Foaming equipment and foaming process for sole production

Abstract

The invention relates to the technical field of sole processing, in particular to foaming equipment for sole production and a foaming technology.The foaming equipment comprises a workbench, a top mold, a lifting assembly and a feeding assembly, supporting legs are arranged at the four corners of the lower portion of the workbench, and the lifting assembly comprises a lifter, a lifting plate and a bottom mold; the output end of the lifter penetrates through the workbench and is connected with the lifting plate, a bottom die matched with the top die is arranged below the lifting plate, two sets of symmetrically-arranged side plates are further arranged on the workbench, the lifting plate is arranged between the two sets of side plates, an electromagnetic valve and a flow meter are arranged in a discharging pipe of the feeding assembly, and the electromagnetic valve is connected with the flow meter. The feeding assembly drives the feeding plate to automatically move to the position above the bottom die, the electromagnetic valve is matched with the flow meter for automatic discharging, after discharging is completed, the feeding plate automatically retreats (misplaced with the lifting plate, and die assembly interference is avoided), and manual adjustment is not needed in the whole process; uniform material distribution is realized, and the foaming stability of a product is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of shoe sole processing, in particular to a foaming equipment for shoe sole production and a foaming process. BACKGROUND

[0002] The foaming equipment for shoe sole production is a core equipment for forming shoe soles made of elastic materials such as polyurethane (PU) and ethylene-vinyl acetate copolymer (EVA), which converts liquid or granular raw materials into shoe sole semi-finished products with light weight, high elasticity and wear resistance through the process of "raw material mixing-high temperature foaming-mold shaping";

[0003] Traditional foaming materials need to be evenly spread on the bottom mold by the staff, and then the mold is closed for foaming. During this process, the staff needs to ensure the uniformity of the material spreading, otherwise uneven foaming may occur. SUMMARY

[0004] (I) Technical problems solved

[0005] In view of the deficiencies of the prior art, the present application provides a foaming equipment for shoe sole production and a foaming process.

[0006] (II) Technical solutions

[0007] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a foaming equipment for shoe sole production, comprising a workbench, a top mold, a lifting assembly and a feeding assembly, the workbench is provided with supporting legs at the four corners, the lifting assembly comprises a lifter, a lifting plate and a bottom mold, the output end of the lifter penetrates through the workbench and is connected with the lifting plate, the bottom mold is arranged below the lifting plate and is matched with the top mold, the workbench is further provided with two groups of symmetrically arranged side plates, the lifting plate is arranged between the two groups of side plates, and a top plate is further arranged above the two groups of side plates, the top plate is provided with the top mold below, the feeding assembly comprises a feeding assembly, a feeding plate, a hopper, a discharge pipe, a feeding pipe, a cover and a switch valve, a plurality of groups of hoppers are arranged on the feeding plate, the hoppers are provided with a discharge pipe penetrating through the feeding plate below, the feeding assembly is arranged on the two groups of side plates to drive the feeding plate to move, the hoppers are further provided with a feeding pipe, the feeding pipe is provided with a cover, the discharge pipe is further provided with a switch valve, and the feeding plate and the lifting plate are dislocated, so that the bottom mold and the top mold can be closed.

[0008] In order to conveniently ensure the stable feeding of the feeding plate, the feeding assembly comprises a cover body, a worm wheel, a worm, a motor, a screw rod and a sliding frame, the proximal sides of the two groups of side plates are symmetrically provided with the sliding frames, the proximal sides of the two groups of sliding frames are provided with sliding grooves, the screw rod is rotationally arranged in the sliding groove, the left and right sides of the feeding plate extend into the corresponding sliding grooves and are threadedly connected with the screw rod, the back sides of the two groups of sliding frames are further provided with the cover body, the worm and the two groups of worm wheels are arranged in the cover body, the worm is engaged with the two groups of worm wheels, and the output end of the motor penetrates through the cover body and is connected with the worm.

[0009] In order to ensure the stability of the lifting of the lifting plate, the lifting plate is further provided with a guide rod penetrating through the workbench.

[0010] Preferably, the switch valve adopts an electromagnetic valve, and the blanking pipe is further embedded with a flowmeter.

[0011] Preferably, the side plate is further provided with a reinforcing rib connected with the sliding frame.

[0012] Preferably, the top die is connected with the top plate through a first bolt, and the bottom die is connected with the lifting plate through a second bolt.

[0013] Preferably, the motor adopts a servo motor, and the lifter adopts a hydraulic cylinder.

[0014] A foaming process of a shoe sole adopts the foaming equipment for shoe sole production, and comprises the following steps:

[0015] Step 1, opening the cover body, supplementing the material in the stock bin;

[0016] Step 2, starting the feeding assembly, and moving the feeding plate carrying the stock bin to the upper side of the bottom die by the feeding assembly;

[0017] Step 3, the switch valve cooperates with the flowmeter and the feeding assembly to drive the feeding plate to feed, so as to realize uniform blanking;

[0018] Step 4, the switch valve is closed, the feeding plate is dislocated with the lifting plate, the lifter drives the lifting plate to rise, the bottom die and the top die complete the die closing, and the processing is completed.

[0019] (Three) beneficial effects

[0020] Compared with the prior art, the foaming equipment for shoe sole production and the foaming process have the following beneficial effects:

[0021] The shoe sole production foaming equipment and foaming process, the built-in electromagnetic valve and flow meter of the feeding assembly of the blanking pipe, cooperate with the external controller to realize "on-demand feeding", the feeding assembly drives the feeding plate to automatically move to the top of the bottom die, the electromagnetic valve cooperates with the flow meter to automatically feed, and the feeding plate automatically retreats after feeding (dislocated with the lifting plate to avoid mold interference), without manual adjustment throughout the process;

[0022] Realize uniform distribution, ensure the stability of product foaming. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the first main view schematic diagram of the structure of the application;

[0024] Figure 2 It is the second main view schematic diagram of the structure of the application;

[0025] Figure 3 It is the third main view schematic diagram of the structure of the application;

[0026] Figure 4 It is the structure of the application Figure 2 It is the local enlarged schematic diagram of A in the application structure;

[0027] Figure 5 It is the local schematic diagram of the structure of the application;

[0028] Figure 6 It is the structure of the application Figure 5 It is the local enlarged schematic diagram of B in the application structure.

[0029] In the figure: 1, workbench; 2, top die; 3, leg; 4, lifter; 5, lifting plate; 6, bottom die; 7, side plate; 8, top plate; 9, feeding plate; 10, stock bin; 11, blanking pipe; 12, feeding pipe; 13, cover; 14, switch valve; 15, cover; 16, worm; 17, worm; 18, motor; 19, screw; 20, sliding frame; 21, guide rod; 22, reinforcing rib; 23, first bolt; 24, second bolt. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the application.

[0031] Please refer to Figures 1-6The utility model provides a kind of foaming equipment for sole production, including workbench 1, top die 2, lifting assembly and feeding assembly, the workbench 1 lower four corners are provided with support leg 3, the lifting assembly includes lifter 4, lifting plate 5 and bottom die 6, the lifter 4 output passes through the workbench 1 and is connected with the lifting plate 5, the lifting plate 5 below is provided with the bottom die 6 compatible with the top die 2, the workbench 1 is also provided with two groups of symmetrically arranged side plates 7, the lifting plate 5 is arranged between two groups of the side plates 7, and top plate 8 is further provided above two groups of the side plates 7, the top plate 8 below is provided with the top die 2, the feeding assembly includes feeding assembly, feeding plate 9, stock bin 10, discharge pipe 11, feeding pipe 12, cover 13 and switch valve 14, the feeding plate 9 is provided with several groups of stock bin 10, the stock bin 10 below is provided with discharge pipe 11 passing through the feeding plate 9, and the feeding assembly for moving the feeding plate 9 is arranged on two groups of the side plates 7, the stock bin 10 is also provided with feeding pipe 12, the feeding pipe 12 is provided with cover 13, and switch valve 14 is further provided on the discharge pipe 11, after the feeding plate 9 is dislocated with lifting plate 5, bottom die 6 and top die 2 can be combined.

[0032] The operator opens the cover 13 on the stock bin 10, and supplements the pretreated raw material (PU material needs to be heated to 40-50 DEG C in advance to reduce the viscosity, and EVA material needs to be uniformly premixed with foaming agent) into the stock bin 10 through the feeding pipe 12, the volume of the stock bin 10 is designed according to the production capacity (such as 5L, which can meet the material for 100 mold times), and the cover 13 is closed after the supplement is completed to prevent the raw material from being damp or mixed with impurities.

[0033] The lifter 4 is started, the lifter 4 is lifted under the support of the workbench 1, the lifting plate 5 is lifted, the lifting plate 5 is provided with the bottom die 6 with a mold groove, the bottom die 6 is lifted to a certain height, at this time, the discharge pipe 11 is located above the mold groove, the feeding assembly is started, the feeding assembly drives the feeding plate 9 to move, at this time, the switch valve 14 is opened, the switch valve 14 is an electromagnetic valve, and is used with a flowmeter to complete the uniform distribution of materials in the mold groove.

[0034] The support leg 3 stably supports the workbench 1, the workbench 1 provides stable support for the two groups of side plates 7, the top plate 8 is provided above the two groups of side plates 7, the top die 2 is connected with the top plate 8 through the first bolt 23, the bottom die 6 is connected with the lifting plate 5 through the second bolt 24, when the feeding plate 9 is dislocated with the lifting plate 5, at this time, the lifter 4 drives the lifting plate 5 to rise, and the combining of the bottom die 6 and the top die 2 is completed.

[0035] In this embodiment, the feeding assembly comprises a cover 15, a worm wheel 16, a worm 17, a motor 18, a screw rod 19 and a sliding frame 20, the sliding frame 20 is symmetrically arranged on the proximal side of each of the two groups of side plates 7, the sliding frames 20 of the two groups are arranged on the proximal side, the screw rod 19 is rotatably arranged in the sliding groove, the feeding plate 9 is inserted into the corresponding sliding groove on the left and right sides and is threadedly connected with the screw rod 19, the cover 15 is further arranged on the back side of the sliding frames 20, the worm 17 and the two groups of worm wheels 16 are arranged in the cover 15, the worm 17 is engaged with the two groups of worm wheels 16, the output end of the motor 18 penetrates through the cover 15 and is connected with the worm 17, the motor 18 is started, the motor 18 drives the worm 17 in the cover 15 to rotate, the worm 17 drives the two groups of worm wheels 16 to rotate, the two groups of worm wheels 16 drive the two groups of screw rods 19 to rotate, and the feeding plate 9 is driven by the support of the sliding frame 20 and the two groups of screw rods 19 to realize the forward and backward movement.

[0036] In this embodiment, the guide rod 21 penetrating through the workbench 1 is further arranged below the lifting plate 5, so as to ensure the stability of the lifting of the lifting plate 5.

[0037] In actual use, the reinforcing rib 22 connected with the sliding frame 20 is further arranged on the side plate 7, so as to ensure the strength of the sliding frame 20.

[0038] The motor 18 adopts the servo motor 18 with accurate control, and the lifter 4 adopts the hydraulic cylinder with stable operation.

[0039] A foaming process of a shoe sole, which adopts the above-mentioned foaming equipment for shoe sole production, comprises the following steps:

[0040] Step 1, opening the cover 13, supplementing the material in the material bin 10;

[0041] Step 2, starting the feeding assembly, and driving the feeding plate 9 carrying the material bin 10 to move to the upper side of the bottom die 6;

[0042] Step 3, the on-off valve 14 cooperates with the flowmeter and the feeding assembly to drive the feeding plate 9 to feed, so as to realize uniform feeding;

[0043] Step 4, the on-off valve 14 is closed, the feeding plate is dislocated with the lifting plate 5, the lifter 4 drives the lifting plate 5 to rise, the bottom die 6 and the top die 2 complete the die closing, and the processing is completed.

[0044] It should be noted that when the feeding plate 9 moves to the upper side of the bottom die 6 (the position signal is fed back by the encoder of the motor 18, and the positioning deviation is ≤0.1mm), the motor 18 is automatically stopped, and the distance between the feeding plate 9 and the bottom die 6 is controlled to be 10-15mm (to avoid that the material is accumulated due to too close distance, and the material is scattered due to too far distance);

[0045] The outer controller sends a signal to open the electromagnetic valve on the discharge pipe 11, and the raw materials fall along the discharge pipe 11 under the action of gravity, and the flow meter monitors the discharge amount in real time (the data is transmitted to the controller synchronously); when the discharge amount reaches the preset value (such as 80g), the controller immediately closes the electromagnetic valve (the closing delay is less than or equal to 0.05s), so as to avoid excessive raw materials;

[0046] The feeding assembly drives the feeding plate 9 to move slowly at a speed of 5-10mm / s, and the electromagnetic valve is intermittently opened (each opening time is 0.5-1s), which is matched with the movement to realize the uniform coverage of the raw materials in the whole domain (the uniformity of the material is greater than or equal to 98%), so as to avoid the problems of "local accumulation" and "material shortage at the corners" in the traditional manual material spreading;

[0047] After the shaping time ends, the lifter 4 drives the lifting plate 5 to slowly descend (the descending speed is 30mm / s), and the bottom die 6 is separated from the top die 2; when the lifting plate 5 descends to the initial position (is flush with the workbench 1), the operator takes out the foamed shoe sole semi-finished product by means of a tool (or automatically takes the material by means of a mechanical hand), and sends it to a cooling line for cooling (is cooled to room temperature 25-30℃, so as to avoid subsequent shrinkage);

[0048] The feeding assembly drives the feeding plate 9 to reset to the initial position (the hopper 10 is located outside the equipment, so as to facilitate the replenishment of raw materials), and the electromagnetic valve and the flow meter are reset, so as to prepare for the next batch of material spreading.

[0049] In this document, the term "example" is used to mean that a specific feature, structure, or characteristic under discussion can be included in at least one example of the application. The appearances of the term "example" in various places in the specification are not necessarily all referring to the same example, nor are they necessarily referring to the same instance of the application. In principle, any feature of an example that is described as being an "example" can be combined with any other feature of another example to create an implementation of the application that is a new example.

[0050] Unless otherwise defined, the technical terms used in this document have the same meanings as those commonly understood by one of ordinary skill in the art to which this application belongs; the use of related terms in this document is only for the purpose of describing specific examples, and is not intended to limit the application.

[0051] Although the embodiments of the application have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the application.

Claims

1. A foaming apparatus for shoe sole production, comprising a worktable (1), a top mold (2), a lifting assembly and a feeding assembly, characterized in that, The workbench (1) is provided with supporting legs (3) at four corners, the lifting assembly comprises a lifter (4), a lifting plate (5) and a bottom die (6), the output end of the lifter (4) penetrates the workbench (1) and is connected with the lifting plate (5), the bottom die (6) is arranged below the lifting plate (5) and is matched with the top die (2), the workbench (1) is further provided with two groups of symmetrically arranged side plates (7), the lifting plate (5) is arranged between the two groups of side plates (7), and the top plate (8) is further arranged above the two groups of side plates (7), the top die (2) is arranged below the top plate (8), the feeding assembly comprises a feeding assembly, a feeding plate (9), a stock bin (10), a discharging pipe (11), a feeding pipe (12), a cover (13) and an on-off valve (14), a plurality of groups of stock bins (10) are arranged on the feeding plate (9), the stock bin (10) is provided below the feeding plate (9) and is provided with a discharging pipe (11) penetrating the feeding plate (9), the feeding assembly is arranged on the two groups of side plates (7) and drives the feeding plate (9) to move, the stock bin (10) is further provided with a feeding pipe (12), the feeding pipe (12) is provided with a cover (13), the discharging pipe (11) is further provided with an on-off valve (14), and after the feeding plate (9) is dislocated with the lifting plate (5), the bottom die (6) and the top die (2) can be combined.

2. The foaming apparatus for shoe sole production according to claim 1, wherein, The feeding assembly comprises a cover (15), a worm gear (16), a worm (17), a motor (18), a screw rod (19) and a sliding frame (20), the sliding frames (20) are symmetrically arranged on the sides of the two groups of side plates (7), the sliding frames (20) are provided with sliding grooves on the sides, the screw rods (19) are rotatably arranged in the sliding grooves, the feeding plate (9) is inserted into the corresponding sliding grooves on the left and right sides and is threadedly connected with the screw rods (19), the cover (15) is further arranged on the back sides of the sliding frames (20), the worm (17) and the two groups of worm gears (16) are arranged in the cover (15), the worm (17) is engaged with the two groups of worm gears (16), and the output end of the motor (18) penetrates the cover (15) and is connected with the worm (17).

3. The foaming apparatus for shoe sole production according to claim 2, wherein, The lifting plate (5) is further provided with a guide rod (21) penetrating the workbench (1).

4. The foaming apparatus for shoe sole production according to claim 3, wherein The on-off valve (14) is an electromagnetic valve, and the discharging pipe (11) is further embedded with a flowmeter.

5. The foaming apparatus for shoe sole production according to claim 4, wherein The side plates (7) are further provided with reinforcing ribs (22) connected with the sliding frames (20).

6. The foaming apparatus for shoe sole production according to claim 5, wherein The top die (2) is connected with the top plate (8) through first bolts (23), and the bottom die (6) is connected with the lifting plate (5) through second bolts (24).

7. The foaming apparatus for shoe sole production according to claim 6, wherein The motor (18) is a servo motor (18), and the lifter (4) is a hydraulic cylinder.

8. A foaming process of a shoe sole, comprising a foaming apparatus for shoe sole production according to claim 7, characterized in that, The method comprises the following steps: Step 1, open the cover (13) and supplement the material in the stock bin (10); Step 2, start the feeding assembly, and the feeding assembly drives the feeding plate (9) carrying the stock bin (10) to move to the upper side of the bottom die (6). Step 3, switch valve (14) cooperate with flowmeter and feed assembly drive feed plate (9) feeding, realize uniform discharging; Step 4, switch valve (14) is closed, feed plate and lifting plate (5) are dislocated, lifting device (4) drives lifting plate (5) to rise, bottom die (6) and top die (2) complete die closing, complete processing.

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