Coffee machine rear cover injection mold

Abstract

The application discloses a coffee machine rear cover injection mold, which comprises a supporting base, a molding base provided at the top of the supporting base, a molding top base provided at the top of the molding base, a clamping base and a clamping top base, a molding pot connected with a molding pot connector at one end, a molding pot locking head, a first positioning base and a second positioning base. The application can be quickly plugged with the molding pot and the molding pot locking head, is convenient to disassemble and assemble, and can quickly replace the mold core. The electric screw rod drives the first adjusting base to realize automatic locking and unlocking, the mold locking is stable, and the operation is convenient. The buffer column cooperates with the ejector pin to realize smooth ejection, avoids damaging the plastic part during the ejection process, can buffer the mold closing impact force, prolongs the service life of the mold, and forms an inner-outer double-layer cooling loop through the molding pot inner pipe connected with the inner circulation conveying pipe in the molding pot and the outer circulation conveying pipe connected with the outer circulation pipe outside the molding pot, so that the molding cycle is effectively shortened.

Description

Technical Field

[0001] This invention relates to the field of mold technology for coffee machine parts production, and in particular to an injection mold for a coffee machine back cover. Background Technology

[0002] Injection molding is the mainstream processing method for plastic shell parts. As an exterior covering part of a coffee machine, the coffee machine back cover has the characteristics of thin walls, many structural details, and high requirements for surface quality and dimensional accuracy. Its molding quality directly affects the assembly accuracy and appearance of the coffee machine.

[0003] Existing injection molds for coffee machine back covers have several defects in actual production, such as: insufficient mold closing and positioning layers, with the upper and lower molds and mold cores relying solely on edge guide pillars for positioning, which easily leads to misalignment during mold closing, resulting in flash, mold misalignment, and a low yield rate; a simple cooling water channel layout, typically with water channels only on the cavity side, leaving insufficient cooling on the core side, leading to uneven cooling inside and outside the plastic part, which can easily cause warping and deformation, and also results in low cooling efficiency and a long molding cycle; and poor heat preservation in the runner, causing the molten material to cool and condense easily during flow within the runner, which can easily lead to material blockage and cold material entering the cavity. Therefore, it is necessary to invent a new injection mold for coffee machine back covers. Summary of the Invention

[0004] This invention provides an injection mold for a coffee machine back cover. It features a quick-connect connection between the molding tank and the molding tank locking head, facilitating easy assembly and disassembly and allowing for rapid core replacement. An electric screw drives the first adjusting seat for automatic locking and unlocking, ensuring stable mold locking and convenient operation. A buffer column, in conjunction with ejector pins, ensures smooth ejection, preventing damage to the plastic part during ejection and buffering the impact force during mold closing, thus extending the mold's lifespan. By incorporating an inner tube connecting to an internal circulation conveying pipe within the molding tank and an outer circulation conveying pipe connecting to an external circulation connecting pipe, a double-layer cooling circuit is formed. This allows for simultaneous and uniform cooling of both the core and cavity sides, reducing the risk of warping and deformation of the plastic part, while also shortening cooling time and effectively reducing the molding cycle.

[0005] To solve the above-mentioned technical problems, the present invention provides an injection mold for a coffee machine back cover, comprising: A support base is provided with a molding base on top, and a molding top seat is provided on the top of the molding base, which is matched and engaged with the molding base; A positioning base and a positioning top seat are disposed between the forming top seat and the forming base. Connecting side seats are evenly provided on the outer sides of the positioning base and the positioning top seat. A third positioning top groove and a third positioning bottom groove are respectively provided inside the positioning base and the positioning top seat. A molding tank is disposed between the card slot base and the card slot top seat. One end of the molding tank is connected to a molding tank connector. A molding tank extension sleeve is arranged around the outside of the molding tank connector. The molding tank includes a molding tank bottom shell and a molding tank top shell, and a molding tank inner tube is evenly arranged inside the molding tank. A molding tank side plate is fixedly provided on the outside of the molding tank top shell. A molding tank locking head is provided on one side of the molding tank. One end of the molding tank locking head is provided with a locking head connector that matches the molding tank connector. The molding tank locking head is provided with positioning pipes evenly distributed inside and extending to the surface of the molding tank connector. The molding tank and the molding tank locking head are surrounded by a diversion pipe and an external circulation conveying pipe. The first positioning seat and the second positioning seat are respectively disposed on the locking head of the molding can and the outside of the molding can.

[0006] As a preferred embodiment of the above technical solution, buffer columns are evenly provided between the support base and the molding base. Ejector pins and support rods are evenly provided on the inner side of the buffer columns. One end of the top of the ejector pin penetrates through the molding base and the locking base and extends to the bottom of the molding tank side plate on the outer side of the molding tank top shell.

[0007] As a preferred embodiment of the above technical solution, the molding top seat has a through injection main cavity, the molding top seat has a molding top cavity, and the bottom of the molding top seat has connecting slot seats on both sides. The bottom of the connecting slot seats is provided with inclined connecting slot posts. The side of the molding top cavity near the first positioning seat and the second positioning seat is provided with a first slot top groove and a second slot top groove, respectively. The bottom of the molding top seat is uniformly provided with positioning posts.

[0008] As a preferred embodiment of the above technical solution, the molding base has a molding cavity inside, and connecting slots are provided on both sides of the top of the molding base. The connecting slot seat matches the connecting slot, and the surface of the connecting slot is provided with a slot that matches the connecting post. One end of the inner side of the connecting slot seat is provided with a rod, and the inner side of the slot seat is provided with a slot that matches the rod. The rod extends through the slot to the surface of the molding tank extension plate. The bottom of the second slot top groove and the first slot top groove are respectively provided with a first slot bottom groove and a second slot bottom groove. The first positioning seat and the second positioning seat are respectively engaged on the surface of the second slot bottom groove and the first slot bottom groove. The surface of the molding base is uniformly provided with positioning grooves that match the positioning post.

[0009] As a preferred embodiment of the above technical solution, the top seat is provided with a through injection cavity, the main injection cavity is provided with the top seat and is inserted into the injection cavity, the outer side of the top seat is provided with an external connecting seat, the surface of the top seat is provided with an annular positioning groove and multiple positioning grooves, the bottom surface of the top seat is provided with an annular connecting block and multiple positioning protrusions, the annular connecting block and the positioning protrusions are respectively movably engaged with the annular positioning groove and the positioning grooves, one end of the bottom of the main injection cavity is engaged with the inner side of the annular connecting block, the top seat and the base are respectively provided with a third positioning top groove and a third positioning bottom groove with an arc shape, the third positioning top groove is fixedly provided with a sliding groove, one end of the sliding groove is connected to a pin groove, the third positioning bottom groove is provided with a locking limiting groove and a locking positioning groove, and the support rod on the surface of the support base is provided with a through locking limiting groove and extends to the bottom surface of the molding tank.

[0010] As a preferred embodiment of the above technical solution, the bottom shell and the top shell of the molding tank are interlocked. A molding tank support seat is provided on the rear side of the molding tank, and the molding tank support seat is evenly provided with molding tank connection holes. One end of the inner tube of the molding tank is connected to the molding tank connection hole. A molding tank extension block is provided on one end of the top shell of the molding tank. Two molding tank connection pipes are symmetrically arranged on the surface of the molding tank extension sleeve. A molding tank extension column is provided inside the molding tank connection pipe. Both the molding tank extension block and the molding tank extension column extend to the inside of the molding tank locking head. A molding tank top rod is fixedly provided on the top of the molding tank extension sleeve. The molding tank top rod passes through the slide groove and extends into the interior of the locking top seat. A connecting pin is provided on the surface of the molding tank top rod and the connecting pin is interlocked with the slide groove. A molding tank positioning column is fixedly provided on the top of the side plate of the molding tank. The molding tank positioning columns are symmetrically arranged with the molding tank top rod as the center. A snap-fit ​​groove matching the end of the molding tank positioning column is provided at the edge of the third locking top groove.

[0011] As a preferred embodiment of the above technical solution, the molding can extension sleeve covers the outer wall of the molding can locking head, the top of the inner wall of the molding can locking head is provided with a locking head slot, the top of the molding can locking head is provided with a locking head positioning seat, the molding can extension block and the connecting pin are respectively inserted into the locking head slot and the locking head positioning seat, a locking head support is fixedly provided on the outer side of the molding can locking head, and the surface of the locking head support is evenly provided with locking head connecting holes, a positioning pipe is provided inside the locking head connecting holes, one end of the positioning pipe is provided with an injection molding tube and is connected to the locking head... The fitting is connected to the head connection hole. A diversion pipe is provided on the outside of the positioning pipe. The diversion pipe is connected to one end of the bottom of the injection main cavity. A flow pipe is connected between the diversion pipe and the injection pipe. An external circulation conveying pipe is arranged around the outside of the molding tank. An external circulation connecting pipe is connected to the outside of the external circulation conveying pipe. An internal circulation conveying pipe is connected to the outside of the molding tank support. The internal circulation conveying pipe is connected to the inner pipe of the molding tank through the molding tank connection hole. The ends of the external circulation connecting pipe and the internal circulation conveying pipe are both connected to a cooling device through a cooling pipe.

[0012] As a preferred embodiment of the above technical solution, the first positioning seat is engaged between the second positioning bottom groove and the first positioning top groove. An electric lead screw is provided on the outer side of the first positioning seat. The output end of the electric lead screw is connected to a first adjusting seat. A first locking positioning groove is provided on the surface of the first adjusting seat. A first positioning seat is matched inside the first locking positioning groove. A first contact plate is provided on the surface of the first adjusting seat. The first contact plate is fitted to the outer wall of the locking head support seat, and the injection tube passes through the first adjusting seat.

[0013] As a preferred embodiment of the above technical solution, the second positioning seat is engaged between the first positioning bottom groove and the second positioning top groove. The inner side of the second positioning seat is provided with a second adjusting seat. The surface of the second adjusting seat is provided with a second locking positioning groove. The second locking positioning groove is matched with a second positioning seat. The rear side of the second positioning seat and the bottom of the second adjusting seat are respectively provided with a locking rear plate and a locking base. The surface of the second adjusting seat is provided with a second contact plate. The second contact plate is fitted to the outer wall of the forming tank support. The internal circulation conveying pipe passes through the second adjusting seat.

[0014] As a preferred embodiment of the above technical solution, the top of the molding top seat is provided with a connecting top seat, the connecting top seat is provided with an installation groove inside and a hot melt runner seat inside the installation groove, the hot melt runner seat is provided with a heating chamber, and an insulation connector is connected to the outside of the hot melt runner seat. The insulation connector is used to insulate and heat the plastic injection inside the hot melt runner seat. The bottom of the hot melt runner seat is connected with an injection main cavity, and the top of the connecting top seat is provided with a top plate, and the top plate is provided with an injection port.

[0015] This invention provides an injection mold for a coffee machine back cover, comprising a support base, a molding top seat, a molding base, a locking base, a locking top seat, a molding can, a molding can locking head, a first positioning seat, a second molding seat, and a connecting top seat. The molding top seat moves towards the molding base to close the mold. The connecting locking seat inserts into a connecting locking groove, and an inclined connecting locking post inserts into a corresponding slot for pre-guidance. The positioning post at the bottom of the molding top seat simultaneously inserts into a positioning groove on the surface of the molding base, completing the initial positioning of the upper and lower molds. As the mold closing stroke advances, the annular connecting block at the bottom of the locking top seat engages with the annular positioning groove on the surface of the locking base, and the locking protrusion simultaneously engages with the locking groove, completing the fine positioning of the mold core assembly. The molding top of the molding can... The can top rod passes through the slide groove, and the connecting pin is inserted into the slide groove to achieve axial positioning. The positioning pin of the molded can on the side plate of the molded can is inserted into the snap-fit ​​groove on the edge of the third locking top groove to complete the circumferential anti-rotation positioning of the molded can. After the mold is closed, the electric screw starts and drives the first adjusting seat to feed towards the mold core. The first locking seat and the second locking seat are respectively inserted into the corresponding locking grooves. With the help of the locking back plate and locking base, the locking on both sides of the mold is completed, ensuring that the clamping force is uniform and stable. During the injection filling stage, the molten plastic is injected from the injection port into the hot melt runner seat in the connecting top seat. The heat preservation connector continuously heats and preserves the hot melt runner seat to prevent the molten material from condensing in the runner. The molten material enters the distribution pipe downward through the main injection cavity and is evenly distributed through multiple flow pipes. The molten material flows to each injection tube and is evenly injected from the locking head side of the molding tank into the closed cavity formed by the molding top cavity, molding bottom cavity, and molding tank until the cavity is completely filled. Then, the pressure holding stage is entered to replenish the molten material. After pressure holding, cooling water enters the molding tank support through the internal circulation pipe and is distributed to the inner pipes of each molding tank through the molding tank connection hole, circulating inside the molding tank to remove heat from the core side. Another cooling water path enters the external circulation pipe through the external circulation connecting pipe, circulating outside the molding tank and the molding tank locking head to remove heat from the cavity side. The two water paths work simultaneously to achieve uniform cooling of the plastic part inside and out until the part is completely set. After cooling, the electric screw reverses to drive the first adjusting seat back, releasing the locking on both sides of the mold. The injection molding machine drives the molding top seat to move away from the molding base to open the mold. The buffer column between the support base and the molding base provides guidance, and the ejector pin smoothly pushes upward, acting on the side plate of the molding can outside the top shell of the molding can, smoothly pushing the shaped coffee machine back cover out of the molding can, completing one injection cycle. When it is necessary to replace the mold core or perform maintenance, simply release the locking on both sides to remove the molding can and the molding can locking head as a whole from the mold frame without completely disassembling the mold, making maintenance convenient. The entire mold can be quickly connected and disassembled through the quick insertion and removal of the molding can and the molding can locking head, allowing for quick mold core replacement. The electric screw drives the first adjustment seat to achieve automatic locking and unlocking, ensuring stable mold locking and convenient operation.The buffer pillars, in conjunction with the ejector pins, ensure smooth ejection, preventing damage to the plastic part during ejection and buffering the impact force during mold closing, thus extending the mold's lifespan. By incorporating an inner circulation pipe connecting to the internal circulation delivery pipe inside the molding tank and an outer circulation delivery pipe connecting to the external circulation delivery pipe, a double-layer cooling circuit is formed. This allows for simultaneous and uniform cooling of both the core and cavity sides, reducing the risk of warpage and shortening the cooling time, effectively reducing the molding cycle. The initial positioning of the positioning pillars and positioning grooves, the precise positioning of the mold core assembly (ring connecting block and ring positioning groove, locking protrusion and locking groove), and the circumferential positioning of the molding tank positioning pillars and the third locking top groove form a multi-layer positioning structure. This ensures accurate mold closing alignment, effectively preventing misalignment and flash problems, and improving the molding accuracy and yield rate of the plastic parts.

[0016] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0017] Figure 1 This is an exploded view of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention; Figure 3 This is an exploded view of the locking base, locking top seat, molding can, and molding can locking head of the present invention; Figure 4 This is a schematic diagram of the card slot base and card slot top structure of the present invention; Figure 5 This is a schematic diagram showing the connection between the molding can and the molding can locking head of the present invention; Figure 6 This is an exploded view of the molding can and the molding can locking head of the present invention; Figure 7 This is an exploded view of the molding can of the present invention; Figure 8 This is a schematic diagram of the molding base structure of the present invention; Figure 9 This is a schematic diagram of the molding top seat and connecting top seat structure of the present invention.

[0018] In the diagram: 1. Support base, 11. Buffer column, 12. Ejector pin, 2. Molding top seat, 21. Injection main cavity, 22. Molding top cavity, 23. Connecting locking seat, 24. Connecting locking post, 25. First locking top groove, 26. Second locking top groove, 27. Positioning post, 3. Molding base, 31. Molding bottom cavity, 32. Connecting locking groove, 33. First locking bottom groove, 34. Second locking bottom groove, 35. Positioning groove, 4. Locking base, 41. Locking top seat, 42. Connecting side seat 43 Injection cavity, 44 External connector, 45 Annular positioning groove, 451 Locking groove, 46 Annular connecting block, 461 Locking protrusion, 47 Third locking top groove, 471 Sliding groove, 472 Pin groove, 48 Third locking bottom groove, 481 Locking limit groove, 49 Locking locking groove, 5 Molding tank, 501 Molding tank bottom shell, 502 Molding tank top shell, 51 Molding tank support base, 511 Molding tank connecting hole, 52 Molding tank connector head. 53 Molding tank extension sleeve, 54 Molding tank extension block, 55 Molding tank connecting pipe, 551 Molding tank extension column, 56 Molding tank top rod, 561 Connecting insert, 57 Molding tank side plate, 58 Molding tank positioning column, 59 Molding tank inner tube, 6 Molding tank locking head, 61 Locking head support seat, 611 Locking head connecting hole, 62 Locking head connector, 63 Locking head slot, 64 Locking head positioning seat, 65 Positioning pipe, 651 Injection molding pipe, 66 Internal circulation conveying pipe, 67 Diversion pipe, 671 Flow pipe, 68 External circulation conveying pipe, 681 External circulation connecting pipe, 7 First positioning seat, 71 Electric screw, 72 First adjusting seat, 73 First locking seat, 8 Second positioning seat, 81 Second adjusting seat, 82 Second locking seat, 83 Locking back plate, 84 Locking base, 9 Connecting top seat, 91 Mounting groove, 92 Hot melt flow channel seat, 93 Insulated connector, 94 Top plate, 95 Injection port. Detailed Implementation

[0019] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0020] See Figure 1-8 This invention provides an injection mold for a coffee machine back cover, comprising: The support base 1 has a molding base 3 on top, and a molding top seat 2 on the top of the molding base 3. The molding top seat 2 and the molding base 3 are matched and engaged. The positioning base 4 and the positioning top seat 41 are disposed between the forming top seat 2 and the forming base 3. Connecting side seats 42 are evenly provided on the outer side of the positioning base 4 and the positioning top seat 41. The positioning base 4 and the positioning top seat 41 are respectively provided with a third positioning top groove 47 and a third positioning bottom groove 48 inside the positioning base 4 and the positioning top seat 41. A molding tank 5 is positioned between a positioning base 4 and a positioning top seat 41. One end of the molding tank 5 is connected to a molding tank connector 52. A molding tank extension sleeve 53 is arranged around the outside of the molding tank connector 52. The molding tank 5 includes a molding tank bottom shell 501 and a molding tank top shell 502. A molding tank inner tube 59 is evenly arranged inside the molding tank 5. A molding tank side plate 57 is fixedly arranged on the outside of the molding tank top shell 502. A molding tank locking head 6 is located on one side of the molding tank 5. One end of the molding tank locking head 6 is provided with a locking head connector 62 that matches the molding tank connector 52. The molding tank locking head 6 is provided with positioning pipes 65 evenly inside and extends to the surface of the molding tank connector 52. The molding tank 5 and the molding tank locking head 6 are surrounded by a diversion pipe 67 and an external circulation conveying pipe 68. The first positioning seat 7 and the second positioning seat 8 are respectively located on the outside of the molding can locking head 6 and the molding can 5.

[0021] This embodiment provides an injection mold for a coffee machine back cover, comprising a support base 1, a molding top seat 2, a molding base 3, a locking base 4, a locking top seat 41, a molding can 5, a molding can locking head 6, a first positioning seat 7, a second molding seat 8, and a connecting top seat 9. The molding top seat 2 moves towards the molding base 3 to close the mold. The connecting locking seat 23 inserts into the connecting locking groove 32, and the inclined connecting locking pins 24 insert into corresponding slots for pre-guidance. Simultaneously, the positioning pins 27 at the bottom of the molding top seat 2 insert into the positioning grooves 35 on the surface of the molding base 3, completing the initial positioning of the upper and lower molds. As the mold closes... As the mold advances, the annular connecting block 46 at the bottom of the locking top seat 41 engages with the annular positioning groove 45 on the surface of the locking base 4, and the locking protrusion 461 simultaneously engages with the locking groove 451, completing the precise positioning of the mold core assembly; the molding tank ejector rod 56 at the top of the molding tank 5 passes through the slide groove 471, and the connecting pin 561 engages with the slide groove 471 to achieve axial positioning; the molding tank positioning pin 58 on the side plate 57 of the molding tank engages with the snap-fit ​​groove on the edge of the third locking top groove 47, completing the circumferential anti-rotation positioning of the molding tank 5; after the mold is closed, the electric lead screw 71 starts, driving the first adjusting seat 72 to feed towards the mold core. The first locking seat 73 and the second locking seat 82 respectively engage with their corresponding locking slots, and together with the locking back plate 83 and the locking base 84, complete the locking of both sides of the mold, ensuring uniform and stable clamping force. During the injection filling stage, molten plastic is injected from the injection port 95 into the hot melt runner seat 92 inside the connecting top seat 9. The heat-insulating connector 93 continuously heats and insulates the hot melt runner seat 92 to prevent the molten material from condensing in the runner. The molten material enters the distribution pipe 67 downward through the main injection cavity 21, and is evenly distributed to each injection pipe 651 through multiple flow pipes 671. It is then evenly injected from the side of the molding tank locking head 6 into the molding top cavity 22 and the molding can. The molded part is enclosed by the bottom cavity 31 and the molding tank 5 to form a closed cavity until the cavity is completely filled. Then, the pressure holding stage is entered to replenish the melt. After the pressure holding is completed, one cooling water enters the molding tank support 51 through the inner circulation conveying pipe 66 and is distributed to the inner pipes 59 of each molding tank through the molding tank connection hole 511. It circulates inside the molding tank 5 to remove the heat from the core side. The other cooling water enters the outer circulation conveying pipe 68 through the outer circulation connecting pipe 681 and circulates outside the molding tank 5 and the molding tank locking head 6 to remove the heat from the cavity side. The two water paths work simultaneously to achieve uniform cooling of the plastic part inside and out until the plastic part is completely set.After cooling, the electric screw 71 reverses and drives the first adjusting seat 72 to retract, releasing the locking on both sides of the mold. The injection molding machine then moves the molding top seat 2 away from the molding base 3 to open the mold. The buffer column 11 between the support base 1 and the molding base 3 provides guidance, and the ejector pin 12 smoothly pushes upward, acting on the molding can side plate 57 on the outside of the molding can top shell 502, smoothly pushing the shaped coffee machine back cover off the molding can 5, completing one injection cycle. When it is necessary to replace the mold core or perform maintenance, simply release the locking on both sides to remove the molding can 5 and the molding can locking head 6 as a whole from the mold frame without completely disassembling the mold, making maintenance convenient. The entire mold can be easily disassembled and assembled through the quick insertion and removal of the molding can 5 and the molding can locking head 6, allowing for quick mold core replacement. The electric screw 71 drives the first adjusting seat 72 to achieve automatic locking and unlocking, ensuring stable mold locking and convenient operation. The buffer pillar 11, in conjunction with the ejector pin 12, ensures smooth ejection, preventing damage to the plastic part during ejection and buffering the impact force during mold closing, thus extending the mold's service life. A double-layer cooling circuit is formed by installing an inner pipe 59 connected to the inner circulation conveying pipe 66 inside the molding tank 5 and an outer circulation conveying pipe 68 connected to the outer circulation connecting pipe 681 outside the molding tank 5. This allows for simultaneous and uniform cooling of both the core and cavity sides, reducing the risk of warping and deformation of the plastic part, while also shortening the cooling time and effectively reducing the molding cycle. The initial positioning of the positioning pillar 27 and positioning groove 35, the precise positioning of the mold core assembly of the annular connecting block 46 and annular positioning groove 45, the precise positioning of the locking protrusion 461 and locking groove 451, and the circumferential positioning of the molding tank positioning pillar 58 and the third locking top groove 47 form a multi-layer positioning structure. This ensures accurate mold closing alignment, effectively avoiding misalignment and flash problems, and improving the molding accuracy and yield of the plastic part.

[0022] In a further embodiment of this invention, buffer columns 11 are uniformly provided between the support base 1 and the molding base 3. Ejector pins 12 and support rods are uniformly provided on the inner side of the buffer columns 11. One end of the top of the ejector pin 12 passes through the molding base 3 and the locking base 4 and extends to the bottom of the molding tank side plate 57 on the outer side of the molding tank top shell 502.

[0023] In this embodiment, the buffer column 11 connects the support base 1 and the molding base 3, which can buffer the rigid impact force of the upper and lower molds during the mold closing process, reduce the collision and wear of the mold core, and extend the service life of the mold. The ejector pin 12 and the matching support rod are evenly distributed along the inner side of the buffer column 11, so that the force is uniform during the ejection process. The ejection force is directly applied to the bottom of the side plate 57 of the molding tank, which can smoothly eject the molded product from the core and avoid uneven force on the ejector pins from damaging the product surface. At the same time, the support rod is guided through the locking limit groove 481 to ensure that there is no deviation or jamming during the movement of the ejector pin.

[0024] In a further embodiment of this invention, the molding top seat 2 is provided with a through injection main cavity 21, the molding top seat 2 is provided with a molding top cavity 22, and the bottom sides of the molding top seat 2 are provided with connecting slot seats 23. The bottom of the connecting slot seats 23 is provided with inclined connecting slot posts 24. The side of the molding top cavity 22 near the first positioning seat 7 and the second positioning seat 8 is provided with a first slot top groove 25 and a second slot top groove 26, respectively. The bottom of the molding top seat 2 is provided with positioning posts 27 evenly distributed.

[0025] In this embodiment, the molding top seat 2 serves as the main body of the upper mold, and the internal molding top cavity 22 constitutes the upper part of the product cavity. The through-type injection main cavity channel 21 provides a main channel for the molten material. The flow channel is smooth and without steps, which can reduce the flow resistance of the molten material. The connecting locking seats 23 on both sides of the bottom cooperate with the inclined connecting locking pins 24 to realize the pre-positioning of the upper and lower molds. The first locking top groove 25 and the second locking top groove 26 on both sides provide locking positions for the side locking structure. The positioning pins 27 evenly distributed at the bottom cooperate with the positioning structure of the lower mold to ensure the accurate mold closing position of the upper mold and avoid the problems of mold misalignment and flash.

[0026] In a further embodiment of this invention, the molding base 3 has a molding cavity 31 inside, and the top two sides of the molding base 3 are respectively provided with connecting slots 32. The connecting slot seat 23 matches the connecting slot 32. The surface of the connecting slot 32 is provided with slots that match the connecting slot posts 24. One end of the inner side of the connecting slot seat 23 is provided with a rod. The inner side of the slot base 4 is provided with a slot that matches the rod. The rod extends through the slot to the surface of the molding tank extension sleeve 53. The bottom of the second slot top groove 26 and the first slot top groove 25 are respectively provided with a first slot bottom groove 33 and a second slot bottom groove 34. The first positioning seat 7 and the second positioning seat 8 are respectively locked on the surface of the second slot bottom groove 34 and the first slot bottom groove 33. The surface of the molding base 3 is uniformly provided with positioning grooves 35 that match the positioning posts 27.

[0027] In this embodiment, the molding base 3 serves as the lower mold body, and the internal molding bottom cavity 31 constitutes the lower half of the product cavity. It cooperates with the molding top cavity 22 to form a complete product molding space. The connecting slots 32 on both sides of the top are adapted to the upper mold connecting slot seat 23. With the slot matching the connecting slot post 24, the upper and lower molds can be accurately engaged. The insert rod inside the connecting slot seat 23 passes through the slot base 4 and abuts against the surface of the molding tank extension sleeve 53. When the mold is closed, it can play an axial limiting role for the internal mold core, preventing the mold core from axially shifting due to injection pressure. The first slot bottom groove 33 and the second slot bottom groove 34 correspond to the slot top groove of the upper mold, providing installation space for the positioning seats on both sides. The positioning grooves 35 evenly arranged on the surface are adapted to the upper mold positioning post 27, further improving the positioning accuracy of the upper and lower molds.

[0028] In a further embodiment of this invention, the top seat 41 is provided with a through injection molding cavity 43, the main injection molding cavity 21 is provided with a through molding top seat 2 and is inserted into the injection molding cavity 43, the outer side of the top seat 41 is provided with an external connecting seat 44, the surface of the top seat 41 is provided with an annular positioning groove 45 and a plurality of positioning grooves 451, the bottom surface of the top seat 41 is provided with an annular connecting block 46 and a plurality of positioning protrusions 461, the annular connecting block 46 and the positioning protrusions 461 are respectively movable with the annular positioning groove 45 and the positioning grooves 451. The injection main cavity 21 is snapped into place at one end, which is attached to the inner side of the annular connecting block 46. The top slot 41 and the bottom slot 4 are respectively provided with a third slot top groove 47 and a third slot bottom groove 48 with an arc shape. The top slot 47 is fixedly provided with a sliding groove 471. One end of the sliding groove 471 is connected to a pin groove 472. The bottom slot 48 is provided with a locking limit groove 481 and a locking slot 49. The support rod on the surface of the support base 1 passes through the locking limit groove 481 and extends to the bottom surface of the molding tank 5.

[0029] In this embodiment, the injection cavity 43, which is provided through the locking top seat 41, is sealed and inserted into the main injection cavity 21 to ensure smooth connection of the molten material flow and avoid overflow. The external connecting seat 44 is used to connect and fix the mold core assembly to the side structure of the mold frame. The annular positioning groove 45 and the locking groove 451 on the surface of the locking top seat 41 are matched with the annular connecting block 46 and the locking protrusion 461 at the bottom. When the mold is closed, the radial precision positioning of the mold core assembly can be achieved. The positioning accuracy is high and there is no radial offset. The inner side of the annular connecting block 46 locks the end of the main injection cavity 21. It can provide a positioning and sealing function at the end of the main channel; the third locking top groove 47 and the third locking bottom groove 48 are arc structures that are compatible with the shape of the molding tank 5 and can stably cover and fix the internal core; the sliding groove 471 in the third locking top groove 47 provides a sliding guide for the positioning structure at the top of the core, the pin groove 472 cooperates with the positioning structure to realize the circumferential anti-rotation of the core, the locking limit groove 481 in the third locking bottom groove 48 provides a motion guide for the ejection support rod, and the locking locking groove 49 is used to cooperate with the locking structure of the lower mold to ensure that the mold core assembly is firmly fixed.

[0030] In a further embodiment of this invention, the bottom shell 501 and the top shell 502 of the molding tank are interlocked. A molding tank support 51 is provided on the rear side of the molding tank 5. The molding tank support 51 is evenly provided with molding tank connection holes 511. One end of the inner tube 59 of the molding tank is connected to the molding tank connection hole 511. One end of the top shell 502 of the molding tank is provided with a molding tank extension block 54. Two symmetrically arranged molding tank connection pipes 55 are provided on the surface of the molding tank extension sleeve 53. A molding tank extension column 551 is provided inside the molding tank connection pipe 55. The molding tank extension block 54 and the molding tank... All extension posts 551 extend to the inner side of the molding tank locking head 6. A molding tank top rod 56 is fixedly provided on the top of the molding tank extension sleeve plate 53. The molding tank top rod 56 passes through the slide groove 471 and extends into the interior of the locking top seat 41. A connecting pin 561 is provided on the surface of the molding tank top rod 56 and the connecting pin 561 is engaged with the slide groove 471. A molding tank positioning post 58 is fixedly provided on the top of the molding tank side plate 57. The molding tank positioning post 58 is symmetrically arranged with the molding tank top rod 56 as the center. A snap-fit ​​groove matching the end of the molding tank positioning post 58 is provided at the edge of the third locking top groove 47.

[0031] In this embodiment, the molding tank 5 serves as the core for the inner shape of the molded product. It employs a separate snap-fit ​​structure between the bottom shell 501 and the top shell 502 of the molding tank, reducing processing difficulty and facilitating the processing and assembly of the internal cooling channels. The rear molding tank support 51 provides support for the entire core. The uniformly arranged molding tank connection holes 511 on the surface communicate with the internal molding tank tube 59, enabling the circulation of the cooling medium within the core. The molding tank extension block 54, the molding tank connection tube 55, and the molding tank extension column 551 within the tube are inserted into the inside of the molding tank locking head 6 to achieve molding. The precise docking of the can 5 and the locking head ensures coaxiality; the molding can top rod 56 is inserted into the slotted top seat 41 along the slide groove 471, and the connecting pin 561 on the surface engages with the slide groove 471, which can realize the axial positioning and circumferential anti-rotation of the molding can 5, and avoid the core rotation and misalignment during injection molding. The molding can positioning pins 58 symmetrically arranged on the side plate 57 of the molding can are adapted to the snap-fit ​​grooves on the edge of the third slotted top groove 47, further improving the circumferential positioning accuracy of the core. At the same time, the side plate 57 of the molding can serves as the ejection surface, which can ensure that the ejection force is evenly applied to the edge of the core, and the ejection is stable.

[0032] In a further embodiment of this invention, the molding can extension sleeve 53 covers the outer wall of the molding can locking head 6. A locking head slot 63 is provided at the top of the inner wall of the molding can locking head 6. A locking head positioning seat 64 is provided at the top of the molding can locking head 6. The molding can extension block 54 and the connecting pin 561 are respectively inserted into the locking head slot 63 and the locking head positioning seat 64. A locking head support seat 61 is fixedly provided on the outer side of the molding can locking head 6, and locking head connection holes 611 are evenly distributed on the surface of the locking head support seat 61. A positioning pipe 65 is provided inside the locking head connection hole 611. One end of the positioning pipe 65 is provided with an injection molding tube 651 and is connected to the locking head. The head connection hole 611 is inserted, and a diversion pipe 67 is provided on the outside of the positioning pipe 65. The diversion pipe 67 is connected to one end of the bottom of the injection main cavity 21. A flow pipe 671 is connected between the diversion pipe 67 and the injection pipe 651. An external circulation conveying pipe 68 is provided around the outside of the molding tank 5. An external circulation connecting pipe 681 is connected to the outside of the external circulation conveying pipe 68. An internal circulation conveying pipe 66 is connected to the outside of the molding tank support 51. The internal circulation conveying pipe 66 is connected to the inner pipe 59 of the molding tank through the molding tank connection hole 511. The ends of the external circulation connecting pipe 681 and the internal circulation conveying pipe 66 are both connected to a cooling device through a cooling pipe.

[0033] In this embodiment, the molding can extension sleeve 53 covers the outer wall of the molding can locking head 6, which can both seal the connection to prevent molten material leakage and provide heat insulation to reduce heat transfer to the side locking structure. The locking head slot 63 and the locking head positioning seat 64 are respectively inserted into the molding can extension block 54 and the connecting post 561, which can realize quick docking and positioning of the molding can 5 and the locking head, and are easy to disassemble and assemble, facilitating mold core replacement. The locking head support seat 61 provides stable support for the locking head structure, and the locking head connection hole 611 on the surface is used to install the positioning pipe 65. The injection tube 651 at the end of the positioning pipe 65 is inserted into the locking head connection hole 611 to realize the flow of glue. The sealing connection of the channels; the diversion pipe 67 is connected to the main injection cavity 21, and the molten material is evenly distributed to each injection pipe 651 through multiple flow pipes 671 to achieve multi-point balanced glue injection and uniform molten material filling, which can effectively reduce the problems of weld lines and insufficient glue in the product. The external circulation conveying pipe 68 is wrapped around the outside of the molding tank 5 and connected to the cooling medium through the external circulation connecting pipe 681 to form the outer layer cooling circuit of the core; the internal circulation conveying pipe 66 is connected to the inner pipe 59 of the molding tank through the molding tank connection hole 511 to form the inner layer cooling circuit of the core; the inner and outer double-layer cooling circuits work simultaneously to achieve uniform cooling inside and outside the core, with high cooling efficiency, reducing product warping and deformation, and effectively shortening the molding cycle.

[0034] In a further embodiment of this invention, the first positioning seat 7 is engaged between the second positioning bottom groove 34 and the first positioning top groove 25. An electric lead screw 71 is provided on the outside of the first positioning seat 7. The output end of the electric lead screw 71 is connected to a first adjusting seat 72. A first locking positioning groove is provided on the surface of the first adjusting seat 72. A first positioning seat 73 is matched inside the first locking positioning groove. A first contact plate is provided on the surface of the first adjusting seat 72. The first contact plate is fitted to the outer wall of the locking head support seat 61, and the injection molding tube 651 passes through the first adjusting seat 72.

[0035] In this embodiment, the first positioning seat 7 serves as the mounting base for the side locking structure. It is fitted between the second locking bottom groove 34 and the first locking top groove 25, ensuring a stable and unbiased installation position. The outer electric lead screw 71 drives the first adjusting seat 72 to feed linearly. The locking position is achieved through the first locking seat 73 in the first locking slot. The feeding process is smooth, and the locking force is controllable. The first contact plate on the surface of the first adjusting seat 72 is attached to the outer wall of the locking head support seat 61. When locking, it can apply a uniform clamping force to the side of the mold core, preventing the mold core from shifting and expanding due to injection pressure. The injection tube 651 passes through the first adjusting seat 72, which does not affect the normal movement of the side locking structure. At the same time, it can provide positioning support for the glue injection pipe, preventing the flow channel from shifting.

[0036] In a further embodiment of this invention, the second positioning seat 8 is engaged between the first positioning bottom groove 33 and the second positioning top groove 26. The inner side of the second positioning seat 8 is provided with a second adjusting seat 81. The surface of the second adjusting seat 81 is provided with a second locking positioning groove. The second locking positioning groove is matched with a second positioning seat 82. The rear side of the second positioning seat 82 and the bottom of the second adjusting seat 81 are respectively provided with a locking rear plate 83 and a locking base 84. The surface of the second adjusting seat 81 is provided with a second contact plate. The second contact plate is fitted to the outer wall of the forming tank support seat 51. The inner circulation conveying pipe 66 passes through the second adjusting seat 81.

[0037] In this embodiment, the second positioning seat 8 is symmetrically arranged with the first positioning seat 7 and is fitted between the first locking bottom groove 33 and the second locking top groove 26. The locking force on both sides is symmetrical and uniform. The second adjusting seat 81 is fixed in the locking position by the second locking seat 82 in the second locking groove. The locking rear plate 83 on the rear side and the locking base 84 at the bottom limit the second adjusting seat 81 from two directions. The force is uniform during locking and there is no loosening or deviation. The second contact plate is attached to the outer wall of the molding tank support 51 and cooperates with the first contact plate on the other side to apply symmetrical locking force to the internal mold core assembly from both sides. The mold locking is stable and reliable. The internal circulation conveying pipe 66 is set through the second adjusting seat 81 without affecting the side locking action. At the same time, it can provide space for the cooling water pipe to pass through, avoiding the pipe being squeezed and damaged.

[0038] In a further embodiment of this invention, the top of the molding top seat 2 is provided with a connecting top seat 9, the connecting top seat 9 is provided with an installation groove 91 and a hot melt runner seat 92 is provided inside the installation groove 91, the hot melt runner seat 92 is provided with a heating chamber, and an insulation connector 93 is connected to the outside of the hot melt runner seat 92. The insulation connector 93 is used to heat and insulate the plastic injection inside the hot melt runner seat 92. The bottom of the hot melt runner seat 92 is connected with an injection main cavity 21, and the top of the connecting top seat 9 is provided with a top plate 94, and the top plate 94 is provided with an injection port 95.

[0039] In this embodiment, the connecting top seat 9 is installed on the top of the molding top seat 2. The internal mounting groove 91 provides positioning and installation space for the hot melt runner seat 92. The hot melt runner seat 92 is equipped with a heating chamber. Together with the external heat-insulating connector 93, it can continuously heat and keep the molten material in the runner, preventing the molten material from cooling and solidifying in the runner, reducing the amount of solidified material in the runner, and preventing cold material from entering the cavity and causing defects such as cold material marks and missing glue on the product surface. The injection port 95 set on the top plate 94 is precisely connected to the injection molding machine nozzle, so there is no overflow problem during injection.

[0040] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0042] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An injection mold for a coffee machine back cover, characterized in that, include: A support base (1) is provided with a molding base (3) on top. A molding top seat (2) is provided on the top of the molding base (3). The molding top seat (2) is matched and engaged with the molding base (3). The carding base (4) and the carding top seat (41) are disposed between the molding top seat (2) and the molding base (3). The carding base (4) and the carding top seat (41) are evenly provided with connecting side seats (42) on their outer sides. The carding base (4) and the carding top seat (41) are respectively provided with a third carding top groove (47) and a third carding bottom groove (48). A molding tank (5) is disposed between the card slot base (4) and the card slot top seat (41). One end of the molding tank (5) is connected to a molding tank connector (52). A molding tank extension sleeve (53) is arranged around the outside of the molding tank connector (52). The molding tank (5) includes a molding tank bottom shell (501) and a molding tank top shell (502). A molding tank inner tube (59) is evenly arranged inside the molding tank (5). A molding tank side plate (57) is fixedly arranged on the outside of the molding tank top shell (502). A molding tank locking head (6) is provided on one side of the molding tank (5). One end of the molding tank locking head (6) is provided with a locking head connector (62) that matches the molding tank connector (52). The molding tank locking head (6) is provided with a positioning pipe (65) evenly inside and extends to the surface of the molding tank connector (52). The molding tank (5) and the molding tank locking head (6) are surrounded by a diversion pipe (67) and an external circulation conveying pipe (68). The first positioning seat (7) and the second positioning seat (8) are respectively located on the outside of the molding can locking head (6) and the molding can (5).

2. The injection mold for a coffee machine back cover according to claim 1, characterized in that, A buffer column (11) is evenly provided between the support base (1) and the molding base (3). A pin (12) and a support rod are evenly provided on the inner side of the buffer column (11). One end of the pin (12) passes through the molding base (3) and the locking base (4) and extends to the bottom of the molding tank side plate (57) on the outer side of the molding tank top shell (502).

3. The injection mold for a coffee machine back cover according to claim 2, characterized in that, The molding top seat (2) has a through injection main cavity (21) inside. The molding top seat (2) has a molding top cavity (22) inside. The bottom sides of the molding top seat (2) are provided with connecting slot seats (23). The bottom of the connecting slot seats (23) is provided with inclined connecting slot posts (24). The molding top cavity (22) is provided with a first slot top groove (25) and a second slot top groove (26) on the side near the first positioning seat (7) and the second positioning seat (8), respectively. The bottom of the molding top seat (2) is provided with positioning posts (27).

4. The injection mold for a coffee machine back cover according to claim 3, characterized in that, The molding base (3) has a molding cavity (31) inside. The molding base (3) has connecting slots (32) on both sides of the top. The connecting slot seat (23) matches the connecting slot (32). The surface of the connecting slot (32) is provided with slots that match the connecting slot post (24). The inner end of the connecting slot seat (23) is provided with a rod. The inner side of the slot base (4) is provided with a slot that matches the rod. The rod extends through the slot to the surface of the molding tank extension sleeve (53). The bottom of the second slot top groove (26) and the first slot top groove (25) are respectively provided with a first slot bottom groove (33) and a second slot bottom groove (34). The first positioning seat (7) and the second positioning seat (8) are respectively locked on the surface of the second slot bottom groove (34) and the first slot bottom groove (33). The surface of the molding base (3) is uniformly provided with positioning grooves (35) that match the positioning post (27).

5. The injection mold for a coffee machine back cover according to claim 4, characterized in that, The top seat (41) is provided with an injection cavity (43) through it. The main injection cavity (21) is provided with a molding top seat (2) through it and is inserted into the injection cavity (43). An external connecting seat (44) is provided on the outside of the top seat (41). The surface of the top seat (41) is provided with an annular positioning groove (45) and multiple positioning grooves (451). The bottom surface of the top seat (41) is provided with an annular connecting block (46) and multiple positioning protrusions (461). The annular connecting block (46) and the positioning protrusions (461) are respectively movably engaged with the annular positioning groove (45) and the positioning grooves (451). One end of the bottom of the main cavity (21) is locked inside the annular connecting block (46). The top seat (41) and the bottom seat (4) are respectively provided with a third top slot (47) and a third bottom slot (48) with an arc. The top slot (47) is fixedly provided with a sliding groove (471). One end of the sliding groove (471) is connected to a pin groove (472). The bottom slot (48) is provided with a locking limit groove (481) and a locking slot (49). The support rod on the surface of the support base (1) passes through the locking limit groove (481) and extends to the bottom surface of the molding tank (5).

6. The injection mold for a coffee machine back cover according to claim 5, characterized in that, The bottom shell (501) and the top shell (502) of the molding tank are interlocked. A molding tank support base (51) is provided on the rear side of the molding tank (5). The molding tank support base (51) is evenly provided with molding tank connection holes (511). One end of the inner tube (59) of the molding tank is connected to the molding tank connection hole (511). One end of the top shell (502) of the molding tank is provided with a molding tank extension block (54). Two molding tank connection pipes (55) are symmetrically arranged on the surface of the molding tank extension sleeve (53). A molding tank extension column (551) is provided inside the molding tank connection pipe (55). Both the molding tank extension block (54) and the molding tank extension column (551) extend... Inside the molding can locking head (6), the top of the molding can extension sleeve (53) is fixedly provided with a molding can top rod (56). The molding can top rod (56) passes through the slide groove (471) and extends into the slot top seat (41). The surface of the molding can top rod (56) is provided with a connecting pin (561) and the connecting pin (561) is engaged with the slide groove (471). The top of the molding can side plate (57) is fixedly provided with a molding can positioning post (58). The molding can positioning post (58) is symmetrically arranged with the molding can top rod (56) as the center. The edge of the third slot top groove (47) is provided with a buckle groove that matches the end of the molding can positioning post (58).

7. The injection mold for a coffee machine back cover according to claim 6, characterized in that, The molding can extension sleeve (53) covers the outer wall of the molding can locking head (6). The top of the inner wall of the molding can locking head (6) is provided with a locking head slot (63). The top of the molding can locking head (6) is provided with a locking head positioning seat (64). The molding can extension block (54) and the connecting pin (561) are respectively inserted into the locking head slot (63) and the locking head positioning seat (64). A locking head support seat (61) is fixedly provided on the outer side of the molding can locking head (6), and the surface of the locking head support seat (61) is uniformly provided with locking head connecting holes (611). A positioning pipe (65) is provided inside the locking head connecting hole (611). One end of the positioning pipe (65) is provided with an injection molding pipe (651) and is connected to the locking head connecting hole (611). The positioning pipe (65) is provided with a diversion pipe (67) on the outside. The diversion pipe (67) is connected to one end of the bottom of the injection main cavity (21). A flow pipe (671) is provided between the diversion pipe (67) and the injection pipe (651). An external circulation conveying pipe (68) is provided around the outside of the molding tank (5). An external circulation connecting pipe (681) is provided on the outside of the external circulation conveying pipe (68). An internal circulation conveying pipe (66) is provided on the outside of the molding tank support base (51). The internal circulation conveying pipe (66) is connected to the inner tube (59) of the molding tank through the molding tank connection hole (511). The ends of the external circulation connecting pipe (681) and the internal circulation conveying pipe (66) are both connected to a cooling device through a cooling pipe.

8. The injection mold for a coffee machine back cover according to claim 7, characterized in that, The first positioning seat (7) is engaged between the second positioning bottom groove (34) and the first positioning top groove (25). An electric lead screw (71) is provided on the outside of the first positioning seat (7). The output end of the electric lead screw (71) is connected to a first adjusting seat (72). A first locking positioning groove is provided on the surface of the first adjusting seat (72). A first positioning seat (73) is matched inside the first locking positioning groove. A first contact plate is provided on the surface of the first adjusting seat (72). The first contact plate is fitted to the outer wall of the locking head support seat (61). The injection tube (651) passes through the first adjusting seat (72).

9. The injection mold for a coffee machine back cover according to claim 7, characterized in that, The second positioning seat (8) is engaged between the first positioning bottom groove (33) and the second positioning top groove (26). The second positioning seat (8) is provided with a second adjusting seat (81) on its inner side. The surface of the second adjusting seat (81) is provided with a second locking positioning groove. The second locking positioning groove is matched with a second positioning seat (82). The rear side of the second positioning seat (82) and the bottom of the second adjusting seat (81) are respectively provided with a locking rear plate (83) and a locking base (84). The surface of the second adjusting seat (81) is provided with a second contact plate. The second contact plate is fitted to the outer wall of the forming tank support seat (51). The inner circulation conveying pipe (66) passes through the second adjusting seat (81).

10. The injection mold for a coffee machine back cover according to claim 2, characterized in that, The top of the molding top seat (2) is provided with a connecting top seat (9), the connecting top seat (9) is provided with an installation groove (91) and the installation groove (91) is provided with a hot melt runner seat (92), the hot melt runner seat (92) is provided with a heating chamber, the hot melt runner seat (92) is connected to an insulation connector (93) on the outside, the insulation connector (93) is used to heat and insulate the plastic injection inside the hot melt runner seat (92), the bottom of the hot melt runner seat (92) is connected with an injection main cavity (21), the top of the connecting top seat (9) is provided with a top plate (94), and the top plate (94) is provided with an injection port (95).

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