Heating device on EVA (Ethylene Vinyl Acetate) foam forming machine

Abstract

The utility model relates to a heating device on an EVA (Ethylene Vinyl Acetate) foam forming machine, which comprises a template fixing seat, a lower base plate, a lower heat insulation plate, a lower heating plate group, an upper heating plate group, an upper heat insulation plate, a mold movable seat and a shaft rod driving assembly, the template fixing seat, the lower base plate, the lower heat insulation plate, the lower heating plate group, the upper heating plate group, the upper heat insulation plate, the mold movable seat and the shaft rod driving assembly are sequentially arranged from bottom to top, the template fixing seat, the lower base plate, the lower heat insulation plate and the lower heating plate group are sequentially connected, and the upper heat insulation plate, the mold movable seat and the shaft rod driving assembly are sequentially connected; the shaft rod driving assembly drives the mold movable seat, the upper heat insulation plate and the upper heating plate group to move up and down, the up-down moving process is more stable, the upper heating plate group and the lower heating plate group are connected through the shaft rod driving assembly, the temperature measuring rod and the electric heating rod are inserted into the lower heating plate group and the upper heating plate group, and double heating stations are arranged between the lower heating plate group and the upper heating plate group. And the mold movable seat does not shake in the up-and-down moving process.

Description

Technical Field

[0001] This utility model belongs to the technical field of shoe mold heating equipment, specifically relating to a heating device on an EVA foam molding machine. Background Technology

[0002] Foaming molding machines are molding machines used for foaming processes. The manufacturing of foamed materials varies greatly depending on the type of resin, foam type, and foaming method used. Correspondingly, foaming molding machines also come in various styles. They can generally be divided into continuous foaming machines such as extrusion, calendering, and casting; and intermittent foaming machines such as injection molding, integral molding, and vacuum forming of foamed sheets. Regardless of the type, foaming molding machines require a mold for heating, causing the foam particles within the mold to foam. After cooling and solidification, a shoe mold is obtained. Currently, most foaming molding machines only have a single station for foaming, resulting in a small foaming capacity and low production efficiency. While dual-station foaming molding machines on the market use cylinders and guide pillars for vertical drive, long-term use can lead to misalignment of the moving plate, causing abnormal noise or gaps during the closing of the upper mold in both stations. Therefore, this solution was developed. Utility Model Content

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a heating device for an EVA foaming molding machine, which has dual heating stations and uses a shaft drive assembly to drive the mold moving seat, so that the molds on the two working stations are more synchronized and stable.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a heating device on an EVA foaming molding machine, comprising a template fixing seat, a lower pad, a lower heat insulation plate, a lower heating plate assembly, an upper heating plate assembly, an upper heat insulation plate, a mold movable seat, and a shaft drive assembly. The template fixing seat, lower pad, lower heat insulation plate, lower heating plate assembly, upper heating plate assembly, upper heat insulation plate, mold movable seat, and shaft drive assembly are arranged sequentially from bottom to top. The template fixing seat, lower pad, lower heat insulation plate, and lower heating plate assembly are connected sequentially, and the upper heat insulation plate, mold movable seat, and shaft drive assembly are connected sequentially. Electric heating rods and temperature measuring rods are inserted into the lower heating plate assembly and the upper heating plate assembly, and there is a dual heating station between the lower heating plate assembly and the upper heating plate assembly.

[0005] Furthermore, the lower heating plate assembly includes a lower left heating plate and a lower right heating plate, and the upper heating plate assembly includes an upper left heating plate and an upper right heating plate. The lower left heating plate, lower right heating plate, upper left heating plate, and upper right heating plate have the same structure.

[0006] Furthermore, the lower left heating plate has multiple rows of heating through holes on its side wall. The multiple rows of heating through holes are arranged at intervals, and there are multiple heating through holes in each row. Two electric heating rods are inserted into each heating through hole.

[0007] Furthermore, the lower left heating plate has a mounting through hole on its side wall, into which two temperature measuring rods are inserted.

[0008] Furthermore, the mounting through holes of the lower left heating plate and the lower right heating plate are centrally located, while the mounting through holes of the upper left heating plate and the upper right heating plate are located in the lower middle position.

[0009] Furthermore, a horizontal cylinder is also provided between the template fixing seat and the lower heat insulation plate.

[0010] Furthermore, the shaft drive assembly includes a cylinder body, a central hinge seat, two first hinge seats, two three-connecting plates, and two second hinge seats. The two first hinge seats are located above the second hinge seats with their hinge ends facing downwards. The two second hinge seats are respectively fixedly connected to both sides of the upper surface of the mold fixing seat with their hinge ends facing upwards. The central hinge seat is connected to the output end of the cylinder body with its hinge ends located on both sides. The three-connecting plates have an upper hinge point, a lower hinge point, and a side hinge point. The upper and lower hinge points are located at the upper and lower ends of the three-connecting plates, respectively. The side hinge point is located in the middle of the three-connecting plate and faces the central hinge seat. The upper hinge point is hinged to the first hinge seats, the lower hinge point is hinged to the second hinge seats, and the side hinge point is hinged to one side of the central hinge seat.

[0011] Furthermore, the shaft drive assembly also includes a stabilizing rod, which is disposed between the central hinge seat and the mold movable seat and is connected at both ends to the central hinge seat and the mold movable seat.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. This utility model uses a shaft drive assembly to drive the mold movable seat, upper heat insulation plate and upper heating plate assembly to move up and down. The up and down movement process is more stable, and the mold movable seat will not shake during the up and down movement. This ensures that the mold movable seat can still move straight up and down even after long-term and repeated operation. Compared with the cylinder direct drive of the existing dual-station foam molding machine, it is more stable.

[0014] 2. The shaft drive assembly includes a cylinder body, a central hinge seat, two first hinge seats, two three-connecting plates, two second hinge seats, and a stabilizing rod. The cylinder body is connected to the mold movable seat at three points through the central hinge seat, the second hinge seats, the three-connecting plates, and the stabilizing rod. The stabilizing rod is connected to the middle of the mold movable seat and is used to mirror the shaft, the three-connecting plates, and the second hinge seats to ensure that the two sides of the mold movable seat rise and fall synchronously. Attached Figure Description

[0015] Figure 1 This is a partial cross-sectional view of the heating device on an EVA foaming molding machine according to the present invention, taken from the frontal view.

[0016] Figure 2 This is a partial cross-sectional view of the structure of this utility model from a side view angle;

[0017] Figure 3 This is a partial cross-sectional view of the structure of the present invention after the mold is installed, viewed from the front.

[0018] Figure 4 This is a partial cross-sectional view of the structure of the present invention from the side view after the installation mold is installed;

[0019] Figure 5 This is a partially enlarged structural diagram of the position of the shaft drive assembly of this utility model;

[0020] Figure 6 This is a cross-sectional view of the lower heating plate assembly in this utility model.

[0021] The markings in the diagram are: 1. Template fixing seat; 2. Horizontal cylinder; 3. Lower pad plate; 4. Lower heat insulation plate; 5. Lower heating plate assembly; 51. Lower left heating plate; 511. Electric heating rod; 512. Temperature measuring rod; 52. Lower right heating plate; 6. Upper heating plate assembly; 61. Upper left heating plate; 62. Upper right heating plate; 7. Upper heat insulation plate; 8. Mold movable seat; 9. Shaft drive assembly; 91. Cylinder body; 92. Middle hinge seat; 93. First hinge seat; 94. Three connecting plates; 95. Second hinge seat; 96. Stabilizing rod; 10. Upper fixing plate; 101. Guide post. Detailed Implementation

[0022] To make the above-mentioned features and advantages of this utility model more apparent and understandable, specific embodiments are described below in conjunction with the accompanying drawings for detailed explanation.

[0023] like Figures 1-6 As shown, this embodiment provides a heating device for an EVA foaming molding machine, including a template fixing seat 1, a horizontal cylinder 2, a lower pad 3, a lower heat insulation plate 4, a lower heating plate assembly 5, an upper heating plate assembly 6, an upper heat insulation plate 7, a mold movable seat 8, a shaft drive assembly 9, and an upper fixing plate 10.

[0024] The template fixing seat 1, horizontal cylinder 2, lower pad 3, lower heat insulation plate 4, lower heating plate group 5, upper heating plate group 6, upper heat insulation plate 7, mold movable seat 8 and upper fixing plate 10 are arranged sequentially from bottom to top. Two to four guide pillars 101 are arranged between the template fixing seat 1 and the upper fixing plate 10. In this scheme, there are four guide pillars 101. The horizontal cylinder 2, lower pad 3, lower heat insulation plate 4, lower heating plate group 5, upper heating plate group 6, upper heat insulation plate 7 and mold movable seat 8 are provided with through holes that are compatible with the guide pillars 101.

[0025] Template fixing seat 1, lower pad 3, lower heat insulation plate 4 and lower heating plate group 5 are connected in sequence, and upper heat insulation plate 7, mold movable seat 8 and shaft drive assembly 9 are connected in sequence. The above components are connected by connectors, which can be screws and clips.

[0026] There are two heating stations between the lower heating plate group 5 and the upper heating plate group 6.

[0027] Electric heating rods 511 and temperature measuring rods 512 are inserted into the lower heating plate group 5 and the upper heating plate group 6. Specifically, the lower heating plate group 5 includes a lower left heating plate 51 and a lower right heating plate 52, and the upper heating plate group 6 includes an upper left heating plate 61 and an upper right heating plate 62. The lower left heating plate 51, lower right heating plate 52, upper left heating plate 61 and upper right heating plate 62 have the same structure. The lower left heating plate 51 has multiple rows of heating through holes on its side wall. The multiple rows of heating through holes are arranged vertically at intervals. There are two rows of heating through holes, and the number of heating through holes in each row is 3-6. In this scheme, there are 4 heating through holes. Two electric heating rods 511 are inserted into each heating through hole. The electric heating rods 511 are inserted from both ends of the heating through hole. The lower left heating plate 51 has mounting through holes on its side wall. Two temperature measuring rods 512 are inserted into the mounting through holes. The temperature measuring rods 512 are inserted from both ends of the mounting through holes.

[0028] Preferably, the mounting through holes of the lower left heating plate 51 and the lower right heating plate 52 are centered, and the mounting through holes of the upper left heating plate 61 and the upper right heating plate 62 are located in the lower middle position. Since the effective heating area of ​​the upper left heating plate 61 and the upper right heating plate 62 is set in the lower position, the mounting through holes are set in the lower position to ensure the accuracy and effectiveness of temperature measurement.

[0029] The shaft drive assembly 9 includes a cylinder body 91, a central hinge seat 92, two first hinge seats 93, two three-connecting plates 94, two second hinge seats 95, and a stabilizing rod 96. The two first hinge seats 93 are located above the second hinge seats 95 with their hinge ends facing downwards. Specifically, the two first hinge seats 93 are fixedly connected to the lower surface of the upper fixed plate 10, and the two second hinge seats 95 are respectively fixedly connected to both sides of the upper surface of the mold fixing seat with their hinge ends facing upwards. The cylinder body 91 is fixedly mounted on the upper surface of the upper fixed plate 10, and its output end passes through the upper fixed plate 10. In this design, the cylinder body 91 is a hydraulic cylinder. The central hinge seat 92 is connected to the output end of the cylinder body 91 and the hinge ends are located on both sides; the three connecting plates 94 have an upper hinge point, a lower hinge point and a side hinge point. The upper hinge point and the lower hinge point are located at the upper end and the lower end of the three connecting plates 94, respectively. The side hinge point is located in the middle of the three connecting plates 94 and faces the central hinge seat 92. The upper hinge point is hinged to the first hinge seat 93, the lower hinge point is hinged to the second hinge seat 95, and the side hinge point is hinged to one side of the central hinge seat 92. The stabilizing rod 96 is set between the central hinge seat 92 and the mold movable seat 8 and its two ends are connected to the central hinge seat 92 and the mold movable seat 8. The cylinder body 91 is connected to the mold movable seat 8 at three points through the middle hinge seat 92, the second hinge seat 95, the three connecting plates 94 and the stabilizing rod 96. The stabilizing rod 96 is connected to the middle of the mold movable seat 8 and is used to align the shaft. The three connecting plates 94 and the second hinge plate are mirrored to ensure that the two sides of the mold movable seat 8 rise and fall synchronously.

[0030] This solution uses a shaft drive assembly 9 to drive the mold movable seat 8, upper heat insulation plate 7, and upper heating plate group 6 to move up and down. This solves the problem in existing dual-station foaming equipment where a single cylinder 91 drives the mold movable seat 8. Over long periods of operation, the loosening of the connection between the single cylinder 91 and the mold movable seat 8 or the offset of the mold movable seat 8 can cause the mold movable seat 8 to shift and make abnormal noises during its up and down movement.

[0031] The foregoing has shown and described the basic principles and main features of this invention, as well as its advantages. Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this invention. Various changes and modifications can be made to this invention without departing from its spirit and scope. All such changes and modifications fall within the scope of this invention as defined by the appended claims and their equivalents.

Claims

1. A heating device for an EVA foaming molding machine, characterized in that: The device includes a template fixing seat, a lower pad, a lower heat insulation plate, a lower heating plate assembly, an upper heating plate assembly, an upper heat insulation plate, a mold movable seat, and a shaft drive assembly. These components are arranged sequentially from bottom to top. The template fixing seat, lower pad, lower heat insulation plate, lower heating plate assembly, upper heating plate assembly, upper heat insulation plate, mold movable seat, and shaft drive assembly are connected sequentially, as are the upper heat insulation plate, mold movable seat, and shaft drive assembly. Electric heating rods and temperature measuring rods are inserted into the lower and upper heating plate assemblies, and there is a dual heating station between the lower and upper heating plate assemblies.

2. The heating device for an EVA foaming molding machine according to claim 1, characterized in that: The lower heating plate assembly includes a lower left heating plate and a lower right heating plate, and the upper heating plate assembly includes an upper left heating plate and an upper right heating plate. The lower left heating plate, lower right heating plate, upper left heating plate, and upper right heating plate have the same structure.

3. The heating device for an EVA foaming molding machine according to claim 2, characterized in that: The lower left heating plate has multiple rows of heating through holes on its side wall. The multiple rows of heating through holes are arranged at intervals, and there are multiple heating through holes in each row. Two electric heating rods are inserted into each heating through hole.

4. The heating device for an EVA foaming molding machine according to claim 2, characterized in that: The lower left heating plate has a mounting through hole on its side wall, and two temperature measuring rods are inserted into the mounting through hole.

5. The heating device for an EVA foaming molding machine according to claim 4, characterized in that: The mounting holes of the lower left heating plate and the lower right heating plate are centered, while the mounting holes of the upper left heating plate and the upper right heating plate are located in the lower middle position.

6. The heating device for an EVA foaming molding machine according to claim 1, characterized in that: A horizontal cylinder is also provided between the template fixing seat and the lower heat insulation plate.

7. The heating device for an EVA foaming molding machine according to claim 1, characterized in that: The shaft drive assembly includes a cylinder body, a central hinge seat, two first hinge seats, two three-connecting plates, and two second hinge seats. The two first hinge seats are located above the second hinge seats with their hinge ends facing downwards. The two second hinge seats are respectively fixedly connected to both sides of the upper surface of the mold fixing seat with their hinge ends facing upwards. The central hinge seat is connected to the output end of the cylinder body with its hinge ends located on both sides. The three-connecting plates have an upper hinge point, a lower hinge point, and a side hinge point. The upper and lower hinge points are located at the upper and lower ends of the three-connecting plates, respectively. The side hinge point is located in the middle of the three-connecting plate and faces the central hinge seat. The upper hinge point is hinged to the first hinge seats, the lower hinge point is hinged to the second hinge seats, and the side hinge point is hinged to one side of the central hinge seat.

8. The heating device for an EVA foaming molding machine according to claim 7, characterized in that: The shaft drive assembly also includes a stabilizing rod, which is disposed between the central hinge seat and the mold movable seat and has its two ends connected to the central hinge seat and the mold movable seat.

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