Two-color eva foaming forming machine with double mold fixing structure and process

Abstract

The utility model relates to a double -colored EVA foaming forming machine and process with double -mold fixing structure belongs to double -colored EVA foaming forming machine field, its structure includes double -colored EVA foaming forming machine body, weighing mechanism, control platform, the weighing mechanism is located at double -colored EVA foaming forming machine body input end place, is used for the mold of double -colored EVA foaming forming machine body output full load, farewell traditional double -colored mold quantity's limit, realizes disposable fixation two sets of molds through double -mold fixing structure, and cooperate with the weighing mechanism of carrying two sets of molds, and the double -colored EVA foaming forming machine body of disposable processing two sets of molds, effectively improve the output, reduce the cost.

Description

TECHNICAL FIELD

[0001] The application is a double-color EVA foaming forming machine with a double-mold fixing structure and a process, belonging to the field of double-color EVA foaming forming machines. BACKGROUND

[0002] A double-color EVA foaming forming machine is a device specially used for manufacturing double-color EVA (ethylene-vinyl acetate copolymer) foam products. EVA foam is widely used in shoe sole materials, sports equipment, toys, packaging materials, etc. due to its light weight, softness, good elasticity, chemical corrosion resistance, etc.

[0003] The traditional double-color EVA foaming forming machine can only process one set of products in each forming cycle, which not only leads to low production efficiency and difficulty in meeting the needs of mass production, but also makes the production cost of unit products high. SUMMARY

[0004] In view of the deficiencies of the prior art, the application aims to provide a double-color EVA foaming forming machine with a double-mold fixing structure and a process, to solve the problems of the existing double-color EVA foaming forming machine that can only install one set of molds, low yield, and high cost.

[0005] In order to achieve the above-mentioned purpose, the application is realized by the following technical scheme: a double-color EVA foaming forming machine with a double-mold fixing structure, which comprises:

[0006] A double-color EVA foaming forming machine body, which comprises a frame for supporting internal components, a forming chamber on the frame, and a double-mold fixing structure movably located in the forming chamber, which is equipped with two molds in a synchronous forming manner to cooperate with the forming chamber to perform synchronous forming work of the two molds;

[0007] A weighing mechanism arranged at the input end of the double-color EVA foaming forming machine body for outputting the full load of the mold of the double-color EVA foaming forming machine body;

[0008] A control console arranged outside the double-color EVA foaming forming machine body for controlling the operation of the forming chamber, the double-mold fixing structure, and the weighing mechanism;

[0009] The forming chamber and the weighing mechanism are in communication to enable the mold to perform transmission work.

[0010] Further, the double-mold fixing structure comprises a moving frame, the outer side of the moving frame is provided with a positioning block, a linear driver facing the weighing mechanism is horizontally arranged on the moving frame, a synchronous part for driving connection is arranged on the linear driver, and a middle frame for clamping the mold is arranged on the synchronous part.

[0011] Further, the top of the forming chamber is provided with an upper cover, the edge of the upper cover is vertically provided with a plurality of positioning rods penetrating the positioning blocks, the middle of the forming chamber is provided with a forming plate facing the bottom surface of the double-mold fixing structure, and the bottom of the forming chamber is provided with a drive cylinder driving the vertical movement of the forming plate.

[0012] Further, in order to adapt to the double-mold fixing structure, the weighing mechanism comprises a positioning frame, the top of the positioning frame has double channels, one of the channels is provided with a first mold material seat corresponding to the synchronization part, and the other channel is provided with a second mold material seat corresponding to the middle frame, and the top of the positioning frame is respectively provided with a metering hopper guiding the mold material on the first mold material seat and the second mold material seat.

[0013] Further, in order to prevent the mold from falling off, the middle frame is fixedly connected with a plurality of positioning pins for clamping and fixing the mold.

[0014] Further, in order to improve the clamping stability, the middle frame is provided with four positioning pins, and the positioning pins are fixed by any one of interference assembly, bolt connection or welding.

[0015] Further, in order to smoothly transfer the mold, the output end of the linear driver extends between the double channels and sequentially performs the following actions:

[0016] Push-out action: the linear driver drives the moving frame to push out the empty middle frame as a whole, so that it is positioned above the second mold material seat:

[0017] Push-in action: the first mold material seat is reversely pushed into the forming chamber by the linear driver, so that the bottom surface is combined with the lower mold locked on the forming plate.

[0018] Further, in order to improve the firmness of the connection, the positioning frame and the double-color EVA foaming forming machine body are connected by one of welding and bolt fixing.

[0019] A forming process of a double-color EVA foaming forming machine with a double-mold fixing structure, which is obtained by running the double-color EVA foaming forming machine with the double-mold fixing structure, and the forming process comprises the following steps:

[0020] S1, double-color synchronous loading: the control console starts the weighing mechanism, weighs the EVA raw materials of two colors respectively, and injects the weighed raw materials into the empty first mold group in the forming chamber and the empty second mold group positioned at the weighing mechanism;

[0021] S2, alternating conveying and mold combining: the double-mold fixing structure pushes the second mold group full of raw materials of the second color into the forming chamber to combine with the first mold group, and at the same time, moves the empty first mold group back to the weighing mechanism position.

[0022] S3, double mold synchronous forming: the forming chamber is closed, and the double mold group after the mold closing is synchronously executed heating vulcanization and cooling shaping. After the forming is completed, the double mold fixing structure moves the finished product mold out, and simultaneously pushes the mold group which has been reloaded at the weighing mechanism into the forming chamber, and the circulation is repeated.

[0023] The beneficial effects of the present application are: saying goodbye to the limitation of the number of traditional double-color molds, fixing two sets of molds at a time through the double-mold fixing structure, cooperating with the weighing mechanism carrying two sets of molds, and the double-color EVA foaming forming machine body which can process two sets of molds at a time, effectively improving the yield and reducing the cost. BRIEF DESCRIPTION OF DRAWINGS

[0024] Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments with reference to the following drawings:

[0025] Figure 1 Fig. 1 is a structural schematic diagram of a double-color EVA foaming forming machine of the present application;

[0026] Figure 2 Fig. 2 is a detailed structural schematic diagram of the double-color EVA foaming forming machine of the present application;

[0027] Figure 3 Fig. 3 is another perspective view of the structural schematic diagram of the double-color EVA foaming forming machine of the present application; Figure 2

[0028] Figure 4 Fig. 4 is a detailed structural schematic diagram of the double-color EVA foaming forming machine body of the present application;

[0029] Figure 5 Fig. 5 is a front view structural schematic diagram of the double-color EVA foaming forming machine body of the present application;

[0030] Figure 6 Fig. 6 is a detailed structural schematic diagram of the weighing mechanism of the present application;

[0031] Figure 7 Fig. 7 is a structural schematic diagram of the double-mold fixing structure of the present application;

[0032] Figure 8 Fig. 8 is a step schematic diagram of a double-color EVA foaming forming process of a double-color EVA foaming forming machine with a double-mold fixing structure.

[0033] Fig. 1, double-color EVA foaming forming machine body; 11, forming chamber; 111, upper cover; 112, positioning rod; 113, forming plate; 12, double-mold fixing structure; 121, moving frame; 122, positioning block; 123, linear driver; 124, synchronization piece; 125, middle frame; 2, weighing mechanism; 21, positioning frame; 22, first mold loading; 23, second mold loading seat; 24, metering hopper; 3, control console.​ DETAILED DESCRIPTION

[0034] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application is further described below in conjunction with specific embodiments. Embodiment I:

[0036] Embodiment 1:

[0037] Referring to Figs. 1-3, Figure 1 , Figure 2 and Figure 3 , the present embodiment provides a technical scheme of a double-color EVA foaming forming machine with a double-mold fixing structure: the structure comprises:

[0038] a double-color EVA foaming forming machine body 1, which comprises a frame for supporting internal components, a forming chamber 11 on the frame, and a double-mold fixing structure 12 movably located in the forming chamber 11, the double-mold fixing structure 12 being configured to simultaneously assemble two molds and cooperate with the forming chamber 11 to perform synchronous forming work of the two molds;

[0039] a weighing mechanism 2, which is arranged at an input end of the double-color EVA foaming forming machine body 1 and is configured to output the molds of the double-color EVA foaming forming machine body 1 full of load;

[0040] a control console 3, which is arranged outside the double-color EVA foaming forming machine body 1 and is configured to control the operation of the forming chamber 11, the double-mold fixing structure 12, and the weighing mechanism 2;

[0041] The forming chamber 11 is in communication with the weighing mechanism 2 to enable the molds to perform transmission work.

[0042] Referring to Figs. 1-3, Figure 7 in order to fix the double molds, the double-mold fixing structure 12 comprises a moving frame 121, the moving frame 121 is provided with a positioning block 122 on the outside, a linear driver 123 is horizontally arranged on the moving frame 121 and faces the weighing mechanism 2, a synchronous part 124 for driving connection is arranged on the linear driver 123, a middle frame 125 for clamping the molds is arranged on the synchronous part 124, four positioning pins are fixedly connected to the middle frame 125, and the positioning pins are fixed by any one of interference assembly, bolt connection, or welding.

[0043] Referring to Figs. 1-3, Figure 4 and Figure 5As shown, in order to realize the accurate positioning of the forming chamber 11, the upper cover 111 is arranged at the top of the forming chamber 11, and a plurality of positioning rods 112 are vertically arranged at the edge of the upper cover 111 and penetrate the positioning blocks 122, a forming plate 113 is arranged in the middle of the forming chamber 11 and faces the bottom surface of the double-mold fixing structure 12, and a drive cylinder is arranged at the bottom of the forming chamber 11 and drives the vertical movement of the forming plate 113.

[0044] Embodiment 2:

[0045] This embodiment describes the synchronous loading process of the device, which is described with reference to Figure 6 As shown, in order to realize the efficient loading of the mold and the accurate metering of the material, the specific structure is as follows, the weighing mechanism 2 includes a positioning frame 21, the positioning frame 21 has double channels at the top, one channel is provided with a first mold material loading seat 22 corresponding to the synchronization piece 124, and the other channel is provided with a second mold material loading seat 23 corresponding to the middle frame 125, the positioning frame 21 is respectively provided with a metering hopper 24 for guiding the material of the mold on the first mold material loading seat 22 and the second mold material loading seat 23, wherein the first mold material loading seat 22 is used for loading the lower mold, and the second mold material loading seat 23 is used for loading the middle frame 125.

[0046] In order to improve the firmness of the connection, the positioning frame 21 is connected to the double-color EVA foaming forming machine body 1 in one of the welding and bolt fixing modes, and preferably in the bolt fixing mode, so as to facilitate the disassembly and repair work.

[0047] The synchronous loading process specifically includes the following steps:

[0048] Preparation stage: the first mold material loading seat 22 is provided with an empty lower mold, and the second mold material loading seat 23 is provided with an empty middle frame 125;

[0049] Material metering: the console 3 issues an instruction to start the metering hopper 24, the metering hopper 24 accurately meters one color of EVA material and injects it into the lower mold cavity on the first mold material loading seat 22, accurately meters another color of EVA material and injects it into the middle frame 125 cavity on the second mold material loading seat 23, and stops operating after the material injection is completed, so as to ensure that the two sets of molds are respectively loaded with accurately metered EVA materials.

[0050] The double-channel design and double-hopper design of the positioning frame 21 can simultaneously process two sets of molds, reduce the operation steps, improve the production efficiency, not only reduce the operation steps and waiting time, but also improve the consistency of product quality and the flexibility of the equipment, and through the automatic operation and modular design, further reduce the manual intervention, and improve the reliability and maintainability of the equipment.

[0051] Embodiment 3:

[0052] In order to smoothly transfer the mold, the output end of the linear actuator 123 extends into the double channel, and the following actions are performed in sequence:

[0053] 1. Preparation stage:

[0054] The linear actuator 123 is in standby state, the moving frame 121 is located at the initial position of the molding chamber 11, the middle frame 125 is in empty state and is located on the moving frame 121, the first mold carrier 22 and the second mold carrier 23 are both in empty state, ready to receive new molds.

[0055] 2. Push-out action: The linear actuator 123 drives the moving frame 121 to push out the empty middle frame 125 as a whole, so that it is positioned above the second mold carrier 23, and the specific implementation is as follows:

[0056] The console 3 issues an instruction to start the linear actuator 123, so that the output end of the linear actuator 123 extends outward, and the output end of the linear actuator 123 pushes the moving frame 121 to move outward along the set track. When the moving frame 121 moves to the upper side of the second mold carrier 23, the middle frame 125 is just located above the second mold carrier 23, the linear actuator 123 stops extending and keeps the current position, the clamping device on the moving frame 121 releases, and the middle frame 125 is placed on the second mold carrier 23. The linear actuator 123 reverses to shrink, and the moving frame 121 is pulled back to the initial position, ready for the next operation.

[0057] 3. Push-in action: The first mold carrier 22 is pushed into the molding chamber 11 by the linear actuator 123 in reverse, so that the bottom surface of the first mold carrier 22 is matched with the lower mold fixed on the forming plate 113, and the specific implementation is as follows:

[0058] After the push-out action is completed, the metering hopper 24 injects EVA material into the mold cavity of the middle frame 125, so that it becomes a full load state. At the same time, the metering hopper 24 also injects another color of EVA material into the lower mold on the first mold carrier 22. The console 3 issues an instruction again to start the linear actuator 123, so that the output end of the linear actuator 123 extends outward, and the output end of the linear actuator 123 pushes the first mold carrier 22 to move along the set track to the molding chamber 11. The first mold carrier 22 moves into the molding chamber 11, and the bottom surface of the first mold carrier 22 is matched with the lower mold fixed on the forming plate 113. At this time, the positioning device in the molding chamber 11 ensures the accurate alignment of the lower mold and the middle frame 125. The linear actuator 123 reverses to shrink, and the first mold carrier 22 is pulled back to the standby position, ready to receive the next empty lower mold.

[0059] Through the aforementioned "pushing out" and "pushing in" actions, the linear actuator 123 achieves smooth transmission and precise positioning of the middle frame 125 and the lower mold. This process not only improves the efficiency of mold transmission but also ensures the stability of the mold during the forming process, thereby effectively improving production efficiency and product quality. Specific Implementation Method Two:

[0061] Example 1:

[0062] like Figure 8 As shown, this embodiment provides a molding process for a two-color EVA foaming molding machine with a dual-mold fixed structure, which is obtained by running the two-color EVA foaming molding machine with a dual-mold fixed structure. The molding process specifically includes the following steps.

[0063] S1, Dual-color synchronous loading:

[0064] 1. Control command issuance: The control console 3 starts the weighing mechanism 2 and sends a two-color raw material ratio command to it to start the raw material metering program. The control console 3 ensures the accurate operation of the weighing mechanism 2 through the automatic control system.

[0065] 2. Color Separation, Weighing and Injection: The weighing mechanism 2 includes a positioning frame 21 with a double channel at the top, which is respectively provided with a first mold material carrier 22 and a second mold material carrier 23. The weighing mechanism 2 weighs the two colors of EVA raw materials respectively. The first mold group (located in the molding chamber 11 and in an unloaded state) is used to receive the first color raw material, and the second mold group (positioned at the weighing mechanism 2 and in an unloaded state) is used to receive the second color raw material. After the metering hopper 24 accurately measures the raw material, it injects the first color EVA raw material into the lower mold cavity on the first mold material carrier 22 and injects the second color EVA raw material into the middle frame 125 mold cavity on the second mold material carrier 23.

[0066] S2, Alternating conveyor mold closing:

[0067] 1. Mold assembly position switching: The linear actuator 123 in the dual mold fixing structure 12 performs lateral movement through the moving frame 121, pushing the second mold assembly fully loaded with the second color raw material into the molding chamber 11 along the communication path between the molding chamber 11 and the weighing mechanism 2. At the same time, the linear actuator 123 pulls the unloaded first mold assembly back to the loading position of the weighing mechanism 2, ready to receive new raw materials.

[0068] 2. Dynamic mold closing: After the second mold group enters the molding chamber 11, it is aligned with the first mold group in the vertical direction. The control console 3 triggers the mold closing mechanism of the molding chamber 11, so that the two mold groups are precisely closed under pressure. The top cover 111 and the positioning rod 112 at the top of the molding chamber 11 ensure the precise positioning of the mold group.

[0069] S3, double-mold synchronous forming:

[0070] 1. Heating vulcanization: After the forming chamber 11 is closed, the control console 3 starts the heating system to vulcanize the double-mold set, so that the EVA raw material in the mold undergoes a chemical reaction to form a stable foaming structure;

[0071] 2. Cooling and shaping: After vulcanization is completed, the control console 3 switches the cooling system to solidify and shape the EVA foam, ensuring that the foam is uniformly cooled in the mold to form a stable finished product;

[0072] 3. Cycle triggering: After the mold is opened, the drive cylinder in the double-mold fixing structure 12 drives the forming plate 113 to descend, moving the finished mold out of the forming chamber 11, and at the same time, the double-mold fixing structure 12 pushes the mold set that has been reloaded on the weighing mechanism 2 station into the forming chamber 11, realizing a cycle of reciprocating forming process.

[0073] Among them, the heating vulcanization of the present application is divided into primary vulcanization and secondary vulcanization:

[0074] Primary vulcanization is the initial solidification stage in the forming process. After the mold is closed, the heating system in the forming chamber 11 starts to work, heating the EVA material in the mold to ensure that the EVA material undergoes initial chemical reaction to form a stable foaming structure. The purpose is to make the EVA material initially formed in the mold, while maintaining a certain flexibility to facilitate further optimization of the physical properties of the product in the subsequent secondary vulcanization.

[0075] Secondary vulcanization is a key step to further improve product performance. After primary vulcanization is completed, the forming plate 113 is lowered and the mold is opened, and the semi-finished product is taken out. At this time, the semi-finished product is transferred to a special secondary vulcanization equipment, which is usually processed at a higher temperature. The purpose is to further solidify the EVA material, enhance its physical properties, and make the foaming structure of the product more uniform and have better dimensional stability, which can meet higher use requirements.

[0076] The present application eliminates the limitation of the number of traditional double-color molds, realizes the one-time fixation of two sets of molds through the double-mold fixing structure 12, cooperates with the weighing mechanism 2 carrying two sets of molds, and the double-color EVA foaming forming machine body 1 capable of processing two sets of molds at a time, effectively improves the yield and reduces the cost.

[0077] The foregoing merely illustrates the principles of the application and application of its leading features. This application is not limited to the illustrative embodiments shown and described herein. Rather, the scope of the present application is defined by the appended claims, and other embodiments of this application will readily occur to those skilled in the art. Accordingly, the application is not limited to that described in the foregoing description or illustrated in the accompanying drawings. It is intended to cover any adaptations or variations of proven equivalents to a readily available materials and of the application including its operation and uses of benefits and / or combinations of the adaptations and variations. Therefore, it is manifestly intended that this application be limited only by the embodiments of the claims based on the patentability of the patent claims.

[0078] In addition, it should be understood that although the description herein is made on the basis of the embodiments, not every embodiment contains only one independent technical solution, and the description herein is only for the sake of clarity, and those skilled in the art should understand the description as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

Claims

1. A two-color EVA foaming molding machine having a double mold fixing structure, characterized by: The structure comprises: The two-color EVA foaming forming machine body (1) comprises a frame for supporting internal components, a forming chamber (11) on the frame, and a double-mold fixing structure (12) movably located in the forming chamber (11), which is matched with the forming chamber (11) to perform synchronous forming work of two molds in a manner of simultaneously assembling two molds; The weighing mechanism (2) is arranged at the input end of the two-color EVA foaming forming machine body (1) and is used to output the full load mold of the two-color EVA foaming forming machine body (1); The console (3) is arranged outside the two-color EVA foaming forming machine body (1) and is used to control the operation of the forming chamber (11), the double-mold fixing structure (12), and the weighing mechanism (2); The forming chamber (11) is communicated with the weighing mechanism (2) to enable the mold to perform transmission work; The double-mold fixing structure (12) comprises a moving frame (121), the outer side of the moving frame (121) is provided with a positioning block (122), a linear driver (123) facing the weighing mechanism (2) is horizontally arranged on the moving frame (121), a synchronous part (124) for driving connection is arranged on the linear driver (123), and a middle frame (125) for clamping the mold is arranged on the synchronous part (124); The weighing mechanism (2) comprises a positioning frame (21), the top of the positioning frame (21) has double channels, one of the channels is provided with a first mold material seat (22) corresponding to the synchronous part (124), the other channel is provided with a second mold material seat (23) corresponding to the middle frame (125), and the top of the positioning frame (21) is respectively provided with a metering hopper (24) for guiding the mold on the first mold material seat (22) and the second mold material seat (23); The output end of the linear driver (123) extends between the double channels, and the following actions are sequentially performed: Push-out action: The linear driver (123) drives the moving frame (121) to push out the empty middle frame (125) as a whole, so that the middle frame (125) is positioned above the second mold material seat (23); Push-in action: The first mold material seat (22) is reversely pushed into the forming chamber (11) by the linear driver (123), so that the bottom surface of the first mold material seat (22) is matched with the lower mold locked on the forming plate (113).

2. The double-color EVA foaming forming machine with double-mold fixing structure according to claim 1, characterized in that: The top of the forming chamber (11) is provided with an upper cover (111), a plurality of positioning rods (112) vertically arranged at the edge of the upper cover (111) penetrate and position the positioning block (122), a forming plate (113) facing the bottom surface of the double-mold fixing structure (12) is arranged in the middle of the forming chamber (11), and a drive cylinder for driving the vertical movement of the forming plate (113) is arranged in the bottom of the forming chamber (11).

3. The double-color EVA foaming forming machine with double-mold fixing structure according to claim 1, characterized in that: The middle frame (125) is fixedly connected with a plurality of positioning pins for clamping and fixing the mold.

4. The double-color EVA foaming forming machine with double-mold fixing structure according to claim 3, characterized in that: The middle frame (125) is provided with four positioning pins, and the positioning pins are fixed by any one of interference assembly, bolt connection, or welding.

5. The double-color EVA foaming forming machine with double-mold fixing structure according to claim 1, characterized in that: The positioning frame (21) is connected with the two-color EVA foaming forming machine body (1) by one of welding and bolt fixing.

6. A molding process of a two-color EVA foaming molding machine having a double-mold fixing structure, characterized by: The two-color EVA foaming forming machine with the double-mold fixing structure according to any one of claims 1-5 is operated to obtain a forming process, which comprises the following steps: S1, double-color synchronous loading: the console (3) starts the weighing mechanism (2), weighs the two colors of EVA raw materials respectively, and injects the weighed raw materials into the first mold group in the empty loading state in the forming chamber (11) and the second mold group in the empty loading state at the weighing mechanism (2) respectively; S2, alternating conveying and mold closing: the double-mold fixing structure (12) pushes the second mold group full of the raw materials of the second color into the forming chamber (11) to be combined with the first mold group, and at the same time, moves the first mold group in the empty loading state back to the position of the weighing mechanism (2); S3, double-mold synchronous forming: the forming chamber (11) is closed, and the double-mold group after mold closing is synchronously executed heating, vulcanization and cooling, and after the forming is completed, the double-mold fixing structure (12) moves the finished product mold out, at the same time, pushes the mold group reloaded at the weighing mechanism (2) into the forming chamber (11), and circulates repeatedly.

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