TWM604269U - Scalable mold structure - Google Patents

Abstract

A retractable mold structure, comprising: an upper cover and a bottom cover, the upper cover is closed on the bottom cover and forms an accommodating space with a concave portion of the bottom cover; and there is a flexible space between the upper cover and the bottom cover The telescopic structure makes the range of the accommodating space adjustable; through the design of the telescopic mold structure, the foaming process can be appropriately pressurized or pressed multiple times according to the requirements of the foaming material to improve foaming The compression density between materials and the improvement of thermal conductivity can also control the molding density and thickness of foam molding, and improve the surface flatness and improve product yield.

Description

Scalable mold structure

A kind of mold, especially a kind of stretchable mold that can give the foaming material one or more times of pressure through the stretchable structure in the process of the foaming process.

Foamed beads were mainly used in cushioning materials or packaging materials such as polystyrene (polystyrene, PS) in the early days, but in recent years, due to the expansion of new applications of shoe materials, as well as the advertising and marketing of major shoe manufacturers , The materials and foam molding technology of foamed beads have gradually returned to the mainstream development market, attracting the attention of many manufacturers and developers.

At present, the processing of foamed beads can be divided into two major stages. The first is to form the foamed material into individual foamed beads, and the second is to introduce the foamed beads into the mold of the final molded body. In the process, the temperature and pressure of high-pressure steam are used to compress the foamed beads and combine the foamed beads into a molded body.

However, the aforementioned process requires the foam molding processing plant to invest in additional equipment to introduce high-pressure steam, which not only increases the cost of production and processing, and the high-pressure steam equipment is used in the foaming bead molding process. Usually it can only reach 150 ^o C, which is not suitable for other foam material processes that require high temperature molding. This adds to the doubts and cost pressures of foam molding processing plants about investing in high-pressure steam equipment.

In order to solve the need for additional equipment using high-pressure water vapor in the current foaming bead processing and molding process, and the production cost burden that may be caused by the foaming molding processing plant, the present invention provides a retractable mold structure and its foaming process. In addition to the equipment that needs to introduce high-pressure water vapor to achieve the processing and molding of the foamed beads, the equipment and process provided by this new model can also be used in the manufacturing process of other foam materials without being limited by the processing and molding temperature. It can reduce the burden of equipment investment cost in foam molding processing plants, and even expand the application scope of its foam molding products.

The present model provides a retractable mold structure, which comprises: an upper cover and a bottom cover, the upper cover is closed on the bottom cover and forms an accommodating space between a concave portion of the bottom cover; and the upper cover and the bottom cover There is a retractable structure in the room, so that the range of the accommodating space can be adjusted.

Wherein, the retractable structure is that the inner or outer surface of the upper cover is provided with a threaded surface of the upper cover, and the inner or outer surface of the bottom cover is provided with a threaded surface of the lower cover that can be combined with the threaded surface of the upper cover correspondingly.

Wherein, in the telescopic structure, the upper cover is provided with a telescopic block that can be pressed down and rebounded.

Wherein, a middle cover is included between the upper cover and the bottom cover.

Preferably, the middle cover is a plurality of blocks.

Wherein, the bottom cover is provided with a cooling device or a heating device.

Wherein, the material of the upper cover and the bottom cover is plastic, silicon rubber, rubber, metal, glass or ceramic.

Wherein, the retractable mold structure includes an input channel and an output channel.

According to the above description, the advantages of the new type of retractable mold structure are as follows:

1. This new model does not need to introduce additional high-pressure water vapor equipment like the existing foaming bead process. Through the design of the retractable mold structure, the foaming process can be appropriately pressurized according to the needs of the foaming material, even Multiple pressings can increase the compression density between foam materials and improve thermal conductivity. It can also control the molding density and thickness of foam molding, improve surface flatness, increase product yield, and save foam molding processing plants. Go to the cost of purchasing high-pressure steam equipment.

2. The new type of retractable mold structure can be matched with the heating method of the foaming process to select the mold material, so it is not limited to the temperature limit of the heating source, and can be widely used in the molding and production of various foam products.

In order to understand the technical features and practical effects of the present invention in detail, and implement it in accordance with the content of the specification, the preferred embodiment shown in the figure is further described in detail as follows.

"Embodiment of retractable mold structure 1 》

Please refer to Figure 1, the present invention first provides a retractable mold structure 10, the first preferred embodiment includes: an upper cover 11 and a bottom cover 13, the upper cover 11 can be closed on the bottom cover 13, and the bottom An accommodating space 12 is formed between the concave portions of the cover 13.

In this embodiment, in order to achieve the effect of the mold being stretchable, the bottom of the upper cover 11 is preferably convex and covers the concave portion included in the bottom cover 13 to form the accommodating space 12, and the upper cover 11 An upper cover threaded surface 111 is provided on the peripheral edge of the outer surface, and a bottom cover threaded surface 131 is provided on the peripheral edge of the inner surface of the bottom cover 13 which can be combined with the upper cover threaded surface 111 correspondingly. However, the aforementioned threaded surface 111 of the upper cover and the threaded surface of the bottom cover 131 are not limited to be provided on the outer surface or the inner surface of the upper cover 11 and the bottom cover 13, but only on the upper cover 11 and the bottom cover 13 Corresponding threaded surfaces that can be combined with each other belong to the scope of this new model.

When using the upper cover 11 and the bottom cover 13 with corresponding threaded surfaces provided in this embodiment, the upper cover 11 and the bottom cover 13 are screwed together to form the accommodating space 12, and then a foam material F is used, Preferably, the shape of the foamed beads is introduced into the accommodating space 12 through a conveying and output pipe (as shown in FIG. 2), and preferably, the air originally accommodated in the accommodating space 12 can be removed at the same time. In the process, according to the molding requirements of the foamed material F, by adjusting the degree of screw closure of the upper cover 11 and the bottom cover 13, the space range of the accommodating space 12 is increased or decreased, achieving the so-called retractable mold of the present invention effect.

For the aforementioned so-called delivery and output pipelines, please refer to FIGS. 2A to 2C. In a preferred embodiment, the retractable mold structure 10 may be provided with an input channel I and an output channel O communicating with the outside. The input channel I The position and number of the output channels O are not limited. In this embodiment, the upper cover 11 is provided with one input channel I and one output channel O. After the upper cover 11 and the bottom cover 13 are closed, the foaming material F can be introduced into the accommodating space 12 through the input channel I, and at the same time the original air in the accommodating space 12 can be removed through the output channel O In specific implementation, the passage opening of the output channel O is preferably provided with a screening device, such as a filter, which can prevent the introduced foaming material F from being discharged, so as to prevent the introduced foaming material F from being discharged together with air. On the other hand, the number of the output channel O may not be limited to only one, and a plurality of holes or gaps may be provided on the retractable mold structure 10 to discharge gas, so that the foam material F can be accommodated in the accommodating space 12 in.

"Embodiment of retractable mold structure 2 》

The second preferred embodiment of the retractable mold structure 10 of the present invention is basically the same as the aforementioned first preferred embodiment, and includes the upper cover 11 and the bottom cover 13. The upper cover 11 can be closed on the bottom cover 13 and is The accommodating space 12 is formed between the concave portions of the bottom cover 13.

3, in the second preferred embodiment, the way to achieve the mold retractable effect is to provide a retractable block 21 that can be pressed down and rebounded on the upper cover 11, and pressure is applied to the retractable block 21 through external force, namely This can cause the effect of increasing or decreasing the range of the accommodating space 12.

When this embodiment is in use, the upper cover 11 and the bottom cover 13 are closed, and the foamed material F is introduced into the accommodating space 12, and the upper cover 11 and the bottom cover 13 are closed during the process, through both There are arbitrary clamps to fix the two, and apply pressure to the retractable block 21 during the foaming process to achieve the effect of increasing or decreasing the range of the accommodating space 12. On the other hand, after the upper cover 11 and the bottom cover 13 of this embodiment are closed, they are not limited to only being fixed with a clamp. The threaded surface 111 of the upper cover and the bottom cover of the first preferred embodiment can also be used. The screw surface 131 of the cover is used to fix the two, or the upper cover 11 and the bottom cover 13 are designed with a buckle structure for fixing, and the retractable block 21 is used to adjust the range of the accommodating space 12.

"Embodiment of retractable mold structure 3 》

Please refer to FIG. 4, the third preferred embodiment of the retractable mold structure 10 of the present invention is used to supplement the thread structure design of the first preferred embodiment, in view of the fact that the first preferred embodiment uses the upper cover 11 and The corresponding thread structure between the bottom cover 13 achieves the effect of making the range of the accommodating space 12 adjustable. However, such a thread design will make the upper cover 11 and the bottom cover 13 have a circular structure to be screwed together, but In order to make the shape of the product that can be molded by the retractable mold structure 10 of the present invention is not limited, a middle cover 14 may be provided between the upper cover 11 and the bottom cover 13, and the middle cover 14 is installed behind the bottom cover 13. It rotates in conjunction with the upper cover 11, so it can be formed into a non-circular or other asymmetric structure, and the accommodating space formed between the middle cover 14 and the bottom cover 13 can be resisted by the degree of rotation and depression of the upper cover 11 12 range to adjust the heating uniformity and molding effect of the foam material F.

On the other hand, the bottom cover 13 of the present invention can be provided with a heating or cooling device (not shown) according to requirements, so that the heating device can be directly heated during the molding process, or the molded foam material F can pass through the The cooling device cools and sets.

"Embodiment of retractable mold structure 4 》

Please refer to FIG. 5, the fourth preferred embodiment of the retractable mold structure 10 of the present invention is used to supplement the structural design of the middle cover 14 of the aforementioned third preferred embodiment. The middle cover 14 is preferably presented in this embodiment The state where a plurality of pieces can be spliced and formed, for example, can be split into two splicable middle cover components 141 in the thickness direction. The purpose of this design mainly includes regulating the size of the accommodating space 12 during the manufacturing process, and also Regulate the heat dissipation of the retractable mold structure 10, that is, if the foaming material F introduced in the process requires a better heat dissipation environment, fewer middle cover components 141 can be used according to requirements, so that the retractable mold is The structure 10 has better heat dissipation, which is helpful for processability and formability during processing.

"Foaming process embodiment of retractable mold structure" 1 》

Please refer to FIG. 6, which is the foaming process further provided by the new type corresponding to the aforementioned several embodiments of the expandable foaming mold structure 10, the steps include: Step 1: After the upper cover 11 and the bottom cover 13 of the telescopic mold structure 10 are covered, the telescopic mold structure 10 is made to form the accommodating space 12, and the foam material F is added to the telescopic mold structure 10 In the accommodating space 12, there is a telescopic structure between the upper cover 11 and the bottom cover 13, so that the range of the accommodating space 12 can be adjusted; Step 2: Apply a heating means to the upper cover 11 and the bottom cover 11, and adjust the range of the accommodating space 12 through the retractable structure in the process; and Step 3: The heating means forms the foam material F into a molded body.

The aforementioned heating means includes electromagnetic heating, electric heating tube heating, infrared heating, hot air heating, high-frequency radiation heating, hot oil heating, hot water heating, or thermal heating.

"Stretchable Mould Structure Materials"

Corresponding to the aforementioned retractable mold structure 10 and its foaming process, the material of the retractable mold structure 10 of the present invention includes the upper cover 11, the middle cover 14 (the middle cover assembly 141) and the bottom cover 13, according to the aforementioned The different heating means can include but not limited to plastic, rubber, silicone, metal, glass or ceramic materials. For example, if a microwave electromagnetic heating method is used, the upper cover 11 and the middle cover 14 are preferably made of plastic, rubber, or silicon that can penetrate microwaves, and the bottom cover 13 is selected from metal, glass or ceramic. If the upper cover 11 and the bottom cover 13 of the retractable mold structure 10 of the present invention are in consideration of the mold clamping rotatability of the retractable mold structure embodiment 1 and the heat dissipation and thermal conductivity of the foam material F, the middle cover 14 and the bottom cover 13 The middle cover assembly 141 can be a multi-piece structure such as plastic, glass or ceramic.

The upper cover 11 and the bottom cover 13 of the retractable mold structure 10 can be formed by CNC processing, laser processing, casting, stamping, sand-turning, flipping, rapid prototyping, hot pressing, injection molding or 3D Prepared by processing methods such as printing and molding.

"foaming material"

The foaming material F can be basically divided into three states when introduced into the retractable mold structure 10. One is the state without foaming before being added to the retractable mold structure 10, and the other is the state when it enters the retractable mold structure 10. The third is the state that has not been fully foamed or micro-foamed before entering the retractable mold structure 10. The so-called non-foamed state means that the foaming material F is not foamed in the kneading step before the microwave electromagnetic foaming process; but it is not completely foamed or the foaming material F is foaming through the microwave electromagnetic Foaming has occurred in the mixing step before the process, but the foaming is not complete (micro-foaming), for example, the foaming agent is not completely reacted or two or more high and low temperature foaming agents are added. This foaming material F can be small particles The state of the micro-foamed body is present; while the foamed material F is foamed before passing through the foaming process provided by the present invention. For example, the high-pressure fluid is used as a physical foaming agent and is extruded through continuous melting Granulation/board, high-pressure fluid impregnation, dissolution balance, primary heating foaming, secondary heating foaming, pressure treatment and other technologies to produce foamed material F. For example, it may be foamed by supercritical fluid foaming. Beads, or foamed thermoplastic polyurethane (E-TPU), and the shape can preferably be beads, plates, strips, stars or other irregular shapes.

Further, the foaming material F can preferably be additionally added with water or contain water, which can cause the foaming material F to generate water vapor pressure in the retractable mold structure 10 of the present invention when the foaming material F is subsequently heated. Contribute to the efficiency and quality of thermoforming

The molded body processed by the new foam molding process can be divided into a continuous foam structure, a discontinuous foam structure or even a composite structure of multiple materials: the so-called continuous foam structure refers to the non-foamed structure. The foaming material F is added to the retractable mold structure 10 for foaming, and the resulting foamed body has a continuous structure between the foamed bodies; the so-called discontinuous foaming structure refers to the use of the aforementioned incomplete foaming/micro-foaming The foam and the fully foamed foam material F are formed by using the foam molding process provided by the present invention to complete the molded body, so that the incompletely foamed foam material F can be foamed again or the foamed material F The foamed material F is bonded to each other to obtain the molded body, but the foamed structures of the molded body are mainly bonded together, not a continuous foamed structure; and the so-called composite structure of multiple materials refers to the introduction of a variety of different foamed structures For the foam material F, the molded body with a combination of multiple materials is obtained through the foaming process of the present invention.

The molded body made of the foam material of the present invention can be of any shape and any field category, such as sheets, plates or other irregularly shaped packaging materials, cushioning materials or shoe materials, such as floor mats, smart Combine and hold containers, shoe midsoles or mattresses, etc. Especially for applications such as floor mats, clever stitching, etc., through the selection of the composite structure of the aforementioned multiple materials, the upper surface of the foam material F can be decorated with floor-like materials such as cloth, wood grain, stone, etc., to increase the molded body The diversity, beauty and quality of products.

The above descriptions are only the preferred embodiments of the present model, and are not intended to limit the scope of rights claimed by the present model. All other equivalent changes or modifications completed without departing from the spirit disclosed in the present model shall be included in the present model Within the scope of patent application.

10: Telescopic mold structure 11: Upper cover 111: Upper cover threaded surface 12: Housing space 13: bottom cover 141: Middle cover assembly 14: Middle cover 131: Bottom cover threaded surface 21: Scalable block F: Foam material I: input channel O: output channel

Fig. 1 is a schematic diagram of a first preferred embodiment of a new type of retractable mold structure. 2A to 2C are schematic diagrams of a preferred embodiment of a new type of retractable mold structure with delivery and output pipes. Figure 3 is a schematic diagram of a second preferred embodiment of the novel retractable mold structure. Fig. 4 is a schematic diagram of a third preferred embodiment of the novel retractable mold structure. Figure 5 is a schematic diagram of a fourth preferred embodiment of the novel retractable mold structure. Fig. 6 is a flow chart of the first preferred embodiment of the foaming process of the novel retractable mold structure.

10: Telescopic mold structure

11: Upper cover

111: Upper cover threaded surface

12: Housing space

13: bottom cover

Claims (8)

A retractable mold structure, comprising: an upper cover and a bottom cover, the upper cover covers the bottom cover and forms an accommodating space with a concave portion of the bottom cover; and There is a telescopic structure between the upper cover and the bottom cover, so that the range of the accommodating space can be adjusted. For example, the retractable mold structure of the first item of the scope of patent application, wherein: the retractable structure is that the inner or outer surface of the upper cover is provided with an upper cover threaded surface, and the inner or outer surface of the bottom cover is provided with a threaded surface on the upper cover It can be combined with a threaded surface of the bottom cover. For example, the retractable mold structure of the first item in the scope of patent application, wherein: the retractable structure is that the upper cover is provided with a retractable block that can be pressed down and rebounded. For example, the retractable mold structure of item 1, 2 or 3 in the scope of patent application, wherein: a middle cover is included between the upper cover and the bottom cover. For example, the retractable mold structure of item 4 in the scope of patent application, wherein: the middle cover is a plurality of pieces. For example, the retractable mold structure of item 1, 2 or 3 in the scope of patent application, wherein: the bottom cover is provided with a cooling device or a heating device. For example, the retractable mold structure of item 1, 2 or 3 in the scope of patent application, wherein: the material of the upper cover and the bottom cover is plastic, rubber, silicone, metal, glass or ceramic. For example, the retractable mold structure of item 1, 2, or 3 in the scope of the patent application, wherein: the retractable mold structure includes an input channel and an output channel.

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