Carrier plate assembly and mold

Abstract

The carrying disc assembly comprises a plurality of carrying disc sets, each carrying disc set comprises a plurality of carrying discs, the carrying discs are provided with fool-proof parts, when the multiple carrying discs of the same carrying disc set are stacked, the fool-proof parts of every two adjacent carrying discs can be matched with each other, and when the multiple carrying discs of different carrying disc sets are stacked, the fool-proof parts of every two adjacent carrying discs can be matched with each other. And the fool-proof parts of any two carrying discs are not matched with each other. According to the invention, the structure of the carrying disc for carrying the electronic components can be optimized.

Description

Technical Field

[0001] This application relates to the field of semiconductor technology, and in particular to a carrier disk assembly and mold. Background Technology

[0002] During the manufacturing process of display panels, related electronic components are placed in carrier trays, and multiple carrier trays are stacked to save space. However, the current structure of the carrier trays needs to be optimized. Summary of the Invention

[0003] This application provides a carrier disk assembly and mold for optimizing the structure of a carrier disk used to support electronic components.

[0004] According to one aspect of this application, a tray assembly is provided, including multiple tray groups, each tray group including multiple trays, the trays being provided with a foolproof part, wherein when multiple trays of the same tray group are stacked, the foolproof parts of two adjacent trays can match each other, and when multiple trays of different tray groups are stacked, the foolproof parts of any two trays do not match each other.

[0005] In some embodiments, the carrier tray has a bearing side and a supporting side opposite each other along the thickness direction, and the error prevention part includes a first error prevention part disposed on the bearing side and a second error prevention part disposed on the supporting side; when multiple carrier trays of the same carrier tray group are stacked, the first error prevention part of one carrier tray and the second error prevention part of an adjacent carrier tray are matched with each other; when multiple carrier trays of different carrier tray groups are stacked, the first error prevention part of one carrier tray and the second error prevention part of an adjacent carrier tray are not matched with each other.

[0006] In some embodiments, one of the first and second foolproof parts includes a groove, and the other includes a boss that can mate with the groove.

[0007] In some embodiments, the boss and the groove have the same shape and are matched in size.

[0008] In some embodiments, the groove has a groove wall opposite to the side of the boss, and the distance between the side of the boss and the corresponding groove wall of the groove is 0.2mm ± 0.05mm.

[0009] In some embodiments, when multiple trays of the same tray group are stacked, the center line connecting the trays is parallel to the center line connecting the error-proof part of each tray; when multiple trays of different tray groups are stacked, the center line connecting the trays is not parallel to the center line connecting the error-proof part of each tray.

[0010] In some embodiments, when multiple trays from different tray groups are stacked, the center of the anti-mistake part of a tray in one tray group and the center of the anti-mistake part of a tray in another tray group are spaced 3 mm ± 0.2 mm apart in a first direction, which intersects the thickness direction of the tray.

[0011] In some embodiments, the plurality of tray groups include a first tray group, a second tray group, a third tray group, and a fourth tray group. The first tray group includes a plurality of first trays, the second tray group includes a plurality of second trays, the third tray group includes a plurality of third trays, and the fourth tray group includes a plurality of fourth trays. The distance D1 between the center of the error-proof part of the first tray and the center of the first tray in a first direction, the distance D2 between the center of the error-proof part of the second tray and the center of the second tray in a first direction, the distance D3 between the center of the error-proof part of the third tray and the center of the third tray in a first direction, and the distance D4 between the center of the error-proof part of the fourth tray and the center of the fourth tray in a first direction satisfy the conditions: D2-D1=3mm±0.2mm, D3-D2=3mm±0.2mm, D4-D3=3mm±0.2mm.

[0012] In some embodiments, the shape of the foolproof feature in one of the two different tray groups is different from the shape of the foolproof feature in the other tray group.

[0013] According to another aspect of this application, a mold is provided, comprising a plurality of tray cavities, each tray cavity having a foolproof zone, the foolproof zones of the plurality of tray cavities being different.

[0014] The tray assembly of this application includes multiple tray groups, each tray group including multiple trays. Each tray is equipped with a foolproof feature. When multiple trays from the same group are stacked, the foolproof features of adjacent trays match. When multiple trays from different groups are stacked, the foolproof features of any two trays do not match. Therefore, when multiple trays are encountered, the group of each tray can be determined based on whether the foolproof features of each tray match (e.g., shape, size, position). This allows for the rapid and stable stacking of trays from the same group and the separation of trays from different groups. This improves the flatness of the stacked trays. Consequently, in stacked trays, a high degree of flatness can be maintained between adjacent trays without the need for additional structures, reducing operator workload, improving production efficiency, and allowing for more stable placement of loads such as electronic components on each tray, while avoiding the risk of damage to electronic components that might result from additional structures between adjacent trays. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application 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 this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A schematic diagram of multiple disks in the same disk group is shown in one embodiment of this application.

[0017] Figure 2 A schematic diagram of multiple disks in different disk groups is shown in one embodiment of this application.

[0018] Figure 3a and Figure 3b Schematic diagrams of opposite sides of the carrier disk along the thickness direction in one embodiment of this application are shown.

[0019] Figure 4 A partial detail view of the carrier disk in one embodiment of this application is shown.

[0020] Figure 5 and Figure 6 Schematic diagrams of the carrier disks in two different embodiments of this application are shown.

[0021] Figure 7 A schematic diagram of multiple disks in different disk groups is shown in one embodiment of this application.

[0022] Explanation of reference numerals in the attached figures: 1. Carrier tray assembly; 10. Carrier tray; 10a. First carrier tray; 10b. Second carrier tray; 10c. Third carrier tray; 10d. Fourth carrier tray; 11. Foolproof part; 11a. First foolproof part; 11b. Second foolproof part; 11c. Groove; 11d. Boss; X. First direction. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0024] In the following description, when referring to the accompanying drawings, the same numbers in different drawings denote the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0025] During the manufacturing process of display panels, electronic components such as chips or semiconductor packages (e.g., Chip On Glass, COG) are stored in carrier trays, and multiple carrier trays are stacked to facilitate transportation and save space.

[0026] Carrier trays are typically molded using a single mold with multiple cavities, allowing for the production of multiple trays of the same model at once. Due to inherent, unavoidable dimensional errors between different cavities, the trays formed from these cavities also exhibit corresponding dimensional variations. This results in reduced flatness when multiple trays of the same model but from different cavities are stacked. Therefore, to protect the electronic components placed underneath, Tefal paper is placed between adjacent trays.

[0027] When electronic components stored in the lower tray need to be used, the upper tray stacked on top of the lower tray must first be removed, and then the Tefal paper covering the lower tray must be removed to expose the electronic components. This increases the number of manual operations required and reduces production efficiency. Furthermore, improper removal of the Tefal paper can cause the electronic components to jump off the lower tray, resulting in damage.

[0028] To address the aforementioned issues, this application provides a tray assembly comprising multiple tray groups, each tray group containing multiple trays. By implementing a foolproof design for the trays in different groups, operators can easily and quickly stack trays from the same group and separate trays from different groups. Since the stacked trays originate from the same tray group—for example, trays from the same group can be formed using the same cavity of the same mold, while trays from different groups can be formed using multiple cavities of the same mold, or vice versa—significant differences in structure and size exist between trays from different groups. This reduces dimensional errors between trays from the same group, resulting in higher structural and dimensional consistency among the stacked trays, thereby improving the flatness of the stacked trays. Consequently, adjacent trays in the stack do not require the placement of Tefal paper to maintain high flatness, reducing operator intervention, increasing production efficiency, and avoiding potential damage to electronic components during the removal of Tefal paper.

[0029] See Figure 1 and Figure 2In some embodiments, the tray assembly includes multiple tray groups 1, such as two, three, four, or more tray groups 1. Each tray group 1 includes multiple trays 10, such as two, three, four, or more trays 10. The material of the trays 10 includes, for example, plastic. Optionally, the trays 10 are provided with one or more receiving slots for accommodating electronic components, so that the electronic components can be stored more stably. Optionally, the receiving slots of each tray 10 in the multiple tray groups 1 have the same shape, size, and number, which simplifies the mold structure and reduces production costs.

[0030] The carrier tray 10 is provided with a foolproof feature 11. When multiple carrier trays 10 of the same carrier tray group 1 are stacked, the foolproof features 11 of adjacent carrier trays 10 can match each other. Optionally, the matching of two foolproof features 11 includes at least one of the following: the two foolproof features 11 are positioned correspondingly in a preset direction, the two foolproof features 11 are equal in size, and the two foolproof features 11 are the same in shape. When multiple carrier trays 10 of different carrier tray groups 1 are stacked, the foolproof features 11 of any two carrier trays 10 do not match each other. Optionally, the mismatch of foolproof features 11 between different carrier tray groups 1 includes at least one of the following: shape mismatch, size mismatch, and position mismatch.

[0031] Based on this, when encountering multiple carrier trays 10, the group of each carrier tray 10 can be determined by whether the error-proofing parts 11 of each carrier tray 10 match, such as whether their shape, size, and position match. This allows for the rapid and stable stacking of carrier trays 10 from the same group and the separation of carrier trays 10 from different groups. As a result, the structure and dimensions of the stacked carrier trays 10 are more consistent, thus improving the flatness of the stacked carrier trays 10. Consequently, a high degree of flatness can be maintained between adjacent carrier trays 10 without the need for Tefal paper, reducing operator intervention, increasing production efficiency, and avoiding potential damage to electronic components during the removal of Tefal paper.

[0032] Optionally, when multiple carrier trays 10 of the same carrier tray group 1 are stacked, the difference between the highest and lowest points of the surface of the carrier tray 10 is <0.1mm. For example, the difference between the highest and lowest points of the surface of the carrier tray 10 is 0.01mm, 0.05mm or 0.07mm, so as to ensure that each stacked carrier tray 10 can maintain a high degree of flatness even when no structure such as Tefal paper is placed between the upper carrier tray 10 and the lower carrier tray 10.

[0033] Combined Figure 3a and Figure 3bIn some embodiments, the carrier tray 10 has a carrier side and a support side opposite to each other along the thickness direction. Exemplarily, the carrier side is provided with a receiving groove for accommodating electronic components, and when multiple carrier trays 10 are stacked, the receiving groove of the lower carrier tray 10 faces the surface of the support side of the upper carrier tray 10. The foolproof part 11 includes a first foolproof part 11a provided on the carrier side and a second foolproof part 11b provided on the support side. Optionally, the number of first foolproof parts 11a is one or more, and the number of second foolproof parts 11b corresponds to the number of first foolproof parts 11a. When multiple carrier trays 10 of the same carrier tray group 1 are stacked, the first foolproof part 11a of one carrier tray 10 and the second foolproof part 11b of an adjacent carrier tray 10 match each other. When multiple carrier trays 10 of different carrier tray groups 1 are stacked, the first foolproof part 11a of one carrier tray 10 and the second foolproof part 11b of an adjacent carrier tray 10 do not match each other. In this way, operators can quickly determine the group of each tray 10, thereby quickly and smoothly stacking trays 10 of the same group and placing trays 10 of different groups separately.

[0034] Optionally, the first anti-mistake part 11a of one tray 10 and the second anti-mistake part 11b of an adjacent tray 10 can be designed to be different in one or more of the shape, size, or position of the related first anti-mistake part 11a and the second anti-mistake part 11b when multiple trays 10 of different tray groups 1 are stacked, so that the first anti-mistake part 11a of one tray 10 and the second anti-mistake part 11b of the adjacent tray 10 are not matched.

[0035] For example, among the multiple trays 10 in the same tray group 1, the first error-proofing part 11a and the second error-proofing part 11b of the same tray 10 have the same shape, and the first error-proofing part 11a of one tray 10 and the second error-proofing part 11b of another tray 10 have the same shape. Among the multiple trays 10 in different tray groups 1, the first error-proofing part 11a and the second error-proofing part 11b of the same tray 10 have the same shape, and the first error-proofing part 11a of one tray 10 and the second error-proofing part 11b of another tray 10 have different shapes. In this way, the group of each tray 10 can be quickly determined by the difference in shape, reducing the determination time and the risk of determination error.

[0036] For example, the first error-proofing portion 11a and the second error-proofing portion 11b of each tray 10 in the same tray group 1 have the same shape, and the first error-proofing portion 11a and the second error-proofing portion 11b of each tray 10 in different tray groups 1 have the same shape. Furthermore, among the multiple trays 10 in the same tray group 1, the dimensions of the first error-proofing portion 11a and the second error-proofing portion 11b of the same tray 10 are equal, and the dimensions of the first error-proofing portion 11a of one tray 10 and the second error-proofing portion 11b of another tray 10 are equal. Among the multiple trays 10 in different tray groups 1, the dimensions of the first error-proofing portion 11a and the second error-proofing portion 11b of the same tray 10 are equal, and the dimensions of the first error-proofing portion 11a of one tray 10 and the second error-proofing portion 11b of another tray 10 are different. Thus, the group of each tray 10 can be quickly determined by its dimensions, simplifying the structure of the tray 10 and its mold, thereby reducing the manufacturing difficulty and cost of the tray 10.

[0037] For example, in the same tray group 1, the first anti-mistake part 11a and the second anti-mistake part 11b of each tray 10 have the same shape, equal size, and are positioned in the same place on each tray 10. For example, the tray 10 is constructed as a rectangle, and the anti-mistake part 11 of each tray 10 is positioned in the same place along the length of the rectangle, or the anti-mistake part 11 of each tray 10 is positioned in the same place along the width of the rectangle, or the anti-mistake part 11 of each tray 10 is positioned in the same place along both the length and width of the rectangle. In different tray groups 1, the first anti-mistake part 11a and the second anti-mistake part 11b of each tray 10 have the same shape, equal size, and are positioned differently on each tray 10. For example, the tray 10 is constructed as a rectangle, and the anti-mistake part 11 of each tray 10 is positioned differently along the length of the rectangle, or the anti-mistake part 11 of each tray 10 is positioned differently along the width of the rectangle, or the anti-mistake part 11 of each tray 10 is positioned differently along both the length and width of the rectangle. In this way, the group of each carrier 10 can be quickly determined by its position, and the structure of the carrier 10 and its mold is simplified, thereby reducing the process difficulty and cost of manufacturing the carrier 10.

[0038] Combined Figure 4 In some embodiments, one of the first anti-mistake part 11a and the second anti-mistake part 11b includes a groove 11c, and the other includes a boss 11d that can match the groove 11c. In this way, the group information of each tray can be quickly determined by whether the groove 11c matches the boss 11d. At the same time, the cooperation between the groove 11c and the boss 11d can also achieve a limiting effect when the trays 10 of the same group are stacked, so that the stacked trays 10 will not be offset, thereby reducing the risk of the stacked structure becoming skewed and thus keeping the stacked structure stable.

[0039] Optionally, the boss 11d and the recess 11c have the same shape and match in size. For example, see... Figure 5and Figure 6 The boss 11d has a shape including at least one of semi-circular, triangular, and quadrilateral shapes. The groove 11c has the same shape as the boss 11d, and the boss 11d can enter the groove 11c. That is, the size of the groove 11c is equal to or close to the size of the boss 11d, so that the boss 11d can just fit into the groove 11c. Alternatively, the boss 11d and the groove 11c can be interference-fitted, or the boss 11d has a preset range of movement space after entering the groove 11c. In this way, while ensuring a good error-proof effect, the structure of each carrier 10 is simple and easy to form.

[0040] Optionally, each tray 10 may be provided with multiple foolproof features 11. This can improve the foolproof effect.

[0041] In some embodiments, the groove 11c has a groove wall opposite to the side of the boss 11d, and the distance between the side of the boss 11d and the corresponding groove wall of the groove 11c is 0.2mm ± 0.05mm, that is, the boss 11d and the groove 11c are in clearance fit. For example, the distance between the side of the boss 11d and the corresponding groove wall of the groove 11c is 0.18mm, 0.21mm, or 0.23mm. In this way, the boss 11d can move in and out of the groove 11c more smoothly, thereby making the loading and unloading of the tray 10 more convenient and reducing the risk of the upper tray 10 being squeezed by the lower tray 10 and electronic components during the loading and unloading process.

[0042] See Figure 1 and Figure 2 In some embodiments, when multiple trays 10 of the same tray group 1 are stacked, the center line L11 of each tray 10 is parallel to the center line L12 of the error-proof part 11 of each tray 10, that is, the error-proof parts 11 of multiple trays 10 of the same tray group 1 are in the same position in a preset direction, such as the length direction of the tray 10. When multiple trays 10 of different tray groups 1 are stacked, the center line L21 of each tray 10 is not parallel to the center line L22 of the error-proof part 11 of each tray 10, for example, they intersect, that is, the error-proof parts 11 of the trays 10 of different tray groups 1 are in different positions in a preset direction, such as the length direction of the tray 10. Optionally, the angle between the center line of each tray 10 and the center line of each error-proof part 11 is 0°-30°, for example, 5°, 10° or 15°. Based on this, the group of each tray 10 can be quickly determined by the position information of the error-proof part 11.

[0043] In some embodiments, when multiple trays 10 from different tray groups 1 are stacked, the center of the anti-misalignment portion 11 of one tray group 1 and the center of the anti-misalignment portion 11 of another tray group 1 are spaced 3 mm ± 0.2 mm apart in a first direction X. The first direction X intersects the thickness direction of the tray 10; for example, the first direction X is perpendicular to the thickness direction of the tray 10 or forms an acute angle with it. Optionally, the tray 10 is constructed as a rectangle, and the center of the anti-misalignment portion 11 of one tray group 1 and the center of the anti-misalignment portion 11 of another tray group 1 are spaced 3 mm ± 0.2 mm apart in the extension direction of one side of the rectangle. In this way, the anti-misalignment portions 11 of the trays 10 from different tray groups 1 are staggered, while the anti-misalignment portions 11 of the trays 10 from the same tray group 1 are aligned, achieving the purpose of preventing trays 10 from being confused and stacked. For example, when the anti-foolproof part 11 is a groove 11c and a boss 11d, when the trays of different tray groups 1 are stacked one on top of the other, the boss 11d and the groove 11c cannot be aligned, making it impossible for the trays 10 of different groups to be stacked.

[0044] See Figure 2 and Figure 7 In an exemplary embodiment, the plurality of tray groups 1 include a first tray group, a second tray group, a third tray group, and a fourth tray group. The first tray group includes a plurality of first trays 10a, the second tray group includes a plurality of second trays 10b, the third tray group includes a plurality of third trays 10c, and the fourth tray group includes a plurality of fourth trays 10d. The distance D1 between the center of the anti-mistake part 11 of the first tray 10a and the center of the first tray 10a in the first direction X, the distance D2 between the center of the anti-mistake part 11 of the second tray 10b and the center of the second tray 10b in the first direction X, the distance D3 between the center of the anti-mistake part 11 of the third tray 10c and the center of the third tray 10c in the first direction X, and the distance D4 between the center of the anti-mistake part 11 of the fourth tray 10d and the center of the fourth tray 10d in the first direction X satisfy the following conditions: D2-D1=3mm±0.2mm, D3-D2=3mm±0.2mm, D4-D3=3mm±0.2mm. In this way, the anti-foolproof parts 11 of the carrier trays 10 in different carrier tray groups 1 are staggered, so that the carrier trays 10 in different groups are not easily confused and stacked.

[0045] In some embodiments, the shape of the foolproof part 11 in one of the two different tray groups 1 is different from that in the other tray group 1. In this way, the group to which each tray 10 belongs can be quickly determined by the shape of the foolproof part 11, thereby reducing the risk of trays 10 from different tray groups 1 being confused and stacked, which would affect the flatness of the stacked trays 10.

[0046] Based on the same inventive concept, this application also provides a mold including multiple tray cavities, each tray cavity having a foolproof anti-mistake area. The foolproof anti-mistake areas of the multiple tray cavities are different, and these areas are used to form foolproof features. For example, the foolproof anti-mistake areas of the multiple tray cavities may have different shapes, sizes, and / or positions. Based on this, one mold can form multiple trays at a time, improving production efficiency. The number of trays formed at one time is equal to the number of tray cavities, and the specific number can be adjusted according to design requirements. Furthermore, multiple trays from different tray cavities have different foolproof features, while multiple trays from the same tray cavity have the same foolproof features, thereby facilitating operators to quickly and smoothly stack trays of the same group and separate trays of different groups.

[0047] Optionally, multiple carrier cavity cavities are arranged in a row along a first direction, or in a column along a second direction, or in a row along the first direction and in a column along the second direction, wherein the first and second directions intersect, for example, perpendicularly or at an acute angle. In this way, the multiple carrier cavity cavities can be arranged closely, saving space and thus reducing costs.

[0048] In the description of this application, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, in the description of this application, unless otherwise stated, "multiple" means at least two, for example, two, three, four, etc. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship.

[0049] The above-disclosed embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of this application. Therefore, any equivalent variations made in accordance with the claims of this application shall still fall within the scope of this application.

Claims

1. A carrier disk assembly, characterized by The plurality of carrier disc groups each include a plurality of carrier discs, and the carrier discs are provided with fool-proof parts, the fool-proof parts of adjacent two carrier discs in the same carrier disc group can match each other when the plurality of carrier discs in the same carrier disc group are stacked, and the fool-proof parts of any two carrier discs in different carrier disc groups do not match each other when the plurality of carrier discs in different carrier disc groups are stacked.

2. The carrier assembly of claim 1, wherein, The carrier disc has a bearing side and a supporting side opposite in the thickness direction, and the fool-proof part includes a first fool-proof part arranged on the bearing side and a second fool-proof part arranged on the supporting side. The first fool-proof part of one carrier disc and the second fool-proof part of an adjacent carrier disc in the same carrier disc group match each other when the plurality of carrier discs in the same carrier disc group are stacked. The first fool-proof part of one carrier disc and the second fool-proof part of an adjacent carrier disc in different carrier disc groups do not match each other when the plurality of carrier discs in different carrier disc groups are stacked.

3. The carrier plate assembly of claim 2, wherein, One of the first fool-proof part and the second fool-proof part includes a groove, and the other includes a boss capable of matching the groove.

4. The carrier plate assembly of claim 3, wherein, The boss and the groove have the same shape and matching size.

5. The carrier plate assembly of claim 4, wherein, The groove has groove walls opposite to the side surface of the boss, and the distance between the side surface of the boss and the corresponding groove wall of the groove is 0.2 mm±0.05 mm.

6. The carrier assembly of claim 1, wherein, The center lines of the carrier discs are parallel to the center lines of the fool-proof parts of the carrier discs in the same carrier disc group when the plurality of carrier discs in the same carrier disc group are stacked. The center lines of the carrier discs are not parallel to the center lines of the fool-proof parts of the carrier discs in different carrier disc groups when the plurality of carrier discs in different carrier disc groups are stacked.

7. The carrier plate assembly of claim 6, wherein, The centers of the fool-proof parts of the carrier discs in one carrier disc group and the centers of the fool-proof parts of the carrier discs in another carrier disc group are spaced apart by 3 mm±0.2 mm in a first direction intersecting the thickness direction of the carrier disc when the plurality of carrier discs in different carrier disc groups are stacked.

8. The carrier plate assembly of claim 7, wherein, The plurality of carrier disc groups include a first carrier disc group, a second carrier disc group, a third carrier disc group, and a fourth carrier disc group, the first carrier disc group includes a plurality of first carrier discs, the second carrier disc group includes a plurality of second carrier discs, the third carrier disc group includes a plurality of third carrier discs, and the fourth carrier disc group includes a plurality of fourth carrier discs. The distance D1 between the center of the first carrier disc and the center of the fool-proof part of the first carrier disc, the distance D2 between the center of the second carrier disc and the center of the fool-proof part of the second carrier disc, the distance D3 between the center of the third carrier disc and the center of the fool-proof part of the third carrier disc, and the distance D4 between the center of the fourth carrier disc and the center of the fool-proof part of the fourth carrier disc satisfy the condition: D2-D1=3 mm±0.2 mm, D3-D2=3 mm±0.2 mm, and D4-D3=3 mm±0.2 mm.

9. The carrier plate assembly of claim 1, wherein, The shape of the fool-proof part of one carrier disc group is different from the shape of the fool-proof part of another carrier disc group in different two carrier disc groups.

10. A mold characterized in that, The plurality of carrier disc holes are provided with fool-proof areas, and the fool-proof areas of the plurality of carrier disc holes are different.

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