Mould structure for forcibly releasing position of TPU (Thermoplastic Polyurethane) flexible rubber circumference back-off by utilizing secondary ejection

Abstract

The utility model discloses a mould structure for forcibly releasing a position by utilizing secondary ejection of a TPU (thermoplastic polyurethane) flexible rubber circumference back-off, which comprises an ejector pin module, a straight ejection piece arranged on the ejector pin module and an ejector pin arranged in the straight ejection piece, a product back-off structure is arranged at the top of the straight ejection piece, a gas ejection movable block is arranged at the top of the straight ejection piece and is fixedly connected with the ejector pin, and the product back-off structure is arranged in the product back-off structure. The ejector pin is movably matched with the straight ejection piece, the straight ejection piece is provided with an air channel, and an exhaust port of the air channel is located in the top of the straight ejection piece. When a product is formed, the product is inversely buckled on the top of the straight ejection piece. During demolding, the product is firstly partially demolded, and then airflow in the air channel acts on the gas cap movable block and the product through the exhaust port, so that the product is demolded after being elastically deformed. According to the design, air flow and the gas cap movable block are used for assisting demolding of the inverted products, the products do not deform, and the quality of the products is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a mould, in particular to a mould of soft rubber product. BACKGROUND

[0002] As shown in the soft rubber product 60, in the mould, is in the state of reverse buckling when shaping. Figure 5 When ejection, because the hardness of the product is not enough, therefore, the ejector pin can make the product deform, leave the ejector pin mark, even eject the product. UTILITY MODEL CONTENT

[0003] The utility model solves the technical problem: for the soft rubber product in the state of reverse buckling, adopts the mode of ejector pin direct action on the product to eject, the product can deform, leave the ejector pin mark, even eject the product.

[0004] In order to solve the above technical problem, the utility model provides the following technical scheme: a mould structure that TPU soft rubber periphery reverse buckling uses secondarily ejects forcibly and releases the buckle position, including the ejector pin module that can displace forward and backward, the straight top piece that sets up on the ejector pin module, the ejector pin that sets up in the straight top piece, the top of straight top piece is equipped with product reverse buckling structure, the top of straight top piece is equipped with gas top movable block, gas top movable block is fixedly connected with the ejector pin, the ejector pin is movably combined with straight top piece, straight top piece is equipped with gas channel, and the exhaust port of gas channel is located at the top of straight top piece.

[0005] When product shaping, reverse buckling is in the top of straight top piece. When ejection, linear drive unit drives the ejector pin module to move forward, and the product partially ejects.

[0006] The side wall of product reverse buckling structure is equipped with annular groove, and the top of straight top piece is equipped with recess, and the gas top movable block is fitted in the recess. When the product of reverse buckling is shaped on the product reverse buckling structure, the annular groove forms the buckle position of the inner wall of product. When demoulding, straight top piece moves forward first, makes the product partially eject, and the buckle position of product leaves the mould cavity, and gives way for the subsequent complete demoulding of product.

[0007] The gas top movable block is equipped with gas flow exhaust port, and when demoulding, the gas flow between the gas top movable block and straight top piece enters the inner cavity of product reverse buckling through the gas flow exhaust port, makes product deform, and is beneficial to the buckle position to separate from the annular groove, and the product completely separates from straight top piece.

[0008] The gas inlet of gas channel is arranged on the side wall of straight top piece.

[0009] The straight ejector has a ejector pin hole and a strip-shaped limiting hole. The ejector pin is movably fitted in the ejector pin hole, and a limiting component is installed on the ejector pin. The limiting component and the strip-shaped limiting hole restrict the forward and backward displacement of the ejector pin, thereby limiting the forward and backward displacement of the air-jacking block relative to the straight ejector.

[0010] The top of the ejector pin extends into the hole in the rear mold core, which is mounted on the rear template. The rear template is fixed to the rear mold base, and the ejector pin module is movably fitted within the rear mold base. The ejector pin module is connected to the linear drive unit.

[0011] This invention utilizes airflow and an air-cushioned movable block to assist in the demolding of inverted products, resulting in no product deformation and improved product quality. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings:

[0013] Figure 1 This is a schematic diagram of the mold structure;

[0014] Figure 2 for Figure 1 A schematic diagram of the middle and rear templates 51 and the rear mold core 50 after they have been made transparent;

[0015] Figure 3 This is a schematic diagram of the transparent treatment of the straight-mounted component 20;

[0016] Figure 4 Exploded view of the direct-acting component 20;

[0017] Figure 5 This is a schematic diagram of product 60.

[0018] Explanation of symbols in the diagram:

[0019] 10. Ejector pin module;

[0020] 20. Straight-ended component; 21. Exhaust port; 22. Annular groove; 23. Recess; 24. Air inlet; 25. Strip-shaped limiting hole;

[0021] 30. Threshold pin;

[0022] 40. Air-supported movable block; 41. Airflow outlet;

[0023] 50. Rear mold core; 51. Rear template; 52. Rear mold frame;

[0024] 60. Product; 61. Product fastener; 62. Product inverted inner cavity. Detailed Implementation

[0025] Combination Figures 1 to 4A mold structure for TPU soft rubber with a perimeter undercut using secondary ejection to forcibly disengage the buckle includes an ejector pin module 10 capable of front-to-back displacement, a straight ejector 20 disposed on the ejector pin module, and an ejector pin 30 disposed in the straight ejector. The top of the straight ejector 20 is provided with a product undercut structure, and the top of the straight ejector is provided with an air ejector movable block 40. The air ejector movable block is fixedly connected to the ejector pin, and the ejector pin is movably engaged with the straight ejector. The straight ejector is provided with an air passage, and the exhaust port 21 of the air passage is located at the top of the straight ejector.

[0026] like Figure 4 The product has an annular groove 22 on the side wall of the inverted structure and a recess 23 on the top of the straight top part. The air top movable block 40 is fitted into the recess.

[0027] like Figure 4 The air-supported movable block 40 is equipped with an air outlet 41.

[0028] The air inlet 24 of the air passage is located on the side wall of the straight-end component 20, and the air pump is connected to the air inlet through a pipe.

[0029] Combination Figure 3 , Figure 4 The straight ejector 20 is provided with an ejector pin hole and a strip-shaped limiting hole 25. The ejector pin 30 is movably fitted in the ejector pin hole. The ejector pin is equipped with a limiting component, which is movably fitted in the strip-shaped limiting hole.

[0030] Combination Figure 1 , Figure 2 The top of the straight ejector 20 extends into the hole of the rear mold core 50. The rear mold core is installed on the rear template 51, and the rear template is fixed on the rear mold frame 52. The ejector pin module 10 is movably fitted in the rear mold frame.

[0031] The front mold plate (not shown in the attached drawing) covers the rear mold plate 51. The undercut structure on the top of the ejector pin 20 extends into the hole of the rear mold core 50. The front mold plate, the rear mold core, and the ejector pin constitute the mold cavity of the product. The molded product is undercut on the undercut structure of the ejector pin 20. The ejector pin module 10 is connected to a linear drive unit (such as a cylinder or hydraulic cylinder). During demolding, the front mold plate detaches from the rear mold plate 51, and the ejector pin 20 moves forward under the drive of the linear drive unit, causing part of the product 60 to exit the mold. The snap-fit ​​part 61 of the product leaves the mold cavity, making way for the complete demolding of the subsequent product. Afterward, air is injected into the air passage. The airflow acts on the air ejector block 40 through the exhaust port 21. The air ejector block moves forward and pushes the product 60 upward. At the same time, the airflow between the air ejector block 40 and the ejector pin 20 enters the inner cavity 62 of the undercut part of the product through the airflow exhaust port 41, causing the product to deform. The snap-fit ​​part 61 disengages from the annular groove 22, and the product completely detaches from the ejector pin 20, completing the demolding. The limiting component and the strip-shaped limiting hole 25 used in conjunction restrict the forward and backward displacement of the ejector pin 30, thereby limiting the forward and backward displacement of the air-lift movable block 40 relative to the straight ejector 20.

[0032] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A mold structure for forcibly releasing a TPU soft glue ring undercut position by using secondary ejection, comprising a ejector pin module (10) capable of forward and backward displacement, a straight ejector (20) provided on the ejector pin module, and an ejector pin (30) provided in the straight ejector, wherein the top of the straight ejector is provided with a product undercut structure, characterized in that: The top of the straight top piece is provided with a gas top movable block (40), the gas top movable block is fixedly connected with a thimble, the thimble is movably connected with the straight top piece, the straight top piece is provided with a gas channel, and an exhaust port (21) of the gas channel is located at the top of the straight top piece.

2. The mold structure for forcibly releasing the secondary ejection forced release position of the TPU soft gel peripheral ring reverse buckle according to claim 1, characterized in that: An annular groove (22) is arranged on the side wall of the product reverse buckling structure, the top of the straight top piece is provided with a recess (23), and the gas top movable block (40) is matched in the recess.

3. The mold structure for forcibly releasing the secondary ejection forced release position of the TPU soft gel peripheral ring reverse buckle according to claim 1, characterized in that: The gas top movable block (40) is provided with a gas flow exhaust port (41).

4. The mold structure for forcibly releasing the secondary ejection forced release position of the TPU soft gel peripheral ring reverse buckle according to claim 1, characterized in that: An air inlet (24) of the gas channel is arranged on the side wall of the straight top piece (20).

5. The mold structure for forcibly ejecting the TPU soft gel ring reverse buckle with secondary ejection forced buckle position according to claim 1, characterized in that: The straight top piece (20) is provided with a thimble hole position and a strip-shaped limiting hole (25), the thimble (30) is movably connected in the thimble hole position, the thimble is provided with a limiting piece, and the limiting piece is movably connected in the strip-shaped limiting hole.

6. The mold structure for forcibly releasing the secondary ejection forced release position of the TPU soft gel peripheral ring reverse buckle according to claim 1, characterized in that: The top of the straight top piece (20) extends into a hole position of a rear mold core (50), the rear mold core is arranged on a rear mold plate (51), the rear mold plate is fixed on a rear mold frame (52), and the thimble module (10) is movably connected in the rear mold frame.

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