A foamed material pocket structure and a mold containing the same

Abstract

The utility model relates to foaming mould technical field especially for foaming material material holding structure and contain this structure's mould, this material holding structure includes upper die, middle plate and lower die, middle plate is used for respectively with upper die and lower die between closing mould or opening mould, the one side of lower die close to middle plate is provided with lower die cavity, has with the material holding structure opposite position of lower die cavity on middle plate, is full of required material of making in lower die cavity, utilizes material holding structure to accumulate required material of making of upper die cavity, after closing mould, utilizes closing mould convex and fills up upper die cavity after extruding the material of lower material holding structure. The utility model, through material holding structure solves the upper die of mould is deeper upper die cavity, the particle in upper die cavity cannot fill full, exhaust is not ideal, and the particle stockpile is higher than the parting surface and fills the insufficient drawback, mainly solves the problem that the mould closing mould cannot fill the material of upper die cavity when the pressureless blanking equipment is in production, and the 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 a mold containing the structure. Background Technology

[0002] In the production of foamed products using materials such as E-TPU (Expanded Thermoplastic Polyurethane) and PU (polyurethane), 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 past 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

[0003] The purpose of this invention is to provide a foam material holding structure and a mold containing the structure, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] 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, a middle plate and a lower mold.

[0006] The middle plate is used to close or open the mold with the upper mold and the lower mold respectively, and the side of the upper mold near the middle plate has a mold closing protrusion, which has an upper mold cavity.

[0007] The lower mold has a lower mold cavity on the side near the middle plate, and the middle plate has a material catchment structure opposite to the lower mold cavity.

[0008] Furthermore, after the lower mold cavity is filled with the required material, the upper mold cavity 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 using the mold-closing protrusion.

[0009] Furthermore, the material-collecting structure includes a material-collecting area that penetrates the middle plate. After mold closing, there is a parting line between the top of the lower mold cavity and the bottom of the material-collecting area, and a parting line between the bottom of the upper mold cavity and the top of the material-collecting area.

[0010] Furthermore, the parting line between the bottom of the upper mold cavity and the top of the material-collecting area is positioned lower than the upper surface of the middle plate.

[0011] Furthermore, both the middle plate and the lower mold have notches on one side for inserting and lifting fingers into the upper mold and the middle plate.

[0012] Furthermore, the upper mold and the lower mold / upper middle plate have positioning protrusions, and the middle plate / lower mold and the upper mold have positioning grooves that engage with the positioning protrusions.

[0013] Furthermore, the upper mold, middle plate, and lower mold are joined and opened by rotation or by upper and lower cover joining.

[0014] Furthermore, the foaming material is E-TPU or PU.

[0015] Furthermore, the upper mold plate and the lower mold are square, circular, quadrilateral or polygonal in shape;

[0016] The mold closing protrusion, upper mold cavity, lower mold cavity, and material collection area are square, circular, or quadrilateral in shape.

[0017] To achieve the above objectives, this utility model also provides the following technical solution:

[0018] A mold comprising the aforementioned foam material holding structure.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] This utility model addresses the shortcomings of traditional molds, such as the inability of foamed materials to fully fill the upper mold cavity due to its deep upper mold cavity, poor venting, and insufficient filling of foamed materials above the parting line, in order to realize the production of foamed materials with shapes such as spheres and complex curved surfaces.

[0021] In this invention, the required foaming material is first piled up in the lower mold cavity, the middle plate and the lower mold are covered, the upper mold is pushed open, and foaming material is dropped / injected into the inlet to fill the cavity (i.e., the material-collecting area) of the middle plate. Then the upper mold is closed. When the upper mold and the middle plate are closed with the lower mold, the material-collecting area allows the material to be squeezed and piled up in the upper mold cavity. In this way, most of the material can be used to form foamed products. This also reduces the waste caused by the foaming material being squeezed out of the mold from the parting line due to just enough or slightly too much being injected.

[0022] 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 foamed material used and fill the entire mold cavity when the mold is closed.

[0023] 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.

[0024] This utility model, because the mold includes an upper mold, a middle plate and a lower mold, is a three-plate mold. Therefore, it is not only simple and efficient to operate, but also has a material-collecting area that saves the manual leveling process. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the upper mold and middle plate mold opening structure of this utility model.

[0026] Figure 2 This is a schematic diagram of the upper mold, middle plate, and lower mold structure of this utility model.

[0027] Figure 3 This is a schematic diagram of the mold-closing structure of this utility model.

[0028] Figure 4 This utility model Figure 3 Another perspective structural diagram.

[0029] Figure 5 This utility model Figure 4 Cross-sectional view of section AA (indicating a foamed product).

[0030] Figure 6 This is a schematic diagram of the foamed product of this utility model, which is spherical in shape.

[0031] 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 groove, 11-Middle plate, 12-Allowing groove, 13-Foamed product, 14-Notch, 15-Rotating shaft. Detailed Implementation

[0032] 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.

[0033] 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.

[0034] 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.

[0035] Please see Figures 1 to 6 This utility model provides a technical solution:

[0036] 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, a middle plate 11 and a lower mold 3.

[0037] The middle plate 11 is used to close or open the mold with the upper mold 2 and the lower mold 3 respectively, and the upper mold 2 has a mold closing protrusion 7 on the side near the middle plate 11, and the mold closing protrusion 7 has an upper mold cavity 8.

[0038] The lower mold 3 has a lower mold cavity 4 on the side near the middle plate 11, and the middle plate 11 has a material-collecting structure opposite to the lower mold cavity 4.

[0039] The lower mold cavity 4 is filled with the required material, and 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 by the mold-closing protrusion 7 and then filled into the upper mold cavity 8.

[0040] In this embodiment, the foaming material includes, but is not limited to, E-TPU and PU.

[0041] 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 material is injected into the mold cavity of the lower mold through the machine discharge. Since the material enters the mold cavity in a free fall manner when it is injected, 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.

[0042] To address or improve the problem of "only suitable for products where the highest point of the material particles coincides with the parting line (the upper mold cannot make a deep cavity)," this embodiment includes a material-collecting structure on the middle plate 11, the position of which corresponds to the position of the lower mold cavity 4. This allows the upper mold 2 to have a deeper cavity, thus ensuring that 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 are fully filled. This enables the foamed product 13 produced by the mold 1 to have shapes such as spheres and complex curved surfaces.

[0043] In this embodiment, the material-collecting structure includes a material-collecting area 5, which penetrates the middle plate 11. After the mold is closed, there is a parting line 6 between the top of the lower mold cavity 4 and the bottom of the material-collecting area 5, and there is also a parting line 6 between the bottom of the upper mold cavity 8 and the top of the material-collecting area 5.

[0044] 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, the material particles in the upper mold cavity 8 not being able to fill the cavity fully, the venting being unsatisfactory, and the material particles being higher than the parting surface and thus not filling the cavity fully.

[0045] like Figures 1 to 3 As shown, first fill the lower mold cavity 4 with the required material, then cover the middle plate 11 and the lower mold 3, push open the upper mold 2, and pour / inject the material into the inlet to fill the cavity (i.e., the material-collecting area 5) of the middle plate 11. Then cover the upper mold 2. When the upper mold 2 and the middle plate 11 are closed with the lower mold 3, due to the existence of the material-collecting area 5, the material can be squeezed and piled up to fill the upper mold cavity 8. In this way, most of the material can be used to form the foamed product 13. This can also reduce or eliminate the waste caused by too much foamed material being squeezed out of the mold from the parting line.

[0046] Specifically, the upper mold 2 and the lower mold 3 (or the upper middle plate 11) have positioning protrusions 9, and the middle plate 11 (or the lower mold 3 and the upper mold 2) has positioning grooves 10 that mate with the positioning protrusions 9. Through the cooperation of the positioning protrusions 9 and the positioning grooves 10, the fit is accurate and stable when the upper mold 2 and the middle plate 11 are together, and when the upper mold 2, the middle plate 11, and the lower mold 3 are together. The shape of the positioning protrusions 9 matches the shape of the positioning grooves 10, and can be columnar, strip-shaped, or other shapes.

[0047] Specifically, the upper mold 2 and the lower mold 3 are closed and opened by rotation or by a combination of upper and lower cover. The combination of upper and lower cover can be as follows: the lower mold 3 is fixed, and the middle plate 11 and the upper mold 2 are moved manually or mechanically to cover the lower mold 3.

[0048] In this embodiment, a rotational method is preferred for mold closing and opening, as detailed below. Figure 4 As shown: Both the middle plate 11 and the lower mold 3 have clearance grooves 12 on their back sides for placing the rotating shaft 15. The upper mold 2 and the middle plate 11 are hinged together by the upper rotating shaft 15, so that the upper mold 2 can rotate relative to the middle plate 11 to open and close. The middle plate 11 and the lower mold 3 are hinged together by the lower rotating shaft 15, so that the middle plate 11 can rotate relative to the lower mold 3 to open and close.

[0049] Specifically, both the middle plate 11 and the lower mold 3 have notches 14 on one side for fingers to penetrate and lift the upper mold 2 and the middle plate 11, so that operators can use their hands to lift or cover the middle plate 11 and the upper mold 2 or lift or cover the upper mold 2 separately through the notches 14.

[0050] 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 the material used and fill the entire mold cavity, namely the upper mold cavity 8 and the lower mold cavity 4, when the mold is closed.

[0051] The shapes of the upper mold 2 and the lower mold 3 include, but are not limited to, square, circular, quadrilateral, polygonal and other irregular shapes designed as required; 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 required. Irregular shapes refer to shapes that can vary according to the shape of the foamed product 13, such as bone shape, thereby realizing the expansion from the production of single flat sheet products to the preparation of complex products with three-dimensional shapes in both upper and lower molds when pressing / making foamed materials such as E-TPU and PU in molds.

[0052] In this embodiment, the material-collecting area 5 is cone-shaped, which can drop / inject or accommodate a large amount of foam material, and the mold-closing protrusion 7 is adapted to the shape of the material-collecting area.

[0053] The mold is placed vertically on the operating table. The lower mold 3 is the fixed mold, and the upper mold 2 (and the middle plate) is the moving mold.

[0054] Step 1: Push open the connection between the middle plate 11 and the lower mold 3 to expose the lower mold cavity 4 of the lower mold 3, and fill the lower mold cavity 4 with material;

[0055] Step 2: Cover the middle plate 11 and the lower mold 3, push open the upper mold 2, lower the material into the inlet, fill the material collection area 5 of the middle plate 11 with material, and then cover the upper mold 2.

[0056] After the mold is closed, the conical material-collecting area 5 can work with the mold-closing protrusion 7 and the upper mold cavity 8 to compress and fill the entire mold cavity, especially after extrusion, it fills the upper mold cavity 8.

[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 lower mold cavity 4 of the lower mold 3 of the mold 1, the material-collecting area of ​​the middle plate 11, and the upper mold cavity 8 of the upper mold all serve as material-filling spaces. Through the cooperation of the upper mold 2 with the middle plate 11 and the lower mold 3, the material in the material-filling area can be pressed to fill the entire upper and lower mold cavities by a convex part (mold closing protrusion 7) and a concave part (material-collecting area 5 and lower mold cavity 4).

[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 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. When the upper mold 2 and the middle plate 11 are closed, the upper mold cavity 8 extends into the material-collecting area 5. When the middle plate 11 and the lower mold 3 are closed, the bottom of the material-collecting area 5 is correspondingly attached to the lower mold cavity. Therefore, the surface of the foamed product 13 has two parting lines. Specifically, as shown in the figure... Figure 6As shown, the parting line of the upper mold 2 and the middle plate 11 forms parting line 6 at the upper part (near the top) of the foamed product 13; the parting line of the middle plate 11 and the lower mold 3 forms parting line 6 at the middle part of the foamed product 13.

[0063] In this embodiment, since the mold includes an upper mold 2, a middle plate 11 and a lower mold 3, it is a three-plate mold, which makes the operation simple and efficient. 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, which will not be described in detail here.

[0065] The parts not described herein 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 holding structure, characterized in that, The foaming material is pressed into a foamed product (13) in a mold (1). The material holding structure includes an upper mold (2), a middle plate (11) and a lower mold (3). The middle plate (11) is used to close or open the mold with the upper mold (2) and the lower mold (3) respectively, and the upper mold (2) has a mold closing protrusion (7) on the side close to the middle plate (11), and the mold closing protrusion (7) has an upper mold cavity (8). The lower mold (3) has a lower mold cavity (4) on the side close to the middle plate (11), and the middle plate (11) has a material-collecting structure opposite to the position of the lower mold cavity (4).

2. The foamed material holding structure as described in claim 1, characterized in that, 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 foamed material holding structure as described in claim 1 or 2, characterized in that, The material-holding structure includes a material-holding area (5), which penetrates the middle plate (11). There is a parting line (6) between the top of the lower mold cavity (4) and the bottom of the material-holding area (5), and there is a parting line (6) between the bottom of the upper mold cavity (8) and the top of the material-holding area (5).

4. The foamed material holding structure as described in claim 3, characterized in that, The parting line (6) between the bottom of the upper mold cavity (8) and the top of the material collection area (5) is lower than the upper surface of the middle plate (11).

5. The foamed material holding structure as described in claim 1, characterized in that, Both the middle plate (11) and the lower mold (3) have notches (14) on one side for fingers to penetrate and lift the upper mold (2) and the middle plate (11).

6. The foamed material holding structure as described in claim 1, characterized in that, The upper mold (2) and the lower mold (3) / upper middle plate (11) have positioning protrusions (9), and the middle plate (11) / lower mold (3) and the upper mold (2) have positioning grooves (10) that cooperate with the positioning protrusions (9).

7. The foamed material holding structure as described in claim 6, characterized in that, The upper mold (2), middle plate (11) and 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) middle plate (11) and 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, 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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