CN104118087B - A production process and equipment for high-efficiency and energy-saving foam plastics - Google Patents

Abstract

The present invention discloses a production process and equipment for high-efficiency and energy-saving foam plastics. The production process includes the following steps: ① After closing a movable mold and a static mold for shaping foam plastics, a feeder is used to inject foaming material into the cavity between the movable mold and the static mold, wherein an upper air chamber and a lower air chamber are formed on the upper and lower sides of the cavity, respectively, and the upper and lower air chambers are both connected to the cavity; ② Using steam channels connected to the upper and lower air chambers, respectively, high-pressure steam is introduced into the upper and lower air chambers and the pressure is maintained for a period of time, so that the high-pressure steam in the upper and lower air chambers can simultaneously penetrate into the foaming material from the upper and lower sides of the cavity; ③ After cooling, the finished foam plastic is obtained. Compared with the prior art, the present invention can ensure uniform foaming of the entire foam plastic when molding thicker foam plastics. In addition, the present invention can be switched to traditional equipment at any time to be used for molding ordinary foam plastics, which is very convenient.

Description

A production process and equipment for high-efficiency and energy-saving foam plastics

technical field

The invention relates to the field of foamed plastics manufacturing, and more specifically relates to a production process and equipment for high-efficiency and energy-saving foamed plastics.

Background technique

The applicant once filed a Chinese invention patent application 201110302794.3 with the Patent Office of the State Intellectual Property Office of China on September 30, 2011, which relates to a production process and equipment for thermal insulation bricks. The production process includes the following steps:

①. Put the porous brick into the container, and fill the brick hole or groove on the porous brick that needs to be filled with thermal insulation material with polystyrene foam particles; the position where the porous brick is set in the container must meet the following conditions: A: Make the part where the polystyrene foam particles are set on the porous brick face the first steam inlet on the container; B: Let the first steam outlet and the first steam inlet on the container be separately arranged on both sides of the porous brick;

②. Water vapor is introduced into the first steam inlet, and the water vapor gradually transitions from one side of the porous brick to the other side under the push of air pressure and is discharged from the first steam outlet;

③. Stop the ventilation when the polystyrene foam particles are connected to the brick holes or grooves and solidify, and take out the molded insulation bricks from the container.

The production process also includes a reverse ventilation step between step ② and step ③, that is, the container is also provided with a second steam inlet and a second steam outlet, the second steam inlet is located on the same side as the first steam outlet, the The second steam outlet is on the same side as the first steam inlet, and the second steam inlet is facing the position where polystyrene foam particles are arranged on the porous brick; the reverse ventilation step is to close the first steam inlet and the first steam inlet. Under the conditions of the steam outlet, water vapor is introduced into the second steam inlet and gradually transitions to the other side to be discharged from the second steam outlet.

Compared with the traditional technology, the above-mentioned patent does have a certain degree of progress. After continuous research and development, the applicant found that the above-mentioned patented technology still has the following defects in the process of use: as the steam and polystyrene foam particles With gradual contact, the heat in the steam will gradually decrease (whether or not the reverse ventilation step is included), especially in the case of a thicker insulation layer in the insulation brick, so it is easy to have obvious defects such as uneven foaming.

In view of this, the applicant conducted in-depth research on the above-mentioned defects of the prior art, and thus this case arose.

Contents of the invention

The first object of the present invention is to provide a high-efficiency and energy-saving foam production process to solve the problem of uneven foaming in the prior art when the foam is relatively thick.

In order to achieve the above object, the solution of the present invention is:

A production process for high-efficiency and energy-saving foamed plastics, comprising the steps of:

① After the movable mold and static mold used to shape the foam are closed, use the feeder to inject foam material into the cavity between the movable mold and the static mold. The upper and lower sides of the cavity are respectively formed with upper and lower sides. Chamber and lower air chamber, the upper air chamber and the lower air chamber are connected with the cavity;

②Use the steam channels connected with the upper air chamber and the lower air chamber respectively to feed high-pressure steam into the upper air chamber and the lower air chamber and maintain the pressure for a period of time, so that the high-pressure steam in the upper air chamber and the lower air chamber can flow from The upper and lower sides of the cavity penetrate into the foam material at the same time;

③ After cooling, the finished foam plastic is obtained.

Further, in step ③, after using cooling water to cool the movable mold, static mold and semi-finished product to 80-100°C, stop the water, and also include adopting a vacuum method to simultaneously cool the mold from the upper air chamber and the lower air chamber. Steps for water pumping.

Furthermore, the temperature of the said cooling water is 50-70 degreeC.

Furthermore, the temperature of the said cooling water is 60 degreeC.

The second object of the present invention is to provide a production equipment for high-efficiency and energy-saving foamed plastics, including a frame, a movable mold, a static mold, a feeder, a steam generating device, an upper air chamber and a lower air chamber, the movable mold and the static mold A mold cavity is formed between them, and the feeder communicates with the mold cavity through the feeding pipeline. The upper air chamber and the lower air chamber are respectively arranged on the upper and lower sides of the mold cavity and communicate with the mold cavity. A first steam passage communicated with the upper air chamber and a second steam passage communicated with the lower air chamber are formed, the steam generating device is connected with a main steam pipeline, and the main steam pipeline communicates with the upper air chamber through the first steam passage , the second steam channel is also connected with the exhaust pipeline; wherein, the production equipment also includes a secondary steam pipeline connected with the main steam pipeline, the secondary steam pipeline is connected with the exhaust pipeline, and the secondary steam pipeline is provided with a second A valve, the exhaust pipe is also provided with a second valve.

Further, the secondary steam pipeline is also provided with a third valve, the first valve is set at a position close to the main steam pipeline, and the third valve is set at a position close to the exhaust pipeline.

Further, the end of the exhaust pipe is also connected with vacuum equipment, and the main steam pipe is also provided with a fourth valve, which is located between the steam generating device and the secondary steam pipe to open or close the main steam pipe.

Further, both the feeder and the static mold are fixed on the frame, the feeding pipeline is fixedly connected with the static mold, and the feeder goes to the cavity between the movable mold and the static mold after the static mold and the movable mold are closed. Inject the foam material.

Furthermore, the high-efficiency and energy-saving foam production equipment also includes an integrated valve, which is closely attached to the static mold, and has a unique steam inlet channel and at least one steam outlet channel, and the steam inlet channel and The main steam pipes communicate with each other, one of the at least one steam discharge channel communicates with the steam discharge channel, and one of the at least one steam discharge channel communicates with the steam inlet of the static mold.

After adopting the above structure, the present invention relates to a production process and equipment of high-efficiency and energy-saving foamed plastics. By feeding high-pressure steam into the upper air chamber and the lower air chamber respectively and maintaining the pressure for a period of time, the foamed material can be made to move up and down. At the same time, the side is filled with a large amount of high-pressure steam, so as to ensure that the thicker foam material can be foamed evenly on the upper and lower sides, that is, it has the effect of good fusing degree on the upper and lower sides.

Compared with the prior art, the present invention can also ensure the foaming of the entire foam evenly when forming thicker foam plastics. In addition, the present invention can also be switched to traditional equipment at any time for forming ordinary foam plastics ,Very convenient.

Description of drawings

Fig. 1 is a structural schematic diagram of a production equipment for high-efficiency and energy-saving foam plastics according to the present invention.

Fig. 2 is a schematic diagram of the steam flow when the production equipment of the present invention relates to a kind of high-efficiency and energy-saving foamed plastics when producing thicker foamed plastics;

Fig. 3 is a schematic diagram of the present invention relating to a production equipment of high-efficiency and energy-saving foamed plastics when the cooling water is quickly drawn out by vacuum equipment;

Fig. 4 is a schematic diagram of steam flow when the production equipment of the present invention relates to a high-efficiency and energy-saving foam plastic used to produce ordinary foam plastic.

In the picture:

Rack-1; First Steam Channel-11; Second Steam Channel-12;

Moving mold-2; Static mold-3; Feeder-4;

Material delivery pipeline-41; steam generating device-5; main steam pipeline-51;

Exhaust pipe-52; auxiliary steam pipe-53; first valve-54;

The second valve-55; the third valve-56; the fourth valve-57;

Upper air chamber-61; lower air chamber-62; vacuum equipment-7.

detailed description

In order to further explain the technical solution of the present invention, the present invention will be described in detail below through specific examples.

As shown in Figure 1 and Figure 2, the present invention relates to a production process of high-efficiency and energy-saving foamed plastics, comprising the following steps:

① After closing the movable mold 2 and the static mold 3 for shaping the foamed plastic, use the feeder 4 to inject foam material into the cavity between the movable mold 2 and the static mold 3. The upper and lower sides of the cavity An upper air chamber 61 and a lower air chamber 62 are respectively formed, and both the upper air chamber 61 and the lower air chamber 62 communicate with the mold cavity;

② Utilize the steam channels communicated with the upper air chamber 61 and the lower air chamber 62 respectively, pass high-pressure steam into the upper air chamber 61 and the lower air chamber 62 respectively and keep the pressure for a period of time, so that the upper air chamber 61 and the lower air chamber The high-pressure steam of 62 can penetrate into the foaming material from the upper and lower sides of the cavity at the same time;

③ After cooling, the finished foam plastic is obtained. Preferably, in step ③, the cooling water is used to cool the movable mold, the static mold and the semi-finished product to 80-100°C (preferably 90°C), and then the water is stopped, and the method of vacuuming is also included, from the upper air chamber 61 The step of pumping cooling water away from the lower air chamber 62 at the same time; at this time, a low-pressure state will be formed inside the equipment, and since the boiling point of water in a complete vacuum state will drop to nearly 80°C, the remaining water will boil again and turn into gas , under the action of these gases, the distance between the foam and the foam will be increased, so that all the internal pressure inside the foam will be released. At this time, the finished foam plastic can be demoulded. The temperature of the mold will still be around 80°C, so the next time the mold is closed, it will not need to be raised from normal temperature to more than 100°C, which will greatly improve the processing efficiency, and because there is no need to repeatedly raise the temperature, it also has the effect of saving energy and reducing emissions.

It should be noted that the cooling step of step ③ can be implemented without the need to pass high-pressure steam up and down together, that is, only need to use steam to heat the foaming, that is, step ② at this time is only: into the upper air chamber or the lower air chamber Steam is introduced to realize the heating of the foaming material.

In this way, by passing high-pressure steam into the upper air chamber 61 and the lower air chamber 62 respectively and maintaining the pressure for a period of time, the upper and lower sides of the foam material can be filled with a large amount of high-pressure steam at the same time, thereby ensuring thicker foaming The material can be evenly foamed on both the upper and lower sides, that is to say, it has the effect of good fusion degree on both the upper and lower sides.

As shown in Figure 1, the production equipment of a kind of high-efficiency energy-saving foam plastics that the present invention relates to comprises frame 1, moving mold 2, static mold 3, feeder 4, steam generating device 5, upper air chamber 61 and lower air chamber Chamber 62, a mold cavity is formed between the movable mold 2 and the static mold 3, the feeder 4 communicates with the mold cavity through the feeding pipeline 41, and the upper air chamber 61 and the lower air chamber 62 are respectively arranged on the sides of the mold cavity. The upper and lower sides are connected with the mold cavity. The frame 1 is formed with a first steam channel 11 communicating with the upper air chamber 61 and a second steam channel 12 communicating with the lower air chamber 62. The steam generating device 5 is connected to There is a main steam pipe 51 , which communicates with the upper air chamber 61 through the first steam passage 11 , and the second steam passage 12 is also connected with the exhaust pipe 52 .

The production equipment also includes a secondary steam pipeline 53 communicated with the main steam pipeline 51, the secondary steam pipeline 53 communicates with the exhaust pipeline 52, the secondary steam pipeline 53 is provided with a first valve 54, and the exhaust pipeline 52 A second valve 55 is also provided.

As shown in Figure 2, in the state where the first valve 54 is open and the second valve 55 is closed, the steam generated by the steam generating device 5 will be divided into two paths at this time, one is routed through the main steam pipeline 51 through the first steam channel 11 While communicating with the upper air chamber 61, the other route is connected with the lower air chamber 62 through the main steam pipe 51 through the auxiliary steam pipe 53 and the second steam passage 12, so that the foam material can be passed into the upper and lower sides simultaneously. steam, so as to realize the effect that even thicker foam materials can foam evenly.

In addition, the secondary steam pipeline 53 is also provided with a third valve 56 , the first valve 54 is set close to the main steam pipeline 51 , and the third valve 56 is set close to the exhaust pipeline 52 . In order to maintain the versatility of the production equipment that the present invention relates to, it also needs to allow this equipment to be used to produce common foamed plastics at the same time. In this case, in order to reduce costs, there will be no need for air intake on both sides. In this case, in order to reduce The loss of steam, by increasing the third valve 56, and let the first valve 54 be arranged at the position near the main steam pipe 51, and let the third valve 56 be arranged at the position near the exhaust pipe 52, so only need to close The first valve 54 and the third valve 56, as shown in FIG. 4 , can avoid the waste of steam entering the auxiliary steam pipeline 53 and reduce the cost to the greatest extent.

Furthermore, as shown in Figures 1 and 3, the end of the exhaust pipe 52 is also connected to a vacuum device 7, and the main steam pipe 51 is also provided with a fourth valve 57, which is located at the steam generating device. 5 and the secondary steam pipeline 53 to open or cut off the main steam pipeline 51. As shown in Figure 3, when the vacuum equipment 7 is opened, the fourth valve 57 needs to be closed, and the first to third valves 56 are opened. Short molding time, improve molding efficiency.

It should be noted that, in today's existing technology, the feeding pipeline 41 connected with the feeder 4 is generally connected with the moving mold 2, so that during the opening and closing process of the moving mold 2, the feeding pipeline 41 often It needs to be driven to move synchronously, so on the one hand it increases useless work, and more importantly, the entire material delivery pipeline 41 swings back and forth, which also brings certain hidden troubles to production, and there is indeed room for improvement.

Based on this, the inventor adopts the mode of reverse thinking, creatively developed: the feeder 4 and the static mold 3 are all fixed on the frame 1, the feeding pipeline 41 is fixedly connected with the static mold 3, the blanking The device 4 injects foaming material into the mold cavity between the movable mold 2 and the static mold 3 after the static mold 3 and the movable mold 2 are clamped.

Preferably, the production equipment of high-efficiency and energy-saving foamed plastics also includes an integrated valve, which is closely attached to the static mold. The integrated valve has a unique steam inlet channel and at least one steam outlet channel. The steam inlet channel It communicates with the main steam pipeline, one of the at least one steam discharge channel communicates with the steam discharge channel, and one of the at least one steam discharge channel communicates with the steam inlet of the static mold. At the same time, the steam inlet flow channel and the main steam pipeline are all provided with a thermal insulation layer to prevent the steam from dissipating heat. The integrated valve close to the static mold is used, so that the integrated valve can minimize the loss of steam heat. When steam is really needed, the steam is supplied from the steam discharge channel, which is very convenient and greatly improves the steam of the whole equipment. utilization rate.

In summary, compared with the prior art, the present invention can also ensure that the entire foam is evenly foamed when forming thicker foam plastics. In addition, the present invention can also be switched to traditional equipment at any time for forming ordinary foam plastics. Styrofoam, very convenient.

The above-mentioned embodiments and drawings do not limit the form and style of the product of the present invention, and any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of the present invention.

Claims (3)

1. the production technology of an energy-efficient foam plastics, it is characterised in that comprise the steps:

1. after will being used for finalizing the dynamic model of foam plastics and quiet mould matched moulds, utilizing blanking device to be respectively formed with upper chamber and lower chamber toward injecting frothing material in die cavity between dynamic model and quiet mould, the both sides up and down of this die cavity, this upper chamber be all connected with die cavity with lower chamber；

2. utilize the steam channel connected with upper chamber and lower chamber respectively, in upper chamber and lower chamber, be passed through high steam pressurize a period of time respectively, so that the high steam of upper chamber and lower chamber can be infiltrated into expanded material from the both sides up and down of die cavity simultaneously；

3. after cooling, it is thus achieved that finished foam plastics；

Step 3. in, cut off the water after using cooling water that dynamic model, quiet mould and semi-finished product are cooled to 80～100 DEG C, and also include the mode using evacuation, from upper chamber and lower chamber, the step taken away of water will be cooled down simultaneously.

The production technology of a kind of energy-efficient foam plastics the most as claimed in claim 1, it is characterised in that the temperature of above-mentioned cooling water is 50～70 DEG C.

The production technology of a kind of energy-efficient foam plastics the most as claimed in claim 2, it is characterised in that the temperature of above-mentioned cooling water is 60 DEG C.