CN214448119U

CN214448119U - Plug flaring die of steel strip reinforced corrugated pipe

Info

Publication number: CN214448119U
Application number: CN202120186269.9U
Authority: CN
Inventors: 兰福进
Original assignee: Chongqing Wulian Industrial Co ltd
Current assignee: Chongqing Wulian Industrial Co ltd
Priority date: 2021-01-22
Filing date: 2021-01-22
Publication date: 2021-10-22
Anticipated expiration: 2031-01-22

Abstract

The utility model discloses a plug flaring mould of steel band reinforcing bellows in the bellows production facility field, including die holder and mold core, the die holder middle part is equipped with the die cavity that runs through, the mold core is worn to establish in the die cavity from the back to the front, the front end of die holder is installed and is encircleed die cavity open-ended clamp plate, be equipped with the connection structure who is used for fixing a position the bellows tip on the clamp plate, from the back to preceding processing in proper order has the groove of moulding plastics on the die cavity inner wall, end plate groove and constant head tank, the groove and end plate groove intercommunication of moulding plastics, interval less than or equal to 4cm between constant head tank and the end plate groove, the mold core is the ladder cylindricly, the mold core includes from the back to preceding seal section and the shaping section that the diameter reduces in proper order, the one end that the shaping section deviates from the seal section is equipped with the guide section, the diameter of seal section is the same with the internal diameter of die cavity. The utility model is used for the connecting plug of injection moulding steel band reinforcing bellows carries out convenient connection to there is complex operation, the big problem of intensity of labour in solving prior art and adopting the thermal shrinkable sleeve to connect the bellows.

Description

Plug flaring die of steel strip reinforced corrugated pipe

Technical Field

The utility model relates to a bellows production facility field, concretely relates to plug flaring mould of steel band reinforcing bellows.

Background

The forming device of the steel strip reinforced polyethylene spiral corrugated pipe connecting part is rapidly popularized all over the country with the outstanding advantages of high ring stiffness, less material consumption and low cost. The forming device of the steel strip reinforced polyethylene spiral corrugated pipe connecting part is formed by pressing a continuous steel strip into an approximately inverted V-shaped spiral steel rib, winding the spiral steel rib between inner and outer layers of hot-melt polyethylene, and performing spiral saw cutting after the required length is reached, so that two spiral notches are formed at two ends of a pipe, which brings inconvenience to the connection of the forming device of the steel strip reinforced polyethylene spiral corrugated pipe connecting part. To the connection of steel band reinforcing polyethylene helical bellows among the prior art, adopt to cup joint the pyrocondensation cover at laying the scene and connect more, establish the pyrocondensation cover at the tip cover after concrete laying the bellows, then insert the pyrocondensation cover with another bellows, two bellows heat the pyrocondensation cover after the concatenation in the pyrocondensation cover for the pyrocondensation cover softens shrink laminating at the tip of two bellows, accomplishes the articulate of two bellows. Such connected mode utilizes the pyrocondensation cover of heating to connect, and it is strong to connect the leakproofness, nevertheless the operation is comparatively loaded down with trivial details, needs long-time heating just can accomplish the softening of pyrocondensation cover to one side that the in-process of laying is pressed close to ground needs additionally dig a hole underground and just can be convenient for heat the bottom at connection position, and intensity of labour is big, and connection efficiency is low.

SUMMERY OF THE UTILITY MODEL

The utility model provides a plug flaring mould of steel band reinforcing bellows for the connecting plug of injection moulding steel band reinforcing bellows carries out convenient connection, has complex operation, the big problem of intensity of labour in order to solve prior art and adopt pyrocondensation cover to connect the bellows.

In order to achieve the above purpose, the basic technical scheme of the utility model is as follows: the utility model provides a plug flaring die of steel band reinforcing bellows, including die holder and mold core, the die holder middle part is equipped with the die cavity that runs through, the mold core is worn to establish in the die cavity to the front from the back, the front end of die holder is installed and is encircleed die cavity open-ended clamp plate, be equipped with the connection structure who is used for fixing a position the bellows tip on the clamp plate, from the back to preceding processing in proper order has the groove of moulding plastics on the die cavity inner wall, end plate groove and constant head tank, the groove of moulding plastics communicates with the end plate groove, interval less than or equal to 4cm between constant head tank and the end plate groove, the mold core is the ladder cylindricly, the mold core includes from the back to preceding seal segment and the shaping section that the diameter reduces in proper order, the one end that the shaping section deviates from the seal segment is equipped with the guide section, the diameter of seal segment is the same with the internal diameter of die cavity.

The principle and the advantages of the scheme are as follows: during practical application, the mold core is inserted into the mold cavity of the mold base, the length of the sealing section is equal to the distance between the end plate groove and the rear end face of the mold base, the sealing section is attached to the inner wall of the mold cavity to seal the rear end of the mold cavity, the space between the forming section and the inner wall of the mold cavity is used as a forming cavity, forming raw materials enter the end plate groove from the injection molding groove and then extend to the whole forming cavity, and positioning ribs are formed in the positioning grooves to facilitate positioning of the sealing ring in the using process. The end part of the corrugated pipe is inserted into the inner side of the pressing plate and is supported by the guide section, the connecting structure on the pressing plate positions the end part of the corrugated pipe and seals the forming cavity, and the injection molding forming raw material is solidified and formed at the end part of the corrugated pipe in the forming cavity. The plug structure who moulds plastics is formed at the tip of bellows after the shaping, and plug tip has the toper to lead the end plate, forms the draw-in groove of installation sealing washer between toper direction end plate and the location muscle, and the width of draw-in groove is suitable for the sealing washer of multiple model, and the leakproofness of guarantee connection position is higher. The location muscle also carries out the structure to the plug simultaneously and strengthens, and the plug is connected with the reliable and stable hot melt of bellows, is convenient for use with supporting holding the head cooperation, only needs the cartridge can accomplish the convenient connection of steel band reinforcing bellows, need not prepare firing equipment, dig the pit and heat the bottom etc. solve prior art and adopt pyrocondensation cover connection bellows to have complex operation, problem that intensity of labour is big.

Further, the die holder includes mould and lower mould, all processes the runner on the die joint of mould and lower mould, runner and the groove intercommunication of moulding plastics are equipped with a plurality of injection molding holes that are annular evenly distributed between groove and the end plate groove of moulding plastics. The upper die and the lower die are preferably adopted to facilitate demolding after molding, the mode that the upper die and the lower die are both provided with runners and filled with materials is adopted, so that excess materials after injection molding can be conveniently removed through parting surfaces, injection molding holes are used as channels for directly providing molding raw materials for molding cavities, the molding raw materials are uniformly distributed in the injection molding process by adopting annular uniform distribution, the flowing is smooth, the bearing head after molding is guaranteed to be free of defects, and the structural strength is high.

Furthermore, the end plate groove is a conical groove with a small diameter end facing the injection molding groove and a large diameter end facing the positioning groove. The plug end part formed after injection molding is preferably in a taper sleeve shape, and the structure of the plug end part is more conveniently, accurately and smoothly inserted into a matched socket in the connection and use process of the steel strip reinforced corrugated pipe, so that the convenient operation of socket connection is facilitated.

Furthermore, at least one annular reinforcing groove is arranged on the inner wall of the die cavity between the positioning groove and the pressing plate. The annular reinforcing rib can be formed on the formed plug through the design of the reinforcing groove preferably, so that the plug is higher in structural strength and higher in load bearing capacity, is not easy to be extruded and damaged in the using process, and ensures the stability and reliability of corrugated pipe connection.

Further, the clamp plate is connected to the die holder through bolts, the clamp plate is divided into two halves by the parting surface between the upper die and the lower die, the surface of the clamp plate departing from the die holder extends forwards to form a circular positioning plate, the front end of the positioning plate is spiral, and the spiral end of the positioning plate is provided with a positioning groove for positioning the wave crest of the corrugated pipe. As the preferable pressing plate adopts a split structure, the use is more convenient, the spiral front end of the positioning plate is matched with the spiral end part of the corrugated pipe, the positioning groove is matched with the wave crest at the end part of the corrugated pipe, the corrugated pipe adopts a rotary advancing mode during connection, the connection positioning is accurate, and the connection is stable and reliable.

Furthermore, the front end of the positioning plate is integrally formed with a flange turned inwards. As the optimization can effectively seal the forming cavity after being connected through the flange on the one hand, the stable forming of the plug is ensured, on the other hand, the auxiliary positioning of the corrugated pipe connection can be realized through the contact of the flange and the wave crest of the corrugated pipe, and the stable and accurate connection is ensured.

Furthermore, the middle part of the guide section of the mold core is provided with a connecting hole penetrating through the mold core, the end part of the guide section outside the connecting hole is provided with a plurality of threaded holes, and the threaded holes are uniformly distributed outside the connecting hole in an annular shape. As the preferred mold core is coaxially connected with the corrugated pipe, the connecting holes and the connecting grooves are used for connecting additional propelling equipment such as a hydraulic cylinder and the like, so that the connection stability and the stress uniformity are ensured during use, and the mold core can stably move transversely to complete mold closing or demolding.

Drawings

Fig. 1 is a side view of an embodiment of the present invention;

FIG. 2 is a side view of a mold core in an embodiment of the present invention;

fig. 3 is a top view of the lower mold in the embodiment of the present invention;

fig. 4 is a longitudinal sectional view of the die holder according to the embodiment of the present invention.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the die comprises a die holder 1, a pressing plate 2, a positioning plate 3, a flange 31, a positioning groove 32, a die core 4, a sealing section 41, a forming section 42, a guiding section 43, a connecting hole 44, a flow channel 5, an injection molding groove 6, an injection molding hole 7, an end plate groove 8, a reinforcing groove 9, a limiting groove 10, an upper die 11 and a lower die 12.

The embodiment is basically as shown in the attached figure 1: the plug flaring die for the steel strip reinforced corrugated pipe comprises a die holder 1 and a die core 4, wherein a through die cavity is formed in the middle of the die holder 1, and the die core 4 penetrates through the die cavity from back to front. Referring to fig. 4, the die holder 1 includes an upper die 11 and a lower die 12, and the parting surfaces of the upper die 11 and the lower die 12 are respectively provided with a runner 5. The injection molding groove 6, the end plate groove 8, the limiting groove 10 and the reinforcing groove 9 are sequentially processed on the inner wall of the mold cavity from left to right, the injection molding groove 6 is communicated with the end plate groove 8, the distance between the limiting groove 10 and the end plate groove 8 is less than or equal to 4cm, and the distance between the limiting groove 10 and the reinforcing groove 9 is greater than the distance between the limiting groove 10 and the end plate groove 8. The end plate groove 8 is a tapered groove with a small diameter end facing the injection groove 6 and a large diameter end facing the positioning groove 32. The runner 5 is communicated with the injection molding groove 6, and four injection molding holes 7 which are uniformly distributed in an annular shape are communicated between the injection molding groove 6 and the end plate groove 8. The right end of the die holder 1 is provided with a pressing plate 2 surrounding an opening of the die cavity through bolts, the parting surface between the upper die 11 and the lower die 12 of the pressing plate 2 is divided into two halves, and the pressing plate 2 is provided with a connecting structure used for positioning the end part of a corrugated pipe. As shown in fig. 3, the surface of the pressing plate 2 facing away from the die holder 1 extends forward to form a circular positioning plate 3, the front end of the positioning plate 3 is spiral, a positioning groove 32 for positioning a wave peak of the corrugated pipe is machined at the spiral end of the positioning plate 3, and a flange 31 folded inward is integrally formed at the front end of the positioning plate 3. Referring to fig. 2, the mold core 4 is in a stepped cylindrical shape, the mold core 4 includes a sealing section 41 and a forming section 42, the diameters of which are sequentially reduced from left to right, a guiding section 43 is disposed at one end of the forming section 42 away from the sealing section 41, the diameter of the sealing section 41 is the same as the inner diameter of the mold cavity, and the length of the sealing section 41 is equal to the distance between the end plate groove 8 and the left side wall of the mold base 1.

The end part of the guide section 43 of the mold core 4 is rounded, the middle part of the guide section 43 is provided with a connecting hole 44 penetrating through the mold core 4, the end part of the guide section 43 outside the connecting hole 44 is provided with four threaded holes, and the threaded holes are uniformly distributed outside the connecting hole 44 in an annular shape.

The specific implementation process is as follows: when the plug at the end part of the steel strip reinforced corrugated pipe is processed, the upper die 11 is driven by hydraulic equipment to be separated from the lower die 12, then the hydraulic rod penetrates through the connecting hole 44 and is connected with the threaded hole at the end part of the guide section 43 through a flange and a bolt, so that the hydraulic rod can drive the die core 4 to transversely move into and out of the die cavity. The steel strip reinforced corrugated pipe to be processed is moved to the inner side of the pressing plate 2 of the die holder 1, the spiral end part of the steel strip reinforced corrugated pipe is matched with the spiral end part of the positioning plate 3, and the wave crest at the end part of the steel strip reinforced corrugated pipe is inserted into the positioning groove 32 to complete the end part positioning connection of the steel strip reinforced corrugated pipe. Then, the hydraulic rod drives the mold core 4 to move towards the inside of the steel strip reinforced corrugated pipe, the guide section 43 of the mold core 4 is inserted into the steel strip reinforced corrugated pipe, the forming section 42 is positioned in the mold cavity between the pressure plate 2 and the end plate groove 8, and the sealing section 41 is positioned on the left side of the end plate groove 8 and shields the injection molding groove 6. The upper die 11 is buckled on the lower die 12 to complete die assembly of the die, the left end of a die cavity is sealed through a sealing section 41 of a die core 4 after die assembly, the right end of the die cavity is sealed through the spiral end part of the steel strip reinforced corrugated pipe and a flange 31 on a positioning plate 3, a runner 5 is communicated with an injection molding groove 6, an injection molding hole 7 and an end plate groove 8 form an injection molding channel, heated plastic is injected into the runner 5 through an externally arranged injection molding machine, a conical end plate is formed in the end plate groove, positioning ribs are formed in a limiting groove, reinforcing ribs are formed in a reinforcing groove, the end part formed after cooling is provided with the conical end plate, the surface is provided with the positioning ribs, the injection molding plug of the reinforcing ribs, and the injection molding plug is tightly connected with the spiral end part of the steel strip reinforced corrugated pipe. In the use process of a subsequent steel band reinforced corrugated pipe, a sealing ring is sleeved in a clamping groove between a positioning rib and an end plate, the sealing ring with a T-shaped section is preferably selected, a plug is inserted into a matched bearing head processed on the steel band reinforced corrugated pipe, the conical end plate guides the insertion process, the sealing ring is extruded to block a gap between the plug and the bearing head to complete sealing after the plug enters the bearing head, the socket connection of the two steel band reinforced corrugated pipes can be conveniently and efficiently completed only through axial insertion, the operation is simple and convenient, and the connection is stable and reliable.

The foregoing is merely an example of the present invention and common general knowledge in the art of known specific structures and/or features has not been set forth herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. The utility model provides a plug flaring die of steel band reinforcing bellows which characterized in that: including die holder and mold core, the die holder middle part is equipped with the die cavity that runs through, the mold core is worn to establish in the die cavity from the back to the front, the front end of die holder is installed and is encircleed die cavity open-ended clamp plate, is equipped with the connection structure who is used for fixing a position the bellows end portion on the clamp plate, and from the back to preceding processing in proper order has the groove of moulding plastics, end plate groove and constant head tank on the die cavity inner wall, and the groove of moulding plastics and end plate groove intercommunication, interval less than or equal to 4cm between constant head tank and the end plate groove, the mold core is the ladder cylindricly, and the mold core includes from the back to preceding diameter reduces in proper order sealing section and shaping section, and the one end that the shaping section deviates from the sealing section is equipped with the guide section, and the diameter of sealing section is the same with the internal diameter of die cavity.

2. The plug flaring die for steel strip reinforced corrugated pipe according to claim 1, wherein: the die holder includes mould and lower mould, all processes the runner on the die joint of mould and lower mould, the runner with the groove intercommunication of moulding plastics is equipped with a plurality of injection molding holes that are annular evenly distributed between groove and the end plate groove of moulding plastics.

3. The plug flaring die for steel strip reinforced corrugated pipe according to claim 2, wherein: the end plate groove is a conical groove with a small diameter end facing the injection molding groove and a large diameter end facing the positioning groove.

4. The plug flaring die for steel strip reinforced corrugated pipe according to claim 3, wherein: and at least one annular reinforcing groove is formed in the inner wall of the die cavity between the positioning groove and the pressing plate.

5. The plug flaring die for steel strip reinforced corrugated pipe according to claim 4, wherein: the clamp plate bolted connection is on the die holder, and the clamp plate is divided into two halves with last mould, lower mould die joint face, and the surface that the clamp plate deviates from the die holder extends forward and forms annular locating plate, and the front end of locating plate is the heliciform, and the spiral tip processing of locating plate has the constant head tank that is used for the location bellows crest.

6. The plug flaring die for steel strip reinforced corrugated pipe according to claim 5, wherein: the front end of the positioning plate is integrally formed with a flange turned inwards.

7. The plug flaring die for steel strip reinforced corrugated pipe of claim 6, wherein: the middle part of the guide section of the mold core is provided with a connecting hole penetrating through the mold core, the end part of the guide section outside the connecting hole is provided with a plurality of threaded holes, and the threaded holes are uniformly distributed outside the connecting hole in an annular shape.