Automatic injection molding device and method for washing machine door rings

Abstract

The present invention discloses an automatic injection molding device and method for a washing machine door ring, including an upper mold and a lower mold which are arranged separately up and down. The upper mold and the lower mold are configured to define a cavity adapted to the outer contour of the door ring. At least two glue inlets are opened on the upper mold, a runner communicated with the glue inlets is opened on the lower mold, and the other end of the runner is communicated with the cavity. One side of the upper mold is provided with a plugging component capable of plugging an insert into the cavity, and above the plugging component is provided with a feeding component for automatically feeding the insert. The other side of the upper mold is further provided with a pressing component for pressing the door ring on the lower mold after injection molding. The beneficial effects of the present invention are mainly reflected in: ingenious design, realizing full-automatic feeding of the insert, simple and convenient operation, high degree of automation, no need for manual operation throughout the process, reducing the working intensity, facilitating batch production, and not causing pollution to the insert, with wide applicability.

Description

Technical Field

[0001] The present invention relates to the technical field of injection molding, and in particular, to an automatic injection molding device and method for a washing machine door ring. Background Art

[0002] The door ring is a main component of a washing machine. When the existing mold is injection molding, the rubber material is only injected into the cavity of the inner ring through a single gate, and then the rubber material enters the periphery of the door ring through the cavity. Due to the large volume of the door ring, but with the requirements of being light and thin, etc., the rubber material flows into the cavity unevenly and is prone to blockage, which easily leads to insufficient injection molding, and the product is prone to defects and the yield is low. In addition, when the door ring is injection molded, an insert needs to be embedded in the door ring and integrally formed therewith. For example, the authorized patent No. CN208906580U discloses an injection mold for a workpiece with an embedded insert, including a front mold, a rear mold, and a side mold located between the front mold and the rear mold. The front mold, the rear mold, and the side mold cooperate with each other to form a cavity for injection molding of a plastic part; a clamping assembly for clamping the insert and placing it in the cavity is provided on the front mold; an adjustment assembly for driving the rear mold to adjust a micro-distance relative to the front mold is provided on the rear mold. However, the above requires manual handling of the insert to the clamping assembly, which is time-consuming and laborious, has a large working intensity, is not conducive to mass production, and is prone to contaminating the insert. Summary of the Invention

[0003] The object of the present invention is to overcome the deficiencies of the prior art and provide an automatic injection molding device and method for a washing machine door ring.

[0004] The object of the present invention is achieved by the following technical solutions:

[0005] An automatic injection molding device for a washing machine door ring, including an upper mold and a lower mold which are arranged up and down. The upper mold and the lower mold are configured to define a cavity adapted to the outer contour of the door ring. At least two glue inlets are opened on the upper mold, and a runner communicated with the glue inlets is opened on the lower mold. The other end of the runner is communicated with the cavity; on one side of the upper mold, there is a plugging component capable of plugging an insert into the cavity, and above the plugging component, there is a feeding component for automatically feeding the insert; on the other side of the upper mold, there is also a pressing component for pressing the door ring on the lower mold after injection molding.

[0006] Preferably, the plugging component at least includes a substrate fixed on the lower mold. A sliding block is slidably arranged between the substrates. One end of the sliding block close to the cavity is provided with a profiling block, and the profiling block is designed to be profiled with the plugging groove on the insert.

[0007] Preferably, a connecting block is screwed on the sliding block, and the connecting block is fixedly connected with the cylinder shaft of a driving cylinder.

[0008] Preferably, a support block is fixedly arranged on the lower die, a notch is formed in the support block, the substrate is placed in the notch, extension parts are arranged on both sides of the sliding block, the extension parts are placed in the notch, and the height of the extension parts is equal to the distance between the substrate and the inner wall of the support block.

[0009] Preferably, the feeding assembly includes a support frame and a vibrating disk arranged on the support frame for conveying the inserts, and the output end of the vibrating disk is connected with a bearing seat; above the bearing seat, a transfer assembly is arranged for clamping the inserts on the bearing seat into the mold cavity.

[0010] Preferably, the transfer assembly includes a fixing plate fixedly arranged on the support frame, and a U-shaped sliding groove is formed in the fixing plate; a sliding plate is slidably arranged on the fixing plate, a clamping cylinder is arranged on the sliding plate, and a chuck is fixedly arranged on the cylinder shaft of the clamping cylinder; a connecting pin is fixedly arranged on the sliding plate, and a roller is pivotally arranged on the connecting pin, and the roller extends into the sliding groove.

[0011] Preferably, a horizontal sliding rail is fixedly arranged on the fixing plate, a horizontal sliding block adapted to the horizontal sliding rail is arranged on the horizontal sliding rail, a vertical sliding block is fixedly arranged on the horizontal sliding block, and a sliding groove adapted to the vertical sliding rail is arranged on the vertical sliding block; the sliding plate is fixedly arranged on the vertical sliding rail.

[0012] Preferably, a servo motor is further fixedly arranged on the fixing plate, a cam follower is arranged on the motor shaft of the servo motor, and the roller is placed in the cam follower.

[0013] Preferably, the pressing assembly at least includes a pushing cylinder, a driving head is fixedly arranged on the cylinder shaft of the pushing cylinder, and a pressing block is fixedly arranged on the driving head.

[0014] An automatic injection molding method for a washing machine door ring includes the following steps:

[0015] S1. The vibrating disk is started to convey the inserts to the bearing seat. At the same time, the servo motor rotates forward, and the roller is driven to slide in the sliding groove through the cam follower. The roller slides and drives the sliding plate to slide horizontally on the horizontal sliding rail and vertically on the vertical sliding rail through the connecting pin until it slides to the bottom on one side of the sliding groove.

[0016] S2. The clamping cylinder is started to clamp the inserts through the chuck.

[0017] S3. The servo motor rotates forward, driving the roller to slide in the chute through the cam follower. The sliding of the roller drives the sliding plate to slide horizontally on the horizontal slide rail and vertically on the vertical slide rail through the connecting pin until it slides to the bottom on the other side of the chute. The clamping cylinder starts again, and the insert is placed at the profiling block.

[0018] S4. The driving cylinder starts, driving the profiling block to move forward through the connecting block and the sliding block until it moves to the predetermined position, and then driving the upper mold to move downward until it is in close contact with the lower mold, completing the mold closing step.

[0019] S5. Injection molding is carried out from the glue inlet until the door ring is injection molded in the cavity.

[0020] The beneficial effects of the present invention are mainly reflected in:

[0021] 1. Ingenious design, realizing the full-automatic feeding of the insert, with simple and convenient operation, high degree of automation, no manual operation required throughout the process, reducing the labor intensity, facilitating batch production, and not polluting the insert, having wide applicability.

[0022] 2. The setting of multiple glue inlets can control the opening time and sequence of each glue inlet as needed, making the glue distribution uniform, which is beneficial to evenly filling the glue around the relatively large thin-walled door ring, with a high yield rate and a beautiful appearance of the door ring.

[0023] 3. One servo motor can drive the roller to reciprocate, with stable and reliable movement, strong reliability, low cost, easy maintenance, and greatly reducing the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The technical solution of the present invention will be further described below in conjunction with the drawings:

[0025] Figure 1 : The perspective view of the preferred embodiment of the present invention. At this time, the feeding component is removed.

[0026] Figure 2 : The perspective view of the preferred embodiment of the present invention. At this time, the feeding component and the upper mold are removed.

[0027] Figure 3 : The perspective view of the feeding component in the preferred embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0028] The present invention will be described in detail below in conjunction with the specific embodiments shown in the drawings. However, these embodiments are not limited to the present invention, and any structural, method, or functional transformation made by those of ordinary skill in the art based on these embodiments is included in the protection scope of the present invention.

[0029] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0030] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific circumstances.

[0031] The present invention will be described in detail below with reference to the drawings and in conjunction with embodiments.

[0032] As Figures 1 to 3 shown, the present invention discloses an automatic injection molding device for a washing machine door ring, which includes an upper mold 1 and a lower mold 2 arranged vertically up and down. The upper mold 1 and the lower mold 2 are configured to define a cavity 3 adapted to the outer contour of the door ring 100. At least two glue inlets 11 are opened on the upper mold 1, and a runner communicating with the glue inlets 11 is opened on the lower mold 2. The other end of the runner communicates with the cavity 3. In this preferred embodiment, three such glue inlets are provided on the upper mold 1. Of course, other numbers of glue inlets can also be provided and can be adjusted accordingly according to actual needs, all of which fall within the protection scope of the present invention and will not be elaborated here. The setting of multiple glue inlets can control the opening time and sequence of each glue inlet as needed, making the glue material evenly distributed, which is beneficial to evenly filling the glue material around the relatively large thin-walled door ring, with a high yield rate and a beautiful appearance of the door ring.

[0033] One side of the upper mold 1 is provided with a plugging component 5 that can plug the insert 200 into the cavity 3, and above the plugging component 5 is provided with a feeding component 6 for automatically feeding the insert 200. The plugging component 5 at least includes a substrate 51 fixed on the lower mold 2. A sliding block 53 is slidably arranged between the substrates 51. One end of the sliding block 53 close to the cavity 3 is provided with a profiling block 54, and the profiling block 54 is designed to be profiled with the plugging groove on the insert 200. A connecting block 55 is screwed on the sliding block 53, and the connecting block 55 is fixedly connected to the cylinder shaft of a driving cylinder (not shown in the figure).

[0034] A support block 56 is fixed on the lower mold 2, and a notch 57 is formed on the support block 56. The substrate 51 is placed in the notch 57. Extension parts 58 are arranged on both sides of the sliding block 53, and the extension parts 58 are placed in the notch 57, and the height of the extension parts 58 is equal to the distance between the substrate 51 and the inner wall of the support block 56. The above settings can ensure the stability of the sliding of the sliding block 53, thereby reducing errors and improving the yield rate, and having a wide range of applicability.

[0035] 4. In the above, the feeding component 6 includes a support frame 61 and a vibrating disk (not shown in the figure) arranged on it for conveying the insert 200. The structure of the vibrating disk is prior art, and the present invention will not elaborate too much here. The output end of the vibrating disk is connected to a bearing seat 62, and a bearing groove adapted to the insert 200 is formed on the bearing seat 62. Above the bearing seat 62 is provided with a transfer component 63 for clamping the insert 200 on it into the cavity 3. The transfer component 63 includes a fixing plate 631 fixed on the support frame 61, and a U-shaped sliding groove 632 is formed on the fixing plate 631; A sliding plate 630 is slidably arranged on the fixing plate 631. A clamping cylinder 639 is arranged on the sliding plate 630, and a chuck 638 is fixedly connected to the cylinder shaft of the clamping cylinder 639; A connecting pin 633 is fixed on the sliding plate 630, and a roller is pivotally arranged on the connecting pin 633, and the roller extends into the sliding groove 632. A servo motor 6311 is also fixed on the fixing plate 631, and a cam follower is arranged on the motor shaft of the servo motor 6311, and the roller is placed in the cam follower. One servo motor can drive the roller to reciprocate, with stable and reliable movement, strong reliability, low cost, and easy maintenance, greatly reducing the cost.

[0036] A horizontal sliding rail 634 is fixed on the fixing plate 631, and a horizontal sliding block 635 adapted to it is arranged on the horizontal sliding rail 634. A vertical sliding block 636 is fixed on the horizontal sliding block 635, and a sliding groove adapted to a vertical sliding rail 637 is arranged on the vertical sliding block 636; The vertical sliding rail 637 is fixed with the sliding plate 630.

[0037] On the other side of the upper mold 1, there is also a pressing assembly 7 for pressing the door ring 100 against the lower mold 2 after injection molding. The pressing assembly 7 at least includes a pushing cylinder 71. A driving head 72 is fixed on the cylinder shaft of the pushing cylinder 71, and a pressing block 73 is fixed on the driving head 72. The pressing block can prevent the door ring from moving together with the upper mold during demolding after injection molding, playing a protective role.

[0038] The working process of the present invention is briefly described below, including the following steps:

[0039] S1. The vibrating disk is started, and the insert 200 is conveyed to the bearing seat 62. At the same time, the servo motor 6311 rotates forward, driving the roller to slide in the chute 632 through the cam follower. The sliding of the roller drives the sliding plate 630 to slide horizontally on the horizontal slide rail 634 and vertically on the vertical slide rail 637 through the connecting pin 633 until it slides to the bottom on one side of the chute 632.

[0040] S2. The clamping cylinder 639 is started, and the insert 200 is clamped by the chuck 638.

[0041] S3. The servo motor 6311 rotates forward, driving the roller to slide in the chute 632 through the cam follower. The sliding of the roller drives the sliding plate 630 to slide horizontally on the horizontal slide rail 634 and vertically on the vertical slide rail 637 through the connecting pin 633 until it slides to the bottom on the other side of the chute 632. The clamping cylinder 639 is started again, and the insert 200 is placed at the profiling block 54.

[0042] S4. The driving cylinder is started, and the profiling block 54 is driven to move forward through the connecting block 55 and the sliding block 53 until it moves to a predetermined position. Then, the upper mold 1 is driven to move downward until it is in close contact with the lower mold 2, completing the mold closing step.

[0043] S5. Injection molding is carried out from the glue inlet 11 until the door ring 100 is injection molded in the cavity 3.

[0044] It should be understood that although this specification is described according to the embodiments, not each embodiment only includes an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard 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.

[0045] The series of detailed descriptions listed above are only specific descriptions of the feasible embodiments of the present invention, and they are not intended to limit the protection scope of the present invention. Any equivalent embodiments or changes made without departing from the technical spirit of the present invention should be included within the protection scope of the present invention.

Claims

1. Automatic injection molding device for washing machine door rings, including an upper mold (1) and a lower mold (2) arranged separately above and below, the upper mold (1) and the lower mold (2) are configured to define a cavity (3) adapted to the outer contour of the door ring (100), characterized in that: At least two glue inlets (11) are provided on the upper mold (1), a runner communicating with the glue inlets (11) is provided on the lower mold (2), and the other end of the runner communicates with the cavity (3); on one side of the upper mold (1), there is a plugging component (5) capable of plugging an insert (200) into the cavity (3), and above the plugging component (5), there is a feeding component (6) for automatically feeding the insert (200); on the other side of the upper mold (1), there is also a pressing component (7) for pressing the door ring (100) onto the lower mold (2) after injection molding is completed. The plugging component (5) at least includes a substrate (51) fixed on the lower mold (2), a sliding block (53) is slidably arranged between the substrates (51), and a profiling block (54) is arranged at one end of the sliding block (53) close to the cavity (3), and the profiling block (54) is designed in a profiling manner with the plugging groove on the insert (200). The feeding component (6) includes a support frame (61) and a vibrating disk arranged on it for conveying the insert (200), and the output end of the vibrating disk is connected to a bearing seat (62); above the bearing seat (62), there is a transfer component (63) for clamping the insert (200) on it into the cavity (3).

2. The automatic injection molding device for the washing machine door ring according to claim 1, wherein: A connecting block (55) is screwed on the sliding block (53), and the connecting block (55) is fixedly connected to the cylinder shaft of a driving cylinder.

3. The automatic injection molding device for the washing machine door ring according to claim 1, characterized in that: A support block (56) is fixed on the lower mold (2), a notch (57) is opened on the support block (56), the substrate (51) is placed in the notch (57), extension parts (58) are arranged on both sides of the sliding block (53), the extension parts (58) are placed in the notch (57), and the height of the extension parts (58) is equal to the distance between the substrate (51) and the inner wall of the support block (56).

4. The automatic injection molding device for the washing machine door ring according to claim 2, wherein: The transfer component (63) includes a fixing plate (631) fixed on the support frame (61), and a U-shaped sliding groove (632) is opened on the fixing plate (631); a sliding plate (630) is slidably arranged on the fixing plate (631), a clamping cylinder (639) is arranged on the sliding plate (630), and a chuck (638) is fixedly connected to the cylinder shaft of the clamping cylinder (639); a connecting pin (633) is fixed on the sliding plate (630), and a roller is pivotally arranged on the connecting pin (633), and the roller extends into the sliding groove (632).

5. The automatic injection molding device for the washing machine door ring according to claim 4, characterized in that: A horizontal sliding rail (634) is fixed on the fixing plate (631), a horizontal sliding block (635) adapted to it is arranged on the horizontal sliding rail (634), a vertical sliding block (636) is fixed on the horizontal sliding block (635), and a sliding groove adapted to a vertical sliding rail (637) is arranged on the vertical sliding block (636); the sliding plate (630) is fixed on the vertical sliding rail (637).

6. The automatic injection molding device for the washing machine door ring according to claim 5, characterized in that: A servo motor (6311) is also fixedly installed on the fixed plate (631). A cam follower is provided on the motor shaft of the servo motor (6311), and the roller is placed inside the cam follower.

7. The automatic injection molding device for the washing machine door ring according to claim 5, characterized in that: The pressing assembly (7) at least includes a pushing cylinder (71). A driving head (72) is fixedly installed on the cylinder shaft of the pushing cylinder (71), and a pressing block (73) is fixedly installed on the driving head (72).

8. The automatic injection molding method of the automatic injection molding device for the washing machine door ring according to claim 6, characterized in that, It includes the following steps: S1. The vibrating bowl is started, and the insert (200) is conveyed to the bearing seat (62). At the same time, the servo motor (6311) rotates forward, and the roller is driven to slide in the chute (632) through the cam follower. The sliding of the roller drives the sliding plate (630) to slide horizontally on the horizontal slide rail (634) and vertically on the vertical slide rail (637) through the connecting pin (633) until it slides to the bottom on one side of the chute (632). S2. The clamping cylinder (639) is started, and the insert (200) is clamped by the chuck (638). S3. The servo motor (6311) rotates forward, and the roller is driven to slide in the chute (632) through the cam follower. The sliding of the roller drives the sliding plate (630) to slide horizontally on the horizontal slide rail (634) and vertically on the vertical slide rail (637) through the connecting pin (633) until it slides to the bottom on the other side of the chute (632). The clamping cylinder (639) is started again, and the insert (200) is placed at the profiling block (54). S4. The driving cylinder is started, and the profiling block (54) is driven to move forward through the connecting block (55) and the sliding block (53). After moving to the predetermined position, the upper mold (1) is driven to move downward until it is in close contact with the lower mold (2), completing the mold closing step. S5. Injection molding is carried out from the glue inlet (11) until the door ring (100) is injection molded in the cavity (3).

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