Die

Abstract

The mold comprises a mold body, a material cutting head assembly and an ejector pin assembly, the mold body comprises an upper mold body and a lower mold body, the upper mold body is movably installed on the lower mold body, when the upper mold body and the lower mold body are closed, a cavity can be defined between the upper mold body and the lower mold body, and the mold body can conduct injection molding on a product in the cavity; the material cutting head assembly comprises a shovel base and a sliding block, the sliding block is installed on the lower die in a sliding mode, the shovel base penetrates through the sliding block and is connected with the upper die, and the shovel base can be driven by the upper die to push the sliding block so as to drive the sliding block to slide on the lower die and shear a material head on a product located in the cavity; the ejector pin assembly is movably installed on the lower die and penetrates through the sliding block, and the ejector pin assembly can eject the stub bar cut off by the sliding block out of the cavity. The mold is simple in structure, stable in operation and easy to maintain, the problem that the material head is loaded on a product can be solved through the mold, the material head is prevented from being retained in the mold, and the yield of the product prepared through the mold is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field related to in-mold trimming of material heads, and particularly relates to a mold. Background Technique

[0002] At present, for the molds used to produce cable ties, in order to achieve mass production, the molds are usually designed with multiple cavities in one mold, so that the mold can produce 24 or 32 cable ties at the same time. However, since there are material heads connecting between the cable ties, it is necessary to remove the material heads between the cable ties. The existing conventional methods for removing material heads mainly include manually cutting off the material heads and in-mold hot cutting. Among them, manually cutting off the material heads not only consumes a lot of time, but also increases the labor cost; while in-mold hot cutting integrates the process of cutting the material heads in the mold. Specifically, when the mold is closed, the material heads are cut off, and the two ends are extruded by the ejector pins to discharge the material heads. Although this can improve the working efficiency and product quality. However, it will make the mold structure complex, and during the process of cutting the material heads, there is a risk that the material heads will fall off and get stuck in the mold, resulting in defective products. Therefore, it is particularly important to design a new method for cutting material heads. Content of the Utility Model

[0003] In view of this, it is necessary to provide a mold for solving the above technical problems.

[0004] A mold, the mold includes:

[0005] A mold body, including an upper mold and a lower mold, the upper mold is movably installed on the lower mold, when the upper mold and the lower mold are closed, a cavity can be formed between the upper mold and the lower mold, and the mold can inject and mold products in the cavity;

[0006] A material head cutting assembly, including a shovel base and a slider, the slider is slidably installed on the lower mold, the shovel base penetrates through the slider and is connected to the upper mold, and the shovel base can push the slider under the drive of the upper mold to drive the slider to slide on the lower mold and shear the material heads on the products in the cavity;

[0007] An ejector pin assembly, which is movably installed on the lower mold and penetrates through the slider, and the ejector pin assembly can eject the material heads cut by the slider out of the cavity.

[0008] It can be understood that through the above structural settings, during the mold opening process of the mold, the slider can first perform in-mold hot cutting on the product feeding head, and then use the ejector pin assembly to eject the feeding head cut by the slider, which can effectively solve the problem of the product feeding head, avoid the retention of the feeding head in the mold, and ensure the yield rate of the products prepared by the mold; at the same time, since the slider, the lifter base and the ejector pin assembly can be improved on the basis of the original mold, the mold has a simple structure, stable operation and is easy to maintain.

[0009] In one embodiment, a groove is formed on the slider, and the groove is arranged in the cavity and communicated with the cavity;

[0010] Wherein, at least part of the feeding head is injection molded in the groove.

[0011] In one embodiment, a through groove is formed on the slider, the lifter base penetrates through the through groove, and the groove diameter of the through groove is larger than the outer diameter of the part of the lifter base located in the through groove;

[0012] Wherein, a pushing convex part is arranged on the slider in the through groove, the pushing convex part is arranged on the movement path of the lifter base, and the lifter base can push the slider to slide on the lower mold through the pushing convex part.

[0013] It can be understood that through the above structural settings, the lifter base can push the slider to slide on the lower mold through the pushing convex part while moving, and meet the use requirement of the lifter base for driving the slider to slide.

[0014] In one embodiment, the pushing convex part has an arc surface, and the arc surface abuts against the lifter base.

[0015] It can be understood that by using the structural characteristics of the arc surface, the smoothness of the lifter base pushing the slider through the pushing convex part can be improved.

[0016] In one embodiment, the cutting feeding head assembly further includes a first elastic member, and the first elastic member is arranged on the sliding path of the slider and abuts against the slider, and is used for driving the slider to elastically reset.

[0017] It can be understood that by using the elastic pushing of the first elastic member on the slider, the automatic reset of the slider when sliding on the lower mold can be realized.

[0018] In one embodiment, a clearance surface is formed on the lifter base, and the clearance surface is used to avoid the pushing convex part, so that the slider can be reset under the elastic pushing of the first elastic member.

[0019] It can be understood that the shovel base uses the clearance surface to avoid the slider, which can meet the use requirement of the first elastic member to elastically reset the slider.

[0020] In one embodiment, at least a part of the first elastic member is disposed inside the slider, and is respectively in contact with the slider and the lower mold.

[0021] It can be understood that through the above structural arrangement, the slider can be used to limit the assembly of the first elastic member, so as to improve the stability of the first elastic member when elastically driving the slider.

[0022] In one embodiment, the ejector pin assembly includes an ejector pin and an insert pin. The insert pin is telescopically installed inside the slider, and the insert pin can be in contact with the slug located on the slider.

[0023] The ejector pin is correspondingly arranged with the insert pin. The ejector pin is disposed below the corresponding insert pin, and the ejector pin can drive the corresponding insert pin to push the slug located on the slider.

[0024] It can be understood that through the above structural arrangement, the insert pin can slide on the lower mold following the slider, and meet the use requirement that the ejector pin pushes the slug through the insert pin.

[0025] In one embodiment, the ejector pin assembly further includes a second elastic member. The second elastic member is correspondingly arranged with the insert pin. The second elastic member is sleeved on the corresponding insert pin and is respectively in contact with the slider and the insert pin, and is used to drive the insert pin to elastically reset.

[0026] It can be understood that by using the elastic push of the second elastic member on the insert pin, the automatic reset of the insert pin when sliding inside the slider can be realized.

[0027] In one embodiment, the number of the insert pins is configured to be multiple. The multiple insert pins cooperate with each other and are jointly used to push the slug on the slider.

[0028] It can be understood that through the above structural arrangement, it can be ensured that when the ejector pin assembly works, the slug cut off by the slider can be ejected from the slider.

[0029] Due to the application of the above technical solution, the present utility model has the following advantages compared with the prior art:

[0030] The mold claimed in the present application can, during the mold opening process, first perform in-mold thermal cutting on the feeding head of the product by the slider, and then use the ejector pin assembly to eject the material head cut by the slider, effectively solving the problem of the product's material head, avoiding the retention of the material head in the mold, and ensuring the yield rate of the products prepared by this mold. At the same time, since the slider, the lifter base and the ejector pin assembly can be improved on the basis of the original mold, the mold has a simple structure, stable operation and is easy to maintain. Brief Description of the Drawings

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application or in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0032] Figure 1 It is a cross-sectional view of the mold provided by the present application.

[0033] Figure 2 It is a partial cross-sectional view of the mold provided by the present application.

[0034] Figure 3 It is Figure 2 The enlarged view of part A in

[0035] Figure 4 It is Figure 2 The enlarged view of part B in

[0036] Figure 5 It is a partial structural schematic diagram of the mold provided by the present application.

[0037] Figure 6 It is Figure 5 The enlarged view of part C in

[0038] Reference Numerals: 100, mold; 101, cavity; 10, mold body; 11, upper mold; 12, lower mold; 20, material head cutting assembly; 21, lifter base; 211, mating surface; 212, clearance surface; 22, slider; 221, groove; 222, through groove; 223, pushing convex part; 2231, arc surface; 224, spring groove; 23, first elastic member; 30, ejector pin assembly; 31, ejector pin; 32, insert pin; 33, second elastic member; 200, product; 210, tie strap; 220, material head. Detailed Description of the Embodiments

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0040] It should be noted that when an element is referred to as being "provided on" another element, it can be directly provided on the other element or there may also be an intermediate element. When an element is considered to be "provided on" another element, it can be directly provided on the other element or there may be an intermediate element at the same time. When an element is considered to be "fixed to" another element, it can be directly fixed to the other element or there may be an intermediate element at the same time.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs. The terms used in the description of the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0042] As Figure 6 shown, the mold 100 claimed in this application is used for injection molding products 200. Here, the product 200 includes a plurality of cable ties 210, and the plurality of cable ties 210 are connected by a sprue 220, so that the mold 100 can simultaneously prepare a plurality of cable ties 210 at one time. Specifically, a row of cable ties 210 is formed on each of the left and right sides of the sprue 220.

[0043] As Figure 1 、 Figure 2As shown, the mold 100 provided by the present application includes a mold body 10, a cutting head assembly 20, and a thimble assembly 30. The mold body 10 includes an upper mold 11 and a lower mold 12. The upper mold 11 is movably installed on the lower mold 12. When the upper mold 11 and the lower mold 12 are closed, a cavity 101 can be formed between the upper mold 11 and the lower mold 12. Moreover, the mold 100 can injection-mold a product 200 in the cavity 101; the cutting head assembly 20 includes a shovel base 21 and a slider 22. The slider 22 is slidably installed on the lower mold 12. The shovel base 21 penetrates through the slider 22 and is connected to the upper mold 11. Also, the shovel base 21 can push the slider 22 under the drive of the upper mold 11 to drive the slider 22 to slide on the lower mold 12 and shear the material head 220 on the product 200 located in the cavity 101; the thimble assembly 30 is movably installed on the lower mold 12 and penetrates through the slider 22. Moreover, the thimble assembly 30 can eject the material head 220 cut by the slider 22 out of the cavity 101. Here, the stroke when the slider 22 slides on the lower mold 12 can completely cut the connection between the material head 220 and multiple tie straps 210 in the product 200.

[0044] As can be seen from the above, during the mold opening process of the mold 100 of the present application, the upper mold 11 drives the shovel base 21 to drive the slider 22 to slide on the lower mold 12. During the sliding process of the slider 22, in-mold hot cutting of the material head 220 on the product 200 can be realized, and then the thimble assembly 30 is used to eject the material head 220 cut by the slider 22. This can effectively solve the problem of the material head 220 on the product 200, avoid the retention of the material head 220 in the mold 100, and ensure the yield rate of the products prepared by the mold 100; at the same time, since the slider 22, the shovel base 21, and the thimble assembly 30 can be improved on the basis of the original mold, the mold 100 has a simple structure, stable operation, and is easy to maintain.

[0045] As Figure 5 、 Figure 6 shown, a groove 221 is formed on the slider 22. The groove 221 is arranged in the cavity 101 and communicates with the cavity 101; among them, at least part of the material head 220 is injection-molded in the groove 221. Here, the connected part of the material heads 220 in the two rows of tie straps 210 is arranged in the groove 221 of the slider 22, so that during the sliding process of the slider 22 on the lower mold 12, the cutting of the connection between the material head 220 and multiple tie straps 210 can be realized.

[0046] As Figure 2 、 Figure 3As shown, a through groove 222 is formed in the slider 22, and the shovel base 21 passes through the through groove 222. Moreover, the diameter of the through groove 222 is larger than the outer diameter of the part of the shovel base 21 located within the through groove 222. Among them, a pushing convex part 223 is arranged in the through groove 222 of the slider 22. The pushing convex part 223 is arranged on the movement path of the shovel base 21, and the shovel base 21 can push the slider 22 to slide on the lower die 12 through the pushing convex part 223. So that the shovel base 21 can push the slider 22 to slide on the lower die 12 through the pushing convex part 223 while moving, and meet the use requirement of the shovel base 21 for driving the slider 22 to slide.

[0047] Preferably, as Figure 3 shown, the pushing convex part 223 has an arc surface 2231, and the arc surface 2231 abuts against the shovel base 21. That is to say, while the shovel base 21 follows the upper die 11 to leave the lower die 12, the shovel base 21 can act on the arc surface 2231 of the pushing convex part 223 and realize driving the slider 22 to slide on the lower die 12. Here, a mating surface 211 matching the arc surface 2231 is formed on the shovel base 21. In this way, by using the structural characteristics of the arc surface 2231, the smoothness of the shovel base 21 pushing the slider 22 through the pushing convex part 223 can be improved.

[0048] As Figure 2 、 Figure 4 shown, the blanking head assembly 20 further includes a first elastic member 23. The first elastic member 23 is arranged on the sliding path of the slider 22 and abuts against the slider 22, and is used to drive the slider 22 to elastically reset, so that the automatic reset of the slider 22 when sliding on the lower die 12 can be realized. Here, the first elastic member 23 is configured as a compression spring, and the number of compression springs is two. The two compression springs are symmetrically arranged with respect to the center line of the slider 22. It can be understood that in other embodiments, the first elastic member 23 can also be configured as a rubber sleeve, or other highly elastic elastic fittings, and the number of the first elastic members 23 can also be one, three, or even more. This will not be elaborated here.

[0049] Preferably, as Figure 2 shown, at least part of the first elastic member 23 is arranged within the slider 22 and abuts against the slider 22 and the lower die 12 respectively. Here, a spring groove 224 matching the first elastic member 23 is formed on the slider 22, and the first elastic member 23 is partially inserted into the spring groove 224 and abuts against the slider 22, so that the slider 22 can limit the assembly of the first elastic member 23, and in this way, the stability of the first elastic member 23 driving the slider 22 elastically can be improved.

[0050] As Figure 2 、 Figure 3As shown, an avoidance surface 212 is provided on the shovel base 21. The avoidance surface 212 is used to avoid the pushing convex portion 223, so that the slider 22 can be reset under the elastic pushing of the first elastic member 23. When the shovel base 21 pushes the pushing convex portion 223, once the pushing convex portion 223 moves to the avoidance surface 212 of the shovel base 21, the shovel base 21 can release the driving of the pushing convex portion 223. In this way, the compressed first elastic member 23 can drive the slider 22 to slide and reset on the lower die 12, and meet the usage requirement that the first elastic member 23 drives the slider 22 to elastically reset.

[0051] As Figure 2 , Figure 4 shown, the ejector pin assembly 30 includes an ejector pin 31 and an insert pin 32. The insert pin 32 is telescopically installed in the slider 22, and the insert pin 32 can abut against the stock head 220 located on the slider 22. The ejector pin 31 is arranged corresponding to the insert pin 32. The ejector pin 31 is arranged below the corresponding insert pin 32, and the ejector pin 31 can drive the corresponding insert pin 32 to push the stock head 220 located on the slider 22. The insert pin 32 can slide on the lower die 12 following the slider 22. When the ejector pin 31 is directly below the corresponding insert pin 32, the ejector pin 31 can push the stock head 220 on the slider 22 through the corresponding insert pin 32. In this way, the usage requirement that the ejector pin assembly 30 ejects the stock head 220 on the slider 22 during operation can be met. That is, the setting of the ejector pin assembly 30 does not affect the usage requirement of the slider 22 slidingly installed on the lower die 12.

[0052] Preferably, as Figure 2 , Figure 4 shown, the number of insert pins 32 is configured to be multiple. The multiple insert pins 32 cooperate with each other and are jointly used to push the stock head 220 on the slider 22, so as to ensure that the ejector pin assembly 30 can eject the stock head 220 cut by the slider 22 during operation. Here, the parts of the stock head 220 between the two rows of tie straps 210 are respectively provided with left and right insert pins 32 and ejector pins 31 corresponding to them.

[0053] As Figure 4 shown, the ejector pin assembly 30 further includes a second elastic member 33. The second elastic member 33 is arranged corresponding to the insert pin 32. The second elastic member 33 is sleeved on the corresponding insert pin 32 and abuts against the slider 22 and the insert pin 32 respectively, and is used to drive the insert pin 32 to elastically reset, so that the ejector pin assembly 30 can use the second elastic member 33 to automatically reset the insert pin 32 when it slides in the slider 22. Here, the second elastic member 33 is configured as a spring, a rubber sleeve, or other highly elastic elastic fittings.

[0054] In summary, when manufacturing the product 200 with the mold 100 of the present application, during the process of opening the upper mold 11 of the mold 100 from the lower mold 12, the lifting base 21 is driven to move relative to the slider 22. By using the pushing of the lifting base 21 against the pushing convex part 223 on the slider 22, the driving of the slider 22 to slide on the lower mold 12 can be realized, and the hot in-mold cutting of the feeding head 220 on the product 200 can be achieved. After that, the ejector pin assembly 30 can be used to eject the feeding head 220 cut by the slider 22. In this way, the problem of the feeding head 220 of the product 200 can be effectively solved, the retention of the feeding head 220 in the mold 100 can be avoided, and the yield rate of the product 200 prepared by the mold 100 can be ensured. Since the slider 22, the lifting base 21 and the ejector pin assembly 30 can be improved on the basis of the original mold 100, and the movement of the upper mold 11 during the mold opening of the mold 100 is used to complete the cutting of the feeding head 220 of the product 200, the mold 100 has a simple structure, stable operation and is easy to maintain.

[0055] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0056] Those of ordinary skill in the art of the present technology should recognize that the above embodiments are only used to illustrate the present invention, rather than to limit the present invention. As long as it is within the scope of the substantial spirit of the present invention, the appropriate changes and variations made to the above embodiments fall within the scope of protection required by the present invention.

Claims

1. A mold, characterized in that, The mold (100) includes: A mold body (10), including an upper mold (11) and a lower mold (12), the upper mold (11) is movably installed on the lower mold (12), when the upper mold (11) and the lower mold (12) are closed, a cavity (101) can be formed between the upper mold (11) and the lower mold (12), and the mold (100) can inject and mold a product (200) within the cavity (101); A cutting head assembly (20), including a shovel base (21) and a slider (22), the slider (22) is slidably installed on the lower mold (12), the shovel base (21) penetrates through the slider (22) and is connected to the upper mold (11), and the shovel base (21) can push the slider (22) under the drive of the upper mold (11) to drive the slider (22) to slide on the lower mold (12) and shear the sprue (220) on the product (200) located within the cavity (101); A ejector pin assembly (30), movably installed on the lower mold (12) and penetrating through the slider (22), and the ejector pin assembly (30) can eject the sprue (220) cut by the slider (22) out of the cavity (101).

2. The mold according to claim 1, characterized in that, A groove (221) is formed on the slider (22), the groove (221) is arranged within the cavity (101) and communicates with the cavity (101); Wherein, at least a part of the sprue (220) is injection molded within the groove (221).

3. The mold according to claim 2, wherein A through slot (222) is formed on the slider (22), the shovel base (21) penetrates through the through slot (222), and the diameter of the through slot (222) is larger than the outer diameter of the part of the shovel base (21) located within the through slot (222); Wherein, a pushing convex portion (223) is arranged on the slider (22) within the through slot (222), the pushing convex portion (223) is arranged on the movement path of the shovel base (21), and the shovel base (21) can push the slider (22) to slide on the lower mold (12) through the pushing convex portion (223).

4. The mold according to claim 3, characterized in that, The pushing convex portion (223) has an arc surface (2231), and the arc surface (2231) abuts against the shovel base (21).

5. The mold according to claim 3, characterized in that, The cutting head assembly (20) further includes a first elastic member (23), the first elastic member (23) is arranged on the sliding path of the slider (22) and abuts against the slider (22) for driving the slider (22) to elastically reset.

6. The mold according to claim 5, characterized in that, An avoidance surface (212) is formed on the shovel base (21), the avoidance surface (212) is used to avoid the pushing convex portion (223) so that the slider (22) can be reset under the elastic pushing of the first elastic member (23).

7. The mold according to claim 5, characterized in that, At least a part of the first elastic member (23) is arranged within the slider (22) and abuts against the slider (22) and the lower mold (12) respectively.

8. The mold according to claim 2, characterized in that, The thimble assembly (30) includes a thimble (31) and a dowel pin (32). The dowel pin (32) is telescopically installed in the slider (22), and the dowel pin (32) can abut against the slug (220) located on the slider (22). The thimble (31) is arranged corresponding to the dowel pin (32). The thimble (31) is disposed below the corresponding dowel pin (32), and the thimble (31) can drive the corresponding dowel pin (32) to push the slug (220) located on the slider (22).

9. The mold according to claim 8, characterized in that, The thimble assembly (30) further includes a second elastic member (33). The second elastic member (33) is arranged corresponding to the dowel pin (32). The second elastic member (33) is sleeved on the corresponding dowel pin (32) and abuts against the slider (22) and the dowel pin (32) respectively, for driving the dowel pin (32) to reset elastically.

10. The mold according to claim 8, characterized in that, The number of the dowel pins (32) is configured to be multiple. The multiple dowel pins (32) cooperate with each other and are jointly used to push the slug (220) on the slider (22).

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