Long-strip-shaped plastic part injection mold

Abstract

The utility model discloses a long-strip-shaped plastic part injection mold, which relates to the technical field of injection molds and comprises a lower mold base, an upper mold base, a plastic cavity, a plastic part and a stripping assisting mechanism, the separation assisting mechanism comprises a cavity, a driving assembly and a plurality of ejector assemblies; the driving assembly comprises an upper plate, a plurality of groups of first elastic pieces, a first expansion piece, a first connecting rod, a plate hole, a pulling plate, a lower plate, a plurality of groups of second elastic pieces, a second expansion piece and a second connecting rod; the ejector component comprises an outer pin hole, a sleeve ejector pin, an inner pin hole and an inner ejector pin; the injection mold has the advantages that when the driving assembly runs and the upper plate moves upwards, the sleeve ejector pin can be driven to movably move upwards in the outer pin hole so as to jack up a plastic part in a plastic cavity and demold the plastic part, and when the lower plate moves upwards, the inner ejector pin can be driven to movably move upwards in the inner pin hole so as to demold the plastic part. And the plastic part sleeved with the ejector pin is jacked up again, so that the contact surface of the plastic part and the jacking part assembly is reduced, and demolding is assisted.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mold technical field more specifically relates to a long strip plastic part injection mold. BACKGROUND

[0002] Injection mold, it is a kind of tool for plastic product production, it is by the molten state plastic injection into the mold cavity of pre-design, after cooling solidification, the plastic part of taking out forming.It can manufacture the various plastic products of complex shape, accurate size, is widely used in automobile, home appliance, electronic product, toy and multiple industries;

[0003] The existing injection mold "as shown in application No. CN202323644732.8, a multi-gate interior part injection mold", is provided with "ejector rod" to facilitate stripping, and when long strip plastic part injection is carried out, it is necessary to set "ejector rod" in the larger and long range, and multiple groups need to be set to provide better support, but in this way, the surface of "ejector rod" connected with the formed long strip plastic part is increased, and there is the defect of inconvenient stripping. INNOVATION CONTENT

[0004] The utility model discloses a long strip plastic part injection mold, which is used to solve the above technical problems.

[0005] The utility model discloses a long strip plastic part injection mold, which is used to solve the above technical problems.

[0006] The utility model discloses a long strip plastic part injection mold, which is used to solve the above technical problems.

[0007] The stripping assisting mechanism includes a cavity, a driving assembly fixed in the cavity and a plurality of top piece assemblies fixed on the driving assembly.

[0008] The driving assembly includes an upper plate, a plurality of first elastic members fixed between the top end of the upper plate and the cavity, a first telescopic device fixed to the top end of the cavity, a first connecting rod with one end fixed to the output end of the first telescopic device, a plate hole penetrating through the upper and lower sides of the upper plate, a pull plate fixed to the other end of the first connecting rod, a lower plate arranged below the upper plate, a plurality of second elastic members fixed between the upper plate and the lower plate, a second telescopic device fixed to the bottom end of the cavity, and a second connecting rod with one end fixed to the output end of the second telescopic device.

[0009] The top assembly comprises an outer needle hole communicating with the plastic cavity and the cavity, a sleeve top needle movably arranged in the outer needle hole, an inner needle hole arranged in the sleeve top needle, and an inner top needle movably arranged in the inner needle hole, one needle end of the sleeve top needle and the inner top needle respectively movably abuts against the plastic part, the other needle end of the sleeve top needle is fixed to the upper plate, the other needle end of the inner top needle is fixed to the lower plate, and the inner needle hole penetrates through the upper plate and the lower plate.

[0010] As a preferred technical scheme of the utility model, the first elastic members of the multiple groups are evenly distributed between the top end of the upper plate and the cavity.

[0011] As a preferred technical scheme of the utility model, the second elastic members of the multiple groups are evenly distributed between the upper plate and the lower plate.

[0012] As a preferred technical scheme of the utility model, the top end of the upper die seat is provided with a material injection opening communicating with the plastic cavity.

[0013] As a preferred technical scheme of the utility model, the bottom end of the upper die seat is fixedly provided with a guide column, the top end of the lower die seat is provided with a column groove, and the guide column movably arranged in the column groove.

[0014] The utility model has the advantages as follows:

[0015] When the upper plate moves upward, the sleeve top needle moves upward in the outer needle hole, the plastic part in the plastic cavity is lifted, and the demolding of the plastic part is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic view of the utility model;

[0017] Figure 2 is Figure 1 a partial structure A schematic view of the utility model.

[0018] Reference signs: lower die seat-1, upper die seat-2, plastic cavity-3, plastic part-4, demolding assisting mechanism-5, material injection opening-6, guide column-7, column groove-8, upper plate-521, first elastic member-522, first telescopic device-523, first connecting rod-524, plate hole-525, pull plate-526, lower plate-527, second elastic member-528, second telescopic device-529, second connecting rod-5210, outer needle hole-531, sleeve top needle-532, inner needle hole-533, inner top needle-534. DETAILED DESCRIPTION

[0019] As Figures 1-2As shown, the utility model provides: a long strip plastic part injection mold, including lower die seat 1, upper die seat 2 in the top end of lower die seat 1, the plastic cavity 3 formed between the adhesion of lower die seat 1 and upper die seat 2, the plastic cavity 3 is formed in the central position when the upper die seat 2 is adhered to the top end of lower die seat 1;

[0020] Upper die seat 2 top end is equipped with the injection port 6 of communication with plastic cavity 3, the plastic part 4 in plastic cavity 3, by injection port 6 will be placed into plastic cavity 3 with plastic pulp, to form plastic part 4;

[0021] And the release mechanism 5 of fixed mounting on lower die seat 1 is used for the release of the plastic part 4 formed with power assistance;

[0022] Among them, the upper die seat 2 bottom is fixed with guide column 7, and the lower die seat 1 top end is equipped with column groove 8, and the guide column 7 is movable in the column groove 8, and when the upper die seat 2 is moved up and down, the guide column 7 is placed into the column groove 8 to provide guiding and positioning effect, and provides power assistance for the adhesion of upper die seat 2 and lower die seat 1;

[0023] The specific implementation structure of the above-mentioned release mechanism 5 is as follows:

[0024] Release mechanism 5 includes cavity 51, drive assembly 52 fixed in cavity 51, and a plurality of top piece assemblies 53 fixed on drive assembly 52, as shown, a plurality of top piece assemblies 53 are evenly distributed at drive assembly 52.

[0025] Further, the structure of the drive assembly 52 is as follows:

[0026] The drive assembly 52 includes upper plate 521, a plurality of first elastic members 522 fixed between the top end of the upper plate 521 and the cavity 51, a first telescopic device 523 fixed to the top end of the cavity 51, a first connecting rod 524 with one end fixed to the output end of the first telescopic device 523, a plate hole 525 penetrating through the upper and lower sides of the upper plate 521, a pull plate 526 fixed to the other end of the first connecting rod 524, a lower plate 527 arranged below the upper plate 521, a plurality of second elastic members 528 fixed between the upper plate 521 and the lower plate 527, a second telescopic device 529 fixed to the bottom end of the cavity 51, and a second connecting rod 5210 with one end fixed to the output end of the second telescopic device 529, the first connecting rod 524 is movable in the plate hole 525, the pull plate 526 is between the upper plate 521 and the lower plate 527, and when the pull plate 526 moves up, the plate hole 525 blocks the pull plate 526, and the other end of the second connecting rod 5210 is movable and adhered to the bottom end of the lower plate 527;

[0027] The first elastic member 522 and the second elastic member 528 are springs, and provide elastic support between the top end of the upper plate 521 and the cavity 51, and between the upper plate 521 and the lower plate 527, respectively. The first telescopic device 523 is an electric push rod or the like, and is centrally located above the upper plate 521. The elastic force of the first elastic member 522 is greater than that of the second elastic member 528.

[0028] When the driving assembly 52 is applied: by starting the first telescopic device 523 to operate, the first connecting rod 524 and the pull plate 526 can be driven to move up and down. When moving upwards, the top end of the pull plate 526 contacts the bottom end of the upper plate 521, and the upper plate 521 is pulled upwards. The first elastic member 522 provides compressed elastic support for the upper plate 521. Then, by starting the second telescopic device 529 to operate, the second connecting rod 5210 can be driven to move up and down. When moving upwards, the top end of the connecting rod 5210 contacts the bottom end of the lower plate 527, and the upper plate 521 is pushed upwards. At this time, the second elastic member 528 provides compressed elastic support for the lower plate 527.

[0029] Among them, multiple first elastic members 522 are evenly distributed between the top end of the upper plate 521 and the cavity 51. Multiple second elastic members 528 are evenly distributed between the upper plate 521 and the lower plate 527, and are reasonably distributed to improve the stability of the elastic support.

[0030] Further, the structure of the driving assembly 52 is as follows:

[0031] The top piece assembly 53 includes an outer needle hole 531 that communicates with the plastic cavity 3 and the cavity 51, a sleeve top needle 532 that moves within the outer needle hole 531, an inner needle hole 533 that is provided within the sleeve top needle 532, and an inner top needle 534 that moves within the inner needle hole 533. One needle end of the sleeve top needle 532 and the inner top needle 534 respectively moves and fits the plastic piece 4. The other needle end of the sleeve top needle 532 is fixed to the upper plate 521, and the other needle end of the inner top needle 534 is fixed to the lower plate 527. The inner needle hole 533 penetrates both ends of the upper plate 521;

[0032] When the driving assembly 52 is applied: the bottom end of the sleeve top needle 532 is fixed to the top end of the upper plate 521. When the upper plate 521 moves upwards, the sleeve top needle 532 can be driven to move upwards within the outer needle hole 531, so as to lift the plastic piece 4 in the plastic cavity 3, and provide demolding treatment for the plastic piece 4. The bottom end of the inner top needle 534 is fixed to the top end of the lower plate 527. When the lower plate 527 moves upwards, the inner top needle 534 can be driven to move upwards within the inner needle hole 533, so as to lift the plastic piece 4 at the sleeve top needle 532, thereby reducing the contact area of the plastic piece 4 with the top piece assembly 53, and assisting in demolding;

[0033] According to the above, when the first telescopic device 523 and the second telescopic device 529 are reset, the elastic force of the first elastic member 522 and the second elastic member 528 drives the driving assembly 52 to reset, the first telescopic device 523 and the second telescopic device 529 adopt the mode of pushing and pulling the force by fixing the upper plate 521 and the lower plate 527, and when the force is not applied, the trace tension is not easy to generate, and the first telescopic device 523 and the second telescopic device 529 do not need to be extremely accurate in control operation.

[0034] The controller is a PLC controller (not shown in the figure), which is connected to an external power supply to supply power to the electrical components and to open and close.

[0035] As shown in Figure 2 The upper end of the inner top needle 534 is also provided with a head to fit the inner needle hole 533, so as to close the outer needle hole 531 and the inner needle hole 533, and provide the sealing property of the plastic cavity 3 during injection molding.

[0036] The control mode of the utility model is controlled by manually starting and closing the switch, and the wiring diagram of the power element and the power supply belong to the common knowledge in the art, and the utility model is mainly used for protecting the mechanical device, so the control mode and the wiring arrangement of the utility model will not be explained in detail.

[0037] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above, and it is obvious for those skilled in the art that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the utility model is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0038] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, and those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can be properly combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A long strip plastic part injection mold, comprising a lower mold base (1), an upper mold base (2) at the top end of the lower mold base (1), a plastic cavity (3) formed between the abutment of the lower mold base (1) and the upper mold base (2), a plastic part (4) arranged in the plastic cavity (3), and a stripping mechanism (5) fixed to the lower mold base (1). The stripping mechanism (5) comprises a cavity (51), a driving assembly (52) fixed in the cavity (51), and a plurality of top piece assemblies (53) fixed to the driving assembly (52). characterized in that The driving assembly (52) comprises an upper plate (521), a plurality of first elastic members (522) fixed between the top end of the upper plate (521) and the cavity (51), a first telescopic device (523) fixed to the top end of the cavity (51), a first connecting rod (524) with one end fixed to the output end of the first telescopic device (523), a plate hole (525) penetrating through the upper and lower sides of the upper plate (521), a pull plate (526) fixed to the other end of the first connecting rod (524), a lower plate (527) arranged below the upper plate (521), a plurality of second elastic members (528) fixed between the upper plate (521) and the lower plate (527), a second telescopic device (529) fixed to the bottom end of the cavity (51), and a second connecting rod (5210) with one end fixed to the output end of the second telescopic device (529), the first connecting rod (524) being movable in the plate hole (525), the pull plate (526) being between the upper plate (521) and the lower plate (527), and the plate hole (525) blocking the pull plate (526) when the pull plate (526) moves upward, and the other end of the second connecting rod (5210) being movably abutted to the bottom end of the lower plate (527). The top piece assembly (53) comprises an outer needle hole (531) communicating with the plastic cavity (3) and the cavity (51), a sleeve top needle (532) movably arranged in the outer needle hole (531), an inner needle hole (533) arranged in the sleeve top needle (532), and an inner top needle (534) movably arranged in the inner needle hole (533), one needle end of the sleeve top needle (532) and the inner top needle (534) being movably abutted to the plastic part (4) respectively, the other needle end of the sleeve top needle (532) being fixed to the upper plate (521), the other needle end of the inner top needle (534) being fixed to the lower plate (527), and the inner needle hole (533) penetrating through the upper and lower plate ends of the upper plate (521).

2. The mold for injection molding a long strip-shaped plastic member according to claim 1, wherein The plurality of first elastic members (522) are uniformly distributed between the top end of the upper plate (521) and the cavity (51).

3. The mold for injection molding long plastic parts according to claim 1, wherein, The plurality of second elastic members (528) are uniformly distributed between the upper plate (521) and the lower plate (527).

4. The mold for injection molding long plastic parts according to claim 1, wherein, The top end of the upper mold base (2) is provided with an injection port (6) communicating with the plastic cavity (3).

5. The mold for injection molding long plastic parts according to claim 1, wherein, The bottom end of the upper mold base (2) is fixed with a guide column (7), and the top end of the lower mold base (1) is provided with a column groove (8), the guide column (7) being movably arranged in the column groove (8).

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