Two-face blocking type tail box lower cover injection mold

Abstract

The utility model relates to a two-side opening type tail box lower cover injection mold, and belongs to the technical field of injection molds. Comprising a top plate, a fixed mold plate, a movable mold plate, a connecting plate, a foot plate and a bottom plate which are sequentially arranged, a center forming piece is arranged in the movable mold plate, side forming pieces are arranged on the two sides of the center forming piece, an end forming piece is arranged at one end of the center forming piece, and fence forming pieces are arranged at the four corners of the bottom of the center forming piece; guide blocks in sliding connection are arranged on the four fence forming pieces, incline towards the center of the forming cavity and are fixedly connected with the connecting plate; according to the scheme, the fence forming pieces at the corners can be subjected to inclined inward core pulling and are separated from the lower tail box, and then the lower tail box is ejected out of the mold through the end forming pieces and the side forming pieces, so that the lower tail box can be completely demolded from the mold, the situation of adhesion and clamping in the demolding process is avoided, the finished product rate of products is increased, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molds and relates to a double-side open-type tail box lower cover injection mold. Background Art

[0002] With the continuous development of society, people use electric vehicles as their main means of transportation for daily short-distance travel and commuting, so the market demand for electric vehicles continues to increase. In the structure of electric vehicles, the trunk can be used to store items needed for travel. In the production process of the trunk, since the trunk is mainly made of plastic raw materials, mold injection molding can be used to produce trunk products efficiently and stably.

[0003] The trunk includes an upper cover and a lower cover. The lower cover is fixedly installed at the rear of the electric vehicle. The upper cover is hingedly connected to the lower cover and can be rotated to open. However, the injection mold used to produce the lower cover of the trunk in the prior art still has some shortcomings. After the lower cover of the trunk is formed, the molded part is completely wrapped inside, and adhesion and jamming are likely to occur during demoulding, resulting in poor yield and production efficiency of plastic parts. Summary of the invention

[0004] The utility model aims at the problems existing in the prior art and proposes a double-side open tail box lower cover injection mold. The technical problem to be solved by the utility model is: how to prevent the tail box lower cover from sticking and jamming during the demoulding process.

[0005] The purpose of the utility model can be achieved through the following technical solutions: a double-sided open-type trunk lower cover injection mold, comprising a top plate, a fixed mold plate, a movable mold plate, a connecting plate, a foot plate and a bottom plate arranged in sequence, the connecting plate is fixedly connected to the foot plate, a push plate that moves back and forth is provided on the inner side of the foot plate, a molding cavity is provided between the fixed mold plate and the movable mold plate, an injection-molded lower trunk is provided in the molding cavity, a central molding part is provided inside the movable mold plate, side molding parts are provided on both sides of the central molding part, an end molding part is provided at one end of the central molding part, and enclosure molding parts are provided at the four corners of the bottom of the central molding part, and a slidably connected guide block is provided on the four enclosure molding parts, the guide block is inclined to the center of the molding cavity and is fixedly connected to the connecting plate, a straight push rod is provided on the push plate, and the top of the straight push rod is abutted against the bottom of the movable mold plate.

[0006] In the present scheme, the bottom structure of the molding cavity is composed of the center molding part, the end molding part, the side molding part and the enclosure molding part, forming a molding structure with two sides open. The molded lower tail cover is wrapped around the outside of the above-mentioned molding part. During the demoulding process, the connecting plate, the foot plate and the bottom plate are fixed and the push plate is pushed outward. The push plate drives the end molding part and the side molding part to be ejected from the inside of the movable template. At the same time, the straight ejector rod on the push plate drives the movable template to move outward together. During the movement of the movable template, the enclosure molding part drives the enclosure molding part outward. Since the enclosure molding part is slidably connected with the guide block, the enclosure molding part will also move toward the center point of the molding cavity under the guiding action of the guide block to realize the function of inward core pulling; through the above method, the enclosure molding part at the corners will be obliquely pulled inward and separated from the lower tail box, and then the lower tail box is ejected from the mold through the end molding part and the side molding part, so that the lower tail box can be completely demoulded from the mold, avoiding the situation of adhesion and jamming during the demoulding process, improving the product yield and improving production efficiency.

[0007] In the above-mentioned double-side opening tail box lower cover injection mold, the guide block is provided with a slide rail inclined toward the center of the molding cavity, and the enclosure molding is provided with a corresponding slider, and the slider cooperates with the slide rail to make the enclosure molding and the guide block slidably connected. The guide block and the enclosure molding are connected by the structure of the slider and the slide rail, so that the enclosure molding can move along the direction of the slide rail.

[0008] In the above-mentioned double-side open tail box lower cover injection mold, a mounting port is provided on one side of the bottom of the lower tail box, and a mounting frame is provided on the other side. An insert for forming the mounting port and mounting frame structure is provided inside the fixed template. One end of the insert extends to the outside of the fixed template, and a core-pulling mechanism is fixedly connected to the end. The mounting port and mounting frame structure are used to connect with the structure on the electric vehicle to improve the stability of the lower tail box after installation. The insert is used to form the above structure, and the insert needs to be pulled out of the molding cavity by the core-pulling mechanism during the demoulding process.

[0009] In the above-mentioned double-side opening tail box lower cover injection mold, the core pulling mechanism includes a base located on the upper and lower sides of the fixed mold plate, a cylinder is arranged inside the base, a telescopic rod is arranged on the cylinder, and the telescopic rod is fixedly connected to the insert. The specific structure of the core pulling is that the cylinder drives the telescopic rod to extend and retract, so as to pull the insert out of the fixed mold plate.

[0010] In the above-mentioned double-sided open tail box lower cover injection mold, the top plate is slidably connected to the fixed mold plate, and a limit block is provided on the top plate. One side of the limit block is inserted into the interior of the insert and connected with the insert by clamping. In the process of the plastic melt filling the molding cavity, pressure will be generated inside the molding cavity. In order to prevent the internal pressure from pushing the insert out of position, the position of the insert is fixed by the limiter. When demolding, the top plate is moved first, the limiter is pulled out from the insert, and then the insert is pulled out by the core pulling mechanism.

[0011] In the above-mentioned double-side open tail box lower cover injection mold, the top plate is provided with a feed port, the bottom of the feed port is provided with a feed flow channel, the bottom of the feed flow channel is connected to the molding cavity, and the top plate and the bottom plate are provided with support legs. The plastic melt heated to a molten state is injected from the feed port and fills the molding cavity through the feed flow channel at the bottom, and the support legs are used to support the entire mold.

[0012] In the above-mentioned double-side opening tail box lower cover injection mold, the bottom of the side molding and the end molding are both provided with a fixedly connected inclined ejector rod, the upper end of the inclined ejector rod is facing the center of the molding cavity, and the bottom of the inclined ejector rod is provided with a hinged slide seat, which is fixedly connected to the push plate. The slide seat is used to connect the inclined ejector rod and the push plate, and the push plate pushes the side molding and the end molding to move through the inclined ejector rod.

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] 1. In this scheme, the enclosure moldings at the corners will be pulled out obliquely inward to separate from the lower tail box, and then the lower tail box will be ejected from the mold through the end moldings and side moldings, so that the lower tail box can be completely demolded from the mold, avoiding the situation of sticking and jamming during the demolding process, improving the product yield and production efficiency.

[0015] 2. In this scheme, during the process of filling the molding cavity with plastic melt, pressure will be generated inside the molding cavity. In order to prevent the internal pressure from pushing the insert out of place, the position of the insert is fixed by a limiter. When demolding, first move the top plate, pull the limiter out of the insert, and then pull out the insert through the core pulling mechanism to improve the stability during the injection molding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the injection mold of the utility model;

[0017] Figure 2 It is a right side half-section structural schematic diagram of the injection mold of the utility model;

[0018] Figure 3 It is a schematic diagram of the internal two-side opening structure of the movable template of the utility model;

[0019] Figure 4 It is a structural schematic diagram of the lower tail box product of the utility model.

[0020] In the figure, 1, top plate; 1a, feed port; 1b, feed channel; 1c, limit block; 2, fixed template; 2a, base; 2b, cylinder; 2b1, telescopic rod; 2c, insert; 3, movable template; 3a, center molding part; 3b, end molding part; 3c, side molding part; 3d, enclosure molding part; 3d1, slider; 4, connecting plate; 4a, guide block; 4a1, slide rail; 5, foot plate; 5a, push plate; 5b, straight ejector rod; 5c, slide seat; 5c1, inclined ejector rod; 6, bottom plate; 7, molding cavity; 8, lower tail box; 8a, installation port; 8d, installation frame; 9, support foot. DETAILED DESCRIPTION

[0021] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0022] Example

[0023] like Figure 1 As shown, the double-sided open-type trunk lower cover injection mold includes a top plate 1, a fixed mold plate 2, a movable mold plate 3, a connecting plate 4, a foot plate 5 and a bottom plate 6 arranged from left to right, the top plate 1 is slidably connected to the fixed mold plate 2, the fixed mold plate 2 is slidably connected to the movable mold plate 3, the movable mold plate 3 is slidably connected to the connecting plate 4, the connecting plate 4, the foot plate 5 and the bottom plate 6 are fixedly connected, a feed port 1a is provided on the top plate 1, a base 2a is provided on the upper and lower sides of the fixed mold plate 2, a fixed cylinder 2b is provided on the inner side of the base 2a, a slidably connected push plate 5a is provided on the inner side of the foot plate 5, and support feet 9 are provided at the bottom of the top plate 1 and the bottom plate 6.

[0024] like Figure 2 Combination Figure 3As shown, a molding cavity 7 is provided between the fixed mold plate 2 and the movable mold plate 3, a feeding channel 1b is provided at the bottom of the feed port 1a, and the bottom of the feeding channel 1b is connected to the molding cavity 7, a central molding part 3a is provided inside the movable mold plate 3, side molding blocks are provided on both sides of the central molding part 3a, an end molding part 3b is provided at one end of the central molding part 3a, four enclosure molding parts 3d are provided at the bottom corners of the central molding part 3a, and guide blocks 4a for sliding connection are provided inside the enclosure molding parts 3d, respectively, slide rails 4a1 extending toward the center of the molding cavity 7 are provided on the guide blocks 4a, and corresponding sliders 3d1 structures are provided on the enclosure molding parts 3d, and the sliders 3d1 can reciprocate inside the slide rails 4a1, and the bottom of the guide blocks 4a is fixedly connected to the connecting plate 4, and the bottoms of the side molding parts 3c and the end molding parts 3b are both provided with fixedly connected inclined ejector rods 5c1, and the inclined ejector rods 5c 1 is oriented toward the center of the molding cavity 7, a hinged slide 5c is provided at the bottom of the inclined ejector rod 5c1, the slide 5c is fixedly connected to the push plate 5a, a fixed straight ejector rod 5b is provided on the push plate 5a, and the top of the straight ejector rod 5b is against the bottom of the movable template 3.

[0025] like Figure 2 Combination Figure 4 As shown, a telescopic rod 2b1 is provided on the cylinder 2b, an injection-molded lower tail box 8 is provided in the molding cavity 7, a mounting port 8a is provided on one side of the bottom of the lower tail box 8, and a mounting frame 8d is provided on the other side, and inserts 2c for forming the mounting port 8a and the mounting frame 8d structure are provided on both sides of the interior of the fixed template 2, one end of the insert 2c extends to the outside of the fixed template 2 and is fixedly connected to the telescopic rod 2b1, a fixed limit block 1c is provided on the top plate 1, and the bottom of the limit block 1c is inserted into the interior of the insert 2c and is connected with the insert 2c by snapping.

[0026] The working principle of this scheme is as follows: Figure 1-4As shown, after the plastic raw material is heated to a molten state, the plastic melt is injected from the feed port 1a, and the molding cavity 7 is filled through the feed channel 1b at the bottom. After the molding cavity 7 is filled, the plastic melt inside is cooled and formed, and then the demoulding process is performed. When demoulding, the top plate 1 is first moved to drive the limit block 1c to move, and the contact limit block 1c is engaged with the insert 2c, and then the insert 2c is pulled out of the upper and lower sides respectively through the cylinder 2b, and then the dynamic template 3 is pushed to open the mold. After the mold is opened, the push plate 5a is pushed upward, and the push plate 5a drives the straight push rod 5b and the inclined push rod 5 c1 is ejected, and the straight ejector rod 5b is pressed against the movable template 3 to separate the movable template 3 from the connecting plate 4. The movable template 3 drives the enclosure molding 3d to move outward during the movement. Under the guidance of the guide block 4a, the enclosure molding 3d will also move toward the center of the molding cavity 7 to realize the function of inward core pulling. The enclosure molding 3d is separated from the side wall of the lower tail box 8 during the movement to achieve the demoulding effect. At the same time, the inclined ejector rod 5c1 pushes the end molding 3b and the side molding 3c to be ejected from the movable template 3, so that the lower tail box 8 can be completely separated from the movable template 3.

[0027] The specific embodiments described herein are merely examples of the spirit of the present invention. A person skilled in the art of the present invention may make various modifications or additions to the specific embodiments described or replace them in a similar manner, but this will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0028] Although this article uses more terms such as 1, top plate; 1a, feed port; 1b, feed channel; 1c, limit block; 2, fixed template; 2a, base; 2b, cylinder; 2b1, telescopic rod; 2c, insert; 3, movable template; 3a, center molding; 3b, end molding; 3c, side molding; 3d, enclosure molding; 3d1, slider; 4, connecting plate; 4a, guide block; 4a1, slide rail; 5, foot plate; 5a, push plate; 5b, straight ejector; 5c, slide seat; 5c1, inclined ejector; 6, bottom plate; 7, molding cavity; 8, lower tail box; 8a, installation port; 8d, mounting frame; 9, support foot, etc., it does not exclude the possibility of using other terms. The use of these terms is only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A double-sided open-type tail box lower cover injection mold, comprising a top plate (1), a fixed plate (2), a movable plate (3), a connecting plate (4), a foot plate (5) and a bottom plate (6) arranged in sequence, wherein the connecting plate (4) is fixedly connected to the foot plate (5), a reciprocating push plate (5a) is provided on the inner side of the foot plate (5), a molding cavity (7) is provided between the fixed plate (2) and the movable plate (3), and an injection-molded lower tail box (8) is provided in the molding cavity (7), characterized in that: The movable template (3) is provided with a central molding part (3a) inside, and side molding parts (3c) are provided on both sides of the central molding part (3a), and an end molding part (3b) is provided at one end of the central molding part (3a), and enclosure molding parts (3d) are provided at the four corners of the bottom of the central molding part (3a), and the four enclosure molding parts (3d) are provided with slidingly connected guide blocks (4a), and the guide blocks (4a) are inclined toward the center of the molding cavity (7) and are fixedly connected to the connecting plate (4), and the push plate (5a) is provided with a straight push rod (5b), and the top of the straight push rod (5b) is against the bottom of the movable template (3).

2. The double-side opening tail box lower cover injection mold according to claim 1, characterized in that: The guide block (4a) is provided with a slide rail (4a1) inclined toward the center of the molding cavity (7), and the enclosure molding part (3d) is provided with a corresponding slider (3d1). The slider (3d1) cooperates with the slide rail (4a1) so that the enclosure molding part (3d) and the guide block (4a) are slidably connected.

3. The double-side opening tail box lower cover injection mold according to claim 1, characterized in that: The bottom side of the lower tail box (8) is provided with a mounting opening (8a) and the other side is provided with a mounting frame (8d). The fixed mold plate (2) is provided with an insert (2c) for forming the structure of the mounting opening (8a) and the mounting frame (8d). One end of the insert (2c) extends to the outside of the fixed mold plate (2), and a core-pulling mechanism is fixedly connected to the end.

4. The double-side opening tail box lower cover injection mold according to claim 3, characterized in that: The core-pulling mechanism comprises a base (2a) located on the upper and lower sides of a fixed mold plate (2), a cylinder (2b) is provided inside the base (2a), a telescopic rod (2b1) is provided on the cylinder (2b), and the telescopic rod (2b1) is fixedly connected to the insert (2c).

5. The double-side opening tail box lower cover injection mold according to claim 4, characterized in that: The top plate (1) is slidably connected to the fixed mold plate (2); a limit block (1c) is provided on the top plate (1); one side of the limit block (1c) is inserted into the interior of the insert (2c) and is snap-connected with the insert (2c).

6. The double-side opening tail box lower cover injection mold according to claim 1, characterized in that: The top plate (1) is provided with a feed port (1a), the bottom of the feed port (1a) is provided with a feed channel (1b), the bottom of the feed channel (1b) is connected to the molding cavity (7), and the top plate (1) and the bottom plate (6) are provided with support legs (9).

7. The double-side opening tail box lower cover injection mold according to claim 1, characterized in that: The bottoms of the side molding pieces (3c) and the end molding pieces (3b) are both provided with fixedly connected inclined push rods (5c1), the upper ends of the inclined push rods (5c1) are both facing the center of the molding cavity (7), and the bottoms of the inclined push rods (5c1) are provided with hinged slide seats (5c), and the slide seats (5c) are fixedly connected to the push plates (5a).

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