A pre-eject type refrigerator upper partition plate injection molding device

Abstract

The utility model relates to injection moulding technical field, and specifically is a kind of pre-ejector refrigerator upper baffle injection moulding device, comprising: injection molding machine, injection molding chamber of injection molding machine is provided with injection mold, and injection mold includes movable mould and fixed mould;Fixed mould is provided with the article cavity, and the article cavity is provided with ejector assembly, and ejector assembly includes the ejector piece and driving piece of slidingly being arranged on fixed mould, driving piece action, can drive ejector piece relative to fixed mould sliding;Ejector piece is also provided with suction accessory, and suction accessory is cooperated with the suction assembly of being arranged on article cavity, when ejector piece relative to fixed mould sliding, suction assembly can first the position of suction accessory is fixed, to make ejector piece to injection molding piece is adsorbed, and then drive suction accessory to keep synchronous movement with ejector piece;Through the cooperation between ejector assembly and suction accessory and suction assembly, can avoid the phenomenon of rebound of injection molding piece in the process of ejecting, to improve the product quality of injection molding piece.

Description

Technical Field

[0001] This utility model relates to the field of injection molding technology, specifically to an injection molding device for a pre-top refrigerator upper partition. Background Technology

[0002] Currently, the shelves used in kitchen appliances such as refrigerators are designed with complex curved surfaces for aesthetic purposes. These shelves are usually made by placing the glass after the outer frame is formed.

[0003] Currently, injection molding machines, after completing the injection molding process, employ a pre-ejection device to eject the molded part in advance to facilitate demolding. Generally, pre-ejection devices operate using pneumatic or hydraulic control. This method has a slower response time, lower stability due to environmental influences, and a faster initial ejection speed to quickly overcome mold clamping forces; the second ejection speed is then reduced to avoid product damage due to excessive speed. However, in actual ejection, during the initial rapid ejection phase, the molded part may bounce due to sudden loss of constraint the moment it overcomes the mold clamping forces. This phenomenon leads to dimensional instability in the molded part, affecting the product's assembly and usability. Utility Model Content

[0004] The purpose of this invention is to provide a pre-top refrigerator upper shelf injection molding device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A pre-top refrigerator upper shelf injection molding device includes: an injection molding machine, wherein an injection mold is provided in the injection chamber of the injection molding machine, and the injection mold includes a moving mold and a fixed mold;

[0007] The fixed mold is provided with a storage cavity, and an ejection assembly is provided in the storage cavity. The ejection assembly includes an ejector and a driving member that are slidably disposed on the fixed mold. When the driving member is activated, it can drive the ejector to slide relative to the fixed mold.

[0008] The ejector is also provided with an adsorption component, which cooperates with a suction assembly provided on the placement cavity. When the ejector slides relative to the fixed mold, the suction assembly can first fix the position of the adsorption component so that the adsorption component adsorbs the injection molded part, and then drive the adsorption component to move synchronously with the ejector.

[0009] The pre-top refrigerator upper partition injection molding device described above: the ejector includes ejector rods slidably disposed on the fixed mold, and four sets of ejector rods are evenly distributed. The four sets of ejector rods are fixed to each other and slidably disposed in the first ejection hole opened on the fixed mold.

[0010] As described above, the pre-top refrigerator upper partition injection molding device includes an ejector cavity fixedly connected to the ejector rod. The ejector cavities are distributed in four groups at equal intervals along the axis of the fixed mold. The four groups of ejector cavities are fixed to the ejector rod, and the ejector cavities are slidably disposed in the second ejector hole opened on the fixed mold.

[0011] As described above, the pre-top refrigerator upper shelf injection molding device has four sets of driving components, each set of driving components cooperating with a corresponding set of ejector rods. Each set of driving components includes a driving rod rotatably mounted on the storage cavity. A sleeve ring fixedly connected to the ejector rod is sleeved on the driving rod. A first protrusion is formed on the inner wall of the sleeve ring. The first protrusion is slidably disposed in a fitting groove opened on the outer wall of the driving rod.

[0012] The pre-top refrigerator upper shelf injection molding device described above: the fitting groove includes a first threaded groove and a second threaded groove formed on the drive rod.

[0013] As described above, the pre-top refrigerator upper shelf injection molding device includes an active structure and a lifting structure. The active structure includes a sleeve fixedly connected to the ejection cavity and an active rod rotatably mounted on the storage cavity. The sleeve is sleeved on the active rod, and a second protrusion is formed on the inner wall of the sleeve. The second protrusion is slidably disposed in a composite groove opened on the outer wall of the active rod.

[0014] The pre-top refrigerator upper shelf injection molding device described above: the composite groove includes a rotating groove and a vertical groove formed on the active rod.

[0015] As described above, the pre-top refrigerator upper shelf injection molding device includes a lifting structure comprising a driven rod rotatably mounted on the storage cavity, the driven rod being connected to the driving rod via a gear set, and a lifting sleeve being sleeved on the driven rod. A protruding post is formed on the inner wall of the lifting sleeve, the protruding post being slidably disposed in a spiral groove opened on the driven rod, and a lifting plate being fixedly disposed on the lifting sleeve. Four sets of suction rods are fixedly disposed on the lifting plate, and the four sets of suction rods are respectively slidably and sealingly connected to the four sets of ejection cavities.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] By setting up an ejection assembly and utilizing the cooperation between the ejector and the drive component, the ejector can have two stages of motion: the first stage ejects at a relatively fast speed to allow the injection molded part to quickly break through the mold clamping force; the second stage rises slowly to avoid surface damage to the injection molded part caused by excessively fast ejection. Compared with the traditional pneumatic or hydraulic control methods, it has higher stability, better response speed and accuracy.

[0018] Furthermore, during the ejection process, the suction component and the adsorption component work together to adsorb the injection molded part during the first stage of ejection. This allows the injection molded part to remain relatively stationary with the ejector and the adsorption component as it breaks through the mold clamping force, effectively preventing the injection molded part from bouncing when breaking through the mold clamping force. This ensures that the injection molded part can be stably separated from the mold cavity, thereby improving product quality. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the injection molding device for the upper shelf of a pre-top refrigerator.

[0020] Figure 2 This is a schematic diagram of the injection mold in the injection molding device for the upper shelf of a pre-top refrigerator.

[0021] Figure 3 This is a schematic diagram of the storage cavity in the injection molding device of the upper shelf of a pre-top refrigerator.

[0022] Figure 4 This is a schematic diagram of the ejector assembly in the injection molding device for the upper shelf of a pre-top refrigerator.

[0023] Figure 5 This is a schematic diagram of the suction component in the injection molding device for the upper shelf of a pre-top refrigerator.

[0024] Figure 6 This is a schematic diagram of the structure of the drive component and the ejector component cooperating in the injection molding device for the upper shelf of a pre-top refrigerator.

[0025] Figure 7 This is a schematic diagram of the adsorption component in the injection molding device for the upper shelf of a pre-top refrigerator.

[0026] Figure 8 This is a schematic diagram of the suction component in the injection molding device for the upper shelf of a pre-top refrigerator.

[0027] In the diagram: 1. Injection molding machine; 101. Injection chamber; 2. Injection mold; 201. Moving mold; 202. Fixed mold; 203. Storage cavity; 204. Mold cavity; 3. First ejector hole; 4. Second ejector hole; 5. Ejector rod; 6. Ejector cavity; 7. Drive rod; 701. First threaded groove; 702. Second threaded groove; 8. Socket ring; 801. First protrusion; 9. Lifting sleeve; 901. Protrusion; 10. Suction rod; 11. Lifting plate; 12. Drive rod; 1201. Rotary groove; 1202. Vertical groove; 13. Driven rod; 1301. Spiral groove; 14. Socket ring; 1401. Second protrusion; 15. Gear set. Detailed Implementation

[0028] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0029] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0030] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented even without certain specific details. In some instances, methods, means, and elements well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0031] Please see Figures 1-8 In this embodiment of the present invention, a pre-top refrigerator upper shelf injection molding device includes:

[0032] Injection molding machine 1, the injection molding chamber 101 of the injection molding machine 1 is provided with an injection mold 2, the injection mold 2 includes a moving mold 201 and a fixed mold 202;

[0033] Specifically, please refer to Figure 3 The fixed mold 202 is provided with a mold cavity 204. During injection molding, the moving mold 201 is controlled by the control system of the injection molding machine 1. It first closes with the fixed mold 202. Then, the injection liquid enters the mold cavity 204 through the moving mold 201. After cooling and solidification, the control system controls the moving mold 201 to perform the mold separation action, thereby producing the refrigerator upper partition.

[0034] The fixed mold 202 is provided with a storage cavity 203, and an ejection assembly is provided in the storage cavity 203. The ejection assembly includes an ejector and a driving member that are slidably disposed on the fixed mold 202. When the driving member is activated, it can drive the ejector to slide relative to the fixed mold 202.

[0035] The ejector includes an ejector rod 5 that is slidably disposed on the fixed mold 202. The ejector rod 5 is evenly distributed in four groups. The four groups of ejector rods 5 are fixed to each other and slidably disposed in the first ejection hole 3 opened on the fixed mold 202.

[0036] The driving components are provided in four sets, and the four sets of driving components are respectively engaged with a corresponding set of ejector rods 5. Each set of driving components includes a driving rod 7 rotatably mounted on the storage cavity 203. A sleeve ring 8 fixedly connected to the ejector rod 5 is sleeved on the driving rod 7. A first protrusion 801 is formed on the inner wall of the sleeve ring 8. The first protrusion 801 is slidably disposed in a fitting groove opened on the outer wall of the driving rod 7.

[0037] In detail, the aforementioned drive rod 7 is communicatively connected to the control system of the injection molding machine 1. After injection molding is completed and the moving mold 201 separates from the fixed mold 202, the control system drives the four sets of drive rods 7 to continue to rotate synchronously. Subsequently, with the cooperation of the first protrusion 801 and the fitting groove, the sleeve ring 8 can drive the ejector rod 5 to move upward along the first ejector hole 3, thereby pushing the upper partition plate that has been injected out of the mold cavity 204, thereby realizing the separation of the upper partition plate from the injection mold 2.

[0038] The fitting groove includes a first threaded groove 701 and a second threaded groove 702 formed on the drive rod 7;

[0039] In particular, please see Figure 4 , Figure 6 The pitch of the second threaded groove 702 is greater than that of the first threaded groove 701. In the initial state, the sleeve ring 8 is far away from the fixed mold 202. At this time, the upper end of the ejector rod 5 is flush with the injection surface of the fixed mold 202. When the drive rod 7 is controlled by the control system to rotate at a constant speed, the speed at which the first protrusion 801 and the second threaded groove 702 cooperate to drive the sleeve ring 8 to rise and fall is greater than the speed at which the first protrusion 801 and the first threaded groove 701 cooperate to drive the sleeve ring 8 to rise and fall. That is, the first stage ejection speed is faster so that the injection molded part can quickly break through the mold clamping force. The second stage ejection speed is appropriately reduced to avoid damage to the injection molded part due to excessive speed. This effectively avoids defects such as warping, cracking and whitening of the injection molded part during demolding, thereby improving the quality of the finished product.

[0040] Further, please refer to Figure 5 , Figure 6 , Figure 7 , Figure 8The ejector is also provided with an adsorption component, which cooperates with the suction assembly provided on the placement cavity 203. When the ejector slides relative to the fixed mold 202, the suction assembly can first fix the position of the adsorption component so that the adsorption component adsorbs the injection molded part, and then drive the adsorption component to move synchronously with the ejector.

[0041] Specifically, the adsorption member includes an ejection cavity 6 fixedly connected to the ejection rod 5. The ejection cavities 6 are distributed in four groups at equal intervals along the axis of the fixed mold 202. The four groups of ejection cavities 6 are fixed to the ejection rod 5, and the ejection cavities 6 are slidably disposed in the second ejection hole 4 opened on the fixed mold 202.

[0042] The suction assembly includes an active structure and a lifting structure. The active structure includes a sleeve 14 fixedly connected to the ejection cavity 6 and an active rod 12 rotatably mounted on the storage cavity 203. The sleeve 14 is sleeved on the active rod 12, and a second protrusion 1401 is formed on the inner wall of the sleeve 14. The second protrusion 1401 is slidably disposed in a composite groove opened on the outer wall of the active rod 12.

[0043] Specifically, please refer to Figure 8 The composite groove includes a rotating groove 1201 and a vertical groove 1202 formed on the active rod 12;

[0044] The lifting structure includes a driven rod 13 rotatably mounted on the storage cavity 203. The driven rod 13 is connected to the driving rod 12 through a gear set 15. A lifting sleeve 9 is sleeved on the driven rod 13. A protruding post 901 is formed on the inner wall of the lifting sleeve 9. The protruding post 901 is slidably disposed in a spiral groove 1301 opened on the driven rod 13. A lifting plate 11 is fixedly disposed on the lifting sleeve 9. Four sets of suction rods 10 are fixedly disposed on the lifting plate 11. The four sets of suction rods 10 are respectively sealed and slidably connected to the four sets of ejection cavities 6.

[0045] Specifically, please refer to Figure 5 , Figure 8 The gear set 15 includes a first gear and a second gear. The first gear is coaxially fixed with the driving rod 12, and the second gear is coaxially fixed with the driven rod 13.

[0046] In the initial state, the ejector rod 5 and the ejector cavity 6 are submerged in the fixed mold 202. When the drive rod 7 is driven by the control system to rapidly rise the ejector rod 5, the sleeve 14 rises along the axial direction of the drive rod 12. During this process, the second protrusion 1401 first slides in the vertical groove 1202, and the drive rod 12 and the driven rod 13 remain stationary. At this time, the ejector cavity 6 rises relative to the suction rod 10, and a negative pressure is formed in the ejector cavity 6, so that the ejector cavity 6 rises with the ejector rod 5. During ejection, a certain suction force is generated on the injection molded part to prevent it from bouncing at the moment it breaks through the mold clamping force, thus keeping the injection molded part and the ejector rod 5 in a relatively stationary state, thereby improving the product quality of the injection molded part. When the ejector rod 5 rises at a relatively slow speed, the second protrusion 1401 engages with the rotating groove 1201. At this time, as the ejector rod 5 continues to rise, the second protrusion 1401 and the rotating groove 1201 cooperate to force the drive rod 12 to rotate clockwise (see reference). Figure 8 (Description), then the first gear and the second gear enter a meshing transmission state, driving the driven rod 13 to rotate counterclockwise; during this process, the spiral groove 1301 cooperates with the protrusion 901, which can force the lifting sleeve 9 to drive the lifting plate 11 and the suction rod 10 to rise along the axial direction of the driven rod 13.

[0047] Specifically, the pitch of the spiral groove 1301 is the same as the pitch of the first threaded groove 701; therefore, the speed at which the lifting sleeve 9 drives the suction rod 10 to rise is the same as the speed at which the second ejector rod 5 rises. That is, during the rising process of the second ejector rod 5, the suction rod 10 and the ejector cavity 6 remain relatively stationary, so that the suction force of the ejector cavity 6 on the injection molded part will not increase during the second ejection process, thereby facilitating the subsequent material handling structure set in the injection molding chamber 101 to handle the injection molded part.

[0048] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0049] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A pre-top refrigerator upper shelf injection molding device, comprising: Injection molding machine (1), wherein an injection mold (2) is provided in the injection chamber (101) of the injection molding machine (1), the injection mold (2) including a moving mold (201) and a fixed mold (202); characterized in that: The fixed mold (202) is provided with a storage cavity (203), and an ejection assembly is provided in the storage cavity (203). The ejection assembly includes an ejector part slidably disposed on the fixed mold (202) and a driving part. When the driving part is activated, it can drive the ejector part to slide relative to the fixed mold (202). The ejector is also provided with an adsorption component. The adsorption component cooperates with the suction assembly provided on the placement cavity (203). When the ejector slides relative to the fixed mold (202), the suction assembly can first fix the position of the adsorption component so that the adsorption component adsorbs the injection molded part, and then drive the adsorption component to move synchronously with the ejector.

2. The pre-top refrigerator upper shelf injection molding device according to claim 1, characterized in that, The ejector includes ejector rods (5) that are slidably disposed on the fixed mold (202). There are four sets of ejector rods (5) evenly distributed. The four sets of ejector rods (5) are fixed to each other and slidably disposed in the first ejector hole (3) opened on the fixed mold (202).

3. The pre-top refrigerator upper shelf injection molding device according to claim 2, characterized in that, The adsorption component includes an ejection cavity (6) fixedly connected to the ejection rod (5). The ejection cavities (6) are distributed in four groups at equal intervals along the axis of the fixed mold (202). The four groups of ejection cavities (6) are fixed to the ejection rod (5), and the ejection cavities (6) are slidably disposed in the second ejection hole (4) opened on the fixed mold (202).

4. The pre-top refrigerator upper shelf injection molding device according to claim 2, characterized in that, The driving components are provided in four sets, and the four sets of driving components are respectively engaged with the corresponding set of ejector rods (5). Each set of driving components includes a driving rod (7) rotatably mounted on the storage cavity (203). A sleeve ring (8) fixedly connected to the ejector rod (5) is sleeved on the driving rod (7). A first protrusion (801) is formed on the inner wall of the sleeve ring (8). The first protrusion (801) is slidably disposed in the fitting groove opened on the outer wall of the driving rod (7).

5. The pre-top refrigerator upper shelf injection molding device according to claim 4, characterized in that, The fitting groove includes a first threaded groove (701) and a second threaded groove (702) formed on the drive rod (7).

6. The pre-top refrigerator upper shelf injection molding device according to claim 3, characterized in that, The suction assembly includes an active structure and a lifting structure. The active structure includes a sleeve (14) fixedly connected to the ejection cavity (6) and an active rod (12) rotatably mounted on the storage cavity (203). The sleeve (14) is sleeved on the active rod (12), and a second protrusion (1401) is formed on the inner wall of the sleeve (14). The second protrusion (1401) is slidably disposed in a composite groove opened on the outer wall of the active rod (12).

7. The pre-top refrigerator upper shelf injection molding device according to claim 6, characterized in that, The composite groove includes a rotating groove (1201) and a vertical groove (1202) formed on the active rod (12).

8. The pre-top refrigerator upper shelf injection molding device according to claim 6, characterized in that, The lifting structure includes a driven rod (13) rotatably mounted on the storage cavity (203). The driven rod (13) is connected to the driving rod (12) through a gear set (15). A lifting sleeve (9) is sleeved on the driven rod (13). A protrusion (901) is formed on the inner wall of the lifting sleeve (9). The protrusion (901) is slidably disposed in a spiral groove (1301) opened on the driven rod (13). A lifting plate (11) is fixedly disposed on the lifting sleeve (9). Four sets of suction rods (10) are fixedly disposed on the lifting plate (11). The four sets of suction rods (10) are respectively sealed and slidably connected to the four sets of ejection cavities (6).

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