Middle frame injection mold of electric vehicle headlamp

Abstract

The utility model relates to a middle frame injection mold of an electric vehicle headlamp, and belongs to the technical field of injection molds. Two forming cavities are formed between the fixed mold plate and the movable mold plate, a feeding port is formed in the top plate, the bottom of the feeding port is connected with a feeding runner arranged in the fixed mold plate, the two forming cavities are located on the two sides of the feeding runner, a connecting runner is arranged on the top of the movable mold plate, the bottom of the feeding runner is communicated with the connecting runner, and the connecting runner is in a cross shape. The bottom of the fixed mold plate is provided with two sprues, the sprues are respectively arranged above the two sides of the connecting runner, the section of a single sprue is triangular, the bottom of each sprue is communicated with the connecting runner, and the corner of one side of each sprue is communicated with the forming cavity; according to the scheme, the section of the pouring gate is triangular, and the corner of one side of the pouring gate is connected with the forming cavity, so that the joint of the pouring gate and the forming cavity is very narrow, the joint of the glue inlet part formed in the pouring gate and the headlamp frame is very thin, and subsequent treatment of the glue inlet part is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molds, and relates to an injection mold for the middle frame of an electric vehicle headlight. Background Technique

[0002] The middle frame of the headlight of an electric vehicle is a frame installed on the front enclosure of the electric vehicle, used to fix the headlight at the front end of the electric vehicle, so that when the electric vehicle is driving at night, it can illuminate the road ahead and provide safety guarantee for night driving. During the production and manufacturing process of the middle frame of the headlight, usually by means of mold injection, the plastic raw material heated to the molten state is injected into the mold. After cooling and forming, the formed product is ejected, and the product can be quickly manufactured.

[0003] To improve the production efficiency of the product, multiple forming cavities can be arranged inside the mold, so that the mold can produce multiple products at one time. This method is mostly used for some small-sized parts. In such an injection mold, since adjacent forming cavities are connected by a runner, a strip of gate piece will also be formed inside the runner, and the formed products will be connected by the gate piece. After taking the product out of the mold, it is necessary to cut and polish the gate piece to prevent the remaining part of the gate piece from affecting the aesthetics of the product. However, there are still some deficiencies in the injection molds in the prior art. The runner designs of some molds are unreasonable, and thick gate pieces will remain on the product, making it difficult to process the gate pieces and reducing the production efficiency. Summary of the Invention

[0004] The purpose of the utility model is to propose an injection mold for the middle frame of an electric vehicle headlight aiming at the problems existing in the prior art. The technical problem to be solved by the utility model is: to improve the internal structure of the mold so that the gate piece is easier to be processed.

[0005] The purpose of the utility model can be realized by the following technical solutions: An injection mold for the middle frame of an electric vehicle headlight, including a top plate, a fixed template, a movable template, a foot plate and a bottom plate arranged in sequence. There are two forming cavities between the fixed template and the movable template. The forming cavities are provided with injection-molded headlight frames. The top plate is provided with a feed port, and the bottom of the feed port is connected to a feed runner arranged inside the fixed template. The two forming cavities are located on both sides of the feed runner. The top of the movable template is provided with a connecting runner. The bottom of the feed runner is communicated with the connecting runner. The connecting runner is in a "cross" shape. The bottom of the fixed template is provided with two gates. The gates are respectively arranged above both sides of the connecting runner. The cross-section of a single gate is triangular. The bottom of the gate is communicated with the connecting runner. One side corner of the gate is communicated with the forming cavity.

[0006] In this solution, the plastic melt is injected into the feed runner from the feed inlet. After filling the connecting runner connected to the bottom of the feed runner, the plastic melt will continue to fill the gates connected to the top of both sides of the feed runner. Since one side corner of the gate is connected to the molding cavity, the plastic melt finally flows into the interior of the molding cavity. When the interior of the molding cavity is filled with the plastic melt and cooled and molded, the headlight frames in the two molding cavities are demolded and ejected, enabling two headlight frames to be produced in one mold clamping; in the above manner, since the cross-section of the gate is triangular and one side corner of the gate is connected to the molding cavity, the connection between the gate and the molding cavity is very narrow, and the connection part between the gate piece formed inside the gate and the headlight frame will also be very thin, facilitating subsequent processing of the gate piece.

[0007] In the above-mentioned injection mold for the middle frame of an electric vehicle headlight, a reciprocating push plate is provided inside the foot plate. A number of fixed straight ejector pins are provided on the push plate. One end of the straight ejector pin passes through the moving template and extends to the bottom of the molding cavity. One of the straight ejector pins is arranged directly below the connecting runner. The push plate can drive the fixed straight ejector pins to move together. During the demolding process, the push plate moves upward, causing the straight ejector pins to extend out of the moving template and eject the headlight frames molded on the moving template. Since one of the straight ejector pins is arranged at the bottom of the connecting runner, the gate piece formed inside the connecting runner can also be ejected together.

[0008] In the above-mentioned injection mold for the middle frame of an electric vehicle headlight, a number of fixed straight ejector rods are provided on the push plate. One end of the straight ejector rod passes through the moving template and extends to the top of the moving template. A molding part is provided on the side of the straight ejector rod. The molding part and the top surface of the moving template together form the bottom surface of the molding cavity. The straight ejector rods are used to cooperate with the straight ejector pins to eject the headlight frames. By arranging the straight ejector rods on the periphery of the molding cavity, the headlight frames can be more stably ejected from the moving template through the molding parts on the straight ejector rods.

[0009] In the above-mentioned injection mold for the middle frame of an electric vehicle headlight, headlight holes are provided on the headlight frame. A number of fixing positions are provided on the side of the headlight frame. A grille is provided on the front panel of the headlight frame. A cavity for forming the above-mentioned headlight frame structure is provided inside the molding cavity. The headlight holes are used to install the front headlights. The fixing blocks play a role in fixing and limiting, enabling the headlight frame to be installed on the front apron of the electric vehicle. The grille makes the headlight frame lighter.

[0010] In the above-mentioned injection mold for the middle frame of an electric vehicle headlight, the interior of the feed inlet has an inverted frustum structure. After the plastic melt enters the feed inlet, it will first be stored inside the feed inlet and then injected into the feed runner after the feed inlet is filled. The structure of the feed inlet can increase the pressure of the melt injected into the mold, enabling the melt to fill the molding cavity faster.

[0011] Compared with the prior art, the present utility model has the following advantages:

[0012] 1. In this solution, since the gate cross-section is triangular and one side corner of the gate is connected to the molding cavity, the connection between the gate and the molding cavity is very narrow, and the connection part between the glue inlet part formed inside the gate and the headlight frame is also very thin, which is convenient for subsequent processing of the glue inlet part.

[0013] 2. In this solution, after the plastic melt enters the feed inlet, it will first be stored inside the feed inlet and then injected into the feed runner after the inside of the feed inlet is filled. The structure of the feed inlet can increase the pressure of the melt injected into the mold, enabling the melt to fill the molding cavity faster. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0015] Figure 2 is a schematic diagram of the bottom-up half-section and partial enlarged structure of the present utility model;

[0016] Figure 3 is a schematic diagram of the internal structure of the molding cavity of the present utility model;

[0017] Figure 4 is a schematic diagram of the product structure of the headlight frame of the present utility model.

[0018] In the figure, 1. Top plate; 1a. Feed inlet; 2. Fixed template; 2a. Feed runner; 2b. Gate; 3. Movable template; 3a. Connecting runner; 4. Foot plate; 4a. Pusher plate; 4b. Straight ejector pin; 4c. Straight ejector rod; 4c1. Forming part; 5. Bottom plate; 6. Molding cavity; 7. Headlight frame; 7a. Headlight hole; 7b. Fixed position; 7c. Grille. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following are specific embodiments of the present utility model in combination with the accompanying drawings to further describe the technical solutions of the present utility model, but the present utility model is not limited to these embodiments.

[0020] Embodiment

[0021] As Figure 1 shown, in the injection mold for the middle frame of an electric vehicle headlight, it includes a top plate 1, a fixed template 2, a movable template 3, a foot plate 4, and a bottom plate 5 arranged in sequence. The top plate 1 is provided with a feed inlet 1a, and the inner side of the foot plate 4 is provided with a reciprocating pusher plate 4a.

[0022] As Figure 2 Combined with Figure 3As shown, the interior of the feed inlet 1a has an inverted frustum structure. There are two molding cavities 6 between the fixed template 2 and the movable template 3. An injection-molded headlight frame 7 is provided in the molding cavity 6. A feed runner 2a is provided inside the fixed template 2. The bottom of the feed inlet 1a is connected to the feed runner 2a. The two molding cavities 6 are located on both sides of the feed runner 2a. A connecting runner 3a is provided at the top of the movable template 3. The bottom of the feed runner 2a is connected and communicated with the connecting runner 3a. The connecting runner 3a is in a "cross" shape. Two gate openings 2b are provided at the bottom of the fixed template 2. The gate openings 2b are respectively arranged above both sides of the connecting runner 3a. The cross-section of a single gate opening 2b is triangular. The bottom of the gate opening 2b is connected and communicated with the connecting runner 3a. One side corner of the gate opening 2b is connected and communicated with the molding cavity 6. A number of fixedly connected straight ejector pins 4b and straight ejector rods 4c are provided on the ejector plate 4a. One end of the straight ejector pin 4b passes through the movable template 3 and extends to the bottom of the molding cavity 6. One of the straight ejector pins 4b is arranged directly below the connecting runner 3a. The straight ejector rods 4c are arranged on the periphery of the molding cavity 6. A molding portion 4c1 is provided on the side of the straight ejector rod 4c. The molding portion 4c1 and the top surface of the movable template 3 together form the bottom surface of the molding cavity 6.

[0023] As Figure 4 shown, the headlight frame 7 is provided with headlight holes 7a. A number of fixing positions 7b are provided on the side of the headlight frame 7. A grille 7c is provided on the front panel of the headlight frame 7. A cavity forming the above-mentioned headlight frame 7 structure is provided in the molding cavity 6.

[0024] The working principle of this solution is as follows. As Figures 1-4 shown, the plastic melt heated to the molten state is injected into the feed runner 2a from the feed inlet 1a. After filling the connecting runner 3a connected to the bottom of the feed runner 2a, the plastic melt will continue to fill the gate openings 2b connected to the top of both sides of the feed runner 2a. Since one side corner of the gate opening 2b is connected to the molding cavity 6, the plastic melt finally flows into the interior of the molding cavity 6. When the interior of the molding cavity 6 is filled with the plastic melt and cooled and formed, the movable template 3 is moved to open the mold. Then, an external mechanism is used to push the ejector plate 4a upward, so that the fixedly connected straight ejector pins 4b and straight ejector rods 4c on the ejector plate 4a are simultaneously ejected from inside the movable template 3, and the headlight frames 7 in the two molding cavities 6 are ejected together, enabling the mold to manufacture two headlight frames 7 in one mold closing. Finally, the gating parts connected to the headlight frame 7 are processed to complete the production of the headlight frame 7.

[0025] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0026] Although terms such as 1, top plate; 1a, feed inlet; 2, fixed template; 2a, feed runner; 2b, gate; 3, moving template; 3a, connecting runner; 4, foot plate; 4a, ejector plate; 4b, straight ejector pin; 4c, straight ejector rod; 4c1, forming part; 5, bottom plate; 6, forming cavity; 7, headlight frame; 7a, headlight hole; 7b, fixing position; 7c, grille are used more frequently in this text, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present utility model; interpreting them as any kind of additional limitation is contrary to the spirit of the present utility model.

Claims

1. An injection mold for the middle frame of an electric vehicle headlight, comprising a top plate (1), a fixed template (2), a movable template (3), a foot plate (4) and a bottom plate (5) arranged in sequence. There are two molding cavities (6) between the fixed template (2) and the movable template (3). A headlight frame (7) formed by injection molding is arranged in the molding cavity (6). An inlet port (1a) is arranged on the top plate (1), and the bottom of the inlet port (1a) is connected to a feed runner (2a) arranged inside the fixed template (2). It is characterized in that, The two molding cavities (6) are located on both sides of the feed runner (2a). A connecting runner (3a) is provided at the top of the moving template (3). The bottom of the feed runner (2a) is communicated with the connecting runner (3a). The connecting runner (3a) is in a "cross" shape. Two gates (2b) are provided at the bottom of the fixed template (2). The gates (2b) are respectively arranged above both sides of the connecting runner (3a). The cross-section of a single gate (2b) is triangular. The bottom of the gate (2b) is communicated with the connecting runner (3a). One side corner of the gate (2b) is communicated with the molding cavity (6).

2. The middle frame injection mold for an electric vehicle headlight according to claim 1, wherein A reciprocating push plate (4a) is provided inside the foot plate (4). A number of fixed straight ejector pins (4b) are provided on the push plate (4a). One end of the straight ejector pin (4b) passes through the moving template (3) and extends to the bottom of the molding cavity (6). One of the straight ejector pins (4b) is arranged directly below the connecting runner (3a).

3. The middle frame injection mold for an electric vehicle headlight according to claim 2, characterized in that, A number of fixed straight ejector rods (4c) are provided on the push plate (4a). One end of the straight ejector rod (4c) passes through the moving template (3) and extends to the top of the moving template (3). A molding part (4c1) is provided on the side of the straight ejector rod (4c). The molding part (4c1) and the top surface of the moving template (3) together form the bottom surface of the molding cavity (6).

4. The middle frame injection mold for an electric vehicle headlight according to claim 1, characterized in that, A headlight hole (7a) is provided on the headlight frame (7). A number of fixing positions (7b) are provided on the side of the headlight frame (7). A grille (7c) is provided on the front panel of the headlight frame (7). A cavity forming the above-mentioned structure of the headlight frame (7) is provided in the molding cavity (6).

5. The injection mold for the middle frame of an electric vehicle headlight according to claim 1, characterized in that, The inside of the feed inlet (1a) is in an inverted frustum structure.

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