An injection mold

Abstract

An injection mold with a cold sprue sleeve comprises: an injection cavity; an ejector plate for ejecting an injection molded part out of the injection mold; a guide cavity penetrating the ejector plate; a guide member arranged in the guide cavity on a side close to the injection cavity; an injection gap between the guide member and the ejector plate; the guide member having a guide channel for an injection solution to enter the injection cavity, and an injection molding machine liquid outlet pipe entering the guide cavity to pass through the ejector plate and communicate with the guide channel; by providing the above-mentioned injection mold, the problem that the injection outlet of the existing injection mold is generally above the ejector plate, and when the injection molding machine injects liquid into the injection inlet of the sprue sleeve, the liquid is not in a horizontal state with the injection inlet during injection, and may directly flow through the ejector plate, resulting in leakage.

Description

Technical Field

[0001] The invention relates to the field of injection molds, in particular to an injection mold. Background Art

[0002] Injection mold is a tool for producing plastic products. It is also a tool for giving plastic products a complete structure and precise size. The heated and molten plastic is injected into the mold from the nozzle at high pressure, and the molded product is obtained after cooling and curing.

[0003] The sprue sleeve is a flow channel that allows the molten plastic material to be injected from the nozzle of the injection molding machine into the inside of the mold. It is a metal accessory that connects the molding mold and the injection molding machine. In the prior art, the injection outlet of the sprue sleeve is generally above the ejector plate. When the injection molding machine injects liquid into the injection inlet of the sprue sleeve, the plastic liquid will enter the injection cavity through the flow channel in the ejector plate. However, when the injection molding machine injects liquid into the injection inlet of the sprue sleeve, the injection inlet is not necessarily in a horizontal state with the injection inlet, and may flow directly through the ejector plate. At this time, the plastic liquid leaking from the sprue sleeve will enter the ejector plate. After the plastic liquid is cooled and formed, it will cause damage to the ejector plate, thereby increasing the equipment maintenance cost. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to solve the problem that the injection outlet of the existing injection mold is generally above the ejector plate. When the injection molding machine injects liquid into the injection inlet of the gate sleeve, the liquid is not necessarily in a horizontal state with the injection inlet, and may directly flow through the ejector plate, resulting in leakage. To this end, the present invention provides an injection mold, comprising: an injection cavity; an ejector plate, used to eject the injection molded part out of the injection mold; a guide cavity, which passes through the ejector plate; a guide member, which is arranged in the guide cavity and is close to one side of the injection cavity; an injection gap is provided between the guide member and the ejector plate; the guide member has a guide channel for the injection solution to enter the injection cavity, and the liquid outlet pipe of the injection molding machine enters the guide cavity to pass through the ejector plate and communicate with the guide channel.

[0005] The injection mold cavity is provided with a through hole for the flow guide member to pass through on the mold cavity on the side facing the flow guide cavity.

[0006] It also includes: a fixing plate, the ejector plate is arranged on the fixing plate, and the fixing plate has a guide hole communicated with the guide cavity.

[0007] The cross-sectional area of ​​the guide channel on a side close to the guide cavity is smaller than the cross-sectional area of ​​the guide channel on a side close to the injection cavity.

[0008] The guide channel is a columnar structure, and the inner diameter of the guide channel gradually increases from a side close to the guide cavity toward a side close to the injection cavity.

[0009] The guide channel is provided with a guide groove at an opening edge close to the guide cavity.

[0010] The flow guide is a columnar structure, and one end of the flow guide facing the ejector plate is provided with a limiting step that abuts against the opening edge of the end of the flow guide cavity.

[0011] The injection cavity is provided with a fluid channel for the injection solution to enter the interior thereof, and the guide channel is connected with the fluid channel.

[0012] The flow guiding cavity is connected to the fixing plate via threads.

[0013] The flow guide is a cold sprue sleeve.

[0014] The technical solution of the present invention has the following advantages:

[0015] 1. The present invention provides an injection mold, comprising: an injection cavity; an ejector plate for ejecting an injection molded part out of the injection mold; a flow guide cavity penetrating the ejector plate; a flow guide member arranged in the flow guide cavity and close to one side of the injection cavity; an injection gap between the flow guide member and the ejector plate; the flow guide member having a flow guide channel for an injection molding solution to enter the injection molding cavity, and an injection molding machine liquid outlet pipe entering the flow guide cavity to pass through the ejector plate and communicate with the flow guide channel; in this solution, by forming the flow guide cavity, The ejector plate is penetrated; then the liquid outlet pipe of the injection molding machine is passed into the guide cavity to be communicated with the guide channel of the guide member, and the guide channel is communicated with the injection molding cavity, wherein an injection molding gap is provided between the guide member and the ejector plate. When the injection molding machine directly passes the injection molding solution into the guide channel through the liquid outlet pipe between the injection molding gap, and then enters the injection molding cavity, the above-mentioned arrangement does not need to flow through the ejector plate, so the injection molding solution can be prevented from leaking to the ejector plate, thereby achieving the effect of preventing the ejector plate from being damaged.

[0016] 2. The present invention provides an injection mold, further comprising: a fixed plate, the ejector plate is arranged on the fixed plate, and the fixed plate has a guide hole connected to the guide cavity; by setting the guide hole, it is convenient for the liquid outlet pipe of the injection molding machine to enter the guide cavity and be connected with the guide channel between the injection molding gaps. The above setting method is convenient and simple.

[0017] 3. The present invention provides an injection mold, wherein the cross-sectional area of ​​the guide channel on the side close to the guide cavity is smaller than the cross-sectional area of ​​the guide channel on the side close to the injection cavity; through the above-mentioned setting method, it can be ensured that after the injection molding solution is cooled and formed in the injection mold, the mold is opened to facilitate the removal of the cold material in the guide channel.

[0018] 4. The present invention provides an injection mold, wherein the guide channel is a columnar structure, and the inner diameter of the guide channel gradually increases from the side close to the guide cavity toward the side close to the injection cavity. Through the setting of the columnar structure, the cooled and molded cold material can be simply and conveniently removed from the guide channel to prevent the guide channel from being blocked and affecting the next injection molding.

[0019] 5. The present invention provides an injection mold, wherein the guide channel is provided with a guide groove near the opening edge of the guide cavity, and the guide groove is adapted to the liquid outlet pipe of the injection molding machine, so as to facilitate the smooth introduction of the injection molding solution into the guide channel and prevent leakage.

[0020] 6. The present invention provides an injection mold, wherein the guide member is a columnar structure, and a limiting step is provided at one end thereof facing the ejector plate, which abuts against the opening edge of the end of the guide cavity; by providing the limiting step, the guide member can be abutted against the limiting step, which is simple to operate, easy to use, and convenient for disassembly and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 Provided is a front view of an injection mold for the present invention;

[0023] Figure 2 A schematic diagram of a three-dimensional structure of an injection mold is provided for the present invention;

[0024] Description of reference numerals:

[0025] 1-fixed plate; 2-thrust plate; 3-flow guide cavity; 4-flow guide hole; 5-flow guide piece; 6-fluid channel; 7-limiting step; 9-flow guide channel; 16-guide groove; 17-injection cavity. DETAILED DESCRIPTION

[0026] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 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 invention can be understood according to specific circumstances.

[0029] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0030] Example 1

[0031] This embodiment provides an injection mold, such as Figure 1 , Figure 2As shown, it includes: an injection cavity 17; an ejector plate 2, used to eject the injection molded part out of the injection mold; a guide cavity 3, which passes through the ejector plate 2; a guide member 5, which is arranged in the guide cavity 3 and is close to one side of the injection cavity 17; an injection gap is provided between the guide member 5 and the ejector plate 2; the guide member 5 A guide channel 9 is provided for the injection molding solution to enter the injection molding cavity 17, and the liquid outlet pipe of the injection molding machine enters the guide cavity 3 to pass through the ejector plate 2 and communicate with the guide channel 9; in this scheme, the guide cavity 3 is passed through the ejector plate 2; then the liquid outlet pipe of the injection molding machine is passed into the guide cavity 3 to communicate with the guide channel 9 of the guide member 5, and the guide channel 9 is communicated with the injection molding cavity 17, wherein there is an injection molding gap between the guide member 5 and the ejector plate 2, when the injection molding machine directly passes the injection molding solution into the guide channel 9 through the liquid outlet pipe between the injection molding gap, and then enters the injection molding cavity 17, the above-mentioned arrangement does not need to flow through the ejector plate 2, so the injection molding solution can be prevented from leaking to the ejector plate 2, thereby achieving the effect of preventing the ejector plate 2 from being damaged.

[0032] In this embodiment, the injection cavity 17 is provided with a through hole for the guide member 5 to pass through on the mold cavity facing the guide cavity 3, and the injection cavity 17 is provided with a fluid channel 6 for the injection solution to enter the interior thereof, and the guide channel 9 is connected to the fluid channel 6.

[0033] Among them, in this embodiment, as the most preferred implementation, the flow guide member 5 is a cold sprue sleeve.

[0034] In this embodiment, it also includes: a fixed plate 1, the ejector plate 2 is arranged on the fixed plate 1, and the fixed plate 1 has a guide hole 4 connected with the guide cavity 3, which can facilitate the injection molding machine liquid outlet pipe to enter the guide cavity 3 and communicate with the guide channel 9 between the injection molding gaps.

[0035] In addition, in this embodiment, the guide channel 9 is preferably a columnar structure, and the inner diameter of the guide channel 9 gradually increases from the side close to the guide cavity 3 toward the side close to the injection cavity 17. Through this setting, the cooled and formed cold material can be simply and conveniently removed from the guide channel 9 to prevent the guide channel 9 from being blocked and affecting the next injection molding.

[0036] In this embodiment, the guide channel 9 is provided with a guide groove 16 near the opening edge of the guide cavity 3. The guide groove 16 is adapted to the liquid outlet pipe of the injection molding machine, which can facilitate the smooth introduction of the injection molding solution into the guide channel 9 and prevent leakage.

[0037] In this embodiment, a limiting step 7 is provided at one end of the ejector plate 2 to abut against the opening edge of the end of the guide cavity 3. By providing the limiting step 7, the guide member 5 can abut against the limiting step 7, which is simple to operate and easy to use.

[0038] In addition, as the most preferred embodiment, the guide member 5 is detachably connected to the guide cavity 3, and is convenient for regular cleaning and replacement.

[0039] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. An injection mold with a cold sprue bushing, characterized in that: include: Injection mold cavity (17); An ejector plate (2) is used to eject the injection-molded part out of the injection mold; A flow guide cavity (3) passing through the ejector plate (2); A flow guide (5) is arranged in the flow guide cavity (3) on a side close to the injection cavity (17); an injection gap is provided between the flow guide (5) and the ejector plate (2); the flow guide (5) has a flow guide channel (9) for providing injection molding solution to enter the injection cavity (17); an injection molding machine liquid outlet pipe enters the flow guide cavity (3) to pass through the ejector plate (2) and communicate with the flow guide channel (9); the flow guide (5) is a columnar structure, and a limiting step (7) is provided at one end thereof facing the ejector plate (2) and abuts against an opening edge of the end of the flow guide cavity (3); A fixed plate (1), the ejector plate (2) being arranged on the fixed plate (1), and the fixed plate (1) having a flow guide hole (4) communicating with the flow guide cavity (3).

2. The injection mold with a cold sprue bushing according to claim 1, characterized in that: The injection mold cavity (17) is provided with a through hole for the flow guide member (5) to pass through on the mold cavity on the side facing the flow guide cavity (3).

3. The injection mold with a cold sprue bushing according to claim 1, characterized in that: The cross-sectional area of ​​the guide channel (9) on a side close to the guide cavity (3) is smaller than the cross-sectional area of ​​the guide channel (9) on a side close to the injection cavity (17).

4. The injection mold with a cold sprue bushing according to claim 3, characterized in that: The guide channel (9) is a columnar structure, and the inner diameter of the guide channel (9) gradually increases from a side close to the guide cavity (3) toward a side close to the injection cavity (17).

5. The injection mold with a cold sprue bushing according to claim 3 or 4, characterized in that: The guide channel (9) is provided with a guide groove (16) at an opening edge close to the guide cavity (3).

6. The injection mold with a cold sprue bushing according to claim 1, characterized in that: The injection molding cavity (17) is provided with a fluid channel (6) for the injection molding solution to enter the interior thereof, and the guide channel (9) is connected to the fluid channel (6).

7. The injection mold with a cold sprue bushing according to claim 1, characterized in that: The flow guide cavity (3) is connected to the fixing plate (1) via threads.

8. The injection mold with a cold sprue bushing according to claim 1, characterized in that: The flow guide (5) is a cold sprue sleeve.

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