Support casting system and casting method for daylighting panel mounting frame

Abstract

The invention relates to a support casting system and method for a daylighting panel mounting rack, the support casting system comprises a lower die and an upper die, the lower die is provided with a lower cavity, the upper die is provided with an upper cavity, the support casting system further comprises a mechanical arm, a glass fiber spray gun and a curing agent spray gun, and the mechanical arm is configured to drive the glass fiber spray gun and the curing agent spray gun to walk according to the outline of the lower cavity; the lower mold is provided with a material injection port, the upper mold is provided with a suction port, the suction port is connected with vacuum negative pressure equipment, and the material injection port and the suction port are diagonally arranged; the lower die is provided with a caulking groove surrounding and attached to the edge of the lower cavity, a modeling cutter is arranged in the caulking groove in a lifting sliding mode, and a cutter collecting mechanism used for driving the modeling cutter to be completely embedded into the caulking groove when the upper die and the lower die are closed is arranged between the upper die and the lower die. According to the invention, the ejected glass fiber yarns penetrate into the resin on the bottom wall of the lower cavity and are shaped by the curing agent to form the glass fiber layers which are spatially staggered and disorderly overlapped, so that the structural strength of a finally cast and molded product is ensured, and the production efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of plastic casting, and in particular to a bracket casting system and a casting method for a skylight mounting frame. Background Art

[0002] Skylights are a type of building material used on the top or side of a building to allow natural light to enter the interior; they are primarily designed to provide additional light, while also providing some insulation and heat preservation. Skylights are usually made of transparent or translucent materials to allow light to penetrate, and are generally made of FRP, PC, PVC, PP and other materials. The mounting frame used to install skylights can be made of metal or plastic. Currently, the main mounting frame on the market is made of FRP, which combines the lightness of plastic with the high strength of fiber, and has good corrosion resistance and durability.

[0003] When producing this type of FRP product, glass fibers or carbon fibers are generally arranged in a mold in a certain direction and number of layers, and resin is then injected into the fiber layer. The resin is then fully infiltrated into the fiber through vacuum infusion or hand lay-up to form a strong composite material. The FRP material is then cured under controlled temperature and pressure to ensure that it reaches the predetermined strength and hardness. After curing is complete, the FRP mounting frame is removed from the mold.

[0004] The above-mentioned related technologies have the following defects: due to the certain flexibility of the lighting board, certain shape designs can be performed during the actual installation process, and the corresponding mounting frame will also have some special patterns, hollowing and other shape designs. When producing such mounting frames, the traditional method of laying the glass fiber layer cannot meet the production needs, otherwise it will greatly affect the production efficiency. Summary of the invention

[0005] In order to improve the problem of low efficiency in laying glass fibers when producing mounting frames of special shapes, the present application provides a bracket casting system and a casting method for a skylight mounting frame.

[0006] The first aspect of the present application provides a bracket casting system for a skylight mounting frame using the following technical solution: A bracket casting system for a skylight mounting frame, comprising a lower mold and an upper mold, wherein the lower mold has a lower cavity, and the upper mold has an upper cavity, wherein after the lower mold and the upper mold are molded together, the upper cavity and the lower cavity form a casting cavity for a mounting frame to be produced, and further comprising a mechanical arm and a glass fiber spray gun and a curing agent spray gun mounted on the mechanical arm, wherein the mechanical arm is configured to drive the glass fiber spray gun and the curing agent spray gun to move according to the contour of the lower cavity; The lower mold has an injection port connected to the lower cavity, and the injection port is used to pressurize and infuse a mixture of a resin curing agent; the upper mold has a suction port connected to the upper cavity, and the suction port is connected to a vacuum negative pressure device, and the injection port and the suction port are arranged diagonally; The lower mold is provided with an embedding groove surrounding and fitting the edge of the lower cavity, a shaping knife is provided in the embedding groove for lifting and sliding, and a knife collecting mechanism is provided between the upper mold and the lower mold for driving the shaping knife to be completely embedded in the embedding groove when the upper mold and the lower mold are closed.

[0007] Furthermore, the knife collection mechanism comprises: A plurality of knife receiving seats are provided and surround the outer side of the shaping knife or are centrally arranged on the inner side of the shaping knife. The knife receiving seats are fixedly connected to the shaping knife, and a receiving groove for receiving the knife receiving seats is provided on the lower mold; A return spring is arranged between the knife receiving seat and the bottom wall of the accommodating groove; A plurality of lower pressing blocks are provided and are arranged corresponding to the plurality of the knife receiving seats. When the upper mold and the lower mold are closed, the lower pressing blocks press down the knife receiving seats and embed into the accommodating grooves.

[0008] Furthermore, a plurality of sinks connected to the upper cavity are provided on the lower end surface of the upper mold. When the upper mold and the lower mold are closed, the projection of the sinks on the lower mold covers the corresponding part of the shaping knife.

[0009] Furthermore, an airtight rubber strip is embedded in the lower end surface of the upper mold and is arranged around the upper cavity.

[0010] Furthermore, the suction port is connected to a suction pipe, the suction pipe is connected to a safety tank, an exhaust pipe is connected between the safety tank and the vacuum negative pressure equipment, the suction pipe extends to the bottom of the safety tank, and the exhaust pipe extends to the top of the safety tank.

[0011] Furthermore, the safety tank is filled with a solvent for dissolving the resin to a depth that covers the bottom end of the suction tube.

[0012] Furthermore, a three-way valve is connected between the suction pipe and the suction port, and another joint of the three-way valve is connected to an air pipe. The three-way valve is configured to block the connection between the suction pipe and the suction port when resin continues to be extracted from the suction pipe, and connect the suction pipe to the air pipe.

[0013] A second aspect of the present application provides a method for casting a bracket for a skylight mounting frame using the following technical solution: A method for casting a bracket for a skylight mounting frame, based on the above-mentioned system for casting a bracket for a skylight mounting frame, comprises the following steps: S1. Resin is injected into the lower cavity through the injection port to cover the entire lower cavity, and the depth of the resin in the lower cavity does not exceed 1 / 2 of its depth; S2. The glass fiber spray gun and the curing agent spray gun are controlled by the robot arm to move along the contour of the lower mold cavity, and the glass fiber spray gun and the curing agent spray gun are used to spray glass fiber filaments and a small amount of curing agent into the resin of the lower mold cavity, and the glass fiber filaments sprayed by the glass fiber spray gun are limited by the shaping knife, so that the glass fiber filaments with a spatially staggered and overlapped shape are pre-shaped by the resin and the curing agent; S3. The upper mold and the lower mold are molded together so that the molding knife is embedded in the corresponding embedding groove, the vacuum negative pressure device is turned on, the casting cavity is vacuumed through the suction port, and the predetermined glass fiber filaments are pre-impregnated with a small amount of resin in the lower mold cavity; S4. injecting a mixture of resin and curing agent into the casting cavity under high pressure through the injection port; when the mixture is continuously extracted from the suction port, the injection is stopped and the vacuum negative pressure device is turned off; S5. Heating promotes the curing of the resin, and after the product is completely cured, lift the upper mold and demould the product.

[0014] Furthermore, in step S4, when the mixture is injected into the casting cavity, the mixture is filled into the sink reserved on the upper mold, so that the solidified product has residual material corresponding to the shaping knife at the corresponding position of the sink, and the residual material is lifted by the rise of the shaping knife after the upper mold is lifted to complete the automatic demolding of the product.

[0015] In summary, the beneficial technical effects of this application are: 1. First, resin is injected into the lower cavity of the lower mold through the injection port, and then the mechanical arm is controlled to drive the glass fiber spray gun and the curing agent spray gun into the casting area between the peripheral molding knife and the plurality of embedded molding knives. The curing agent spray gun sprays a small amount of curing agent in a mist form, and the glass fiber spray gun sprays glass fiber filaments and passes through the curing agent mist layer and penetrates into the uncured resin on the bottom wall of the lower cavity as much as possible, and the glass fiber layer is staggered and randomly stacked in space. At this time, the curing agent is combined with the resin to perform a certain degree of curing, and the glass fiber filaments with a spatially staggered and randomly stacked posture can be shaped to ensure the spatial distribution range of the glass fiber layer in the final product, thereby ensuring the structural strength of the final cast product, and effectively avoiding the delamination and debonding of the molded product caused by the traditional process of laying glass fiber cloth; 2. The modeling knife can effectively limit the casting area, avoiding the glass fiber sprayed by the glass fiber spray gun from splashing outside the casting area and affecting the mold closing of the upper and lower molds, and causing more burrs on the cast products and affecting the production quality. In addition, spraying the glass fiber layer with a glass fiber spray gun greatly improves the laying efficiency of the glass fiber layer, which is especially suitable for the production of brackets with patterns, hollowing and other design; 3. The casting cavity is evacuated by a vacuum negative pressure device. Since the suction port is arranged on the upper mold, during the process of evacuating the casting cavity, a part of the resin in the lower cavity is also promoted to infiltrate the glass fiber layer with spatial staggered and disordered overlapping posture after the molding, which can reduce the interface effect between the glass fiber and the resin to a certain extent, and can greatly promote the complete filling speed of the subsequent resin curing agent mixture in the casting cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 This is a schematic diagram of the structure of the upper mold after turning up in the embodiment of the present application; Figure 3 It is a cross-sectional structural schematic diagram mainly used to show the knife retracting mechanism in the embodiment of the present application; Figure 4 It is a schematic cross-sectional structural diagram of the safety can according to an embodiment of the present application.

[0017] Description of reference numerals: 1. Lower mold; 11. Lower cavity; 12. Injection port; 13. Embedding groove; 14. Receiving groove; 15. Airtight groove; 2. Upper mold; 21. Upper cavity; 23. Suction port; 24. Sink; 25. Airtight rubber strip; 41. Vacuum negative pressure equipment; 42. Suction pipe; 43. Safety tank; 44. Air extraction pipe; 45. Three-way valve; 46. Air pipe; 51. Modeling knife; 52. Knife holder; 53. Return spring; 54. Pressing block. DETAILED DESCRIPTION

[0018] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0019] The present application embodiment discloses a bracket casting system for a lighting panel mounting frame. Figure 1 and Figure 2, which includes a lower mold 1 and an upper mold 2, both of which are equipped with heating equipment to promote the curing process of the resin, and the upper mold 2 is lifted and lowered on the lower mold 1, and the lower mold 1 has a lower cavity 11, and the upper mold 2 has an upper cavity 21. After the lower mold 1 and the upper mold 2 are combined, the upper cavity 21 and the lower cavity 11 form a casting cavity for the mounting frame to be produced.

[0020] The casting system also includes a robotic arm and a glass fiber spray gun and a curing agent spray gun (not shown in the figure) installed on the robotic arm. The robotic arm is configured to drive the glass fiber spray gun and the curing agent spray gun to move according to the contour of the cavity 11. In the specific configuration, the robotic arm can be a common three-axis robot. The length of the glass fiber filaments sprayed by the glass fiber spray gun is 10mm to 50mm. The ratio of the amount of curing agent sprayed by the curing agent spray gun to the amount of glass fiber filaments sprayed by the glass fiber spray gun is less than the curing agent and glass fiber ratio set in the casting, and the spraying direction of the curing agent spray gun is below the spraying direction of the glass fiber spray gun.

[0021] The lower mold 1 has an injection port 12 connected to the lower cavity 11, and the injection port 12 is used for pressurized infusion of a mixture of a resin curing agent; the upper mold 2 has a suction port 23 connected to the upper cavity 21, and the suction port 23 is connected to a vacuum negative pressure device 41, and the injection port 12 and the suction port 23 are diagonally arranged.

[0022] The lower mold 1 is provided with an embedding groove 13 which surrounds and fits the edge of the lower mold cavity 11, and a shaping knife 51 is provided in the embedding groove 13 for lifting and sliding. A knife collection mechanism is provided between the upper mold 2 and the lower mold 1 for driving the shaping knife 51 to be completely embedded in the embedding groove 13 when the upper mold 2 and the lower mold 1 are molded together; specifically, for the main part of the bracket, an outer shaping knife 51 wrapping the outer periphery of the casting cavity is provided, and for the hollow part on the bracket, an embedded shaping knife 51 embedded in the casting cavity is provided, and the area between the outer shaping knife 51 and a plurality of embedded shaping knives 51 is the casting area.

[0023] In this way, when casting the bracket of the skylight mounting frame, first, inject resin into the lower cavity 11 of the lower mold 1 through the injection port 12. When the resin completely covers the bottom wall of the lower cavity 11 and its thickness does not exceed 1 / 2 of the depth of the lower cavity 11, control the robot arm to drive the glass fiber spray gun and the curing agent spray gun into the casting area between the outer molding knife 51 and several embedded molding knives 51, and move along the set route. At the same time, a small amount of curing agent in mist is sprayed out by the curing agent spray gun, and glass fiber filaments are sprayed out by the glass fiber spray gun. The 10mm to 50mm long glass fiber filaments, under the spraying power of the glass fiber spray gun, pass through the curing agent mist layer and penetrate into the uncured resin on the bottom wall of the lower cavity 11 as much as possible, and the glass fiber layer is staggered and randomly overlapped in space. At this time, the curing agent combines with the resin to be cured to a certain extent, and the glass fiber filaments with spatially staggered and randomly overlapped postures can be shaped to ensure the spatial distribution range of the glass fiber layer in the final product, thereby ensuring the structural strength of the final cast product, and can effectively avoid the stratification and debonding of the molded products caused by the traditional process of laying glass fiber cloth.

[0024] The provided shaping knife 51 can effectively limit the casting area, and avoid the glass fiber filaments sprayed by the glass fiber spray gun from splashing outside the casting area, which affects the mold closing of the upper mold 2 and the lower mold 1, and causes the defects of more burrs of the cast product and affects the production quality. In addition, spraying the glass fiber layer by the glass fiber spray gun greatly improves the laying efficiency of the glass fiber layer, which is particularly suitable for the production of brackets with patterns, hollowing and other design.

[0025] After the glass fiber layer is laid, the upper mold 2 and the lower mold 1 are closed. Under the action of the knife collection mechanism, the shaping knife 51 is embedded in the groove 13 of the lower mold 1, and the upper cavity 21 and the lower cavity 11 form a complete closed casting cavity; then the casting cavity is evacuated by the vacuum negative pressure device 41. Since the suction port 23 is set on the upper mold 2, during the process of evacuating the casting cavity, it will also promote a part of the resin in the lower cavity 11 to infiltrate the glass fiber layer with spatial staggered and disordered overlapping posture after sizing, which can reduce the interface effect between the glass fiber filaments and the resin to a certain extent, and can greatly promote the complete filling speed of the subsequent resin curing agent mixture in the casting cavity. After the vacuum is completed, the resin curing agent mixture is pressurized and poured into the casting cavity through the injection port 12, and the upper mold 2 and the lower mold 1 are heated to promote curing. After the product in the casting cavity is completely cured, the upper mold 2 is lifted to take out the product, and the production can be completed.

[0026] Specifically, refer to Figure 1 , Figure 2 and Figure 3 The above-mentioned knife collection mechanism comprises: The knife receiving seats 52 are provided in plurality and surround the outer side of the shaping knife 51 or are centrally arranged on the inner side of the shaping knife 51. For example, the outer side of the peripheral shaping knife 51 is connected with a plurality of knife receiving seats 52, and the inner side of the embedded shaping knife 51 is connected with one or more knife receiving seats 52, so as to ensure the smooth downward movement and recovery of the shaping knife 51 to avoid jamming. The knife receiving seats 52 are fixedly connected to the shaping knife 51, and a receiving groove 14 for receiving the knife receiving seats 52 is provided on the lower mold 1. A return spring 53 is disposed between the knife receiving seat 52 and the bottom wall of the receiving groove 14; There are multiple pressing blocks 54 and they are arranged corresponding to the multiple knife receiving seats 52 . When the upper mold 2 and the lower mold 1 are closed, the pressing blocks 54 press down the knife receiving seats 52 and embed into the accommodating groove 14 .

[0027] In addition, a plurality of sinks 24 connected to the upper cavity 21 are provided on the lower end surface of the upper mold 2. When the upper mold 2 and the lower mold 1 are closed, the projection of the sinks 24 on the lower mold 1 covers the corresponding part of the molding knife 51. An airtight rubber strip 25 arranged around the upper cavity 21 is embedded in the lower end surface of the upper mold 2. An airtight groove 15 corresponding to the airtight rubber strip 25 is provided on the upper end surface of the lower mold 1. The depth of the airtight groove 15 is slightly less than the thickness of the airtight rubber strip 25, and the groove width is slightly greater than the width of the airtight rubber strip 25.

[0028] In this way, when the upper mold 2 and the lower mold 1 are closed, the multiple lower pressure blocks 54 on the upper mold 2 push the multiple knife receiving seats 52 connected to the shaping knife 51, so that it is stably received in the corresponding accommodating groove 14, and then under the extrusion of the upper mold 2 and the lower mold 1, the airtight rubber strip 25 is embedded in the airtight groove 15 and is squeezed to produce lateral deformation, which can seal the gap between the two, thereby improving the airtight effect of the casting cavity.

[0029] Moreover, since a plurality of sinkers 24 are provided on the lower end face of the upper mold 2, after the mixture of the resin curing agent is poured into the casting cavity, the mixture flows into the sinkers 24 and solidifies to form the residual material of the final product. Once the upper mold 2 is lifted, the knife receiving seat 52 drives the shaping knife 51 to lift up under the elastic deformation force of the reset spring 53, which can have the effect of pushing the plurality of residual materials upward, thereby allowing the product to be autonomously ejected from the lower cavity 11, thereby achieving the automatic demolding effect of the product.

[0030] In addition, in another possible embodiment, referring to Figure 1 and Figure 4 A suction pipe 42 is also connected to the suction port 23, and the suction pipe 42 is connected to a safety tank 43. The safety tank 43 is filled with a solvent, such as acetone, which is used to dissolve the resin and has a depth that exceeds the bottom of the suction pipe 42; an exhaust pipe 44 is connected between the safety tank 43 and the vacuum negative pressure equipment 41, and the suction pipe 42 extends to the bottom of the safety tank 43, and the exhaust pipe 44 extends to the top of the safety tank 43.

[0031] A three-way valve 45 is connected between the suction tube 42 and the suction port 23, and another joint of the three-way valve 45 is connected to an air tube 46. The three-way valve 45 is configured to block the connection between the suction tube 42 and the suction port 23 when resin continues to be extracted from the suction tube 42, and connect the suction tube 42 with the air tube 46.

[0032] In this way, by setting the safety tank 43, it is possible to avoid the resin in the casting cavity being extracted when the casting cavity is evacuated and damage to the vacuum negative pressure device 41; and while the mixture of the resin curing agent is pressurized and poured through the injection port 12, the suction port 23 can still maintain the suction effect on the casting cavity, which can further promote the filling speed of the mixture in the casting cavity and improve production efficiency. Once the resin is continuously extracted from the suction pipe 42, it means that the casting cavity is completely filled with the mixture of the resin curing agent. At this time, the three-way valve 45 closes the connection between the suction pipe 42 and the suction port 23, and connects the suction pipe 42 to the air pipe 46. As the vacuum negative pressure device 41 continues to work, the clean air in the air pipe 46 can be sucked into the safety tank 43 along the suction pipe 42, and then the residual mixture in the suction pipe 42 can be sucked into the safety tank 43, so as to avoid the residual mixture solidifying and blocking the suction pipe 42; and the mixture entering the safety tank 43 is dissolved by the solvent, further reducing the probability of the mixture solidifying.

[0033] If necessary, air can be added to the suction pipe 44 to pressurize the solvent in the safety tank 43 into the suction pipe 42 for backwashing.

[0034] The embodiment of the present application discloses a method for casting a bracket for a skylight mounting frame. Based on the above-mentioned system for casting a bracket for a skylight mounting frame, referring to Figure 1 , Figure 2 and Figure 3 , which comprises the following steps: S1. Resin is injected into the lower cavity 11 through the injection port 12 to cover the entire lower cavity 11. The depth of the resin in the lower cavity 11 does not exceed 1 / 2 of its depth.

[0035] S2. The glass fiber spray gun and the curing agent spray gun are controlled by a robotic arm to move along the contour of the lower cavity 11, and the glass fiber spray gun and the curing agent spray gun are used to spray glass fiber filaments and a small amount of curing agent into the resin of the lower cavity 11. The glass fiber filaments sprayed out by the glass fiber spray gun are limited by means of a shaping knife 51, so that the glass fiber filaments with a spatially staggered and overlapped shape are pre-shaped by the resin and the curing agent; wherein, a curing accelerator is added to the curing agent sprayed out by the curing agent spray gun, which can accelerate the curing speed of the resin in the lower cavity 11, so that the glass fiber filaments sprayed into the resin in the lower cavity 11 can be shaped faster, thereby ensuring the three-dimensional structure of the glass fiber layer.

[0036] S3. The upper mold 2 and the lower mold 1 are closed so that the molding knife 51 is embedded in the corresponding embedding groove 13, and the vacuum negative pressure device 41 is turned on to evacuate the casting cavity through the suction port 23. At the same time, the predetermined glass fiber filaments are pre-impregnated with a small amount of resin in the lower cavity 11 to minimize the interface effect between the glass fiber filaments and the mixture of the resin curing agent injected later, so as to promote the rapid filling of the mixture in the casting cavity.

[0037] S4. Inject the mixture of resin and curing agent into the casting cavity through the injection port 12 under high pressure; when the mixture is continuously extracted from the suction port 23, stop the injection and turn off the vacuum negative pressure device 41.

[0038] S5. Heat to promote the curing of the resin. After the product is completely cured, lift the upper mold 2 and demould the product.

[0039] Among them, in step S4, when the mixture is injected into the casting cavity, the mixture is filled into the sink 24 reserved on the upper mold 2, so that the solidified product has residual material corresponding to the shaping knife 51 at the corresponding position of the sink 24. The residual material is lifted by the rise of the shaping knife 51 after the upper mold 2 is lifted to complete the automatic demolding of the product.

[0040] The implementation principle of a bracket casting system for a skylight mounting frame in the embodiment of the present application is as follows: By first injecting resin into the lower cavity 11 of the lower mold 1 through the injection port 12, and then controlling the robotic arm to drive the glass fiber spray gun and the curing agent spray gun into the casting area between the outer molding knife 51 and the plurality of embedded molding knives 51, the curing agent spray gun sprays a small amount of curing agent in a mist form, and the glass fiber spray gun sprays glass fiber filaments and passes through the curing agent mist layer and penetrates into the uncured resin on the bottom wall of the lower cavity 11 as much as possible, and the glass fiber layer is staggered and randomly overlapped in space. At this time, the curing agent is combined with the resin to be cured to a certain extent, and the glass fiber filaments with a spatially staggered and randomly overlapped posture can be shaped to ensure the spatial distribution range of the glass fiber layer in the final product, thereby ensuring the structural strength of the final cast product, and can effectively avoid the stratification and debonding of the molded product caused by the traditional process of laying glass fiber cloth.

[0041] The provided shaping knife 51 can effectively limit the casting area, and avoid the glass fiber filaments sprayed by the glass fiber spray gun from splashing outside the casting area, which affects the mold closing of the upper mold 2 and the lower mold 1, and causes more burrs on the cast product, which affects the production quality. In addition, spraying the glass fiber layer by the glass fiber spray gun greatly improves the laying efficiency of the glass fiber layer, which is particularly suitable for the production of brackets with patterns, hollowing and other design.

[0042] The casting cavity is evacuated by the vacuum negative pressure device 41. Since the suction port 23 is arranged on the upper mold 2, during the process of evacuating the casting cavity, a part of the resin in the lower cavity 11 is also promoted to infiltrate the glass fiber layer with spatially staggered and disordered overlapping posture after the molding, which can reduce the interface effect between the glass fiber filaments and the resin to a certain extent, and can greatly promote the complete filling speed of the subsequent resin curing agent mixture in the casting cavity.

[0043] Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The words "first", "second", "third" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and similar words do not indicate a quantitative limit, but indicate that there is at least one. "Include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0044] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A bracket casting system for a lighting panel mounting frame, comprising a lower mold (1) and an upper mold (2), wherein the lower mold (1) has a lower mold cavity (11), and the upper mold (2) has an upper mold cavity (21), and after the lower mold (1) and the upper mold (2) are molded together, the upper mold cavity (21) and the lower mold cavity (11) form a casting cavity for the mounting frame to be produced, characterized in that: It also includes a mechanical arm and a glass fiber spray gun and a curing agent spray gun mounted on the mechanical arm, wherein the mechanical arm is configured to drive the glass fiber spray gun and the curing agent spray gun to move according to the contour of the lower mold cavity (11); The lower mold (1) has an injection port (12) in communication with the lower mold cavity (11), and the injection port (12) is used for pressurized infusion of a mixture of a resin curing agent; the upper mold (2) has a suction port (23) in communication with the upper mold cavity (21), and the suction port (23) is connected to a vacuum negative pressure device (41), and the injection port (12) and the suction port (23) are arranged diagonally; The lower mold (1) is provided with an embedding groove (13) surrounding and fitting the edge of the lower cavity (11), a shaping knife (51) is provided in the embedding groove (13) for lifting and sliding, and a knife collection mechanism is provided between the upper mold (2) and the lower mold (1) for driving the shaping knife (51) to be completely embedded in the embedding groove (13) when the upper mold (2) and the lower mold (1) are closed.

2. A bracket casting system for a lighting panel mounting frame according to claim 1, characterized in that: The knife collection mechanism comprises: A plurality of knife receiving seats (52) are provided and surround the outer side of the shaping knife (51) or are centrally arranged on the inner side of the shaping knife (51); the knife receiving seats (52) are fixedly connected to the shaping knife (51), and a receiving groove (14) for receiving the knife receiving seats (52) is provided on the lower mold (1); A return spring (53) is arranged between the knife receiving seat (52) and the bottom wall of the accommodating groove (14); A plurality of lower pressing blocks (54) are provided and are arranged corresponding to the plurality of knife receiving seats (52). When the upper mold (2) and the lower mold (1) are closed, the lower pressing blocks (54) press down the knife receiving seats (52) and are embedded in the accommodating groove (14).

3. A bracket casting system for a lighting panel mounting frame according to claim 2, characterized in that: A plurality of sinkers (24) connected to the upper cavity (21) are provided on the lower end surface of the upper die (2); when the upper die (2) and the lower die (1) are joined, the projection of the sinkers (24) on the lower die (1) covers the corresponding part of the shaping knife (51).

4. A bracket casting system for a lighting panel mounting frame according to claim 1, characterized in that: An airtight rubber strip (25) arranged around the upper cavity (21) is embedded in the lower end surface of the upper mold (2).

5. A bracket casting system for a lighting panel mounting frame according to any one of claims 1 to 4, characterized in that: The suction port (23) is connected to a suction pipe (42), the suction pipe (42) is connected to a safety tank (43), an exhaust pipe (44) is connected between the safety tank (43) and the vacuum negative pressure device (41), the suction pipe (42) extends to the bottom of the safety tank (43), and the exhaust pipe (44) extends to the top of the safety tank (43).

6. A bracket casting system for a lighting panel mounting frame according to claim 5, characterized in that: The safety tank (43) is filled with a solvent for dissolving the resin to a depth that covers the bottom end of the suction tube (42).

7. A bracket casting system for a lighting panel mounting frame according to claim 5, characterized in that: A three-way valve (45) is connected between the suction tube (42) and the suction port (23); another joint of the three-way valve (45) is connected to an air tube (46); the three-way valve (45) is configured to block the connection between the suction tube (42) and the suction port (23) when resin continues to be extracted from the suction tube (42), and connect the suction tube (42) to the air tube (46).

8. A method for casting a bracket for a skylight panel mounting frame, based on a bracket casting system for a skylight panel mounting frame as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: S1. Injecting resin into the lower cavity (11) through the injection port (12) to cover the entire lower cavity (11), wherein the depth of the resin in the lower cavity (11) does not exceed 1 / 2 of its depth; S2. The glass fiber spray gun and the curing agent spray gun are controlled by the robot arm to move along the contour of the lower mold cavity (11), and the glass fiber spray gun and the curing agent spray gun are used to spray glass fiber filaments and a small amount of curing agent into the resin of the lower mold cavity (11). The glass fiber filaments sprayed from the glass fiber spray gun are limited by the shaping knife (51), so that the glass fiber filaments with a spatially staggered and overlapped shape are pre-shaped by the resin and the curing agent; S3. The upper mold (2) and the lower mold (1) are molded together so that the molding knife (51) is embedded in the corresponding embedding groove (13), the vacuum negative pressure device (41) is turned on, and the casting cavity is evacuated through the suction port (23), and the predetermined glass fiber filaments are pre-impregnated with a small amount of resin in the lower mold cavity (11); S4. injecting a mixture of resin and curing agent into the casting cavity under high pressure through the injection port (12); stopping the injection and closing the vacuum negative pressure device (41) when the mixture is continuously extracted from the suction port (23); S5. Heating is performed to promote the curing of the resin. After the product is completely cured, the upper mold (2) is lifted and the product is demoulded.

9. A method for casting a bracket for a lighting panel mounting frame according to claim 8, characterized in that: In step S4, when the mixed material is injected into the casting cavity, the mixed material is filled into the reserved sink (24) on the upper mold (2), so that the solidified product has residual material corresponding to the shaping knife (51) at the corresponding position of the sink (24), and the residual material is lifted by the rising of the shaping knife (51) after the upper mold (2) is lifted to complete the automatic demoulding of the product.

Images