6.
[0037] For the low-pressure edge-wrapping casting system for glass 6, the low-pressure forming mold is divided into an upper mold 5 and a lower mold 3. In actual use, the glass 6 is first placed on the lower mold 3, and then the functional parts to be bonded are placed in the fixing inserts of the upper mold 5. The upper mold 5 is composed of a silicone 4 part and an aluminum part forming the upper mold cavity, while the lower mold 3 is composed of a lower mold core 8 and a slider 2 forming the lower mold cavity. After the injection gun head opens the soft silicone 4 part of the upper mold core to form the injection port, it moves around the parting line during casting to form continuous multi-point casting, thereby completing the edge-wrapping forming of the glass 6.
[0038] Regarding the functional component gating system, in order to bond the functional components to the inside of the glass 6, a gating insert 7 is provided at the corresponding position in the upper mold 5. Taking the bonding of an iron screw 9 as an example, it can be fixed in the insert 16 using a magnet. Then, the glue gun head pours polymer material into the insert cavity. After the polymer material cures, the screw 9 is bonded to the glass 6. If the bonding component is non-metallic, the non-metallic component can be fixed to the insert cavity by a mechanical mechanism, and then the glue gun head pours polymer material into the insert cavity to achieve bonding with the glass 6.
[0039] Regarding the positioning system of the upper and lower molds, multiple positioning modules are installed in the molds to ensure the continuity of the pouring process. At the start of pouring, all positioning modules are locked. During pouring, when the injection gun head approaches one of the positioning modules, the locking head 18 of that module retracts, opening the positioning module and providing sufficient space for the injection gun head to move, allowing for continuous pouring. When the injection gun head leaves, the locking head 18 advances again, entering the locking hole 19, restoring the positioning state of the upper and lower molds. After the outer ring pouring is completed, all positioning modules open, and the formed glass 6 can be removed.
[0040] This invention effectively overcomes the technical challenges in forming large-size sunroof glass with six edges through innovative mold structure design and process methods, significantly improving forming quality and production efficiency, demonstrating outstanding technical advantages and broad application prospects.
[0041] Example 2:
[0042] This embodiment is an improvement upon Embodiment 1. The mold used in this embodiment is also for the foaming and molding of the 6-sided edge of automotive sunroof glass. Its structure includes an upper mold core and a lower mold core 8, which directly contact and fit together to form a cavity, which is a vacuum-sealed cavity. The mold is equipped with a regulating valve for adjusting the vacuum level, which connects to the internal cavity. By utilizing a partial vacuum method in the mold, a sealed area is set in the cavity of the 6-sided edge mold for sunroof glass. A vacuum pump is used to evacuate the cavity to a vacuum state, thereby achieving a vacuum forming process. This vacuum forming process makes the 6-sided edge molding quality of sunroof glass more stable and reliable. Moreover, the mold cavity vacuum method makes the vacuum forming process easier to implement, allowing for the production of complex 6-sided edge moldings of sunroof glass, reducing subsequent molding steps, saving molding materials, and lowering production costs.
[0043] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A device for low pressure hemming forming of large size sunroof glass, characterized in that, The injection gun head can pick up the soft structure to form an injection port, and pouring is conducted through the injection port.
2. A device for forming a low-pressure bound edge of a large-size sunroof glass according to claim 1, characterized in that, The injection gun head can move along the parting surface during pouring to realize multi-point continuous pouring.
3. A device for forming a low-pressure bound edge of a large-size sunroof glass according to claim 2, characterized in that, The injection gun head can move around the parting line during pouring.
4. A device for forming a low-pressure bound edge of a large-size sunroof glass according to claim 3, characterized in that, The upper mold (5) is provided with an aluminum part, and the soft structure and the aluminum part form an upper mold cavity.
5. A device for forming a low-pressure bound edge of a large-size sunroof glass according to claim 4, characterized in that, The soft structure is made of silica gel (4).
6. A device for forming a low-pressure bound edge of a large-size sunroof glass according to any one of claims 1 to 5, characterized in that, The upper mold (5) is provided with a pouring insert (7) for bonding functional components to the inner side of the glass (6).
7. A device for forming a low-pressure bound edge of a large-size sunroof glass according to any one of claims 1 to 5, characterized in that, The upper mold (5) is provided with magnets for fixing metal components and / or mechanical mechanisms for fixing non-metal components.
8. A device for forming a low-pressure bound edge of a large-size sunroof glass according to claim 7, characterized in that, A plurality of positioning modules are further included for positioning the upper mold (5) and the lower mold (3) during pouring.
9. A device for forming a low-pressure bound edge of a large-size sunroof glass according to any one of claims 1 to 5, characterized in that, The positioning module includes a lock head (18) in a locked state at the beginning of pouring.
10. A device for forming a low-pressure bound edge of a large-size sunroof glass according to any one of claims 1 to 5, characterized in that, When the injection gun head approaches the positioning module, the lock head (18) retreats to open the positioning module, providing movement space for the injection gun head. The mold cavity is a vacuum-sealed mold cavity, and the upper mold (5) or the lower mold (3) is connected with a vacuum pump. The upper mold (5) or the lower mold (3) is correspondingly provided with an adjusting valve for adjusting the vacuum degree, and the adjusting valve is communicated with the internal mold cavity.