A cooling structure of supercritical foaming molding machine

Abstract

The invention discloses a cooling structure of a supercritical foaming molding machine, and relates to the technical field of supercritical foaming molding. The invention comprises a base, an injection piece is fixed on the upper end surface of the base, and a feed port is fixed on the injection piece; a fixing frame is fixed on the base; a conversion assembly is fixed on the lower end surface of the fixing frame; a molding assembly is slidably arranged on the conversion assembly; a driving assembly is installed in the fixing frame and connected to the molding assembly through a connecting column; wherein the conversion assembly comprises a supporting seat, a rotating motor is fixed on the supporting seat, a rotating bin is fixed on the output end of the rotating motor, two supporting frames are symmetrically fixed in the rotating bin, linear motors are fixed on the two supporting frames, and a connecting block is fixed on the output end of the linear motor; in the invention, the molding assembly can be turned over by the conversion assembly, so that the molding assemblies can be used alternately, thereby improving the cooling effect.

Description

Technical Field

[0001] The invention relates to the technical field of foaming supercritical foaming molding, in particular to a cooling structure of a supercritical foaming molding machine. Background Art

[0002] Supercritical foaming molding is a physical foaming molding technology, and also a microcellular foaming molding technology. In the injection molding, extrusion and blow molding processes, supercritical carbon dioxide or nitrogen or other gases are first injected into a special plasticizing device to allow the gas to be fully and evenly mixed / diffused with the molten raw materials to form a single-phase mixed sol. The sol is then introduced into the mold cavity or extrusion die to produce a large pressure drop in the sol, so that the gas precipitates to form a large number of bubble nuclei; in the subsequent cooling and molding process, the bubble nuclei inside the sol continue to grow and form, and finally a microcellular foamed plastic product is obtained.

[0003] Existing supercritical foaming molding machines all use one mold for processing during cooling and molding. The sol will carry heat into the cavity. At this time, the temperature of the cavity after cooling is low. Contact with the sol carrying heat will cause local cooling of the sol, which is easy to form a thin film in the cavity, affecting the molding effect. In addition, when cooling the cavity, the waste heat generated by the cavity cannot be utilized, resulting in high heat in the surrounding environment, thereby affecting the cooling efficiency.

[0004] In view of the above problems, the present invention provides a cooling structure of a supercritical foaming molding machine to solve the above problems. Summary of the invention

[0005] To achieve the above object, the present invention provides the following technical solution: a cooling structure of a supercritical foaming molding machine, comprising:

[0006] A base, an injection piece is fixed on its upper end surface, and a feed port is fixed on the injection piece;

[0007] A fixing frame, fixed on the base;

[0008] A conversion assembly, fixed to the lower end surface of the fixing frame;

[0009] A molding assembly, slidably disposed on the conversion assembly;

[0010] A driving assembly, installed in the fixing frame and connected to the forming assembly via a connecting column;

[0011] Among them, the conversion assembly includes a support base, a rotating motor is fixed on the support base, a rotating bin is fixed on the output end of the rotating motor, two support frames are symmetrically fixed in the rotating bin, a linear motor is fixed on both support frames, and a connecting block is fixed on the output end of the linear motor.

[0012] Further, preferably, a plurality of brackets are fixed on the support seat, and a stabilizing wheel is rotatably provided on the bracket. The stabilizing wheel fits the outer wall of the rotating bin, and the rotating bin is located below the molding assembly.

[0013] Further, preferably, the molding assembly comprises:

[0014] A bearing plate, fixed on the connecting block;

[0015] The movable platen is configured as two and symmetrically fixed on the bearing plate;

[0016] A circulation assembly is fixed on the two movable templates;

[0017] A support plate, fixed to the upper end surface of the movable template;

[0018] The fixed platen is configured as two, both of which are slidably arranged on the supporting plate and symmetrically arranged on both sides of the movable platen;

[0019] The guide seats are configured in four pieces and are symmetrically fixed on the fixed template;

[0020] The driving screw is configured as two and is rotatably arranged in the guide seat, and its axial direction is the same as the sliding direction of the movable template.

[0021] Further, preferably, connecting columns are fixed to both ends of the driving screw, and limiting grooves are provided on the connecting columns.

[0022] Further, preferably, the driving assembly at least includes a driving motor and a telescopic motor, the telescopic motor is rotatably arranged in the fixed frame, the driving motor is fixed in the fixed frame, and the output end of the driving motor is connected to the telescopic motor by a synchronous belt, a positioning column is fixed at the output end of the telescopic motor, a limiting plate is provided on the positioning column, and the limiting plate corresponds to the limiting groove.

[0023] Further, preferably, the circulation component comprises:

[0024] The cooling chamber is configured as two and symmetrically fixed on the two movable templates;

[0025] A circulation fan is fixed in the cooling bin, and the wind directions of the circulation fans in the two cooling bins are opposite;

[0026] The connecting pipe is fixed at both ends of the circulation fan and is connected with the moving template.

[0027] Further, preferably, one of the circulating fans is connected to an external cooling device, a cooling water channel is provided inside the movable template, the cooling water channel is connected to an external water supply device, a circulation channel is also provided inside the movable template, the circulation channel is connected to the connecting pipe, and the circulation channel is arranged in close contact with the cooling water channel.

[0028] Compared with the prior art, the present invention provides a supercritical foaming molding machine cooling structure, which has the following beneficial effects:

[0029] The present invention can flip the molding components through the conversion component, so that the molding components can be used alternately to improve the cooling effect. That is, when the injection part completes foaming, the sol will carry heat into between the movable mold plate and the fixed mold plate. At this time, the movable mold plate can be preheated through the circulation component to avoid local cooling of the sol, thereby forming a thin film in the cavity and affecting the molding effect. Afterwards, double cooling can be performed through the circulation component and the cooling water channel, and the residual heat can be collected through the circulation component during cooling, so as to preheat the next molding group and improve the utilization rate of the residual heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of a cooling structure of a supercritical foaming molding machine;

[0031] Figure 2 It is a structural schematic diagram of a conversion component in a cooling structure of a supercritical foaming molding machine;

[0032] Figure 3 It is a structural schematic diagram of a molding component in a cooling structure of a supercritical foaming molding machine;

[0033] Figure 4 It is a structural schematic diagram of a circulation component in a cooling structure of a supercritical foaming molding machine;

[0034] In the figure: 1. base; 2. injection part; 3. feed port; 4. fixing frame; 5. conversion assembly; 6. molding assembly; 7. connecting column; 8. driving assembly; 51. support seat; 52. rotating motor; 53. rotating bin; 54. stabilizing wheel; 55. support frame; 56. linear motor; 57. connecting block; 61. bearing plate; 62. moving template; 63. circulation assembly; 64. supporting plate; 65. fixed template; 66. guide seat; 67. driving screw; 71. limiting groove; 621. cooling water channel; 622. circulation channel; 631. cooling bin; 632. circulation fan; 633. connecting pipe. DETAILED DESCRIPTION

[0035] Reference Figure 1-Figure 4 The present invention provides a technical solution: a cooling structure of a supercritical foaming molding machine, comprising:

[0036] A base 1, an injection piece 2 is fixed on its upper end surface, and a feed port 3 is fixed on the injection piece 2;

[0037] A fixing frame 4, fixed on the base 1;

[0038] A conversion assembly 5, fixed on the lower end surface of the fixing frame 4;

[0039] A molding component 6, slidably disposed on the conversion component 5;

[0040] A driving assembly 8 is installed in the fixing frame 4 and connected to the forming assembly 6 via a connecting column 7;

[0041] Among them, the conversion component 5 includes a support base 51, a rotating motor 52 is fixed on the support base 51, a rotating bin 53 is fixed on the output end of the rotating motor 52, two support frames 55 are symmetrically fixed in the rotating bin 53, a linear motor 56 is fixed on both of the support frames 55, and a connecting block 57 is fixed on the output end of the linear motor 56.

[0042] That is to say, the forming assembly 6 can be turned over by the conversion assembly 5, so that the forming assembly 6 can be used alternately to improve the cooling effect.

[0043] In this embodiment, a plurality of brackets are fixed on the support seat 51 , and a stabilizing wheel 54 is rotatably provided on the bracket. The stabilizing wheel 54 is in contact with the outer wall of the rotating bin 53 , and the rotating bin 53 is located below the molding assembly 6 .

[0044] The stabilizing wheel 54 can improve the stability of the rotating bin 53, thereby preventing the foamed sol from shifting in the molding assembly 6, and the rotating bin 53 can also collect the residual materials in a centralized manner, thereby improving the utilization efficiency of the residual materials.

[0045] In this embodiment, the molding assembly 6 includes:

[0046] A carrying plate 61, fixed on the connecting block 57;

[0047] The movable platen 62 is configured as two and symmetrically fixed on the carrying plate 61;

[0048] A circulation assembly 63, fixed on the two movable templates 62;

[0049] A support plate 64 is fixed to the upper end surface of the movable plate 62;

[0050] The fixed platen 65 is configured as two, both of which are slidably disposed on the support plate 64 and symmetrically disposed on both sides of the movable platen 62;

[0051] The guide seats 66 are configured in four pieces and are symmetrically fixed on the fixed template 65;

[0052] The driving screws 67 are configured as two and are rotatably disposed in the guide seat 66 , and their axial directions are the same as the sliding direction of the movable plate 62 .

[0053] As a preferred embodiment, connecting columns 7 are fixed to both ends of the driving screw rod 67 , and limiting grooves 71 are provided on the connecting columns 7 .

[0054] As a preferred embodiment, the driving component 8 at least includes a driving motor and a telescopic motor, the telescopic motor is rotatably arranged in the fixed frame 4, the driving motor is fixed in the fixed frame 4, and the output end of the driving motor is connected to the telescopic motor by a synchronous belt, and a positioning column is fixed at the output end of the telescopic motor, and a limiting plate is provided on the positioning column, and the limiting plate corresponds to the limiting groove 71.

[0055] It should be noted that when molding is carried out, a fixed mold plate 65 of the molding assembly 6 is first sealed and connected to the output port of the injection piece 2 through the linear motor 56, and then the positioning column and the connecting column 7 are limited by the telescopic motor, and then the movable mold plate 62 is fit with the fixed mold plate 65 through the driving motor. At this time, extrusion molding begins, and the movable mold plate 62 is preheated by the circulation assembly 63.

[0056] As a preferred embodiment, the circulation component 63 includes:

[0057] The cooling chamber 631 is configured as two and symmetrically fixed on the two movable templates 62;

[0058] The circulation fan 632 is fixed in the cooling chamber 631, and the wind directions of the circulation fans 632 in the two cooling chambers 631 are opposite;

[0059] The connecting pipe 633 is fixed at both ends of the circulation fan 632 and is connected to the movable plate 62 .

[0060] That is to say, after the injection part 2 completes foaming, the sol will carry heat into between the movable mold plate 62 and the fixed mold plate 65. At this time, the movable mold plate 62 can be preheated through the circulation component 63, thereby avoiding local cooling of the sol, thereby forming a thin film in the cavity and affecting the molding effect.

[0061] As a preferred embodiment, one of the circulating fans 632 is connected to an external cooling device, a cooling water channel 621 is opened inside the movable template 62, and the cooling water channel 621 is connected to an external water supply device. A circulating channel 622 is also opened inside the movable template 62, and the circulating channel 622 is connected to the connecting pipe 633, and the circulating channel 622 is arranged in close contact with the cooling water channel 621.

[0062] The double cooling is performed by the circulation component 63 and the cooling water channel 621, and the residual heat is collected by the circulation component 63 during cooling, so as to preheat the next group of molding, thereby improving the utilization rate of the residual heat.

[0063] Specifically, first, the material is discharged through the feed port 3, then foamed and transported through the injection piece 2, and then molded through the molding component 6. During molding, a fixed mold plate 65 of the molding component 6 is first sealed and connected to the output port of the injection piece 2 through the linear motor 56, and then the positioning column and the connecting column 7 are limited by the telescopic motor, and then the movable mold plate 62 is fitted with the fixed mold plate 65 through the driving motor. At this time, extrusion molding begins, and the movable mold plate 62 is preheated by the circulation component 63. When cooling is required, dual cooling is performed through the circulation component 63 and the cooling water channel 621, and the residual heat is collected by the circulation component 63 during cooling, so as to preheat the next molding group and improve the utilization rate of the residual heat.

[0064] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A cooling structure of a supercritical foaming molding machine, characterized in that: include: A base (1) having an injection piece (2) fixed on its upper end surface, wherein a feed port (3) is fixed on the injection piece (2); A fixing frame (4) fixed on the base (1); A conversion assembly (5) fixed to the lower end surface of the fixing frame (4); A molding component (6) slidably disposed on the conversion component (5); A driving assembly (8) is installed in the fixing frame (4) and connected to the forming assembly (6) via a connecting column (7); The conversion assembly (5) comprises a support seat (51), a rotating motor (52) is fixed on the support seat (51), a rotating bin (53) is fixed at the output end of the rotating motor (52), two supporting frames (55) are symmetrically fixed in the rotating bin (53), a linear motor (56) is fixed on each of the two supporting frames (55), and a connecting block (57) is fixed at the output end of the linear motor (56); The molding component (6) comprises: A bearing plate (61) fixed on the connecting block (57); The movable platen (62) is configured as two and symmetrically fixed on the carrying plate (61); A circulation assembly (63) fixed on the two movable templates (62); A support plate (64) fixed to the upper end surface of the movable plate (62); The fixed platen (65) is configured as two plates, both of which are slidably disposed on the support plate (64) and symmetrically disposed on both sides of the movable platen (62); The guide seats (66) are configured in four numbers and are symmetrically fixed on the fixed template (65); Two driving screws (67) are configured and rotatably disposed in the guide seat (66), and the axial direction of the driving screws (67) is the same as the sliding direction of the movable plate (62); The circulation component (63) comprises: The cooling chamber (631) is configured as two and is symmetrically fixed on the two movable mold plates (62); A circulation fan (632) is fixed in the cooling bin (631), and the wind directions of the circulation fans (632) in the two cooling bins (631) are opposite; A connecting pipe (633) is fixed at both ends of the circulation fan (632) and is connected to the movable die plate (62); One of the circulating fans (632) is connected to an external cooling device, a cooling water channel (621) is provided inside the movable template (62), the cooling water channel (621) is connected to an external water supply device, a circulating channel (622) is also provided inside the movable template (62), the circulating channel (622) is connected to the connecting pipe (633), and the circulating channel (622) is arranged to fit the cooling water channel (621).

2. A supercritical foaming molding machine cooling structure according to claim 1, characterized in that: A plurality of brackets are fixed on the support seat (51), and a stabilizing wheel (54) is rotatably arranged on the bracket. The stabilizing wheel (54) fits the outer wall of the rotating bin (53), and the rotating bin (53) is located below the molding assembly (6).

3. The cooling structure of a supercritical foaming molding machine according to claim 1, characterized in that: Connecting columns (7) are fixed to both ends of the driving screw rod (67), and limiting grooves (71) are provided on the connecting columns (7).

4. A supercritical foaming molding machine cooling structure according to claim 3, characterized in that: The driving assembly (8) comprises at least a driving motor and a telescopic motor, the telescopic motor being rotatably arranged in the fixing frame (4), the driving motor being fixed in the fixing frame (4), and the output end of the driving motor being connected to the telescopic motor by a synchronous belt, the output end of the telescopic motor being fixed with a positioning column, the positioning column being provided with a limiting plate, the limiting plate corresponding to the limiting groove (71).

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