A bottle cap production mold closing mechanism and a control method thereof

Abstract

The present application relates to the technical field of bottle cap production, and discloses a bottle cap production mold closing mechanism and a control method thereof, which solves the problem that the improperly installed metal ring in the mold closing mechanism damages the mold during the pressing forming process, and comprises a lever mechanism, a driving shaft is arranged in the lever mechanism, a driving wheel is arranged on the driving shaft, one end of a sliding block is connected to the lever mechanism, the end of the sliding block extends into the lever mechanism and is arranged in a convex manner above the driving wheel, and the other end of the sliding block away from the lever mechanism is slidingly connected to a pressing block; the lever mechanism drives the driving shaft to ascend and descend, so that the driving wheel and the convex end of the sliding block are in contact or separated; the sliding block is translated and the pressing block is vertically lifted by the contact between the driving wheel and the convex end of the sliding block; a linkage reset rod moves with the lever mechanism to support and limit the sliding block or reset and release the sliding block; the vertical movement of the pressing block drives the mold to open or close. The present application is used for the pressing plastic forming mold and its control in the bottle cap production.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bottle cap production, in particular to a bottle cap production mold closing mechanism and a control method thereof. BACKGROUND

[0002] The working process of bottle cap production equipment covers the whole process from raw material forming to final packaging. Its core mechanism includes forming equipment, assembly equipment, sealing and detection equipment, cap rotating equipment and automatic control system, and each module works cooperatively to ensure efficient and accurate production.

[0003] The forming equipment is the basic link of bottle cap production, mainly including injection molding machines and compression molding machines. The mold closing part, i.e. the bottle cap forming mold, is the core equipment for plastic bottle cap production, and it is also divided into two types: injection molding and compression molding. The injection molding mold injects molten plastic into a precise cavity under high pressure, and after cooling, a bottle cap with complex structure is formed. Its core includes multi-cavity cavity, hot runner system and ejection mechanism, and it has the characteristics of high efficiency and high precision. The compression molding mold uses semi-plasticized material embryo to form by pressure cooling, and the process temperature is relatively low, which is suitable for continuous production. The key components include a quantitative extrusion device and a rotary disc mold set. Injection mold is suitable for high complexity bottle cap, while compression mold has cost advantage in standard thread cap production.

[0004] When the mold closing mechanism of the compression molding device is used to compression mold the bottle cap, sometimes the bottle cap product needs to install a built-in metal ring for fixing the reinforced plastic bottle cap in the interior of the bottle cap at the same time of the bottle cap forming. Therefore, the metal ring needs to be first sleeved on the compression molding mold, and then the bottle cap is molded around the metal ring on the mold through compression molding, so as to directly fix the metal ring in the interior of the bottle cap during molding. In the existing technology, the mold closing and molding process is completed with the downward movement, that is, the mechanism completes mold closing while moving downward. However, when the metal ring is not correctly installed on the mold during the process, the metal ring will cause extrusion and wear to the mold during the mold closing and molding process, thereby damaging the mold and causing serious loss and hindering the subsequent bottle cap production. SUMMARY

[0005] To solve the problem that the incorrectly installed metal ring in the mold closing and molding process of the existing bottle cap production mold damages the mold, the present application provides a bottle cap production mold closing mechanism and a control method thereof.

[0006] The technical solution adopted by the present application is:

[0007] The utility model relates to a bottle cap production mould closing mechanism, including the lever mechanism, be provided with driving shaft in the lever mechanism, be provided with driving wheel on the driving shaft, one end of the lever mechanism is connected with the slider, the end of slider goes into the inside of lever mechanism and is provided with the convexity above the driving wheel, the other end of slider far away from the lever mechanism is connected with the top block of sliding,

[0008] Wherein, the connection between the slider and the top block is contacted and slidably connected by setting two inclined surfaces, the lever mechanism is used for driving the driving shaft and the driving wheel to lift to make the driving wheel contact or separate from the end of the slider, the slider is used for translating after contacting with the driving wheel through the convex end and lifting the top block through the contact and sliding of the inclined surface, the top block is used for connecting the push plate and lifting the bottle cap production mould through driving the push plate.

[0009] Further, the lever mechanism is connected with the first connecting plate, the first connecting plate is connected with the reset rod, the reset mounting hole for installing the reset rod is formed in the slider, the bottom of the reset rod is arranged in the slider through the reset mounting hole, and the limit supporting mechanism is connected to the bottom end of the reset rod;

[0010] Wherein, the first connecting plate is used for driving the reset rod to move synchronously through the movement of the lever mechanism, the limit supporting mechanism is used for separating or contacting with the slider through the depression or lifting of the reset rod, and the slider is reset or supported and limited, so that the top block in contact with the slider is reset or supported and lifted.

[0011] Further, the limit supporting mechanism includes a stopper connected to the bottom end of the reset rod and a limit frame sleeved on the outer surface of the stopper, the bottom of the stopper is connected with a spring, the bottom of the slider is provided with a bottom limit groove matched with the stopper, and the top surface of the limit frame is connected with the slider;

[0012] Wherein, the limit frame is used for limiting the movement direction of the stopper to be the same as the lifting direction of the reset rod, and the stopper is used for cooperating with the bottom limit groove of the stopper after following the reset rod to lift and limiting and blocking the reset retreat of the slider through the prestress of the spring.

[0013] Further, the outer side surface of the limit frame is further sleeved with a pressing block, the top end surface of the pressing block is arranged in the same plane with the top end surface of the limit frame and forms the moving plane of the slider, and the pressing block is used for supporting the slider to move along the top end surface of the pressing block and the limit frame during the lifting and resetting actions.

[0014] Further, the dial lever mechanism is internally provided with a driven shaft, the driven shaft is provided with a driven wheel, the driven wheel is connected and transmission matched with the driving wheel, the dial lever mechanism is externally connected with a support mechanism, the support mechanism is provided with a wear plate for friction matching with the driven wheel, and the wear plate is arranged on the support mechanism and close to one side of the dial lever mechanism.

[0015] Further, the top surface of the top block is wider than the bottom surface, the side opposite to the inclined surface of the top block is provided with a vertical plane perpendicular to the translation direction of the sliding block, and the vertical plane of the top block is attached and slidingly connected with an end limiting block.

[0016] A control method of a mold closing mechanism of a bottle cap production mold, comprising the following steps:

[0017] S100, driving the dial lever mechanism to drive the driving shaft to lift, so that the driving wheel contacts or separates from the protruding end of the sliding block;

[0018] S200, pushing the sliding block to translate through the contact of the driving wheel and the protruding end of the sliding block, and converting the horizontal displacement into the vertical lifting of the top block through the sliding matching of the sliding block and the inclined surface of the top block;

[0019] S300, the linkage reset rod moves with the dial lever mechanism, and the sliding block is supported and limited or reset released through the limiting support mechanism;

[0020] S400, driving the push plate to perform mold opening or closing action through the vertical movement of the top block.

[0021] Further, the driving process of the dial lever mechanism in step S100 further comprises:

[0022] After the driving shaft is lifted following the dial lever mechanism, the driven wheel engaged with the driving wheel contacts the wear plate of the support mechanism, the sliding friction between the driven wheel and the wear plate of the support mechanism eliminates the radial runout of the driving wheel, and the pressure applied by the wear plate to the driven wheel provides support force for the dial lever mechanism;

[0023] The wear plate is made of wear-resistant material, and the friction coefficient of the wear plate and the contact pressure with the driven wheel are set to make the driven wheel not slip in the lifting stroke.

[0024] Further, the control method of the top block in step S200 further comprises: the inclination angle between the contact surface of the inclined surface of the sliding block and the inclined surface of the top block and the moving direction of the sliding block is controlled to be 30°-60°, so that the horizontal thrust of the sliding block acting on the top block generates different vertical components according to the size of the inclination angle.

[0025] Further, the action control of the limiting support mechanism in the step S300 further comprises:

[0026] When the dial lever mechanism drives the reset lever to rise, the stopper is embedded into the bottom surface limiting groove of the sliding block under the action of the spring pre-tightening force, forming a rigid block to the translational movement of the sliding block; in the sliding block reset stage, the reset lever is controlled to press down to drive the stopper to compress the spring and exit the bottom surface limiting groove, and the limiting frame maintains the vertical movement track of the stopper, so that the sliding block is reset; in the sliding block translation stage, the pressure block and the top end surface of the limiting frame jointly constitute the translational guide plane of the sliding block.

[0027] The beneficial effects of the present application are:

[0028] The mold closing mechanism of the bottle cap production mold of the present application controls the contact and separation of the driving wheel and the convex end of the sliding block through the dial lever mechanism, and realizes the step-by-step execution of the mold closing and pressing actions: first, the driving wheel is lifted to push the sliding block to move horizontally, and the inclined contact surface is used to make the top block vertically lift to complete the mold opening, at this time the metal ring is installed; after the installation of the metal ring is completed, the above steps are executed in reverse, the dial lever mechanism drives the driving wheel to descend, the sliding block retreats, the top block descends and the push plate resets, the mold closing is realized, and after the mold closing is completed, if it is found that the mold closing is abnormal due to the abnormal position of the metal ring, the dial lever mechanism will not continue to press and the mold will be opened for inspection and position repair, avoiding the damage of the metal ring to the mold caused by the pressure; if the mold closing is normal, the dial lever mechanism continues to press to complete the plastic forming. The mold closing mechanism of the bottle cap production mold and the control method thereof avoid the mold wear caused by the deviation of the metal ring in the synchronous pressing and mold closing operation in the prior art, forcibly realize the time sequence control of "mold closing positioning first and then pressing forming", which not only guarantees the successful positioning of the metal ring and the mold, but also eliminates the risk of the metal ring mispositioning and extruding the mold in the pressing forming process, significantly improves the mold life and product qualification rate. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the mold closing mechanism of the bottle cap production mold of the present application;

[0030] Figure 2 It is a flow chart of the mold closing mechanism control method of the bottle cap production mold of the present application.

[0031] Reference signs:

[0032] 1-gantry, 2-wear plate, 3-dial lever mechanism, 4-reset lever, 5-sliding block, 6-top block, 7-pressure block, 8-limiting frame, 9-stopper, 10-driving shaft, 11-driving wheel, 12-driven shaft, 13-driven wheel, 14-end limiting block. DETAILED DESCRIPTION

[0033] The present application will be described in detail below in combination with the drawings and examples.

[0034] Embodiment 1: a bottle cap production mold closing mechanism, as shown in the figure, comprising a lever mechanism 3, a driving shaft 10 is arranged in the lever mechanism 3, a driving wheel 11 is arranged on the driving shaft 10, one end of a sliding block 5 is connected with the lever mechanism 3, the end of the sliding block 5 extends into the inside of the lever mechanism 3 and is arranged in a protruding manner above the driving wheel 11, and the other end of the sliding block 5 away from the lever mechanism 3 is slidingly connected with a top block 6; Figure 1

[0035] Wherein, the connection between the sliding block 5 and the top block 6 is in contact and slidingly connected through the arrangement of two inclined surfaces, the lever mechanism 3 is used to drive the driving shaft 10 and the driving wheel 11 to lift to make the driving wheel 11 contact or separate from the end of the sliding block 5, the sliding block 5 is used to translate after contacting the driving wheel 11 through the protruding end and to lift the top block 6 through the contact and sliding of the inclined surfaces, and the top block 6 is used to externally connect a push plate and to open or close the mold by driving the push plate to move.

[0036] The core function of the bottle cap production mold closing mechanism of the embodiment is to separate the mold opening and closing action from the final pressing forming action. One end of the sliding block 5 is designed in a protruding manner, extends into the inside of the lever mechanism 3 and is suspended above the driving wheel 11; the other end of the sliding block 5 is slidingly connected with the top block 6 through two mutually abutting inclined surfaces. The working process of the mechanism is as follows: when closing or opening the mold is needed, the lever mechanism 3 is driven to drive the driving shaft 10 and the driving wheel 11 to lift, when the driving wheel 11 is lifted, the wheel surface contacts and pushes upward the protruding end of the sliding block 5, since the sliding block 5 is constrained, the pushing force forces the sliding block 5 to translate horizontally (as shown in the figure, when the driving wheel 11 is lifted and contacts the sliding block 5, the sliding block 5 moves to the right, and when the driving wheel 11 is lowered and separates from the sliding block 5, the sliding block 5 moves back to the left); Figure 1 When the sliding block 5 translates, the inclined surfaces in contact with the top block 6 slide, due to the action of the inclined surfaces, the horizontal movement of the sliding block 5 is converted into the vertical lifting movement of the top block 6, and the top block 6 externally connects the push plate, and the push plate directly acts on the mold. Therefore, the lifting or lowering of the top block 6 drives the push plate to execute the mold opening or closing action. When the driving wheel 11 is lowered to separate from the protruding end of the sliding block 5, the pushing of the sliding block 5 is cancelled. It should be noted that after the driving wheel 11 is lifted to push the sliding block 5 to the position, a limiting and blocking component can be arranged to block and limit the back movement of the sliding block 5, so that the mold is always kept in the open position, and the limiting structure of the sliding block 5 can be directly applied according to the limiting and blocking mechanism in the prior art.

[0037] ​The opening and closing of the mold is converted from horizontal driving movement to vertical lifting by the contact / separation of the driving wheel 11 and the protruding end of the slider 5, and the direction conversion of the inclined sliding of the slider 5 and the top block 6, which is independent of the pressing action of the mold closing mechanism and forms a controllable step. This makes it possible to complete the mold closing before the bottle cap is molded, ensures that the metal ring is accurately set in the specified position of the mold, and then performs the pressing molding action to complete the pressure molding. The logical setting of the action avoids the risk of mold damage caused by the offset of the metal ring when the mold closing and pressing are synchronized.

[0038] In this embodiment, the lever mechanism 3 is connected with a first connecting plate, the first connecting plate is connected with the reset rod 4, the slider 5 is provided with a reset mounting hole for mounting the reset rod 4, the bottom of the reset rod 4 penetrates through the reset mounting hole and is arranged in the slider 5, and the bottom end of the reset rod 4 is connected with a limiting support mechanism. The first connecting plate is used to drive the reset rod 4 to move synchronously through the movement of the lever mechanism 3, the limiting support mechanism is used to separate or contact the slider 5 through the pressing or lifting of the reset rod 4, and allows the slider 5 to reset or support and limit the slider 5, so that the top block 6 in contact with the slider 5 is reset or supported and lifted.

[0039] As a preferred embodiment, the limiting support mechanism includes a stop block 9 connected with the bottom end of the reset rod 4 and a limiting frame 8 sleeved on the outer surface of the stop block 9, the bottom of the stop block 9 is connected with a spring, the bottom of the slider 5 is provided with a bottom limiting groove matched with the stop block 9, and the top surface of the limiting frame 8 is connected with the slider 5. The limiting frame 8 is used to limit the movement direction of the stop block 9 to be the same as the lifting direction of the reset rod 4, the stop block 9 is used to cooperate with the bottom limiting groove of the stop block 9 after following the lifting of the reset rod 4 and to limit and block the reset and return of the slider 5 through the pre-tightening force of the spring. Preferably, a pressing block 7 can also be sleeved on the outer side of the limiting frame 8, the top end surface of the pressing block 7 and the top end surface of the limiting frame 8 are arranged in the same plane and form a moving plane of the slider 5, and the pressing block 7 is used to support the slider 5 to move along the top end surface of the pressing block 7 and the limiting frame 8 in the lifting and resetting action.

[0040] In this embodiment, the reset rod 4 and the limiting support mechanism are added on the basis of the foregoing embodiments, which are used to control the reset and support and limit of the slider 5 at a specific position. The lever mechanism 3 is connected with the first connecting plate, the first connecting plate is connected with the reset rod 4, the bottom of the reset rod 4 penetrates through the reset mounting hole on the slider 5 and is connected with the limiting support mechanism, and the limiting support mechanism is located below the slider 5. The limiting support mechanism mainly includes the stop block 9, the limiting frame 8, the bottom limiting groove and the spring, the stop block 9 is connected with the bottom end of the reset rod 4, the limiting frame 8 is sleeved on the stop block 9 to constrain the vertical movement of the stop block 9, the spring is arranged below the stop block 9 to provide a pre-tightening force, and the bottom of the slider 5 is provided with the bottom limiting groove matched with the shape of the stop block 9.

[0041] The specific working process of the embodiment is as follows: accompanying the lifting linkage of the dial lever mechanism 3, when the dial lever mechanism 3 drives the reset lever 4 to rise, the stop block 9 moves upward, the bottom end position of the reset lever 4 has been lifted to be higher than the top end plane of the limiting frame 8 when the driving wheel 11 touches the protruding end of the sliding block 5, after the sliding block 5 is moved to the position under continuous movement, under the action of the spring pre-tightening force, the stop block 9 will be embedded into the bottom surface limiting groove at the bottom of the sliding block 5, forming a rigid block, firmly limiting the sliding block 5 from retreating at the current position, thereby stabilizing the jacking top block 6 and the mold closing state of the mold, providing stable support for safely placing the metal ring. When the sliding block 5 needs to be reset, the dial lever mechanism 3 drives the reset lever 4 to press down, the reset lever 4 pushes the stop block 9 to move downward against the spring force, so that the stop block 9 is disengaged from the bottom surface limiting groove of the sliding block 5, at this time the sliding block 5 loses the block and can retreat to the original position horizontally along the translation plane composed of the pressing block 7 and the top end surface of the limiting frame 8 under the action of other forces (such as spring or external driving force), so that the top block 6 and the push plate connected thereto are lowered to complete the mold closing. The pressing block 7 is sleeved outside the limiting frame 8, and the top end surface thereof is flush with the top end surface of the limiting frame 8, which together provides a stable support plane for the translation movement of the sliding block 5. The embodiment realizes the reliable rigid limiting support of the sliding block 5 at the jacking working position through the embedding and disengaging of the stop block 9 and the bottom surface limiting groove of the sliding block 5, ensures the stability in the mold opening state, and allows the sliding block 5 to reset smoothly when needed, further ensuring the accuracy and safety of the metal ring placing and mold operation stage.

[0042] Embodiment 3: Based on the foregoing embodiments, in the embodiment, a driven shaft 12 is further arranged in the dial lever mechanism 3, the driven shaft 12 is provided with a driven wheel 13, the driven wheel 13 is connected and transmission matched with the driving wheel 11, a support mechanism is connected outside the dial lever mechanism 3, a wear-resistant plate 2 for friction matching with the driven wheel 13 is arranged on the support mechanism, and the wear-resistant plate 2 is arranged on the support mechanism close to one side of the dial lever mechanism 3.

[0043] The embodiment is based on the previous embodiment, and enhances the stability and anti-interference ability of the dial lever mechanism 3. A driven shaft 12 and a driven wheel 13 mounted thereon are additionally arranged inside the dial lever mechanism 3. The driven wheel 13 is connected with the driving wheel 11 through meshing or friction, etc., to realize transmission cooperation. A wear-resistant plate 2 is mounted on the side of the support mechanism facing the dial lever mechanism 3. When the dial lever mechanism 3 performs the lifting action, the driven wheel 13 mounted in the dial lever mechanism 3 is lifted. In the process of lifting the dial lever mechanism 3 to the working position or stabilizing in the working position, the outer edge of the driven wheel 13 contacts and presses the wear-resistant plate 2 on the support mechanism. The wear-resistant plate 2 is made of high-wear-resistant material, and the contact pressure between the wear-resistant plate 2 and the driven wheel 13 is set to be the friction force generated by the pressure, which can support the dial lever mechanism 3 from falling back under its own weight. The sliding friction between the driven wheel 13 and the wear-resistant plate 2 of the structure effectively consumes the radial runout or vibration energy that may be generated by the driving wheel 11 and the transmission system, significantly improving the stability of the dial lever mechanism 3 during lifting; the support force applied by the wear-resistant plate 2 to the driven wheel 13 can be transmitted to the entire dial lever mechanism 3, providing an additional external support point for the working position after lifting, enhancing the ability of the dial lever mechanism 3 to resist the working load and reducing the risk of deformation. The embodiment utilizes the frictional contact between the driven wheel 13 and the wear-resistant plate 2 to effectively suppress the radial runout during the operation of the mechanism, improve the accuracy and stability of the movement and positioning of the dial lever mechanism 3, and enhance the overall rigidity of the mechanism through external support, providing a more reliable basis for the accurate execution of the mold opening and closing action.

[0044] Embodiment 4: The embodiment is based on the previous embodiment. In the embodiment, the top surface of the top block 6 is wider than the bottom surface, the side of the top block 6 opposite to the inclined surface is arranged as a vertical plane perpendicular to the translation direction of the sliding block 5, and the vertical plane of the top block 6 is connected with an end limiting block 14 through fitting and sliding. The end limiting block 14 is used to limit the movement direction of the top block 6 to be vertical when the top block 6 exerts pressure on the side of the inclined surface of the sliding block 5.

[0045] The embodiment optimizes the structure and movement guide of the top block 6 based on the foregoing further embodiments, and ensures the perpendicularity of the movement direction of the top block 6. Specifically, the top block 6 is designed to have a top surface wider than a bottom surface, forming a wedge-shaped or trapezoidal cross section. The other side of the top block 6 opposite to the inclined contact surface is designed as a vertical plane perpendicular to the translation direction of the sliding block 5. An end limiting block 14 is arranged on one side of the vertical plane, which closely fits the vertical plane of the top block 6 and allows relative sliding between them in the vertical direction. When the sliding block 5 is translated under the push of the driving wheel 11, a pressure is applied to the top block 6 through the inclined contact surface, which can be decomposed into two components: a normal component along the inclined surface, and a tangential component driving the top block 6 to move along the sliding direction of the inclined surface. Since the other side of the top block 6 is constrained by the end limiting block 14, the end limiting block 14 limits the top block 6 to slide only along the vertical plane in contact with it, i.e. in the vertical direction, and any attempt of the top block 6 to deviate from the vertical direction will be limited and prevented by the end limiting block 14. Therefore, the horizontal thrust of the sliding block 5 acting on the inclined surface of the top block 6 is uniquely converted into the vertical lifting movement of the top block 6.

[0046] The embodiment forcibly converts the inclined force transmitted by the sliding block 5 into the pure vertical linear motion of the top block 6 by the unique shape of the top block 6 and the constraint of the end limiting block 14 on the vertical plane, eliminates the risk of deflection or jamming of the top block 6 during lifting, and ensures the precision and reliability of the mold push plate action, which is the key guarantee for precise opening and closing of the mold.

[0047] Embodiment 5: The embodiment is a control method for a mold closing mechanism for bottle cap production, as shown in Figure 2 The method comprises the following steps:

[0048] S100, driving the lever mechanism 3 to drive the driving shaft 10 to lift, so that the driving wheel 11 is in contact with or separated from the protruding end of the sliding block 5;

[0049] S200, pushing the sliding block 5 to translate by the contact between the driving wheel 11 and the protruding end of the sliding block 5, and converting the horizontal displacement into the vertical lifting of the top block 6 by the sliding cooperation between the sliding block 5 and the inclined surface of the top block 6;

[0050] S300, the linkage reset rod 4 moves with the lever mechanism 3, and supports and limits or releases the reset of the sliding block 5 through the limiting support mechanism;

[0051] S400, driving the push plate to perform mold opening or closing action by the vertical movement of the top block 6.

[0052] As a preferred embodiment, the driving process of the lever mechanism 3 in step S100 further comprises:

[0053] After the control of the driving axle 10 following the lifting of the lever mechanism 3, the driven wheel 13 engaged with the driving wheel 11 contacts the support mechanism wear plate 2, the radial movement of the driving wheel 11 is eliminated through the sliding friction between the driven wheel 13 and the support mechanism wear plate 2, and the support force for the lever mechanism 3 is provided through the pressure applied by the wear plate 2 to the driven wheel 13.

[0054] Wherein, the wear plate 2 is made of wear-resistant material, and the friction coefficient and the contact pressure of the wear plate 2 with the driven wheel 13 are set to make the driven wheel 13 not slip in the lifting stroke.

[0055] As a preferred embodiment, the control method of the top block 6 in step S200 further comprises: the inclination angle between the contact surface of the inclined surface of the sliding block 5 and the inclined surface of the top block 6 and the moving direction of the sliding block 5 is controlled to be 30°-60°, so that the horizontal thrust of the sliding block 5 acting on the top block 6 generates different vertical components according to the size of the inclination angle.

[0056] As a preferred embodiment, the action control of the limiting support mechanism in step S300 further comprises:

[0057] When the lever mechanism 3 drives the reset rod 4 to rise, the stop block 9 is embedded into the bottom surface limiting groove of the sliding block 5 under the action of the spring pre-tightening force, forming a rigid block to the translational movement of the sliding block 5; in the reset stage of the sliding block 5, the reset rod 4 is controlled to press down to drive the stop block 9 to compress the spring and exit the bottom surface limiting groove, and the limiting frame 8 maintains the vertical movement trajectory of the stop block 9, so as to reset the sliding block 5; the pressure block 7 and the top end surface of the limiting frame 8 jointly constitute the translational guide plane of the sliding block 5 in the translational movement of the sliding block 5.

[0058] The embodiment provides a control method special for the mold closing mechanism in the foregoing embodiment, and the core is to realize the time sequence separation operation process of safe mold closing and metal ring placement first and then downward forming. Specifically, first, the device drives the lever mechanism 3 to rise, drives the driving shaft 10 and the driving wheel 11 to rise, makes the driving wheel 11 contact the protruding end of the sliding block 5 (if the mechanism contains the embodiment 3, the driving wheel 11 rises to drive the driven wheel 13 to contact the wear-resistant plate 2 to obtain support and damping), then the driving wheel 11 drives the sliding block 5 to horizontally translate, the sliding block 5 converts the horizontal displacement into the vertical lifting of the top block 6 through the sliding cooperation of the inclined surface of the sliding block 5 and the inclined surface of the top block 6, drives the push plate to complete the mold opening action, at this time, the mold is opened. At the same time, the reset rod 4 rises with the lever mechanism 3, if the mechanism contains the embodiment 2, the reset rod 4 rises to drive the stop block 9 to embed into the bottom surface limiting groove of the sliding block 5 under the action of the spring, locks the position of the sliding block 5, and stabilizes the opening state of the mold. The operator can place the metal ring on the mold, after the metal ring is placed, the steps of opening the mold are executed in reverse, the driving wheel 11 is lowered to be separated from the protruding end of the sliding block 5, if the embodiment contains the embodiment 2, the reset rod 4 first drives the stop block 9 to be lowered to drive the stop block 9 to be separated from the bottom surface limiting groove, releases the locking of the sliding block 5, the sliding block 5 translates back to make the top block 6 also lower to drive the push plate to close the mold, at this time, the mold is safely closed but no pressure is applied to the mold, if it is found that the metal ring position is abnormal to cause the mold closing to be abnormal (such as the mold is not completely closed or the resistance is too large), the control system pauses the process, the lever mechanism 3 and the reset rod 4 do not continue to be pressed, and the mold opening action can be directly executed, that is, the mold is driven to be opened and is checked and repaired, at this time, the downward forming action is prevented, and the mold is protected. If the metal ring is placed normally, the control system issues an instruction to continue to press the lever mechanism 3 and the reset rod 4. At this time, the sliding block 5 and the top block 6 remain in the original position, the downward action of the lever mechanism 3 drives the entire mold assembly to complete the final plastic forming through other structures (the downward driving execution components which are not shown in the figure but necessarily exist). After the forming is completed, the mold opening action is executed again, the lever mechanism 3 is driven to rise to make the driving wheel 11 contact the protruding end of the sliding block 5, drives the sliding block 5 to translate, drives the top block 6 to rise, and the cap product is ejected through the ejection mechanism of the mold. If the embodiment contains the embodiment 2, the reset rod 4 rises with the lever mechanism 3, the stop block 9 is embedded into the limiting groove of the sliding block 5 again to lock the mold opening position.

[0059] The control of the embodiment ensures that the mold must complete the metal ring placement and safe mold closing first, and then the downward action is executed, and a protection mechanism for interrupting the downward forming process when the mold closing is abnormal is arranged, only when the metal ring is placed correctly and the mold closing state is normal, the subsequent downward forming action is allowed and executed, and the problem that the metal ring is offset and pressed to damage the mold due to synchronous downward mold closing in the prior art is completely avoided.

[0060] The above embodiments only express the specific implementation of the present application, which is described in more detail and in more detail, but cannot be understood as a limitation on the scope of the patent of the present application. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of protection of the present application.

Claims

1. A bottle cap production mold closing mechanism characterized by comprising: The push rod mechanism is internally provided with a driving shaft, the driving shaft is provided with a driving wheel, one end of a sliding block is connected to the push rod mechanism, the end of the sliding block extends into the inside of the push rod mechanism and is provided above the driving wheel in a protruding manner, the other end of the sliding block away from the push rod mechanism is slidingly connected with a top block; The connection between the sliding block and the top block is in contact and slidingly connected through two inclined surfaces, the push rod mechanism is used to drive the driving shaft and the driving wheel to lift to make the driving wheel contact or separate from the end of the sliding block, the sliding block is used to translate after the end in a protruding manner contacts the driving wheel and to lift the top block through the contact and sliding of the inclined surfaces, the top block is used to externally connect a push plate and to open or close the mold of the bottle cap production mold through the movement of the push plate; The push rod mechanism is connected with a first connecting plate, the first connecting plate is connected with a reset rod, a reset mounting hole for mounting the reset rod is formed in the sliding block, the bottom of the reset rod penetrates through the reset mounting hole and is arranged in the sliding block, and the bottom end of the reset rod is connected with a limiting support mechanism; The first connecting plate is used to drive the reset rod to move synchronously through the movement of the push rod mechanism, the limiting support mechanism is used to separate or contact with the sliding block through the depression or lifting of the reset rod and to allow the sliding block to reset or be supported and limited, so that the top block in contact with the sliding block is reset or supported and lifted; The limiting support mechanism comprises a stop block connected with the bottom end of the reset rod and a limiting frame sleeved on the outer surface of the stop block, the bottom of the stop block is connected with a spring, the bottom of the sliding block is provided with a bottom surface limiting groove matched with the stop block, and the top surface of the limiting frame is connected with the sliding block; The limiting frame is used to limit the movement direction of the stop block to be the same as the lifting direction of the reset rod, and the stop block is used to cooperate with the bottom surface limiting groove of the stop block after being lifted along with the reset rod and to limit and block the reset return of the sliding block through the pre-tightening force of the spring acting on the sliding block; The outer side surface of the limiting frame is further sleeved with a pressing block, the top end surface of the pressing block is arranged in the same plane as the top end surface of the limiting frame and forms a moving plane of the sliding block, and the pressing block is used to support the sliding block to move in translation along the top end surfaces of the pressing block and the limiting frame in the lifting and resetting actions; The push rod mechanism is further provided with a driven shaft, the driven shaft is provided with a driven wheel, the driven wheel is connected with and transmissionally matched with the driving wheel, the outside of the push rod mechanism is connected with a support mechanism, the support mechanism is provided with a wear plate for frictionally matching with the driven wheel, and the wear plate is arranged on the support mechanism on the side close to the push rod mechanism; The top surface of the top block is wider than the bottom surface, the side of the top block opposite to the inclined surface is arranged as a vertical plane perpendicular to the translation direction of the sliding block, and the vertical plane of the top block is slidingly connected with an end limiting block; the end limiting block is used to limit the movement direction of the top block to be the vertical direction when the top block exerts pressure on the side of the inclined surface of the sliding block; The control method of the mold closing mechanism comprises the following steps: S100, the driving lever mechanism drives the driving shaft to lift, so that the driving wheel contacts or separates from the convex end of the sliding block; The driving process of the lever mechanism in step S100 further includes: After the driving shaft is lifted following the lever mechanism, the driven wheel meshing with the driving wheel contacts the wear-resistant plate of the support mechanism, the radial movement of the driving wheel is eliminated through the sliding friction between the driven wheel and the wear-resistant plate of the support mechanism, and the lever mechanism is supported through the pressure applied by the wear-resistant plate to the driven wheel; The wear-resistant plate is made of wear-resistant material, and the friction coefficient of the wear-resistant plate and the contact pressure with the driven wheel are set to make the driven wheel not slip in the lifting stroke; S200, the sliding block is pushed to translate through the contact between the driving wheel and the convex end of the sliding block, and the horizontal displacement is converted into the vertical lifting of the top block through the sliding cooperation between the inclined surface of the sliding block and the top block; The control method of the top block in step S200 further includes that the inclination angle between the contact surface of the inclined surface of the sliding block and the top block and the moving direction of the sliding block is controlled to be 30°-60°, so that the horizontal thrust of the sliding block acting on the top block generates different vertical components according to the size of the inclination angle; S300, the linkage reset rod moves with the lever mechanism, and the sliding block is supported and limited or reset released through the limiting support mechanism; The action control of the limiting support mechanism in step S300 further includes: When the lever mechanism drives the reset rod to lift, the stop block is embedded into the bottom surface limiting groove of the sliding block under the action of the spring pre-tightening force, so as to form a rigid block to the translational motion of the sliding block; in the sliding block reset stage, the reset rod is controlled to be pressed downward to drive the stop block to compress the spring and exit the bottom surface limiting groove, the limiting frame maintains the vertical motion track of the stop block, so that the sliding block is reset; the pressing block and the top end surface of the limiting frame jointly constitute the translation guide plane of the sliding block; S400, the push plate is driven to perform mold opening or mold closing action through the vertical motion of the top block; The mold closing mechanism controls the contact and separation between the driving wheel and the convex end of the sliding block through the lever mechanism, realizes the step-by-step execution of the mold closing and pressing action, first, the driving wheel is lifted to push the sliding block to move horizontally, the top block is lifted vertically through the inclined contact surface to complete the mold opening, and the metal ring is installed at this time; after the installation of the metal ring is completed, the above steps are executed in reverse, the lever mechanism drives the driving wheel to descend, so that the sliding block retreats, the top block descends and the push plate resets, the mold closing is realized, and if the mold closing is abnormal due to the abnormal position of the metal ring after the mold closing is completed, the lever mechanism stops pressing and opens the mold for inspection and position repair, so as to avoid the damage of the metal ring to the mold caused by the pressure; if the mold closing is normal, the lever mechanism continues to press to complete the compression molding; the mold closing mechanism avoids the mold wear caused by the deviation of the metal ring in the synchronous pressing and mold closing operation, forcibly realizes the time sequence control of mold closing positioning first and then pressing molding through the mechanical structure, not only guarantees the successful positioning of the metal ring and the mold, but also eliminates the risk of the metal ring extruding the mold in the pressing molding process, significantly improves the mold life and product qualification rate.

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