CN210969886U - Bellows elbow forming mechanism - Google Patents

Abstract

The utility model discloses a bellows elbow forming mechanism, which comprises a forming die, a forming tool is arranged corresponding to the forming die, a mandrel component is arranged above the forming tool in a matching way, an ejection component is arranged below the forming tool in a matching way, cavities which are communicated with each other are arranged in the forming tool and the mandrel component, the ejection component is matched with the mandrel component after passing through the forming tool through the cavity, the bending of a bellows blank in the forming die is realized, an ejection rod passes through a supporting seat, a driven plate, a base and a fixed column and then is ejected on the lower end surface of an active head, at the moment, the active head can be bent along the direction of an included angle-shaped active area formed between the active head and the fixed column, thereby driving the tube blank sleeved outside the mandrel component to form a bent shape, finally high-pressure gas is introduced to realize the bellows with bending, the bellows elbow forming mechanism has simple structure, and the equipment cost is lower, and one mould is multi-purpose, is favorable to reducing manufacturing cost.

Description

Bellows elbow forming mechanism

Technical Field

The utility model relates to a forming process mechanical equipment technical field especially relates to a bellows elbow forming mechanism.

Background

The blow molding process is a common method for molding plastic packaging containers, and is characterized in that a semi-molten tube blank (or parison) obtained by extrusion or injection molding is placed in a mold, then the mold is closed, compressed air is introduced into the tube blank to extend and expand the tube blank so as to enable the tube blank to be tightly attached to the wall of the mold cavity, and then the tube blank is cooled and demolded to obtain a hollow product in a certain shape.

SUMMERY OF THE UTILITY MODEL

The utility model discloses it is not enough to prior art, provide a bellows elbow forming mechanism, can realize the shaping of straight tube and return bend in same set of mould, simple structure, convenient operation can effective reduction in production cost.

In order to solve the technical problem, the utility model discloses a following technical scheme can solve:

the utility model provides a bellows elbow forming mechanism, includes forming die, with forming die corresponds and is provided with the shaping frock, is located shaping frock top matches and is provided with the mandrel subassembly, is located shaping frock below matches and is provided with ejecting subassembly, the shaping frock with the mandrel subassembly in all be provided with the cavity of mutual UNICOM, ejecting subassembly pass through the cavity pass the shaping frock after with the mandrel subassembly cooperation, realize bending of bellows embryo in the forming die.

In the technical scheme, the mandrel component comprises a base, a fixed column, a movable head and a return spring, a through hole is integrally formed in the fixed column, the base is coaxially sleeved at the lower end of the fixed column, the movable head is hinged to the upper end of the fixed column, and the return spring is arranged at the joint position of the fixed column and the movable head.

In the technical scheme, the end part of the movable head close to the fixed column is integrally provided with an oblique angle, so that an included movable area is formed between the fixed column and the movable head.

In the above technical scheme, the return spring is fixedly arranged at the rear end of the included angle moving area.

In the technical scheme, the ejection assembly comprises an ejection seat, a driving cylinder and an ejection rod, an air inlet is integrally formed in one side of the ejection seat, a cavity is integrally formed in the ejection seat, the ejection rod penetrates through the cavity of the ejection seat, and the tail end of the ejection rod is linked with the driving cylinder.

In the technical scheme, the sectional dimension of the ejection rod is smaller than that of the cavity in the ejection seat.

In the technical scheme, the forming tool comprises a driven plate and a supporting seat, wherein the driven plate is movably arranged on the supporting seat and rotates on the supporting seat through a driving chain.

In the technical scheme, the insert with the exhaust port is embedded in the cavity of the forming die.

In the above technical scheme, the exhaust port structure comprises a through hole with a diameter of 0.15-0.25, and a through groove with a width of 0.1-0.2 mm, wherein the through groove is positioned on one side of the through hole and integrally communicated with the through hole.

In the technical scheme, the exhaust ports are arranged along the radial direction of the insert, and the number of the exhaust ports is 4-7.

Compared with the prior art, the utility model discloses following beneficial effect has: under the drive of the ejection cylinder, the ejection rod penetrates through the supporting seat, the driven plate, the base and the fixed column and then is ejected onto the lower end face of the movable head, at the moment, the movable head can bend along the direction of an included angle-shaped movable area formed between the movable head and the fixed column, so that the pipe blank sleeved outside the mandrel component is driven to form a bending shape, and finally high-pressure gas is introduced to achieve the corrugated pipe with the bending function.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of an assembly structure of the mandrel component and the ejection component.

Fig. 3 is a schematic view of the mandrel assembly construction.

Fig. 4 is a schematic structural view of the ejection assembly.

Fig. 5 is a schematic structural view of a forming mold.

FIG. 6 is a schematic diagram of an insert structure.

Fig. 7 is a schematic view of the structure of part a in fig. 6.

Detailed Description

The embodiments of the present invention will be further explained with reference to the drawings.

Referring to fig. 1 to 6, a bellows elbow forming mechanism, including forming die 1, correspond with forming die 1 and be provided with the shaping frock, be located the shaping frock top and mate and be provided with the mandrel subassembly, be located the shaping frock below and mate and be provided with ejecting subassembly, all be provided with the cavity of mutual UNICOM in shaping frock and the mandrel subassembly, ejecting subassembly passes behind the shaping frock through the cavity and cooperates with the mandrel subassembly, realizes bending of bellows embryo in the forming die.

The mandrel component comprises a base 31, a fixed column 32, a movable head 33 and a return spring, wherein a through hole is integrally formed in the fixed column 32, the base 31 is coaxially sleeved at the lower end of the fixed column 32, the movable head 33 is hinged at the upper end of the fixed column 32, the return spring is arranged at the joint position of the fixed column 32 and the movable head 33, an oblique angle is integrally formed at the end part of the movable head 33 close to the fixed column 32, so that an included angle-shaped movable area is formed between the fixed column 32 and the movable head 33, the return spring is fixedly arranged at the rear end of the included angle-shaped movable area, the ejection component comprises an ejection seat 41, a driving cylinder 42 and an ejection rod 43, an air inlet 411 is integrally formed in one side of the ejection seat 41, a cavity is integrally formed in the ejection seat 41, the ejection rod 43 is arranged in the cavity of the ejection seat 41 in a penetrating manner, the tail end of the ejection rod 43 is, the forming tool comprises a driven disc 21 and a supporting seat 22, the driven disc 21 is movably arranged on the supporting seat 22 and rotates on the supporting seat 22 through a driving chain, an insert 11 with an exhaust port is embedded in a cavity of a forming die, the exhaust port structure comprises a through hole 111 with the diameter of 0.25mm, and a through groove 112 with the width of 0.1mm is formed in one side of the through hole 111 and integrally communicated with the through hole 111, the exhaust port is radially arranged along the insert 11, and the number of the exhaust ports is 6.

Among the above-mentioned technical scheme, among the gas vent structure, the diameter of through-hole can also be 0.15 ~ 0.25mm, and the logical groove width that is located through-hole one side and the integrative UNICOM of through-hole can also be between 0.1 ~ 0.2mm, and the quantity of setting up of gas vent can be 4 ~ 7.

After the injection molding of the tube blank is finished, the tube blank is sleeved on the mandrel component through an automatic feeding mechanism, namely, the tube blank is internally supported through the mandrel component to prevent the tube blank from collapsing and wrinkling, after the sleeving is finished, the tube blank is softened on the mandrel component, the process drives the driven disc to rotate through the driving chain, the auxiliary infrared heating equipment uniformly heats and softens the tube blank, after the softening is finished, the forming dies correspondingly arranged at two sides of the forming tool are matched, meanwhile, deep cavity exhaust is carried out through an exhaust port on an insert block in the cavity, the driving cylinder drives the ejector rod to move upwards along a cavity communicated among the ejector seat, the supporting seat, the driven disc, the base and the fixed column to the lower end face of the movable head from bottom to top, the movable head is positioned at the rear side of the included angle movable area, the movable head or the hinge shaft on the fixed column rotates towards the home education movable area along with the continuous upward movement of the ejector rod, thereby realize at the bending of mould die cavity intracavity pipe, after the completion of buckling, inject high-pressure gas into the die cavity through the air inlet on the ejecting seat to the shaping of pipe of realizing bending, treat the shaping after, drive actuating cylinder and drive the ejecting rod and return and contract, the activity head resets under return spring's effect, because the pipe inner chamber of bending after the shaping is far greater than the size of activity head, consequently, during the return, can not influence the pipe structure of bending.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims (10)

1. The utility model provides a bellows elbow forming mechanism, includes forming die (1), its characterized in that, with forming die (1) corresponds and is provided with the shaping frock, is located shaping frock top matches and is provided with the mandrel subassembly, is located shaping frock below matches and is provided with ejecting subassembly, the shaping frock with the mandrel subassembly in all be provided with the cavity of mutual UNICOM, ejecting subassembly pass through the cavity pass the shaping frock after with mandrel subassembly cooperation, realize bending of bellows embryo in the forming die.

2. The bellows elbow forming mechanism according to claim 1, wherein the mandrel assembly comprises a base (31), a fixed column (32), a movable head (33) and a return spring, a through hole is integrally formed in the fixed column (32), the base (31) is coaxially sleeved at the lower end of the fixed column (32), the movable head (33) is hinged at the upper end of the fixed column (32), and the return spring is arranged at the joint position of the fixed column (32) and the movable head (33).

3. A bellows elbow forming mechanism according to claim 2, wherein the movable head (33) is integrally beveled near the end of the fixed post (32) such that there is an included angle shaped active area between the fixed post (32) and the movable head (33).

4. A bellows elbow forming mechanism according to claim 3, wherein the return spring is fixedly disposed at a rear end of the angled active region.

5. The corrugated pipe elbow forming mechanism according to claim 1, wherein the ejection assembly comprises an ejection seat (41), a driving cylinder (42) and an ejection rod (43), an air inlet (411) is integrally formed in one side of the ejection seat (41), a cavity is integrally formed in the ejection seat (41), the ejection rod (43) is arranged in the cavity of the ejection seat (41) in a penetrating manner, and the tail end of the ejection rod (43) is linked with the driving cylinder (42).

6. A bellows elbow forming mechanism according to claim 5, characterised in that the ejector rod (43) has a cross-sectional dimension smaller than the cross-sectional dimension of the cavity inside the ejector seat (41).

7. The bellows elbow forming mechanism according to claim 1, wherein the forming tool comprises a driven disc (21) and a support seat (22), the driven disc (21) is movably disposed on the support seat (22), and rotates on the support seat (22) through a driving chain.

8. The bellows elbow forming mechanism according to claim 1, wherein an insert (11) with an exhaust port is embedded in the cavity of the forming die.

9. The bellows elbow forming mechanism according to claim 8, wherein the exhaust port comprises a through hole (111) having a diameter of 0.15-0.25, and a through groove (112) having a width of 0.1-0.2 mm located at one side of the through hole (111) and integrally communicating with the through hole (111).

10. A bellows elbow forming mechanism according to claim 8, wherein the exhaust ports are arranged in the radial direction of the insert (11) and the number of the exhaust ports is 4-7.

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