A laminated mold for injection molding the edge of a refrigerator glass partition

Abstract

This application relates to the field of stacked mold injection molding technology, and in particular to a stacked mold for injection molding the edge of a refrigerator glass partition. It includes a fixed mold, a moving mold, a front push plate and a rear push plate disposed on both sides of the fixed mold. The moving mold includes a front moving mold disposed between the fixed mold and the front push plate, and a rear moving mold disposed between the fixed mold and the rear push plate. The moving mold, together with the front push plate and the rear push plate, forms two identical mold cavities. The invention is characterized by further including: a feeding mechanism for closing and opening the front and rear moving molds; positioning rods, inserted into and slidable at the four corners of the moving mold cavity, with corner grooves for engaging tempered glass; positioning pushers for pushing the positioning rods to slide; and extension mechanisms disposed on two opposite sides of the moving mold for installing the tempered glass. This invention optimizes the installation and positioning process of tempered glass on the mold, improving the molding efficiency of refrigerator partition injection molding.

Description

Technical Field

[0001] This application relates to the field of stacked mold injection technology, and in particular to a stacked mold for injection molding the edge of a refrigerator glass partition. Background Technology

[0002] Injection molds are tools used to produce plastic products, giving them a complete structure and precise dimensions. Molten plastic, heated to a high temperature, is injected into the mold cavity by an injection molding machine, and after cooling and solidification, the molded product is obtained. The most important benefit of developing injection molds is the ability to mass-produce plastic products, making them widely used in production and processing across various industries.

[0003] For example, in the home appliance manufacturing industry, almost every type of home appliance, such as refrigerators, washing machines, and air conditioners, is lined with various plastic structures. These plastic structures play an irreplaceable role in the operation of the home appliances, the installation of components, and the composition of the structure. The mass production of plastic parts is indispensable in the home appliance manufacturing industry; in other words, the use of injection molds is indispensable.

[0004] Injection molds are not static; different molds involve more than just changing the mold cavity. In different categories of home appliances, injection molds are improved and upgraded to enhance manufacturing efficiency while maintaining feasibility and low cost. In refrigerator manufacturing, the refrigerator shelves are an indispensable component. They divide the refrigerator's food storage compartments into layers, allowing users to make better use of the space and store as much food and fresh produce as possible.

[0005] Refrigerator shelves consist of a tempered glass core and plastic edge strips attached to the edges. The injection molding principle is extremely simple: the manufactured tempered glass is first placed into a mold, and then injection molding is performed at the edges of the tempered glass. Since refrigerator shelves of the same brand and model have completely identical shapes and structures, stacked molds can be used to process two or more refrigerator shelves simultaneously during injection molding, thereby improving production efficiency.

[0006] Stacked molds are a cutting-edge mold technology, typically consisting of multiple parting surfaces, each with one or more cavities. This is similar to stacking multiple single-layer molds together and installing them on a single injection molding machine for injection molding production. In other words, multiple cavities are combined into one mold, with multiple cavities overlapping in the mold closing direction, to increase mold capacity and reduce injection molding production costs.

[0007] There are several problems with using stacked molds in the edge injection molding process of refrigerator compartments. One common problem is installation. Since the four edges of the refrigerator compartment are placed in the mold cavity, there is a gap between them and the bottom wall of the mold cavity. Without fixation, they are essentially floating. When technicians install them manually, they need to ensure that they are aligned, that is, the four edges of the glass plate are at the same distance from the bottom wall of the mold cavity. Without additional limiting design, it is difficult to achieve a high yield.

[0008] In response to the aforementioned technologies, a special mold for injection molding of refrigerator shelves should be designed. By optimizing the installation and positioning process of tempered glass on the mold, the molding efficiency of refrigerator shelf injection molding can be improved. Summary of the Invention

[0009] In order to optimize the installation and positioning process of tempered glass on the mold and improve the molding efficiency of refrigerator partition processing injection molding, the present invention provides a stacked mold for edge injection molding of refrigerator glass partition.

[0010] The present invention provides a laminated mold for injection molding the edge of a refrigerator glass partition, which adopts the following technical solution:

[0011] A stacked mold for injection molding the edge of a refrigerator glass partition includes a fixed mold, a movable mold, a front push plate and a rear push plate disposed on both sides of the fixed mold, the movable mold includes a front movable mold disposed between the fixed mold and the front push plate and a rear movable mold disposed between the fixed mold and the rear push plate, the movable mold and the front push plate respectively form two mold cavities with the same structure, characterized in that: it further includes;

[0012] The material conveying mechanism is connected to the front moving mold and the rear moving mold, and is used for the closing and opening of the front moving mold and the rear moving mold;

[0013] Multiple positioning rods are provided, which can be inserted into and slidably moved at the four corners of the mold cavity of the moving mold. The positioning rods are provided with corner grooves corresponding to the corners of the tempered glass. As the positioning rods slide, they protrude from the surface of the moving mold and engage with the tempered glass.

[0014] A positioning pusher is used to push the positioning rod to slide relative to the moving mold;

[0015] An extension mechanism is provided on two opposite sides of the moving mold, for pushing and pulling the side edges of the moving mold away from the moving mold;

[0016] Cooling channels are formed inside the moving mold to allow cooling water to flow.

[0017] By adopting the above technical solution, the special injection molding process of the refrigerator shelf requires the loading of tempered glass before the injection molding of the plastic edge strip of the refrigerator shelf. To address this, a material conveying mechanism and an extension mechanism are added to the traditional mold to optimize the installation, positioning, and loading of the tempered glass in the existing model. Specifically, positioning rods are set at the four corners corresponding to the tempered glass being installed on the moving mold. In the initial state, the surface of the positioning rods is in contact with the surface of the moving mold cavity to protect the appearance shape of the plastic part formed during molten plastic injection. During installation, a positioning pusher pushes the positioning rods out of the moving mold surface. Then, corner grooves are made on the positioning rods to correspondingly engage the four corners of the tempered glass. This allows technicians to simply engage the tempered glass with the corresponding corner grooves during installation. After installation, the positioning pusher... The moving part pulls the positioning rod to reset, realizing the positioning and fixation of the tempered glass after installation. At the same time, considering the limitations of the moving mold structure, the technicians will be hindered by the bottom wall of the moving mold cavity when installing the tempered glass. Therefore, an extension mechanism is set up to push the two opposite mold cavity walls away from the moving mold cavity, so that the technicians can install the tempered glass smoothly. Finally, based on the above positioning and extension mechanism, the material conveying mechanism delivers the moving mold to a position and angle that is convenient for the technicians to install. After the tempered glass is fixed, the moving mold is reset by the material conveying mechanism, completing the entire process of loading the tempered glass. After loading, the front push plate pushes the front moving mold and the rear push plate pushes the rear moving mold to form two mold cavities. Molten plastic is injected into the mold cavities through the injection pipe. Finally, the mold is cooled through the cooling channel, and the plastic part is hardened and shaped.

[0018] Optionally, the extension mechanism includes;

[0019] The extended side is slidably connected to the two opposite sides of the moving mold, forming the bottom wall of the mold cavity. It slides away from the moving mold to facilitate the installation of tempered glass. Correspondingly, the moving mold is provided with an extended pusher for driving the extended side to slide and an extended guide rail for guiding the extended side to slide.

[0020] By adopting the above technical solution, the extension mechanism is used to expand the surface area of ​​the moving mold, so as to avoid the mold cavity wall of the moving mold from obstructing the installation of technicians. It is mainly achieved by pushing and pulling the extension pusher. The extension pusher is set to connect the two opposite edges of the moving mold, and the bottom wall of the moving mold cavity on both opposite sides is slidably set. When the technician installs the tempered glass, the extension pusher pulls the extension side away from the moving mold, so as to avoid the edge of the mold cavity side wall of the moving mold from obstructing the technician's hands. Based on the sliding structural design, an extension guide rail is added in the sliding direction of the extension side, which plays a role in guiding and supporting the sliding of the extension side during the sliding process. After the technician finishes the installation, when the material conveying mechanism resets the front and rear moving molds, the extension pusher resets the extension side and reassembles the mold cavity.

[0021] Optional, also includes;

[0022] A rubber protective texture is set at the center of the bottom wall of the moving mold to protect the tempered glass.

[0023] By adopting the above technical solution, rubber protective texture, as a common type of glass protector, is applied inside the mold. When the moving mold is clamped with the front and rear push plates to form a mold cavity, the two tempered glass surfaces simultaneously press against the surfaces of the moving mold and the front and rear push plates. Setting a rubber protective texture on one side changes the traditional hard contact surface to a soft contact, protecting the tempered glass surface from wear and increasing the surface friction between the tempered glass and the front and rear push plates, thus strengthening the fixing effect of the tempered glass. It should be noted that the rubber protective texture should only be set on one side. If rubber protective textures are set on both sides of the moving mold and the surfaces of the front and rear push plates, simultaneously pressing against both sides of the tempered glass, the tempered glass will lose its fixing effect and experience slight displacement. In addition, due to the thermal conductivity of the mold, the material of the rubber protective texture must be a heat-resistant material, with silicone rubber being the preferred choice.

[0024] Optional, also includes;

[0025] The pusher plate is slidably connected to the center part of the front pusher plate and the rear pusher plate respectively. It slides along a direction perpendicular to the surface of the front pusher plate or the rear pusher plate to push the molded part onto the moving mold and fix it.

[0026] The material pusher is disposed inside the front push plate and the rear push plate respectively, and is used to drive the push plate to slide. Correspondingly, the front push plate and the rear push plate are provided with grooves for accommodating the material pusher.

[0027] By adopting the above technical solution, it is ensured that the tempered glass receives the pushing and pressing effect of the pusher plate during mold opening, so that the tempered glass is fixed on the moving mold and transported out. Since only half of the mold cavity is on the moving mold during mold opening, the refrigerator partition after injection molding has a certain probability of sticking to the surface of the front and rear pusher plates without the pusher plate, interfering with the transport of the refrigerator partition. The specific implementation method is that the pusher pushes the pusher plate to press the tempered glass of the refrigerator partition against the pusher plate during the mold opening process until the mold is fully opened.

[0028] Optional, also includes;

[0029] A limiting plate is installed on one side of the moving mold and is vertically slidably connected to the top wall of the moving mold, used for fixing the refrigerator partition when transporting materials;

[0030] A material limiting pusher is disposed above the moving mold and is used to push the material limiting plate to slide vertically.

[0031] By adopting the above technical solution, the limiting plate is used to fix the refrigerator partition on the moving mold when the injection-molded refrigerator partition is transported out. After injection molding, the four sides of the tempered glass are surrounded by edge plastic strips. During material loading, the positioning rods used for fixing are only set for the four corners of the tempered glass, which interfere with the edge plastic strips and cannot fix the injection-molded product. Therefore, the limiting plate needs to be set on the outside of the bottom wall of the mold cavity in a part that does not interfere with the injection molding of the mold cavity. In order to save space in the structure, the limiting plate can be installed on the top wall of the moving mold, and a limiting pusher is set above the top wall of the moving mold to push the limiting plate. When the mold is opened and the pusher plate presses the refrigerator partition tightly against it, the limiting pusher pushes the limiting plate downwards, protruding from the top side surface of the moving mold, and abutting the tempered glass on the outside of the refrigerator partition, limiting the tempered glass on the moving mold, and continuously maintaining the limiting position of the refrigerator partition during the transportation process of the refrigerator partition after the mold is opened.

[0032] Optionally, the material conveying mechanism includes:

[0033] A conveying rod is slidably connected to one side of the moving mold and parallel to the surface of the moving mold. One end of the rod is connected to one side of the moving mold. The conveying rod is telescopically oriented along its length and is used to push and pull the moving mold toward the fixed mold.

[0034] A material conveying guide rail is horizontally set and perpendicular to the material conveying rod. One end of the material conveying rod is slidably connected to the material conveying guide rail for guiding the horizontal sliding of the material conveying rod.

[0035] A material conveying pusher is mounted on the material conveying guide rail and is used to push the material conveying rod to slide.

[0036] By adopting the above technical solution, a conveying coordinate system for the refrigerator partition is established using bidirectional displacement perpendicular to each other. Two degrees of freedom are set in the parallel and perpendicular mold opening directions to achieve the installation and loading of tempered glass and the injection molding and unloading of the refrigerator partition. Specifically, the conveying rod is retractable in the direction away from or towards the moving mold, so that the moving mold carries the tempered glass and moves towards the mold closing point, or carries the injection-molded refrigerator partition away from the mold closing point. Then, the conveying guide rail and the conveying pusher push the conveying rod to slide in the horizontal plane in a direction perpendicular to the conveying rod, so that the moving mold slides back and forth in the mold opening direction. When the mold is opened, the conveying pusher pushes the conveying rod to slide along the conveying guide rail, so that the front and rear moving molds are away from the moving mold by a certain distance. Then the conveying rod retracts and shortens, so that the two moving molds slide away from the mold closing point, i.e., towards the technician. The technician disassembles the processed refrigerator partition and installs new tempered glass. Then the conveying rod returns to its original trajectory in the reverse direction, realizing the unloading and loading process of the new tempered glass.

[0037] Optionally, the end of the conveying rod is hinged to one side of the moving mold, and the moving mold rotates along the hinged side to a direction parallel to the conveying guide rail, facing the technicians, which facilitates the installation and unloading of the tempered glass;

[0038] The hinged portion on the side of the conveying rod is equipped with a rotating component for driving the moving mold to rotate.

[0039] By adopting the above technical solution, when the moving mold slides away from the moving mold to the side of the technician via the material conveyor rod, the hinge structure at the end of the material conveyor rod drives the moving mold to rotate around the material conveyor rod by a maximum of 90°, so that it is completely facing the technician. Moreover, the front moving mold and the rear moving mold rotate in opposite directions at the same time to avoid interference. The technician can directly remove the injection-molded refrigerator partition and install the tempered glass.

[0040] Optional, also includes;

[0041] A cooling channel is provided inside the moving mold for the flow of cooling water, with its inlet and outlet located in the middle of opposite sides of the same moving mold.

[0042] The cooling channel is branched off near the water inlet, distributed along the mold cavity, and flows through the middle.

[0043] By adopting the above technical solution, the distribution path of the cooling water flow in the cooling channel is set to correspond to the injection channel in this mold. It can be applied to all square injection circuits. One side of the moving mold is used for water inlet, and the opposite side is used for water outlet to ensure smooth water flow. For unidirectional circuits, the main cooling problem is that the water flow temperature is low at the front end and increases after the water flow absorbs heat from the mold at the rear. The temperature difference of the cooling water flow can easily lead to uneven cooling of the injection molded body, resulting in temperature gradient phenomenon and causing stress concentration or uneven deformation of the injection molded body. To solve the above problems, this solution splits the water flow into three branches at the inlet of the cooling channel, forming a cross shape at the split point. Two branches correspond to the injection mold cavity, and the other branch flows to the center of the moving mold and then splits to both sides, merging into the two branches that were originally split, providing cold water for the original flow in the middle part, reducing the temperature of the cold water at the rear of the mold cavity as much as possible, and ensuring the cooling effect of the injection molded part in the injection mold cavity. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0045] Figure 2 This is a structural schematic diagram to highlight the material conveying mechanism in the embodiments of this application.

[0046] Figure 3 This is a structural diagram to highlight the positioning mechanism in the embodiments of this application.

[0047] Figure 4 This is a structural diagram designed to highlight the pusher plate.

[0048] Figure 5 yes Figure 4 Enlarged view of part A.

[0049] Figure 6 This is a structural diagram designed to highlight the internal cooling channels of the moving mold.

[0050] Explanation of reference numerals in the attached drawings: 1. Injection molding machine; 11. Front push plate; 12. Rear push plate; 13. Mold closing rod; 2. Fixed mold; 3. Moving mold; 31. Front moving mold; 32. Rear moving mold; 33. Positioning rod; 331. Corner groove; 34. First micro electric cylinder; 35. Extension mechanism; 351. Third drive cylinder; 352. Extension guide rail; 353. Extension plate; 354. Extension side; 36. Rubber protective texture; 37. Push plate; 371. Second micro electric cylinder; 38. Material limiting mechanism; 381. Material limiting plate; 382. Third micro electric cylinder; 39. Cooling channel; 4. Material conveying mechanism; 41. Material conveying guide rail; 42. First drive cylinder; 43. Material conveying rod; 431. Second drive cylinder; 44. Rotary motor. Detailed Implementation

[0051] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0052] This application discloses a stacked mold for injection molding the edge of a refrigerator glass partition. (Refer to...) Figure 1 A stacked mold for injection molding the edge of a refrigerator glass partition is positioned between two opposing injection tubes of an injection molding machine 1. Molten plastic is injected into the mold cavity through the two injection tubes. The mold includes: a fixed mold 2; a front push plate 11 and a rear push plate 12 positioned on either side of the fixed mold 2; a front moving mold 31 positioned between the fixed mold 2 and the front push plate 11; and a rear moving mold 32 positioned between the fixed mold 2 and the rear push plate 12. The front moving mold 31 and the rear moving mold 32 form the moving mold 3 in the injection molding machine 1, which is paired with the fixed mold 2. The injection molding machine 1 is equipped with a clamping rod 13 for pushing the front push plate 11 and the rear push plate 12. The injection molding technology in this embodiment is similar to the injection molding process in the conventional process. The clamping rod 13 pushes the front push plate 11 and the rear push plate 12, pushing the front moving mold 31 and the rear moving mold 32 to fit against their respective moving molds 3. The moving molds 3 are tightly attached to the fixed mold 2, which serves as the base plate and is supported by the fixed mold 2, thus forming the mold cavity.

[0053] Reference Figure 2In this embodiment, a horizontally arranged material guide rail 41 is installed on one side of the injection molding machine 1. Two horizontally arranged material guide rods 43 are slidably connected to the material guide rail 41, but perpendicular to the length direction of the material guide rail 41. The ends of the two material guide rods 43 away from the material guide rail 41 are respectively connected to the same side edge of the front moving mold 31 and the rear moving mold 32. A first driving cylinder 42 for driving the material guide rods 43 to slide along the direction of the material guide rail 41 is provided on the material guide rail 41. One first driving cylinder 42 is provided for each of the two material guide rods 43. The cylinder body of the first driving cylinder 42 is fixedly connected to the injection molding machine 1, and the piston rod of the first driving cylinder 42 is fixedly connected to the material guide rod 43.

[0054] To simplify the mechanism, the material conveying rod 43 in this embodiment is composed of a second driving cylinder 431. The piston rod of the first driving cylinder 42 is fixed to the cylinder body of the second driving cylinder 431. Correspondingly, the end of the piston rod of the second driving cylinder 431 is connected to the moving mold 3.

[0055] Reference Figure 2 In this embodiment, the piston rod ends of the two second drive cylinders 431 are hinged to the front moving mold 31 and the rear moving mold 32, so that the front moving mold 31 and the rear moving mold 32 can rotate around the hinge side. Correspondingly, a rotary motor 44 is provided at the hinge point of the front moving mold 31 and the rear moving mold 32. The rotary motor 44 is a rotating component that drives the moving mold 3 to rotate, and its output shaft is fixedly connected to the hinge part of the moving mold 3.

[0056] The above describes the material handling mechanism 4 for the injection molded part in this embodiment of the application. It has the advantage of facilitating installation and material loading by technicians. Specifically, after mold opening, the first drive cylinder 42 first pushes the material handling rod 43, meaning the second drive cylinder 431 slides a certain distance in the mold opening direction, causing the front moving mold 31 and the rear moving mold 32 to slide without rubbing against the fixed mold 2, the front push plate 11, and the rear push plate 12. Then, the second drive cylinder 431 retracts its piston rod, causing the front moving mold 31 and the rear moving mold 32 to slide away from the mold closing point, i.e., towards the technicians. During the process of the second drive cylinder 431 retracting its piston rod… The first drive cylinder 42 maintains the extended length of the piston rod, keeping the second drive cylinder 431 locked in its current position. After the first drive cylinder 42 retracts the piston rod until the moving mold 3 is close to the technician, the rotating motor 44 operates, rotating the front moving mold 31 and the rear moving mold 32 90° in opposite directions to face the technician. After the technician removes the refrigerator partitions on the front moving mold 31 and the rear moving mold 32, he installs new tempered glass. After the tempered glass is fixed, the first drive cylinder 42, the second drive cylinder 431, and the rotating motor 44 operate in opposite directions according to the above-mentioned running trajectory until the front moving mold 31 and the rear moving mold 32 are reset.

[0057] In this embodiment, both the first driving cylinder 42 and the second driving cylinder 431 are self-locking cylinders. Because of the self-locking performance of the self-locking cylinder, it can provide a stable position locking effect. In this embodiment, the above-mentioned active component has a stable sliding effect when sliding and feeding. The self-locking cylinder also has the effect of low energy consumption when self-locking, which meets the design requirements of the stacked mold in this embodiment.

[0058] Reference Figure 3 The front moving mold 31 and the rear moving mold 32 are internally connected to four positioning rods 33 with the same structure and distribution. Taking the front moving mold 31 as an example, the four positioning rods 33 are set at the four corners of the tempered glass, and their axes are perpendicular to the surface of the moving mold 3. The four positioning rods 33 can slide to protrude from the surface of the moving mold 3. The moving mold 3 is internally provided with a first micro electric cylinder 34 corresponding to each positioning rod 33, and a groove is opened to accommodate the first micro electric cylinder 34. The piston rod of the first micro electric cylinder 34 is fixed to the end of the positioning rod 33. On this basis, corner grooves 331 are opened at the positions where the four positioning rods 33 are close to each other. The corner grooves 331 are opened at right angles to the corners of the tempered glass.

[0059] In this embodiment, the four corners of the tempered glass are fixed by positioning rods 33. When the moving mold 3 rotates around the hinge side to the technician according to the above material conveying process, the first micro electric cylinder 34 extends the piston rod to push the positioning rods 33 out of the moving mold 3 surface. The technician installs the tempered glass between the four positioning rods 33 to fix the tempered glass. After the material conveying mechanism 4 drives the front moving mold 31 and the rear moving mold 32 to reset, when the mold closing rod 13 of the injection molding machine 1 pushes the front push plate 11 and the rear push plate 12 to close the mold, the end of the positioning rod 33 on the front push plate 11 abuts against the front push plate 11 and the positioning rod 33 on the rear push plate 12 abuts against the rear push plate 12 to close the mold. When the mold closes, the positioning rod 33 retracts and the retraction speed is consistent with the mold closing speed. When the tempered glass abuts against the front push plate 11 and the front moving mold 31, and the rear push plate 12 and the rear moving mold 32 on both sides, the positioning and fixing of the tempered glass during the material conveying process is realized.

[0060] Reference Figure 3 Based on the accuracy requirements of the positioning process mentioned above, in this embodiment, the positioning rods 33 are distributed inside the mold cavity. In order to ensure that the corner groove 331 does not interfere with the shape of the plastic strip at the edge during injection molding, the ends of the four positioning rods 33 that protrude from the surface of the moving mold 3 are provided with fitting parts to ensure that they are always seamlessly fitted to the curved surface of the mold cavity during injection molding. As part of the side wall of the mold cavity, the positioning rods 33 with fitting parts do not affect the loading of materials by the technicians. The technicians tilt the tempered glass between the four positioning rods 33, align it with the corner groove 331, and then gradually return it to a vertical state.

[0061] Reference Figure 3To ensure that technicians are not obstructed by the sides of the mold during installation, this embodiment also includes an extension mechanism 35, which includes an extension side 354 and a third drive cylinder 351 for driving the extension side 354 to slide. In this embodiment, the opposite sides of the front moving mold 31 and the rear moving mold 32 in the horizontal direction are used as extension sides 354, and an extension plate 353 extending from the moving mold 3 is fixedly connected to the edge of the corresponding extension side 354 of the moving mold 3. The surface of the extension plate 353 is parallel to the surface of the moving mold 3. The third drive cylinder 351 is set on the extension plate 353 facing the extension side 354, and its piston rod is fixedly connected to the extension side 354. An extension guide rail 352 is provided on the extension plate 353 in the sliding direction away from the moving mold 3 body corresponding to the extension side 354 for guiding the extension side 354.

[0062] In this embodiment, the extension mechanism 35 is designed to facilitate material loading by technicians. After the front moving mold 31 and the rear moving mold 32 are rotated to face the technician, the technician installs the tempered glass onto the positioning rod 33. If installed directly, the two side edges of the moving mold 3 on opposite sides will obstruct the technician's hand placement and also hinder the technician from disassembling the refrigerator shelf. Therefore, a third drive cylinder 351 and an extension plate 353 equipped with the third drive cylinder 351 are provided. When the technician installs the tempered glass or disassembles the refrigerator shelf, the third drive cylinder 351 pulls the extension side 354, releasing the surface space of the moving mold 3 and eliminating the obstruction of the side edges to the technician's hand.

[0063] When the extension mechanism 35 is set up as described above, in order to prevent the extension plate 353 from obstructing the rotation of the moving mold 3 along the hinge side, the extension plate 353 is set above the conveying rod 43, and the lowest point of the extension plate 353 is higher than the height of the conveying rod 43.

[0064] Reference Figure 3 To protect the surface structure of the tempered glass in the mold cavity and increase its friction within the mold, this embodiment installs rubber protective textures 36 at the contact points of the tempered glass on the front moving mold 31 and the rear moving mold 32. The rubber protective textures 36 must have heat-resistant properties; therefore, in this embodiment, they are made of silicone rubber. The structure of the rubber protective textures 36 is designed as a ring shape to ensure a uniform distribution of friction points. Since silicone contact is a soft contact, uneven spatial distribution can easily lead to displacement of the tempered glass. It is worth noting that in this embodiment, the rubber protective textures 36 are only provided on one side of the tempered glass. Taking the front moving mold 31 as an example, the rubber protective textures 36 are only provided on the side wall of the front moving mold 31. When the tempered glass is bonded to the mold cavity between the front push plate 11 and the front moving mold 31, the rubber protective textures 36 are only provided on the contact surface of the tempered glass on one side of the front moving mold 31. If they were provided on both sides, the tempered glass would lose its rigid support surface and be prone to displacement.

[0065] Reference Figure 4Both the front push plate 11 and the rear push plate 12 have push plates 37 at their center near the moving mold 3. Since the push plates 37 on the front push plate 11 and the rear push plate 12 have the same structure and are symmetrically distributed along the fixed mold 2, the front push plate 11 is used as an example. The surface of the push plate 37 is parallel to the surface of the front push plate 11. The push plate 37 is independent of the front push plate 11. The front push plate 11 has a groove inside, and a second micro electric cylinder 371 for pushing the push plate 37 is installed inside. The piston rod of the second micro electric cylinder 371 is fixedly connected to the surface of the push plate 37. Before the installation and material transportation of the tempered glass are completed and the injection molding is finished, the surface of the push plate 37 remains parallel to the surface of the front push plate 11. When the mold is opened, the second micro electric cylinder 371 extends the piston rod. The extension rate of the piston rod is consistent with the mold opening speed of the injection molding machine 1, so that the surface of the push plate 37 gradually protrudes from the surface of the front push plate 11 and presses against the surface of the refrigerator partition after injection molding, pressing the refrigerator partition against the front moving mold 31.

[0066] Continuing with the example of the moving mold 31, since the cavity formed by the front push plate 11 and the front moving mold 31 after injection molding is completed and the mold is opened, the front push plate 11 and the front moving mold 31 each belong to half of the cavity. Without the ejector plate 37, the refrigerator partition has a certain probability of getting stuck in the cavity of the front push plate 11, thus affecting the material feeding of the refrigerator partition by the front moving mold 31. Therefore, after injection molding is completed, the ejector plate 37 is set to prevent the refrigerator partition from getting stuck in the cavity of the front push plate 11.

[0067] Reference Figure 5 Based on the aforementioned pusher mechanism on the front pusher plate 11 and rear pusher plate 12, after the pusher mechanism abuts the injection-molded refrigerator partition onto the moving mold 3, the edges of the tempered glass are attached with injection-molded edge plastic strips, which cannot be positioned by the positioning rods 33 corresponding to the tempered glass. In order to fix the refrigerator partition on the moving mold 3 during transportation after injection molding, a limiting mechanism 38 is adopted in this embodiment. The limiting mechanism 38 includes a limiting plate 381 that is inserted and slidably connected to the inside of the top side of the moving mold 3. The limiting plate 381 is vertically set and parallel to the surface of the moving mold 3. The limiting plate 381 slides down with its surface facing down until it protrudes from the top side surface of the moving mold 3. At this time, the surface of the limiting plate 381 abuts the refrigerator partition. With the snapping action of the upper half of the mold cavity of the moving mold 3 and the friction of the rubber protective texture 36, the refrigerator partition is restricted to the surface of the moving mold 3 when the material conveying mechanism 4 transports the moving mold 3.

[0068] Reference Figure 5 Corresponding to the aforementioned limiting plate 381, a third micro electric cylinder 382 for pushing the limiting plate 381 is provided on the top side of the moving mold 3. The third micro electric cylinder 382 is vertically arranged, and its piston rod is vertically downward, with the end of the piston rod fixed to the limiting plate 381.

[0069] Reference Figure 6In this embodiment, the cooling channel 39 through which the cooling water flows has been redesigned. The inlet of the cooling channel 39 is located above the moving mold 3, and the outlet of the same cooling channel 39 is located below the moving mold 3, opposite to the inlet. Both the inlet and outlet are located in the center of two opposite sides of the moving mold 3. The portion of the cooling channel 39 near the inlet is divided into three branches in a cross shape. Two of the branches are distributed along the injection mold cavity, and the other branch continues to flow in a direction parallel to the inlet to the center of the moving mold 3 for secondary branching. The two branches of the secondary branch merge with the two branches flowing along the mold cavity and flow out from the outlet.

[0070] In this embodiment, the flow channel design of the cooling channel 39 focuses on solving the problem of uneven temperature distribution under traditional unidirectional flow conditions, and improving the problem of stress concentration on the plastic edge strips caused by temperature gradients in unidirectional flow, which makes them prone to detachment and poor adhesion. The flow channel near the inlet is divided into three branches, two of which flow along the mold cavity to cool the mold cavity, and the remaining branch is an injection path that does not pass through the mold cavity. It maintains its original temperature while absorbing less heat from the mold, and merges with the two cooling branches that flow along the mold cavity in the center of the path. This reduces the temperature of the cooling branch that has heated up after absorbing heat from the mold cavity, thereby achieving uniform cooling effect throughout the cooling channel 39.

[0071] The implementation principle of a stacked mold for injection molding the edge of a refrigerator glass partition according to an embodiment of this application is as follows: taking one injection cycle as an example, the injection molding machine 1 opens the mold, and the mold closing rod 13 pulls the front push plate 11 and the rear push plate 12 to slide away from the fixed mold 2. The second micro electric cylinders 371 on the front push plate 11 and the rear push plate 12 push the pusher plate 37 to abut against the tempered glass of the refrigerator partition. During the mold opening process, the refrigerator partition is fixed on the front moving mold 31 and the rear moving mold 32. At the same time as the second micro electric cylinder 371 extends the piston rod, the third micro electric cylinder 382 acts, extending the piston rod to push the limiting plate 381 to abut against the refrigerator partition on the front moving mold 31 and the rear moving mold 32 under the action of the pusher plate 37. With the soft friction effect of the semi-mold cavity and the rubber protective texture 36 on the front moving mold 31 and the rear moving mold 32, the refrigerator partition abuts against the front moving mold 31 and the rear moving mold 32. After the limiting plate 381 acts, the second micro electric cylinder 371 automatically de-energizes, keeping the piston rod in the extended state.

[0072] During the mold opening process, after the mold closing rod 13 pulls the front push plate 11 and the rear push plate 12 away from the moving mold 3 by a certain distance, the two first drive cylinders 42 operate simultaneously, driving the cylinder bodies of the corresponding two second drive cylinders 431 to move in the opposite direction along the material conveying guide rail 41 by a certain distance. Then, under the action of the two rotating motors 44, the front moving mold 31 and the rear moving mold 32 rotate 90° in the opposite direction, so that the side with the half mold cavity is facing the technician. The third micro electric cylinder 382 retracts its piston rod, canceling the latching of the refrigerator shelf. The technician can then easily disassemble the refrigerator shelf, take out the next tempered glass, and prepare for installation.

[0073] The third drive cylinder 351 operates, pulling the extension side 354 along the extension guide 352 away from the moving mold 3, extending the surface area of ​​the moving mold 3 and avoiding obstruction of subsequent installation of the tempered glass by technicians. Simultaneously, multiple first micro-cylinders 34 on the moving mold 3 operate synchronously, extending their piston rods to push the positioning rods 33 out of the moving mold 3 surface. Workers install the tempered glass into the four corner slots 331 corresponding to the positioning rods 33. After the tempered glass on the front moving mold 31 and the rear moving mold 32 is installed, the third drive cylinder 351 retracts its piston rod, the extension side 354 resets, and the surface area of ​​the moving mold 3 is restored. The first drive cylinder 42 and the second drive cylinder 431 operate in reverse along their original operating trajectories and paths. While the second drive cylinder 431 extends its piston rod, the first drive cylinder 42 retracts its piston rod to adjust the position of the moving mold 3, so that the front moving mold 31 and the rear moving mold 32 are engaged with the fixed mold 2.

[0074] When the moving mold 3 is engaged with the fixed mold 2, the mold closing rod 13 continues to operate, closing the front push plate 11 and the rear push plate 12 toward the moving mold 3. When the front push plate 11 and the rear push plate 12 abut against the positioning rod 33, the first micro electric cylinder 34 retracts the piston rod at a rate equal to that of mold closing, causing the positioning rod 33 to gradually slide toward the inside of the moving mold 3 until the front push plate 11 and the rear push plate 12 are both attached to the moving mold 3. At this time, the positioning rod 33 is attached to the surface of the moving mold 3 to form a mold cavity.

[0075] When injection begins, as the injection tube injects molten plastic into the mold cavity, the water inlets on the top and bottom sides of the injection molding machine 1 are connected to the inlet and outlet of the mold cooling channel 39. Water is injected into the cooling channel 39 while water exits from the other end to ensure water supply.

[0076] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A laminated mold for injection molding the edge of a refrigerator glass partition, comprising a fixed mold (2), a movable mold (3), a front push plate (11) and a rear push plate (12) arranged on both sides of the fixed mold (2), the movable mold (3) comprising a front movable mold (31) arranged between the fixed mold (2) and the front push plate (11) and a rear movable mold (32) arranged between the fixed mold (2) and the rear push plate (12), the movable mold (3) and the front push plate (11) and the rear push plate (12) respectively forming two identical mold cavities, characterized in that: Also included are; The material conveying mechanism (4) is connected with the front movable die (31) and the rear movable die (32), and is used for clamping and opening of the front movable die (31) and the rear movable die (32); A plurality of positioning rods (33) are arranged, are inserted and can slide at the four corners of the cavity of the movable die (3), the positioning rod (33) is provided with an angle groove (331) corresponding to the corner of the strengthened glass, and the positioning rod (33) slides to protrude from the surface of the movable die (3) and clamps the strengthened glass; The positioning pusher is used for pushing the positioning rod (33) to slide relative to the movable die (3); The extension mechanism (35) is arranged at two opposite sides of the movable die (3) and is used for pushing and pulling the side edge of the movable die (3) away from the movable die (3); The cooling channel (39) is arranged in the movable die (3), and cooling water flows in the cooling channel (39).

2. The laminated mold for injection molding the edge of the glass partition of a refrigerator according to claim 1, wherein: The extension mechanism (35) comprises; The extension side (354) is slidably connected at two opposite sides of the movable die (3) and is a bottom wall of the cavity, slides away from the movable die (3) to facilitate installation of the strengthened glass, and correspondingly, the movable die (3) is provided with an extension pusher for driving the extension side (354) to slide and an extension guide rail (352) for guiding the extension side (354) to slide.

3. The laminated mold for injection molding the edge of the glass partition of a refrigerator according to claim 1, wherein: Also included are; The rubber protection pattern (36) is arranged at the center of the bottom wall of the movable die (3) and is used for protecting the strengthened glass.

4. The laminated mold for injection molding the edge of the glass partition of a refrigerator according to claim 1, wherein: Also included are; The material pushing plate (37) is slidably connected at the center of the front pushing plate (11) and the rear pushing plate (12) respectively, slides in a direction perpendicular to the surface of the front pushing plate (11) or the rear pushing plate (12), and pushes and presses the formed piece on the movable die (3) to be fixed; The material pushing pusher is arranged in the front pushing plate (11) and the rear pushing plate (12) respectively, is used for driving the material pushing plate (37) to slide, and correspondingly, the front pushing plate (11) and the rear pushing plate (12) are provided with grooves for accommodating the material pushing pusher.

5. The laminated mold for injection molding the edge of the glass partition of a refrigerator according to claim 1, wherein: Also included are; The material limiting plate (381) is arranged at one side of the movable die (3) and is vertically slidably connected with the top wall of the movable die (3), and is used for fixing when the refrigerator partition plate conveys materials; The material limiting pusher is arranged above the movable die (3) and is used for pushing the material limiting plate (381) to vertically slide.

6. The stack mold for injection molding the edge of the glass partition of a refrigerator according to claim 1, wherein: The material conveying mechanism (4) comprises; The material conveying rod (43) is slidably connected at one side of the movable die (3) and is parallel to the surface of the movable die (3), one end of the material conveying rod (43) is connected with one side of the movable die (3), the material conveying rod (43) is arranged to be telescopic along the length direction, and is used for pushing and pulling the movable die (3) towards the fixed die (2); The material conveying guide rail (41) is horizontally arranged and is perpendicular to the material conveying rod (43), one end of the material conveying rod (43) is slidably connected with the material conveying guide rail (41), and is used for horizontal sliding guide of the material conveying rod (43); The material conveying pusher is arranged on the material conveying guide rail (41) and is used for pushing the material conveying rod (43) to slide.

7. The laminated mold for injection molding the edge of the glass partition of a refrigerator according to claim 6, wherein: The end of the material conveying rod (43) is hinged with one side of the movable die (3), the movable die (3) rotates along the hinged side to the direction parallel to the material conveying guide rail (41), faces the technician, and facilitates installation and unloading of the strengthened glass; The side hinged part of the material moving rod (43) is provided with a rotating member for driving the rotating of the movable die (3).

8. The stack mold for injection molding the edge of the glass partition of a refrigerator according to claim 1, wherein: Also comprising; A cooling channel (39) is arranged inside the movable die (3) for the flow of cooling water, the water inlet and outlet are arranged in the middle part of the opposite sides of the movable die (3); The part of the cooling channel (39) near the water inlet is divided into several branches, which are distributed along the die cavity and the middle part of the flow.

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