Molding process of hot-press-resistant printing ink vamp and plastic molding equipment of hot-press-resistant printing ink vamp

Abstract

The invention relates to the field of vamp production, in particular to a forming process of a hot-press-resistant ink vamp, which comprises the following steps: S1, preparing water-based ink; s2, water-based ink heating treatment; s3, coloring the vamp; s4, the vamp is baked; s5, molding and mounting the decorative part; s6, blowing and cooling; the technical problems that coloring is not firm in the production process of existing hot-press-resistant ink vamps, and meanwhile, vamp decorating parts need to be additionally arranged in multiple procedures are solved. Meanwhile, the invention provides plastic forming equipment applied to the forming process.

Description

Technical Field

[0001] The invention relates to the field of shoe upper production, in particular to a molding process of a heat-pressure-resistant ink shoe upper and plastic molding equipment thereof. Background Art

[0002] Water-based ink, abbreviated as water-based ink, flexographic water-based ink is also called liquid ink, which is a uniform paste composed of binders, pigments, additives and other substances. It is mainly made of water-soluble resins, organic pigments, solvents and related additives through composite grinding. Water-based ink is particularly suitable for packaging and printing products with strict hygiene requirements such as tobacco, alcohol, food, beverages, medicines, and children's toys. Water-based ink is a uniform paste composed of binders, pigments, additives and other substances. Water-based ink is a uniform paste composed of binders, pigments, additives and other substances. The binder provides the necessary transfer properties for the ink, and the pigment gives the ink its color. The binder of water-based ink is mainly divided into two types, water-dilutable and water-dispersible.

[0003] Existing water-based inks are also used on shoe uppers. Coloring the uppers with water-based inks can ensure that the colors of the uppers are more vivid and three-dimensional. The colored uppers are formed into patterns and fixed with surface decorative plastic parts through hot pressing.

[0004] The invention patent with Chinese patent application number 202410651394.0 discloses that the present invention belongs to the field of fabric technology, and in particular, it relates to a foaming ink fabric with invisible logo, including a main body layer, an intermediate layer and an offset layer, the offset layer is located above the main body layer, at least a part of the offset layer is connected to the intermediate layer, the offset layer includes a pattern area and an ink area, the offset area is composed of a plurality of rubber strips, the offset area includes a breathable part and a foaming part, the foaming area is provided with a plurality of breathable holes, and the main body layer is woven with a first yarn and a second yarn. The technical solution proposed by the above invention mainly solves the problem that the color expression of traditional woven fabrics is easy to be limited by the color of the yarn used, and the pattern design is relatively simple, which cannot meet the printing requirements of complex patterns. In actual production applications, when the ink-dyed upper needs to be colored and patterned, and the decorative parts are integrally formed, the technical solution proposed by the above invention is obviously impossible to achieve. Summary of the invention

[0005] Therefore, in order to solve the above problems, the present invention proposes a molding process of heat-pressure resistant ink shoe uppers and plastic molding equipment thereof, which solves the technical problems that the coloring of the existing heat-pressure resistant ink shoe uppers is not firm and the shoe upper decorative parts need to be added in multiple processes during the production process.

[0006] To achieve the above object, the present invention adopts the following technical solution: a molding process of a heat-pressure resistant ink upper, comprising the following steps: S1. Preparation of water-based ink: Mix and stir the raw materials, wherein the raw materials include the following raw materials expressed in parts by weight: 10-12 parts of acrylate polymer, 25-35 parts of epoxy resin modified polyurethane, 12-15 parts of pigment, and 10 parts of additives, wherein the additives include water and ethanol, and the concentration of the additives is 5%; S2, heating the water-based ink; transferring the mixed water-based ink in step S1 to a heating device for heating, the heating process is heated from room temperature to 80 degrees Celsius, adding a water-based curing agent during the heating process, and continuing to stir and mix to maintain a constant temperature; S3, coloring the upper: immersing the upper material into the mixed water-based ink for coloring; S4, upper baking; the colored upper is transferred to a drying room for high-temperature baking at a temperature of 80 degrees Celsius to 120 degrees Celsius for 48 hours, and is naturally cooled to room temperature after baking; S5, molding and installation of decorative parts: molding the decorative parts on the surface of the upper by a plastic molding device and directly hot pressing them on the surface of the upper, and performing initial cooling after molding; S6, air cooling: the entire shoe upper after the decorative parts are installed is cooled for a second time by a cooling fan.

[0007] Furthermore, the water-based curing agent is prepared by mixing methyl methacrylate, butyl acrylate, hydroxyethyl acrylate, tert-butyl glycidyl carbonate and water in a ratio of 0.1:0.1:0.2:0.3:1.

[0008] Furthermore, in step S4, the shoelace holes are positioned and punched during the natural cooling process after baking.

[0009] Furthermore, in step S5 , the molding of the decorative component and the installation of the decorative component are performed simultaneously.

[0010] A plastic molding device is used in the molding process of heat-pressure-resistant ink shoe uppers. The plastic molding device includes a support base, a support stand arranged on the support base, a molding bottom mold and a molding top mold arranged on the support stand. The molding bottom mold is fixedly arranged at the bottom of the support stand, and the molding top mold is movably arranged on the support stand. It can be raised and lowered up and down in the vertical direction on the support stand, approaching or moving away from the molding bottom mold. A accommodating groove for placing the shoe upper is arranged on a side surface of the molding bottom mold close to the molding top mold, and a plastic feeding device and an auxiliary demolding device for facilitating demolding are arranged on the molding top mold.

[0011] Furthermore, a first negative pressure air hole is provided in the containing tank, and the first negative pressure air hole is connected to a first negative pressure fan, and a negative pressure airflow is generated by the first negative pressure fan to form a negative pressure environment in the containing tank.

[0012] Furthermore, a plurality of decorative part molding grooves are arranged on a side surface of the molding top mold close to the molding bottom mold, and the plastic feeding device is integrated on the molding top mold. The plastic feeding device includes a storage cavity, a raw material flow channel, and a heating mechanism. The storage cavity is provided with a feed port and a discharge port, and a molding port is arranged in the decorative part molding groove. The raw material flow channel connects the discharge port and the molding port, and the molding port is provided with a switch valve for controlling the flow of raw materials.

[0013] Furthermore, the heating mechanism includes a first heating plate arranged on the inner peripheral wall of the storage cavity and a second heating plate arranged on the inner circumferential side wall of the raw material flow channel.

[0014] Furthermore, the auxiliary demolding device is integrated in the forming top mold, and the auxiliary demolding device includes a working chamber, an eccentric balance wheel arranged in the working chamber, a connecting rod rotatably connected to the eccentric balance wheel, a pull-out rod rotatably connected to the connecting rod, and an air outlet channel, the air outlet channel is arranged in the working chamber and extends into the decorative component forming groove, the pull-out rod is inserted in the air outlet channel, and a flexible arc-shaped push portion is arranged on the pull-out rod at its free end, through the flexible arc-shaped push portion, the pull-out rod does not affect the airflow in the air outlet channel when moving toward the working chamber, and the pull-out rod generates a push airflow when moving toward the decorative component forming groove.

[0015] Furthermore, a counterweight is provided on the eccentric balance wheel, and the eccentric balance wheel is driven to rotate by a rotary motor.

[0016] By adopting the above technical solution, the beneficial effects of the present invention are: 1. Compared with the existing production process of special uppers such as ink uppers, the present invention can achieve higher coloring efficiency and brighter and firmer colors. At the same time, during the coloring process of the upper, the decorative parts on the upper can be directly formed by plastic parts molding equipment, thereby improving work efficiency. Specifically, the present invention further processes the water-based ink, that is, the water-based ink is heated in step S2, and a water-based curing agent is added during the heating process. The internal activity of the water-based ink after the heating treatment is higher, which indirectly improves the subsequent dyeing efficiency. The water-based curing agent is added because the water-based curing agent is a very important component in the water-based epoxy system, and its composition and structure directly affect the physical and chemical properties of the ink. By adding the water-based curing agent when the water-based ink is heated, the texture of the upper itself can be hardened when the water-based ink is used to color the upper, giving it hardness, The shoe upper has a wear-resistant effect and its service life is improved. Meanwhile, in step S5 of the process flow of the present invention, the colored shoe upper is baked. The baking process can improve the drying efficiency of the shoe upper surface on the one hand, and on the other hand, it is to ensure that the aqueous ink mixed with the aqueous curing agent will not separate due to the temperature reduction, thereby ensuring that the aqueous ink and the aqueous curing agent mixture can always maintain a uniform and stable texture to adhere to and dye the shoe upper. This step can also ensure that the color of the dyed shoe upper is uniform. The present invention directly adds plastic decorative parts to the shoe upper during the dyeing process. Unlike conventional plastic decorative parts that are pre-formed and then physically installed, the plastic decorative parts in the present invention are directly adhered to the shoe upper by hot-melt after being formed by plastic molding equipment. On the one hand, the integrity is stronger, and on the other hand, the hot-melt method is used to avoid the plastic decorative parts on the shoe upper from falling off during use.

[0017] 2. In the step S4 of the present invention, during the baking of the upper, the ventilation holes and shoelace holes are punched on the upper. The punching operation is carried out during the natural cooling process. Mechanical positioning punching or manual positioning punching can be used. When the punching work is carried out, the upper is still in a high temperature state, which can provide assistance for the punching operation. As the upper cools naturally with room temperature, the punching operation is also completed. In this process, there is no need to add additional heating equipment or cooling equipment, thereby reducing energy consumption.

[0018] 3. The present invention adopts a matching plastic molding device for the molding and installation of plastic decorative parts. The device is developed according to the molding process of the present invention and can achieve hot molding and hot pressing installation of plastic decorative parts. At the same time, it ensures that the installation process of the plastic decorative parts after molding is convenient and quick without adhesion. Specifically, an auxiliary demolding device is added to the plastic molding device, wherein the mechanism used for molding plastic decorative parts in the plastic molding device is a molding top mold and a molding bottom mold, wherein the plastic feeding device of the mold is directly integrated on the molding top mold, with stronger integrity. During use, the storage cavity in the plastic feeding device directly feeds the decorative part molding groove, and when the molding top mold and the molding bottom mold cooperate with each other, the decorative part molding groove will fit on the shoe upper, which ensures that the shoe upper is directly used as the bottom plate of the decorative part molding groove, so that the molding and installation of the plastic decorative parts are carried out simultaneously.

[0019] 4. In the present invention, an auxiliary demoulding device is arranged in the molding top mold. The working scenario of the auxiliary demoulding device is that after the plastic feeding device completes unloading on the shoe upper, the eccentric balance wheel is driven to rotate by a rotating motor. During its rotation, it will generate vibration due to its own eccentricity. The vibration will be transmitted to the entire molding top mold, so that the molding top mold after the plastic decorative parts are unloaded will vibrate, and the vibration is beneficial to the demoulding operation of the plastic decorative parts.

[0020] 5. At the same time, the eccentric balance wheel in the present invention is rotatably connected to a connecting rod, and the connecting rod is rotatably connected to a pull-out rod, the pull-out rod is placed in an air outlet channel, and the air outlet channel is connected to a molding groove of a decorative part. The pull-out rod reciprocates in the air outlet channel along with the swing of the eccentric balance wheel, and a flexible arc-shaped push portion is provided at the free end of the pull-out rod. Through the action of the flexible arc-shaped push portion, the air outlet channel continuously generates an outward airflow, and the airflow further improves the demoulding efficiency of the plastic decorative part and avoids the occurrence of adhesion.

[0021] 6. In the present invention, a counterweight is provided on the eccentric balance wheel, mainly to increase the degree of vibration generated when the balance wheel performs eccentric swing, thereby improving the vibration efficiency and optimizing the demoulding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings: Figure 1 It is a process flow chart of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the plastic molding equipment of the present invention; Figure 3 This is a schematic diagram of the front structure of the plastic molding equipment of the present invention; Figure 4 It is a schematic diagram of the internal structure of the plastic molding equipment of the present invention; Figure 5 for Figure 4 Enlarged view of point A in the middle; Figure 6 for Figure 4 Enlarged view of point B in the middle; Figure 7 It is a schematic diagram of the structure of the auxiliary demoulding device in the present invention. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0024] See also Figure 1-Figure 7 The present invention provides a molding process for a heat-pressure resistant ink shoe upper, comprising the following steps: S1. Preparation of water-based ink: Mix and stir the raw materials, wherein the raw materials include the following raw materials expressed in parts by weight: 10 parts of acrylate polymer, 25 parts of epoxy resin modified polyurethane, 12 parts of pigment, and 10 parts of additives, wherein the additives include water and ethanol, and the concentration of the additives is 5%; S2, heating the water-based ink; transferring the mixed water-based ink in step S1 to a heating device for heating, the heating process is heated from room temperature to 80 degrees Celsius, adding a water-based curing agent during the heating process, and continuing to stir and mix to maintain a constant temperature; S3, coloring the upper: immersing the upper material into the mixed water-based ink for coloring; S4, upper baking; the colored upper is transferred to a drying room for high-temperature baking at 80 degrees Celsius for 48 hours, and then naturally cooled to room temperature after baking; S5, molding and installation of decorative parts: molding the decorative parts on the surface of the upper by a plastic molding device and directly hot pressing them on the surface of the upper, and performing initial cooling after molding; S6, air cooling: the entire shoe upper after the decorative parts are installed is cooled for a second time by a cooling fan.

[0025] Wherein, the water-based curing agent is mixed with methyl methacrylate, butyl acrylate, hydroxyethyl acrylate, tert-butyl glycidyl carbonate and water in a ratio of 0.1:0.1:0.2:0.3:1; and, in step S4, the positioning and knocking of the shoelace holes are carried out during the natural cooling process after baking is completed, and the decorative part molding and decorative part installation in step S5 are carried out simultaneously.

[0026] The present embodiment simultaneously proposes equipment used in the above-mentioned molding process, a plastic molding equipment, which is used in the molding process of heat-pressure resistant ink shoe uppers, the plastic molding equipment comprising a support base 1, a support stand 2 arranged on the support base 1, a molding bottom mold 3 and a molding top mold 4 arranged on the support stand 2, the molding bottom mold 3 is fixedly arranged at the bottom of the support stand 2, the molding top mold 4 is movably arranged on the support stand 2, it can be lifted up and down in the vertical direction on the support stand 2, and is driven by a motor to approach or move away from the molding bottom mold 3. A receiving groove 31 for placing the shoe upper is arranged on a side surface of the molding bottom mold 3 close to the molding top mold 4, the molding top mold 4 is provided with a plastic feeding device and an auxiliary demolding device for facilitating demolding, and a first negative pressure air hole 32 is arranged in the receiving groove 31, the first negative pressure air hole 32 is connected to the first negative pressure fan 6, and the negative pressure air flow generated by the first negative pressure fan 6 forms a negative pressure environment in the receiving groove 31.

[0027] Six decorative part molding grooves 8 are arranged on one side surface of the molding top mold 4 close to the molding bottom mold 3. The plastic feeding device is integrated on the molding top mold 4. The plastic feeding device includes a storage chamber 51, a raw material flow channel 52, and a heating mechanism. The storage chamber 51 is provided with a feed port 54 and a discharge port 55. A molding port 56 is arranged in the decorative part molding groove 8. The raw material flow channel 52 connects the discharge port 55 and the molding port 56. The molding port 56 is provided with a switch valve 561 for controlling the flow of raw materials; the heating mechanism includes a first heating plate 53 arranged on the inner peripheral wall of the storage chamber 51 and a second heating plate 57 arranged on the inner circumferential side wall of the raw material flow channel 52; the first heating plate 53 and the second heating plate 57 are both electric heating plates, which are well-known structural parts and will not be described in detail here.

[0028] The auxiliary demoulding device is integrated in the molding top mold 4, and the auxiliary demoulding device includes a working chamber 7, an eccentric balance wheel 71 arranged in the working chamber 7, a connecting rod 73 rotatably connected to the eccentric balance wheel 71, a pull-out rod 74 rotatably connected to the connecting rod 73, and an air outlet channel 81. The air outlet channel 81 is arranged in the working chamber 7 and extends into the decorative component molding groove 8. The pull-out rod 74 is inserted into the air outlet channel 81. A flexible arc-shaped push portion 75 is arranged at the free end of the pull-out rod 74. Through the flexible arc-shaped push portion 75, the pull-out rod 74 does not affect the airflow in the air outlet channel 81 when moving toward the working chamber 7, and the pull-out rod 74 generates a push airflow when moving toward the decorative component molding groove 8.

[0029] The eccentric balance wheel 71 is provided with a counterweight block 72. The eccentric balance wheel 71 is driven to rotate by a rotary motor. The rotation method thereof is well known and will not be described in detail herein.

[0030] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0031] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A molding process for a heat-resistant ink upper, characterized in that: The following steps are involved: S1. Preparation of water-based ink: Mix and stir the raw materials, wherein the raw materials include the following raw materials expressed in parts by weight: 10-12 parts of acrylate polymer, 25-35 parts of epoxy resin modified polyurethane, 12-15 parts of pigment, and 10 parts of additives, wherein the additives include water and ethanol, and the concentration of the additives is 5%; S2, heating the water-based ink; transferring the mixed water-based ink in step S1 to a heating device for heating, the heating process is heated from room temperature to 80 degrees Celsius, adding a water-based curing agent during the heating process, and continuing to stir and mix to maintain a constant temperature; S3, coloring the upper: immersing the upper material into the mixed water-based ink for dyeing; S4, upper baking; the colored upper is transferred to a drying room for high-temperature baking at a temperature of 80 degrees Celsius to 120 degrees Celsius for 48 hours, and is naturally cooled to room temperature after baking; S5, molding and installation of decorative parts: molding the decorative parts on the surface of the upper by a plastic molding device and directly hot pressing them on the surface of the upper, and performing initial cooling after molding; S6, air cooling: the entire shoe upper after the decorative parts are installed is cooled for a second time by a cooling fan.

2. The molding process of the heat-pressure resistant ink shoe upper according to claim 1, characterized in that: The water-based curing agent is prepared by mixing methyl methacrylate, butyl acrylate, hydroxyethyl acrylate, tert-butyl glycidyl carbonate and water in a ratio of 0.1:0.1:0.2:0.3:

1.

3. The molding process of the heat-pressure resistant ink shoe upper according to claim 2, characterized in that: In step S4, the shoelace holes are positioned and punched during natural cooling after baking.

4. The molding process of the heat-pressure resistant ink shoe upper according to claim 3, characterized in that: In step S5, the molding of the decorative component and the installation of the decorative component are performed simultaneously.

5. A plastic molding device, used in the molding process of the heat-pressure resistant ink shoe upper as claimed in claim 4, characterized in that: The plastic molding equipment includes a supporting base, a supporting stand arranged on the supporting base, a molding bottom mold and a molding top mold arranged on the supporting stand, the molding bottom mold is fixedly arranged at the bottom of the supporting stand, the molding top mold is movably arranged on the supporting stand, and can be raised and lowered up and down in a vertical direction on the supporting stand, approaching or moving away from the molding bottom mold, a side surface of the molding bottom mold close to the molding top mold is provided with a receiving groove for placing the shoe upper, and the molding top mold is provided with a plastic feeding device and an auxiliary demolding device for facilitating demolding.

6. A plastic molding device according to claim 5, characterized in that: A first negative pressure air hole is arranged in the containing tank, and the first negative pressure air hole is connected to a first negative pressure fan. The first negative pressure fan generates a negative pressure airflow to form a negative pressure environment in the containing tank.

7. A plastic molding device according to claim 6, characterized in that: A plurality of decorative part molding grooves are arranged on a side surface of the molding top mold close to the molding bottom mold. The plastic feeding device is integrated on the molding top mold. The plastic feeding device includes a storage cavity, a raw material flow channel, and a heating mechanism. The storage cavity is provided with a feed port and a discharge port. A molding port is arranged in the decorative part molding groove. The raw material flow channel connects the discharge port and the molding port. A switch valve for controlling the flow of raw materials is arranged on the molding port.

8. A plastic molding device according to claim 7, characterized in that: The heating mechanism comprises a first heating plate arranged on the inner peripheral wall of the material storage cavity and a second heating plate arranged on the inner peripheral side wall of the raw material flow channel.

9. A plastic molding device according to claim 8, characterized in that: The auxiliary demoulding device is integrated in the forming top mold, and the auxiliary demoulding device includes a working chamber, an eccentric balance wheel arranged in the working chamber, a connecting rod rotatably connected to the eccentric balance wheel, a pull-out rod rotatably connected to the connecting rod, and an air outlet channel. The air outlet channel is arranged in the working chamber and extends into the decorative component forming groove. The pull-out rod is inserted into the air outlet channel. A flexible arc-shaped push portion is arranged on the pull-out rod at its free end. Through the flexible arc-shaped push portion, the pull-out rod does not affect the airflow in the air outlet channel when moving toward the working chamber, and the pull-out rod generates a push airflow when moving toward the decorative component forming groove.

10. A plastic molding device according to claim 9, characterized in that: The eccentric balance wheel is provided with a counterweight block, and the eccentric balance wheel is driven to rotate by a rotary motor.

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