Sole forming mold

Abstract

The shoe sole forming die is used for forming a shoe sole, and comprises a first die part and a second die part which can be combined or separated from each other; a die chamber which is defined by the first die part and the second die part and is located between the first die part and the second die part, the die chamber is closed when the first die part and the second die part are combined with each other, and the die chamber is opened when the first die part and the second die part are separated from each other; a main flow channel which is arranged on the first die part and forms an inlet on the outer side surface of the first die part; two branch flow channels which are arranged on the first die part and are communicated with the main flow channel, and each of the two branch flow channels forms an outlet on a side wall of the die chamber. The shoe sole forming die is used for manufacturing a shoe sole which has different densities and is wrapped with a reinforcing element.

Description

Technical Field

[0001] This utility model relates to polymer molding and processing technology, and in particular to a shoe sole molding mold. Background Technology

[0002] Traditional soles that provide cushioning with a single elastic element are no longer sufficient to meet users' needs. Therefore, various technologies have been developed to give soles different densities in different parts to provide better cushioning and elasticity. Some even incorporate reinforcing plates such as carbon fiber plates to provide better elasticity and support.

[0003] However, the technology provided by Xizhi is still not perfect in terms of manufacturing technology for shoe soles with an open-top design, and there is still room for improvement. Utility Model Content

[0004] The main objective of this invention is to provide a shoe sole molding mold for manufacturing shoe soles with different densities and reinforced elements.

[0005] To achieve the above objectives, the shoe sole molding technology provided by this utility model allows the melt, which is used as a foaming molding raw material, to enter the mold chamber through multiple openings formed on the mold chamber wall by a plurality of dispersed branch channels. Each branch channel enters the mold chamber at multiple points at different locations. Each of these branch channels is connected to a main channel in pairs, thereby allowing the melt to enter the mold chamber from the outside through the flow channel formed by the main channel and two branch channels connected to the main channel, so that the melt can be properly dispersed in the mold chamber.

[0006] Furthermore, it can make the flow rate of the melt in the main channel and the branch channel substantially the same, thereby controlling the amount of raw material entering from multiple points to be substantially the same.

[0007] Furthermore, the shoe sole molding technology provided by this utility model is more conducive to the manufacturing of shoe sole products with multiple components. Technically, it involves simultaneously or sequentially placing a first preform, which has already been foamed and molded externally, and a one-piece reinforcing component into the mold chamber while the mold is open. After the mold is closed, the mold applies appropriate positioning to the placed first preform and reinforcing component to prevent unintended movement within the mold chamber, thus ensuring the quality of the final molded product. Subsequently, a melt composed of a second raw material is injected into the mold chamber through the aforementioned flow channel. This multi-point dispersed injection method allows for… The weight of the melt itself is distributed across the first blank and the reinforcing member in the mold chamber, avoiding the potential displacement of the first blank or the reinforcing member due to excessive weight concentration. At the same time, to prevent the kinetic energy of the melt flow from directly acting on the reinforcing member when it enters the mold chamber, which could cause the reinforcing member to deviate from its proper position, the present invention further ensures that the position of the reinforcing member in the mold chamber is not directly impacted by the melt upon entering the mold chamber. To this end, the present invention ensures that when the reinforcing member is projected orthographically along the axial direction of each outlet, each outlet is not blocked by the reinforcing member in that projection direction.

[0008] In addition, in order to allow the second raw material composition to be foamed and molded into a second preform in the mold chamber and then bonded to the first preform placed in advance, this invention makes the first raw material composition used to make the first preform contain the same base material as the second raw material composition. This allows the melt of the second raw material composition to come into contact with the first preform in the mold chamber and then bond to each other through the same base material during the subsequent foaming and molding process, thereby bonding the second preform to the first preform. At the same time, a reinforcing member is wrapped between the first preform and the second preform, and they are molded together by the mold chamber into the corresponding shoe sole shape.

[0009] The shoe sole molding die provided by this utility model is used to mold a shoe sole, which includes a first mold part and a second mold part that can be combined or separated; a mold chamber defined by the first mold part and the second mold part, located between the first mold part and the second mold part, the mold chamber is closed when the first mold part and the second mold part are combined, and the mold chamber is opened when the first mold part and the second mold part are separated; a main channel is provided on the first mold part and an inlet is formed on the outer surface of the first mold part; two branch channels are respectively provided on the first mold part and connected to the main channel, and each branch channel forms an outlet on one side wall of the mold chamber.

[0010] The mold chamber can accommodate a single-piece reinforcing member when it is open.

[0011] When the first module and the second module are combined, when the reinforcement is projected onto the axial direction of each outlet, each outlet will not be blocked by the reinforcement in the projection direction.

[0012] The reinforcing member includes at least two through holes, each coaxial with the axial direction of the outlet.

[0013] The reinforcing element is located between each of the outlets.

[0014] The sole is the midsole.

[0015] The mold contains two mold chambers.

[0016] The mold contains two main channels and two pairs of branch channels, with the outlets formed by each branch channel on the mold chamber wall corresponding to different positions of the shoe sole shape.

[0017] The advantages of this utility model are: This invention provides a shoe sole molding die for manufacturing shoe soles with different densities and reinforced elements. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a preferred embodiment of the present invention.

[0019] Figure 2 yes Figure 1 A magnified view of a section marked with the symbol Z in the center.

[0020] Figure 3 This is a top view of the mold used in a preferred embodiment of this utility model.

[0021] Figure 4 This is a preferred embodiment of the present invention. Figure 3 Schematic cross-sectional view along the 4-4 direction. Detailed Implementation

[0022] Firstly, it should be noted that the ordinal numbers such as "first" and "second" used in this specification and the scope of the claims are only used to distinguish the names of the same components and have no technical significance in themselves. In use, when a component name is prefixed with an ordinal number, it specifically refers to the specific component with that prefix ordinal number, while when it is not prefixed with an ordinal number, it generally refers to components with the same name. For example, if the specification already refers to "first module" and "second module", then saying "multiple of these modules" or "each of these modules" generally refers to the component name as a module when the prefix is ​​removed, which includes both the first "module" and the second "module".

[0023] Please see Figures 1 to 3As shown, the shoe sole forming method and mold provided in a preferred embodiment of this utility model, wherein the shoe sole 20 is taken as an example of the shoe midsole but is not limited thereto, includes the following steps: Step A: Take the mold A mold is used, the composition of which is similar to that of a conventional multi-piece mold, including a first mold part 11 and a second mold part 12 that can be combined or separated from each other. The separation or combination is carried out by a conventional external power clamping device, which will not be described in detail here. In the combined state, the first mold part 11 and the second mold part 12 jointly define a first mold chamber 13 and a second mold chamber 14 that are in a closed state. Each of the mold chambers (13) and (14) can change from a closed state to an open state when the mold parts (11) and (12) are separated. The shape of each mold chamber (13) (14) is used to mold the appearance shape of the shoe midsole, and in this embodiment, the shape is further configured such that the first mold chamber 13 conforms to the shape of the human left foot and the second mold chamber 14 conforms to the shape of the human right foot, and they are located side by side between the first mold part 11 and the second mold part 12. Two first main channels 15 and two second main channels 16 are respectively disposed on the first mold part 11, and each forms a hole-shaped inlet on the outer surface of the first mold part 11. Two pairs of first branch channels 17 are respectively connected to each of the first main channels 15, and each forms a hole-shaped first outlet on the chamber wall of the first mold chamber 13. Two pairs of second branch channels 18 are respectively connected to each of the second main channels 16, and each forms a hole-shaped second outlet on the chamber wall of the second mold chamber 14. In this way, when each of the mold parts (11) and (12) is combined into a closed state and each of the mold chambers (13) and (14) is closed, each of the main channels (15) and (16) communicates with each of the first mold chambers 13 or the second mold chambers 14 through each of the branch channels connected to itself, thereby forming a flow channel that allows external polymer raw materials to enter each of the mold chambers (13) and (14).

[0024] Step B: Open the mold By using the conventional clamping device described above, the external force required for mold opening is applied to the mold, causing the first mold part 11 and the second mold part 12 to separate into an open state, thereby releasing each mold chamber (13)(14) and thus making each mold chamber (13)(14) open. At the same time, the first mold part 11 and the second mold part 12 are separated by an appropriate working distance, thereby forming an appropriate operating space between each mold part (11)(12) so that workers or robotic arms can perform operations such as cleaning, material handling, spraying release agent or filler on the mold chamber.

[0025] Step C, Place the first embryo 21 Two first preforms 21, which have already been foamed externally with a first raw material, are respectively filled into the first mold chamber 13 and the second mold chamber 14, which are in an open state.

[0026] Step D: Place reinforcement component 22 Two sheet-shaped reinforcing members 22 are respectively filled into the open first mold chamber 13 and the second mold chamber 14, and each of them is attached to the first blank 21 that has been placed in the mold chamber.

[0027] Step E: Close the mold Using a conventional clamping device, the external force required for mold closing is applied to the mold, causing the first mold part 11 and the second mold part 12 to merge together, thereby changing each mold chamber (13) (14) from the open state to the closed state. At the same time, the mold restricts each of the first blanks 21 and each of the reinforcing members 22 filled in steps C and D, so as to prevent each of the first blanks 21 and each of the reinforcing members 22 from being displaced in the closed mold chambers (13) (14), thus affecting the quality of the final product.

[0028] Step F, Injection The second raw material composition, which has been heated and pressurized externally to become a flowable melt (melt, 231), is pushed by an injection or extrusion device such as a conventional injection cylinder, so that it passes through the corresponding flow channels through each of the inlets and quantitatively enters the first mold chamber 13 and the second mold chamber 14 respectively from each of the first outlets and each of the second outlets.

[0029] Step G, foaming and molding The second raw material melt 231, which has entered each mold chamber (13) and (14), is foamed and molded into a second preform 23 by each mold chamber (13) and (14). After entering each mold chamber (13) and (14), the second raw material melt 231 contacts the surface of each first preform 21. During the subsequent foaming and molding process, the second preform 23 is bonded to the first preform 21 at the contact points through the bonding of the same base material contained in the second raw material. Simultaneously, the reinforcing member 22 is wrapped between the first preform 21 and the second preform 23, so that they are jointly molded into a shoe midsole product with the same shape as each mold chamber (13) and (14). The foaming agent contained in the second raw material can be physical, such as a supercritical fluid composed of inert gases such as nitrogen or carbon dioxide.

[0030] Step H: Open the mold and remove the finished product. Using a conventional clamping device, the external force required for mold opening is applied to the mold, so that the first mold part 11 and the second mold part 12 are separated from each other and a working space is formed therebetween, so that the operator or the robotic arm can take out the molded shoe midsole finished product from the open mold chambers (13) (14).

[0031] In the above steps, it should be specifically noted that, in order to achieve a better wearing experience for the formed shoe midsole, when the first preform 21 is placed at the heel area of ​​the midsole, since this area has higher requirements for shock absorption and cushioning, the average hardness and average density of the first preform 21 can be lower than those of the second preform 23. This results in a better wearing experience for the finished shoe midsole. However, the above-mentioned setting of changing the physical properties of the first preform 21 according to its location is not a one-size-fits-all approach. For example, in this embodiment, since the reinforcement plate has already provided stability and support for the midfoot part of the shoe midsole, the location of the first preform 21 can be further extended to parts other than the heel, such as the midfoot part of the shoe midsole, or even the forefoot part. The first preform 21, which has a low average density and low average hardness, can provide suitable cushioning and shock absorption. The selection of these locations involves the functional design of the shoe midsole itself, which is not within the technical scope claimed by the technology disclosed in this case, and will not be explained in detail here.

[0032] In step F, if the kinetic energy of the melt 231 directly acts on the reinforcing plate when it enters the mold chamber, it may cause displacement of the reinforcing plate. To avoid this, each outlet and each reinforcing plate is further configured to have a spatial correspondence where they do not interfere with each other. That is, when the reinforcing member 22 is projected orthographically along the axial direction of each outlet, each outlet will not be blocked by the reinforcing member in that projection direction, thereby avoiding the displacement that may occur if the kinetic energy of the melt flow directly acts on the reinforcing plate. The so-called effect of the reinforcing member not blocking can be achieved by positioning the reinforcing plate between adjacent outlets (e.g., Figure 1As shown in the figure), or by directly setting multiple through holes (not shown) on the reinforcing sheet that are coaxial with each of the outlets, the effect of preventing the kinetic energy of the melt flow from directly acting on the reinforcing sheet can be achieved. Furthermore, when the melt enters each mold chamber through each of the main channels and the directly connected branch channels, the amount of material entering at a single location can be reduced by the dispersed multiple outlets, thereby reducing the weight of the melt borne by the reinforcing sheet at a single location. Through dispersed multi-point injection, the reinforcing sheet can bear the weight of the melt at multiple points in different parts of its whole, avoiding the situation where the reinforcing sheet may shift due to uneven distribution of melt weight. Furthermore, by using techniques to further assist in the even distribution of weight, the flow velocity of the melt in each main channel and each branch channel can be substantially the same, thereby making the amount of melt discharged at each outlet substantially the same.

[0033] The above description is a preferred embodiment of the present utility model and the technical principles applied thereto. For those skilled in the art, any obvious changes such as equivalent transformations or simple substitutions based on the technical solution of the present utility model without departing from the spirit and scope of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A shoe sole forming mold for forming a shoe sole, characterized in that, It includes: A first module and a second module that can be combined or separated from each other; A mold chamber, defined by the first mold part and the second mold part, is located between the first mold part and the second mold part. The mold chamber is closed when the first mold part and the second mold part are joined together, and the mold chamber is opened when the first mold part and the second mold part are separated. A main channel is provided on the first module and an entrance is formed on the outer surface of the first module; Two branch channels are respectively located on the first module and connected to the main channel, and each has an outlet on one side wall of the module chamber.

2. The shoe sole forming mold as described in claim 1, characterized in that, The mold chamber can accommodate a single-piece reinforcing member when it is open.

3. The shoe sole forming mold as described in claim 2, characterized in that, When the first module and the second module are combined, when the reinforcement is projected onto the axial direction of each outlet, each outlet will not be blocked by the reinforcement in the projection direction.

4. The shoe sole forming mold as described in claim 3, characterized in that, The reinforcing member includes at least two through holes, each coaxial with the axial direction of the outlet.

5. The shoe sole forming mold as described in claim 3, characterized in that, The reinforcement is located between each of the outlets.

6. The shoe sole forming mold as described in claim 1, characterized in that, The sole is the midsole.

7. The shoe sole forming mold as described in claim 1, characterized in that, The mold contains two chambers.

8. The shoe sole forming mold as described in claim 1, characterized in that, The mold contains two main channels and two pairs of branch channels, and the outlets formed by each branch channel on the mold chamber wall correspond to different positions of the shoe sole shape.

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