Injection mould for the grid outer plate of the anti-inversion and appearance-pulling surface of the dry cleaning machine

Abstract

The application provides a grid outer plate injection molding die for preventing the appearance surface from being pulled and damaged for a dry cleaning machine. The die comprises a front die assembly, a rear die assembly, an ejection mechanism, a core pulling mechanism and a buckle mechanism. The core pulling mechanism is movably connected in the fixed die plate. The buckle mechanism comprises a first buckle and a second buckle. The first buckle is arranged between the movable die plate and the fixed die plate, and is used for driving the movable die plate to move the core pulling stroke at the initial stage of mold opening, so that the core pulling slider smoothly separates from the product buckle. The second buckle is arranged between the ejector pin plate of the ejection mechanism, and is used for controlling two-stage ejection actions. At the first stage of ejection, the lower ejector pin plate set and the upper ejector pin plate jointly eject, so that the inclined ejector pin separates from the internal buckle of the product. At the second stage of ejection, the upper ejector pin plate stops ejection, and the lower ejector pin plate set continues to eject for a preset distance, so that the product completely separates from the core, and the stable part taking is ensured. The core pulling and two-stage ejection are realized by the pure mechanical buckle, and the problem that the appearance surface is easily damaged in the demolding process is solved.

Description

Technical Field

[0001] This invention relates to the field of injection molding, and more particularly to an injection molding mold for a grating outer panel used in dry cleaning machines to prevent damage to the outer surface from backlashing. Background Technology

[0002] Dry cleaning machines, as a common type of household or commercial cleaning equipment, typically have an outer shell structure that includes a grille panel for ventilation, heat dissipation, and decoration. To meet assembly strength and aesthetic requirements, these grille panels often feature complex grille structures and multiple recessed snaps for engaging with the machine body.

[0003] Currently, these types of grating outer panels are mostly integrally molded using injection molds. However, in actual production, due to the dense grating ribs and the undercut grooves on the surface, the mold must have a complex core-pulling mechanism. Traditional core-pulling methods often rely on inclined guide pillars or hydraulic cylinders to drive the slider. However, for products like grating outer panels, the undercuts are usually located on the surface. If a conventional rear mold slider is used for core pulling, the surface of the product is easily scratched during mold opening, affecting the product's appearance. If a front mold is used for core pulling, the mold opening sequence control is extremely important. In existing technologies, improper coordination between the core pulling and mold opening actions often leads to defects such as sticking or whitening in the undercut area, resulting in a low yield rate.

[0004] Therefore, how to design a product that can meet the requirements of complex grilles and inverted molding while ensuring that the product's appearance is not damaged is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing an injection molding mold for a grating outer panel of a dry cleaning machine that prevents damage from backlash.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A molding die for injection molding a grating outer panel for a dry cleaning machine to prevent undercutting and scratching of the exterior surface includes a front mold assembly and a rear mold assembly. The front mold assembly includes a fixed mold plate and a fixed mold core disposed within the fixed mold plate. The rear mold assembly includes a movable mold plate, a movable mold core disposed within the movable mold plate, and an ejection mechanism for ejecting the molded product from the mold cavity. The fixed mold plate and the movable mold plate are configured to open and close together. The mold is provided with a core-pulling mechanism for undercutting the grating holes of the molded product, and the core-pulling mechanism is movably connected within the fixed mold plate. The mold is also provided with a mechanism for... A locking mechanism for controlling the mold opening sequence includes a first locking mechanism and a second locking mechanism. The first locking mechanism is disposed between the moving mold plate and the fixed mold plate, and movably connects the moving mold plate and the fixed mold plate together. The second locking mechanism is disposed between the moving mold plate and the base plate, and movably connects the upper ejector plate and the lower ejector plate assembly together. The ejection mechanism includes a lower ejector plate assembly and an upper ejector plate. The lower ejector plate assembly and the upper ejector plate are movably connected through the second locking mechanism. The lower ejector plate assembly is fixedly connected to the ejector pins, and the upper ejector plate is fixedly connected to the inclined ejector.

[0007] Furthermore, the front mold assembly includes a panel, a backing plate, and a fixed template. The panel is fixedly connected to the backing plate, the backing plate is movably connected to the fixed template via guide posts, and the fixed template contains a fixed mold core.

[0008] Furthermore, the rear mold assembly includes a base plate, a square iron, and a movable template. The base plate is fixedly connected to the square iron, the square iron is fixedly connected to the movable template, and a movable mold core is provided inside the movable template.

[0009] Furthermore, the ejection mechanism includes a first lower ejector plate, a second lower ejector plate, and an upper ejector plate. The first lower ejector plate and the second lower ejector plate are fixedly connected together to form a lower ejector plate assembly. The lower ejector plate assembly is movably connected to the upper ejector plate through a fastening mechanism. Ejector pins are fixedly connected to the first lower ejector plate and the second lower ejector plate, and an inclined ejector and an ejection limiting block are fixedly connected to the upper ejector plate.

[0010] Furthermore, the core-pulling mechanism includes a bent pin and a core-pulling slider. The front end of the bent pin is fixedly connected to the panel, and the rear end of the bent pin is movably connected to the core-pulling slider at an angle. The angle between the bent pin and the core-pulling slider is adapted to the angle of the groove of the outer panel of the grille.

[0011] Furthermore, the fastening mechanism includes a first fastening mechanism and a second fastening mechanism. The first fastening mechanism includes a first fastening mechanism fixing block and a first fastening mechanism connecting block. The first fastening mechanism fixing block and the first fastening mechanism connecting block are movably connected. The first fastening mechanism is disposed between the moving template and the fixed template, and movably connects the moving template and the fixed template together. The second fastening mechanism includes a second fastening mechanism fixing block and a second fastening mechanism connecting block. The second fastening mechanism fixing block and the second fastening mechanism connecting block are movably connected. The second fastening mechanism is disposed between the moving template and the base plate. The second fastening mechanism fixes the first lower ejector plate and the second lower ejector plate together, and movably connects the upper ejector plate to the first lower ejector plate and the second lower ejector plate together.

[0012] Furthermore, an insert is provided at the functional surface position of the first fastener fixing block. The insert is embedded in the groove at the functional surface position of the first fastener fixing block. The insert is quenched and its hardness is required to reach HRC52.

[0013] Furthermore, a positioning boss is provided at the base position of the first fastener fixing block, and the positioning boss and the first fastener fixing block are an integrated structure.

[0014] Furthermore, a snap-fit ​​spring tongue that cooperates with the first snap-fit ​​machine is movably connected to the side wall of the fixed template facing the first snap-fit ​​machine; a snap-fit ​​spring tongue that cooperates with the second snap-fit ​​machine is movably connected to the side wall of the upper ejector plate facing the second snap-fit ​​machine.

[0015] Furthermore, a second buckle pressing block is provided at the front end of the second buckle connecting block, which is adapted to the buckle spring tongue. The second buckle pressing block and the second buckle connecting block are an integrated structure.

[0016] Compared with the prior art, the injection molding mold for the outer grating panel of a dry cleaning machine that prevents damage from backlash has the following advantages: 1. To address the complex structure of the outer grille panel, a smooth core-pulling process is achieved, ensuring the quality of the exterior surface.

[0017] This invention cleverly solves the problem of difficult core pulling caused by the grooved undercut on the outer surface of the grille panel by setting up a first snap-fit ​​mechanism and a core-pulling mechanism. At the initial stage of mold opening, the first snap-fit ​​mechanism drives the moving platen to precisely move the fixed platen by a preset core-pulling stroke, allowing the core-pulling slider installed in the front mold to be smoothly pulled out of the groove on the product's outer surface at the moment of mold opening, before the main parting surface is opened. This timing control method completely avoids the defects such as easy damage to the outer surface caused by traditional rear mold slider core pulling, and defects such as sticking and whitening caused by improper timing coordination of traditional front mold core pulling, significantly improving the product's appearance quality and yield.

[0018] Second, to meet the cleanliness requirements of white parts, a fully mechanical drive is implemented to eliminate oil contamination.

[0019] This invention fully considers the special requirement of zero tolerance for oil stains on the outer panel of the dry cleaning machine's grating, which is a white exterior component. The entire core-pulling action and two-stage ejection action of the mold are completed using a purely mechanical locking mechanism, completely eliminating the hydraulic cylinders commonly used in traditional designs. This design fundamentally eliminates the risk of hydraulic oil leakage and contamination of the mold cavity after long-term use, ensuring the absolute cleanliness of white products during the production process, avoiding batch scrap due to oil stains, and significantly reducing production costs and quality control difficulties.

[0020] Third, to address the difficulties in product demolding and the problem of "jamming", a two-stage refined ejection system is implemented to ensure smooth part removal.

[0021] This invention constructs a two-stage ejection system by setting up a second locking mechanism and a three-layer ejector plate structure, effectively solving the problems of high product demolding resistance and "jamming" after ejection. The first lower ejector plate, the second lower ejector plate, and the upper ejector plate are connected by the second locking mechanism, jointly ejecting the product a preset distance for the first stage. During this process, the inclined ejector fixed to the upper ejector plate smoothly slides out from the internal undercut of the product, achieving non-destructive demolding of the internal undercut. After the first stage ejection is completed, the second locking mechanism disengages, the upper ejector plate stops moving, and the first and second lower ejector plates continue to eject the product a preset distance for the second stage. This action is completed by the long ejector pins fixed to the lower ejector plate assembly, completely pushing the product that is "jammed" due to uneven force or friction away from the core, allowing it to be completely suspended or fall freely. Through the precise coordination of the two-stage ejection, this invention not only protects the internal structure of the product from damage, but also completely solves the industry pain point that products are difficult to remove due to ejector pin compression in traditional molds. This greatly facilitates automated part removal by robotic arms and improves production efficiency and product yield. Attached Figure Description

[0022] Figure 1 This is an exploded structural diagram of the injection molding mold for the anti-backlashing and tearing outer grid panel of the dry cleaning machine according to the present invention. Figure 2 This is a three-dimensional structural schematic diagram of the injection molding mold for the anti-overturning and tearing outer grille panel of the dry cleaning machine according to the present invention; Figure 3 This is a three-dimensional structural schematic diagram of the injection molding mold for the anti-backlashing and tearing outer grid panel of the dry cleaning machine according to the present invention, from another perspective. Figure 4 This is a three-dimensional schematic diagram of the core-pulling mechanism of the injection molding mold for the anti-overturning and tearing outer grid panel of the dry cleaning machine according to the present invention. Figure 5 This is a side view of the core-pulling mechanism of the injection molding mold for the anti-overturning and tearing outer grid panel of the dry cleaning machine according to the present invention. Figure 6This is a three-dimensional schematic diagram of the ejection mechanism of the injection molding mold for the anti-overturning and tearing outer grating panel of the dry cleaning machine according to the present invention; Figure 7 This is a three-dimensional structural diagram of the first fastener of the injection molding die for the anti-backlash and anti-tear surface grating outer panel of the dry cleaning machine of the present invention. Figure 8 This is a three-dimensional structural diagram of the second buckle of the injection molding mold for the anti-backlash and anti-tear surface of the grating outer panel of the dry cleaning machine according to the present invention. Figure 9 This is a partial schematic diagram of the second fastener and the fastener spring tongue engaging in the injection molding process of the anti-backlash and anti-tear surface grid outer panel injection mold for the dry cleaning machine of the present invention; Figure 10 A perspective view of the snap-fit ​​spring tongue of the injection molding die for the anti-backlashing and tearing surface of the grating outer panel of the dry cleaning machine according to the present invention; Figure 11 This is a side view of the latch of the injection molding die for the anti-backlash and anti-tear surface of the grating outer panel of the dry cleaning machine according to the present invention.

[0023] In the diagram: 1. Front mold assembly; 11. Panel; 12. Backing plate; 13. Fixed mold plate; 2. Rear mold assembly; 21. Base plate; 22. Square iron; 23. Moving mold plate; 3. Ejection mechanism; 31. First lower ejector plate; 32. Second lower ejector plate; 33. Upper ejector plate; 331. Ejection limit block; 34. Ejector pin; 35. Angled ejector; 4. Core pulling mechanism; 41. Bent pin; 42. Core pulling slider; 5. Fastening mechanism; 51. First fastening; 511. First fastening fixing block; 512. First fastening connecting block; 513. Insert; 514. Positioning boss; 52. Second fastening; 521. Second fastening fixing block; 522. Second fastening connecting block; 523. Second fastening pressure block; 53. Fastening spring tongue; 531. Spring tongue pressing end; 532. Spring tongue support end. Detailed Implementation

[0024] To provide a further understanding of the purpose, structure, features, and functions of the present invention, detailed descriptions are provided below with reference to specific embodiments.

[0025] like Figures 1 to 11 As shown, the injection molding mold for the anti-backlash and anti-tear surface of the grating outer panel for a dry cleaning machine includes a front mold assembly 1, a rear mold assembly 2, and an ejection mechanism 3. The front mold assembly 1 and the rear mold assembly 2 are configured to open and close. The ejection mechanism 3 is movably connected within the rear mold assembly 2. The injection molding mold for the anti-backlash and anti-tear surface of the grating outer panel for a dry cleaning machine also includes a core-pulling mechanism 4 and a fastening mechanism 5. The core-pulling mechanism 4 is movably connected within the front mold assembly 1. The fastening mechanism 5 is used to connect the mold into a movable whole.

[0026] like Figure 1 , Figure 2 , Figure 3 , Figure 10 and Figure 11 As shown, the front mold assembly 1 includes a panel 11, a backing plate 12, and a fixed template 13. The panel 11 is fixedly connected to the backing plate 12, and the backing plate 12 is movably connected to the fixed template 13 via guide posts. A fixed mold core is provided inside the fixed template 13. A latching spring tongue 53 that cooperates with the first latching mechanism 51 is movably connected to the side wall of the fixed template 13 facing the first latching mechanism 51. The latching spring tongue 53 is a long strip block structure, and an inclined chamfer is provided at the edge of the upper end face of the latching spring tongue 53. The chamfer is used for guidance, so that the latching spring tongue... The head is slowly pressed back to avoid jamming caused by sudden pressing back. The chamfer makes the upper end of the latching tongue 53 form the latching tongue pressing end 531, and the lower end of the latching tongue 53 is a flat horizontal surface, i.e., the latching tongue support end 532. Specifically, the latching tongue 53 is connected to the groove opened in the side wall of the fixed template 13 by an elastic element. One end of the elastic element is connected to the back of the latching tongue 53, and the other end is connected to the inner wall of the groove in the side wall of the fixed template 13, so that the latching tongue 53 is elastically connected in the groove. Preferably, the elastic element is a spring.

[0027] like Figure 1 , Figure 2 and Figure 3 As shown, the rear mold assembly 2 includes a base plate 21, a square iron 22, and a moving template 23. The base plate 21 is fixedly connected to the square iron 22, the square iron 22 is fixedly connected to the moving template 23, and a moving mold core is provided inside the moving template.

[0028] like Figure 1 , Figure 3 , Figure 6 and Figure 9 As shown, the ejection mechanism 3 includes a first lower ejector plate 31, a second lower ejector plate 32, and an upper ejector plate 33. The first lower ejector plate 31 and the second lower ejector plate 32 are fixedly connected together to form a lower ejector plate assembly. The lower ejector plate assembly is movably connected to the upper ejector plate 33 by equidistant screws. The equidistant screws create a gap between the upper ejector plate 33 and the lower ejector plate assembly, and the gap distance is the ejection distance during the second stage of ejection. Ejector pins 3 are fixedly connected to the first lower ejector plate 31 and the second lower ejector plate 32. 4. The upper ejector plate 33 is fixedly connected to the inclined ejector 35 and the ejection limiting block 331. The ejector plate 33 is movably connected to the side wall facing the second ejector 52, and the ejector spring tongue 53 is in cooperation with the second ejector 52. Specifically, the ejector spring tongue 53 is connected to the groove opened in the side wall of the upper ejector plate 33 by an elastic element. One end of the elastic element is connected to the back of the ejector spring tongue 53, and the other end is connected to the inner wall of the groove in the side wall of the upper ejector plate 33, so that the ejector spring tongue 53 is elastically connected in the groove. Preferably, the elastic element is a spring.

[0029] like Figure 1 , Figure 4 and Figure 5 As shown, the core-pulling mechanism 4 includes a bent pin 41 and a core-pulling slider 42. The front end of the bent pin 41 (the end of the bent pin 41 that is fixedly connected to the panel 11) is fixedly connected to the panel 11, and the rear end of the bent pin 41 (the locking surface of the bent pin 41 that cooperates with the core-pulling slider 42) is inclined and movably connected to the core-pulling slider 42. The inclination angle between the bent pin 41 and the core-pulling slider 42 is adapted to the inclination angle of the groove of the outer plate of the grille. The bent pin 41 is provided with a slider for limiting the stroke of the core-pulling slider 42.

[0030] like Figure 1 , Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11As shown, the fastening mechanism 5 includes a first fastening mechanism 51 and a second fastening mechanism 52. The first fastening mechanism 51 includes a first fastening fixing block 511 and a first fastening connecting block 512. The first fastening fixing block 511 and the first fastening connecting block 512 are both elongated block structures. The first fastening fixing block 511 and the first fastening connecting block 512 are slidably connected. Specifically, the first fastening fixing block 511 has a sliding groove inside that matches the shape and size of the first fastening connecting block 512. The first fastening connecting block 512 is inserted into the sliding groove and slides in cooperation with the first fastening fixing block 511. The first fastening mechanism 51 is located between the moving template 23 and the fixed template 13, and movably connects the moving template 23 and the fixed template 13 together. Specifically, the rear end of the first fastening fixing block 511 is fixedly connected to the outer wall of the moving template 23, and the front end of the first fastening fixing block 511 is unconnected (i.e., not connected to any part). The front end of the first fastening connecting block 512 is fixedly connected to the pad 1. On the outer wall of 2, the rear end of the first buckle connecting block 512 is empty. Since the first buckle fixing block 511 has a sliding groove that matches the first buckle connecting block 512, the first buckle connecting block 512 can be inserted into the sliding groove and form a sliding fit with the first buckle fixing block 511. The first buckle 51 is used to drive the moving template 23 to move the fixed template 13 a core-pulling stroke distance in the early stage of mold opening, so as to realize the core-pulling mechanism 4 disengaging from the product buckle. The second buckle 52 includes a second buckle fixing block 521 and a second buckle connecting block 522. The second buckle fixing block 521 is a long strip block structure, and the second buckle connecting block 522 is a long strip block structure. The second buckle fixing block 521 and the second buckle connecting block 522 are slidably connected. Specifically, the second buckle fixing block 521 has a sliding groove that matches the shape and size of the second buckle connecting block 522. The second buckle connecting block 522 is inserted into the sliding groove and slides with the second buckle fixing block 521.The second fastening mechanism 52 is positioned between the base plate 21 and the moving template 23. The second fastening mechanism 52 fixes the first lower ejector plate 31 and the second lower ejector plate 32 together, and fixes the moving template 23 to the base plate 21 together. Specifically, the front end of the second fastening mechanism fixing block 521 is fixedly connected to the second lower ejector plate 32, and the rear end of the second fastening mechanism fixing block 521 is fixedly connected to the first lower ejector plate 31. Thus, the first lower ejector plate 31 and the second lower ejector plate 32 are fixedly connected together to form a lower ejector plate assembly. Furthermore, the upper surface of the front end of the second fastening mechanism fixing block 521 abuts against the lower bottom surface of the fastening mechanism spring tongue 53, that is, against the spring tongue support end 532. The front end of the second fastening connecting block 522 is fixedly connected to the outer wall of the moving template 23, and the rear end of the second fastening connecting block 522 is fixedly connected to the outer wall of the base plate 21, thereby fixing the moving template 23 and the base plate 21 together. Since the second fastening fixing block 521 has a sliding groove adapted to the second fastening connecting block 522, the second fastening connecting block 522 can be inserted into the sliding groove and slide in cooperation with the second fastening fixing block 521. The second fastening mechanism 52 is used to transmit the force applied by the top roller to the lower ejector plate assembly to the upper ejector plate 33, and simultaneously controls the ejection sequence of the ejector plates in the ejection mechanism 3 during the ejection stage.

[0031] Furthermore, since the outer plate of the molded grid requires a large number of ejector pins 34, in order to hold the ejector pins 34 down and prevent them from falling, this design adds an extra lower ejector plate, namely the second lower ejector plate 32. The first lower ejector plate 31 and the second lower ejector plate 32 clamp the ejector pins 34, so that the ejector pins 34 are fixed between the first lower ejector plate 31 and the second lower ejector plate 32.

[0032] Furthermore, the functional surface of the first buckle fixing block 511 of the first buckle 51 will frequently come into contact with the buckle spring tongue 53, causing the functional surface of the first buckle fixing block 511 to be under constant stress, which can easily lead to functional wear or even damage to the first buckle fixing block 511. Therefore, an insert 513 is provided at the position of the functional surface of the first buckle fixing block 511. The insert 513 is embedded in the groove at the position of the functional surface of the first buckle fixing block 511. The insert 513 is quenched and its hardness must reach HRC52 or higher.

[0033] Furthermore, the first buckle fixing block 511 of the first buckle 51 is fixed to the moving template 23 by screws. The screws are fixed at the base position of the first buckle fixing block 511. To prevent the screws from being subjected to shearing force and causing cracking, a positioning boss 514 is provided at the base position of the first buckle fixing block 511.

[0034] Furthermore, a second latching block 523, adapted to the latching spring 53, is provided at the front end of the second latching connecting block 522. The second latching block 523 and the second latching connecting block 522 are an integral structure. The second latching block 523 is used to press the latching spring 53 into its groove. The specific working process is as follows: since the two ends of the second latching connecting block 522 are fixed and locked and cannot move, during the secondary ejection process, the latching spring 53 set on the second lower ejector plate 32 gradually moves upward with the ejection movement until the spring pressing end 531 contacts the second latching block 523. As the ejection continues, the spring is completely pressed into the groove.

[0035] The working process of the injection molding mold for the anti-tipping and anti-scratching outer grating panel of the dry cleaning machine is as follows: S1. Mold closing and injection molding; S11. Mold closure; Panel 11, fixed template 13, and moving template 23 are in the closed state. The first fastener 51 is in the insertion engagement state, connecting the fixed template 13 and the moving template 23 together. At this time, the core-pulling slider 42 is in the insertion state, used to form the groove on the outer surface of the grating panel.

[0036] S12. Injection molding; Inject plastic to form the outer grating panel.

[0037] S2. First mold opening, machine pulling and core removal; S21. Core pulling; As the mold opens, the moving template 23 drives the fixed template 13 to move through the first snap-fit ​​mechanism 51. At this time, the bent pin 41 is displaced relative to the core-pulling slider 42, and its inclined surface forces the core-pulling slider 42 to slide laterally along the guide groove. During this process, the core-pulling slider 42 gradually disengages from the undercut structure of the product.

[0038] S22. The injection molding machine pulls the rear mold; The injection molding machine pulls the base plate 21, causing the entire rear mold assembly, including the base plate 21, square iron 22, moving platen 23, and ejection mechanism 3, to move backward. At this time, the first clamping mechanism 51 connects the moving platen 23 and the fixed platen 13 together. Under the action of the first clamping mechanism 51, the fixed platen 13 does not immediately separate from the moving platen 23; instead, it is pulled backward along with the moving platen 23. However, the panel 11 remains fixed to the fixed mold side of the injection molding machine.

[0039] S23. Fixed template pop-up; Since the panel 11 remains stationary, the passive template 23 pulls the fixed template 13 backward, causing a gap to appear between the panel and the fixed template 13. The gap distance is the core-pulling stroke set by the fastener 51, preferably 15mm. During this process, the core-pulling slider 42 installed in the front mold base plate 12 slides as the fixed template 13 moves backward until the core-pulling slider 42 is smoothly pulled out from the groove on the outer surface of the product.

[0040] S24. Core extraction complete; The fixed template 13 moves backward until the core-pulling slider 42 is blocked by the limit block on the bent pin 41, the core-pulling mechanism 4 stops running, and the core-pulling slider 42 is disengaged from the product and the inverted design is completed.

[0041] S25. The first latch disengaged; Once the travel is complete, the first latch 51 automatically disengages, and the connection between the moving template 23 and the fixed template 13 is released.

[0042] S3. Second mold opening, the fixed mold plate and the moving mold plate are separated; S31. Secondary mold opening; After the first latch 51 is unlocked, the injection molding machine continues to pull the rear mold to move. At this time, the fixed mold plate 13 loses its connection with the moving mold plate 23 and is locked in place by the guide post on the front mold side.

[0043] S32. Separation of fixed template and moving template; At this time, due to the unlocking of the first latch 51, the moving template 23 and the fixed template 13 are no longer connected. The moving template 23 continues to move backward, while the fixed template 13 remains in place, causing the main parting surface between the fixed template 13 and the moving template 23 to open.

[0044] S33. Fully open; After the injection molding machine finishes moving, the mold opens to the correct position, and the product remains on the moving mold core of the moving platen 23.

[0045] S4. First-stage ejection, sloping ejection detachment; S41. Push-out start; The injection molding machine's ejector roller passes through the KO hole 211, pushing the first lower ejector plate 31 and the second lower ejector plate to begin ejection.

[0046] S42. Ejector plate movement; At this time, since the first lower ejector plate 31 and the second lower ejector plate 32 are fixedly connected to the second fastener 52 to form a lower ejector plate assembly, and the upper surface of the front end of the second fastener fixing block 521 presses against the upper ejector plate 33, the first lower ejector plate 31, the second lower ejector plate 32 and the upper ejector plate 33 are pushed forward as a whole by a preset ejection distance. Preferably, the preset ejection distance is 65mm: that is, the whole assembly moves forward by 65mm. During this process, the ejector pins 34 fixed on the first lower ejector plate 31 and the second lower ejector plate 32 and the inclined ejector pins 35 fixed on the upper ejector plate 33 move forward together. As the inclined ejector pins move forward, due to the angle of the inclined ejector pins, they slide laterally, thereby disengaging from the internal buckle of the product.

[0047] S43. Level 1 in place; After moving the first-stage ejection preset distance, the ejection limit block 331 on the upper surface of the upper ejector plate 33 abuts against the lower bottom surface of the moving template 23, preventing the upper ejector plate 33 from continuing to eject upwards. At this point, the inclined ejector 35 has completely detached from the product's inverted shape. However, the outer frame inside the product still tightly presses against the inclined ejector 35, keeping the product inside the core. Because the outer frame inside the product is pressing against the inclined ejector 35, it is extremely difficult to remove the product from the core. After the first-stage ejection is in place, the upper ejector plate 33 cannot move further due to being stopped by the ejection limit block 331. However, because there is a gap between the upper ejector plate 33 and the lower ejector plate assembly, the first lower ejector plate 31 and the second lower ejector plate 32, as a whole, can still continue to eject under the action of the ejector roller.

[0048] S5. Secondary ejection, product ejection; S51. The top rod continues to push out; The injection molding machine's ejector roller continues to apply thrust, pushing the first lower ejector plate 31 and the second lower ejector plate 32 to continue ejecting.

[0049] S52. The first and second lower ejector plates continue their ejection motion; At this time, since the upper ejector plate 33 is blocked by the ejection limit block 331, only the first lower ejector plate 31 and the second lower ejector plate 32 are ejecting, that is, the ejector 34 continues to eject, and the oblique ejector 35 stops ejecting.

[0050] S53. Secondary ejection distance; Under the action of the ejector roller, the first lower ejector plate 31 and the second lower ejector plate 32 continue to eject until the second lower ejector plate 32 is stopped by the upper ejector plate 33, and the lower ejector plate assembly stops moving. This distance is the secondary ejection distance, which is also the distance between the upper ejector plate 33 and the lower ejector assembly. Furthermore, the secondary ejection distance is greater than the height of the product. Preferably, the preset secondary ejection distance is 20mm. The secondary ejection is accomplished by the ejector pins 34 on the first lower ejector plate 31 and the second lower ejector plate 32. Since the secondary ejection distance is greater than the height of the product, the product is completely pushed away from the core, and the product is suspended on the ejector pins 34 by gravity.

[0051] S54. Pick up the item; The product is completely detached, and the robotic arm removes it.

[0052] S6. Reset; S61. Ejector pin reset; The injection molding machine's ejector roller retracts. The first and second lower ejector plates 31 and 32, which were ejected during the secondary stage, are first reset by the ejector roller. After moving the secondary ejection distance, the first and second lower ejector plates 31 and 32 are reconnected to the upper ejector plate 33 by equidistant screws. Then, the first and second lower ejector plates 31 and 32 drive the upper ejector plate 33 to reset by equidistant screws.

[0053] S62. Mold closing; The injection molding machine pushes the rear mold forward.

[0054] S63. Fixed template reset; The movable template 23 pushes the fixed template 13, causing it to fit against the pad 12. The core-pulling slider 42 returns to its working position as the fixed template 13 resets.

[0055] S64. First fastener reconnected; The moving template 23 and the fixed template 13 are closed in place, and the first fastening connecting block 512 is reconnected to the sliding groove of the first fastening fixing block 511, ready for the next cycle.

[0056] Compared with the prior art, the injection molding mold for the outer grating panel of a dry cleaning machine that prevents damage from backlash has the following advantages: 1. To address the complex structure of the outer grille panel, a smooth core-pulling process is achieved, ensuring the quality of the exterior surface.

[0057] This invention cleverly solves the problem of difficult core pulling caused by the grooved undercut on the outer surface of the grille panel by setting up a first snap-fit ​​mechanism and a core-pulling mechanism. At the initial stage of mold opening, the first snap-fit ​​mechanism drives the moving platen to precisely move the fixed platen by a preset core-pulling stroke, allowing the core-pulling slider installed in the front mold to be smoothly pulled out of the groove on the product's outer surface at the moment of mold opening, before the main parting surface is opened. This timing control method completely avoids the defects such as easy damage to the outer surface caused by traditional rear mold slider core pulling, and defects such as sticking and whitening caused by improper timing coordination of traditional front mold core pulling, significantly improving the product's appearance quality and yield.

[0058] Second, to meet the cleanliness requirements of white parts, a fully mechanical drive is implemented to eliminate oil contamination.

[0059] This invention fully considers the special requirement of zero tolerance for oil stains on the outer panel of the dry cleaning machine's grating, which is a white exterior component. The entire core-pulling action and two-stage ejection action of the mold are completed using a purely mechanical locking mechanism, completely eliminating the hydraulic cylinders commonly used in traditional designs. This design fundamentally eliminates the risk of hydraulic oil leakage and contamination of the mold cavity after long-term use, ensuring the absolute cleanliness of white products during the production process, avoiding batch scrap due to oil stains, and significantly reducing production costs and quality control difficulties.

[0060] Third, to address the difficulties in product demolding and the problem of "parts getting stuck", a two-stage refined ejection system is implemented to ensure smooth part removal.

[0061] This invention constructs a two-stage ejection system by setting up a second clamping mechanism and a three-layer ejector plate structure, effectively solving the problems of high product demolding resistance and "part jamming" after ejection. The first lower ejector plate, the second lower ejector plate, and the upper ejector plate are connected by the second clamping mechanism, jointly ejecting a preset distance for the first stage. During this process, the inclined ejector fixed to the upper ejector plate smoothly slides out from the internal undercut of the product, achieving damage-free demolding of the internal undercut. After the first stage ejection is completed, the upper ejector plate stops moving, while the first and second lower ejector plates continue to eject a second stage distance. This action is completed by the ejector pins fixed to the lower ejector plate assembly, completely pushing the product "jammed" due to uneven force or friction away from the core, making it completely suspended. Through the precise coordination of the above two-stage ejection, this invention not only protects the internal structure of the product from damage, but also completely solves the industry pain point of products being difficult to remove due to ejector pin compression in traditional molds, greatly facilitating automated part removal by robotic arms, and improving production efficiency and product yield.

[0062] The present invention has been described in the above-described embodiments; however, these embodiments are merely examples for implementing the present invention. It must be noted that the disclosed embodiments do not limit the scope of the present invention. Conversely, any modifications and refinements made without departing from the spirit and scope of the present invention are within the scope of patent protection of the present invention.

Claims

1. A mold for injection molding a grating outer panel for a dry cleaning machine to prevent undercutting and scratching of the exterior surface, comprising a front mold assembly (1) and a rear mold assembly (2), wherein the front mold assembly (1) comprises a fixed mold plate (13) and a fixed mold core disposed within the fixed mold plate (13), and the rear mold assembly (2) comprises a movable mold plate (23), a movable mold core disposed within the movable mold plate (23), and an ejection mechanism (3) for ejecting the molded product from the mold cavity, wherein the fixed mold plate (13) and the movable mold plate (23) are configured to open and close in a mutually engaging manner, characterized in that: The mold is provided with a core-pulling mechanism (4) for forming the grid holes of the product undercut. The core-pulling mechanism (4) is movably connected in the fixed template (13). The mold is also provided with a locking mechanism (5) for controlling the mold opening sequence. The locking mechanism (5) includes a first locking mechanism (51) and a second locking mechanism (52). The first locking mechanism (51) is set between the moving template (23) and the fixed template (13) and movably connects the moving template (23) and the fixed template (13) together. The second locking mechanism (52) is set between the moving template (23) and the base plate (21). The second locking mechanism (52) movably connects the upper ejector plate (33) and the lower ejector plate assembly together. The ejection mechanism (3) includes a lower ejector plate assembly and an upper ejector plate (33). The lower ejector plate assembly and the upper ejector plate (33) are movably connected through the second locking mechanism (52). The lower ejector plate assembly is fixedly connected to the ejector pin (34), and the upper ejector plate (33) is fixedly connected to the inclined ejector (35).

2. The injection molding mold for the anti-backlashing and tearing outer surface of the grille for a dry cleaning machine as described in claim 1, characterized in that: The front mold assembly (1) includes a panel (11), a pad (12) and a fixed template (13). The panel (11) is fixedly connected to the pad (12), and the pad (12) is movably connected to the fixed template (13) through guide posts. The fixed template (13) is provided with a fixed mold core.

3. The injection molding mold for the anti-backlashing and tearing outer surface of the grating outer panel for a dry cleaning machine as described in claim 1, characterized in that: The rear mold assembly (2) includes a base plate (21), a square iron (22) and a moving template (23). The base plate (21) is fixedly connected to the square iron (22), and the square iron (22) is fixedly connected to the moving template (23). The moving template is provided with a moving mold core.

4. The injection molding mold for the anti-scratching and anti-damaging outer surface of the grille panel for a dry cleaning machine as described in claim 1, characterized in that: The ejection mechanism (3) includes a first lower ejector plate (31), a second lower ejector plate (32), and an upper ejector plate (33). The first lower ejector plate (31) and the second lower ejector plate (32) are fixedly connected together to form a lower ejector plate group. The lower ejector plate group is movably connected to the upper ejector plate (33) through a fastening mechanism (5). Ejector pins (34) are fixedly connected to the first lower ejector plate (31) and the second lower ejector plate (32). An inclined ejector (35) and an ejection limiting block (331) are fixedly connected to the upper ejector plate.

5. The injection molding mold for the anti-backlashing and anti-scratching outer surface of the grating panel for a dry cleaning machine as described in claim 1, characterized in that: The core-pulling mechanism (4) includes a bent pin (41) and a core-pulling slider (42). The front end of the bent pin (41) is fixedly connected to the panel (11), and the rear end of the bent pin (41) is inclined and movably connected to the core-pulling slider (42). The inclination angle between the bent pin (41) and the core-pulling slider (42) is adapted to the inclination angle of the groove of the outer plate of the grille.

6. The injection molding mold for the anti-scratching and anti-damaging outer surface of the grating panel for a dry cleaning machine as described in claim 1, characterized in that: The fastening mechanism (5) includes a first fastening mechanism (51) and a second fastening mechanism (52). The first fastening mechanism (51) includes a first fastening fixing block (511) and a first fastening connecting block (512). The first fastening fixing block (511) and the first fastening connecting block (512) are movably connected. The first fastening mechanism (51) is located between the moving template (23) and the fixed template (13) and movably connects the moving template (23) and the fixed template (13) together. The second fastening mechanism (52) includes... Includes a second fastener fixing block (521) and a second fastener connecting block (522). The second fastener fixing block (521) and the second fastener connecting block (522) are movably connected. The second fastener (52) is set between the moving template (23) and the base plate (21). The second fastener (52) fixes the first lower ejector plate (31) and the second lower ejector plate (32) together, and movably connects the upper ejector plate (33) with the first lower ejector plate (31) and the second lower ejector plate (32).

7. The injection molding mold for the anti-backlashing and tearing outer surface of the grating outer panel for a dry cleaning machine as described in claim 6, characterized in that: An insert (513) is provided at the functional surface position of the first fastener fixing block (511). The insert (513) is embedded in the groove at the functional surface position of the first fastener fixing block (511). The insert (513) is quenched and its hardness is required to reach HRC52.

8. The injection molding mold for the anti-backlashing and tearing outer surface of the grating outer panel for a dry cleaning machine as described in claim 6, characterized in that: A positioning boss (514) is provided at the base position of the first fastener fixing block (511), and the positioning boss (514) and the first fastener fixing block (511) are an integrated structure.

9. The injection molding mold for the anti-scratching and anti-damaging outer surface of the grille for a dry cleaning machine as described in claim 4, characterized in that: The fixed template (13) is movably connected to the side wall facing the first fastener (51) with a fastener spring tongue (53) that cooperates with the first fastener (51); the upper ejector plate (33) is movably connected to the side wall facing the second fastener (52) with a fastener spring tongue (53) that cooperates with the second fastener (52).

10. The injection molding mold for the anti-backlashing and tearing outer surface of the grating outer panel for a dry cleaning machine as described in claim 6, characterized in that: The second buckle link block (522) has a second buckle pressing block (523) at the front end that is compatible with the buckle spring tongue (53). The second buckle pressing block (523) and the second buckle link block (522) are an integrated structure.

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