Lightweight injection mold

Abstract

The utility model discloses a lightweight injection mould, relates to the technical field of injection mould, including moving mould subassembly and fixed mould subassembly, fixed mould subassembly includes injection molding device, injection molding device includes hot flow plate and hot nozzle, hot flow plate includes main part and branch part, the branch part of main part both sides is provided with a plurality of interval arrangement branch part, the hot flow plate is divided into the main part and the branch parts, the size and the weight of the hot flow plate can be reduced, the main part and the branch parts are each provided with a hot nozzle, the hot nozzles are used for injecting melt into a mold, in other words, the hot flow plate covers the position where the hot nozzles need to be arranged, materials can be effectively saved, and the weight is reduced; the movable mold assembly comprises square iron and an ejector plate, the square iron is located on the two sides of the ejector plate, a plurality of concave holes are formed in the side, close to the ejector plate, of the square iron, and materials of the square iron are reduced through the concave holes, so that the weight of the square iron is reduced, and the structure of the mold is not changed while materials of a heat flow plate and the square iron are saved; therefore, the strength requirement and the service life of the die are not influenced when the weight is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a lightweight injection mold. Background Art

[0002] With the continuous development of related industries, the size of injection molded parts is increasing, so the size of injection molds is also increasing, and the weight of injection molds is increasing. At present, the overhead crane used to transport injection molds can no longer meet the load-bearing requirements, so the relevant plastic parts need to be outsourced for production, which will increase costs, make the cycle difficult to control and manage, and reduce production efficiency; replacing an overhead crane with a larger load capacity will result in excessive costs and a longer replacement cycle, which will affect production progress; replacing an overhead crane with a larger load capacity will increase the weight of the overhead crane, resulting in severe tests on the load-bearing capacity of the factory building, so the difficulty of transformation will be further increased. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a lightweight injection mold, which significantly reduces the weight of the mold and reduces the cost of transformation.

[0004] A lightweight injection mold according to an embodiment of the utility model includes:

[0005] The fixed mold assembly includes an injection molding device and a fixed mold plate. The injection molding device includes a hot flow plate and a hot nozzle. The hot flow plate is fixed on the fixed mold plate. The hot nozzle is inserted into the fixed mold plate. The hot flow plate has a flow channel connected to the hot nozzle. The hot flow plate includes a main body and a branch part. A plurality of branch parts are arranged at intervals on both sides of the main body. The main body extends along the length direction of the fixed mold plate. The main body and the branch parts are both provided with hot nozzles.

[0006] The movable mold assembly includes a movable mold plate, a square iron and an ejector plate. The square iron is fixedly installed on the side of the movable mold plate facing away from the fixed mold plate. The square iron is located on both sides of the ejector plate. The ejector plate is provided with a plurality of ejector rods inserted into the movable mold plate. A plurality of concave holes are provided on the side of the square iron close to the ejector plate.

[0007] A lightweight injection mold according to an embodiment of the utility model has at least the following beneficial effects: the embodiment is provided with a movable mold component and a fixed mold component, the fixed mold component includes an injection molding device, the injection molding device includes a heat flow plate and a hot nozzle, the heat flow plate includes a main body and a branch part, a plurality of branch parts are arranged at intervals on both sides of the main body, which is beneficial to reducing the volume and weight of the heat flow plate, the main body and the branch parts are both provided with hot nozzles, the hot nozzles are used to inject melt into the mold, that is, the hot flow plate covers the position where the hot nozzle needs to be set, which can effectively save materials and reduce weight; the movable mold component includes a square iron and an ejector plate, the square iron is located on both sides of the ejector plate, and a plurality of concave holes are provided on the side of the square iron close to the ejector plate, and the material of the square iron is reduced by setting the concave holes, thereby reducing the weight of the square iron, and the structure of the mold is not changed when saving the material of the heat flow plate and the square iron, so that the strength requirements and service life of the mold are not affected when reducing the weight.

[0008] According to some embodiments of the present utility model, the fixed mold assembly also includes a cover plate, which is fixedly connected to the fixed mold plate, the heat flow plate is located between the cover plate and the fixed mold plate, and a pouring port connected to the heat flow plate is provided on the cover plate.

[0009] According to some embodiments of the utility model, a heating pipe is embedded on the hot flow plate, and the heating pipe is laid on the two side walls of the hot flow plate facing the cover plate and the fixed mold plate.

[0010] According to some embodiments of the utility model, the branch part includes a first branch and a second branch respectively arranged on both sides of the main body, the first branch is provided with at least two hot nozzles, and the second branch is provided with at least one hot nozzle.

[0011] According to some embodiments of the present invention, the heating pipe is arranged around the outer circumference of the portion of the hot flow plate where the hot nozzle is installed.

[0012] According to some embodiments of the utility model, a wiring tube is provided on the fixed mold plate, the wiring tube is wound around the outer circumference of the heat flux plate, and a plurality of brackets are installed on the wiring tube.

[0013] According to some embodiments of the utility model, a plurality of support blocks arranged on the periphery of the hot flow plate are provided on the top of the fixed mold plate, and the cover plate is installed on the support blocks so that there is space for arranging the injection molding device between the cover plate and the fixed mold plate.

[0014] According to some embodiments of the utility model, the fixed mold plate is further provided with a plurality of auxiliary blocks located between two adjacent branch portions, and the auxiliary blocks are used to support the cover plate.

[0015] According to some embodiments of the present invention, a plurality of pressing blocks are provided on the cover plate, and the end surfaces of the pressing blocks are pressed against the heat flux plate.

[0016] According to some embodiments of the utility model, the movable mold assembly is also provided with a bottom plate, which is fixed on the side of the square iron facing away from the movable mold plate, and there is a space between the bottom plate and the movable mold plate to allow the ejector plate to move, and a plurality of support columns passing through the ejector plate are provided between the bottom plate and the movable mold plate.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0019] Figure 1 It is a first axonometric view of a lightweight injection mold in an embodiment of the utility model;

[0020] Figure 2 It is a second axonometric view of a lightweight injection mold in an embodiment of the utility model;

[0021] Figure 3 for Figure 1 A magnified view of center A;

[0022] Figure 4 It is an axonometric view of a heat flux plate in an embodiment of the utility model;

[0023] Figure 5 It is an axonometric view of the injection molding device in the embodiment of the utility model.

[0024] Reference numerals:

[0025] Fixed mold assembly 100; fixed mold plate 101; cover plate 102; support block 103; auxiliary block 104; pressing block 105; pouring gate 106; wiring tube 107; bracket 108; embedded part 109;

[0026] Hot flow plate 110; hot nozzle 111; driving cylinder 112; main body 113; first branch 114; second branch 115; heating pipe 116; mounting groove 117; surrounding part 118;

[0027] The movable mold assembly 120 ; the movable mold plate 121 ; the square iron 122 ; the ejector plate 123 ; the bottom plate 124 ; the support column 125 ; and the concave hole 126 . DETAILED DESCRIPTION

[0028] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0029] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying 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 operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0031] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0032] Reference Figure 1 and Figure 2 In an embodiment of the utility model, a lightweight injection mold comprises a fixed mold assembly 100 and a movable mold assembly 120. The fixed mold assembly 100 comprises an injection device and a fixed mold plate 101. The movable mold assembly 120 comprises a movable mold plate 121. It can be understood that when the fixed mold plate 101 and the movable mold plate 121 are covered, a mold cavity for forming a workpiece is formed between the two. Figure 5 The injection molding device includes a hot flow plate 110 and a hot nozzle 111. The hot flow plate 110 is fixed on the fixed mold plate 101, and the hot nozzle 111 is inserted in the fixed mold plate 101, and the hot nozzle 111 passes through the fixed mold plate 101 and is connected to the mold cavity. The hot flow plate 110 has a flow channel connected to the hot nozzle 111. It can be understood that during the injection molding process, the melt flows from the flow channel to the hot nozzle 111 and is injected into the mold cavity through the hot nozzle 111. It can be understood that a driving cylinder 112 for controlling the opening and closing of the hot nozzle 111 is provided on the hot flow plate 110, and each hot nozzle 111 is individually controlled by a driving cylinder 112 to achieve fast and accurate opening and closing control of the hot nozzle 111.

[0033] Reference Figure 4 The hot flow plate 110 includes a main body 113 and a branch part. A plurality of branch parts are arranged at intervals on both sides of the main body 113. The main body 113 is connected to the inside of the branch part through a flow channel. The main body 113 extends along the length direction of the fixed mold plate 101. Both the main body 113 and the branch part are provided with hot nozzles 111. It can be understood that a plurality of acupuncture points for injecting melt are provided on the fixed mold plate 101. In the traditional design, the hot flow plate 110 is a plate laid on the fixed mold plate 101, and the hot flow plate 110 covers the positions of all the acupuncture points. In the present application, the hot flow plate 110 is designed as a structure in which the main body 113 and the branch part are connected, and a plurality of branch parts are arranged at intervals, so that the hot flow plate 110 mainly covers the position where the hot nozzle 111 needs to be provided, which can effectively reduce the volume of the hot flow plate 110, save materials and reduce weight. Furthermore, as the size of the workpiece continues to increase, the number of acupuncture points continues to increase, and the production needs can be met by increasing the number or length of branches on the heat flow plate 110, or increasing the length of the main body 113. Therefore, when the size of the workpiece increases, the weight increase of the mold is relatively low, thereby avoiding the problem of the mold being too heavy to be transported.

[0034] Furthermore, the branch portion includes a first branch 114 and a second branch 115 which are respectively arranged on both sides of the main body 113. The first branch 114 is provided with at least two hot nozzles 111, and the second branch 115 is provided with at least one hot nozzle 111. By setting branches of different lengths, the heat flow plate 110 can adapt to the position of the acupuncture points, thereby reducing the excessive increase in volume and weight of the heat flow plate 110 when adding acupuncture points, which is conducive to ensuring lightweight.

[0035] Further, refer to Figure 3 , a heating pipe 116 is embedded in the hot flow plate 110, and the heating pipe 116 is laid on the two side walls of the hot flow plate 110 facing the cover plate 102 and the fixed mold plate 101. It can be understood that the heating pipe 116 is used to insulate and heat the hot flow plate 110, so that the melt in the flow channel always remains in a molten state during the injection molding process, and prevents the melt from cooling and solidifying when flowing through the hot runner. Therefore, the heating pipe 116 is arranged around the periphery of the part of the hot flow plate 110 where the hot nozzle 111 is installed to ensure good temperature control of the area near the hot nozzle 111, thereby ensuring that the melt has good fluidity. It can be understood that the heating pipe 116 is divided into a plurality of surrounding parts 118, and each surrounding part 118 is separately connected to a power supply to ensure accurate temperature control. In the embodiment of the present application, on the first branch 114, each surrounding portion 118 has at least two hot nozzles 111 in the plane range surrounded by the first branch 114, and on the second branch 115, each surrounding portion 118 has at least one hot nozzle 111 in the plane range surrounded by the second branch 115, so as to ensure good heat preservation and heating effects. Figure 4The heat flow plate 110 has a mounting groove 117 for laying a heating pipe 116. The heating pipe 116 is embedded in the mounting groove 117 and does not protrude from the top and bottom walls of the heat flow plate 110 to avoid interference between the heating pipe 116 and other components.

[0036] Reference Figure 2 The fixed mold assembly 100 further includes a cover plate 102, which is fixedly connected to the fixed mold plate 101, and the heat flow plate 110 is located between the cover plate 102 and the fixed mold plate 101. Specifically, a plurality of support blocks 103 arranged on the periphery of the heat flow plate 110 are provided on the top of the fixed mold plate 101, and the cover plate 102 is installed on the support blocks 103, so that there is a space for arranging the injection molding device between the cover plate 102 and the fixed mold plate 101, and the support blocks 103 are installed on the peripheral edge of the fixed mold plate 101, and there is a gap between two adjacent support blocks 103, which helps to reduce the weight while ensuring good connection stability. It can be understood that in the traditional structure, a fixing plate for fixing the heat flow plate 110 is provided on the fixed mold plate 101, and the fixing plate is an integrated whole plate, so the weight of the mold is relatively large. In the present application, the integrated fixing plate is set as a block-type support block 103, and the heat flow plate 110 is independently fixed on the fixed mold plate 101, and there is a gap between the support block 103 and the heat flow plate 110, and between two adjacent support blocks 103, which can effectively reduce the amount of material used, thereby reducing the weight.

[0037] Furthermore, the fixed mold plate 101 is also provided with a plurality of auxiliary blocks 104 located between two adjacent branches. The auxiliary blocks 104 are used to support the cover plate 102. Combined with the support blocks 103, they help to increase the connection stability between the fixed mold plate 101 and the cover plate 102. It is understandable that the auxiliary blocks 104 and the support blocks 103 are connected to the cover plate 102 by bolt connection. At the same time, the auxiliary blocks 104 and the support blocks 103 are connected to the fixed mold plate 101 by bolt connection. It is understandable that the cover plate 102 is provided with a pouring port 106 connected to the heat flow plate 110, and the pouring port 106 is connected to the flow channel in the heat flow plate 110.

[0038] Reference Figure 1 and Figure 3, a wiring tube 107 is provided on the fixed mold plate 101, and the wiring tube 107 is wound around the outer periphery of the hot flow plate 110. It can be understood that a heating tube 116 and a temperature sensor are provided on the hot flow plate 110, and the power line of the heating tube 116 and the wire of the temperature sensor can be accommodated in the wiring tube 107. Further, the wiring tube 107 is provided with an embedded portion 109 located between two adjacent branches to increase the guidance of the wire. Furthermore, a plurality of brackets 108 are installed on the wiring tube 107, and the bracket 108 is a hollow structure. Since a plurality of drive rod cylinders for driving the hot nozzle 111 are provided on the hot flow plate 110, the hydraulic oil pipe can pass through the bracket 108 and be fixed to the wiring tube 107 through the bracket 108. It is understandable that during actual installation, wires can be arranged in advance in the wiring tube 107 and the hydraulic oil pipe can be fixed on the top outer wall of the wiring tube 107. The pipeline and the wiring tube 107 can be installed on the fixed template 101 in an integrated manner, which is conducive to improving installation efficiency.

[0039] Furthermore, a plurality of pressing blocks 105 are provided on the cover plate 102, and the pressing blocks 105 are fixed to the inner wall of the cover plate 102 by bolt connection. The end faces of the pressing blocks 105 are pressed against the heat flow plate 110, and the pressing blocks 105 are located in the gap between two adjacent driving cylinders 112, which is beneficial to maintaining good rigidity of the cover plate 102 while reducing the use of materials, thereby keeping the mold lightweight.

[0040] Reference Figure 2 The movable mold assembly 120 includes a square iron 122 and an ejector plate 123. The square iron 122 is fixedly mounted on the side of the movable mold plate 121 facing away from the fixed mold plate 101, and the square iron 122 is located on both sides of the ejector plate 123. Further, the movable mold assembly 120 is also provided with a bottom plate 124, which is fixed on the side of the square iron 122 facing away from the movable mold plate 121. There is a space between the bottom plate 124 and the movable mold plate 121 to allow the ejector plate 123 to move. A plurality of support columns 125 penetrating the ejector plate 123 are provided between the bottom plate 124 and the movable mold plate 121. The two ends of the support column 125 are respectively connected to the movable mold plate 121 and the bottom plate 124. The guide column support column 125 can be used for guiding the movement of the ejector plate 123 to ensure that the ejector plate 123 can move stably. Furthermore, the ejector plate 123 is provided with a plurality of ejector rods (not shown in the figure) inserted into the movable template 121. It can be understood that the ejector rods are movably inserted into the movable template 121. After the casting is completed, the ejector plate 123 is moved to drive the ejector rods to eject the workpiece, thereby realizing automatic demolding.

[0041] Reference Figure 2A plurality of recessed holes 126 are provided on one side of the square iron 122 close to the ejector plate 123, and the plurality of recessed holes 126 are arranged at intervals along the length direction of the square iron. By providing a plurality of recessed holes 126, the material of the square iron 122 can be reduced, thereby reducing the weight of the square iron 122. When saving materials, the structure of the mold is not changed, that is, the structure of the movable mold plate 121 and the fixed mold plate 101 is not changed, so that when reducing the weight, the strength requirements and service life of the mold are not affected, thereby achieving the effect of reducing the transformation cost.

[0042] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A lightweight injection mold, characterized in that: include: A fixed mold assembly, comprising an injection molding device and a fixed mold plate, wherein the injection molding device comprises a hot flow plate and a hot nozzle, wherein the hot flow plate is fixed on the fixed mold plate, wherein the hot nozzle is plugged into the fixed mold plate, wherein the hot flow plate has a flow channel in communication with the hot nozzle, wherein the hot flow plate comprises a main body and a branch portion, wherein a plurality of branch portions are arranged at intervals on both sides of the main body, wherein the main body extends along the length direction of the fixed mold plate, and wherein the main body and the branch portion are both provided with the hot nozzle; The movable mold assembly includes a movable mold plate, a square iron and an ejector plate. The square iron is fixedly installed on the side of the movable mold plate facing away from the fixed mold plate. The square iron is located on both sides of the ejector plate. The ejector plate is provided with a plurality of ejector rods inserted into the movable mold plate. A plurality of concave holes are provided on the side of the square iron close to the ejector plate.

2. A lightweight injection mold according to claim 1, characterized in that: The fixed mold assembly also includes a cover plate, which is fixedly connected to the fixed mold plate. The heat flow plate is located between the cover plate and the fixed mold plate. A pouring port connected to the heat flow plate is provided on the cover plate.

3. A lightweight injection mold according to claim 2, characterized in that: The heat flow plate is embedded with a heating pipe, and the heating pipe is laid on the two side walls of the heat flow plate facing the cover plate and the fixed mold plate.

4. A lightweight injection mold according to claim 1, characterized in that: The branch part includes a first branch and a second branch respectively arranged on both sides of the main body, the first branch is provided with at least two hot nozzles, and the second branch is provided with at least one hot nozzle.

5. A lightweight injection mold according to claim 3, characterized in that: The heating pipe is arranged around the outer circumference of the portion of the hot flow plate where the hot nozzle is installed.

6. A lightweight injection mold according to claim 1, characterized in that: The fixed mold plate is provided with a wiring tube, the wiring tube is arranged around the outer periphery of the heat flow plate, and a plurality of brackets are installed on the wiring tube.

7. A lightweight injection mold according to claim 2, characterized in that: The top of the fixed mold plate is provided with a plurality of support blocks arranged on the periphery of the hot flow plate, and the cover plate is installed on the support blocks so that there is a space for arranging the injection molding device between the cover plate and the fixed mold plate.

8. A lightweight injection mold according to claim 7, characterized in that: The fixed template is also provided with a plurality of auxiliary blocks located between two adjacent branch portions, and the auxiliary blocks are used to support the cover plate.

9. A lightweight injection mold according to claim 2, characterized in that: The cover plate is provided with a plurality of pressing blocks, and the end surfaces of the pressing blocks are pressed against the heat flow plate.

10. The lightweight injection mold according to claim 1, characterized in that: The movable mold assembly is also provided with a bottom plate, which is fixed on the side of the square iron facing away from the movable mold plate. There is a space between the bottom plate and the movable mold plate to allow the ejector plate to move. A plurality of support columns penetrating the ejector plate are provided between the bottom plate and the movable mold plate.

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