CN111645303A - A combined linkage mechanism for the linkage between the opening and closing molds of a bottle blowing machine and the bottom mold - Google Patents

Abstract

The invention discloses a combined link mechanism for interlocking the opening and closing molds and the bottom mold of a bottle blowing machine. The bottom mold moves up and down, so that the movements in two mutually perpendicular planes - the opening and closing motion of the mold opening and closing and the lifting motion of the bottom mold are precisely matched, so as to realize the effective coordination of the lifting motion of the bottom mold and the opening and closing motion of the mold opening and closing. The invention relates to a combined connecting rod mechanism for interlocking the opening and closing molds of a bottle blowing machine with a bottom mold, which is composed of two plane four-link mechanisms connected in parallel, and then connected in parallel or in series with a space crank slider type bottom mold lifting mechanism. The connection between the components is a sliding pair, a rotating pair or a spherical pair. The mechanism is simple and the dynamic load is small, which can effectively reduce the vibration and impact of the mechanism, reduce the wear of parts, and can precisely control the movement of the bottom mold, enhance the movement stability and reliability of the blow molding machine, and improve the high-speed performance of the whole machine.

Description

A combined linkage mechanism for the linkage between the opening and closing molds of a bottle blowing machine and the bottom mold

technical field

The invention relates to the technical field of bottle blowing machines, in particular to a combined link mechanism of a bottle blowing machine for interlocking a mold opening and closing and a bottom mold.

Background technique

Blow molding machine is the key equipment for producing plastic bottles for various liquid packaging. Each process of the blow molding machine has strict requirements and high requirements for mutual cooperation, especially for the synchronous control of the opening and closing movement of the opening and closing molds and the lifting movement of the bottom mold.

There are mainly two types of existing mechanisms for realizing the synchronous movement of the bottom mold and the opening and closing molds: one is a cylindrical space cam mechanism; the other is a composite mechanism formed by a space four-bar linkage mechanism and a plane cam mechanism.

The advantages of the first type of mechanism: simple mechanism and few moving parts. Disadvantages of the first type of mechanism: 1) The design and machining accuracy of the cam flange or groove profile of the cylindrical space cam are high, the installation and positioning of the cam is difficult, and the rotor is easy to get stuck; 2) The contact surface between the rotor and the cam profile is easy to form Point contact, the compressive stress is large, the rotor is easy to be damaged or the convex surface is easy to wear; 3) Due to the limitation of space size, the pressure angle of the cam is usually too large. Similarly, the rotor is easy to be damaged or the convex surface is easy to wear.

The advantages of the second type of mechanism: the design, processing and installation of the space four-bar linkage mechanism and the plane cam mechanism are simpler than those of the first type of mechanism. Disadvantages of the second type of mechanism: limited by the space size, usually the cam pressure angle is large, one is that the rotor is easily damaged or the cam profile is easy to wear, and the other is that the dynamic load of the connecting rod transmitted to the space four-bar linkage mechanism is large, and the pressure At this time, the connecting rod is easy to become unstable, which directly affects the high-speed performance of the whole blow molding machine.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a combined linkage mechanism for the linkage between the mold opening and closing of the bottle blowing machine and the bottom mold. The mechanism is simple, the dynamic load is small, the vibration and impact of the mechanism can be effectively reduced, the wear of parts and components can be reduced, and the precise control is possible. The movement of the bottom mold enhances the movement stability and reliability of the blow molding machine, and improves the high-speed performance of the whole machine.

To achieve the above object, the technical scheme adopted in the present invention is:

A combined linkage mechanism of a bottle blowing machine for opening and closing molds and a bottom mold, comprising a left mold base, a right mold base, a mold opening and closing swing arm, a left mold connecting rod, a right mold connecting rod, a bottom mold, a bottom mold guide rail, Mold base bracket, bottom mold support, mold opening and closing rotor arm, mold opening and closing swing shaft, bottom mold swing arm, space connecting rod;

The mold opening and closing rotor arm is used for swinging under the drive of the mold opening and closing cam; the mold opening and closing rotor arm and the mold opening and closing swing arm are both fixedly connected to the rotor and are rotatable around the direction of their own axis. on the mold opening and closing swing shaft on the mold frame support; the two ends of the left mold connecting rod/right mold connecting rod are respectively connected with the mold opening and closing swing arm and rotatably connected on the mold frame support The left mold frame/right mold frame is rotatably connected, and when the mold opening and closing rotor arm swings, it is used to drive the left mold frame and the right mold frame to open and close;

The bottom mold swing arm is fixedly connected to the opening and closing mold swing shaft or the left mold frame or the right mold frame. the bottom mold swing arm and the bottom mold; the bottom mold support is fixed on the mold base support, and the bottom mold can be fixed on the bottom mold guide rail fixed on the bottom mold support Sliding up, when the rotor arm of the mold opening and closing swings, it is used to drive the bottom mold to do a lifting motion;

It is composed of the left mold frame, the left mold connecting rod, the mold opening and closing swing arm, the mold opening and closing rotor arm fixed on the swing shaft of the mold opening and closing, and the mold frame support. The connecting rod mechanism is the first plane four-bar linkage mechanism; it consists of the right mold frame, the right mold connecting rod, the opening and closing mold swing arm and the The connecting rod mechanism formed by the mold opening and closing rotor arm and the mold frame bracket is a second plane four-bar linkage mechanism;

By the parallel connection of the above-mentioned two plane four-bar linkages, a type of plane linkage type mold opening and closing mechanism is formed;

The bottom mold support and the bottom mold support fixed on it and the bottom mold guide rail, the bottom mold, the space link, the bottom mold swing arm and the bottom mold The connecting rod mechanism formed by the fixedly connected rotor arm of the mold opening and closing or the left mold frame or the right mold frame is a type of space crank slider type bottom mold lifting mechanism; wherein, the bottom mold swing arm is The movement plane is perpendicular to the movement plane of the bottom mold;

When the swing arm of the bottom mold is fixed on the swing shaft of the mold opening and closing, the parallel connection between the plane link type mold opening and closing mechanism and the space crank slider type bottom mold lifting mechanism constitutes the The combined linkage mechanism for the linkage between the mold opening and closing of the blow molding machine and the bottom mold;

When the bottom mold swing arm is fixedly connected to the left mold base or the right mold base, the plane link type mold opening and closing mechanism and the space crank slider type bottom mold lifting mechanism Connected in series to form a combined linkage mechanism for the opening and closing molds of the bottle blowing machine to be linked with the bottom mold.

Preferably, in the bottom mold and the left mold base/right mold base, one is provided with a wedge-shaped ring groove, and the other is provided with a wedge-shaped snap ring for snapping into the wedge-shaped ring groove;

In the initial stage of mold opening, the left mold frame and the right mold frame are driven by the mold opening and closing rotor arm to gradually open, until the wedge ring groove and the wedge snap ring are completely separated, the space crank slider The bottom mold lifting mechanism controls the displacement generated by the bottom mold to be smaller than the gap between the wedge-shaped snap ring and the wedge-shaped ring groove, forming an approximate rest period of the bottom mold movement;

In the later stage of mold clamping, the left mold frame and the right mold frame are driven by the mold opening and closing rotor arm to gradually close. After the wedge-shaped snap ring enters the wedge-shaped ring groove until it is completely matched, the space crank slides. The block-type bottom mold lifting mechanism controls the displacement generated by the bottom mold to be smaller than the gap between the wedge-shaped snap ring and the wedge-shaped ring groove, forming an approximate rest period of the bottom mold movement;

In the middle and late stages of mold opening, the space crank-slider bottom mold lifting mechanism is used to control the larger displacement of the bottom mold;

In the initial stage and the middle stage of mold clamping, the space crank-slider bottom mold lifting mechanism is used to control the bottom mold to rise and have a larger displacement.

Due to the application of the above-mentioned technical solutions, the present invention has the following advantages compared with the prior art: a combined linkage mechanism of the present invention for the linkage between the opening and closing molds of the bottle blowing machine and the bottom mold, after the parallel connection of two plane four-bar linkage mechanisms, It is connected in parallel or in series with the space crank-slider bottom mold lifting mechanism. The connection between the components is a sliding pair, a rotating pair or a spherical pair. The combined linkage mechanism of the blowing machine for opening and closing the mold and the bottom mold has a simple mechanism and small dynamic load, which can effectively reduce the vibration and impact of the mechanism, reduce the wear of parts, and can accurately control the movement of the bottom mold and enhance the blowing effect. The movement stability and reliability of the bottle machine improve the high-speed performance of the whole machine.

Description of drawings

Accompanying drawing 1 is the structure schematic diagram 1 of the device of the present invention;

Accompanying drawing 2 is the structural representation two of the device of the present invention;

FIG. 3 is a schematic diagram showing the change of the vertical displacement of the bottom mold and the opening and closing angle of the mold opening and closing with the swing of the mold opening and closing rotor arm.

Among them: 1. Left mold base; 2. Right mold base; 3. Swing arm of mold opening and closing; 4. Left mold connecting rod; 5. Right mold connecting rod; 6. Bottom mold; 7. Bottom mold guide rail; 8. Mold 9. Bottom mold support; 10. Open and close mold rotor arm; 11. Open and close mold swing shaft; 12, Bottom mold swing arm; 13, Space connecting rod; 14, First shaft.

Detailed ways

The technical solutions of the present invention will be further elaborated below in conjunction with the accompanying drawings.

Referring to Figures 1-2, the above-mentioned combined linkage mechanism for the linkage between the mold opening and closing of the bottle blowing machine and the bottom mold includes a left mold base 1, a right mold base 2, a mold opening and closing swing arm 3, and a left mold connecting rod 4. , right die connecting rod 5, bottom die 6, bottom die guide rail 7, die frame support 8, bottom die support 9, mold opening and closing rotor arm 10, opening and closing mold swing shaft 11, bottom mold swing arm 12, space connecting rod 13 . The left mold base 1 and the right mold base 2 are both rotatably arranged on the mold base support 8 around the first axis 14, and are used for mold opening and mold closing in cooperation with each other.

In the bottom mold 6 and the left mold base 1/right mold base 2, one is provided with a wedge-shaped ring groove, and the other is provided with a wedge-shaped snap ring for snapping into the wedge-shaped ring groove. Here, the bottom mold 6 alone is regarded as one, and the left mold base 1 and the right mold base 2 as a whole are regarded as the other.

The mold opening and closing rotor arm 10 is used for swinging under the driving of the mold opening and closing cam. The mold opening and closing rotor arm 10 and the mold opening and closing swing arm 3 are both fixedly connected to the mold opening and closing swing shaft 11 which is rotatable around its own axis and is provided on the mold frame support 8; in this embodiment, the opening and closing The axis direction of the die swing shaft 11 is parallel to the first shaft 14 and both extend in the vertical direction. The two ends of the left mold connecting rod 4 are respectively connected with the opening and closing mold swing arm 3 and the left mold base 1 which can be hinged and rotated on the mold base bracket 8. The two ends of the right mold connecting rod 5 are respectively connected with the opening and closing mold. The swing arm 3 and the right mold base 2 which can be cylindrically hinged on the mold base bracket 8 are cylindrically hinged. When the mold opening and closing rotor arm 10 swings (that is, swings around the axis line of the mold closing swing shaft 11), it is used to drive the left mold frame 1 and the right mold frame 2 to open and close.

The bottom mold swing arm 12 is fixed on the opening and closing mold swing shaft 11 or the left mold frame 1 or the right mold frame 2, and the two ends of the space connecting rod 13 are respectively hinged on the bottom mold swing arm 12 and the bottom mold 6 through the spherical surface of the joint bearing, The two ends of the space connecting rod 13 are respectively fixedly connected with the two joint bearings. The bottom mold support 9 is fixed on the mold base support 8 , and the bottom mold 6 can move up and down on the bottom mold guide rail 7 fixed on the bottom mold support 9 . When the mold opening and closing rotor arm 10 swings (that is, swings in the direction of the axis line of the mold closing swing shaft 11), it is used to drive the bottom mold 6 to move up and down.

Referring to FIG. 1 , in this embodiment, the lower end of the space connecting rod 13 is spherically hinged to the bottom mold swing arm 12 through a joint bearing, and the upper end of the space connecting rod 13 is spherically hinged to the bottom end of the bottom mold 6 through a joint bearing. The left end of the swing arm 12 of the bottom mold is fixedly connected to the swing shaft 11 of the mold opening and closing, and the right end of the swing arm 12 of the bottom mold is connected to the lower end of the space connecting rod 13 through a joint bearing. The mold opening and closing swing arm 3 and the mold opening and closing rotor arm 10 are both fixedly connected to the mold opening and closing swing shaft 11, and the three form a whole.

The link mechanism formed by the left mold base 1, the left mold connecting rod 4, the mold opening and closing swing arm 3, the mold opening and closing rotor arm 10 and the mold base bracket 8 fixedly connected to the mold opening and closing swing shaft 11 is the first. A plane four-bar linkage mechanism; consists of the right mold base 2, the right mold connecting rod 5, the mold opening and closing swing arm 3 and the mold opening and closing rotor arm 10 and the mold base bracket 8 that are fixedly connected to the mold opening and closing swing shaft 11. The formed link mechanism is a second plane four-link mechanism; a type of plane link type mold opening and closing mechanism is formed by the parallel connection of the above two plane four-link mechanisms.

It consists of the mold base bracket 8, the bottom mold support 9 fixed on it, the bottom mold guide rail 7, the bottom mold 6, the space connecting rod 13, the bottom mold swing arm 12 and the bottom mold guide rail 7 fixed on the bottom mold support 9. The connecting rod mechanism formed by the mold opening and closing rotor arm 10 or the left mold frame 1 or the right mold frame 2 is a type of space crank slider type bottom mold lifting mechanism. Wherein, the motion plane of the bottom mold swing arm 12 and the motion plane of the bottom mold 6 are perpendicular to each other. The movement plane of the bottom mold swing arm 12 and the mold opening and closing rotor arm 10 or the left mold frame 1 or the right mold frame 2 is a horizontal plane, and the moving plane of the bottom mold 6 is a vertical plane.

In one case, the swing arm 12 of the bottom mold is fixed on the swing shaft 11 of the mold opening and closing. The utility model relates to a combined linkage mechanism for the linkage between the opening and closing molds of a bottle blowing machine and the bottom mold. Since the mold opening and closing swing arm 3, the mold opening and closing rotor arm 10 and the mold opening and closing swing shaft 11 are integrated, no matter which of the three swing arms 12 of the bottom mold is fixed on, the plane link type is formed. The open and close mold opening and closing mechanism is connected in parallel with the space crank slider type bottom mold lifting mechanism.

In another case, the bottom mold swing arm 12 is fixedly connected to the left mold base 1 or the right mold base 2, and is formed by the above-mentioned plane link type mold opening and closing mechanism and the above-mentioned space crank slider type bottom mold lifting mechanism. Connected in series to form a combined linkage mechanism for the linkage between the mold opening and closing of the bottle blowing machine and the bottom mold.

In the initial stage of mold opening, the left mold base 1 and the right mold base 2 are driven by the mold opening and closing rotor arm 10 to gradually open until the wedge-shaped ring groove and the wedge-shaped snap ring are completely separated. The space crank slider type bottom mold lifting mechanism controls the bottom mold 6 The displacement generated is smaller than the gap between the wedge-shaped snap ring and the wedge-shaped ring groove, forming an approximate rest period of the movement of the bottom mold 6;

In the later stage of mold closing, the left mold frame 1 and the right mold frame 2 are driven by the opening and closing rotor arm 10 to gradually close, and after the wedge-shaped snap ring enters the wedge-shaped ring groove until it is completely matched, the space crank slider type bottom mold lifting mechanism controls the bottom mold. The displacement generated by the die 6 is smaller than the gap between the wedge-shaped snap ring and the wedge-shaped ring groove, forming an approximate rest period of the movement of the bottom die 6 .

In the middle and later stages of mold opening, the space crank slider bottom mold lifting mechanism is used to control the lower displacement of the bottom mold 6; and there is no interference with the bottle picking movement of the bottle picking mechanism;

In the early and middle stages of mold clamping, the space crank-slider bottom mold lifting mechanism is used to control the larger displacement of the bottom mold 6 .

Referring to Figure 3, the X axis is the rotation angle of the blowing machine, the Y1 axis is the vertical displacement of the bottom mold 6, the Y2 axis is the opening and closing angle of the left mold base 1 and the right mold base 2, and the solid line is The displacement curve of the bottom mold 6 in the vertical direction, the dotted line is the opening and closing angle curve of the left mold base 1 and the right mold base 2, O is the starting point of mold opening, A is the point where the wedge-shaped snap ring is separated from the wedge-shaped ring groove, and B is the mold opening The end point, C is the point where the wedge-shaped snap ring enters the groove of the wedge-shaped ring, D is the end point of mold clamping, E is the lowest point of the bottom mold 6, F is the starting point of the upper end of the bottom mold 6, G is the maximum opening angle of the mold opening and closing, and H is the The opening angle of the opening and closing die when the wedge-shaped snap ring leaves the wedge-shaped ring groove or enters the wedge-shaped ring groove. It can be seen from FIG. 3 that at the initial stage of mold opening (OA section) and the later stage of mold clamping (CD section), with the swing of the mold opening and closing rotor arm 10, the displacement of the bottom mold 6 in the vertical direction changes very little, while in the In the middle and late stage of mold opening (the whole is the AB section) and the early and middle stage of the mold closing (the whole is the BC section), with the swing of the mold opening and closing rotor arm 10, the bottom mold 6 has a large displacement change in the vertical direction.

The working process of the present embodiment is described in detail below:

When the mold is opened, the mold opening and closing cam drives the mold opening and closing rotor arm 10 to swing forward, and drives the mold opening and closing mold bases (left mold base 1 and right mold base 2) to open the mold. Before the wedge-shaped snap ring leaves the wedge-shaped ring groove (OA) Section), the bottom mold 6 is in the approximate rest period of movement, after the wedge-shaped snap ring is separated from the wedge-shaped ring groove, the bottom mold 6 will descend a large displacement (AB section) until the mold opening is completed;

When the mold is closed, the mold opening and closing cam drives the mold opening and closing rotor arm 10 to swing in the opposite direction, and drives the mold opening and closing mold bases (left mold base 1 and right mold base 2) to close the mold, and the bottom mold 6 will rise to a large displacement (BC section). ), with the continuous swing of the mold opening and closing rotor arm 10, after the wedge-shaped snap ring enters the wedge-shaped ring groove (CD segment), the bottom mold 6 is in an approximate rest period of movement until the mold clamping is completed.

The above-mentioned embodiments are only intended to illustrate the technical concept and characteristics of the present invention, and the purpose thereof is to enable those who are familiar with the art to understand the content of the present invention and implement them accordingly, and cannot limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be included within the protection scope of the present invention.

Claims (2)

1. A combined link mechanism for linking an opening mold and a bottom mold of a bottle blowing machine comprises a left mold frame, a right mold frame, an opening mold swing arm, a left mold connecting rod, a right mold connecting rod, a bottom mold guide rail, a mold frame support, a bottom mold support, an opening mold rotor arm, an opening mold swing shaft, a bottom mold swing arm and a space connecting rod;

the mold opening and closing rotor arm is used for swinging under the driving of a mold opening and closing cam; the mold opening and closing rotor arm and the mold opening and closing swing arm are fixedly connected to the mold opening and closing swing shaft which is arranged on the mold frame support and can rotate around the axis direction of the mold opening and closing rotor arm and the mold opening and closing swing arm; the two ends of the left mold connecting rod/the right mold connecting rod are respectively rotatably connected with the mold opening and closing swing arm and the left mold frame/the right mold frame which can be rotatably connected on the mold frame support, and the mold opening and closing rotor arm is used for driving the left mold frame and the right mold frame to perform opening and closing movement when swinging;

the bottom die swing arm is fixedly connected to the opening and closing die swing shaft or the left die frame or the right die frame, and two ends of the space connecting rod are respectively hinged to the bottom die swing arm and the bottom die through spherical surfaces of joint bearings fixedly connected to the space connecting rod; the bottom die support is fixedly arranged on the die carrier support, the bottom die can slide on a bottom die guide rail fixedly connected to the bottom die support, and the die opening and closing rotor arm is used for driving the bottom die to do lifting motion when swinging;

the method is characterized in that: the connecting rod mechanism formed by the left die frame, the left die connecting rod, the die opening and closing swing arm, the die opening and closing rotor arm fixedly connected with the die opening and closing swing arm and the die frame support is a first plane four-connecting rod mechanism; the connecting rod mechanism formed by the right die frame, the right die connecting rod, the die opening and closing swing arm, the die opening and closing rotor arm fixedly connected with the die opening and closing swing arm and the die frame support is a second plane four-connecting rod mechanism;

the two plane four-bar linkage mechanisms are connected in parallel to form a plane connecting bar type opening and closing mechanism for opening and closing the mold;

a connecting rod mechanism consisting of the die carrier support, the bottom die support fixedly connected to the die carrier support, the bottom die guide rail fixedly connected to the bottom die support, the bottom die, the space connecting rod, the bottom die swing arm and the die opening and closing rotor arm fixedly connected to the bottom die swing arm or the left die carrier or the right die carrier is a spatial crank-slider type bottom die lifting mechanism; the motion plane of the bottom die swing arm is perpendicular to the motion plane of the bottom die;

when the bottom die swing arm is fixedly connected to the die opening and closing swing shaft, the plane connecting rod type die opening and closing mechanism is connected with the space crank slide block type bottom die lifting mechanism in parallel to form a combined connecting rod mechanism for linkage of the die opening and closing and the bottom die of the bottle blowing machine;

when the bottom die swing arm is fixedly connected to the left die frame or the right die frame, the combined connecting rod mechanism for linking the opening and closing die and the bottom die of the bottle blowing machine is formed by connecting the plane connecting rod type opening and closing die opening and closing mechanism and the space crank slide block type bottom die lifting mechanism in series.

2. The combined link mechanism for opening and closing the die and linking the bottom die of the bottle blowing machine according to claim 1, which is characterized in that: one of the bottom die and the left die frame/the right die frame is provided with a wedge-shaped ring groove, and the other one is provided with a wedge-shaped snap ring which is clamped in the wedge-shaped ring groove;

in the initial stage of die opening, the die opening and closing rotor arm drives the left die frame and the right die frame to gradually open until the wedge-shaped ring groove is completely separated from the wedge-shaped clamping ring, and the spatial crank block type bottom die lifting mechanism controls the displacement generated by the bottom die to be smaller than the gap between the wedge-shaped clamping ring and the wedge-shaped ring groove, so that an approximate rest period of the bottom die movement is formed;

in the later die assembly period, the left die frame and the right die frame are driven to be gradually closed by the die opening and closing rotor arm, the wedge-shaped clamping ring enters the wedge-shaped ring groove and then is closed completely, the displacement generated by the bottom die is controlled by the spatial crank block type bottom die lifting mechanism to be smaller than the gap between the wedge-shaped clamping ring and the wedge-shaped ring groove, and an approximate rest period of the bottom die movement is formed;

the space crank block type bottom die lifting mechanism is used for controlling the bottom die to descend by a large displacement in the middle and later die opening periods;

in the initial stage and the middle stage of die assembly, the space crank block type bottom die lifting mechanism is used for controlling the bottom die to ascend by a large displacement.

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