A mould for surface inverting a coffee pot shell

Abstract

The application discloses a mould for demoulding of a coffee pot shell surface reverse buckle, comprising: an upper plate and a lower plate, the lower plate is arranged below the upper plate; oil cylinders are fixedly installed at the opposite corners of the two sides of the upper plate, the oil cylinders are arranged upside down, the output end of the oil cylinder extends downward and is fixedly installed with an adjusting assembly, the lower plate is provided with a clamping groove at the opposite corners corresponding to the oil cylinders, the oil cylinders are used for cooperating with the clamping groove through the adjusting assembly, and the lower plate is pulled to move upward after the mould is opened to perform product ejection; an installation plate is fixedly installed at the bottom of the inner wall of the lower plate, the upper surface of the installation plate is provided with a connecting plate, and the top of the connecting plate is fixedly installed with a fixed plate; a linkage assembly is arranged between the upper plate and the lower plate and is used for driving the connecting plate, the fixed plate and a sleeve shell to move upward when the lower plate is pulled; an ejection assembly is installed in the sleeve shell and is used for pushing the reverse buckle of the inner circumferential surface of the shell to demould the shell. The application solves the problem that the inner reverse buckle of the shell is difficult to demould.

Description

Technical Field

[0001] This invention relates to the field of injection mold technology, and in particular to a mold for demolding the surface of a coffee pot shell by inverting. Background Technology

[0002] In the production of everyday utensils such as coffee pots, the outer shell is often injection molded. To meet assembly or functional requirements, an undercut structure is often set on the inner circumference of the pot shell. Due to the presence of the undercut, the product cannot be directly ejected along the mold opening direction during the mold opening process. If a forced ejection method is used, it is very easy to cause the undercut part to be strained, deformed, or even broken, affecting the product yield.

[0003] Current methods often employ side-pulling mechanisms such as angled ejectors and sliders. However, these structures increase mold complexity and manufacturing costs. Furthermore, for kettle shells with multiple internal undercuts or narrow spaces, arranging the core-pulling mechanism is difficult, and the demolding cycle is relatively long. Alternatively, manual part removal can be used, but this is inefficient and difficult to adapt to automated production.

[0004] Therefore, a mold structure is needed that can easily and efficiently achieve the inverted demolding of the coffee pot shell. Summary of the Invention

[0005] The purpose of this invention is to provide a mold for demolding the inverted surface of a coffee pot shell, so as to solve the problems of existing molds that are difficult to demold the inverted surface of the pot shell, have complex structures, and have low production efficiency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a mold for demolding a coffee pot shell surface by inverting, comprising: an upper plate and a lower plate, wherein the lower plate is disposed below the upper plate;

[0007] Hydraulic cylinders are fixedly installed at the diagonal corners on both sides of the upper plate. The hydraulic cylinders are inverted and the output end of the hydraulic cylinders extends downward and is fixedly installed with adjustment components. The lower plate has a snap-fit ​​groove at the diagonal corner corresponding to the hydraulic cylinder. The hydraulic cylinders are used to pull the lower plate upward after the mold is opened by cooperating with the adjustment components and snap-fit ​​grooves to eject the product.

[0008] An installation plate is fixedly installed on the bottom inner wall of the lower plate. A connecting plate is provided on the upper surface of the installation plate. A fixing plate is fixedly installed on the top of the connecting plate. Sliding grooves are opened on both sides of the installation plate.

[0009] A linkage assembly is provided between the upper plate and the lower plate. The linkage assembly is used to generate a phased relative axial displacement between the connecting plate, the fixed plate, and the sleeve and the lower plate during the process of the lower plate being pulled upward by the hydraulic cylinder, so as to realize the demolding action of first pulling the core and then withdrawing.

[0010] The inner circumferential surface of the fixed plate is provided with a sleeve, and an ejector assembly is installed inside the sleeve. The ejector assembly is used to push the inverted buckle on the inner circumferential surface of the kettle shell during demolding, so that the kettle shell is demolded.

[0011] As a further description of the above technical solution:

[0012] The adjustment assembly includes a linkage block and a snap-fit ​​block disposed on one side of the linkage block. The linkage block is fixedly connected to the output end of the hydraulic cylinder, and the snap-fit ​​block is detachably snap-fitted into the snap-fit ​​groove.

[0013] As a further description of the above technical solution:

[0014] The linkage assembly includes hooks symmetrically arranged on the lower surface of the upper plate and limiting plates arranged on the outer walls of both sides of the fixed plate, as well as buckles arranged on the outer walls of both sides of the connecting plate. When the lower plate is pulled upward by the hydraulic cylinder, the lower plate drives the connecting plate, the fixed plate and the housing to move upward together, and the segmented movement is achieved through the cooperation of the buckles and hooks.

[0015] As a further description of the above technical solution:

[0016] The slot on the mounting plate allows the fastener to pass through and move.

[0017] As a further description of the above technical solution:

[0018] The limiting plate is a concave plate, with a groove formed between its two side walls, and the top of the groove forms a limiting point that restricts the travel of the fastener.

[0019] As a further description of the above technical solution:

[0020] The ejection assembly includes a core insert and a top block. The core insert is fixed to the connecting plate. The outer circumferential surface of the core insert has a beveled structure. The inner wall of the housing has a radial guide groove. A molded part with a forming undercut is slidably installed in the guide groove. The molded part has a passive bevel that matches the beveled structure of the core insert. The top block is installed on the top of the core insert. The top block is used to push the undercut on the inner circumferential surface of the housing during demolding, so that the housing can be demolded.

[0021] As a further description of the above technical solution:

[0022] The molded inverted parts are arranged at intervals along the center of the inner circumference of the kettle shell.

[0023] As a further description of the above technical solution:

[0024] Both the top plate and the fixed plate are provided with a central through hole.

[0025] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0026] 1. In this invention, by inverting the hydraulic cylinders at the diagonal corners of the upper plate, the piston rods of the hydraulic cylinders retract after the mold opens. Through the cooperation of the adjusting component and the locking groove of the lower plate, the lower plate is directly pulled upward to eject the product. The hydraulic cylinders serve both as locking mechanisms during mold closing and as the power source for ejection. One set of hydraulic cylinders achieves dual functions, simplifying the overall structure of the mold.

[0027] 2. In this invention, during the initial stage when the lower plate is pulled by the hydraulic cylinder, the lower plate drives the connecting plate, the fixing plate, and the casing to move synchronously. During this synchronous movement, the inclined structure on the insert drives the molded part to slide outward along the radial guide groove of the casing, so that the molded part smoothly exits the undercut on the inner circumference of the casing, preparing for subsequent demolding and solving the problem of the undercut hindering demolding.

[0028] 3. In this invention, when the synchronous movement reaches the preset stroke, the latching mechanism touches the pressure slope at the top of the limiting plate, causing the latching mechanism to rotate under force. Its lower end releases the lock on the fixed plate, and its upper end disengages from the hook, stopping the movement of the connecting plate and its ejection assembly. At this time, the lower plate, under the continued pull of the hydraulic cylinder, drives the fixed plate and the sleeve to continue moving upwards, causing relative movement between the product and the stopped ejector block. The product is ejected from the sleeve cavity by the ejector block, completing the secondary demolding. This two-step action of first unfastening and then ejecting is entirely driven by the hydraulic cylinder and mechanically linked, with a clear and reliable sequence of actions, completely solving the problem of difficult demolding of the inverted latch inside the mold shell. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of a mold used for demolding the outer surface of a coffee pot.

[0031] Figure 2 This is a schematic diagram of a mold cylinder for demolding a coffee pot shell by inverting it.

[0032] Figure 3 This is a cross-sectional view of a mold hook used for demolding an inverted mold on the surface of a coffee pot shell.

[0033] Figure 4 This is a cross-sectional view of a mold mounting plate for demolding a coffee pot shell.

[0034] Figure 5 This is a schematic diagram of a mold limiting plate for demolding an inverted coffee pot shell.

[0035] Figure 6 This is a schematic diagram of a mold locking groove for demolding an inverted coffee pot shell.

[0036] Figure 7 This is a cross-sectional view of a mold insert for demolding a coffee pot shell by inverting it.

[0037] Figure 8 This is a cross-sectional view of a mold used for demolding the surface of a coffee pot.

[0038] Legend:

[0039] 1. Upper plate; 2. Lower plate; 3. Hydraulic cylinder; 4. Adjustment component; 401. Linkage block; 402. Snap-fit ​​block; 5. Snap-fit ​​groove; 6. Mounting plate; 7. Connecting plate; 8. Fixing plate; 9. Slide groove; 10. Linkage component; 1001. Hook; 1002. Limiting plate; 1003. Buckle; 11. Housing; 12. Ejection component; 1201. Core insert; 1202. Top block; 13. Pot shell; 14. Inverted buckle. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Example 1

[0042] Please see Figure 1-8 The present invention provides a technical solution: a mold for demolding the inverted 14 on the surface of a coffee pot shell, comprising: an upper plate 1 and a lower plate 2, wherein the lower plate 2 is disposed below the upper plate 1;

[0043] The upper plate 1 has oil cylinders 3 fixedly installed at the diagonal corners on both sides. The oil cylinders 3 are inverted and their output ends extend downward and are fixedly installed with adjustment components 4. The lower plate 2 has snap-fit ​​grooves 5 at the diagonal corners corresponding to the oil cylinders 3.

[0044] A mounting plate 6 is fixedly installed on the bottom of the inner wall of the lower plate 2. A connecting plate 7 is provided on the upper surface of the mounting plate 6. A fixing plate 8 is fixedly installed on the top of the connecting plate 7. A sleeve 11 for forming the shape of the pot shell 13 is installed on the inner circumferential surface of the fixing plate 8.

[0045] Both the upper plate 1 and the fixed plate 8 have a central through hole for engaging the ejector assembly 12. The mounting plate 6 has sliding grooves 9 on both sides for the latch 1003 in the linkage assembly 10 to pass through and move.

[0046] A linkage component 10 is provided between the upper plate 1 and the lower plate 2. The linkage component 10 is used to drive the connecting plate 7, the fixing plate 8 and the housing 11 to move upward when the lower plate 2 is pulled upward.

[0047] An ejector assembly 12 is installed inside the casing 11. When demolding, the ejector assembly 12 pushes the inverted buckle 14 on the inner circumferential surface of the kettle shell 13, causing the kettle shell 13 to be ejected from the casing 11.

[0048] Working principle: During injection molding, the piston rod of the hydraulic cylinder 3 is in the extended state, and the locking block 402 of the adjusting component 4 is locked into the locking groove 5 of the lower plate 2. The upper plate 1 and the lower plate 2 are locked together to withstand the injection pressure.

[0049] After injection molding is completed, the mold opening stage begins. The injection molding machine drives the lower plate 2 downwards, separating it from the upper plate 1. During this process, since the piston rod of the hydraulic cylinder 3 is still in the extended state, the locking block 402 at its end is engaged in the locking groove 5 of the lower plate 2. The downward movement of the lower plate 2 will force the piston rod of the hydraulic cylinder 3 to be passively extended until the preset mold opening stroke is reached. At this time, the pot shell 13 remains in the cavity of the sleeve 11 on one side of the lower plate 2.

[0050] After mold opening is completed, the product ejection stage begins. The piston rod of hydraulic cylinder 3 begins to retract actively, and through the cooperation of adjusting component 4 and locking groove 5, it continues to pull the lower plate 2 upward to eject the product. This is done in two steps:

[0051] In the first step, synchronous movement occurs, and the molded part exits the undercut 14. The piston rod of the hydraulic cylinder 3 retracts, pulling the lower plate 2 upward. The locking mechanism 1003 locks the connecting plate 7 and the fixing plate 8, causing the connecting plate 7, the fixing plate 8, the housing 11, and the ejection assembly 12 to move upward a distance synchronously with the lower plate 2. During this synchronous movement, the insert 1201 fixed on the connecting plate 7 moves upward accordingly. The inclined structure on the outer circumference of the insert 1201 drives the molded part in the radial guide groove inside the housing 11 to slide outward, allowing the molded end of the molded part to smoothly exit from the undercut 14 on the inner circumference of the housing 13, thus removing the obstruction of the undercut 14 to demolding.

[0052] In the second step, the latch 1003 disengages, and the product is ejected and demolded a second time. When the lower plate 2 is pulled upward to the preset stroke, the latches 1003 on both sides of the connecting plate 7 touch the limiting position at the top of the limiting plate 1002 fixed to the outer wall of the fixed plate 8. The latches 1003 are then forced to retract inward and disengage from the pull hook 1001. At this time, the connecting plate 7 and the ejection assembly 12 above it stop moving. Under the continued pulling of the hydraulic cylinder 3, the lower plate 2 drives the sleeve 11 and the pot shell 13 to continue moving upward. Since the ejector block 1202 has stopped, the ejector block 1202 smoothly ejects the pot shell 13 from the cavity of the sleeve 11, completing the final demolding of the product.

[0053] This mold simultaneously achieves mold closing and locking, mold opening and secondary ejection drive through the inverted hydraulic cylinder 3. One set of hydraulic cylinder 3 completes multiple actions. It has a compact structure and reliable operation, effectively solving the problem of difficult demolding of the inverted 14 inside the kettle shell 13. It has a high product yield and is suitable for automated production.

[0054] Example 2

[0055] Please see Figure 1 , 2 In addition to the above embodiments, this embodiment further improves upon the following technical solutions: The adjusting component 4 includes a linkage block 401 and a locking block 402 disposed on one side of the linkage block 401. The linkage block 401 is fixedly connected to the output end of the hydraulic cylinder 3, and the locking block 402 is detachably engaged with the locking groove 5. The hydraulic cylinder 3 is inverted and fixed on the upper plate 1, with its piston rod extending downwards. During mold closing and injection molding, the piston rod extends, the locking block 402 engages with the locking groove 5, and the upper plate 1 and lower plate 2 are locked together. During ejection, the piston rod retracts actively, the locking block 402 remains engaged with the locking groove 5, and the lower plate 2 continues to be pulled upwards to complete the product ejection. After demolding, the piston rod of the hydraulic cylinder 3 extends again, pushing the lower plate 2 back to its initial position, preparing for the next cycle. Due to the detachable locking design, mold disassembly and cylinder maintenance are more convenient.

[0056] Example 3

[0057] Please see Figure 3-8Based on the above embodiments, this embodiment further improves upon the following technical solution: the linkage component 10 includes hooks 1001 symmetrically arranged on the lower surface of the upper plate 1, limiting plates 1002 arranged on the outer walls of both sides of the fixed plate 8, and fasteners 1003 arranged on the outer walls of both sides of the connecting plate 7. The limiting plate 1002 is a concave plate, with a groove formed between its two side walls, and the top of the groove forms a limiting point that restricts the upper stroke of the fastener 1003. When the lower plate 2 is pulled upward by the hydraulic cylinder 3, the lower plate 2 drives the connecting plate 7, the fixing plate 8, and the housing 11 to move upward together. The latch 1003 moves upward along the slide groove 9 and the slide groove of the limiting plate 1002. When the latch 1003 touches the limiting step at the limiting point, the latch 1003 is forced to retract inward and disengage from the hook 1001. The latch 1003 is an elastic latch plate. When the latch 1003 moves upward and touches the pressing slope, the latch 1003 swings inward to disengage the hook from the hook 1001, and the connecting plate 7 stops moving, thereby precisely controlling the stroke of the first stage of synchronous movement and preventing over-ejection. At the same time, the ejection assembly 12 includes a core 1201 and a top block 1202. The core 1201 is fixed on the connecting plate 7, and the top block 1202 is installed on the top of the core 1201. The outer circumferential surface of the insert 1201 is provided with a sloping structure. A molded part with a forming buckle 14 is slidably installed in the radial guide groove on the inner wall of the shell 11. The molded part is provided with a passive sloping surface that cooperates with the sloping surface of the insert 1201. During the synchronous movement stage, the sloping surface of the insert 1201 drives the molded part to retract radially outward from the buckle 14. The buckles 14 are arranged at intervals along the center of the inner circumferential surface of the shell 13, so the molded part is subjected to uniform force and the buckle retraction is smooth. During the secondary ejection stage, the top block 1202 smoothly pushes the shell 13, which has been released from the constraint of the buckle 14, out of the shell 11, and the surface of the finished product is undamaged.

[0058] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A mold for demolding a coffee pot shell by inverting it, characterized in that, include: An upper plate (1) and a lower plate (2), wherein the lower plate (2) is disposed below the upper plate (1); Oil cylinders (3) are fixedly installed at the diagonal sides of the upper plate (1). The oil cylinders (3) are inverted and the output end of the oil cylinders (3) extends downward and is fixedly installed with an adjustment component (4). The lower plate (2) has a snap-fit ​​groove (5) at the diagonal side corresponding to the oil cylinders (3). The oil cylinders (3) are used to pull the lower plate (2) upward after the mold is opened by the cooperation of the adjustment component (4) and the snap-fit ​​groove (5) to eject the product. An installation plate (6) is fixedly installed on the bottom of the inner wall of the lower plate (2), a connecting plate (7) is provided on the upper surface of the installation plate (6), a fixing plate (8) is fixedly installed on the top of the connecting plate (7), and sliding grooves (9) are opened on both sides of the installation plate (6). A linkage assembly (10) is provided between the upper plate (1) and the lower plate (2). The linkage assembly (10) is used to generate a phased relative axial displacement between the connecting plate (7), the fixing plate (8) and the sleeve (11) and the lower plate (2) during the process of the lower plate (2) being pulled upward by the oil cylinder (3), so as to realize the demolding action of first pulling the core and then withdrawing. The inner circumferential surface of the fixing plate (8) is provided with a sleeve (11), and an ejector assembly (12) is installed inside the sleeve (11). The ejector assembly (12) is used to push the inverted buckle (14) on the inner circumferential surface of the kettle shell (13) during demolding, so that the kettle shell (13) is demolded.

2. The mold for demolding a coffee pot shell surface by inverting as described in claim 1, characterized in that, The adjustment component (4) includes a linkage block (401) and a snap-fit ​​block (402) disposed on one side of the linkage block (401). The linkage block (401) is fixedly connected to the output end of the oil cylinder (3), and the snap-fit ​​block (402) is detachably snap-fitted into the snap-fit ​​groove (5).

3. The mold for demolding a coffee pot shell surface by inverting as described in claim 1, characterized in that, The linkage component (10) includes hooks (1001) symmetrically arranged on the lower surface of the upper plate (1) and limiting plates (1002) arranged on the outer walls of both sides of the fixed plate (8), as well as buckles (1003) arranged on the outer walls of both sides of the connecting plate (7). When the lower plate (2) is pulled upward by the oil cylinder (3), the lower plate (2) drives the connecting plate (7), the fixed plate (8) and the housing (11) to move upward together, and the segmented movement is achieved through the cooperation of buckles (1003) and hooks (1001).

4. The mold for demolding an inverted coffee pot shell according to claim 3, characterized in that, The slot (9) on the mounting plate (6) allows the buckle machine (1003) to pass through and move.

5. A mold for demolding a coffee pot shell surface by inverting, as described in claim 3, characterized in that, The limiting plate (1002) is a concave plate, with a groove formed between its two side walls, and the top of the groove forms a limiting point for the travel of the limiting machine (1003).

6. The mold for demolding a coffee pot shell surface by inverting as described in claim 1, characterized in that, The ejection assembly (12) includes a core (1201) and a top block (1202). The core (1201) is fixed on the connecting plate (7). The outer circumferential surface of the core (1201) is provided with a slope structure. The inner wall of the shell (11) is provided with a radial guide groove. A molded part of a forming buckle (14) is slidably installed in the guide groove. The forming part is provided with a passive slope that cooperates with the slope structure of the core (1201). The top block (1202) is installed on the top of the core (1201). The top block (1202) is used to push the buckle (14) on the inner circumferential surface of the kettle shell (13) during demolding, so that the kettle shell (13) is demolded.

7. A mold for demolding a coffee pot shell surface by inverting, as described in claim 6, characterized in that, The molded parts of the molded inverted buckle (14) are arranged at intervals along the center of the inner circumference of the pot shell (13).

8. A mold for demolding a coffee pot shell surface by inverting, as described in claim 1, characterized in that, Both the upper plate (1) and the fixing plate (8) are provided with a central through hole.

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