One-step forming hollow plastic pallet production equipment and process

Abstract

The present invention discloses a one-time forming hollow plastic pallet production equipment and process, including two screw extruders, a left guide rail, a right guide rail, a left die, a right die, a left vacuum box, a left vacuum box guide rail, a right support rack, a left support rack, an upper die, and a lower die; the left vacuum box guide rail, the left guide rail, and the right guide rail are respectively located on the left and right sides of the hydraulic press and the left vacuum box guide rail is located above the left guide rail, the left and right support racks are respectively slidably connected to the left and right guide rails, and the left vacuum box is slidably connected to the left vacuum box guide rail. Since the left support rack of the present invention can quickly move the sheet to the bottom of the left vacuum box and push the sheet into the left vacuum box with heat preservation and heating, the left vacuum box can feed the sheet into the lower die, and during the sheet conveying process, the left vacuum box can maintain the temperature of the sheet, so that the quality of the produced product is higher.

Description

Technical Field

[0001] The invention relates to a plastic molding process and equipment, in particular to a one-step molding hollow plastic tray production equipment and process. Background Art

[0002] In the logistics industry, plastic pallets are widely used as material turnover. Figure 1 As shown, it is a conventional one-step forming plastic pallet production equipment, which includes two extruders 1', a left guide rail 2', a right guide rail 3', a frame 4', a frame fixture 5', an upper support frame 6', a lower support frame 7', an upper mold 8', and a lower mold 9'. The frame fixture 5', the upper mold 8' and the lower mold 9' are installed in the frame 4' from top to bottom, and the upper mold 8' and the lower mold 9' are opposite to each other and can be clamped up and down under the drive of the hydraulic press workbench. The left guide rail 2' and the right guide rail 3' are respectively located on both sides of the frame 4', the upper bracket 6' and the lower bracket 7' are respectively slidably connected to the left guide rail 2' and the right guide rail 3' and can slide along the left guide rail 2' and the right guide rail 3' into the upper die 8' and the lower die 9' of the frame 4', the two extruders 1' are respectively located outside the left guide rail 2' and the right guide rail 3' and the mouth dies of the two extruders 1' are respectively facing the upper bracket 6' and the lower bracket 7', so as to spread the plasticized plastic on the upper bracket 6' and the lower bracket 7'. This conventional production equipment is easy to cool the sheet during the production process, and the product quality is poor. Summary of the invention

[0003] One object of the present invention is to provide a one-time forming hollow plastic pallet production device with high automation and high production efficiency.

[0004] Another object of the present invention is to provide a production process for pallets with high product quality.

[0005] To achieve the above purpose, the technical solution of the present invention is:

[0006] The present invention is a one-step forming hollow plastic pallet production equipment, comprising two screw extruders, a left guide rail, a right guide rail, a left die, a right die, a left vacuum box, a left vacuum box guide rail, a right support rack, a left support rack, an upper die, and a lower die;

[0007] The upper mold and the lower mold are installed on the hydraulic press, the upper mold and the lower mold are opposite to each other and can be clamped up and down under the drive of the hydraulic press workbench; the left vacuum box guide rail, the left guide rail and the right guide rail are respectively located on the left and right sides of the hydraulic press, and the left vacuum box guide rail is located above the left guide rail, the outer end of the left guide rail is connected to the left die, the inner end of the left guide rail is connected to the outer end of the left vacuum box guide rail, the inner end of the left vacuum box guide rail is connected to the lower mold, and the two ends of the right guide rail are respectively connected to the right die and the upper mold; the left bracket and the right bracket are respectively slidably connected to the left guide rail and the right On the guide rail, the left bracket can move between the left die and the left vacuum box, and the left die is located above the left bracket, the left vacuum box can move between the left bracket and the lower die, the right bracket can move between the upper die and the right die, and the right die is located above the right bracket, and the left vacuum box is slidably connected to the left vacuum box guide rail; the two screw extruders are respectively located on the outside of the left guide rail and the right guide rail, and the die openings of the left screw extruder and the right screw extruder are respectively facing the left die and the right die, so that the plasticized plastic can be spread on the left bracket and the right bracket.

[0008] The left vacuum box comprises a left vacuum base, a left vacuum frame, a vacuum box body, a heating plate, a vacuum air hole, a Teflon insulation plate, a left vacuum motor, a left vacuum screw and a left vacuum frame; the left vacuum box guide rail is installed on the left vacuum frame, the left vacuum base is slidably connected to the left vacuum box guide rail, the left vacuum frame is fixedly installed on the left vacuum base, the left vacuum motor is installed on the left vacuum frame and is connected to the left vacuum base through the left vacuum screw to drive the left vacuum base to move back and forth; the vacuum box body is a rectangular body with one end open, and its bottom surface is an arc surface, the vacuum air hole is opened on the bottom surface and is connected with the inner cavity of the vacuum box, the vacuum box body is fixed on the left vacuum frame with the open mouth facing downward, a heating plate is installed on the inner wall of the vacuum box, a Teflon insulation plate is attached to the inner wall of the vacuum box, and a plurality of vacuum holes are arranged around the left vacuum frame for adsorbing sheets and can be backblown for removing materials.

[0009] The left supporting rack includes a left supporting base, a left supporting frame, a left supporting bottom plate, four lifting cylinders, a left supporting motor, a left screw and a left frame; the left guide rail is installed on the left frame, the left supporting base is slidably connected to the left guide rail, the cylinder bodies of the four lifting cylinders are respectively fixedly installed on the left supporting base, the piston rod ends of the four lifting cylinders are respectively connected to the left supporting frame, and are used to lift the sheet upward and send it into the left vacuum box, the left supporting motor is installed on the left frame and connected to the left supporting base through the left screw, driving the left supporting base to move back and forth, and the left supporting bottom plate is installed on the bottom side of the left supporting frame.

[0010] The right supporting rack includes a right supporting base, a right supporting frame, a right supporting bottom plate, a right supporting motor, a right screw rod, and a right frame; the right guide rail is installed on the right frame, the right supporting base is slidably connected to the right guide rail and is connected to the right supporting frame, the right supporting motor is installed on the right frame and is connected to the right supporting base through the right screw rod, driving the right supporting base to move back and forth, and the right supporting bottom plate is located at the bottom of the right supporting frame.

[0011] The present invention discloses a production process for a pallet, comprising the following steps: (1) plastic raw materials are heated to 180-220° by heating rings on two screw extruders respectively, and two sheets are extruded from a left die and a right die; (2) after the left and right sheets reach a set length, they are automatically sheared and evenly fall into a right support rack and a left support rack; (3) the left support rack quickly moves the sheet to the bottom of a left vacuum box and pushes the sheet into a left vacuum box with heat preservation and heating, the left vacuum box and the frame immediately start vacuuming to firmly hold the sheet, and the left support rack exits the vacuum box and retreats to the original position to prepare for the next sheet; (4) the left vacuum box quickly carries the sheet to the top of the lower die of the mold, after reaching the position, the lower die is lifted up by the oil cylinder and tightly closed with the left vacuum box frame, and the left vacuum box and the frame close the vacuum to reverse At the same time, the lower mold is blown and the vacuum is turned on to firmly adsorb the sheet to the lower mold. After that, the lower mold is retracted by the oil cylinder and the left vacuum box exits the mold; (5) The right support rack quickly sends the sheet to the bottom of the upper mold of the mold. The upper mold quickly descends and aligns with the frame of the support rack to close tightly. The upper mold turns on the vacuum to suck the sheet on the rack into the upper mold and firmly adsorb it and form nine foot piers. The upper mold ascends and the right support rack returns to its original position to prepare for the next piece of material; (6) The hydraulic platform closes the upper and lower molds to generate high pressure to press the two high-temperature sheets together; (7) High-pressure gas is injected into the mold cavity to make the two sheets close to the mold respectively, and the mold cooling system is turned on to cool the sheets; (8) After cooling and forming, the high-pressure gas is discharged, the upper and lower molds are opened, the ejection cylinder ejects the product, and the surrounding materials of the product are cut off to complete the entire product production.

[0012] After adopting the above scheme, since the present invention adopts two screw extruders, a left guide rail, a right guide rail, a left die, a right die, a frame, a left vacuum box, a left vacuum box guide rail, a right support rack, a left support rack, an upper die and a lower die, the left support rack, the left vacuum box and the right support rack are respectively installed on the corresponding linear guide rails, the left support rack can enter directly below the left vacuum box along the linear guide rail, and the left vacuum box and the right support rack can enter between the upper and lower molds of the frame along the linear guide rail, and the degree of automation is high; the left support rack can quickly move the sheet to the bottom of the left vacuum box and push the sheet into the left vacuum box with heat preservation and heating, the left vacuum box can feed the sheet into the lower die, and during the sheet transportation process, the left vacuum box can maintain the temperature of the sheet, so that the quality of the produced product is higher.

[0013] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the main view of the one-step forming plastic pallet production equipment used;

[0015] Figure 2 is an axonometric view of the present invention;

[0016] Figure 3 is a front view of the present invention;

[0017] Figure 4 is a top view of the present invention;

[0018] Figure 5 It is an installation axonometric drawing of the left bracket of the present invention;

[0019] Figure 6 It is a bottom-up axonometric view of the left bracket of the present invention;

[0020] Figure 7 It is an axonometric view of the right bracket of the present invention;

[0021] Figure 8 It is an installation axonometric diagram of the left vacuum box of the present invention;

[0022] Fig. 9 is a top view of the left vacuum box of the present invention;

[0023] Fig.10 is a front view of the left vacuum box of the present invention;

[0024] Fig.11 is a top axonometric view of the left vacuum box of the present invention;

[0025] Fig.12 It is an axonometric view of the left vacuum box of the present invention from above. DETAILED DESCRIPTION

[0026] like Figure 2-Figure 4 As shown, the present invention is a one-time forming hollow plastic pallet production equipment, including two screw extruders 1, a left guide rail 2, a right guide rail 3, a left die 4, a right die 5, a left vacuum box 6, a left vacuum box guide rail 7, a left support rack 8, a right support rack 9, an upper mold 10, and a lower mold 20.

[0027] The upper die 10 and the lower die 20 are installed on the hydraulic press 30. The upper die 10 and the lower die 20 are opposite to each other and can be clamped up and down under the drive of the workbench of the hydraulic press 30; the left vacuum box guide rail 7, the left guide rail 2 and the right guide rail 3 are respectively located on the left and right sides of the hydraulic press 30, and the left vacuum box guide rail 7 is located above the left guide rail 2. The outer end of the left guide rail 2 is connected to the left die 4, the inner end of the left guide rail 2 is connected to the outer end of the left vacuum box guide rail 7, the inner end of the left vacuum box guide rail 7 is connected to the lower die 20, and the two ends of the right guide rail 3 are respectively connected to the right die 5 and the upper die 10; the left bracket 8 and the right bracket 9 are respectively slidably connected to the left guide rail 2 and the right guide rail 3, the left bracket 8 can move between the left die 4 and the left vacuum box 6 and the left die 4 is located above the left bracket 8, the left vacuum box 6 can move between the left bracket 8 and the lower die 20, the right bracket 9 can move between the upper die 10 and the right die 5 and the right die 5 is located above the right bracket 9, and the left vacuum box 6 is slidably connected to the left vacuum box guide rail 7; the two screw extruders 1 are respectively located on the outside of the left guide rail 2 and the right guide rail 3, the die opening of the left screw extruder 1 and the die opening of the right screw extruder 1 are respectively facing the left die 4 and the right die 5, so that the plasticized plastic can be spread on the left bracket 8 and the right bracket 9.

[0028] like Figure 8-Figure 12 As shown, the left vacuum box 6 includes a left vacuum base 61, a left vacuum frame 62, a vacuum box body 63, vacuum air holes (backblowing holes) 64, a heating plate (not shown in the figure), a Teflon insulation plate (not shown in the figure), a left vacuum motor 65, a left vacuum screw 66, and a left vacuum frame 67. The left vacuum box guide rail 7 is installed on the left vacuum frame 67, the left vacuum base 61 is slidably connected to the left vacuum box guide rail 7, the left vacuum frame 62 is fixedly installed on the left vacuum base 61, the left vacuum motor 65 is installed on the left vacuum frame 67 and connected to the left vacuum base 61 through the left vacuum screw 66, driving the left vacuum base 61 to move back and forth; the vacuum box body 63 is a rectangular body with one end open, and its bottom surface 631 is an arc surface. The vacuum air hole 64 is opened on the bottom surface 631 and is connected to the inner cavity of the vacuum box body 63. The vacuum box body 63 is fixed on the left vacuum frame 62 with the open mouth facing downward. A heating plate is installed on the inner wall of the vacuum box body 63, and a Teflon insulation sheet is attached to the inner wall of the vacuum box body 63. A plurality of vacuum holes are arranged around the left vacuum frame 62 for adsorbing sheets and can be backblown to facilitate material removal.

[0029] like Figure 5 , Figure 6As shown, the left support frame 8 includes a left support base 81, a left support frame 82, a left support bottom plate 83, four upper cylinders 84, a left support motor 85, a left screw 86, and a left frame 87. The left guide rail 2 is mounted on the left frame 87, the left support base 81 is slidably connected to the left guide rail 2, the cylinder bodies of the four upper cylinders 84 are respectively fixedly mounted on the left support base 81, and the piston rod ends of the four upper cylinders are respectively connected to the left support frame 82, which are used to lift the sheet upward and send it into the left vacuum box 6. The left support motor 85 is mounted on the left frame 87 and connected to the left support base 81 through the left screw 86, driving the left support base 81 to move back and forth, and the left support bottom plate 83 is mounted on the bottom side of the left support frame 82.

[0030] like Figure 7 As shown, the right support frame 9 includes a right support base 91, a right support frame 92, a right support bottom plate 93, a right support motor 94, a right screw rod 95, and a right frame 96. The right guide rail 3 is installed on the right frame 96, the right support base 91 is slidably connected to the right guide rail 3 and connected to the right support frame 92, the right support motor 94 is installed on the right frame 96 and connected to the right support base 91 through the right screw rod 95, driving the right support base 91 to move back and forth, and the right support bottom plate 93 is located at the bottom of the right support frame 92.

[0031] like Figure 1-Figure 3As shown, the present invention is a production process for a pallet, comprising the following steps: (1) the plastic raw material is heated to 180-220° by the heating rings on two screw extruders 1, and two sheets are extruded from the left die 4 and the right die 5; (2) after the left and right sheets reach the set length, they are automatically sheared and evenly fall into the right support rack 9 and the left support rack 8; (3) the left support rack 8 quickly moves the sheet to the bottom of the left vacuum box 6 and pushes the sheet into the left vacuum box 6 with heat preservation and heating, the left vacuum box 6 and the frame immediately start the vacuum to firmly suck the sheet, and the left support rack 8 exits the vacuum box and retreats to the original position to prepare for the next sheet; (4) the left vacuum box 6 carries the sheet quickly to the top of the lower die 20 of the mold, and after reaching the position, the lower die 20 is lifted up by the oil cylinder and tightly closed with the frame of the left vacuum box 6, and the left vacuum box 6 and the frame close the vacuum for backblowing At the same time, the lower mold 20 starts the vacuum to firmly adsorb the sheet to the lower mold 20, and then the lower mold 20 is retracted by the cylinder and the left vacuum box 6 exits the mold; (5) The right support rack 9 quickly feeds the sheet to the bottom of the upper mold 10 of the mold, and the upper mold 10 quickly descends to align with the frame of the support rack and closes tightly, and the upper mold 10 starts the vacuum to suck the sheet on the rack into the upper mold 10 and firmly adsorb it and form nine foot piers, and the upper mold 10 ascends and the right support rack 9 returns to its original position to prepare for the next piece of material; (6) The hydraulic platform closes the upper and lower molds of the mold to generate high pressure to press and bond the two high-temperature sheets together; (7) High-pressure gas is injected into the mold cavity to make the two sheets close to the mold respectively, and the mold cooling system is turned on to cool the sheets; (8) After cooling and forming, the high-pressure gas is discharged, the upper mold 10 and the lower mold 20 are opened, and the ejector cylinder ejects the product, and the surrounding materials of the product are cut off to complete the entire product production.

[0032] The key point of the present invention is that a left vacuum box for heat preservation is provided.

[0033] The above description is only a preferred embodiment of the present invention, and therefore cannot be used to limit the scope of implementation of the present invention. That is, equivalent changes and modifications made according to the scope of the patent application of the present invention and the contents of the specification should still fall within the scope covered by the patent of the present invention.

Claims

1. A one-step forming hollow plastic pallet production equipment, characterized by: It includes two screw extruders, a left guide rail, a right guide rail, a left die, a right die, a left vacuum box, a left vacuum box guide rail, a right support rack, a left support rack, an upper die, and a lower die; The upper mold and the lower mold are installed on the hydraulic press, the upper mold and the lower mold are opposite to each other and can be clamped up and down under the drive of the hydraulic press workbench; the left vacuum box guide rail, the left guide rail and the right guide rail are respectively located on the left and right sides of the hydraulic press, and the left vacuum box guide rail is located above the left guide rail, the outer end of the left guide rail is connected to the left die, the inner end of the left guide rail is connected to the outer end of the left vacuum box guide rail, the inner end of the left vacuum box guide rail is connected to the lower mold, and the two ends of the right guide rail are respectively connected to the right die and the upper mold; the left The support frame and the right support frame are slidably connected to the left guide rail and the right guide rail respectively. The left support frame can move between the left die and the left vacuum box, and the left die is located above the left support frame. The left vacuum box can move between the left support frame and the lower die. The right support frame can move between the upper die and the right die, and the right die is located above the right support frame. The left vacuum box is slidably connected to the left vacuum box guide rail. The two screw extruders are respectively located on the outer sides of the left guide rail and the right guide rail. The die of the left screw extruder and the die of the right screw extruder are The left and right openings are respectively facing the left and right openings of the die, so that the plasticized plastic can be spread on the left and right supporting racks; the left vacuum box comprises a left vacuum base, a left vacuum frame, a vacuum box body, a heating plate, a vacuum air hole, a Teflon insulation sheet, a left vacuum motor, a left vacuum screw, and a left vacuum rack; the left vacuum box guide rail is installed on the left vacuum rack, the left vacuum base is slidably connected to the left vacuum box guide rail, the left vacuum frame is fixedly installed on the left vacuum base, the left vacuum motor is installed on the left vacuum rack and connected to the left vacuum base through the left vacuum screw, driving the left vacuum base to move back and forth; the vacuum box body is a rectangular body with one end open, and its bottom surface is an arc surface, the vacuum air hole is opened on the bottom surface and communicated with the inner cavity of the vacuum box, the vacuum box body is fixed on the left vacuum frame and the open mouth faces downward, a heating plate is installed on the inner wall of the vacuum box, and the Teflon insulation sheet is attached to the inner wall of the vacuum box, and a plurality of vacuum holes are arranged around the left vacuum frame for adsorbing the sheet and backblowing for removing the material.

2. The one-step forming hollow plastic pallet production equipment according to claim 1 is characterized in that: The left supporting rack includes a left supporting base, a left supporting frame, a left supporting bottom plate, four lifting cylinders, a left supporting motor, a left screw, and a left frame; the left guide rail is installed on the left frame, the left supporting base is slidably connected to the left guide rail, the cylinder bodies of the four lifting cylinders are respectively fixedly installed on the left supporting base, and the piston rod ends of the four lifting cylinders are respectively connected to the left supporting frame to lift the sheet upward and send it into the left vacuum box. The left supporting motor is installed on the left frame and connected to the left supporting base through the left screw to drive the left supporting base to move back and forth, and the left supporting bottom plate is installed on the bottom side of the left supporting frame.

3. The one-step forming hollow plastic pallet production equipment according to claim 1 is characterized in that: The right supporting rack includes a right supporting base, a right supporting frame, a right supporting bottom plate, a right supporting motor, a right screw rod, and a right frame; the right guide rail is installed on the right frame, the right supporting base is slidably connected to the right guide rail and is connected to the right supporting frame, the right supporting motor is installed on the right frame and is connected to the right supporting base through the right screw rod, driving the right supporting base to move back and forth, and the right supporting bottom plate is located at the bottom of the right supporting frame.

4. A production process for a pallet according to claim 1, characterized in that: The following steps are involved: (1) The plastic raw materials are heated to 180-220° by the heating rings on two screw extruders and two sheets are extruded from the left and right dies; (2) After the left and right sheets reach the set length, they are automatically cut and fall evenly and flatly into the right and left support racks; (3) The left support rack quickly moves the sheet to the bottom of the left vacuum box and pushes the sheet into the left vacuum box with heat preservation and heating. The left vacuum box immediately turns on the vacuum to firmly suck the sheet, and the left support rack withdraws from the vacuum box and retreats to its original position to prepare for the next sheet; (4) The left vacuum box carries the sheet quickly to the top of the lower mold of the mold. After reaching the position, the lower mold is lifted up by the cylinder and tightly closed with the left vacuum box frame. The left vacuum box and the frame turn off the vacuum for backblowing. At the same time, the lower mold turns on the vacuum to firmly adsorb the sheet to the lower mold. After that, the lower mold is retreated by the cylinder and the left vacuum box withdraws from the mold. ; (5) The right support rack quickly delivers the sheet to the bottom of the upper mold of the mold. The upper mold quickly moves down and aligns with the frame of the support rack and closes tightly. The upper mold opens the vacuum to suck the sheet on the rack into the upper mold, firmly suck it and form nine foot piers. The upper mold moves up and the right support rack returns to its original position to prepare for the next sheet of material; (6) The hydraulic platform closes the upper and lower molds of the mold to generate high pressure to press the two high-temperature sheets together; (7) High-pressure gas is injected into the mold cavity to make the two sheets close to the mold respectively, and the mold cooling system is turned on to cool the sheets; (8) After cooling and forming, the high-pressure gas is discharged, the upper and lower molds are opened, the ejection cylinder ejects the product, and the surrounding materials of the product are cut off to complete the entire product production.

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