Structure and mold for improving swarf pulling of submarine gate of injection mold
By improving the structure of the submarine gate in injection molds, adopting a multi-stage runner, submarine runner, and arched runner design, and setting an ejector and radius, the problem of material chipping caused by the submarine gate was solved, the product qualification rate was improved, and the molding risk was reduced.
Patent Information
- Application Number
- CN202520444495.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-14
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-03-14
AI Technical Summary
Existing submarine gate designs are prone to severe material chipping in injection molds, affecting the appearance of plastic parts and product yield, and posing a risk of mold failure.
Design an improved submarine gate structure for injection molds, including a gate body, a graded runner, a submerged runner, and an arched runner, with an ejector section and a radius (R-angle) to form an arch-shaped deformation zone, reducing deformation force and friction, and preventing the generation of material chips.
It effectively reduces the deformation and friction of the gate during ejection, prevents the generation of material chips, improves the product qualification rate, and reduces the risk of mold pressing.
Smart Images
Figure CN223918550U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of latent gate, specifically, relates to a structure and mould for improving the material drawing scrap of latent gate of injection mould. BACKGROUND
[0002] The latent gate is high in flexibility, can hide in the inner surface or side of a plastic part or the like, avoids common problems such as spray mark and air mark, and is widely applied to various mould designs. Figure 1 As shown in the figure, it is a commonly used latent gate at present, and the latent gate does not design a deformation zone or the designed deformation zone is unreasonable and does not achieve the desired effect, and the material drawing scrap is often serious, the parting surface and the machine table door are full of material scrap, the appearance of the plastic part is affected, the qualified rate of the product is reduced, and there is the risk of die pressing.
[0003] Therefore, the applicant specifically proposes the present application after studying the prior art. CONTENT OF THE UTILITY MODEL
[0004] The utility model provides a structure for improving the material drawing scrap of latent gate of injection mould, latent gate and mould, aims at improving at least one of the above technical problems.
[0005] In order to solve the above technical problems, the utility model provides a structure for improving the material drawing scrap of latent gate of injection mould, which comprises a gate body, the gate body has a hierarchical runner, a latent runner and an arched runner which is arched upwards, the hierarchical runner is used for being communicated with a feeding channel of a mould, the latent runner is used for being communicated with a cavity of the mould, the latent runner and the hierarchical runner are communicated through the arched runner, a ejection part is communicated with the bottom of one end of the arched runner of the hierarchical runner, and the ejection part can be used for abutting with a mould ejector pin.
[0006] As further optimization, the latent runner extends downwards and forms a taper shape which is wide at the top and narrow at the bottom.
[0007] As further optimization, the hierarchical runner extends along the horizontal direction, and both ends of the arched runner are located on the same horizontal plane as the hierarchical runner.
[0008] As further optimization, an R angle is arranged at the connection between the latent runner and the arched runner.
[0009] As further optimization, the ejection part extends downwards to form a cylindrical runner, and the height of the cylindrical runner is greater than the distance between the gate position and the parting surface.
[0010] As further optimization, a main runner is further included, and a plurality of gate bodies are arranged, and the plurality of gate bodies are communicated with the main runner through the hierarchical runner.
[0011] The application also provides a mold with the structure for improving the material scrap of the latent gate of the injection mold.
[0012] By adopting the technical scheme, the following technical effects can be achieved.
[0013] The structure for improving the material scrap of the latent gate of the injection mold has the gate body connected with the feeding channel and the cavity of the mold, so that the injection material in a molten state is injected into the cavity to form a plastic part after cooling. The gate body has a hierarchical runner, a latent runner and an arched runner which is arched upwards, the hierarchical runner and the latent runner are connected through the arched runner, and an ejection part is arranged at the bottom of one end of the hierarchical runner close to the arched runner, so that a deformation area in the shape of an arch bridge is formed between the latent runner and the ejection position, the gate body has enough space to deform when being ejected, a deformation force of the gate body when being ejected is reduced, the extrusion force of the gate on the mold parts is reduced, and the friction force between the material head and the mold parts is prevented from being too large to generate material scrap. In addition, in the further arrangement, an R angle is arranged at the connection between the latent runner and the arched runner, so that the sharp angle scraping the runner to generate material scrap is avoided. BRIEF DESCRIPTION OF DRAWINGS
[0014] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor.
[0015] Figure 1 is a schematic view of the gate structure in the prior art;
[0016] Figure 2 is a schematic view of one embodiment of the structure for improving the material scrap of the latent gate of the injection mold of the present application;
[0017] Figure 3 is a schematic view of another embodiment of the structure for improving the material scrap of the latent gate of the injection mold of the present application;
[0018] Figure 4 is a partial sectional view of the mold of the present application;
[0019] Figure 5 is a schematic view of the mold of the present application;
[0020] The markings in the diagram are: 1-Gate body; 11-Graded runner; 12-Subsurface runner; 13-Arched runner; 14-Ejector; 15-R-angle; 16-Main runner; 20-Hot runner; 21-Male mold plate; 22-Male mold core; 23-Female mold plate; 24-Female mold core; 25-Ejector pin; 26-Ejector plate; 27-Fixing plate; 28-Top plate; 29-Heat insulation plate; 30-Positioning ring; 32-Bottom plate; 33-Ejector roller hole; 34-Hydraulic cylinder; 35-Rack and pinion; 36-Gear; 5-Plastic part. Detailed Implementation
[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0022] Example
[0023] Depend on Figures 2 to 4 As shown, this utility model provides a structure for improving the material removal of a submarine gate in injection molds, including a gate body 1. The gate body 1 has a graded runner 11, a submarine runner 12, and an upwardly arched runner 13. The graded runner 11 is used to communicate with the mold's feed channel, and the submarine runner 12 is used to communicate with the mold cavity. The submarine runner 12 and the graded runner 11 are connected through the arched runner 13. The graded runner 11 has an ejector portion 14 at its bottom near one end of the arched runner 13. The ejector portion 14 extends downward to form a columnar runner, and the height of the columnar runner is greater than the distance between the gate position and the parting surface. This allows molten injection material to enter the columnar runner, and after cooling, forms a columnar ejector portion for contacting the ejector pin 25, causing the ejector pin 25 to eject the gate.
[0024] The submersible channel 12 extends obliquely from top to bottom toward the side away from the arched channel 13, forming a cone shape that is wider at the top and narrower at the bottom. The grading channel 11 extends horizontally, and both ends of the arched channel 13 are located on the same horizontal plane as the grading channel 11. An R-angle 15 is provided at the connection between the submersible channel 12 and the arched channel 13.
[0025] Referring to Figure 3 As shown in the figure, in this embodiment, the molten injection material is injected through the feeding channel of the mold, and then sequentially passes through the hierarchical runner 11, the arch-shaped runner 13 and the latent runner 12 to enter the cavity of the mold to form the plastic part 5. The surface roughness of all the runners is above Ra0.1. By arranging the arch-shaped runner 13 between the hierarchical runner 11 and the latent runner 12, and arranging the ejection part at one end of the hierarchical runner 11 close to the arch-shaped runner 13, a deformation area in the shape of an arch bridge is formed between the latent runner 12 and the ejection position, so that the latent gate has sufficient deformation space when being ejected, the deformation force of the gate when being ejected can be reduced, the extrusion force of the gate on the mold parts is reduced, and the friction between the sprue and the mold parts is prevented from being too large to generate scraps. In addition, an R angle is arranged at the connection between the latent runner and the arch-shaped runner, which can avoid the formation of sharp corners when the straight flow is turned to scratch the runner to generate scraps. This structure can be applied to all plastic materials using latent gates.
[0026] Referring to Figure 4 As shown in the figure, it also includes a main runner 16, and the gate body 1 is provided with a plurality of gate bodies 1, and the plurality of gate bodies 1 are respectively communicated through the hierarchical runner 11 and the main runner 16. The number of gate bodies 1 can be increased or decreased according to the number of cavities of the mold, so as to be suitable for different types of molds.
[0027] The application also provides a mold, and the mold is internally provided with any one of the structures for improving the sprue scraps of the latent gate of the injection mold. In an embodiment, referring to Figure 5As shown, the mold is a hot runner, front mold advances and retreats tooth, ejector pin ejection, latent gate structure. Specifically, it also includes a male die plate 21, a male die plate kernel 22, a female die plate 23, a female die plate kernel 24, a ejector pin 25 and a ejector pin plate 26, the female die plate kernel 24 is fixed in the female die plate 23, the male die plate kernel 22 is fixed in the male die plate 21, the female die plate kernel 24 and the male die plate kernel 22 have a plurality of cavities, a plurality of gate bodies 1 matched with the cavities and a main runner 16 communicating the gate bodies. The ejector pin 25 top passes through the male die plate 21, the male die plate kernel 22 in turn and abuts on the ejection part 14, the ejector pin 25 bottom is fixedly connected with the ejector pin plate 26, the ejector pin plate 26 is used for fixing and pushing the ejector pin 25, ensuring the stability of the ejector pin 25 and the smooth ejection. The female die plate 23 top is sequentially provided with a fixed plate 27, a top plate 28 and a heat insulation plate 29 from bottom to top, the hot runner 20 bottom sequentially passes through the heat insulation plate 29, the top plate 28, the fixed plate 27, the female die plate 23 and the female die plate kernel 24 and communicates with the main runner, the hot runner 20 top is provided with a positioning ring 30, which is used for mold machine nozzle. Among them, the fixed plate 27 is used for fixing the bearing and the ruler to ensure the stability of the tooth action; the heat insulation plate 29 is used for blocking the heat transfer between the mold and the machine table, reducing the heat loss of the mold; the top plate 28 is used for fixing the hot runner 20 and the positioning ring 30, the ejector pin plate 26 below is provided with a bottom plate 32, the bottom plate 32 is used for fixing the middle support, the machine table mold, the bottom plate 32 is provided with a top stick hole 33, the top stick hole 33 is used for avoiding the machine table top stick ejection, and further includes an oil cylinder 34, a rack 35 and a gear 36 for transmission, etc., for driving each mechanism to rotate.
[0028] In the embodiment, the hot runner 20 is connected with an injection molding machine (not shown) as a feeding channel of the mold, the molten injection material is injected into the hot runner 20 through the injection molding machine, enters the main runner, is branched to each gate body 1, enters the cavity through the gate body 1 and is cooled to form the plastic part 5. After the mold is opened, the ejector pin 25 ejects and forcibly pushes out the gate body 1, under the reaction force of the male die plate kernel 22, the plastic part 5 is separated from the gate body 1. In the pushing-out process, the gate is pushed out upward along the submarine runner 12, and the arch bridge type deformation area between the ejection position and the submarine runner 12 can provide sufficient deformation space for the gate body. The R angle design between the submarine runner 12 and the arch runner 13 can prevent the generation of sharp corner scratches in the runner to generate material scraps.
[0029] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A structure for improving a sprue pull tab of a latent gate of an injection mold, comprising a gate body, characterized in that, The gate body has a grading runner, a submerged runner and an upwardly arched arcuate runner, the grading runner is used for communicating with the feeding channel of the mold, the submerged runner is used for communicating with the cavity of the mold, the submerged runner and the grading runner communicate through the arcuate runner, the grading runner is provided with an ejection part at the bottom near one end of the arcuate runner, and the ejection part can be used for abutting against the mold ejector pin.
2. The structure for improving the sprue pull tab of a latent gate of an injection mold according to claim 1, wherein The submerged runner extends obliquely from top to bottom towards the side away from the arcuate runner, and forms a taper with the upper part being wide and the lower part being narrow.
3. The structure for improving the sprue pull tab of a latent gate of an injection mold according to claim 1, wherein The grading runner extends in the horizontal direction, and both ends of the arcuate runner are located on the same horizontal plane as the grading runner.
4. The structure for improving the sprue pull tab of a latent gate of an injection mold according to claim 3, wherein An R angle is arranged at the connection between the submerged runner and the arcuate runner.
5. The structure for improving the sprue pull tab of a latent gate of an injection mold according to claim 1, wherein The ejection part extends downward to form a cylindrical runner, and the cylindrical height is greater than the distance between the gate position and the parting surface.
6. The structure for improving the sprue pull tab of a latent gate of an injection mold according to any one of claims 1 to 5, characterized in that A plurality of gate bodies are arranged, and the plurality of gate bodies communicate with the main runner through the grading runner.
7. A mold characterized in that The mold is provided with the structure for improving the injection mold submerged gate material drawing scraps according to any one of claims 1-6.