A rapid demolding EPP forming machine

Abstract

The utility model relates to EPP forming machine design technical field, especially a kind of EPP forming machine of quick demoulding. Including bottom plate, top plate installed in the top plate, from top to bottom installation between the top plate and the bottom plate upper die and lower die, ejector assembly installed between the bottom plate and the lower die, and drive assembly installed in the top plate;Wherein, the ejector assembly includes transmission plate installed between the bottom plate and the lower die, and the top rod is evenly installed in the top plate, and in the die closing state, it is inserted into the forming cavity of the lower die, and it is consistent with the bottom wall of the forming cavity;The drive assembly is connected with the upper die and the transmission plate, for driving the upper die and the transmission plate lifting, to make the upper die and the lower die die closing, and make the transmission plate from the forming cavity of the lower die when going up the forming product is ejected.

Description

Technical Field

[0001] This utility model relates to the field of EPP molding machine design technology, and in particular to an EPP molding machine with fast demolding. Background Technology

[0002] EPP (expanded polypropylene) material, due to its lightweight, high strength, impact resistance, environmental friendliness, and recyclability, has been widely used in automotive interiors (such as seat cushioning layers and dashboard support components), electronic packaging (such as cushioning boxes for precision instruments), logistics transportation cushioning components, and children's toys. With the increasing demand for EPP products, EPP molding machines, as core production equipment, have seen their production efficiency, product molding quality, and ease of demolding become key indicators of industry focus.

[0003] Currently available EPP molding machines generally suffer from the following technical defects in the demolding process:

[0004] Low demolding efficiency and poor synchronization: Most traditional EPP molding machines adopt a step-by-step mode of "demolding driven separately after mold opening". That is, the upper mold rises and opens first, and then the product is ejected by an independent cylinder or motor driven by the ejection structure. There is a time difference between the two steps, which leads to a longer production cycle and makes it difficult to meet the needs of large-scale mass production.

[0005] Products are prone to deformation or damage during ejection. Existing ejection structures are mostly "single-point ejection" designs with uneven distribution of ejector pins. EPP products (especially thin-walled or irregularly shaped parts) are subject to unbalanced forces during ejection, which can easily lead to dents, cracks, or edge damage.

[0006] Therefore, it is necessary to propose a technical means to solve the above-mentioned defects. Utility Model Content

[0007] The present invention adopts the following technical solution:

[0008] An EPP molding machine for rapid demolding includes a base plate, a top plate mounted above the base plate, an upper mold and a lower mold mounted from top to bottom between the top plate and the base plate, an ejector assembly mounted between the base plate and the lower mold, and a drive assembly mounted on the top plate. The ejector assembly includes a transmission plate mounted between the base plate and the lower mold, and ejector rods evenly mounted above the transmission plate, extending into the molding cavity of the lower mold in the mold-closed state and abutting against the bottom wall of the molding cavity. The drive assembly is connected to the upper mold and the transmission plate, and is used to drive the upper mold and the transmission plate to rise and fall, so that the upper mold and the lower mold open and close, and so that the transmission plate ejects the molded product from the molding cavity of the lower mold when moving upwards.

[0009] Preferably, the drive assembly includes connecting columns, a transmission screw, a first connecting block, a second connecting block, and a power unit; four connecting columns are provided, located at the four corners between the top plate and the bottom plate, and each connecting column has a vertical mounting groove; the transmission screw is installed in the mounting groove; the first connecting block is installed at the lower part of the transmission screw and connected to the outer side of the lower mold, for driving the transmission plate to rise and fall when the transmission screw rotates; the second connecting block is installed at the upper part of the transmission screw and connected to the outer side of the upper mold, for driving the upper mold to rise and fall when the transmission screw rotates; the power unit is connected to the transmission screw and is used to drive the transmission screw to rotate.

[0010] Preferably, the transmission screw is provided with a first threaded section and a second threaded section from top to bottom, the first threaded section and the second threaded section have the same direction of rotation, and the pitch of the first threaded section is greater than the pitch of the second threaded section.

[0011] Preferably, the power unit includes a transmission wheel mounted above the top plate and connected to each of the transmission screws, a transmission belt connected in sequence to each of the transmission wheels, and a geared motor connected to one of the transmission wheels for driving the transmission wheel to rotate.

[0012] Preferably, the bottom edge of the upper mold is provided with guide posts; the upper edge of the lower mold assembly is provided with guide holes corresponding to the guide posts.

[0013] The EPP molding machine with rapid demolding involved in this utility model has the following significant advantages over the prior art: high demolding efficiency. By linking the upper mold and the ejection component through the drive component, "mold opening and demolding are carried out simultaneously". While the upper mold rises, the transmission plate drives the ejector rod to move upward and eject the product. There is no need to wait in steps, which effectively shortens the single production cycle. At the same time, the ejection is stable. The ejector rods are evenly arranged on the transmission plate, and the force is uniform during the ejection process, avoiding product deformation or damage. Attached Figure Description

[0014] Figure 1 This is an overall schematic diagram of an EPP molding machine for rapid demolding according to the present invention;

[0015] Figure 2 for Figure 1 Top view;

[0016] Figure 3 for Figure 2 A sectional view of BB;

[0017] Figure 4 for Figure 2 A cross-sectional view of CC. Detailed Implementation

[0018] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0019] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] Please see Figures 1 to 4An EPP molding machine for rapid demolding includes a base plate 10, a top plate 20 mounted above the base plate 10, an upper mold 30 and a lower mold 40 mounted from top to bottom between the top plate 20 and the base plate 10, an ejection assembly 50 mounted between the base plate 10 and the lower mold 40, and a drive assembly 60 mounted on the top plate 20; wherein the ejection assembly 50 includes a transmission plate 501 mounted between the base plate 10 and the lower mold 40, and a uniformly installed... An ejector rod 502 is mounted above the transmission plate 501 and extends into the molding cavity of the lower mold 40 in the mold-closed state, fitting against the bottom wall of the molding cavity. The drive assembly 60 is connected to the upper mold 30 and the transmission plate 501, and is used to drive the upper mold 30 and the transmission plate 501 to rise and fall, so that the upper mold 30 and the lower mold 40 open and close, and so that the transmission plate 501 ejects the molded product from the molding cavity of the lower mold 40 when moving upward. In this embodiment, during operation, EPP molding material is injected into the molding cavity of the lower mold 40, and then the drive assembly 60 drives the upper mold 30 and the transmission plate 501 to move downward until they close with the lower mold 40. At this time, the ejector rod 502 retracts to fit against the bottom wall of the molding cavity. After the mold is closed, the drive assembly 60 drives the upper mold 30 to open and close, and simultaneously drives the transmission plate 501 and the ejector rod 502 to move upward to eject the product from the molding cavity. In this embodiment, the driving component 60 and the ejection component 50 are effectively linked to efficiently eject the product during mold opening. At the same time, the uniformly arranged ejector pins 502 ensure stable product ejection, making it suitable for industrial applications.

[0022] In one specific embodiment, the drive assembly 60 includes connecting columns 601, a transmission screw 602, a first connecting block 603, a second connecting block 604, and a power unit. Four connecting columns 601 are provided, located at the four corners between the top plate 20 and the bottom plate 10, and each connecting column 601 has a vertical mounting groove. The transmission screw 602 is installed in the mounting groove. The first connecting block 603 is installed at the lower part of the transmission screw 602 and connected to the outer side of the lower mold 40, used to drive the transmission plate 501 to rise and fall when the transmission screw 602 rotates. The second connecting block 604 is installed at the upper part of the transmission screw 602 and connected to the outer side of the upper mold 30, used to drive the upper mold 30 to rise and fall when the transmission screw 602 rotates. The power unit is connected to the transmission screw 602 and used to drive the transmission screw 602 to rotate. In this embodiment, during operation, the power unit drives each transmission screw 602 to rotate, thereby causing the upper mold 30 and the transmission plate 501 to move up and down as needed, thus completing the mold opening and closing action and the ejection action. Furthermore, the connecting column 601, on the side that abuts the transmission plate 501 and the upper mold 30, is provided with a clearance groove 605 that communicates with the mounting groove and is used for the lifting and lowering of the first connecting block 603 and the second connecting block 604.

[0023] In one specific embodiment, the transmission screw 602 is provided with a first threaded section and a second threaded section from top to bottom. The first threaded section and the second threaded section have the same direction of rotation, and the pitch of the first threaded section is greater than the pitch of the second threaded section. In this embodiment, when the mold opening action is performed, the transmission screw 602 rotates. Since the first threaded section and the second threaded section have the same direction of rotation, they drive the transmission plate 501 and the upper mold 30 to move upward synchronously. At the same time, since the pitch of the first threaded section is greater than the pitch of the second threaded section, the upward movement of the upper mold 30 is greater than the upward movement of the transmission plate 501. This ensures that when the ejector pin 502 completely ejects the product from the molding cavity, there is a sufficient gap between the product and the upper mold 30, making it easy for the operator to remove the product.

[0024] In one specific embodiment, the power unit includes transmission wheels 606 mounted above the top plate 20 and connected to each of the transmission screws 602, transmission belts 607 sequentially connected to each transmission wheel 606, and a geared motor 608 connected to one of the transmission wheels 606 for driving the transmission wheel 606 to rotate. In this embodiment, during operation, the geared motor 608 drives the transmission wheel 606 to rotate, which in turn drives each transmission wheel 606 to rotate via the transmission belt 607, thereby causing each transmission screw 602 to rotate synchronously, thus ensuring the stability of the upper mold 30 and the transmission plate 501 during lifting and lowering. Furthermore, in an optional embodiment, the transmission wheel 606 and the transmission belt 607 can also be sprockets and chains; more specifically, in this embodiment, idler pulleys 609 are provided between each pair of transmission wheels 606 for the transmission belt 607 to wind around, thereby effectively ensuring the stability of the transmission belt 607 during transmission.

[0025] In one specific embodiment, the bottom edge of the upper mold 30 is provided with guide pillars; the upper edge of the lower mold assembly is provided with guide holes corresponding to the guide pillars. In this embodiment, the guide pillars and guide holes effectively ensure the accuracy of mold closing.

[0026] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A rapid demolding EPP molding machine, characterized in that: The device includes a base plate, a top plate mounted above the base plate, an upper mold and a lower mold mounted from top to bottom between the top plate and the base plate, an ejector assembly mounted between the base plate and the lower mold, and a drive assembly mounted on the top plate. The ejector assembly includes a transmission plate mounted between the base plate and the lower mold, and ejector rods evenly mounted above the transmission plate, extending into the forming cavity of the lower mold in the mold-closed state and abutting against the bottom wall of the forming cavity. The drive assembly is connected to the upper mold and the transmission plate, and is used to drive the upper mold and the transmission plate to rise and fall, so that the upper mold and the lower mold open and close, and so that the transmission plate ejects the molded product from the forming cavity of the lower mold when moving upwards.

2. The EPP molding machine for rapid demolding according to claim 1, characterized in that: The drive assembly includes connecting columns, a transmission screw, a first connecting block, a second connecting block, and a power unit. Four connecting columns are located at the four corners between the top plate and the bottom plate, and each connecting column has a vertical mounting groove. The transmission screw is installed in the mounting groove. The first connecting block is installed at the lower part of the transmission screw and connected to the outer side of the lower mold, used to drive the transmission plate to rise and fall when the transmission screw rotates. The second connecting block is installed at the upper part of the transmission screw and connected to the outer side of the upper mold, used to drive the upper mold to rise and fall when the transmission screw rotates. The power unit is connected to the transmission screw and used to drive the transmission screw to rotate.

3. The EPP molding machine for rapid demolding according to claim 2, characterized in that: The transmission screw is provided with a first threaded section and a second threaded section from top to bottom. The first threaded section and the second threaded section have the same direction of rotation, and the pitch of the first threaded section is greater than the pitch of the second threaded section.

4. The EPP molding machine for rapid demolding according to claim 2, characterized in that: The power unit includes a transmission wheel mounted above the top plate and connected to each of the transmission screws, a transmission belt connected in sequence to each of the transmission wheels, and a geared motor connected to one of the transmission wheels for driving the transmission wheel to rotate.

5. The EPP molding machine for rapid demolding according to claim 1, characterized in that: The bottom edge of the upper mold is provided with guide posts; the upper edge of the lower mold is provided with guide holes corresponding to the guide posts.

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