Permanent magnet preset foaming sponge integrated forming system

Abstract

The invention relates to the technical field of sponge foaming production, and discloses a permanent magnet preset foaming sponge integrated forming system which comprises an automatic magnet falling device, a low-pressure injection molding device, a foaming forming mold, negative pressure forming equipment and a central control system. Mainly relates to an automatic integrated forming method for permanent magnet preset foaming sponge. Through cooperation of the foaming forming lower mold base, the automatic magnet falling device, the low-pressure injection molding device and the foaming forming upper mold base, continuous and automatic feeding and discharging of materials to be machined are conveniently achieved, and the high efficiency and continuity of permanent magnet foaming sponge production are improved. Through the positioning magnetic block which is arranged on the foaming forming lower die base and corresponds to the magnetic falling cylinder in the automatic magnetic falling device in position, the accuracy of the position and the number of the permanent magnet in the automatic magnetic falling device during production of the preset foaming sponge is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of sponge foaming production, and in particular to a permanent magnet pre-set foam sponge integrated molding system. Background Art

[0002] As a foamed porous material, foamed sponge has excellent foaming molding speed and convenience in shaping various shapes. At the same time, due to the good support, air permeability and comfort of foamed sponge, it has been widely used in the field of home life. With the improvement of living standards, people increasingly pursue the multi-functionality of products to meet diverse product usage requirements. Especially in the home field, the consumption demand for magnetic functional materials and foamed sponge molded products is growing. As a magnetic solid material, permanent magnets have different magnetic field intensities and various shapes, specifically, they will adsorb to external steel equipment, thus causing various inconveniences in the production process of permanent magnet products. In current existing home products, most permanent magnet foamed sponge products fix the permanent magnet on the surface of the foamed sponge by means of glue adhesives, sewing processes or snap fasteners. This preparation method is not only time-consuming and laborious, but also prone to the detachment of the permanent magnet from the foamed sponge, resulting in product quality problems and causing huge economic losses to consumers and enterprises. Summary of the Invention

[0003] The problem to be solved by the present invention is to propose an innovative solution, especially a new process without using glue adhesives, aiming at the shortcomings in the above-mentioned prior art.

[0004] To solve the above problems, the following solution is adopted in the present invention: A permanent magnet pre-set foam sponge integrated molding system, characterized in that the integrated molding system includes a conveying device, an automatic magnetic dropping device, a low-pressure injection molding device, a foaming molding die, a negative pressure forming device and a central control system; the central control system is used to control the conveying device, the automatic magnetic dropping device, the low-pressure injection molding device, the foaming molding die, and the negative pressure forming device; the automatic magnetic dropping device, the low-pressure injection molding device and the foaming molding die are sequentially arranged above the conveying device along the material advancing direction; the negative pressure forming device is connected to the foaming molding die for assisting in foaming molding; the foaming molding die is composed of a second vertical movement component, an upper die base and a lower die base; the upper die base is fixedly connected to the second vertical movement component; the lower die base is arranged on the conveying device and is driven by the conveying device to sequentially pass under the automatic magnetic dropping device, the low-pressure injection molding device and the upper die base; the low-pressure injection molding device is used to inject foaming materials into the lower die base. The automatic demagnetization device includes a first vertical movement component and a demagnetization bin, and the demagnetization bin is fixedly arranged below the first vertical movement component; a magnet bin group, a stepping device and a push rod component are arranged in the demagnetization bin; the stepping device is fixedly arranged at the top in the demagnetization bin; the magnet bin group consists of a plurality of independent magnet bins, a fixing plate and a limiting rod; the independent magnet bins are fixedly arranged on the fixing plate, and the fixing plate is fixedly hoisted in the demagnetization bin through the limiting rod, below the stepping device, and the independent magnet bins are used for placing permanent magnets; the push rod component consists of a plurality of independent push rods matching the independent magnet bins and a movable plate; the independent push rods are fixedly arranged on the lower surface of the movable plate and inserted into the independent magnet bins; the movable plate is sleeved on the limiting rod, and its upper surface is fixedly connected with the movable rod of the stepping device, and the movable plate can move up and down along the limiting rod under the drive of the stepping device. A positioning carrier platform matching the independent magnet bin is arranged in the lower die base; the positioning carrier platform is made of a magnetic material, and the magnetic force level thereof is greater than that of the permanent magnet in the independent magnet bin; the positioning carrier platform is of a columnar structure, and the cross-sectional area thereof is smaller than the cross-sectional area of the permanent magnet.

[0005] Further, in the permanent magnet pre-set foaming sponge integrated forming system, the middle part of the independent magnet bin is of a tubular structure, the upper and lower ends are two symmetrically arranged arc-shaped clamping plates, and clamping plate wings are arranged at the ends of the arc-shaped clamping plates, and flexible springs are arranged on the clamping plate wings to connect the two symmetrically arranged arc-shaped clamping plates.

[0006] Further, in the permanent magnet pre-set foaming sponge integrated forming system, a soft push head is arranged at the bottom of the independent push rod, and both the independent push rod and the soft push head are made of non-magnetic materials.

[0007] Further, in the permanent magnet pre-set foaming sponge integrated forming system, the negative pressure forming device is connected with the upper die base through a pipeline, and an overflow tank is arranged on the pipeline.

[0008] Further, in the permanent magnet pre-set foaming sponge integrated forming system, isolation net positioning platforms having the same height as the positioning carrier platform and isolation net positioning pressing sheets matching the isolation net positioning platforms are arranged on both sides of the positioning carrier platform in the lower die base for laying an isolation net above the positioning carrier platform.

[0009] Further, in the permanent magnet pre-set foaming sponge integrated forming system, the height of the positioning carrier platform is 1 / 10 to 1 / 2 of the thickness of the foaming sponge.

[0010] Furthermore, for the above-mentioned one-piece forming system of pre-placed permanent magnets in foaming sponge, it is characterized in that the system further includes a permanent magnet detection device, which is arranged between the automatic magnet dropping device and the low-pressure injection molding device; the permanent magnet detection device is a photographing detection device, and it detects by photographing whether there is exactly one permanent magnet on each positioning carrier table.

[0011] Furthermore, for the above-mentioned one-piece forming system of pre-placed permanent magnets in foaming sponge, it is characterized in that a correction track is provided behind the permanent magnet detection device. The correction track is connected to one side of the conveying device, but the tooling carrying the lower mold base cannot be directly transferred into the correction track; a push rod device is provided at a position on the other side of the conveying device that matches the correction track. The push rod device is controlled by the photographing detection device and is used to push the tooling that fails to pass the photographing detection device out of the conveying device and into the correction track. An artificial intervention station is arranged on the correction track. By manually supplementing or removing permanent magnets, there is exactly one permanent magnet on each positioning carrier table, and then it returns to the conveying device through the correction track and enters the low-pressure injection molding device. The correction track can be designed as an arc structure, and both ends of it are connected to the conveying device, which is convenient for the tooling after manual correction to return to the conveying device.

[0012] The technical effects of the present invention are as follows: Through the cooperation of the foaming forming lower mold base, the automatic magnet dropping device, the low-pressure injection molding device and the foaming forming upper mold base, it is convenient to realize the continuous automatic loading and unloading of the materials to be processed, and improve the efficiency and continuity of the production of permanent magnet foaming sponge. Through the positioning carrier table arranged at the corresponding position of the magnet dropping cylinder in the automatic magnet dropping device on the foaming forming lower mold base, it is convenient to ensure the accuracy of the position and quantity during the production of the permanent magnet pre-placed foaming sponge.

[0013] Arc-shaped clamping plates are symmetrically arranged at the upper and lower ends of each independent magnet bin. They are pulled and contracted by flexible springs, and multiple permanent magnets can be stored in its internal space. Independent push rods that are matched with the independent magnet bins one by one are uniformly installed under the movable plate and are driven by a stepping device. The movable plate is sleeved on the limit rods around its perimeter, ensuring that the moving distance of each independent push rod is the same each time. The flexible spring gives the symmetrically arranged arc-shaped clamping plates a clamping force, and together with the positioning carrier table with a magnetic force level greater than that of the permanent magnet, it ensures that the permanent magnet can be smoothly separated from the independent magnet bin and will not bring out the permanent magnets that have not been pushed out of the independent magnet bin.

[0014] The positioning stage is preferably a cylindrical structure, and its cross-sectional area is smaller than that of the permanent magnet. After the foam molding is completed, the diameter of the through-hole left by the positioning stage is smaller than the diameter of the permanent magnet, so that the permanent magnet will not be pulled out of the foam sponge during demolding. To ensure that the permanent magnet stays in the foam sponge, a separation net positioning stage and a separation net positioning pressing piece are arranged outside the positioning stage for laying a separation net above the positioning stage. After the foam molding is completed, the separation net stays in the foam sponge to strengthen the bonding force between the foam sponge and the permanent magnet. The separation net has uniform holes in the middle, which can ensure the uniform flow of the sponge material in the mold. The separation net and the permanent magnet are shaped and fixed in the sponge body during the foam molding of the sponge, and the separation net facilitates the separation of the permanent magnet and the positioning stage.

[0015] This design adds a set of negative pressure forming equipment to the foam molding die. The negative pressure forming equipment is connected to the upper mold base, and the air inside is extracted after the upper mold base and the lower mold base are closed, which can accelerate the formation of the foam sponge. At the same time, an overflow tank is set on the connecting pipeline to prevent the foam material from flowing into the negative pressure forming equipment.

[0016] This design uses an integral molding process to combine the permanent magnet with the sponge material. The permanent magnet includes but is not limited to magnetic particles, magnetic strips, magnetic blocks, special-shaped magnets, etc., which greatly improves the bonding strength and aesthetics between the permanent magnet and the sponge, especially solves the difficult problem of fixing special-shaped magnets in the sponge foam material.

[0017] On the basis of the original manual integral molding and foaming, a complete set of devices for automatic magnetic dropping, low-pressure molding, and foam molding is developed, realizing the automated production from magnetic discharging to foam molding. It improves the problems of low efficiency and unstable quality in manual magnetic discharging, and greatly improves the production efficiency of materials. Specifically: ① An automatic magnetic dropping device is provided with a magnetic dropping cylinder with a flexible spring. Through the advancement of the stepping component and the cooperation with the positioning magnet block in the lower mold base, the precise positioning and placement of the permanent magnet are realized; ② The low-pressure injection molding device is equipped with a meter, which can quantitatively and evenly inject the foam material into the mold; ③ An exhaust hole connected to the negative pressure forming equipment is arranged on the upper mold base of the foam molding die, so as to timely discharge the gas generated during the foam molding process and avoid forming large irregular holes inside or on the surface of the foam body. Description of the Drawings

[0018] Figure 1 Schematic diagram of the integrated molding system for pre-placing a permanent magnet in a foam sponge.

[0019] Figure 2 Schematic diagram of the automatic magnetic dropping device.

[0020] Figure 3 Schematic diagram of a set of stepping devices and push rod components.

[0021] Figure 4 is Figure 3 The enlarged view of part A in

[0022] Figure 5 is the schematic diagram of the lower die holder.

[0023] Figure 6 is Figure 5 The enlarged view of part B in

[0024] Wherein, 1 is a conveying device, 2 is an automatic demagnetizing device, 3 is a low-pressure injection molding device, 4 is a foaming mold, 5 is a negative pressure forming device, 6 is a central control system, 7 is a permanent magnet, 21 is a first vertical movement component, 22 is a demagnetizing bin, 23 is a feeding device, 24 is a push rod component, 25 is a magnet bin group, 241 is a movable plate, 242 is an independent push rod, 243 is a soft push head, 251 is an independent magnet bin, 252 is a fixing plate, 253 is a limiting rod, 2511 is an arc-shaped clamping plate, 2512 is a clamping plate wing, 2513 is a flexible spring, 41 is a second vertical movement component, 42 is an upper die holder, 43 is a lower die holder, 431 is an isolation net positioning carrier, 432 is an isolation net positioning pressing piece, 433 is an isolation net, 434 is a positioning carrier, and 51 is an overflow tank. Specific embodiments

[0025] The present invention will be further described in detail below with reference to the accompanying drawings.

[0026] Embodiment: A permanent magnet pre-set foamed sponge integrated molding system, the integrated molding system includes a conveying device, an automatic demagnetizing device, a low-pressure injection molding device, a foaming mold, a negative pressure forming device and a central control system; the central control system is used to control the conveying device, the automatic demagnetizing device, the low-pressure injection molding device, the foaming mold and the negative pressure forming device; the automatic demagnetizing device, the low-pressure injection molding device and the foaming mold are sequentially arranged above the conveying device along the material advancing direction; the negative pressure forming device is connected to the foaming mold and is used to assist in foaming molding; the foaming mold is composed of a second vertical movement component, an upper die holder and a lower die holder; the upper die holder is fixedly connected to the second vertical movement component; the lower die holder is arranged on the conveying device and is driven by the conveying device to sequentially pass under the automatic demagnetizing device, the low-pressure injection molding device and the upper die holder; the low-pressure injection molding device is used to inject foaming materials into the lower die holder.

[0027] The automatic demagnetization device includes a first vertical motion component and a demagnetization bin, and the demagnetization bin is fixedly arranged below the first vertical motion component; a magnet bin group, a stepping device and a push rod component are arranged in the demagnetization bin; the stepping device is fixedly arranged at the top in the demagnetization bin; the magnet bin group consists of a plurality of independent magnet bins, a fixing plate and a limiting rod; the independent magnet bins are fixedly arranged on the fixing plate, and the fixing plate is fixedly hoisted in the demagnetization bin through the limiting rod, located below the stepping device, and the independent magnet bins are used for placing permanent magnets; the push rod component consists of a plurality of independent push rods matching the independent magnet bins and a movable plate; the independent push rods are fixedly arranged on the lower surface of the movable plate and inserted into the independent magnet bins; the movable plate is sleeved on the limiting rod, and its upper surface is fixedly connected with the movable rod of the stepping device, and the movable plate can move up and down along the limiting rod under the drive of the stepping device; a positioning carrier table matching the independent magnet bins is arranged in the lower die base; the positioning carrier table is made of a magnetic material, and its magnetic force level is greater than that of the permanent magnet in the independent magnet bin; the positioning carrier table is of a columnar structure, and its cross-sectional area is smaller than that of the permanent magnet.

[0028] The middle part of the independent magnet bin is of a tubular structure, the upper and lower ends are two symmetrically arranged arc-shaped clamping plates, and clamping plate wings are arranged at the ends of the arc-shaped clamping plates, and flexible springs are arranged on the clamping plate wings to connect the two symmetrically arranged arc-shaped clamping plates. A soft push head is arranged at the bottom of the independent push rod, and both the independent push rod and the soft push head are made of non-magnetic materials. The negative pressure forming device is connected with the upper die base through a pipeline, and an overflow tank is arranged on the pipeline. Isolation net positioning platforms with the same height as the positioning carrier table and isolation net positioning pressing pieces matching the isolation net positioning platforms are arranged on both sides of the positioning carrier table in the lower die base for laying an isolation net above the positioning carrier table. The height of the positioning carrier table is 1 / 10 of the thickness of the foaming sponge.

[0029] During use, first spray a release agent into the upper die base and the lower die base, then install an isolation net in the lower die base, and the lower die base is transferred to the lower part of the automatic demagnetization device by a conveying device and positioned by an infrared sensor. Then the first vertical motion component pushes the demagnetization bin above the lower die base, so that the independent magnet bin is spaced from the positioning carrier table by a distance equal to the thickness of a permanent magnet. Then the independent push rods respectively matching the independent magnet bins move downward under the action of the stepping device, and each time they advance a distance equal to the thickness of the permanent magnet, the lowermost permanent magnet in the independent magnet bin is pushed out of the independent magnet bin. Under the attraction of the positioning carrier table, the permanent magnet is magnetically attracted to the positioning carrier table. Then the first vertical motion component lifts the demagnetization bin, and during the lifting process, the lowermost permanent magnet is separated from the independent magnet bin. The conveying device drives the lower die base to continue to move forward, arrives below the low-pressure injection molding device, injects foaming materials into the lower die base, and after completion, is transferred to below the foaming molding die by the conveying device and is clamped with the upper die base. Then start the negative pressure forming device to extract the air in the die and accelerate the foaming molding.

Claims

1. A permanent magnet pre-set foaming sponge integrated molding system, characterized in that, The one-piece forming system includes a conveying device, an automatic magnetic dropping device, a low-pressure injection molding device, a foam molding die, a negative pressure forming device, and a central control system; the central control system is used to control the conveying device, the automatic magnetic dropping device, the low-pressure injection molding device, the foam molding die, and the negative pressure forming device; the automatic magnetic dropping device, the low-pressure injection molding device, and the foam molding die are sequentially arranged above the conveying device along the forward direction of the material; the negative pressure forming device is connected to the foam molding die and is used to assist in foam molding; the foam molding die is composed of a second vertical movement component, an upper mold base, and a lower mold base; the upper mold base is fixedly connected to the second vertical movement component; the lower mold base is arranged on the conveying device and is driven by the conveying device to sequentially pass below the automatic magnetic dropping device, the low-pressure injection molding device, and the upper mold base; the low-pressure injection molding device is used to inject foam materials into the lower mold base. The automatic magnetic dropping device includes a first vertical movement component and a magnetic dropping bin, and the magnetic dropping bin is fixedly arranged below the first vertical movement component; a magnet bin group, a stepping device, and a push rod component are arranged in the magnetic dropping bin; the stepping device is fixedly arranged at the top in the magnetic dropping bin; the magnet bin group is composed of a plurality of independent magnet bins, a fixing plate, and a limiting rod; the independent magnet bins are fixedly arranged on the fixing plate, and the fixing plate is fixedly hoisted in the magnetic dropping bin through the limiting rod and is located below the stepping device, and the independent magnet bins are used to place permanent magnets; the push rod component is composed of a plurality of independent push rods matching the independent magnet bins and a movable plate; the independent push rods are fixedly arranged on the lower surface of the movable plate and are inserted into the independent magnet bins; the movable plate is sleeved on the limiting rod, and its upper surface is fixedly connected to the movable rod of the stepping device, and the movable plate can move up and down along the limiting rod under the drive of the stepping device. A positioning carrier platform matching the independent magnet bin is arranged in the lower mold base; the positioning carrier platform is made of a magnetic material, and its magnetic force level is greater than that of the permanent magnet in the independent magnet bin; the positioning carrier platform is of a columnar structure, and its cross-sectional area is smaller than that of the permanent magnet.

2. The one-piece forming system of a permanent magnet pre-set foamed sponge according to claim 1, characterized in that, The middle part of the independent magnet bin is of a tubular structure, and the upper and lower ends are two symmetrically arranged arc-shaped clamping plates, and clamping plate wings are arranged at the ends of the arc-shaped clamping plates, and flexible springs are arranged on the clamping plate wings to connect the two symmetrically arranged arc-shaped clamping plates.

3. The one-piece forming system of a permanent magnet pre-set foamed sponge according to claim 1, characterized in that A soft push head is arranged at the bottom of the independent push rod, and both the independent push rod and the soft push head are made of non-magnetic materials.

4. The one-piece forming system of a permanent magnet pre-set foaming sponge according to claim 1, characterized in that, The negative pressure forming device is connected to the upper mold base through a pipeline, and an overflow tank is arranged on the pipeline.

5. The one-piece forming system of a permanent magnet pre-set foamed sponge according to claim 1, wherein, Isolation net positioning platforms with the same height as the positioning carrier platform and isolation net positioning pressing pieces matching the isolation net positioning platforms are arranged on both sides of the positioning carrier platform in the lower mold base for laying an isolation net above the positioning carrier platform.

6. The one-piece forming system of a permanent magnet pre-set foamed sponge according to claim 1, wherein The height of the positioning carrier platform is 1 / 10 to 1 / 2 of the thickness of the foam sponge.

7. The one-piece forming system of a permanent magnet pre-set foaming sponge according to claim 1, wherein, The system further includes a permanent magnet detection device, which is arranged between the automatic magnetic dropping device and the low-pressure injection molding device; the permanent magnet detection device is a photographing detection device, and it detects whether there is exactly one permanent magnet on each positioning carrier platform through photographing.

8. The one-piece forming system of a permanent magnet pre-set foamed sponge according to claim 7, characterized in that, A correction track is provided behind the permanent magnet detection device. The correction track is connected to one side of the conveying device, but the tooling carrying the lower die base cannot be directly transferred into the correction track. A push rod device is provided at a position on the other side of the conveying device that matches the correction track. The push rod device is controlled by the photographing detection device and is used to push the tooling that has not passed the photographing detection device out of the conveying device and into the correction track.

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