Single-drop four-up film gripper for a matrix bottle machine

Abstract

A single-drop, four-opening film clamp for a row-type bottle-making machine includes a first clamp and a second clamp that rotate around a pivot axis. The first clamp is connected to a third clamp via a first pivot axis that engages with a first connecting hole. The second clamp is connected to a fourth clamp via a second pivot axis that engages with a second connecting hole. The first clamp has a first clamping block, the second clamp has a second clamping block, the third clamp has a third clamping block, and the fourth clamp has a fourth clamping block on one side. The first, second, third, and fourth clamps are independently connected and surround each other to form the mold cavity of the bottle-making machine mold. This utility model forms a single-drop, four-opening film clamp structure for glass bottles by the first, second, third, and fourth clamps being independently connected and surround each other to form the mold cavity of the bottle-making machine mold.

Description

Technical Field

[0001] This utility model relates to the field of mold making, and in particular to the field of single-drop four-film opening clamping technology for a row-type bottle making machine. Background Technology

[0002] Currently, most of the row-type bottle-making machines on the market that manufacture glass bottles use double mold-opening clamps, as shown in the attached image. Figure 2 The clamping mechanism shown primarily uses a cylinder or hydraulic cylinder 50 to pull a connecting rod 51, achieving the opening and closing of the mold. However, this double-clamping structure cannot adapt to complex bottle structures, especially cosmetic bottles. To accommodate irregularly shaped bottles, the clamp must drive the mold to perform an arc-shaped separation motion along the bottle's contour. Traditional structures, lacking multi-axis linkage design, cannot achieve multi-piece demolding. The linear opening and closing trajectory of the double-clamping clamp conflicts with the curved surface of irregularly shaped bottles; the point clamping method of the double-clamping clamp cannot distribute stress, resulting in a low yield rate for high-precision bottle openings. Therefore, a clamping structure with multiple opening angles is urgently needed. Utility Model Content

[0003] This invention provides a single-drop four-opening film clamp for a row-type bottle making machine, which has the advantages of improving the forming accuracy of irregular bottle bodies, reducing demolding interference, and reducing stress concentration at the bottle mouth.

[0004] This application provides a single-drop four-opening film clamp for a row-type bottle making machine, including a first clamp and a second clamp that rotate around a pivot axis. The first clamp is connected to a third clamp via a first pivot axis that engages with a first connecting hole. The second clamp is connected to a fourth clamp via a second pivot axis that engages with a second connecting hole. The first clamp has a first bushing on one side and a first clamp block on the other side. The second clamp has a second bushing on one side and a second clamp block on the other side. The third clamp has a third clamp block on one side and a first driving device on the other side that drives the third clamp to rotate around the first pivot axis. The first driving device synchronously drives the first clamp to rotate. The fourth clamp has a fourth clamp block on one side and a second driving device on the other side that drives the fourth clamp to rotate around the second pivot axis. The second driving device synchronously drives the second clamp to rotate. The first clamp, second clamp, third clamp, and fourth clamp are independently connected and surround each other to form the mold cavity of the bottle making machine mold.

[0005] Furthermore, this application also proposes that the first driving device includes a first driving arm, one end of which is connected to a first fixed rotating shaft through a third mounting hole, and the other end of which is connected to a first movable rotating shaft through a fifth mounting hole. The first movable rotating shaft is connected to one end of a first movable connecting rod, and the other end of the first movable connecting rod is connected to the seventh mounting hole of a third clamp through a second movable rotating shaft.

[0006] Furthermore, this application also proposes that the second drive device includes a second drive arm, one end of which is connected to a second fixed rotating shaft through a fourth mounting hole, and the other end of which is connected to a third movable rotating shaft through a sixth mounting hole. The third movable rotating shaft is connected to one end of a second movable connecting rod, and the other end of the second movable connecting rod is connected to the eighth mounting hole of the fourth clamp through the fourth movable rotating shaft.

[0007] Furthermore, this application also proposes that a first bushing and a third bushing are provided on one side of the first clamp in the axial direction, with a first gap between the first bushing and the third bushing; a second bushing and a fourth bushing are provided on one side of the second clamp in the axial direction, with a second gap between the second bushing and the fourth bushing; the first gap is embedded in the fourth bushing, and the second gap is embedded in the third bushing; the first bushing, the third bushing, the second bushing, and the fourth bushing are sleeved on the rotating shaft.

[0008] Furthermore, this application also proposes that the outer periphery of the first connecting hole is provided with a first hook and a second hook respectively arranged vertically, the first hook and the second hook are integrally formed with the first clamp, a third gap is provided between the first hook and the second hook, the third clamp is embedded in the third gap, the third clamp is provided with a first mounting hole, and the first mounting hole and the first connecting hole are connected to the first rotating shaft.

[0009] Furthermore, this application also proposes that the outer periphery of the second connecting hole is provided with a third and a fourth hook, which are respectively arranged vertically. The third and fourth hooks are integrally formed with the second clamp. A fourth gap is provided between the third and fourth hooks. The fourth clamp is embedded in the fourth gap. The fourth clamp is provided with a second mounting hole. The second mounting hole and the second connecting hole are connected to the second rotating shaft.

[0010] Furthermore, this application also proposes that a first gap groove is provided on the side of the third mounting hole, the first gap groove is vertically connected to the first gap adjustment hole, and the screw that cooperates with the first gap adjustment hole adjusts the gap size of the first gap groove.

[0011] Furthermore, this application also proposes that a second gap groove is provided on the side of the fourth mounting hole, the second gap groove is vertically connected to the second gap adjustment hole, and the screw that cooperates with the second gap adjustment hole adjusts the gap size of the second gap adjustment hole.

[0012] As can be seen from the above, the single-drop four-opening film clamp for the row-type bottle making machine provided in this application realizes the multi-directional arc-shaped separation motion of the mold cavity through the linkage design of four independent clamps. The bushing clearance fit and the hanging ear structure ensure the precise positioning of each clamp. Combined with the adjustable clearance drive device, it realizes the interference-free demolding of irregular bottle bodies. It has the advantages of improving molding accuracy, reducing stress concentration at the bottle mouth and adapting to the production of complex bottle shapes. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings:

[0014] Figure 1 This is a schematic diagram of a single-drop four-opening film clamp structure for a row-type bottle making machine according to this utility model;

[0015] Figure 2 A schematic diagram of a single-drop, two-opening film clamp structure for a row-type bottle making machine in the prior art;

[0016] Figure 3 This is a schematic diagram of the connection structure between the first clamp and the second clamp in this utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the first clamp in this utility model;

[0018] Figure 5 This is a schematic diagram of the structure of the second clamp in this utility model;

[0019] Figure 6 This is a schematic diagram of the connection structure between the third clamp and the fourth clamp in this utility model. Detailed Implementation

[0020] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The components of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of this application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following drawings indicate similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0021] In existing technologies, row-type bottle-making machines for manufacturing glass bottles generally adopt a double-mold clamping structure, using cylinders or hydraulic cylinders to drive linear motion to achieve mold opening and closing. This type of structure has significant drawbacks when dealing with irregularly shaped bottles: the linear opening and closing trajectory interferes with the curved bottle contour, leading to difficulties in demolding; the single-point clamping method causes stress concentration in a local area, affecting the forming accuracy of the bottle neck; and the insufficient freedom of mold movement prevents the realization of multi-piece separation, thus restricting the production needs of complex bottle shapes.

[0022] To address the aforementioned issues, the inventors discovered a geometric conflict between the motion trajectory of the traditional double-mold structure and the curved surface of the irregularly shaped bottle, necessitating the construction of a multi-axis linkage system to achieve the arc-shaped separation action. By analyzing the mechanical distribution during the mold opening and closing process, they proposed using four sets of independent clamping clamps to form a distributed grip, dispersing localized stress. Further research into the synchronous motion mechanism of multiple mold pieces was conducted, designing a drive device to control the rotation of each set of clamping clamps around an independent axis, causing the mold cavity to separate along the curved surface trajectory.

[0023] Therefore, this application proposes a single-drop four-opening film clamp for a row-type bottle making machine, including a first clamp 9 and a second clamp 10 that rotate around a rotating axis. The first clamp 9 is connected to a third clamp 5 through a first rotating axis that engages with a first connecting hole 12. The second clamp 10 is connected to a fourth clamp 6 through a second rotating axis that engages with a second connecting hole 13. The first clamp 9 has a first bushing 8 on one side and a first clamp block 3 on the other side. The second clamp 10 has a second bushing 7 on one side and a second clamp block 4 on the other side. The third clamp 5 has a third clamp block 1 on one side and a first driving device on the other side that drives the third clamp 5 to rotate around the first rotating axis. The first driving device synchronously drives the first clamp 9 to rotate. The fourth clamp 6 has a fourth clamp block 2 on one side and a second driving device on the other side that drives the fourth clamp 6 to rotate around the second rotating axis. The second driving device synchronously drives the second clamp 10 to rotate. The first clamp 9, the second clamp 10, the third clamp 5, and the fourth clamp 6 are independently connected around each other to form the mold cavity of the bottle making machine mold.

[0024] The connection structure between the first and third clamps refers to a hinged connection formed through a first connecting hole and a rotating shaft. Specifically, this can be achieved by integrally molding a lug with mounting holes to the clamp body, allowing for rotational freedom. The synchronous drive of the first drive device means that power is simultaneously transmitted to both the first and third clamps via a linkage mechanism, ensuring coordinated movement trajectories. The bushing and clearance fit structure refers to the staggered arrangement of the first and fourth bushings through embedded clearances. Specifically, this can be achieved using axially spaced bushing sets to avoid motion interference. The mold cavity is constructed by the four clamping blocks' ends collectively enclosing a closed space. Specifically, the opening and closing path of the cavity can be controlled by adjusting the rotation angle of each clamp.

[0025] Specifically, the four clamps are connected by a pivot to form a spatial four-bar linkage. When the first drive unit pushes the third clamp to rotate around the first pivot, it causes the first clamp to rotate synchronously; when the second drive unit pushes the fourth clamp to rotate around the second pivot, it causes the second clamp to rotate synchronously. The rotational motion of the four clamps causes each clamp block to move along a preset trajectory, and the cavity can separate in multiple directions. The cross-nesting design of the bushings and clearances ensures that adjacent clamps maintain spacing during rotation, avoiding mechanical interference. The mating structure of the lugs and mounting holes provides a stable rotational fulcrum, ensuring motion accuracy.

[0026] Compared to existing technologies, traditional double-clamp clamps can only achieve linear opening and closing, while this solution uses four sets of independently rotating clamps to create multi-angle separation movements, allowing the mold cavity to unfold along a curved trajectory to adapt to irregular bottle contours. The distributed drive system makes the movement of each clamp independently controllable, achieving coordinated demolding of multiple mold pieces. The staggered arrangement of bushings increases the degrees of freedom of movement within a limited space, avoiding spatial conflicts inherent in traditional parallel shaft systems.

[0027] Through the above technical solutions, this application solves the problem of mismatched demolding trajectories for irregularly shaped bottles, enabling the mold to separate along the curved surface path; it disperses the concentrated stress of traditional single-point clamping, improving the bottle mouth forming qualification rate; and it achieves precise control of multiple mold pieces through the independent movement of four sets of clamps, expanding the processing capability of the row-type bottle making machine for complex bottle shapes.

[0028] As a preferred structural feature, the first drive device includes a first drive arm 15. One end of the first drive arm 15 is connected to a first fixed rotating shaft through a third mounting hole 40, and the other end is connected to a first movable rotating shaft through a fifth mounting hole 19. The first movable rotating shaft is connected to one end of a first movable connecting rod 17, and the other end of the first movable connecting rod 17 is connected to the seventh mounting hole 11 of a third clamp 5 through a second movable rotating shaft.

[0029] The first drive arm is a rigid component that transmits driving force, which can be made of alloy steel forgings. Mounting holes at both ends are used to construct a rotary pair. The third mounting hole is a positioning structure that mates with the fixed shaft, which can be implemented using an interference fit bushing structure to ensure stable rotation of the drive arm around the fixed axis. The fifth mounting hole is a connecting structure that mates with the movable shaft, which can be implemented using a clearance fit sliding bearing to allow displacement of the movable shaft at the end of the drive arm. The first movable link is a transmission component that connects the drive arm and the clamp, which can be implemented using a hinged linkage mechanism to convert the swing motion of the drive arm into the rotational motion of the clamp.

[0030] Specifically, when the external power source can use a cylinder or hydraulic cylinder (as in existing technology) to drive the first drive arm to swing around the first fixed rotating shaft, the fifth mounting hole causes the first movable rotating shaft to generate a displacement trajectory. This displacement is transmitted through the first movable connecting rod to the second movable rotating shaft at the seventh mounting hole, forcing the third clamp to rotate around the first rotating shaft. Since the third clamp and the first clamp are linked through the first connecting hole, the rotation of the third clamp synchronously drives the first clamp to rotate around the rotating shaft, thereby realizing the opening and closing action of the mold cavity.

[0031] Compared to existing technologies, traditional double-clamp clamps use a linear push rod drive, resulting in a single movement trajectory and an inability to achieve multi-axis linkage. This solution, through a composite transmission structure of the drive arm and movable linkage, constructs a motion transmission chain with two rotational degrees of freedom, enabling the third clamp to move along a preset arc trajectory. This multi-axis linkage design matches the mold opening and closing path with the curved surface of the irregularly shaped bottle, solving the demolding interference problem caused by linear motion.

[0032] Through the above technical solution, this application achieves arc-shaped separation motion during the mold opening and closing process, enabling the clamping assembly to adapt to the curved contours of irregularly shaped products such as cosmetic bottles. The hinged structure of the movable connecting rod effectively disperses stress concentration during the mold opening process, improving the molding pass rate of thin-walled bottle mouths. The rigid connection design between the drive arm and the fixed rotating shaft enhances the stability of the transmission system, ensuring the synchronous accuracy of multiple mold pieces in complex movements.

[0033] As a preferred structural feature, the second drive device includes a second drive arm 16. One end of the second drive arm 16 is connected to a second fixed rotating shaft through a fourth mounting hole 33, and the other end is connected to a third movable rotating shaft through a sixth mounting hole 20. The third movable rotating shaft is connected to one end of a second movable connecting rod 18, and the other end of the second movable connecting rod 18 is connected to the eighth mounting hole 14 of the fourth clamp 6 through the fourth movable rotating shaft.

[0034] The second drive arm is a rigid arm-shaped structure used to transmit driving force. It can be manufactured using metal casting or forging processes, and its two ends connect to a fixed rotating shaft and a movable rotating shaft respectively, forming a lever-type power transmission path. The fourth mounting hole is a hole structure used to fix the second drive arm, which can be implemented using bolts or pins to ensure a stable connection between the second drive arm and the fixed rotating shaft. The sixth mounting hole is a hole structure used to connect the third movable rotating shaft, which can be implemented using sliding bearings or rolling bearings, allowing the third movable rotating shaft to rotate within the hole. The third movable rotating shaft is a rotating shaft connecting the second drive arm and the second movable connecting rod, which can be implemented using a stepped shaft or a keyway shaft structure, used to convert rotational motion into linear motion of the connecting rod. The second movable connecting rod is a rod-shaped structure connecting the third movable rotating shaft and the fourth clamp, which can be implemented using a hinge connection or a ball joint connection, driving the fourth clamp to rotate around the second rotating shaft through the reciprocating motion of the connecting rod. The eighth mounting hole is a connecting hole on the fourth clamp, which can be implemented using a through hole or blind hole structure, used to fix the fourth movable rotating shaft and transmit driving force.

[0035] Specifically, one end of the second drive arm is fixed to the second fixed rotating shaft through the fourth mounting hole, and the other end is connected to the third movable rotating shaft through the sixth mounting hole. The third movable rotating shaft is hinged to one end of the second movable connecting rod, and the other end of the second movable connecting rod is embedded in the eighth mounting hole of the fourth clamp through the fourth movable rotating shaft. When an external drive source acts on the second drive arm, the second drive arm rotates around the second fixed rotating shaft, driving the third movable rotating shaft to move along the motion trajectory of the sixth mounting hole. The displacement of the third movable rotating shaft is converted into the rotational motion of the fourth clamp around the second rotating shaft through the second movable connecting rod, thereby driving the second clamp to rotate synchronously. This structure, through multi-axis linkage design, makes the motion trajectories of the fourth clamp and the second clamp form an arc-shaped opening and closing path, avoiding stress concentration on the bottle surface caused by linear motion.

[0036] Compared to existing technologies, traditional double-mold clamps use cylinders to directly drive the clamps in a linear motion, which causes interference between the opening and closing trajectory and the curved surface of irregularly shaped bottles, resulting in difficulties in demolding. This solution, however, uses the cooperation of the second drive arm and the second movable linkage to convert the linear driving force into an arc-shaped motion, enabling the fourth clamp to separate at multiple angles along the bottle's contour, adapting to complex bottle structures.

[0037] Through the above technical solution, this application solves the problems of traditional double-mold clamps being unable to achieve multi-piece demolding and having a low bottle neck yield rate. The second driving device drives the fourth clamp to move along an arc trajectory through a multi-axis linkage structure, enabling the mold cavity to fit the surface of the irregularly shaped bottle for opening and closing, avoiding demolding interference. At the same time, the driving force transmitted by the connecting rod is distributed to the fourth clamp through multi-point contact, reducing local stress concentration and improving the bottle neck forming accuracy.

[0038] As a preferred structural feature, the first clamp 9 has a first bushing 8 and a third bushing 27 spaced apart on one side in the axial direction, with a first gap 26 between the first bushing 8 and the third bushing 27; the second clamp 10 has a second bushing 7 and a fourth bushing 24 spaced apart on one side in the axial direction, with a second gap 23 between the second bushing 7 and the fourth bushing 24. The first gap 26 is embedded in the fourth bushing 24, and the second gap 23 is embedded in the third bushing 27. The first bushing 8, the third bushing 27, the second bushing 7, and the fourth bushing 24 are fitted onto the rotating shaft.

[0039] The first and third bushings refer to two annular support components arranged parallel to each other along the axial direction. They can be implemented using a split metal sleeve structure, with spacing to create accommodating spaces for the insertion of bushings from other clamps. The second and fourth bushings are another set of bushings that form a complementary nesting relationship with the first bushing set. They can also be split sleeve structures of the same material, with their spacing matching the width of the first gap to achieve staggered nesting. The first and second gaps refer to the axial gap areas between the two sets of bushings. These can be created by adjusting the bushing spacing to form a groove-like structure of a specific width to accommodate the insertion of bushings from another set of clamps, thus achieving a compact layout of multiple bushings within a limited space. The bushing-to-shaft connection refers to the function of enabling the clamp to rotate around the shaft through the fit between the bushing's inner hole and the shaft. This can be achieved using a clearance fit or a sliding bearing structure to ensure rotational freedom.

[0040] Specifically, a first bushing and a third bushing are respectively installed on both sides of the first clamp along its axial direction, with a first gap of a specific width between them. A second gap is formed between the corresponding second and fourth bushings of the second clamp. When the two sets of clamps are assembled, the fourth bushing is embedded in the first gap, and the third bushing is embedded in the second gap, forming a staggered nesting layout of the bushings. This structure allows the bushings of each clamp to avoid mutual interference in the axial space, while achieving synchronous rotation through a rotating shaft that runs through all the bushings. During opening and closing, when each clamp rotates independently around its own shaft, the gap design between the bushings eliminates motion trajectory conflicts, ensuring precise alignment of the mold cavity.

[0041] Compared to existing technologies, traditional double-mold clamps typically use a single-sleeve structure for their bushings, leading to spatial interference risks when adjacent clamps move. This solution, however, uses spaced bushings to form a complementary nested gap structure, enabling multiple bushings to work collaboratively within the same axial space. This ensures rotational freedom while optimizing space utilization. Existing technologies with fixed bushing spacing cannot accommodate rotating shaft systems of different sizes. This solution, through an adjustable gap width design, can be compatible with rotating shaft assemblies of different specifications.

[0042] Through the above technical solution, this application effectively solves the problem of bushing layout in a limited space for a multi-clamp system. By employing a complementary nesting design of bushing gaps, motion interference is avoided while improving structural compactness. This solution enables the four-opening mold clamp to maintain stable rotation during complex opening and closing movements, reducing mold alignment deviations and thus improving the forming accuracy of irregularly shaped glass bottles, particularly significantly improving the dimensional compliance rate of the bottle neck area. Furthermore, the spaced arrangement of the bushings disperses stress concentration during rotation, extending the service life of the rotating shaft system.

[0043] As a preferred structural feature, the outer periphery of the first connecting hole 12 is provided with a first hanging ear 31 and a second hanging ear 30 respectively, which are arranged vertically. The first hanging ear 31 and the second hanging ear 30 are integrally formed with the first clamp 9. A third gap 29 is provided between the first hanging ear 31 and the second hanging ear 30. The third clamp 5 is embedded in the third gap 29. The third clamp 5 is provided with a first mounting hole 37. The first mounting hole 37 and the first connecting hole 12 are connected to the first rotating shaft.

[0044] The first and second lugs refer to the two protruding structures located on the outer periphery of the first connecting hole. These can be integrally cast or welded to the first clamp body, forming a clamping space and restricting the displacement direction of the third clamp. The third gap refers to the gap between the first and second lugs, which can be adjusted by changing the lug spacing. This gap accommodates a portion of the third clamp's structure and allows it to rotate around its axis. The first mounting hole is a through hole on the third clamp, formed by drilling. It mates coaxially with the first connecting hole and allows the rotating shaft to pass through, ensuring synchronous rotation between the third and first clamps.

[0045] Specifically, the end of the third clamp is embedded in a third gap between the first and second lugs, and its first mounting hole aligns with the first connecting hole to pass through the first rotating shaft. When the first drive device drives the third clamp to rotate around the first rotating shaft, the first clamp and the third clamp form a rigid connection through the first rotating shaft, thereby achieving synchronous rotational movement of the two. The width of the third gap is slightly larger than the thickness of the embedded part of the third clamp, so that the third clamp will not interfere with the lugs during rotation, while the lugs constrain the axial displacement of the third clamp.

[0046] Compared to existing technologies, traditional double-opening mold clamps connect the drive components via a single-point pivot, resulting in limited clamp movement trajectory and poor synchronization. This solution, through the matching design of the lugs and clearances, maintains synchronous clamp rotation while utilizing the axial constraint of the lugs on the third clamp, avoiding connection loosening issues caused by vibration or load changes.

[0047] Through the above technical solution, this application solves the stress concentration problem caused by the single-point connection of traditional double-mold clamps. The lateral load during the clamp movement is dispersed by the matching structure of the lugs and the gap, improving the stability of the mold opening and closing action. At the same time, the rigid connection design between the third clamp and the first clamp enhances the synchronization accuracy of multi-axis linkage, enabling the mold cavity to separate at multiple angles along the contour of the irregular bottle body, thereby improving the bottle mouth forming qualification rate.

[0048] As a preferred structural feature, the outer periphery of the second connecting hole 13 is provided with a third hook 32 and a fourth hook 25, respectively, arranged vertically. The third hook 32 and the fourth hook 25 are integrally formed with the second clamp 10. A fourth gap is provided between the third hook 32 and the fourth hook 25, and a fourth clamp 6 is embedded in the fourth gap. The fourth clamp 6 is provided with a second mounting hole 36, which, together with the second connecting hole 13, connects to the second rotating shaft. The third mounting hole 40 has a first gap groove 38 on its side, which is vertically connected to a first gap adjustment hole 39. The screw that engages with the first gap adjustment hole 39 adjusts the gap size of the first gap groove 38. The fourth mounting hole 33 has a second gap groove 35 on its side, which is vertically connected to a second gap adjustment hole 34. The screw that engages with the second gap adjustment hole 34 adjusts the gap size of the second gap adjustment hole 34.

[0049] The first clearance groove refers to a recessed structure located on the side of the third mounting hole, which can be formed by milling and is used to accommodate the clearance adjustment component. This structure dynamically adjusts the tightness of the fit between the mounting hole and the rotating shaft by changing the groove width. The first clearance adjustment hole is a threaded hole perpendicularly connected to the first clearance groove, which can be machined by drilling and is used to install the adjustment screw. Rotating the screw can push the groove wall to move, thereby controlling the width of the clearance groove. The screw is a rod-shaped component with external threads, which can be made of stainless steel, and its end contacts the side wall of the clearance groove. By screwing the screw in or out, the groove wall spacing can be changed, thereby adjusting the assembly clearance between the third mounting hole and the rotating shaft.

[0050] Specifically, during the assembly of the drive arm and the fixed shaft, when it is necessary to adjust the fit clearance between the mounting hole and the shaft, the screw inside the first clearance adjustment hole can be rotated. The end of the screw abuts against the side wall of the first clearance groove. When screwed in, it pushes the groove wall inward to shrink, reducing the width of the clearance groove and making the third mounting hole and the shaft fit tightly. When screwed out, the groove wall expands outward, increasing the width of the clearance groove and reducing the contact stress between the mounting hole and the shaft. This adjustment process can be performed while the equipment is running without disassembling the drive arm assembly.

[0051] Compared to existing technologies, traditional drive arm mounting holes use a fixed-size design. Over long-term use, wear increases the gap between the shaft and the mounting hole, affecting transmission accuracy. This solution, through an adjustable gap structure, can dynamically compensate for wear during the equipment's operating cycle. For example, in high-temperature operating environments, dimensional changes caused by thermal expansion of metal materials can be corrected in real time through gap adjustment, avoiding the accumulation of transmission errors.

[0052] Through the above technical solution, this application solves the problem of reduced transmission accuracy caused by the non-adjustable clearance between the drive arm mounting hole and the rotating shaft, realizes online compensation of assembly accuracy, ensures the synchronization of mold opening and closing actions, and improves the qualification rate of irregular bottle neck forming.

[0053] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, and alterations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A single-drop four-opening film clamp for a row-type bottle making machine, comprising a first clamp (9) and a second clamp (10) that rotate around a pivot axis, characterized in that: The first clamp (9) is connected to the third clamp (5) through the first rotating shaft that engages with the first connecting hole (12); the second clamp (10) is connected to the fourth clamp (6) through the second rotating shaft that engages with the second connecting hole (13); the first clamp (9) has a first bushing (8) on one side and a first clamp block (3) on the other side; the second clamp (10) has a second bushing (7) on one side and a second clamp block (4) on the other side; the third clamp (5) has a third clamp block (1) on one side and a first driving device that drives the third clamp (5) to rotate around the first rotating shaft on the other side, and the first driving device synchronously drives the first clamp (9) to rotate; the fourth clamp (6) has a fourth clamp block (2) on one side and a second driving device that drives the fourth clamp (6) to rotate around the second rotating shaft on the other side, and the second driving device synchronously drives the second clamp (10) to rotate; the first clamp (9), the second clamp (10), the third clamp (5), and the fourth clamp (6) are connected to each other independently to form the mold cavity of the bottle making machine mold.

2. The single-drop four-opening film clamp for a row-type bottle making machine according to claim 1, characterized in that: The first driving device includes a first driving arm (15), one end of which is connected to a first fixed rotating shaft through a third mounting hole (40), and the other end is connected to a first movable rotating shaft through a fifth mounting hole (19). The first movable rotating shaft is connected to one end of a first movable connecting rod (17), and the other end of the first movable connecting rod (17) is connected to the seventh mounting hole (11) of a third clamp (5) through a second movable rotating shaft.

3. The single-drop four-opening film clamp for a row-type bottle making machine according to claim 1, characterized in that: The second drive device includes a second drive arm (16), one end of which is connected to a second fixed shaft through a fourth mounting hole (33), and the other end is connected to a third movable shaft through a sixth mounting hole (20). The third movable shaft is connected to one end of a second movable link (18), and the other end of the second movable link (18) is connected to the eighth mounting hole (14) of the fourth clamp (6) through the fourth movable shaft.

4. The single-drop four-opening film clamp for a row-type bottle making machine according to claim 1, characterized in that: The first clamp (9) has a first bushing (8) and a third bushing (27) spaced apart on one side in the axial direction, and a first gap (26) is provided between the first bushing (8) and the third bushing (27); the second clamp (10) has a second bushing (7) and a fourth bushing (24) spaced apart on one side in the axial direction, and a second gap (23) is provided between the second bushing (7) and the fourth bushing (24). The first gap (26) is embedded in the fourth bushing (24), and the second gap (23) is embedded in the third bushing (27). The first bushing (8), the third bushing (27), the second bushing (7), and the fourth bushing (24) are sleeved on the rotating shaft.

5. The single-drop four-opening film clamp for a row-type bottle making machine according to claim 1, characterized in that: The outer periphery of the first connecting hole (12) is provided with a first hanging ear (31) and a second hanging ear (30) respectively arranged vertically. The first hanging ear (31) and the second hanging ear (30) are integrally formed with the first clamp (9). A third gap (29) is provided between the first hanging ear (31) and the second hanging ear (30). The third clamp (5) is embedded in the third gap (29). The third clamp (5) is provided with a first mounting hole (37). The first mounting hole (37) and the first connecting hole (12) are connected together to the first rotating shaft.

6. The single-drop four-opening film clamp for a row-type bottle making machine according to claim 1, characterized in that: The second connecting hole (13) is provided with a third hanging ear (32) and a fourth hanging ear (25) respectively arranged vertically on the outer periphery. The third hanging ear (32) and the fourth hanging ear (25) are integrally formed with the second clamp (10). A fourth gap is provided between the third hanging ear (32) and the fourth hanging ear (25). The fourth clamp (6) is embedded in the fourth gap. The fourth clamp (6) is provided with a second mounting hole (36). The second mounting hole (36) and the second connecting hole (13) are connected together to the second rotating shaft.

7. The single-drop four-opening film clamp for a row-type bottle making machine according to claim 2, characterized in that: The third mounting hole (40) has a first gap groove (38) on its side. The first gap groove (38) is vertically connected to the first gap adjustment hole (39). The screw that cooperates with the first gap adjustment hole (39) adjusts the gap size of the first gap groove (38).

8. The single-drop four-opening film clamp for a row-type bottle making machine according to claim 3, characterized in that: The fourth mounting hole (33) has a second gap groove (35) on its side. The second gap groove (35) is vertically connected to the second gap adjustment hole (34). The screw that cooperates with the second gap adjustment hole (34) adjusts the gap size of the second gap adjustment hole (34).

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