Mold and injection molding device

Abstract

The embodiment of the utility model provides a mold and an injection molding device. The mold comprises a main body part, a mold core, at least one movable mold core and a pushing assembly. The mold core is arranged on the main body part, and at least one side wall of the mold core is sequentially provided with a first forming face and a first end face in the first direction. The movable mold core is in sliding fit with the main body part in the second direction. The movable mold core is sequentially provided with a second forming face and a second end face in the first direction. In the mold closing state, the first end face is attached to the second end face, and at least part of a cavity is defined by the second forming face and the first forming face. The cavity is used for forming a workpiece. In the mold opening state, the first end face and the second end face are arranged at intervals. In the mold closing state, the pushing assembly is arranged on the side, away from the cavity, of the first end face in the first direction. In the mold opening state, the pushing assembly can move in the first direction and eject the workpiece out. According to the mold provided by the embodiment of the invention, ejection traces are reduced, and the appearance of a produced workpiece is more attractive.

Description

Technical Field

[0001] The present application relates to the technical field of injection molds, and in particular to a mold and an injection molding device. Background Art

[0002] As people's living standards improve, consumers have higher and higher requirements on the appearance of products, and prefer plastic products with fewer parting lines and more beautiful appearance.

[0003] In the related art, a workpiece is formed in a mold cavity by injection molding or the like. After the workpiece is cooled in the mold cavity, it is ejected out of the mold by an ejector assembly. However, the plastic workpiece produced by this method usually has many ejection marks that cannot be avoided, which affects the appearance of the product. Utility Model Content

[0004] In view of this, the embodiments of the present application hope to provide a mold and an injection molding device that can reduce ejection marks and improve the aesthetics of the product appearance.

[0005] To achieve the above object, one aspect of an embodiment of the present application provides a mold, wherein the mold has a mold closing state and a mold opening state, including:

[0006] Main body;

[0007] A mold core is arranged on the main body, and a first molding surface and a first end surface are arranged in sequence along a first direction on at least one side wall of the mold core;

[0008] at least one movable core, slidably matched with the main body along the second direction, the movable core is sequentially provided with a second molding surface and a second end surface along the first direction, in the mold closing state, the first end surface is in contact with the second end surface, the second molding surface and the first molding surface define at least a part of a cavity, the cavity is used to form a workpiece, in the mold opening state, the first end surface and the second end surface are spaced apart;

[0009] The ejection assembly is arranged on the side of the first end face away from the cavity in the mold closing state and along the first direction. In the mold opening state, the ejection assembly can move along the first direction and eject the workpiece, wherein the first direction intersects with the second direction.

[0010] In some embodiments, the mold core is provided with a side wall of the first end face on which a sliding fitting surface is provided that slides with the ejection assembly, and the sliding fitting surface is located on the side of the first end face that is away from the cavity, and along the second direction, the plane where the first end face is located does not exceed the plane where the sliding fitting surface is located.

[0011] In some embodiments, a first protrusion is formed on a side of the movable core close to the mold core, the first protrusion forms the second end surface and a portion of the second molding surface, and the ejection assembly is arranged on a side of the first protrusion away from the cavity.

[0012] In some embodiments, the movable core is provided with an avoidance groove, which is located on the side of the first protrusion away from the cavity, and a partial area of ​​the push assembly close to one end of the first protrusion protrudes to form a second protrusion. In the mold closing state, the second protrusion extends into the avoidance groove.

[0013] In some embodiments, a dimension of the second end surface in the first direction ranges from 5 mm to 10 mm.

[0014] In some embodiments, a size of the second protrusion in the first direction ranges from 5 mm to 10 mm.

[0015] In some embodiments, the depth of the avoidance groove in the first direction ranges from 5 mm to 10 mm.

[0016] In some embodiments, in the mold closing state, the second protrusion and the projection of the cavity on a plane perpendicular to the first direction have an overlapping area, and a size of the overlapping area in the second direction is not less than 0.5 mm.

[0017] In some embodiments, the push assembly includes a push rod and a push block, wherein one end of the push rod close to the movable core along the first direction is connected to the push block and slidingly cooperates with the main body along the first direction, and the push block forms the second protrusion.

[0018] In some embodiments, the mold core is provided with a limiting surface on the side wall of the first end face, the limiting surface is located on the side of the sliding fitting surface away from the cavity, and in the mold closing state, the limiting surface contacts the side of the push block away from the second protrusion.

[0019] Another aspect of an embodiment of the present application provides an injection molding device, comprising any mold described above.

[0020] The mold provided by the embodiment of the present application, in the mold closing state, defines a cavity for forming at least part of the workpiece through the second molding surface of the movable core and the first molding surface of the mold core, and the ejection assembly is arranged on the side of the first end face away from the cavity, that is, the ejection assembly is spaced apart from the cavity, so that the ejection assembly does not participate in shaping the workpiece, that is, the ejection assembly does not participate in defining the cavity, and in the mold opening state, the movable core slides in a direction away from the mold core to make the second end face away from the first end face, and the movable core leaves enough ejection space for the ejection assembly, so that the ejection assembly can move along the first direction and eject the workpiece, so that when the ejection assembly contacts the workpiece, it is conducive to cooling the workpiece, thereby helping to reduce ejection marks and making the appearance of the workpiece more beautiful. At the same time, the ejection assembly does not participate in defining the cavity, reducing the number of parts that need to cooperate with the sealant, thereby reducing the difficulty of processing and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of a cross-sectional structure of a mold provided in an embodiment of the present application;

[0022] Figure 2 for Figure 1 A schematic diagram of a local enlarged structure;

[0023] Figure 3 for Figure 2 Schematic diagram of the enlarged structure at A.

[0024] Description of Reference Numerals

[0025] 10. Mold; 10a. Cavity; 11. Main body; 12. Mold core; 12a. Side wall; 12b. First molding surface; 12c. First end surface; 12d. Sliding fit surface; 12e. Limiting surface; 13. Movable core; 13a. Second molding surface; 13b. Second end surface; 13c. First protrusion; 13d. Avoidance groove; 14. Push assembly; 14a. Second protrusion; 141. Push rod; 142. Push block. DETAILED DESCRIPTION

[0026] The following is a further detailed description of the implementation of the present application in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present application but cannot be used to limit the scope of the present application.

[0027] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "axial" and "radial" refer to the axial direction and radial direction of the shaft, respectively. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0028] In the description of the embodiments of the present application, it should be noted that the orientations or positional relationships indicated by the terms "middle", "end", "upper", "lower", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0029] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it 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 an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0030] As people's living standards improve, consumers have higher and higher requirements on the appearance of products, and prefer plastic products with fewer parting lines and more beautiful appearance.

[0031] In the related art, the mold usually includes a lower mold plate, an upper mold plate, a mold core, a movable core and a push assembly. The upper mold plate, the movable core, the push assembly and the mold core together enclose a cavity for injection molding, and the workpiece is molded in the cavity by injection molding or other methods. Since the push assembly has a molding surface that encloses a portion of the cavity, the produced workpiece will form a parting line between the push assembly and the molding surface of the movable core, resulting in more ejection marks after ejection, thereby affecting the appearance of the product. At the same time, the push assembly also needs to cooperate with the movable core and the mold core for sealing, which places high requirements on the mold matching of the push assembly and increases the difficulty of processing and assembly.

[0032] Based on the above situation, the first aspect of the embodiment of the present application provides a mold 10, see Figures 1 to 3The mold 10 has a mold closing state and a mold opening state. The mold 10 includes a main body 11, a mold core 12, at least one movable core 13 and a push assembly 14. The mold core 12 is arranged on the main body 11. A first molding surface 12b and a first end surface 12c are sequentially arranged on at least one side wall 12a of the mold core 12 along a first direction. The movable core 13 and the main body 11 are slidably matched along a second direction. The movable core 13 is sequentially arranged on a second molding surface 13a and a second end surface 13b along a first direction. In the mold closing state, the first end surface 12c is affixed to the second end surface 13b, and the second molding surface 13a and the first molding surface 12b define at least part of the mold cavity 10a. The mold cavity 10a is used to form a workpiece. In the mold opening state, the first end surface 12c and the second end surface 13b are spaced apart. In the mold closing state, along the first direction, the push assembly 14 is arranged on the side of the first end surface 12c away from the mold cavity 10a. In the mold opening state, the ejection assembly 14 can move along a first direction to eject the workpiece, wherein the first direction intersects with the second direction.

[0033] It should be noted that when the workpiece is ejected from the cavity 10 a of the mold 10 , it is necessary to eject the workpiece from the cavity 10 a for a distance along the mold opening direction of the mold 10 .

[0034] The mold opening direction is the direction in which the workpiece is ejected when the mold 10 switches from the mold closing state to the mold opening state. Exemplarily, the mold opening direction is the first direction.

[0035] It should be noted that undercut refers to the part of the workpiece in the cavity 10a after molding that hinders the mold 10 from opening or the ejection of the workpiece. For example, it can be a lateral concave-convex part of the workpiece during the molding process. Usually, in the case of lateral undercuts on the workpiece, it is necessary to design a suitable movable core 13 to realize the extraction of the buckle position, and then eject the workpiece, so as to improve the interference between the workpiece and the mold 10. For workpieces with different structural shapes and requirements, the movable core 13 can be designed as a slider, a bevel, a spring position and other mechanisms to solve the problem.

[0036] The movable core 13 in the embodiment of the present application can also be called a "lateral parting core pulling mechanism", that is, a mechanism that can slide perpendicular to the mold opening and closing direction or at a certain angle to the mold opening and closing direction during the mold opening process of the workpiece injection molding. The movable core 13 can be a split structure or an integral structure.

[0037] The first direction may intersect the second direction, that is, the first direction may not be parallel to the second direction.

[0038] Exemplarily, the first direction can be orthogonal to the second direction, that is, the first direction can be perpendicular to the second direction, so that the movable core 13 can slide perpendicular to the mold opening and closing direction during the mold opening process; the first direction can also form a certain angle with the second direction, so that the movable core 13 can slide at a certain angle to the mold opening and closing direction during the mold opening process.

[0039] The embodiment of the present application is described by taking the first direction as a vertical direction and the second direction as a horizontal direction as an example.

[0040] The mold 10 includes at least one movable core 13, that is, the movable core 13 in the mold 10 can be one, two, three, four or five, etc., which is not limited here.

[0041] It should be noted that the movable core 13 can be arranged corresponding to the side wall 12a of the mold core 12. It can be one movable core 13 corresponding to one side wall 12a of the mold core 12, one movable core 13 corresponding to multiple side walls 12a of the mold core 12, or multiple movable cores 13 corresponding to one side wall 12a of the mold core 12.

[0042] The multiple mentioned in the embodiments of the present application refers to a number of two or more.

[0043] A first molding surface 12b and a first end surface 12c are sequentially arranged along a first direction on at least one side wall 12a of the mold core 12, wherein the first molding surface 12b is a surface in contact with the workpiece and participates in shaping the workpiece. One end of the first molding surface 12b along the first direction ends at the first end surface 12c, and the first end surface 12c is used to seal and contact with other components in the mold closing state.

[0044] The movable core 13 is provided with a second molding surface 13a and a second end surface 13b in sequence along the first direction, wherein the second molding surface 13a is a surface in contact with the workpiece and participates in shaping the workpiece. One end of the second molding surface 13a along the first direction ends at the second end surface 13b, and the second end surface 13b is used to seal and contact with the first end surface 12c in the mold closing state, so that the second molding surface 13a and the first molding surface 12b enclose at least part of the cavity 10a.

[0045] It should be noted that injection molding is a common manufacturing process. Usually, during the injection molding process, the sealant is injected into the mold 10, and then molding and injection molding are performed to combine the sealant with the molded workpiece, thereby improving the quality, performance and durability of the molded workpiece.

[0046] Exemplarily, the first end face 12c can be a sealing surface, and the second end face 13b can also be a sealing surface. The mold core 12 and the movable core 13 are respectively sealed with glue through the sealing surfaces between the first end face 12c and the second end face 13b. Compared with the related technology in which the ejector assembly also participates in the sealing, the parts that need to be sealed are reduced, thereby reducing the mold matching requirements of the ejector assembly 14 and reducing the difficulty of processing and assembly.

[0047] Exemplarily, the main body 11 may be a lower template.

[0048] The movable core 13 and the main body 11 slide in cooperation along the second direction. On the one hand, the second end face 13b of the movable core 13 can be moved toward the direction close to the mold core 12, and the second end face 13b can be in contact with the first end face 12c of the mold core, thereby defining at least part of the mold cavity 10a. On the other hand, the second end face 13b of the movable core 13 can be moved away from the mold core 12, and the first end face 12c and the second end face 13b are spaced a certain distance apart, that is, in the mold opening state, the first end face 12c and the second end face 13b are spaced apart, so that the movable core 13 leaves enough ejection space for the ejection assembly 14, and the ejection assembly 14 can smoothly contact the workpiece located in the mold cavity 10a and eject the workpiece along the first direction.

[0049] In the mold closing state, along the first direction, the ejector assembly 14 is arranged on the side of the first end face 12c away from the cavity 10a. That is to say, the ejector assembly 14 does not participate in defining the cavity 10a and is separated from the cavity 10a by a distance, thereby reducing the parting line of the cavity 10a and making the appearance of the injection molded workpiece more beautiful.

[0050] Exemplarily, the core 12 is arranged on the main body 11, and the mold 10 is in the closed mold state, and a cavity 10a is defined between the core 12 and the movable core 13. The workpiece is molded in the cavity 10a by injection molding or other methods. After the workpiece is molded and cooled, the mold 10 switches from the closed mold state to the open mold state, and the movable core 13 slides in a direction away from the core 12 to make the second end face 13b away from the first end face 12c. In this way, the ejection assembly 14 can move along the first direction and eject the workpiece, so that when the ejection assembly 14 contacts the workpiece, it is beneficial to cool the workpiece, thereby helping to reduce the ejection marks and making the appearance of the workpiece more beautiful, thereby realizing the separation of the workpiece from the first molding surface 12b of the core 12, and at least part of the workpiece can also be exposed from the cavity 10a, so as to facilitate the removal of the workpiece.

[0051] The mold 10 provided in the embodiment of the present application, in the mold closing state, defines a cavity 10a for forming at least part of the workpiece through the second molding surface 13a of the movable core 13 and the first molding surface 12b of the core 12, and the ejection assembly 14 is arranged on the side of the first end face 12c away from the cavity 10a, so that the ejection assembly 14 does not participate in shaping the workpiece, that is, the ejection assembly 14 does not participate in defining the cavity 10a, and in the mold opening state, the movable core 13 slides in the direction away from the core 12 to make the second end face 13b away from the first end face 12c, and the movable core 13 leaves enough ejection space for the ejection assembly 14, so that the ejection assembly 14 can move along the first direction and eject the workpiece, so that when the ejection assembly 14 contacts the workpiece, it is conducive to cooling the workpiece, thereby helping to reduce the ejection marks, and the appearance of the workpiece is more beautiful. At the same time, the ejection assembly 14 does not participate in defining the cavity 10a, reducing the parts that need to cooperate with the sealant, thereby reducing the difficulty of processing and assembly.

[0052] For some examples, see Figures 1 to 3 The mold core 12 is provided with a side wall 12a having a first end surface 12c and a sliding mating surface 12d that is slidably mated with the ejection assembly 14. The sliding mating surface 12d is located on the side of the first end surface 12c away from the cavity 10a, and along the second direction, the plane where the first end surface 12c is located does not exceed the plane where the sliding mating surface 12d is located.

[0053] It should be noted that the first molding surface 12b, the first end surface 12c and the sliding fitting surface 12d are arranged in sequence along the first direction. In the mold opening state, the ejection assembly 14 moves from the sliding fitting surface 12d to the first molding surface 12b, that is, in the direction of the cavity 10a, thereby ejecting the workpiece located on the cavity wall of the cavity 10a.

[0054] Since the ejection assembly 14 moves along the first direction and ejects the workpiece, in the mold open state, the mold core 12 needs to avoid the moving path of the ejection assembly 14 to achieve smooth ejection of the ejection assembly 14. Therefore, the plane where the first end face 12c is located needs to not exceed the plane where the sliding mating surface 12d is located along the second direction.

[0055] The plane where the first end surface 12c is located may be coplanar with the plane where the sliding fit surface 12d is located; or, the plane where the first end surface 12c is located is farther away from the movable core 13 along the second direction than the plane where the sliding fit surface 12d is located.

[0056] Here, by setting the plane where the first end face 12c is located not beyond the plane where the sliding fitting surface 12d is located, the mold core 12 avoids the moving path of the ejection assembly 14, thereby achieving the ejection assembly 14 to move smoothly along the first direction and eject the workpiece in the mold open state.

[0057] For some examples, see Figures 1 to 3 The movable core 13 is formed with a first protrusion 13c on one side close to the mold core 12. The first protrusion 13c forms the second end surface 13b and a part of the second molding surface 13a. The ejection assembly 14 is disposed on the side of the first protrusion 13c away from the mold cavity 10a.

[0058] It should be noted that the end surface of the first protrusion 13c along the second direction is formed as the second end surface 13b, and the end of the first protrusion 13c along the first direction away from the ejection assembly 14 forms a part of the second molding surface 13a.

[0059] By arranging the first protrusion 13c on the movable core 13, the situation that when the first protrusion 13c is arranged on the mold core 12 in the mold opening state, it is easy to cause the first protrusion 13c to be located on the pushing path of the pushing assembly 14, and the pushing assembly 14 cannot directly slide along the first direction and contact the workpiece located at the cavity 10a is improved. This makes the structure of the movable core 13 and the mold core 12 more reasonable, and the pushing path of the pushing assembly 14 is shortened and optimized.

[0060] That is to say, by forming the first protrusion 13c on the movable core 13, the first protrusion 13c is fitted with the mold core 12, thereby defining the mold cavity 10a, thereby enhancing the fitting tightness between the movable core 13 and the mold core 12 and the overall structural strength. At the same time, the first protrusion 13c is arranged on the movable core 13, and the pushing assembly 14 is arranged on the side away from the mold cavity 10a at the fitting point of the first protrusion 13c and the mold core 12, thereby making the structure of the movable core 13 and the mold core 12 more reasonable, shortening and optimizing the pushing path of the pushing assembly 14.

[0061] For some examples, see Figures 1 to 3 The movable core 13 is provided with an avoidance groove 13d. The avoidance groove 13d is located on the side of the first protrusion 13c away from the cavity 10a. A part of the region of the ejection assembly 14 near one end of the first protrusion 13c protrudes to form a second protrusion 14a. In the mold closing state, the second protrusion 14a extends into the avoidance groove 13d.

[0062] A partial area of ​​the push assembly 14 near one end of the first protrusion 13c protrudes to form a second protrusion 14a, which can make the push assembly 14 closer to the cavity 10a, thereby shortening the stroke of the push assembly 14 to reach the cavity 10a, and shortening the distance between the sliding fit between the push assembly 14 and the main body 11 and the contact point between the push assembly 14 and the workpiece, which is more conducive to the push assembly 14 to eject the workpiece, thereby improving the reliability of the push assembly 14.

[0063] At the same time, the movable core 13 is provided with an avoidance groove 13d for avoiding the second protrusion 14a, so that the size of the mold 10 in the first direction is smaller and the structure of the mold 10 is more compact.

[0064] Therefore, by setting an avoidance groove 13d on the movable core 13, a partial area of ​​the ejection component 14 close to one end of the first protrusion 13c protrudes to form a second protrusion 14a. The avoidance groove 13d cooperates with the second protrusion 14a, so that the reliability of the ejection component 14 is improved, which is conducive to the ejection of the workpiece by the ejection component 14. At the same time, the size of the mold 10 in the first direction is smaller and the structure of the mold 10 is more compact.

[0065] In some embodiments, the size of the second end surface 13b in the first direction ranges from 5 mm to 10 mm. Figure 3 , the dimension a of the second end surface 13b in the first direction is 5mm, 6mm, 7mm, 8mm, 9mm or 10mm, etc.

[0066] It should be noted that, in the mold open state, the process of the ejection component 14 in the embodiment of the present application to push the workpiece is delayed ejection, that is, the ejection component 14 needs to move a certain distance and a certain time before it can contact the workpiece and continue to move to eject the workpiece.

[0067] It can be understood that, the shorter the delayed ejection stroke of the ejection assembly 14 is, the more compact the structure of the mold 10 in the first direction is, thereby reducing the space occupied by the mold 10 in the first direction.

[0068] The dimension of the second end surface 13 b in the first direction is, that is, the thickness of the first protrusion 13 c in the first direction.

[0069] By limiting the thickness of the first protrusion 13c in the first direction to 5mm-10mm, the situation of insufficient structural strength caused by insufficient thickness of the first protrusion 13c in the first direction is improved, and at the same time, the stroke of the ejection assembly 14 before contacting the workpiece during the ejection process is minimized, that is, the stroke of delayed ejection is reduced, thereby increasing the compactness of the mold 10 in the first direction.

[0070] In some embodiments, the size of the second protrusion 14a in the first direction ranges from 5 mm to 10 mm. Figure 3 For example, the dimension b of the second protrusion 14a in the first direction is 5 mm, 6 mm, 7 mm, 8 mm, 9 mm or 10 mm, etc.

[0071] By limiting the size of the second protrusion 14a in the first direction to 5mm-10mm, the problem of insufficient structural strength due to the second protrusion 14a in contact with the workpiece being too small in the first direction, which makes the second protrusion 14a easy to be damaged, is improved. At the same time, the problem of excessive size of the second protrusion 14a in the first direction, which causes the pushing stroke of the pushing assembly 14 to be too large, is also improved, thereby increasing the reliability of the second protrusion 14a and improving the compactness of the mold 10 in the first direction.

[0072] In some embodiments, the depth of the avoidance groove 13d in the first direction ranges from 5 mm to 10 mm. Figure 3 , exemplarily, the depth c of the avoidance groove 13d in the first direction is 5 mm, 6 mm, 7 mm, 8 mm, 9 mm or 10 mm, etc.

[0073] It should be noted that the depth of the avoidance groove 13d in the first direction can be set to the same size as the size of the second protrusion 14a in the first direction, so that in the mold closing state, the end surface of the second protrusion 14a close to the cavity 10a along the first direction is in contact with the movable core 13; the depth of the avoidance groove 13d in the first direction can also be set to a different size from the size of the second protrusion 14a in the first direction, for example, the depth of the avoidance groove 13d in the first direction is greater than the size of the second protrusion 14a in the first direction, so that in the mold closing state, a gap is formed between the end surface of the second protrusion 14a close to the cavity 10a along the first direction and the avoidance groove 13d of the movable core 13.

[0074] By limiting the depth of the avoidance groove 13d in the first direction to 5mm-10mm, which matches the size of the second protrusion 14a in the first direction, the stroke of delayed pushing of the pushing assembly 14 is more reasonable, further improving the compactness of the mold 10 in the first direction.

[0075] In some embodiments, in the mold closing state, the projection of the second protrusion 14a and the mold cavity 10a on the plane perpendicular to the first direction has an overlapping area. The size of the overlapping area in the second direction is not less than 0.5 mm. Figure 3 , exemplarily, the dimension d of the overlapping area in the second direction is 0.5 mm, 0.6 mm, 0.8 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 4 mm, 5 mm or 6 mm, etc.

[0076] A plane perpendicular to the first direction, for example, if the first direction is a vertical direction, then the plane perpendicular to the first direction is a horizontal plane.

[0077] It should be noted that the projection of the cavity 10a on the plane perpendicular to the first direction refers to the projection of the portion of the cavity 10a defined by the second molding surface 13a and the first molding surface 12b on the plane perpendicular to the first direction.

[0078] The overlapping area between the projection of the second protrusion 14a and the cavity 10a on the plane perpendicular to the first direction is the contact surface between the ejection assembly 14 and the workpiece located at the cavity 10a during the ejection process along the first direction.

[0079] It is understandable that the larger the contact surface between the ejection assembly 14 and the workpiece, the less likely the ejection assembly 14 is to scratch the surface of the workpiece, while also improving the reliability of the ejection assembly 14 in ejecting the workpiece.

[0080] At the same time, the larger the size of the overlapping area in the second direction is, the higher the ejection reliability of the ejection assembly 14 is.

[0081] In a specific embodiment, the projection of the cavity 10a on the plane perpendicular to the first direction completely falls within the projection of the second protrusion 14a on the plane perpendicular to the first direction. At this time, the overlapping area of ​​the projection is the projection of the cavity 10a on the plane perpendicular to the first direction, and the size of the overlapping area in the second direction is the size of the cavity 10a in the second direction. At this time, when the ejection assembly 14 ejects the workpiece along the first direction, the contact surface between the ejection assembly 14 and the workpiece is the largest, thereby further improving the ejection reliability of the ejection assembly 14.

[0082] Therefore, by setting the size of the contact surface between the ejection assembly 14 and the workpiece in the second direction to be no less than 0.5 mm, at least a portion of the second protrusion 14a can effectively contact the workpiece at the cavity 10a, thereby improving the reliability of the ejection assembly 14 in contacting the workpiece and ejecting the workpiece, and at the same time helping to prevent the ejection assembly 14 from scratching the surface of the workpiece.

[0083] For some examples, see Figures 1 to 3 The push assembly 14 includes a push rod 141 and a push block 142. One end of the push rod 141 close to the movable core 13 along the first direction is connected to the push block 142 and slides with the main body 11 along the first direction. The push block 142 forms a second protrusion 14a.

[0084] The ejection assembly 14 includes a push rod 141 and a push block 142, wherein the push block 142 is located at one end close to the cavity 10a and is used to contact and eject the workpiece. The push rod 141 is used to slide with the main body 11 and drive the push block 142 and the ejector plate to eject together.

[0085] Here, by providing the push rod 141 and the push block 142 and forming the second protrusion 14a on the push block 142, it is convenient for the ejection assembly to be ejected and slide along the first direction, the structure of the ejection assembly is more reasonable, and the ejection of the workpiece by the push block 142 is more reliable.

[0086] For some examples, see Figure 3 The mold core 12 is provided with a limiting surface 12e on the side wall 12a of the first end surface 12c. The limiting surface 12e is located on the side of the sliding mating surface 12d away from the cavity 10a, and in the mold closing state, the limiting surface 12e contacts the side of the push block 142 away from the second protrusion 14a.

[0087] It should be noted that the plane where the limiting surface 12e is located can be parallel to the plane perpendicular to the first direction, and can also form a certain angle with the plane perpendicular to the first direction.

[0088] The first molding surface 12b, the first end surface 12c, the sliding fitting surface 12d and the limiting surface 12e are sequentially arranged along the first direction.

[0089] The limiting surface 12 e contacts the side of the push block 142 away from the second protrusion 14 a , that is, the limiting surface 12 e faces the movable core 13 , so that the core 12 limits the ejection assembly 14 .

[0090] In some embodiments, a recessed portion is formed on the main body 11, and the limiting surface 12e and the recessed portion jointly define a limiting groove. In the mold closing state, at least part of the push block 142 is arranged in the limiting groove, and the groove wall of the limiting groove limits the push block 142 in at least three directions, thereby making the push assembly 14 more compact with the main body 11 and the mold core 12.

[0091] Therefore, by providing the limiting surface 12 e on the mold core 12 , the mold core 12 can limit the ejection assembly 14 , thereby increasing the compactness between the ejection assembly 14 and the mold core 12 .

[0092] A second aspect of the embodiments of the present application provides an injection molding device, which includes the mold 10 provided in any embodiment of the present application.

[0093] It should be noted that the injection molding device may include an injection device, a mold clamping device, a hydraulic system, an electrical control system, etc. The mold clamping device may include a mold 10 .

[0094] The basic requirements of injection molding are plasticization, injection and molding. Plasticization is the premise for achieving and ensuring the quality of molded products, and in order to meet the requirements of molding, injection must ensure sufficient pressure and speed. At the same time, since the injection pressure is very high, a correspondingly high pressure is generated in the mold cavity 10a, so there must be a sufficiently large clamping force. It can be seen that the injection device and the clamping device are key components of the injection molding device.

[0095] In the injection molding device of the embodiment of the present application, the mold 10 of the injection molding device, in the mold closing state, defines a cavity 10a for forming at least a portion of a workpiece through the second molding surface 13a of the movable core 13 of the mold 10 and the first molding surface 12b of the core 12, and the ejection assembly 14 is arranged on the side of the first end surface 12c away from the cavity 10a, so that the ejection assembly 14 does not participate in shaping the workpiece, that is, the ejection assembly 14 does not participate in defining the cavity 10a, and in the mold opening state, the movable core 13 slides in a direction away from the core 12 to make the second end surface 13b away from the first end surface 12c, and the movable core 13 leaves enough ejection space for the ejection assembly 14, so that the ejection assembly 14 can move along the first direction and eject the workpiece, so that when the ejection assembly 14 contacts the workpiece, it is beneficial to cool the workpiece, thereby helping to reduce ejection marks and making the appearance of the workpiece more beautiful.

[0096] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A mold, characterized in that: The mold has a mold closing state and a mold opening state, including: Main body; A mold core is arranged on the main body, and a first molding surface and a first end surface are arranged in sequence along a first direction on at least one side wall of the mold core; at least one movable core, slidably matched with the main body along the second direction, the movable core is sequentially provided with a second molding surface and a second end surface along the first direction, in the mold closing state, the first end surface is in contact with the second end surface, the second molding surface and the first molding surface define at least a part of a cavity, the cavity is used to form a workpiece, in the mold opening state, the first end surface and the second end surface are spaced apart; The ejection assembly is arranged on the side of the first end face away from the cavity in the mold closing state and along the first direction. In the mold opening state, the ejection assembly can move along the first direction and eject the workpiece, wherein the first direction intersects with the second direction.

2. The mold according to claim 1, characterized in that: The mold core is provided with a side wall of the first end face, on which a sliding fitting surface is provided for sliding cooperation with the ejection assembly. The sliding fitting surface is located on the side of the first end face away from the cavity, and along the second direction, the plane where the first end face is located does not exceed the plane where the sliding fitting surface is located.

3. The mold according to claim 2, characterized in that: A first protrusion is formed on a side of the movable core close to the mold core, the first protrusion forms the second end surface and a part of the second molding surface, and the ejection assembly is arranged on a side of the first protrusion away from the cavity.

4. The mold according to claim 3, characterized in that: The movable core is provided with an avoidance groove, which is located on the side of the first protrusion away from the cavity. A partial area of ​​the ejection assembly close to one end of the first protrusion protrudes to form a second protrusion. In the mold closing state, the second protrusion extends into the avoidance groove.

5. The mold according to claim 4, characterized in that: The size of the second end surface in the first direction ranges from 5 mm to 10 mm.

6. The mold according to claim 5, characterized in that: The size of the second protrusion in the first direction ranges from 5 mm to 10 mm; and / or, The depth of the avoidance groove in the first direction ranges from 5 mm to 10 mm.

7. The mold according to claim 6, characterized in that: In the mold closing state, the second protrusion and the projection of the cavity on a plane perpendicular to the first direction have an overlapping area, and a size of the overlapping area in the second direction is not less than 0.5 mm.

8. The mold according to claim 4, characterized in that: The push assembly includes a push rod and a push block. One end of the push rod close to the movable core along the first direction is connected to the push block and slidably cooperates with the main body along the first direction. The push block forms the second protrusion.

9. The mold according to claim 8, characterized in that: A limiting surface is arranged on the side wall of the mold core having the first end surface, the limiting surface is located on the side of the sliding fitting surface away from the cavity, and in the mold closing state, the limiting surface contacts the side of the push block away from the second protrusion.

10. An injection molding device, characterized in that: Comprising the mold according to any one of claims 1 to 9.

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