Foamed material pocket structure and mold

Abstract

The utility model relates to foaming mould technical field especially for a kind of foaming material material-holding structure and mould, for foaming material becomes foaming product in mould pressing, the material-holding structure includes upper die and lower die;The die closing protrusion is opened with upper die cavity;Lower die is opened with lower die cavity on the side close to upper die, and there is material-holding structure on lower die cavity, and the required material of upper die cavity is stacked using material-holding structure outside the required material of lower die cavity is full, when closing mould, the material of lower material-holding structure is extruded and full after using die closing protrusion upper die cavity.The utility model, since the space of material-holding area is close to the space of upper die cavity, upper die cavity is concave as a whole, material-holding area can cooperate with upper die cavity, and the material used is pressed tightly and fills entire mould cavity when closing mould.The main problem that mould closing cannot fill material of upper die cavity is solved when pressureless blanking equipment is produced;Production efficiency is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of foaming mold technology, specifically to a foaming material holding structure and mold. Background Technology

[0002] Materials such as E-TPU (Expanded Thermoplastic Polyurethane) and PU (polyurethane) can be used to manufacture midsoles and insoles for athletic shoes, pet toys, and other products.

[0003] In the production of foamed products using E-TPU and PU, the limitations of the equipment's feeding method restrict the product shape to the lower mold cavity. The upper mold has virtually no cavity depth and is only used to press the lower mold together to close the mold. Consequently, all product shapes are limited to flat sheets, meaning the parting line (also known as the mold-closing line) must be at the highest point of the product. This results in a relatively low parting surface. Since the foam material expands rapidly, it easily overflows the lowest parting surface (which is also the highest point of the product) before the mold is fully closed, leading to excessive waste of foam material. Utility Model Content

[0004] The purpose of this utility model is to provide a foam material holding structure and mold to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A foam material holding structure is used to press / manufacture foam material into foam products in a mold. The holding structure includes an upper mold and a lower mold.

[0007] The upper mold is used to close or open with the lower mold, and the side of the upper mold near the lower mold has a mold-closing protrusion, which has an upper mold cavity.

[0008] The lower mold has a lower mold cavity on the side closest to the upper mold, and the lower mold cavity has a material catchment structure.

[0009] Furthermore, in addition to filling the lower mold cavity with the required material, the upper mold cavity is filled with the required material using a material-collecting structure. When the mold is closed, the material collected by the lower material-collecting structure is squeezed and filled into the upper mold cavity using the mold-closing protrusion.

[0010] Furthermore, the material-collecting structure includes a material-collecting area, the top of the lower mold cavity has a parting line, and the bottom of the material-collecting area is integrally connected to the parting line.

[0011] Furthermore, the top of the material-collecting area is lower than the upper surface of the lower mold, or the top of the material-collecting area is flush with the upper surface of the lower mold, or the top of the material-collecting area is higher than the upper surface of the lower mold.

[0012] The parting line is positioned below the upper surface of the lower mold, or the parting line is flush with the upper surface of the lower mold, or the parting line is positioned above the upper surface of the lower mold.

[0013] Furthermore, grooves are provided on the relatively close end faces of the upper and lower molds, and an outlet area for waste discharge is formed between the two grooves.

[0014] Furthermore, the upper mold / lower mold has a positioning protrusion, and the lower mold / upper mold has a positioning hole that engages with the positioning protrusion.

[0015] Furthermore, the upper and lower molds are closed and opened by rotation or by upper and lower cover closing.

[0016] Furthermore, the foaming material is E-TPU or PU.

[0017] Furthermore, the upper and lower molds are square, circular, or quadrilateral in shape;

[0018] The mold closing protrusion, upper mold cavity, lower mold cavity, and material collection area are square, circular, or quadrilateral in shape.

[0019] To achieve the above objectives, this utility model also provides the following technical solution:

[0020] A mold comprising the aforementioned foam material holding structure.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] This utility model addresses the shortcomings of traditional molds, such as the inability to fully fill the upper mold cavity with foamed material, poor venting, and insufficient filling due to the foamed material piling up above the parting line, in order to realize the production of foamed materials with shapes such as spheres and complex curved surfaces.

[0023] In this invention, the required material is first piled up in the lower mold cavity. After the upper and lower molds are closed, the material can be squeezed and piled up in the upper mold cavity due to the existence of the material collection area. In this way, a large part of the material can be used to form foamed products, while the material squeezed out of the material collection area is discharged as waste material from the outlet area. This can also reduce the waste caused by the material falling / injected just enough or slightly too much being squeezed out of the mold from the parting line.

[0024] In this invention, since the space of the material-collecting area is close to the space of the upper mold cavity, and the upper mold cavity is recessed inward, the material-collecting area can cooperate with the upper mold cavity to compress the material used and fill the entire mold cavity when the mold is closed.

[0025] This invention mainly solves the problem that the upper mold cavity cannot be filled with material when the mold is closed during the production of pressureless material feeding equipment (such as foamed materials like E-TPU and PU); thus greatly improving production efficiency.

[0026] This utility model, because the mold includes an upper mold and a lower mold, is a two-plate mold, so it is simple and efficient to operate, and the material-collecting area also saves the manual scraping process. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the mold opening structure of this utility model.

[0028] Figure 2 This is a schematic diagram of the mold-closing structure of this utility model.

[0029] Figure 3 This is a schematic diagram of the mold opening process after the foamed product of this utility model is formed.

[0030] Figure 4 This utility model Figure 2 Cross-sectional view of section AA (hiding a foamed product).

[0031] Figure 5 This is a schematic diagram of the foamed product of this utility model, which is in the shape of a sphere.

[0032] In the diagram: 1-Mold, 2-Upper mold, 3-Lower mold, 4-Lower mold cavity, 5-Material collection area, 6-Parting line, 7-Mold closing protrusion, 8-Upper mold cavity, 9-Positioning protrusion, 10-Positioning hole, 11-Groove, 12-Exit area, 13-Foamed product. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] In the description of this utility model, it should be noted that the terms "upper end," "lower end," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within 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.

[0036] Please see Figures 1 to 5 This utility model provides a technical solution:

[0037] A foam material holding structure is used to press / manufacture foam material into foam product 13 in mold 1. The holding structure includes an upper mold 2 and a lower mold 3.

[0038] The upper mold 2 is used to close or open the mold with the lower mold 3, and the side of the upper mold 2 near the lower mold 3 has a mold closing protrusion 7, which has an upper mold cavity 8.

[0039] The lower mold 3 has a lower mold cavity 4 on the side close to the upper mold 2, and the lower mold cavity 4 has a material-collecting structure.

[0040] In addition to filling the lower mold cavity 4 with the required material, the upper mold cavity 8 is filled with the required material using the material-collecting structure. After the mold is closed, the material from the lower material-collecting structure is squeezed and filled into the upper mold cavity 8 using the mold-closing protrusion 7.

[0041] In this embodiment, the foaming material includes, but is not limited to, E-TPU and PU.

[0042] In existing related technologies, when producing foamed products 13 using upper and lower molds by mixing foamed materials (such as TPU glue and ETPU particles, hereinafter also referred to as materials, material particles, or molding materials), the molding materials are dropped / injected into the mold cavity of the lower mold through the machine discharge. Since the molding materials enter the mold cavity in a free fall manner, it is only suitable for making products where the highest point of the material particles coincides with the parting surface. That is, the upper mold cannot make a deep cavity. Therefore, the molded foamed products 13 are mostly made of sheet materials such as shoe soles.

[0043] In order to solve or improve the problem that "it is only suitable for making products where the highest point of the material particles coincides with the parting surface (the upper mold cannot make a deep cavity)," in this embodiment, there is a material-collecting structure on the lower mold cavity 4, which allows the upper mold 2 to make a deeper cavity. This allows the material particles in the lower mold cavity 4 of the lower mold 3 and the upper mold cavity 8 of the upper mold 2 to be fully filled, thereby enabling the foamed product 13 produced by the mold 1 to have a shape such as a sphere or a complex curved surface.

[0044] In this embodiment, the material-collecting structure includes a material-collecting area 5, the top of the lower mold cavity 4 has a parting line 6, and the bottom of the material-collecting area 5 is integrally connected to the parting line 6. The top position of the material-collecting area 5 does not exceed the upper end face of the lower mold 3, or the top position of the material-collecting area 5 is flush with the upper end face of the lower mold 3, or the top position of the material-collecting area 5 exceeds the upper end face of the lower mold 3;

[0045] The parting line 6 is positioned below the upper surface of the lower mold 3, or the parting line 6 is flush with the upper surface of the lower mold 3, or the parting line 6 is positioned above the upper surface of the lower mold 3.

[0046] In this embodiment, the example is taken where the top of the material-collecting area 5 does not exceed the upper surface of the lower mold 3 and the parting line 6 is lower than the upper surface of the lower mold 3.

[0047] The upper mold 2 and the lower mold 3 are provided with grooves 11 on their relatively close end faces, and an outlet area 12 for waste material discharge is formed between the two grooves 11.

[0048] In this embodiment, in order to realize products with shapes such as spheres and complex curved surfaces in the production of foamed materials, the material-holding structure solves the drawbacks of the upper mold cavity 8 of the upper mold 2 being relatively deep, where particles cannot be fully filled, the venting is not ideal, and the particles are piled up above the parting surface, resulting in insufficient filling.

[0049] First, fill the lower mold cavity 4 with the required material. When the upper mold 2 and the lower mold 3 are closed, the material can be squeezed and filled into the upper mold cavity 8 due to the presence of the material collection area 5. In this way, a large part of the material can be used to form the foamed product 13. The material squeezed out of the material collection area 5 is treated as waste and discharged from the outlet area 12. This can also reduce or eliminate the waste caused by too much foamed material being squeezed out of the mold from the parting line.

[0050] Specifically, the upper mold 2 / lower mold 3 has a positioning protrusion 9, and the lower mold 3 / upper mold 2 has a positioning hole 10 that mates with the positioning protrusion 9. Through the cooperation of the positioning protrusion 9 and the positioning hole 10, the upper mold 2 and lower mold 3 are accurately and stably engaged when they are closed. The shape of the positioning protrusion 9 matches the shape of the positioning hole 10, and can be columnar, strip-shaped, or other shapes.

[0051] Specifically, the upper mold 2 and the lower mold 3 are closed and opened by rotation or by a combination of upper and lower covers. The mold body for the rotational mold closing and opening method can be: the mold body for the combination of upper and lower covers can be: the lower mold 3 is fixed, and the upper mold 2 is moved manually or mechanically to cover the lower mold 3.

[0052] In this embodiment, the upper mold 2 and the lower mold 3 are preferably connected by a pin, hinge, pivot, or other means. To facilitate lifting and closing the upper mold 2, a handle can be provided on the upper mold 2.

[0053] In this embodiment, the material collection area 5 is cone-shaped, which can inject or accommodate a large amount of material, and the mold closing protrusion 7 is adapted to the shape of the material collection area.

[0054] Since the space of the material-collecting area 5 is close to the space of the upper mold cavity 8, and the upper mold cavity 8 is recessed inward, the material-collecting area 5 can cooperate with the upper mold cavity 8 to compress and fill the entire mold cavity, namely the upper mold cavity 8 and the lower mold cavity 4, when the mold is closed.

[0055] The shapes of the upper mold 2 and the lower mold 3 include, but are not limited to, square, circular, quadrilateral, polygonal, and irregular shapes, which can vary according to the shape of the foamed product 13. The shapes of the mold-closing protrusion 7, the upper mold cavity 8, the lower mold cavity 4, and the material-holding area 5 include, but are not limited to, square, circular, quadrilateral, polygonal, and other irregular shapes designed as needed. Irregular shapes refer to shapes that can vary according to the shape of the foamed product 13, such as bone-like shapes. This enables the mold to expand from the production of single flat sheet products in the manufacturing of foamed materials such as E-TPU and PU to the production of complex products with three-dimensional shapes in both the upper and lower mold halves.

[0056] The mold is placed vertically on the operating table. The lower mold 3 is the fixed mold and the upper mold 2 is the moving mold. After filling the lower mold cavity 4 with the required material, the material required for the upper mold cavity 8 is piled up in the cone-shaped material-collecting area 5 of the lower mold. Then, the material in the material-collecting area 5 is squeezed and piled up in the upper mold cavity 8 of the upper mold 2.

[0057] This embodiment mainly solves the problem that the upper mold cavity 8 cannot be filled with material when the mold is closed during the production of pressureless material feeding equipment (such as foam materials such as E-TPU and PU); thus greatly improving production efficiency.

[0058] In this embodiment, the material stacking space (lower mold cavity 4 and material collection area 5) of the lower mold 3 of mold 1 is equivalent to the cavity space (upper mold cavity 8) of the upper mold. Through the cooperation of the upper mold 2 and the lower mold 3, one convex (mold closing protrusion 7) and one concave (lower mold cavity 4) can fill the entire upper and lower mold cavities with the material stacking area.

[0059] In this embodiment, TPU adhesive and ETPU particles are mixed and used as foaming material, falling into the lower mold cavity 4 and the material collection area 5. Then the mold is closed, and the mold after closing can be baked at the required baking temperature. The purpose of baking is to speed up the foaming speed of the adhesive, so that the foaming material can be formed faster in the mold. Of course, foaming can also be achieved without heating, but the foaming time in the mold is relatively longer than that of drying.

[0060] The mold in this embodiment is suitable not only for manufacturing related foamed products using PU foaming technology, but also for manufacturing related foamed products using EVA foaming technology and other processes.

[0061] In this embodiment, the foamed product 13 produced by mold 1 is not limited to producing spheres and shoe soles; it is also applicable to other irregular shapes (such as bone shapes) and asymmetrical shapes.

[0062] In this embodiment, the upper mold 2 of mold 1 has a mold-closing protrusion 7, which has a certain cavity space, namely the upper mold cavity 8. Therefore, there is a parting line on the surface of the product. Specifically, as shown... Figure 5 As shown, the parting line of the upper mold 2 and the lower mold 3 forms parting line 6 in the middle of the foamed product 13.

[0063] In this embodiment, since the mold includes an upper mold 2 and a lower mold 3, which is a two-plate mold, the operation is simple and efficient, and the material collection area 5 also saves the manual scraping process.

[0064] A mold 1 includes a foam material holding structure as described above. The specific structure of the foam material holding structure is as described in the above embodiments. Since this mold 1 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here.

[0065] The remaining parts not described in this utility model are existing technologies.

[0066] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A foamed material pocket structure, characterized by, The foaming material is pressed into a foamed product (13) in a mold (1), and the material holding structure includes an upper mold (2) and a lower mold (3). The upper mold (2) is used to close or open the mold with the lower mold (3), and the side of the upper mold (2) near the lower mold (3) has a mold closing protrusion (7), which has an upper mold cavity (8). The lower mold (3) has a lower mold cavity (4) on the side close to the upper mold (2), and the lower mold cavity (4) has a material-holding structure.

2. A structure of pockets of foamed material as claimed in claim 1, wherein, The required material is piled up in the lower mold cavity (4), and the required material is piled up in the upper mold cavity (8) using the material-collecting structure. After the mold is closed, the material from the lower material-collecting structure is squeezed and piled up in the upper mold cavity (8) using the mold-closing protrusion (7).

3. A structure of pockets of foamed material according to claim 1 or 2, characterised in that The material-holding structure includes a material-holding area (5), the top of the lower mold cavity (4) has a parting line (6), and the bottom of the material-holding area (5) is integrally connected with the parting line (6).

4. A structure of pockets of foamed material as defined in claim 3, characterized in that The top of the material-collecting area (5) is lower than the upper surface of the lower mold (3), or the top of the material-collecting area (5) is flush with the upper surface of the lower mold (3), or the top of the material-collecting area (5) is higher than the upper surface of the lower mold (3). The parting line (6) is positioned below the upper surface of the lower mold (3), or the parting line (6) is level with the upper surface of the lower mold (3), or the parting line (6) is positioned above the upper surface of the lower mold (3).

5. A structure of pockets of foamed material as defined in claim 1, characterized in that The upper mold (2) and the lower mold (3) are provided with grooves (11) on their relatively close end faces, and an outlet area (12) for waste discharge is formed between the two grooves (11).

6. A structure of pockets of foamed material as defined in claim 1, characterized in that The upper mold (2) / lower mold (3) has a positioning protrusion (9), and the lower mold (3) / upper mold (2) has a positioning hole (10) that engages with the positioning protrusion (9).

7. A structure of pockets of foamed material as defined in claim 1, characterized in that The upper mold (2) and the lower mold (3) are closed and opened by rotation or by upper and lower cover.

8. The foamed material holding structure as described in claim 2, characterized in that, The upper mold (2) and the lower mold (3) are square, circular, quadrilateral, polygonal or irregular in shape; The mold-closing protrusion (7), upper mold cavity (8), lower mold cavity (4) and material-collecting area (5) are square, circular, quadrilateral or irregular in shape.

9. A mold (1) characterized in that, The mold (1) includes a foam material holding structure as described in any one of claims 1 to 8.

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