CN210026243U

CN210026243U - Extrusion bending blowing processing equipment for plastic bent bottle

Info

Publication number: CN210026243U
Application number: CN201920810531.5U
Authority: CN
Inventors: 黄伟镜
Original assignee: Foshan Qianfeng Industrial Co Ltd
Current assignee: Foshan Qianfeng Industrial Co Ltd
Priority date: 2019-05-30
Filing date: 2019-05-30
Publication date: 2020-02-07
Anticipated expiration: 2029-05-30

Abstract

The utility model relates to a plastics processing equipment field specifically discloses an crowded curved blowing processing equipment of curved bottle of plastics, including crowded material device, mold closing device, blowing device and cutting device, mold closing device divide into the lower mould group that contains the curved bottle of plastics and correspond crooked die cavity and the last mould group that is used for fixed idiosome upper end, and lower mould group below is equipped with and is used for fixed idiosome and follows the mechanical claw that the idiosome was bent and is the circular arc orbit motion in the centre of a circle. The utility model discloses an increased the device of the plastic embryo of buckling, and improved the mould, compare traditional special-shaped bottle extrusion blow technology, the raw materials that a large amount of edges need be cut off have been saved, the size and the designing requirement of crowded material mechanism and the requirement to mould border shear property have been reduced, consequently, can make the precision of mould higher, the body of blowing out is more exquisite pleasing to the eye, and this technology is because the thickness of raw materials embryo wall is more easily controlled, the body that makes to produce is thinner more even, the yield of production is higher.

Description

Extrusion bending blowing processing equipment for plastic bent bottle

Technical Field

The utility model relates to a plastics processing equipment field specifically discloses a crowded curved processing equipment that blows of curved bottle of plastics.

Background

With the development of modern chemical industry, plastic products become the first choice for commodity packaging, and the production and life of people are greatly facilitated due to the characteristics of beating resistance, antibiosis, good sealing, chemical stability and recyclability.

The existing plastic bottles are generally used for packaging beverages, medicines and chemical preparations, the production amount is very large, and the industrial production degree is very high. The existing plastic bottle industrial production generally has two modes:

one is an extrusion blowing process, wherein plastic raw materials are extruded to drop from top to bottom through an extrusion port, clamped by a mold, cut and blown to form;

the other method is that after plastic material is first injection molded into bottle blank, the bottle blank is heated and drawn to certain height inside a drawing and blowing machine to close the mold, and high pressure air is then blown into the bottle blank for final formation.

The two methods are the most common industrial plastic bottle production processes, but both methods have a defect that the produced plastic bottles are generally straight bottles, namely, the produced plastic bottles always comprise an axis which penetrates through the whole bottle mouth, the whole bottle body and the whole bottle bottom.

Through the extrusion-blow technology, a large bending mould is opened, and a bent bottle or a bent pipe is blown by cutting off redundant raw materials of a vertical part, however, the mode has high requirements on a die assembly side edge of the mould, and the side surface of the produced plastic bottle has a heavy die assembly line, is not attractive and harsh to touch, and has low structural strength at the die assembly position and is fragile. The mold clamping line is difficult to control, a large amount of raw materials are wasted, the production efficiency is low, the quality is difficult to control, and the precision requirement on the mold and the processing equipment is higher.

However, in some applications, an integrally bent plastic bottle or a plastic elbow is required, such as a bent-mouth bottle which is convenient for a patient to open the bottle directly to take a medicine without raising his head. The existing large-scale production mode cannot meet the actual requirement, if the traditional extrusion blowing process is adopted for production, a large amount of plastic raw materials are wasted and cut at the turning position, the process requirement is more severe during realization, the finished product rate is low, and the product thickness is difficult to control.

SUMMERY OF THE UTILITY MODEL

In order to overcome the problems of more waste materials, long mold closing line and unattractive bottle body in the prior art of producing plastic bent bottles by extrusion-blowing, the utility model provides an extrusion-bending-blowing processing device for plastic bent bottles.

The utility model adopts the technical proposal that: an extrusion, bending and blowing processing device for a plastic bent bottle comprises an extrusion device, a mold closing device, a blowing device and a cutting device, wherein the mold closing device is divided into a lower mold group and an upper mold group, the lower mold group comprises a corresponding bending cavity of the plastic bent bottle, the upper mold group is used for fixing the upper end of a blank tube, a lower knife edge used for cutting and clamping the lower end of the blank tube is arranged in the lower mold group, the lower mold group and the upper mold group are respectively a left half mold and a right half mold which are arranged in parallel along the vertical direction, lower mold closing driving pieces are arranged on two sides of the lower mold group, and upper mold closing driving pieces are arranged; and a mechanical claw for fixing the embryonic tube is arranged below the lower die set, and a power mechanism for driving the mechanical claw to move along an arc track with the bending point of the embryonic tube as the center of a circle is arranged below the mechanical claw.

Preferably, a transmission rod is arranged below or behind the mechanical claw, and the other end of the transmission rod is connected with the power mechanism.

Preferably, a fixing frame is arranged on the side surface of the mechanical claw, and a track limiting mechanism used for assisting in positioning the motion track of the mechanical claw is arranged on the inner wall of the fixing frame.

Preferably, the upper die closing driving part is an elastic mechanism with the tail end connected with the lower die closing driving part.

Preferably, a lower cavity is arranged in the lower die set, an upper cavity is arranged in the upper die set, and a cavity corresponding to an upper positioning tube for fixing the upper end of the embryonic tube is arranged at the upper end of the upper cavity.

Preferably, the boundary between the lower die set and the upper die set is located in the middle area above the bending point of the lower end of the upper positioning tube and the bending point of the blank tube.

The utility model has the advantages that: the extrusion bending and blowing process realized by the production equipment can realize large-scale industrial production of bent special-shaped plastic bottles or plastic pipes through a drawing and blowing process, saves a large amount of raw materials of which the edges need to be cut off compared with the traditional special-shaped bottle extrusion blowing process, and reduces the requirements on the cutting force and the strength of the die, thereby improving the precision of the die and reducing the die opening cost. And the thickness of the plastic raw material blank wall of the equipment is easier to control, so that the blown bottle body is more exquisite and beautiful, the produced bottle body is thinner and more uniform, the finished product ratio is higher, and the processing and forming speed is higher.

Drawings

Fig. 1 is a schematic view of the internal structure of the material extrusion of the present invention.

Fig. 2 is a front view of the upper mold of the present invention.

Fig. 3 is a schematic view of the internal structure of the lower mold closing device of the present invention.

Fig. 4 is a schematic view of a plastic curved bottle produced by the present invention.

Fig. 5 is a schematic view of another plastic curved bottle produced by the present invention.

In the figure: 101. a blank tube 102, a bottle opening 103, an upper positioning tube 104, a tailing 201, an extrusion opening 202, an upper knife edge 501 and an air blowing tube; 601. a lower die set, 602, an upper die set, 603, a lower die cavity, 604, an upper die cavity, 605, a lower die closing driving part, 606, an upper die closing driving part, 607, a side wall vertical plate, 608 and a lower knife edge; 701. mechanical claw, 702, transmission rod, 703, power piece.

Detailed Description

Referring to fig. 1 to 5, the utility model discloses an crowded curved blow processing equipment of curved bottle of plastics who contains, including crowded material device, MOLD CLAMPING APPARATUS, blowing device and cutting device. The following is one of the embodiments of the present application.

Referring to fig. 1 and 2, the extruding device is the same as the conventional extruding and blowing apparatus, and includes an extruding opening 201 for extruding the heated and melted plastic material downward into the blank tube 101, and an upper knife edge 202 for cutting off the upper end of the blank tube 101 is provided on the lower side surface of the extruding opening 201. The extrusion opening 201 can be movably adjusted in shape to achieve adjustment of the shape and wall thickness of the blank pipe 101. The blank size of the blank 101 of the present application is cut in accordance with the shape of the blank when the unbent straight bottle is blown.

Referring to fig. 3, the blowing device includes an air blowing pipe 501, an air pipe and a movable mechanism for moving the air blowing pipe 501 up and down are disposed above the air blowing pipe 501, the other end of the air pipe is connected to an air pump, and an electromagnetic valve for controlling the air output of the air blowing pipe 501 is further disposed on the air pipe. The air blowing pipe 501 moves downwards to extend into the upper positioning pipe 103 during air blowing, after the blowing is completed, the upper positioning pipe 103 fixes the plastic bent bottle outside the air blowing pipe 501 after the mold closing device is opened, and when the air blowing pipe 501 retracts upwards, the upper positioning pipe 103 falls off.

The same equipment can comprise a plurality of sets of extrusion ports 201, a mold closing device and an air blow pipe 501, and the extrusion ports, the mold closing device and the air blow pipe are arranged in parallel and work simultaneously to improve the production efficiency.

Referring to fig. 1 to 3, the mold closing device is divided into a lower mold set 601 including a corresponding bending cavity for a plastic bent bottle and an upper mold set 602 for fixing the upper end of the parison 101, a lower knife edge 608 for shearing and clamping the lower end of the parison 101 is arranged in the lower mold set 601, the lower mold set 601 and the upper mold set 602 are respectively a left half mold and a right half mold which are arranged in parallel along the vertical direction, a lower cavity 603 is arranged in the lower mold set 601, an upper cavity 604 is arranged in the upper mold set 602, the upper cavity 604 and the lower cavity 603 are combined into a cavity corresponding to the shape of the produced plastic bent bottle, the cavity sequentially comprises an upper positioning tube 103, a bottle mouth 102, a bent bottle body and a bottle bottom from top to bottom, the lower knife edge 608 is located at the middle position of the bottom of the plastic bent bottle, and the parison 101 cut out of the outer side of the cavity after the.

The dividing line between the lower die set 601 and the upper die set 602 is located in the middle area of the lower end of the upper positioning tube 103 above the bending point of the blank 101.

The lower die set 601 has lower die driving members 605 on both sides thereof, and the upper die set 602 has upper die driving members 606 on both sides thereof. Side wall vertical plates 607 for fixing the whole mold clamping device are arranged on two sides of the lower mold clamping driving part 605 and the upper mold clamping driving part 606.

Referring to fig. 2, the lower mold clamping driving member 605 and the upper mold clamping driving member 606 have two design concepts, one of which is to separately provide 2 sets of mold clamping driving members which independently operate, and to provide power by using a push rod motor or a cylinder. The other is that the upper mold clamping driving member 606 is a set of elastic mechanisms, such as springs or pneumatic rods, as shown in the figure, the other end of the elastic mechanism is connected to the pushing surface of the lower mold clamping driving member 605, the extension length difference of the elastic mechanism is larger than the width of half of the parison 101, two sides of the upper mold set 602 respectively protrude from the lower mold set 601 by the extension length difference of one elastic mechanism, at this time, when the lower mold clamping driving member 605 starts to close, the upper mold set 602 protrudes from the lower mold set 601, so the upper mold set 602 is closed first, and then, when the lower mold clamping driving member 605 continues to push in the box, the elastic mechanism of the upper mold clamping driving member 606 compresses and shortens, and finally, the lower mold set 601 also completes to close.

The outside of the mold closing device is provided with a sliding mechanism, so that the mold closing device reciprocates below the extrusion port 201 and below the blow pipe 501. Of course, the roller mode or the rotation mode is used, so that the reciprocating motion of a plurality of mold closing devices below the extrusion opening 201 and the blowing pipe 501 is also feasible, and the utilization rate of the extrusion opening 201 and the blowing pipe 501 is increased.

A mechanical claw 701 for fixing the tail 104 of the embryonic tube 101 is arranged below the lower die set 601, the mechanical claw 701 comprises a pair of symmetrical clamping plates, a groove for fixing the embryonic tube 101 is arranged in the middle of the clamping plates, a pair of power parts 703 for controlling the mechanical claw 701 to open and close is arranged outside the clamping plates, and the power parts 703 can be air cylinders or push rod motors.

A power mechanism for driving the gripper 701 to move along an arc track with a bending point of the blank tube 101 as a center is arranged below or behind the gripper 701. The gripper 701 is connected to the power mechanism by means of a transmission rod 704. The driving rod 704 has a structure for assisting the gripper 701 to determine a motion trajectory, such as a connecting rod, a positioning swing arm, and the like, so as to ensure that the gripper 701 moves along an arc trajectory with a bending point of the parison tube 101 as a center.

The side of the gripper 701 may further be provided with a fixing frame, the inner wall of the fixing frame is provided with a rail limiting mechanism for assisting in positioning the movement track of the gripper 701, and the fixing frame is fixedly connected with the side wall vertical plate 607.

The cutting device is arranged at one side of the blowing device and comprises a knife edge which moves along a horizontal or circular track and is used for cutting off the upper positioning tube 103 at the upper end of the bottle mouth 102 after the plastic bent bottle is blown.

Referring to fig. 1 to 3, the extrusion bending and blowing processing equipment for plastic bent bottles comprises the following processing steps:

s1, extruding molten plastic raw materials downwards to form a blank tube 101 in the shape of an extrusion port 201 through an extruding device;

s2, closing an upper die, and when the billet tube 101 reaches the specified length, closing the upper die set 602 to fix the upper end of the billet tube 101, closing a mechanical claw 701 positioned at the lower end of the billet tube 101 and fixing the lower end of the billet tube 101;

s3, bending, wherein the mechanical claw 701 drives the blank tube 101 to move, so that the blank tube 101 is bent at a bending point by a specified angle;

s4, closing the lower die set 601, cutting off the blank pipe 101 by a lower cutting edge 608 at the tail end of the blank pipe 101 after the lower end of the lower die set 601 is correspondingly bent, and closing and bonding the lower end head of the blank pipe 101 in the die closing device;

s5, material shearing, namely transversely moving an upper knife edge 202 to cut off the upper end of the embryonic tube 101, and moving a mold closing device to the lower part of the blowing device to enable the upper end of the embryonic tube 101 to be opposite to the blowing tube 501;

s6, blowing, namely injecting high-pressure gas into the upper end of the blank pipe 101 through the gas blowing pipe 501, and simultaneously, extending the gas blowing pipe 501 downwards into the upper positioning pipe 103 of the blank pipe 101 to enable the blank pipe 101 to be formed in a mold closing device in an expansion blowing mode;

s7, opening the lower die set 601 and the upper die set 602, cutting off the upper positioning pipe 103 at the upper end of the bottle mouth 102 through a cutting device, and finishing the production of the plastic bent bottle.

The material cutting process of step S5 may be performed at any time after step S2 is completed and before step S6 is started, and the optimal sequence is performed after step S4.

The steps S1, S5, S6 and S7 are implemented in the same manner as the conventional extrusion blow molding implementation.

Referring to fig. 3, the bending point of the embryonic tube 101 is located in the present embodiment mainly by 2 ways: firstly, a circular arc-shaped motion track behind the lower end of the embryonic tube 101 is fixed through a mechanical claw 701, so that the embryonic tube 101 is bent at a circular position in a circular arc shape; secondly, when the bending position is close to the bottle opening, the upper end of the blank tube 101 is fixed by the upper mold set 602 and abuts against the bending position, and at this time, the mechanical claw 701 moves to bend the blank tube 101 at the position where the upper mold set 602 abuts against the blank tube 101.

Referring to fig. 4, the bending point of the plastic curved bottle processed by the embodiment is located at the middle section of the bottle body, and the method for positioning the bending point is realized through the movement track of the mechanical claw 701.

Referring to fig. 5, another plastic curved bottle processed in this embodiment is bent at a joint between a bottle mouth and a bottle body, and the method for positioning the bending point is mainly realized by the upper mold set 602 abutting against the parison 101, and meanwhile, the motion trajectory of the gripper 701 is still a circular arc-shaped trajectory along the bending point.

Claims

1. The utility model provides an crowded curved blow processing equipment of curved bottle of plastics, includes crowded material device, closing die device, blowing device and cuts the device, characterized by:

the die closing device comprises a lower die set (601) and an upper die set (602), wherein the lower die set (601) comprises a bending cavity corresponding to a plastic bent bottle, the upper die set (602) is used for fixing the upper end of a blank tube (101), a lower knife edge (608) used for shearing and clamping the lower end of the blank tube (101) is arranged in the lower die set (601), the lower die set (601) and the upper die set (602) are respectively a left half die and a right half die which are arranged in parallel along the vertical direction, lower die closing driving parts (605) are arranged on two sides of the lower die set (601), and upper die closing driving parts (606) are arranged on two sides;

a mechanical claw (701) for fixing the blank tube (101) is arranged below the lower die set (601), and a power mechanism for driving the mechanical claw (701) to move along an arc track with a bending point of the blank tube (101) as the center of a circle is arranged below the mechanical claw (701).

2. The apparatus of claim 1, wherein the apparatus further comprises: a transmission rod (704) is arranged below or behind the mechanical claw (701), and the other end of the transmission rod (704) is connected with a power mechanism.

3. The apparatus of claim 1, wherein the apparatus further comprises: the side of the mechanical claw (701) is provided with a fixing frame, and the inner wall of the fixing frame is provided with a track limiting mechanism for assisting in positioning the motion track of the mechanical claw (701).

4. The apparatus of claim 1, wherein the apparatus further comprises: the upper die closing driving piece (606) is an elastic mechanism with the tail end connected with the lower die closing driving piece (605).

5. The apparatus of claim 1, wherein the apparatus further comprises: a lower cavity (603) is arranged in the lower die set (601), an upper cavity (604) is arranged in the upper die set (602), and a cavity corresponding to an upper positioning tube (103) for fixing the upper end of the embryonic tube (101) is arranged at the upper end of the upper cavity (604).

6. The apparatus of claim 5, wherein the apparatus further comprises: and the boundary between the lower die set (601) and the upper die set (602) is positioned in the middle area above the bending point of the lower end of the upper positioning tube (103) and the blank tube (101).