CN112477084A

CN112477084A - Diameter-variable core mould

Info

Publication number: CN112477084A
Application number: CN202011162559.6A
Authority: CN
Inventors: 吕召军; 陈鹏; 王雪; 王佳佳; 李兴维; 曲东东
Original assignee: Weihai Hongtong Piping Materials Co ltd
Current assignee: Weihai Hongtong Piping Materials Co ltd
Priority date: 2020-10-27
Filing date: 2020-10-27
Publication date: 2021-03-12

Abstract

The invention provides a variable-diameter core die which is provided with a rotating shaft, a shifting fork is fixedly connected with the rotating shaft, a sliding block seat is sleeved on the outer circumference of the rotating shaft, a boss is arranged on the sliding block seat, a rotary table is sleeved on the outer circumference of the boss, and the rotary table is fixedly connected with the tail end of the shifting fork; the side surface of the sliding block seat is radially provided with a plurality of sliding grooves, sliding blocks are arranged in the sliding grooves, arc-shaped racks are arranged on the sliding blocks, a rack groove is formed between every two adjacent arc-shaped racks, the rotary table is provided with a spiral rack, the spiral rack is meshed with the rack groove, and the sliding blocks radially move along the sliding grooves under the action of rotary motion of the rotary table; one end of the slide block is fixedly connected with a core mold sleeve, the core mold sleeve is uniformly distributed on the outer circumference of the rotating shaft, and when the core mold sleeve is completely opened, the core mold sleeve on the outer circumference of the rotating shaft is combined into a cylinder shape. The invention has simple structure and convenient operation, rotates the rotating shaft to drive the rotating disc to rotate, drives the sliding block to move radially, and drives the core die sleeve to open and contract, thereby finishing the change of the diameter of the outer circumference of the core die sleeve and facilitating the demoulding of the pipe.

Description

Diameter-variable core mould

Technical Field

The invention relates to the technical field of pipe production lines, in particular to a diameter-variable core die.

Background

At present, most of moulds have invariable diameters, and after braided fabrics such as fibers are wound outside a core mould, the inner diameter of the pipe is the same as the outer diameter of the core mould, so that demoulding is very difficult under the winding force of the braided fabrics. At present, most methods for changing the diameter of a core mold are elastic changes, such as air bag inflation and air exhaust, material thermal expansion and cold contraction and the like, but the methods cannot accurately guarantee the change value of the diameter, the diameter error is large, the uniformity of winding force in all directions cannot be guaranteed when a fiber braided fabric is wound, the defects of protrusion, depression, wrinkles and the like are easy to occur, the fiber is not uniformly stretched, and the product performance is influenced due to the weak points of a pipe body.

Disclosure of Invention

The invention aims to solve the defects of the technology and provide a core mould which has a simple structure and can change the diameter rapidly.

Therefore, the invention provides a variable-diameter core die which is provided with a rotating shaft, wherein a plurality of groups of variable-diameter structures are arranged on the outer circumference of the rotating shaft, each variable-diameter structure comprises a shifting fork, a sliding block seat, a rotating disc, a sliding block and a die sleeve, the shifting fork is fixedly connected with the rotating shaft, the sliding block seat is sleeved on the outer circumference of the rotating shaft, a boss is arranged on the sliding block seat, the rotating disc is sleeved on the outer circumference of the boss, and the rotating disc is fixedly connected with the. The side of slider seat is equallyd divide radially along its circumferencial direction and is equipped with the several spout, is equipped with the slider in the spout, and the slider is equipped with the arc rack, is equipped with the rack groove between two adjacent arc racks, and the carousel is equipped with the spiral rack, and the meshing that cooperatees of spiral rack and rack groove, under the carousel rotary motion effect, the slider is along spout radial motion. One end of the slide block is fixedly connected with a core mold sleeve, the core mold sleeve is uniformly distributed on the outer circumference of the rotating shaft, and when the core mold sleeve is completely opened, the core mold sleeve on the outer circumference of the rotating shaft is combined into a cylinder shape.

Preferably, the diameter-variable structure is provided with three groups, the number of the slide block seats is three, each slide block seat corresponds to three slide blocks, nine slide blocks are arranged on the core die sleeve in total, and the nine slide blocks are arranged on the outer circumference of the rotating shaft in a staggered mode, so that the connected core die sleeve forms a cylindrical shape when being opened.

Preferably, a fixed sleeve is fixedly connected between two adjacent slider seats.

Preferably, a deep groove ball bearing is arranged between the slider seat and the rotating shaft.

Preferably, a thrust bearing is further arranged between the slider seat and the rotating shaft.

Preferably, one end of the rotating shaft is also provided with a wrench.

The invention provides a diameter-variable core mould, which has the following beneficial effects:

the invention is provided with a rotating shaft, the rotating shaft is connected with a shifting fork, a sliding block seat is sleeved on the outer circumference of the rotating shaft, a rotating disc is sleeved on the sliding block seat, and the rotating disc is fixedly connected with the shifting fork. The side of the sliding block seat is radially provided with a sliding groove, a sliding block is arranged in the sliding groove, the sliding block is provided with arc-shaped racks, a rack groove is formed between every two adjacent arc-shaped racks, the rotary table is provided with a spiral rack, the spiral rack is meshed with the rack groove, and the tail end of the sliding block is further connected with a core die sleeve. When the rotating shaft rotates to drive the shifting fork to rotate, the shifting fork drives the rotating disc to rotate, the rotating disc drives the sliding block to move radially, the sliding block drives the core mold sleeve to open, the fiber braided fabric starts to wind outside the core mold sleeve after the core mold sleeve is combined into a cylindrical shape, because the cross section of the core mold sleeve is circular and does not deform, the winding force of the fibers in all directions is uniform, the defects of protrusion, depression, wrinkles and the like cannot occur, the fibers are uniformly stretched, and the performance of the wound fiber pipe body is good. When the fiber pipe is wound, the rotating shaft is rotated reversely, so that the diameter of the core mold sleeve is reduced, and smooth demolding between the fiber pipe and the core mold sleeve is completed.

The invention has simple structure and convenient operation, the core die sleeve adopts a multi-petal structure, the stroke and the number of the slide blocks can be adjusted according to the actual requirement, and the variable diameter quantity is controlled by matching with the number and the clearance of the core die sleeve; the sliding block seats are connected into a whole by the fixing sleeve, so that the sliding block seats have enough rigidity and ensure the concentricity and uniformity of radial movement of the core die sleeve; and a thrust bearing is also arranged between the rotating shaft and the sliding block seat, so that the large axial force generated by driving the sliding block to move due to the rotation of the turntable can be borne during use, the damage to each part is reduced, and the service life of the equipment is prolonged.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural diagram of a right side view of the turntable of the present invention;

FIG. 3 is a schematic left side view of the slider housing of the present invention.

The labels in the figure are: 1. the novel gear box comprises a rotating shaft, 2. a shifting fork, 3. a slider seat, 31. a boss, 32. a sliding groove, 4. a rotating disc, 41. a spiral rack, 5. a slider, 51. an arc rack, 52. a rack groove, 6. a core die sleeve, 7. a deep groove ball bearing, 8. a thrust bearing, 9. a wrench and 10. a fixing sleeve.

Detailed Description

The invention is further described below in conjunction with the drawings and the specific embodiments to assist in understanding the contents of the invention. The method used in the invention is a conventional method if no special provisions are made; the raw materials and the apparatus used are, unless otherwise specified, conventional commercially available products.

As shown in fig. 1-3, the present invention provides a variable diameter core mold, which is provided with a rotating shaft 1, and a plurality of groups of variable diameter structures are arranged on the outer circumference of the rotating shaft 1, and each variable diameter structure comprises a shifting fork 2, a sliding block seat 3, a rotating disc 4, a sliding block 5 and a core mold sleeve 6. The shifting fork 2 is fixedly connected with the rotating shaft 1, the extending direction of the shifting fork 2 is parallel to the rotating shaft 1, the outer circumference of the rotating shaft 1 is sleeved with a sliding block seat 3, the sliding block seat 3 is provided with an annular boss 31, the outer circumference of the boss 31 is sleeved with a rotary disc 4, and the rotary disc 4 is fixedly connected with the tail end of the shifting fork 2; when the rotating shaft 1 rotates, the rotating shaft 1 drives the shifting fork 2 to rotate, and the shifting fork 2 drives the turntable 4 to rotate. A plurality of sliding grooves 32 are radially arranged on the side surface of the sliding block seat 3 along the circumferential direction of the sliding block seat, the extending direction of each sliding groove 32 is perpendicular to the extending direction of the rotating shaft 1, a sliding block 5 is arranged in each sliding groove 32, each sliding block 5 is provided with an arc-shaped rack 51, a rack groove 52 is arranged between every two adjacent arc-shaped racks 51, the rotary disc 4 is provided with a spiral rack 41, each spiral rack 41 is a constant-speed spiral line, and each spiral rack 41 is meshed with each rack groove 52 in a matched; under the action of the rotary motion of the rotary disc 4, the slide block 5 moves along the slide groove 32 in the radial direction. One end of the slide block 5 is fixedly connected with a core mold sleeve 6, the core mold sleeve 6 is in a long strip shape, the cross section is arc-shaped, the extending direction of the core mold sleeve is parallel to the extending direction of the rotating shaft 1, the core mold sleeves 6 are uniformly distributed on the outer circumference of the rotating shaft 1, when the core mold sleeves 6 are completely opened along with the movement of the slide block 5, all the core mold sleeves 6 on the outer circumference of the rotating shaft 1 are combined into a cylinder shape, and the cross section of the core mold sleeves 6 is circular.

Furthermore, the diameter-variable structure is provided with three groups, the number of the sliding block seats 3 is three, each sliding block seat 3 corresponds to three sliding blocks 5, nine corresponding core mold sleeves 6 are arranged, and the nine sliding blocks 5 are arranged on the outer circumference of the rotating shaft 1 in a staggered mode, so that the connected core mold sleeves 6 form a cylindrical shape when being opened, the diameter-variable core mold is formed, and winding of fiber pipes is facilitated. The core mould sleeve 6 is of a multi-petal structure, the stroke and the number of the sliding blocks 5 can be adjusted according to actual requirements, the stroke and the number are matched with the number and the gap of the core mould sleeve 6, and the reducing amount is controlled.

Further, a fixed sleeve 10 is fixedly connected between two adjacent slider seats 3 to connect the front and rear slider seats 3 into a whole. The holistic left end of take-up housing 3 is equipped with the retaining ring, and the outer circumference of pivot 1 is located to the retaining ring cover, and the holistic right-hand member of take-up housing 3 is equipped with the nut, nut and pivot 1 spiro union, and when pivot 1 rotated, setting up of retaining ring and nut made take-up housing 3 wholly can not remove along pivot 1, and take-up housing 3 connects into a whole and makes take-up housing 3 wholly have sufficient rigidity, has guaranteed 6 radial motion's of mandrel cover concentricity and unity.

Furthermore, a deep groove ball bearing 7 is arranged between the sliding block seat 3 and the rotating shaft 1, so that the friction force between the rotating shaft 1 and the sliding block seat 3 is reduced when the rotating shaft 1 rotates, and the service life of the device is prolonged.

Further, a thrust bearing 8 is arranged between the slider seat 3 and the rotating shaft 1. The thrust bearing 8 can bear larger axial force generated by the movement of the sliding block 5 driven by the rotation of the turntable 4, reduces the damage of each part and enables the rotating shaft 1 to easily rotate.

Furthermore, one end of the rotating shaft 1 is also provided with a wrench 9, which is convenient for driving the rotating shaft 1 to rotate.

When longer fiber pipes need to be wound, two groups of core die sleeves can be symmetrically arranged at two ends of the fiber pipes according to the length of the fiber pipes needing to be wound, so that the diameters of the wound fiber pipes meet the specification. When the core die sleeve is manufactured, in order to ensure the precision, a plurality of groups of variable-diameter structures are firstly prepared and then assembled, and the rotating shaft 1 is fixedly connected together by using a flange.

The working principle of the invention is as follows:

the spanner 9 is rotated to rotate the rotating shaft 1, the rotating shaft 1 rotates to drive the shifting fork 2 to rotate, the shifting fork 2 rotates to drive the rotating disc 4 to rotate, the rotating disc 4 rotates to drive the sliding block 5 to move along the radial direction of the sliding groove 32, and the core mold sleeve 6 is completely opened to form a cylindrical shape. After the fiber pipe is wound on the outer circumference of the core mold sleeve 6, the wrench 9 is rotated reversely to move the slide block 5 to one side close to the rotating shaft 1, the core mold sleeve 6 is contracted, the diameter is reduced, and the fiber pipe and the core mold sleeve 6 are smoothly demolded by changing the diameter of the core mold, so that the fiber pipe is convenient and fast to use.

In the description of the present invention, it is to be understood that the terms "left", "right", "upper", "lower", "top", "bottom", "front", "rear", "inner", "outer", "back", "middle", and the like, indicate orientations and positional relationships based on those shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

However, the above description is only exemplary of the present invention, and the scope of the present invention should not be limited thereby, and the replacement of the equivalent components or the equivalent changes and modifications made according to the protection scope of the present invention should be covered by the claims of the present invention.

Claims

1. The variable-diameter core die is characterized by being provided with a rotating shaft, a plurality of groups of variable-diameter structures are arranged on the outer circumference of the rotating shaft, each variable-diameter structure comprises a shifting fork, a sliding block seat, a rotary table, a sliding block and a core die sleeve, the shifting fork is fixedly connected with the rotating shaft, the sliding block seat is sleeved on the outer circumference of the rotating shaft, the sliding block seat is provided with a boss, the rotary table is sleeved on the outer circumference of the boss, and the rotary table is fixedly connected with the tail end of the shifting fork; the side surface of the sliding block seat is uniformly and radially provided with a plurality of sliding grooves along the circumferential direction, the sliding blocks are arranged in the sliding grooves, the sliding blocks are provided with arc-shaped racks, a rack groove is formed between every two adjacent arc-shaped racks, the rotary table is provided with a spiral rack, the spiral rack is matched and meshed with the rack groove, and the sliding blocks radially move along the sliding grooves under the action of the rotary motion of the rotary table; one end of the sliding block is fixedly connected with the core mold sleeve, the core mold sleeve is uniformly distributed on the outer circumference of the rotating shaft, and when the core mold sleeve is completely opened, the core mold sleeve on the outer circumference of the rotating shaft is combined into a cylinder shape.

2. The mandrel with the variable diameter as claimed in claim 1, wherein the diameter-variable structure has three sets, the number of the slide holders is three, each slide holder corresponds to three slides, the mandrel sleeve has nine slides, and the nine slides are alternately arranged on the outer circumference of the rotating shaft.

3. The mandrel of claim 1 wherein a retaining sleeve is fixedly attached between adjacent ones of said slide blocks.

4. The mandrel of claim 1 wherein a deep groove ball bearing is disposed between the slider seat and the spindle.

5. The mandrel of claim 1, wherein a thrust bearing is further disposed between the slide holder and the shaft.

6. The mandrel of claim 1, wherein a wrench is further provided at one end of the shaft.