Rotary sliding tooth retreating device for injection mold

Abstract

The utility model relates to the technical field of injection mold equipment, in particular to a rotary sliding tooth retreating device of an injection mold, which adopts the technical scheme that the rotary sliding tooth retreating device comprises a first mold core, a second mold core, a third mold core and a fourth mold core, the first mold core is provided with a through hole penetrating through the upper and lower ends of the first mold core along the central axis. The first mold core is fixedly arranged in the mold, the movable second mold core is arranged in the center of the first mold core, the second mold core is connected with the rotatable rotating shaft driven by the motor, and the second mold core is driven by the rotating shaft to rotate, so that the external thread at the front end of the second mold core rotates and slides to be gradually separated from the inner wall of an injection molding part; and rapid, efficient and lossless demolding is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of injection mold equipment, in particular to a rotating sliding tooth-removing device for an injection mold. Background Art

[0002] In the injection molding process, the demoulding procedure of the injection molded parts after injection molding is a key link. When demoulding the injection molded parts, the traditional injection mold usually ejects the product out of the mold through the ejector mechanism. However, when the injection molded parts have an internal thread structure, due to the spiral structure of the internal thread, the ejection demoulding will cause the internal thread of the injection molded parts to be damaged, resulting in defective products. Therefore, how to achieve fast, efficient and non-destructive demoulding for injection molded parts with internal threads is an important research direction of current injection mold technology.

[0003] In view of this, we propose an injection mold rotary sliding tooth removal device to solve the existing problems. Utility Model Content

[0004] The utility model aims to provide a rotary sliding tooth removal device for an injection mold to solve the problems raised in the above background technology.

[0005] To achieve the above purpose, the utility model provides the following technical solution: a rotating and sliding tooth-removing device for an injection mold, comprising:

[0006] The first mold core is fixed in the mold, and a support is provided on one side of the top thereof, through which the bottom surface of the injection molded part is formed, and the first mold core is provided with a through hole penetrating the upper and lower ends of the first mold core along the central axis;

[0007] The second mold core includes a rod body, a front end of the rod body is provided with an external thread, a rear end of the rod body is movably connected to the through hole of the first mold core, the rod body of the second mold core can be movably inserted into the through hole of the first mold core, and the external thread end of the front end of the rod body protrudes from one side of the top end of the support member of the first mold core, so that the internal thread of the injection molded part is formed during injection molding;

[0008] The rotating shaft has a second connecting piece at one end for clamping with the first connecting piece of the second mold core, and the other end is connected to the motor to drive the second mold core to rotate, and the external thread is driven by the rod body to rotate and disengage from the injection molded part, which is used for demolding the injection molded part with internal thread formed in the mold.

[0009] Preferably, the end wall of the first connecting member of the second mold core close to the rod body can be movably abutted against the bottom end surface of the first mold core.

[0010] Preferably, a rectangular snap-in groove is provided at one end of the bottom of the first connecting member, and the second connecting member is a rectangular tenon matching the shape of the snap-in groove, and the rotating shaft is plug-in-connected to the snap-in groove through the second connecting member.

[0011] Preferably, the snap-fit ​​groove and the tenon are interference fit.

[0012] Preferably, a key groove which is deepened radially along the shaft body is provided on the outer peripheral wall of one end of the shaft away from the second connecting member, and the shaft is rotatably connected to the motor through the key groove.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model fixes the first mold core in the mold, a movable second mold core is provided at the center of the first mold core, the second mold core is connected to a rotatable shaft driven by a motor, and the second mold core rotates driven by the shaft, so that the external thread at the front end of the second mold core rotates and slides gradually out of the inner wall of the injection molded part, thereby achieving fast, efficient and lossless demolding. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional explosion structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the three-dimensional cutaway structure of the utility model.

[0016] In the figure: 1, injection molded part; 2, first mold core; 201, through hole; 202, support member; 3, second mold core; 301, rod body; 302, first connecting member; 303, external thread; 304, snap-in groove; 4, rotating shaft; 401, second connecting member; 402, keyway. DETAILED DESCRIPTION

[0017] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0018] Embodiment 1

[0019] like Figure 1 and Figure 2 As shown, the utility model provides a rotary sliding tooth removal device for an injection mold, comprising:

[0020] The first mold core 2 is fixed in the mold, and a support member 202 is provided on one side of the top thereof, through which the bottom surface of the injection molded part 1 is formed, and a through hole 201 penetrating the upper and lower ends of the first mold core 2 is provided along the central axis;

[0021] The second mold core 3 includes a rod body 301, a front end of the rod body 301 is provided with an external thread 303, a rear end of the rod body 301 is movably connected to the through hole 201 of the first mold core, the rod body 301 of the second mold core 3 can be movably inserted into the through hole 201 of the first mold core 2, and the end of the external thread 303 at the front end of the rod body 301 protrudes from one side of the top end of the support member 202 of the first mold core 2, so that the internal thread of the injection molded part 1 is formed during injection molding;

[0022] The rotating shaft 4 has a second connecting piece 401 at one end for clamping with the first connecting piece 302 of the second mold core 3, and the other end is connected to the motor to drive the second mold core 3 to rotate, and drives the external thread 303 to rotate out of the injection molded part 1 through the rod body 301, so as to demold the injection molded part 1 with internal thread formed in the mold.

[0023] In the embodiment, the end wall of the first connecting member 302 of the second mold core 3 close to the rod body 301 can be movably abutted against the bottom end surface of the first mold core 2 to limit the position of the second mold core 3 .

[0024] In the embodiment, a rectangular snap-in groove 304 is provided at one end of the bottom of the first connecting member 302 , and the second connecting member 401 is a rectangular tenon matching the shape of the snap-in groove 304 , and the rotating shaft 4 is plug-in-connected to the snap-in groove 304 through the second connecting member 401 .

[0025] In the embodiment, the engaging groove 304 is interference fit with the tenon, and is used to drive the second mold core 3 to move via the rotating shaft 4 .

[0026] In the embodiment, a key groove 402 is provided on the outer peripheral wall of one end of the rotating shaft 4 away from the second connecting member 401, and the rotating shaft 4 is rotatably connected to a motor through the key groove 402. The rotating shaft 4 is driven to rotate by the motor, and the second mold core 3 is rotated via the rotating shaft 4.

[0027] The working principle of a rotating and sliding tooth-removing device for an injection mold based on Example 1 is as follows: after the injection molding of the injection molded part 1, the upper and lower ends of the mold are separated along the mold line for demolding, and the rotating shaft 4 is driven by a motor to rotate. The rotating shaft 4 is engaged with the clamping groove 304 through the second connecting member 401, thereby driving the second mold core 3 to rotate. The first mold core 2 prevents the injection molded part 1 from rotating by the support member 202 at its front end. When the two ends of the mold are separated, the interference fit between the tenon and the clamping groove 304 allows one end of the mold to drive the second mold core 3 to gradually rotate and retreat along the through hole 201 of the first mold core 2 through the rotating shaft 4, so that the external thread 303 of the second mold core 3 gradually disengages from the injection molded part 1, thereby completely demolding the injection molded part 1.

[0028] The above-mentioned specific embodiments are only several preferred embodiments of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

Claims

1. A rotary sliding tooth removal device for an injection mold, characterized in that: include: A first mold core (2) is fixed in the mold, and a support member (202) is provided on one side of the top end thereof, and the bottom surface of the injection molded part (1) is molded by the support member (202). The first mold core (2) is provided with a through hole (201) penetrating the upper and lower ends of the first mold core (2) along the central axis; The second mold core (3) comprises a rod body (301), the front end of the rod body (301) is provided with an external thread (303), the rear end of the rod body (301) is movably connected to the through hole (201) of the first mold core, the rod body (301) of the second mold core (3) can be movably inserted into the through hole (201) of the first mold core (2), and the end of the external thread (303) at the front end of the rod body (301) protrudes from one side of the top end of the support member (202) of the first mold core (2), so that the internal thread of the injection molded part (1) is formed during injection molding; The rotating shaft (4) has a second connecting piece (401) at one end thereof for clamping with the first connecting piece (302) of the second mold core (3), and the other end thereof is connected to a motor to drive the second mold core (3) to rotate, and drives the external thread (303) to rotate out of the injection molded part (1) through the rod body (301), so as to be used for demoulding the injection molded part (1) with the internal thread formed in the mold.

2. The rotary sliding tooth removal device for injection mold according to claim 1, characterized in that: The end wall of the first connecting member (302) of the second mold core (3) close to the rod body (301) can be movably abutted against the bottom end surface of the first mold core (2).

3. The rotary sliding tooth removal device for injection mold according to claim 2, characterized in that: A rectangular snap-in groove (304) is provided at one end of the bottom of the first connecting member (302); the second connecting member (401) is a rectangular tenon matching the shape of the snap-in groove (304); and the rotating shaft (4) is pluggably connected to the snap-in groove (304) via the second connecting member (401).

4. The rotary sliding tooth removal device for injection mold according to claim 3, characterized in that: The clamping groove (304) is interference-fitted with the clamping tenon.

5. The rotary sliding tooth removal device for injection mold according to claim 1, characterized in that: A key groove (402) which is radially deepened along the body of the rotating shaft (4) is provided on the outer peripheral wall of one end of the rotating shaft (4) away from the second connecting member (401), and the rotating shaft (4) is rotatably connected to the motor via the key groove (402).

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