A light collecting plate mounting frame support casting system and a casting method

Abstract

The application relates to a support casting system and a casting method for a light collecting plate mounting frame, which 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, and the system further comprises a mechanical arm, a glass fiber spray gun and a curing agent spray gun, the mechanical arm is configured to drive the glass fiber spray gun and the curing agent spray gun to move along the contour of the lower cavity; the lower die is provided with a pouring port, the upper die is provided with a suction port, the suction port is connected with a vacuum negative pressure device, and the pouring port and the suction port are arranged at opposite angles; the lower die is provided with an embedded groove which surrounds the lower cavity and is arranged along the edge, a modeling knife is slidably arranged in the embedded groove, and a knife collecting mechanism is arranged between the upper die and the lower die and used for driving the modeling knife to be completely embedded in the embedded groove when the upper die and the lower die are closed. The glass fiber filaments sprayed out are stuck into the resin of the bottom wall of the lower cavity, and are shaped by the curing agent, so that the glass fiber layers are staggered, disordered and superposed in space, the structural strength of the finally cast product is ensured, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plastic part casting, in particular to a bracket casting system and casting method for a daylighting panel mounting rack. BACKGROUND

[0002] A daylighting panel is a building material used on the top or side of a building to allow natural light to enter the interior; it is mainly designed to provide additional lighting, but also has a certain heat insulation and heat preservation effect. The daylighting panel is usually made of transparent or translucent material so that light can penetrate, and is generally made of FRP, PC, PVC, PP and other materials. The mounting rack for installing the daylighting panel can be made of metal or plastic. At present, the mounting rack made of FRP is mainly used on the market, which combines the light weight of plastic and the high strength of fiber, and has good corrosion resistance and durability.

[0003] The product made of FRP material is generally arranged in the mold in a certain direction and layer during production. Resin is injected into the fiber layer, and resin is fully penetrated into the fiber by vacuum infusion or hand lay-up method to form a solid composite material. Then the FRP material is cured under controlled temperature and pressure to ensure that it reaches the predetermined strength and hardness. After curing, the FRP mounting rack is removed from the mold.

[0004] The related technology in the above has the following defects: the daylighting panel has a certain flexibility, and can be designed in a certain shape during actual installation. The corresponding mounting rack also has some special pattern, hollow and other shape designs. The traditional method of laying glass fiber layer cannot meet the production needs when producing such mounting racks, otherwise it will greatly affect the production efficiency. SUMMARY

[0005] In order to improve the problem of low efficiency of glass fiber laying when producing mounting racks with special shapes, the present application provides a bracket casting system and casting method for a daylighting panel mounting rack.

[0006] The first aspect of the present application provides a bracket casting system for a daylighting panel mounting rack, which adopts the following technical scheme:

[0007] A bracket casting system for a daylighting panel mounting rack, comprising a lower mold and an upper mold, the lower mold having a lower cavity, the upper mold having an upper cavity, the upper cavity and the lower cavity forming a casting cavity of the mounting rack to be produced after the lower mold and the upper mold are closed, further comprising a mechanical arm and a glass fiber spray gun and a curing agent spray gun mounted on the mechanical arm, the mechanical arm being configured to drive the glass fiber spray gun and the curing agent spray gun to move along the profile of the lower cavity;

[0008] The lower mold has a material injection opening communicating with the lower cavity, which is used to inject a mixed material of a resin curing agent under pressure; the upper mold has a suction opening communicating with the upper cavity, which is connected to a vacuum negative pressure device, and the material injection opening and the suction opening are diagonally arranged;

[0009] The lower mold is provided with a groove around the lower cavity, and a molding knife is arranged in the groove and slides up and down; a knife collecting mechanism is arranged between the upper mold and the lower mold to drive the molding knife to be completely inserted into the groove when the upper mold and the lower mold are closed.

[0010] Further, the knife collecting mechanism comprises:

[0011] A plurality of knife collecting seats are arranged around the outside of the molding knife or in the middle of the inside of the molding knife, the knife collecting seats are fixedly connected to the molding knife, and the lower mold is provided with a receiving groove for accommodating the knife collecting seats;

[0012] A reset spring is arranged between the knife collecting seat and the bottom wall of the receiving groove;

[0013] A plurality of pressing blocks are arranged corresponding to the plurality of knife collecting seats, and the pressing blocks press the knife collecting seats and insert into the receiving groove when the upper mold and the lower mold are closed.

[0014] Further, a plurality of sink bases are arranged on the lower end surface of the upper mold and communicate with the upper cavity, and the projections of the sink bases on the lower mold cover the corresponding parts of the molding knife after the upper mold and the lower mold are closed.

[0015] Further, the upper mold is embedded with an air-tight rubber strip around the upper cavity.

[0016] Further, the suction pipe is connected to a safety tank, an air suction pipe is connected between the safety tank and the vacuum negative pressure device, the suction pipe extends to the bottom of the safety tank, and the air suction pipe extends to the top of the safety tank.

[0017] Further, the safety tank is filled with a solvent for dissolving resin, and the solvent is filled to a depth higher than the bottom end of the suction pipe.

[0018] Further, a three-way valve is arranged in communication between the suction pipe and the suction opening, an air pipe is connected to the other joint of the three-way valve, and the three-way valve is configured to block the communication between the suction pipe and the suction opening when resin is continuously sucked out of the suction pipe, and to connect the suction pipe and the air pipe.

[0019] The second aspect of the present application provides a support casting method for a light panel mounting rack, which adopts the following technical scheme:

[0020] A bracket casting method for a light panel mounting frame, based on the bracket casting system for a light panel mounting frame described above, comprising the following steps:

[0021] S1. Inject resin into the lower mold cavity through the resin injection port to fill the entire lower mold cavity, and the resin depth in the lower mold cavity does not exceed 1 / 2 of its depth;

[0022] S2. The mechanical arm controls the glass fiber spray gun and the curing agent spray gun to move along the profile of the lower mold cavity, and the glass fiber spray gun and the curing agent spray gun spray glass fiber filaments and a small amount of curing agent into the resin in the lower mold cavity. The glass fiber filaments sprayed by the glass fiber spray gun are limited by the molding knife, so that the glass fiber filaments with spatial staggered superposition are pre-shaped by the resin and the curing agent;

[0023] S3. The upper mold and the lower mold are closed to embed the molding knife in the corresponding embedding groove, the vacuum negative pressure device is turned on, the casting cavity is vacuumed through the suction port, and the pre-shaped glass fiber filaments are pre-impregnated by a small amount of resin in the lower mold cavity;

[0024] S4. High-pressure injection of resin and curing agent mixture into the casting cavity through the resin injection port; stop injection and turn off the vacuum negative pressure device when the mixture is continuously sucked out of the suction port;

[0025] S5. Heat to promote resin curing, and lift the upper mold and demold the product after the product is completely cured.

[0026] Further, in step S4, when injecting the mixture into the casting cavity, the mixture is filled into the reserved sink on the upper mold, so that the cured product has excess material corresponding to the molding knife at the corresponding position of the sink, and the excess material is lifted by the rising of the molding knife after the upper mold is lifted to complete the automatic demolding of the product.

[0027] In summary, the beneficial technical effects of the present application are:

[0028] 1. By first injecting resin into the lower cavity of the lower mold through the injection port, then controlling the mechanical arm to drive the glass fiber spray gun and the curing agent spray gun into the casting area between the peripheral modeling knife and several embedded modeling knives, the curing agent spray gun sprays a small amount of misty curing agent, the glass fiber spray gun sprays glass fiber filaments and penetrates the curing agent mist layer and as far as possible into the unhardened resin of the bottom wall of the lower cavity, and the glass fiber filaments are in a spatially staggered, disordered and superimposed layer, at this time the curing agent combines with the resin to a certain extent. Curing can shape the glass fiber filaments with a spatially staggered, disordered and superimposed attitude, to ensure the spatial distribution range of the glass fiber layer in the final product, thereby ensuring the structural strength of the finally cast molded product, and effectively avoiding the delamination and debonding phenomenon of the molded product caused by the traditional glass fiber cloth laying process;

[0029] 2. The modeling knife can effectively limit the casting area, avoiding the glass fiber filaments sprayed by the glass fiber spray gun from splashing out of the casting area, affecting the closing of the upper and lower molds, and causing more casting product burrs and affecting production quality. And, the glass fiber layer is sprayed by the glass fiber spray gun, greatly improving the laying efficiency of the glass fiber layer, especially suitable for the production of supports with pattern, hollow and other modeling designs;

[0030] 3. The casting cavity is vacuumized by the vacuum negative pressure device. Since the suction port is arranged on the upper mold, during the vacuumization of the casting cavity, a part of the resin in the lower cavity will also promote the infiltration of the glass fiber layer with a spatially staggered, disordered and superimposed attitude after shaping, which can to a certain extent reduce the interface effect between the glass fiber filaments and the resin, and greatly promote the complete filling speed of the subsequent resin curing agent mixture in the casting cavity. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a schematic diagram of the overall structure of the embodiment of the present application;

[0032] Figure 2 is a schematic diagram of the structure of the upper mold after turning up of the embodiment of the present application;

[0033] Figure 3 is a schematic diagram of the cross-sectional structure of the embodiment of the present application mainly used to show the knife collecting mechanism;

[0034] Figure 4 is a schematic diagram of the cross-sectional structure of the safety tank of the embodiment of the present application.

[0035] BRIEF DESCRIPTION OF DRAWINGS:

[0036] 1, lower mold; 11, lower cavity; 12, injection port; 13, embedded groove; 14, containing groove; 15, air-tight groove;

[0037] 2, upper die; 21, upper cavity; 23, suction port; 24, sink; 25, air-tight rubber strip;

[0038] 41, vacuum negative pressure device; 42, suction pipe; 43, safety tank; 44, air pipe; 45, three-way valve; 46, air pipe;

[0039] 51, molding knife; 52, knife receiving seat; 53, return spring; 54, pressing block. DETAILED DESCRIPTION

[0040] The technical solutions of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0041] The embodiments of the present application disclose a bracket casting system for a light panel mounting rack. Referring to Figure 1 and Figure 2 which comprises a lower die 1 and an upper die 2, and a heating device is built in each of the lower die 1 and the upper die 2 to promote the curing process of the resin, the upper die 2 is arranged to be lifted on the lower die 1, the lower die 1 is provided with a lower cavity 11, and the upper die 2 is provided with an upper cavity 21, and the upper cavity 21 and the lower cavity 11 form a casting cavity for the mounting rack to be produced after the lower die 1 and the upper die 2 are closed.

[0042] The casting system further comprises a mechanical arm and a glass fiber spray gun and a curing agent spray gun mounted on the mechanical arm (not shown in the figure), and the mechanical arm is configured to drive the glass fiber spray gun and the curing agent spray gun to move along the contour of the lower cavity 11. In a specific configuration, the mechanical arm can be a common three-axis manipulator, the length of the glass fiber filament sprayed by the glass fiber spray gun is 10mm-50mm, the ratio of the amount of curing agent sprayed by the curing agent spray gun to the amount of glass fiber filament sprayed by the glass fiber spray gun is less than the curing agent to 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.

[0043] The lower die 1 is provided with an injection port 12 communicating with the lower cavity 11, and the injection port 12 is used for pressurized injection of the mixed material of the resin curing agent; the upper die 2 is provided with a suction port 23 communicating with 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.

[0044] The lower mold 1 is provided with a groove 13 around the lower cavity 11, and the molding knife 51 is slidably arranged in the groove 13. The upper mold 2 and the lower mold 1 are provided with a knife collecting mechanism for driving the molding knife 51 to be completely embedded in the groove 13 when the two molds are closed. Specifically, for the main part of the support, the peripheral molding knife 51 is arranged around the casting cavity, and for the hollow part of the support, the embedded molding knife 51 is arranged in the casting cavity. The area between the peripheral molding knife 51 and the embedded molding knife 51 is the casting area.

[0045] Therefore, when casting the support of the light panel mounting frame, first, resin is injected 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 the thickness is not more than 1 / 2 of the depth of the lower cavity 11, the mechanical arm drives the glass fiber spray gun and the curing agent spray gun to enter the casting area between the peripheral molding knife 51 and the embedded molding knife 51, and moves along the set route. At the same time, a small amount of mist-shaped curing agent is sprayed by the curing agent spray gun, and glass fiber filaments are sprayed by the glass fiber spray gun. The 10mm-50mm long glass fiber filaments penetrate the curing agent mist layer and as far as possible into the uncured resin of the bottom wall of the lower cavity 11 under the power of the glass fiber spray gun, and form a spatially staggered and disordered glass fiber layer. At this time, the curing agent and the resin are combined to a certain extent, and the glass fiber filaments with spatial staggered and disordered arrangement are shaped to ensure the spatial distribution range of the glass fiber layer in the final product, thereby ensuring the structural strength of the finally cast product, and avoiding the delamination and debonding phenomenon of the traditional glass fiber cloth laying process.

[0046] The molding knife 51 can effectively limit the casting area, avoid the glass fiber filaments sprayed by the glass fiber spray gun from splashing out of the casting area, and affect the closing of the upper mold 2 and the lower mold 1, and cause the casting product to have more burrs and affect the production quality. Moreover, the glass fiber layer is sprayed by the glass fiber spray gun, which greatly improves the laying efficiency of the glass fiber layer, and is especially suitable for the production of supports with pattern and hollow design.

[0047] After the glass fiber layer is laid, the upper mold 2 and the lower mold 1 are closed, and under the action of the knife collecting mechanism, the modeling knife 51 is embedded into the embedding 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 vacuum negative pressure equipment 41 is used to vacuumize the casting cavity, and since the suction port 23 is arranged on the upper mold 2, a part of the resin in the lower cavity 11 can also infiltrate the glass fiber layer with a spatial staggered, disordered and superimposed posture during the vacuumization of the casting cavity, so that the interface effect between the glass fiber and the resin can be reduced to a certain extent, and the complete filling speed of the resin curing agent mixture in the casting cavity can be greatly promoted. After vacuumization is completed, the resin curing agent mixture is injected into the casting cavity through the injection port 12, the upper mold 2 and the lower mold 1 are heated to promote curing, and after the product in the casting cavity is completely cured, the product is taken out by lifting the upper mold 2, and the production is completed.

[0048] Specifically, referring to Figure 1 、 Figure 2 and Figure 3 , the above-mentioned knife collecting mechanism comprises:

[0049] The knife collecting seat 52 is arranged on the outside of the modeling knife 51 or in the middle of the modeling knife 51, for example, a plurality of knife collecting seats 52 are connected to the outside of the peripheral modeling knife 51, and one or more knife collecting seats 52 are connected to the inside of the embedded modeling knife 51, so that the stable downward movement of the modeling knife 51 can be ensured and the modeling knife 51 can be prevented from being stuck; the knife collecting seat 52 is fixedly connected with the modeling knife 51, and the accommodating groove 14 for accommodating the knife collecting seat 52 is arranged on the lower mold 1.

[0050] The reset spring 53 is arranged between the knife collecting seat 52 and the bottom wall of the accommodating groove 14.

[0051] The lower pressing block 54 is arranged in a plurality of positions corresponding to the plurality of knife collecting seats 52, and when the upper mold 2 and the lower mold 1 are closed, the lower pressing block 54 presses the knife collecting seat 52 and embeds it into the accommodating groove 14.

[0052] In addition, a plurality of sunken platforms 24 communicating with the upper cavity 21 are arranged on the lower end surface of the upper mold 2, and the projection of the sunken platform 24 on the lower mold 1 covers the corresponding part of the modeling knife 51 after the upper mold 2 and the lower mold 1 are closed. The air-tight rubber strip 25 is embedded in the upper cavity 21, the air-tight groove 15 corresponding to the air-tight rubber strip 25 is arranged on the upper end surface of the lower mold 1, the depth of the air-tight groove 15 is slightly smaller than the thickness of the air-tight rubber strip 25, and the width of the air-tight groove 15 is slightly larger than the width of the air-tight rubber strip 25.

[0053] In this way, when the upper mold 2 and the lower mold 1 are closed, the plurality of pressing blocks 54 on the upper mold 2 push the plurality of cutter receiving seats 52 connected with the molding cutter 51, so that the cutter receiving seats 52 are smoothly received in the corresponding accommodating grooves 14, and then under the extrusion of the upper mold 2 and the lower mold 1, the air-tight rubber strip 25 is embedded in the air-tight groove 15 and is extruded to be transversely deformed to seal the gap between the upper mold 2 and the lower mold 1, so that the air-tight effect of the casting cavity can be improved.

[0054] Moreover, since the lower end surface of the upper mold 2 is provided with a plurality of sink marks 24, after the mixed material of the resin curing agent is poured into the casting cavity, the mixed material flows into the sink marks 24 to be cured to form the excess material of the final product, and once the upper mold 2 is lifted, the cutter receiving seat 52 drives the molding cutter 51 to be lifted under the elastic deformation force of the reset spring 53, so that the upward pushing effect on the plurality of excess materials can be achieved, and then the product can be automatically lifted out of the lower mold cavity 11, so that the automatic demolding effect of the product can be achieved.

[0055] In addition, in another possible embodiment, referring to Figure 1 and Figure 4 The suction pipe 42 is further connected with a suction port 23, the suction pipe 42 is connected with a safety tank 43, the safety tank 43 is filled with a solvent for dissolving the resin, such as acetone, the solvent is filled to a depth higher than the bottom end of the suction pipe 42; the safety tank 43 and the vacuum negative pressure device 41 are connected with an air suction pipe 44, the suction pipe 42 extends to the bottom of the safety tank 43, and the air suction pipe 44 extends to the top of the safety tank 43.

[0056] The three-way valve 45 is further connected between the suction pipe 42 and the suction port 23, the other joint of the three-way valve 45 is connected with an air pipe 46, and the three-way valve 45 is configured to block the communication between the suction pipe 42 and the suction port 23 and connect the suction pipe 42 with the air pipe 46 when the resin in the suction pipe 42 is continuously sucked out.

[0057] In this way, by arranging the safety tank 43, the resin in the casting cavity can be prevented from being sucked out to damage the vacuum negative pressure device 41 when the casting cavity is vacuumized; and while the mixed material of the resin curing agent is pressurized and poured through the pouring port 12, the suction port 23 can still maintain the suction effect on the casting cavity, so that the filling speed of the mixed material in the casting cavity can be further improved, and the production efficiency can be improved. Once the resin in the suction pipe 42 is continuously sucked out, it means that the mixed material of the resin curing agent has been completely filled in the casting cavity, at this time, the three-way valve 45 closes the communication between the suction pipe 42 and the suction port 23 and connects the suction pipe 42 with the air pipe 46, and along with the continuous work of the vacuum negative pressure device 41, the clean air in the air pipe 46 can be sucked into the safety tank 43 through the suction pipe 42, so that the residual mixed material in the suction pipe 42 can be sucked into the safety tank 43, so as to prevent the residual mixed material from being solidified to block the suction pipe 42; and the mixed material entering the safety tank 43 is dissolved by the solvent, so that the solidification probability of the mixed material can be further reduced.

[0058] If necessary, air can be injected into the suction pipe 44 to pressurize the solvent in the safety tank 43 to the suction pipe 42 for backwashing.

[0059] This application discloses a casting method for a bracket for a skylight mounting frame, based on the above-described casting system for a skylight mounting frame, with reference to... Figure 1 , Figure 2 and Figure 3 It includes the following steps:

[0060] S1. Resin is injected into the lower cavity 11 through the injection port 12 to fill the entire lower cavity 11, and the resin depth in the lower cavity 11 does not exceed 1 / 2 of its depth.

[0061] S2. The mechanical arm controls the glass fiber spray gun and the curing agent spray gun to move along the contour of the lower cavity 11. The glass fiber spray gun and the curing agent spray gun spray glass fiber filaments and a small amount of curing agent into the resin of the lower cavity 11. The molding knife 51 limits the glass fiber filaments sprayed from the glass fiber spray gun, so that the glass fiber filaments with a spatially interlocked and overlapping shape are pre-shaped by the resin and curing agent. Among them, the curing agent sprayed from the curing agent spray gun contains a curing accelerator, which can accelerate the curing speed of the resin in the lower cavity 11, so that the glass fiber filaments sprayed into the resin of the lower cavity 11 can be shaped more quickly, ensuring the three-dimensional structure of the glass fiber layer.

[0062] S3. Close the upper mold 2 and the lower mold 1 so that the molding cutter 51 is embedded in the corresponding groove 13. Turn on the vacuum negative pressure device 41 and evacuate the casting cavity through the suction port 23. At the same time, use a small amount of resin in the lower cavity 11 to pre-impregnate the pre-shaped glass fiber filaments to minimize the interface effect between the glass fiber filaments and the subsequently injected resin curing agent, and promote the rapid filling of the mixture in the casting cavity.

[0063] S4. A mixture of resin and curing agent is injected into the casting cavity under high pressure through the injection port 12; after the mixture is continuously extracted from the suction port 23, the injection is stopped and the vacuum negative pressure device 41 is turned off.

[0064] S5. Heat to promote resin curing. After the product is fully cured, lift the upper mold 2 and demold the product.

[0065] In step S4, when the mixture is injected into the casting cavity, the mixture fills the recessed platform 24 reserved on the upper mold 2, so that the solidified product has residual material corresponding to the molding cutter 51 at the corresponding position of the recessed platform 24. The residual material is lifted by the rising of the molding cutter 51 after the upper mold 2 is lifted, so as to complete the automatic demolding of the product.

[0066] The implementation principle of a bracket casting system for a skylight mounting frame according to an embodiment of this application is as follows:

[0067] By first injecting resin into the lower cavity 11 of the lower mold 1 through the injection port 12, and then controlling the mechanical arm to drive the glass fiber spray gun and the curing agent spray gun into the casting area between the peripheral molding knife 51 and the several embedded molding knives 51, a small amount of misty curing agent is sprayed by the curing agent spray gun, and glass fiber filaments are sprayed by the glass fiber spray gun and penetrate through the curing agent mist layer and as far as possible into the uncured resin of the bottom wall of the lower cavity 11, and the glass fiber filaments are in a spatially staggered, disordered and superimposed layer, at this time the curing agent combines with the resin to a certain extent to cure, and the glass fiber filaments with a spatially staggered, disordered and superimposed posture are shaped to ensure the spatial distribution range of the glass fiber layer in the final product, thereby ensuring the structural strength of the finally cast molded product, and the phenomenon of delamination and debonding of the molded product caused by the traditional process of laying glass fiber cloth can be effectively avoided.

[0068] The molding knife 51 arranged can effectively limit the casting area, avoiding the glass fiber filaments sprayed by the glass fiber spray gun from splashing out of the casting area to affect the closing of the upper mold 2 and the lower mold 1 and cause more burrs of the cast product to affect the production quality. Moreover, the glass fiber layer is sprayed by the glass fiber spray gun, greatly improving the laying efficiency of the glass fiber layer, and being especially suitable for the production of supports with patterned, hollowed-out and other molding designs.

[0069] The casting cavity is vacuumed by the vacuum negative pressure device 41, and since the suction port 23 is arranged on the upper mold 2, a part of the resin in the lower cavity 11 will also promote the infiltration of the glass fiber layer with a spatially staggered, disordered and superimposed posture after shaping during the process of vacuuming the casting cavity, which can to a certain extent reduce the interfacial effect between the glass fiber filaments and the resin, and greatly promote the complete filling speed of the subsequent mixed resin curing agent in the casting cavity.

[0070] Unless otherwise defined, technical terms or scientific terms used in the present application shall be understood as having the usual meaning understood by a person with ordinary skill in the art to which the present application belongs. The use of "first", "second", "third" and similar words in the specification and claims of the present application does not represent any order, quantity or importance, but is only used to distinguish different components. "One" or "a" and similar words do not represent a quantity limitation, but represent the existence of at least one. "Include" or "contain" and similar words mean that the elements or objects appearing before "include" or "contain" cover the elements or objects listed after "include" or "contain" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to represent relative positional relationship, and when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0071] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: all equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A method of casting a support for a light panel mounting rack, using a casting system comprising a lower mold (1) having a lower mold cavity (11) and an upper mold (2) having an upper mold cavity (21), the upper mold cavity (21) and the lower mold cavity (11) forming a casting cavity of the support to be produced when the lower mold (1) and the upper mold (2) are closed, characterized in that, Further comprising a mechanical arm and a glass fiber spray gun and a curing agent spray gun mounted on the mechanical arm, the mechanical arm is configured to drive the glass fiber spray gun and the curing agent spray gun to walk along the profile of the lower cavity (11); The lower mold (1) is provided with a pouring port (12) communicating with the lower cavity (11), the pouring port (12) is used for pressurized pouring of the mixed material of the resin curing agent; the upper mold (2) is provided with a suction port (23) communicating with the upper cavity (21), the suction port (23) is connected with a vacuum negative pressure device (41), and the pouring port (12) and the suction port (23) are diagonally arranged; The lower mold (1) is provided with an embedding groove (13) surrounding and adhering to the edge of the lower cavity (11), a modeling knife (51) is slidably arranged in the embedding groove (13), and a knife collecting mechanism is arranged between the upper mold (2) and the lower mold (1) and used for driving the modeling knife (51) to be completely embedded in the embedding groove (13) when the upper mold (2) and the lower mold (1) are closed; The casting method comprises the following steps: S1. resin is injected into the lower cavity (11) through the pouring port (12) to fill the entire lower cavity (11), and the resin depth in the lower cavity (11) does not exceed 1 / 2 of the depth; S2. the mechanical arm controls the glass fiber spray gun and the curing agent spray gun to walk along the profile of the lower cavity (11), and the glass fiber spray gun and the curing agent spray gun spray glass fiber filaments and a small amount of curing agent into the resin in the lower cavity (11), the glass fiber filaments sprayed by the glass fiber spray gun are limited by the modeling knife (51), so that the glass fiber filaments with a spatial staggered superposition form are pre-shaped by the resin and the curing agent; S3. the upper mold (2) and the lower mold (1) are closed to embed the modeling knife (51) in the corresponding embedding groove (13), the vacuum negative pressure device (41) is started, the casting cavity is vacuumized through the suction port (23), and the pre-impregnated glass fiber filaments are pre-impregnated by a small amount of resin in the lower cavity (11); S4. the mixed material of resin and curing agent is high-pressure injected into the casting cavity through the pouring port (12); when the mixed material is continuously extracted from the suction port (23), the injection is stopped and the vacuum negative pressure device (41) is closed; S5. heating promotes resin curing, and the upper mold (2) is lifted and the product is demolded after the product is completely cured.

2. The method of claim 1, wherein the method is characterized by: The knife collecting mechanism comprises: A knife collecting seat (52) is arranged outside the modeling knife (51) or centrally arranged inside the modeling knife (51), the knife collecting seat (52) is fixedly connected with the modeling knife (51), and the lower mold (1) is provided with a containing groove (14) for accommodating the knife collecting seat (52); A reset spring (53) is arranged between the knife collecting seat (52) and the bottom wall of the containing groove (14). A plurality of lower pressing blocks (54) are arranged corresponding to the plurality of cutter receiving seats (52), and when the upper die (2) and the lower die (1) are closed, the lower pressing blocks (54) press the cutter receiving seats (52) and embed into the accommodating grooves (14).

3. The method of claim 2, wherein the method further comprises: forming the bracket by casting the bracket in a mold. A plurality of sunken platforms (24) are arranged on the lower end surface of the upper die (2) and communicate with the upper cavities (21), and when the upper die (2) and the lower die (1) are closed, the projections of the sunken platforms (24) on the lower die (1) cover the corresponding parts of the modeling cutters (51).

4. The method of claim 1, wherein the method is characterized by: The upper die (2) is embedded with an air-tight rubber strip (25) arranged around the upper cavities (21).

5. The method of claim 1-4, wherein, The suction port (23) is connected with a suction pipe (42), the suction pipe (42) is connected with a safety tank (43), the safety tank (43) and the vacuum negative pressure device (41) are connected with an air exhaust pipe (44), the suction pipe (42) extends to the inner bottom of the safety tank (43), and the air exhaust pipe (44) extends to the inner top of the safety tank (43).

6. The method of claim 5, wherein the method further comprises: forming the bracket by casting the bracket in a mold. The safety tank (43) is filled with a solvent for dissolving resin, and the solvent has a depth higher than the bottom end of the suction pipe (42).

7. The method of claim 5, wherein the method further comprises: forming a plurality of the support members in a single casting operation. The suction pipe (42) and the suction port (23) are communicated with a three-way valve (45), another connector of the three-way valve (45) is connected with an air pipe (46), and the three-way valve (45) is configured to block the communication between the suction pipe (42) and the suction port (23) when resin in the suction pipe (42) is continuously extracted, and connect the suction pipe (42) with the air pipe (46).

8. The method of claim 1, wherein the method further comprises: forming a plurality of the support brackets in a single casting operation. In step S4, when the mixed material is injected into the casting cavity, the mixed material is filled into the sunken platforms (24) reserved on the upper die (2), so that the product after solidification has excess material corresponding to the modeling cutters (51) at the corresponding positions of the sunken platforms (24), and the excess material is lifted by the rising of the modeling cutters (51) after the upper die (2) is lifted to complete the automatic demolding of the product.

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