One-piece molding process for safety shoes

Abstract

The present invention discloses an integral molding process for safety shoes. The integral molding equipment for safety shoes includes a support table, a sole mold, a cover mold, and a feeding mechanism. The support table has a frame. The sole mold is fixedly installed on the support table. The cover mold is connected to the frame through a movable mechanism. The movable mechanism is used to drive the cover mold to be buckled with the sole mold to form the sole. The cover mold has an opening through which the shoe upper can be inserted. The feeding mechanism is arranged on the frame and is used to send the shoe upper to be fixedly placed on the cover mold. The feeding mechanism includes side molds and a power assembly for driving the two groups of side molds to move horizontally and vertically as a whole respectively. After the two groups of side molds are spliced, a groove adapted to the bottom circle of the shoe upper can be formed. A plurality of suction ports are arranged on the inner wall of the groove. The plurality of suction ports can generate suction through an air source to suck and expand the shoe upper outwards. The present invention realizes the integral molding of the shoe upper and the sole, without the need to support the shoe upper through an external expanding mechanism. After molding, the cover mold and the sole mold are separated, and the safety shoes can be directly taken off, which is convenient to operate.

Description

Technical Field

[0001] The present invention relates to the technical field of safety shoe production, and specifically to an integral molding process for safety shoes. Background Art

[0002] Safety shoes are a general term for safety shoes and protective shoes, which can protect the feet from foreseeable injuries during the production processes in fields such as industry, construction, and agriculture, and are suitable for wearing during operations in various environments. When producing safety shoes, the sole is generally injection-molded directly onto the shoe upper, but it is necessary to set up and support the shoe upper in advance, which is rather troublesome to remove and is likely to expand and stretch the shoe entrance. Therefore, the present invention proposes an integral molding process for safety shoes that can solve the above problems. Summary of the Invention

[0003] The purpose of the present invention is to provide an integral molding process for safety shoes to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solution: An integral molding device for safety shoes, including:

[0005] A support table, which has a frame;

[0006] A sole mold, fixedly installed on the support table;

[0007] A cover mold, connected to the frame through a movable mechanism, the movable mechanism is used to drive the cover mold to be buckled with the sole mold to form a sole, and the cover mold has an opening through which the shoe upper can be inserted;

[0008] A feeding mechanism, arranged on the frame, used to send the shoe upper to be fixedly placed on the cover mold. The feeding mechanism includes side molds, and a power assembly for driving the two groups of side molds to move horizontally and vertically as a whole respectively. After the two groups of side molds are spliced, they can form a groove adapted to the bottom circle of the shoe upper. A plurality of suction ports are opened on the inner wall of the groove. Through the suction generated by a gas source, the shoe upper can be sucked and expanded outward, and then an elastic isolation pad can be inserted from the bottom circle of the shoe upper. The outer circle of the elastic isolation pad is wider than the bottom circle of the shoe upper to support the bottom circle of the shoe upper outward.

[0009] As a preferred technical solution of the present invention, a supporting edge is fixedly connected to the inner wall of each group of side molds for temporarily supporting the shoe upper.

[0010] As a preferred technical solution of the present invention, a plurality of vertical grooves are provided on the supporting edge, and a top pin is hermetically arranged in each vertical groove through a spring. An air duct is arranged in the side mold, and the gas source provides suction to a plurality of suction ports and a plurality of vertical grooves through the air duct.

[0011] As a preferred technical solution of the present invention, a plurality of inner protrusions are provided on the inner wall of the cover mold, and a plurality of outer protrusions are provided on the outer wall of the sole mold. When the cover mold and the sole mold are buckled, the inner protrusions and the outer protrusions are vertically staggered, and the raw material can be distributed between the outer protrusions and the inner protrusions after extrusion.

[0012] As a preferred technical solution of the present invention, the power assembly includes a first telescopic source installed on the frame and a cross frame connected to the movable end of the first telescopic source. A rotating gear, two sliding teeth and a power source are arranged on the cross frame. The power source is drivingly connected to the rotating gear. The two sliding teeth are respectively slidably connected to the cross frame and are meshed with the rotating gear on different sides of the rotating gear. The two sliding teeth are respectively connected to the two side molds through connecting rods in one-to-one correspondence.

[0013] As a preferred technical solution of the present invention, the movable mechanism includes a second telescopic source installed on the frame and at least one guide rod penetrating through the frame. The guide rod and the movable end of the second telescopic source both extend downward and are connected to the sole mold.

[0014] As a preferred technical solution of the present invention, an elastic ring is provided on the inner circle of the opening, and the width of the inner circle of the opening is smaller than the width of the bottom circle of the shoe upper.

[0015] The present invention also provides a one-piece molding process for safety shoes, which specifically includes the following steps:

[0016] S1. The power assembly drives the two side molds to be spliced to form a receiving groove. After the shoe upper is placed in the receiving groove, the bottom circle of the shoe upper can be sucked outwards and expanded by the suction generated by the air source and kept stable.

[0017] S2. An elastic isolation pad with an outer circle width larger than the bottom circle width of the shoe upper is inserted into the shoe upper to support the bottom circle of the shoe upper outwards.

[0018] S3. The power assembly drives the two side molds to move upwards as a whole, sends the expanded shoe upper to the cover mold, and clamps the shoe upper through the opening on the cover mold. Then, the power assembly drives the two side molds to separate laterally.

[0019] S4. The movable mechanism drives the cover mold to move downwards and buckle with the sole mold. The raw material is heat-formed into a sole by wrapping the bottom circle of the shoe upper and the elastic isolation pad in the molding cavity formed by the cover mold and the sole mold, realizing the one-piece molding of the shoe upper and the sole.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: The one-piece molding process for safety shoes of the present invention realizes the one-piece molding of the shoe upper and the sole, without the need to support the shoe upper by an external expansion mechanism. After molding, the cover mold and the sole mold can be separated, and the safety shoes can be directly taken off, which is convenient to operate.

[0021] When the power assembly drives the two groups of side molds to move upward integrally to send the shoe upper to the cover mold for fixed placement, after the two groups of side molds rise to the fixed height, the air source stops working, the suction force at the suction port disappears and no longer sucks the shoe upper, the suction force in the vertical groove disappears, and multiple ejector pins move upward in the vertical groove through the elastic force of the spring, smoothly pushing the shoe upper upward into the cover mold for fixed placement, avoiding the collision between the two groups of side molds and the mold cover during upward movement, so that there will be no deviation in the connection area between the shoe upper and the sole of the produced safety shoes, and the production quality is high. Brief Description of the Drawings

[0022] Figure 1 Schematic diagram of the overall structure of the present invention;

[0023] Figure 2 Schematic diagram of the structure of the cover mold of the present invention;

[0024] Figure 3 Schematic diagram of the splicing of the two groups of side molds of the present invention;

[0025] Figure 4 Cross-sectional view of the two groups of side molds of the present invention;

[0026] Figure 5 For Figure 4 Enlarged schematic view at A in

[0027] Figure 6 Schematic diagram of the connection relationship between the side mold and the cover mold and the frame of the present invention;

[0028] Figure 7 Schematic diagram of the structure of the power assembly of the present invention;

[0029] In the figure: 100, support table; 110, frame; 200, sole mold; 300, cover mold; 301, opening; 310, moving mechanism; 311, second telescopic source; 312, guide rod; 400, feeding mechanism; 410, side mold; 411, suction port; 412, bearing edge; 413, vertical groove; 414, ejector pin; 415, spring; 416, air duct; 420, receiving groove; 430, air source; 440, first telescopic source; 450, cross frame; 451, sliding tooth; 452, connecting rod; 460, power source; 461, rotating tooth. Detailed Description of the Embodiment

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] Embodiment 1

[0032] Please refer to Figure 1-7 , a one-piece forming device for safety shoes, including a support table 100, a sole mold 200, a cover mold 300 and a feeding mechanism 400. The support table 100 has a frame 110, and the frame 110 is stably connected to the support table 100 by welding.

[0033] Please refer to Figure 1 、 Figure 2 , the sole mold 200 is fixedly installed on the support table 100, the cover mold 300 is connected to the frame 110 through a movable mechanism 310, and the movable mechanism 310 is used to drive the cover mold 300 to be buckled with the sole mold 200 to form a sole. The cover mold 300 has an opening 301 through which the shoe upper can be inserted. The cover mold 300 and the sole mold 200 respectively have inner cavities, and heating wires are arranged in the inner cavities. The sole mold 200 is injected with raw materials through a filling machine. After the cover mold 300 and the sole mold 200 are buckled, a forming cavity is formed. By conducting heat to the raw materials, the raw materials are thermoformed into a sole with the designed shape of the sole mold 200. Preferably, a release agent can be sprayed on the cover mold 300 and the sole mold 200 in advance to facilitate demolding.

[0034] Please refer to Figure 1 、 Figure 3 , the feeding mechanism 400 is arranged on the frame 110 and is used to send the shoe upper to be fixedly placed on the cover mold 300. The feeding mechanism 400 includes side molds 410 and a power assembly for driving the two groups of side molds 410 to move horizontally and vertically as a whole respectively;

[0035] After the two groups of side molds 410 are spliced, a receiving groove 420 adapted to the bottom circle of the shoe upper can be formed. A plurality of suction ports 411 are arranged on the inner wall of the receiving groove 420. Through the suction generated by an air source 430, the shoe upper can be sucked outwards and stretched, and then an elastic isolation pad can be inserted from the bottom circle of the shoe upper. The outer circle of the elastic isolation pad is wider than the bottom circle of the shoe upper to support the bottom circle of the shoe upper outwards. The power assembly drives the two groups of side molds 410 to be spliced to form the receiving groove 420. In the receiving groove 420, the shoe upper can be sucked outwards and stretched by the suction generated by the air source 430 and kept stable. At this time, an elastic isolation pad with an outer circle width greater than the width of the bottom circle of the shoe upper is inserted into the shoe upper to support the bottom circle of the shoe upper outwards. After the bottom circle of the shoe upper is supported, the power assembly drives the two groups of side molds 410 to move upwards, and the supported shoe upper is sent to the cover mold 300. The shoe upper passes through the opening 301. An elastic ring is arranged on the inner circle of the opening 301. The width of the inner circle of the opening 301 is smaller than the width of the bottom circle of the shoe upper, which plays a clamping role on the shoe upper. The distance that the power assembly drives the two groups of side molds 410 to move upwards is a fixed value and can be adjusted according to different safety shoes produced.

[0036] During production, the power component drives two groups of side molds 410 to be spliced to form a receiving groove 420. After placing the shoe upper in the receiving groove 420, the air source 430 generates suction to suck and expand the bottom ring of the shoe upper outwards and keep it stable. Then, an elastic isolation pad with an outer ring width larger than the width of the bottom ring of the shoe upper is inserted into the shoe upper, pushing the bottom ring of the shoe upper outwards so that the bottom ring of the shoe upper will not bend inwards during molding. The power component drives the two groups of side molds 410 to move upwards as a whole, sending the expanded shoe upper to the cover mold 300. The opening 301 on the cover mold 300 clamps the shoe upper. The sole mold 200 injects raw materials through a feeder, and then the power component drives the two groups of side molds 410 to separate laterally. The moving mechanism 310 drives the cover mold 300 to move downwards to be buckled with the sole mold 200. The raw materials are thermoformed into a sole by wrapping the bottom ring of the shoe upper and the elastic isolation pad in the molding cavity formed by the cover mold 300 and the sole mold 200, realizing the integral molding of the shoe upper and the sole. There is no need to support the shoe upper by an external expanding mechanism. After molding, the cover mold 300 and the sole mold 200 are separated, and the safety shoe can be directly removed, which is convenient to operate.

[0037] Embodiment 2

[0038] Please refer to Figure 1 、 Figure 3 、 Figure 4 、 Figure 5, on the inner wall of each group of side molds 410, there is a receiving edge 412 fixedly connected for temporarily supporting the shoe upper; there are multiple vertical grooves 413 arranged on the receiving edge 412, and each vertical groove 413 is provided with a top pin 414 in an airtight manner through a spring 415. An air passage 416 is arranged in the side mold 410, and an air source 430 provides suction force to multiple suction ports and multiple vertical grooves 413 through the air passage 416. The air source 430 is preferably an air suction pump. The spring 415 plays a role in ejecting the top pin 414. The inner ring width of the receiving edge 412 is greater than the bottom ring width of the shoe upper. When the air source 430 works, the top pin 414 can be received in the vertical groove 413 through the generated suction force. When placing the shoe upper in the receiving groove 420, multiple suction ports 411 generate suction force through the air source 430 to suck and expand the shoe upper outward. The elastic isolation pad can smoothly pass through the inner ring of the receiving edge 412 and be inserted on the bottom ring of the shoe upper. By providing the receiving edge 412 to temporarily support the shoe upper, it can effectively ensure that the position of the shoe upper relative to the receiving groove 420 is always the same each time, and it will not cause the shoe upper to be deflected due to the contact and friction with the opening 301 when sending the shoe upper to the cover mold 300 through the opening 301. When the power component drives the two groups of side molds 410 to move upward as a whole to send the shoe upper to the cover mold 300 for fixed placement, after the two groups of side molds 410 rise to a fixed height, the air source 430 stops working, the suction force of the suction ports 411 disappears and no longer sucks the shoe upper, and the suction force of the vertical grooves 413 disappears. Multiple top pins 414 move upward in the vertical grooves 413 respectively through the elastic force of the springs 415, and smoothly push the shoe upper upward into the cover mold 300 for fixed placement, avoiding the collision between the two groups of side molds 410 and the mold cover during upward movement, so that there will be no deviation in the connection area between the shoe upper and the sole of the produced safety shoes at the back, and the production quality is high.

[0039] Embodiment 3

[0040] Please refer to Figure 1 、 Figure 2 , there are multiple groups of inner protrusions arranged on the inner wall of the cover mold 300, and there are multiple groups of outer protrusions on the outer wall of the sole mold 200. The inner protrusions and outer protrusions are not shown in the figure. When the cover mold 300 and the sole mold 200 are buckled, the inner protrusions and outer protrusions are vertically staggered. The raw material can be distributed between the outer protrusions and the inner protrusions after extrusion, increasing the contact area between the sole raw material and the shoe upper, and the stability of the connection between the sole and the shoe upper after thermoforming is high.

[0041] Please refer to Figure 1 、 Figure 6 、 Figure 7, the power assembly includes a first telescopic source 440 installed on the frame 110 and a cross frame 450 connected to the movable end of the first telescopic source 440. A rotating gear 461, two groups of sliding gears 451 and a power source 460 are arranged on the cross frame 450. The power source 460 is drivingly connected to the rotating gear 461. The two groups of sliding gears 451 are respectively slidably connected to the cross frame 450 and are located on different sides of the rotating gear 461 and mesh with the rotating gear 461. The two groups of sliding gears 451 are respectively connected to the two groups of side molds 410 one by one through connecting rods 452. The first telescopic source 440 is preferably a hydraulic cylinder, and the power source 460 is preferably a servo motor. The first telescopic source 440 can drive the cross frame 450 to move vertically. The power source 460 drives the rotating gear 461 to rotate forward or backward, and drives the two groups of side molds 410 to approach and fit together, or move away from each other, so that the cover mold 300 can be smoothly buckled downward with the sole mold 200.

[0042] Please refer to Figure 1 , Figure 6 , the movable mechanism 310 includes a second telescopic source 311 installed on the frame 110 and at least one guide rod 312 penetrating through the frame 110. The guide rod 312 and the movable end of the second telescopic source 311 both extend downward and are connected to the sole mold 200. The second telescopic source 311 is preferably a hydraulic cylinder. By driving the cover mold 300 to move downward, a molding cavity is formed with the sole mold 200, and the guide rod 312 guides the movement of the cover mold 300.

[0043] Embodiment 4

[0044] The one-piece molding process for safety shoes specifically includes the following steps:

[0045] S1. The power assembly drives the two groups of side molds 410 to fit together to form a receiving groove 420. After placing the shoe upper in the receiving groove 420, the air source 430 generates suction to suck and expand the bottom circle of the shoe upper outward and keep it stable;

[0046] S2. Insert an elastic isolation pad with an outer diameter larger than the bottom circle of the shoe upper into the shoe upper to support the bottom circle of the shoe upper outward;

[0047] S3. The power assembly drives the two groups of side molds 410 to move upward as a whole, sends the expanded shoe upper to the cover mold 300, and the opening 301 on the cover mold 300 clamps the shoe upper. Then, the power assembly drives the two groups of side molds 410 to separate laterally;

[0048] S4. The movable mechanism 310 drives the cover mold 300 to move downward and buckle it together with the sole mold 200. The raw material is heat-formed into a sole in the molding cavity formed by the cover mold 300 and the sole mold 200, wrapping the bottom circle of the shoe upper and the elastic isolation pad, realizing the one-piece molding of the shoe upper and the sole.

[0049] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. One-piece forming equipment for safety shoes, characterized in that, Comprising: A supporting platform having a frame; A sole mold fixedly installed on the supporting platform; A cover mold connected to the frame through a movable mechanism, the movable mechanism being used to drive the cover mold to be buckled with the sole mold to form a sole, and the cover mold having an opening through which the shoe upper can be inserted; A feeding mechanism arranged on the frame for sending the shoe upper to be fixedly placed on the cover mold. The feeding mechanism includes side molds, and a power assembly for driving the two groups of side molds to move horizontally and vertically as a whole. After the two groups of side molds are spliced, a receiving groove adapted to the bottom circle of the shoe upper can be formed. A plurality of suction ports are arranged on the inner wall of the receiving groove. Through the suction generated by the air source, the shoe upper can be sucked outwards and stretched, and then an elastic isolation pad can be inserted from the bottom circle of the shoe upper. The outer circle of the elastic isolation pad is wider than the bottom circle of the shoe upper to support the bottom circle of the shoe upper outwards; A supporting edge is fixedly connected to the inner wall of each group of the side molds for temporarily supporting the shoe upper; A plurality of vertical grooves are arranged on the supporting edge, and each vertical groove is hermetically provided with a top pin through a spring. An air duct is arranged in the side mold, and the air source provides suction to a plurality of suction ports and a plurality of vertical grooves through the air duct; The supporting edge temporarily supports the shoe upper, which can effectively ensure that the position of the shoe upper relative to the receiving groove is always the same each time. And it will not cause the shoe upper to be deflected due to the contact and friction with the opening when sending the shoe upper to the cover mold through the opening. When the power assembly drives the two groups of side molds to move upwards as a whole to send the shoe upper to be fixedly placed on the cover mold, after the two groups of side molds rise to a fixed height, the air source stops working, the suction of the suction ports disappears and no longer sucks the shoe upper, and the suction of the vertical grooves disappears. A plurality of top pins move upwards in the vertical grooves respectively through the elastic force of the springs, and smoothly push the shoe upper upwards into the cover mold for fixed placement.

2. The one-piece forming device for safety shoes according to claim 1, wherein, A plurality of inner protrusions are arranged on the inner wall of the cover mold, and a plurality of outer protrusions are arranged on the outer wall of the sole mold. When the cover mold and the sole mold are buckled, the inner protrusions and the outer protrusions are vertically staggered, and the raw material can be distributed between the outer protrusions and the inner protrusions after being extruded.

3. The one-piece forming device for safety shoes according to claim 1, characterized in that, The power assembly includes a first telescopic source installed on the frame and a cross frame connected to the movable end of the first telescopic source. A rotating gear, two groups of sliding teeth and a power source are arranged on the cross frame. The power source is drivingly connected to the rotating gear. The two groups of sliding teeth are respectively slidably connected to the cross frame and are located on different sides of the rotating gear and mesh with the rotating gear. The two groups of sliding teeth are respectively connected to the two groups of side molds in one-to-one correspondence through connecting rods.

4. The one-piece forming device for safety shoes according to claim 1, characterized in that, The movable mechanism includes a second telescopic source installed on the frame and at least one group of guide rods penetrating through the frame. The guide rods and the movable end of the second telescopic source both extend downwards and are connected to the sole mold.

5. The one-piece forming device for safety shoes according to claim 1, characterized in that, An elastic ring is arranged on the inner circle of the opening, and the width of the inner circle of the opening is smaller than the width of the bottom circle of the shoe upper.

6. The forming process of the one-piece forming equipment for safety shoes according to any one of claims 1-5, characterized in that, Specifically, it includes the following steps: S1. The power assembly drives the two groups of side molds to be spliced to form a receiving groove. After the shoe upper is placed in the receiving groove, the bottom circle of the shoe upper can be sucked outwards and stretched and kept stable through the suction generated by the air source; S2. An elastic isolation pad with an outer circle width greater than the bottom circle width of the shoe upper is inserted into the shoe upper to support the bottom circle of the shoe upper outwards; S3. The power assembly drives the two groups of side molds to move upwards as a whole, sends the stretched shoe upper to the cover mold, and the opening on the cover mold plays a clamping role on the shoe upper. Then, the power assembly drives the two groups of side molds to separate laterally; S4. The movable mechanism drives the cover mold to move downward and engage with the sole mold. The raw material is heat-formed into a sole by wrapping the upper bottom ring and the elastic isolation pad in the molding cavity formed by the cover mold and the sole mold, realizing the integral molding of the upper and the sole.

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