Injection mold with anti-damage submerged round ejector pin structure

Abstract

The utility model relates to an injection mold with an anti-damage submerged round ejector pin structure, which comprises a movable mold, a mold core arranged on the lower side of the movable mold, a fixed mold mounted on the lower side wall of the mold core, a plurality of insertion columns fixedly connected to the lower side wall of the movable mold, a pouring component mounted on the upper side wall of the mold core and comprising a pouring pipe, according to the device, through cooperation of the groove and the conical hole in the mold body, when a plastic product is jacked up, automatic separation of the product and the pouring gate can be achieved, through cooperation of the adjusting assembly and the ejector pin assembly, the product can be automatically separated from the pouring gate, and the product can be automatically separated from the pouring gate through cooperation of the adjusting assembly and the ejector pin assembly. When the ejector pin assembly does not act for a long time after ejecting a plastic product, the ejector pin assembly is automatically heated, pouring materials are effectively prevented from being solidified, then the forming condition of powder in a pouring gate is lowered, meanwhile, subsequent workers can conveniently clean part of the pouring materials remaining in the ejector pin assembly, and damage to the surface of the ejector pin assembly is reduced.

Description

Technical Field

[0001] The utility model relates to a submerged dome ejector pin structure, in particular to an injection mold with an anti-damage submerged dome ejector pin structure applied in the technical field of plastic product processing molds. Background Art

[0002] Submerged glue is a process where the flow channel is near the edge of the product. An oblique hole is drilled on the mold at an angle of about 45 degrees, extending to the ejector pin or the rib of the product as the glue entry point. The advantage is that the glue entry point cannot be seen on the surface of the product. The difference between side-injection glue and submerged glue: Submerged glue is what we usually call a submerged port, and side-injection glue is commonly known as a large water port, also known as a bell mouth, etc. The difference is that submerged glue generally does not require further processing, while the large water port needs to be manually separated from the product. There are three-plate molds and two-plate molds for submerged glue, and the large water port is generally just a two-plate simple mold. When submerged glue is needed, the existing ones generally use a submerged dome ejector pin structure to lift the product and automatically cut off the product through the mold core between the gate and the product to achieve automatic detachment of the product.

[0003] However, the long-term dragging between the gate and the mold makes it easy for casting powder to form inside the gate, resulting in powder or defects on the surface of the product during the second injection molding. In addition, after injection molding, some casting will remain on the ejector pin. Once solidified, it is not only difficult to clean, but also causes damage to the ejector pin.

[0004] To this end, the applicant proposes an injection mold with an anti-damage latent dome ejector pin structure. Utility Model Content

[0005] 1. Technical issues to be solved

[0006] In view of the problems existing in the prior art, the purpose of the utility model is to provide a device, which can realize the automatic separation of the product and the gate when the plastic product is lifted up through the cooperation of the groove and the tapered hole in the mold body, and can also automatically heat itself when the ejector assembly does not move for a long time after lifting the plastic product through the cooperation of the adjustment component and the ejector assembly, so as to effectively avoid the solidification of the casting, thereby reducing the conditions for the formation of powder inside the gate, and at the same time, it is convenient for subsequent staff to clean up part of the casting retained by the ejector assembly, thereby reducing damage to the surface of the ejector assembly.

[0007] 2. Technical solution

[0008] To solve the above problems, the utility model adopts the following technical solutions.

[0009] An injection mold with an anti-damage latent dome ejector pin structure comprises a movable mold, a mold core is arranged on the lower side of the movable mold, a fixed mold is installed on the lower side wall of the mold core, a plurality of plug posts are fixedly connected to the lower side wall of the movable mold, the plurality of plug posts penetrate the mold core and are fixedly connected to the fixed mold, a pouring assembly is installed on the upper side wall of the mold core, the pouring assembly comprises a pouring pipe, a branch pipe is connected to the pouring pipe, a gate is connected to one end of the branch pipe away from the pouring pipe, a feed pipe is connected to the lower end of the pouring pipe, a driving rod is fixedly connected to the lower end of the pouring pipe, and the driving rod penetrates the mold core and is fixedly connected to the fixed mold, and an ejector pin assembly is arranged on one side of the pouring assembly.

[0010] Furthermore, the mold core includes a mold body, a plastic product is installed on the mold body, a mold body matching the pouring tube is drilled on the mold body, a through hole and a tapered hole matching the ejector assembly are drilled on the mold body, and the through hole is connected to the groove through the tapered hole.

[0011] Furthermore, an adjustment component is fixedly connected to the lower side wall of the mold body, and the adjustment component includes two fixing frames fixedly connected to the mold body. A same magnetic sleeve is fixedly connected between the two fixing frames, and the magnetic sleeve is sleeved on the ejector pin assembly.

[0012] Furthermore, the ejector pin assembly comprises a submerged ejector pin plugged into the mold body, a notch is cut on the submerged ejector pin, a heating element is installed inside the submerged ejector pin, and an electric heating plate is installed on the upper end of the heating element.

[0013] Furthermore, a movable magnetic plug which is magnetically attracted to the magnetic sleeve is slidably connected inside the submersible ejector pin, and a connecting spring is fixedly connected between the movable magnetic plug and the heating element.

[0014] Furthermore, a switch button electrically connected to the heating element is installed on the lower inner wall of the submerged ejector pin, and two groups of exhaust holes are drilled on the submerged ejector pin, which are respectively located on the upper and lower sides of the movable magnetic plug, and the diameter of the upper exhaust hole is larger than the diameter of the lower exhaust hole.

[0015] Furthermore, a one-way valve located at the lower side of the movable magnetic plug is installed on the submersible ejector pin.

[0016] 3. Beneficial effects

[0017] Compared with the prior art, the advantages of the present invention are:

[0018] (1) This solution can achieve automatic separation of the product from the gate when the plastic product is lifted up through the cooperation of the groove and the tapered hole in the mold body.

[0019] (2) This solution can automatically heat itself when the ejector assembly does not move for a long time after lifting the plastic product by adjusting the coordination between the assembly and the ejector assembly, thereby effectively preventing the solidification of the casting and reducing the conditions for the formation of powder inside the gate. It also makes it easier for subsequent staff to clean up the part of the casting left by the ejector assembly, thereby reducing damage to the surface of the ejector assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A three-dimensional image of this application;

[0021] Figure 2 This is an exploded view of this application;

[0022] Figure 3 This is a schematic diagram of the structure of the casting component part of this application;

[0023] Figure 4 This is a schematic diagram of the structure of the mold core part of this application;

[0024] Figure 5 This is a schematic diagram of the structure of the ejector pin part of this application;

[0025] Figure 6 for Figure 5 Schematic diagram of the structure at A in the middle.

[0026] Description of the numbers in the figure:

[0027] 1. Moving mold; 2. Mold core; 201. Mold body; 202. Groove; 203. Conical hole; 3. Fixed mold; 4. Plug column; 5. Casting assembly; 501. Casting pipe; 502. Branch pipe; 503. Gate; 504. Drive rod; 505. Feed pipe; 6. Plastic product; 7. Ejector assembly; 701. Submerged ejector; 702. Notch; 703. Heating element; 704. Heater; 705. Moving magnetic plug; 706. Connecting spring; 707. Switch button; 708. One-way valve; 709. Exhaust hole; 8. Adjustment assembly; 801. Fixing bracket; 802. Magnetic sleeve. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0029] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] Example 1

[0032] See also Figure 1-3 , an injection mold with an anti-damage latent dome ejector structure, comprising a movable mold 1, a mold core 2 is arranged on the lower side of the movable mold 1, a fixed mold 3 is installed on the lower side wall of the mold core 2, the structure and principle of the fixed mold 3 are all existing technologies, and are not repeated here. A plurality of plug posts 4 are fixedly connected to the lower side wall of the movable mold 1, and the plurality of plug posts 4 penetrate the mold core 2 and are fixedly connected to the fixed mold 3. A pouring component 5 is installed on the upper side wall of the mold core 2, and the pouring component 5 comprises a pouring pipe 501, and a branch pipe 502 is connected to the pouring pipe 501, and a gate 503 is connected to the end of the branch pipe 502 away from the pouring pipe 501, and a feed pipe 505 is connected to the lower end of the pouring pipe 501, and a driving rod 504 is fixedly connected to the lower end of the pouring pipe 501, and the driving rod 504 penetrates the mold core 2 and is fixedly connected to the fixed mold 3, and the fixed mold 3 drives the pouring component 5 to move up and down through the driving rod 504, and a ejector component 7 is arranged on one side of the pouring component 5.

[0033] The mold core 2 includes a mold body 201, on which a plastic product 6 is installed. The mold body 201 is provided with a mold body 201 matching with a pouring tube 501. The mold body 201 is provided with a through hole and a tapered hole 203 matching with an ejector assembly 7, and the through hole is connected with the groove 202 through the tapered hole 203. The gate 503 can be cut during the up and down movement of the pouring assembly 5, thereby automatically separating the gate 503 from the product.

[0034] An adjustment component 8 is fixedly connected to the lower side wall of the mold body 201, and the adjustment component 8 includes two fixing frames 801 fixedly connected to the mold body 201. The same magnetic sleeve 802 is fixedly connected between the two fixing frames 801, and the magnetic sleeve 802 is sleeved on the ejector assembly 7, which can adjust the ejector assembly 7 according to the up and down movement of the casting assembly 5.

[0035] Example 2

[0036] The utility model provides an injection mold with an anti-damage dome ejector pin structure, wherein the components identical or corresponding to those in Example 1 are marked with the corresponding reference numerals in Example 1. For the sake of simplicity, only the differences from Example 1 are described below. Figure 4-6 The ejector assembly 7 includes a submerged ejector 701 plugged into the mold body 201, a notch 702 is cut on the submerged ejector 701, a heating element 703 is installed inside the submerged ejector 701, and an electric heater 704 is installed on the upper end of the heating element 703 to heat and prevent the castable from solidifying.

[0037] A mobile magnetic plug 705 that is magnetically attracted to the magnetic sleeve 802 is slidably connected inside the submerged ejector pin 701, and a connecting spring 706 is fixedly connected between the mobile magnetic plug 705 and the heating element 703. Under normal circumstances, the magnetic sleeve 802 is located on one side of the mobile magnetic plug 705, and the mobile magnetic plug 705 cannot be moved downward by the magnetic attraction of the magnetic sleeve 802. At this time, the connecting spring 706 is also in a compressed state. A switch button 707 electrically connected to the heating element 703 is installed on the lower inner wall of the submerged ejector pin 701. Two groups of exhaust holes 709 are respectively located on the upper and lower sides of the mobile magnetic plug 705, and the diameter of the exhaust hole 709 on the upper side is larger than that of the exhaust hole 709 on the lower side. A one-way valve 708 located on the lower side of the mobile magnetic plug 705 is installed on the submerged ejector pin 701, which can automatically start the heating element 703 by adjusting the movement of the component 8, thereby saving energy consumption and facilitating the cooling and solidification of the product.

[0038] Working principle: During injection molding, the pouring material is injected into the notch 702 of the ejector assembly 7 through the gate 503, so that the pouring material can only move upward along the notch 702 and flow into the mold cavity. At this time, the fixed mold 3 drives the pouring material assembly 5 and the formed product to move upward through the gate 503 and the ejector assembly 7. At this time, the lower end of the submerged ejector 701 moves to the side of the magnetic sleeve 802. Since the diameter of the exhaust hole 709 on the upper side is larger than the diameter of the exhaust hole 709 on the lower side, when the mobile magnetic plug 705 moves downward, the air under the submerged ejector 701 needs to be continuously removed from the lower side. The air is discharged from the exhaust hole 709 on the side, so the rapid movement of the submerged ejector pin 701 does not drive the movable magnetic plug 705 to move downward rapidly. At this time, the magnetic force between the magnetic sleeve 802 and the movable magnetic plug 705 is quickly separated, and then the movable magnetic plug 705 slowly moves downward under the elastic force of the connecting spring 706 until the switch button 707 is pressed, thereby realizing the delayed start of the heating element 703, thereby achieving energy saving. After the heating element 703 is started, it can heat the electric heater 704, thereby preventing the castable on the ejector pin assembly 7 from solidifying;

[0039] When the fixed mold 3 drives the ejector assembly 7 and the pouring assembly 5 to move downward, the movable magnetic plug 705 is again moved upward by the magnetic force of the magnetic sleeve 802. At this time, the one-way valve 708 is opened by the air pressure, so that the movable magnetic plug 705 is quickly magnetically attracted by the magnetic sleeve 802 and reset.

[0040] The above are only preferred specific implementations of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. An injection mold with an anti-damage dome ejector pin structure, comprising a movable mold (1), characterized in that: A mold core (2) is arranged at the lower side of the movable mold (1), a fixed mold (3) is installed on the lower side wall of the mold core (2), a plurality of plug posts (4) are fixedly connected to the lower side wall of the movable mold (1), the plurality of plug posts (4) penetrate the mold core (2) and are fixedly connected to the fixed mold (3), a casting assembly (5) is installed on the upper side wall of the mold core (2), the casting assembly (5) comprises a casting pipe (501), a branch pipe (502) is connected to the casting pipe (501), a gate (503) is connected to one end of the branch pipe (502) away from the casting pipe (501), a feed pipe (505) is connected to the lower end of the casting pipe (501), a driving rod (504) is fixedly connected to the lower end of the casting pipe (501), and the driving rod (504) penetrates the mold core (2) and is fixedly connected to the fixed mold (3), and a ejector assembly (7) is arranged on one side of the casting assembly (5); The mold core (2) comprises a mold body (201), a plastic product (6) is mounted on the mold body (201), a mold body (201) matching the pouring tube (501) is bored on the mold body (201), a through hole and a tapered hole (203) matching the ejector assembly (7) are bored on the mold body (201), and the through hole is connected to the groove (202) through the tapered hole (203); The lower side wall of the mold body (201) is fixedly connected to an adjustment component (8), and the adjustment component (8) comprises two fixing frames (801) fixedly connected to the mold body (201), and a same magnetic sleeve (802) is fixedly connected between the two fixing frames (801), and the magnetic sleeve (802) is sleeved on the ejector pin component (7).

2. The injection mold with an anti-damage dome ejector pin structure according to claim 1, characterized in that: The ejector pin assembly (7) comprises a submerged ejector pin (701) plugged into a mold body (201), a notch (702) being cut on the submerged ejector pin (701), a heating element (703) being installed inside the submerged ejector pin (701), and an electric heating plate (704) being installed on the upper end of the heating element (703).

3. The injection mold with an anti-damage dome ejector pin structure according to claim 2, characterized in that: The submersible ejector pin (701) is internally slidably connected with a movable magnetic plug (705) that is magnetically attracted to the magnetic sleeve (802), and a connecting spring (706) is fixedly connected between the movable magnetic plug (705) and the heating element (703).

4. The injection mold with an anti-damage dome ejector pin structure according to claim 3, characterized in that: A switch button (707) electrically connected to the heating element (703) is installed on the lower inner wall of the submerged ejector pin (701), and two groups of exhaust holes (709) are drilled on the submerged ejector pin (701), which are respectively located on the upper and lower sides of the movable magnetic plug (705), and the diameter of the upper exhaust hole (709) is larger than the diameter of the lower exhaust hole (709).

5. The injection mold with an anti-damage dome ejector pin structure according to claim 4, characterized in that: The submersible ejector pin (701) is provided with a one-way valve (708) located at the lower side of the movable magnetic plug (705).

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