Tail structure of glass reinforced plastic pipe winding mold

Abstract

A tail structure of a glass reinforced plastic pipe winding mold relates to the technical field of glass reinforced plastic pipe molds and comprises a tail shaft, the interior of the tail shaft is of a hollow structure, a step is arranged in the tail shaft, a hexagonal screw is arranged on the step, one end of the hexagonal screw extends out of the tail shaft, the other end of the hexagonal screw is sleeved with a spring, and the other end of the spring is sleeved on an ejector pin. The other end of the ejector pin extends out of the tail shaft, the ejector pin is sleeved with a gasket and a clamping spring, the gasket and the clamping spring are both arranged in the tail shaft, a plurality of round holes are formed in the outer wall of the tail shaft in the circumferential direction of the tail shaft at equal intervals, balls are arranged in the round holes, and the balls make contact with the ejector pin. According to the utility model, the ball can be ejected out by arranging the movable ejector pin, and the mold is locked by matching with the tensioning device, so that the problems that the mold is unstable and the pin is easy to fall off when the mold is fixed by using the pin traditionally are solved, the product stability is ensured, and the product quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of glass fiber reinforced plastic pipe moulds, in particular to a tail structure of a glass fiber reinforced plastic pipe winding mould. Background Art

[0002] FRP pipes are generally formed using a wet winding process, especially epoxy FRP pipes, which are formed by wet winding through steam curing. The winding mold needs to be fixed on the equipment. During the winding process, the mold needs to be tightened to prevent the mold from swinging or shaking, affecting the line shape or tension, thereby causing unstable product quality.

[0003] Currently, the winding mold for epoxy fiberglass pipes on the market is equipped with a keyway at the tail end, and the mold is fixed and tightened by inserting pins. During the winding process, there is a problem that the pins are easy to loosen, fall off or break, thereby affecting production efficiency or product quality. Utility Model Content

[0004] In view of the above deficiencies in the prior art, the purpose of the present invention is to provide a tail structure for a FRP pipe winding mold, which can solve the problem that the pins of the existing FRP mold are easily loosened, fallen off or broken during the winding process.

[0005] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0006] A tail structure of a glass fiber reinforced plastic pipe winding mold includes a tail shaft, the interior of the tail shaft is a hollow structure, a step is provided in the tail shaft, a hexagonal screw is provided on the step, one end of the hexagonal screw extends out of the tail shaft, and the other end is sleeved with a spring, the other end of the spring is sleeved on an ejector pin, the other end of the ejector pin extends out of the tail shaft, and a washer and a retaining spring are sleeved on the outside of the ejector pin, the washer and retaining spring are both arranged in the tail shaft, a plurality of circular holes are opened on the outer wall of the tail shaft at equal intervals along its circumferential direction, and balls are provided in each of the plurality of circular holes, and the balls are in contact with the ejector pin.

[0007] Preferably, the cross section of the circular hole is a trapezoidal structure, and the hole diameter gradually decreases from the inside to the outside.

[0008] Preferably, the ejector pin adopts a spindle-shaped structure, and a groove with an inverted trapezoidal structure is provided in the middle of the ejector pin.

[0009] Preferably, the ball is made of high-carbon chromium steel, and the diameter of the ball is larger than the outer diameter of the circular hole and smaller than the inner diameter of the circular hole.

[0010] Compared with the existing technology, the beneficial effects of the present invention are as follows: the present invention can eject the ball by setting a movable ejector pin, and then lock the mold with a tightening device, solving the problems of instability and easy falling off of the traditional pin fixation of the mold, thereby ensuring product stability and improving product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0013] Description of reference numerals:

[0014] 1-tail shaft, 2-step, 3-hexagonal screw, 4-spring, 5-thimble, 6-washer, 7-circlip, 8-ball, 9-mold. DETAILED DESCRIPTION

[0015] The following describes the invention of the present invention in detail by way of examples in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Example

[0016] like Figure 1 As shown, the utility model discloses a tail structure of a glass fiber reinforced plastic pipe winding mold, including a tail shaft 1, the interior of the tail shaft 1 is a hollow structure, a step 2 is provided in the tail shaft 1, a hexagonal screw 3 is provided on the step 2, one end of the hexagonal screw 3 extends out of the tail shaft 1, and the other end is sleeved with a spring 4, the other end of the spring 4 is sleeved on an ejector pin 5, the ejector pin 5 adopts a spindle-shaped structure, the middle part of the ejector pin 5 is provided with an inverted trapezoidal groove, the other end of the ejector pin 5 extends out of the tail shaft 1 and the outer side of the ejector pin 5 is sleeved There are a washer 6 and a retaining spring 7, both of which are arranged in the tail shaft 1. The retaining spring 7 limits the washer 6, and the washer 6 limits the ejector 5. Four circular holes are equidistantly opened on the outer wall of the tail shaft 1 along its circumferential direction. The cross-section of the circular holes is a trapezoidal structure, and the aperture gradually decreases from the inside to the outside. Balls 8 are provided in the four circular holes. The material of the balls 8 is high-carbon chromium steel. The diameter of the balls 8 is larger than the outer aperture of the circular holes and smaller than the inner aperture of the circular holes. The balls 8 are in contact with the ejector 5.

[0017] During use, the tail shaft 1 is installed at the tail of the mold 9 through the hexagonal screw 3. When the mold 9 needs to be locked, the driving device on the demoulding trolley drives the ejector 5 to move into the tail shaft 1 so that the ball 8 pops out, and the locking device cooperates to lock the mold; when locking is not needed, the driving device is withdrawn, and the spring 4 is used to reset the ejector 5, and the ball 8 falls into the groove of the ejector 5. At this time, the mold 9 is not locked.

[0018] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and application concept of the present invention, should be covered by the protection scope of the present invention.

Claims

1. A tail structure of a glass fiber reinforced plastic pipe winding mold, characterized by: The invention comprises a tail shaft (1), wherein the interior of the tail shaft (1) is a hollow structure, a step (2) is provided in the tail shaft (1), a hexagonal screw (3) is provided on the step (2), one end of the hexagonal screw (3) extends out of the tail shaft (1), and the other end is sleeved with a spring (4), the other end of the spring (4) is sleeved on a thimble (5), the other end of the thimble (5) extends out of the tail shaft (1), and a washer (6) and a retaining spring (7) are sleeved on the outside of the thimble (5), the washer (6) and the retaining spring (7) are both provided in the tail shaft (1), a plurality of circular holes are equidistantly opened on the outer wall of the tail shaft (1) along its circumferential direction, a plurality of circular holes are provided in each of the plurality of circular holes, and the balls (8) are in contact with the thimble (5).

2. The tail structure of the glass fiber reinforced plastic pipe winding mold according to claim 1, characterized in that: The cross section of the circular hole is a trapezoidal structure, and the hole diameter gradually decreases from the inside to the outside.

3. The tail structure of the glass fiber reinforced plastic pipe winding mold according to claim 1, characterized in that: The ejector pin (5) has a spindle-shaped structure, and a groove with an inverted trapezoidal structure is provided in the middle of the ejector pin (5).

4. The tail structure of the glass fiber reinforced plastic pipe winding mold according to claim 1, characterized in that: The ball (8) is made of high-carbon chromium steel, and the diameter of the ball (8) is larger than the outer diameter of the circular hole and smaller than the inner diameter of the circular hole.

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