A mold locking device for a side mold frame of a bottle blowing machine

Abstract

The application discloses a mold locking device of a bottle blowing machine side mold frame. The bottle blowing machine mold frame comprises a first shaft, a first side mold and a second side mold which can be opened and closed relative to each other. The mold locking device comprises a fixed buckle arranged on the first side mold, a movable buckle arranged on the second side mold and a movable buckle driving mechanism. The fixed buckle and the movable buckle are used for locking each other at a mold closing position. The movable buckle driving mechanism comprises an eccentric shaft and a swing rod / guide block, and is used for driving the movable buckle and the fixed buckle to lock each other or not to lock each other. The eccentric shaft is parallel to the first shaft and movably arranged on the second side mold and can rotate relative to the second side mold. When the eccentric shaft rotates in one direction, the swing rod or the guide block is used for driving the movable buckle and the fixed buckle to lock and be pulled tight, so that the locking is realized. When the eccentric shaft rotates in another direction, the swing rod or the guide block is used for driving the movable buckle and the fixed buckle to be relaxed and separated, so that the unlocking is realized. The mold locking device of the bottle blowing machine side mold frame can realize zero-gap locking of a side mold of a plastic container.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bottle blowing machine, in particular to a mold locking device of a rotary bottle blowing machine side mold frame. BACKGROUND

[0002] The forming mold group of the rotary bottle blowing machine for forming a plastic container from a plastic blank comprises a machine frame, an open-close mold rotating shaft arranged on the machine frame, two side mold frames capable of rotating around the open-close mold rotating shaft or at least one of them, a bottom mold frame capable of moving along the axial direction of the machine frame, two split side molds of the plastic container supported by the two side mold frames, and a bottom mold of the plastic container supported by the bottom mold frame, etc.

[0003] The two side mold frames and the bottom mold frame are folded to form a hollow cavity with the two split side molds and the bottom mold of the plastic container, and the plastic blank can be formed into a plastic container by using the hollow cavity; the two side mold frames and the bottom mold frame are opened to take out the formed plastic container and send the plastic blank to be formed.

[0004] The side mold frame opening and closing locking device of the rotary bottle blowing machine locks the two side mold frames to each other to achieve the locking of the two side mold frames during the folding of the two side mold frames to form a plastic container from a plastic blank; and the mutual locking of the two side mold frames is released to achieve the opening of the two side mold frames before the two side mold frames are opened to take out the formed plastic container and send the plastic blank to be formed.

[0005] In the prior art, a pair of fixed and movable buckles are used to achieve the mutual locking and unlocking of the two side mold frames. The fixed buckle is fixedly connected with one side mold frame, and the movable buckle is connected with the rotating pair of the other side mold frame. In the closed mold state of the two side mold frames, the opening or locking can only be achieved by the relative rotation of the movable buckle relative to the fixed buckle. In order to make the bearing surface of the movable buckle and the bearing surface of the fixed buckle fit each other in the locked state, the normal line at the center of the bearing surface of the movable buckle cannot pass through the axis of the movable buckle rotating shaft, which makes the movable buckle bear a large torque during the bottle blowing process. In order to prevent the movable buckle from being unlocked under the action of the above-mentioned torque, a torsional spring with a large torque must be used to balance the above-mentioned torque, which increases the difficulty of opening and locking, and there is a risk of unlocking and bottle explosion. In addition, since the opening and locking are achieved only by the rotation of the movable buckle relative to the fixed buckle, and manufacturing and assembly deviations are inevitable, it is difficult to achieve zero-gap locking of the side mold of the plastic container. SUMMARY

[0006] The purpose of the present application is to provide a mold locking device of a bottle blowing machine, which can achieve zero-gap locking of the side mold of the plastic container, and has a simple structure, reliable operation, and convenient manufacturing and assembly.

[0007] To achieve the above-mentioned purpose, the technical solution adopted by the present application is as follows:

[0008] A mold locking device of a side mold frame of a bottle blowing machine, the plastic container forming mold module of the bottle blowing machine comprises a first shaft, a first side mold and a second side mold which are openable and closable relative to each other for supporting a plastic container side mold, at least one of the first side mold and the second side mold is rotatable around the first shaft, characterized in that the mold locking device comprises a fixed buckle fixedly arranged on the first side mold, a movable buckle arranged on the second side mold and a movable buckle driving mechanism; the fixed buckle and the movable buckle are used for being buckled with each other at a mold closing position, and the movable buckle is buckled outside the fixed buckle; the movable buckle driving mechanism comprises an eccentric shaft and a swing rod / guide block, and is used for driving the movable buckle and the fixed buckle to be buckled / unbuckled with each other.

[0009] The eccentric shaft is parallel to the first shaft and movably arranged on the second side mold and rotatable relative to the second side mold; when the eccentric shaft rotates in one direction, the movable buckle and the fixed buckle are buckled and pulled tight by the swing rod or the guide block, the relative movement of the first side mold and the second side mold is prevented, and the locking is achieved; when the eccentric shaft rotates in the other direction, the movable buckle and the fixed buckle are released and separated by the swing rod or the guide block, the relative movement of the first side mold and the second side mold is allowed, and the unlocking is achieved.

[0010] Preferably, the fixed buckle and the movable buckle respectively have “L”-shaped hook portions, and the bearing surfaces of the two groups of hook portions are in close contact with each other in the locked state.

[0011] Preferably, the eccentric shaft comprises a plurality of shaft segments with different diameters which are distributed at intervals, the shaft segments with one diameter are coaxial with a main shaft body and form a rotating pair with the second side mold, the shaft segments with the other diameter are coaxial with an eccentric shaft body and form a rotating pair with the movable buckle, and the axes of the main shaft body and the eccentric shaft body are parallel but offset by a distance.

[0012] More preferably, the movable buckle is provided with an “L”-shaped hook portion at one end, an axle hole matched with the eccentric shaft body at the middle, and an axle matched with the swing rod or a roller in high pair contact with the guide block at the other end.

[0013] Preferably, the swing rod is rotatably connected to the second side mold and the movable buckle at both ends.

[0014] Preferably, the guide block is fixedly connected to the second side mold and in high pair connection with the movable buckle.

[0015] Preferably, the movable buckle driving mechanism, which consists of the movable buckle, the eccentric shaft, the swing rod, and the second side mold, is a planar four-bar linkage. The movable buckle is the connecting rod of the planar four-bar linkage and performs planar motion. When the eccentric shaft rotates in one direction relative to the second side mold, the movable buckle will both swing and move to lock and tighten with the fixed buckle, thereby achieving zero-gap locking of the side mold of the plastic container.

[0016] Preferably, the movable buckle driving mechanism, which consists of a movable buckle, an eccentric shaft, a guide block, and a second side mold, is a planar high-pair mechanism. When the mechanism moves, the movable buckle performs a planar motion that involves both moving and swinging. When the eccentric shaft rotates in one direction relative to the second side mold, the movable buckle will both swing and move to lock and tighten with the fixed buckle, thereby achieving zero-gap locking of the side mold of the plastic container.

[0017] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0018] 1) The mold locking device of the side mold frame of the blow molding machine of the present invention has a movable buckle driven by a movable buckle driving mechanism, which makes a planar movement that both swings and moves. When locked, the bearing surface of the movable buckle can be in contact with and pressed against the bearing surface of the fixed buckle, thereby achieving zero-gap locking of the side mold of the plastic container.

[0019] 2) In the mold locking device of the side mold frame of the blow molding machine of the present invention, the normal line of the centroid of the bearing surface of the movable buckle passes through or is close to the axis of the rotating pair formed by the movable buckle and the eccentric shaft in the locked state, and the movable buckle and the eccentric shaft are at or close to the dead point position, without the need to use a large torque torsion spring to maintain the locked state, and the installation and maintenance are convenient.

[0020] 3) The mold locking device of the side mold frame of the blow molding machine of the present invention has a simple structure, reliable operation, regular shape of each part, and is easy to manufacture. Attached Figure Description

[0021] Appendix Figure 1 This is a schematic diagram (unlocked state) of the mold locking device of the side mold frame of a blow molding machine according to a specific embodiment of the present invention;

[0022] Appendix Figure 2 This is a front view (unlocked state) of the mold locking device of the side mold frame of a blow molding machine according to a specific embodiment of the present invention;

[0023] Appendix Figure 3 For the appendix Figure 2 A sectional view along line AA.

[0024] Appendix Figure 4 For the appendix Figure 2 Sectional view along line BB;

[0025] Appendix Figure 5Fig. 2 is a schematic structural view of the mold locking device of the side mold frame of the bottle blowing machine according to the second embodiment of the present application (unlocked state);

[0026] Fig. 1 is a schematic structural view of the mold locking device of the side mold frame of the bottle blowing machine according to the first embodiment of the present application (unlocked state); Figure 6 Fig. 2 is a schematic structural view of the mold locking device of the side mold frame of the bottle blowing machine according to the second embodiment of the present application (unlocked state);

[0027] Fig. 1 is a schematic structural view of the mold locking device of the side mold frame of the bottle blowing machine according to the first embodiment of the present application (unlocked state); Figure 7 Fig. 2 is a schematic structural view of the mold locking device of the side mold frame of the bottle blowing machine according to the second embodiment of the present application (unlocked state); Figure 6 Fig. 1 is a schematic structural view of the mold locking device of the side mold frame of the bottle blowing machine according to the first embodiment of the present application (unlocked state);

[0028] Fig. 1 is a schematic structural view of the mold locking device of the side mold frame of the bottle blowing machine according to the first embodiment of the present application (unlocked state); Figure 8 Fig. 2 is a schematic structural view of the mold locking device of the side mold frame of the bottle blowing machine according to the second embodiment of the present application (unlocked state); Figure 6 Fig. 1 is a schematic structural view of the mold locking device of the side mold frame of the bottle blowing machine according to the first embodiment of the present application (unlocked state);

[0029] Fig. 1 is a schematic structural view of the mold locking device of the side mold frame of the bottle blowing machine according to the first embodiment of the present application (unlocked state); Figure 9 Fig. 2 is a schematic structural view of the mold locking device of the side mold frame of the bottle blowing machine according to the second embodiment of the present application (unlocked state);

[0030] Fig. 1 is a schematic structural view of the mold locking device of the side mold frame of the bottle blowing machine according to the first embodiment of the present application (unlocked state); Figure 10 Fig. 2 is a schematic structural view of the mold locking device of the side mold frame of the bottle blowing machine according to the second embodiment of the present application (unlocked state); Figure 9 Fig. 1 is a schematic structural view of the mold locking device of the side mold frame of the bottle blowing machine according to the first embodiment of the present application (unlocked state).

[0031] 1, first shaft; 2, first side mold; 3, second side mold; 31, open end; 311, first protrusion; 312, first recess; 4, fixed buckle; 41, fixed buckle bearing surface; 5, movable buckle; 51, movable buckle hook portion; 511, movable buckle bearing surface; 52, movable connection end; 521, second recess; 522, second protrusion; 53, connection shaft; 54, roller; 6, eccentric shaft; 61, main shaft body; 62, eccentric shaft body; 7, driving swing arm; 8, swing rod; 9, guide block. DETAILED DESCRIPTION

[0032] The technical solutions of the present application will be further described below in combination with specific embodiments and drawings.

[0033] In the following, only certain exemplary embodiments are described. As will be realized by those skilled in the art, the described embodiments can be modified in various different ways without departing from the spirit or scope of the inventive embodiments. The drawings and description are, therefore, to be considered exemplary only and not restrictive.

[0034] In the description of the embodiments of the present application, it needs to be understood that the terms "length", "inner", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the embodiments of the present application.

[0035] In addition, the terms "first", "second", etc. are used herein only to describe different instances, and do not imply or suggest relative importance or a number of the technical features indicated. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0036] In the embodiments of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected, or can be communicated; can be directly connected, or can be indirectly connected through an intermediate medium; can be the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0037] In the embodiments of the present application, unless otherwise explicitly specified and limited, "on" or "under" of the first feature to the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "above" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. "Below", "below" and "below" of the first feature to the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0038] The following disclosure provides many different embodiments or examples for implementing different structures of the embodiments of the present application. In order to simplify the disclosure of the embodiments of the present application, the components and arrangements of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the embodiments of the present application. In addition, the reference numerals and / or reference letters can be repeated in different examples of the embodiments of the present application, and such repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and / or arrangements discussed.

[0039] Embodiment one:

[0040] Referring to Figures 1-4 and Figures 9-10As shown, the present embodiment provides a mold locking device for a side mold frame of a bottle blowing machine. The plastic container forming mold group of the bottle blowing machine comprises a first shaft 1, a first side mold 2 and a second side mold 3 which are rotatably opened and closed to support the side molds of the plastic container, and at least one of the first side mold 2 and the second side mold 3 is rotatable about the first shaft 1. In the present embodiment, both the first side mold 2 and the second side mold 3 are rotatable about the first shaft 1.

[0041] The mold locking device comprises a fixed buckle 4 fixedly arranged on the first side mold 2, a movable buckle 5 arranged on the second side mold 3, and a movable buckle driving mechanism. The fixed buckle 4 and the movable buckle 5 are used to be buckled with each other at a mold closing position, and at this time, the movable buckle 5 is buckled outside the fixed buckle 4. The movable buckle driving mechanism comprises an eccentric shaft 6 and a swing rod 8, which are used to drive the movable buckle 5 and the fixed buckle 4 to be buckled / unbuckled with each other. The swing rod 8 is rotatably connected with the second side mold 3 and the movable buckle 5 at both ends thereof.

[0042] The eccentric shaft 6 of the movable buckle driving mechanism is parallel to the first shaft 1 and movably arranged on the second side mold 3, and is rotatable relative to the second side mold 3. When the eccentric shaft 6 is rotated in a forward direction, the movable buckle 5 is driven by the swing rod 8 to make a planar movement of both translation and swing, and is buckled and pulled tightly with the fixed buckle 4, thereby preventing the relative movement between the first side mold 2 and the second side mold 3, and realizing the locking. When the eccentric shaft 6 is rotated in a reverse direction, the movable buckle 5 is driven by the swing rod 8 to make a planar movement of both translation and swing, and is released and separated from the fixed buckle 4, thereby allowing the relative movement between the first side mold 2 and the second side mold 3, and realizing the unlocking.

[0043] Referring to Figures 1-4 and Figures 9-10 As shown, the eccentric shaft 6 comprises a plurality of shaft segments with different diameters which are distributed at intervals. The shaft segments with one diameter share a common axis of a main shaft body 61 and form a rotation pair with the second side mold 3, and the shaft segments with another diameter share a common axis of an eccentric shaft body 62 and form a rotation pair with the movable buckle 5. The axes of the main shaft body 61 and the eccentric shaft body 62 are parallel but offset by a distance.

[0044] Referring to Figures 3-4 As shown, the fixed buckle 4 can be buckled with the movable buckle hook portion 51 of the left end portion of the movable buckle 5 through the "L"-shaped fixed buckle hook portion of the right end portion of the fixed buckle 4. The fixed buckle bearing surface 41 of the fixed buckle hook portion and the movable buckle bearing surface 511 of the movable buckle hook portion 51 are in close contact with each other in the locked state.

[0045] The left end portion of the movable buckle 5 is the "L"-shaped movable buckle hook portion 51, the middle portion of the movable buckle 5 is rotatably connected with the eccentric shaft body 62 of the eccentric shaft 6, and the right end portion of the movable buckle 5 is arranged with a connecting shaft 53 for connecting one end of the swing rod 8.

[0046] The movable buckle driving mechanism composed of the movable buckle 5, the eccentric shaft 6, the swing lever 8 and the second side mold 3 is a planar four-bar linkage, the movable buckle 5 is a link of the planar four-bar linkage, and the movable buckle 5 performs planar motion. When the eccentric shaft 6 rotates in the positive direction relative to the second side mold 3, the movable buckle 5 will be locked and pulled tight with the fixed buckle 4, and the zero-gap locking of the side mold of the plastic container is realized.

[0047] Referring to Figures 1-2 As shown, the lower end of the main shaft body 61 extends downwardly from the second side mold 3, and the lower end is provided with a driving swing arm 7. A roller 54 on the driving swing arm 7 is in contact with a high pair of the opening and closing locking cam (not shown in the figure), and is used to drive the eccentric shaft 6 to rotate in the positive direction or the reverse direction.

[0048] Referring to Figure 1 As shown, the opening end 31 of the second side mold 3 has a plurality of first convex portions 311 and first concave portions 312 arranged in sequence from top to bottom, and the movable connection end 52 of the movable buckle 5 has a plurality of second concave portions 521 and second convex portions 522 arranged in sequence from top to bottom. The first convex portion 311 can be fitted and clamped into the corresponding second concave portion 521, and the second convex portion 522 can be fitted and clamped into the corresponding first concave portion 312.

[0049] In the embodiment, a first through hole for being penetrated by the main shaft body 61 along the axial direction is formed on the first convex portion 311, and a second through hole for being penetrated by the eccentric shaft body 62 along the axial direction is formed on the second convex portion 522. Referring to Figures 9-10 As shown, a plurality of main shaft bodies 61 and a plurality of eccentric shaft bodies 62 are connected in sequence and alternately. Through this arrangement, the power performance, the carrying capacity and the running stability of the mechanism can be improved.

[0050] In the embodiment, the rotation axis lines of the two ends of the swing lever 8 are parallel to each other and parallel to the axis line of the eccentric shaft body 62.

[0051] Embodiment two:

[0052] Referring to Figures 5-8 and Figures 9-10 As shown, the embodiment provides a mold locking device of a bottle blowing machine side mold frame. The plastic container forming mold group of the bottle blowing machine comprises a first shaft 1, a first side mold 2 and a second side mold 3 which are rotatably opened and closed for supporting the side mold of the plastic container, and at least one of the first side mold 2 and the second side mold 3 can rotate around the first shaft 1. In the embodiment, both the first side mold 2 and the second side mold 3 can rotate around the first shaft 1.

[0053] The above-mentioned mold locking device comprises a fixed buckle 4 fixedly installed on the first side mold 2, a movable buckle 5 and a movable buckle driving mechanism installed on the second side mold 3. The fixed buckle 4 and the movable buckle 5 are used to lock each other in the mold closing position, and at this time the movable buckle 5 is locked outside the fixed buckle 4. The movable buckle driving mechanism comprises an eccentric shaft 6 and a guide block 9, which are used to drive the movable buckle 5 to lock / unlock with the fixed buckle 4. The guide block 9 is fixedly connected with the second side mold 3 and is connected with the movable buckle 5 in a high pair.

[0054] The eccentric shaft 6 of the movable buckle driving mechanism is parallel to the first shaft 1 and is movably installed on the second side mold 3 and can rotate relative to the second side mold 3. When the eccentric shaft 6 rotates forward, the movable buckle 5 is driven by the guide block 9 to make a plane movement of both displacement and swing, and is locked and tightened with the fixed buckle 4, thereby preventing the relative movement of the first side mold 2 and the second side mold 3, realizing the locking; when the eccentric shaft 6 rotates reversely, the movable buckle 5 is driven by the guide block 9 to make a plane movement of both displacement and swing, and is loosened and separated from the fixed buckle 4, thereby allowing the relative movement of the first side mold 2 and the second side mold 3, realizing the unlocking.

[0055] Referring to FIGS. 1 and 2, Figures 5-8 and Figures 9-10 As shown, the eccentric shaft 6 comprises a plurality of shaft segments with different diameters and are distributed at intervals. The shaft segments with one diameter share the main shaft body 61 and form a rotating pair with the second side mold 3, and the shaft segments with another diameter share the eccentric shaft body 62 and form a rotating pair with the movable buckle 5. The axis of the main shaft body 61 is parallel to the axis of the eccentric shaft body 62 but is offset by a distance.

[0056] Referring to FIGS. 1 and 2, Figures 5-8 As shown, the fixed buckle 4 is hooked with the movable buckle 5 through the "L"-shaped fixed buckle hook part at the right end of the fixed buckle 4 and the "L"-shaped movable buckle hook part 51 at the left end of the movable buckle 5. The fixed buckle bearing surface 41 of the fixed buckle hook part and the movable buckle bearing surface 511 of the movable buckle hook part 51 are in close contact with each other in the locking state.

[0057] The left end of the movable buckle 5 is the "L"-shaped movable buckle hook part 51, the middle part of the movable buckle 5 is connected with the rotating pair of the eccentric shaft body 62 of the eccentric shaft 6, and the right end of the movable buckle 5 is provided with a connecting shaft 53, and a roller 54 is movably installed on the connecting shaft 53.

[0058] The movable buckle driving mechanism composed of the movable buckle 5, the eccentric shaft 6, the guide block 9 and the second side mold 3 is a plane high pair mechanism, the movable buckle 5 is a plane movement driven part in the plane high pair mechanism and makes a plane movement. When the eccentric shaft 6 rotates forward relative to the second side mold 3, the movable buckle 5 will be locked and tightened with the fixed buckle 4 by swinging and moving, thereby realizing the zero-gap locking of the side mold of the plastic container.

[0059] Referring to FIGS. 1 and 2, Figures 5-6As shown, the lower end of the main shaft body 61 extends downwardly beyond the second side mold 3, and the lower end is provided with a driving swing arm 7. A roller 54 on the driving swing arm 7 is in contact with a high pair of an opening and closing lock cam (not shown in the figure) to drive the eccentric shaft 6 to rotate in a forward direction or a reverse direction.

[0060] Referring to Figure 5 As shown, the open end 31 of the second side mold 3 has a plurality of first protrusions 311 and first recesses 312 arranged in sequence from top to bottom. The movable connecting end 52 of the movable buckle 5 has a plurality of second recesses 521 and second protrusions 522 arranged in sequence from top to bottom. The first protrusion 311 can be fitted and clamped into the corresponding second recess 521, and the second protrusion 522 can be fitted and clamped into the corresponding first recess 312.

[0061] In the embodiment, the first protrusion 311 is provided with a first through hole for being penetrated by the main shaft body 61 along the axial direction thereof, and the second protrusion 522 is provided with a second through hole for being penetrated by the eccentric shaft body 62 along the axial direction thereof. Figures 9-10 As shown, a plurality of main shaft bodies 61 and a plurality of eccentric shaft bodies 62 are connected in sequence and alternately. Through such arrangement, the power performance, load capacity and running stability of the mechanism can be improved.

[0062] In the embodiment, the rotation axis of the roller 54 is parallel to the axis of the eccentric shaft body 62.

[0063] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. A mold locking device for a side mold carrier of a bottle blowing machine, the plastic container forming mold block of the bottle blowing machine comprising a first axis, a first side mold and a second side mold which are openably and closably rotatable relative to each other for supporting a side mold of a plastic container, at least one of the first side mold and the second side mold being rotatable about the first axis, characterized in that: The mold locking device comprises a fixed buckle fixedly arranged on the first side mold, a movable buckle arranged on the second side mold, and a movable buckle driving mechanism; the fixed buckle and the movable buckle are used for locking each other at a mold closing position, and the movable buckle is locked outside the fixed buckle; the movable buckle driving mechanism comprises an eccentric shaft and a swing rod / guide block, and is used for driving the movable buckle and the fixed buckle to lock / unlock each other; The eccentric shaft is parallel to the first shaft and movably arranged on the second side mold and can rotate relative to the second side mold; when the eccentric shaft rotates in one direction, the swing rod or the guide block drives the movable buckle and the fixed buckle to lock and tighten, prevents the relative movement of the first side mold and the second side mold, and realizes locking; when the eccentric shaft rotates in the other direction, the swing rod or the guide block drives the movable buckle and the fixed buckle to release and separate, allows the relative movement of the first side mold and the second side mold, and realizes unlocking.

2. The mold locking apparatus of a bottle blowing machine side mold carrier according to claim 1, characterized by: The fixed buckle and the movable buckle respectively have "L"-shaped hook portions, and the bearing surfaces of the two groups of hook portions are attached to each other in the locking state.

3. The mold locking apparatus of a bottle blowing machine side mold frame according to claim 1, characterized in that: The eccentric shaft comprises a plurality of shaft segments with different diameters and arranged at intervals, the shaft segments with one diameter are coaxial with a main shaft body and form a rotating pair with the second side mold, the shaft segments with the other diameter are coaxial with an eccentric shaft body and form a rotating pair with the movable buckle, and the axes of the main shaft body and the eccentric shaft body are parallel but offset by a distance.

4. The mold locking apparatus of a bottle blowing machine side mold carrier according to claim 3, characterized in that: One end of the movable buckle is provided with an "L"-shaped hook portion, the middle is provided with a shaft hole matched with the eccentric shaft body, and the other end is provided with a shaft matched with the swing rod or a roller in high pair contact with the guide block.

5. The means for locking the mold of a bottle blowing machine side mold carrier according to claim 1, characterized in that: The swing rod is rotatably connected to the second side mold and the movable buckle.

6. The means for locking the mold of a bottle blowing machine side mold carrier according to claim 1, characterized by: The guide block is fixedly connected to the second side mold and connected to the movable buckle in high pair.

7. The mold locking apparatus of a bottle blowing machine side mold frame according to claim 1, characterized by: The movable buckle driving mechanism composed of the movable buckle, the eccentric shaft, the swing rod, and the second side mold is a planar four-bar mechanism, the movable buckle is a connecting rod of the planar four-bar mechanism and performs planar motion; when the eccentric shaft rotates relative to the second side mold in one direction, the movable buckle is locked and tightened with the fixed buckle by swinging and moving, so that zero-gap locking of the side mold of the plastic container is realized.

8. The means for locking the mold of a bottle blowing machine side mold carrier according to claim 1, characterized in that: The movable buckle driving mechanism composed of the movable buckle, the eccentric shaft, the guide block, and the second side mold is a planar high pair mechanism, the movable buckle performs planar motion by swinging and moving when the mechanism moves; when the eccentric shaft rotates relative to the second side mold in one direction, the movable buckle is locked and tightened with the fixed buckle by swinging and moving, so that zero-gap locking of the side mold of the plastic container is realized.

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