A mold for molding a product having an internal undercut

Abstract

The utility model provides a mould to the product containing internal reverse buckle is formed, including upper die group and lower die group, still include: first roof, second roof and third roof, set up in lower die group in proper order, top stick is connected with second roof after passing through lower die group, a plurality of first thimble and a plurality of second thimble are arranged on first roof and second roof respectively, linkage mechanism, set up on first roof and second roof, open mould stage, make first roof and second roof act simultaneously through linkage mechanism, when first roof contacts with a plurality of limit body, linkage mechanism separates, and first roof is in stationary state, and second roof continues to act under the impetus of top stick, the mould to the product containing internal reverse buckle is formed that the utility model provides completes product stripping operation through twice ejection, need not to take out the product manually, and simultaneously avoid the problem of the appearance of the operator hand or arm etc. to scratch to occur when manual operation.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a mold for molding products containing internal undercuts. Background Technology

[0002] Plastic products are a general term for products made primarily from plastic. This includes all products manufactured using plastic as the raw material, such as injection molded and thermoformed products. After injection molding, the product needs to be demolded to separate it from the mold for subsequent storage and organization.

[0003] In existing technologies, for products with internal undercuts, after injection molding, the product is separated from the mold by ejector pins. The product then needs to be manually removed from the ejector pins for subsequent storage and organization. However, this method has several drawbacks. First, due to the undercuts, manual removal requires force, which can damage the undercuts if applied unevenly. Second, the product is located between the upper and lower molds during manual removal, and careless handling can lead to contact with either mold, potentially causing cuts to the operator's hands or arms. Utility Model Content

[0004] The purpose of this utility model is to provide a mold for molding products containing internal undercuts, which can solve the above-mentioned technical problems. This utility model provides a mold for molding products containing internal undercuts, including an upper mold assembly and a lower mold assembly, which are respectively mounted on an injection molding machine, and the ejector pin of the injection molding machine passes through the lower mold assembly; it also includes: The first top plate, the second top plate, and the third top plate are sequentially arranged on the lower module; the top roller passes through the lower module and connects to the second top plate; A plurality of first ejector pins and a plurality of second ejector pins are respectively disposed on a first top plate and a second top plate; The linkage mechanism is set on the first top plate and the second top plate; during the mold opening stage, the first top plate and the second top plate move simultaneously through the linkage mechanism; when the first top plate comes into contact with several limiting bodies, the linkage mechanism separates, the first top plate is in a stationary state, and the second top plate continues to move under the push of the ejector pin.

[0005] As a further technical solution, the linkage mechanism includes: A linkage block is set on the first top plate; and a pin block and a pull rod are respectively installed on the linkage block, with one end of the pin block set on the lower module; and one end of the pull rod is installed inside the second and third top plates. The limiting block is inserted into the linkage block; and the other end of the pull rod is inserted into the limiting block and engaged with the limiting block.

[0006] As a further technical solution, it also includes: A movable hole is provided through the second and third top plates; the other end of the pin block is inserted into the movable hole.

[0007] As a further technical solution, a limiting hole is provided in the linkage block, the limiting block passes through the limiting hole, and a spring is sleeved on the limiting block.

[0008] As a further technical solution, a first inclined surface is provided on the pin block; a second inclined surface is provided on the limit block.

[0009] Preferably, there are two linkage mechanisms, which are respectively arranged on both sides of the lower module.

[0010] As a further technical solution, a top block is provided at one end of the first ejector pin.

[0011] As a further technical solution, in the mold-closed state, a molding space is formed between the upper and lower molds, and the top block is placed in the molding space.

[0012] As a further technical solution, one end of the limiting body is set on the lower module; the other end is inserted into the blocking hole that passes through the second and third top plates.

[0013] As a further technical solution, there are two limiting bodies, which are set opposite to each other on the lower module.

[0014] The technical solution of this utility model involves setting a first top plate, a second top plate, and a third top plate on the lower mold assembly. A plurality of first ejectors on the first top plate eject the product from the lower mold assembly in one ejection. After the first ejection, a plurality of second ejectors on the second top plate eject the product a second time, separating the product from the first ejector pins and completing the product demolding. During the first ejection, a linkage mechanism causes the first, second, and third top plates to be simultaneously pushed by ejector pins. During the second ejection, the first top plate stops moving, and the ejector pins push the second and third top plates to move simultaneously. Compared with existing technologies, this utility model completes the product demolding operation through two ejection cycles, eliminating the need for manual product removal and avoiding injuries to the operator's hands or arms during manual operation. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a perspective view of a mold for molding a product containing an internal undercut according to the present invention. Figure 2 This is a schematic diagram of the structure of a mold for forming a product containing internal undercuts according to the present invention; Figure 3 for Figure 2 A sectional view of section AA; Figure 4 for Figure 2 A sectional view of section BB; Figure 5 for Figure 4 Enlarged structural diagram of section X in the middle; Figure 6 This is a structural schematic diagram of a mold for forming a product containing an internal undercut, according to the present invention, from another angle.

[0017] Explanation of reference numerals in the attached figures: 100 - Upper module; 200 - Lower module; 300 - Ejector roller; 401 - First ejector plate; 402 - Second ejector plate; 403 - Third ejector plate; 501 - First ejector pin; 502 - Second ejector pin; 600 - Linkage mechanism; 601 - Linkage block; 602 - Pin block; 603 - Pull rod; 604 - Limiting block; 605 - Movable hole; 606 - Limiting hole; 607 - Spring; 700 - Limiting body; 800 - Ejector block; 900 - Molding space. Detailed Implementation

[0018] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] like Figure 1-6 As shown, this utility model proposes a mold for molding products containing internal undercuts. The system includes an upper mold assembly 100 and a lower mold assembly 200, which are respectively mounted on an injection molding machine. An ejector roller 300 from the injection molding machine passes through the lower mold assembly 200. It should be noted that both the upper mold assembly 100 and the lower mold assembly 200 are existing technologies, and this invention will not further describe them. The system also includes: A first top plate 401, a second top plate 402, and a third top plate 403 are sequentially arranged on the lower mold assembly 200; a top roller 300 passes through the lower mold assembly 200 and connects to the second top plate 402; during use, the top roller 300 pushes the first top plate 401, the second top plate 402, and the third top plate 403 to move linearly within the lower mold assembly 200; a plurality of first ejector pins 501 and a plurality of second ejector pins 502 are respectively arranged on the first top plate 401 and the second top plate 402; under the action of the top roller 300, the first top plate 401... The first ejector pins 501 are driven to move; the second ejector plate 402 drives the second ejector pins 502 to move; during the movement of the first ejector pins 501 and the second ejector pins 502, the third ejector plate 403 limits the movement of the first ejector pins 501 and the second ejector pins 502 to ensure the stability of the movement; and the number of first ejector pins 501 and second ejector pins 502 is determined according to actual needs, and this utility model does not limit it in this respect. The linkage mechanism 600 is installed on the first top plate 401 and the second top plate 402. During the mold opening stage, the linkage mechanism 600 causes the first top plate 401 and the second top plate 402 to move simultaneously. When the first top plate 401 contacts the plurality of limiting bodies 700, the linkage mechanism 600 separates, the first top plate 401 is stationary, and the second top plate 402 continues to move under the push of the ejector roller 300. Specifically, when the first top plate 401 contacts the plurality of limiting bodies 700, the plurality of limiting bodies 700 block the first top plate 401 and generate a tension between the first top plate 401 and the second top plate 402, and the linkage mechanism 600 separates due to the tension. After the linkage mechanism 600 separates, the ejector roller 300 continues to push the second top plate 402 to move. Then, the first ejector pins 501 eject the product once, and the second ejector pins 502 eject the product a second time, thus completing the product demolding.

[0022] It should be noted that one end of the limiting body 700 is set on the lower module 200; the other end passes through the blocking hole that passes through the second top plate 402 and the third top plate 403. When the mold is opened, the blocking hole moves simultaneously with the second top plate 402 and the third top plate 403. Since the first top plate 401 is connected to the second top plate 402 through the linkage mechanism 600, after moving a certain distance, several limiting bodies 700 pass through the blocking hole and contact the first top plate 401, thus restricting the first top plate 401 from continuing to move. In this utility model, it is preferred that there are two limiting bodies 700, which are arranged opposite to each other on the lower module 200. After the two limiting bodies 700 contact the first top plate 401, they limit the first top plate 401 through two points, ensuring the stability of the first top plate 401 after it is limited.

[0023] The technical solution of this utility model involves setting a first top plate 401, a second top plate 402, and a third top plate 403 on the lower mold assembly 200, and using a plurality of first ejector pins 501 set on the first top plate 401 to eject the product on the lower mold assembly 200 in one demolding operation. After the first demolding operation is completed, a plurality of second ejector pins 502 set on the second top plate 402 eject the product a second time, separating the product from the plurality of first ejector pins 501, thus completing the product demolding. In the first... During ejection, the first ejector plate 401, the second ejector plate 402, and the third ejector plate 403 are simultaneously pushed by the ejector roller 300 via the linkage mechanism 600. During the second ejection, the first ejector plate 401 stops moving, and the ejector roller 300 pushes the second ejector plate 402 and the third ejector plate 403 to move simultaneously. Compared with the prior art, the technical solution of this utility model completes the product demolding operation through two ejections. There is no need for manual removal of the product, and it avoids the problem of scratches to the operator's hands or arms during manual operation.

[0024] like Figure 4 and Figure 5As shown, the linkage mechanism 600 includes a linkage block 601, a pin block 602, a pull rod 603, and a limiting block 604. The linkage block 601 is disposed on the first top plate 401. The pin block 602 and the pull rod 603 are respectively inserted through the linkage block 601. One end of the pin block 602 is disposed on the lower mold assembly 200. One end of the pull rod 603 is inserted through the second top plate 402 and the third top plate 403. The limiting block 604 is inserted through the linkage block 601. The other end of the pull rod 603 is inserted through the limiting block 604 and engages with the limiting block 604. When the mold is closed, the pull rod 603 is placed inside the limiting block 604 and engages with the limiting block 604. When the mold is opened, the linkage block 601 follows. The first top plate 401 simultaneously ejects once. When the first top plate 401 contacts the limiting body 700, it stops moving. Since the pin block 602 is set on the lower module 200, during the movement of the first top plate 401, the limiting block 604 contacts the protruding surface of the pin block 602 and is compressed under the push of the protruding surface. During the compression process, the limiting block 604 separates from the pull rod 603. In addition, since the pull rod 603 is connected to the second top plate 402 and the third top plate 403 respectively, the second top plate 402 and the third top plate 403 can be connected through the pull rod 603, thus avoiding the situation where the second top plate 402 and the third top plate 403 separate during use. Under the action of the ejector roller 300, the second ejector plate 402 continues to move. At this time, since the pull rod 603 is set on the second ejector plate 402 and the third ejector plate 403, the pull rod 603 is separated from the limit block 604 under the pull of the second ejector plate 402 and the third ejector plate 403; and continues to move under the push of the ejector roller 300 for secondary ejection; when the mold is closed, the first ejector plate 401 is reset, and drives the limit block 604 to separate from the protruding surface of the pin block 602 and reset, and the pull rod 603 is reinserted into the limit block 604.

[0025] It should be noted that movable holes 605 are provided through the second top plate 402 and the third top plate 403, and the other end of the pin block 602 passes through the movable hole 605. During mold opening and closing, one end of the pin block 602 can move in the movable hole 605. At the same time, a limiting hole 606 is provided in the linkage block 601, and a limiting block 604 passes through the limiting hole 606. A spring 607 is sleeved on the limiting block 604. During mold closing, the pull rod 603 passes through the limiting block 604 and engages with the limiting block 604. During mold opening, the limiting block 604 contacts the protruding surface of the pin block 602, causing the limiting block 604 to retract into the limiting hole 606 and compress the spring 607. During mold closing, the limiting block 604 separates from the protruding surface of the pin block 602, and the limiting block 604 is reset under the action of the spring 607.

[0026] Furthermore, a first inclined surface is provided on the pin block 602; a second inclined surface is provided on the limiting block 604; during mold opening or closing, the first and second inclined surfaces can cooperate to facilitate transition, thereby enabling the limiting block 604 to contact or separate more smoothly from the protruding surface on the pin block 602; there are two linkage mechanisms 600, which are respectively provided on both sides of the lower mold group 200; during mold opening, the two linkage mechanisms 600 can cooperate to limit the first top plate 401, ensuring the stability of the first top plate 401 during the movement process.

[0027] like Figure 2 As shown, one end of the first ejector pin 501 is provided with an ejector block 800; and in the mold-closed state, a molding space 900 is formed between the upper mold assembly 100 and the lower mold assembly 200, and the ejector block 800 is placed in the molding space 900; thus, after injection molding, the molded product will be placed on the ejector block 800, and under the push of the first ejector plate 401, the ejector block 800 and the product will be ejected simultaneously by several first ejector pins 501; and under the push of several second ejector pins 502, the product will be ejected from the ejector block 800.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A mold for molding products containing internal undercuts, The injection molding machine comprises an upper mold set (100) and a lower mold set (200), the upper mold set (100) and the lower mold set (200) are arranged on an injection molding machine respectively, and a top pin (300) on the injection molding machine is arranged on the lower mold set (200), characterized in that, Also includes: The first top plate (401), the second top plate (402), and the third top plate (403) are sequentially arranged on the lower module (200); the top rod (300) passes through the lower module (200) and connects to the second top plate (402); A plurality of first ejector pins (501) and a plurality of second ejector pins (502) are respectively disposed on the first top plate (401) and the second top plate (402); A linkage mechanism (600) is provided on the first top plate (401) and the second top plate (402); during the mold opening stage, the first top plate (401) and the second top plate (402) move simultaneously through the linkage mechanism (600); when the first top plate (401) contacts a number of limiting bodies (700), the linkage mechanism (600) separates, the first top plate (401) is in a stationary state, and the second top plate (402) continues to move under the push of the top roller (300).

2. The mold for molding a product having an internal undercut according to claim 1, wherein The linkage mechanism (600) includes: A linkage block (601) is disposed on the first top plate (401); and a pin block (602) and a pull rod (603) are respectively disposed on the linkage block (601), one end of the pin block (602) is disposed on the lower module (200); and one end of the pull rod (603) is disposed in the second top plate (402) and the third top plate (403); The limiting block (604) is inserted into the linkage block (601); and the other end of the pull rod (603) is inserted into the limiting block (604) and engaged with the limiting block (604).

3. The mold for molding a product having an internal undercut according to claim 2, wherein Also includes: An active hole (605) is provided through the second top plate (402) and the third top plate (403); the other end of the pin block (602) is provided through the active hole (605).

4. The mold for molding a product having an internal undercut according to claim 2, wherein The linkage block (601) is provided with a limiting hole (606), the limiting block (604) passes through the limiting hole (606), and a spring (607) is sleeved on the limiting block (604).

5. The mold for molding a product having an internal undercut according to claim 2, wherein The pin block (602) is provided with a first inclined surface; the limiting block (604) is provided with a second inclined surface.

6. The mold for molding a product having an internal undercut according to claim 1, wherein There are two linkage mechanisms (600), which are respectively located on both sides of the lower module (200).

7. The mold for molding a product having an internal undercut according to Claim 1, wherein One end of the first ejector pin (501) is provided with a top block (800).

8. The mold for molding a product having an internal undercut according to claim 7, wherein In the mold-closed state, a molding space (900) is formed between the upper mold assembly (100) and the lower mold assembly (200), and the top block (800) is placed in the molding space (900).

9. The mold for molding a product having an internal undercut according to Claim 1, wherein One end of the limiting body (700) is disposed on the lower module (200); the other end is disposed in the blocking hole that passes through the second top plate (402) and the third top plate (403).

10. The mold for molding a product having an internal undercut according to claim 9, wherein There are two limiting bodies (700), which are arranged opposite to each other on the lower module (200).

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