A bottom die linkage mechanism for a double-action bottle blowing machine

Abstract

The application discloses a bottom die linkage mechanism for a double-opening die bottle blowing machine, which comprises a rack, a sliding block I, a sliding block II, guide columns I and II, a connecting rod and a driving part. The rack is provided with a guide groove, and the sliding block I can move up and down along the guide groove. The guide columns I and II are fixedly connected with the rack, the axes of the two guide columns are parallel and perpendicular to the direction of the guide groove on the rack, and the plane where the axes of the two guide columns are located is parallel to the direction of the guide groove on the rack. The sliding block II and the two guide columns form a moving pair, and the sliding block II can reciprocate left and right along the guide columns. The driving part is fixedly connected with one of the two side die racks. The connecting rod is rotatably connected with the driving part and the sliding block II, and converts the swing of the driving part into the reciprocating movement of the sliding block II. The sliding block I and the sliding block II are respectively provided with a cam and a roller, and the cam and the roller form a planar moving cam pair, which converts the reciprocating movement of the sliding block II left and right into the up-and-down movement of the sliding block I, so that the linkage of the side die and the bottom die is realized. The linkage mechanism is simple in structure, easy to manufacture and install and reliable in performance.

Description

Technical Field

[0001] This invention relates to the field of blow molding technology, and in particular to a bottom mold linkage mechanism for a double-mold blow molding machine. Background Technology

[0002] Blow molding machines are key equipment for producing bottles for various liquid packaging. The bottle blowing process of existing blow molding machines mainly consists of the following steps: unlocking the two side mold frames, opening the two side mold frames and lowering the bottom mold frame, bottle picking, preform feeding, closing the two side mold frames and raising the bottom mold frame, locking the two side mold frames, and blowing the bottle.

[0003] Currently, there are several technical solutions for raising and lowering the bottom formwork frame:

[0004] 1. The opening and closing of the two side mold frames are controlled by the opening and closing mold cams, and the lifting and lowering of the bottom mold frame is controlled by the bottom mold cam. The two work independently. This technical solution has high requirements for manufacturing, installation and debugging, and it is difficult to meet the requirements of high-speed blow molding. During the lifting and lowering of the bottom mold, the impact and noise between the bottom mold cam and the roller are relatively large.

[0005] One of the two side mold frames is connected to the bottom mold frame using a spatial cylindrical cam pair. When the side mold frame swings during mold opening, the bottom mold frame is driven to rise and fall through the spatial cylindrical cam pair, realizing the linkage between the bottom mold and the side mold. This technical solution does not add any extra moving parts, has a simple structure, and reliable transmission. However, the cylindrical cam pair has high manufacturing requirements and is relatively difficult to install and debug.

[0006] The bottom mold frame is connected to the swing arm of the opening and closing mold cam via a linkage mechanism or a linkage-cam combination mechanism. While the opening and closing mold cam drives the two side mold frames to open and close via the swing arm, the bottom mold frame is simultaneously driven to rise and fall via the aforementioned linkage mechanism or linkage-cam combination mechanism, achieving linkage between the bottom mold and the side molds. This technical solution requires two or more moving parts and necessitates spatial linkage transmission, resulting in a complex structure, motion, and stress conditions, making it difficult to guarantee reliability and service life. Furthermore, this technical solution, which uses the opening and closing mold cam swing arm to drive the bottom mold frame to rise and fall, does not achieve direct linkage between the bottom mold and the side molds. Summary of the Invention

[0007] The purpose of this invention is to provide a bottom mold linkage mechanism for a double-mold blow molding machine. It has a simple structure, low processing and installation difficulty, small dynamic load, and can effectively reduce the vibration and impact of the mechanism, enhance the smoothness and reliability of the blow molding machine, and improve the high-speed performance of the whole machine.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0009] A bottom mold linkage mechanism for a double-mold blow molding machine includes a frame, slider I, slider II, guide post I, guide post II, connecting rod, and driving component. The frame has a guide groove. Slider I is connected to the guide groove via a sliding joint and can move up and down along the guide groove. Guide post I and guide post II are fixedly connected to the frame, with their axes parallel and perpendicular to the direction of the guide groove. The plane containing the axes of the two guide posts is parallel to the direction of the guide groove. Slider II, together with guide post I and guide post II, forms a sliding joint and can reciprocate left and right along the guide post axis. The driving component is fixedly connected to one of the two side mold frames and oscillates synchronously with the connected side mold frame. The connecting rod is connected to the driving component and slider II via a rotary joint, converting the oscillation of the driving component into the reciprocating left and right movement of slider II.

[0010] The slider I and the slider II are respectively equipped with a cam and a roller. The cam and the roller form a planar moving cam pair. The planar moving cam pair is used to convert the left and right reciprocating movement of the slider II into the up and down movement of the slider I, thereby realizing the up and down lifting of the bottom mold frame connected to the slider I.

[0011] Preferably, when the two side mold holders are in the mold closing position, the slider II is in the right limit position, and correspondingly, the slider I is in the upper limit position;

[0012] When the two side mold frames swing open in opposite directions, the driving component swings with one of the two side mold frames, and drives the slider II to move from the right limit position to the left through the connecting rod. Then, the slider I is driven to move downward from the upper limit position through the planar moving cam pair, so as to realize the linkage between mold opening and the descent of the bottom mold frame.

[0013] Preferably, the connecting rod is a planar connecting rod, and the axis of the revolute joint formed by the connecting rod and the driving member is parallel to the axis of the revolute joint formed by the connecting rod and the slider II.

[0014] Preferably, in the planar moving cam pair, there are two rollers, and the cam is a flange cam, with the two side profiles of the flange abutting against the two rollers respectively.

[0015] More preferably, the flange is provided with a buffer post, which is located at the contact position between the flange and the roller when the mold is closed.

[0016] Preferably, in the planar moving cam pair, there are two rollers, and the cam is a grooved cam, with the two side profiles of the groove abutting against the two rollers respectively.

[0017] More preferably, the groove is provided with a buffer post, which is located at the contact position between the groove and the roller when the mold is closed.

[0018] Preferably, the cam is mounted on the slider I, and the two rollers are mounted on the slider II, wherein the slider I and the slider II form the planar moving cam pair.

[0019] Preferably, the cam is mounted on the slider II, and the two rollers are mounted on the slider I. The slider I and the slider II form the planar moving cam pair.

[0020] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0021] 1. The present invention provides a bottom mold linkage mechanism for a double-mold blow molding machine. The opening and closing of the side mold frame swings, which drives the driving component to swing. The slider II is driven to move horizontally through the planar connecting rod, and then the slider I (fixed to the bottom mold frame) is driven to rise and fall through the planar moving cam pair, thus realizing the direct linkage between the bottom mold and the side mold.

[0022] Planar connecting rods and planar cams are relatively easy to manufacture and install.

[0023] The slider II is connected to the side mold frame via a planar connecting rod, ensuring a reliable connection and easy installation.

[0024] Slider I (fixed bottom mold frame) and slider II are connected by a planar moving cam pair, ensuring accurate and reliable movement and long service life.

[0025] During the closing and locking process of the two side mold frames and the bottom mold frame, it is difficult for the position of the bottom mold frame to be completely consistent with the wedge-tightening locking position. This inconsistency will cause the bottom mold frame to lurch upwards or downwards at the moment of wedge-tightening locking, generating impact and noise. Using this technical solution, rubber buffer pillars can be installed at corresponding positions on the cam profile to eliminate the aforementioned impact and noise. Attached Figure Description

[0026] Appendix Figure 1 This is a schematic diagram of the bottom mold linkage mechanism according to a specific embodiment of the present invention;

[0027] Appendix Figure 2 This is a structural diagram of the frame components;

[0028] Appendix Figure 3 This is a schematic diagram of the structure of slider I;

[0029] Appendix Figure 4 This is a schematic diagram of the structure of slider II.

[0030] The components are: 1. Frame; 2. Guide post I; 3. Guide post II; 4. Cam; 5. Slider II; 6. Connecting rod; 7. Drive component; 8. Slider I; 9. Guide groove; 10. Flange; 11. Buffer post; 12. Roller; 13. Guide post hole; 14. Pin; 15. Side mold frame I; 16. Side mold frame II; 17. First shaft. Detailed Implementation

[0031] The technical solution of the present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0032] See Figure 2 As shown, the frame 1 is provided with a guide groove 9 extending in the vertical direction. The guide posts I2 and II3, which are parallel to each other and extend in the left and right directions respectively, are fixedly connected to the frame 1. The axes of the two guide posts are parallel and perpendicular to the direction of the guide groove 9. The plane containing the axes of the two guide posts is a vertical plane and is parallel to the direction of the guide groove 9.

[0033] See Figure 3 As shown, slider I8 (fixed to the bottom mold frame) and guide groove 9 on frame 1 form a sliding pair, allowing slider I8 to move up and down along guide groove 9 on frame 1; cam 4 is a planar sliding cam, fixedly connected to slider I8 by screws (not shown in the figure); cam 4 has a flange 10, and a rubber buffer post 11 is mounted on the flange 10. The position of the buffer post 11 corresponds to the contact position between flange 10 and roller 12 (see below) when the side mold and bottom mold wedge are tightly locked (i.e. Figure 3 (Lower right end of the central flange 10). In this embodiment, there are two rollers 12, which abut against the two side profiles of the flange 10 respectively.

[0034] See Figure 4 As shown, slider II5 has two guide pin holes 13 with parallel axes. The two guide pin holes 13 cooperate with guide pin I2 and guide pin II3 on ​​frame 1, so that slider II5 can move horizontally along the two guide pins on frame 1. Two rollers 12 are movably mounted on slider II5. The axes of the two rollers 12 are parallel to each other. The relative position of the two rollers 12 ensures that the two rollers 12 can maintain direct contact with the two side profiles of flange 10 on cam 4. Pin 14 is fixedly mounted on slider II5. When the two guide pin holes 13 on slider II5 cooperate with guide pin I2 and guide pin II3 on ​​frame 1 respectively, the axis of pin 14 is parallel to guide groove 9 on frame 1.

[0035] See Figure 1As shown, the side mold holders I15 and II16 are connected to the frame 1 via a first shaft 17 rotating joint and can swing around the first shaft 17; the drive member 7 is fixedly connected to the side mold holder I15 and swings accordingly when the side mold holders open and close; the slider I8 is connected to the frame 1 via a guide groove 9 sliding joint and can move up and down relative to the frame 1 along the guide groove 9; the slider II5 is engaged with the guide post I2 and guide post II3 fixedly connected to the frame 1 via two guide post holes 13 and can move left and right in the horizontal direction relative to the frame 1 along the two guide posts; in the above assembly of slider I8 and slider II5, the two rollers 12 on slider II5 can maintain direct contact with the two side profiles of the flange 10 of the cam 4 fixedly connected to slider I8; ​​the left end of the connecting rod 6 is connected to the lower end of the drive member 7 rotating joint and the right end of the connecting rod 6 is connected to the pin 14 rotating joint on slider II5.

[0036] Therefore, when the side mold frame I15 opens and swings, the drive component 7 swings with the side mold frame I15, and drives the slider II5 to move horizontally through the connecting rod 6. Then, through the planar moving cam pair formed by the roller 12 and the two side profiles of the flange 10, the slider I8 (fixed to the bottom mold frame) is driven to move up and down, thereby realizing the direct linkage between the side mold and the bottom mold. When the side mold frame I15 and the side mold frame II16 are closed, the slider I8 (fixed to the bottom mold frame) is located at the upper limit position. At this time, the two rollers 12 are in contact with the buffer column 11 installed at the lower right end of the flange 10.

[0037] It is worth noting that the following situations are merely simple mechanics evolutions of this embodiment and should all be covered within the protection scope of this invention:

[0038] 1. In the planar moving cam pair, cam 4 is mounted on slider II 5, and roller 12 is mounted on slider I 8;

[0039] 2. The planar moving cam pair adopts a groove structure instead of a flange structure;

[0040] 3. The driving component 7 is fixedly connected to the side mold frame II16;

[0041] 4. Change the rotating joint connection between connecting rod 6 and drive component 7 to a rotating joint connection between connecting rod 6 and mold opening / closing cam swing arm. In this way, while driving the two side mold frames to open and close, the mold opening / closing cam swing arm can drive slider II5 to move horizontally left and right through connecting rod 6. Then, through the planar moving cam joint, slider I8 (fixed to the bottom mold frame) is driven to move up and down, thereby indirectly realizing the linkage between the side mold and the bottom mold.

[0042] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A bottom die linkage mechanism for a double-action bottle blowing machine, comprising a frame, a slider I, a slider II, a guide column I, a guide column II, a connecting rod and a driving member, characterized in that: The rack is provided with a guide groove, the sliding block I is connected with the guide groove through a moving pair, and can move up and down along the guide groove; the guide column I and the guide column II are fixedly connected with the rack, the axes of the two guide columns are parallel and perpendicular to the direction of the guide groove, and the plane where the axes of the two guide columns are located is parallel to the direction of the guide groove; the sliding block II is connected with the guide column I and the guide column II through a moving pair, and can move back and forth along the axes of the guide columns; the driving piece is fixedly connected with one of the two side mold frames, and synchronously swings with the connected side mold frame; the connecting rod is connected with the driving piece and the sliding block II through rotating pairs, and is used for converting the swing of the driving piece into the back-and-forth movement of the sliding block II. The sliding block I and the sliding block II are respectively provided with a cam and a roller, the cam and the roller form a plane moving cam pair, and the plane moving cam pair is used for converting the back-and-forth movement of the sliding block II into the up-and-down movement of the sliding block I, so that the up-and-down lifting of the bottom mold frame connected with the sliding block I is realized. The connecting rod is a plane connecting rod, the axes of the rotating pairs formed by the connecting rod and the driving piece and the connecting rod and the sliding block II are parallel to each other. A pin shaft is fixedly arranged on the sliding block II, and the axis of the pin shaft is parallel to the guide groove; the left end of the connecting rod is connected with the lower end of the driving piece through a rotating pair, and the right end of the connecting rod is connected with the pin shaft on the sliding block II through a rotating pair.

2. A bottom mold linkage mechanism for a double-action bottle blowing machine according to claim 1, characterized in that: When the two side mold frames are in a closed position, the sliding block II is in a right limit position, and correspondingly, the sliding block I is in an upper limit position. When the two side mold frames swing in opposite directions to be opened, the driving piece swings with one of the two side mold frames, the sliding block II is driven to move from the right limit position to the left through the connecting rod, and then the sliding block I is driven to move from the upper limit position to the lower position through the plane moving cam pair, so that the opening of the mold and the lowering of the bottom mold frame are linked.

3. A bottom mold linkage mechanism for a double-action bottle blowing machine according to claim 1, characterized in that: In the plane moving cam pair, the roller has two, and the cam is a flange cam, and the two sides of the flange profile are respectively in contact with the two rollers.

4. A bottom mold linkage mechanism for a double-action bottle blowing machine according to claim 3, characterized in that: The flange is provided with a buffer column, and the buffer column is located at the contact position of the flange and the roller when the mold is closed.

5. A bottom mold linkage mechanism for a double-action bottle blowing machine according to claim 1, characterized in that: In the plane moving cam pair, the roller has two, and the cam is a groove cam, and the two sides of the groove profile are respectively in contact with the two rollers.

6. A bottom mold linkage mechanism for a double-action bottle blowing machine according to claim 5, characterized in that: The groove is provided with a buffer column, and the buffer column is located at the contact position of the groove and the roller when the mold is closed.

7. A draw 1 linkage mechanism for a double-action bottle blowing machine according to claim 1, characterized in that: The cam is arranged on the sliding block I, the two rollers are arranged on the sliding block II, and the sliding block I and the sliding block II form the plane moving cam pair.

8. A draw 1 linkage mechanism for a double-action bottle blowing machine according to claim 1, characterized in that: The cam is arranged on the sliding block II, the two rollers are arranged on the sliding block I, and the sliding block I and the sliding block II form the plane moving cam pair.

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