Die for preparing pop can cover body

Abstract

The mold comprises a bottom plate and a top plate, a hydraulic rod is fixedly mounted on the upper surface of the top plate, a piston rod of the hydraulic rod penetrates through the top plate and is fixedly mounted on the upper surface of the bottom plate, a connecting column is fixedly mounted on the lower surface of the top plate, and a cylindrical male mold is detachably mounted on the lower surface of the connecting column; a mounting plate is slidably mounted on the upper surface of the bottom plate, an inwards-concave column groove is formed in the upper surface of the mounting plate, a pressing and fixing mechanism is slidably mounted on the lower surface of the top plate, and a demolding mechanism is slidably mounted in the pressing and fixing mechanism. Through the design of the demolding mechanism, the function of demolding can be achieved in the unfolding process after the can cover is stamped, the can cover can be pushed out no matter the can cover adheres to the inner concave column groove or the outer surface of the cylindrical male mold through the automatic demolding mode, demolding can be conducted without additional manual operation, and the demolding efficiency is improved. And the demolding efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of forming moulds, in particular to a mould for preparing a lid of an easy-pull can. Background Art

[0002] Moulds are various molds and tools used in industrial production to obtain the required products by methods such as injection molding, blow molding, extrusion, die-casting or forging, smelting, and stamping. Different moulds are composed of different parts. They mainly realize the processing of the shape of the object by changing the physical state of the molded material. They are known as the "mother of industry". In the processing of some food packaging can lids, they generally need to be punched and formed with the help of moulds.

[0003] For example, the patent with the national authorized patent announcement number CN211464526U discloses a food can lid stamping and heat-sealing integrated mold, a support rod is welded on one side of the base, a hanging plate is welded on the inner side of the top of the support rod, and a first pressing plate is arranged below the hanging plate, a second cylinder and two first cylinders are respectively fixed on the middle and both sides of the hanging plate, and the extended ends of the second cylinder and the first cylinder are fixed on the first pressing plate, a pressing ring is welded at the bottom center of the first pressing plate, a seat ring is fixed on the support rod, and a heating ring is connected to the bottom of the seat ring, and a third cylinder is fixed on the base below the heating ring, and a top plate is fixed on the top of the third cylinder. Beneficial effect: by arranging a gasket on the inner side of the seat ring, high-quality lids can be pressed out without precise alignment, and the requirements for placement accuracy are low. The bottom of the lid is heated by an electric heating ring, and the trademark, label, etc. are squeezed and attached to the lid by a cylinder, and the stamping and heat-sealing processes are combined into one, reducing the number of equipment, financial resources and manpower.

[0004] However, the above-mentioned integrated stamping and heat-sealing mold for food can lids does not have the function of automatically demolding the upper mold and the mold groove after the can lid is stamped, which will cause adhesion between the can lid and the mold, resulting in the lid body remaining in the mold, which will cause discontinuity in the production process and affect the overall production efficiency. Summary of the invention

[0005] The object of the present invention is to provide a mold for preparing a can cover, so as to solve the problem in the above background technology that the can cover cannot be automatically demoulded from the upper mold and the mold groove after the can cover is stamped.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A mold for preparing a can cover, comprising: a bottom plate and a top plate, a hydraulic rod is fixedly installed on the upper surface of the top plate, a piston rod of the hydraulic rod passes through the top plate and is fixedly installed on the upper surface of the bottom plate, a connecting column is fixedly installed on the lower surface of the top plate, a cylindrical punch is detachably installed on the lower surface of the connecting column, a mounting plate is slidably installed on the upper surface of the bottom plate, an inner concave column groove is opened on the upper surface of the mounting plate, the inner concave column groove is an open cylinder shape, the inner concave column groove is flush with the cylindrical punch, so that the cylindrical punch can be driven and pressed into the inner concave column groove by the push of the hydraulic rod, so as to realize pressing the aluminum plate filled in between into a can cover;

[0008] Wherein, a pressing mechanism is slidably mounted on the lower surface of the top plate, and the pressing mechanism can be driven together with the top plate to press vertically downward on the surface of the stamped aluminum plate;

[0009] Among them, a demoulding mechanism is slidably installed in the pressing mechanism, so that the demoulding mechanism can be driven by the pressing mechanism to preferentially fit into the first fitting groove and the second fitting groove, and the first fitting groove and the second fitting groove are respectively arranged on the inner upper surface of the cylindrical punch and the lower surface of the cylindrical punch, so that the demoulding mechanism can be driven to fill the cylindrical punch and the cylindrical punch completely before stamping the aluminum plate, ensuring that the surface of the pressed can cover is smooth, and after the stamping of the can cover is completed, the pressing mechanism can be driven by the top plate to lift up, and it will drive the demoulding mechanism to come out of the first fitting groove and the second fitting groove together, so that the pressed can cover will come out from the inner concave column groove or from the outer surface of the cylindrical punch.

[0010] Preferably, a trapezoidal slide bar is fixed on the upper surface of the bottom plate, and the outer surface of the trapezoidal slide bar can allow the mounting plate to slide in through a trapezoidal slide groove provided on the lower surface.

[0011] Preferably, a butterfly bolt is threadedly installed at one end of the mounting plate, and the threaded portion of the butterfly bolt can be screwed into the trapezoidal slide groove and threadedly installed into the trapezoidal slide bar, so that the screw head of the butterfly bolt can be pressed against one end of the mounting plate.

[0012] Preferably, semi-ring baffles are fixedly mounted on both ends of the upper surface of the mounting plate, and the semi-ring baffles are located on both sides of the periphery of the inner concave column groove.

[0013] Preferably, the pressing mechanism includes four groups of guide rods, which are fixedly mounted at the four corners of the lower surface of the top plate, and pressing plates are slidably mounted on the outer surfaces of the four groups of guide rods. A ring opening is provided on the lower surface of the pressing plate, and the pressing plate is slidably sleeved on the outer surface of the connecting column through the ring opening.

[0014] Preferably, the four groups of guide rods are flush with the four groups of insertion ports, and the four groups of insertion ports are opened at the four corners of the upper surface of the mounting plate, so that when the pressing plate is driven by the top plate to move vertically downward, the guide rods will be driven by the top plate to slide into the insertion ports first so that the pressing plate can be pressed down on the upper surface of the semi-ring baffle.

[0015] Preferably, the outer surfaces of the four groups of guide rods are all equipped with springs, and the upper and lower ends of the springs are respectively fixedly connected to the upper surface of the top plate and the lower surface of the pressing plate, so that the springs can apply an elastic thrust to the pressing plate, so that when the pressing plate is lifted by the top plate, the elastic thrust can push the pressing plate to slide to the lower end of the outer surface of the guide rod.

[0016] Preferably, the demoulding mechanism includes a guide cylinder and a first guide plate, a second guide plate is slidably installed in the guide cylinder, a push column is fixedly installed at one end of the second guide plate, the push column extends to the upper surface of the top plate through the second guide plate and slides through the connecting port to fit into the second fitting groove, the connecting port is opened in the connecting column, and the connecting port is connected to the second fitting groove.

[0017] Preferably, the first guide plate is slidably mounted on one end of the pressing plate, and a push plate is fixedly mounted on one end of the first guide plate, and the push plate can be driven by the push plate to fit into the first fitting groove.

[0018] Preferably, the push column and the push plate can be driven upward by the push plate, and the push column will stop after sliding to the top of the guide tube, and the push plate that continues to be driven to be lifted will slide on the outer surface of the push column, thereby enabling the push column to slide out of the second engagement groove;

[0019] The push plate will be driven by the pressing plate to be lifted and then disengaged from the first fitting groove, so as to realize that the pressed can cover is disengaged from the inner concave column groove or from the outer surface of the cylindrical punch.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. Through the design of the bottom plate, top plate, hydraulic rod, mounting plate, columnar punch, trapezoidal slide, pressing mechanism and demoulding mechanism, when the aluminum plate is stamped into the can cover, the aluminum plate can be placed on the upper surface of the inner concave column groove of the mounting plate, and in the process of filling the aluminum plate, it will be blocked by the semi-ring baffle set on the upper surface of the mounting plate, which can accurately determine the initial position of the aluminum plate, which helps to ensure the position stability of the aluminum plate during the stamping process, thereby improving the accuracy and consistency of the can cover stamping. Then, the hydraulic rod can be started to drive the top plate to move vertically downward, so that the top plate can drive the columnar punch, pressing mechanism and demoulding mechanism on the lower surface of the connecting column. The first and second fitting grooves are driven to fit into the first and second fitting grooves to fill the cylindrical punch and the cylindrical punch completely, which can effectively avoid partial vacancies or unevenness of the cylindrical punch during the stamping process, thereby ensuring a smooth surface of the pressed can cover. The subsequent pressing mechanism will touch the upper surface of the semi-ring baffle to limit the aluminum plate between the mounting plate and the pressing mechanism, which can firmly fix the aluminum plate during the stamping process to prevent the aluminum plate from deflecting or shaking when being pressed by the cylindrical punch. Subsequently, as the top plate is continuously pulled, the cylindrical punch can be driven to press the aluminum plate into the concave The aluminum plate is punched into a can cover between the inner concave column groove and the cylindrical punch, and then the hydraulic rod can be started again to lift the top plate. When the top plate is lifted, it will drive the pressing mechanism and the demoulding mechanism to come out from the upper surface of the inner concave column groove and from the first fitting groove and the second fitting groove in turn, and the demoulding mechanism that comes out from the first fitting groove and the second fitting groove will push out the can cover in the inner concave column groove or on the outer surface of the cylindrical punch, so as to achieve the purpose of demoulding. In addition, this automatic demoulding method allows the can cover to be pushed out whether it is in the inner concave column groove or on the outer surface of the cylindrical punch, and no additional manual operation is required. The demoulding is carried out in a simple manner, which improves the demoulding efficiency and shortens the entire production cycle. When it is necessary to stamp can covers of different sizes, the staff can unscrew the threaded part from the trapezoidal slide by twisting the butterfly bolt to release the top pressure on the mounting plate. The staff can then slide the mounting plate out from the outer surface of the trapezoidal slide and slide the required mounting plate to install it. The cylindrical punch can be disassembled and assembled on the lower surface of the connecting column through the hexagon socket, so that the mold can quickly adapt to the stamping needs of can covers of different sizes, improve the versatility and flexibility of the mold, and reduce the cost of enterprises to equip a variety of large molds due to different can cover sizes.

[0022] 2. Through the design of the guide rod, spring, clamping plate, push column and push plate, when the top plate is pulled down by the hydraulic rod, it will drive the clamping plate, push column and push plate to move downward together. When the clamping plate is driven to move vertically downward by the top plate, the guide rod will be driven by the top plate to slide into the insertion port first for the clamping plate to press down on the upper surface of the semi-ring baffle to limit the aluminum plate between the mounting plate and the clamping plate. The aluminum plate can be firmly fixed during the stamping process to prevent the aluminum plate from deflecting or shaking when it is pressed by the cylindrical punch. At the same time, the top plate will also drive the push column and push plate together. The push plate fits into the second fitting groove and the first fitting groove to fill the cylindrical punch and the cylindrical punch completely, which can effectively avoid the cylindrical punch from being partially empty or uneven during the stamping process. Subsequently, as the top plate is continuously pulled, the cylindrical punch can be driven to press the aluminum plate into the inner concave column groove, so that the aluminum plate is stamped into a can cover between the inner concave column groove and the cylindrical punch. In the process of the top plate being continuously driven down, the guide rod will also be driven to slide into the insertion port, so that the pressing plate can slide on the outer surface of the guide rod, and at the same time, the pressing plate can press the sleeve One end of the spring installed on the outer surface of the guide rod can enable the spring to apply an elastic thrust to the holding plate, and then the hydraulic rod can be started again to lift the top plate. When the top plate is lifted, the guide rod, the push column and the push plate will be lifted in turn, and the guide rod will be pulled out of the insertion port, and at the same time, the holding plate will be pushed by the spring on the outer surface of the guide rod to slide down to its original position. When the push column and the push plate are lifted by the top plate, the push column will be driven to slide up in the guide cylinder until it slides to the inner top of the guide cylinder and stops, and the said The push plate will slide on the outer surface of the push column, so that the push column can slide out of the second fitting groove, and the push plate will be driven by the pressing plate to lift it out of the first fitting groove, so as to realize the ejection of the pressed can cover from the inner concave column groove or from the outer surface of the cylindrical punch. In the demoulding process, each component has a clear action and sequence, and there will be no mutual interference or jamming between the components. The orderly demoulding can maintain the integrity of the can cover, avoid scratches, deformation and other problems, thereby improving the qualified rate of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the mold for preparing the lid of an easy-pull can according to the present invention;

[0024] Figure 2 It is a structural schematic diagram of the bottom plate and the top plate of the present invention;

[0025] Figure 3 It is a structural schematic diagram of the inner concave column groove and the cylindrical punch of the present invention;

[0026] Figure 4 It is a schematic structural diagram of the second guide plate and the push column of the present invention;

[0027] Figure 5 It is a structural schematic diagram of the first engaging groove and the guide cylinder of the present invention;

[0028] Figure 6 It is a schematic structural diagram of the first guide plate and the push plate of the present invention;

[0029] Figure 7 It is a schematic structural diagram of the pressing plate of the present invention.

[0030] In the figure: 1. bottom plate; 101. mounting plate; 102. inner concave column groove; 103. first fitting groove; 104. trapezoidal slide groove; 105. trapezoidal slide bar; 106. semi-ring baffle; 107. butterfly bolt; 108. insertion port; 2. top plate; 201. hydraulic rod; 202. connecting column; 203. cylindrical punch; 204. connecting port; 205. second fitting groove; 3. pressing mechanism; 301. guide rod; 302. spring; 303. pressing plate; 304. ring mouth; 4. demoulding mechanism; 401. guide cylinder; 402. second guide plate; 403. push column; 404. first guide plate; 405. push plate. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figure 1-Figure 7 , this embodiment provides the following technical solutions:

[0033] like Figure 1-Figure 3 As shown, a mold for preparing a can cover body comprises: a bottom plate 1 and a top plate 2, a hydraulic rod 201 is fixedly installed on the upper surface of the top plate 2, the piston rod of the hydraulic rod 201 passes through the top plate 2 and is fixedly installed on the upper surface of the bottom plate 1, a connecting column 202 is fixedly installed on the lower surface of the top plate 2, a cylindrical punch 203 is detachably installed on the lower surface of the connecting column 202, a mounting plate 101 is slidably installed on the upper surface of the bottom plate 1, an inner concave column groove 102 is opened on the upper surface of the mounting plate 101, the inner concave column groove 102 is an open cylindrical shape, and the inner concave column groove 102 is flush with the cylindrical punch 203, so that the cylindrical punch 203 can be driven and pressed into the inner concave column groove 102 by the push of the hydraulic rod 201, so as to realize the pressing of the aluminum plate filled in between into a can cover;

[0034] The lower surface of the top plate 2 is slidably mounted with a pressing mechanism 3, which can be driven together with the top plate 2 to press vertically downward on the surface of the stamped aluminum plate;

[0035] Among them, a demoulding mechanism 4 is slidably installed in the pressing mechanism 3, so that the demoulding mechanism 4 can be driven by the pressing mechanism 3 to preferentially fit into the first fitting groove 103 and the second fitting groove 205. The first fitting groove 103 and the second fitting groove 205 are respectively arranged on the upper surface of the cylindrical punch 203 and the lower surface of the cylindrical punch 203, so that the demoulding mechanism 4 can be driven to fill the cylindrical punch 203 and the cylindrical punch 203 completely before stamping the aluminum plate, ensuring that the surface of the pressed can cover is smooth. After the stamping of the can cover is completed, the pressing mechanism 3 can be driven by the top plate 2 to lift up, and it will drive the demoulding mechanism 4 to come out of the first fitting groove 103 and the second fitting groove 205 together to remove the pressed can cover from the inner concave column groove 102 or from the outer surface of the cylindrical punch 203.

[0036] The upper surface of the bottom plate 1 is fixed with a trapezoidal slide bar 105 , and the outer surface of the trapezoidal slide bar 105 can be slidably inserted by the mounting plate 101 through a trapezoidal slide groove 104 provided on the lower surface.

[0037] A butterfly bolt 107 is threadedly installed at one end of the mounting plate 101 . The threaded portion of the butterfly bolt 107 can be screwed into the trapezoidal slide groove 104 and threadedly installed into the trapezoidal slide bar 105 , so that the screw head of the butterfly bolt 107 can press against one end of the mounting plate 101 .

[0038] Semi-ring baffles 106 are fixedly mounted on both ends of the upper surface of the mounting plate 101 , and the semi-ring baffles 106 are located on both sides of the periphery of the inner concave column groove 102 .

[0039] Through the design of the bottom plate 1, the top plate 2, the hydraulic rod 201, the mounting plate 101, the cylindrical punch 203, the trapezoidal slide 105, the pressing mechanism 3 and the demoulding mechanism 4, when the aluminum plate is stamped into a can cover, the aluminum plate can be placed on the upper surface of the concave column groove 102 of the mounting plate 101, and in the process of filling the aluminum plate, it will be blocked by the semi-ring baffle 106 set on the upper surface of the mounting plate 101, so that the initial position of the aluminum plate can be accurately determined, which helps to ensure the position stability of the aluminum plate during the stamping process, thereby improving the accuracy and consistency of the can cover stamping, and then the hydraulic rod 201 can be started to drive the top plate 2 to move vertically downward, so that the top plate 2 can drive the cylindrical punch 203, the pressing mechanism 3 and the demoulding mechanism 4 on the lower surface of the connecting column 202 The mold mechanism 4 moves downward together, and the demoulding mechanism 4 will be driven to fit into the first fitting groove 103 and the second fitting groove 205 first, so as to fill the cylindrical punch 203 and the cylindrical punch 203 completely, which can effectively avoid the cylindrical punch 203 from being partially empty or uneven during the stamping process, thereby ensuring that the surface of the pressed can cover is smooth. The subsequent pressing mechanism 3 will touch the upper surface of the semi-ring baffle 106 to limit the aluminum plate between the mounting plate 101 and the pressing mechanism 3, which can firmly fix the aluminum plate during the stamping process to prevent the aluminum plate from deflecting or shaking when being pressed by the cylindrical punch 203. Then, as the top plate 2 is continuously pulled, the cylindrical punch 203 can be driven to press the aluminum plate into the inner The aluminum plate is punched into a can cover between the inner concave column groove 102 and the cylindrical punch 203, and then the hydraulic rod 201 can be started again to lift the top plate 2. When the top plate 2 is lifted, it will drive the pressing mechanism 3 and the demoulding mechanism 4 to come out from the upper surface of the inner concave column groove 102 and from the first fitting groove 103 and the second fitting groove 205 in turn. The demoulding mechanism 4 that comes out from the first fitting groove 103 and the second fitting groove 205 will push out the can cover in the inner concave column groove 102 or on the outer surface of the cylindrical punch 203, so as to achieve the purpose of demoulding. In addition, this automatic demoulding method allows the can cover to be pushed out whether it is in the inner concave column groove 102 or on the outer surface of the cylindrical punch 203, without the need for No additional manual operation is required for demoulding, which improves the efficiency of demoulding and shortens the entire production cycle. When it is necessary to stamp can lids of different sizes, the staff can unscrew the threaded portion from the trapezoidal slide 105 by twisting the butterfly bolt 107, thereby releasing the top pressure on the mounting plate 101. The staff can then slide the mounting plate 101 out of the outer surface of the trapezoidal slide 105 and slide the required mounting plate 101 to install it. The cylindrical punch 203 can be disassembled and assembled on the lower surface of the connecting column 202 through the hexagon socket, so that the mold can quickly adapt to the stamping needs of can lids of different sizes, improve the versatility and flexibility of the mold, and reduce the cost of the company to equip a variety of large molds due to different can lid sizes.

[0040] like Figure 4-Figure 7As shown, the pressing mechanism 3 includes four groups of guide rods 301, which are fixedly installed at the four corners of the lower surface of the top plate 2. A pressing plate 303 is slidably installed on the outer surface of the four groups of guide rods 301. A ring opening 304 is opened on the lower surface of the pressing plate 303, and the pressing plate 303 slides onto the outer surface of the connecting column 202 through the ring opening 304.

[0041] The four groups of guide rods 301 are flush with the four groups of insertion ports 108, and the four groups of insertion ports 108 are opened at the four corners of the upper surface of the mounting plate 101. When the pressing plate 303 is driven by the top plate 2 to move vertically downward, the guide rods 301 will be driven by the top plate 2 to slide into the insertion ports 108 first, so that the pressing plate 303 can be pressed down on the upper surface of the semi-ring baffle 106.

[0042] The outer surfaces of the four groups of guide rods 301 are all equipped with springs 302, and the upper and lower ends of the springs 302 are respectively fixedly connected to the upper surface of the top plate 2 and the lower surface of the pressing plate 303, so that the springs 302 can apply an elastic thrust to the pressing plate 303, so that when the pressing plate 303 is lifted by the top plate 2, the pressing plate 303 can be pushed and slid to the lower end of the outer surface of the guide rod 301 through the elastic thrust.

[0043] The demoulding mechanism 4 includes a guide cylinder 401 and a first guide plate 404. A second guide plate 402 is slidably installed in the guide cylinder 401. A push column 403 is fixedly installed at one end of the second guide plate 402. The push column 403 extends to the upper surface of the top plate 2 through the second guide plate 402 and slides through the connecting port 204 to fit into the second fitting groove 205. The connecting port 204 is opened in the connecting column 202, and the connecting port 204 is connected to the second fitting groove 205.

[0044] The first guide plate 404 is slidably mounted on one end of the pressing plate 303 , and a push plate 405 is fixedly mounted on one end of the first guide plate 404 . The push plate 405 can be driven by the top plate 2 to fit into the first fitting groove 103 .

[0045] The push column 403 and the push plate 405 can be driven upward by the push plate 2, and the push column 403 will stop after sliding to the top of the guide cylinder 401, and the push plate 2 that continues to be driven and lifted will slide on the outer surface of the push column 403, thereby enabling the push column 403 to slip out of the second engagement groove 205;

[0046] The push plate 405 will be driven by the pressing plate 303 to be lifted and then disengaged from the first engaging groove 103 , so as to realize that the pressed can cover is disengaged from the inner concave column groove 102 or from the outer surface of the cylindrical punch 203 .

[0047] Through the design of the guide rod 301, spring 302, holding plate 303, pushing column 403 and pushing plate 405, when the top plate 2 is pulled down by the hydraulic rod 201, the holding plate 303, pushing column 403 and pushing plate 405 will be driven to move downward together, and when the holding plate 303 is driven to move vertically downward by the top plate 2, the guide rod 301 will be driven by the top plate 2 to slide into the insertion port 108 first, so that the holding plate 303 is pressed down on the upper surface of the semi-ring baffle 106, so as to limit the aluminum plate between the mounting plate 101 and the holding plate 303, so as to firmly fix the aluminum plate during the stamping process, and prevent the aluminum plate from deflecting or shaking when being pressed by the cylindrical punch 203, and at the same time, the top plate 2 will also At the same time, the push column 403 and the push plate 405 are driven to fit into the second fitting groove 205 and the first fitting groove 103 to fill the cylindrical punch 203 and the cylindrical punch 203 completely, which can effectively avoid the cylindrical punch 203 from being partially empty or uneven during the stamping process. Subsequently, as the top plate 2 is continuously pulled, the cylindrical punch 203 can be driven to press the aluminum plate into the inner concave column groove 102, so that the aluminum plate is stamped into a can cover between the inner concave column groove 102 and the cylindrical punch 203. In the process of the top plate 2 being continuously driven downward, the guide rod 301 will also be driven to slide into the insertion port 108, so that the pressing plate 303 can slide on the outer surface of the guide rod 301. , and at the same time, the pressing plate 303 is pressed against one end of the spring 302 sleeved on the outer surface of the guide rod 301, so that the spring 302 can apply an elastic thrust to the pressing plate 303, and then the hydraulic rod 201 can be started again to lift the top plate 2, and when the top plate 2 is lifted, it will drive the guide rod 301, the pushing column 403 and the pushing plate 405 to be lifted in turn, and the guide rod 301 will be pulled out of the insertion port 108, and at the same time, the pressing plate 303 is pushed by the spring 302 to slide down the outer surface of the guide rod 301 to its original position, and when the pushing column 403 and the pushing plate 405 are lifted by the top plate 2, the pushing column 403 will be driven to slide up in the guide cylinder 401 until it slides to the guide cylinder 401. After reaching the inner top of the cylinder 401, it will stop, and the top plate 2 that continues to be driven and lifted will slide on the outer surface of the pushing column 403, so that the pushing column 403 can slide out of the second fitting groove 205, and the pushing plate 405 will be driven and lifted by the pressing plate 303 to get out of the first fitting groove 103, so as to realize the removal of the pressed can cover from the inner concave column groove 102 or from the outer surface of the cylindrical punch 203, and each component has a clear action and sequence in the demoulding process, and there will be no mutual interference or jamming between the components, and the orderly demoulding can maintain the integrity of the can cover, avoid scratches, deformation and other problems, thereby improving the qualified rate of the product.

[0048] In this embodiment, the spring compression equation is introduced:

[0049] During the compression process of a spring, the relationship between its compression amount x, the force F and the spring constant k can be expressed by Hooke's law: F = kx;

[0050] In the mold of this embodiment, when the pressing plate 303 is pressed down, the spring 302 will be compressed, generating a reaction force to fix the aluminum plate. It can be assumed that at the maximum compression, the compression amount of the spring is x max At this time, the force is the maximum force Fmax required to fix the aluminum plate.

[0051] What the push pin 403 needs to overcome during the demoulding process is the adhesion force between the can cover and the mold. It can be simplified by assuming that this adhesion force is proportional to the surface area A of the can cover and the adhesion strength per unit area σ. Then the demoulding force equation of the push pin is as follows:

[0052] Fadhesion = A·σ;

[0053] The force Feject that the ejector pin 403 needs to apply must be greater than or equal to the adhesion force for successful demoulding.

[0054] Here is an example:

[0055] Spring compression example:

[0056] Assuming the spring constant k = 1000 N / m and the maximum required fixing force Fmax = 500 N, the maximum compression of the spring is:

[0057] x max =Fmax / k=500N / 1000N / m=0.5m;

[0058] It should be noted that the 0.5m here is a very large value and is only used for example. In actual applications, the compression of the spring is usually much smaller than this value.

[0059] Example of ejector pin ejection force:

[0060] Assume that the surface area of ​​the tank cover is A = 0.01m 2 , adhesion strength per unit area σ=50N / m 2 , then the ejection force that the ejector pin needs to apply is:

[0061] Feject=A·σ=0.01m 2 50N / m 2 =0.5N;

[0062] Again, the values ​​here are simplified for the sake of illustration. In actual applications, the demolding force may be affected by many factors, such as mold material, lubrication conditions, etc.

[0063] The spring compression equation is used to control the spring compression by adjusting the spring constant and the maximum required fixing force. The ejector pin demoulding force equation reveals the relationship between the adhesion force that needs to be overcome during demoulding and the surface area of ​​the can cover and the adhesion strength per unit area, which helps to design a suitable ejector mechanism to ensure successful demoulding.

[0064] According to the above technical scheme, the working steps of this scheme are summarized and sorted out: when the aluminum plate is stamped into a can cover, the aluminum plate can be placed on the upper surface of the inner concave column groove 102 of the mounting plate 101, and in the process of filling the aluminum plate, it will be blocked by the semi-ring baffle 106 set on the upper surface of the mounting plate 101, which can accurately determine the initial position of the aluminum plate, and then the hydraulic rod 201 can be started to drive the top plate 2 to move vertically downward, so that the top plate 2 can drive the cylindrical punch 203, the pressing plate 303, the pushing column 403 and the pushing plate 405 on the lower surface of the connecting column 202 to move downward, and when the pressing plate 303 is driven by the top plate 2 to move vertically downward, the guide rod 301 will be driven by the top plate 2 to slide into the insertion port 108 first. The pressing plate 303 is pressed down on the upper surface of the semi-ring baffle 106 to limit the aluminum plate between the mounting plate 101 and the pressing plate 303, and the aluminum plate can be firmly fixed during the stamping process to prevent the aluminum plate from deflecting or shaking when the cylindrical punch 203 is pressed. At the same time, the top plate 2 will also drive the pushing column 403 and the pushing plate 405 to fit into the second fitting groove 205 and the first fitting groove 103 to fill the cylindrical punch 203 and the cylindrical punch 203 completely, which can effectively avoid the cylindrical punch 203 from being partially empty or uneven during the stamping process. Subsequently, as the top plate 2 is continuously pulled, the cylindrical punch 203 can be driven to press the aluminum plate into the inner concave column groove 10 2, so that the aluminum plate is punched into a can cover between the inner concave column groove 102 and the cylindrical punch 203, and the top plate 2 is continuously driven downward and pressed, and the guide rod 301 is also driven to slide into the insertion port 108, so that the pressing plate 303 can slide on the outer surface of the guide rod 301, and at the same time, the pressing plate 303 presses one end of the spring 302 sleeved on the outer surface of the guide rod 301, so that the spring 302 can apply a spring thrust to the pressing plate 303, and then the hydraulic rod 201 can be started again to lift the top plate 2, and when the top plate 2 is lifted, the guide rod 301, the push column 403 and the push plate 405 are lifted in turn, and the guide rod 301 is pulled out from the insertion port 108. The top plate 202 is driven to lift the top plate 203 and the top plate 205, and the top plate 203 is pulled out, and at the same time, the pressing plate 303 is pushed by the spring 302 to slide down the outer surface of the guide rod 301 to its original position. When the pushing column 403 and the pushing plate 405 are lifted by the top plate 2, the pushing column 403 will be driven to slide up in the guide cylinder 401 until it slides to the inner top of the guide cylinder 401 and stops. The top plate 2 that continues to be lifted will slide on the outer surface of the pushing column 403, so that the pushing column 403 can slide out of the second fitting groove 205, and the pushing plate 405 will be lifted by the pressing plate 303 and be pulled out of the first fitting groove 103, so as to realize that the pressed can cover is pulled out from the inner concave column groove 102 or from the outer surface of the cylindrical punch 203.

[0065] In summary: the mold for preparing the can cover has the function of demolding the can cover simultaneously during the unfolding process after the can cover is stamped, and this automatic demolding method allows the can cover to be pushed out regardless of whether it is adhered to the inner concave column groove 102 or the outer surface of the cylindrical punch 203, without the need for additional manual operation for demolding, thereby improving the demolding efficiency.

[0066] Parts not involved in the present invention are the same as the prior art or can be implemented by the prior art. Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mold for preparing a can lid, characterized in that: include: A bottom plate (1) and a top plate (2), wherein a hydraulic rod (201) is fixedly mounted on the upper surface of the top plate (2), and a piston rod of the hydraulic rod (201) passes through the top plate (2) and is fixedly mounted on the upper surface of the bottom plate (1); a connecting column (202) is fixedly mounted on the lower surface of the top plate (2), and a columnar convex mold (203) is detachably mounted on the lower surface of the connecting column (202); a mounting plate (101) is slidably mounted on the upper surface of the bottom plate (1), and an inner concave column groove (102) is provided on the upper surface of the mounting plate (101), wherein the inner concave column groove (102) is in the shape of an open cylinder, and the inner concave column groove (102) is flush with the columnar convex mold (203), so that the columnar convex mold (203) can be driven and pressed into the inner concave column groove (102) by the pushing of the hydraulic rod (201), thereby realizing the pressing of the aluminum plate filled therebetween into a can cover.

2. A mold for preparing a can lid according to claim 1, characterized in that: A pressing mechanism (3) is slidably mounted on the lower surface of the top plate (2), and the pressing mechanism (3) can be driven together with the top plate (2) to press vertically downward on the surface of the stamped aluminum plate; A demoulding mechanism (4) is slidably installed in the pressing mechanism (3), so that the demoulding mechanism (4) can be driven by the pressing mechanism (3) to preferentially fit into the first fitting groove (103) and the second fitting groove (205), wherein the first fitting groove (103) and the second fitting groove (205) are respectively arranged on the inner upper surface of the columnar punch (203) and the lower surface of the columnar punch (203), so that the demoulding mechanism (4) can be driven to completely fill the columnar punch (203) and the columnar punch (203) before stamping the aluminum plate, so as to ensure that the surface of the pressed can cover is smooth; and after the stamping of the can cover is completed, when the pressing mechanism (3) is driven by the top plate (2) to be lifted up, the demoulding mechanism (4) will be driven to come out of the first fitting groove (103) and the second fitting groove (205), so that the pressed can cover comes out from the inner concave column groove (102) or from the outer surface of the columnar punch (203); The upper surface of the bottom plate (1) is fixed with a trapezoidal slide bar (105), and the outer surface of the trapezoidal slide bar (105) can be used for the mounting plate (101) to slide in through a trapezoidal slide groove (104) provided on the lower surface.

3. A mold for preparing a can lid according to claim 2, characterized in that: A butterfly bolt (107) is threadedly mounted on one end of the mounting plate (101), and the threaded portion of the butterfly bolt (107) can be screwed into the trapezoidal slide groove (104) and threadedly mounted into the trapezoidal slide bar (105), so that the screw head of the butterfly bolt (107) can be pressed against one end of the mounting plate (101).

4. A mold for preparing a can lid according to claim 3, characterized in that: Semi-ring baffles (106) are fixedly mounted at both ends of the upper surface of the mounting plate (101), and the semi-ring baffles (106) are located on both sides of the periphery of the inner concave column groove (102).

5. A mold for preparing a can lid according to claim 4, characterized in that: The pressing mechanism (3) comprises four groups of guide rods (301), the four groups of guide rods (301) are fixedly mounted at four corners of the lower surface of the top plate (2), and a pressing plate (303) is slidably mounted on the outer surface of the four groups of guide rods (301), and a ring opening (304) is provided on the lower surface of the pressing plate (303), and the pressing plate (303) is slidably sleeved on the outer surface of the connecting column (202) through the ring opening (304).

6. A mold for preparing a can lid according to claim 5, characterized in that: The four groups of guide rods (301) are flush with the four groups of insertion openings (108), and the four groups of insertion openings (108) are opened at the four corners of the upper surface of the mounting plate (101), so that when the pressing plate (303) is driven by the top plate (2) to move vertically downward, the guide rods (301) are driven by the top plate (2) to slide into the insertion openings (108) first, so that the pressing plate (303) is pressed down on the upper surface of the semi-ring baffle (106).

7. A mold for preparing a can lid according to claim 6, characterized in that: The outer surfaces of the four groups of guide rods (301) are all provided with springs (302), and the upper and lower ends of the springs (302) are respectively fixedly connected to the upper surface of the top plate (2) and the lower surface of the pressing plate (303), so that the springs (302) can exert an elastic thrust on the pressing plate (303), so that when the pressing plate (303) is lifted by the top plate (2), the pressing plate (303) can be pushed and slid to the lower end of the outer surface of the guide rod (301) by the elastic thrust.

8. The mold for preparing a can lid according to claim 7, characterized in that: The demoulding mechanism (4) comprises a guide cylinder (401) and a first guide plate (404); a second guide plate (402) is slidably mounted in the guide cylinder (401); a push column (403) is fixedly mounted at one end of the second guide plate (402); the push column (403) extends through the second guide plate (402) to the upper surface of the top plate (2) and slides through the connecting port (204) to fit into the second fitting groove (205); the connecting port (204) is opened in the connecting column (202), and the connecting port (204) is connected to the second fitting groove (205).

9. A mold for preparing a can lid according to claim 8, characterized in that: The first guide plate (404) is slidably mounted on one end of the pressing plate (303), and a push plate (405) is fixedly mounted on one end of the first guide plate (404). The push plate (405) can be driven by the top plate (2) to fit into the first fitting groove (103).

10. A mold for preparing a can lid according to claim 9, characterized in that: The push column (403) and the push plate (405) can be driven upward by the top plate (2), and the push column (403) will stop after sliding to the top of the guide tube (401), and the push plate (2) that continues to be driven to be lifted will slide on the outer surface of the push column (403), thereby enabling the push column (403) to slide out of the second fitting groove (205); The push plate (405) will be driven and lifted by the pressing plate (303) to disengage from the first fitting groove (103), so as to enable the pressed can cover to be disengaged from the inner concave column groove (102) or from the outer surface of the cylindrical punch (203).

Images