A mold for forming a seal ring for a washing machine

Abstract

The utility model discloses a mould of sealing washer for forming washing machine, and the utility model relates to the technical field of forming sealing washer for washing machine, it includes lower mould, middle plate and upper mould, and the lower mould includes the base and lower boss that are successively fixed in one body from below to above, and the groove bottom of blind groove is fixed with the cylindrical platform that extends in the outside of blind groove, and the annular cavity C is formed between the outer wall of cylindrical platform and the inner wall of blind groove, the upper mould includes the cover plate, and the bottom surface of cover plate is fixed with upper boss, and the third sink of middle plate is matched with upper boss, and the bottom surface of upper boss is provided with the annular groove, and the mould core is fixed along the circumferential direction in the groove bottom of annular groove, and the annular cavity D is formed between the outer surface of mould core and the inboard wall of annular groove, and the top surface of cover plate is provided with the glue injection hole, the utility model has the beneficial effects that can form sealing washer one time, and the sealing washer forming efficiency is greatly improved.

Description

Technical Field

[0001] This utility model relates to the technical field of molding sealing rings for washing machines, and in particular to a mold for molding sealing rings for washing machines. Background Technology

[0002] The structure of the sealing ring for washing machines produced in a certain workshop is as follows: Figures 1-2 As shown, the sealing ring includes a cylindrical body 1. An annular portion A2 and an annular portion B3, integrally formed therewith, are fixed on the cylindrical surface of the cylindrical body 1. The annular portion B3 is located directly above the annular portion A2. An outwardly turned portion 4 is fixed to the inner side of the annular portion B3, and an inwardly turned portion 5 is fixed to the outer side of the annular portion B3. Both the inwardly turned portion 5 and the outwardly turned portion 4 are integrally formed with the annular portion B3. This sealing ring is made of rubber and is installed between the washing machine drum and the inner wall of the washing machine casing, serving to prevent water from entering.

[0003] The method for molding this type of sealing ring in the workshop is as follows:

[0004] S1. Workers use the first molding die to form a semi-finished sealing ring. The structure of the semi-finished sealing ring is as follows: Figure 3 As shown, the semi-finished sealing ring includes a cylindrical body 1, and an annular portion A2 and an annular portion B3 integrally formed therewith are fixed on the cylindrical surface of the cylindrical body 1.

[0005] S2. The worker removes the semi-finished sealing ring from the cavity of the first molding mold. After removal, the worker places the semi-finished sealing ring into the cavity of the second molding mold, and then injects liquid rubber into the cavity of the second molding mold. After standing for a period of time, the outward-facing part 4 and the inward-facing part 5 are formed on the annular part B3 of the semi-finished sealing ring, thus forming the... Figures 1-2 The sealing ring shown;

[0006] S3. The worker removes the formed sealing ring from the cavity of the second molding mold to obtain a sealing ring;

[0007] S4. The worker repeats steps S1 to S3 multiple times to obtain multiple required sealing rings.

[0008] However, while the methods used in the workshop can produce the required sealing rings, they still have the following technical shortcomings:

[0009] In step S1, a semi-finished sealing ring needs to be formed in the first molding mold. In step S2, the outward-facing part 4 and the inward-facing part 5 need to be formed on the basis of the semi-finished sealing ring using the second molding mold, so as to obtain the required finished sealing ring. In other words, a total of two separate processes are required to form the required finished sealing ring, which undoubtedly increases the forming time of the sealing ring and reduces the forming efficiency of the sealing ring.

[0010] Therefore, there is an urgent need for a mold that can form the sealing ring in one go and greatly improve the forming efficiency of the sealing ring. Utility Model Content

[0011] The purpose of this invention is to overcome the shortcomings of the prior art and provide a mold for molding sealing rings for washing machines that can mold sealing rings in one go and greatly improve the molding efficiency of sealing rings.

[0012] The purpose of this utility model is achieved through the following technical solution: a mold for forming a sealing ring for a washing machine, which includes a lower mold, an intermediate plate and an upper mold. The lower mold includes a base and a lower boss that are sequentially fixed together from bottom to top. A blind groove is provided on the top surface of the lower boss. A cylindrical platform extending outside the blind groove is fixed at the bottom of the blind groove. An annular cavity C is formed between the outer wall of the cylindrical platform and the inner wall of the blind groove.

[0013] The bottom surface of the intermediate plate is provided with a first sink groove and a second sink groove that are interconnected along its axial direction. The first sink groove cooperates with the lower boss. The top surface of the intermediate plate is provided with a third sink groove. The bottom of the third sink groove is provided with a central hole that is connected to the second sink groove.

[0014] The upper mold includes a cover plate, and an upper boss is fixed on the bottom surface of the cover plate. The upper boss cooperates with the third recess of the intermediate plate. An annular groove is formed on the bottom surface of the upper boss. A mold core is fixed at the bottom of the annular groove and along its circumference. An annular cavity D is formed between the outer surface of the mold core and the inner wall of the annular groove. An injection hole is formed on the top surface of the cover plate and is connected to the annular cavity D.

[0015] The bottom surface of the cylindrical platform is provided with multiple threaded holes, and the base is provided with multiple stepped holes corresponding to the threaded holes. The locking screw passes through the stepped holes and is threadedly connected to the threaded holes to fix the cylindrical platform on the base.

[0016] The diameter of the first settling tank is greater than the diameter of the third settling tank, and the diameter of the third settling tank is greater than the diameter of the second settling tank.

[0017] The outer diameter of the base is equal to the outer diameter of the cover plate, and the outer diameter of the intermediate plate is equal to the outer diameter of the cover plate.

[0018] The top surface of the cover plate has four injection holes, all of which are connected to the annular cavity D of the upper mold.

[0019] This invention has the following advantages: it can form a sealing ring in one step, greatly improving the forming efficiency of the sealing ring. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a sealing ring for a washing machine;

[0021] Figure 2 for Figure 1 Main section diagram;

[0022] Figure 3 This is a schematic diagram of the structure of the semi-finished sealing ring.

[0023] Figure 4 This is a schematic diagram of the lower mold of this utility model;

[0024] Figure 5 for Figure 4 Main section diagram;

[0025] Figure 6 This is a schematic diagram of the intermediate plate structure;

[0026] Figure 7 for Figure 6 M-direction schematic diagram;

[0027] Figure 8 for Figure 6 Main section diagram;

[0028] Figure 9 This is a schematic diagram of the upper mold structure;

[0029] Figure 10 for Figure 9 A schematic diagram of the N-direction;

[0030] Figure 11 for Figure 9 Main section diagram;

[0031] Figure 12 This is a schematic diagram of the mold core structure;

[0032] Figure 13 for Figure 12 Main section diagram;

[0033] Figure 14 This is a schematic diagram showing the first recess of the middle plate being snapped onto the lower boss of the base from top to bottom.

[0034] Figure 15 This is a schematic diagram showing the upper boss of the cover plate being inserted from top to bottom into the third groove of the middle plate;

[0035] In the picture:

[0036] 1-Cylinder body, 2-Annular part A, 3-Annular part B, 4-Outwardly turned part, 5-Inwardly turned part; 6-Intermediate plate, 7-Base, 8-Lower boss, 9-Cylindrical platform, 10-Annular cavity C;

[0037] 11-First settling tank, 12-Second settling tank, 13-Third settling tank, 14-Center hole;

[0038] 15-Cover plate, 16-Upper boss, 17-Annular groove, 18-Mold core, 19-Annular cavity D, 20-Injection hole, 21-Threaded hole, 22-Locking screw, 23-Annular cavity E. Detailed Implementation

[0039] The present invention will be further described below with reference to the accompanying drawings. The scope of protection of the present invention is not limited to the following description:

[0040] like Figures 4 to 13 As shown, a mold for forming a sealing ring for a washing machine includes a lower mold, an intermediate plate 6 and an upper mold. The lower mold includes a base 7 and a lower boss 8 that are sequentially fixed together from bottom to top. A blind groove is formed on the top surface of the lower boss 8. A cylindrical platform 9 extending outside the blind groove is fixed at the bottom of the blind groove. An annular cavity C10 is formed between the outer wall of the cylindrical platform 9 and the inner wall of the blind groove.

[0041] The bottom surface of the intermediate plate 6 is provided with a first recessed groove 11 and a second recessed groove 12 that are interconnected along its axial direction. The first recessed groove 11 cooperates with the lower boss 8. The top surface of the intermediate plate 6 is provided with a third recessed groove 13. The bottom of the third recessed groove 13 is provided with a central hole 14 that is connected to the second recessed groove 12.

[0042] The upper mold includes a cover plate 15. An upper boss 16 is fixed on the bottom surface of the cover plate 15. The upper boss 16 cooperates with the third recess 13 of the intermediate plate 6. An annular groove 17 is formed on the bottom surface of the upper boss 16. A mold core 18 is fixed at the bottom of the annular groove 17 and along its circumference. An annular cavity D19 is formed between the outer surface of the mold core 18 and the inner sidewall of the annular groove 17. An injection hole 20 is formed on the top surface of the cover plate 15. The injection hole 20 is connected to the annular cavity D19. Four injection holes 20 are formed on the top surface of the cover plate 15. All four injection holes 20 are connected to the annular cavity D19 of the upper mold.

[0043] The cylindrical platform 9 has multiple threaded holes 21 on its bottom surface, and the base 7 has multiple stepped holes corresponding to the threaded holes 21. The locking screw 22 passes through the stepped holes and is threadedly connected to the threaded holes 21 to fix the cylindrical platform 9 on the base 7.

[0044] The diameter of the first sink 11 is larger than the diameter of the third sink 13, and the diameter of the third sink 13 is larger than the diameter of the second sink 12. The outer diameter of the base 7 is equal to the outer diameter of the cover plate 15, and the outer diameter of the intermediate plate 6 is equal to the outer diameter of the cover plate 15.

[0045] The method by which workers use this mold to shape the sealing ring for washing machines is as follows:

[0046] S1. The worker places the base 7 of the lower mold flat on the table of the machine.

[0047] S2. The worker places the first recess 11 of the intermediate plate 6 onto the lower boss 8 of the base 7 from top to bottom, as follows: Figure 14 As shown, at this time, an annular cavity E23 is formed between the inner wall of the second annular groove 17 of the intermediate plate 6, the outer surface of the cylindrical platform 9 and the top surface of the lower boss 8, and the formed annular cavity E23 connects the central hole 14 with the annular cavity C10.

[0048] S3. The worker inserts the upper boss 16 of the upper mold cover plate 15 from top to bottom into the third recess 13 of the intermediate plate 6, such as... Figure 15 As shown, at this time, the annular cavity D19 of the upper mold is connected to the central hole 14;

[0049] S4. The worker uses an injection molding machine to inject a certain amount of liquid rubber into the annular cavity D19 through the injection hole 20. The liquid rubber flows into the annular cavity D19 through the injection hole 20. Under gravity, the liquid rubber then flows into the annular cavities E23 and C10 through the central hole 14. After the injection is completed, the liquid rubber injected into the annular cavity C10 forms the cylinder 1 of the sealing ring. At the same time, the liquid rubber injected into the annular cavity E23 forms the annular part A2 of the sealing ring. Simultaneously, the liquid rubber injected into the annular cavity D19 forms the annular part B3, the inwardly turned part 5, and the outwardly turned part 4 of the sealing ring, thus finally obtaining the desired sealing ring. The structure of the obtained sealing ring is as follows. Figures 1-2 As shown;

[0050] As can be seen from step S4, the worker only needs to inject a certain amount of liquid rubber into the injection hole 20. After injection and cooling for a period of time, the required sealing ring can be finally formed. Therefore, compared to the molding method in the workshop, this mold eliminates the need for workers to first use a first molding mold to form a semi-finished sealing ring, and then use a second molding mold to form the inward-facing part 5 and the outward-facing part 4 based on the semi-finished sealing ring. Instead, the required sealing ring can be formed with a single injection of liquid rubber, without any intermediate transfers. This shortens the molding time of the sealing ring and greatly improves its molding efficiency.

[0051] S5. Removal of the sealing ring: The worker first removes the upper mold and the middle plate 6; then the worker separates the upper mold and the middle plate 6, and after separation, the worker removes the sealing ring, thus obtaining the first sealing ring for the washing machine.

[0052] S6. The worker repeats steps S1 to S5 multiple times to obtain multiple required sealing rings.

[0053] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A mold for forming a sealing ring for a washing machine, characterized in that: It includes a lower mold, an intermediate plate (6) and an upper mold. The lower mold includes a base (7) and a lower boss (8) that are fixed together from bottom to top. A blind groove is provided on the top surface of the lower boss (8). A cylindrical platform (9) extending outside the blind groove is fixed at the bottom of the blind groove. An annular cavity C (10) is formed between the outer wall of the cylindrical platform (9) and the inner wall of the blind groove. The bottom surface of the intermediate plate (6) is provided with a first sinker (11) and a second sinker (12) that are interconnected along its axial direction. The first sinker (11) is engaged with the lower boss (8). The top surface of the intermediate plate (6) is provided with a third sinker (13). The bottom of the third sinker (13) is provided with a central hole (14) that is connected to the second sinker (12). The upper mold includes a cover plate (15), and an upper boss (16) is fixed on the bottom surface of the cover plate (15). The upper boss (16) cooperates with the third recess (13) of the intermediate plate (6). An annular groove (17) is opened on the bottom surface of the upper boss (16). A mold core (18) is fixed at the bottom of the annular groove (17) and along its circumference. An annular cavity D (19) is formed between the outer surface of the mold core (18) and the inner sidewall of the annular groove (17). An injection hole (20) is opened on the top surface of the cover plate (15). The injection hole (20) is connected to the annular cavity D (19).

2. The mold for forming a sealing ring for a washing machine according to claim 1, characterized in that: The cylindrical platform (9) has multiple threaded holes (21) on its bottom surface. The base (7) has multiple stepped holes that correspond to the threaded holes (21). The locking screw (22) passes through the stepped holes and is threadedly connected to the threaded holes (21) to fix the cylindrical platform (9) on the base (7).

3. The mold for forming a sealing ring for a washing machine according to claim 1, characterized in that: The diameter of the first settling trough (11) is greater than the diameter of the third settling trough (13), and the diameter of the third settling trough (13) is greater than the diameter of the second settling trough (12).

4. The mold for forming a sealing ring for a washing machine according to claim 1, characterized in that: The outer diameter of the base (7) is equal to the outer diameter of the cover plate (15), and the outer diameter of the intermediate plate (6) is equal to the outer diameter of the cover plate (15).

5. The mold for forming a sealing ring for a washing machine according to claim 1, characterized in that: The top surface of the cover plate (15) is provided with four injection holes (20), and the four injection holes (20) are all connected to the annular cavity D (19) of the upper mold.

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