CN207327581U - Plastic tube forming elbow mechanism - Google Patents

Abstract

The utility model discloses a kind of plastic tube forming elbow mechanism, including the bend pipe mould with upper die and lower die, for driving upper mold hold-down devices of the mould direction movement to mold straight down, further include one be across the bend pipe mould both ends across frame, arranged on it is described across on frame and positioned at the lower die both ends for the clamping and fixing device that is gripped to the plastic tube when plastic tube is placed in the lower die, it is movably arranged at described across on frame and for two blockings of closure plastic tube two-port after clamping and fixing device grips the plastic tube, molding bend pipe in bend pipe mould described in the supercharging device being pressurized into the plastic tube and a upward top pressure is blocked by wherein one so that the bend pipe to be ejected to the jack unit of the lower die, the hold-down devices are arranged on described across on frame；It is described to include being erected on the left standing frame of the bend pipe mould left and right ends, right standing frame across frame and be laterally arranged on the left standing frame and the top crossbearer on right standing frame top.

Description

Plastic tube forming elbow mechanism

Technical field

The utility model is related to the bend pipe manufacture field in plastic tube manufacturing process, more particularly to a kind of plastic tube bend pipe into Type mechanism.

Background technology

The processing technology of plastic tube generally comprises raw materials particles stirring, extrusion molding, mould molding, is delivered to vacuum cooled machine Sizing, coding, cutting, then as needed (such as need to add some plastic tubes progress bend pipe in some hot water pipe fields Work) bent, bend pipe etc..Particle stirring is by the raw materials particles (such as PP particles, PE particles etc.) of making plastic tube It is mixed with other addition additives (such as colorant additive etc.)；Particle after stirring is adsorbed to by vacuum adsorption machine In plastic extruding molding machine thermalization extrusion molding and to die for molding be in plastic tube；Then it is delivered to by conveyer inside cooling sizing mill Further sizing shaping, then to coding, cutting in the plastic tube for needing length.Have on the market various to plastic tube progress The equipment of bend pipe processing, machine etc., these equipment easily cause the bending part of plastic tube after bend pipe processing is carried out to plastic tube It is point inconsistent with non-bending part shape or diameter, the shape of plastic tube is influenced, severe patient causes plastic tube undesirable, good Product rate is low etc..

Utility model content

In view of the above shortcomings of the prior art, technical problem to be solved in the utility model is：There is provided one kind can make Bending part is consistent with non-bending part, improves the plastic tube forming elbow mechanism of the yields of plastic tube.

In order to solve the above technical problems, the technical solution that the utility model uses is：A kind of plastic tube bend pipe is provided Shaping mechanism, including the bend pipe mould with upper die and lower die, for driving upper mold mould direction movement straight down to close The hold-down devices of mould, further include one be across the bend pipe mould both ends across frame, arranged on described across on frame and under described Mould both ends for the plastic tube is gripped when plastic tube is placed in the lower die clamping and fixing device, work Move described in being arranged on across on frame and for blocking plastic tube both ends after clamping and fixing device grips the plastic tube The two of mouth block, bending die described in the supercharging device being pressurized into the plastic tube and a upward top pressure are blocked by wherein one The bend pipe to be ejected the jack unit of the lower die by molding bend pipe in tool；It is described to include being erected on the bending die across frame Have the left standing frame, right standing frame and the horizontal top crossbearer arranged on the left standing frame and right standing frame top of left and right ends；The pushing Device is vertically arranged on the top crossbearer, and the lower end of the hold-down devices passes through the top crossbearer with connecting at the top of the upper mold Connect；Described two, which block being arranged on the left standing frame and right standing frame for activity respectively, to be aligned with the corresponding ports of the plastic tube Position at.

Further, the lower die of the bend pipe mould is fixed on the underface of the top crossbearer, the lower mode cavity of the lower die Positioned at the top of the lower die, the top surface of the lower die is in the concave arc surface of downward concave arc, its radian needs curved with the bend pipe The radian of folding matches, length direction downwards recessed formation of the lower mode cavity along the concave arc surface, from the length of the lower die The lower die is run through in degree direction；The cross section of the lower mode cavity is recessed semicircle arcuation.

Further, the top of the upper mold is connected with the hold-down devices on the top crossbearer, can be under described Vertically movable under the driving of pressure device, the bottom surface of the upper mold is the downwardly convex concave arc surface male-female engagement with the lower mode cavity Convex face, the upper cavity of the upper mold opens up upwardly by the convex, and the cross section of the upper cavity is concave up Semicircle arcuation, in the circle that matches with the bend pipe after being molded with the lower die.

Further, the hold-down devices include being arranged on the top crossbearer and lower end through the top crossbearer to be connected to The first hydraulic cylinder of the center position at the top of the upper mold, be actively located on the top crossbearer and respectively positioned at described the First guide rod of one hydraulic cylinder both sides, the vertical top for being connected to the upper mold in the lower end of first guide rod it is corresponding At position.

Further, the clamping and fixing device includes two collets, two arcs folder and for driving two arcs folder vertical Two mobile drive divisions；Two collet, which is respectively arranged on the inboard position corresponding to the plastic tube of two stands and sentences, makes the modeling The both ends of expects pipe can be respectively placed on two collet, and the upper surface of two collet is the lower half side face with the plastic tube The concave arc surface that radian matches；The two arcs folder is in inverted-C or inverted U-shaped, the radian of the lower surface of the two arcs folder Match with the radian of the upper half of the plastic tube, so as to being held on the upper half of the plastic tube；Two drive division It is second hydraulic cylinder, two drive division is arranged on the top crossbearer surface for corresponding to two collets, its drive rod is downward Connected after through the top crossbearer with the top of corresponding arc folder.

Further, two blocking is in the taper of small end inwardly, and institute is corresponded on the left standing frame and right standing frame State and one is respectively equipped with the position of the two-port of plastic tube shelves plate, it is described shelve plate shelve face in recessed cancave cambered surface with more Good is engaged with the blocking.

Further, shelve shelving for plate two and a return spring be respectively arranged with face, one end of two return springs with Corresponding to shelve plate connection, the other end is connected with corresponding block, after the blocking is pulled out the port of the bend pipe, by The restoring force of the return spring is repositioned to described shelve on plate；One is offered in a blocking wherein for the supercharging device The through hole that pressure inlet passes through, the axially penetrate through blocking of the through hole along the blocking, the pressure inlet of the supercharging device penetrate this Through hole.

The plastic tube forming elbow mechanism of the utility model, compared with traditional pipe bending mechanism, traditional pipe bending mechanism energy Enough reduce manual operation, avoid because manual operation power is unstable and caused by pipe bent position be molded poor, the defects such as yields is low, pass through Appropriate compressed air is poured into pipe so that bend pipe can somewhat be expanded and is more bonded with bend pipe mould during shaping, ensure bending effect More preferably, bending part is consistent with non-bending part diameter.

Brief description of the drawings

Fig. 1 is one working state figure of the utility model plastic tube forming elbow mechanism.

Fig. 2 is another working state figure of the utility model plastic tube forming elbow mechanism.

Fig. 3 is the side view of the utility model plastic tube forming elbow mechanism.

Embodiment

The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are without making creative work All other embodiments obtained, shall fall within the protection scope of the present invention.

Fig. 1 to Fig. 3 is referred to, the plastic tube forming elbow mechanism 2 of the utility model, which includes one, has upper mold 201 and lower die 202 bend pipe mould 20, one be used for drive upper mold 201 straight down mould 202 direction movement hold-down devices 22, arranged on described 202 both ends of lower die and for being gripped when plastic tube 300a is placed in the lower die 202 to the plastic tube 300a Clamping and fixing device 24, for blocking plastic tube after clamping and fixing device 24 grips the plastic tube 300a The two of 300a two-ports block 25, are pressurized by wherein one blocking 25 into the plastic tube 300a so that overpressure is more than outer Molding bend pipe is with by the bend pipe 300b in bend pipe mould 20 described in the supercharging device (not shown) of boundary's pressure, a upward top pressure Eject the jack unit 26 of the lower die 202.Wherein, the plastic tube 300a, which is each meant, needs to carry out treating for bend pipe 300b processing Plastic tube 300a, such as PP pipes, PE pipes, PP-R pipes etc. are processed, the bend pipe 300b refers to machined molding shaping bending Pipe.

In the present embodiment, further include the both ends that are across the bend pipe mould 20 across frame 28, the hold-down devices 22, folder Hold fixing device 24, two and block the components such as 25 arranged on described across on frame 28.Described across frame 28 is in lower frame-shaped, including is erected on institute The left standing frame 281, right standing frame 282 and transverse direction for stating the both ends of bend pipe mould 20 are pushed up arranged on the left standing frame 281 and right standing frame 282 The top crossbearer 283 at end, the length direction of the top crossbearer 283 and the plastic tube 300a being placed in the lower mode cavity of the lower die 202 Length direction it is consistent, positioned at the surface of the bend pipe mould 20.It is parallel between the left standing frame 281 and right standing frame 282 Distance and the length of the plastic tube 300a match, and slightly larger than the length of the plastic tube 300a, described two block 25 difference Activity be arranged on two stands on corresponding to the plastic tube 300a two-ports position at, two block 25 inner end respectively with Two-port is aligned, and respectively close to the two-port, (such as is horizontally placed on by the horizontal thrust of inside (to relative direction) Hydraulic cylinder, pneumatic cylinder outside two stands etc.) enable to described two to block 25 respectively to the movement of corresponding port so as to block 25 corresponding ports.

The lower die 202 of the bend pipe mould 20 is fixed on the underface of the top crossbearer 283, the lower die of the lower die 202 Chamber is located at the top of the lower die 202, and the lower mode cavity is in integrally the long arcuation of downward concave arc, its radian is according to different embodiments Plastic tube 300a need the radian that bends and set, just its being restricted property is not described herein.The cross section of the lower mode cavity After recessed semicircle arcuation, with the upper mold 201 molding, in the circle to match with the bend pipe 300b shapes.Specifically, The top surface of the lower die 202 is in the concave arc surface of downward concave arc, the radian phase that its radian is bent with bend pipe 300b needs Match somebody with somebody or unanimously, the lower mode cavity is then along the length direction recessed formation downwards of the concave arc surface, from the length of the lower die 202 The lower die 202 is run through in direction.

The top of the upper mold 201 is connected with the hold-down devices 22 on the top crossbearer 283, can be in the pushing Vertically movable under the driving of device 22, the bottom surface of the upper mold 201 is then to be downwardly convex recessed with the concave arc surface of the lower mode cavity The convex face of convex cooperation, the upper cavity of upper mold 201 are then opened up upwardly by the convex, and the cross section of the upper cavity is Concave up semicircle arcuation, the radian of the upper cavity and the radian of the lower mode cavity match, if make the upper cavity with After lower mode cavity is connected to each other molding, section is in the circle to match with round plastic pipe 300a shapes.

In the present embodiment, the hold-down devices 22 include being arranged on the top crossbearer 283 and lower end passes through the top crossbearer 283 to be connected to the first hydraulic cylinder 221 of the center position at the top of the upper mold 201, be actively located in the top crossbearer It is located on 283 and respectively the first guide rod 222 of 221 both sides of first hydraulic cylinder, the lower end of first guide rod 222 The corresponding position at the vertical top for being connected to the upper mold 201.It should be understood that the hydraulic cylinder can use it is existing Any type hydraulic unit, can drive upper mold 201 to move down so that the upper mold 201 is molded in the lower die 202 And upper mold 201 is set to move up to be molded.The control of the shift motion of the hydraulic stem of the first hydraulic cylinder 221 It is controlled using existing any of which, as long as the shift motion meets that upper mold 201 can be molded just in lower die 202 It is upper, in other examples, it can also use the modes such as air pressure to drive, no longer be described in detail herein.

The clamping and fixing device 24 includes two collets 241, two arcs folder 242 and for driving two arcs folder 242 perpendicular Two drive divisions 243 that translation is moved.Two collet 241 is respectively arranged on two stands inboard (towards the side of plastic tube 300a or phase To side) corresponding to the plastic tube 300a position sentence enable the plastic tube 300a both ends be respectively placed in it is described On two collets 241, the upper surface of two collet 241 is the concave arc to match with the lower half side face radian of the plastic tube 300a Shape face.The two arcs folder 242 is in inverted-C or inverted U-shaped, the radian and the plastics of the lower surface of the two arcs folder 242 The radian of the upper half of pipe 300a matches, so as to being held on the upper half of the plastic tube 300a.Two drive division 243 Be second hydraulic cylinder or pneumatic cylinder, two drive division 243 be arranged on the top crossbearer corresponding to two collets 241 just on Side, its drive rod connect after being passed down through the top crossbearer 283 with the top of corresponding arc folder 242.

Two blocking 25 is in the taper of small end inwardly.Corresponding to described on the left standing frame 281 and right standing frame 282 One is respectively equipped with the position of the two-port of blocking 25 and shelves plate 291, and the face of shelving for shelving plate 291 is in recessed cancave cambered surface It is engaged with more preferable with the blocking 25.Blocking 25 for the ease of two can be certainly after the two-port of the bend pipe 300b is pulled out Be repositioned to it is corresponding shelve on plate 291, shelving shelving for plate 291 two is respectively arranged with a return spring on face, two return bullets One end of spring is connected with corresponding plate 291 of shelving, and the other end blocks 25 connections with corresponding, when the blocking 25 is pulled out institute Behind the port for stating bend pipe 300b, described shelve on plate 291 is repositioned to by the restoring force of the return spring.One block wherein A through hole passed through for the pressure inlet of the supercharging device is offered on 25, the through hole axially penetrates through this along the blocking 25 25 are blocked, the pressure inlet of the supercharging device penetrates the through hole.

In the present embodiment, 25 are blocked for the ease of extracting described two, reduces manual operation, two blocking 25 is oblique by two To the 3rd hydraulic cylinder 211 and fixture 212 come extract it is described two block 25.Specifically, described two slanting 3rd hydraulic cylinder 211 are set up on left standing frame 281 and right standing frame 282 respectively, which is oppositely arranged, its hydraulic stem is towards inner The corresponding ports direction movement of the bend pipe 300b of lower section.The fixture 212 is arranged at the hydraulic stem of the 3rd hydraulic cylinder 211 Effect end, the fixture 212 according to block 25 shapes and design, be not just described in detail one by one herein.When needing to pull up two blockings 25 When, act two the 3rd hydraulic cylinder 211, two hydraulic stems inwards sentence and make two by inclined downward to 25 positions of corresponding blocking Fixture 212 clamps corresponding blocking 25, then makes two the 3rd hydraulic cylinders, 211 return, described to block 25 by return spring Depart from after pulling force in corresponding fixture 212, with return spring, return is shelved on plate 291 in described.

In the present embodiment, the jack unit 26 includes being erected on two cylinders 261 at 202 both ends of lower die and is arranged on Jacking block 262 at the top of 261 bar of cylinder of two cylinder 261, two cylinder 261 are located at bend pipe 300b beyond lower die 202 The underface at both ends.The one side that the jacking block 262 is contacted with the bend pipe 300b is inclined plane, then jacks up the bend pipe 300b's By the guiding of inclined plane while both ends, the bend pipe 300b is set to be moved with the lower incline direction of the inclined plane.This implementation In example, the jacking block 262 is right angled triangle block, its horizontal sides is connected with the top of 261 bar of cylinder, and vertical plane is close to institute State the trailing flank of bend pipe 300b.As optional, isometric guiding slope surface is additionally provided with the leading flank of the lower die 202, The guiding slope surface is used for after the bend pipe 300b ejects the lower mode cavity by the jacking block 262 and is directed to the slope surface, will The bend pipe 300b is directed to destination locations, reduces manually taking-up, placement operation, improves efficiency, is pressurized the automation of tool equipment.

Need cooling water to be cooled down after the bend pipe 300b shapings, cooled down for the ease of quick, in the present embodiment, two institutes To state and a cooling water tank 23 is provided with the position of lower die 202, the lower die 202 is then set up in the cooling water tank 23, and under Die cavity is higher than the top surface of the cooling water tank 23, when needing to cool down water cooling, passes through corresponding cooling water delivery pipeline system The cooling water is sprayed to the surface of bend pipe 300b, so as to carry out cooling and shaping to it.The cooling water delivery pipeline system Existing circulating water line system can be used, by control corresponding valve body, pump come realize cooling water spray purpose.

The plastic bend tube shaping mechanism 2 of the utility model is as follows to the forming elbow flow of plastic tube 300a：(1) by plastics Pipe 300a is placed on two collet 241 corresponding with the 202 both ends horizontal position of lower die, plastic tube 300a is located at the lower die The surface of chamber；(2) two drive divisions 243 of the clamping and fixing device 24 are made to drive the two arcs folder 242 to move straight down It is dynamic, so that two arc folder 242 is pressed on down the both ends of the plastic tube 300a respectively, to coordinate pair with two collet 241 The both ends of the plastic tube 300a are gripped；(3) make in two blockings, 25 horizontal direction to block the plastic tube 300a's Two-port, compressed air is poured into the plastic tube 300a so that inner air tube (is higher than outside air higher than outside air Predetermined threshold can be set according to different embodiments, as long as during meeting plastic tube 300a supercharging back elbows 300b, can Bending part is slightly expanded, make the diameter of bending part consistent with non-bending part), appropriate pours into compressed air modeling In expects pipe 300a；(4) driving upper mold 201 downwards, upper cavity is pressed downward plastic tube 300a, make the plastic tube 300a to lower die Chamber is bonded, and upper and lower mould 202 molds, to be molded bend pipe 300b；(5) bend pipe 300b coolings, extraction block 25, die sinking；(6) top pressure Device 26 is acted so that the bend pipe 300b is ejected in lower mode cavity, and is directed to the guiding slope surface, so that the bend pipe 300b is led at corresponding destination locations.

The forming plastic pipe mechanism of the utility model, compared with traditional pipe bending mechanism, traditional pipe bending mechanism can subtract Few manual operation, avoid because manual operation power is unstable and caused by pipe bent position be molded poor, the defects such as yields is low, by pipe Inside pour into appropriate compressed air so that bend pipe 300b can somewhat be expanded and is more bonded with bend pipe mould 20 during shaping, ensure bending effect Fruit is more preferable, and bending part is consistent with non-bending part diameter.

It these are only the embodiment of the utility model, it does not limit the scope of the patent of the present invention, every profit The equivalent structure or equivalent flow shift made with the utility model specification and accompanying drawing content, is directly or indirectly used in it His relevant technical field, is equally included in the patent within the scope of the utility model.

Claims (7)

1. a kind of plastic tube forming elbow mechanism, including the bend pipe mould with upper die and lower die, for driving the upper mold to erect The directly hold-down devices to the movement of lower die direction to mold, it is characterised in that：Further include one and be across the bend pipe mould both ends It is used for across frame, arranged on described across on frame and positioned at the lower die both ends when plastic tube is placed in the lower die to the plastics Clamping and fixing device that pipe is gripped, be movably arranged at it is described across on frame and for when clamping and fixing device is to the plastics Pipe blocks the two of plastic tube two-port and blocks, blocks the increasing being pressurized into the plastic tube by wherein one after being gripped Molding bend pipe is filled so that the bend pipe to be ejected to the top pressure of the lower die in bend pipe mould described in pressure device and a upward top pressure Put；It is described to include being erected on the left standing frame of the bend pipe mould left and right ends, right standing frame and be laterally arranged on described left vertical across frame Frame and the top crossbearer on right standing frame top；The hold-down devices are vertically arranged on the top crossbearer, and the lower end of the hold-down devices is worn The top crossbearer is crossed to be connected with the top of the upper mold；The two blockings difference activity is arranged on the left standing frame and right standing frame At the position that can be aligned with the corresponding ports of the plastic tube.

2. plastic tube forming elbow mechanism as claimed in claim 1, it is characterised in that：The lower die of the bend pipe mould is fixed on The underface of the top crossbearer, the lower mode cavity of the lower die are located at the top of the lower die, and the top surface of the lower die is in recessed The concave arc surface of arc, the radian that its radian and the bend pipe need to bend match, and the lower mode cavity is along the concave arc surface Length direction recessed formation downwards, runs through the lower die from the length direction of the lower die；Under the cross section of the lower mode cavity is Recessed semicircle arcuation.

3. plastic tube forming elbow mechanism as claimed in claim 2, it is characterised in that：The top of the upper mold is described with being arranged on Push up the hold-down devices connection on crossbearer, can be vertically movable under the driving of the hold-down devices, the bottom surface of the upper mold be to Under the convex concave arc surface male-female engagement with the lower mode cavity convex face, the upper cavity of the upper mold is by the convex face Open up upwards, the cross section of the upper cavity is concave up semicircle arcuation, is in and the bend pipe phase after being molded with the lower die Matched circle.

4. plastic tube forming elbow mechanism as claimed in claim 3, it is characterised in that：The hold-down devices include being arranged on described On the crossbearer of top and lower end passes through the top crossbearer to be connected to the first hydraulic cylinder of the center position at the top of the upper mold, work It is dynamic to be arranged on the top crossbearer and be located at the first guide rod of the first hydraulic cylinder both sides respectively, first guide rod The corresponding position at the vertical top for being connected to the upper mold in lower end.

5. plastic tube forming elbow mechanism as claimed in claim 4, it is characterised in that：The clamping and fixing device includes two bottoms Support, two arcs folder and two drive divisions for driving two arcs folder vertical shift；Two collet is respectively arranged in two stands Side is sentenced corresponding to the position of the plastic tube enables the both ends of the plastic tube to be respectively placed on two collet, and described two The upper surface of collet is the concave arc surface to match with the lower half side face radian of the plastic tube；The two arcs folder is in inverted-C Or it is inverted U-shaped, the radian of the radian and the upper half of the plastic tube of the lower surface of the two arcs folder matches, so as to folder It is held in the upper half of the plastic tube；Two drive division is second hydraulic cylinder, and two drive division is arranged on the top crossbearer The upper surface corresponding to two collets, its drive rod connect after being passed down through the top crossbearer with the top of corresponding arc folder.

6. plastic tube forming elbow mechanism as claimed in claim 5, it is characterised in that：Described two block in small end inwardly Taper, corresponding to being respectively equipped with one at the position of the two-port of the plastic tube and shelve plate on the left standing frame and right standing frame, The face of shelving for shelving plate is engaged in recessed cancave cambered surface with more preferable with the blocking.

7. plastic tube forming elbow mechanism as claimed in claim 6, it is characterised in that：Shelving on face respectively for plate is shelved two A return spring is provided with, plate connection is shelved in one end of two return springs with corresponding, and the other end is connected with corresponding block, when After the blocking is pulled out the port of the bend pipe, it can be repositioned to by the restoring force of the return spring and described shelve plate On；One block wherein and offer the through hole that passes through of pressure inlet for the supercharging device, the through hole is along the blocking The blocking is axially penetrated through, the pressure inlet of the supercharging device penetrates the through hole.