Pincer type die assembly and cam ejector core integrated mechanism and application thereof

Abstract

The invention discloses a pincer type mold closing and cam core ejecting integrated mechanism and application, and belongs to the technical field of core making machine molds. The mold opening and closing unit comprises a pair of multi-connecting-rod assemblies symmetrically arranged on the two sides of a core ejecting cam, and the pair of multi-connecting-rod assemblies forms a stable clamp type structure and is used for cooperatively achieving mold opening and closing actions of a movable mold. The core ejecting unit comprises a core ejecting cam, and the core ejecting cam is provided with a mold opening position and a mold closing position; in the mold opening process, the core ejection cam makes contact with the core ejection assembly and applies ejection force, and the sand core is ejected out of the mold cavity; and when the mold is switched to a mold closing stage, the core ejection cam is separated from the core ejection assembly to ensure that the mold is in a stable closing state, so that accurate switching between sand core ejection and mold closing is achieved, and orderly proceeding of a core manufacturing procedure is ensured. The mold clamping mechanism is compact in structure, stable and accurate mold clamping force is provided on the premise that mold opening and core ejecting integrated action is achieved, and the problem of action delay of a mold clamping mechanism is effectively solved.

Description

Technical Field

[0001] The present invention mainly relates to the technical field of core-making machines for casting, and specifically to a pliers-type die-closing and cam core-pushing integrated mechanism and its application. Background Art

[0002] Core-making machines are a general term for sand shooting machines and cold core machines, mainly including a sand shooting mechanism, a die-closing mechanism, a curing box, a core-pulling and demolding mechanism, etc. The core-making machine shoots sand cores into the core box at high speed and cures or gas-cures them under certain temperature conditions, so that the sand cores in the core box are quickly formed and hardened to obtain finished products. A single cycle only takes more than ten seconds to dozens of seconds, and sand cores for casting can be produced. The cores made by the core-making machine have precise dimensions and smooth surfaces, and are widely used in the casting machinery industry.

[0003] The key structure in the design of core-making machines is the die-closing mechanism. The quality of the die-closing mechanism affects the performance, forming speed, and quality of the sand cores of the core-making machine, as well as the cost of the equipment. The existing die-closing mechanisms of core-making machines mainly adopt two types: hydraulic and pneumatic. However, on the one hand, the cylinder or oil cylinder drive lacks smoothness, requires a high sealing system, is prone to oil leakage and air leakage, polluting the environment, and its output characteristics are difficult to change flexibly; on the other hand, its output force stability is poor, and it cannot provide a smooth and precise clamping force. In addition, the traditional die-closing mechanism occupies a large area, the design cannot be compact, and there is a delay in each action, resulting in a slow production beat and unable to provide accurate data for the system.

[0004] After retrieval, the structural design of the die-closing mechanism in the prior art has been disclosed in patent documents. For example, the Chinese patent document application number: 201010527458.4, the invention creation name is: Electric die-opening and closing device for blow molding and its implementation method, which solves the defect that the existing electric die-opening and closing devices for blow molding generally use servo motors and ball screw pairs with relatively high prices, and uses a common motor, a reducer, and a crank connecting rod mechanism to achieve the die-opening and closing actions. However, the technical field mainly applied in this application is the blow molding machinery field. On the one hand, it is difficult to be directly applied to core-making equipment, on the other hand, it is difficult to ensure the provision of a smooth and precise clamping force, and in addition, it cannot complete the integrated operation of die-opening and core-pushing.

[0005] Another example is the Chinese patent document application number: 201410139214.7, the invention creation name is: Linkage mechanism for core-pulling, core-pushing and die-opening and closing of a core shooting box mold. This linkage mechanism only uses one hydraulic cylinder as the driving element, and completes the core-pulling, core-pushing, and die-opening actions in one go, saving the number of hydraulic cylinders, reducing energy consumption, and simplifying the electrical control. However, in this application, the hydraulic drive method is still used, and it is difficult to solve some drawbacks of the hydraulic drive die-closing mechanism.

[0006] To solve the above problems, through continuous in-depth research, the applicant of the present invention has developed a clamp-type die closing and cam core pushing integrated mechanism, which is reasonably designed and structurally compact. On the premise of realizing the integrated action of mold opening and core pushing, it provides a stable and accurate clamping force, effectively solves the problem of action delay of the die closing mechanism, provides accurate data for the system, and facilitates subsequent intelligent management. Summary of the Invention

[0007] To solve the above technical problems, one of the purposes of the present invention is to provide a clamp-type die closing and cam core pushing integrated mechanism and its application, which is structurally compact. On the premise of realizing the integrated action of mold opening and core pushing, it provides a stable and accurate clamping force, effectively solves the problem of action delay of the die closing mechanism, provides accurate data for the system, and facilitates subsequent intelligent management.

[0008] As the core equipment in casting production, core-making equipment integrates sand shooting, die closing, curing and core pulling and demolding mechanisms. The performance of the die closing mechanism directly affects the overall performance of the core-making machine, the molding speed, the quality of the sand core and the equipment cost investment. At present, the die closing mechanisms of core-making machines mainly rely on hydraulic and pneumatic drive modes. However, these two traditional methods have many insurmountable disadvantages: 1. Poor driving stability: The driving mechanisms of cylinders or oil cylinders have insufficient stability, have strict requirements for the sealing system, and are prone to oil leakage and air leakage. This not only pollutes the production environment, but also makes their output characteristics rigid and difficult to adjust flexibly according to the actual working conditions, seriously affecting the operation stability and production continuity of the equipment, and bringing additional maintenance costs and production risks to enterprises.

[0009] 2. Large fluctuation of clamping force: The output force has poor stability and cannot provide a continuous and accurate clamping force for the mold, resulting in difficult control of the dimensional accuracy of the sand core during the molding process, a high rejection rate, greatly increasing the production cost, weakening the market competitiveness of products, and restricting the improvement of enterprise economic benefits.

[0010] 3. Obvious structural defects: The traditional die closing mechanism has a scattered layout, occupies a large area, has poor design compactness, and each action is accompanied by obvious delay, slowing down the production rhythm, resulting in low production efficiency of the equipment. At the same time, it cannot provide accurate data feedback for the production system, seriously hindering the intelligent process of the core-making machine and making it difficult to meet the strict requirements of modern casting for high-efficiency and precision production.

[0011] To solve the above technical problems, the technical solution adopted by the present invention is as follows: In the first aspect, the present invention provides a clamp-type die closing and cam core pushing integrated mechanism, including: A die opening and closing unit, the die opening and closing unit includes a pair of multi-link components symmetrically arranged on both sides of the core pushing cam, and the pair of multi-link components form a stable clamp structure for jointly realizing the die opening and closing actions of the moving die mold.

[0012] A top core unit, the top core unit comprising a top core cam, the top core cam having a mold opening position and a mold closing position; In the mold opening process, the ejector cam contacts the ejector assembly and applies ejection force to smoothly eject the sand core out of the mold cavity, greatly facilitating subsequent manual or mechanical grabbing operations; When switching to the mold closing stage, the ejector cam is disengaged from the ejector assembly to ensure that the mold is firmly closed, thereby achieving precise switching between sand core ejection and mold closing and ensuring the orderly progress of the core making process.

[0013] In a manner that can be realized in the first aspect, in the mold opening stage, the top core cam rotates to the mold opening position, synchronously drives the double-sided multi-link assembly, and after the rotational force is linearly converted, the movable mold is pulled to move toward each other along a preset straight line to realize mold opening; During the mold closing stage, the top core cam reverses to the mold closing position and synchronously drives the multi-link assembly. Each component cooperates to transmit the contraction force, driving the movable mold to achieve precise alignment along a predetermined straight line.

[0014] In a manner that can be implemented in the first aspect, the multi-link assembly includes: A driving connecting rod, one end of which is rotatably connected to the top core cam and is used to receive and transmit the rotational power of the top core cam; One end of the mold opening and closing tie rod is firmly connected to the movable mold to transmit power and drive the movable mold to realize the mold opening and closing action, ensuring the accuracy and repeatability of the mold movement; And / or, in the mold closing state, the mold opening and closing pull rods and the driving connecting rods approach a horizontal position in a specific first direction, and cooperate with the rocker arm lever to build a stable force transmission structure, forming a stable triangular mechanical support system, providing a strong, continuous and stable clamping force for the mold, ensuring that the mold is tightly locked.

[0015] In an achievable manner of the first aspect, the multi-link assembly further comprises a rocker lever, both ends of which are respectively hinged to the driving link and the mold opening and closing tie rod; And / or, the geometric shapes of the driving connecting rod, the rocker lever and the mold opening and closing tie rod are not limited to rod-shaped, and may be tubular or plate-shaped structures; Alternatively, it can be customized into curved, wavy and other regular or irregular shapes according to actual working conditions, and it is only necessary to ensure that the multi-link assembly composed of the driving connecting rods, rocker levers and mold opening and closing pull rods on both sides can accurately realize the clamp-like opening and closing action and stable force transmission function.

[0016] In a manner that can be implemented in the first aspect, mounting grooves are provided at both ends of the rocker lever, and various types of hinged parts are adapted in the mounting grooves; When the rotating shaft is used as the hinged part, the hinged end of the driving connecting rod or the opening and closing mold tie rod and the rocker lever can be equipped with an annular sleeve, and the sleeve is tightly sleeved on the outer circumference of the rotating shaft to ensure flexible rotation and stable connection. Furthermore, the annular sleeve and the rotating shaft adopt a clearance fit or a high-precision rolling bearing fit mode; Alternatively, a precise hinge hole is designed at the hinged end of the driving connecting rod or the mold opening and closing tie rod and the rocker lever, and the hinge hole wall is closely matched with the rotating shaft, so that the rotating shaft passes through accurately to achieve reliable hinge connection; When a sleeve is used as a hinged member, a hinged end of the driving connecting rod or the mold opening and closing tie rod is provided with a hinged shaft, and the internal cavity of the sleeve is used to accommodate the hinged shaft.

[0017] The above structure can effectively reduce friction loss, improve rotation efficiency, and extend service life. It can also comprehensively ensure that all components are tightly connected, rotate flexibly, and transmit force accurately and efficiently, thus providing a basis for the stability and reliability of mold opening and closing actions.

[0018] In a manner that can be realized in the first aspect, the multi-link assembly and the movable mold are firmly connected by means of an opening and closing template, and a guide sleeve seat is provided at the bottom of the opening and closing template; The guide sleeve seat is slidably mounted on the guide rail and slides linearly along the length direction of the guide rail to provide precise guidance for the opening and closing actions of the movable mold.

[0019] In an achievable manner of the first aspect, the guide rails are configured in pairs and symmetrically distributed on both sides of the multi-link assembly to form a stable support and precise guiding structure; The bottom of the guide sleeve seat is tightly matched with the guide rail in two optimized ways: Firstly, a guide groove is provided at the bottom of the guide sleeve seat, and the two inner side walls of the guide groove fit with the outer periphery of the guide rails on both sides to achieve high-precision guiding; Secondly, a pair of sliding parts is provided at the bottom of the guide sleeve seat, and the pair of sliding parts matches the guide rails on both sides to ensure that the guide sleeve seat slides on the guide rails without any deviation or shaking, and the motion trajectory error of the movable mold is controlled within a very small range, which significantly improves the positioning accuracy and repeatability of the opening and closing molds, effectively guarantees the consistency of the sand core molding size and the quality stability, and meets the strict standards of precision casting.

[0020] In an achievable manner of the first aspect, the top core unit further includes: A cam plate, one end surface of which is used to be in close contact with the top core cam and to receive the power transmitted by the top core cam, and a top core rod is installed on the cam plate; The ejector plate is firmly connected to the ejector rod and fits tightly with the mold base plate. During the ejector process, the ejector rod transmits power to ensure that the sand core is ejected from the mold base plate intactly and without damage. · When the core-pushing cam rotates, power is efficiently transmitted from the cam plate to the core-pushing rod and then to the core-pushing plate in sequence. The core-pushing plate instantaneously generates a strong and uniform core-pushing force, ensuring that the core is completely and undamagedly ejected from the mold substrate. All components cooperate smoothly and efficiently, providing a solid guarantee for the core ejection operation.

[0021] In an implementable manner of the first aspect, the core-pushing unit further includes: A guide plate, which is located between the cam plate and the core-pushing plate, and is provided with a through hole for the core-pushing rod to stably pass through in a straight line direction. The core-pushing rod smoothly passes through this through hole, ensuring that the core-pushing rod moves strictly in a straight line direction and stably during the core-pushing process, effectively avoiding phenomena such as deflection and jamming, and providing a reliable guarantee for the accuracy of the core-pushing action.

[0022] And / or, the number of the core-pushing rods is not limited to one.

[0023] In an implementable manner of the first aspect, the cam plate is configured with a return spring. One end of the return spring is closely connected to the cam plate, and the other end is firmly connected to the guide plate; After the mold closing is completed, when the core-pushing cam is separated from the cam plate instantaneously, the return spring rapidly releases energy by virtue of its own elastic potential energy, pulling the cam plate back to the initial standby position smoothly, preparing for the next core-pushing cycle operation, effectively maintaining the stable cyclic operation rhythm of the mechanism, and significantly improving the production beat and overall production efficiency; And / or, the number of the return springs is not limited to one, and can be flexibly set according to the actual working conditions; And / or, the return spring is sleeved on the outer periphery of the guide rod, and the guide rod is installed on the cam plate.

[0024] In an implementable manner of the first aspect, the core-pushing cam has a cam core-pushing part, which is an irregular circular structure, and the cam core-pushing part is used to contact the cam plate to push out the core.

[0025] During the contact transmission process with the cam plate, this shape can adaptively adjust the magnitude and direction distribution of the core-pushing force according to the core forming condition and the demolding mechanics requirements, ensuring that the core-pushing force acts on the core evenly and gently, effectively avoiding the risk of damage and rupture of the core caused by local force concentration, significantly improving the core ejection success rate and the finished product quality, greatly reducing the scrap rate, and deeply optimizing the production cost control.

[0026] In an implementable manner of the first aspect, it further includes: a driving unit, which includes a driving motor and a driving shaft, and the driving shaft is used to drive the core-pushing cam to perform eccentric rotation.

[0027] The drive motor can be flexibly selected from servo motors, stepper motors or reduction motors according to actual production needs to accurately match the power and control characteristics requirements under different working conditions.

[0028] In an achievable manner of the first aspect, the top core cam is a pair, and the drive shaft is used to connect the pair of top core cams to form an integral structure, namely, a cam assembly; And / or, both ends of the cam assembly are rotatably connected to a pair of the multi-link assemblies respectively; And / or, both ends of the cam assembly are provided with hinged parts; When a rotating shaft is used as a hinged member, an annular sleeve is provided at the hinged end of the driving connecting rod and the cam assembly, and the annular sleeve is sleeved on the outer periphery of the rotating shaft; Alternatively, a hinge hole is provided at the hinged end of the driving connecting rod and the cam assembly, and the rotating shaft passes through the hinge hole to realize the hinge connection between the two; When a sleeve is used as a hinged member, the hinged end of the driving connecting rod has a hinged shaft, and the sleeve has a cavity inside for accommodating the hinged shaft.

[0029] In the second aspect, the present invention provides an application of a clamp-type mold clamping and cam core integrated mechanism, including the above-mentioned clamp-type mold clamping and cam core integrated mechanism, which can be used in core making machines, core shooting machines, cold core machines and other core making equipment, or on injection molding equipment.

[0030] Compared with the prior art, the present invention has the following beneficial effects: (1) The clamp-type mold clamping and cam core ejection integrated mechanism of the present invention has excellent versatility and adaptability, and is widely applicable to mainstream core making equipment such as core making machines, core shooting machines, cold core machines, and can also be applied to the field of injection molding equipment. In addition, with its highly flexible design architecture and precise control performance, it can quickly realize customized adaptation and adjustment according to different equipment process parameters, production rhythm and product specification requirements, providing efficient and reliable solutions for the mold clamping and core ejection processes of various equipment, significantly improving the overall performance and production efficiency of the equipment, and expanding the application prospects.

[0031] (2) The carefully designed mold opening and closing positions of the ejector cam in the present invention are the starting point for achieving efficient operation of the entire mechanism. At the moment of mold opening, the ejector cam accurately touches the ejector assembly and skillfully applies precise ejection force, allowing the sand core to smoothly detach from the mold cavity, creating favorable conditions for seamless connection of subsequent production links; in the mold closing stage, the ejector cam and the ejector assembly separate smoothly, and the mold closes tightly, laying a solid foundation for the precise molding of the sand core in a stable mold cavity environment.

[0032] (3)In the mold-closing state of the present invention, through delicate design and precise assembly, the driving connecting rod is in an almost ideal horizontal state in the horizontal direction. Together with the rocker lever and the mold-opening and -closing pull rod, they form a high-strength and stable triangular structure, providing a continuous and stable clamping force of thousands of Newtons or even higher for the mold, ensuring that the mold remains motionless under the working conditions of high-pressure and high-temperature sand core forming, and firmly maintaining the mold-closing accuracy at the micron level.

[0033] (4)After the mold closing is completed in the present invention, at the moment when the core-pushing cam separates from the cam plate, the return spring quickly releases energy by virtue of its own elastic potential energy, pulling the cam plate smoothly back to the initial standby position to prepare for the next core-pushing cycle operation, effectively maintaining the stable cycle operation rhythm of the mechanism, and greatly improving the production beat and overall production efficiency.

[0034] (5)In the present invention, the bilateral mold plates reach the micron-level accuracy synchronously, forming a precision mold cavity for the sand core. The sand core has precise dimensions, a smooth surface, and a dense and uniform structure, significantly reducing the rejection rate and improving the product yield and stability.

[0035] The present invention will be explained and described in detail below in conjunction with the drawings and specific embodiments. Description of the Drawings

[0036] Figure 1 It is a schematic structural diagram of the integrated mechanism of clamp-type mold closing and cam core pushing in the mold-opening state in the embodiment of the present invention; Figure 2 is Figure 1 the front view structural schematic diagram of; Figure 3 It is a schematic structural diagram of the integrated mechanism of clamp-type mold closing and cam core pushing in the mold-closing state in the embodiment of the present invention; Figure 4 is Figure 3 the structural schematic diagram after removing the base and the slide rail in; Figure 5 is Figure 3 the front view structural schematic diagram of; Figure 6 It is a partial enlarged structural schematic diagram of the core-pushing unit in the embodiment of the present invention; Figure 7 It is a structural schematic diagram of a core shooting device in the prior art, which uses a hydraulic or pneumatic method for mold opening and closing operations.

[0037] 100. Base; 110. Guide rail; 120. Avoidance groove; 200. Driving motor; 210. Reducer; 220. Driving shaft; 300. Mold opening and closing unit; 311. Driving link; 312. Rocker lever; 313. Mold opening and closing pull rod; 320. Mold opening and closing plate; 321. Guide bushing seat; 322. Guide groove; 330. Eccentric cam; 331. Cam plate; 332. Guide rod; 333. Return spring; 334. Core pushing rod; 335. Guide plate; 336. Core pushing plate; 410. Moving mold; 420. Core pulling; 430. Mold substrate. Specific embodiments

[0038] For the convenience of understanding the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of the present invention more thorough and comprehensive.

[0039] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items. Embodiment

[0041] The present invention provides an electric pliers-type mold closing and cam core pushing integrated mechanism for a core making machine, aiming to break through the traditional driving limitations. There are many disadvantages in the traditional oil cylinder and air cylinder drives: it is easy to cause environmental pollution, such as oil leakage and air leakage; the output characteristics are fixed, and the adjustment flexibility is poor; the mold clamping force stability is low, affecting the molding accuracy; the structure is complex, occupying a large area, and the action is delayed, slowing down the production rhythm and hindering the intelligent process of the core making industry. Please refer to the attached Figure 7As shown, the existing core shooting device mainly realizes the opening and closing operations of the two-side templates through the hydraulic cylinder and the air cylinder. In this process, on the one hand, since the opening and closing operations of the two-side templates are controlled pneumatically and hydraulically, it is not only difficult to accurately control the stroke, but also difficult to maintain a large clamping force under the extrusion of the upper pressing template, which is likely to cause problems such as external leakage during the sandblasting process and affect the quality of the prepared sand core. On the other hand, due to the limitations of the hydraulic cylinder and the air cylinder themselves, not only can the synchronous acquisition and upload of data not be realized, but it is also difficult to achieve accurate and seamless connection of each operation link, greatly reducing the production rhythm and production efficiency.

[0042] In the embodiment of the present invention, a reduction motor or a servo motor is paired with a speed reducer for driving, effectively solving the above problems and improving efficiency. The two-side clamping templates move synchronously, improving the accuracy of the clamping position and ensuring the product quality. Integrate the input motion of the conventional speed reducer and the servo motor to achieve programmable output, combining the reliability of the traditional machinery and the precision and intelligence advantages of the full servo motor. The output motion is flexibly controllable, the action is accurately positioned, and it is controlled according to the torque and value of the servo motor, eliminating the travel switch, being easy to maintain and flexible to adjust.

[0043] Specifically, the clamp-type clamping and cam core-pushing integrated mechanism of the embodiment of the present invention includes a clamping and opening / closing unit and a core-pushing unit: The clamping and opening / closing unit includes a pair of multi-link components, symmetrically arranged on both sides of the core-pushing cam 330, constructing a stable clamp-type structure for jointly realizing the opening and closing actions of the moving die 410.

[0044] The core-pushing unit includes a core-pushing cam 330, and the core-pushing cam 330 has an opening position and a closing position.

[0045] Refer to Figure 1 and Figure 2 As shown in, when the core-pushing cam 330 is in the opening position, the core-pushing cam 330 contacts the core-pushing component and applies a core-pushing force, prompting the sand core to be ejected from the mold, facilitating the manual / machine to grab the sand core; Refer to Figure 3 and Figure 4 As shown in, when the core-pushing cam 330 is in the closing position, the core-pushing cam 330 is disengaged from the core-pushing component, ensuring the stable closed state of the mold, thereby achieving the accurate switching between the core ejection and the mold closing, and ensuring the orderly progress of the core-making process.

[0046] In the mold opening stage, the core-pushing cam 330 rotates to the opening position, generating a strong driving force. Through the optimized transmission path, it synchronously and accurately drives the bilateral multi-link components to operate efficiently and cooperatively. After linearly converting the rotational force, it pulls the moving die 410 to move in opposite directions along the preset straight line, realizing rapid and stable mold opening.

[0047] The carefully designed mold opening and closing positions of the above-mentioned core pushing cam 330 are the starting point for the efficient operation of the entire mechanism. At the moment of mold opening, the core pushing cam 330 precisely touches the core pushing component, subtly applying a precise core pushing force, enabling the core to smoothly separate from the mold cavity, creating favorable conditions for the seamless connection of subsequent production processes; during the mold closing stage, the core pushing cam 330 separates smoothly from the core pushing component, and the mold closes tightly, laying a solid foundation for the precise molding of the core in a stable mold cavity environment.

[0048] Specifically, in this embodiment, during the mold closing stage, the core pushing cam 330 rotates back to the mold closing position, and the multi-link component responds precisely. Each component cooperatively transmits the contraction force, pulling the moving mold 410 to achieve precise alignment along the established straight line, ensuring that the mold closing accuracy reaches the micron-level standard. This cooperative driving mode provides a solid motion foundation and power guarantee for the entire process of core molding and demolding.

[0049] To achieve the refined design and functional coordination of the multi-link components, specifically, as Figure 1 shown, the multi-link component in this embodiment includes: The driving link 311, one end of which is rotatably connected to the core pushing cam 330, ensuring efficient, low-loss, and non-stuttering power transmission. Its structural strength and material properties have been rigorously optimized and calculated, and it can withstand high-intensity working loads, used to receive and transmit the rotational power of the core pushing cam 330; The mold opening and closing pull rod 313, one end of which is connected to the moving mold 410 to conduct power and drive the moving mold 410 to perform mold opening and closing actions, ensuring the accuracy and repeatability of the mold movement; Furthermore, in the mold closed state, the mold opening and closing pull rod 313 and the driving link 311, through delicate design and precise assembly, are in an almost ideal horizontal state in the horizontal direction, jointly constructing a high-strength and stable triangular structure with the rocker lever 312, providing a continuous and stable clamping force of thousands of Newtons or even higher levels for the mold, ensuring that the mold remains motionless under the high-pressure and high-temperature core molding conditions and firmly maintaining the micron-level mold closing accuracy.

[0050] Preferably, in the mold closed state, the included angle between the driving link 311 and the horizontal plane is controlled within the range of 0 to 10°, which can effectively ensure a relatively large clamping force, prevent leakage problems during subsequent sandblasting, and thus ensure the quality of subsequent core products.

[0051] The multi-link component further includes a rocker lever 312. The rocker lever 312, as a key hub for force transmission and action coordination, is hinged to the driving link 311 and the mold opening and closing pull rod 313 at both ends respectively.

[0052] In practice, the geometric shapes of the driving link 311, the rocker lever 312, and the mold opening and closing pull rod 313 are not limited to rod shapes, and can be in the form of tubular or plate structures; or, they can be customized into curved, wavy, and other regular or irregular shapes according to actual working conditions, as long as it is ensured that the multi-link assembly composed of the driving links 311, the rocker levers 312, and the mold opening and closing pull rods 313 on both sides can accurately achieve the clamping type opening and closing actions and the stable force transmission function.

[0053] Both ends of the rocker lever 312 are provided with installation grooves, and various forms of hinge parts are adapted in the installation grooves. In addition, a relief groove 120 is provided at a position corresponding to the rocker lever 312 on the base 100, which is used to accommodate the hinge movement of the rocker lever 312. Please refer to Figure 1 In the orientation shown in , both ends of the rocker lever 312 pass through the relief groove 120 and are respectively hinged to the driving link 311 and the mold opening and closing pull rod 313. Compared with the traditional pneumatic or hydraulic-driven mold opening and closing structure where the driving components need to be arranged on both sides of the mold, in this embodiment, the driving unit can be arranged below the mold, greatly saving the installation space and making the overall equipment structure more compact.

[0054] When using a rotating shaft as the hinge part, an annular sleeve is provided at the hinge end of the driving link 311 or the mold opening and closing pull rod 313 and the rocker lever 312, and the annular sleeve and the rotating shaft adopt a clearance fit or a high-precision rolling bearing fit mode; or, a precision hinge hole is designed at the hinge end of the driving link 311 or the mold opening and closing pull rod 313 and the rocker lever 312, and the hinge hole wall is in close fit with the rotating shaft.

[0055] When using a sleeve as the hinge part, a hinge shaft is provided at the hinge end of the driving link 311 or the mold opening and closing pull rod 313, and the inner cavity of the sleeve is used to accommodate the hinge shaft.

[0056] Please refer carefully to Figure 1 As shown in , in this embodiment, the multi-link assembly and the moving mold 410 are firmly connected by the mold opening and closing template 320. A guide sleeve seat 321 is provided at the bottom of the mold opening and closing template 320. The guide sleeve seat 321 is slidably sleeved on the guide rail 110 to form a high-precision sliding guide module, and linearly slides along the length direction of the guide rail 110 to provide guidance for the opening and closing actions of the moving mold 410.

[0057] To ensure the stability of the guidance, a pair of guide rails 110 are symmetrically arranged on both sides of the multi-link assembly to form a stable support and precise guidance structure. The guide rails 110 are processed by high-precision machining and precision grinding processes, and the straightness, flatness, and parallelism reach micron-level precision, and the surface hardness and wear resistance are excellent.

[0058] The bottom of the guide bushing seat can be closely fitted with the guide rail through various optimization methods: Such as Figures 1-4 shown, a guide groove 322 is opened at the bottom of the guide bushing seat 321. The guide groove 322 is formed in one time by a high-precision CNC machining center. The inner side walls on both sides thereof are closely attached to the outer periphery of the guide rail 110, and the fitting clearance is strictly controlled within a very small range to achieve high-precision guiding; Or, a pair of sliding members are provided at the bottom of the guide bushing seat 321. The pair of sliding members are matched with the guide rails 110 on both sides. The sliding members are made of self-lubricating and low-friction coefficient materials to ensure that there is no any deviation, shaking and crawling phenomenon when the guide bushing seat 321 slides on the guide rail 110, provide precise guiding for the opening and closing actions of the moving die mold 410, and improve the mold positioning accuracy to the micron level.

[0059] In practice, to ensure the efficient linkage and precise operation of the core-pulling components, specifically, the core-pulling unit further includes: A cam plate 331, one end face of which is used to contact the core-pulling cam 330 to receive the power transmitted by the core-pulling cam 330, and a core-pulling rod 334 is installed on the cam plate 331; A core-pulling plate 336, which is firmly connected to the core-pulling rod 334 and is closely attached to the mold substrate 430. During the core-pulling process, the power is conducted through the core-pulling rod 334 to ensure that the core is ejected from the mold substrate 430 completely and without damage.

[0060] When the core-pulling cam 330 rotates, the power is sequentially and losslessly conducted to the core-pulling plate 336 through the cam plate 331 and the core-pulling rod 334. The core-pulling plate 336 instantaneously generates a uniform ejection force of thousands of Newtons to ensure that the core is completely and without damage ejected from the mold substrate 430. Each component cooperates efficiently to provide a solid guarantee for the core ejection operation.

[0061] Preferably, in this embodiment, a precise guiding and resetting mechanism is further provided. The core-pulling unit further includes a guiding plate 335. The guiding plate 335 is located between the cam plate 331 and the core-pulling plate 336, and a through hole for the core-pulling rod 334 to stably pass through in a straight line direction is opened thereon to provide a stable guiding effect for the core-pulling action. The number of the core-pulling rods 334 is not limited to one and can be flexibly set according to the actual working conditions.

[0062] The cam plate 331 is configured with a return spring 333, which is sleeved on the outer periphery of the guiding rod 332, and the guiding rod 332 is installed on the cam plate 331. One end of the return spring 333 is closely connected to the cam plate 331, and the other end is firmly connected to the guiding plate 335.

[0063] After the mold is closed, at the moment when the ejector cam 330 and the cam plate 331 are separated, the return spring 333 quickly releases energy by virtue of its own elastic potential energy, and pulls the cam plate 331 to smoothly return to the initial standby position, preparing for the next ejector cycle operation, effectively maintaining the stable cycle operation rhythm of the mechanism, and greatly improving the production rhythm and overall production efficiency.

[0064] The number of the return spring 333 is not limited to one, and can be flexibly set according to actual working conditions. Figures 4-6 As shown, in this embodiment, the number of the return springs 333 is preferably two, which are symmetrically distributed on both sides of the top core cam 330 in the thickness direction, and their positions are avoided from the top core cam 330 to avoid affecting the eccentric movement of the top core cam 330, thereby ensuring the smooth completion of the mold opening and closing action and the top core action.

[0065] In the clamp-type mold clamping and cam core-pushing integrated mechanism of the present embodiment, the core-pushing cam 330 is a key component for realizing an efficient core-making process. Its unique design combines the functions of the eccentric shaft and the core-pushing function, bringing about multiple advantages.

[0066] From a structural point of view, the top core cam 330 has an eccentric function, and the drive shaft 220 runs through it to achieve eccentric rotation. This eccentric design enables the top core cam 330 to generate forces of different directions and magnitudes during the rotation process. In the mold opening stage, the eccentric rotation of the top core cam 330 drives the drive connecting rod 311 connected thereto to move. Due to the existence of the eccentric distance, the top core cam 330 can effectively convert the rotational motion into the linear displacement of the drive connecting rod 311, and then through the coordinated action of the rocker lever 312 and the mold opening and closing pull rod 313, the movable mold 410 is pulled along the guide rail 110 to achieve precise relative displacement and complete the mold opening action. Compared with the traditional mold closing drive method, this eccentric shaft driven top core cam 330 structure can provide more stable and adjustable power output, avoid the power instability and delay caused by sealing and output characteristics when the cylinder or oil cylinder is driven, and effectively improve the efficiency and accuracy of the mold opening action.

[0067] In terms of the core-pushing function, the core-pushing cam 330 has a dedicated cam core-pushing part, which is an irregular circular structure. During the mold-opening process, when the core-pushing cam 330 rotates to the mold-opening position, the cam core-pushing part is in close contact with the cam plate 331. Due to its irregular shape, during the contact process, it can adaptively adjust the magnitude and direction distribution of the core-pushing force according to the molding condition of the core in the mold substrate 430 and the demolding mechanics requirements. For example, when the adhesion force between the core and the mold is relatively large at certain parts, the cam core-pushing part can apply a relatively large and appropriately directed core-pushing force at these parts, ensuring that the core is ejected from the mold substrate 430 completely and without damage, effectively reducing the risk of damage and rupture of the core caused by local force concentration, significantly improving the core demolding success rate and the finished product quality, reducing the scrap rate, and optimizing the production cost control.

[0068] During mold-closing, the core-pushing cam 330 rotates reversely to the mold-closing position. At this time, the core-pushing cam 330 is disengaged from the core-pushing assembly, avoiding interference with the closed state of the mold and ensuring that the mold can be tightly closed, providing a guarantee for the core to be molded in a stable mold cavity environment. Moreover, during the entire mold-opening, mold-closing, and core-pushing cycle process, the movement trajectory and force change of the core-pushing cam 330 can be precisely designed and controlled. By reasonably selecting the type of the driving motor 200 (such as a servo motor, a stepping motor, or a reduction motor) and optimizing the contour curve of the core-pushing cam 330, according to different core-making process requirements, flexible adjustment of parameters such as the mold-opening and mold-closing speeds and the core-pushing force can be realized, further improving the versatility and adaptability of the mechanism and meeting the diverse production needs.

[0069] In summary, the structure of the core-pushing cam 330 plays an extremely important role in improving the core-making efficiency, ensuring the core quality, reducing the production cost, and enhancing the mechanism adaptability in this integrated mechanism through the organic combination of its eccentric shaft and the core-pushing function, and is one of the core elements for realizing the efficient and stable operation of the entire core-making process.

[0070] The clamp-type mold-closing and cam core-pushing integrated mechanism of this embodiment further includes a driving unit. The driving unit includes a driving motor 200 and a driving shaft 220. The driving shaft 220 is used to drive the core-pushing cam 330 to perform eccentric rotation.

[0071] Preferably, the driving motor 200 is a servo motor, a stepping motor, or a reduction motor, and can also adapt to other ordinary motors.

[0072] There are a pair of the core-pushing cams 330. The driving shaft 220 is used to connect the pair of core-pushing cams 330 to form an integral structure, that is, a cam assembly. The two ends of the cam assembly are respectively rotationally connected to the pair of multi-link assemblies, and hinge parts are provided at the two ends of the cam assembly.

[0073] When a rotating shaft is used as the hinge member, an annular sleeve is provided at the hinge end of the driving link 311 and the cam assembly, and the annular sleeve is sleeved on the outer periphery of the rotating shaft; alternatively, a hinge hole is provided at the hinge end of the driving link 311 and the cam assembly, and the rotating shaft passes through the hinge hole to achieve the hinge between the two.

[0074] When a sleeve is used as the hinge member, the hinge end of the driving link 311 has a hinge shaft, and a cavity is provided inside the sleeve for accommodating the hinge shaft.

[0075] In a second aspect, the present invention provides an application of a clamp-type mold closing and cam core pushing integrated mechanism, including the above-mentioned clamp-type mold closing and cam core pushing integrated mechanism, which can be used on core making machines, core shooting machines, cold core machines and other core making equipment, or on injection molding equipment.

[0076] Working principle: Principle of mold opening and closing action: The driving motor 200 is started, and the driving shaft 220 drives the core pushing cam 330 to rotate. During mold opening, the core pushing cam 330 moves along a specific curve profile, pushes the driving link 311, and the driving link 311 changes the direction and magnitude of the force through the rocker lever 312 and transmits it to the mold opening and closing pull rod 313. The mold opening and closing pull rod 313 pulls the moving mold 410 through the mold opening and closing template 320. Under the guidance of the guide sleeve seat 321 and the guide rail 110, the moving mold 410 moves linearly in opposite directions along the guide rail 110 to achieve mold opening. The mold opening speed is related to the rotation speed of the core pushing cam 330, the driving link 311 and other component parameters, and can be adjusted according to process requirements. During mold closing, the core pushing cam 330 rotates in the reverse direction, and the driving link 311 pulls the mold opening and closing pull rod 313, causing the moving mold 410 to move linearly in opposite directions to close the mold. The magnitude of the mold closing force is determined by the horizontal angle of the driving link 311 and the mechanical properties of each component. The mold closing accuracy is affected by the accuracy of the guide rail 110 and the machining and assembly accuracy of the components, and can reach the micron level.

[0077] Principle of core pushing action: During the mold opening process, when the core pushing cam 330 reaches the mold opening position, the core pushing part of the cam touches the cam plate 331. The force on the cam plate 331 is transmitted to the core pushing plate 336 through the core pushing rod 334, and the core pushing plate 336 ejects the core on the mold base plate 430. The irregular circular shape of the core pushing part of the cam adaptively adjusts the core pushing force distribution according to the core forming condition and the demolding mechanics. When the mold is closed, the core pushing cam 330 is separated from the cam plate 331, and the return spring 333 resets the cam plate 331 to prepare for the next core pushing cycle. When the mechanism works, each component cooperates and acts in sequence. The driving motor 200 cooperates with the control system to intelligently and accurately control each action according to the preset program or sensor feedback, realizing efficient, stable and accurate automation of core making production, improving the core making quality and efficiency, and meeting the development needs of the foundry industry.

[0078] The electric drive of the embodiment of the present invention, which is an integrated mechanism of clamp-type mold clamping and cam core pushing, has significant advantages and can effectively promote the production to move towards high efficiency, intelligence and precision.

[0079] In terms of information management, the electric drive can completely collect and feedback the operation data of the mechanism. When the mold is opened and closed, data such as the motor speed, torque, and the force and displacement of the multi-link component can be monitored and recorded in real time and transmitted to the management system. This helps the operator to master the operation status, predict faults, reduce downtime and improve efficiency. It can also provide a basis for process optimization, enhance the product quality stability and improve the enterprise competitiveness.

[0080] In terms of repair and maintenance, with the help of sensors and communication modules, the operation data can be transmitted to the remote monitoring center in real time. Technicians can remotely diagnose faults based on this, guide on-site repairs or allocate resources, shortening the repair time. The fault prediction model built based on big data can achieve preventive maintenance, reduce operation and maintenance costs, and ensure production continuity.

[0081] In terms of coordination with other components of the core-making machine, the electric drive mechanism has high adaptability. When cooperating with a manipulator, for example, it can precisely control the mold clamping, core pushing and manipulator actions according to the program or sensor feedback, ensuring that the manipulator grabs synchronously at the moment when the core is ejected, avoiding production stagnation and product damage, improving the stability and efficiency of the production rhythm, meeting the automation and intelligent production requirements of the foundry industry, and promoting the enterprise benefit growth.

[0082] The above has made an exemplary description of the present invention in conjunction with the drawings. Obviously, the specific implementation of the present invention is not limited by the above methods. As long as such non-substantial improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A clamp-type mold clamping and cam core integrated mechanism, characterized in that: include: A mold opening and closing unit, the mold opening and closing unit comprising a pair of multi-link assemblies symmetrically arranged on both sides of the top core cam (330), the pair of multi-link assemblies being in a clamp-type structure, and being used to coordinately realize the mold opening and closing action of the movable mold (410); A core ejector unit, the core ejector unit comprising a core ejector cam (330), the core ejector cam (330) having a mold opening position and a mold closing position; When the ejector cam (330) is located at the mold opening position, the ejector cam (330) contacts the ejector assembly and applies an ejection force, thereby causing the sand core to be ejected from the mold, making it easier for humans or machines to grab the sand core; When the ejector cam (330) is located at the mold closing position, the ejector cam (330) is disengaged from the ejector assembly, ensuring that the mold is in a stable closed state, thereby achieving precise switching between sand core ejection and mold closing, and ensuring the orderly progress of the core making process.

2. The clamp-type mold clamping and cam core integrated mechanism according to claim 1, characterized in that: In the mold opening stage, the top core cam (330) rotates to the mold opening position, synchronously drives the double-sided multi-link assembly, converts the rotational force linearly, and then pulls the movable mold (410) to move toward each other along a preset straight line to achieve mold opening; During the mold closing stage, the top core cam (330) is reversed to the mold closing position, synchronously driving the multi-link assembly, and the multi-link assembly cooperates to transmit the contraction force, driving the movable mold (410) to achieve precise alignment along a predetermined straight line.

3. The clamp-type mold clamping and cam core integrated mechanism according to claim 2, characterized in that: The multi-link assembly comprises: A driving connecting rod (311), one end of which is rotatably connected to the top core cam (330) and is used to receive and transmit the rotational power of the top core cam (330); A mold opening and closing pull rod (313), one end of which is firmly connected to the movable mold (410) to transmit power and drive the movable mold (410) to realize the mold opening and closing action, thereby ensuring the accuracy and repeatability of the mold movement; And / or, in the mold closing state, the mold opening and closing pull rod (313) and the driving connecting rod (311) approach a horizontal position in a specific first direction, and cooperate with the rocker arm lever (312) to build a stable force transmission structure, forming a stable triangular mechanical support system, providing a strong, continuous and stable clamping force for the mold, ensuring that the mold is tightly locked.

4. The clamp-type mold clamping and cam core integrated mechanism according to claim 2, characterized in that: The multi-link assembly also includes a rocker lever (312), two ends of which are respectively hinged to the driving link (311) and the mold opening and closing pull rod (313); And / or, the geometric shapes of the driving connecting rod (311), the rocker lever (312) and the mold opening and closing pull rod (313) are not limited to rod-shaped, and may be tubular or plate-shaped structures; Alternatively, it can be customized into curved, wavy, or other regular or irregular shapes according to actual working conditions, and it is only necessary to ensure that the multi-link assembly composed of the driving connecting rod (311), the rocker lever (312), and the mold opening and closing pull rod (313) on both sides can accurately realize the clamp-like opening and closing action and stable force transmission function.

5. The clamp-type mold clamping and cam core integrated mechanism according to claim 4, characterized in that: Both ends of the rocker lever (312) are provided with mounting grooves, and various types of hinged parts are adapted to fit in the mounting grooves; When a rotating shaft is used as a hinged member, an annular sleeve is provided at the hinged end of the driving connecting rod (311) or the mold opening and closing pull rod (313) and the rocker lever (312), and the annular sleeve and the rotating shaft adopt a clearance fit or a high-precision rolling bearing fit mode; Alternatively, a precision hinge hole is designed at the hinged end of the driving connecting rod (311) or the mold opening and closing pull rod (313) and the rocker lever (312), and the hinge hole wall is tightly matched with the rotating shaft; When a sleeve is used as a hinged member, a hinged shaft is provided at the hinged end of the driving connecting rod (311) or the mold opening and closing pull rod (313), and the internal cavity of the sleeve is used to accommodate the hinged shaft.

6. The clamp-type mold clamping and cam core integrated mechanism according to claim 2, characterized in that: The multi-link assembly and the movable mold (410) are firmly connected via an opening and closing template (320), and a guide sleeve seat (321) is provided at the bottom of the opening and closing template (320); The guide sleeve seat (321) is slidably sleeved on the guide rail (110) and slides linearly along the length direction of the guide rail (110) to provide guidance for the opening and closing actions of the movable mold (410).

7. The clamp-type mold clamping and cam core integrated mechanism according to claim 6, characterized in that: The guide rails (110) are a pair and are symmetrically arranged on both sides of the multi-link assembly; A guide groove (322) is provided at the bottom of the guide sleeve seat (321), and two inner side walls of the guide groove (322) are in contact with the outer periphery of the guide rails (110) on both sides; Alternatively, a pair of sliding members are provided at the bottom of the guide sleeve seat (321), and the pair of sliding members match the guide rails (110) on both sides.

8. The clamp-type mold clamping and cam core integrated mechanism according to claim 1, characterized in that: The top core unit also includes: A cam plate (331), one end surface of which is used to contact the top core cam (330) and to receive power transmitted by the top core cam (330), and a top core rod (334) is mounted on the cam plate (331); The core ejector plate (336) is firmly connected to the core ejector rod (334) and is tightly fitted to the mold base plate (430). During the core ejection process, power is transmitted through the core ejector rod (334) to ensure that the sand core is ejected from the mold base plate (430) intactly and without damage.

9. The clamp-type mold clamping and cam core integrated mechanism according to claim 8, characterized in that: The top core unit also includes: a guide plate (335), the guide plate (335) being located between the cam plate (331) and the core pushing plate (336), and being provided with a through hole for the core pushing rod (334) to stably pass through in a straight line direction, thereby providing a stable guiding function for the core pushing action; And / or, the number of the core rods (334) is not limited to one.

10. The clamp-type mold clamping and cam core integrated mechanism according to claim 8, characterized in that: The cam plate (331) is provided with a return spring (333), one end of the return spring (333) is tightly connected to the cam plate (331), and the other end is firmly connected to the guide plate (335); After the mold is closed, at the moment when the core ejection cam (330) and the cam plate (331) are separated, the return spring (333) rapidly releases energy by virtue of its own elastic potential energy, and pulls the cam plate (331) to smoothly return to the initial standby position, so as to prepare for the next core ejection cycle operation; and / or, the number of the return spring (333) is not limited to one; And / or, the return spring (333) is sleeved on the outer circumference of the guide rod (332), and the guide rod (332) is mounted on the cam plate (331).

11. The clamp-type mold clamping and cam core integrated mechanism according to claim 8, characterized in that: The ejector cam (330) has a cam ejector portion, the cam ejector portion is an irregular circular structure, and the cam ejector portion is used to contact the cam plate (331) to eject the sand core.

12. The clamp-type mold clamping and cam core integrated mechanism according to claim 1, characterized in that: Also includes: A driving unit, the driving unit comprising a driving motor (200) and a driving shaft (220), the driving shaft (220) being used to drive the top core cam (330) to achieve eccentric rotation; And / or, the driving motor (200) is a servo motor, a stepping motor or a reduction motor.

13. The clamp-type mold clamping and cam core integrated mechanism according to claim 12, characterized in that: The top core cams (330) are a pair, and the drive shaft (220) is used to connect the pair of top core cams (330) to form an integral structure, namely a cam assembly; And / or, both ends of the cam assembly are rotatably connected to a pair of the multi-link assemblies respectively; And / or, both ends of the cam assembly are provided with hinged parts; When a rotating shaft is used as a hinged member, an annular sleeve is provided at the hinged end of the driving connecting rod (311) and the cam assembly, and the annular sleeve is sleeved on the outer circumference of the rotating shaft; Alternatively, a hinge hole is provided at the hinged end of the driving connecting rod (311) and the cam assembly, and the rotating shaft passes through the hinge hole to realize the hinge connection between the two; When a sleeve is used as a hinged member, the hinged end of the driving connecting rod (311) has a hinged shaft, and the sleeve has a cavity inside for accommodating the hinged shaft.

14. An application of a clamp-type mold clamping and cam core integrated mechanism, characterized in that: It comprises the clamp-type mold clamping and cam core-pushing integrated mechanism as described in any one of claims 1 to 12, and can be used in core making machines, core shooting machines, cold core machines and other core making equipment.

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