Injection mold

Abstract

The utility model discloses an injection mold, which relates to the technical field of injection molds, and comprises a plurality of parting surfaces with runner surface sections, the plurality of runner surface sections jointly enclose to form a runner for melt glue to flow, in every two adjacent parting surfaces, an accommodating space is formed between other parts except the runner, the accommodating space is laterally communicated with the runner, and the runner is communicated with the accommodating space. By arranging a plurality of parting surfaces, a plurality of runner surface sections can jointly define the runner for the flowing of the melt glue, and meanwhile, by arranging the containing space capable of being communicated with the runner, the melt glue in the runner can flow into the containing space and is solidified in the containing space, so that the melt glue in the runner can flow into the containing space, and the melt glue in the runner can be solidified in the containing space. According to the injection mold, the melt glue can seal the connecting seam between the two adjacent parting surfaces, so that the melt glue in the runner is prevented from permeating into the seam between the two adjacent parting surfaces to form burrs, and the problem that the burrs appear in the runner of the existing injection mold is solved.

Description

Technical Field

[0001] This utility model relates to the field of injection molding technology, and in particular to an injection mold. Background Technology

[0002] Currently, the runners in injection molds are usually designed on the parting surface. However, when the filling and holding pressure is too high, the mold parts that make up the parting surface will deform and create gaps. Molten plastic enters these gaps during the filling process and forms burrs. The burrs left on the parting surface will cause the mold to be damaged by pressure. Utility Model Content

[0003] The main purpose of this invention is to propose an injection mold that aims to solve the problem of burrs appearing in the runner of existing injection molds.

[0004] To achieve the above objectives, the injection mold proposed in this utility model includes multiple parting surfaces with runner segments. The runner segments of the multiple parting surfaces together form a runner for molten adhesive to flow. Between two adjacent parting surfaces, a receiving space is formed between the remaining portions outside the runner. The receiving space is laterally connected to the runner so that the molten adhesive in the runner can flow into the receiving space and solidify within the receiving space.

[0005] In one embodiment, at least one of the two adjacent parting surfaces further includes an extension segment connecting the flow channel segment, the extension segment extending laterally along the flow channel, so that the two adjacent parting surfaces can form a receiving groove.

[0006] The accommodating space includes the accommodating slot.

[0007] In one embodiment, the extended surface segment includes:

[0008] The first extension segment has one end connected to the flow channel surface segment and the other end extending laterally along the flow channel; and

[0009] The second extension segment has one end connected to the other end of the first extension segment, and the other end extends circumferentially along the flow channel.

[0010] In one embodiment, the length of the first extended segment is L1, wherein 0.8mm ≤ L1 ≤ 1.2mm.

[0011] In one embodiment, the length of the second extension segment is L2, wherein 0.5mm ≤ L2 ≤ 0.8mm.

[0012] In one embodiment, each of two adjacent parting surfaces is provided with the extended surface segment.

[0013] In one embodiment, the receiving slot is rectangular.

[0014] In one embodiment, the roughness of the flow channel is not less than the roughness of the accommodating space.

[0015] In one embodiment, the connecting seam between two adjacent parting surfaces is located in the middle of the accommodating space.

[0016] In one embodiment, each flow channel segment is arranged in an arc shape along the cross-section of the flow channel.

[0017] In the technical solution of this utility model, by setting multiple parting surfaces, multiple flow channel segments can jointly form a flow channel for the flow of molten adhesive. At the same time, by setting a receiving space that can connect the flow channel, the molten adhesive in the flow channel can flow into the receiving space and solidify in the receiving space. This allows the molten adhesive to seal the joint between two adjacent parting surfaces, preventing the molten adhesive in the flow channel from seeping into the gap between two adjacent parting surfaces and forming burrs. This solves the problem of burrs appearing in the flow channels of existing injection molds. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 A schematic diagram of the structure of an embodiment of the injection mold provided by this utility model;

[0020] Figure 2 for Figure 1 Another structural diagram of the injection mold in the image;

[0021] Figure 3 for Figure 1 Another structural schematic diagram of the injection mold in the image;

[0022] Figure 4 This is a schematic diagram of another embodiment of the injection mold provided by this utility model.

[0023] Explanation of icon numbers:

[0024] 100. Injection mold; 1. Parting surface; 11. Runner section; 12. Extension section; 121. First extension section; 122. Second extension section; 2. Runner; 3. Accommodating space; 31. Accommodating groove.

[0025] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0027] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0028] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0029] Currently, the runners in injection molds are usually designed on the parting surface. However, when the filling and holding pressure is too high, the mold parts that make up the parting surface will deform and create gaps. Molten plastic enters these gaps during the filling process and forms burrs. The burrs left on the parting surface will cause the mold to be damaged by pressure.

[0030] Based on this, this utility model proposes an injection mold designed to solve the problem of burrs appearing in the runners of existing injection molds. Among other things, Figures 1 to 4 A schematic diagram of the structure of the injection mold provided by this utility model.

[0031] Please see Figures 1 to 4In one embodiment of the present invention, the injection mold 100 includes a plurality of parting surfaces 1 having flow channel segments 11. The flow channel segments 11 of the plurality of parting surfaces 1 together form a flow channel 2 for the flow of molten adhesive. Between two adjacent parting surfaces 1, the remaining portions outside the flow channel 2 form an accommodating space 3. The accommodating space 3 is laterally connected to the flow channel 2 so that the molten adhesive in the flow channel 2 can flow into the accommodating space 3 and solidify in the accommodating space 3.

[0032] It should be noted that the parting surface 1 refers to the surface where the two halves of the injection mold 100 (usually called the moving mold and the fixed mold, or plate A and plate B) contact each other when closed. This surface is also where the product separates from the mold when the mold is opened to remove the molded product. The shape of the runner 2 can vary; for example, it can be circular, rectangular, or polygonal, etc., and this invention does not limit this. Furthermore, the number of parting surfaces 1 can be two, three, or four, as long as they can form the runner 2, and this invention does not limit this. Specifically, two parting surfaces 1 are provided. The runner is a channel for injecting molten adhesive into the cavity, i.e., an injection channel.

[0033] In the technical solution of this utility model, by setting multiple parting surfaces 1, multiple flow channel segments 11 can jointly form a flow channel 2 for the flow of molten adhesive. At the same time, by setting a receiving space 3 that can connect the flow channel 2, the molten adhesive in the flow channel 2 can flow into the receiving space 3 and solidify in the receiving space 3. This allows the molten adhesive to seal the connection seam between two adjacent parting surfaces 1, preventing the molten adhesive in the flow channel 2 from seeping into the gap between two adjacent parting surfaces 1 and forming burrs. This solves the problem of burrs appearing in the flow channel 2 of the existing injection mold 100.

[0034] In one embodiment of this utility model, please refer to Figure 3 and Figure 4 In at least one of the two adjacent parting surfaces 1, the parting surface 1 further includes an extension segment 12 connecting the flow channel segment 11. The extension segment 12 extends laterally along the flow channel 2 so that the two adjacent parting surfaces 1 can form a receiving groove 31. The receiving space 3 includes the receiving groove 31. Thus, by setting the extension segment 12, a receiving groove 31 with its opening facing the flow channel 2 can be formed between the two adjacent parting surfaces 1 so that the molten adhesive can flow in and solidify, thereby sealing the connection seam between the two adjacent parting surfaces 1. Further, the receiving space 3 can be of various types. In other embodiments, the receiving space 3 can also be a receiving cavity, etc., and this utility model does not limit it in this way.

[0035] It should be noted that at least one of the parting surfaces 1 also includes an extension segment 12 connecting the flow channel segment 11. This means that in two adjacent parting surfaces 1, only one parting surface 1 may have the extension segment 12, or both parting surfaces 1 may have the extension segment 12 simultaneously. This utility model does not limit this. The lateral extension of the extension segment 12 means that the extension segment 12 may extend parallel to the radial direction of the flow channel 2, or it may extend at a certain angle to the radial direction of the flow channel 2. This utility model does not limit this.

[0036] It should also be noted that the extended surface segment 12 can be arranged in various forms. Specifically, on the cross-section of the flow channel 2, the extended surface segment 12 can be arranged in an arc shape, an oblique line, or a bend, etc., as long as it can form the receiving groove 31 between the two connected parting surfaces 1. This utility model does not limit this.

[0037] Furthermore, in one embodiment of this utility model, please refer to... Figure 4 The extended surface segment 12 includes a first extended segment 121 and a second extended segment 122. One end of the first extended segment 121 is connected to the flow channel surface segment 11, and the other end extends radially along the flow channel 2. One end of the second extended segment 122 is connected to the other end of the first extended segment 121, and the other end extends circumferentially along the flow channel 2. Thus, by setting the first extended segment 121 to connect with the flow channel 2 segment, the molten adhesive can flow along the first extended segment 121. By setting the second extended segment 122, the extended surface segment 12 can share the mounting groove with another parting surface 1.

[0038] Furthermore, if the first extension segment 121 is too short, the molten adhesive will not easily solidify in the mounting groove. Conversely, if the first extension segment 121 is too long, the molten adhesive may solidify before it reaches the end of the first extension segment 121, resulting in the molten adhesive not filling the mounting groove. Therefore, in this embodiment, the length of the first extension segment 121 is L1, where 0.8mm≤L1≤1.2mm, which ensures that the molten adhesive can solidify in the mounting groove and fill the mounting groove completely.

[0039] It is understood that the length of the first extension segment 121 can be any value between 0.8mm and 1.2mm, such as 0.85mm, 0.9mm, 0.95mm, 1mm, 1.05mm, 1.1mm, 1.15mm, etc., all of which are within the protection scope of this utility model. Further, in this embodiment, L1 = 1mm.

[0040] If the second extension segment 122 is too short, the molten adhesive will not flow easily along the first extension segment 121. Conversely, if the second extension segment 122 is too long, the molten adhesive contained in the mounting groove will be too large, making it difficult for the molten adhesive to solidify within the receiving groove 31. Therefore, in this embodiment, the length of the second extension segment 122 is L2, where 0.5mm ≤ L2 ≤ 0.8mm. This facilitates the flow of the molten adhesive along the first extension segment 121, allowing the molten adhesive to fill the mounting groove, while also preventing the molten adhesive from failing to solidify within the mounting groove due to its excessive size. It is understood that the length of the second extension segment 122 can be any value between 0.5mm and 0.8mm, such as 0.55mm, 0.6mm, 0.65mm, 0.7mm, 0.75mm, etc., all of which are within the protection scope of this utility model. Further, in this embodiment, L2 = 0.65mm.

[0041] In some embodiments, each of the two adjacent parting surfaces 1 is provided with the extended surface segment 12, so that the connecting seam between the two adjacent parting surfaces 1 is located in the middle of the receiving groove 31, which can effectively improve the sealing effect of the molten adhesive.

[0042] The shape of the receiving groove 31 can be various, such as circular, polygonal, or rectangular. This utility model does not limit this. Specifically, in this embodiment, the receiving groove 31 is rectangular. Compared with circular or other shapes, the cross-sectional area of ​​a rectangle is relatively large, which makes the volume of the mounting groove larger, thus facilitating the holding of more molten adhesive.

[0043] In one embodiment of this utility model, the roughness of the flow channel 2 is not less than the roughness of the accommodating space 3. Thus, the accommodating space adopts a smaller roughness, which facilitates the flow of molten adhesive in the mounting groove, thereby enabling the molten adhesive to fill the accommodating space 3.

[0044] The relative position of the connecting seam between two adjacent parting surfaces 1 and the accommodating space 3 can vary. The connecting seam between two adjacent parting surfaces 1 can be located on the side of the accommodating space 3 or in the middle of the accommodating space 3, etc. This utility model does not limit this. Specifically, in this embodiment, the connecting seam between two adjacent parting surfaces 1 is located in the middle of the accommodating space 3. Since the connecting seam between two adjacent parting surfaces 1 is located on the side edge of the accommodating space 3, it would cause the connecting seam to communicate with the mounting groove and the molten adhesive in the gap along the radial direction of the flow channel 2, which would affect the sealing effect of the molten adhesive. Therefore, the connecting seam between two adjacent parting surfaces 1 is located in the middle of the accommodating space 3 to prevent the connecting seam between two adjacent parting surfaces 1 from communicating with the mounting groove and the molten adhesive in the gap along the radial direction of the flow channel 2, thereby helping to improve the sealing effect of the molten adhesive and reduce the probability of burrs appearing in the flow channel 2.

[0045] In one embodiment of this utility model, please refer to Figure 2 and Figure 3 Along the cross-section of the flow channel 2, each flow channel segment 11 is arranged in an arc shape to form a circular or near-circular flow channel. Compared with other shapes, on the one hand, the cross-sectional area of ​​a circular or near-circular flow channel is larger, resulting in less resistance and higher flow efficiency during melt flow; on the other hand, a circular or near-circular flow channel has no dead corners, allowing for smooth melt flow and reducing stagnation. Of course, in other embodiments, the flow channel may also be rectangular, and this invention does not limit this to that.

[0046] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An injection mold characterized in that, The mold includes a plurality of parting surfaces with runner surface sections, the runner surface sections of the plurality of parting surfaces collectively forming a runner for the flow of the molten glue, and a remaining portion of each of the plurality of parting surfaces outside the runner forms a receiving space, the receiving space being laterally connected to the runner so that the molten glue in the runner can flow into the receiving space and solidify in the receiving space.

2. The injection mold of claim 1, wherein, At least one of the parting surfaces of the two adjacent parting surfaces further includes an extension surface section connecting the runner surface sections, the extension surface section extending laterally along the runner so that the two adjacent parting surfaces form a receiving groove. The receiving space includes the receiving groove.

3. The injection mold of claim 2, wherein, The extension surface section includes: a first extension section having one end connected to the runner surface section and the other end extending laterally along the runner; and a second extension section having one end connected to the other end of the first extension section and the other end extending circumferentially along the runner.

4. The injection mold of claim 3, wherein The first extension section has a length L1, where 0.8 mm ≤ L1 ≤ 1.2 mm.

5. The injection mold of claim 3, wherein, The second extension section has a length L2, where 0.5 mm ≤ L2 ≤ 0.8 mm.

6. The injection mold of claim 2, wherein, Each of the parting surfaces of the two adjacent parting surfaces is provided with the extension surface section.

7. The injection mold of claim 2, wherein, The receiving groove is rectangularly arranged.

8. The injection mold of claim 1, wherein, The roughness of the runner is not less than the roughness of the receiving space.

9. The injection mold of claim 1, wherein, The joint between the two adjacent parting surfaces is in the middle of the receiving space.

10. The injection mold of claim 1, wherein, In a cross section along the runner, each of the runner surface sections is arcuately arranged.

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