An S-shaped curved runner type plastic mold

Abstract

This utility model discloses an S-shaped curved runner plastic mold, including a plastic mold core, two plastic cavities disposed on the plastic mold core, a plastic runner, an injection port, and a venting channel. The portions of the plastic runner located on both sides of the injection port are curved in opposite directions to form an S-shaped structure. This utility model replaces the existing straight-through structure with an S-shaped plastic runner, which has advantages such as uniform flow resistance, smoother flow, and improvement of air marks on the molded product caused by poor venting.

Description

Technical Field

[0001] This utility model belongs to the field of plastic molding, and relates to plastic molds, specifically to an S-shaped curved flow channel plastic mold. Background Technology

[0002] Plastic molds are molds used to shape plastic products, such as... Figure 1 As shown, it mainly includes a plastic mold core 1, two plastic cavities 2 disposed on the plastic mold core 1, plastic runners 3 connecting the two plastic cavities 2 respectively, an injection port 4 connected to the plastic runners 3, and an venting channel 5 connected to the plastic runners 3 for venting. In existing plastic molds, the plastic runners 3 adopt a straight-through structure. Molten plastic enters the plastic runners 3 through the injection port 4, and then flows into the two plastic cavities 2 respectively to achieve injection molding.

[0003] In practical applications, this type of plastic mold has some problems, as follows:

[0004] 1. The straight-through plastic flow channel 3 is prone to uneven resistance at the corners, which will lead to uneven overall flow of molten plastic and affect the filling effect of molten plastic in the plastic cavity 2.

[0005] 2. The straight-through plastic flow channel 3 causes the molten plastic to flow too fast in some areas, which can lead to defects such as jetting patterns in the molded product due to excessive flow speed, thus affecting the molding effect.

[0006] 3. The straight-through structure of the plastic flow channel 3 makes the flow of molten plastic ineffective in dispersing and venting gas within the plastic flow channel 3, which can easily lead to air bubbles in the molded product and affect the quality of the molded product. Summary of the Invention

[0007] Purpose of the invention: In order to overcome the shortcomings of the existing technology, an S-shaped curved flow channel plastic mold is provided.

[0008] Technical solution: To achieve the above objectives, this utility model provides an S-shaped curved flow channel plastic mold, including a plastic mold core, two plastic cavities disposed on the plastic mold core, a plastic flow channel, an injection port, and an exhaust channel. The portions of the plastic flow channel located on both sides of the injection port are bent in opposite directions to form an S-shaped structure.

[0009] Furthermore, the two curved sections of the plastic flow channel have the same curvature.

[0010] Furthermore, the cross-sections of the two curved sections of the plastic flow channel are both semi-circular structures.

[0011] Furthermore, the exhaust channel is located on the outer arc surface of the two curved sections of the plastic flow channel.

[0012] Furthermore, the exhaust channel is located at the outermost point near the bend, thereby maximizing the exhaust effect.

[0013] Beneficial effects: Compared with the prior art, this utility model replaces the existing straight-through structure with an S-shaped plastic flow channel, which has the following advantages:

[0014] 1. The curved structure of the S-shaped flow channel can evenly distribute the resistance encountered by the melt during flow, preventing uneven resistance at corners. The uniform resistance within the flow channel allows for better control of the molding pressure, thereby ensuring the consistency of the molded products and providing better assurance of molding quality.

[0015] 2. The curved flow channel structure can reduce the flow rate of molten plastic, making the molten plastic flow more smoothly and evenly. It reduces the friction of molten plastic in the flow channel, making the flow better and smoother, and helps to reduce undesirable phenomena such as jetting caused by excessive flow rate.

[0016] 3. Due to the structure of the S-shaped flow channel, the molten plastic has an outward force when flowing, which not only can better disperse the gas, but also facilitates the gas in the plastic flow channel to be vented through the venting channel, thus improving the situation of air marks on the molded product caused by poor venting. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an existing straight-through type runner plastic mold;

[0018] Figure 2 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0019] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0020] like Figure 2 As shown, this utility model provides an S-shaped curved runner plastic mold, including a plastic mold core 1, two plastic cavities 2 disposed on the plastic mold core 1, a plastic runner 3, an injection port 4, and four venting channels 5. The portions of the plastic runner 3 located on both sides of the injection port 4 are curved in opposite directions to form an S-shaped structure. The two curved portions of the plastic runner 3 have the same curvature. The cross-sections of the two curved portions of the plastic runner 3 are both semi-circular structures. The four venting channels 5 are respectively disposed in pairs on the outer arc surfaces of the two curved portions of the plastic runner 3. The venting channels 5 are located near the outermost point of the curved portion.

[0021] This utility model applies the aforementioned S-shaped curved flow channel plastic mold to the injection molding of products, as detailed below:

[0022] Molten plastic enters the plastic flow channel 3 through the injection port 4, and then flows towards the two plastic cavities 2 in the plastic flow channel 3. During the flow, the flow force of the molten plastic is used to simultaneously expel the gas in the plastic flow channel 3 through the exhaust channel 5. The molten plastic continuously fills the plastic cavity 2 through the plastic flow channel 3 until it is completely filled, and finally the product is formed in the plastic cavity 2.

[0023] In this invention, an S-shaped plastic flow channel replaces the existing straight-through structure, which has the following advantages:

[0024] 1. The curved structure of the S-shaped flow channel can evenly distribute the resistance encountered by the melt during flow, preventing uneven resistance at corners. The uniform resistance within the flow channel allows for better control of the molding pressure, thereby ensuring the consistency of the molded products and providing better assurance of molding quality.

[0025] 2. The curved flow channel structure can reduce the flow rate of molten plastic, making the molten plastic flow more smoothly and evenly. It reduces the friction of molten plastic in the plastic flow channel 3, making the flow better and smoother, and helps to reduce undesirable phenomena such as jetting caused by excessive flow rate.

[0026] 3. Due to the structure of the S-shaped flow channel, the molten plastic has an outward force when flowing, which not only can better disperse the gas, but also facilitates the gas in the plastic flow channel 3 to be vented through the venting channel 5, thus improving the situation where air marks appear on the molded product due to poor venting.

Claims

1. An S-shaped curved runner type plastic mold, comprising a plastic mold core, two plastic cavities disposed on the plastic mold core, a plastic runner, an injection port, and a venting channel, characterized in that, The plastic flow channel is located on both sides of the injection port, and the portions are bent in opposite directions to form an S-shaped structure.

2. The S-shaped curved flow channel type plastic mold according to claim 1, characterized in that, The two curved sections of the plastic flow channel have the same curvature.

3. The S-shaped curved flow channel type plastic mold according to claim 2, characterized in that, The cross-sections of the two curved sections of the plastic flow channel are both semi-circular.

4. The S-shaped curved flow channel type plastic mold according to claim 1, characterized in that, The exhaust channel is located on the outer arc surface of the two curved sections of the plastic flow channel.

5. The S-shaped curved runner type plastic mold according to claim 4, characterized in that, The exhaust passage is located at the outermost point near the bend.

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