Stacked injection mold, automatic part taking device, and multi-specification product molding apparatus

Abstract

This utility model provides a stacked injection mold, an automatic part-removing device, and a multi-specification product molding equipment. The stacked injection mold includes a first mold, a second mold, and a two-stage hot runner system. A first anti-overflow sleeve is fitted around the gate of the first main runner section, and a second anti-overflow sleeve is fitted around the gate of the second main runner section. The first and second anti-overflow sleeves have facing first and second mating surfaces. When the first mold is closed, the first and second mating surfaces fit tightly together to form a sealed interface. The automatic part-removing device includes a first suction plate and a second suction plate, each corresponding to a first cavity in the first mold and a second cavity in the second mold, respectively. This invention solves the problems of low efficiency, high cost, poor consistency, and high risk of mixed parts in the production of multi-specification micro-products.

Description

Technical Field

[0001] This utility model relates to the field of injection molding technology, specifically to a stacked injection mold, an automatic part removal device for the stacked injection mold, and a multi-specification product molding equipment including the stacked injection mold and the automatic part removal device. Background Technology

[0002] In the field of low-pressure injection molding, to improve production efficiency and reduce unit product costs, the number of mold cavities has gradually expanded from 8 or 16 cavities to 32 or even 64 cavities. For two products of the same type but different shapes, especially when the two products are paired products (such as two mating parts of a lock), the current mainstream production method still relies on the "one machine, one product" or "dual machine, dual mold" production model: that is, each product is equipped with a separate mold and injection molding machine, or produced separately by two parallel machines, and then sorted and packaged manually or by a separate robot. This model not only requires large equipment investment, occupies a large space, and consumes a lot of energy, but also, due to slight differences in the process parameters (such as temperature, pressure, and cooling time) of the two sets of molds, batch inconsistencies occur in key properties such as color, size, and crystallinity of the two products, making it difficult to meet the stringent consistency requirements of precision assembly.

[0003] Furthermore, as the number of cavities in a mold increases, the overall size of the mold and the required clamping force rise significantly, forcing manufacturers to choose injection molding machines with larger tonnage. The screw capacity of these large-tonnage injection molding machines increases accordingly. However, when producing small product parts, these large injection molding machines suffer from a serious mismatch between capacity and demand. This is because the increased size requirements of the injection molding machine due to the increased number of cavities contradict the demand for screw capacity based on the amount of material used in the product. Especially when molding small products using heat-sensitive materials (e.g., two products with net weights of 0.1g and 0.11g respectively), the molten material in the screw is consumed very slowly during a full-cavity production cycle. This significantly prolongs the material's residence time in the screw. For heat-sensitive engineering plastics such as PA6, thermal degradation easily occurs in the high-temperature screw, affecting the material's molecular chain structure and leading to quality problems such as decreased mechanical properties, increased appearance defects (e.g., black spots, air bubbles), and reduced yield after molding.

[0004] Although stacked mold technology has enabled simultaneous multi-cavity molding within a single machine, significantly improving unit equipment capacity, many shortcomings still exist. For example, during mold closing, the main gates at the ends of the upper and lower hot runners are prone to failure to achieve stable and reliable dynamic sealing due to thermal expansion, assembly tolerances, and mold closing misalignment. High-temperature melt is highly susceptible to leakage from the interface between the two hot runners under high-pressure injection conditions, causing overflow at the gate, carbon buildup in the runners, product shortages, and even mold damage, severely disrupting continuous production and resulting in persistently low yield rates.

[0005] Furthermore, improvements to existing molding equipment generally stop at the integration of the "molding stage," failing to form a closed-loop linkage with subsequent part removal and sorting processes. Especially when dealing with multiple injection-molded products of different structures, lightweight and easily dispersed dimensions, existing part removal methods either suffer from poor matching between the fixture layout and the mold cavity position, or rely on unstructured mechanical movements. This often leads to parts splashing, bouncing, or becoming stuck in the gap between the mold cavity and the ejection mechanism after ejection due to their lightweight nature, causing mold jamming, ejection failure, or even mold damage. More seriously, mixed material discharge results in mixed products, making it impossible to trace back to the specific mold cavity. This makes it difficult to pinpoint the root cause of defects such as material shortages, flash, and weld lines during production, resulting in a loss of process monitoring and quality feedback capabilities. Therefore, there is an urgent need for an automated part removal mechanism with a simple structure, high mold compatibility, and precise sorting, providing an effective solution for the highly reliable, efficient, and unmanned production of micro-precision injection molded parts.

[0006] Therefore, there is an urgent need for a truly integrated multi-specification product molding equipment that not only achieves simultaneous injection of two products at the molding end through a stacked structure, but also achieves zero leakage and high stability conveying of the melt under high pressure, high temperature, and high frequency conditions without increasing system complexity. Furthermore, through the mechanical linkage design of the mold and the part-picking device, it can achieve automatic separation, contactless sorting, and precise delivery of products and material heads, in order to solve the problems of low efficiency, high cost, poor consistency, and high risk of mixed parts in the production of multi-specification micro products in existing technologies.

[0007] This utility model was proposed to address these problems, and its specific technical solutions and the technical problems it solves will be described in detail in the following sections. Utility Model Content

[0008] The present disclosure aims to provide a multi-specification product molding equipment to overcome the systemic defects in the prior art, such as unreliable sealing of hot runners in stacked molds, disconnection between molding and sorting processes leading to overflow degradation, high risk of mixed parts, unstable yield, and lack of quality traceability.

[0009] One objective of this disclosure is to provide a stacked injection mold that solves the technical problem that melt leakage easily occurs at the interface of the hot runner of existing stacked molds under high temperature and high pressure.

[0010] Another objective of this disclosure is to provide an automatic part-grabbing device for stacked injection molds, enabling simultaneous and precise grabbing and sorting of multiple parts and material heads.

[0011] Another objective of this disclosure is to provide a multi-specification product forming equipment to solve the technical problems of disconnect between the forming and sorting processes of multi-specification products, lack of quality traceability, and poor consistency in the prior art.

[0012] According to a first aspect of this disclosure, a stacked injection mold is provided, comprising a first mold including a plurality of first cavities disposed on a first moving mold, and a second mold including a plurality of second cavities disposed on a second moving mold, wherein the first mold and the second mold are stacked in a filling direction, the first mold is located upstream of the second mold, and a hot runner plate is disposed between the first mold and the second mold; further comprising a two-stage hot runner system, the two-stage hot runner system including a main hot runner extending from the inlet along the filling direction to the hot runner plate and a plurality of first branch runners and a plurality of second branch runners branching from the downstream end of the main hot runner located in the hot runner plate, wherein the main hot runner includes a first main runner section and a second main runner section divided by the parting surface of the first mold, the downstream end of the first main runner section having a first main gate, and the upstream end of the second main runner section having a second main gate, the first main gate and the second main gate being arranged opposite to each other; the plurality of first branch runners are fluidly connected to the plurality of first cavities, and the plurality of second branch runners are fluidly connected to the plurality of second cavities.

[0013] Specifically, a first anti-overflow sleeve is provided outside the first main gate of the first main runner section, and a second anti-overflow sleeve is provided outside the second main gate of the second main runner section; the first anti-overflow sleeve has a first mating surface facing the second anti-overflow sleeve, and the second anti-overflow sleeve has a second mating surface facing the first anti-overflow sleeve; and when the first mold is closed, the first mating surface and the second mating surface fit tightly together to form a sealed interface.

[0014] Specifically, the first opening of the first anti-overflow sleeve is located on the axial outside of the first main gate; the second opening of the second anti-overflow sleeve is located on the axial outside of the second main gate, wherein the first opening and the second opening are axially aligned and are connected to each other when the first mold is closed.

[0015] This disclosure provides anti-overflow sleeves at the ends of the first and second main runner sections, and forms a high-precision sealing interface between the mating surfaces of the two sleeves when the mold is closed. Dynamic sealing is achieved through the surface contact of the rigid structure, eliminating the need for sealing rings or external air pressure. This fundamentally eliminates the risk of material overflow at the hot runner joint, ensuring material integrity and stable product quality.

[0016] Furthermore, the first overflow protection sleeve is provided with a first cooling water channel inside, the first cooling water channel at least partially surrounds the first main gate in the circumferential direction; and the second overflow protection sleeve is provided with a second cooling water channel inside, the second cooling water channel at least partially surrounds the second main gate in the circumferential direction.

[0017] By arranging cooling water channels, the temperature of the area near the mating surface of the sheath can be reduced when the hot runner is working. This reduces the thermal deformation of the sheath to ensure the sealing effect of the mating interface, and also helps the internal residual material to cool and solidify quickly, so as to facilitate the removal and cleaning of the residue.

[0018] Preferably, one of the first mating surface and the second mating surface has a protrusion, and the other has a groove that matches the shape of the protrusion. The shape matching of the two further enhances the sealing performance of the sealing interface S.

[0019] Optionally, the first mold cavity and the second mold cavity are configured to mold first products and second products of different specifications, respectively.

[0020] Preferably, each first mold cavity and each second mold cavity adopts a modular structure that can be independently disassembled and assembled. This reduces the risk of the entire mold set being scrapped due to a malfunction in a single mold cavity, and also reduces maintenance costs and downtime. At the same time, the modular design helps to maintain consistent machining accuracy and facilitates spare parts production and inventory management.

[0021] Preferably, the stacked injection mold includes multiple runner temperature control components, each runner temperature control component includes a temperature measuring element and a heating element, the heating element provides heating according to the measured value of the temperature measuring element, and the multiple runner temperature control components are respectively arranged at the gate of the first main gate, the second main gate, and the gate of each first sub-runner and each second sub-runner.

[0022] By independently monitoring and adjusting the temperature near each gate, local temperatures that are too low or too high due to differences in runner length, cooling effects, or uneven material flow can be avoided. This helps to bring the melt temperature of each gate closer together and improves the filling consistency of all (64 cavities in this example). This control method does not rely on a complex overall temperature control system, but only makes local adjustments to key points. It is simple to operate, has a direct response, and is suitable for use on ordinary injection molding machines.

[0023] According to a second aspect of this disclosure, an automatic part-removing device for the aforementioned stacked injection mold is also provided. The automatic part-removing device includes: a first control arm and a second control arm, both configured to be movable in a horizontal plane and extendable in a vertical direction; a first suction plate rotatably connected to the lower end of the first control arm, and a plurality of first suction cups are provided on the working surface of the first suction plate, the arrangement of the plurality of first suction cups corresponding one-to-one with the arrangement of a plurality of first cavities on a first moving mold; and a second suction plate rotatably connected to the lower end of the second control arm, and a plurality of second suction cups are provided on the working surface of the second suction plate, the arrangement of the plurality of second suction cups corresponding one-to-one with the arrangement of a plurality of second cavities on a second moving mold.

[0024] Furthermore, under the control of the first control arm, the first suction plate can be moved to a first position for absorbing products and a second position for sorting products. In the first position, the first suction plate is located between the first moving mold and the first fixed mold of the first mold, and is positioned such that the plurality of first suction cups are respectively aligned with the plurality of first mold cavities. In the second position, the first suction plate is moved away from the first mold, and is positioned such that the plurality of first suction cups are respectively aligned with the openings of the plurality of first sorting containers. Correspondingly, under the control of the second control arm, the second suction plate can be moved to a third position for absorbing products and a fourth position for sorting products. In the third position, the second suction plate is located between the second moving mold and the second fixed mold of the second mold, and is positioned such that the plurality of second suction cups are respectively aligned with the plurality of second mold cavities. In the fourth position, the second suction plate is moved away from the second mold, and is positioned such that the plurality of second suction cups are respectively aligned with the openings of the plurality of second sorting containers.

[0025] Since each suction cup is matched with the corresponding mold cavity position, and each sorting container is also arranged according to the mold cavity arrangement, the products produced by each mold cavity can be accurately picked up by the corresponding suction cup without misalignment or missed suction; after the suction cup moves, the products are directly placed into the designated container and will not be mixed with other products; no manual sorting or additional conveying and identification systems are required, reducing the risk of mixing and the workload of post-processing.

[0026] Preferably, a plurality of first material head clamping members are further installed on the working surface of the first suction plate. The plurality of first material head clamping members are arranged such that when the first suction plate is in the first position, the plurality of first material head clamping members are respectively aligned with the material heads formed by the plurality of first flow channels. Correspondingly, a plurality of second material head clamping members are further installed on the working surface of the second suction plate. The plurality of second material head clamping members are arranged such that when the second suction plate is in the third position, the plurality of second material head clamping members are respectively aligned with the material heads formed by the plurality of second flow channels.

[0027] By arranging each first suction cup and the first mold cavity, each second suction cup and the second mold cavity, each first sprue holder and the first runner outlet, and each second sprue holder and the second runner outlet according to spatial geometry, it is ensured that after mold opening, the robot can synchronously and accurately capture each product and its corresponding sprue, eliminating the risk of product splashing and in-mold jamming.

[0028] According to a third aspect of this disclosure, a multi-specification product molding equipment is also provided, including a stacked injection mold as described in the first aspect above and an automatic part removal device as described in the second aspect above.

[0029] This disclosure provides a stacked injection mold with improved sealing performance, processing stability, product consistency, and application flexibility through the above aspects. It effectively saves product processing costs, reduces the requirements for equipment performance and space, and by providing an automatic part-removal device that is highly compatible with the stacked injection mold, it not only improves sorting efficiency but also eliminates the risks of product splashing and in-mold jamming. It achieves cavity-level binding of production, sorting, and storage, providing a traceable data foundation for subsequent online sampling inspection, defect tracing, mold condition diagnosis, and process parameter optimization. It improves the accuracy and reliability of quality process control, thus obtaining a solution for multi-specification product molding equipment that is significantly superior to existing designs. Attached Figure Description

[0030] The features and advantages of one or more embodiments of the present invention will become more readily apparent from the following description with reference to the accompanying drawings. The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the invention in any way. The drawings are not drawn to scale and some features may be enlarged or reduced to show details of specific components. In the drawings:

[0031] Figure 1 A cross-sectional schematic diagram of a stacked injection mold according to an embodiment of the present disclosure is shown;

[0032] Figure 2 A perspective view of a two-stage hot runner system in a stacked injection mold according to an embodiment of the present disclosure is shown.

[0033] Figure 3 It shows Figure 1 Detailed sectional view of section C; and

[0034] Figure 4 A perspective view of the automatic item retrieval device according to the present disclosure in the item retrieval state is shown.

[0035] Explanation of icon numbers:

[0036] Detailed Implementation

[0037] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0038] It should be noted that the terminology used herein is for the purpose of describing particular implementations only and is not intended to limit the exemplary implementations according to this disclosure. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise.

[0039] Figure 1 A cross-sectional schematic diagram of a stacked injection mold according to an embodiment of the present disclosure is shown, wherein individual structures of the runner system are shown only schematically in their outer contours to clearly show the shape of the main structure.

[0040] like Figure 1 As shown, the stacked injection mold 1 according to this disclosure mainly includes: a first mold, a second mold, and a two-stage hot runner system. The first mold and the second mold are stacked in the filling direction F of the hot runner system, wherein the first mold is located on the upstream side in the filling direction F, and the second mold is located on the downstream side in the filling direction F. In this document, "upstream" and "downstream" are merely temporary terms used to indicate orientation with reference to the filling direction F to describe the positional relationship. "Filling direction" refers to the direction in which the molten material fills the mold along the main runner. These terms are for descriptive convenience only and are not specific or fixed limiting terms.

[0041] The first mold mainly includes a first B plate 6 with a first moving mold 25, a first A plate 9 with a first fixed mold 26, and a first ejection mechanism. Multiple first mold cavities 25a are arranged in an orderly manner on the first moving mold 25. In the example of this application, there are 32 first mold cavities 25a, arranged in an 8×4 layout in four groups on the first moving mold 25, for molding 32 first products A in one operation.

[0042] The second mold mainly includes a second A plate 12 with a second fixed mold 34, a second B plate 14 with a second moving mold 35, and a second ejection mechanism. Multiple second mold cavities 35a are arranged in an orderly manner on the second moving mold 35. In the example of this application, the number of second mold cavities 35a is also 32, arranged in an 8×4 layout in four groups on the second moving mold 35, for one-time molding of 32 second products B.

[0043] Between the first mold and the second mold, specifically between the first A plate 9 and the second A plate 12, a runner plate 11 is provided, thereby forming a cavity for accommodating the hot runner plate 31.

[0044] The two-stage hot runner system includes a main hot runner extending from the inlet through the first mold to the hot runner plate 31, and a plurality of first branch runners 30 and a plurality of second branch runners 32 branching from the ends of the main hot runner located in the hot runner plate 31. The plurality of first branch runners 30 are fluidly connected to the aforementioned plurality of first mold cavities 25a, and the plurality of second branch runners 32 are fluidly connected to the aforementioned plurality of second mold cavities 35a. In this example, since both the first mold cavities 25a and the second mold cavities 35a are divided into four groups, four first branch runners 30 and four second branch runners 32 are provided to respectively pour into one group (eight) of mold cavities.

[0045] Specifically, such as Figure 1 As shown, the main hot runner includes a first main runner section 21 and a second main runner section 29 that are joined together in the axial direction (parallel to the filling direction F), and the first main runner section 21 and the second main runner section 29 are located on both sides of the parting surface of the first mold (defined by the mating surface of the first moving mold 25 and the first fixed mold 26).

[0046] Furthermore, the downstream end of the first main runner section 21 has a first main gate 22, and the upstream end of the second main runner section 29 has a second main gate 23. The first main gate 22 and the second main gate 23 are arranged opposite to each other to transport molten material during the injection molding process.

[0047] In particular, in embodiments according to this disclosure, see Figures 1 to 3 ( Figure 3 (A cross-sectional schematic diagram of the mating area is shown more clearly). A first overflow sleeve 24 is fitted outside the first main gate 22 of the first main runner section 21, and a second overflow sleeve 27 is fitted outside the second main gate 23 of the second main runner section 29. The first overflow sleeve 24 has a first mating surface facing the second overflow sleeve 27, and the second overflow sleeve 27 has a second mating surface facing the first overflow sleeve 24. When the first mold is closed, the first mating surface and the second mating surface fit tightly together to form a sealing interface S.

[0048] More specifically, the first sleeve opening 24a of the first anti-overflow sleeve 24 is located on the axial outer side of the first main gate 22, and the second sleeve opening 27a of the second anti-overflow sleeve 27 is located on the axial outer side of the second main gate 23. The first sleeve opening 24a and the second sleeve opening 27a are axially aligned. When the first mold is closed, the first anti-overflow sleeve 24 and the second anti-overflow sleeve 27 are tightly fitted together, and the first sleeve opening 24a and the second sleeve opening 27a are seamlessly connected to each other.

[0049] This disclosure provides anti-overflow sleeves at the ends of the first and second main runner sections, and forms a high-precision sealing interface between the mating surfaces of the two sleeves when the mold is closed. Dynamic sealing is achieved through the surface contact of the rigid structure, eliminating the need for sealing rings or external air pressure. This fundamentally eliminates the risk of material overflow at the hot runner joint, ensuring material integrity and stable product quality.

[0050] The aforementioned anti-spill sleeve can be integrated with the proper design of the injection molding process to achieve better anti-spill performance. For example, see... Figure 3 A first valve needle 21a is provided in the first main runner section 21, and a second valve needle 29a is provided in the second main runner section 29. The first valve needle 21a and the second valve needle 29a can move axially under the action of the first air valve 20 and the second air valve 33, respectively, to open or block the corresponding main gate. The first air valve 20 and the second air valve 33 are controlled by a controller and operate in a predetermined sequence. As an example, at the beginning of the filling process, the first air valve 20 operates first, causing the first valve needle 21a to retract axially to open the first main gate 22. Then, the second air valve 33 operates next, causing the second valve needle 29a to retract axially to open the second main gate 23. After the filling process is completed, the second air valve 33 operates first, causing the second valve needle 29a to move axially forward to close the second main gate 23. Then, the first air valve 20 operates again, causing the first valve needle 21a to block the first main gate 22 axially. This sequential timing control effectively prevents pressure buildup at the parting surface caused by premature closure of the first main channel section 21, thereby alleviating the resulting material overflow problem.

[0051] More specifically, see Figure 3 The first overflow protection sleeve 24 is internally provided with a first cooling water channel 24b ( Figure 3 (Only a partial cross-section is shown in the image) The first cooling water passage 24b at least partially surrounds the first main gate 22 in the circumferential direction; the second overflow sleeve 27 is provided with a second cooling water passage 27b inside, which at least partially surrounds the second main gate 23 in the circumferential direction.

[0052] By setting up circumferential cooling water channels around the main gate inside the first and second anti-overflow sleeves, the temperature of the area near the mating surface of the sleeve can be reduced when the hot runner is working. This can reduce the thermal deformation of the sleeve to ensure the sealing effect of the mating interface, and at the same time help the internal residual material to cool and solidify quickly, so as to facilitate the removal and cleaning of the residue.

[0053] As a preferred embodiment, see [link to preferred embodiment]. Figure 3 One of the first mating surface and the second mating surface may be provided with a raised feature, while the other is provided with a recessed feature that precisely matches the raised feature. The shape matching of the two further enhances the sealing performance of the sealing interface S.

[0054] In this example, the first mold cavity 25a and the second mold cavity 35a are configured to mold a first product A and a second product B of different specifications, respectively. The weight difference between the first product A and the second product B does not exceed 15% of the weight of a single product, preferably not exceeding 10%.

[0055] Preferably, each first mold cavity 25a and each second mold cavity 35a adopts a modular structure that can be independently disassembled and assembled. When a mold cavity becomes worn, clogged, or damaged due to long-term use, the corresponding module can be removed individually for replacement or repair without replacing the entire mold layer or requiring a major overhaul. This reduces the risk of the entire mold set being scrapped due to an abnormality in a single mold cavity, and also reduces maintenance costs and downtime. At the same time, the modular design helps to unify machining accuracy and facilitates spare parts production and inventory management.

[0056] Furthermore, the stacked injection mold 1 according to this disclosure also includes multiple runner temperature control components, each of which consists of a temperature measuring element and a heating element. The heating element can provide single-point heating based on the measured value of the temperature measuring element. These runner temperature control components are respectively arranged at the gates of the first main gate 22, the second main gate 23, and each first branch runner 30 and each second branch runner 32.

[0057] By independently monitoring and adjusting the temperature near each gate, localized temperature fluctuations caused by differences in runner length, cooling effects, or uneven material flow can be avoided. During simultaneous injection molding of multiple cavities, this helps to bring the melt temperatures of each gate closer together, improving the filling consistency of all cavities (64 in this example). If a gate experiences slight carbon buildup or minor runner blockage during use, normal injection molding can be maintained by slightly increasing the heating power, extending the maintenance cycle. This control method does not rely on a complex overall temperature control system; it only makes local adjustments at key points, is simple to operate, and has a direct response, making it suitable for use on ordinary injection molding machines.

[0058] According to another aspect of this disclosure, an automatic part-removing device 40 suitable for application to the aforementioned stacked injection mold 1 is also provided. The automatic part-removing device 40 includes a first robot arm for a first mold and a second robot arm for a second mold.

[0059] See Figure 4 The first robotic arm mainly includes a first control arm 41 and a first suction plate 43. The first control arm 41 is configured to move in the horizontal plane and extend and retract in the vertical direction. Figure 4 (Only the end of the control arm is shown in the figure); the first suction plate 43 is rotatably connected to the lower end of the first control arm 41, and a plurality of first suction cups 45 are provided on the working surface of the first suction plate 43. The arrangement of these first suction cups 45 corresponds one-to-one with the arrangement of the plurality of first mold cavities 25a on the first moving mold 25.

[0060] Similarly, the second robotic arm mainly includes a second control arm 42 and a second suction plate 44. The second control arm 42 is also configured to move horizontally and extend vertically. Figure 4 (Only the end of the control arm is shown in the figure); the second suction plate 44 is rotatably connected to the lower end of the second control arm 42, and a plurality of second suction cups 46 are provided on the working surface of the second suction plate 44. The arrangement of these second suction cups 46 corresponds one-to-one with the arrangement of the plurality of second mold cavities 35a on the second moving mold 35.

[0061] The first suction plate 43 and the second suction plate 44 can be moved or rotated to multiple different positions under the control of the corresponding control arms.

[0062] At least, the first suction plate 43 has a first position for picking up articles and a second position for sorting articles. In the first position, the first suction plate 43 is located between the first moving mold 25 and the first fixed mold 26 of the first mold, and is positioned such that each first suction cup 45 is aligned with each first mold cavity 25a. In the second position, the first suction plate 43 is located away from the first mold, and is positioned such that each first suction cup 45 is aligned with the opening of each first sorting container. Preferably, the arrangement of the first sorting containers also corresponds one-to-one with the arrangement of the first mold cavities 25a.

[0063] Correspondingly, the second suction plate 44 has a third position for picking up products and a fourth position for sorting products. In the third position, the second suction plate 44 is located between the second moving mold 35 and the second fixed mold 34 of the second mold, and is positioned such that the plurality of second suction cups 46 are aligned with the plurality of second mold cavities 35a respectively. In the fourth position, the second suction plate 44 is away from the second mold, and is positioned such that each second suction cup 46 is aligned with the opening of each second sorting container respectively. Preferably, the arrangement of the second sorting containers also corresponds one-to-one with the arrangement of the second mold cavities 35a.

[0064] With the above configuration, when the first suction plate 43 and the second suction plate 44 are in the "suction position", the suction cups can be aligned with each cavity of the mold to directly suction each product one-to-one after ejection; when in the "sorting position", the suction plate moves away from the mold to the sorting station, the suction cups are aligned with the corresponding sorting container below, and each product is placed into the designated sorting container.

[0065] Since each suction cup is matched with the corresponding mold cavity position, and each sorting container is also arranged according to the mold cavity arrangement, the products produced by each mold cavity can be accurately picked up by the corresponding suction cup without misalignment or missed suction; after the suction cup moves, the products are directly placed into the designated container and will not be mixed with other products; no manual sorting or additional conveying and identification systems are required, reducing the risk of mixing and the workload of post-processing.

[0066] More preferably, the first suction plate 43 is also equipped with a plurality of first material head clamping members (not shown), which are arranged such that when the first suction plate 43 is in the first position, the plurality of first material head clamping members are respectively aligned with the material heads formed by the plurality of first diversion channels 30, thereby realizing the picking of the material heads and the separation of the material heads from the products; similarly, the second suction plate 44 is also equipped with a plurality of second material head clamping members (not shown), which are arranged such that when the second suction plate 44 is in the third position, the plurality of second material head clamping members are respectively aligned with the material heads formed by the plurality of second diversion channels 32, thereby realizing the picking of the material heads and the separation of the material heads from the products.

[0067] According to the automatic part-retrieving device disclosed herein, by arranging each first suction cup with the first mold cavity, each second suction cup with the second mold cavity, each first material head clamping component with the first runner outlet, and each second material head clamping component with the second runner outlet according to spatial geometry, it is ensured that after mold opening, the robot arm can synchronously and accurately capture each product and its corresponding material head, eliminating the risk of product splashing and in-mold jamming. Simultaneously, since each product is independently adsorbed and directly placed into a dedicated sorting container that strictly corresponds to its forming mold cavity position, mold cavity-level binding is achieved for production-sorting-storage. This provides a traceable data foundation for subsequent online sampling inspection, defect tracing, mold status diagnosis, and process parameter optimization, improving the accuracy and reliability of quality process control.

[0068] According to another aspect of this disclosure, a multi-specification product molding equipment is provided, including the aforementioned stacked injection mold 1 and the aforementioned automatic part removal device 40, wherein the stacked injection mold 1 is used to simultaneously mold multiple first products A and multiple second products B, the first products A and the second products B may have the same or different specifications.

[0069] Although the above description uses a double-layer stacked mold with 32+32 cavities as an example, it should be understood that the technical solution provided in this disclosure can be adapted to stacked molds with different numbers of cavities and stacks, and can achieve any of the effects mentioned above. Accordingly, the automatic part removal device can also be modified accordingly.

[0070] In summary, this disclosure provides a stacked injection mold with improved sealing performance, processing stability, product consistency, and application flexibility through the above aspects. It effectively saves product processing costs, reduces the requirements for equipment performance and space, and by providing an automatic part-removal device that is highly compatible with the stacked injection mold, it not only improves sorting efficiency but also eliminates the risks of product splashing and in-mold jamming. It achieves cavity-level binding of production, sorting, and storage, providing a traceable data foundation for subsequent online sampling inspection, defect tracing, mold condition diagnosis, and process parameter optimization. This improves the accuracy and reliability of quality process control, and thus provides a solution for multi-specification product molding equipment that is significantly superior to existing designs.

[0071] The various embodiments and variations of this utility model have been described in detail above. However, those skilled in the art should understand that this utility model is not limited to the specific embodiments and variations described above, but may include various other possible combinations and arrangements. Other variations and modifications can be implemented by those skilled in the art without departing from the spirit and scope of this utility model. All these variations and modifications fall within the scope of this utility model. Moreover, all components described herein can be replaced by other technically equivalent components.

Claims

1. A stacked injection mold, characterized in that, include: A first mold, the first mold comprising a plurality of first mold cavities (25a) disposed on a first moving mold (25); and The second mold includes a plurality of second mold cavities (35a) disposed on the second moving mold (35); The first mold and the second mold are stacked in the filling direction (F), the first mold is located on the upstream side relative to the second mold, and a hot runner plate (31) is provided between the first mold and the second mold. The stacked injection mold (1) also includes a two-stage hot runner system, which includes a main hot runner extending from the inlet along the filling direction (F) to the hot runner plate (31) and a plurality of first branch runners (30) and a plurality of second branch runners (32) branching from the downstream end of the main hot runner located in the hot runner plate (31). The main hot runner includes a first main runner section (21) and a second main runner section (29) divided by the parting surface of the first mold. The downstream end of the first main runner section (21) has a first main gate (22), and the upstream end of the second main runner section (29) has a second main gate (23). The first main gate (22) and the second main gate (23) are arranged opposite to each other. The plurality of first branch channels (30) are fluidly connected to the plurality of first mold cavities (25a), and the plurality of second branch channels (32) are fluidly connected to the plurality of second mold cavities (35a). A first overflow sleeve (24) is provided outside the first main gate (22) of the first main runner section (21), and a second overflow sleeve (27) is provided outside the second main gate (23) of the second main runner section (29). The first spill cover (24) has a first mating surface facing the second spill cover (27), and the second spill cover (27) has a second mating surface facing the first spill cover (24); and When the first mold is closed, the first mating surface and the second mating surface fit together tightly to form a sealed interface (S).

2. The stacked injection mold according to claim 1, characterized in that: The first sleeve opening (24a) of the first overflow sleeve (24) is located on the axial outside of the first main gate (22); The second sleeve opening (27a) of the second overflow sleeve (27) is located axially outside the second main gate (23). The first sheath opening (24a) and the second sheath opening (27a) are axially aligned and docked with each other when the first mold is closed.

3. The stacked injection mold according to claim 1, characterized in that: The first overflow sleeve (24) has a first cooling water passage (24b) inside, which at least partially surrounds the first main gate (22) circumferentially; and The second overflow sleeve (27) is provided with a second cooling water passage (27b), which at least partially surrounds the second main gate (23) in the circumferential direction.

4. The stacked injection mold according to claim 1, characterized in that, One of the first mating surface and the second mating surface is provided with a protrusion, and the other is provided with a groove that matches the shape of the protrusion.

5. The stacked injection mold according to claim 1, characterized in that, The first mold cavity (25a) and the second mold cavity (35a) are configured to form a first product (A) and a second product (B) of different specifications, respectively.

6. The stacked injection mold according to claim 1, characterized in that, Each of the first cavity (25a) and each of the second cavity (35a) adopts a modular structure that can be independently disassembled and assembled.

7. The stacked injection mold according to any one of claims 1 to 6, characterized in that, The stacked injection mold (1) includes multiple runner temperature control components, each of which includes a temperature measuring element and a heating element. The heating element provides heating based on the measured value of the temperature measuring element. The multiple runner temperature control components are respectively arranged at the gate of the first main gate (22), the second main gate (23), and each of the first sub-runners (30) and each of the second sub-runners (32).

8. An automatic part removal device for a stacked injection mold as described in any one of claims 1 to 7, characterized in that, The automatic item handling device includes: A first control arm (41) and a second control arm (42), both of which are configured to be movable in the horizontal plane and extendable in the vertical direction; A first suction plate (43) is rotatably connected to the lower end of the first control arm (41), and a plurality of first suction cups (45) are provided on the working surface of the first suction plate (43). The arrangement of the plurality of first suction cups (45) corresponds one-to-one with the arrangement of the plurality of first mold cavities (25a) on the first moving mold (25); and The second suction plate (44) is rotatably connected to the lower end of the second control arm (42), and a plurality of second suction cups (46) are provided on the working surface of the second suction plate (44). The arrangement of the plurality of second suction cups (46) corresponds one-to-one with the arrangement of the plurality of second mold cavities (35a) on the second moving mold (35).

9. The automatic part-retrieving device according to claim 8, characterized in that: The first suction plate (43) can be moved to a first position for absorbing products and a second position for sorting products under the control of the first control arm (41). In the first position, the first suction plate (43) is located between the first moving mold (25) and the first fixed mold (26) of the first mold, and is positioned such that the plurality of first suction cups (45) are respectively aligned with the plurality of first mold cavities (25a); in the second position, the first suction plate (43) is positioned such that the plurality of first suction cups (45) are respectively aligned with the openings of the plurality of first sorting containers. and The second suction plate (44) is movable to a third position for picking up products and a fourth position for sorting products under the control of the second control arm (42). In the third position, the second suction plate (44) is located between the second moving mold (35) and the second fixed mold (34) of the second mold and is positioned such that the plurality of second suction cups (46) are respectively aligned with the plurality of second mold cavities (35a); in the fourth position, the second suction plate (44) is positioned such that the plurality of second suction cups (46) are respectively aligned with the openings of the plurality of second sorting containers.

10. The automatic part-retrieving device according to claim 9, characterized in that: A plurality of first material head clamping members are also mounted on the working surface of the first suction plate (43), the plurality of first material head clamping members being arranged such that when the first suction plate (43) is in the first position, the plurality of first material head clamping members are respectively aligned with the material head formed by the plurality of first diversion channels (30); and The working surface of the second suction plate (44) is also equipped with a plurality of second material head clamping members, which are arranged such that when the second suction plate (44) is in the third position, the plurality of second material head clamping members are respectively aligned with the material head formed by the plurality of second diversion channels (32).

11. A multi-specification product molding equipment, characterized in that, It includes the stacked injection mold as described in any one of claims 1 to 7 and the automatic part removal device as described in any one of claims 8 to 10.

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