Full-link combined linkage mechanism for opening and closing molds and bottom mold linkage of bottle blowing machine

Abstract

The present invention discloses a full-link type combined connecting rod mechanism for the opening and closing of a bottle blowing machine and the linkage of a bottom mold, and a mold opening and closing rotor arm for driving the opening and closing of the mold. While driving the opening and closing of the mold, the bottom mold is synchronously driven to perform lifting and lowering movements, so that the movements in two mutually perpendicular planes - the opening and closing of the mold and the lifting and lowering of the bottom mold are precisely coordinated, so as to achieve effective coordination of the lifting and lowering of the bottom mold and the opening and closing of the mold. The fully-link type combined connecting rod mechanism, which has been precisely designed and calculated, has a simple mechanism, precise movement, and a small dynamic load. It can avoid the shortcomings of the existing separate bottom mold mechanism, such as low movement matching accuracy, and can overcome the difficulties in processing, installing and positioning of components such as (space) cams involved in the existing bottom mold linkage mechanism, and the high contact stress between the cam and the follower of the cam mechanism, and the large wear of components, and can effectively reduce the vibration, impact and noise of the mechanism, and improve the service life of the product.

Description

Technical Field

[0001] The invention relates to the technical field of bottle blowing machines, and in particular to a full-linkage combined connecting rod mechanism for linking a mold opening and closing of a bottle blowing machine with a bottom mold. Background Art

[0002] Bottle blowing machine is a key equipment for producing plastic bottles for various liquid packaging. During production, the preforms treated by the heating process are sent by the preform feeding mechanism of the bottle blowing machine to the cavity with the same shape as the required plastic bottle. After stretching, blowing, cooling and other processes, the required plastic bottles are finally formed and taken away by the bottle taking mechanism to the next process. The requirements for each process of the bottle blowing machine are strict and require high coordination with each other, especially the synchronous control requirements for the opening and closing movement of the mold and the lifting and lowering movement of the bottom mold are very strict.

[0003] There are two main types of existing mechanisms for achieving 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.

[0004] Advantages of the first type of mechanism: simple mechanism and few moving parts. Disadvantages of the first type of mechanism: 1) The design and processing accuracy of the cam flange or groove profile of the cylindrical space cam is 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 cam profile surface is easy to wear; 3) Due to the limitation of space size, the cam pressure angle is usually large, and similarly, the rotor is easy to be damaged or the cam profile surface is easy to wear.

[0005] Advantages of the second type of mechanism: The design, processing and installation of the spatial four-bar linkage and the planar cam mechanism are simpler than those of the first type of mechanism. Disadvantages of the second type of mechanism: Due to the limitation of the space size, the cam pressure angle is usually large. First, the rotor is easy to be damaged or the cam profile surface is easy to wear. Second, the dynamic load transmitted to the connecting rod in the spatial four-bar linkage is large. When under pressure, the connecting rod is easy to become unstable, which directly affects the high-speed performance of the entire blow molding machine. Summary of the invention

[0006] The purpose of the present invention is to provide a full-linkage combined connecting rod mechanism for linking the opening and closing molds of a bottle blowing machine with a bottom mold, which has a simple structure and a small dynamic load, can effectively reduce the vibration and impact of the mechanism, reduce the wear of parts, enhance the movement stability and reliability of the bottle blowing machine, and improve the high-speed performance of the whole machine.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] A full-linkage combined connecting rod mechanism for the opening and closing of a mold and the bottom mold of a bottle blowing machine, comprising a left mold frame, a right mold frame, an opening and closing mold swing arm, an opening and closing mold connecting rod, a bottom mold, a bottom mold guide rail, a mold frame bracket, a bottom mold bracket, an opening and closing mold cam rotor, an opening and closing mold rotor arm, an opening and closing mold swing shaft, an auxiliary rotating arm, a space connecting rod, a bottom mold swing rod, a bottom mold crank and a bottom mold pull rod;

[0009] The mold opening and closing cam rotor is rotatably arranged on the mold opening and closing rotor arm around its own axis, and is used to drive the mold opening and closing rotor arm to swing 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 mold opening and closing swing shaft rotatably arranged on the mold frame bracket around its own axis. The two ends of the mold opening and closing connecting rod are respectively hinged to the mold opening and closing swing arm and the left mold frame / right mold frame cylindrical surface that can be hinged and rotated on the mold frame bracket. When the mold opening and closing rotor arm swings, it is used to drive the left mold frame and the right mold frame to perform opening and closing movements;

[0010] The auxiliary rotating arm is fixedly connected to the mold opening and closing rotor arm or the left mold frame or the right mold frame, and the two ends of the spatial connecting rod are respectively spherically hinged to the auxiliary rotating arm and the bottom mold swing rod through the joint bearings fixedly connected thereto. The bottom mold bracket is fixedly arranged on the mold frame bracket, and the bottom mold swing rod can rotate around an axis on the bottom mold bracket. One end of the bottom mold crank is fixedly connected to the bottom mold swing rod, and the other end is cylindrically hinged to the bottom mold pull rod. The bottom mold pull rod is cylindrically hinged to the bottom mold. The bottom mold can slide on the bottom mold guide rail fixedly connected to the bottom mold bracket. When the mold opening and closing rotor arm swings, it is used to drive the bottom mold to perform lifting movement;

[0011] The link mechanism composed of the mold opening and closing rotor arm or the left mold frame or the right mold frame and the auxiliary rotating arm fixed thereon, the mold frame bracket and the bottom mold bracket fixed thereon, the spatial connecting rod, and the bottom mold swing rod is a type of spatial four-bar linkage mechanism; in the spatial four-bar linkage mechanism, the movement plane of the mold opening and closing rotor arm or the left mold frame or the right mold frame and the auxiliary rotating arm fixed thereon is perpendicular to the movement plane of the bottom mold swing rod;

[0012] The connecting rod mechanism composed of the bottom mold crank, the bottom mold pull rod, the bottom mold, the bottom mold bracket and the bottom mold guide rail fixed thereon is a type of plane crank slider mechanism;

[0013] The series connection of the spatial four-bar linkage and the planar crank slider mechanism forms a series-type combined-linkage bottom mold lifting mechanism;

[0014] The link mechanism formed by the left mold frame or the right mold frame, the mold opening and closing connecting rod, the mold opening and closing swing arm, the mold opening and closing rotor arm fixedly connected to the mold opening and closing swing shaft, and the mold frame bracket is a type of planar four-bar link mechanism;

[0015] The combination of the series-type combined-link bottom mold lifting mechanism and the planar four-link mechanism forms a full-link combined-link mechanism in which the mold opening and closing of the bottle blowing machine is linked with the bottom mold.

[0016] Preferably,

[0017] In the initial stage of mold opening, the angle between the bottom mold swing arm and the space connecting rod is an acute angle, and the angle between the auxiliary rotating arm and the space connecting rod is an obtuse angle; in the later stage of mold opening, the angle between the bottom mold swing arm and the space connecting rod is an obtuse angle, and the angle between the auxiliary rotating arm and the space connecting rod is an acute angle;

[0018] In the initial stage of mold closing, the angle between the bottom mold swing arm and the space connecting rod is an obtuse angle, and the angle between the auxiliary rotating arm and the space connecting rod is an acute angle; in the later stage of mold closing, the angle between the bottom mold swing arm and the space connecting rod is an acute angle, and the angle between the auxiliary rotating arm and the space connecting rod is an obtuse angle;

[0019] When the bottom mold is located at the upper starting point, the bottom mold crank and the bottom mold pull rod form an approximately straight line shape with an included angle of 170°-180°.

[0020] More preferably, one of the bottom mold and the left mold frame / right mold frame is provided with a wedge-shaped ring groove, and the other is provided with a wedge-shaped clamping ring for clamping into the wedge-shaped ring groove;

[0021] The series-type combined connecting rod bottom mold lifting mechanism has a high sensitivity state and a low sensitivity state;

[0022] At the initial stage of mold opening, the series-type combined connecting rod type bottom mold lifting mechanism is in the low-sensitivity state, and the left mold frame and the right mold frame are gradually opened by the mold opening and closing rotor arm, until the wedge-shaped ring groove and the wedge-shaped clamping ring are completely separated, and the series-type combined connecting rod type bottom mold lifting mechanism controls the displacement of the bottom mold to be smaller than the gap between the wedge-shaped clamping ring and the wedge-shaped ring groove, forming an approximate rest period of the bottom mold movement;

[0023] In the late stage of mold closing, the series-type combined connecting rod type bottom mold lifting mechanism is in the low-sensitivity state, and the left mold frame and the right mold frame are gradually closed by the mold opening and closing rotor arm. After the wedge-shaped clamping ring enters the wedge-shaped ring groove until it is completely engaged, the series-type combined connecting rod type bottom mold lifting mechanism controls the displacement of the bottom mold to be smaller than the gap between the wedge-shaped clamping ring and the wedge-shaped ring groove, forming an approximate rest period of the bottom mold movement;

[0024] In the middle stage of mold opening, the series-type combined connecting rod bottom mold lifting mechanism is in the high-sensitivity state, which is used to control the bottom mold to descend with a large displacement;

[0025] In the middle stage of mold closing, the series-type combined connecting rod bottom mold lifting mechanism is in the high-sensitivity state, which is used to control the bottom mold to rise to a larger displacement.

[0026] More preferably,

[0027] In the middle and late stages of mold opening, the series-type combined connecting rod bottom mold lifting mechanism controls the movement of the bottom mold and the movement of the bottle taken by the bottle taking mechanism without geometric interference;

[0028] In the middle and late stages of mold closing, the series-type combined connecting rod bottom mold lifting mechanism controls the movement of the bottom mold and the movement of the preforms delivered by the preform delivery mechanism without geometric interference.

[0029] Preferably, the angle between the bottom mold rocker and the bottom mold crank is α, wherein 0°≤α≤180°.

[0030] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: the present invention is a full-link type combined linkage mechanism for the opening and closing of the mold of the bottle blowing machine and the linkage with the bottom mold, including a combination of a type of spatial four-link mechanism and a type of plane crank slider mechanism in series and a type of plane four-link mechanism, and the whole mechanism is a low-pair mechanism. That is, the movement of the bottom mold on the bottom mold guide rail constitutes a sliding pair, and the connection of other parts is a cylindrical or spherical hinge connection, which is a rotating pair or a spherical pair. Therefore, the full-link type combined linkage mechanism has the advantages of simple structure, easy manufacturing, reliable operation, strong load bearing capacity, and large power transmission that the low-pair mechanism usually has. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Attached Figure 1 The structure of the device of the present invention is shown in FIG. Figure 1 ;

[0032] Attached Figure 2 The structure of the device of the present invention is shown in FIG. Figure 2 ;

[0033] Attached Figure 3 It is a schematic diagram of the changes in the vertical displacement of the bottom mold and the opening and closing angle of the mold as the mold opening and closing rotor arm swings.

[0034] Among them: 1. Left mold frame; 2. Right mold frame; 3. Opening and closing mold swing arm; 4. Opening and closing mold connecting rod; 5. Bottom mold; 6. Bottom mold guide rail; 7. Mold frame bracket; 8. Bottom mold bracket; 9. Opening and closing mold cam rotor; 10. Opening and closing mold rotor arm; 11. Opening and closing mold swing shaft; 12. Auxiliary rotating arm; 13. Space connecting rod; 14. Bottom mold swing rod; 15. Bottom mold crank; 16. Bottom mold pull rod; 17. First axis. DETAILED DESCRIPTION

[0035] The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0036] See also Figure 1-2 As shown, the above-mentioned full-linkage combined connecting rod mechanism of the mold opening and closing of the bottle blowing machine and the bottom mold linkage includes a left mold frame 1, a right mold frame 2, a mold opening and closing swing arm 3, a mold opening and closing connecting rod 4, a bottom mold 5, a bottom mold guide rail 6, a mold frame bracket 7, a bottom mold bracket 8, a mold opening and closing cam rotor 9, a mold opening and closing rotor arm 10, a mold opening and closing swing shaft 11, an auxiliary rotating arm 12, a space connecting rod 13, a bottom mold swing rod 14, a bottom mold crank 15 and a bottom mold pull rod 16. The left mold frame 1 and the right mold frame 2 are both rotatably arranged on the mold frame bracket 7 around the first axis 17 for mutually cooperating mold opening and closing.

[0037] In the bottom mold 5, the left mold frame 1 / right mold frame 2, one is provided with a wedge-shaped ring groove, and the other is provided with a wedge-shaped clamping ring for clamping into the wedge-shaped ring groove. Here, the bottom mold 5 is regarded as one alone, and the left mold frame 1 and the right mold frame 2 are regarded as the other as a whole.

[0038] The mold opening and closing cam rotor 9 is rotatably arranged on the mold opening and closing rotor arm 10 around its own axis. In this embodiment, the axis of the mold opening and closing cam rotor 9 is parallel to the first axis 17 and extends in the vertical direction. Driven by the mold opening and closing cam, the mold opening and closing cam rotor 9 is used to drive the mold opening and closing rotor arm 10 to swing. 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 rotatably arranged on the mold frame bracket 7 around its own axis. In this embodiment, the axis of the mold opening and closing swing shaft 11 is parallel to the first axis 17 and extends in the vertical direction. There are two mold opening and closing connecting rods 4, the two ends of one mold opening and closing connecting rod 4 are respectively hinged to the mold opening and closing swing arm 3 and the cylinder of the left mold frame 1 that can be hinged and rotated on the mold frame bracket 7, and the two ends of the other mold opening and closing connecting rod 4 are respectively hinged to the mold opening and closing swing arm 3 and the cylinder of the right mold frame 2 that can be hinged and rotated on the mold frame bracket 7. When the mold opening and closing rotor arm 10 swings (i.e. swings around the axis direction of the mold opening and closing swing shaft 11), it is used to drive the left mold frame 1 and the right mold frame 2 to open and close.

[0039] The auxiliary rotating arm 12 is fixedly connected to the mold opening and closing rotor arm 10 or the left mold frame 1 or the right mold frame 2. The two ends of the spatial connecting rod 13 are respectively spherically hinged to the auxiliary rotating arm 12 and the bottom mold swing rod 14 through the joint bearing, and the two ends of the spatial connecting rod 13 are respectively fixedly connected to the two joint bearings. The bottom mold bracket 8 is fixedly arranged on the mold frame bracket 7. The bottom mold swing rod 14 can rotate around an axis on the bottom mold bracket 8. One end of the bottom mold crank 15 is fixedly connected to the bottom mold swing rod 14, and the other end is cylindrically hinged to the bottom mold pull rod 16. The bottom mold pull rod 16 is cylindrically hinged to the bottom mold 5. The bottom mold 5 can slide up and down on the bottom mold guide rail 6 fixedly connected to the bottom mold bracket 8. When the mold opening and closing rotor arm 10 swings (i.e. swings around the axis of the mold opening and closing swing shaft 11), it is used to drive the bottom mold 5 to move up and down. The angle between the bottom mold swing rod 14 and the bottom mold crank 15 is α, where 0°≤α≤180°.

[0040] In this embodiment, the left end of the spatial link 13 is spherically hinged to the auxiliary swing arm 12 through a joint bearing, the right end of the spatial link 13 is spherically hinged to the upper end of the bottom mold swing rod 14 through a joint bearing, the lower end of the bottom mold crank 15 is fixedly connected to the lower end of the bottom mold swing rod 14, and the lower end of the bottom mold swing rod 14 is cylindrically hinged to the bottom mold bracket 8, that is, after the lower end of the bottom mold swing rod 14 is fixedly connected to the lower end of the bottom mold crank 15 (the bottom mold swing rod 14 and the bottom mold crank 15 are fixed to each other at an angle between 0° and 90° to form a whole), the whole cylinder is then hinged to the bottom mold bracket 8. The upper end cylinder of the bottom mold crank 15 is hinged to the lower end of the bottom mold tie rod 16, and the upper end of the bottom mold tie rod 16 is cylindrically hinged to the bottom mold 5. The movements of the bottom mold swing rod 14, the bottom mold crank 15, and the bottom mold tie rod 16 are located in the same vertical plane.

[0041] The link mechanism composed of the mold opening and closing rotor arm 10 or the left mold frame 1 or the right mold frame 2 and the auxiliary rotating arm 12 fixedly connected to one of them, the mold frame bracket 7 and the bottom mold bracket 8 fixedly connected thereto, the spatial connecting rod 13, and the bottom mold swing rod 14 is a type of spatial four-bar linkage mechanism; in the spatial four-bar linkage mechanism, the movement plane of the mold opening and closing rotor arm 10 or the left mold frame 1 or the right mold frame 2 and the auxiliary rotating arm 12 fixedly connected to one of them is perpendicular to the movement plane of the bottom mold swing rod 14; the movement plane of the mold opening and closing rotor arm 10 or the left mold frame 1 or the right mold frame 2 and the auxiliary rotating arm 12 fixedly connected to one of them is a horizontal plane, and the movement plane of the bottom mold swing rod 14 is a vertical plane;

[0042] In this embodiment, the spatial four-bar linkage is a linkage mechanism composed of a mold opening and closing rotor arm 10 and an auxiliary rotating arm 12 fixed thereon, a mold frame bracket 7 and a bottom mold bracket 8 fixed thereon, a spatial connecting rod 13, and a bottom mold swing rod 14; the movement planes of the mold opening and closing rotor arm 10 and the auxiliary rotating arm 12 fixed thereon and the movement plane of the bottom mold swing rod 14 are perpendicular to each other;

[0043] The connecting rod mechanism composed of the bottom mold crank 15, the bottom mold pull rod 16, the bottom mold 5, the bottom mold bracket 8 and the bottom mold guide rail 6 fixed thereon is a type of plane crank slider mechanism;

[0044] The above-mentioned spatial four-link mechanism and the above-mentioned plane crank slider mechanism are connected in series to form a series-type combined connecting rod bottom mold lifting mechanism.

[0045] In this embodiment, the link mechanism composed of the left mold frame 1 or the right mold frame 2, the mold opening and closing connecting rod 4, the mold opening and closing swing arm 3 and the mold opening and closing rotor arm 10 fixedly connected to the mold opening and closing swing shaft 11, and the mold frame bracket 7 is a type of planar four-bar linkage;

[0046] The combination of the series-type combined connecting rod type bottom mold lifting mechanism and the planar four-link mechanism forms a full-connecting rod type combined connecting rod mechanism in which the opening and closing of the mold of the bottle blowing machine is linked with the bottom mold.

[0047] In the second embodiment, the spatial four-bar linkage is a linkage mechanism consisting of a left mold frame 1 and an auxiliary rotating arm 12 fixed thereto, a mold frame bracket 7 and a bottom mold bracket 8 fixed thereto, a spatial connecting rod 13, and a bottom mold swing rod 14; the movement plane of the left mold frame 1 and the auxiliary rotating arm 12 fixed thereto is perpendicular to the movement plane of the bottom mold swing rod 14.

[0048] In the third embodiment, the spatial four-bar linkage is a linkage mechanism consisting of a right mold frame 2 and an auxiliary rotating arm 12 fixed thereto, a mold frame bracket 7 and a bottom mold bracket 8 fixed thereto, a spatial connecting rod 13, and a bottom mold swing rod 14; the movement plane of the right mold frame 2 and the auxiliary rotating arm 12 fixed thereto is perpendicular to the movement plane of the bottom mold swing rod 14.

[0049] In the fourth embodiment, the left end of the spatial link 13 is spherically hinged to the auxiliary swing arm 12 through a joint bearing, the right end of the spatial link 13 is spherically hinged to the lower end of the bottom mold swing arm 14 through a joint bearing, the lower end of the bottom mold crank 15 is fixedly connected to the upper end of the bottom mold swing arm 14, and the upper end of the bottom mold swing arm 14 is cylindrically hinged to the bottom mold bracket 8, that is, after the upper end of the bottom mold swing arm 14 is fixedly connected to the lower end of the bottom mold crank 15 (the bottom mold swing arm 14 and the bottom mold crank 15 are fixed to each other at an angle between 90° and 180° to form a whole), the whole cylinder is then hinged to the bottom mold bracket 8. The upper end cylinder of the bottom mold crank 15 is hinged to the lower end of the bottom mold tie rod 16, and the upper end of the bottom mold tie rod 16 is cylindrically hinged to the bottom mold 5. The movements of the bottom mold swing arm 14, the bottom mold crank 15, and the bottom mold tie rod 16 are located in the same vertical plane.

[0050] In the early stage of mold opening, the angle α between the bottom mold swing rod 14 and the space connecting rod 13 is an acute angle, and the angle β between the auxiliary rotating arm 12 and the space connecting rod 13 is an obtuse angle; in the late stage of mold opening, the angle α between the bottom mold swing rod 14 and the space connecting rod 13 is an obtuse angle, and the angle β between the auxiliary rotating arm 12 and the space connecting rod 13 is an acute angle;

[0051] In the initial stage of mold closing, the angle α between the bottom mold swing rod 14 and the space connecting rod 13 is an obtuse angle, and the angle β between the auxiliary rotating arm 12 and the space connecting rod 13 is an acute angle; in the later stage of mold closing, the angle α between the bottom mold swing rod 14 and the space connecting rod 13 is an acute angle, and the angle β between the auxiliary rotating arm 12 and the space connecting rod 13 is an obtuse angle;

[0052] When the bottom mold 5 is located at the upper starting point, the bottom mold crank 15 and the bottom mold pull rod 16 form an approximately straight line shape with an angle of 170°-180°.

[0053] Through this setting, the tandem combined link bottom mold lifting mechanism has a high sensitivity state and a low sensitivity state:

[0054] In the initial stage of mold opening and the later stage of mold closing, during the above two periods, α and β are acute angles or obtuse angles, and the serial combined connecting rod type bottom mold lifting mechanism is in a low sensitivity state; because the serial combined connecting rod type bottom mold lifting mechanism is in a low sensitivity state, when the mold opening and closing rotor arm 10 swings, the bottom mold 5 has a very small displacement in the vertical direction; therefore, in the initial stage of mold opening or the later stage of mold closing, before the wedge-shaped retaining ring is separated from the wedge-shaped ring groove or after it enters the wedge-shaped ring groove, the displacement of the bottom mold 5 is smaller than the gap between the wedge-shaped retaining ring and the wedge-shaped ring groove;

[0055] In the middle of mold opening and mold closing, during the above two periods, α and β are close to 90°, and the series-type combined connecting rod bottom mold lifting mechanism is in a highly sensitive state; because the series-type combined connecting rod bottom mold lifting mechanism is in a highly sensitive state, when the mold opening and closing rotor arm 10 swings, the bottom mold 5 has a large displacement in the vertical direction, realizing the rapid descent and rapid rise of the bottom mold 5. By controlling the angles of α and β, the bottom mold 5 forms an approximate rest period of movement in the early stage of mold opening and the late stage of mold closing, avoiding collision and damage with the left mold frame 1 and the right mold frame 2.

[0056] See also Figure 3 As shown, the X axis is the rotation angle of the bottle blowing machine, the Y1 axis is the vertical displacement of the bottom mold 5, the Y2 axis is the opening and closing angle of the left mold frame 1 and the right mold frame 2, O is the mold opening starting point, A is the mold closing end point, B is the upper starting point of the bottom mold 5, and C is the angle between the left mold frame 1 and the right mold frame 2 when the wedge-shaped clamping ring is separated from the wedge-shaped ring groove or enters the wedge-shaped ring groove. Figure 3It can be seen that in the early stage of mold opening and the late stage of mold closing, with the swing of the mold opening and closing rotor arm 10, the displacement change of the bottom mold 5 in the vertical direction is very small, while in the middle stage of mold opening and the middle stage of mold closing, with the swing of the mold opening and closing rotor arm 10, the bottom mold 5 has a large displacement change in the vertical direction.

[0057] At the initial stage of mold opening, the tandem combined connecting rod bottom mold lifting mechanism is in a low-sensitivity state, and the left mold frame 1 and the right mold frame 2 are gradually opened by the mold opening and closing rotor arm 10, until the wedge-shaped ring groove and the wedge-shaped clamping ring are completely separated, and the displacement of the bottom mold 5 controlled by the tandem combined connecting rod bottom mold lifting mechanism is smaller than the gap between the wedge-shaped clamping ring and the wedge-shaped ring groove, forming an approximate rest period of the movement of the bottom mold 5;

[0058] In the late stage of mold closing, the serial combined connecting rod bottom mold lifting mechanism is in a low-sensitivity state, and the left mold frame 1 and the right mold frame 2 are gradually closed by the mold opening and closing rotor arm 10. After the wedge-shaped clamping ring enters the wedge-shaped ring groove until it is completely aligned, the serial combined connecting rod bottom mold lifting mechanism controls the displacement of the bottom mold 5 to be smaller than the gap between the wedge-shaped clamping ring and the wedge-shaped ring groove, forming an approximate rest period of the movement of the bottom mold 5;

[0059] In the middle stage of mold opening, the serial combined connecting rod bottom mold lifting mechanism is in a highly sensitive state, which is used to control the bottom mold 5 to descend with a large displacement;

[0060] In the middle stage of mold closing, the serial combined connecting rod bottom mold lifting mechanism is in a high-sensitivity state, which is used to control the bottom mold 5 to rise to a larger displacement.

[0061] In the middle and late stages of mold opening, the series-type combined connecting rod bottom mold lifting mechanism controls the movement of the bottom mold 5 and the movement of the bottle taken by the bottle taking mechanism without geometric interference;

[0062] In the middle and late stages of mold closing, the tandem combined connecting rod bottom mold lifting mechanism controls the movement of the bottom mold 5 and the movement of the preforms delivered by the preform delivery mechanism without geometric interference.

[0063] The working process of this embodiment is described in detail below:

[0064] When opening the mold, the mold opening and closing cam drives the mold opening and closing rotor arm 10 to swing forward, driving the mold opening and closing mold frames (left mold frame 1 and right mold frame 2) to open the mold. Before the wedge-shaped clamping ring is separated from the wedge-shaped ring groove, the series-type combined connecting rod type bottom mold lifting mechanism is in a low-sensitivity state, and the bottom mold 5 is in a nearly resting period of movement. After the wedge-shaped clamping ring is separated from the wedge-shaped ring groove, the series-type combined connecting rod type bottom mold lifting mechanism will enter a high-sensitivity state, and the bottom mold 5 will drop a large displacement until the mold opening is completed;

[0065] When closing the mold, the mold opening and closing cam drives the mold opening and closing rotor arm 10 to swing in the opposite direction, driving the mold opening and closing mold frames (left mold frame 1 and right mold frame 2) to close the mold, and the serial combined connecting rod type bottom mold lifting mechanism will enter a high-sensitivity state, and the bottom mold 5 will rise a large displacement. As the mold opening and closing rotor arm 10 continues to swing, the serial combined connecting rod type bottom mold lifting mechanism enters a low-sensitivity state. After the wedge-shaped retaining ring enters the wedge-shaped ring groove, the bottom mold 5 is in an approximate rest period of movement until the mold closing is completed.

[0066] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it. They cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A full-linkage combined connecting rod mechanism for the opening and closing of a mold and the bottom mold of a bottle blowing machine, comprising a left mold frame, a right mold frame, an opening and closing mold swing arm, an opening and closing mold connecting rod, a bottom mold, a bottom mold guide rail, a mold frame bracket, a bottom mold bracket, an opening and closing mold cam rotor, an opening and closing mold rotor arm, an opening and closing mold swing shaft, an auxiliary rotating arm, a space connecting rod, a bottom mold swing rod, a bottom mold crank and a bottom mold pull rod; The mold opening and closing cam rotor is rotatably arranged on the mold opening and closing rotor arm around its own axis, and is used to drive the mold opening and closing rotor arm to swing 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 mold opening and closing swing shaft rotatably arranged on the mold frame bracket around its own axis. The two ends of the mold opening and closing connecting rod are respectively hinged to the mold opening and closing swing arm and the left mold frame / right mold frame cylindrical surface that can be hinged and rotated on the mold frame bracket. When the mold opening and closing rotor arm swings, it is used to drive the left mold frame and the right mold frame to perform opening and closing movements; The auxiliary rotating arm is fixedly connected to the mold opening and closing rotor arm or the left mold frame or the right mold frame, and the two ends of the spatial connecting rod are respectively spherically hinged to the auxiliary rotating arm and the bottom mold swing rod through the joint bearings fixedly connected thereto. The bottom mold bracket is fixedly arranged on the mold frame bracket, and the bottom mold swing rod can rotate around an axis on the bottom mold bracket. One end of the bottom mold crank is fixedly connected to the bottom mold swing rod, and the other end is cylindrically hinged to the bottom mold pull rod. The bottom mold pull rod is cylindrically hinged to the bottom mold. The bottom mold can slide on the bottom mold guide rail fixedly connected to the bottom mold bracket. When the mold opening and closing rotor arm swings, it is used to drive the bottom mold to perform lifting movement; Features: The link mechanism composed of the mold opening and closing rotor arm or the left mold frame or the right mold frame and the auxiliary rotating arm fixed thereon, the mold frame bracket and the bottom mold bracket fixed thereon, the spatial connecting rod, and the bottom mold swing rod is a type of spatial four-bar linkage mechanism; in the spatial four-bar linkage mechanism, the movement plane of the mold opening and closing rotor arm or the left mold frame or the right mold frame and the auxiliary rotating arm fixed thereon is perpendicular to the movement plane of the bottom mold swing rod; The connecting rod mechanism composed of the bottom mold crank, the bottom mold pull rod, the bottom mold, the bottom mold bracket and the bottom mold guide rail fixed thereon is a type of plane crank slider mechanism; The series connection of the spatial four-bar linkage and the planar crank slider mechanism forms a series-type combined-linkage bottom mold lifting mechanism; The link mechanism formed by the left mold frame or the right mold frame, the mold opening and closing connecting rod, the mold opening and closing swing arm, the mold opening and closing rotor arm fixedly connected to the mold opening and closing swing shaft, and the mold frame bracket is a type of planar four-bar link mechanism; The combination of the series-type combined-link bottom mold lifting mechanism and the planar four-link mechanism forms a full-link combined-link mechanism in which the mold opening and closing of the bottle blowing machine is linked with the bottom mold; In the initial stage of mold opening, the angle between the bottom mold swing arm and the space connecting rod is an acute angle, and the angle between the auxiliary rotating arm and the space connecting rod is an obtuse angle; in the later stage of mold opening, the angle between the bottom mold swing arm and the space connecting rod is an obtuse angle, and the angle between the auxiliary rotating arm and the space connecting rod is an acute angle; In the initial stage of mold closing, the angle between the bottom mold swing arm and the space connecting rod is an obtuse angle, and the angle between the auxiliary rotating arm and the space connecting rod is an acute angle; in the later stage of mold closing, the angle between the bottom mold swing arm and the space connecting rod is an acute angle, and the angle between the auxiliary rotating arm and the space connecting rod is an obtuse angle; When the bottom mold is at the upper starting point, the bottom mold crank and the bottom mold pull rod form an angle of 170° - Approximate straight line shape between -180°; One of the bottom mold and the left mold frame / right mold frame is provided with a wedge-shaped ring groove, and the other is provided with a wedge-shaped clamping ring for clamping into the wedge-shaped ring groove; The series-type combined connecting rod bottom mold lifting mechanism has a high sensitivity state and a low sensitivity state; At the initial stage of mold opening, the series-type combined connecting rod type bottom mold lifting mechanism is in the low-sensitivity state, and the left mold frame and the right mold frame are gradually opened by the mold opening and closing rotor arm, until the wedge-shaped ring groove and the wedge-shaped clamping ring are completely separated, and the series-type combined connecting rod type bottom mold lifting mechanism controls the displacement of the bottom mold to be smaller than the gap between the wedge-shaped clamping ring and the wedge-shaped ring groove, forming an approximate rest period of the bottom mold movement; At the late stage of mold closing, the series-type combined connecting rod bottom mold lifting mechanism is in the low-sensitivity state, and the left mold frame and the right mold frame are gradually closed by the mold opening and closing rotor arm. After the wedge-shaped clamping ring enters the wedge-shaped ring groove until it is fully engaged, the series-type combined connecting rod bottom mold lifting mechanism controls the displacement of the bottom mold to be smaller than the gap between the wedge-shaped clamping ring and the wedge-shaped ring groove, forming an approximate rest period of the bottom mold movement; In the middle stage of mold opening, the series-type combined connecting rod bottom mold lifting mechanism is in the high-sensitivity state, which is used to control the bottom mold to descend with a large displacement; In the middle stage of mold closing, the series-type combined connecting rod bottom mold lifting mechanism is in the high-sensitivity state, which is used to control the bottom mold to rise to a larger displacement.

2. According to claim 1, a full-link type combined connecting rod mechanism for opening and closing the mold of a bottle blowing machine and linking the bottom mold, characterized in that: In the middle and late stages of mold opening, the series-type combined connecting rod bottom mold lifting mechanism controls the movement of the bottom mold and the movement of the bottle taken by the bottle taking mechanism without geometric interference; In the middle and late stages of mold closing, the series-type combined connecting rod bottom mold lifting mechanism controls the movement of the bottom mold and the movement of the preforms delivered by the preform delivery mechanism without geometric interference.

3. According to claim 1, a full-link type combined connecting rod mechanism for opening and closing the mold of a bottle blowing machine and linking the bottom mold is characterized in that: The angle between the bottom mold rocker and the bottom mold crank is α, wherein 0°≤α≤180°.

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