Two-shot engraving equipment and two-shot engraving method

Abstract

This invention discloses a two-shot engraving device and method, relating to the field of injection molding technology. The two-shot engraving device includes a rear mold, a two-shot mold, a front mold, and an ejector assembly. One end of the rear mold forms a support surface, and a channel extending to the support surface is formed within the rear mold. The two-shot mold is positioned opposite the rear mold and can move towards the molding part to surround the outer periphery of the molding part, or move away from the molding part to detach from it. The front mold, the two-shot mold, and the first-shot product can form a two-shot cavity. The ejector assembly is positioned corresponding to the channel and can extend into the channel, moving towards the front mold to eject the support surface and lift the first-shot product for engraving. This invention, through the cooperation of the front mold and the two-shot mold, provides space for the outer surface of the first-shot product, preventing pressure on the outer surface and avoiding defects caused by pressure, thus improving the yield of the first-shot product.

Description

Technical Field

[0001] This invention relates to the field of molding technology, and in particular to a two-shot engraving device and a two-shot engraving method. Background Technology

[0002] During the injection molding process, specific patterns or text need to be engraved on the first-shot products to distinguish between different first-shot or second-shot products, so as to facilitate the traceability of the mold when product defects occur.

[0003] The existing engraving process usually involves setting a raised structure on the rear mold, pressing the product together with the front and rear molds, and using overpressure to press the raised structure onto the side of the product facing the rear mold (non-appearance surface) to create a pattern identical to the raised structure, thus achieving engraving. However, this method can cause the side of the product facing the front mold (appearance surface) to be subjected to overpressure, resulting in defects or damage, and reducing the yield of the product. Summary of the Invention

[0004] The main objective of this invention is to provide a two-shot engraving device and method, which aims to solve the problem in the prior art where the appearance of the first-shot product is subjected to excessive pressure during engraving, resulting in defects or damage and a decrease in the yield of the first-shot product.

[0005] To achieve the above objectives, the present invention proposes a two-shot engraving device for engraving and forming a two-shot product from a first-shot product, wherein the first-shot product includes a forming part, and the two-shot engraving device includes:

[0006] A rear mold, one end of which forms a support surface for supporting the injection product, and a channel extending to the support surface is provided inside the rear mold;

[0007] The two-shot mold is disposed opposite to the rear mold. The two-shot mold can move toward the molding part to surround the outer periphery of the molding part, or move away from the molding part to separate from the molding part.

[0008] A front mold is disposed opposite to the second-shot mold and can move away from the second-shot mold to detach from it, or move closer to the second-shot mold to assemble with it. When the front mold is close to the second-shot mold and the second-shot mold is close to the molding part, the front mold, the second-shot mold, and the first-shot product can form a second-shot cavity, which is used to form the second-shot product on the first-shot product.

[0009] A ejector assembly is arranged corresponding to the channel and is capable of extending into the channel when the front mold is away from the two-shot mold and the two-shot mold is disengaged from the forming portion, moving the ejector toward the front mold to eject the support surface and lift the one-shot product to mark the one-shot product.

[0010] In an embodiment, the one-shot product further comprises a positioning portion arranged at an angle with the forming portion, the positioning portion is formed from a side edge of the forming portion, the channel is arranged corresponding to an end of the positioning portion away from the forming portion, the two-shot mold cover is arranged on the one-shot product and a mating surface parallel to the positioning portion is formed corresponding to the positioning portion, the mating surface is arranged spaced apart from the positioning portion when the two-shot mold is arranged around the outer periphery of the forming portion.

[0011] In an embodiment, the ejector assembly comprises a driving member and an ejector pin connected to the driving member, at least a portion of the ejector pin is arranged in the channel, the driving member is arranged outside the channel, and the driving member is used to drive the ejector pin to move toward the front mold to eject the support surface and lift the one-shot product to mark the one-shot product when the front mold is away from the two-shot mold and the two-shot mold is disengaged from the forming portion.

[0012] The driving member is further used to drive the ejector pin to move away from the front mold to retract the channel when the front mold is close to the two-shot mold and / or the two-shot mold is arranged around the outer periphery of the forming portion.

[0013] In an embodiment, an end surface of the ejector pin parallel to the forming portion is arranged with protrusions protruding toward the forming portion, the number of the protrusions is multiple, and the multiple protrusions are arranged spaced apart and form a preset pattern.

[0014] In an embodiment, the ejector pin is detachably connected to the driving member.

[0015] In an embodiment, the two-shot mold comprises a first sub-mold and a second sub-mold, the mating surface is arranged on the first sub-mold, the first sub-mold and the second sub-mold are combined to form a forming hole capable of being arranged around the outer periphery of the forming portion, and the hole wall of the forming hole, the front mold and the one-shot product can form the two-shot cavity to form the two-shot product around the outer periphery of the forming portion.

[0016] The first sub-mold and the second sub-mold are capable of moving toward each other to splice to form the two-shot mold and make the forming hole arranged around the outer periphery of the forming portion, or moving away from each other to separate the two-shot mold.

[0017] In an embodiment, the support surface is provided with a limiting block protruding towards the front mold, and the one-shot product is provided with a limiting hole penetrating through the one-shot product, and when the one-shot product is supported on the support surface, the limiting block and the limiting hole are inserted and matched to limit the one-shot product.

[0018] The application also provides a two-shot imprinting method applied to the two-shot imprinting device, and the two-shot imprinting method comprises the following steps:

[0019] The two-shot mold, the front mold and the one-shot product are enclosed to form the two-shot cavity.

[0020] A two-shot product is formed in the two-shot cavity.

[0021] The two-shot mold and the front mold are separated from the one-shot product.

[0022] The ejector assembly ejects the support surface towards the front mold and lifts the one-shot product to imprint the one-shot product.

[0023] In an embodiment, the one-shot product further comprises a positioning part arranged at an angle with the forming part, the two-shot mold comprises a first sub-mold and a second sub-mold, and the first sub-mold and the second sub-mold are combined to form a forming hole capable of enclosing the outer periphery of the forming part.

[0024] The step of enclosing the two-shot mold, the front mold and the one-shot product to form the two-shot cavity comprises:

[0025] The first sub-mold and the second sub-mold are moved towards each other to splice to form the two-shot mold, so that the forming hole encloses the outer periphery of the forming part.

[0026] The front mold is moved towards the two-shot mold to make the hole wall of the forming hole, the front mold and the one-shot product enclose the two-shot cavity.

[0027] In an embodiment, the step of separating the two-shot mold and the front mold from the one-shot product comprises:

[0028] The front mold is moved away from the two-shot mold to separate the front mold from the two-shot mold and the one-shot product.

[0029] The first sub-mold and the second sub-mold are moved away from each other to misalign the positioning part with the first sub-mold and misalign the second sub-mold with the forming part, so as to separate the two-shot mold and separate the two-shot mold from the one-shot product.

[0030] In the technical solution of this invention, the first-shot product is placed on a supporting surface. The second-shot mold moves towards the molding part, and the front mold moves towards the second-shot mold. The second-shot mold, the front mold, and the first-shot product form a second-shot cavity, forming the second-shot product. At this time, the front mold moves away from the second-shot mold, and the second-shot mold moves away from the molding part, freeing up space in the direction facing the front mold of the first-shot product. The side of the first-shot product facing the front mold is no longer under pressure. Then, the ejector pin assembly moves along the channel towards the front mold, ejecting the first-shot product. The weight of the first-shot product and the structure of the ejector pin assembly are used to carve a slight mark on the side of the first-shot product facing the rear mold, thereby achieving differentiation of the first-shot products. This invention, through the cooperation of the front mold and the second-shot mold, frees up space in the direction facing the appearance surface of the first-shot product, preventing pressure on the appearance surface. Then, the ejector pin assembly carves the mark on the non-appearance surface of the first-shot product, avoiding damage to the appearance surface and improving the yield of the first-shot product. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the mold closing structure of a two-shot engraving device according to an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of the mold opening process of a two-shot engraving device according to an embodiment of the present invention;

[0034] Figure 3 This is a schematic diagram of the hidden front mold of a two-shot engraving device according to an embodiment of the present invention;

[0035] Figure 4 This is a schematic diagram of the hidden front mold and the second-shot mold of a two-shot engraving device provided in an embodiment of the present invention;

[0036] Figure 5 This is a schematic diagram of the structure of the rear mold of a two-shot engraving device provided in an embodiment of the present invention;

[0037] Figure 6 This is a flowchart of a two-shot imprinting method provided in an embodiment of the present invention;

[0038] Figure 7 This is a detailed flowchart of step S100 of the two-shot imprinting method provided in an embodiment of the present invention;

[0039] Figure 8 This is a detailed flowchart of step S200 of the two-shot imprinting method provided in an embodiment of the present invention.

[0040] Explanation of icon numbers:

[0041] 100. Two-shot engraving equipment; 1. Rear mold; 11. Support surface; 12. Channel; 13. Limiting block; 2. Two-shot mold; 21. First sub-mold; 22. Second sub-mold; 23. Molding hole; 24. Mating surface; 3. Front mold; 4. Two-shot cavity; 5. Ejector assembly; 51. Ejector pin; 52. Protrusion; 200. One-shot product; 201. Molding part; 202. Positioning part; 203. Limiting hole; 210. Two-shot product.

[0042] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0044] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0045] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0046] The existing engraving process usually involves setting a raised structure on the rear mold, pressing the product together with the front and rear molds, and using overpressure to press the raised structure onto the side of the product facing the rear mold (non-appearance surface) to create a pattern identical to the raised structure, thus achieving engraving. However, this method can cause the side of the product facing the front mold (appearance surface) to be subjected to overpressure, resulting in defects or damage, and reducing the yield of the product.

[0047] To address the aforementioned problems, this invention proposes a two-shot engraving device 100.

[0048] Please combine Figure 1 , Figure 2 , Figure 3 and Figure 5 The two-shot engraving device 100 of this embodiment is used to engrave and form a two-shot product 210 for a first-shot product 200. The first-shot product 200 includes a forming part 201. The two-shot engraving device 100 includes a rear mold 1, a two-shot mold 2, a front mold 3, and an ejector pin assembly 5. One end of the rear mold 1 forms a support surface 11 for supporting the first-shot product 200. A channel 12 extending to the support surface 11 is opened in the rear mold 1. The two-shot mold 2 is disposed opposite to the rear mold 1. The two-shot mold 2 can move toward the forming part 201 to surround the outer periphery of the forming part 201, or move away from the forming part 201 to disengage from the forming part 201. The front mold 3 is disposed opposite to the two-shot mold 2 and can move relative to the two-shot mold. 2. Move away from the second-shot mold 2 to separate from the rear mold 1 and the second-shot mold 2, or move towards the second-shot mold 2 to assemble with the second-shot mold 2 and the rear mold 1; when the front mold 3 is close to the second-shot mold 2 and the second-shot mold 2 is close to the molding part 201, the front mold 3, the second-shot mold 2 and the first-shot product 200 can form a second-shot cavity 4, which is used to form a second-shot product 210 on the first-shot product 200; the ejector assembly 5 is set in accordance with the channel 12, and the ejector assembly 5 can extend into the channel 12 when the front mold 3 is away from the second-shot mold 2 and the second-shot mold 2 is separated from the molding part 201, move towards the front mold 3 to eject the support surface 11, and lift the first-shot product 200 to imprint the first-shot product 200.

[0049] In the technical solution of the present invention, the first-shot product 200 is placed on the support surface 11, the second-shot mold 2 moves toward the molding part 201, and the front mold 3 moves toward the rear mold 1. The second-shot mold 2, the front mold 3, and the first-shot product 200 form a second-shot cavity 4 and form the second-shot product 210. At this time, the front mold 3 moves away from the rear mold 1, and the second-shot mold 2 moves away from the molding part 201, so that the space in the direction of the first-shot product 200 toward the front mold 3 is freed up, and the side of the first-shot product 200 facing the front mold 3 is no longer under pressure. At this time, the ejector pin assembly 5 moves along the channel 12 toward the front mold 3 to eject the first-shot product 200. The weight of the first-shot product 200 and the structure of the ejector pin assembly 5 are used to carve a slight engraving on the side of the first-shot product 200 facing the rear mold 1, thereby realizing the differentiation of the first-shot product 200. The present invention allows space to be provided for the outer surface of the first-shot product 200 by the cooperation of the front mold 3 and the second-shot mold 2, so that the outer surface of the first-shot product 200 is not pressured. Then, the non-outer surface of the first-shot product 200 is engraved by the ejector pin assembly 5, which avoids the outer surface of the first-shot product 200 being damaged by pressure and thus improves the yield of the first-shot product 200.

[0050] Please combine Figures 3 to 5 In one embodiment, the first-shot product 200 further includes a positioning part 202 disposed at an angle to the molding part 201. The positioning part 202 extends from one side edge of the molding part 201. The channel 12 is disposed at the end of the positioning part 202 away from the molding part 201. The second-shot mold 2 is disposed on the first-shot product 200, and a mating surface 24 parallel to the positioning part 202 is formed at the location corresponding to the positioning part 202. The mating surface 24 is spaced apart from the positioning part 202 when the second-shot mold 2 surrounds the outer periphery of the molding part 201.

[0051] The channel 12 is positioned at the end of the positioning part 202 furthest from the molding part 201, allowing the ejector assembly 5 to avoid the critical structures of the positioning part 202 and the molding part 201 when ejecting the first shot of product 200, thus preventing damage to the molding part 201. Furthermore, because the mating surface 24 maintains a gap with the positioning part 202, it will not compress the positioning part 202 during the second shot molding process, thereby preventing deformation or damage to the side of the positioning part 202 facing the front mold 3 due to pressure. This ensures the integrity and reliability of the positioning part 202, and also improves the stability of the second shot molding and the consistency of the product.

[0052] In one embodiment, the ejector assembly 5 includes a drive member (not shown) and an ejector pin 51 connected to the drive member. At least a portion of the ejector pin 51 passes through the channel 12. The drive member is located outside the channel 12. The drive member is used to drive the ejector pin 51 to move toward the front mold 3 to eject the support surface 11 and lift the first-shot product 200 to imprint the first-shot product 200 when the front mold 3 is away from the second-shot mold 2 and the second-shot mold 2 is disengaged from the molding part 201. The drive member is also used to drive the ejector pin 51 to move away from the front mold 3 to retract the channel 12 when the front mold 3 is close to the second-shot mold 2 and / or the second-shot mold 2 surrounds the outer periphery of the molding part 201.

[0053] Understandably, only when the front mold 3 is far from the rear mold 1 and the second-shot mold 2 is disengaged from the molding part 201, and the space of the first-shot product 200 facing the front mold 3 is completely cleared, can the driving component drive the ejector pin 51 to move towards the front mold 3 to eject the first-shot product 200. At this time, the side of the first-shot product 200 facing the front mold 3 (the appearance surface) is not compressed. Therefore, whether the front mold 3 is close to the rear mold 1 and the second-shot mold 2 is surrounding the outer periphery of the molding part 201, or whether the front mold 3 is close to the rear mold 1 and the second-shot mold 2 is surrounding the outer periphery of the molding part 201, the ejector pin 51 retracts into the channel 12. Specifically, the driving component can be a conventional motor or a device with axial extension capability in the prior art, and there are no restrictions here.

[0054] The driving component is located outside the channel 12, which does not occupy the limited space of the channel 12 and helps to maintain the structural strength and stability of the channel 12. At the same time, the ejector pin 51 only extends into the channel 12, which can eject the product 200 when needed and retract into the channel 12 when not in operation, reducing interference to the product 200 and avoiding damage to the product 200 caused by the ejector pin 51.

[0055] In one embodiment, the end face of the ejector pin 51 facing the molding part 201 is arranged parallel to the molding part 201, and is provided with a protrusion 52 protruding towards the molding part 201. There are multiple protrusions 52, and the multiple protrusions 52 are arranged at intervals to form a preset pattern.

[0056] The end face of the ejector pin 51 facing the molding section 201 is arranged parallel to the molding section 201. When ejecting a shot product 200, the ejector pin 51 contacts the force-bearing surface of the shot product 200 in parallel, ensuring uniform force and avoiding deviation or damage to the shot product 200 due to uneven force. The different numbers, arrangements, and spacing of the protrusions 52 can distinguish the shot products 200 on different molds. Therefore, by setting protrusions 52 with different preset patterns on different molds, the distinction between different molds can be achieved.

[0057] In one embodiment, the ejector pin 51 is detachably connected to the drive unit.

[0058] The ejector pin 51 is detachably connected to the drive unit, which makes it easy to replace ejector pins 51 with different shapes or patterns under different production needs, and realize flexible adjustment of the engraving content; at the same time, when the ejector pin 51 is worn or damaged, the ejector pin 51 can be replaced separately without replacing the entire drive assembly, thereby reducing maintenance costs and increasing the service life of the equipment.

[0059] In one embodiment, the two-shot mold 2 includes a first sub-mold 21 and a second sub-mold 22. A mating surface 24 is disposed on the first sub-mold 21. The first sub-mold 21 and the second sub-mold 22 together form a molding hole 23 that can surround the outer periphery of the molding part 201. The hole wall of the molding hole 23, the front mold 3, and the first-shot product 200 can surround a two-shot cavity 4 to form a two-shot product 210 on the outer periphery of the molding part 201. The first sub-mold 21 and the second sub-mold 22 can move towards each other to splice together to form the two-shot mold 2 and make the molding hole 23 surround the outer periphery of the molding part 201, or move away from each other to separate the two-shot mold 2.

[0060] By setting the two-shot mold 2 as a split structure, the first-shot product 200 can be placed into the molding area before the second-shot molding. Then, the first sub-mold 21 and the second sub-mold 22 surround the molding hole 23, ensuring that the first-shot product 200 can be stably positioned and avoiding the displacement of the first-shot product 200 when the two-shot mold 2 is engaged with the molding part 201, thus improving the convenience of operation and the accuracy of molding. The molding hole 23 provides a precise molding interface, which, together with the front mold 3 and the first-shot product 200, defines the two-shot cavity 4, allowing the second-shot product 210 to be uniformly molded around the outer periphery of the first-shot product 200, ensuring the structural stability and appearance consistency of the second-shot product 210.

[0061] In one embodiment, the support surface 11 protrudes towards the front mold 3 to form a limiting block 13. A through limiting hole 203 is provided on the injection product 200. When the injection product 200 is supported on the support surface 11, the limiting block 13 and the limiting hole 203 are inserted and engaged to limit the injection product 200.

[0062] By setting a limiting block 13 on the support surface 11 and opening a limiting hole 203 on the first-shot product 200, the two can be inserted and fitted when the first-shot product 200 is placed. This design can reliably limit the first-shot product 200, preventing it from shifting during the engraving and second-shot molding processes, thereby ensuring the positioning accuracy and molding quality of the product and improving the yield of the first-shot product 200 and the second-shot product 210.

[0063] Please combine Figure 1 , Figure 2 and Figure 6 The present invention also provides a two-color etching method, applied to the two-color etching apparatus 100 described above, the two-color etching method comprising the following steps:

[0064] S100: Forms a two-shot cavity by including the two-shot mold, the front mold, and the first-shot product.

[0065] By driving the second-shot mold 2 and the front mold 3 to move, the second-shot mold 2, the front mold 3 and the first-shot product 200 are spliced ​​together and enclosed to form the second-shot cavity 4;

[0066] S200: Forming a two-shot product within the two-shot cavity;

[0067] The two-shot product 210 is formed in the two-shot cavity 4 by injection molding;

[0068] S300: Separates the second-shot mold and front mold from the first-shot product;

[0069] Drive the second injection mold 2 to detach from the molding part 201 and the rear mold 1, and drive the front mold 3 to detach from the first injection product 200 and the rear mold 1;

[0070] S400: The ejector pin assembly pushes out of the support surface of the front mold and lifts up the injection product to mark the injection product.

[0071] In the technical solution of the present invention, the first-shot product 200 is placed on the support surface 11, the second-shot mold 2 moves toward the molding part 201, and the front mold 3 moves toward the rear mold 1. The second-shot mold 2, the front mold 3, and the first-shot product 200 form a second-shot cavity 4 and form the second-shot product 210. At this time, the front mold 3 moves away from the rear mold 1, and the second-shot mold 2 moves away from the molding part 201, so that the space in the direction of the first-shot product 200 toward the front mold 3 is freed up, and the side of the first-shot product 200 facing the front mold 3 is no longer under pressure. At this time, the ejector pin assembly 5 moves along the channel 12 toward the front mold 3 to eject the first-shot product 200. The weight of the first-shot product 200 and the structure of the ejector pin assembly 5 are used to carve a slight engraving on the side of the first-shot product 200 facing the rear mold 1, thereby realizing the differentiation of the first-shot product 200. The present invention allows space to be provided for the outer surface of the first-shot product 200 by the cooperation of the front mold 3 and the second-shot mold 2, so that the outer surface of the first-shot product 200 is not pressured. Then, the non-outer surface of the first-shot product 200 is engraved by the ejector pin assembly 5, which avoids the outer surface of the first-shot product 200 being damaged by pressure and thus improves the yield of the first-shot product 200.

[0072] Please see Figure 7 In one embodiment, the first-shot product 200 further includes a positioning part 202 that is set at an angle to the molding part 201, and the second-shot mold 2 includes a first sub-mold 21 and a second sub-mold 22, which together form a molding hole 23 that can surround the outer periphery of the molding part 201.

[0073] Step S100 includes:

[0074] S110: Move the first sub-mold and the second sub-mold toward each other to splice them together to form a two-shot mold, so that the molding hole surrounds the outer periphery of the molding part;

[0075] The first sub-mold 21 and the second sub-mold 22 are flush with the molding part 201, so that the first sub-mold 21 and the second sub-mold 22 move towards each other and splice together to form a molding hole 23, which surrounds the outer periphery of the molding part 201.

[0076] S120: The front mold moves toward the direction of the second injection mold so that the hole wall of the molding hole, the front mold and the first injection product form the second injection cavity.

[0077] The front mold 3 moves toward the second injection mold 2 and joins with the second injection mold 2, so that the first injection product 200, the hole wall of the forming hole 23 and the front mold 3 join together to form a closed second injection cavity 4.

[0078] Please see Figure 8 In one embodiment, step S300 includes:

[0079] S310: Move the front mold away from the second injection mold to separate the front mold from the second injection mold and the first injection product;

[0080] S320: Move the first and second sub-molds away from each other until the positioning part is misaligned with the first sub-mold and the second sub-mold is misaligned with the molding part, so as to separate the two-shot molds and detach the two-shot molds from the first-shot product.

[0081] The first sub-mold 21 is moved to be misaligned with the positioning part 202, and the second sub-mold 22 is moved to be misaligned with the molding part 201, so that the first sub-mold 21 and the second sub-mold 22 will not interfere with the product 200 during the process of the product being ejected, thereby improving the stability of the product 200 ejection process and preventing the side of the product 200 facing the front mold 3 from being squeezed and damaged.

[0082] The above are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made under the concept of the present invention using the contents of the specification and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A binary lithographic apparatus, characterized in that, A two-shot product is formed on a one-shot product, the one-shot product comprises a forming part, the two-shot marking device comprises: a back mold, one end of the back mold forms a support surface for supporting the one-shot product, a channel is formed in the back mold and extends to the support surface; a two-shot mold, the two-shot mold is arranged opposite to the back mold, the two-shot mold can move towards the forming part to surround the periphery of the forming part, or move away from the forming part to separate from the forming part; a front mold, the front mold is arranged opposite to the two-shot mold and can move away from the two-shot mold to separate from the two-shot mold, or move towards the two-shot mold to combine with the two-shot mold; when the front mold is close to the two-shot mold and the two-shot mold is close to the forming part, the front mold, the two-shot mold and the one-shot product can form a two-shot cavity, the two-shot cavity is used to form the two-shot product on the one-shot product; a ejector pin assembly, the ejector pin assembly is arranged corresponding to the channel, and the ejector pin assembly can extend into the channel when the front mold is away from the two-shot mold and the two-shot mold is separated from the forming part, move towards the front mold to eject the support surface, and lift the one-shot product to mark the one-shot product.

2. The marking apparatus of claim 1, wherein The one-shot product further comprises a positioning part arranged at an angle with the forming part, the positioning part is formed from a side edge of the forming part, the channel is arranged corresponding to an end of the positioning part away from the forming part, the two-shot mold covers the one-shot product, and a matching surface parallel to the positioning part is formed corresponding to the positioning part, the matching surface is arranged spaced apart from the positioning part when the two-shot mold surrounds the periphery of the forming part.

3. The marking apparatus of claim 2, wherein, The ejector pin assembly comprises a driving member and an ejector pin connected with the driving member, at least part of the ejector pin extends into the channel, the driving member is located outside the channel, and the driving member is used to drive the ejector pin to move towards the front mold to eject the support surface and lift the one-shot product to mark the one-shot product when the front mold is away from the two-shot mold and the two-shot mold is separated from the forming part; The driving member is also used to drive the ejector pin to move away from the front mold to retract the channel when the front mold is close to the two-shot mold and / or the two-shot mold surrounds the periphery of the forming part.

4. The marking apparatus of claim 3, wherein An end surface of the ejector pin towards the forming part is arranged parallel to the forming part, and a protrusion protruding towards the forming part is arranged, the number of the protrusions is multiple, and the multiple protrusions are arranged spaced apart and form a preset pattern.

5. The marking apparatus of claim 4, wherein, The ejector pin is detachably connected with the driving member.

6. The marking apparatus of claim 2, wherein, The two-shot mold comprises a first sub-mold and a second sub-mold, the matching surface is arranged on the first sub-mold, the first sub-mold and the second sub-mold combine to form a forming hole capable of surrounding the periphery of the forming part, and the hole wall of the forming hole, the front mold and the one-shot product can form the two-shot cavity to form the two-shot product on the periphery of the forming part; The first sub-mold and the second sub-mold can move towards each other to splice to form the two-shot mold and make the forming hole surround the periphery of the forming part, or move away from each other to separate the two-shot mold.

7. The engraving apparatus of any one of claims 1 to 6, wherein, The support surface forms a limiting block protruding towards the front mold, and the one-shot product is provided with a through limiting hole, so that when the one-shot product is supported on the support surface, the limiting block and the limiting hole are inserted and matched to limit the one-shot product.

8. A method of bichromatic lithography, characterized by, The two-shot marking method is applied to the two-shot marking equipment according to any one of claims 1 to 7, and the two-shot marking method comprises the following steps: The two-shot mold, the front mold and the one-shot product form the two-shot cavity; A two-shot product is formed in the two-shot cavity; The two-shot mold and the front mold are separated from the one-shot product; The ejector assembly ejects the support surface towards the front mold and lifts the one-shot product to mark the one-shot product.

9. The method of claim 8, wherein the step of applying the ink comprises applying the ink to the surface of the substrate in a pattern. The one-shot product further comprises a positioning part arranged at an angle with the forming part, and the two-shot mold comprises a first sub-mold and a second sub-mold, and the first sub-mold and the second sub-mold form a forming hole which can surround the periphery of the forming part; The step of making the two-shot mold, the front mold and the one-shot product form the two-shot cavity comprises: The first sub-mold and the second sub-mold move towards each other to splice to form the two-shot mold, so that the forming hole surrounds the periphery of the forming part; The front mold moves towards the direction of the two-shot mold, so that the hole wall of the forming hole, the front mold and the one-shot product form the two-shot cavity.

10. The method of claim 9, wherein the step of applying the ink comprises applying the ink to the surface of the substrate in a pattern. The step of separating the two-shot mold and the front mold from the one-shot product comprises: The front mold moves away from the direction of the two-shot mold to separate the front mold from the two-shot mold and the one-shot product; The first sub-mold and the second sub-mold move away from each other to misalign the positioning part with the first sub-mold and misalign the second sub-mold with the forming part, so as to separate the two-shot mold and separate the two-shot mold from the one-shot product.

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