Male die sliding block bottom submarine gate falling-off mechanism for injection molding of automobile B column

Abstract

The utility model discloses a male die sliding block bottom submarine gate falling-off mechanism for automobile B column injection molding, which comprises a sliding block, a gate insert, a sprue puller, a sprue puller fixing block, a spring, a pressing plate, a round ejector pin and a round ejector pin fixing block, the gate insert is fastened on the sliding block through a screw, the sprue puller fixing block is fastened at the lower end of the gate insert through a screw, and the spring is fixed on the pressing plate. The interior of the material pulling rod fixing block is connected with the material pulling rod, the material pulling rod is sleeved with the spring, and the pressing plate is fastened to the bottom of the material pulling rod fixing block through a screw so as to prevent the material pulling rod from falling off under the acting force of the spring; the round ejector pin penetrates through a round ejector pin fixing block, and the round ejector pin fixing block is fixedly connected with an ejector pin plate of an injection mold frame, so that the problem that the submarine gate automatically falls off when the sliding block moves in place due to selection limitation of motion characteristics of the sliding block on the submarine gate is solved; and the submarine gate can be conveniently ejected out, and balanced ejection of the submarine gate is also facilitated.

Description

Technical Field

[0001] This utility model belongs to the field of injection mold technology. Specifically, this utility model relates to a mechanism for removing the bottom gate of the punch slider for injection molding of automobile B-pillar. Background Technology

[0002] A gate, also known as a sprue, is a channel that runs from the runner to the mold cavity. It is the shortest and smallest cross-section in the gating system. The choice of gate type depends on factors such as the product's appearance requirements, size and shape constraints, and the type of plastic used. For exterior parts with undercuts that require a slider structure, such as automotive B-pillars, current mold designs often require the sprue to be inserted from the bottom of the slider—a non-exterior area—considering the product's appearance. Furthermore, the characteristics of the slider's movement significantly limit the choice of gate. Utility Model Content

[0003] This utility model provides a mechanism for removing the bottom gate of the punch slider in automotive B-pillar injection molding, in order to solve the technical problems existing in the background art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a gate detachment mechanism for the bottom of a punch slider used in automotive B-pillar injection molding, comprising a slider, a gate insert, a pull rod, a pull rod fixing block, a spring, a pressure plate, an ejector pin, and an ejector pin fixing block. The gate insert is fastened to the slider with screws, and the pull rod fixing block is fastened to the lower end of the gate insert with screws. The pull rod is internally connected to the pull rod, and the spring is sleeved on the pull rod. The pressure plate is fastened to the bottom of the pull rod fixing block with screws to limit the pull rod from falling under the spring force. The ejector pin passes through the ejector pin fixing block, and the ejector pin fixing block is fastened to the ejector plate of the injection mold base.

[0005] Preferably, the top of the pull rod is provided with a positioning boss.

[0006] A bottom submersible gate for a punch slider used in the injection molding of automotive B-pillars, wherein a weakening groove is provided at the lower end of one side of the submersible gate and a mounting platform is provided at the tail of the other side of the submersible gate.

[0007] The beneficial effects of adopting the above technical solutions are:

[0008] 1. This utility model relates to a subgate detachment mechanism at the bottom of the punch slider for automotive B-pillar injection molding. The slider moves to the right, carrying the gate insert, pull rod, pull rod fixing block, spring, and pressure plate together, pulling the subgate off the injection molded product. This continues until the slider moves to the right above the ejector pin. Then, the ejector pin fixing block moves upwards with the ejector pin, passing through the pressure plate and ejecting the pull rod. At this point, the spring is further compressed until the pull rod ejects the subgate, achieving automatic detachment of the subgate. A positioning boss is provided at the top of the pull rod to prevent the subgate from springing open during ejection, which could affect subsequent production. This utility model design solves the problem of automatic subgate detachment when the slider reaches its position due to limitations in subgate selection caused by the slider's motion characteristics.

[0009] 2. A bottom submersible gate for a punch slider used in automotive B-pillar injection molding, wherein a weakening groove is provided at the lower end of one side of the submersible gate and a hanging platform is provided at the tail of the other side of the submersible gate, which facilitates both the ejection of the submersible gate and the balanced ejection of the submersible gate. Attached Figure Description

[0010] Figure 1 This is an assembly drawing of the bottom gate removal mechanism for the punch slider of the automotive B-pillar injection molding process.

[0011] Figure 2 This is a cross-sectional view of the bottom gate removal mechanism of the punch slider for injection molding of automobile B-pillar according to this utility model.

[0012] Figure 3 This is a sectional view when the slider has reached its position.

[0013] Figure 4 This is a schematic diagram of the submerged gate structure;

[0014] in:

[0015] 1-1. Submerged gate; 1-2. Injection molded product;

[0016] 1. Slider; 2. Gate insert; 3. Pull rod; 4. Pull rod fixing block; 5. Spring; 6. Pressure plate; 7. Ejector pin; 8. Ejector pin fixing block;

[0017] 30. Positioning boss;

[0018] 100. Weakening tank; 101. Hanging platform. Detailed Implementation

[0019] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solution of this utility model, and to facilitate its implementation.

[0020] like Figures 1 to 4As shown, this utility model is a subgate detachment mechanism for the bottom of the punch slider in automotive B-pillar injection molding. It solves the problem that the subgate 1-1 automatically detaches when the slider 1 moves to the correct position due to the limitation of the slider 1's motion characteristics on the selection of the subgate 1-1. This facilitates the ejection of the subgate 1-1 and also facilitates the balanced ejection of the subgate 1-1.

[0021] Specifically, such as Figures 1 to 4 As shown, the system includes a slider 1, a gate insert 2, a pull rod 3, a pull rod fixing block 4, a spring 5, a pressure plate 6, an ejector pin 7, and an ejector pin fixing block 8. The gate insert 2 is fastened to the slider 1 with screws. The pull rod fixing block 4 is fastened to the lower end of the gate insert 2 with screws. The pull rod 3 is connected inside the pull rod fixing block 4. The spring 5 is sleeved on the pull rod 3. The pressure plate 6 is fastened to the bottom of the pull rod fixing block 4 with screws to prevent the pull rod 3 from falling under the force of the spring 5. The ejector pin 7 passes through the ejector pin fixing block 8, and the ejector pin fixing block 8 is fastened to the ejector plate of the injection mold base.

[0022] The top of the pull rod 3 is provided with a positioning boss 30.

[0023] A bottom submersible gate for a punch slider used in the injection molding of automotive B-pillars, wherein a weakening groove 100 is provided at the lower end of one side of the submersible gate 1, and a mounting platform 101 is provided at the tail of the other side of the submersible gate 1.

[0024] The specific working method is described below using specific embodiments:

[0025] Example 1:

[0026] This utility model discloses a subgate detachment mechanism for the bottom of the punch slider in automotive B-pillar injection molding. The slider 1 moves to the right, bringing with it the gate insert 2, pull rod 3, pull rod fixing block 4, spring 5, and pressure plate 6, pulling the subgate 1-1 off the injection molded product 1-2. This continues until the slider 1 moves to the right above the ejector pin 7. Then, the ejector pin fixing block 8 moves upwards with the ejector pin 7, passing through the pressure plate 6 and ejecting the pull rod 3. At this time, the spring 5 is further compressed until the pull rod 3 ejects the subgate 1-1, achieving the ejection and automatic detachment of the subgate 1-1. The pull rod 3 has a positioning boss 30 at its top to prevent the subgate 1-1 from springing open during ejection, which could affect subsequent production. This utility model design solves the problem of the subgate 1-1 automatically detaching when the slider 1 reaches its position due to the limited selection of the subgate 1-1 caused by the movement characteristics of the slider 1.

[0027] Example 2:

[0028] A bottom submersible gate for injection molding of automotive B-pillars is provided on the bottom of a punch slider. The lower end of one side of the submersible gate 1-1 is provided with a weakening groove 100, and the tail of the other side of the submersible gate 1-1 is provided with a hanging platform 101, which facilitates the ejection of the submersible gate 1-1 and also facilitates the balanced ejection of the submersible gate 1-1.

[0029] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A mechanism for removing the bottom gate of a punch slider in automotive B-pillar injection molding, characterized in that: The system includes a slider (1), a gate insert (2), a pull rod (3), a pull rod fixing block (4), a spring (5), a pressure plate (6), a round pin (7), and a round pin fixing block (8). The gate insert (2) is fastened to the slider (1) with screws. The pull rod fixing block (4) is fastened to the lower end of the gate insert (2) with screws. The pull rod fixing block (4) is internally connected to the pull rod (3). The spring (5) is sleeved on the pull rod (3). The pressure plate (6) is fastened to the bottom of the pull rod fixing block (4) with screws to prevent the pull rod (3) from falling under the force of the spring (5). The round pin (7) passes through the round pin fixing block (8), and the round pin fixing block (8) is fastened to the ejector plate of the injection mold base.

2. The mechanism for removing the bottom gate of the punch slider for automotive B-pillar injection molding according to claim 1, characterized in that: The top of the pull rod (3) is provided with a positioning boss (30).

3. A bottom gate for a punch slider used in injection molding of automotive B-pillars, characterized in that: A weakening groove (100) is provided at the lower end of one side of the submersible gate (1-1), and a hanging platform (101) is provided at the tail of the other side of the submersible gate (1-1).

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