Gate design method for bi-color products suitable for internal aluminum plating

Abstract

The application discloses a gate design method suitable for a double-color product with an inner surface plated with aluminum. A Z-shaped stopper at the bottom of a first color piece comprises a first upper horizontal edge, a first vertical edge and a first lower horizontal edge, and the first upper horizontal edge and the first vertical edge form a first right angle. A Z-shaped stopper at the top of a second color piece comprises a second upper horizontal edge, a second vertical edge and a second lower horizontal edge, and the second upper horizontal edge and the second vertical edge form a second right angle. A second color piece and a second color piece barrier wall are injection molded. The second color piece barrier wall is located at the second right angle of the second color piece. A first color piece is injection molded by using an improved latent edge gate. The gate axis is parallel to the first upper horizontal edge, the gate side wall is in contact with the first upper horizontal edge, and the gate front end is not in contact with the first vertical edge. The molten plastic in the gate is filled upward under the action of the second color piece barrier wall, and the first color piece is injection molded on the second color piece. The method improves the performance of the gate, and guarantees the appearance and performance of the product.

Description

Technical Field

[0001] This invention relates to the technical field of mold gates, and in particular to a gate design method suitable for two-color products with aluminum-plated inner surfaces. Background Technology

[0002] As automotive lighting products become more diverse and complex, injection mold structures are also becoming increasingly complex. Achieving successful product molding while minimizing defects presents a significant technical challenge, particularly regarding the gate design.

[0003] Automotive decorative light plates are one type of automotive lighting product. Due to the special structure of automotive decorative light plates, traditional gate methods, such as point gates, rib point gates, and ordinary edge gates, cannot meet the product's appearance performance requirements, and the pass rate cannot be fully guaranteed, resulting in low production efficiency.

[0004] Currently, the gates used for injection-molded two-color products with aluminum plating on the inner surface generally have the following defects: 1. Conventional rib-position gates: This can lead to cold material appearing at the gate of the injection-molded product. See the appendix for details. Figure 1 ;

[0005] II. Conventional Side Gate: The gate is located on the outer surface of the injection molded product, affecting its appearance and aesthetics. See Appendix for details. Figure 2 ;

[0006] III. Conventional Latent Edge Gate: A reflection phenomenon appears on the aluminized inner surface of the injection molded product. See Appendix for details. Figure 3 . Summary of the Invention

[0007] The present invention aims to solve at least one of the technical problems existing in the prior art.

[0008] Therefore, this invention proposes a gate design method suitable for two-color products with aluminum plating on the inner surface, which improves the gate performance and ensures the product's appearance and performance.

[0009] A gate design method for two-color products with aluminum plating on the inner surface according to an embodiment of the present invention includes the following steps:

[0010] Step 1: Analyze the structure of the two-color product with aluminum plating on the inner surface, including a first color sheet located at the top and a second color sheet located at the bottom. The bottom of the first color sheet and the top of the second color sheet are spliced ​​together by a Z-shaped stop.

[0011] The Z-shaped stop at the bottom of the first color chip includes a first upper horizontal edge, a first vertical edge, and a first lower horizontal edge, with the first upper horizontal edge and the first vertical edge forming a first right angle.

[0012] The Z-shaped stop at the top of the second color chip includes a second upper horizontal edge, a second vertical edge, and a second lower horizontal edge, with the second upper horizontal edge and the second vertical edge forming a second right angle.

[0013] Step 2: Injection mold the second color sheet and the second color sheet barrier. The second color sheet barrier is located at the second right angle of the second color sheet, and the width of the second color sheet barrier is d1.

[0014] Step 3: Inject the first color sheet using an improved submerged side gate. The axis of the improved submerged side gate is parallel to the first upper transverse side, the sidewall of the improved submerged side gate is in contact with the first upper transverse side, the front end of the improved submerged side gate is not in contact with the first vertical side, and the gap between the front end of the improved submerged side gate and the first vertical side is d2, where d2 = d1. The molten plastic in the improved submerged side gate is blocked by the second color sheet barrier and then fills upward, finally injection molding the first color sheet onto the second color sheet.

[0015] The beneficial effects of this invention are that it significantly solves appearance quality problems such as cold material at the gate, reflection of the gate on the outer surface, and reflection on the inner surface of the aluminum plating, greatly improving the visibility of the product appearance; it can be widely applied to improve the appearance problems of two-color products with aluminum plating on the inner surface; each such mold can improve the overall quality of the mold and reduce the occurrence of cold material problems, thus improving the production qualification rate.

[0016] According to one embodiment of the present invention, the first color filter is a transparent filter and the second color filter is a black filter.

[0017] According to one embodiment of the present invention, the width of the second color plate barrier is half the width of the first upper horizontal edge.

[0018] According to one embodiment of the present invention, the inner surface of the first color piece is an aluminum-plated surface.

[0019] According to one embodiment of the present invention, the second color sheet and the second color sheet retaining wall are injection molded from the same gate.

[0020] According to one embodiment of the present invention, in the gate used for injection molding the second color sheet and the second color sheet retainer, the axis of the gate is distributed parallel to the axis of the second color sheet.

[0021] According to one embodiment of the present invention, the axis of the improved latent side gate is distributed perpendicularly to the axis of the first color plate.

[0022] According to one embodiment of the present invention, the second color sheet and the second color sheet barrier are integrally formed structures.

[0023] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0024] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0025] 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 recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the gating gate at a conventional reinforcement point;

[0027] Figure 2 This is a schematic diagram of a conventional side gate;

[0028] Figure 3 This is a schematic diagram of a conventional latent side gate;

[0029] Figure 4 This is a schematic diagram of the gate of the present invention;

[0030] Figure 5 yes Figure 4 Decomposition structure diagram Figure 1 ;

[0031] Figure 6 yes Figure 4 Decomposition structure diagram Figure 2 ;

[0032] Figure 7 This is a diagram showing the positional relationship between the first color film and the improved latent edge casting.

[0033] Figure 8 This is a diagram showing the positional relationship between the second color filter and the gate;

[0034] Figure 9 yes Figure 8 A magnified view of a portion of the image.

[0035] The labels in the diagram are as follows: 1. First color piece; 2. Second color piece; 11. First upper horizontal edge; 12. First vertical edge; 13. First lower horizontal edge; 21. Second upper horizontal edge; 22. Second vertical edge; 23. Second lower horizontal edge; 3. First right angle; 4. Second right angle; 5. Second color piece retaining wall; 6. Aluminum-plated surface; 7. Improved submerged edge gating; 8. Gating gate. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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 some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] In the description of this invention, it should be understood that the terms "one side", "the other side", "both sides", "between", "middle", "upper end", "lower end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0038] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0039] The following describes in detail, with reference to the accompanying drawings, a gate design method for two-color products with an inner surface aluminum plating according to an embodiment of the present invention.

[0040] See Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9 The present invention provides a gate design method for two-color products with aluminum plating on the inner surface, comprising the following steps:

[0041] Step 1: Analyze the structural form of the two-color product with aluminum plating on the inner surface, including a first color sheet 1 located at the top and a second color sheet 2 located at the bottom. The bottom of the first color sheet 1 and the top of the second color sheet 2 are joined by a Z-shaped stop. The Z-shaped stop at the bottom of the first color sheet 1 includes a first upper horizontal edge 11, a first vertical edge 12, and a first lower horizontal edge 13, with the first upper horizontal edge 11 and the first vertical edge 12 forming a first right angle 3. The Z-shaped stop at the top of the second color sheet 2 includes a second upper horizontal edge 21, a second vertical edge 22, and a second lower horizontal edge 23, with the second upper horizontal edge 21 and the second vertical edge 22 forming a second right angle 4.

[0042] Step 2: Injection mold the second color sheet 2 and the second color sheet barrier 5. The second color sheet barrier 5 is located at the second right angle 4 of the second color sheet 2, and the width of the second color sheet barrier 5 is d1.

[0043] Step 3: Inject the first color sheet 1 using the improved submerged side gate 7. The axis of the improved submerged side gate 7 is parallel to the first upper transverse edge 11, and the sidewall of the improved submerged side gate 7 is in contact with the first upper transverse edge 11. The front end of the improved submerged side gate 7 is not in contact with the first vertical edge 12, and the gap between the front end of the improved submerged side gate 7 and the first vertical edge 12 is d2, where d2 = d1. The molten plastic in the improved submerged side gate 7 is redirected upwards by the blocking effect of the second color sheet baffle 5, and finally the first color sheet 1 is injection molded onto the second color sheet 2. The axis of the improved submerged side gate 7 is perpendicular to the axis of the first color sheet 1.

[0044] Furthermore, the inner surface of the first color film 1 is an aluminum-plated surface 6.

[0045] Preferably, the width of the second color plate barrier 5 is half the width of the first upper horizontal edge 11.

[0046] Preferably, the second color sheet 2 and the second color sheet barrier 5 are injection molded from the same gate 8. In the gate 8 used for injection molding the second color sheet 2 and the second color sheet barrier 5, the axis of the gate 8 is distributed parallel to the axis of the second color sheet 2. The second color sheet 2 and the second color sheet barrier 5 are integrally molded structures.

[0047] The gate design method of the present invention, applicable to two-color products with aluminum plating on the inner surface, significantly solves appearance quality problems such as cold material at the gate, gate reflection on the outer surface, and reflection on the aluminum-plated inner surface, greatly improving the product's visual appearance; it can be widely applied to improve the appearance problems of two-color products with aluminum plating on the inner surface; each such mold can improve the overall quality of the mold and reduce the occurrence of cold material problems, thus improving the production qualification rate.

[0048] The first color plate 1 of this invention adopts an improved submerged side gate 7, making full use of the knowledge of material flow and combining it with the design principles of existing mold gates. It breaks away from the design methods of rib-point gates, conventional side gates, and conventional submerged side gates, and adopts the concept of submerged side gates to optimize the gate design and improve the appearance visibility and the phenomenon of reflection on the aluminum-plated surface. First, a submerged side gate is used, and the gate does not directly connect to the sidewall, but instead fills upwards, forming a multi-corner structure. Furthermore, the gate size at the injection point is controlled and two-shot filling is ensured, forming a retaining wall structure, thereby improving the problems of cold material at the gate, surface, and reflection on the aluminum-plated surface.

[0049] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A gate design method for a bi-color product suitable for internal surface aluminizing, characterized in that, It comprises the following steps: Step 1, analyze the structure of the double-color product with the inner surface plated with aluminum, which comprises a first color sheet (1) located on the top and a second color sheet (2) located on the bottom, and the bottom of the first color sheet (1) is spliced with the top of the second color sheet (2) through a Z-shaped stopper; The Z-shaped stopper at the bottom of the first color sheet (1) comprises a first upper horizontal edge (11), a first vertical edge (12), and a first lower horizontal edge (13), and the first upper horizontal edge (11) and the first vertical edge (12) form a first right angle (3); The Z-shaped stopper at the top of the second color sheet (2) comprises a second upper horizontal edge (21), a second vertical edge (22), and a second lower horizontal edge (23), and the second upper horizontal edge (21) and the second vertical edge (22) form a second right angle (4); Step 2: injection molding the second color sheet (2) and the second color sheet barrier wall (5), the second color sheet barrier wall (5) is located at the second right angle (4) of the second color sheet (2), and the width of the second color sheet barrier wall (5) is d1; Step 3, injection molding the first color sheet (1) by using an improved latent edge gate (7), the axis of the improved latent edge gate (7) is parallel to the first upper horizontal edge (11), the side wall of the improved latent edge gate (7) is in contact with the first upper horizontal edge (11), the front end of the improved latent edge gate (7) is not in contact with the first vertical edge (12), and the gap between the front end of the improved latent edge gate (7) and the first vertical edge (12) is d2, wherein d2=d1, the molten plastic in the improved latent edge gate (7) is filled upward under the blocking action of the second color sheet barrier wall (5), and finally the first color sheet (1) is injection molded on the second color sheet (2).

2. The gate design method for bi-color products suitable for internal surface aluminizing according to claim 1, characterized in that: The first color sheet (1) is a transparent sheet, and the second color sheet (2) is a black sheet.

3. The gate design method for bi-color products suitable for internal aluminum plating according to claim 1, characterized in that: The width of the second color sheet barrier wall (5) is half of the width of the first upper horizontal edge (11).

4. The gate design method for bi-color products suitable for internal aluminum plating according to claim 1, characterized in that: The inner surface of the first color sheet (1) is an aluminum plated surface (6).

5. The gate design method for bi-color products suitable for internal aluminum plating according to claim 1, characterized in that: The second color sheet (2) and the second color sheet barrier wall (5) are injection molded by the same gate (8).

6. The method of designing a gate for a bi-colour product suitable for internal aluminium plating according to claim 5, wherein: In the gate for injection molding the second color sheet (2) and the second color sheet barrier wall (5), the axis of the gate is parallel to the axis of the second color sheet (2).

7. The method of designing a gate for a bi-color product suitable for internal aluminum plating as claimed in claim 1, wherein: The axis of the improved latent edge gate (7) is perpendicular to the axis of the first color sheet (1).

8. The method of designing a gate for a bi-color product with internal aluminum plating as claimed in claim 1, wherein: The second color sheet (2) and the second color sheet barrier wall (5) are integrally formed.

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