Secondary ejection mechanism for washing machine frame injection mold

Abstract

The utility model belongs to mould technical field relates to a washing machine surround frame injection mold secondary ejection mechanism. The utility model, including washing machine surround frame forming lower mould and washing machine surround frame forming upper mould, be equipped with injection molding shunt spare above washing machine surround frame forming upper mould, be equipped with washing machine surround frame forming inlay seat in washing machine surround frame forming lower mould. The plastic part secondary combination formula ejection structure of utility model adopts the staggered layout of inclined top piece and straight top piece, realizes the stable separation of buckle, guarantees the uniform stress of surround frame integral ejection, effectively avoids the deformation of plastic part, buckle damage, promotes the product pass rate.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology and relates to a secondary ejection mechanism for a washing machine frame injection mold. Background Technology

[0002] As a key structural component of washing machines, the washing machine frame is ring-shaped with multiple clips, slots, and side grooves. Precise demolding after injection molding is crucial to ensure product accuracy and integrity. Existing washing machine frame injection molds generally suffer from the following problems: First, the frame clips fit tightly against the mold's forming surface, making single ejection prone to clip breakage or deformation; second, uneven stress distribution in the middle, edges, and slots of the frame easily leads to warping and surface scratches during ejection; third, traditional secondary ejection mechanisms often employ a separate design, resulting in large clearances between components and poor coordination of ejection actions, leading to low demolding efficiency and low product yield. Therefore, there is an urgent need to design a secondary ejection mechanism for washing machine frame injection molds that can overcome these shortcomings.

[0003] To overcome the shortcomings of existing technologies, people have continuously explored and proposed various solutions. For example, a Chinese patent discloses a washing machine panel injection mold and injection molding process [Application No.: 201710645256.1], which includes a base and a top plate. The base is located directly below the top plate. Vertically arranged cylinders and support columns are respectively installed on both sides of the top of the base. The piston rod of the cylinder is fixedly connected to the top plate. The support column has a hollow structure, and cooling pipes and return pipes are respectively arranged inside the support column. A horizontally arranged first mold base is provided at the top of the support column. A first molding groove is opened at the top of the first mold base, and a molding plate is provided in the first molding groove. A cooling cavity is also provided on the first mold base. A second mold base is provided at the middle of the bottom of the top plate. Both the top plate and the second mold base have interconnected injection ports. A second molding groove is opened at the bottom of the second mold base, and the second molding groove is connected to the injection port. However, this solution is still prone to defects such as ejection damage, uneven force distribution, and low efficiency during use. Summary of the Invention

[0004] The purpose of this utility model is to address the above-mentioned problems by providing a secondary ejection mechanism for the injection mold of a washing machine frame.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A secondary ejection mechanism for a washing machine frame injection mold includes a lower mold for forming the washing machine frame and an upper mold for forming the washing machine frame. An injection manifold is located above the upper mold. A molding insert for forming the washing machine frame is located within the lower mold. The molding insert contains a lower portion of the washing machine frame. The upper mold contains an upper portion of the washing machine frame and a molding plate. The upper portion of the washing machine frame and the molding plate correspond in position and shape to the lower portion of the washing machine frame. A secondary ejection structure for the plastic part is located below the lower mold and passes through the molding insert.

[0006] In the above-mentioned secondary ejection mechanism for the injection mold of the washing machine frame, the secondary combined ejection structure of the plastic part includes an ejector rod connecting slide plate disposed below the lower mold of the washing machine frame forming. The ejector rod connecting slide plate is provided with a washing machine frame snap-fit ​​forming inclined ejector and a straight ejector, which are staggered.

[0007] In the above-mentioned secondary ejection mechanism for the injection mold of the washing machine frame, the washing machine frame snap-fit ​​forming inclined ejector includes two inclined ejector rods disposed on the ejector rod connecting slide plate, the top of the inclined ejector rods is provided with a snap-fit ​​forming block, and the snap-fit ​​forming block extends into the washing machine frame forming insert.

[0008] In the above-mentioned secondary ejection mechanism of the washing machine frame injection mold, the ejector rod connecting slide plate is provided with two inclined ejector rod connecting slides, and the bottom of the inclined ejector rod is slidably engaged with the inclined ejector rod connecting slide.

[0009] In the above-mentioned secondary ejection mechanism of the washing machine frame injection mold, the straight ejector includes several central straight ejector rods disposed on the ejector rod connecting slide plate. The central straight ejector rods pass through into the washing machine frame forming insert, and the central straight ejector rods and the inclined ejector rods are arranged alternately.

[0010] In the above-mentioned secondary ejection mechanism for the injection mold of the washing machine frame, the ejector rod connecting slide plate is also provided with several vertical rods, and the top of the vertical rods is provided with a washing machine frame hole groove forming shaft.

[0011] In the above-mentioned secondary ejection mechanism for the washing machine frame injection mold, the diameter of the forming shaft of the washing machine frame hole groove is smaller than the diameter of the vertical rod.

[0012] In the above-mentioned secondary ejection mechanism for the injection mold of the washing machine frame, the ejector connecting slide is also provided with several rear straight ejector rods, and the top of the rear straight ejector rods is provided with an auxiliary forming block for the side groove of the washing machine frame.

[0013] In the above-mentioned secondary ejection mechanism of the washing machine frame injection mold, the injection diversion component includes an injection main board disposed above the upper mold of the washing machine frame forming, and an injection diversion plate is provided below the injection main board.

[0014] In the above-mentioned secondary ejection mechanism of the washing machine frame injection mold, a fixing frame for fixing the injection diverter plate is provided between the injection main board and the upper mold of the washing machine frame.

[0015] Compared with existing technologies, the advantages of this utility model are: 1. The secondary assembly ejection structure of the plastic parts in this utility model adopts an alternating layout of inclined ejection parts and straight ejection parts, which not only achieves smooth release of the buckle, but also ensures that the overall frame is ejected with uniform force, effectively avoiding deformation of the plastic parts and damage to the buckle, and improving the product qualification rate.

[0016] 2. In this utility model, the inclined push rod and the inclined push rod connecting slide are slidably fitted, the vertical rod is adapted to the size of the forming shaft of the washing machine frame hole groove, the fit of each component is high, the movement is smooth and without interference, the mold wear is reduced, and the service life is extended.

[0017] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a partial structural schematic diagram of the present invention.

[0020] Figure 3 This is a partial structural schematic diagram of another aspect of this utility model.

[0021] Figure 4 This is a partial structural schematic diagram of another aspect of this utility model.

[0022] Figure 5 This is a schematic diagram of the upper mold for forming the frame of a washing machine.

[0023] In the diagram: 1. Washing machine frame forming lower mold; 2. Washing machine frame forming upper mold; 3. Injection molding diverter; 4. Washing machine frame forming insert; 5. Washing machine frame lower part; 6. Washing machine frame upper part; 7. Washing machine frame forming insert; 8. Plastic part secondary assembly ejection structure; 9. Ejector rod connecting slide plate; 10. Washing machine frame snap-fit ​​forming slanted ejector; 11. Straight ejector; 12. Slanted ejector rod; 13. Snap-fit ​​forming block; 14. Slanted ejector rod connecting slide; 15. Middle straight ejector rod; 16. Washing machine frame hole groove forming shaft; 17. Rear straight ejector rod; 18. Washing machine frame side groove auxiliary forming block; 19. Injection molding main board; 20. Injection molding diverter plate; 21. Fixed frame; 22. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] like Figure 1-5 As shown, a secondary ejection mechanism for a washing machine frame injection mold includes a lower mold 1 for forming the washing machine frame and an upper mold 2 for forming the washing machine frame. An injection manifold 3 is provided above the upper mold 2. A washing machine frame forming insert 4 is provided inside the lower mold 1, and a lower part 5 of the washing machine frame is located within the insert 4. An upper part 6 and a forming plate 7 of the washing machine frame are located inside the upper mold 2. The upper part 6 and the forming plate 7 correspond to the lower part 5 of the washing machine frame and are shaped accordingly. A secondary ejection structure 8 for plastic parts is provided below the lower mold 1, and the secondary ejection structure 8 passes through the molding insert 4.

[0026] In this embodiment, the upper mold 2 and the lower mold 1 of the washing machine frame are closed in a corresponding manner. The washing machine frame forming insert is fixed inside the lower mold 1. The lower part 5 of the washing machine frame is the forming cavity of the washing machine frame forming insert 4. The upper part 6 of the washing machine frame and the forming plate 7 of the washing machine frame are both disposed inside the upper mold 2 of the washing machine frame, and their positions are precisely corresponding to the lower part 5 of the washing machine frame and their shapes are perfectly matched, together forming a complete washing machine frame forming cavity. The injection molding diverter 3 is installed above the upper mold 2 of the washing machine frame to be used for... Molten material is introduced into the molding cavity; the secondary assembly ejection structure 8 is set below the lower mold 1 of the washing machine frame molding and passes through the molding insert 4 of the washing machine frame, extending to the bottom of the molding cavity. After injection molding is completed, the ejection action is performed. Through the precise cooperation of the upper and lower molds, inserts, and plates, the overall molding accuracy of the washing machine frame is ensured; the injection flow divider 3 realizes the uniform distribution of molten material and avoids molding defects; the design of the secondary assembly ejection structure 8 through the insert allows it to act directly on the bottom of the plastic part, providing stable support for secondary ejection and solving the problem of poor force transmission in traditional ejection mechanisms.

[0027] Combination Figure 1-5 As shown, the secondary assembly ejection structure 8 of the plastic part includes an ejector rod connecting slide plate 9 disposed below the lower mold 1 for forming the washing machine frame. The ejector rod connecting slide plate 9 is provided with a washing machine frame snap-fit ​​forming inclined ejector 10 and a straight ejector 11, which are staggered.

[0028] Specifically, the inclined ejector 10 and the straight ejector 11 of the washing machine frame are both fixedly installed on the upper surface of the ejector rod connecting slide plate 9. The two are staggered along the length of the ejector rod connecting slide plate 9 and extend vertically upwards. Corresponding to different forming areas of the washing machine frame, the ejector rod connecting slide plate 9 can move up and down in the vertical direction, driving the inclined ejector 10 and the straight ejector 11 of the washing machine frame to rise and fall synchronously, realizing the ejection action. The ejector rod connecting slide plate 9 provides a unified installation benchmark for the inclined ejector and the straight ejector, ensuring the synchronization of their movements. The staggered layout avoids mutual interference between the two during the ejection process, and at the same time, it disperses the ejection force to different areas of the plastic part, improving the ejection stability.

[0029] The washing machine frame snap-fit ​​inclined top part 10 includes two inclined top rods 12 disposed on the top rod connecting slide plate 9. The top of the inclined top rod 12 is provided with a snap-fit ​​forming block 13, and the snap-fit ​​forming block 13 extends into the washing machine frame forming insert 4.

[0030] In this embodiment, the snap-fit ​​forming block 13 is fixedly installed on the top of the inclined push rod 12, and the shape of the snap-fit ​​forming block 13 is adapted to the snap-fit ​​structure of the washing machine frame. The inclined push rod 12 is inclined, and the snap-fit ​​forming block 13 at its top penetrates the side wall of the washing machine frame forming insert 4 and extends into the forming cavity inside the washing machine frame forming insert 4, directly participating in the snap-fit ​​forming process. When the push rod connecting slide plate 9 rises, the inclined push rod 12 moves in the inclined direction, driving the snap-fit ​​forming block 13 to simultaneously achieve vertical rising and horizontal disengagement. The inclined design of the inclined push rod 12 enables the snap-fit ​​forming block 13 to simultaneously complete the two actions of "disengaging from the snap-fit ​​+ lifting the plastic part" when it is ejected, avoiding the snap-fit ​​from the forming block from getting stuck or pulled, effectively protecting the integrity of the snap-fit ​​structure. The two inclined push rods 12 act synchronously to ensure that the snap-fit ​​forming block 13 is subjected to balanced force and improve the snap-fit ​​forming accuracy.

[0031] Combination Figure 3 , Figure 4 As shown, the push rod connecting slide plate 9 is provided with two inclined push rod connecting slides 14, and the bottom of the inclined push rod 12 slides in cooperation with the inclined push rod connecting slide 14.

[0032] In this embodiment, the bottom of the inclined ejector rod 12 is engaged with the inclined ejector rod connecting slide 14 through a sliding structure. Specifically, the inclined ejector rod connecting slide 14 has a sliding groove adapted to the bottom of the inclined ejector rod 12. The bottom of the inclined ejector rod 12 is embedded in the sliding groove and can slide freely along the groove direction. When the ejector rod connecting slide 9 rises vertically, the inclined ejector rod 12 moves stably along the inclined direction under the limiting effect of the sliding groove. The sliding engagement structure reduces the friction loss between the inclined ejector rod 12 and the connecting slide, ensuring the smoothness of the inclined ejector movement. The sliding groove plays a precise limiting role in the movement direction of the inclined ejector rod 12, preventing the inclined ejector rod 12 from deviating, ensuring the accuracy of the movement trajectory of the snap-fit ​​molding block 13, and improving the demolding stability.

[0033] The straight push member 11 includes a plurality of central straight push rods 15 disposed on the push rod connecting slide plate 9. The central straight push rods 15 penetrate into the washing machine frame forming insert 4, and the central straight push rods 15 and the inclined push rods 12 are arranged alternately.

[0034] In this embodiment, the top of the central straight push rod 15 vertically penetrates the bottom of the washing machine frame molding insert 4 and extends to the central area of ​​the molding cavity, corresponding to the central plane position of the washing machine frame. The central straight push rod 15 and the inclined push rod 12 are arranged in an alternating manner, that is, at least one central straight push rod 15 is provided between each two adjacent inclined push rods 12. The two do not overlap or interfere with each other in space. The central straight push rod 15 pushes out vertically, providing a uniform pushing force to the middle of the washing machine frame, avoiding warping deformation in the middle area due to insufficient force. The alternating arrangement makes the pushing forces of the inclined push rod 12 and the central straight push rod 15 complement each other, covering the entire bottom area of ​​the plastic part and improving the stability of pushing out.

[0035] Combination Figure 4 As shown, the top rod connecting slide plate 9 is also provided with several vertical rods 16, and the top of the vertical rods 16 is provided with a washing machine frame slot forming shaft 17.

[0036] In this embodiment, the washing machine frame slot forming shaft 17 is fixedly installed on the top of the vertical rod 16, and the washing machine frame slot forming shaft 17 extends upward in the vertical direction, passes through the washing machine frame forming insert 4, and extends into the forming cavity. Its shape is adapted to the slot structure on the washing machine frame and is used to form slots.

[0037] The diameter of the forming shaft 17 of the washing machine frame slot is smaller than the diameter of the vertical rod 16.

[0038] In this embodiment, the top of the vertical rod 16 is fixedly connected to the bottom of the washing machine frame slot forming shaft 17, and an annular stepped surface is formed at the connection. This stepped surface fits against the bottom end face of the washing machine frame forming insert 4, and plays a sealing and positioning role in the mold-closed state. The diameter difference design allows the washing machine frame slot forming shaft 17 to be accurately embedded into the forming cavity to form a slot, while the vertical rod 16 avoids the problem of insufficient rigidity caused by the excessive length of the forming shaft. The annular stepped surface ensures the sealing effect when the mold is closed, prevents molten material leakage, and improves the positioning accuracy of the forming shaft.

[0039] Combination Figure 1-5 As shown, the top rod connecting slide plate 9 is also provided with a number of rear straight top rods 18, and the top of the rear straight top rod 18 is provided with a washing machine frame side groove auxiliary forming block 19.

[0040] In this embodiment, the washing machine frame side groove auxiliary forming block 19 is fixedly installed on the top of the rear straight push rod 18, and its shape is adapted to the side groove structure of the washing machine frame; the rear straight push rod 18 drives the washing machine frame side groove auxiliary forming block 19 to pass through the washing machine frame forming insert 4, extend into the side groove area of ​​the forming cavity, participate in the side groove forming and perform the ejection action.

[0041] Combination Figure 1-5 As shown, the injection molding diversion component 3 includes an injection molding main board 20 disposed above the upper mold 2 for forming the washing machine frame, and an injection molding diversion plate 21 disposed below the injection molding main board 20.

[0042] In this embodiment, the injection molding manifold 21 is fixedly installed below the injection molding main board 20. The injection molding main board 20 has an injection inlet, and the injection molding manifold 21 has a manifold channel inside. The input end of the manifold channel is connected to the injection inlet, and the output end is connected to the inlet of the upper mold 2 for forming the washing machine frame.

[0043] Combination Figure 1-5 As shown, a fixing frame 22 for fixing the injection molding diversion plate 21 is provided between the injection molding main board 20 and the upper mold 2 for forming the washing machine frame.

[0044] In this embodiment, the top of the fixed frame 22 is fixedly connected to the bottom of the injection molding main board 20, and the bottom is fixedly connected to the top of the upper mold 2 for forming the washing machine frame. The injection molding diverter plate 21 is embedded in the internal cavity of the fixed frame 22, and axial positioning and radial fixation are achieved through the fixed frame 22.

[0045] The working principle of this utility model is as follows: During mold closing, the upper mold 2 and lower mold 1 of the washing machine frame precisely close, forming a complete molding cavity with the upper part 6, the molding panel 7, and the lower part 5 of the washing machine frame. The injection molding machine injects molten material through the feed port of the injection main plate 20. After being evenly distributed through the flow channel of the injection flow divider plate 21, the molten material flows into the molding cavity, filling all areas such as the snap-fit, holes, and side grooves, completing the injection molding. After injection molding, the mold is opened first, and the upper mold 2 and lower mold 1 of the washing machine frame separate. Subsequently, the ejector pin connecting slide plate 9 drives the secondary combination ejection structure 8 of the plastic part to move upward as a whole. Under the guidance of the ejector pin connecting slide plate 14, the inclined ejector pin 12 rises in the inclined direction, driving the snap-fit ​​molding block 13. Synchronous movement causes the snap-fit ​​molding block 13 to disengage obliquely from the snap-fit ​​structure of the washing machine frame, completing the non-destructive demolding of the snap-fit. After one ejection, the ejector rod connected to the slide plate 9 continues to move upward. The middle straight ejector rod 15, the vertical rod, and the rear straight ejector rod 18 rise synchronously. The middle straight ejector rod 15 pushes the middle plane of the washing machine frame, and the vertical rod drives the washing machine frame hole groove molding shaft 17 to disengage from the hole groove and push the plastic part. The rear straight ejector rod 18 pushes the side groove area through the washing machine frame side groove auxiliary molding block 19. The ejector rods work together to smoothly eject the washing machine frame plastic part from the molding cavity. After the plastic part is completely separated from the molding cavity, the ejector rod connected to the slide plate 9 drives the plastic part secondary combination ejection structure 8 to reset downward as a whole, waiting for the next mold closing injection, completing one work cycle.

[0046] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model.

[0047] Although this article frequently uses terms such as washing machine frame forming lower mold 1, washing machine frame forming upper mold 2, injection molding flow divider 3, washing machine frame forming insert 4, washing machine frame lower part 5, washing machine frame upper part 6, washing machine frame forming insert 7, plastic part secondary assembly ejection structure 8, ejector rod connecting slide plate 9, washing machine frame snap-fit ​​forming angled ejector 10, straight ejector 11, angled ejector rod 12, snap-fit ​​forming block 13, angled ejector rod connecting slide 14, middle straight ejector rod 15, vertical rod 16, washing machine frame hole groove forming shaft 17, rear straight ejector rod 18, washing machine frame side groove auxiliary forming block 19, injection molding main board 20, injection molding flow divider 21, and fixed frame 22, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A secondary ejection mechanism for a washing machine frame injection mold, comprising a lower mold (1) for forming the washing machine frame and an upper mold (2) for forming the washing machine frame, characterized in that, The upper mold (2) for forming the washing machine frame is provided with an injection diversion component (3). The lower mold (1) for forming the washing machine frame is provided with a washing machine frame forming insert (4). The washing machine frame forming insert (4) has a lower part (5) of the washing machine frame. The upper mold (2) for forming the washing machine frame has an upper part (6) of the washing machine frame and a washing machine frame forming plate (7). The upper part (6) of the washing machine frame and the washing machine frame forming plate (7) are respectively positioned and matched with the lower part (5) of the washing machine frame. The lower mold (1) for forming the washing machine frame is provided with a secondary assembly ejection structure (8) for plastic parts. The secondary assembly ejection structure (8) for plastic parts passes through the washing machine frame forming insert (4).

2. The secondary ejection mechanism for the injection mold of the washing machine frame according to claim 1, characterized in that, The secondary assembly ejection structure (8) of the plastic part includes an ejector rod connecting slide plate (9) located below the lower mold (1) for forming the washing machine frame. The ejector rod connecting slide plate (9) is provided with a washing machine frame snap-fit ​​forming inclined ejector (10) and a straight ejector (11). The washing machine frame snap-fit ​​forming inclined ejector (10) and the straight ejector (11) are arranged alternately.

3. The secondary ejection mechanism for the washing machine frame injection mold according to claim 2, characterized in that, The washing machine frame snap-fit ​​slanted top part (10) includes two slanted top rods (12) set on the top rod connecting slide plate (9). The top of the slanted top rod (12) is provided with a snap-fit ​​forming block (13), and the snap-fit ​​forming block (13) extends into the washing machine frame forming insert (4).

4. The secondary ejection mechanism for the washing machine frame injection mold according to claim 3, characterized in that, The top rod connecting slide plate (9) is provided with two inclined top rod connecting slides (14), and the bottom of the inclined top rod (12) slides in cooperation with the inclined top rod connecting slide (14).

5. The secondary ejection mechanism for the washing machine frame injection mold according to claim 4, characterized in that, The straight pusher (11) includes several central straight pushers (15) disposed on the pusher connecting slide plate (9). The central straight pushers (15) penetrate into the washing machine frame forming insert (4). The central straight pushers (15) and the inclined pushers (12) are arranged alternately.

6. The secondary ejection mechanism for the washing machine frame injection mold according to claim 5, characterized in that, The top rod connecting slide plate (9) is also provided with several vertical rods (16), and the top of the vertical rods (16) is provided with a washing machine frame slot forming shaft (17).

7. The secondary ejection mechanism for the injection mold of the washing machine frame according to claim 6, characterized in that, The diameter of the forming shaft (17) of the washing machine frame slot is smaller than the diameter of the vertical rod (16).

8. The secondary ejection mechanism for the injection mold of the washing machine frame according to claim 7, characterized in that, The top rod connecting slide plate (9) is also provided with several rear straight top rods (18), and the top of the rear straight top rods (18) is provided with a washing machine frame side groove auxiliary forming block (19).

9. The secondary ejection mechanism for the injection mold of the washing machine frame according to claim 1, characterized in that, The injection molding diversion component (3) includes an injection molding main board (20) disposed above the upper mold (2) for forming the washing machine frame, and an injection molding diversion plate (21) is provided below the injection molding main board (20).

10. The secondary ejection mechanism for the injection mold of the washing machine frame according to claim 9, characterized in that, A fixing frame (22) for fixing the injection molding diversion plate (21) is provided between the injection molding main board (20) and the upper mold (2) for forming the washing machine frame.

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