Eight-cavity injection mold balanced in glue feeding

Abstract

The utility model relates to the technical field of injection molds, in particular to an eight-cavity injection mold balanced in glue feeding, which comprises a bottom plate and a top plate, a heating plate is fixedly connected to the lower surface of the top plate, an upper mold plate is fixedly connected to the lower surface of the heating plate, and an upper mold core is embedded in the upper mold plate. Two symmetrical mold corners are fixedly connected to the bottom plate, a lower mold plate matched with the upper mold plate is fixedly connected to the tops of the mold corners, a lower mold core is embedded in the upper mold plate, and when the upper mold plate and the lower mold plate are closed, a cavity for injection molding can be formed in the upper mold core and the lower mold core. The opposite sides of the two mold corners extend inwards to form skirt edges, and the skirt edges are located below the lower mold core. According to the utility model, through the matching of related structures, the center and the edge of the lower mold core can be in the same flatness in the injection molding process, so that the glue feeding speed at the center of the lower mold core is the same as the glue feeding speed at the edge in the injection molding process, and the injection molding quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an eight-cavity injection mold with balanced glue feeding. Background Art

[0002] Injection molds are the main tools used to mold plastic products. They can mass-produce plastic products of exactly the same shape and size more quickly and efficiently. For many products, injection molds are important tools necessary for them to produce various plastic products, such as: plastic parts on cars, medical products, industrial electronic products, etc. The plastic products they produce with injection molds have the advantages of light weight, high strength, good toughness, corrosion resistance, good insulation, easy coloring, easy molding, low cost, etc., so they are favored by all walks of life. A multi-cavity injection mold refers to a mold that contains multiple cavities (Cavities) and can produce multiple identical or different plastic products at the same time.

[0003] For example, Chinese patent publication number CN109130093A discloses a hot runner injection mold, and another Chinese patent publication number CN218948339U discloses an injection mold for a switch panel.

[0004] The mold angles set in the injection molds in the above two comparative documents can only support the lower mold plate. The mold angles are not located directly below the lower mold core, so the mold angles cannot support the lower mold core. The lower mold core is supported only by the lower mold plate. During the injection molding process, the center of the lower mold core is subjected to a larger injection force, and the center of the lower mold core tends to be concave downward, causing the glue to flow faster in the center of the lower mold core and slower at the edge, resulting in uneven glue flow and reducing the injection molding quality of the model. Utility Model Content

[0005] In view of this, the purpose of the utility model is to propose an eight-cavity injection mold with balanced glue feeding, so as to solve the problem that in the existing injection mold, the center position of the lower mold core is subjected to a large injection force during the injection molding process, and has a tendency to be concave downward, so that the glue feeds faster at the center of the lower mold core and slower at the edge, resulting in uneven glue feeding and reducing the injection molding quality of the model.

[0006] Based on the above purpose, the utility model provides an eight-cavity injection mold with balanced glue feeding, including a bottom plate and a top plate, a heating plate is fixedly connected to the lower surface of the top plate, and an upper mold plate is fixedly connected to the lower surface of the heating plate, an upper mold core is embedded in the upper mold plate, two symmetrical mold angles are fixedly connected to the bottom plate, a lower mold plate adapted to the upper mold plate is fixedly connected to the top of the mold angle, a lower mold core is embedded in the upper mold plate, and when the upper mold plate and the lower mold plate are molded together, the interiors of the upper mold core and the lower mold core can form a cavity for injection molding;

[0007] The opposite sides of the two mold corners are extended inward with skirts, and the skirts are located below the lower mold core and can support the lower mold core. A supporting part is provided between two adjacent skirts, and the supporting part is located directly below the center position of the lower mold core, so that the supporting part can support the injection center of the lower mold core during injection molding.

[0008] Preferably, the skirt is two arc-shaped plates, and there is a gap between the two arc-shaped plates.

[0009] Preferably, the skirt is a straight plate arranged along the length direction of the mold angle.

[0010] Preferably, the support portion comprises a support ring, the support ring is located directly below the center of the lower mold core, a plurality of connecting rods are fixedly connected to the support ring, and one end of the connecting rod away from the support ring is fixedly connected to the skirt.

[0011] Preferably, the support ring is a circular ring or a square ring.

[0012] Preferably, the connecting rod and the supporting ring are arranged as an integrally formed structure.

[0013] The beneficial effects of the utility model: the utility model provides an eight-cavity injection mold with balanced glue feeding, which can support the center of the lower mold core through the arrangement of the skirt and the support part, so that the center and the edge of the lower mold core can be at the same flatness during the injection molding process, and the glue feeding speed at the center of the lower mold core is the same as the glue feeding speed at the edge during the injection molding process, thereby improving the injection molding quality and avoiding the problem that the center of the lower mold core is subjected to a large injection force and has a tendency to concave downward, resulting in uneven glue feeding at the center and edge of the lower mold core, thereby affecting the injection molding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0016] Figure 2 A cross-sectional view of an embodiment of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the template, the mold angle and the support part in the embodiment of the utility model;

[0018] Figure 4 For the utility model embodiment Figure 3 Explosion structure schematic diagram.

[0019] In the figure: 1, bottom plate; 2, top plate; 3, heating plate; 4, upper template; 5, die angle; 6, lower template; 7, lower die core; 8, upper die core; 9, skirt; 10, support part; 101, support ring; 102, connecting rod. Specific embodiments

[0020] In order to make the purpose, technical solutions and advantages of the present utility model clearer and more understandable, the following further elaborates on the present utility model in detail in conjunction with specific embodiments and with reference to the accompanying drawings.

[0021] It should be noted that unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present utility model should have the ordinary meaning understood by those with ordinary skills in the field to which the present utility model belongs. The "first", "second" and similar terms used in the present utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. The words such as "including" or "comprising" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. The words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The "upper", "lower", "left", "right", etc. are only used to represent relative position relationships, and when the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0022] As Figure 1 , Figure 2 , Figure 3 , Figure 4 shown, an eight-cavity injection mold with balanced glue injection includes a bottom plate 1 and a top plate 2. A heating plate 3 is fixedly connected to the lower surface of the top plate 2. Structures such as ejector pins, support columns and guide shafts (not shown in the figure) are also provided on the bottom plate 1, which belong to the existing conventional technologies, and this application does not make improvements to the mold body, only improves the die angle 5, and the lower surface of the heating plate 3 is fixedly connected to an upper template 4. An upper die core 8 is embedded in the upper template 4. Two symmetric die angles 5 are fixedly connected to the bottom plate 1. The top of the die angle 5 is fixedly connected to a lower template 6 adapted to the upper template 4. A lower die core 7 is embedded in the lower template 6. When the upper template 4 and the lower template 6 are clamped, cavities for injection molding can be formed inside the upper die core and the lower die core 7;

[0023] The opposite sides of the two mold corners 5 are extended inward with skirts 9, and the skirts 9 are located below the lower mold core 7 to support the lower mold core 7. A support portion 10 is provided between two adjacent skirts 9, and the support portion 10 is located directly below the center position of the lower mold core 7, so that the support portion 10 can support the injection center of the lower mold core 7 during injection molding.

[0024] The existing mold angle 5 only supports the lower mold plate 6 but does not support the lower mold core 7. The support of the lower mold core 7 depends entirely on the lower mold plate 6, so that during the injection molding process, the injection force at the center of the lower mold core 7 is relatively large, and there is a tendency to be concave downward, which leads to uneven glue feeding at the center and edge of the lower mold core 7, thus affecting the injection molding quality. The present application sets a skirt 9, and the skirt 9 is located directly below the lower mold core 7, so that the skirt 9 can support the lower mold core 7 while supporting the lower mold plate 6, that is, the mold angle 5 can support the lower mold core 7, and through the setting of the support part 10, the center of the lower mold core 7 can be supported, so that during the injection molding process, the center and edge of the lower mold core 7 can be at the same flatness, so that the glue feeding speed at the center of the lower mold core 7 and the glue feeding speed at the edge are the same during the injection molding process, thereby improving the injection molding quality.

[0025] In a preferred embodiment of the present invention, the skirt 9 is composed of two arc-shaped plates, and there is a gap between the two arc-shaped plates.

[0026] In another preferred embodiment of the present invention, the skirt 9 is a straight plate arranged along the length direction of the mold angle 5.

[0027] The shape of the skirt 9 can also be a corrugated plate, a triangular plate, etc. The specific shape of the skirt 9 can be set according to the actual mold. Whether the shape of the skirt 9 is an arc plate or a straight plate, it can support the lower mold core 7. While the skirt 9 supports the lower mold plate 6, since the skirt 9 is located directly below the lower mold core 7, the skirt 9 can also support the lower mold core 7, thereby avoiding the center of the lower mold core 7 from being subjected to a large injection force and having a tendency to concave during injection molding.

[0028] In another preferred embodiment of the utility model, the support portion 10 includes a support ring 101, which is located directly below the center of the lower mold core 7. A plurality of connecting rods 102 are fixedly connected to the support ring 101, and one end of the connecting rod 102 away from the support ring 101 is fixedly connected to the skirt 9.

[0029] The support ring 101 is located directly below the lower mold core 7 and is fixed to the skirt 9 by a connecting rod 102, so that the support ring 101, the skirt 9 and the mold corner 5 can form a whole, so that the support ring 101, the skirt 9 and the mold corner 5 can all support the lower mold plate 6. Moreover, because the support ring 101 is located directly below the lower mold core 7, the support ring 101 can support the center of the lower mold core 7, thereby improving the structural strength of the lower mold core 7, so that the center and the edge of the lower mold core 7 can be at the same flatness during the injection molding process, so that the glue feeding speed at the center of the lower mold core 7 is the same as the glue feeding speed at the edge during the injection molding process, thereby improving the injection molding quality and avoiding the situation where the center of the lower mold core 7 is subjected to a large injection force and has a tendency to concave downward, resulting in uneven glue feeding at the center and edge of the lower mold core 7, thereby affecting the injection molding quality.

[0030] It should be noted that the support ring 101 is a circular ring or a square ring. By setting the support ring 101 as a circular ring or a square ring structure, obstruction to the support column on the base plate 1 is avoided, which facilitates the support column to pass through the support ring 101, and the specific size of the support ring 101 can be set according to the specific use of the mold, mainly so as not to hinder the normal use of the mold, and the number of connecting rods 102 can be two, three, four or more. This application takes four as an example. The number or shape of the connecting rods 102 can be determined according to the specific use of the specific injection mold, mainly so as not to hinder the operation of structures such as the ejector pin and the guide shaft.

[0031] It should be noted that the connecting rod 102 and the supporting ring 101 are provided as an integrally formed structure, and the stability of the relevant structure is improved by providing the integrally formed structure.

[0032] A person skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0033] The embodiments of the present invention are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An eight-cavity injection mold with balanced glue feeding, comprising a bottom plate (1) and a top plate (2), a heating plate (3) being fixedly connected to the lower surface of the top plate (2), and an upper mold plate (4) being fixedly connected to the lower surface of the heating plate (3), and an upper mold core (8) being embedded in the upper mold plate (4), characterized in that: Two symmetrical mold corners (5) are fixedly connected to the bottom plate (1); a lower mold plate (6) adapted to the upper mold plate (4) is fixedly connected to the top of the mold corners (5); a lower mold core (7) is embedded in the lower mold plate (6); when the upper mold plate (4) and the lower mold plate (6) are molded together, the interiors of the upper mold core and the lower mold core (7) can form a mold cavity for injection molding; The opposite sides of the two mold corners (5) are both provided with skirt edges (9) extending inwards, the skirt edges (9) being located below the lower mold core (7) and being capable of supporting the lower mold core (7), and a support portion (10) being provided between two adjacent skirt edges (9), the support portion (10) being located directly below the center position of the lower mold core (7) so that the support portion (10) can support the injection molding center of the lower mold core (7) during injection molding.

2. The eight-cavity injection mold with balanced glue feeding according to claim 1, characterized in that: The skirt (9) is composed of two arc-shaped plates, and there is a gap between the two arc-shaped plates.

3. The eight-cavity injection mold with balanced glue feeding according to claim 1, characterized in that: The skirt (9) is a straight plate arranged along the length direction of the mold angle (5).

4. The eight-cavity injection mold with balanced glue feeding according to claim 1, characterized in that: The support portion (10) comprises a support ring (101), the support ring (101) being located directly below the center of the lower mold core (7), a plurality of connecting rods (102) being fixedly connected to the support ring (101), and one end of the connecting rod (102) away from the support ring (101) being fixedly connected to the skirt (9).

5. The eight-cavity injection mold with balanced glue feeding according to claim 4, characterized in that: The support ring (101) is a circular ring or a square ring.

6. The eight-cavity injection mold with balanced glue feeding according to claim 4, characterized in that: The connecting rod (102) and the supporting ring (101) are arranged as an integrally formed structure.

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