Injection molded product with flow channel facilitating removal and mold therefor

Abstract

The application discloses an injection molding product and a mold facilitating removal of a flow channel. The injection molding product comprises a product body and a plurality of flow channel condensates integrally arranged outside the product body. The flow channel condensates have a weak area at the connection with the product body, and the flow channel condensates are adapted to be forcibly separated from the product body through the weak area. The application also discloses a mold for forming the injection molding product. The application has the beneficial effect that the weak area is arranged at the flow channel condensate of the product, and the product can be forcibly separated from the flow channel through the weak area, for example, the flow channel is removed by breaking or tearing by hand, which greatly simplifies the separation process, reduces the operation difficulty, and the separation position is determined based on the weak area, thereby improving the overall production efficiency and product quality.

Description

Technical Field

[0001] This application relates to the field of mold technology, and in particular to an injection mold that facilitates the removal of runners. Background Technology

[0002] Injection molding, also known as injection molding, is a molding method that combines injection and molding. The advantages of injection molding include high production speed and efficiency, automated operation, a wide variety of designs and shapes (from simple to complex), and sizes ranging from large to small. It also produces dimensionally accurate products, facilitates product updates and replacements, and can create complex shapes. Injection molding is suitable for mass production and molding processes involving complex shapes.

[0003] like Figure 1 The diagram shows a schematic of an injection-molded product. After molding, the product has many runners (solidified material) around its perimeter, requiring subsequent trimming processes, making runner removal inconvenient. To address this issue, an injection-molded product and mold that facilitates runner removal are proposed to solve the aforementioned technical problems. Utility Model Content

[0004] One of the objectives of this application is to provide an injection-molded product that facilitates the removal of runners.

[0005] Another objective of this application is to provide a mold.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows: an injection molded product that facilitates the removal of runners, comprising a product body and a plurality of runner solids integrally disposed on the outside of the product body, wherein the connection between the runner solids and the product body has a weak area, and the runner solids are adapted to be forcibly separated from the product body through the weak area.

[0007] Preferably, the flow channel slurry has a notch on the outer side of its end near the product body, and the notch extends along the width direction of the flow channel slurry, thereby forming the weak area.

[0008] Preferably, the vertical cross-section of the notch has a "V" shaped structure.

[0009] A mold for forming the above-mentioned injection molded product with easily removable runners, comprising a mold body and a runner, a gate, and a cavity disposed within the mold body and connected in sequence, wherein a protrusion is provided on the inner side of the gate for molding the weak area.

[0010] Preferably, the thickness of the protrusion is less than or equal to half the thickness of the gate.

[0011] Preferably, the runner is horizontally arranged, and the gate is inclined to the runner; during mold opening, the protrusion cooperates with the weak area to vertically limit and lock the solidified material in the runner.

[0012] Preferably, the top end of the gate is connected to the cavity, and the bottom end of the gate is connected to the runner.

[0013] Preferably, the angle between the gate and the runner is θ, where 90° < θ ≦ 100°.

[0014] Compared with the prior art, the beneficial effects of this application are as follows: This invention features a weak zone at the solidified material in the product's flow channel, allowing workers to forcibly separate the product from the flow channel through this weak zone. This can be achieved by breaking the product or tearing it off by hand, greatly simplifying the separation process, reducing operational difficulty, and ensuring that the separation location is determined based on the weak zone. This, in turn, improves overall production efficiency and product quality. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the existing product structure.

[0016] Figure 2 This is a schematic diagram of the structure of the flow channel with a notch in the condensate section of this utility model.

[0017] Figure 3 This is a cross-sectional structural diagram of the mold body of this utility model.

[0018] Figure 4 For the present utility model Figure 3 A magnified schematic diagram of a portion of the structure.

[0019] In the diagram: 1. Product body; 2. Runner solidified material; 3. Notch; 4. Mold body; 401. Upper mold; 402. Lower mold; 5. Runner; 6. Gate; 7. Cavity; 8. Protrusion. Detailed Implementation

[0020] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0021] In the description of this application, it should be noted that the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., which indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of this application.

[0022] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0023] One preferred embodiment of this application, such as Figures 1 to 4 As shown, an injection molded product that facilitates the removal of runners includes a product body 1 and several runner solids 2 integrally disposed outside the product body 1, with a weak area at the connection between the runner solids 2 and the product body 1.

[0024] Understandably, after the product body 1 completes the injection molding process, in order to ensure the product's integrity and functionality, the excess runner material 2 must be completely separated from the product body 1. However, under current technological conditions, this separation process is usually achieved through manual trimming. This requires workers to have extremely precise control over the specific trimming location during the trimming process; this process is prone to human error, resulting in a high product scrap rate.

[0025] This design incorporates a weak zone at the connection between the runner material 2 and the product body 1. This weak zone is specifically designed to address the separation requirements of the runner material 2 and the product body 1, ensuring that the separation position is pre-set and predetermined, thus avoiding the arbitrariness and uncertainty of position selection during manual trimming. More importantly, workers can easily use this weak zone to forcibly separate the runner material 2 from the product body 1. The specific operation method can be to directly break the runner material 2 or remove it by hand, completely eliminating the need for traditional trimming methods. This not only greatly simplifies the separation process and reduces operational difficulty but also significantly improves the yield rate during separation, effectively reducing the risk of product scrap, thereby improving overall production efficiency and product quality.

[0026] As a further description of the above embodiments: such as Figure 2As shown, the channel condensate 2 has a notch 3 on the outer side of its end near the product body 1. The notch 3 extends along the width of the channel condensate 2 to form the aforementioned weak area. Due to the presence of the notch 3, the thickness of the corresponding part of the channel condensate 2 is significantly reduced, and its strength is also reduced accordingly. Therefore, when removing the channel condensate 2, it can be bent and broken through the notch 3 or torn by hand, making the operation simple and efficient. Furthermore, the design of the notch 3 provides a clear breaking point for the channel condensate 2 during separation, further ensuring the accuracy and consistency of the separation.

[0027] Furthermore, such as Figure 2 As shown, the vertical cross-section of the notch 3 has a "V" shape. Specifically, the pointed end of the "V" shape, due to its special geometry, is more prone to stress concentration when subjected to external force. This provides a strong point of application for workers during the removal of the channel condensate 2, making it easier for the channel condensate 2 to break at the notch 3, further improving the convenience and efficiency of removing the channel condensate 2. If the notch 3 adopts a C-shaped arc structure, stress dispersion will occur when subjected to external force, which is not conducive to the breakage of the channel condensate 2.

[0028] Another aspect of this application provides a mold for forming the aforementioned injection-molded product with easily removable runners, comprising a mold body 4 and runners 5, a gate 6, and a cavity 7 disposed within the mold body 4 and connected in sequence. It should be understood that molten injection molding liquid enters the cavity 7 from the runners 5 and the gate 6. The gate 6 is the connection between the runners 5 and the product cavity 7, and its channel cross-section is extremely small, serving as the last passageway before the molten material enters the cavity 7. Therefore, a protrusion 8 can be provided on the inner side of the gate 6, thereby forming the aforementioned weak area (or gap 3) after the molten material in the runners 5 solidifies.

[0029] It should be further explained that, since the gate 6 is smaller than the runner 5, the solidified molten material in both the gate 6 and the runner 5 is collectively referred to as the runner solidified material 2. In mold products, for the sake of brevity, the runner solidified material 2 outside the product body 1 is often also referred to as the runner 5 outside the product body 1. Therefore, removing the description of the external runner 5 essentially means removing the external runner solidified material 2.

[0030] Furthermore, such as Figure 4 As shown, the thickness of the protrusion 8 is preferably less than or equal to half the thickness of the gate 6. This is because the gate 6 itself has a small cross-sectional area, so the thickness of the protrusion 8 should not be too large to avoid excessive obstruction to the flow of the injection molding liquid. Under the premise of ensuring the formation of a weak area, the smaller the thickness of the protrusion 8, the smaller the impact on the flow of the injection molding liquid, which is conducive to ensuring the molding quality of the injection molded product.

[0031] Furthermore, such as Figure 4 As shown, the runner 5 is horizontally positioned, while the gate 6 is inclined to the runner 5. Specifically, the mold body 4 includes an upper mold 401 and a lower mold 402 positioned vertically, and the protrusion 8 is located inside the gate 6. Therefore, after molding, the weak area of ​​the product (i.e., the notch 3) and the protrusion 8 will cooperate in the vertical direction to form a structure similar to an "inverted" structure. For example, after the upper mold 401 moves vertically upward to open the mold, the solidified material 2 in the runner can be kept locked under the action of the "inverted" structure, thereby preventing the solidified material 2 in the runner from sticking to the mold 401 and thus improving the quality of the finished product.

[0032] It should be noted that if the gate 6 also adopts a horizontal structure with the runner 5, then the protrusion 8 will also be a horizontal structure. In this case, it will not be able to lock the solidified material 2 in the vertical direction when the mold is opened. Of course, after the mold is opened, the solidified material 2 can be forcibly ejected from the mold by the ejector pin mechanism of the mold.

[0033] like Figure 4 As shown, the top of gate 6 is connected to cavity 7, and the bottom of gate 6 is connected to runner 5. This means that the molten material enters cavity 7 from bottom to top, allowing air within cavity 7 to be continuously and smoothly pushed to the preset venting position at the top, thus improving molding quality. Furthermore, the protrusion 8 narrows the gate 6 channel, increasing the molten material shear rate; and during cooling and molding, the molten material here solidifies rapidly, with the protrusion 8 forming a physical barrier to prevent backflow of molten material within cavity 7.

[0034] Furthermore, such as Figure 4 As shown, the angle between the gate 6 and the runner 5 is θ, where 90° < θ ≦ 100°. It should be noted that the angle between the gate 6 and the runner 5 cannot be less than 90°, otherwise it will interfere with the mold closing of the upper mold 401 and the lower mold 402. If the angle is 90° (i.e., perpendicular), it is clear that the locking force of the protrusion 8 and the weak area on the solidified material 2 in the runner in the vertical direction is the greatest, which may cause difficulties in subsequent demolding. Furthermore, the vertical arrangement easily leads to high-speed jetting of molten material impacting the inner wall of the cavity 7, forming serpentine patterns or air marks; thus affecting the molding quality of the injection molded product. If the angle is too large, for example, θ is 120°, it will increase the flow path at gate 6, thus preventing the melt from efficiently transferring pressure to the end. In addition, the fit between the protrusion 8 and the weak area will weaken the locking force of the runner solidified material 2 in the vertical direction, which may cause the runner solidified material 2 to easily fall off when the mold is opened. Therefore, the included angle θ is preferably set to 90° < θ ≦ 100°. Of course, in actual design, those skilled in the art can flexibly adjust the specific angle θ according to the actual situation to meet different production needs and molding conditions.

[0035] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. An injection-molded product with easily removable runners, comprising a product body and a plurality of runners integrally disposed on the exterior of the product body, characterized in that: The connection between the flow channel condensate and the product body has a weak zone, and the flow channel condensate is adapted to be forcibly separated from the product body through the weak zone.

2. The injection-molded product with easily removable runners as described in claim 1, characterized in that: The flow channel slurry has a notch on the outer side of its end near the product body, and the notch extends along the width direction of the flow channel slurry, thereby forming the weak area.

3. The injection-molded product with easily removable runners as described in claim 2, characterized in that: The vertical cross-section of the notch has a "V" shape.

4. A mold for forming an injection-molded product as described in any one of claims 1-3, characterized in that, It includes a mold body and a runner, a gate, and a cavity arranged in sequence within the mold body. The gate has a protrusion on its inner side for forming the weak area.

5. The mold as described in claim 4, characterized in that: The thickness of the protrusion is less than or equal to half the thickness of the gate.

6. The mold as described in claim 4, characterized in that: The runner is horizontally arranged, and the gate is inclined to the runner; when the mold is opened, the protrusion cooperates with the weak area to limit and lock the solidified material in the runner in the vertical direction.

7. The mold as described in claim 4, characterized in that: The top end of the gate is connected to the cavity, and the bottom end of the gate is connected to the runner.

8. The mold as described in claim 7, characterized in that: The angle between the gate and the runner is θ, where 90° < θ ≦ 100°.

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