Food tray hemming forming die

Abstract

The utility model relates to a food tray curled edge forming die, which comprises an upper movable die and a lower fixed die, the top of the lower fixed die is provided with a forming protrusion used for placing a tray in an inverted buckling mode, the forming protrusion is a hollow rectangular frame with four chamfered corners, and the food tray curled edge forming die relates to the technical field of tray forming. According to the food tray hemming forming die, during downward pressing, a reset spring is downwards extruded to contract, a connecting frame drives an ejector rod to move downwards, a tray is completely inversely buckled above a forming protrusion, then hot-pressing hemming forming is conducted on the side edge, after hot pressing is completed, an upper movable die is lifted, and the reset spring pushes the connecting frame to rise, so that the food tray is formed. And then the bearing rod and the ejector rod are driven to rise, the tray is jacked up through the ejector rod for resetting, mold stripping is completed, the tray in the lower fixed mold is jacked out by a certain height, an operator can take out the tray conveniently, proper buffering is conducted when the tray is jacked up by abutting against the bottom of the tray through the arrangement of the elastic section, and damage caused by direct stress is prevented.

Description

Technical Field

[0001] This utility model relates to the field of tray forming technology, specifically a food tray edge rolling forming mold. Background Technology

[0002] During the forming process, the aluminum foil sheet is formed into a set shape in one step by pressing the upper and lower molds together. Then, the formed product is removed, another unformed aluminum foil sheet is placed on it, and the above operation is repeated.

[0003] During use, existing rolled pallet one-piece molding molds often result in the formed pallets getting stuck in the lower mold or on the upper mold. For pallets on the upper mold, simply removing them completes the material removal process. However, for pallets stuck in the lower mold, operators can only use specific tools to remove the pallets from the lower mold, which is inconvenient for operators to quickly remove the pallets and affects the production efficiency of pallets. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a food tray edge-rolling forming mold, which solves the aforementioned problems.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a food tray edge-rolling forming mold, comprising an upper moving mold and a lower fixed mold, wherein the top of the lower fixed mold is provided with a forming protrusion for placing the tray upside down, the forming protrusion being a hollow rectangular frame with chamfered corners on all four sides; the bottom of the inner cavity of the upper moving mold is provided with a forming groove for hot-pressing edge-rolling the tray, the forming groove being circumferentially arranged around the forming protrusion; and the inner cavity of the lower fixed mold is provided with an ejection mechanism for ejecting the tray.

[0006] The ejection mechanism includes a connecting frame disposed within the inner cavity of the lower fixed mold. A receiving rod is fixedly connected to the top of the connecting frame. The top end of the receiving rod penetrates the inner cavity of the lower fixed mold and extends above it. The inner cavity of the lower fixed mold has a sliding groove that slidably connects with the surface of the receiving rod. An ejection rod located within the inner cavity of the forming protrusion is fixedly connected to the top of the receiving rod. A return spring is fixedly connected to the bottom of the receiving rod and is fixedly connected to the bottom of the inner cavity of the lower fixed mold. In use, the tray is inverted and placed on the forming protrusion above the lower fixed mold. At this time, the ejection rod lifts the tray, and then the upper moving mold... The drive mechanism presses down, pressing the tray through the forming groove. During the pressing, the upper moving mold contacts the receiving rod first, squeezing the receiving rod and causing the connecting frame to move downward. The downward pressure causes the return spring to contract, and the connecting frame causes the ejector rod to move downward, so that the tray is completely inverted on top of the forming protrusion. Then, the sides are hot-pressed and rolled. After the hot pressing is completed, the upper moving mold rises, the return spring pushes the connecting frame to rise, and then drives the receiving rod and ejector rod to rise. The ejector rod lifts the tray to reset, completing the demolding. The tray in the lower fixed mold is ejected to a certain height, making it easy for the operator to remove the tray.

[0007] As a further embodiment of this utility model: the inner cavity of the lower mold is fixedly connected to a receiving block located below the receiving rod. The receiving block prevents the receiving rod from moving downwards excessively, causing irreversible compression damage to the return spring, and increases the service life of the return spring.

[0008] As a further embodiment of this utility model: positioning grooves are provided at the four corners of the upper moving mold, and positioning protrusions that are adapted to the positioning grooves are provided at the four corners of the lower fixed mold. By setting the positioning protrusions and positioning grooves, effective positioning can be achieved to prevent misalignment from causing deformation under heat pressure.

[0009] As a further embodiment of this utility model: four of each of the receiving rods and ejector rods are provided and are arranged in a ring within the lower mold, resulting in multi-point contact and more stable force distribution.

[0010] As a further embodiment of this utility model: the top of the ejector rod is provided with an elastic section. When the elastic section abuts against the bottom of the tray and lifts it up, it provides appropriate cushioning to prevent damage caused by direct force.

[0011] Compared with the prior art, the present invention has the following advantages:

[0012] 1. In this utility model, during the downward pressing, the lower part of the upper moving mold contacts the receiving rod first, and the pressing of the receiving rod drives the connecting frame to move downward. The downward pressing resetting spring contracts, and the connecting frame drives the ejector rod to move downward, so that the tray is completely inverted on top of the forming protrusion. Then, the side is hot-pressed and rolled. After the hot pressing is completed, the upper moving mold rises, the resetting spring pushes the connecting frame to rise, and then drives the receiving rod and ejector rod to rise. The ejector rod lifts the tray to reset, completing the demolding. The tray in the lower fixed mold is pushed out to a certain height, making it convenient for the operator to remove the tray. The elastic section is set to abut against the bottom of the tray to provide appropriate cushioning when lifting it, preventing damage caused by direct force.

[0013] 2. This utility model, through the setting of positioning protrusions and positioning grooves, can effectively position and prevent misalignment from causing deformation under heat pressure. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a front view of the structure of this utility model;

[0016] Figure 3 This is a cross-sectional view of the structure of this utility model;

[0017] Figure 4 This is a three-dimensional schematic diagram of the upper moving mold of this utility model from another angle.

[0018] In the diagram: 1. Upper moving mold; 2. Lower fixed mold; 3. Forming protrusion; 4. Supporting rod; 5. Sliding groove; 6. Return spring; 7. Connecting frame; 8. Ejector rod; 9. Elastic section; 10. Supporting block; 11. Positioning protrusion; 12. Positioning groove; 13. Forming groove. Detailed Implementation

[0019] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0020] Please see Figure 1-4 This utility model provides a technical solution: a food tray edge-rolling forming mold, including an upper moving mold 1 and a lower fixed mold 2. The top of the lower fixed mold 2 is provided with a forming protrusion 3 for placing the tray upside down. The forming protrusion 3 is a hollow rectangular frame with chamfered corners. The bottom of the inner cavity of the upper moving mold 1 is provided with a forming groove 13 for hot-pressing the tray edge-rolling. The forming groove 13 is arranged circumferentially around the forming protrusion 3. The inner cavity of the lower fixed mold 2 is provided with an ejection mechanism for ejecting the tray.

[0021] The ejection mechanism includes a connecting frame 7 disposed in the inner cavity of the lower fixed mold 2. A receiving rod 4 is fixedly connected to the top of the connecting frame 7. The top end of the receiving rod 4 penetrates the inner cavity of the lower fixed mold 2 and extends above the lower fixed mold 2. The inner cavity of the lower fixed mold 2 has a sliding groove 5 that slides in contact with the surface of the receiving rod 4. An ejection rod 8 located in the inner cavity of the forming protrusion 3 is fixedly connected to the top of the receiving rod 4. A return spring 6 is fixedly connected to the bottom of the receiving rod 4. The return spring 6 is fixedly connected to the bottom of the inner cavity of the lower fixed mold 2. In use, the tray is inverted and placed on the forming protrusion 3 above the lower fixed mold 2. At this time, the ejection rod 8 lifts the tray, and then the upper moving mold 1 is driven by the mechanism. The drive presses down, pressing the tray through the forming groove 13. During the pressing, the upper moving mold 1 contacts the receiving rod 4 first, squeezing the receiving rod 4 and causing the connecting frame 7 to move downward. The downward squeezing resetting spring 6 retracts, and the connecting frame 7 drives the ejector rod 8 to move downward, so that the tray is completely inverted above the forming protrusion 3. Then, the side is hot-pressed and rolled. After the hot pressing is completed, the upper moving mold 1 rises, the resetting spring 6 pushes the connecting frame 7 to rise, and then drives the receiving rod 4 and the ejector rod 8 to rise. The ejector rod 8 lifts the tray to reset, completing the demolding. The tray in the lower fixed mold 2 is ejected to a certain height, making it convenient for the operator to remove the tray.

[0022] The inner cavity of the lower mold 2 is fixedly connected to a receiving block 10 located below the receiving rod 4. The receiving block 10 prevents the receiving rod 4 from moving downwards excessively, which could cause irreversible compression damage to the return spring 6 and increase the service life of the return spring 6.

[0023] The upper moving mold 1 has positioning grooves 12 at each of its four corners, and the lower fixed mold 2 has positioning protrusions 11 at each of its four corners that are adapted to the positioning grooves 12. By setting the positioning protrusions 11 and positioning grooves 12, effective positioning can be achieved to prevent misalignment from causing hot-press deformation.

[0024] There are four of each of the receiving rods 4 and ejector rods 8, which are arranged in a ring within the lower mold 2, resulting in multi-point contact and more stable force distribution.

[0025] The top of the ejector rod 8 is provided with an elastic section 9. The elastic section 9 provides appropriate cushioning when it abuts against the bottom of the tray and lifts it up, preventing damage caused by direct force.

[0026] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A food tray edge-forming mold, comprising an upper moving mold (1) and a lower fixed mold (2), characterized in that: The lower fixed mold (2) has a forming protrusion (3) on its top for placing the tray upside down. The forming protrusion (3) is a hollow rectangular frame with chamfered corners. The upper moving mold (1) has a forming groove (13) at the bottom of its inner cavity for hot pressing the tray. The forming groove (13) is arranged circumferentially around the forming protrusion (3). The lower fixed mold (2) has an ejection mechanism for ejecting the tray. The ejection mechanism includes a connecting frame (7) disposed in the inner cavity of the lower fixed mold (2). A receiving rod (4) is fixedly connected to the top of the connecting frame (7). The top end of the receiving rod (4) penetrates the inner cavity of the lower fixed mold (2) and extends to the top of the lower fixed mold (2). The inner cavity of the lower fixed mold (2) is provided with a sliding groove (5) that is slidably connected to the surface of the receiving rod (4). An ejection rod (8) located in the inner cavity of the forming protrusion (3) is fixedly connected to the top of the receiving rod (4). A return spring (6) is fixedly connected to the bottom of the receiving rod (4). The return spring (6) is fixedly connected to the bottom of the inner cavity of the lower fixed mold (2).

2. The food tray edge-rolling forming mold according to claim 1, characterized in that: The inner cavity of the lower mold (2) is fixedly connected to a receiving block (10) located below the receiving rod (4).

3. The food tray edge-rolling forming mold according to claim 1, characterized in that: The upper moving mold (1) has positioning grooves (12) at each of its four corners, and the lower fixed mold (2) has positioning protrusions (11) at each of its four corners that are adapted to the positioning grooves (12).

4. The food tray edge-rolling forming mold according to claim 1, characterized in that: The receiving rod (4) and the ejector rod (8) are each provided in fours, and are arranged in a ring within the lower mold (2).

5. The food tray edge-rolling forming mold according to claim 1, characterized in that: The top of the ejector rod (8) is provided with an elastic section (9).

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