Injection mold with needle drawing structure

Abstract

The injection mold comprises an upper mold assembly and a lower mold frame corresponding to the upper mold assembly, the upper mold assembly comprises a top cover, an upper mold frame, a mold core, a movable seat and an inclined rod, the top cover is longitudinally connected with the upper mold frame in a sliding mode, the upper mold frame is detachably connected with the mold core, the movable seat is transversely connected with the upper mold frame in a sliding mode, and the inclined rod is detachably connected with the mold core. The top cover is provided with an inclined rod used for positioning the movable seat, the mold core is provided with cavities distributed in a linear mode, and a drawing needle penetrating through the cavities is arranged on the side, facing the mold core, of the movable seat. The utility model mainly aims to connect the mold core to the upper mold frame in a pin clamping manner, so that the mold cores with different cavities are convenient to replace, the application range is wide, the injection molding part forms a plurality of mounting parts through the cavities, each mounting part is provided with a connecting hole through the drawing needle, the whole structure is simple, the transmission is stable, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an injection mold with a needle extraction structure. Background Art

[0002] Injection molds are usually composed of two sets of upper and lower mold frames. During injection molding, the mold is clamped on the injection molding machine, and the molten plastic is injected into the molding cavity and cooled and shaped in the cavity. Then the upper and lower molds are separated, and the plastic parts are ejected from the mold cavity through the ejection system. In order to meet the product structure requirements, some plastic parts need to have openings facing the connection holes perpendicular to the mold opening direction. In order to meet the needs of one-time injection molding, an independent pneumatic structure with a pin extraction needle will be installed on the side of the mold, making the mold structure complex and the production cost high. Utility Model Content

[0003] In order to overcome the shortcomings of the background technology, the technical solution adopted by the utility model is: an injection mold with a needle extraction structure, including an upper mold assembly, and a lower mold frame corresponding to the upper mold assembly, the upper mold assembly includes a top cover, an upper mold frame, a mold core, a movable seat and an inclined rod, the top cover is longitudinally slidingly connected to the upper mold frame, the upper mold frame is detachably connected to the mold core, the movable seat is transversely slidingly connected to the upper mold frame, the top cover is provided with an inclined rod for positioning the movable seat, the mold core is provided with a cavity distributed in a straight line, and the movable seat is provided with an extraction needle passing through the cavity on the side facing the mold core.

[0004] By adopting the above technical solution, the mold core is connected to the upper mold frame by pin clamping, which facilitates the replacement of mold cores of different cavities and has a wide range of applications; the injection molded part forms multiple mounting parts through the cavity, and a connection hole is opened on each mounting part by pulling out the needle. The overall structure is simple and the transmission is stable, thereby improving production efficiency.

[0005] The utility model is further configured such that the top cover is provided with a first inclined hole, and the movable seat is provided with a second inclined hole corresponding to the first inclined hole. When the movable seat abuts against the mold core, the first inclined hole is coaxially distributed in the second inclined hole, and the inclined rod is simultaneously clamped in the first inclined hole and the second inclined hole.

[0006] Furthermore, the upper mold frame and the lower mold frame are respectively provided with a first open groove and a second open groove for accommodating the diagonal rod.

[0007] Furthermore, the top cover is provided with a column and a spring, the upper mold frame is slidably connected to the top cover via the column, and a spring is provided between the upper mold frame and the top cover.

[0008] By adopting the above technical solution, during injection molding, the top cover is close to the upper mold frame. At this time, the spring is compressed, and the positioning of the inclined rod makes the movable seat abut against the mold core, thereby preventing the movable seat from moving due to the high pressure generated by injection molding, thereby maintaining the stability of the structure during injection molding. When the mold is opened, the top cover leaves the upper mold frame through the force of the spring, and the inclined rod controls the movable seat away from the mold core, so that the extraction needle is away from the plastic part 8, so as to facilitate the subsequent demolding of the plastic part 8. The overall structural design is reasonable.

[0009] The utility model is further configured such that the upper mold frame is provided with a rectangular cavity and positioning holes running through both sides, the mold core is provided with connecting holes corresponding to the positioning holes, and the upper mold frame is connected to the mold core through positioning hole pins.

[0010] Furthermore, the upper mold frame is provided with T-shaped slots on both sides of the rectangular cavity, and the movable seat is slidably connected to the upper mold frame through the T-shaped slots.

[0011] By adopting the above technical solution, when the mold core is clamped in the rectangular cavity, the positioning hole and the mounting hole are combined to form a through hole that passes through the upper mold frame. The mold core is clamped to the upper mold frame by a long pin. When the mold core needs to be replaced, the long pin is squeezed out of the upper mold frame to remove the mold core. The mold core replacement method is simple.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. The mold core is connected to the upper mold frame by pin clamping, which is convenient for replacing mold cores of different cavities and has a wide range of applications;

[0014] 2. The injection molded part forms multiple mounting parts through the mold cavity, and a connection hole is opened on each mounting part by pulling out the needle. The overall structure is simple and the transmission is stable, which improves production efficiency.

[0015] The embodiments of the present invention will be further described below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the main view of the utility model;

[0017] Figure 2 This is a structural diagram of the upper mold assembly of the present utility model;

[0018] Figure 3 A three-dimensional diagram of the upper mold frame of the present invention;

[0019] Figure 4 This is a partial enlarged view of the mold core of the present utility model;

[0020] Figure 5 This is a front view of the plastic part of the present utility model;

[0021] Among them: 1 - upper mold assembly, 2 - lower mold frame, 3 - top cover, 4 - upper mold frame, 5 - mold core, 6 - moving seat, 7 - inclined rod, 8 - plastic part, 31 - first inclined hole, 32 - column, 33 - spring, 41 - opening slot, 42 - rectangular cavity, 43 - positioning hole, 44 - T-slot, 51 - cavity, 52 - connecting hole, 61 - extraction needle, 62 - second inclined hole, 81 - mounting part, 82 - shaft hole; DETAILED DESCRIPTION

[0022] like Figure 1 、 2 As shown in Figure 4, this embodiment provides an injection mold with a needle extraction structure, including an upper mold assembly 1 and a lower mold frame 2 corresponding to the upper mold assembly 1. The upper mold assembly 1 includes a top cover 3, an upper mold frame 4, a mold core 5, a movable seat 6 and an inclined rod 7. The top cover 3 is longitudinally slidably connected to the upper mold frame 4, the upper mold frame 4 is detachably connected to the mold core 5, the movable seat 6 is laterally slidably connected to the upper mold frame 4, the top cover 3 is provided with an inclined rod 7 for positioning the movable seat 6, the mold core 5 is provided with four groups of cavities 51 distributed in a straight line, and the movable seat 6 is provided with an extraction needle 61 penetrating the cavity 51 on the side facing the mold core 5.

[0023] In this embodiment, the top cover 3 is provided with a first inclined hole 31, and the movable seat 6 is provided with a second inclined hole 62 corresponding to the first inclined hole 31. When the movable seat 6 abuts against the mold core 5, the first inclined hole 31 is coaxially distributed in the second inclined hole 62, and the inclined rod 7 is simultaneously engaged with the first inclined hole 31 and the second inclined hole 62. The upper mold frame 4 is provided with an open groove 41 for accommodating the inclined rod 7, and the top cover 3 is provided with a column 32 and a spring 33. The upper mold frame 4 is slidably connected to the top cover 3 through the column 32, and a spring 33 is provided between the upper mold frame 4 and the top cover 3.

[0024] Combine Figure 3 As shown, in this embodiment, the upper mold frame 4 is provided with a rectangular cavity 42 and positioning holes 43 passing through both sides, the mold core 5 is provided with connecting holes 52 corresponding to the positioning holes 43, the upper mold frame 4 is pin-connected to the mold core 5 through the positioning holes 43, the upper mold frame 4 is provided with T-slots 44 on both sides of the rectangular cavity 42, and the movable seat 6 is slidably connected to the upper mold frame 4 through the T-slots 44.

[0025] Combine Figure 5 As shown, the working principle of the present invention is that during injection molding, the injection molding machine controls the upper mold frame 4 and the lower mold frame 2 to close. At this time, the top cover 3 is close to the upper mold frame 4. At this time, the spring 33 is compressed, and the positioning of the inclined rod 7 makes the movable seat 6 abut against the mold core 5. The extraction needle 61 is inserted into the cavity 51, and injection molding begins. The cavity 51 forms the mounting portion 81 of the plastic part 8, and the extraction needle 61 forms the rotating shaft hole 82 of the plastic part 8. After the injection molding is finalized, the mold is opened, and the top cover 3 leaves the upper mold frame 4 through the force of the spring 33. The inclined rod 7 controls the movable seat 6 to move outward along the T-slot 44 and away from the mold core 5, so that the extraction needle 61 is away from the cavity 51, so as to facilitate the demolding of the plastic part 8.

[0026] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An injection mold with a needle extraction structure, characterized in that: The invention comprises an upper mold assembly (1) and a lower mold frame (2) corresponding to the upper mold assembly (1); the upper mold assembly (1) comprises a top cover (3), an upper mold frame (4), a mold core (5), a movable seat (6) and an inclined rod (7); the top cover (3) is longitudinally slidably connected to the upper mold frame (4); the upper mold frame (4) is detachably connected to the mold core (5); the movable seat (6) is transversely slidably connected to the upper mold frame (4); the top cover (3) is provided with an inclined rod (7) for positioning the movable seat (6); the mold core (5) is provided with a mold cavity (51) distributed in a straight line; and a draw pin (61) penetrating the mold cavity (51) is provided on the side of the movable seat (6) facing the mold core (5).

2. The injection mold with a needle extraction structure according to claim 1, characterized in that: The top cover (3) is provided with a first inclined hole (31), and the movable seat (6) is provided with a second inclined hole (62) corresponding to the first inclined hole (31). When the movable seat (6) abuts against the mold core (5), the first inclined hole (31) is coaxially distributed with the second inclined hole (62), and the inclined rod (7) is simultaneously engaged with the first inclined hole (31) and the second inclined hole (62).

3. The injection mold with a needle extraction structure according to claim 2, characterized in that: The upper mold frame (4) and the lower mold frame (2) are respectively provided with a first opening groove (41) and a second opening groove (21) for accommodating the oblique rod (7).

4. The injection mold with a needle extraction structure according to claim 3, characterized in that: The top cover (3) is provided with a column (32) and a spring (33); the upper mold frame (4) is slidably connected to the top cover (3) via the column (32); and a spring (33) is provided between the upper mold frame (4) and the top cover (3).

5. The injection mold with a needle extraction structure according to claim 1, characterized in that: The upper mold frame (4) is provided with a rectangular cavity (42) and positioning holes (43) running through both sides; the mold core (5) is provided with connecting holes (52) corresponding to the positioning holes (43); the upper mold frame (4) is connected to the mold core (5) via the positioning holes (43) pins.

6. The injection mold with a needle extraction structure according to claim 5, characterized in that: The upper mold frame (4) is provided with T-shaped slots (44) on both sides of the rectangular cavity (42), and the movable seat (6) is slidably connected to the upper mold frame (4) through the T-shaped slots (44).

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