Mold and molding process for vehicle refrigerator cover

Abstract

This invention discloses a molding die and molding process for a vehicle refrigerator cover. The molding die includes a male mold, a female mold, a vacuuming device, and a control system. The male mold cavity in the male mold and the female mold cavity in the female mold can be connected to form a sealed molding cavity. The male mold is provided with a glue inlet. The female mold cavity is provided with a positioning structure and a sealing structure for sealing and fixing the pre-embedded parts of the cover surface layer. The female mold is also provided with a vacuuming channel that communicates with the sealed space formed by the pre-embedded parts of the cover surface layer and the bottom surface of the female mold cavity. The vacuuming device can evacuate the sealed space formed by the pre-embedded parts of the cover surface layer and the bottom surface of the female mold cavity. The molding process is as follows: first, the cover surface layer is positioned in the female mold cavity. Then, the injection molding machine first injects a certain amount of plastic material at low pressure, and then injects a certain amount of plastic material at high pressure to deform the real aluminum layer of the cover surface layer and fill the hollow structure of the real wood layer. This invention achieves efficient production of vehicle refrigerator covers by forming a metal relief structure on the base layer and the surface of the cover through injection molding.

Description

Technical Field

[0001] This invention relates to the field of automotive interior design, and in particular to a mold and molding process for a car refrigerator cover. Background Technology

[0002] Many cars are equipped with car refrigerators. The cover of the car refrigerator is usually consistent with the interior of the car. For cars with real wood interiors, the surface of the car refrigerator cover is also real wood. Generally, the car brand logo is designed on the surface of the car refrigerator cover. The common way is to print it on the surface of the real wood layer. This method is easy to peel off and has poor aesthetics.

[0003] Currently, some car refrigerators are using metal inlays on their covers, with car brand logos formed on the surface. This method improves the overall aesthetics of the car refrigerator cover. The current process involves: first, machining a raised structure onto a metal plate; then grinding the raised structure to make its surface smooth; and finally, laser engraving the car brand logo onto the raised structure's surface. Next, a hollow structure matching the raised structure is formed on the surface of a real wood layer using laser engraving or machining. The real wood layer and the metal plate are then bonded together, with the raised structure inserted into the hollow structure of the real wood layer. A plastic base is then injection molded, and finally, the base is bonded to the metal plate. This manufacturing process is cumbersome, has low production efficiency, and is prone to defects during production. Furthermore, there is a large gap between the raised structure on the metal base and the hollow structure of the real wood layer, which allows dust to enter over time, affecting the car refrigerator's appearance. Summary of the Invention

[0004] To overcome the above-mentioned defects, the present invention provides a mold and molding process for a vehicle refrigerator cover. The mold and molding process for the vehicle refrigerator cover allow metal relief patterns to be tightly embedded on the real wood layer of the vehicle refrigerator cover.

[0005] The technical solution adopted by this invention to solve its technical problem is as follows: a vehicle refrigerator cover forming mold, including a male mold, a female mold, a vacuuming device, and a control system. The male mold has a male mold cavity and a glue inlet communicating with the inside of the male mold cavity. The female mold has a female mold cavity, which is provided with a positioning structure and a sealing structure. The positioning structure can stop the cover surface layer in the female mold cavity. The sealing structure forms a sealed space between the cover surface layer and the bottom surface of the female mold cavity. The female mold has a vacuuming channel. One end of the vacuuming channel is sealed and connected to the sealed space formed by the cover surface layer and the bottom surface of the female mold cavity. The other end of the vacuuming channel is sealed and connected to the vacuuming device. The vacuuming device can evacuate the sealed space formed by the cover surface layer and the bottom surface of the female mold cavity to a set vacuum degree. The control system controls the start and stop of the vacuuming device.

[0006] As a further improvement of the present invention, the vacuuming device includes a core-pulling slider and a core-pulling slider driving device that are dynamically sealed and inserted into the vacuuming channel of the mother mold, and the control system controls the start and stop of the core-pulling slider driving device.

[0007] As a further improvement of the present invention, one end of the vacuum channel on the master mold is directly opposite the part of the real aluminum layer on the cover plate surface to be deformed.

[0008] As a further improvement of the present invention, the core-pulling slider has an undulating pattern or text formed on the surface of the end facing the cover plate.

[0009] As a further improvement of the present invention, the positioning structure is a positioning groove provided on the bottom surface of the mother model cavity, which matches the shape of the cover plate surface layer facing the bottom surface of the mother model cavity. The cover plate surface layer can be stopped and accommodated in the positioning groove. The sealing structure is a first sealing ring provided around the opening end of the positioning groove.

[0010] As a further improvement of the present invention, the male mold is provided with a second sealing ring and at least one guide protrusion on the outer periphery of the male mold cavity, and the female mold is provided with a sealing groove and at least one guide groove on the outer periphery of the female mold cavity. The second sealing ring on the male mold can be sealed and inserted into the sealing groove of the female mold to seal and connect the male mold cavity and the female mold cavity. The guide protrusions can be inserted into the guide grooves one by one.

[0011] A process for molding a car refrigerator cover includes the following steps:

[0012] Step 1: Fix the real wood layer onto the surface of the real aluminum layer to form a cover plate, and create a hollow structure on the real wood layer;

[0013] Step 2: Place the cover plate surface layer into the mother mold cavity of the automotive refrigerator cover plate molding mold installed on the injection molding machine and seal and position it.

[0014] Step 3: Close the mold for the vehicle refrigerator cover.

[0015] Step 4: The injection molding machine injects a fixed amount of plastic material into the cavity of the mold for forming the car refrigerator cover through the sprue at low pressure.

[0016] Step 5: The vacuuming device starts to draw a vacuum, and at the same time, the injection molding machine injects a certain amount of plastic material into the cavity of the car refrigerator cover molding mold through the glue inlet. The plastic material squeezes the real aluminum layer in the car refrigerator cover molding mold, causing the real aluminum layer to deform into the hollow structure of the real wood layer until it completely fills the hollow structure of the real wood layer. After holding the pressure for a set time, the plastic material solidifies to form a base layer with an integral structure with the cover surface layer.

[0017] As a further improvement of the present invention, in step four, the injection molding machine injects plastic material into the cavity of the car refrigerator cover molding mold at a pressure of 0.1MPa to 0.2MPa until the plastic material just fills the cavity. While the plastic material injected in step four is still in a molten state, in step five, the injection molding machine injects plastic material into the cavity of the car refrigerator cover molding mold at a pressure of 0.2MPa to 5MPa. The plastic material in the cavity of the car refrigerator cover molding mold extrudes and deforms the real aluminum layer and embeds it into the hollow structure on the real wood layer through the injection pressure.

[0018] As a further improvement of the present invention, the vacuuming device is a core-pulling slider that is sealed and slidably inserted into the vacuuming channel of the master mold. In steps two to four, the core-pulling slider is inserted into the hollow structure of the real wood layer and supported on the surface of the real aluminum layer. In step five, the core-pulling slider slides to align with the surface of the real wood layer. The real aluminum layer deforms synchronously with the core-pulling slider, and the deformation of the real aluminum layer embeds into the hollow structure of the real wood layer, ultimately forming a metal relief embedded structure that is flush with the surface of the real wood layer. The pattern on the surface of the metal relief embedded structure protrudes from the surface of the real wood layer by a set height.

[0019] As a further improvement of the present invention, the real wood layer is bonded to the real aluminum layer with an adhesive, and then the two are hot-pressed by a hot-pressing device, and then a hollow structure is formed on the surface of the real wood layer by laser engraving.

[0020] The beneficial effects of this invention are as follows: This invention places the cover plate surface layer formed by the composite of a real wood layer and a real aluminum layer inside a mold for forming a car refrigerator cover plate. The mold is then injection molded using an injection molding machine. On one hand, a plastic base layer is integrally formed on the surface of the real aluminum layer facing away from the real wood layer to support the cover plate surface layer and facilitate its installation with the main structure of the car refrigerator. On the other hand, through two stages of injection molding, the injection pressure and vacuum suction are used to accurately extrude and deform the real aluminum layer, filling it into the hollow structure of the real wood layer. The raised and recessed patterns on the core-pulling slider create raised and recessed patterns on the surface of the real aluminum layer embedded in the hollow structure of the real wood layer, thus forming a metal embedded relief structure on the surface of the real wood layer of the refrigerator cover plate. Furthermore, there is no gap between the metal relief structure and the sidewalls of the hollow portion of the real wood layer, preventing dust from falling in during use. The raised and recessed patterns on the surface of the metal relief structure are smoother and more aesthetically pleasing. This invention enables efficient production of car refrigerator covers, avoids extensive machining operations, has low production costs, saves labor and materials, and produces aesthetically pleasing finished products. Attached Figure Description

[0021] Figure 1 This is a front view of the product formed using the present invention;

[0022] Figure 2 This is a right view of the product formed using the present invention;

[0023] Figure 3 This is a perspective view of the master mold of the present invention;

[0024] Figure 4 This is an exploded view of the mold for forming the vehicle refrigerator cover of the present invention;

[0025] Figure 5 This is a schematic diagram of the first injection molding stage of the vehicle refrigerator cover molding die of the present invention;

[0026] Figure 6 for Figure 5 Enlarged view of section A in the middle;

[0027] Figure 7 This is a schematic diagram of the second injection molding stage of the vehicle refrigerator cover molding die of the present invention;

[0028] Figure 8 for Figure 7 Enlarged view of section B in the middle;

[0029] Figure 9 This is a schematic diagram of the cover plate surface layer structure of the present invention;

[0030] Figure 10 This is a schematic diagram illustrating the product molding principle of the present invention. Detailed Implementation

[0031] Example: A mold for forming a car refrigerator cover includes a male mold 1, a female mold 2, a vacuuming device, and a control system. The male mold 1 has a male mold cavity 11 and a glue inlet communicating with the inside of the male mold cavity 11. The female mold 2 has a female mold cavity 21. The female mold cavity 21 has a positioning structure and a sealing structure. The positioning structure can stop the cover surface layer in the female mold cavity 21. The sealing structure forms a sealed space between the cover surface layer and the bottom surface of the female mold cavity 21. The female mold 2 has a vacuuming channel 23. One end of the vacuuming channel 23 is sealed and connected to the sealed space formed by the cover surface layer and the bottom surface of the female mold cavity 21. The other end of the vacuuming channel 23 is sealed and connected to the vacuuming device. The vacuuming device can evacuate the sealed space formed by the cover surface layer and the bottom surface of the female mold cavity 21 to a set vacuum level. The control system controls the start and stop of the vacuuming device.

[0032] Before injection molding, the cover layer of the car refrigerator cover is first positioned in the mother mold cavity 21. Then, the male mold 1 and the female mold 2 are closed to start injection molding. The injection pressure of the injection molding machine integrally molds the car refrigerator cover and the cover layer, while extruding and deforming the weak structural parts of the real aluminum layer 3 formed by material removal on the cover layer 3. Finally, a metal embedded relief structure is formed on the surface of the car refrigerator cover. The metal embedded relief structure formed on the surface of the car refrigerator cover has no gap with the real wood layer 31 on the surface of the car refrigerator cover, avoiding dust accumulation and difficulty in cleaning during use. At the same time, the concave and convex patterns on the surface of the metal relief structure are smoother and more beautiful. This application eliminates the need for machining and stamping of the metal layer of the car refrigerator cover, thus improving the production efficiency of the car refrigerator cover, reducing the price and production cost, saving labor and materials, and making the finished product more beautiful.

[0033] This application may also install a pressure sensing device in the male mold cavity 11. The pressure sensing device senses the internal pressure of the male mold cavity 11. After communicating with the control system, the pressure sensing device transmits the pressure value inside the cavity to the control system in real time so that the control system can accurately control the injection molding machine to inject.

[0034] The vacuuming device includes a core-pulling slider 24 dynamically sealed within the vacuuming channel 23 of the mother mold 2 and a driving device for the core-pulling slider 24. The control system controls the start and stop of the driving device for the core-pulling slider 24. The core-pulling slider 24 slides within the vacuuming channel 23 of the mother mold 2, thus creating a vacuum. Simultaneously, it makes close contact with the deformable metal layer of the cover plate surface, providing support and shaping. Alternatively, the vacuuming device can be a negative pressure generator or other vacuuming devices.

[0035] One end of the vacuum channel 23 on the master mold 2 is aligned with the part of the real aluminum layer on the cover plate surface that needs to be deformed. This ensures that the part of the cover plate surface that needs to be deformed is accurately embedded into the real wood layer 31, avoiding damage to the real wood layer 31.

[0036] The core-pulling slider 24 forms undulating patterns or text on the surface of the cover plate. This structure allows the metal layer on the cover plate to deform and embed into the real wood layer 31 to form an embedded structure, while simultaneously forming undulating patterns on the surface of the embedded part, thus simultaneously forming a relief structure. This avoids the need for subsequent laser engraving, further reducing production costs and improving production efficiency.

[0037] The positioning structure is a positioning groove on the bottom surface of the mother model cavity 21, which matches the shape of the cover plate surface layer facing the bottom surface of the mother model cavity 21. The cover plate surface layer can be stopped and accommodated in the positioning groove. The sealing structure is a first sealing ring 22 provided around the opening end of the positioning groove.

[0038] The male mold 1 is provided with a second sealing ring 13 and at least one guide protrusion 12 on the outer periphery of the male mold cavity 11. The female mold 2 is provided with a sealing groove 26 and at least one guide groove on the outer periphery of the female mold cavity 21. The second sealing ring 13 on the male mold 1 can be sealed and inserted into the sealing groove 26 of the female mold 2 to seal and connect the male mold cavity 11 and the female mold cavity 21. The guide protrusions 12 can be inserted into the guide grooves one by one.

[0039] A process for molding a car refrigerator cover includes the following steps:

[0040] Step 1: Fix the real wood layer 31 onto the surface of the real aluminum layer 32 to form the cover plate layer 3, and make a hollow structure 311 on the real wood layer 31;

[0041] Step 2: Place the cover plate surface layer 3 into the mother mold cavity 21 of the vehicle refrigerator cover plate molding mold installed on the injection molding machine and seal and position it.

[0042] Step 3: Close the mold for the vehicle refrigerator cover.

[0043] Step 4: The injection molding machine injects a fixed amount of plastic material into the cavity of the mold for forming the car refrigerator cover through the sprue at low pressure.

[0044] Step 5: The vacuuming device starts to draw a vacuum. At the same time, the injection molding machine injects a certain amount of plastic material into the cavity of the car refrigerator cover molding mold through the glue inlet. The plastic material squeezes the real aluminum layer 32 in the car refrigerator cover molding mold, causing the real aluminum layer 32 to deform into the hollow structure 311 of the real wood layer 31 until it completely fills the internal space of the hollow structure 311 of the real wood layer 31. After holding the pressure for a set time, the plastic material solidifies to form a base layer 33 that is integrated with the cover surface layer.

[0045] In step four, the injection molding machine injects plastic material into the cavity of the car refrigerator cover molding mold at a pressure of 0.1MPa to 0.2MPa until the plastic material just fills the cavity. While the plastic material injected in step four is still in a molten state, in step five, the injection molding machine injects plastic material into the cavity of the car refrigerator cover molding mold at a pressure of 0.2MPa to 5MPa. The plastic material in the cavity of the car refrigerator cover molding mold is deformed by the injection pressure and embedded into the hollow structure 311 on the real wood layer 31.

[0046] The vacuuming device is a core-pulling slider 24 that is sealed and slidably inserted into the vacuuming channel 23 of the mother mold 2. In steps two to four, the core-pulling slider 24 is inserted into the hollow structure 311 of the real wood layer 31 and supported on the surface of the real aluminum layer 32. In step five, the core-pulling slider 24 slides to align with the surface of the real wood layer 31. The real aluminum layer 32 deforms synchronously with the core-pulling slider 24, and the part of the real aluminum layer 32 that is deformed and embedded in the hollow structure 311 of the real wood layer 31 finally forms a metal relief embedded structure 321 that is flush with the surface of the real wood layer 31. The pattern on the surface of the metal relief embedded structure 321 protrudes from the surface of the real wood layer 31 by a set height.

[0047] After the real wood layer 31 is bonded to the real aluminum layer 32 with an adhesive, the two are hot-pressed together by a hot-pressing device, and then a hollow structure 311 is formed on the surface of the real wood layer 31 by laser engraving.

[0048] The injection molding machine of this application performs injection molding in two stages. In the first stage, the plastic raw material fills the molding cavity. At this time, the core-pulling slider 24 passes through the hollow structure 311 of the real wood layer 31 and contacts the surface of the real aluminum layer 32 to form support. In the second stage of injection molding, the core-pulling slider 24 is pulled and slid, forming a negative pressure between the bottom surface of the mother mold 2 and the cover plate surface layer 3. At the same time, the injection molding machine applies pressure again, filling the cavity created by the real wood layer 31 and the retraction of the core-pulling slider 24 with the pressure of the injection molding machine, and finally forming a metal relief structure on the real wood of the refrigerator cover plate.

Claims

1. A molding process for a vehicle refrigerator cover, characterized in that: A vehicle refrigerator cover is formed using a vehicle refrigerator cover forming mold. The vehicle refrigerator cover forming mold includes a male mold (1), a female mold (2), a vacuum device, and a control system. The male mold has a male mold cavity (11) and a glue inlet that communicates with the inside of the male mold cavity. The female mold has a female mold cavity (21) and a positioning structure and a sealing structure. The positioning structure can stop the cover surface layer in the female mold cavity, and the sealing structure forms a sealed space between the cover surface layer and the bottom surface of the female mold cavity. The female mold has a vacuum channel (23). One end of the vacuum channel is sealed and communicates with the sealed space formed by the cover surface layer and the bottom surface of the female mold cavity, and the other end of the vacuum channel is sealed to the vacuum device. The vacuuming device can evacuate the sealed space formed by the cover plate surface layer and the bottom surface of the mother mold cavity to a set vacuum level. The vacuuming device includes a core-pulling slider (24) dynamically sealed in the vacuuming channel of the mother mold and a core-pulling slider driving device. The control system controls the start and stop of the core-pulling slider driving device. One end of the vacuuming channel on the mother mold is directly opposite the part of the aluminum layer to be deformed on the cover plate surface layer. The core-pulling slider (24) slides in the vacuuming channel (23) of the mother mold (2) to form a vacuuming operation. At the same time, it is in close contact with the aluminum layer of the cover plate surface layer while vacuuming, and plays a supporting and shaping role. By using the injection pressure and vacuum suction force, the aluminum layer is accurately squeezed and deformed to fill the hollow structure of the wood layer. The molding process for the car refrigerator cover includes the following steps: Step 1: Fix the real wood layer (31) onto the surface of the real aluminum layer (32) to form a cover plate layer (3), and make a hollow structure (311) on the real wood layer. Step 2: Place the cover plate surface layer into the mother mold cavity of the automotive refrigerator cover plate molding mold installed on the injection molding machine and seal and position it. Step 3: Close the mold for the vehicle refrigerator cover. Step 4: The injection molding machine injects a fixed amount of plastic material into the cavity of the mold for forming the car refrigerator cover through the sprue at low pressure. Step 5: The vacuuming device starts to vacuum, and at the same time, the injection molding machine injects a certain amount of plastic material into the cavity of the car refrigerator cover molding mold through the glue inlet. The plastic material squeezes the real aluminum layer in the car refrigerator cover molding mold, causing the real aluminum layer to deform into the hollow structure of the real wood layer until it completely fills the hollow structure of the real wood layer. After the pressure is held for a set time, the plastic material is cured to form a base layer (33) that is integrated with the cover surface layer.

2. The forming process for the vehicle refrigerator cover according to claim 1, characterized in that: The core-pulling slider forms undulating patterns or text on the surface of the cover plate at one end.

3. The forming process for the vehicle refrigerator cover according to claim 1, characterized in that: The positioning structure is a positioning groove on the bottom surface of the mother model cavity that matches the shape of the cover plate surface layer facing the bottom surface of the mother model cavity. The cover plate surface layer can be stopped and accommodated in the positioning groove. The sealing structure is a first sealing ring (22) provided around the opening end of the positioning groove.

4. The forming process for the vehicle refrigerator cover according to claim 1, characterized in that: The male mold is provided with a second sealing ring (13) and at least one guide protrusion (12) on the outer periphery of the male mold cavity. The female mold is provided with a sealing groove (26) and at least one guide groove (25) on the outer periphery of the female mold cavity. The second sealing ring on the male mold can be sealed and inserted into the sealing groove of the female mold to seal and connect the male mold cavity and the female mold cavity. The guide protrusion can be inserted into the guide groove one by one.

5. The forming process for the vehicle refrigerator cover according to claim 1, characterized in that: In step four, the injection molding machine injects plastic material into the cavity of the car refrigerator cover molding mold at a pressure of 0.1MPa to 0.2MPa until the plastic material just fills the cavity. While the plastic material injected in step four is still in a molten state, in step five, the injection molding machine injects plastic material into the cavity of the car refrigerator cover molding mold at a pressure of 0.2MPa to 5MPa. The plastic material in the cavity of the car refrigerator cover molding mold extrudes and deforms the real aluminum layer and embeds it into the hollow structure on the real wood layer through the injection pressure.

6. The forming process for the vehicle refrigerator cover according to claim 1, characterized in that: The vacuuming device is a core-pulling slider that is sealed and slidably inserted into the vacuuming channel of the master mold. In steps two to four, the core-pulling slider is inserted into the hollow structure of the real wood layer and supported on the surface of the real aluminum layer. In step five, the core-pulling slider slides to align with the surface of the real wood layer. The real aluminum layer deforms synchronously with the core-pulling slider, and the deformation of the real aluminum layer embeds into the hollow structure of the real wood layer, ultimately forming a metal relief embedded structure (321) that is flush with the surface of the real wood layer. The pattern on the surface of the metal relief embedded structure protrudes from the surface of the real wood layer by a set height.

7. The forming process for the vehicle refrigerator cover according to claim 1, characterized in that: The real wood layer is bonded to the real aluminum layer with an adhesive, and then the two are hot-pressed together using a hot-pressing molding device. Finally, a hollow structure is formed on the surface of the real wood layer by laser engraving.

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