Thermal forming mechanism for plastic sheet

Abstract

The utility model discloses a thermoforming mechanism for plastic sheets, which comprises a thermoforming die and further comprises a forming cooling mechanism, the forming cooling mechanism comprises an L-shaped mounting plate, a vertical support plate, a bottom connecting plate, an electric push rod, a bottom connecting disc, a hollow box, a side hollow cylinder, an air supply pipe and an air box, the L-shaped mounting plate is locked outside a shell of the thermoforming die through a bolt, and the vertical support plate is fixed on the L-shaped mounting plate. The forming cooling mechanism is arranged at the position of the thermal forming mold for thermal forming of the plastic sheet, and the forming cooling mechanism enables the thermal forming mold to have an air cooling structure capable of adjusting the position during plastic suction forming after the plastic sheet is heated, so that the plastic sheet to be formed in the thermal forming mold is blown and cooled during thermal forming of the plastic sheet; and cooling of the inner concave surface of the to-be-formed plastic sheet in the thermal forming mold is accelerated, so that the to-be-formed plastic sheet in the thermal forming mold can be rapidly formed, and the thermal forming processing efficiency of the plastic sheet is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of thermoforming of plastic sheets, and particularly relates to a thermoforming mechanism for plastic sheets. Background Technique

[0002] Thermoforming is a forming method in which a thermoplastic sheet is heated to soften and then made into a product under gas pressure, liquid pressure or mechanical pressure by using an appropriate mold or fixture. Plastic sheet compression molding usually uses a single mold (male mold or female mold) or a pair of molds, and uses external mechanical pressure or self-weight to form the sheet into various products. This method is applicable to all thermoplastic plastics.

[0003] At present, when a plastic sheet is thermoformed, the plastic sheet is heated and softened and then placed in a thermoforming mold for thermoforming. However, when this thermoforming mold is used for thermoforming a plastic sheet, a cooling pipeline is usually arranged in the thermoforming mold to assist the thermoforming mold to quickly cool the thermoformed plastic sheet. However, this thermoforming mold only relies on the temperature reduction at the thermoforming mold to cool the sheet in contact with the mold after thermoforming, and the cooling of the concave surface in the plastic mold relies on natural cooling, resulting in a longer take-out time of the plastic sheet after thermoforming. Therefore, we propose a thermoforming mechanism for plastic sheets. Content of the Utility Model

[0004] The main purpose of the utility model is to provide a thermoforming mechanism for plastic sheets. An in-molding cooling mechanism is arranged at the thermoforming mold for thermoforming plastic sheets. The in-molding cooling mechanism enables the thermoforming mold to have an air-cooling structure with adjustable position during the thermoforming of the plastic sheet after heating, so that when the plastic sheet is thermoformed, air is blown to cool the plastic sheet to be formed in the thermoforming mold, accelerating the cooling of the concave surface of the plastic sheet to be formed in the thermoforming mold, so that the plastic sheet to be formed in the thermoforming mold can be quickly formed, greatly improving the thermoforming processing efficiency of the plastic sheet, and effectively solving the problems in the background technique.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A thermoforming mechanism for plastic sheets, including a thermoforming mold, further includes a forming and cooling mechanism. The forming and cooling mechanism includes an L-shaped mounting plate, a vertical support plate, a bottom connecting plate, an electric push rod, a bottom connecting disc, a hollow box, side empty cylinders, an air supply pipe, and an air box. The L-shaped mounting plate is bolted and locked outside the shell of the thermoforming mold, and the other side plate body of the L-shaped mounting plate is vertically welded with a vertical support plate higher than the thermoforming mold. The outer surface of the upper end plate body of the vertical support plate is bolted and locked with a bottom connecting plate welded outside the electric push rod, and the telescopic rod head of the electric push rod is bolted and locked with a bottom connecting disc welded at the bottom of the hollow box. The two side box openings of the hollow box are interconnected and welded with side empty cylinders, and the bottom of the side empty cylinder body is provided with a bottom opening. The lower box wall of the hollow box is welded and interconnected with a bottom discharge pipe. An air supply pipe is interconnected and welded outside the hollow box above the bottom connecting disc, and the end pipe body of the air supply pipe away from the hollow box is interconnected and welded with a narrow connecting frame. The outer frame plate of the narrow connecting frame is interconnected and welded with an air box. The two side box walls of the air box away from the narrow connecting frame are provided with air inlets, and a fan is installed on the surface of the air box outside the air inlets.

[0007] Further, a disc hole is provided in the disc body of the bottom connecting disc, and a bolt is screwed between the disc hole of the bottom connecting disc and the telescopic rod head of the electric push rod;

[0008] By adopting the above technical solution, the bottom connecting disc can be locked with the telescopic rod head of the electric push rod by screwing a bolt through the disc hole.

[0009] Further, the bottom connecting plate is welded outside the end shell of the electric push rod, and the shell of the electric push rod is located above the vertical support plate;

[0010] By adopting the above technical solution, after the electric push rod is installed above the vertical support plate with the help of the bottom connecting plate, the height of the electric push rod can be higher than that of the thermoforming mold.

[0011] Further, six groups of bottom discharge pipes are arranged and welded below the hollow box;

[0012] By adopting the above technical solution, wind is blown into the thermoforming mold through six groups of bottom discharge pipes below the hollow box.

[0013] Further, the shell size of the fan is larger than the cavity size of the air inlet, and two groups of fans are installed outside the air box;

[0014] By adopting the above technical solution, the shell of the fan can cover the air inlet to supply air into the air box.

[0015] Further, the narrow connecting frame is welded and interconnected at the straight-cut pipe wall of the end pipe body of the air supply pipe;

[0016] By adopting the above technical solution, the air box can communicate with the straight-cut pipe wall of the air supply pipe through the narrow connecting frame, facilitating the air in the air box to enter the air supply pipe.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] By arranging a forming and cooling mechanism at the thermoforming die for thermoforming plastic sheets, the forming and cooling mechanism enables an air-cooling structure with adjustable position to exist during the thermoforming of plastic sheets after heating by the thermoforming die, so that when thermoforming plastic sheets, air is blown to cool the plastic sheet to be formed in the thermoforming die, accelerating the cooling of the concave surface of the plastic sheet to be formed in the thermoforming die, so that the plastic sheet to be formed in the thermoforming die can be quickly formed, greatly improving the thermoforming processing efficiency of plastic sheets. Description of the Drawings

[0019] Figure 1 It is a schematic diagram of the overall structure of a thermoforming mechanism for a plastic sheet of the utility model.

[0020] Figure 2 It is an exploded view of the forming and cooling mechanism of a thermoforming mechanism for a plastic sheet of the utility model.

[0021] Figure 3 It is an exploded view of the air supply structure of a thermoforming mechanism for a plastic sheet of the utility model.

[0022] In the figure: 1. Thermoforming die; 2. Forming and cooling mechanism; 3. L-shaped mounting plate; 4. Vertical support plate; 5. Bottom connecting plate; 6. Electric push rod; 7. Bottom connecting disc; 8. Hollow box; 9. Side empty cylinder; 10. Bottom opening; 11. Bottom discharge pipe; 12. Air supply pipe; 13. Air box; 14. Narrow connecting frame; 15. Air inlet; 16. Fan. Specific Embodiments

[0023] In order to make the technical means, creative features, achieved purposes and effects of the utility model easy to understand, the utility model will be further described below in conjunction with specific embodiments.

[0024] Such as Figures 1-3As shown in the figure, a thermoforming mechanism for plastic sheets includes a thermoforming mold 1 and a forming and cooling mechanism 2. The forming and cooling mechanism 2 includes an L-shaped mounting plate 3, a vertical support plate 4, a bottom connecting plate 5, an electric push rod 6, a bottom connecting disk 7, a hollow box 8, side hollow cylinders 9, an air supply pipe 12 and an air box 13. An L-shaped mounting plate 3 is bolted and locked to the outer shell of the thermoforming mold 1, and another side plate body of the L-shaped mounting plate 3 is vertically welded with a vertical support plate 4 higher than the thermoforming mold 1. The outer surface of the upper end plate body of the vertical support plate 4 is bolted and locked with a bottom connecting plate 5 welded to the outer side of the electric push rod 6, and the telescopic rod head of the electric push rod 6 is bolted and locked with a bottom connecting disk 7 welded to the bottom of the hollow box 8. The two side box openings of the hollow box 8 are interconnected and welded with side hollow cylinders 9, and a bottom opening 10 is opened below the cylinder body of the side hollow cylinder 9. The lower box wall of the hollow box 8 is welded and interconnected with a bottom discharge pipe 11. An air supply pipe 12 is welded and interconnected outside the hollow box 8 above the bottom connecting disk 7, and the end pipe body of the air supply pipe 12 away from the hollow box 8 is welded and interconnected with a narrow connecting frame 14. The outer frame plate of the narrow connecting frame 14 is welded and interconnected with an air box 13. Air inlets 15 are opened on the outer side walls of the two sides of the air box 13 away from the narrow connecting frame 14, and a fan 16 is installed on the surface of the air box 13 outside the air inlets 15.

[0025] Among them, a disk hole is opened in the disk body of the bottom connecting disk 7, and a bolt is screwed between the disk hole of the bottom connecting disk 7 and the telescopic rod head of the electric push rod 6;

[0026] By adopting the above technical solution, the bottom connecting disk 7 can be locked with the telescopic rod head of the electric push rod 6 by screwing a bolt through the disk hole.

[0027] Among them, the bottom connecting plate 5 is welded to the outer shell of the end of the electric push rod 6, and the shell of the electric push rod 6 is located above the vertical support plate 4;

[0028] By adopting the above technical solution, after the electric push rod 6 is installed above the vertical support plate 4 with the help of the bottom connecting plate 5, the height of the electric push rod 6 can be higher than that of the thermoforming mold 1.

[0029] Among them, six groups of bottom discharge pipes 11 are arranged and welded below the hollow box 8;

[0030] By adopting the above technical solution, wind is blown into the thermoforming mold 1 through six groups of bottom discharge pipes 11 below the hollow box 8.

[0031] Among them, the shell size of the fan 16 is larger than the cavity size of the air inlet 15, and two groups of fans 16 are installed outside the air box 13;

[0032] By adopting the above technical solution, the shell of the fan 16 can cover the air inlet 15 to supply air into the air box 13.

[0033] Among them, the narrow connecting frame 14 is welded and interconnected at the straight-cut pipe wall of the end pipe body of the air supply pipe 12;

[0034] By adopting the above technical solution, the air box 13 and the narrow connecting frame 14 can communicate with the straight-cut pipe wall of the air supply pipe 12, facilitating the air in the air box 13 to enter the air supply pipe 12.

[0035] It should be noted that the present utility model is a thermoforming mechanism for plastic sheets. A forming and cooling mechanism 2 is provided at the thermoforming die 1 for thermoforming plastic sheets. After the L-shaped mounting plate 3 of the forming and cooling mechanism 2 is installed at the thermoforming die 1, the fan 16 outside the air box 13 can be electrically connected to an external controller. Then, the thermoforming die 1 can be normally installed at the plastic suction equipment. When the plastic sheet is heated and softened above the thermoforming die 1, the softened plastic sheet falls into the thermoforming die 1. Then, the suction holes in the thermoforming die 1 can suck the plastic sheet into the thermoforming die 1 for fitting. Then, the original cooling pipeline inside the thermoforming die 1 can circulate liquid for cooling the die. After the temperature of the thermoforming die 1 decreases, the side of the plastic sheet close to the thermoforming die 1 is cooled. At this time, the electric push rod 6 can be controlled by the external controller above the vertical support plate 4 to push the bottom connecting plate 7 and the hollow box 8 to above the thermoforming die 1 and the plastic sheet. Then, the fan 16 blows air into the air box 13 at the air inlet 15. The strong wind enters the hollow box 8 and the side empty cylinders 9 on both sides thereof from the air box 13 along the narrow connecting frame 14 and the air supply pipe 12. Then, the air in the hollow box 8 blows from the bottom discharge pipe 11 to the plastic sheet to be formed in the thermoforming die 1. There is a bottom opening 10 below the side empty cylinder 9 to blow air to cool the plastic sheet to be formed in the thermoforming die 1, accelerating the cooling of the concave surface of the plastic sheet to be formed in the thermoforming die 1, so that the plastic sheet to be formed in the thermoforming die 1 can be quickly formed. The blowing time of the plastic sheet to be formed can be recorded under the operation test of the operator for the hardening time of the plastic sheet of different thicknesses by blowing and cooling for on-demand control. When the plastic sheet in the thermoforming die 1 is completed thermoformed, the electric push rod 6 can drive the hollow box 8 and the side empty cylinder 9 away from above the thermoforming die 1, facilitating the removal of the thermoformed plastic product from the thermoforming die 1.

[0036] It should be noted that the present utility model is a thermoforming mechanism for plastic sheets. The components in the present utility model are all components known to those skilled in the art, and their structures and principles can all be known by those skilled in the art through technical manuals or by conventional experimental methods.

[0037] The foregoing has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments, and what is described in the above embodiments and the specification is only to illustrate the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A thermoforming mechanism for plastic sheet materials, comprising a thermoforming die (1), characterized in that: It further includes a forming and cooling mechanism (2). The forming and cooling mechanism (2) includes an L-shaped mounting plate (3), a vertical support plate (4), a bottom connecting plate (5), an electric push rod (6), a bottom connecting disk (7), a hollow box (8), side hollow cylinders (9), an air supply pipe (12) and an air box (13). The L-shaped mounting plate (3) is bolted and locked to the outer shell of the thermoforming die (1), and the other side plate body of the L-shaped mounting plate (3) is vertically welded with a vertical support plate (4) higher than the thermoforming die (1). The outer surface of the upper end plate body of the vertical support plate (4) is bolted and locked with a bottom connecting plate (5) welded to the outside of the electric push rod (6), and the telescopic rod head of the electric push rod (6) is bolted and locked with a bottom connecting disk (7) welded to the bottom of the hollow box (8). The side hollow cylinders (9) are welded and communicated at the two side openings of the hollow box (8), and a bottom opening (10) is opened below the cylinder body of the side hollow cylinder (9). The bottom discharge pipe (11) is welded and communicated with the lower box wall of the hollow box (8). The air supply pipe (12) is welded and communicated with the outside of the hollow box (8) above the bottom connecting disk (7), and the end pipe body of the air supply pipe (12) away from the hollow box (8) is welded and communicated with a narrow connecting frame (14). The air box (13) is welded and communicated with the outside of the frame plate of the narrow connecting frame (14). Air inlets (15) are opened on the outer sides of the two box walls of the air box (13) away from the narrow connecting frame (14), and a fan (16) is installed on the surface of the air box (13) outside the air inlets (15).

2. The thermoforming mechanism of a plastic sheet according to claim 1, wherein: A disk hole is provided in the disk body of the bottom connecting disk (7), and a bolt is screwed between the disk hole of the bottom connecting disk (7) and the telescopic rod head of the electric push rod (6).

3. The thermoforming mechanism of a plastic sheet according to claim 1, characterized in that: The bottom connecting plate (5) is welded to the outside of the end shell of the electric push rod (6), and the shell of the electric push rod (6) is located above the vertical support plate (4).

4. The thermoforming mechanism of a plastic sheet according to claim 1, characterized in that: Six groups of bottom discharge pipes (11) are arranged and welded below the hollow box (8).

5. The thermoforming mechanism of a plastic sheet according to claim 1, characterized in that: The shell size of the fan (16) is larger than the cavity size of the air inlet (15), and two groups of fans (16) are installed outside the air box (13).

6. The thermoforming mechanism of a plastic sheet according to claim 1, characterized in that: The narrow connecting frame (14) is welded and communicated at the straight-cut pipe wall of the end pipe body of the air supply pipe (12).

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