CN209832495U - Automatic gate structure of cutting of injection mold - Google Patents
Automatic gate structure of cutting of injection mold Download PDFInfo
- Publication number
- CN209832495U CN209832495U CN201920227816.6U CN201920227816U CN209832495U CN 209832495 U CN209832495 U CN 209832495U CN 201920227816 U CN201920227816 U CN 201920227816U CN 209832495 U CN209832495 U CN 209832495U
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- mold
- sprue
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Abstract
The utility model relates to the technical field of molds, in particular to an automatic gate cutting structure of an injection mold, which comprises an upper mold and a lower mold, wherein a cavity for molding a product is arranged between the upper mold and the lower mold, the upper mold is provided with an injection hole and an injection channel, the lower mold is provided with a thimble mechanism and a gate cutter, the gate cutter is fixedly connected with the working end of the thimble mechanism, the working end of the thimble mechanism can move up and down relative to the lower mold, the gate cutter is provided with a gate channel, the injection hole is communicated with one end of the injection channel, the other end of the injection channel is communicated with the initial end of the gate channel, and the tail end; in the mold opening process, the working end of the ejector pin mechanism moves downwards, and the sprue channel is staggered with the cavity.
Description
Technical Field
The utility model relates to the technical field of mold, concretely relates to automatic runner structure of cutting of injection mold.
Background
The existing injection mold structurally comprises an upper mold and a lower mold, wherein a cavity for molding a product is arranged between the upper mold and the lower mold, the upper mold is provided with an injection hole and an injection channel, and the injection hole is communicated with the cavity through the injection channel; after injection molding is finished, a product which is changed from liquid plastic into fixed plastic is formed in the cavity, similarly, solid plastic can also be formed in the injection channel, the solid plastic in the injection channel is generally called as a water gap or a pouring gate, the water gap can be formed on the molded product after the product is demoulded, and in the actual production process, the water gap is removed in a manual cutting mode.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to the not enough among the prior art, and provide an injection mold automatic gate structure of cutting that work efficiency is high.
The purpose of the utility model is realized through the following technical scheme: the automatic gate cutting structure of the injection mold comprises an upper mold and a lower mold, wherein a cavity for molding a product is arranged between the upper mold and the lower mold, the upper mold is provided with an injection hole and an injection channel, the lower mold is provided with an ejector pin mechanism and a gate cutter, the gate cutter is fixedly connected with the working end of the ejector pin mechanism, the working end of the ejector pin mechanism can move up and down relative to the lower mold, the gate cutter is provided with a gate channel, the injection hole is communicated with one end of the injection channel, the other end of the injection channel is communicated with the starting end of the gate channel, the tail end of the gate channel is communicated with the cavity, and the outlet edge of the tail; and during injection molding, a water gap connected with a product to be cut in the cavity is formed in the sprue channel.
In the die sinking process, the working end of the ejector pin mechanism moves downwards, the sprue cutter moves downwards along with the ejector pin mechanism, so that a water gap connected with a product to be cut in the die cavity and located in the sprue channel is cut off, and meanwhile, the outlet of the sprue channel is staggered with the glue inlet of the die cavity.
Wherein the gate channel is obliquely arranged.
Wherein the cross-sectional area of the gate passage gradually decreases from the beginning to the end.
Wherein, the upper half part of the trimming of the sprue channel is a cutting edge inclining downwards.
The utility model has the advantages that: according to the working process of the automatic sprue cutting structure of the injection mold, when the mold is opened, the working end of the ejector pin mechanism moves downwards, the ejector pin drives the sprue cutter fixedly connected with the ejector pin to move downwards, the sprue cutter cuts off a sprue connected with a product in a cavity in the moving process, at the moment, a sprue channel is staggered with the cavity, and the sprue on the product is cut off together in the mold opening process; when the mold is closed, the working end of the ejector pin mechanism returns to drive the sprue cutter to move upwards and return, so that the sprue channel is communicated with the cavity.
Drawings
The present invention is further explained by using the drawings, but the embodiments in the drawings do not constitute any limitation to the present invention, and for those skilled in the art, other drawings can be obtained according to the following drawings without any inventive work.
Fig. 1 is a schematic structural diagram of an automatic gate structure of cutting of injection mold in the present invention.
Fig. 2 is a sectional view of an automatic gate structure of the injection mold of the present invention.
Fig. 3 is the utility model provides an injection mold cuts the structure schematic diagram of runner cutter of runner structure automatically.
Reference numerals: the device comprises a product to be cut 1, an ejector pin mechanism 2, a working end 21, a sprue cutter 3, a sprue channel 31 and a water gap 4.
Detailed Description
The invention will be further described with reference to the following examples.
The utility model relates to a concrete implementation mode of an automatic sprue cutting structure of an injection mold, as shown in figures 1 to 3, the injection mold comprises an upper mold (not shown) and a lower mold (not completely shown), a cavity (not shown) for molding products is arranged between the upper mold and the lower mold, the upper mold is provided with an injection hole and an injection channel, the lower mold is provided with an ejector pin mechanism 2 and a sprue cutter 3, the sprue cutter 3 is fixedly connected with a working end 21 of the ejector pin mechanism 2, the fixed connection mode (not shown in the figure) can be fixed by adopting a thread fit mode, the working end 21 of the ejector pin mechanism 2 can move up and down relative to the lower die, and it should be noted that the ejector pin mechanism 2 can adopt a pneumatic ejector pin and a hydraulic ejector pin, and can also fixedly connect the sprue cutter 3 with a template which can move relative to the lower die, as long as the sprue cutter 3 can do up-and-down reciprocating motion. The gate cutter 3 is provided with a gate channel 31, an injection hole is communicated with one end of the injection channel, the other end of the injection channel is communicated with the starting end of the gate channel 31, the tail end of the gate channel 31 is communicated with the cavity, the outlet edge of the tail end of the gate channel 31 is a sharp cutting edge, and the upper half part of the cutting edge is a downward inclined cutting edge. After injection molding, a water gap connected with the product 1 to be cut is formed in the sprue channel 31, after the mold is opened, the sprue channel 31 moves downwards along with the ejector pin mechanism 2, and the water gap is cut off from the product 1 to be cut by a cutting edge of the sprue channel 31.
In order to improve the injection quality and the injection efficiency, the gate channel 31 is obliquely arranged, the cross section area of the gate channel 31 is gradually reduced from the beginning end to the tail end, the pressure of plastic liquid injected into the die cavity is changed by changing the size of the gate channel 31 from large to small, the liquid plastic can be injected into the die cavity in a water column state, and the injection quality is improved.
In order to improve the quality of injection molding and improve the injection efficiency, the upper half part of the trimming edge of the sprue channel is a cutting edge which inclines downwards.
In the working process of the automatic gate cutting structure of the injection mold of the embodiment, when the mold is opened, the working end 21 of the ejector pin mechanism 2 moves downwards, the ejector pin mechanism 2 drives the gate cutter 3 fixedly connected with the ejector pin mechanism to move downwards, the gate cutter 3 cuts off the gate 4 on the product to be cut 1 in the cavity in the moving process, at the moment, the outlet of the gate channel 31 is staggered with the glue inlet of the cavity, and the gate 4 of the product to be cut 1 is cut off together in the mold opening process; when the mold is closed, the working end 21 of the ejector pin mechanism 2 returns to drive the sprue cutter 3 to move upwards, so that the sprue channel 31 is communicated with the cavity.
It should be finally noted that the above embodiments are only intended to illustrate the technical solutions of the present invention, and not to limit the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.
Claims (4)
1. An automatic gate cutting structure of an injection mold comprises an upper mold and a lower mold, wherein a cavity for molding a product is arranged between the upper mold and the lower mold, the upper mold is provided with an injection hole and an injection channel, and the automatic gate cutting structure is characterized in that the lower mold is provided with an ejector pin mechanism and a gate cutter, the gate cutter is fixedly connected with the working end of the ejector pin mechanism, the working end of the ejector pin mechanism can move up and down relative to the lower mold, the gate cutter is provided with a gate channel, the injection hole is communicated with one end of the injection channel, the other end of the injection channel is communicated with the initial end of the gate channel, the tail end of the gate channel is communicated with the cavity, and; when in injection molding, a water gap connected with a product to be cut in the cavity is formed in the sprue channel,
in the die sinking process, the working end of the ejector pin mechanism moves downwards, the sprue cutter moves downwards along with the ejector pin mechanism, so that a water gap connected with a product to be cut in the die cavity and located in the sprue channel is cut off, and meanwhile, the outlet of the sprue channel is staggered with the glue inlet of the die cavity.
2. The automatic gate cutting structure of an injection mold according to claim 1, wherein: the sprue channel is obliquely arranged.
3. The automatic gate cutting structure of an injection mold according to claim 1, wherein: the cross-sectional area of the gate passage gradually decreases from the beginning to the end.
4. The automatic gate cutting structure of an injection mold according to claim 1, wherein: the upper half part of the trimming edge of the sprue channel is a cutting edge inclining downwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920227816.6U CN209832495U (en) | 2019-02-22 | 2019-02-22 | Automatic gate structure of cutting of injection mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920227816.6U CN209832495U (en) | 2019-02-22 | 2019-02-22 | Automatic gate structure of cutting of injection mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209832495U true CN209832495U (en) | 2019-12-24 |
Family
ID=68904291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920227816.6U Active CN209832495U (en) | 2019-02-22 | 2019-02-22 | Automatic gate structure of cutting of injection mold |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209832495U (en) |
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2019
- 2019-02-22 CN CN201920227816.6U patent/CN209832495U/en active Active
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