Heating device for injection mold

Abstract

The utility model relates to a heating device for an injection mold, which comprises a heating system and a mold, the mold comprises a lower mold, and a mold core is arranged in a lower mold cavity of the lower mold; the heating system comprises an electric heating box and a heat conducting plate, the heat conducting plate is located in the lower mold cavity below the mold cores and makes contact with the mold cores above, and the electric heating box is electrically connected with the heat conducting plate through an electric heating connecting wire; a plurality of electric heating connecting wire guiding cavities which are connected together and distributed in a snake shape are formed in the heat conduction plate, and the electric heating connecting wires are distributed in the electric heating connecting wire guiding cavities. According to the utility model, through the structural arrangement of the electric heating box, the electric heating connecting wire and the heat conducting plate, the mold core in the lower mold cavity can be quickly heated, and the heating efficiency is higher.

Description

Technical Field

[0001] The utility model relates to the technical field related to injection molds, and in particular to a heating device for injection molds. Background Art

[0002] Injection molding is one of the most widely used plastic molding methods. In the injection molding process, the molten plastic will be injected into the mold cavity to give it a certain shape, and then cooled and shaped in the mold cavity. Since the molding and cooling of the plastic melt are all completed in the mold cavity, the mold cavity temperature control has a very important influence on the quality and molding cycle of the final injection molded product. The mold temperature is also one of the most important parameters in the injection molding process.

[0003] After massive search, it was found that the prior art publication number is CN211363357U, which discloses a rapid heating and cooling system for injection molds, including a fixed mold base plate, a guide column is arranged at the upper end of the fixed mold base plate, a fixed mold core is arranged on the inner side of the upper end of the fixed mold base plate near the guide column, a movable mold plate is arranged on the outer side of the guide column, and two sets of connecting mechanisms are arranged at one end of the fixed mold core, a cooling water outlet pipe is arranged at one end of the connecting mechanism, a circulating water pump is arranged at one end of the cooling water outlet pipe, a water storage tank is arranged on the outer side of the circulating water pump, a fixed groove is arranged inside the movable mold plate, a spiral resistance wire is arranged on the inner side of the fixed groove, and a fixed plate is arranged at the upper end of the fixed groove. The rapid heating and cooling system for injection molds described in the utility model has good sealing between the cooling water outlet pipe and the fixed mold core, is not easy to leak, has good heating effect, and is convenient for replacing the spiral resistance wire inside the fixed groove.

[0004] In summary, the existing injection mold heating treatment is generally carried out through a mold temperature controller. The pump in the power transmission system allows the hot fluid to reach the mold from a water tank equipped with a built-in heater and cooler, and then return from the mold to the water tank. This heating method requires a large equipment investment and floor space, and the heating rate is slow and the heating efficiency is relatively low.

[0005] In view of the above-mentioned defects, the designer actively carried out research and innovation in order to create a heating device for injection molds to make it more valuable for industrial use. Utility Model Content

[0006] In order to solve any of the above technical problems, the purpose of the utility model is to provide a heating device for an injection mold.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A heating device for an injection mold comprises a heating system and a mold, wherein the mold comprises a lower mold, and a mold core is arranged in a lower mold cavity of the lower mold;

[0009] The heating system includes an electric heating box and a heat conducting plate. The heat conducting plate is located in the lower mold cavity below the mold core, and the heat conducting plate is in contact with the upper mold core. The electric heating box is electrically connected to the heat conducting plate through an electric heating connecting line.

[0010] A plurality of electric heating connection line guide cavities which are interconnected and distributed in a serpentine shape are arranged in the heat conducting plate, and the electric heating connection lines are distributed in the electric heating connection line guide cavities.

[0011] As a further improvement of the utility model, a first heat-insulating shell is arranged in the lower mold cavity outside the heat-conducting plate.

[0012] As a further improvement of the utility model, a plurality of electric heating connection wire holes connected to the lower mold cavity are arranged on the lower mold, and the electric heating connection wires can enter the lower mold cavity through the electric heating connection wire holes.

[0013] As a further improvement of the utility model, an upper insulating support layer and a lower insulating support layer are respectively arranged in the electric heating connection line holes on the upper and lower sides of the electric heating connection line.

[0014] As a further improvement of the utility model, at least one group of contact bumps is arranged on the top of the heat conducting plate, and contact grooves contacting the contact bumps are arranged in the mold core just above the contact bumps.

[0015] As a further improvement of the utility model, a plurality of positioning columns are arranged at the bottom of the mold core, and positioning holes matched with the positioning columns are arranged on the heat conducting plate directly below the positioning columns.

[0016] As a further improvement of the utility model, the mold core includes a mold core body and a second heat-insulating shell located outside the mold core body.

[0017] As a further improvement of the utility model, a plurality of docking blocks are arranged on the outer side of the core body, and a plurality of docking grooves matched with the above-mentioned docking blocks are arranged on the inner side of the second heat-insulating outer shell.

[0018] As a further improvement of the present invention, the docking block can be inserted into the docking groove along the vertical direction.

[0019] By means of the above solution, the utility model has at least the following advantages:

[0020] The utility model can quickly heat the mold core in the lower mold cavity through the structural arrangement of the electric heating box, the electric heating connecting wire and the heat conducting plate, and the heating efficiency is high;

[0021] The utility model can block the heat from being conducted outwards by means of the structural arrangement of multiple heat-insulating shells.

[0022] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is a schematic structural diagram of a heating device for an injection mold of the utility model;

[0025] Figure 2 yes Figure 1 Schematic diagram of the internal structure of the middle mold;

[0026] Figure 3 yes Figure 2 Schematic diagram of the installation structure of the middle heat conducting plate and the mold core;

[0027] Figure 4 yes Figure 2 Schematic diagram of the internal structure of the middle heat conducting plate;

[0028] Figure 5 yes Figure 2 Top view of the center mold core.

[0029] The meanings of the various reference numerals in the figures are as follows.

[0030] Electric heating box 1, electric heating connecting line 2, mold 3, lower mold 4, lower mold cavity 5, first thermal insulation shell 6, heat conducting plate 7, mold core 8, electric heating connecting line hole 9, upper insulating support layer 10, lower insulating support layer 11, contact protrusion 12, contact groove 13, positioning column 14, positioning hole 15, electric heating connecting line guide cavity 16, mold core body 17, second thermal insulation shell 18, docking block 19, docking groove 20. DETAILED DESCRIPTION

[0031] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0032] In order to make the technical personnel in the technical field better understand the scheme of the utility model, the technical scheme in the embodiment of the utility model will be clearly and completely described below in combination with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, rather than all the embodiments. The components of the embodiment of the utility model usually described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the utility model for protection, but only represents the selected embodiment of the utility model. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the utility model.

[0033] Example

[0034] like Figure 1 to Figure 5 As shown,

[0035] A heating device for an injection mold comprises a heating system and a mold 3. The mold 3 comprises a lower mold 4. A mold core 8 is arranged in a lower mold cavity 5 of the lower mold 4.

[0036] 1. The main structural components of the heating system:

[0037] The heating system includes an electric heating box 1 and a heat conducting plate 7. The heat conducting plate 7 is located in the lower mold cavity 5 below the mold core 8, and the heat conducting plate 7 is in contact with the mold core 8 above. A plurality of positioning posts 14 are provided at the bottom of the mold core 8, and positioning holes 15 adapted to the positioning posts 14 are provided on the heat conducting plate 7 directly below the positioning posts 14. The electric heating box 1 is electrically connected to the heat conducting plate 7 through the electric heating connecting wire 2. A plurality of electric heating connecting wire guide cavities 16 connected to each other and distributed in a serpentine shape are provided in the heat conducting plate 7, and the electric heating connecting wire 2 is distributed in the electric heating connecting wire guide cavity 16.

[0038] 2. Connection structure of electric heating connecting wire 2:

[0039] The lower mold 4 is provided with a plurality of electric heating connection wire holes 9 connected with the lower mold cavity 5, and the electric heating connection wire 2 can enter the lower mold cavity 5 through the electric heating connection wire holes 9. An upper insulating support layer 10 and a lower insulating support layer 11 are respectively provided in the electric heating connection wire holes 9 on the upper and lower sides of the electric heating connection wire 2.

[0040] 3. Contact structure between heat conducting plate 7 and mold core 8:

[0041] At least one group of contact bumps 12 is arranged on the top of the heat conducting plate 7 , and contact grooves 13 contacting the contact bumps 12 are arranged in the mold core 8 just above the contact bumps 12 .

[0042] 4. Thermal insulation components:

[0043] 1. A first heat-insulating outer shell 6 is arranged in the lower mold cavity 5 outside the heat-conducting plate 7.

[0044] 2. The mold core 8 includes a mold core body 17 and a second heat-insulating shell 18 located outside the mold core body 17 .

[0045] A plurality of docking blocks 19 are arranged on the outer side of the core body 17, and a plurality of docking grooves 20 adapted to the docking blocks 19 are arranged on the inner side of the second heat-insulating shell 18. The docking blocks 19 can be inserted into the docking grooves 20 along the vertical direction.

[0046] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model 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 a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implying the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0047] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "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, it can be an electrical connection, it can be a direct connection, it can be an indirect connection through an intermediate medium, and 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 utility model can be understood according to specific circumstances.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as within the protection scope of the present invention.

Claims

1. A heating device for an injection mold, comprising a heating system and a mold (3), wherein the mold (3) comprises a lower mold (4), and a mold core (8) is arranged in a lower mold cavity (5) of the lower mold (4); Features: The heating system comprises an electric heating box (1) and a heat conducting plate (7), wherein the heat conducting plate (7) is located in a lower mold cavity (5) below a mold core (8), and the heat conducting plate (7) is in contact with the mold core (8) above, and the electric heating box (1) is electrically connected to the heat conducting plate (7) via an electric heating connecting line (2); A plurality of electric heating connection line guide cavities (16) which are interconnected and distributed in a serpentine shape are arranged in the heat conducting plate (7), and the electric heating connection line (2) is distributed in the electric heating connection line guide cavities (16).

2. A heating device for an injection mold according to claim 1, characterized in that: A first heat-insulating outer shell (6) is arranged in the lower mold cavity (5) outside the heat-conducting plate (7).

3. A heating device for an injection mold according to claim 1, characterized in that: The lower mold (4) is provided with a plurality of electric heating connection wire holes (9) which are connected to the lower mold cavity (5), and the electric heating connection wire (2) can enter the lower mold cavity (5) through the electric heating connection wire holes (9).

4. A heating device for an injection mold as claimed in claim 3, characterized in that: An upper insulating support layer (10) and a lower insulating support layer (11) are respectively arranged in the electric heating connection line holes (9) on the upper and lower sides of the electric heating connection line (2).

5. A heating device for an injection mold according to claim 1, characterized in that: At least one group of contact bumps (12) is arranged on the top of the heat conducting plate (7), and a contact groove (13) in contact with the contact bumps (12) is arranged in the mold core (8) directly above the contact bumps (12).

6. A heating device for an injection mold according to claim 1, characterized in that: A plurality of positioning columns (14) are arranged at the bottom of the mold core (8), and positioning holes (15) matching the positioning columns (14) are arranged on the heat conducting plate (7) directly below the positioning columns (14).

7. A heating device for an injection mold according to claim 1, characterized in that: The mold core (8) comprises a mold core body (17) and a second heat-insulating shell (18) located outside the mold core body (17).

8. A heating device for an injection mold according to claim 7, characterized in that: A plurality of docking blocks (19) are arranged on the outer side of the core body (17), and a plurality of docking grooves (20) adapted to the docking blocks (19) are arranged on the inner side of the second heat-insulating outer shell (18).

9. A heating device for an injection mold according to claim 8, characterized in that: The docking block (19) can be inserted into the docking groove (20) along the vertical direction.

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