Two-color mold structure for ejection of soft rubber runner

Abstract

The utility model discloses a double-color mold structure for soft rubber runner ejection, a double-color mold comprises a first injection mold and a second injection mold, and the second injection mold is used for pouring soft rubber; a soft rubber runner groove of the secondary injection mold is provided with an ejection piece; an ejection groove is formed in the top end of the ejection piece; a notch of the ejection groove faces the ejection direction; the ejection groove partially or completely surrounds the ejected runner; during demolding, the ejection groove can be ejected out of the soft rubber runner groove. According to the double-color mold structure for ejecting the soft rubber runner, the ejection groove used for partially or completely surrounding the soft rubber runner is formed in the ejection piece, so that the problem that soft rubber is easy to slip when being ejected in the prior art is solved, a horn gate can be completely ejected, manual trimming is not needed, the labor cost is saved, and the production efficiency is improved. The ejection efficiency is improved; therefore, the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a double-color mold structure with soft glue runner ejection. Background Art

[0002] The bull horn ejection structure is a demoulding structure design in the injection mold. The main advantage of the bull horn ejection structure is that it can provide a more uniform demoulding force distribution and reduce the deformation or damage that may occur in the product during the demoulding process. Most of the existing bull horn ejection structures are such as the bull horn gate structure for gel ejection in an injection mold with publication number CN217670820U, and the ejection structure disclosed in the Chinese patent with publication number CN216100181U and the bull horn type runner and injection mold. Most of the existing bull horn gates realize ejection and demoulding by setting an ejector pin in the runner groove of the mold. The top of the existing ejector pin is generally lower than the main runner groove, and an ejector well is reserved between the top of the ejector pin and the runner groove to form an ejector runner under the main runner during casting; during ejection, the ejector pin moves toward the ejector well to eject the formed ejector runner. However, when the existing horn ejection structure is used for demoulding during injection molding of soft rubber products, if the ejection runner is too short, the demoulding effect will be poor; if the ejection runner is too long, the product will become soft and slippery due to the characteristics of the soft rubber. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a two-color mold structure for ejecting a soft glue flow channel, the two-color mold comprises a one-shot mold and a two-shot mold, wherein the two-shot mold is used for pouring soft glue; the soft glue flow channel groove of the two-shot mold is provided with an ejector;

[0004] The top of the ejector is provided with an ejector groove; the notch of the ejector groove faces the ejection direction; the ejector groove partially or completely surrounds the flow channel at the ejection location;

[0005] During demoulding, the ejection groove can be ejected out of the soft glue flow channel groove.

[0006] Preferably, the depth of the ejection groove is the same as the depth of the soft glue runner groove.

[0007] Preferably, the cross section of the ejection groove is cross-shaped or straight-shaped.

[0008] Preferably, the cross-section of the ejection groove is one of a U-shape and a ⌒-shape.

[0009] Preferably, the cross-section of the ejection groove is one of circular, elliptical, trapezoidal, rectangular and triangular.

[0010] Preferably, the one-shot mold includes a front-shot mold and a first rear mold for cooperating with the front-shot mold for casting;

[0011] The two-shot mold includes a two-shot front mold and a second back mold for casting in cooperation with the two-shot front mold;

[0012] The pre-shooting mold comprises a shooting panel, a water ejection port plate and a pre-shooting template which are arranged in sequence; the shooting panel and the water ejection port plate are molded together to form a water ejection port diversion cavity.

[0013] The double-color mold structure for soft rubber runner ejection provided by the utility model solves the problem of soft rubber slipping during ejection in the prior art by arranging an ejection groove on the ejection part for partially or completely surrounding the soft rubber runner; at the same time, the bull horn gate can be completely ejected, and manual trimming is no longer required, which saves labor costs and improves ejection efficiency, thereby improving production efficiency. According to experimental data, production efficiency can be increased by 20%. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A three-dimensional diagram of a mold with a two-color mold structure using a soft rubber runner ejection provided by the utility model;

[0015] Figure 2 It is a combination diagram of the first rear mold plate and the second rear mold being combined with the first shot molded part and the second shot molded part respectively;

[0016] Figure 3 It is a three-dimensional diagram of the first rear mold plate and the second rear mold plate;

[0017] Figure 4 A schematic diagram of an injection molded part and a jet channel;

[0018] Figure 5 It is a schematic diagram of a two-shot molded part and a two-shot flow channel;

[0019] Figure 6 Hold the soft rubber runner diagram for the ejector;

[0020] Figure 7 This is the exploded view of the ejector and the soft rubber runner;

[0021] Figure 8 A cross section for the combination of the ejector and the mold;

[0022] Fig. 9 This is a cross section at another angle where the ejector and the mold are combined;

[0023] Fig.10 This is a cross-sectional view of the ejection groove completely surrounding the soft rubber flow channel;

[0024] in:

[0025] 10. One-shot front mold; 11. One-shot face plate; 12. One-shot water inlet plate; 13. One-shot front mold plate; 14. One-shot gate sleeve; 20. Two-shot front mold; 21. Two-shot face plate; 22. Two-shot front mold plate; 23. Two-shot gate sleeve; 30. First rear mold; 31. First rear mold plate; 32. First ejector plate; 33. First bottom plate; 40. Second rear mold; 41. Second rear mold plate; 42. Second ejector plate; 43. Second bottom plate; 50. One-shot molded part; 51. One-shot main flow channel; 52. Water inlet flow channel; 53. One-shot branch flow channel; 60. Two-shot molded part; 61. Two-shot main flow channel; 62. Soft glue flow channel; 63. Bull horn gate; 412. Soft glue flow channel groove; 413. Ejector; 4131. Ejector groove. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments. However, the following embodiments are only preferred embodiments of the present invention, not all of them. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work all belong to the protection scope of the present invention. The experimental methods in the following embodiments are conventional methods unless otherwise specified. The materials, reagents, etc. used in the following embodiments are all commercially available unless otherwise specified.

[0027] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] The utility model provides a two-color mold structure for ejecting a soft glue flow channel, the two-color mold comprises a one-shot mold and a two-shot mold, wherein the two-shot mold is used for pouring soft glue; the soft glue flow channel groove 412 of the two-shot mold is provided with an ejector 413;

[0030] The top of the ejector 413 is provided with an ejector groove 4131; the notch of the ejector groove 4131 faces the ejection direction; the ejector groove 4131 partially or completely surrounds the flow channel at the ejection location;

[0031] During demoulding, the ejection groove 4131 can be ejected out of the soft glue flow channel groove 412 .

[0032] When implementing it, Figure 1-10 As shown, a two-color mold structure with soft glue runner ejection, the two-color mold includes a one-shot mold and a two-shot mold, wherein the two-shot mold is used for pouring soft glue; a soft glue runner groove 412 connected to the bull horn gate groove of the two-shot groove is provided on the rear mold parting surface of the two-shot mold; the soft glue runner groove 412 is provided with a through hole (not marked in the figure); an ejector 413 is provided in the through hole; the ejector 413 is an ejector pin, an ejector rod, an ejector pin, etc.; an ejector plate is connected to the bottom of the ejector 413; the ejector plate is used to realize the up and down movement of the ejector 413; in this embodiment, the ejector 413 is driven to move up and down by the ejector plate, which is a commonly used technical means in the field and will not be repeated here.

[0033] like Figure 6 , Figure 7 As shown, an ejection groove 4131 is provided at the top of the ejection member 413; the notch of the ejection groove 4131 faces the ejection direction; the ejection groove 4131 partially or completely surrounds the flow channel at the ejected position, that is, the ejection groove 4131 and the soft glue flow channel groove 412 together constitute a complete main flow channel groove; during demolding, the ejection groove 4131 can be ejected from the soft glue flow channel groove 412.

[0034] like Figure 1 , Figure 2 As shown, the ejection groove 4131 partially surrounds the top of the soft rubber flow channel groove 412. At this time, the cross-section of the ejection groove 4131 is U-shaped, ⌒-shaped, or a circle, ellipse, trapezoid, rectangle, triangle, or special shape with the top removed. The notch of the ejection groove 4131 is oriented in the same direction as the ejection direction; the ejection groove 4131 partially surrounds the soft rubber flow channel 62. When the ejection piece 413 is ejected, the ejection groove 4131 can partially hold the formed soft rubber flow channel 62 (such as Figure 6 As shown in the figure, the soft rubber flow channel 62 is not easy to slide out from the ejection groove 4131; thereby solving the problem of the soft rubber being easy to slip when being ejected in the prior art.

[0035] Or the ejection groove 4131 completely surrounds the soft rubber flow channel 62. In this case, the cross section of the ejection groove 4131 is one of a closed circle, an ellipse, a trapezoid, a rectangle, a triangle, or a special shape. The ejection groove 4131 closes and completely surrounds the formed soft rubber flow channel 62 (such as Fig.10 As shown in the figure, when the ejection piece 413 is ejected, the ejection groove 4131 can completely embrace the molded soft rubber runner 62, so that the molded soft rubber runner 62 is ejected along with the ejection of the ejection groove 4131, and the molded soft rubber runner 62 will not slip out of the ejection groove 4131; thereby solving the problem of easy slipping of soft rubber during ejection in the prior art; when demolding, due to the characteristics of the soft rubber, the molded bull horn gate 63 can be pulled out from the side of the ejection groove 4131.

[0036] At the same time, compared with traditional ejectors, the ejection groove 4131 of the ejection piece 413 provided by the utility model can reduce the distance from the bull-horn gate groove. Under the action of the same ejection force, the bull-horn gate 63 can be subjected to a greater pulling force, so that the bull-horn gate 63 can be completely ejected, and manual trimming is no longer required, saving labor costs.

[0037] The two-color mold structure for ejection of the soft glue flow channel provided by the embodiment of the utility model solves the problem of the soft glue being easy to slip during ejection in the prior art by setting an ejection groove on the ejection part for partially or completely surrounding the soft glue flow channel; at the same time, the bull horn gate can be completely ejected, and no manual trimming is required, which saves labor costs and improves ejection efficiency; thus improving production efficiency. According to experimental data, production efficiency can be increased by 20%.

[0038] Furthermore, the depth of the ejection groove 4131 is the same as the depth of the soft rubber flow channel groove 412 .

[0039] In a specific implementation, the depth of the ejection groove 4131 is the same as the depth of the soft glue flow channel groove 412 of the second rear mold 40. By designing that the depth of the ejection groove 4131 is the same as the depth of the soft glue flow channel groove 412, the ejection effect is better during ejection.

[0040] Furthermore, the cross section of the ejection groove 4131 is cross-shaped or straight-shaped.

[0041] In a specific implementation, the cross section of the ejector groove 4131 is in the shape of a straight line. When more than two injection molded parts need to be injected at the same time, the cross section of the ejector groove 4131 is in the shape of a cross (such as Figure 1 , Figure 2 As shown in the figure, the injection molding efficiency is improved; at the same time, the cross shape increases the contact area with the flow channel compared to the straight shape, and the ejection groove 4131 and the molded soft rubber flow channel have a better holding effect during ejection.

[0042] Furthermore, the cross section of the ejection groove 4131 is U-shaped. In specific implementation, the U-shape can deepen the depth of the ejection groove 4131 compared to the ⌒-shape, and for some soft rubbers with higher softness, the U-shape has better hugging and ejection effects.

[0043] Further, the one-shot mold includes a one-shot front mold 10 and a first rear mold 30 for matching casting with the one-shot front mold 10;

[0044] The two-shot mold includes a two-shot front mold 20 and a second rear mold 40 for cooperating with the two-shot front mold 20 for casting;

[0045] The pre-shooting mold 10 comprises a shooting plate 11, a water ejection port plate 12 and a pre-shooting mold plate 13 which are sequentially arranged; the shooting plate 11 and the water ejection port plate 12 are molded together to form a water ejection port diversion cavity.

[0046] When implementing it, Figure 1 , Figure 2 As shown, Figure 4 As shown, a jet channel includes a jet main channel 51, a jet outlet channel 52 and a jet branch channel 53; Figure 5 As shown, the two-shot flow channel includes a two-shot main flow channel 61, a soft glue flow channel 62 and a bull horn gate 63; the one-shot mold includes a one-shot front mold 10 and a first rear mold 30 for matching casting with the one-shot front mold 10;

[0047] The two-shot mold includes a two-shot front mold 20 and a second rear mold 40 for matching casting with the two-shot front mold 20;

[0048] A pre-shot mold 10 includes a shot panel 11, a shot gate plate 12 and a pre-shot template 13 which are arranged in sequence from top to bottom; a shot panel 11 is provided with a shot main channel cavity for forming a shot main channel 51; a shot panel 11 and a shot gate plate 12 are combined to form a gate flow channel cavity for forming a gate flow channel 52; a pre-shot template 13 is provided with a shot branch flow channel cavity for forming a shot branch flow channel 53; the upper end of the shot main channel cavity is connected to a shot gate sleeve 14, and the lower end is connected to the gate flow channel cavity; the bottom of the gate flow channel cavity is connected to a shot branch flow channel cavity;

[0049] The two-shot front mold 20 includes a two-shot panel 21 and a two-shot front mold plate 22 arranged in sequence from top to bottom; the two-shot panel 21 and the two-shot front mold plate 22 are molded together to form a two-shot main flow channel cavity for molding the two-shot main flow channel 61;

[0050] The first rear mold 30 includes a first rear mold plate 31, a first ejector plate 32 and a first bottom plate 33 arranged in sequence from top to bottom; the first rear mold plate 31 is molded with a front mold plate 13 to form an injection molding cavity for molding an injection molded part 50; the injection molding cavity is connected to an injection runner cavity; the first ejector plate 32 is connected to the bottom of the ejector 413; the first ejector plate 32 is used to move the ejector 413 up and down; the first ejector plate 32 is used to eject the soft glue runner when the flow is transferred to the soft glue injection molding;

[0051] The second rear mold 40 includes a second rear mold plate 41, a second ejector plate 42, and a second bottom plate 43 which are arranged in sequence from top to bottom; the second rear mold plate 41 and the second shot front mold plate 22 are molded together to form a soft glue runner cavity for forming a soft glue runner 62, and a second shot molding cavity for molding a second shot molded part 60; the second rear mold plate 41 is provided with a bull horn gate cavity for molding a bull horn gate 63; the upper end of the second shot main runner cavity is connected to the second shot gate sleeve 23, and the lower end is connected to the second shot molding cavity through the soft glue runner cavity and the bull horn gate cavity in sequence;

[0052] The first rear mold 30 and the second rear mold 40 are arranged on a rotating platform; the rotating platform enables the first rear mold 30 and the second rear mold 40 to flow in sequence between the first shot front mold 10 and the first rear mold 30 to complete the two-color injection molding.

[0053] In this embodiment, a water jet plate is provided in a pre-shot mold to form a water jet flow channel cavity together with a shot plate. When solidification blockage occurs, the flow channel can be easily cleaned by disassembling a shot plate and a water jet plate.

[0054] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A two-color mold structure with soft rubber runner ejection, characterized in that: The two-shot mold comprises a one-shot mold and a two-shot mold, wherein the two-shot mold is used for pouring soft glue; the soft glue flow channel (412) of the two-shot mold is provided with an ejector (413); The top end of the ejection member (413) is provided with an ejection groove (4131); the notch of the ejection groove (4131) faces the ejection direction; the ejection groove (4131) partially or completely surrounds the flow channel at the ejection location; During demoulding, the ejection groove (4131) can be ejected from the soft glue flow channel groove (412).

2. The double-color mold structure for ejection of soft glue runner according to claim 1, characterized in that: The depth of the ejection groove (4131) is the same as the depth of the soft glue flow channel groove (412).

3. The double-color mold structure for ejection of soft glue runner according to claim 1, characterized in that: The cross section of the ejection groove (4131) is cross-shaped or straight-shaped.

4. The double-color mold structure for ejection of soft glue runner according to claim 1, characterized in that: The cross-section of the ejection groove (4131) is one of a U-shape and a ⌒-shape.

5. The double-color mold structure for ejection of soft glue runner according to claim 1, characterized in that: The cross-section of the ejection groove (4131) is one of circular, elliptical, trapezoidal, rectangular, and triangular.

6. The double-color mold structure for ejecting a soft glue runner according to any one of claims 1 to 5, characterized in that: The one-shot mold comprises a front-shot mold (10) and a first rear-shot mold (30) that cooperates with the front-shot mold (10) for casting; The two-shot mold comprises a two-shot front mold (20) and a second back mold (40) that cooperates with the two-shot front mold (20) for casting; The pre-shooting mold (10) comprises a shooting panel (11), a water ejection port plate (12) and a pre-shooting template (13) which are arranged in sequence; the shooting panel (11) and the water ejection port plate (12) are molded together to form a water ejection port diversion cavity.

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