Injection molding side glue inlet pouring gate structure
By designing the injection-injection gate structure on the injection molding side, the end gate section and the cavity form steps, solving the problem of gate residue, and achieving easy separation and residue-free plastic parts.
Patent Information
- Application Number
- CN202422309622.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-23
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-09-23
AI Technical Summary
When existing injection molds form thin sheet plastic parts with larger widths, the plastic parts at the gate cannot be separated by themselves. They need to be broken off manually and leave obvious residues, which require secondary processing.
The injection-molded gate structure is adopted, and the end gate section is designed as a ridge-shaped platform to form a step and cavity parting surface. The molten plastic forms pre-break marks in the cavity, which facilitates the separation of the plastic parts and gates.
The plastic parts and gates are easy to separate, without residue, reducing manual operation burden and avoiding secondary processing.
Smart Images
Figure CN223115742U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of injection molding, and more specifically, to an injection molding side-gating structure. Background Art
[0002] With the progress of technology, plastic parts are used more and more. Plastic parts are formed by injecting molten plastic into an injection mold through an injection molding machine. When molding a thin sheet-shaped plastic part with a large width, a fan gate and a side gate are often used for gating.
[0003] However, after the fan gate and the side gate are molded, the plastic part at the gate position of the sprue cannot be separated by itself, and workers need to manually break off the plastic part. At the same time, obvious gate residues will be left on the product, and workers need to use tools to process the gate position of the product flat. Summary of the Utility Model
[0004] In view of the above defects of the prior art, an injection molding side-gating structure is provided.
[0005] The technical solution adopted by the utility model to solve its technical problems is: an injection molding side-gating structure, including a runner gate section communicated with a runner. The end of the runner gate section is provided with a frustum-shaped end gate section. One end of the end gate section is communicated with the runner gate section, and the end of the end gate section far from the runner gate section is communicated with the cavity of the mold. A step is formed between the end gate section and the parting surface of the cavity.
[0006] Preferably, the end gate section is a regular quadrangular frustum structure, and chamfers are provided at four side edges of the end gate section.
[0007] Preferably, the chamfer is a round chamfer.
[0008] Preferably, the lower bottom surface of the end gate section is communicated with the runner gate section. The upper bottom surface of the end gate section includes a communicating part and a stepped part. The communicating part is communicated with the cavity of the mold, and a step is formed between the stepped part and the parting surface of the cavity.
[0009] Preferably, the surface area ratio of the communicating part to the stepped part is 5:2.
[0010] Preferably, the cross section of the runner gate section is circular.
[0011] The beneficial effects of the present utility model are as follows: The molten plastic enters the cavity of the mold through a part of the end gate section to form a plastic part. At the same time, the molten plastic also passes through another part of the end gate section, causing a step difference to form between the formed gate and the plastic part. This step difference is the pre-breaking mark of the gate and the plastic part, which enables the plastic part to be easily separated from the gate, reducing the burden on workers to break off the plastic part. Moreover, there is no gate residue after the plastic part is separated from the gate, eliminating the need for secondary processing to remove the gate residue. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present utility model;
[0013] Figure 2 is an embodiment of the present utility model Figure 1 magnified schematic diagram of area A in the figure.
[0014] Reference numerals: 1 runner gate section, 2 end gate section, 20 chamfer, 21 connecting part, 22 step part, 3 runner. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0015] In order to make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model. In addition, the directional terms mentioned in the present utility model, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc., are only references to the directions of the attached drawings. The directional terms used are for better and clearer description and understanding of the present utility model, rather than indicating or implying the azimuth that the present utility model must have. Therefore, they should not be construed as limitations on the present utility model.
[0016] As shown in the embodiment of the present utility model Figures 1 to 2 in the figure, an injection molding side-gating structure includes a runner gate section 1 communicating with a runner 3. The end of the runner gate section 1 is provided with a frustum-shaped end gate section 2, that is, the end gate section 2 is arranged at one end of the runner gate section 1 close to the mold cavity. One end of the end gate section 2 is connected and communicated with the runner gate section 1, and the end of the end gate section 2 far from the runner gate section 1 is connected and communicated with the cavity of the mold. The end gate section 2 forms a step with the parting surface of the cavity, that is, the upper part of one end of the end gate section 2 is higher than the parting surface.
[0017] The molten plastic enters the cavity of the mold through a part of the end gate section 2 to form a plastic part. At the same time, the molten plastic also passes through another part of the end gate section 2, so that a step difference is formed between the formed gate and the plastic part. This step difference is the pre-breaking mark of the gate and the plastic part, which makes it easy for the plastic part to separate from the gate, reducing the burden on workers to break off the plastic part. Moreover, there is no gate residue after the plastic part is separated from the gate, and no secondary processing is required to remove the gate residue.
[0018] Further improvements, such as Figure 1 and Figure 2 As shown in, the end gate section 2 is a regular quadrangular frustum structure. Chamfers 20 are provided at the four side edges of the end gate section 2. The chamfers 20 are rounded chamfers. The rounded chamfers not only make the gate easy to process, but also reduce the clamping force of the mold on the gate position, facilitating demolding.
[0019] Further improvements, such as Figure 1 and Figure 2 As shown in, the lower bottom surface of the end gate section 2 is connected to the runner gate section 1. The upper bottom surface of the end gate section 2 includes a communication part 21 and a step part 22. The communication part 21 is located below the step part 22. The communication part 21 is connected to the cavity of the mold. The step part 22 forms a step with the parting surface of the cavity. The surface area ratio of the communication part 21 to the step part 22 is 5:2. The molten plastic enters the cavity of the mold through the communication part 21 to form a plastic part, and the step part 22 makes a step difference be formed between the formed gate and the plastic part.
[0020] Further improvements, such as Figure 1 and Figure 2 As shown in, the cross-section of the runner gate section 1 is circular, that is, the runner gate section 1 is cylindrical, reducing the clamping force of the mold on the gate of the runner gate section 1 and facilitating the demolding of the gate of the runner gate section 1.
[0021] It should be understood that for those of ordinary skill in the art, improvements or transformations can be made according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of the present utility model.
Claims
1. An injection molding side-gating structure includes a runner gate section communicating with a runner; characterized in that, A frustum-shaped end gate section is provided at the end of the runner gate section; one end of the end gate section is in communication with the runner gate section; the end of the end gate section far from the runner gate section is in communication with the cavity of the mold; a step is formed between the end gate section and the parting surface of the cavity.
2. The injection molding side-gating structure according to claim 1, characterized in that, The end gate section is a regular quadrangular frustum structure; chamfers are provided at the four side edges of the end gate section.
3. The injection molding side-gating structure according to claim 2, wherein, The chamfers are rounded chamfers.
4. The injection molding side-gating structure according to claim 1, wherein The lower bottom surface of the end gate section is in communication with the runner gate section; the upper bottom surface of the end gate section includes a communicating portion and a stepped portion; the communicating portion is in communication with the cavity of the mold; the stepped portion forms a step with the parting surface of the cavity.
5. The injection molding side-gating structure according to claim 4, wherein, The surface area ratio of the communicating portion to the stepped portion is 5:
2.
6. The injection molding side-gating structure according to claim 1, characterized in that, The cross-section of the runner gate section is circular.