Rearview mirror one-step in-mold spraying forming mold

Abstract

The rearview mirror one-step in-mold spraying forming mold comprises an upper mold body and a lower mold body, the upper mold body and the lower mold body are assembled to form a mold cavity, and sealing structures are arranged at the positions, around the mold cavity, of the top face of the lower mold body and the bottom face of the upper mold body. A spraying gap is formed among the upper mold, the top surface of the formed sample and the lower mold during mold closing and micro mold opening, and the sealing structure is suitable for sealing the outer end of the spraying gap and forming a sealing cavity. According to the sealing structure, the sealing performance of a mold cavity and a spraying gap during mold closing and micro mold opening can be guaranteed, so that one-step production of injection molding and spraying is facilitated; through one-time injection molding and paint spraying injection, an injection molding part with a high-brightness hard paint layer, a stronger stereoscopic impression and a more comfortable hand feeling structure surface can be obtained, and the process simplification and the reduction of defective products are facilitated.

Description

Technical Field

[0001] This application relates to the technical field of automotive parts production, and in particular to a one-step in-mold spraying and forming mold for rearview mirrors. Background Art

[0002] In the existing spraying process for rearview mirror paint, it is generally processed through a single step and requires multiple step processes such as surface solidification treatment, so the efficiency is low and the scrap rate is relatively high.

[0003] Sealing is an important step in the one-step in-mold spraying and forming process. For this reason, we propose a one-step in-mold spraying and forming mold with good sealing performance when the mold is slightly opened. Summary of the Invention

[0004] The purpose of this application is to provide a one-step in-mold spraying and forming mold for rearview mirrors.

[0005] To achieve the above purpose, the technical solution adopted in this application is: A one-step in-mold spraying and forming mold for rearview mirrors, including an upper mold and a lower mold. When the upper mold and the lower mold are closed, a mold cavity is formed. A sealing structure is provided around the mold cavity on the top surface of the lower mold and the bottom surface of the upper mold. When the mold is closed and slightly opened, a spraying gap is formed between the upper mold, the top surface of the formed sample, and the lower mold. The sealing structure is adapted to close the outer end of the spraying gap and form a sealed chamber.

[0006] As a preference, the sealing structure includes a sealing part and an avoidance groove. The avoidance groove and the sealing part are respectively and correspondingly arranged on the bottom surface of the upper mold and the top surface of the lower mold; the top of the sealing part exposes the bottom surface of the lower mold, and the depth of the avoidance groove is greater than or equal to the height of the exposed part of the sealing part; both the sealing part and the avoidance groove are annular structures surrounding the periphery of the mold cavity.

[0007] As a preference, the sealing part is made of rubber material; the width of the outer side of the top part of the sealing part is greater than the width of the bottom of the avoidance groove, and a conical guiding structure is formed on the top of the sealing part.

[0008] As a preference, the sealing part includes a deformation part and a support part from top to bottom. The deformation part is located inside the avoidance groove both when the mold is closed and slightly opened, and the guiding structure is formed on the top surface of the deformation part; when the mold is closed, the deformation part elastically deforms to closely fit with the avoidance groove.

[0009] As a preference, both the deformation part and the support part are hollow configurations. An air port is provided at the bottom of the support part, and the air port is connected to an air source. The air source is adapted to control the air pressure to control the expansion or contraction of the deformation part.

[0010] As a preference, the lower mold is provided with guide grooves on two opposite sides of its top, and the upper mold is provided with guide parts corresponding to the guide grooves, and the guide parts approach and enter the guide grooves when the molds are closed.

[0011] As a preference, an upper mold mounting plate is provided on the top of the upper mold, and the upper mold mounting plate is provided with a driving part; a first injection port and a second injection port are provided through the upper mold mounting plate and the middle of the upper mold.

[0012] Preferably, the portion of the sealing portion located above the top surface of the lower mold is a solid annular structure, and the portion of the sealing portion located below the top surface is a plurality of spaced-apart connecting columns, with a fixing portion integrally formed at the bottom of the connecting columns.

[0013] Preferably, one or more of the sealing structure, the upper mold, and the lower mold is provided with a vacuum port, and the vacuum port is formed in the spraying gap.

[0014] As a preference, a lower mold mounting plate and a bottom plate are provided at the bottom of the lower mold, and a demolding assembly is formed on the bottom plate corresponding to the lower mold; a limiting link is formed between the demolding assembly and the upper mold; when the upper mold is in the mold closing and slightly mold opening states, the limiting link compresses the demolding assembly; after the mold is opened, the limiting link cancels the restriction on the demolding assembly, so that the demolding assembly is reset to eject the molded product.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] The sealing structure can ensure the sealing of the mold cavity and the spraying gap during mold closing and micro-opening, thereby facilitating one-step production of injection molding and spraying. Through one-time injection molding and paint injection, injection-molded parts with a high-gloss hard paint layer, a stronger three-dimensional effect and a more comfortable feel can be obtained, which helps to simplify the process and reduce defective products. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0018] Figure 2 yes Figure 1 A sectional view of the top surface when cut downward in the length direction.

[0019] Figure 3 yes Figure 2 Schematic diagram after the upper mold moves up.

[0020] Figure 4 It is a schematic diagram of another sealing structure.

[0021] In the figure: 1. Upper template; 2. First injection port; 3. Second injection port; 4. Upper mold; 5. Fixing structure; 6. Lower mold; 7. Lower mold mounting plate; 8. Bottom plate; 9. Sealing part; 10. Avoidance groove; 11. Mold cavity; 12. Spraying gap; 13. Guide groove; 14. Deformation part; 15. Support part; 16. Air port. Detailed implementation manners

[0022] Next, in combination with the detailed implementation manners, the present application will be further described. It should be noted that, on the premise of non-conflict, the following-described embodiments or technical features can be arbitrarily combined to form new embodiments.

[0023] In the description of the present application, it should be noted that for the orientation terms, such as the terms "center", "horizontal", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the indicated orientation and position relationship are based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific protection scope of the present application.

[0024] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence.

[0025] The terms "including" and "having" in the description and claims of the present application and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0026] Embodiment:

[0027] Refer to Figures 1 to 4, this embodiment proposes a one-step in-mold spraying and forming mold for a rearview mirror, including an upper mold 4 and a lower mold 6. When the upper mold 4 and the lower mold 6 are closed, a mold cavity 11 is formed. A sealing structure is provided around the mold cavity 11 on the top surface of the lower mold 6 and the bottom surface of the upper mold 4. When the mold is closed and slightly opened, a spraying gap 12 is formed between the upper mold 4, the top surface of the formed sample, and the lower mold 6. The sealing structure is adapted to close the outer end of the spraying gap 12 and form a sealed chamber. Through the setting of the sealing structure in this embodiment, in both the closed-mold state and the slightly opened-mold state, the sealing structure can seal the spraying gap 12. During the first injection molding process when the mold is closed, after injection molding, the mold is slightly opened. At this time, there is a certain interval between the upper mold 4 and the lower mold 6 that form the mold cavity 11. At this time, the sealing structure is used for sealing. Thus, a gap for forming a sprayed layer is generated between the top of the injection-molded product produced in the first process and the above-mentioned spraying gap 12. At this time, the second spraying process is carried out, injecting the spraying material, which fuses with the injection-molded product to form the final product. Therefore, through one injection molding and paint injection, an injection-molded part with a high-brightness hard paint layer, a stronger three-dimensional sense, and a more comfortable hand feeling on the structural surface can be obtained, which helps to simplify the process and reduce defective products.

[0028] The sealing structure includes a sealing portion 9 and an avoidance groove 10. The avoidance groove 10 and the sealing portion 9 are respectively provided on the bottom surface of the upper mold 4 and the top surface of the lower mold 6 in a corresponding manner; the top of the sealing portion 9 exposes the bottom surface of the lower mold 6, and the depth of the avoidance groove 10 is greater than or equal to the height of the exposed portion of the sealing portion 9; both the sealing portion 9 and the avoidance groove 10 are annular structures surrounding the circumferential side of the mold cavity 11. The exposed portions of the avoidance groove 10 and the sealing portion 9 are joined and sealed. This seal has a certain depth. When the mold is closed and slightly opened, both the avoidance groove 10 and the sealing portion 9 remain in a joined and sealed state.

[0029] The sealing portion 9 is made of rubber material, so that the sealing portion 9 has the ability to elastically deform; the width of the outer side of the top portion of the sealing portion 9 is greater than the width of the bottom of the avoidance groove 10. A tapered guiding structure is formed on the top of the sealing portion 9. During installation, the guiding structure first contacts the avoidance groove 10, and through the guiding effect, the top of the sealing portion 9 is slightly deformed to form a tight fit with the avoidance groove 10, thus ensuring the sealing performance.

[0030] The sealing portion 9 includes a deformation portion 14 and a support portion 15 from top to bottom in sequence. The deformation portion 14 is located inside the avoidance groove 10 both when the mold is closed and slightly opened. The guiding structure is formed on the top surface of the deformation portion 14; when the mold is closed, the deformation portion 14 elastically deforms to closely fit with the avoidance groove 10.

[0031] As a preferred embodiment of the sealing portion 9, such as Figure 4As shown, both the deformation part 14 and the support part 15 are of hollow configurations. An air port 16 is provided at the bottom of the support part 15, and the air port 16 is connected to an air source, which is adapted to control the air pressure to cause the expansion or contraction of the deformation part 14. The above-mentioned sealing part 9 is generally solid. In this embodiment, the sealing part 9 can also be set to be hollow, and the shape of the sealing part 9 is controlled by air pressure. When the air pressure is relatively high, the sealing part 9 and the avoidance groove 10 can ensure the sealing performance after cooperation; when only the injection molding process is required without spraying, the gas inside the sealing part 9 is pumped out, and the sealing part 9 shrinks as a whole, while the support part 15 can ensure the general shape of the sealing part 9 after shrinking, so as to prevent damage caused by excessive shrinkage. When the mold is closed, the shrunk sealing part 9 and the avoidance groove 10 no longer interact or only have slight friction, which can prevent or reduce the wear during their contact, thus contributing to improving the service life.

[0032] As Figure 2 , Figure 3 shown, on the top of the lower mold 6, guiding grooves 13 are provided on opposite sides, and the upper mold 4 is provided with guiding parts corresponding to the guiding grooves 13. When the mold is closed, the guiding parts approach and enter the guiding grooves 13. The guiding parts and the guiding grooves 13 are adapted to position the mold during mold opening and closing. After the mold is closed, a fixing structure 5 can also be provided for fixing. The fixing structure 5 is used to fix the upper mold 4 and the lower mold 6 after the mold is closed, which is a common technology in the art, and its specific types are not limited herein.

[0033] On the top of the upper mold 4, an upper mold mounting plate 1 is provided, and the upper mold mounting plate 1 is provided with a driving part to drive the upper mold 4 to move up and down for mold closing and opening; as Figure 2 shown, a first injection port 2 and a second injection port 3 are formed through the middle of the upper mold mounting plate 1 and the upper mold 4. The first injection port 2 is used for injecting the raw material for mirror molding, and the second injection port 3 is used for injecting the spraying raw material for spraying the formed intermediate product. Polyurethane (PUR) or polyurea (PUA) can be used as the surface material for coating.

[0034] The part of the sealing part 9 above the top surface of the lower mold 6 is a solid ring structure, and the part of the sealing part 9 below the top surface is a plurality of connecting columns arranged at intervals. A fixing part is integrally formed at the bottom of the connecting columns. Obviously, the sealing part 9 needs to be in a ring configuration to form a seal for the spraying gap 12. The spaced connecting columns and the fixing part are the structures required to form the sealing part 9 in the lower mold 6.

[0035] Preferably, one or more of the sealing structure, the upper mold 4, and the lower mold 6 are provided with vacuum extraction ports, and the vacuum extraction ports are formed in the spraying gap 12. After vacuum extraction, it is convenient to perform secondary injection spraying in the relatively sealed spraying gap 12, and at the same time, the spraying quality can be ensured.

[0036] A lower die mounting plate 7 and a bottom plate 8 are provided at the bottom of the lower die 6. The bottom plate 8 is formed with a demolding assembly corresponding to the lower die 6; a limiting link is formed between the demolding assembly and the upper die 4; when the upper die 4 is in the mold closing and slightly opening states, the limiting link compresses the demolding assembly; after mold opening, the limiting link cancels the restriction on the demolding assembly, so that the demolding assembly resets to eject the molded product. Obviously, in this embodiment, the spray coating is formed on the top of the intermediate product. After the spraying is completed, the molding time of the product formed by the first injection molding is relatively long. Therefore, in this embodiment, the ejection mechanism is arranged on the lower die 6, and a limiting link is arranged to control the demolding timing. The limiting link is simply a rod body, which acts on the ejection mechanism when the upper die 4 is closed and slightly opened so that the ejection mechanism cannot be restored. When the mold is opened to a certain extent, the limiting link leaves, and at this time, the ejection mechanism can normally eject the product. The ejection mechanism with elastic ejection performance is a common technology in the art, so it is not specifically defined here. And it is easy to associate setting a rod body to limit the ejection timing of the ejection mechanism, so it will not be elaborated here.

[0037] The basic principles, main features and advantages of the present application have been described above. Those skilled in the art of this industry should understand that the present application is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present application. Without departing from the spirit and scope of the present application, the present application will have various changes and improvements, and these changes and improvements all fall within the scope of the present application claimed. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. An in-mold spraying and forming die for a rearview mirror, characterized in that, It includes an upper mold and a lower mold. When the upper mold and the lower mold are closed, a mold cavity is formed. A sealing structure is provided around the mold cavity on the top surface of the lower mold and the bottom surface of the upper mold. When the mold is closed and slightly opened, a spraying gap is formed between the upper mold, the top surface of the formed sample, and the lower mold. The sealing structure is adapted to close the outer end of the spraying gap and form a sealed chamber.

2. The in-mold spraying and forming die for rearview mirror according to claim 1, characterized in that, The sealing structure includes a sealing portion and an avoidance groove. The avoidance groove and the sealing portion are respectively provided on the bottom surface of the upper mold and the top surface of the lower mold correspondingly. The top of the sealing portion exposes the bottom surface of the lower mold. The depth of the avoidance groove is greater than or equal to the height of the exposed portion of the sealing portion. Both the sealing portion and the avoidance groove are annular structures surrounding the circumferential side of the mold cavity.

3. The in-mold spraying and forming die for rearview mirror according to claim 2, characterized in that, The sealing portion is made of rubber material. The width of the outer side of the top part of the sealing portion is greater than the width of the bottom of the avoidance groove. A tapered guiding structure is formed on the top surface of the sealing portion.

4. The in-mold spraying and forming die for rearview mirror according to claim 3, wherein, The sealing portion successively includes a deformation portion and a supporting portion from top to bottom. The deformation portion is located inside the avoidance groove both when the mold is closed and slightly opened. The guiding structure is formed on the top surface of the deformation portion. When the mold is closed, the deformation portion elastically deforms to closely fit with the avoidance groove.

5. The in-mold spraying and forming die for rearview mirror according to claim 4, wherein Both the deformation portion and the supporting portion are hollow configurations. An air port is provided at the bottom of the supporting portion. The air port is connected to an air source. The air source is adapted to control the air pressure to control the expansion or contraction of the deformation portion.

6. The in-mold spraying and forming die for rearview mirror according to claim 1, characterized in that Guiding grooves are provided on the top of the lower mold at opposite sides. Guiding portions are provided on the upper mold corresponding to the guiding grooves. When the mold is closed, the guiding portions approach and enter the guiding grooves.

7. The in-mold spraying and forming die for rearview mirror according to claim 1, characterized in that, An upper mold mounting plate is provided on the top of the upper mold. A driving portion is provided on the upper mold mounting plate. The upper mold mounting plate and the middle part of the upper mold are penetrated with a first injection port and a second injection port.

8. The in-mold spraying and forming die for the rearview mirror according to claim 2, wherein The part of the sealing portion above the top surface of the lower mold is a solid annular structure. The part of the sealing portion below the top surface is a plurality of connecting columns arranged at intervals. A fixing portion is integrally formed at the bottom of the connecting column.

9. The in-mold spraying and forming die for rearview mirror according to claim 1, wherein One or more of the sealing structure, the upper mold, and the lower mold are provided with a vacuum pumping port. The vacuum pumping port is formed in the spraying gap.

10. The in-mold spraying and forming die for rearview mirror according to claim 1, characterized in that, A lower mold mounting plate and a bottom plate are provided at the bottom of the lower mold. A demolding assembly is formed on the bottom plate corresponding to the lower mold. A limiting connecting rod is formed between the demolding assembly and the upper mold. When the upper mold is in the closed and slightly opened states, the limiting connecting rod compresses the demolding assembly. After the mold is opened, the limiting connecting rod cancels the restriction on the demolding assembly to enable the demolding assembly to reset and eject the formed product.

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