Compression molding mold of lock washer

Abstract

The compression mold comprises a lower mold, a middle mold, an upper mold and a mold core, a through hole I is formed in the lower mold, a filling cavity is formed in the middle mold, the upper mold extends into the filling cavity, a melting cavity is formed between the middle mold and the lower mold, and the compression mold further comprises a partition plate arranged on the step surface of the filling cavity; wherein a plurality of through holes II communicated with the melt cavity are formed in the partition plate, a cavity is formed in the mold core, and a through hole III enabling the cavity to be communicated with the melt cavity is formed in the lower mold. The compression molding die is adopted to manufacture the lock washer, production of different parts can be achieved only by changing the cavity of the die core, and the compression molding die can be suitable for production of small-batch parts, so that production efficiency is greatly improved, material waste and rejection rate are reduced, production cost is reduced, durability of the die is enhanced, and production cost is reduced. And meanwhile, through holes II in the partition plates are further pressurized, the material melting effect is improved, and the product quality is improved.

Description

Technical Field

[0001] The utility model belongs to the field of compression molding dies, and particularly relates to a compression molding die for a stop washer. Background Art

[0002] In the prior art, the manufacturing of stop washers mainly relies on the injection molding process, which shows efficient and cost-effective advantages in large-scale and mass production. However, with the increasing diversification and customization trends in the market demand, the production requirements for small batches and multiple varieties are increasing day by day. The traditional injection molding process exposes some objective disadvantages when facing these changes:

[0003] 1. High equipment dependence: Injection molding requires the use of special injection molding machines, which limits the flexibility of the production site and the reduction of production costs. It is particularly difficult for manufacturers who do not have or are not willing to invest in purchasing injection molding equipment to manufacture stop washers;

[0004] 2. High mold cost: The design structure of injection molds is complex and requires precise processing and manufacturing, resulting in high mold costs. Especially in the case of small batch production, the high cost of the mold cannot be amortized by large-scale production, which significantly increases the manufacturing cost of a single product.

[0005] 3. Low mold utilization rate: When the production batch is small, the utilization rate of the mold will drop significantly because the replacement, debugging, and maintenance of the mold all require time and cost. This not only affects production efficiency but also increases the uncertainty in the production process.

[0006] 4. Lack of flexibility: The injection molding process is relatively slow in adapting to product design changes or production adjustments and requires re-designing or modifying the mold, which increases the production cycle and cost.

[0007] For example, the polyurethane washer injection mold disclosed in the patent application number CN202321976037.9. When producing washers, this device needs to open a special mold for injection molding, which can achieve large-scale and mass production. However, when facing small batch production of different specifications, the mold development cost for injection molding is high, the mold utilization rate is low, and the mold needs to be re-designed or modified, which increases the production cycle and cost. Content of the Utility Model

[0008] An object of the utility model is to solve at least the above problems and / or defects and provide at least the advantages described hereinafter.

[0009] To achieve these objects and other advantages according to the present utility model, a compression molding die for a stop washer is provided, including: a lower die, a middle die, an upper die, and a die core. A plurality of through holes Ⅰ for installing the die core are provided on the lower die. A positioning component is provided on the lower die and the middle die. A stepped filler cavity is provided on the middle die. One protruding end of the upper die extends into the filler cavity. A melt cavity communicating with the filler cavity is provided between the middle die and the lower die. Further included is a partition plate provided on the stepped surface of the filler cavity.

[0010] Wherein, a plurality of through holes Ⅱ communicating with the melt cavity are provided on the partition plate. A cavity of the die is formed between the upper end surface of the die core and the side wall of the lower die. A through hole Ⅲ for communicating the cavity with the melt cavity is provided on the lower die.

[0011] Preferably, the positioning component includes: a plurality of positioning pins, and positioning holes for installing each positioning pin are provided on the lower die and the middle die.

[0012] Preferably, paired die unloading holes Ⅰ are provided on both sides of the lower die, and paired die unloading holes Ⅱ are provided on both sides of the middle die;

[0013] Wherein, the die unloading holes Ⅰ and the die unloading holes Ⅱ are staggered in spatial position.

[0014] Preferably, further included is a die unloading tooling Ⅰ cooperating with the die unloading holes Ⅰ and the die unloading holes Ⅱ. The die unloading tooling Ⅰ includes: a bottom plate Ⅰ, and a plurality of ejector rods Ⅰ provided on the bottom plate Ⅰ;

[0015] Wherein, the distance between each ejector rod Ⅰ matches the distance between each die unloading hole, and the size of the ejector rod Ⅰ matches the size of the die unloading hole.

[0016] Preferably, further included is a die unloading tooling Ⅱ cooperating with the lower die. The die unloading tooling Ⅱ includes: a bottom plate Ⅱ, and a plurality of ejector rods Ⅱ provided on the bottom plate Ⅱ;

[0017] A ring, one end surface of the ring abuts against the upper surface of the lower die;

[0018] Wherein, the distance between each ejector rod Ⅱ matches the distance between each through hole Ⅰ, the size of the ejector rod Ⅱ matches the size of the through hole Ⅱ, and each ejector rod Ⅱ abuts against the bottom of the die core; the inner area of the ring is larger than the area where the die cores are distributed on the lower die.

[0019] The utility model has at least the following beneficial effects: By using a compression mold to manufacture the stop washer, different parts can be produced only by changing the cavity of the mold core, which is applicable to the production of small batches of parts, thus greatly improving the production efficiency. By reducing material waste and the rejection rate, the production cost is reduced, and the durability of the mold is enhanced. At the same time, the through hole II on the partition plate is further pressurized to improve the melting effect of the material and the quality of the product.

[0020] Other advantages, objectives and features of the utility model will be partially reflected by the following description and partially understood by those skilled in the art through the research and practice of the utility model. Brief Description of the Drawings

[0021] Figure 1 Side sectional view of the compression mold of the stop washer at the positioning pin hole;

[0022] Figure 2 Top view of the compression mold of the stop washer;

[0023] Figure 3 Side sectional view of the compression mold of the stop washer before compression;

[0024] Figure 4 Overall structural schematic diagram of the mold unloading tooling I;

[0025] Figure 5 Side schematic diagram of the mold unloading tooling I;

[0026] Figure 6 Top view of the bottom plate II and the ejector rod II of the mold unloading tooling II;

[0027] Figure 7 Side sectional view of the bottom plate II and the ejector rod II of the mold unloading tooling II;

[0028] Figure 8 Schematic diagram of the circular ring structure of the mold unloading tooling II;

[0029] Figure 9 Schematic diagram of the mechanism of the stop washer.

[0030] Markings in the figure: 1. Lower mold, 2. Middle mold, 3. Upper mold, 4. Mold core, 5. Cavity, 6. Filler cavity, 7. Melt cavity, 8. Partition plate, 9. Positioning pin, 10. Positioning hole, 11. Mold unloading hole I, 12. Mold unloading hole II, 13. Bottom plate I, 14. Ejector rod I, 15. Bottom plate II, 16. Ejector rod II, 17. Circular ring, 18. Through hole I, 19. Through hole II, 20. Through hole III. Detailed Description of the Preferred Embodiment

[0031] The following further elaborates on the present utility model in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the text of the specification.

[0032] It should be understood that terms such as "having", "comprising", and "including" used herein do not exclude the presence or addition of one or more other elements or their combinations.

[0033] It should be noted that in the description of the present utility model, the orientation or positional relationship indicated by the terms is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present utility model, unless otherwise clearly specified and defined, terms such as "installed", "provided with", "sheathed / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0035] In addition, in the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over", and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath", and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0036] As Figure 1 shown, a compression molding die for a stop washer includes: a lower die 1, a middle die 2, an upper die 3, and a die core 4. A plurality of through holes Ⅰ18 for installing the die core 4 are provided on the lower die 1. A positioning component is provided on the lower die 1 and the middle die 2. A stepped filler cavity 6 is provided on the middle die 2. One protruding end of the upper die 3 extends into the filler cavity 6. A melt cavity 7 communicating with the filler cavity 6 is provided between the middle die 2 and the lower die 1. It further includes: a partition plate 8 provided on the stepped surface of the filler cavity 6;

[0037] Among them, a plurality of through holes II 19 communicating with the melt cavity 7 are formed in the partition plate 8. The upper end surface of the die core 4 and the side wall of the lower die 1 form a cavity 5 of the mold. A through hole III 20 for communicating the cavity 5 with the melt cavity 7 is formed in the lower die 1.

[0038] Working principle:

[0039] In use, first, the die core 4 is installed in the through hole I 18 of the lower die 1. Secondly, the lower die 1 and the middle die 2 are connected together by a positioning component and the rotation of the two in space is limited. The material is filled into the stuffing cavity 6 between the middle die and the partition plate 8. At the same time, one end of the protruding upper die is extended into the stuffing cavity 6 to pressurize the material. Because the upper die 3 has a certain temperature, under the action of pressure and temperature, the material is pressed into the through hole II 19 in the partition plate 8. Through the diameter change of the through hole II 19 in the partition plate 8, the material is further pressurized and melted, so that the material has better fluidity. At this time, the material enters the melt cavity, and then enters the cavity 5 of the mold through the through hole III 20 respectively. After the material is cooled, the required stop washer is finally manufactured.

[0040] In the above technical solution, the positioning component includes: a plurality of positioning pins 9. Positioning holes 10 for installing the positioning pins 9 are formed in the lower die 1 and the middle die 2. By adopting this technical solution, when it is necessary to fix the lower die 1 and the middle die 2, the operator only needs to insert two positioning pins 9 into the corresponding positioning holes 10 to realize the rapid positioning and fixing of the lower die 1 and the middle die 2 without complicated debugging work. The production efficiency is improved and the operation difficulty is reduced.

[0041] In the above technical solution, paired demolding holes I 11 are formed on both sides of the lower die 1, and paired demolding holes II 12 are formed on both sides of the middle die 2;

[0042] Among them, the demolding holes I 11 and the demolding holes II 12 are staggered in spatial position. By adopting this technical solution, it is convenient to subsequently disassemble the lower die and the middle die through the demolding holes I 11 and the demolding holes II 12 by a demolding tooling.

[0043] In the above technical solution, it further includes: a demolding tooling I that cooperates with the demolding hole I 11 and the demolding hole II 12. The demolding tooling I includes: a bottom plate I 13, and a plurality of ejector rods I 14 arranged on the bottom plate I 13; wherein, the distance between the ejector rods I 14 matches the distance between the demolding holes, and the size of the ejector rods I 14 matches the size of the demolding holes. With this technical solution, two demolding tooling I are used simultaneously. The positions and sizes of the ejector rods I 14 of one demolding tooling I match those of the demolding hole I 11. By rotating the other demolding tooling I 90 degrees in space, the positions and sizes of the ejector rods I 14 of the demolding tooling I can be made to match those of the demolding hole II 12. And one group of ejector rods I 14 pass through the demolding hole I 11 opened on both sides of the lower mold 1 and abut against the lower surface of the middle mold 2, and the other group of ejector rods I 14 pass through the demolding hole II 12 opened on both sides of the middle mold 2 and abut against the upper surface of the lower mold 1. Then, a force is applied to one of the bottom plates I 13 by a press, and the force is applied to the lower surface of the middle mold 2 and the upper surface of the lower mold 1 respectively through the two groups of ejector rods I 14, driving the corresponding molds to move in opposite directions, thereby separating the lower mold and the middle mold.

[0044] In the above technical solution, it further includes: a demolding tooling II that cooperates with the lower mold 1. The demolding tooling II includes: a bottom plate II 15, and a plurality of ejector rods II 16 arranged on the bottom plate II 15;

[0045] A ring 17, one end face of the ring 17 abuts against the upper surface of the lower mold 1;

[0046] Wherein, the distance between the ejector rods II 16 matches the distance between the through holes I 18, the size of the ejector rods II 16 matches the size of the through hole II 19, and each ejector rod II 16 abuts against the bottom of the mold core 4; the internal area of the ring 17 is larger than the area where the mold core 4 is distributed on the lower mold 1. With this technical solution, the positions of the plurality of ejector rods II 16 on the bottom plate II 15 are made to correspond to the positions of the through holes I 18 on the lower mold 1 one by one. At the same time, one end face of the ring 17 is in contact with the upper surface of the lower mold 1, and the internal area of the ring 17 is larger than the area where the mold core 4 is distributed on the lower mold 1. In this way, the lower mold 1 is lifted by a certain height through the ring 17, and there is a certain height difference between the mold core 4 and the bottom plate surface of the press. Then, a force is applied to the bottom plate II 15 by the press, and the force is applied to the bottom of the mold core 4 through the ejector rods II 16, and the mold core 4 is then pushed out of the lower mold 1. The staff can then take out the cooled and formed stop washer from the cavity 5 at the upper end of the mold core 4.

[0047] Although the embodiments of the present utility model have been disclosed as above, it is not limited to the applications listed in the specification and embodiments. It can be fully applied to various fields suitable for the present utility model. For those familiar with the field, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present utility model is not limited to the specific details and the illustrated examples here.

Claims

1. A compression molding die for a stop washer, comprising: Lower die, middle die, upper die, and die core. A plurality of through holes Ⅰ for installing the die core are provided on the lower die. It is characterized in that a positioning component is provided on the lower die and the middle die. A stepped filler cavity is provided on the middle die. One end of the protruding upper die extends into the filler cavity. A melt cavity communicating with the filler cavity is provided between the middle die and the lower die. Further included is a partition plate provided on the stepped surface of the filler cavity. Among them, a plurality of through holes Ⅱ communicating with the melt cavity are provided on the partition plate. The upper end surface of the die core and the side wall of the lower die form the cavity of the mold. A through hole Ⅲ for communicating the cavity with the melt cavity is provided on the lower die.

2. The compression molding die for the stop washer according to claim 1, characterized in that, The positioning component includes: a plurality of positioning pins, and positioning holes for installing each positioning pin are provided on the lower die and the middle die.

3. The compression molding die for the stop washer according to claim 1, characterized in that, Paired mold unloading holes Ⅰ are provided on both sides of the lower die, and paired mold unloading holes Ⅱ are provided on both sides of the middle die. Among them, the mold unloading holes Ⅰ and the mold unloading holes Ⅱ are staggered in spatial position.

4. The compression molding die for the stop washer according to claim 3, characterized in that, Further included is: A mold unloading tooling Ⅰ that cooperates with the mold unloading holes Ⅰ and the mold unloading holes Ⅱ. The mold unloading tooling Ⅰ includes: a bottom plate Ⅰ, and a plurality of ejector rods Ⅰ provided on the bottom plate Ⅰ. Among them, the spacing between the ejector rods Ⅰ matches the spacing between the mold unloading holes, and the size of the ejector rods Ⅰ matches the size of the mold unloading holes.

5. The compression molding die for the stop washer according to claim 1, characterized in that, Further included is: A mold unloading tooling Ⅱ that cooperates with the lower die. The mold unloading tooling Ⅱ includes: a bottom plate Ⅱ, and a plurality of ejector rods Ⅱ provided on the bottom plate Ⅱ. A ring, and one end surface of the ring abuts against the upper surface of the lower die. Among them, the spacing between the ejector rods Ⅱ matches the spacing between the through holes Ⅰ, the size of the ejector rods Ⅱ matches the size of the through holes Ⅱ, and each ejector rod Ⅱ abuts against the bottom of the die core; the inner area of the ring is larger than the area where the die cores are distributed on the lower die.

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