CN107336426B

CN107336426B - PVDF return bend mold core

Info

Publication number: CN107336426B
Application number: CN201710689812.5A
Authority: CN
Inventors: 杨强; 彭嗣麒; 周铁磊
Original assignee: Yueyang Goaland Energy Saving Equipment Manufacturing Co ltd
Current assignee: Yueyang Goaland Energy Saving Equipment Manufacturing Co ltd
Priority date: 2017-08-14
Filing date: 2017-08-14
Publication date: 2023-02-28
Anticipated expiration: 2037-08-14
Also published as: CN107336426A

Abstract

The utility model provides a novel PVDF return bend mold core, it includes the mould core pole, mold core pole one end is connected with the support, be provided with strutting arrangement on the support terminal surface, strutting arrangement includes a plurality of ball units that connect gradually, it is articulated each other between a plurality of ball units, the ball unit includes ball, supporting seat, the supporting seat sets up both ends about the ball, and both connect through the pivot. The invention aims to provide a novel PVDF elbow mold core, which is easy to draw out after the elbow is finished, is not easy to scratch the inner wall of a PVDF pipe and improves the production efficiency and quality.

Description

PVDF elbow pipe mold core

Technical Field

The invention belongs to the field of PVDF pipe processing, and particularly relates to a PVDF bent pipe mold core.

Background

PVDF pipes are widely used in various industrial equipment, buildings and electrical equipment; the PVDF pipe must be bent to a proper angle according to the pipeline direction, arrangement requirements, and the like. The known pipe bending process is that a pipe bending mold core penetrates into a PVDF pipe, then the PVDF pipe and the pipe bending mold core are simultaneously preheated, after preheating is finished, the PVDF pipe and the pipe bending mold core are loaded into a pipe bending mold together to finish pipe bending, so that the ovality of the PVDF pipe after pipe bending is not over standard; and after the pipe bending is finished, the pipe bending mold core is drawn out from the PVDF pipe.

The common elbow mold core adopts a high-temperature steam hose, and a metal corrugated hose is arranged in the high-temperature steam hose to support the high-temperature steam hose and the PVDF pipe so as to prevent deformation. The pipe bending mold core has the advantages of high cost, short service life and difficult purchase, and the pipe bending mold core is difficult to be drawn out from the PVDF pipe after pipe bending is finished, so that the production efficiency is reduced; and the inner wall of the PVDF pipe is easily scratched in the process of extracting the pipe bending mold core, so that poor production is caused.

Disclosure of Invention

The invention aims to solve the problems and provides a PVDF elbow mold core which is easy to draw out after elbow forming, is not easy to scratch the inner wall of a PVDF pipe, improves the production efficiency and quality and reduces the cost.

In order to realize the purpose, the invention adopts the technical scheme that: the die core rod comprises a die core rod (1), wherein one end of the die core rod (1) is connected with a support (2), and the other end of the die core rod is provided with a holding handle (19); the die core rod (1) and the support (2) are preferably cylindrical, a supporting device is arranged on the end face of the support (2), the supporting device comprises a plurality of ball units (3) which are connected in sequence, and the ball units (3) are hinged with each other; the PVDF pipe is characterized in that the ball unit (3) extends into the PVDF pipe, the ball unit (3) comprises balls (4) and supporting seats (5), the diameter of each ball (4) is larger than that of the mold core rod (1) and the support (2), the supporting seats (5) are arranged at the left end and the right end of each ball (4), and the ball units and the supporting seats are connected through a rotating shaft (6).

Furthermore, a connecting rod (7) is arranged on the outer end face of the supporting seat (5), one end of the connecting rod (7) extends out of the supporting seat (5), the connecting rod (7) is movably connected with the supporting seat (5) of the front ball unit (3) through a pin shaft (8), and the connected ball unit (3) can rotate around the pin shaft (8).

Furthermore, the number of the balls (4) is two, and the distance between the outer end faces of the upper ball and the lower ball (4) is larger than the diameters of the mold core rod (1) and the support (2).

Furthermore, the ball (4) is a conical ball, and the diameter of the circular rings at the two ends of the ball (4) is smaller than that of the middle circular ring.

Furthermore, in order to prolong the service life, the core bar (1) and the support (2) are made of high-temperature-resistant materials, preferably stainless steel.

Furthermore, the outer side end of the supporting seat (5) and the inner side end of the connecting rod (7) are provided with grooves (9) which are matched with each other.

Furthermore, an external thread (10) is arranged on the mold core rod (1), and a baffle (11) is connected to the mold core rod (1) in a threaded manner.

Furthermore, in order to accurately know the distance of the mold core rod extending into the PVDF pipe, the mold core rod (1) is provided with scale marks.

Further, supporting seat (5) include fixing base (12) and sliding seat (13), sliding seat (13) set up in fixing base (12) both ends, be provided with mounting hole (14) that are used for fixed rotating shaft (6) on sliding seat (13), sliding seat (13) side is provided with regulating plate (15), regulating plate (15) on both ends sliding seat (13) stack up the setting from top to bottom, fixing base (12) medial extremity is equipped with spacing groove (16), regulating plate (15) stretch into in spacing groove (16), be provided with through-hole (17) of rectangular shape on regulating plate (15), it has adjusting bolt (18) that are used for locking regulating plate (15) to pass in through-hole (17), the screw rod end of adjusting bolt (18) is fixed on fixing base (12).

The invention has the beneficial effects that: the PVDF pipe is supported by utilizing the movably connected ball unit to replace a high-temperature steam hose, and the rolling friction replaces the existing sliding friction, so that the bent pipe is easy to draw out after being formed and is not easy to scratch the inner wall of the PVDF pipe, and the production efficiency and the quality are improved; adopt ball unit, its long service life saves the cost of enterprise.

1. Utilize a plurality of ball units to support the PVDF pipe, and the ball on the ball unit is the toper ball, the inner wall that provides that can be better supports, guarantees that the ellipticity after the PVDF pipe is bent does not exceed standard.

2. The sliding seat can stretch out according to the diameter of the PVDF pipe inner pipe to adjust the distance between the two balls, and the applicability of the elbow mold core is improved.

3. The baffle can rotate on the mold core rod and move up and down, and the depth of the ball unit extending into the PVDF pipe is clearly known through the scale marks.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic view of the ball unit connection.

Fig. 3 is a schematic structural view of the ball unit.

FIG. 4 is a schematic structural view of an inner end surface of the support base.

The text labels in the figures are represented as: 1. a mandrel bar; 2. a support; 3. a ball unit; 4. a ball bearing; 5. a supporting seat; 6. a rotating shaft; 7. a connecting rod; 8. a pin shaft; 9. a groove; 10. an external thread; 11. a baffle plate; 12. a fixed seat; 13. a sliding seat; 14. mounting holes; 15. an adjusting plate; 16. a limiting groove; 17. a through hole; 18. adjusting the bolt; 19. and (4) holding the handle.

Detailed Description

The following detailed description of the present invention is given for the purpose of better understanding technical solutions of the present invention by those skilled in the art, and the present description is only exemplary and explanatory and should not be construed as limiting the scope of the present invention in any way.

As shown in fig. 1 to 4, the specific structure of the present invention is: the die core rod comprises a die core rod 1, wherein one end of the die core rod 1 is connected with a support 2, and the other end of the die core rod is provided with a holding handle 19; the end face of the support 2 is provided with a supporting device, the supporting device comprises a plurality of ball units 3 which are sequentially connected, and the ball units 3 are hinged with each other; the ball unit 3 comprises a ball 4 and a support seat 5, wherein the support seat 5 is arranged at the left end and the right end of the ball 4 and is connected with the ball through a rotating shaft 6.

Preferably, the support base 5 is provided with a connecting rod 7, and the connecting rod 7 is movably connected with the support base 5 of the front ball unit through a pin 8.

Preferably, the number of the balls 4 is two at intervals.

Preferably, the ball 4 is a tapered ball, and the diameter of the circular rings at the two ends of the ball 4 is smaller than that of the middle circular ring.

Preferably, the core bar 1 and the support 2 are made of stainless steel.

Preferably, the outer side end of the support seat 5 and the inner side end of the connecting rod 7 are provided with matched grooves 9.

Preferably, the core bar 1 is provided with an external thread 10, and the core bar 1 is in threaded connection with a baffle 11.

Preferably, the mandrel bar 1 is provided with scale marks.

Preferably, the supporting seat 5 includes a fixing seat 12 and a sliding seat 13, the sliding seat 13 is arranged at two ends of the fixing seat 12, a mounting hole 14 for fixing the rotating shaft 6 is formed in the sliding seat 13, an adjusting plate 15 is arranged at the side end of the sliding seat 13, the adjusting plate 15 on the sliding seat 13 at two ends is vertically stacked, a limiting groove 16 is formed in the inner side end of the fixing seat 12, the adjusting plate 15 extends into the limiting groove 16, a through hole 17 with a long strip shape is formed in the adjusting plate 15, an adjusting bolt 18 for locking the adjusting plate 15 is arranged in the through hole 17 in a penetrating mode, and the tail end of a screw rod of the adjusting bolt 18 is fixed on the fixing seat 12.

The concrete during operation: adjusting the number of the ball units 3 according to requirements, pushing the whole ball unit 3 into the PVDF pipe, enabling the cambered surfaces of the balls 4 at the upper end and the lower end to be matched with the inner wall of the PVDF pipe in shape, holding the holding handle 19 to adjust the mandrel bar 1, and enabling the balls 4 to support the PVDF pipe to prevent deformation; after the bent pipe is formed, the ball unit 3 is drawn out.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. The foregoing is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes may be made without departing from the principle of the present invention, and the technical features described above may be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments.

Claims

1. The PVDF elbow mold core is characterized by comprising a mold core rod (1), wherein one end of the mold core rod (1) is connected with a support (2), and the other end of the mold core rod is provided with a holding handle (19); the end face of the support (2) is provided with a supporting device, the supporting device comprises a plurality of ball units (3) which are sequentially connected, and the ball units (3) are hinged with each other; the ball unit (3) comprises balls (4) and two supporting seats (5), the balls (4) are arranged at intervals up and down, the supporting seats (5) are arranged at the left end and the right end of the balls (4) and are connected through a rotating shaft (6); supporting seat (5) are including fixing base (12) and sliding seat (13), sliding seat (13) set up in fixing base (12) both ends, be provided with mounting hole (14) that are used for fixed rotating shaft (6) on sliding seat (13), sliding seat (13) side is provided with regulating plate (15), and regulating plate (15) on sliding seat (13) of both ends stack up the setting from top to bottom, fixing base (12) medial extremity is equipped with spacing groove (16), regulating plate (15) stretch into in spacing groove (16), be provided with through-hole (17) of rectangular shape on regulating plate (15), it has adjusting bolt (18) that are used for locking regulating plate (15) to pass in through-hole (17), the screw rod end of adjusting bolt (18) is fixed on fixing base (12).

2. The PVDF elbow mold core according to claim 1, wherein a connecting rod (7) is arranged on the supporting seat (5), and the connecting rod (7) is movably connected with the supporting seat (5) of the front ball unit through a pin shaft (8).

3. A PVDF elbow mould core according to claim 1, wherein the balls (4) are conical balls, and the diameter of the rings at the two ends of the balls (4) is smaller than that of the middle ring.

4. The PVDF elbow mold core according to claim 1, wherein the core rod (1) and the support (2) are made of stainless steel.

5. A PVDF elbow mould core according to claim 1, characterised in that the outer ends of the support base (5) and the inner ends of the connecting rods (7) are provided with matching grooves (9).

6. A PVDF elbow mould core according to claim 1, wherein the core rod (1) is provided with an external thread (10), and the core rod (1) is screwed with a baffle (11).

7. The PVDF elbow mold core according to claim 1, wherein the core rod (1) is provided with scale marks.