Sectional ejector sleeve structure of large-scale die

Abstract

The utility model provides a large-scale mould sectional ejector sleeve structure which comprises an end head and an ejector sleeve needle, one side of the end head is fixedly connected with the ejector sleeve needle, the end head is provided with a plurality of counterbores, and the ejector sleeve needle is formed by connecting a plurality of needle sections. The ejector sleeve assembly has the advantages that when a certain section of ejector sleeve needle is abraded or damaged, only the section needs to be replaced, and the whole ejector sleeve assembly does not need to be replaced. According to the design mode, the replacement and maintenance processes are greatly simplified, and the maintenance cost and time are reduced. The sectional ejector sleeve pin allows a designer to divide the ejector sleeve pin into a plurality of independent sections for design according to the specific requirements of products and the structural characteristics of a mold. According to the design mode, the degree of freedom of the design is improved, so that the ejector sleeve can better adapt to complex mold structures and diversified product requirements; according to the sectional ejector sleeve pin, a large-volume integral structure is simplified into a plurality of simple independent sections, so that the manufacturing difficulty is reduced, and the machining precision and efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mold accessories, in particular to a segmented ejector sleeve structure for large-scale molds. Background Technique

[0002] The ejector sleeve is a commonly used demolding structure on plastic molds. The mold usually includes a lower template, a lower mold core, and an ejector plate. An ejector sleeve penetrating the lower template and the lower mold core is provided on the ejector plate. For large-scale mold structures, generally, a large-size and large-volume ejector sleeve structure needs to be designed.

[0003] In the prior art, the ejector sleeve structure is generally integrated. After long-term use, when a certain part of the ejector sleeve is damaged, the entire ejector sleeve component structure needs to be replaced, resulting in high costs. Therefore, a segmented ejector sleeve structure for large-scale molds is proposed to solve the above problems. Content of the Utility Model

[0004] The purpose of the utility model aims to solve at least one of the technical defects.

[0005] For this reason, an object of the utility model is to propose a segmented ejector sleeve structure for large-scale molds to solve the problems mentioned in the background technique and overcome the deficiencies existing in the prior art.

[0006] To achieve the above object, an embodiment of one aspect of the utility model provides a segmented ejector sleeve structure for large-scale molds, including a head and an ejector sleeve pin. One side of the head is fixedly connected with the ejector sleeve pin, and a plurality of countersunk holes are provided on the head;

[0007] The ejector sleeve pin is formed by connecting a plurality of needle segments. A joint is fixedly connected to the end of the needle segment, and a plurality of screw holes are provided at the edge of the joint;

[0008] A sleeve joint is sleeved on the connection part of the joint. A plurality of installation points are fixedly connected to the outer surface of the sleeve joint. A connecting piece is inserted at the installation point, and the connecting piece is threadedly connected with the screw hole;

[0009] The end of the connecting piece is tightened on the surface of the installation point;

[0010] A sleeve is movably connected to the outer surface of the ejector sleeve pin.

[0011] Preferably, from any of the above solutions, the countersunk holes penetrate the head, and the countersunk holes are circumferentially arranged in an array about the axis of the head.

[0012] Adopting the above technical solution: The ejector sleeve structure of this mold is composed of two parts. One is the ejector sleeve part, which is composed of a head and a multi-segmented ejector sleeve pin. The other is the sleeve part, and the sleeve is movably connected to the outer surface of the ejector sleeve pin.

[0013] Preferably, according to any of the above solutions, the diameter of the joint is smaller than that of the needle section, and the materials of the needle section and the joint are alloy steel.

[0014] Preferably, according to any of the above solutions, the screw holes are circumferentially arrayed about the axis of the joint, and the material of the ferrule is stainless steel.

[0015] Adopting the above technical solution: The ejector sleeve mainly consists of a sleeve and an ejector pin. The sleeve is usually installed on the ejector plate, while the ejector pin is installed on the bottom plate through the end. During the injection molding process, the molten plastic is injected into the mold cavity and solidifies after cooling.

[0016] When the mold is opened, the ejection system of the injection molding machine starts to work, pushing the ejector plate upward.

[0017] Since the sleeve is fixed to the ejector plate, the sleeve also moves upward accordingly. However, the ejector pin remains stationary as it is fixed to the mold bottom plate or the moving mold fixing plate.

[0018] The upward movement of the sleeve causes the plastic part (i.e., a part of the plastic product) wrapped around the ejector pin to be ejected from the mold, thus realizing the demolding of the product. When the sleeve ejects, due to the structural characteristics of the sleeve (hollow in the middle with an ejector pin inside), the ejection force is large and uniform. This is particularly applicable when there are circular through holes or blind holes on the product and the plastic part needs to be ejected.

[0019] Preferably, according to any of the above solutions, the surface of the installation point is a plane, and the connecting piece is specifically an internal hexagonal bolt.

[0020] The core structure of this device is: ejector pin, countersunk hole, needle section, joint, screw hole, ferrule, installation point, connecting piece. The structure of the ejector pin is improved and designed to be segmented, composed of several needle sections connected together. At the end of the needle section, there is a joint. After slipping a ferrule between the joints, at the installation point, a connecting piece is installed and the end of the connecting piece is tightened. The connecting piece is threadedly connected to the corresponding screw hole. Such a structural design enables, when a certain section of the ejector pin is worn or damaged, only that section needs to be replaced, without replacing the entire ejector sleeve assembly. This design method greatly simplifies the replacement and maintenance process, reducing the maintenance cost and time. The segmented ejector pin allows the designer to divide the ejector pin into multiple independent sections according to the specific requirements of the product and the structural characteristics of the mold. This design method improves the design freedom, enabling the ejector sleeve to better adapt to complex mold structures and diverse product requirements.

[0021] The segmented ejector pin simplifies the large-volume integral structure into multiple simple independent sections, reducing the manufacturing difficulty and improving the machining accuracy and efficiency.

[0022] Preferably, in any of the above solutions, the connecting member, the mounting point, and the ferrule do not protrude from the surface of the needle section.

[0023] Compared with the prior art, the advantages and beneficial effects of the present utility model are as follows:

[0024] 1. In the large-scale die segmented ejector sleeve structure, through the cooperation of the ejector sleeve needle, counterbore, needle section, joint, screw hole, ferrule, mounting point, and connecting member, the structure of the ejector sleeve needle is improved and designed to be segmented, that is, composed of several connected needle sections. The end of the needle section has a joint. After slipping a ferrule between the joints, at the mounting point, the upper connecting member is installed and the end of the connecting member is tightened. The connecting member is threadedly connected to the corresponding screw hole. Such a structural design enables, when a certain section of the ejector sleeve needle is worn or damaged, only that section needs to be replaced without replacing the entire ejector sleeve assembly. This design method greatly simplifies the replacement and maintenance process, reducing the maintenance cost and time. The segmented ejector sleeve needle allows the designer to divide the ejector sleeve needle into multiple independent sections according to the specific requirements of the product and the structural characteristics of the die. This design method improves the degree of freedom in design, enabling the ejector sleeve to better adapt to complex die structures and diverse product requirements.

[0025] 2. In the large-scale die segmented ejector sleeve structure, the segmented ejector sleeve needle simplifies the large-volume integral structure into multiple simple independent sections, reducing the manufacturing difficulty and improving the machining accuracy and efficiency.

[0026] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0028] Figure 1 is a schematic structural diagram of the present utility model;

[0029] Figure 2 is a schematic structural diagram of the joint of the present utility model;

[0030] Figure 3 is a schematic structural diagram of the ferrule of the present utility model;

[0031] Figure 4 is the present utility model Figure 3 an enlarged schematic structural diagram of part A in

[0032] In the figure: 1 - end head, 2 - ejector sleeve needle, 3 - counterbore, 4 - needle section, 5 - joint, 6 - screw hole, 7 - ferrule, 8 - mounting point, 9 - connecting member, 10 - sleeve. Detailed implementation mode

[0033] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present utility model, but should not be construed as a limitation to the present utility model.

[0034] In the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0035] As Figures 1-4 shown, the large-scale die segmented ejector sleeve structure of the present utility model includes an end head 1 and an ejector sleeve pin 2. One side of the end head 1 is fixedly connected with the ejector sleeve pin 2, and a plurality of countersunk holes 3 are opened on the end head 1;

[0036] The ejector sleeve pin 2 is connected by a plurality of needle segments 4. The end of the needle segment 4 is fixedly connected with a joint 5, and a plurality of screw holes 6 are opened at the edge of the joint 5;

[0037] A sleeve section 7 is sleeved on the connection part of the joint 5. A plurality of installation points 8 are fixedly connected to the outer surface of the sleeve section 7. A connecting piece 9 is inserted at the installation point 8, and the connecting piece 9 is threadedly connected with the screw hole 6;

[0038] The end of the connecting piece 9 is tightened on the surface of the installation point 8;

[0039] The outer surface of the ejector sleeve pin 2 is movably connected with a sleeve 10.

[0040] Embodiment 1: The countersunk hole 3 penetrates through the end head 1, and the countersunk holes 3 are circumferentially arrayed about the axis of the end head 1. The ejector sleeve structure of this die is composed of two parts. One is the ejector sleeve part, which is composed of the end head 1 and the multi-segmented ejector sleeve pin 2. The other is the sleeve 10 part, and the sleeve 10 is movably connected to the outer surface of the ejector sleeve pin 2. The diameter of the joint 5 is smaller than the diameter of the needle segment 4. The materials of the needle segment 4 and the joint 5 are alloy steel. The screw holes 6 are circumferentially arrayed about the axis of the joint 5, and the material of the sleeve section 7 is stainless steel. The surface of the installation point 8 is a plane, and the connecting piece 9 is specifically an internal hexagonal bolt.

[0041] Embodiment 2: The structure of the ejector pin 2 is improved and designed to be segmented, composed of several pin segments 4 connected together. The end of the pin segment 4 has a joint 5. After a sleeve joint 7 is sleeved between the joints 5, at the installation point 8, an upper connecting piece 9 is used to tighten the end of the connecting piece 9, and the connecting piece 9 is threadedly connected to the corresponding screw hole 6. Such a structural design enables that when a certain segment of the ejector pin 2 is worn or damaged, only this segment needs to be replaced, without replacing the entire ejector assembly. The connecting piece 9, the installation point 8, and the sleeve joint 7 do not protrude from the surface of the pin segment 4.

[0042] The working principle of the present utility model is as follows:

[0043] The ejector mainly consists of two parts, a sleeve 10 and an ejector pin 2. The sleeve 10 is usually installed on the ejector plate, and the ejector pin 2 is installed on the bottom plate through the end 1. During the injection molding process, the molten plastic is injected into the mold cavity and solidifies after cooling.

[0044] When the mold is opened, the ejection system of the injection molding machine starts to work, pushing the ejector plate upward.

[0045] Since the sleeve 10 is fixed to the ejector plate, the sleeve 10 also moves upward accordingly. However, the ejector pin 2 remains stationary because it is fixed to the mold bottom plate or the moving mold fixing plate.

[0046] The upward movement of the sleeve 10 causes the plastic part (i.e., a part of the plastic product) wrapped around the ejector pin 2 to be ejected from the mold, thus realizing the demolding of the product. When the sleeve 10 ejects, due to the structural characteristics of the sleeve 10 (hollow in the middle with an ejector pin inside), the ejection force is large and uniform. This is particularly applicable to the case where there are circular through holes or blind holes on the product and the plastic part needs to be ejected.

[0047] Compared with the prior art, the present utility model has the following beneficial effects compared with the prior art:

[0048] 1. The large-scale die segmented ejector sleeve structure improves the ejector pin 2 structure through the cooperative setting of the ejector pin 2, countersunk hole 3, pin segment 4, joint 5, screw hole 6, sleeve section 7, installation point 8, and connecting piece 9. It is designed to be segmented, consisting of several connected pin segments 4. The end of the pin segment 4 has a joint 5. After slipping a sleeve section 7 between the joints 5, at the installation point 8, the upper connecting piece 9 is installed and the end of the connecting piece 9 is tightened. The connecting piece 9 is threadedly connected to the corresponding screw hole 6. Such a structural design enables only the worn or damaged segment of the ejector pin 2 to be replaced when a certain segment is worn or damaged, without replacing the entire ejector sleeve assembly. This design method greatly simplifies the replacement and maintenance process, reducing the maintenance cost and time. The segmented ejector pin 2 allows designers to divide the ejector pin 2 into multiple independent segments according to the specific requirements of the product and the structural characteristics of the die. This design method improves the design freedom, enabling the ejector sleeve to better adapt to complex die structures and diverse product requirements.

[0049] 2. For the large-scale die segmented ejector sleeve structure, the segmented ejector pin 2 simplifies the large-volume integral structure into multiple simple independent segments, reducing the manufacturing difficulty and improving the machining accuracy and efficiency.

Claims

1. Large-scale mold segmented sleeve structure, characterized in that: It comprises an end head (1) and a sleeve needle (2), wherein one side of the end head (1) is fixedly connected to the sleeve needle (2), and the end head (1) is provided with a plurality of countersunk holes (3); The sleeve needle (2) is formed by connecting a plurality of needle segments (4), the end of the needle segment (4) is fixedly connected to a joint (5), and a plurality of screw holes (6) are provided at the edge of the joint (5); A sleeve (7) is sleeved on the connection of the joint (5); a plurality of mounting points (8) are fixedly connected to the outer surface of the sleeve (7); a connecting piece (9) is plugged into the mounting point (8); the connecting piece (9) is threadedly connected to the screw hole (6); the end of the connecting piece (9) is screwed onto the surface of the mounting point (8); The outer surface of the sleeve needle (2) is movably connected with a sleeve (10).

2. The large-scale mold segmented sleeve structure according to claim 1, characterized in that: The countersunk holes (3) penetrate the end head (1), and the countersunk holes (3) are arranged in a circular array about the axis of the end head (1).

3. The large-scale mold segmented sleeve structure according to claim 2, characterized in that: The diameter of the joint (5) is smaller than the diameter of the needle segment (4), and the needle segment (4) and the joint (5) are made of alloy steel.

4. The large-scale mold segmented sleeve structure according to claim 3, characterized in that: The screw holes (6) are arranged in a circular array about the axis of the joint (5), and the sleeve (7) is made of stainless steel.

5. The large-scale mold segmented sleeve structure according to claim 4, characterized in that: The surface of the mounting point (8) is a plane, and the connecting member (9) is specifically a hexagon socket bolt.

6. The large-scale mold segmented sleeve structure according to claim 5, characterized in that: The connecting piece (9), the mounting point (8) and the sleeve (7) do not protrude from the surface of the needle segment (4).

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