Ejector pin with long service life for die

Abstract

The utility model relates to the technical field of ejector pins, in particular to a long-service-life ejector pin for a die, which comprises an ejector pin main body, a protecting sleeve is sleeved outside the ejector pin main body and consists of a semicircular protecting sleeve I and a semicircular protecting sleeve II, three arc clamping grooves I are formed in the semicircular protecting sleeve I, and semicircular locking rings are clamped in the arc clamping grooves I; and three second arc clamping grooves are formed in the second semicircular protection sleeve, semicircular locking rings are clamped in the second arc clamping grooves, the three second arc clamping grooves correspond to the three first arc clamping grooves one to one, and the two semicircular locking rings are connected through bolts and nuts. According to the ejector pin, the protective sleeve is sleeved outside the ejector pin main body, when the ejector pin moves in the mounting hole, the protective sleeve is in contact with the inner wall of the mounting hole, the protective sleeve is further abraded, the ejector pin main body cannot be directly abraded, and when the protective sleeve is seriously abraded, only the protective sleeve needs to be replaced, so that the service life of the ejector pin is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of ejector pin technology, and in particular to an ejector pin for molds with a long service life. Background Technology

[0002] Ejector pins, also known as push rods, are important tools in molds used to eject molded plastic parts or die-cast parts. They are installed in the moving mold part of the injection mold. When the mold opens, the ejector plate drives the ejector pins to move, pushing the plastic part or die-cast part out of the mold cavity, thereby achieving demolding.

[0003] The ejector pin rod of the mold ejector pin extends out of the mounting hole and pushes out the molded product. The ejector pin moves back and forth in the mounting hole and rubs against the inner wall of the mounting hole, which causes wear and tear on the ejector pin. Long-term use leads to severe wear on the ejector pin, which greatly shortens the service life of the mold ejector pin. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a mold ejector pin with a long service life.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A mold ejector pin with a long service life includes an ejector pin body, and a protective sleeve is provided on the outer sleeve of the ejector pin body. The protective sleeve is composed of a semi-circular protective sleeve one and a semi-circular protective sleeve two.

[0007] The first semicircular protective sleeve has three arc-shaped slots, and a semicircular locking ring is locked in the first arc-shaped slot. The second semicircular protective sleeve has three arc-shaped slots, and a semicircular locking ring is locked in the second arc-shaped slot. The three arc-shaped slots correspond one-to-one with the three arc-shaped slots. The two semicircular locking rings are connected by bolts and nuts.

[0008] In addition, a preferred structure is that both ends of the ejector pin body are provided with slots.

[0009] In addition, a preferred structure is that both ends of the inner side of the semi-circular protective sleeve are provided with arc-shaped locking blocks, which are locked in the slot.

[0010] In addition, a preferred structure is that both ends of the inner side of the semi-circular protective sleeve are provided with arc-shaped locking blocks, which are locked in one end of the slot.

[0011] In addition, a preferred structure is that magnetic strips are installed on both the upper and lower ends of one side of the semi-circular protective sleeve.

[0012] In addition, a preferred structure is that iron strips are embedded and installed on both the upper and lower ends of one side of the semi-circular protective sleeve, and the iron strips are attracted to the magnetic strips.

[0013] The beneficial effects of this utility model are as follows:

[0014] In this invention, a protective sleeve is installed over the ejector pin body. When the ejector pin moves in the mounting hole, the protective sleeve contacts the inner wall of the mounting hole, thereby wearing down the protective sleeve without directly wearing down the ejector pin body. When the protective sleeve is severely worn, it can be replaced, thus increasing the service life of the ejector pin. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a mold ejector pin with a long service life proposed in this utility model;

[0016] Figure 2 This is an exploded structural diagram of a mold ejector pin with a long service life proposed in this utility model;

[0017] Figure 3 This is a schematic diagram of the main structure of an ejector pin for a mold with a long service life, as proposed in this utility model.

[0018] Figure 4 A schematic diagram of a semi-circular protective sleeve for a mold ejector pin with a long service life proposed in this utility model.

[0019] Figure 5 This is a schematic diagram of the structure of a semi-circular protective sleeve for a mold ejector pin with a long service life proposed in this utility model.

[0020] Figure 6 This is a schematic diagram of a semi-circular locking ring structure for a mold ejector pin with a long service life, as proposed in this utility model.

[0021] In the diagram: 1. Ejector body, 11. Slot, 2. Protective sleeve, 21. Semicircular protective sleeve one, 211. Arc slot one, 212. Arc block one, 22. Semicircular protective sleeve two, 221. Arc slot two, 222. Arc block two, 3. Semicircular locking ring, 4. Bolt, 5. Nut, 6. Magnet strip, 7. Iron strip. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Reference Figure 1-6 A mold ejector pin with a long service life includes an ejector pin body 1, and a protective sleeve 2 is provided on the outer sleeve of the ejector pin body 1. The protective sleeve 2 is composed of a semi-circular protective sleeve 1 21 and a semi-circular protective sleeve 22.

[0024] Among them, the semi-circular protective sleeve 1 21 has three arc-shaped slots 211, and a semi-circular locking ring 3 is locked in the arc-shaped slots 211. The semi-circular protective sleeve 22 has three arc-shaped slots 221, and a semi-circular locking ring 3 is locked in the arc-shaped slots 221. The three arc-shaped slots 221 correspond one-to-one with the three arc-shaped slots 211. The two semi-circular locking rings 3 are connected to the nuts 5 by bolts 4.

[0025] Meanwhile, slots 11 are provided at both ends of the ejector pin body 1.

[0026] Furthermore, both ends of the inner side of the semi-circular protective sleeve 21 are provided with arc-shaped locking blocks 212. The arc-shaped locking blocks 212 are locked in one end of the slot 11 to limit the semi-circular protective sleeve 21 on the ejector body 1, so as to facilitate the installation of the semi-circular protective sleeve 21 onto the ejector body 1.

[0027] Meanwhile, both ends of the inner side of the semi-circular protective sleeve 22 are provided with arc-shaped locking blocks 222. The arc-shaped locking blocks 222 are locked in one end of the slot 11 to limit the semi-circular protective sleeve 222 on the ejector body 1, so as to facilitate the installation of the semi-circular protective sleeve 222 onto the ejector body 1.

[0028] Meanwhile, magnetic strips 6 are installed on both the upper and lower ends of one side of the semi-circular protective sleeve 21.

[0029] Furthermore, iron strips 7 are embedded in the upper and lower ends of one side of the semicircular protective sleeve 22. The iron strips 7 and the magnetic strips 6 attract each other, realizing the initial connection between the semicircular protective sleeve 1 21 and the semicircular protective sleeve 22, which facilitates subsequent installation.

[0030] In this embodiment, the arc-shaped locking blocks 212 at both ends of the inner side of the semicircular protective sleeve 21 are inserted into one end of the slot 11, and then the arc-shaped locking blocks 222 at both ends of the inner side of the semicircular protective sleeve 22 are inserted into the other end of the slot 11. At this time, the magnetic strip 6 will attract the iron strip 7 together, initially connecting the semicircular protective sleeve 21 and the semicircular protective sleeve 22 together. Then, two semicircular locking rings 3 are respectively inserted into the arc-shaped slots 211 and 221. Then, the two semi-circular locking rings 3 are tightly connected together with bolts 4 and nuts 5, so that the inner walls of the semi-circular protective sleeve 1 21 and the semi-circular protective sleeve 22 are tightly fitted with the outer wall of the ejector body 1, thus realizing the installation of protective sleeve 2 on the ejector body 1. When the ejector moves in the mounting hole, the protective sleeve 2 is worn due to friction with the inner wall of the mounting hole, and the ejector body 1 will not be directly worn. When the protective sleeve 2 is worn to a certain extent, it can be replaced, thus extending the service life of the ejector.

[0031] In this invention, a protective sleeve 2 is provided over the ejector body 1. When the ejector moves in the mounting hole, the protective sleeve 2 contacts the inner wall of the mounting hole, thereby wearing down the protective sleeve 2. It will not directly wear down the ejector body 1. When the protective sleeve 2 is severely worn, it can be replaced, thus increasing the service life of the ejector.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A long-life ejector pin for a mold comprising an ejector pin body (1), characterized in that, The thimble body (1) is sleeved with a protective sleeve (2), which is composed of a semicircular protective sleeve one (21) and a semicircular protective sleeve two (22); Three arc clamping grooves one (211) are formed in the semicircular protective sleeve one (21), and a semicircular locking ring (3) is clamped in the arc clamping groove one (211); three arc clamping grooves two (221) are formed in the semicircular protective sleeve two (22), and a semicircular locking ring (3) is clamped in the arc clamping groove two (221); the three arc clamping grooves two (221) correspond to the three arc clamping grooves one (211) one by one, and the two semicircular locking rings (3) are connected by bolts (4) and nuts (5).

2. The long-life ejector pin for a mold according to claim 1, wherein The thimble body (1) is sleeved with a protective sleeve (2), which is composed of a semicircular protective sleeve one (21) and a semicircular protective sleeve two (22); 3. The long-life ejector pin for a mold according to claim 1, wherein The semicircular protective sleeve one (21) is provided with arc clamping blocks one (212) at both ends of the inner side, and the arc clamping blocks one (212) are clamped in one end of the clamping groove (11).

4. The long-life ejector pin for a mold according to claim 1, wherein The semicircular protective sleeve two (22) is provided with arc clamping blocks two (222) at both ends of the inner side, and the arc clamping blocks two (222) are clamped in one end of the clamping groove (11).

5. The long-life ejector pin for a mold according to claim 1, wherein The semicircular protective sleeve one (21) is provided with magnet strips (6) at the upper end and the lower end of one side.

6. The long-life ejector pin for a mold according to claim 1, wherein The semicircular protective sleeve two (22) is embedded with iron strips (7) at the upper end and the lower end of one side, and the iron strips (7) are attracted to the magnet strips (6).

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