Inner hole core-pulling structure of 90-degree bent pipe

Abstract

The utility model discloses a 90-degree elbow pipe inner hole core-pulling structure, which relates to the technical field of injection molds and comprises a mold base, and a periodic full-automatic core-pulling component is arranged at the top end of an injection mold bottom mold. According to the 90-degree elbow pipe inner hole core-pulling structure, through the arrangement of the first travel switch, the second travel switch and the first touch block, when the 90-degree elbow pipe inner hole core-pulling structure is used, the first hydraulic oil cylinder pulls the first sliding block backwards along the first sliding base, a first elbow pipe inner buckle at the front end of the first sliding block synchronously retracts backwards and is separated from an elbow pipe, and the first touch block moves to the first travel switch from the second travel switch; the second hydraulic oil cylinder pulls the second sliding block backwards along the second sliding seat, the second bent pipe inner buckle synchronously retracts and is separated from the bent pipe, core pulling is completed, at the moment, the second collision block moves to the third travel switch from the fourth travel switch, the mold is opened, bent pipe materials can be taken out, and the periodic full-automatic core pulling function is achieved; the problem that a device does not have a periodic full-automatic core pulling function is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mold technical field, concretely is 90 degree elbow hole core pulling structure. BACKGROUND

[0002] The core pulling mechanism is a common mechanism in a mold, is driven to complete core pulling by the oil cylinder, is used for producing the product such as elbow on the parting surface that cannot demould.

[0003] The common 90 degree elbow hole core pulling structure on the market adopts the oil cylinder drive core pulling assembly, and the stroke of the assembly is controlled by the oil cylinder stroke, and the whole core pulling period depends on the hydraulic control system, and the accuracy is insufficient, and periodic internal full-automatic operation cannot be achieved, and the function of periodic full-automatic core pulling is not possessed.

[0004] Now, a kind of new 90 degree elbow hole core pulling structure is proposed to solve the above problems. Utility model content

[0005] The utility model is to provide 90 degree elbow hole core pulling structure to solve the problem of not possessing the function of periodic full-automatic core pulling in the background technique.

[0006] To achieve the above object, the utility model provides the following technical scheme: 90 degree elbow hole core pulling structure, including mold base, the both sides of the top of mold base are fixedly connected with support block, the top of support block is fixedly connected with injection bottom die, the lower portion of injection bottom die is provided with movable plate, the middle position of movable plate top is installed with demoulding ejector rod, the four corners of movable plate top end are respectively provided with reset spring rod, the top of injection bottom die is provided with periodic full-automatic core pulling assembly.

[0007] The core-pulling assembly includes a first oil cylinder fixing frame fixedly connected at the rear end of the injection mold bottom mold, a first hydraulic oil cylinder mounted at the rear end of the first oil cylinder fixing frame, a first stroke switch mounted at the rear end of the left side of the first oil cylinder fixing frame, a second stroke switch mounted at the front end of the left side of the first oil cylinder fixing frame, a first slide fixedly connected at the middle position of the top right side of the injection mold bottom mold, a first slide block inserted into the first slide, a first impact block fixedly connected at the rear end of the left side of the first slide block, a first elbow inner buckle movably connected at the front end of the first slide block, a second oil cylinder fixing frame fixedly connected at the right side of the injection mold bottom mold, a second hydraulic oil cylinder mounted at the right side of the second oil cylinder fixing frame, a third stroke switch mounted at the right side of the front end of the second oil cylinder fixing frame, a fourth stroke switch mounted at the left side of the front end of the second oil cylinder fixing frame, a second slide mounted at the middle position of the top right side of the injection mold bottom mold, a second slide block provided in the second slide, a second elbow inner buckle movably connected at the left side of the second slide block, a second impact block fixedly connected at the front end of the second slide block, a distribution valve fixedly connected at the right side of the support block, two groups of first oil pipes mounted between the left side of the distribution valve and the rear end of the second hydraulic oil cylinder, and two groups of second oil pipes mounted between the rear end of the distribution valve and the right side of the first hydraulic oil cylinder.

[0008] Preferably, the front end of the first hydraulic oil cylinder is connected with the rear end of the first slide block, and the first slide block can be displaced forward and backward along the inside of the first slide.

[0009] Preferably, the left side of the second hydraulic oil cylinder is connected with the right side of the second slide block, and the second slide block can slide left and right along the inside of the second slide.

[0010] Preferably, the first elbow inner buckle and the second elbow inner buckle are the same in shape and size, and the first slide and the second slide are the same in specification.

[0011] Preferably, the distal ends of the first elbow inner buckle and the second elbow inner buckle are in contact, and the first elbow inner buckle and the second elbow inner buckle are not connected.

[0012] Preferably, the distance between the first stroke switch and the second stroke switch is consistent with the distance between the third stroke switch and the fourth stroke switch, and the first stroke switch, the second stroke switch, the third stroke switch and the fourth stroke switch are the same in specification.

[0013] Compared with the prior art, the 90° elbow inner hole core-pulling structure realizes the function of periodic full-automatic core pulling.

[0014] (1) through the first travel switch, the second travel switch, the first collision block, the third travel switch, the fourth travel switch and the second collision block, in use, the top die and the injection mold of the injection molding equipment are closed and injection molding, after the injection molding cycle is completed, the plastic is cooled, the first hydraulic cylinder and the second hydraulic cylinder retract synchronously, the first hydraulic cylinder pulls the first slider along the first slide, the first elbow inner buckle at the front end of the first slider is retracted synchronously, and the first collision block moves from the second travel switch to the first travel switch, the second hydraulic cylinder pulls the second slider along the second slide, the second elbow inner buckle is retracted synchronously, and the second collision block is removed from the fourth travel switch to the third travel switch, the mold is opened, and the elbow material can be taken out, with the mold closing, the first hydraulic cylinder and the second hydraulic cylinder extend synchronously, the first collision block moves from the first travel switch to the second travel switch, and the second collision block moves from the third travel switch to the fourth travel switch, the travel switch controls the stroke of the cylinder, the core-pulling is more accurate and stable, and with the opening and closing of the cylinder, the travel switch can control the cylinder to extend and retract automatically, realizing the function of periodic automatic core-pulling. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a front view structural schematic diagram of the utility model;

[0016] Figure 2 It is a front view structural schematic diagram of the utility model;

[0017] Figure 3 It is a front view structural schematic diagram of the utility model;

[0018] Figure 4 It is an explosion structural schematic diagram of the utility model.

[0019] In the drawing: 1, mold base; 2, support block; 3, moving plate; 4, demolding ejector rod; 5, reset spring rod; 6, injection mold; 7, first cylinder fixing frame; 8, first hydraulic cylinder; 9, first travel switch; 10, second travel switch; 11, first slide; 12, first slider; 13, first collision block; 14, first elbow inner buckle; 15, second cylinder fixing frame; 16, second hydraulic cylinder; 17, first oil pipe; 18, third travel switch; 19, fourth travel switch; 20, second slide; 21, second slider; 22, second collision block; 23, second elbow inner buckle; 24, distribution valve; 25, second oil pipe. DETAILED DESCRIPTION

[0020] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0021] Embodiment 1: please refer to Figures 1-4 , the 90° elbow inner hole core-pulling structure, including the mold base 1, the both sides of the top of the mold base 1 are fixedly connected with support block 2, the top end of support block 2 is fixedly connected with injection mold base 6, the lower portion of injection mold base 6 is provided with dynamic plate 3, the top of dynamic plate 3 is installed with stripping ejector rod 4 at the middle position, the four corners of the top end of dynamic plate 3 are provided with reset spring rod 5 respectively, the top end of injection mold base 6 is provided with periodic full-automatic core-pulling assembly;

[0022] please refer to Figures 1-4 , the 90° elbow inner hole core-pulling structure further includes core-pulling assembly, the core-pulling assembly includes first oil cylinder fixing frame 7, the rear end of first oil cylinder fixing frame 7 is fixedly connected with injection mold base 6, the rear end of first oil cylinder fixing frame 7 is installed with first hydraulic oil cylinder 8, the rear end of the left side of first oil cylinder fixing frame 7 is installed with first travel switch 9, the front end of the left side of first oil cylinder fixing frame 7 is installed with second travel switch 10, the middle position of the top rear end of injection mold base 6 is fixedly connected with first sliding seat 11, the inside of first sliding seat 11 is inserted with first sliding block 12, the rear end of the left side of first sliding block 12 is fixedly connected with first knock block 13, the front end of first sliding block 12 is movably connected with first elbow inner buckle 14, the right side of injection mold base 6 is fixedly connected with second oil cylinder fixing frame 15, the right side of second oil cylinder fixing frame 15 is installed with second hydraulic oil cylinder 16, the right side of the front end of second oil cylinder fixing frame 15 is installed with third travel switch 18, the left side of the front end of second oil cylinder fixing frame 15 is installed with fourth travel switch 19, the middle position of the top right side of injection mold base 6 is installed with second sliding seat 20, the inside of second sliding seat 20 is provided with second sliding block 21, the left side of second sliding block 21 is movably connected with second elbow inner buckle 23, the front end of second sliding block 21 is fixedly connected with second knock block 22, the right side of support block 2 is fixedly connected with distribution valve 24, two groups of first oil pipe 17 are installed between the left side of distribution valve 24 and the rear end of second hydraulic oil cylinder 16, two groups of second oil pipe 25 are installed between the rear end of distribution valve 24 and the right side of first hydraulic oil cylinder 8;

[0023] The front end of the first hydraulic oil cylinder 8 is connected with the rear end of the first sliding block 12, the first sliding block 12 can be displaced forward and backward along the inside of the first sliding seat 11, the left side of the second hydraulic oil cylinder 16 is connected with the right side of the second sliding block 21, the second sliding block 21 can slide left and right along the inside of the second sliding seat 20, the first elbow inner buckle 14 and the second elbow inner buckle 23 are same in shape and size, the first sliding seat 11 and the second sliding seat 20 are same in specification, the ends of the first elbow inner buckle 14 and the second elbow inner buckle 23 are in contact, the first elbow inner buckle 14 and the second elbow inner buckle 23 are not connected, the distance between the first stroke switch 9 and the second stroke switch 10 is same with the distance between the third stroke switch 18 and the fourth stroke switch 19, the first stroke switch 9, the second stroke switch 10, the third stroke switch 18 and the fourth stroke switch 19 are same in specification, and can be automatically operated periodically;

[0024] Specifically, as shown in Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , the first hydraulic oil cylinder 8 pulls the first sliding block 12 backward along the first sliding seat 11, the first elbow inner buckle 14 at the front end of the first sliding block 12 is synchronously pulled backward and is pulled out of the elbow pipe, the first impact block 13 is moved from the second stroke switch 10 to the first stroke switch 9, the second hydraulic oil cylinder 16 pulls the second sliding block 21 backward along the second sliding seat 20, the second elbow inner buckle 23 is synchronously pulled backward and is pulled out of the elbow pipe, and the core pulling is completed, at this time, the second impact block 22 is moved from the fourth stroke switch 19 to the third stroke switch 18, the mold is opened, and the elbow pipe material can be taken out.

[0025] Working principle: when the utility model is used, first, the top mold and the injection mold bottom mold 6 of the injection molding equipment are closed and injection molding is performed, after the injection molding cycle is completed, the plastic is cooled, the first hydraulic oil cylinder 8 and the second hydraulic oil cylinder 16 are synchronously retracted, the first hydraulic oil cylinder 8 pulls the first sliding block 12 backward along the first sliding seat 11, the first elbow inner buckle 14 at the front end of the first sliding block 12 is synchronously pulled backward and is pulled out of the elbow pipe, the first impact block 13 is moved from the second stroke switch 10 to the first stroke switch 9, the second hydraulic oil cylinder 16 pulls the second sliding block 21 backward along the second sliding seat 20, the second elbow inner buckle 23 is synchronously pulled backward and is pulled out of the elbow pipe, and the core pulling is completed, at this time, the second impact block 22 is moved from the fourth stroke switch 19 to the third stroke switch 18, the mold is opened, and the elbow pipe material can be taken out, with the mold closing, the first hydraulic oil cylinder 8 and the second hydraulic oil cylinder 16 are synchronously extended, the first impact block 13 is moved from the first stroke switch 9 to the second stroke switch 10, the second impact block 22 is moved from the third stroke switch 18 to the fourth stroke switch 19, the stroke of the oil cylinder is controlled through the four groups of stroke switches, the core pulling is more accurate and stable, and with the opening and closing of the oil cylinder, the stroke switch can control the self-extension and retraction of the oil cylinder.

[0026] It is apparent for a person skilled in the art that the present application is not restricted to the details of the above exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary only, and not limiting, the scope of the present application being defined by the appended claims rather than the above description, and all changes coming within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims concerned.

Claims

1. A core-pulling structure for the inner hole of a 90° elbow, comprising a die base (1), characterized in that: The top of the mold base (1) is respectively fixedly connected with support block (2), the top of the support block (2) is fixedly connected with injection bottom die (6), the lower portion of the injection bottom die (6) is provided with a movable plate (3), the top of the movable plate (3) is provided with a stripping ejector rod (4), the four corners of the top of the movable plate (3) are respectively provided with a reset spring rod (5), the top of the injection bottom die (6) is provided with a periodic full-automatic core-pulling assembly; The core-pulling assembly includes a first oil cylinder fixed frame (7), the rear end of the first oil cylinder fixed frame (7) is fixedly connected with the injection bottom die (6), the rear end of the first oil cylinder fixed frame (7) is provided with a first hydraulic oil cylinder (8), the rear end of the left side of the first oil cylinder fixed frame (7) is provided with a first travel switch (9), the front end of the left side of the first oil cylinder fixed frame (7) is provided with a second travel switch (10), the middle position of the rear end of the top of the injection bottom die (6) is fixedly connected with a first sliding seat (11), the inside of the first sliding seat (11) is inserted with a first sliding block (12), the rear end of the left side of the first sliding block (12) is fixedly connected with a first impact block (13), the front end of the first sliding block (12) is movably connected with a first elbow pipe inner buckle (14), the right side of the injection bottom die (6) is fixedly connected with a second oil cylinder fixed frame (15), the right side of the second oil cylinder fixed frame (15) is provided with a second hydraulic oil cylinder (16), the right side of the front end of the second oil cylinder fixed frame (15) is provided with a third travel switch (18), the left side of the front end of the second oil cylinder fixed frame (15) is provided with a fourth travel switch (19), the middle position of the right side of the top of the injection bottom die (6) is provided with a second sliding seat (20), the inside of the second sliding seat (20) is provided with a second sliding block (21), the left side of the second sliding block (21) is movably connected with a second elbow pipe inner buckle (23), the front end of the second sliding block (21) is fixedly connected with a second impact block (22), the right side of the support block (2) is fixedly connected with a distribution valve (24), the left side of the distribution valve (24) and the rear end of the second hydraulic oil cylinder (16) are provided with two groups of first oil pipes (17), the rear end of the distribution valve (24) and the right side of the first hydraulic oil cylinder (8) are provided with two groups of second oil pipes (25).

2. The 90° elbow inner hole core-pulling structure according to claim 1, characterized in that: The front end of the first hydraulic oil cylinder (8) is connected with the rear end of the first sliding block (12), and the first sliding block (12) can be displaced back and forth along the inside of the first sliding seat (11).

3. The 90° elbow inner hole core-pulling structure according to claim 1, characterized in that: The left side of the second hydraulic oil cylinder (16) is connected with the right side of the second sliding block (21), and the second sliding block (21) can slide left and right along the inside of the second sliding seat (20).

4. The 90° elbow inner hole core-pulling structure according to claim 1, characterized in that: The first elbow pipe inner buckle (14) and the second elbow pipe inner buckle (23) are the same in shape and size, and the first sliding seat (11) and the second sliding seat (20) are the same in specification.

5. The 90° elbow core-pulling structure according to claim 1, characterized in that: The first elbow pipe inner buckle (14) and the second elbow pipe inner buckle (23) are in contact at the ends, but are not connected.

6. The 90° elbow core-draw structure of claim 1, wherein: The distance between the first travel switch (9) and the second travel switch (10) is consistent with the distance between the third travel switch (18) and the fourth travel switch (19), and the specifications of the first travel switch (9), the second travel switch (10), the third travel switch (18) and the fourth travel switch (19) are the same.

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