Production method of dual-density and dual-hardness middle pad
By adopting the dual-density and double-hardness EVA mid-mat production method, the existing mid-mat design is solved, and a healthier and more comfortable wearing experience is achieved.
Patent Information
- Application Number
- CN202510006887.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-03
- Publication Date
- 2025-02-11
AI Technical Summary
The hard and soft designs of existing sandal mid-mats have their own shortcomings. The hard mid-mats are uncomfortable, and the soft mid-mats lack support, which affects human health and comfort.
The production method of EVA medium pad with double density and double hardness is adopted. The outer peripheral is hard and the inner layer is soft. By sticking the medium density EVA and high density EVA together and forming it in a hot press, the outer peripheral is hard and the inner layer is soft. Medium pad.
It achieves the comfort and support of the middle mat when wearing it, conforms to human mechanics, protects the feet, wears healthier, more comfortable and reduces fatigue.
Smart Images
Figure CN119408183A_ABST
Abstract
Description
Technical Field
[0001] The invention specifically relates to the technical field of middle pads, and in particular to a production method of a dual-density and dual-hardness middle pad. Background Art
[0002] The midsole is also called the insole. It is a part placed on the upper part of the sole and in direct contact with the foot. Its main functions include providing cushioning to reduce the impact force on the foot when walking or exercising; increasing the comfort of the foot and making the shoe fit the foot better; absorbing foot sweat to keep the foot dry; correcting the foot posture (some insoles have correction functions), etc. For example, in sports shoes, the midsole can effectively cushion the reaction force of the ground on the foot during strenuous exercise such as running and jumping, reducing the risk of injury.
[0003] Taking sandals as an example, existing sandal midsoles include hard midsoles and soft midsoles. The hard midsoles are harder and not easy to bend when worn, making the soles of the feet stiff and very uncomfortable; the soft midsoles are very soft and feel soft when worn, lacking sufficient support, which is not good for human health. Summary of the invention
[0004] The purpose of the present invention is to provide a method for producing a mid-pad with double density and double hardness, with hard outer periphery and soft inner layer. The hard outer periphery is to provide sufficient support force for the mid-pad when the mid-pad is wrapped with leather, to ensure that the mid-pad will not be deformed during the leather wrapping process, and at the same time, the periphery of the mid-pad has an edge effect, making the appearance of the shoe more delicate and beautiful; the inner layer of the mid-pad is soft and has a rebound effect, so that people feel more comfortable and pleasant when wearing shoes, and will not feel uncomfortable or tired even if they wear them for a long time. In order to solve the technical problems raised in the above background technology.
[0005] To achieve the above object, the present invention provides the following technical solutions: A method for producing a dual-density and dual-hardness mid-pad comprises the following steps: Step 1: Paste two EVA sheets of different density and hardness together; Step 2: Cut the bonded EVA pad into a rectangular shape that can be hot-pressed into two middle pads at the same time; Step 3: Place the cut double-layer EVA into a hot press for hot pressing to form a double-density, double-hardness mid-pad.
[0006] As a further technical solution of the present invention, the two EVAs in step 1 are medium-density EVA and high-density EVA, respectively; wherein the medium-density EVA is located on the high-density EVA.
[0007] As a further technical solution of the present invention, after the two layers of EVA sponge in step 3 are hot pressed, the density of the upper layer of EVA is 0.15g / cm³-0.25g / cm³, and the hardness is 35 degrees-50 degrees; the density of the lower layer of EVA is 0.25g / cm³-0.4g / cm³, and the hardness is 65 degrees-80 degrees.
[0008] As a further technical solution of the present invention, the hot press in step 3 includes a chassis body, a plurality of pillars are arranged on the top of the chassis body, and a top plate is fixed on the top of the pillars; a heating upper mold is fixed on the bottom of the top plate; a movable lower mold that can be raised and lowered is installed on the bottom of the heating upper mold; a loading assembly is also provided on one side of the movable lower mold.
[0009] As a further technical solution of the present invention, the loading assembly includes a base fixed on the chassis; the base is connected to a fixing frame via a fixing column; the fixing frame is arranged in a rectangular frame shape, and two slide rails are fixed on the top of the fixing frame; each slide rail is slidably connected to a slide seat; a loading slide is fixed on the top of the two slide seats.
[0010] As a further technical solution of the present invention, the loading slide has a U-shaped opening at one end and an L-shaped slide is fixed at the other end; the lower end of the L-shaped slide is fixed to the sliding block; the sliding block is slidably connected to the guide rod; the guide rod is fixed to the U-shaped seat, wherein the U-shaped seat is fixed to the base through a fixing column; a compression spring is provided between the sliding block and the U-shaped seat, and the compression spring is sleeved on the guide rod.
[0011] As a further technical solution of the present invention, the lower end of the L-shaped slide is also equipped with a tension spring, one end of which is connected to a traction rope; the traction rope is fixed to the second fixed guide wheel after passing through the first fixed guide wheel and the fixed shaft; the first fixed guide wheel is fixed to the U-shaped seat; the second fixed guide wheel is fixed to the base; the fixed shaft is fixed to the top of the cylinder rod; the cylinder rod is also fixed to the movable lower mold.
[0012] As a further technical solution of the present invention, a controller is further provided on one side of the chassis; the controller is fixed on the outside of a side frame, and the side frame is fixed to the chassis.
[0013] Compared with the prior art, the present invention has the following beneficial effects: The present invention changes the common method of the middle pad to the method of supporting the arch of the foot. The middle pad of the arch of the foot can fully support all parts of the sole of the foot, conform to human mechanics, have a certain protective effect on the human foot, and is healthier and more comfortable to wear. Even if you walk for a long time, you will not feel tired; The present invention adopts EVA dual-density and dual-hardness design in the middle pad; the outer periphery is hard and the inner layer is soft. The outer periphery is hard in order to provide sufficient support force for the middle pad when the middle pad is wrapped with leather, to ensure that the middle pad will not be deformed during the leather wrapping process, and at the same time, the periphery of the middle pad has an edge effect, making the appearance of the shoe more delicate and beautiful; The inner layer of the midsole is soft and has a rebound effect, so that people can feel more comfortable and pleasant when wearing the shoes, and will not feel uncomfortable or tired even if they wear them for a long time. According to the present invention, after the middle pad is hot-pressed, the cylinder rod retracts, and the hot-pressed middle pad is still in a connected state with the outer sponge pad, and when the movable lower mold is lower than the U-shaped opening of the loading slide, the middle pad connected with the sponge pad will fall on the loading slide; as the cylinder rod continues to retract, the compression spring causes the sliding block to drive the L-shaped slide to slide outward along the guide rod according to its own elasticity, and at this time, the loading slide supports the sponge pad to slide outward, so that the staff can take out the sponge pad without contacting the heated upper mold and the movable lower mold, effectively avoiding the occurrence of scalding. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.
[0015] Figure 2 The present invention Figure 1 Left view of .
[0016] Figure 3 The present invention Figure 1 main view.
[0017] Figure 4 The present invention Figure 3 AA section view.
[0018] Figure 5 The present invention Figure 1 Schematic diagram from another perspective.
[0019] Figure 6 The present invention Figure 1 An enlarged schematic diagram of point B.
[0020] Figure 7 The present invention Figure 4 Enlarged schematic diagram of point C.
[0021] Figure 8 The present invention Figure 5 An enlarged schematic diagram of point D.
[0022] In the figure: 1-chassis, 2-pillar, 3-top plate, 4-heating upper mold, 5-movable lower mold, 6-loading assembly, 7-side frame, 8-controller; 61-fixed frame, 62-slide rail, 63-slide seat, 64-feeding slide, 65-L-type slide, 66-guide rod, 67-slide block, 68-compression spring, 69-U-type seat, 610-tension spring, 611-first fixed guide wheel, 612-traction rope, 613-second fixed guide wheel, 614-cylinder, 615-fixed shaft, 616-base. DETAILED DESCRIPTION
[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0024] See also Figures 1 to 8 In an embodiment of the present invention, a method for producing a dual-density and dual-hardness mid-pad comprises the following steps: Step 1: Paste two EVA sheets of different density and hardness together; Step 2: Cut the bonded EVA pad into a rectangular shape that can be hot-pressed into two middle pads at the same time; Step 3: Put the EVA into a heat press for heat pressing to form the middle pad.
[0025] In this embodiment, the two types of EVA in step 1 are medium-density EVA and high-density EVA, respectively; wherein the medium-density EVA is located on the high-density EVA.
[0026] In this embodiment, after the two layers of EVA sponge in step 3 are hot-pressed, the density of the upper layer of EVA is 0.15g / cm³-0.25g / cm³, and the hardness is 35 degrees-50 degrees; the density of the lower layer of EVA is 0.25g / cm³-0.4g / cm³, and the hardness is 65 degrees-80 degrees.
[0027] By adopting the above technical solution, the middle pad is changed from the ordinary method to the arch support method. The arch middle pad can fully support all parts of the sole of the foot, conform to human body mechanics, have a certain protective effect on the human foot, and is healthier and more comfortable to wear, and will not feel tired even if you walk for a long time.
[0028] The midsole adopts EVA dual-density and dual-hardness design; the outer periphery is hard and the inner layer is soft. The outer periphery is hard to provide sufficient support for the midsole when the midsole is wrapped with leather, to ensure that the midsole will not deform during the leather wrapping process, and at the same time, the periphery of the midsole has an edge effect, making the appearance of the shoe more delicate and beautiful.
[0029] The inner layer of the midsole is soft and has a rebound effect, so that people feel more comfortable and pleasant when wearing shoes, and they will not feel uncomfortable or tired even if they wear them for a long time.
[0030] In this embodiment, the hot press in step 3 includes a chassis 1, on which a plurality of pillars 2 are provided, and a top plate 3 is fixed on the top of the pillars 2; a heating upper mold 4 is fixed at the bottom of the top plate 3; a movable lower mold 5 that can be raised and lowered is installed at the bottom of the heating upper mold 4; a loading assembly 6 is also provided on one side of the movable lower mold 5.
[0031] By adopting the above technical solution, when the center pad is hot-pressed, the movable lower mold 5 is raised and closed with the heated upper mold 4, thereby realizing hot-pressing molding of the sponge center pad.
[0032] In this embodiment, the loading assembly 6 includes a base 616 fixed on the chassis 1; the base 616 is connected to a fixing frame 61 through a fixing column; the fixing frame 61 is arranged in a rectangular frame shape, and two slide rails 62 are fixed on the top of the fixing frame 61; each slide rail 62 is slidably connected to a slide seat 63; a loading slide 64 is fixed on the top of the two slide seats 63.
[0033] The loading slide 64 has a U-shaped opening at one end and an L-shaped slide 65 is fixed at the other end; the lower end of the L-shaped slide 65 is fixed to the sliding block 67; the sliding block 67 is slidably connected to the guide rod 66; the guide rod 66 is fixed to the U-shaped seat 69, wherein the U-shaped seat 69 is fixed to the base 616 through a fixing column; a compression spring 68 is provided between the sliding block 67 and the U-shaped seat 69, and the compression spring 68 is sleeved on the guide rod 66.
[0034] To be more specific, a tension spring 610 is also installed at the lower end of the L-shaped slide 65, and one end of the tension spring 610 is connected to a traction rope 612; the traction rope 612 is fixed to the second fixed guide wheel 613 after passing through the first fixed guide wheel 611 and the fixed shaft 615; the first fixed guide wheel 611 is fixed to the U-shaped seat 69; the second fixed guide wheel 613 is fixed to the base 616; the fixed shaft 615 is fixed to the top of the cylinder rod of the cylinder 614; the cylinder rod of the cylinder 614 is also fixed to the movable lower mold 5.
[0035] By adopting the above technical scheme, when the sponge pad is hot-pressed, the cut sponge pad is first placed at the U-shaped opening at the inner end of the feeding slide 64, and the cylinder rod of the cylinder 614 is extended. While the mobile lower mold 5 is lifted, the fixed shaft 615 extends the traction rope 612 upward, and the traction rope 612 pulls the L-shaped slide 65 through the tension spring 610. The feeding slide 64 supports the sponge pad and slides inward along the slide rail 62 through the bottom slide seat 63; at the same time, the sliding block 67 compresses the compression spring 68, and when the sliding block 67 cannot move, the cylinder rod of the cylinder 614 continues to rise, and the tension spring 610 undergoes elastic deformation to ensure that the traction rope 612 can continue to extend upward; at this time, the mobile lower mold 5 lifts the sponge pad, and then the heating upper mold 4 and the mobile lower mold 5 are closed, thereby realizing the hot pressing molding of the centering pad; After the middle pad is hot-pressed, the cylinder rod of the cylinder 614 retracts, and the hot-pressed middle pad is still connected to the outer sponge pad. When the movable lower mold 5 is lower than the U-shaped mouth of the loading slide 64, the middle pad connected to the sponge pad will fall on the loading slide 64; as the cylinder rod of the cylinder 614 continues to retract, the compression spring 68 uses its own elasticity to make the sliding block 67 drive the L-shaped slide 65 to slide outward along the guide rod 66. At this time, the loading slide 64 supports the sponge pad to slide outward, so that the staff can take out the sponge pad without contacting the heated upper mold 4 and the movable lower mold 5, effectively avoiding the occurrence of burns.
[0036] In this embodiment, a controller 8 is further provided on one side of the chassis 1 ; the controller 8 is fixed on the outside of a side frame 7 , and the side frame 7 is fixed to the chassis 1 .
[0037] The working principle is: when hot pressing the sponge pad, first place the cut sponge pad on the U-shaped opening at the inner end of the feeding slide 64, the cylinder rod of the cylinder 614 extends, and while the mobile lower mold 5 is lifted, the fixed shaft 615 extends the traction rope 612 upward, and the traction rope 612 pulls the L-shaped slide 65 through the tension spring 610, and the feeding slide 64 holds the sponge pad and slides inward along the slide rail 62 through the bottom slide seat 63; at the same time, the sliding block 67 compresses the compression spring 68, and when the sliding block 67 cannot move, the cylinder rod of the cylinder 614 continues to rise, and the tension spring 610 undergoes elastic deformation to ensure that the traction rope 612 can continue to extend upward; at this time, the mobile lower mold 5 lifts the sponge pad, and then the heating upper mold 4 and the mobile lower mold 5 are closed, thereby realizing the hot pressing molding of the centering pad; After the middle pad is hot-pressed, the cylinder rod of the cylinder 614 retracts, and the hot-pressed middle pad is still connected to the outer sponge pad. When the movable lower mold 5 is lower than the U-shaped mouth of the loading slide 64, the middle pad connected to the sponge pad will fall on the loading slide 64; as the cylinder rod of the cylinder 614 continues to retract, the compression spring 68 uses its own elasticity to make the sliding block 67 drive the L-shaped slide 65 to slide outward along the guide rod 66. At this time, the loading slide 64 supports the sponge pad to slide outward, so that the staff can take out the sponge pad without contacting the heated upper mold 4 and the movable lower mold 5, effectively avoiding the occurrence of burns.
[0038] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.
[0039] 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 method for producing a dual-density and dual-hardness mid-pad, characterized in that: The following steps are involved: Step 1: Paste two EVA sheets of different density and hardness together; Step 2: Cut the bonded EVA into a cuboid shape; Step 3: Place the double-layer EVA into a heat press for heat pressing to form a middle pad.
2. The method for producing a dual-density and dual-hardness mid-pad according to claim 1, characterized in that: The two kinds of EVA in step 1 are medium-density EVA and high-density EVA, respectively; wherein the medium-density EVA is located on the high-density EVA.
3. The method for producing a dual-density and dual-hardness mid-pad according to claim 2, characterized in that: After the double-layer EVA in step 3 is hot-pressed, the density of the upper layer EVA is 0.15g / cm³-0.25g / cm³, and the hardness is 35 degrees-50 degrees; the density of the lower layer EVA is 0.25g / cm³-0.4g / cm³, and the hardness is 65 degrees-80 degrees.
4. The method for producing a dual-density and dual-hardness mid-pad according to any one of claims 1 to 3, characterized in that: The hot press in step 3 comprises a chassis (1), a plurality of pillars (2) are provided on the top of the chassis (1), a top plate (3) is fixed on the top of the pillars (2); a heating type upper mold (4) is fixed on the bottom of the top plate (3); a movable lower mold (5) that can be raised and lowered is installed on the bottom of the heating type upper mold (4); and a loading assembly (6) is also provided on one side of the movable lower mold (5).
5. The method for producing a dual-density and dual-hardness mid-pad according to claim 4, characterized in that: The loading assembly (6) comprises a base (616) fixed on the chassis (1); the base (616) is connected to a fixing frame (61) via a fixing column; the fixing frame (61) is arranged in a rectangular frame shape, and two slide rails (62) are fixed on the top of the fixing frame (61); each slide rail (62) is slidably connected to a slide seat (63); and a loading slide frame (64) is fixed on the top of the two slide seats (63).
6. The method for producing a dual-density and dual-hardness mid-pad according to claim 5, characterized in that: The loading slide (64) has a U-shaped opening at one end and an L-shaped slide (65) is fixed at the other end; the lower end of the L-shaped slide (65) is fixed to a sliding block (67); the sliding block (67) is slidably connected to the guide rod (66); the guide rod (66) is fixed to the U-shaped seat (69), wherein the U-shaped seat (69) is fixed to the base (616) through a fixing column; a compression spring (68) is provided between the sliding block (67) and the U-shaped seat (69), and the compression spring (68) is sleeved on the guide rod (66).
7. The method for producing a dual-density and dual-hardness mid-pad according to claim 6, characterized in that: The lower end of the L-shaped slide (65) is also equipped with a tension spring (610), one end of which is connected to a traction rope (612); the traction rope (612) is fixed to the second fixed guide wheel (613) after passing through the first fixed guide wheel (611) and the fixed shaft (615); the first fixed guide wheel (611) is fixed to the U-shaped seat (69); the second fixed guide wheel (613) is fixed to the base (616); the fixed shaft (615) is fixed to the top of the cylinder rod of the cylinder (614); the cylinder rod of the cylinder (614) is also fixed to the movable lower mold (5).
8. The method for producing a dual-density and dual-hardness mid-pad according to claim 4, characterized in that: A controller (8) is also provided on one side of the chassis (1); the controller (8) is fixed on the outside of a side frame (7), and the side frame (7) is fixed to the chassis (1).