Air inlet grille blade of hidden gate and injection mold thereof

Abstract

This invention provides a concealed gate air intake grille blade and its injection mold. The injection mold includes a front mold and a rear mold that cooperate with each other, and a slider assembly disposed on one side of the front mold and the rear mold. A front mold core and a rear mold core are respectively disposed within the front mold and the rear mold core, forming a molding cavity. A hot runner insert is disposed within the front mold core, and a hot runner system is disposed above the hot runner insert. The slider assembly includes a slider seat and a slider head disposed within the slider seat. One end of the slider head extends into the rear mold core, and an air needle connecting rod is disposed at the upper part of the slider head. An air needle within the air needle connecting rod extends to the end side of the molding cavity. This invention combines injection molding and gas-assisted molding, resulting in a product with an aesthetically pleasing appearance. There is no gate visible from the front, eliminating the need for further cutting and processing, indirectly saving on product molding costs. Furthermore, this invention has fewer mold inserts, facilitating later maintenance.

Description

Technical Field

[0001] This utility model belongs to the field of injection mold technology, specifically relating to an air intake grille blade with a concealed gate and its injection mold. Background Technology

[0002] The grille is the front of a car, serving not only a decorative purpose but also influencing vehicle performance. An active grille shutter acts like a smart guardian, automatically adjusting to different operating conditions to comprehensively protect vehicle performance. When the engine temperature is low, it closes to accelerate warm-up and reduce emissions; at high speeds, timely closure reduces wind resistance, improving fuel economy and stability; and it opens when the engine needs cooling to ensure effective heat dissipation. During high-speed driving, air resistance significantly impacts fuel consumption. An active grille shutter can improve engine efficiency, optimize fuel economy, and protect the engine. During operation, the grille blades need to open or close. Existing grille blades are typically injection molded, but structural defects in the mold result in excess material at the injection gate, requiring subsequent trimming, which increases costs. However, if not trimmed, it affects the product's aesthetics. Utility Model Content

[0003] This invention provides an air intake grille blade with a concealed gate and its injection mold.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] An injection mold for a concealed gate air intake grille blade includes a front mold and a rear mold that cooperate with each other, and a slider assembly disposed on one side of the front mold and the rear mold. A front mold core and a rear mold core are respectively disposed in the front mold and the rear mold core, and a molding cavity is formed between the front mold core and the rear mold core.

[0006] A hot runner insert is provided inside the front mold core, and a hot runner system is provided above the hot runner insert. The slider assembly includes a slider seat and a slider head placed inside the slider seat. One end of the slider head extends into the rear mold core. An air needle connecting rod is provided at the upper part of the slider head, and an air needle in the air needle connecting rod extends to the end side of the molding cavity.

[0007] Preferably, the injection port of the hot runner system and the air port of the air needle are arranged perpendicular to each other.

[0008] Preferably, the hot runner insert is positioned above the end side of the molding cavity.

[0009] Preferably, the injection gate of the hot runner system is positioned against the inner end of the slider head.

[0010] Preferably, the injection gate of the hot runner system is positioned against the outer end of the slider head.

[0011] An air intake grille blade with a concealed gate is formed by any of the above injection molds, wherein the gate of the blade is attached to the end side of the blade and is integral with the end side of the blade.

[0012] The beneficial effects of this invention are as follows: The mold of this invention combines injection molding and gas-assisted molding, resulting in a beautiful-looking blade product with no gate visible from the front, eliminating the need for further cutting and processing, thus indirectly saving on product molding costs. Furthermore, the mold of this invention has fewer inserts, facilitating later maintenance. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 : A three-dimensional structural diagram of this utility model.

[0015] Figure 2 Side view of this utility model.

[0016] Figure 3 This utility model Figure 2 A schematic diagram of the AA cross-sectional structure.

[0017] Figure 4 : A schematic diagram of the molded product structure of this utility model. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the following description is provided in conjunction with the appendix. Figures 1-3 The present invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0019] This utility model proposes an injection mold for a concealed gate air intake grille blade, including a front mold and a rear mold that cooperate with each other, and a slider assembly disposed on one side of the front mold and the rear mold. A front mold core 3 and a rear mold core 8 are respectively disposed within the front mold and the rear mold core 3 and the rear mold core 8, which cooperate to form an injection molding cavity 9. The shape of the injection molding cavity 9 is similar to the product to be molded. Similar to conventional injection molds, an ejector plate and a rear mold base plate are sequentially disposed below the rear mold core 8. An ejector pin is vertically disposed on the ejector plate, and the upper end of the ejector pin extends through the front mold core towards the injection molding cavity 9.

[0020] A hot runner insert 2 is provided inside the front mold core 3, and a hot runner system 1 is provided above the hot runner insert 2. The injection channel of the hot runner system 1 is perpendicular to the hot runner insert 2.

[0021] The slider assembly includes a slider seat 7 and a slider head 6 placed within the slider seat 7, with one end of the slider head 6 extending into the rear mold core 8. An air needle connecting rod 5 is provided on the upper part of the slider head 6, and an air needle 4 is provided at the front end of the air needle connecting rod 5, extending to the end side of the molding cavity 9. Gas-assisted molding can be achieved by blowing air onto the injection-molded product through the air needle 4. This invention, by combining injection molding with gas-assisted molding, can further save more than 30% of plastic raw materials, while reducing the clamping force requirement of the injection molding machine and reducing equipment wear. Gas-assisted molding can better eliminate finished product depressions and reduce product warping deformation. In this invention, the injection gate of the hot runner system 1 and the air port of the air needle 4 are arranged perpendicularly to each other, and the air outlet end of the air needle is connected to the injection molding cavity.

[0022] To avoid excessive exposed gates affecting the product's appearance after molding, the hot runner insert 2 is positioned above the end side of the molding cavity 9. The gate of the hot runner system 1 is positioned against the inner or outer end side of the slider head 4. To ensure that the gate is well concealed when the blades are open and closed within the grid, the gate of the hot runner system 1 is preferably positioned against the outer end side of the slider head 4, i.e., the molded product... Figure 4 As shown.

[0023] In this invention, during blade forming, after the mold is closed, the hot runner system 1 first performs injection molding of the product. After injection molding, the product is held under pressure. Then, nitrogen gas is blown into the product by the air needle 4. After blowing is completed and the product is cooled, the mold is opened, and the product is ejected by the ejector pin and removed.

[0024] This utility model also discloses an air intake grille blade with a concealed gate formed by the above-mentioned injection mold. The blade body 91 is blade-shaped, with connecting shafts 93 at both ends. The blade is connected to the grille frame through the connecting shafts 93. The injection gate of the blade is attached to the end side of the blade, and the injection end 94 formed by the injection gate is integral with the end side 92 of the blade. The injection end 94 formed by the injection gate is integral with the side of the blade and is located on the inner side. When the blade is connected to the grille frame, the injection end 94 will always be hidden during the opening, closing and rotation process, achieving the aesthetics of the blade and eliminating the need for further processing, thus reducing molding costs. Finally, it should be noted that: since the structure of the injection mold in the figure of this utility model is similar to that of a conventional injection mold, the structure can be readily understood by those skilled in the art, so it is not fully shown. For example, the ejector plate, ejector pins, and rear mold base plate of the rear mold are not fully shown.

[0025] The terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] Furthermore, the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it; although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An injection mold for a concealed gate air intake grille blade, characterized in that: It includes a front mold and a rear mold that cooperate with each other, and a slider assembly disposed on one side of the front mold and the rear mold. The front mold and the rear mold are respectively provided with a front mold core and a rear mold core, and a molding cavity is formed between the front mold core and the rear mold core. A hot runner insert is provided inside the front mold core, and a hot runner system is provided above the hot runner insert. The slider assembly includes a slider seat and a slider head placed inside the slider seat. One end of the slider head extends into the rear mold core. An air needle connecting rod is provided at the upper part of the slider head, and an air needle in the air needle connecting rod extends to the end side of the molding cavity.

2. The injection mold for the concealed gate air intake grille blade as described in claim 1, characterized in that: The injection port of the hot runner system and the air port of the air needle are set perpendicular to each other.

3. The injection mold for the concealed gate air intake grille blade as described in claim 2, characterized in that: The hot runner insert is positioned above the end side of the molding cavity.

4. The injection mold for the air intake grille blade with a concealed gate as described in claim 1, characterized in that: The injection gate of the hot runner system is positioned against the inner end of the slider head.

5. The injection mold for the air intake grille blade with a concealed gate as described in claim 1, characterized in that: The injection gate of the hot runner system is positioned against the outer end of the slider head.

6. The air intake grille blades of the concealed gate, characterized in that: Formed by any one of the injection molds in claims 1-4, the sprue of the blade is attached to the end side of the blade and is integral with the end side of the blade.

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