Core-pulling injection mold of rear fender

Abstract

The utility model relates to a core-pulling injection mold of a rear fender, and belongs to the technical field of injection molds. Comprising a top plate, a foot plate, a fixed mold plate and a movable mold plate, a feeding port is formed in the top plate, core-pulling sliding blocks are arranged on the two sides of the fixed mold plate, fixedly-connected connecting pieces are arranged at the bottoms of the core-pulling sliding blocks, sliding rails are arranged on the two sides in the fixed mold plate, the connecting pieces are arranged in the sliding rails and slidably connected, and two clamping parts are arranged on one side of each connecting piece; fixedly-connected oil cylinders are arranged on the two side walls of the fixed mold plate, telescopic rods are arranged on the oil cylinders, and the telescopic rods are inserted into the sliding rails and fixedly connected with the clamping parts; according to the scheme, the connecting piece is used for connecting the core-pulling sliding block and the telescopic rod, when the telescopic rod on the oil cylinder stretches out and draws back, the connecting piece and the core-pulling sliding block can be driven to move together, so that the core-pulling work is completed, the two clamping parts are arranged on the connecting piece to be connected with the telescopic rod, connection between the connecting piece and the telescopic rod is more stable, and the core-pulling work is more stable. The service life of the mold is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molds and relates to a core-pulling injection mold for a rear fender. Background Art

[0002] When a two-wheeled vehicle passes through muddy roads or puddles, mud and water attached to the tires are thrown upward, easily staining the driver's clothes. Therefore, fenders are installed on both the front and rear tires. The rear fender is installed at the rear of the vehicle to block mud and water thrown up by the rear wheels. Because the rear fender is made of plastic, it can be manufactured through injection molding.

[0003] Because the rear fender wraps around the upper end of the wheel rim, it has an overall curved structure. The connection between the rear fender and the electric vehicle is formed using a core-pulling mechanism. While the core-pulling structures vary from mold to mold, their purpose is to pull the slider out of the mold cavity, allowing the mold inside to be properly demolded. A stable core-pulling mechanism can extend the mold's service life and prevent problems during demolding. Summary of the Invention

[0004] The purpose of the utility model is to address the problems existing in the existing technology and propose a core-pulling injection mold for a rear fender. The technical problem to be solved by the utility model is to improve the core-pulling mechanism so that the core-pulling mechanism is more stable during injection molding production.

[0005] The purpose of the utility model can be achieved through the following technical solutions: a core-pulling injection mold for a rear fender, comprising a top plate, a foot plate, a fixed template and a movable template, the top plate being provided with a feed port, a molding cavity being provided between the fixed template and the movable template, an injection-molded rear fender being provided in the molding cavity, a reciprocating push plate being provided on the inner side of the foot plate, a fixed demolding mechanism being provided on the push plate, core-pulling sliders being provided on both sides of the fixed template, fixed connecting parts being provided at the bottom of the core-pulling sliders, slide rails being provided on both sides of the interior of the fixed template, the connecting parts being provided inside the slide rails and slidably connected, two clamping parts being provided on one side of the connecting part, fixed oil cylinders being provided on both side walls of the fixed template, a telescopic rod being provided on the oil cylinder, the telescopic rod being inserted into the interior of the slide rails and fixedly connected to the clamping part.

[0006] In this solution, the oil cylinder is arranged at the bottom of the core-pulling slider, and the two sides of the oil cylinder are fixedly connected to the fixed template. Since the telescopic rod in the center of the oil cylinder is fixedly connected to the clamping part, when the telescopic rod is retracted, it will drive the clamping part and the connecting part to move to the outside of the slide rail, and the connecting part will drive the core-pulling slider fixed above to be pulled out. After demoulding is completed, the telescopic rod extends inward, driving the connecting part and the core-pulling slider to move inward to complete the reset; through the above method, a connecting part is used to connect the core-pulling slider and the telescopic rod. When the telescopic rod on the oil cylinder is extended and retracted, it can drive the connecting part and the core-pulling slider to move together, thereby completing the core pulling work, and two clamping parts are provided on the connecting part to connect the telescopic rod, so that the connection between the connecting part and the telescopic rod is more stable, thereby improving the service life of the mold.

[0007] In the core-pulling injection mold for the rear fender, the rear fender includes a connecting plate and a tail plate. The connecting plate has circular first mounting locations on either side, several second mounting holes are located along its edges, and a taillight hole is located in its center. The rear fender consists of two parts: the connecting plate and the tail plate. The first mounting locations and second mounting holes on the connecting plate are used to attach the entire rear fender to the battery vehicle frame, while the tail plate is used to block mud and water thrown up by the rear wheels.

[0008] In the core-pulling injection mold for the rear fender, a molding groove is defined on the inner side of the core-pulling slider. The first mounting position and the second mounting hole are formed within the molding groove. The outer side of the core-pulling slider has an abutment slope that abuts the bottom of the movable platen. The molding groove is connected to the molding cavity, allowing the structure within the molding groove to be integrally formed with the structure within the molding cavity. When the movable platen moves downward during mold closing, the bottom of the movable platen abuts the abutment slope, ensuring a more complete reset of the core-pulling slider and improving the precision of the injection molded product.

[0009] In the core-pulling injection mold for the rear fender, a feed port is located on the top plate. A nozzle is connected to the bottom of the feed port. One end of the nozzle passes through the push plate and the fixed platen, communicating with the molding cavity. Molten plastic material is injected through the feed port, first into the nozzle at the bottom of the runner, and then into the molding cavity. Once the molding cavity is filled, the solution is cooled and molded.

[0010] In the core-pulling injection mold for the rear fender, the push plate is equipped with several fixed slides, each equipped with a hinged inclined ejector rod. The push plate is also equipped with several fixed straight ejector pins, one end of which extends through the fixed platen to the bottom of the molding cavity. The ejector pins and inclined ejector rods form the demolding mechanism. After the melt in the molding cavity cools and forms, the movable platen is moved to open the mold, and the push plate on the inner side of the foot plate is pushed, causing the push plate to move the straight ejector pins and inclined ejector rods upward, thereby ejecting the molded rear fender.

[0011] In the core-pulling injection mold for the rear fender, a slidingly connected inclined ejector block is installed within the fixed platen. The end of the inclined ejector rod is fixedly connected to the inclined ejector block. The fixed platen, movable platen, core-pulling slider, and inclined ejector block together enclose a molding cavity. The rear fender has an overall curved structure, and the inclined ejector rod drives the inclined ejector block to eject obliquely toward the inside of the rear fender, facilitating demolding.

[0012] Compared with the prior art, the utility model has the following advantages:

[0013] 1. In this solution, a connector is used to connect the core-pulling slider and the telescopic rod. When the telescopic rod on the oil cylinder is extended or retracted, the connector and the core-pulling slider can be driven to move together, thereby completing the core pulling work. In addition, two clamping parts are provided on the connector to connect the telescopic rod, so that the connection between the connector and the telescopic rod is more stable, thereby improving the service life of the mold.

[0014] 2. In this solution, the molding groove is connected to the molding cavity, so that the structure in the molding groove and the structure in the molding cavity are formed in one piece. When the mold is closed, the movable plate moves down, and the bottom of the movable plate will abut against the abutting slope, so that the core-pulling slider can be reset more completely, thereby improving the precision of the injection molded product. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of the injection mold of the utility model;

[0016] Figure 2 This is a schematic diagram of the half-section structure of the utility model;

[0017] Figure 3 yes Figure 2 Schematic diagram of the local enlarged structure in;

[0018] Figure 4 This is a schematic diagram of the structure of the utility model in the open state;

[0019] Figure 5 It is a schematic structural diagram of the rear fender of the present utility model.

[0020] In the figure, 1, top plate; 1a, feed port; 1b, nozzle; 2, foot plate; 2a, push plate; 2b, slide; 2b1, inclined ejector rod; 2c, straight ejector pin; 3, fixed template; 3a, core-pulling slider; 3a1, abutting inclined surface; 3a2, forming groove; 3b, inclined ejector block; 3c, slide rail; 4, movable template; 5, oil cylinder; 5a, telescopic rod; 6, forming cavity; 7, connecting part; 7a, clamping part; 8, rear fender; 8a, connecting plate; 8a1, first mounting position; 8a2, second mounting hole; 8a3, taillight hole; 8b, tail plate. 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 core-pulling injection mold of the rear fender includes a top plate 1, a foot plate 2, a fixed mold plate 3 and a movable mold plate 4. The top plate 1 is provided with a feed port 1a, and both sides of the fixed mold plate 3 are respectively provided with slidingly connected core-pulling sliders 3a, and both sides of the fixed mold plate 3 are also provided with fixed cylinders 5.

[0024] like Figure 2 Combine Figure 3 As shown in the half-section structure diagram after rotation, a forming cavity 6 is provided between the fixed template 3 and the movable template 4, a nozzle 1b is connected to the bottom of the feed port 1a, one end of the nozzle 1b passes through the push plate 2a and the fixed template 3, and is connected to the forming cavity 6, the side of the core-pulling slider 3a away from the movable template 4 is provided with a fixed connecting member 7, and slide rails 3c are provided on both sides of the movable template 4. The connecting member 7 is provided inside the slide rail 3c and is slidably connected. Two clamping parts 7a are provided on one side of the connecting member 7, and the oil cylinder 5 A telescopic rod 5a is provided on it, which is inserted into the inside of the slide rail 3c and fixedly connected to the clamping part 7a. A reciprocating push plate 2a is provided on the inner side of the foot plate 2. A plurality of fixed slides 2b are provided on the push plate 2a. A hinged inclined ejector rod 2b1 is provided on the slide 2b. A slidingly connected inclined ejector block 3b is provided inside the fixed template 3. The end of the inclined ejector rod 2b1 is fixedly connected to the inclined ejector block 3b. The fixed template 3, the movable template 4, the core-pulling slider 3a and the inclined ejector block 3b together enclose a forming cavity 6.

[0025] like Figure 4 Combine Figure 5 As shown, the push plate 2a is provided with a plurality of fixed straight ejector pins 2c, one end of the straight ejector pin 2c passes through the fixed template 3 and extends to the bottom of the molding cavity 6, the side of the core-pulling slider 3a close to the movable template 4 is provided with an abutting inclined surface 3a1, the side of the core-pulling slider 3a close to the molding cavity 6 is provided with a molding groove 3a2, and the molding cavity 6 is provided with an injection-molded rear fender 8, the rear fender 8 includes a connecting plate 8a and a tail plate 8b, and first mounting positions 8a1 are provided on both sides of the connecting plate 8a, and the first mounting position 8a1 is circular in structure, and a plurality of second mounting holes 8a2 are provided at the edge of the connecting plate 8a, and a taillight hole 8a3 is provided at the center of the connecting plate 8a, and the first mounting position 8a1 and the second mounting hole 8a2 are molded in the molding groove 3a2.

[0026] The working principle of this scheme is as follows: Figure 1-5As shown, the plastic melt heated to a molten state is injected into the nozzle 1b from the feed port 1a, and the melt is injected into the molding cavity 6 through the flow channel inside the nozzle 1b. When the molding cavity 6 is filled, it is cooled and molded. When the rear fender 8 is formed, the movable template 4 is moved to open the mold, and the telescopic rod 5a on the oil cylinder 5 is controlled to retract. The rod pulls the fixed connecting part 7 to move outward, and the connecting part 7 then drives the fixed core-pulling slider 3a to move outward, thereby completing the core-pulling work, and finally pushes the push plate 2a on the inner side of the foot plate 2, so that the push plate 2a drives the inclined ejector rod 2b1 and the straight ejector pin 2c to extend from the fixed template 3, thereby ejecting the rear fender 8 from the mold.

[0027] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

[0028] Although this article frequently uses terms such as 1. ejector plate; 1a. feed port; 1b. nozzle; 2. foot plate; 2a. push plate; 2b. slide seat; 2b1. inclined ejector rod; 2c. straight ejector pin; 3. fixed plate; 3a. core-pulling slider; 3a1. abutting inclined surface; 3a2. forming groove; 3b. inclined ejector block; 3c. slide rail; 4. movable plate; 5. oil cylinder; 5a. telescopic rod; 6. forming cavity; 7. connecting member; 7a. clamping portion; 8. rear fender; 8a. connecting plate; 8a1. first mounting position; 8a2. second mounting hole; 8a3. taillight hole; 8b. tail plate, 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 invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A core-pulling injection mold for a rear fender, comprising a top plate (1), a foot plate (2), a fixed plate (3) and a movable plate (4), wherein the top plate (1) is provided with a feed port (1a), a molding cavity (6) is provided between the fixed plate (3) and the movable plate (4), an injection-molded rear fender (8) is provided in the molding cavity (6), a reciprocating push plate (2a) is provided on the inner side of the foot plate (2), and a demoulding mechanism is fixedly connected to the push plate (2a), characterized in that: Core-pulling sliders (3a) are provided on both sides of the fixed template (3), and fixed connecting members (7) are provided at the bottom of the core-pulling sliders (3a). Slide rails (3c) are provided on both sides of the interior of the fixed template (3), and the connecting members (7) are provided inside the slide rails (3c) and are slidably connected. Two clamping parts (7a) are provided on one side of the connecting member (7). Fixed oil cylinders (5) are provided on both side walls of the fixed template (3), and a telescopic rod (5a) is provided on the oil cylinder (5). The telescopic rod (5a) is inserted into the interior of the slide rail (3c) and is fixedly connected to the clamping part (7a).

2. The core-pulling injection mold for a rear fender according to claim 1, characterized in that: The rear fender (8) comprises a connecting plate (8a) and a tail plate (8b), wherein first mounting positions (8a1) are provided on both sides of the connecting plate (8a), the first mounting positions (8a1) being of a circular structure, a plurality of second mounting holes (8a2) are provided at the edge of the connecting plate (8a), and a taillight hole (8a3) is provided at the center of the connecting plate (8a).

3. The core-pulling injection mold for a rear fender according to claim 2, characterized in that: A forming groove (3a2) is provided on the inner side of the core-pulling slider (3a), the first mounting position (8a1) and the second mounting hole (8a2) are formed in the forming groove (3a2), the outer side of the core-pulling slider (3a) abuts against an inclined surface (3a1), and the abutting inclined surface (3a1) abuts against the bottom of the movable template (4).

4. The core-pulling injection mold for a rear fender 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 connected to a nozzle (1b), one end of the nozzle (1b) passes through the push plate (2a) and the fixed mold plate (3), and is connected to the molding cavity (6).

5. The core-pulling injection mold for a rear fender according to claim 1, characterized in that: The push plate (2a) is provided with a plurality of fixedly connected slides (2b), the slides (2b) are provided with hinged inclined ejector rods (2b1), the push plate (2a) is provided with a plurality of fixedly connected straight ejector pins (2c), one end of the straight ejector pins (2c) passes through the fixed mold plate (3) and extends to the bottom of the molding cavity (6), and the demoulding mechanism is composed of the straight ejector pins (2c) and the inclined ejector rods (2b1).

6. The core-pulling injection mold for a rear fender according to claim 5, characterized in that: A slidingly connected inclined ejector block (3b) is provided inside the fixed template (3), the end of the inclined ejector rod (2b1) is fixedly connected to the inclined ejector block (3b), and the fixed template (3), the movable template (4), the core-pulling slider (3a) and the inclined ejector block (3b) together enclose a molding cavity (6).

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