CN205364354U - Secondary foaming forming device of expanded polystyrene bead in advance - Google Patents

Abstract

The utility model relates to a secondary foaming molding device for pre-expanded polystyrene beads, comprising a secondary foaming molding device body, two baffles are arranged in parallel inside the secondary foaming molding device body, There is a space between the two baffles and the relative position between the two baffles is fixed, and gaps are evenly staggered on the baffles; the body of the secondary foam molding device is also provided with a water vapor inlet and a water vapor outlet, and the water vapor The outlet is provided with a flow regulating valve, and the water vapor inlet and water vapor outlet are respectively arranged opposite to the baffle. There are gaps on the baffle plate of the utility model, and the water vapor will not directly impact the pre-expanded polystyrene beads to cause uneven foaming; the pre-expanded polystyrene beads undergo secondary foaming at the temperature of water vapor. After foaming, the volume increases, the surface of the beads melts, and they are formed by extrusion and adhesion of two baffles. The baffle can slide along the sliding guide rail, so that the secondary foam molding product can be taken out from the secondary foam molding device.

Description

A secondary foam molding device for pre-expanded polystyrene beads

technical field

The utility model relates to a secondary foam molding device for pre-expanded polystyrene beads, which belongs to the technical field of chemical equipment.

Background technique

Polystyrene (Polystyrene, abbreviated as PS) refers to a polymer synthesized by free radical addition polymerization of styrene monomer, including ordinary polystyrene, expanded polystyrene (EPS), high impact polystyrene (HIPS) ) and syndiotactic polystyrene (SPS). Expanded polystyrene (EPS) has the advantages of low relative density (1.05g/cm ³ ), low thermal conductivity, low water absorption, shock and vibration resistance, heat insulation, sound insulation, moisture resistance, vibration reduction, and excellent dielectric properties. Widely used in shockproof packaging materials for mechanical equipment, instruments, household appliances, handicrafts and other fragile and valuable products, as well as fast food packaging.

The molding process of expanded polystyrene (EPS) is mainly carried out by placing the expandable polystyrene directly in the steam. Generally, the reaction is completed by continuous mixing of beads and steam in the stirred tank. The reaction equipment (such as pre-foaming Machine) is to keep the external pressure and normal pressure open, and make the foamed beads overflow from the top. After foaming, the beads need to be cured so that air is gradually incorporated into the cells. The secondary foaming process is mainly to put the mature pre-expanded beads into a mold with a specific cavity for secondary foaming. For small and complex structure products, Venturi tube action equipment (such as filling gun) is used to blow the beads into the mold cavity with the help of air flow. Large products can fill the mold cavity according to their own gravity. The mold cavity filled with pellets is sealed and heated, the beads are heated and softened, the cells are expanded, and the beads expand to fill the gaps between each other, and bonded into a uniform foam.

Chinese patent document CN203680639U (Application No.: 201420023156.7) is an expanded polystyrene foaming machine, which includes a foaming device for the first time, and an injection pipe is provided on the foaming device for the first time. The outlet is provided with a second foam molding box; the second foam molding box includes a feed port connected to the outlet of the first foaming device, and the feed port communicates with the inner cavity of the molding box. One end of the second foam molding box body is provided with a hinged door, and the other end is provided with a top plate, which is connected with a hydraulic cylinder of the hydraulic system. However, the structure of the expanded polystyrene foaming machine is complicated, and the water vapor directly impacts the pre-expanded polystyrene beads during secondary foaming, which easily causes uneven foaming.

Contents of the invention

Aiming at the deficiencies of the prior art, the utility model provides a secondary foam molding device for pre-foamed polystyrene beads.

The technical scheme of the utility model is as follows:

A secondary foam molding device for pre-expanded polystyrene beads, comprising a secondary foam molding device body, two baffles are arranged in parallel inside the secondary foam molding device body, and two baffles There is a space between them and the relative position between the two baffles is fixed, the baffles are evenly staggered with gaps; the body of the secondary foam molding device is also provided with a water vapor inlet and a water vapor outlet, The water vapor outlet is provided with a flow regulating valve, and the water vapor inlet and water vapor outlet are respectively arranged opposite to the baffle.

According to the present invention, preferably, the body of the secondary foam molding device is a square structure, more preferably a cuboid structure.

According to the present invention, preferably, the part of the main body of the secondary foam molding device that is in contact with the baffle is provided with a sliding guide rail.

According to the present invention, preferably, the body of the secondary foam molding device is also provided with a pressure gauge.

When the secondary foam molding device of the pre-expanded polystyrene beads of the present utility model is used, the pre-expanded polystyrene beads are placed between two baffles, and water vapor is introduced from the water vapor inlet. After the first foaming, it is discharged from the water vapor outlet. Because there is a slit on the baffle, water vapor enters from the slit and heats the pre-expanded polystyrene beads for secondary foaming; moreover, there is no direct impact on the pre-expanded polystyrene beads to cause foaming Inhomogeneous; pre-expanded polystyrene beads undergo secondary foaming at the temperature of water vapor, and the volume increases, the surface of the beads melts, and is formed by extrusion and adhesion of two baffles. The pressure in the secondary foam molding device can be read through the pressure gauge, and the water vapor outlet is equipped with a flow regulating valve. According to the pressure data of the pressure gauge, the pressure inside the secondary foam molding device can be adjusted in real time through the flow regulating valve to control the steam flow. temperature. After the secondary foaming is completed, since the baffle can slide along the sliding guide rail, it is convenient to take out the secondary foaming molding product from the secondary foaming molding device.

The beneficial effects of the utility model are as follows:

In the utility model, since there are gaps on the baffle, the water vapor will not directly impact the pre-expanded polystyrene beads to cause uneven foaming; the pre-expanded polystyrene beads undergo secondary After foaming, the volume increases, the surface of the bead melts, and is formed by extrusion and adhesion of two baffles. After the secondary foaming is completed, since the baffle can slide along the sliding guide rail, it is convenient to take out the secondary foaming molding product from the secondary foaming molding device.

Description of drawings

Fig. 1 is a structural schematic diagram of a secondary foam molding device for pre-expanded polystyrene beads in Example 1 of the present utility model.

Among them: 1. The main body of the secondary foam molding device, 2. The baffle, 3. The water vapor inlet, 4. The water vapor outlet, 5. The sliding guide rail, 6. The pressure gauge, 7. The flow regulating valve.

detailed description

The present invention will be further described below through specific embodiments in conjunction with the accompanying drawings, but is not limited thereto.

Example 1

A secondary foam molding device for pre-expanded polystyrene beads, including a secondary foam molding device body 1, and two baffles 2, 2 are arranged in parallel inside the secondary foam molding device body 1 There is a space between the two baffles 2 and the relative position between the two baffles 2 is fixed, the baffles 2 are uniformly staggered with gaps; the secondary foam molding device body 1 is also provided with water A steam inlet 3 and a steam outlet 4, the steam outlet 4 is provided with a flow regulating valve 7, and the steam inlet 3 and the steam outlet 4 are respectively arranged opposite to the baffle plate 2;

The main body 1 of the secondary foam molding device is a cuboid structure;

The part of the body 1 of the secondary foam molding device that is in contact with the baffle 2 is provided with a sliding guide rail 5, and the baffle 2 can slide along the sliding guide rail 5;

The main body 1 of the secondary foam molding device is provided with a pressure gauge 6 .

When the secondary foam molding device of the pre-expanded polystyrene beads of the present embodiment is used, the pre-expanded polystyrene beads are placed between two baffles 2, and water vapor is introduced from the water vapor inlet 3, After secondary foaming, it is discharged from the water vapor outlet 4. Because the baffle plate 2 is provided with a gap, water vapor enters from the gap and heats the pre-expanded polystyrene beads for secondary foaming; moreover, the pre-expanded polystyrene beads will not be directly impacted to cause foaming. The foam is not uniform; the pre-expanded polystyrene beads are expanded after secondary foaming at the temperature of water vapor, the surface of the beads is melted, and they are formed by extrusion and adhesion of two baffles 2 . The pressure in the secondary foam molding device can be read through the pressure gauge 6, and the water vapor outlet 4 is provided with a flow regulating valve 7. According to the pressure data of the pressure gauge 6, the flow regulating valve 7 can be used to adjust the internal pressure of the secondary foam molding device in real time. pressure to control the steam temperature.

After the secondary foaming is completed, since the baffle plate 2 can slide along the sliding guide rail 5, it is convenient to take out the secondary foaming molding product from the secondary foaming molding device.

Claims (5)

1. a secondary foam molding device of pre-expanded polystyrene beads, characterized in that, the secondary foam molding device comprises a secondary foam molding device body, said secondary foam molding device body There are two baffles arranged in parallel inside, a space is provided between the two baffles and the relative position between the two baffles is fixed, and gaps are uniformly interlaced on the said baffles; said secondary foam molding The device body is also provided with a water vapor inlet and a water vapor outlet, and the water vapor outlet is provided with a flow regulating valve, and the water vapor inlet and water vapor outlet are respectively arranged opposite to the baffle. 2 . The secondary foam molding device for pre-expanded polystyrene beads according to claim 1 , wherein the main body of the secondary foam molding device is a square structure. 3 . 3. The secondary foam molding device for pre-expanded polystyrene beads according to claim 2, characterized in that the body of the secondary foam molding device is a cuboid structure. 4. The secondary foam molding device of pre-expanded polystyrene beads according to claim 1, characterized in that, the part in contact with the baffle plate on the body of the secondary foam molding device is provided with a sliding guide rail . 5. The secondary foam molding device for pre-expanded polystyrene beads according to claim 1, characterized in that a pressure gauge is also arranged on the body of the secondary foam molding device.