Anti-laddering injection mold
通过在注塑模具中使用阻断片和导流凹槽结构,将胶料分为两股并促进冷却,解决了注塑模具开模时抽丝的问题,提高了产品合格率和生产效率。
Patent Information
- Application Number
- CN202421112876.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-20
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-05-20
AI Technical Summary
When the injection mold is opened, the glue has not hardened, and the nozzle and the product are prone to wire extraction, resulting in unqualified product appearance and prolonged production cycle.
An injection mold with anti-scanning wire was designed. The blocking piece was used to divide the rubber flowing into two strands, and the rubber flowing into the injection port was cooled through the flow-drain groove structure, so that the rubber was cooled when it flowed into the molding cavity, so that it was opened. It is easier to break and prevents wire drawing.
It effectively improves the product's pass rate and production efficiency, prevents the adhesive wire from adsorbing on the product surface, and shortens the rubber cooling time.
Smart Images
Figure CN222271112U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of injection molds, in particular to an injection mold capable of preventing threading. Background Art
[0002] In the process of producing products by injection molds, hot melt rubber is first injected into the molding cavity, and then the hot melt rubber in the molding cavity is cooled and formed to obtain a molded plastic product. After the injection molding is completed, the temperature of the hot melt rubber and the nozzle is still high, and a long cooling time is required; if the cooling time is not enough and the mold is opened, because the rubber has not hardened and is still in a molten state, there will be a phenomenon of threading between the nozzle and the product, and the rubber thread will be adsorbed on the surface of the product, resulting in an unqualified product appearance and reducing the product qualification rate.
[0003] In addition, the rubber threads on the product generally need to be removed manually, which will greatly extend the production cycle of the product and reduce the production efficiency of the product.
[0004] Therefore, in view of the problem of thread drawing between the nozzle and the product in the current injection mold, it is urgent to develop a new machine or new technology to solve the above problem. Utility Model Content
[0005] The utility model aims to provide an anti-threading injection mold to solve the problem of threading between the nozzle and the product in the current injection mold.
[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0007] An anti-threading injection mold comprises an upper mold plate, a lower mold plate and a hot runner plate. The hot runner plate, the upper mold plate and the lower mold plate are arranged in sequence from top to bottom. An upper mold core is installed on the upper mold plate, and a lower mold core is installed on the lower mold plate. A nozzle abutting against the upper mold core is arranged through the upper mold plate. The upper mold core is provided with an injection port connected to the nozzle. The nozzle, the upper mold core and the lower mold core together form a molding cavity for molding products. A hot runner is arranged on the hot runner plate, and one end of the hot runner is connected to the nozzle. The rubber material in the hot runner flows into the molding cavity through the nozzle via the injection port of the upper mold core. A blocking piece is vertically inserted at the injection port of the upper mold core, and the blocking piece divides the rubber material flowing into the injection port into two.
[0008] Furthermore, the upper mold core is provided with a receiving groove for receiving the blocking piece at the injection port corresponding to the blocking piece, the receiving groove is communicated with the injection port, and the blocking piece is installed in the receiving groove.
[0009] Furthermore, the upper surface of the blocking piece and the upper surface of the upper mold core are in the same plane.
[0010] Furthermore, the minimum vertical height of the blocking piece is 2 mm-10 mm.
[0011] Furthermore, the thickness of the blocking sheet is 0.3 mm-0.9 mm.
[0012] Furthermore, a guide groove is provided on the upper mold core at the abutment portion between the nozzle and the upper surface of the upper mold core, and the injection port is located in the guide groove.
[0013] Furthermore, the cross-sectional area of the guide groove gradually decreases vertically from top to bottom.
[0014] Furthermore, the injection port is located at the lowest point of the guide groove.
[0015] Furthermore, the guide groove is an arc-shaped structure.
[0016] Furthermore, the upper surface of the blocking piece is kept flush with the groove wall of the guide groove.
[0017] The utility model has the beneficial effect of an anti-threading injection mold: the rubber material remaining in the injection port is divided into two strands by the blocking piece, so that the rubber material in the injection port is easier to be pulled off when the anti-threading injection mold is opened, thereby preventing the occurrence of threading. This not only improves the qualified rate of the product, but also improves the production efficiency of the product. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a cross-sectional view of the anti-threading injection mold of Example 1 of the utility model.
[0019] Figure 2 for Figure 1 Enlarged cross-sectional view of point A in the middle.
[0020] Figure 3 for Figure 1 A partial cross-sectional view of the upper mold core of an anti-threading injection mold is shown.
[0021] Figure 4 This is a cross-sectional view of the anti-threading injection mold of Example 2 of the utility model.
[0022] Figure 5 for Figure 4 Enlarged cross-sectional view at point B.
[0023] Figure 6 for Figure 4 A three-dimensional view of the upper mold core of the anti-threading injection mold shown in FIG.
[0024] Figure 7 for Figure 6 Enlarged stereogram of point C in the middle. DETAILED DESCRIPTION
[0025] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0026] The terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "vertical", "horizontal", etc. in the specification and claims of the utility model indicate directions or position relationships based on the directions or position relationships shown in the drawings, and are only for the clarity of expressing the technical solutions and the convenience of description, and therefore cannot be understood as limitations on the present application.
[0027] Embodiment 1:
[0028] See also Figure 1-Figure 3 An anti-threading injection mold includes an upper mold plate 10, a lower mold plate 20 and a hot runner plate 31. The hot runner plate 31, the upper mold plate 10 and the lower mold plate 20 are arranged in sequence from top to bottom. The upper mold plate 10 is installed with an upper mold core 11, and the lower mold plate 20 is installed with a lower mold core 21. The upper mold plate 10 is penetrated by a nozzle 12 abutting against the upper mold core 11, and the upper mold core 11 is provided with an injection port 111 connected to the nozzle 12. The nozzle 12, the upper mold core 11, and the lower mold core 21 together form a molding cavity 40 for molding products. The hot runner 31 plate 30 is provided with a hot runner 31, and one end of the hot runner 31 is connected to the nozzle 12. The rubber in the hot runner 31 flows into the molding cavity 40 through the nozzle 12 and the injection port 111 of the upper mold core 11. The upper mold core 11 is vertically inserted with a blocking piece 112 at the injection port 111, and the blocking piece 112 divides the rubber flowing into the injection port 111 into two.
[0029] From the above, the anti-threading injection mold proposed in the utility model divides the rubber material remaining in the injection port 111 into two strands through the blocking piece 112, so that the rubber material in the injection port 111 can be more easily broken when the anti-threading injection mold is opened, thereby preventing the occurrence of threading phenomenon, thereby not only improving the product qualification rate, but also improving the product production efficiency.
[0030] See also Figure 2-Figure 3The upper mold core 11 is provided with a receiving groove 113 for receiving the blocking piece 112 at the injection port 111 corresponding to the blocking piece 112. The receiving groove 113 is connected to the injection port 111, and the blocking piece 112 is installed in the receiving groove 113. Furthermore, the blocking piece 112 has a blocking portion and two abutting portions. The two ends of the blocking piece 112 are respectively the abutting portions, and the blocking portion connects the two abutting portions; the two abutting portions abut against the bottom wall of the receiving groove 113, and the blocking portion spans the injection port 111, thereby dividing the rubber material flowing into the injection port 111 into two.
[0031] More specifically, the upper surface of the blocking piece 112 and the upper surface of the upper mold core 11 are in the same plane.
[0032] See also Figure 2 , the minimum height L of the blocking piece 112 along the vertical direction is 2mm-10mm. It can be understood that the larger the minimum height L of the blocking piece 112, the better the diversion effect of the blocking piece 112 on the rubber material at the injection port 111, but too large a height will also lead to an increase in the mold cost. After many tests, the minimum height L is 2mm~10mm, which can be compatible with the requirements of diversion effect and cost. Preferably, the minimum height L of the blocking piece 112 is 3mm~5mm. Those skilled in the art can specifically set the minimum height L to 3mm, 3.5mm, 4mm, 4.5mm, 5mm, etc., and no sole limitation is made here.
[0033] See also Figure 3 , the thickness d of the blocking piece 112 is 0.3mm-0.9mm. It can be understood that the larger the thickness d of the blocking piece 112, the more obvious the diversion effect of the blocking piece 112 on the rubber at the injection port 111, but too large a thickness d will not only affect the flow of the rubber but also increase the mold cost. After many tests, the thickness d is between 0.3mm and 0.9mm, which is compatible with the requirements of diversion effect, circulation effect and cost. Preferably, the thickness d of the blocking piece 112 is between 0.4mm and 0.7mm. Those skilled in the art can specifically set the thickness d to 0.4mm, 0.5mm, 0.6mm, 0.7mm, etc., which is not limited here.
[0034] Embodiment 2:
[0035] An anti-threading injection mold, whose structure is similar to the structure of the anti-threading injection mold in Example 1, except that:
[0036] See also Figure 4-Figure 7The upper mold core 11 is provided with a guide groove 114 at the junction of the nozzle 12 and the upper surface of the upper mold core 11, and the injection port 111 is located in the guide groove 114. The rubber material of the hot runner 31 first flows into the guide groove 114 through the nozzle 12, and then flows into the injection port 111 through the guide groove 114 and enters the molding cavity 40. This arrangement allows the rubber material to be cooled to a certain extent in the process of flowing into the molding cavity 40, thereby shortening the cooling time of the rubber material, and further preventing the phenomenon of threading when opening the mold.
[0037] Furthermore, the cross-sectional area of the guide groove 114 gradually decreases vertically from top to bottom, and the injection port 111 is located at the lowest point of the guide groove 114. This arrangement enables the rubber on the guide groove 114 to flow evenly from top to bottom toward the injection port 111, thereby facilitating the blocking piece 112 to divide the rubber flowing into the injection port 111 into two.
[0038] In this embodiment, the guide groove 114 is an arc-shaped structure, which is conducive to the smooth flow of the rubber. In addition, the guide groove 114 can be set to a truncated cone structure, a prism structure, etc.
[0039] In addition, the upper surface of the blocking piece 112 remains flush with the groove wall of the guide groove 114. This arrangement prevents the blocking piece 112 from hindering the flow of the rubber on the guide groove 114, thereby affecting the blocking piece 112's diversion effect on the rubber at the injection port 111.
[0040] The utility model has the beneficial effect of an anti-threading injection mold: the threading phenomenon can be prevented, which not only improves the qualified rate of products, but also improves the production efficiency of products.
[0041] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.
Claims
1. An anti-snagging injection mold, comprising an upper mold plate, a lower mold plate and a hot runner plate, wherein the hot runner plate, the upper mold plate and the lower mold plate are arranged in sequence from top to bottom, an upper mold core is installed on the upper mold plate, and a lower mold core is installed on the lower mold plate, characterized in that: The upper mold plate is provided with a nozzle abutting against the upper mold core, and the upper mold core is provided with an injection port connected to the nozzle. The nozzle, the upper mold core and the lower mold core together form a molding cavity for molding products. A hot runner is provided on the hot runner plate, and one end of the hot runner is connected to the nozzle. The rubber in the hot runner flows into the molding cavity through the nozzle and the injection port of the upper mold core. The upper mold core is vertically inserted with a blocking piece at the injection port, and the blocking piece divides the rubber flowing into the injection port into two.
2. The anti-threading injection mold according to claim 1, characterized in that: The upper mold core is provided with a receiving groove for receiving the blocking piece at the injection port corresponding to the blocking piece, the receiving groove is communicated with the injection port, and the blocking piece is installed in the receiving groove.
3. The anti-threading injection mold according to claim 1, characterized in that: The upper surface of the blocking piece and the upper surface of the upper mold core are in the same plane.
4. The anti-threading injection mold according to claim 1, characterized in that: The minimum vertical height of the blocking piece is 2 mm to 10 mm.
5. The anti-threading injection mold according to claim 1, characterized in that: The thickness of the blocking sheet is 0.3 mm-0.9 mm.
6. The anti-threading injection mold according to claim 1, characterized in that: The upper mold core is provided with a flow guiding groove at the abutment position between the nozzle and the upper surface of the upper mold core, and the injection port is located in the flow guiding groove.
7. The anti-threading injection mold according to claim 6, characterized in that: The cross-sectional area of the guide groove gradually decreases from top to bottom along the vertical direction.
8. The anti-threading injection mold according to claim 7, characterized in that: The injection port is located at the lowest point of the guide groove.
9. The anti-threading injection mold according to claim 7, characterized in that: The guide groove is an arc-shaped structure.
10. The anti-threading injection mold according to claim 6, characterized in that: The upper surface of the blocking piece is kept flush with the groove wall of the guide groove.