CN114474549A - Preparation process and equipment of physical foaming material - Google Patents

Abstract

The invention discloses a preparation equipment for physical foaming material, comprising an extrusion unit, which includes a base, an extrusion motor installed on one side of the base, and an extrusion motor arranged on the other side of the base. A sleeve, a material storage unit, which includes an outer heating cylinder, an inner storage cylinder arranged on the inner side of the outer heating cylinder, and a stirring motor installed and arranged on the inner storage cylinder; The upper mold above the lower mold and a plurality of guide rods symmetrically arranged on the lower mold, wherein the material is conveyed between the material storage unit and the shaping unit through a metering pump. In the present invention, the raw materials extruded by the extrusion unit are directly introduced into the inner storage cylinder for storage, heated and kept warm by the heating element inside the outer heating cylinder, and then metered and output to the shaping unit through the metering pump. This kind of pipeline process method greatly improves the production fault tolerance rate.

Description

A kind of preparation technology of physical foaming material and its equipment

technical field

The invention relates to the technical field of foaming, in particular to a preparation process and equipment of a physical foaming material.

Background technique

Foaming is the general term for the production of foamed plastic molding methods. According to the classification of foamed plastics manufacturing methods, it can be divided into two categories: the method of making foamed plastics in one process after mixing plastic raw materials for foaming is called one-step foaming method. It is called direct method, and polyurethane foam is its typical representative; the method of preparing foam by two processes is called two-step foaming method, also known as batch method. In the two-step foaming, the former process is called pre-foaming or pre-foaming. At this time, the foam or beads have not been fully expanded and the density is also high, so the beads produced in this way are expandable beads. The latter process, referred to as post-foaming or post-foaming, produces a fully expanded, low-density final foam product.

The existing preparation process equipment generally directly injects the molten raw materials into the mold for foaming molding. However, due to the uncontrollable temperature of the intermediate process, the raw materials need to be rapidly foamed after the basic melting. The fault tolerance rate is low, and the extruder needs to work hard and cannot be shut down.

SUMMARY OF THE INVENTION

The purpose of this section is to outline some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of the application to avoid obscuring the purpose of this section, abstract and title, and such simplifications or omissions may not be used to limit the scope of the invention.

The present invention is proposed in view of the problems existing in the above-mentioned existing preparation process of a physical foam material and its equipment.

Therefore, the purpose of the present invention is to provide a preparation process and equipment of a physical foaming material, which are used to increase the fault tolerance and controllability in the foaming production process.

In order to solve the above-mentioned technical problems, the present invention provides the following technical solutions: a preparation equipment for physical foaming materials, including an extrusion unit, which includes a base, an extrusion motor installed on one side of the base, and an extrusion motor installed on the base. The extrusion sleeve on the other side of the base, and the feed barrel that is arranged on the base and communicated with the extrusion sleeve, the feeding port of the extrusion sleeve is fixedly connected with an extruder head ;

A material storage unit, which includes an outer heating cylinder, an inner storage cylinder arranged on the inner side of the outer heating cylinder, and a stirring motor installed and arranged on the inner storage cylinder, the inner storage cylinder is connected to the extruder head through a communication pipe The inner storage cylinder is provided with a stirring mechanism, and the stirring mechanism is driven by a stirring motor;

A shaping unit, which includes a lower mold, an upper mold arranged above the lower mold, a plurality of guide rods symmetrically arranged on the lower mold, and an upper mold seat disposed on the guide rods, the upper mold seat A hydraulic cylinder is installed on the upper part, and the hydraulic output end of the hydraulic cylinder penetrates the upper die seat and is connected with the upper die;

Wherein, the material is conveyed between the storage unit and the shaping unit through a metering pump.

As a preferred solution of the preparation process of a physical foaming material and its equipment according to the present invention, wherein: the stirring mechanism includes a stirring main shaft fixedly arranged on the output end of the stirring motor, and a stirring main shaft arranged on the stirring main shaft. A plurality of connecting shafts on the connecting shafts, the helical blades arranged on the connecting shafts, and the plurality of the connecting shafts are distributed on the helical blades in a spiral circle.

As a preferred solution of the preparation process of a physical foaming material and its equipment according to the present invention, wherein: the inner side of the outer heating cylinder is provided with a thermal insulation liner, and the bottom side of the outer heating cylinder is provided with a plurality of electric heating sheets , a plurality of the electric heating fins are distributed in a ring-shaped uniform array, and a temperature controller for controlling the temperature of the electric heating fins is arranged on the outer side of the outer heating cylinder.

As a preferred solution of the preparation process of the physical foaming material and its equipment according to the present invention, the outer heating cylinder is sealedly connected to the inner storage cylinder, and the outer heating cylinder is filled with heat-conducting oil.

As a preferred solution of the preparation process of a physical foam material and its equipment according to the present invention, wherein: the lower mold is provided with a molding cavity, an inner frame is placed in the molding cavity, and the inner frame is Side ears are symmetrically arranged on both sides of the edge.

As a preferred solution of the preparation process of a physical foaming material and its equipment according to the present invention, wherein: one side of the inner frame is provided with a feeding hole, and the feeding hole is connected with the feeding pipe of the metering pump One side of the upper mold is fixedly connected with a side sealing plate for closing the feeding hole, and the width of the side sealing plate is the same as that of the inner wall of the inner frame.

As a preferred solution of the preparation process of a physical foam material and its equipment according to the present invention, wherein: the feeding pipe of the metering pump is arranged through the outer heating cylinder, and the feeding pipe is communicated with the bottom of the inner storage cylinder .

A preparation process of a physical foaming material, the process comprises the following steps:

Step 1: After stirring a certain amount of basic polyether, polymer polyether, silicone oil, crosslinking agent and its catalyst, foaming agent and water, pour it into the extrusion unit to extrude the molten fluid material;

Step 2: Pass the raw material extruded from the extrusion head on one side of the extrusion unit into the material storage unit, and then continuously stir through the stirring component, and control the temperature to heat to ensure that the raw material is in a molten fluid state, where the heating temperature is not constant. below 200℃;

Step 3: The raw material is quantitatively fed into the setting unit through the metering pump, the hydraulic cylinder works after the raw material enters the lower mold, and then the upper mold is controlled to close the mold;

Step 4: The foaming work is carried out in the mold, and the foaming time is controlled at -min. After the foaming is completed, the mold is opened, and the inner frame is taken out, so as to facilitate the taking out of the foamed material.

Beneficial effects of the present invention:

1. The raw materials extruded by the extrusion unit are directly introduced into the inner storage cylinder for storage, heated and kept warm by the heating element inside the outer heating cylinder, and then metered and output to the shaping unit through the metering pump. A kind of pipeline process method, which greatly improves the production fault tolerance rate;

2. The multiple connecting shafts are driven to rotate by the stirring motor, and the spiral blades are spirally stirred, so as to avoid the deposition of materials and increase the mixing degree between the raw materials and the catalyst;

3. The upper mold is controlled by the hydraulic cylinder to close the mold, and then the side sealing plate automatically cuts off the feeding channel, so that the raw material is foamed in the molding cavity. Product release work.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort. in:

FIG. 1 is a schematic diagram of the overall structure of a preparation equipment for a physical foam material proposed by the present invention.

FIG. 2 is a schematic structural diagram of a shaping unit of a preparation equipment for a physical foam material proposed by the present invention.

FIG. 3 is a schematic structural diagram of an external heating cylinder of a device for preparing a physical foam material proposed by the present invention.

4 is a schematic structural diagram of a stirring mechanism of a preparation equipment for a physical foam material proposed by the present invention.

FIG. 5 is a schematic flowchart of a preparation process of a physical foam material proposed by the present invention.

In the picture: 100-extrusion unit, 101-base, 102-extrusion motor, 103-feed barrel, 104-extrusion sleeve, 105-extrusion head, 200-stock unit, 201-external heating Cylinder, 201a-insulation liner, 201b-heater, 201c-thermostat, 202-inner storage cylinder, 203-stirring motor, 204-stirring spindle, 205-connecting shaft, 206-spiral blade, 300-metering pump, 400-setting unit, 401-lower mold, 401a-molding cavity, 401b-inner frame, 401c-feed hole, 401d-side lug, 402-upper mold, 402a-side sealing plate, 403-guide rod, 404-upper mold Seat, 405-hydraulic cylinder.

Detailed ways

In order to make the above objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Many specific details are set forth in the following description to facilitate a full understanding of the present invention, but the present invention can also be implemented in other ways different from those described herein, and those skilled in the art can do so without departing from the connotation of the present invention. Similar promotion, therefore, the present invention is not limited by the specific embodiments disclosed below.

Second, reference herein to "one embodiment" or "an embodiment" refers to a particular feature, structure, or characteristic that may be included in at least one implementation of the present invention. The appearances of "in one embodiment" in various places in this specification are not all referring to the same embodiment, nor are they separate or selectively mutually exclusive from other embodiments.

Thirdly, the present invention is described in detail with reference to the schematic diagrams. When describing the embodiments of the present invention in detail, for the convenience of explanation, the cross-sectional views showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not be used here. Limit the scope of protection of the present invention. In addition, the three-dimensional spatial dimensions of length, width and depth should be included in the actual production.

Example 1

1-5 , which is an embodiment of the present invention, an apparatus for preparing a physical foam material is proposed, including an extrusion unit 100 , a material storage unit 200 , a shaping unit 400 and a metering pump 300 .

The extrusion unit 100 includes a base 101, an extrusion motor 102 installed on one side of the base 101, an extrusion sleeve 104 disposed on the other side of the base 101, and an extrusion sleeve 104 disposed on the base 101 and connected to the extrusion sleeve. The feeding barrel 103 communicated with the barrel 104, the extruder head 105 is fixedly connected to the feeding port of the extrusion sleeve 104;

The material storage unit 200 includes an outer heating cylinder 201, an inner storage cylinder 202 arranged on the inner side of the outer heating cylinder 201, and a stirring motor 203 installed and arranged on the inner storage cylinder 202. The outer heating cylinder 201 is sealedly connected with the inner storage cylinder 202, and The outer heating cylinder 201 is filled with heat-conducting oil to facilitate the uniformity of temperature transmission. The inner storage cylinder 202 is communicated with the extruder head 105 through a communication pipe. The inner storage cylinder 202 is provided with a stirring mechanism, and the stirring mechanism passes through the stirring motor 203. To drive, specifically, the stirring mechanism includes a stirring main shaft 204 fixedly arranged on the output end of the stirring motor 203, a plurality of connecting shafts 205 arranged on the stirring main shaft 204, and a spiral blade 206 arranged on the connecting shaft 205. The connecting shaft 205 is spirally distributed on the helical blade 206, and the extruded and melted raw materials are fully stirred and mixed through the continuous rotation of the stirring main shaft 204, the connecting shaft 205 and the helical blade 206. Further, the inner side of the outer heating cylinder 201 is provided with a The heat preservation inner tank 201a, the bottom side of the outer heating cylinder 201 is provided with a plurality of electric heating sheets 201b, and the plurality of electric heating sheets 201b are distributed in a ring-shaped uniform array, the outer side of the outer heating cylinder 201 is provided with a temperature controller 201c for controlling the temperature of the electric heating sheets 201b, The heating sheet 201b is for secondary heating of the raw material in the inner storage cylinder 202 to keep it in a fluid state.

The shaping unit 400 includes a lower mold 401, an upper mold 402 disposed above the lower mold 401, a plurality of guide rods 403 symmetrically disposed on the lower mold 401, an upper mold base 404 disposed on the guide rods 403, and the upper mold base 404 A hydraulic cylinder 405 is installed, and the hydraulic output end of the hydraulic cylinder 405 is connected to the upper mold 402 through the upper mold base 404. Moreover, the lower mold 401 is provided with a molding cavity 401a, and an inner frame 401b is placed in the molding cavity 401a. Side ears 401d are symmetrically arranged on both sides of the edge of the frame 401b, and the entire inner frame 401b can be taken out and separated by means of the side ears 401d, which facilitates the demolding of the product.

The material is conveyed between the storage unit 200 and the sizing unit 400 through the metering pump 300. The feeding pipe of the metering pump 300 is arranged through the outer heating cylinder 201, and the feeding pipe is communicated with the bottom of the inner storage cylinder 202. A feeding hole 401c is provided on one side, and the feeding hole 401c is communicated with the feeding pipe of the metering pump 300. One side of the upper mold 402 is fixedly connected with a side sealing plate 402a for closing the feeding hole 401c. The side sealing plate 402a The width is the same as the width of the inner wall of the inner frame 401b, that is, when the upper mold 402 is closed, the side sealing plate 402a can completely cover the feeding hole 401c, so that the foam molding inside the molding cavity 401a can work.

The preparation process of the preparation equipment applied to the above-mentioned physical foaming material specifically comprises the following steps:

Step 1: Pour a certain amount of basic polyether, polymer polyether, silicone oil, crosslinking agent and its catalyst, foaming agent and water from the feeding barrel 103 into the extrusion sleeve 104 for extrusion. molten fluid;

Step 2: The raw material extruded from the extrusion head on the side of the extrusion unit 100 is passed into the material storage unit 200, that is, the interior of the inner storage cylinder 202, the stirring motor 203 drives the stirring mechanism to continuously stir, and the temperature controller 201c Control the heating sheet 201b to heat the inner storage cylinder 202 to ensure that the raw material is in a molten fluid state, wherein the heating temperature is not lower than 200°C;

Step 3: The raw material is quantitatively fed to the setting unit 400 by the metering pump 300. After the raw material enters the lower mold 401, the hydraulic cylinder 405 works, and then the upper mold 402 is controlled to close the mold. When the mold is closed, the feeding hole 401c passes through the side sealing plate 402a for automatic closure;

Step 4: The foaming work is carried out in the mold, and the foaming time is controlled within 2-3 minutes. After the foaming is completed, the mold is opened. After the belt is cooled, the inner frame 401b is taken out through the side ears 401d, so as to facilitate the taking out of the foamed material. .

It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be Modifications or equivalent substitutions without departing from the spirit and scope of the technical solutions of the present invention should be included in the scope of the claims of the present invention.

Claims (8)

1. a preparation equipment of physical foaming material, is characterized in that: comprise, An extrusion unit (100), comprising a base (101), an extrusion motor (102) installed and arranged on one side of the base (101), and an extrusion motor (102) arranged on the other side of the base (101) A sleeve (104), and a feeding barrel (103) arranged on the base (101) and communicating with the extrusion sleeve (104), the feeding port of the extrusion sleeve (104) is fixed An extruder head (105) is connected; A material storage unit (200), comprising an outer heating cylinder (201), an inner storage cylinder (202) arranged on the inner side of the outer heating cylinder (201), and a stirring device installed on the inner storage cylinder (202) A motor (203), the inner storage cylinder (202) is communicated with the extruder head (105) through a communication pipe, a stirring mechanism is provided in the inner storage cylinder (202), and the stirring mechanism is passed through the stirring motor (203) to drive; A shaping unit (400), comprising a lower mold (401), an upper mold (402) disposed above the lower mold (401), and a plurality of guide rods (403) symmetrically disposed on the lower mold (401) , an upper die seat (404) arranged on the guide rod (403), a hydraulic cylinder (405) is installed on the upper die seat (404), and the hydraulic output end of the hydraulic cylinder (405) penetrates the upper die The seat (404) is connected with the upper mold (402); Wherein, materials are conveyed between the storage unit (200) and the shaping unit (400) through a metering pump (300). 2. The equipment for preparing a physical foam material according to claim 1, wherein the stirring mechanism comprises a stirring spindle (204) fixedly arranged on the output end of the stirring motor (203), a stirring spindle (204) arranged on the A plurality of connecting shafts (205) on the stirring main shaft (204), and helical blades (206) disposed on the connecting shafts (205), the plurality of connecting shafts (205) are spirally distributed on the helical blades (205). 206) on. 3. The preparation equipment of a kind of physical foam material according to claim 2, characterized in that: the inner side of the outer heating cylinder (201) is provided with a thermal insulation liner (201a), and the bottom of the outer heating cylinder (201) A plurality of heating fins (201b) are arranged on the side, and the plurality of heating fins (201b) are distributed in an annular uniform array, and a thermostat for controlling the temperature of the heating fins (201b) is arranged on the outside of the outer heating cylinder (201). (201c). 4. The equipment for preparing a physical foam material according to claim 3, wherein the outer heating cylinder (201) is sealedly connected with the inner storage cylinder (202), and the outer heating cylinder (201) is filled with There is heat transfer oil. 5. The equipment for preparing a physical foam material according to any one of claims 1 to 4, wherein a molding cavity (401a) is provided in the lower mold (401), and the molding cavity (401a) An inner frame (401b) is placed inside, and lateral ears (401d) are symmetrically arranged on both sides of the edge of the inner frame (401b). 6 . The equipment for preparing a physical foam material according to claim 5 , wherein a feed hole ( 401 c ) is provided on one side of the inner frame ( 401 b ), and the feed hole ( 401 c ) is connected with the feed hole ( 401 c ). The feeding pipes of the metering pump (300) are communicated with each other, and a side sealing plate (402a) for closing the feeding hole (401c) is fixedly connected to one side of the upper mold (402). The width of the side sealing plate (402a) is It is the same width as the inner wall of the inner frame (401b). 7. The equipment for preparing a physical foam material according to claim 1, characterized in that: the feeding pipe of the metering pump (300) is arranged through the outer heating cylinder (201), and the feeding pipe is connected to the inner storage The bottom of the cartridge (202) communicates. 8. a preparation technique of physical foaming material, is characterized in that: this technique comprises the following steps: Step 1: After stirring a certain amount of basic polyether, polymer polyether, silicone oil, crosslinking agent and its catalyst, foaming agent and water, pour it into the extrusion unit (100) to extrude the molten fluid material. ; Step 2: The raw material extruded from the extrusion head on one side of the extrusion unit (100) is passed into the material storage unit (200), and then continuously stirred by the stirring component, and the temperature is controlled for heating to ensure that the raw material is a molten fluid state, in which the heating temperature is not lower than 200°C; Step 3: the raw material is quantitatively fed into the shaping unit (400) by the metering pump (300), the hydraulic cylinder (405) works after the raw material enters the lower mold (401), and then the upper mold (402) is controlled to close the mold; Step 4: foaming is performed in the mold, the foaming time is controlled at 2-3min, the mold is opened after the foaming is completed, and the inner frame (401b) is taken out to facilitate the removal of the foamed material.

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