CN111660483A - Foaming forming equipment and forming process for double-density foam board - Google Patents

Foaming forming equipment and forming process for double-density foam board Download PDF

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Publication number
CN111660483A
CN111660483A CN202010405974.3A CN202010405974A CN111660483A CN 111660483 A CN111660483 A CN 111660483A CN 202010405974 A CN202010405974 A CN 202010405974A CN 111660483 A CN111660483 A CN 111660483A
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CN
China
Prior art keywords
forming
foaming
molding
cavity
forming area
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Pending
Application number
CN202010405974.3A
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Chinese (zh)
Inventor
郑晓菲
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Fackel Machinery Fujian Co Ltd
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Fackel Machinery Fujian Co Ltd
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Publication date
Application filed by Fackel Machinery Fujian Co Ltd filed Critical Fackel Machinery Fujian Co Ltd
Priority to CN202010405974.3A priority Critical patent/CN111660483A/en
Publication of CN111660483A publication Critical patent/CN111660483A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/04—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities
    • B29C44/06—Making multilayered articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/3415—Heating or cooling
    • B29C44/3426—Heating by introducing steam in the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/58—Moulds
    • B29C44/585—Moulds with adjustable size of the mould cavity

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

The invention discloses foaming forming equipment of a double-density foam plate, which comprises a static die and a movable die, wherein the static die is provided with a first cavity and a second cavity; the static die is provided with a molding cavity, and the movable die is provided with a raised head which extends into the molding cavity and is in sliding sealing contact with the molding cavity. The scheme also correspondingly discloses a foaming forming process of the double-density foam board, which comprises the following steps of firstly enabling a movable die and a static die to move in a matched mode to form a first forming area, then introducing first foaming particles into the first forming area, then introducing steam into the first forming area to enable the first foaming particles to be fused and bonded to form a first preformed foaming body, then pulling out a raised head from the first forming area to form a second forming area between the first preformed foaming body and the raised head, then introducing second foaming particles into the second forming area, enabling the movable die to move towards the static die to extrude the second forming area, and finally introducing steam into the second forming area to enable the second foaming particles to be fused and bonded. The problems that production efficiency is low, production cost is high, and profitability of production enterprises is not facilitated in the prior art are solved.

Description

Foaming forming equipment and forming process for double-density foam board
Technical Field
The invention relates to the technical field of double-density foaming, in particular to foaming and forming equipment and a forming process of a double-density foam board.
Background
In the prior art, a common method for a dual-density structure is an assembly method, which involves two sets of molds and two foaming raw materials with different densities, and comprises the specific steps of filling the foaming raw materials with the corresponding densities of 1 and 2 into the molds 1 and 2 respectively, preparing the foaming parts 1 and 2 after molding, and then combining the foaming parts 1 and 2 in a bonding mode. The method needs two sets of dies and subsequent processes, seriously affects the production efficiency, needs a large amount of human resources, improves the production cost and is not beneficial to the profit of production enterprises.
In view of the above, the applicant has made an intensive study to solve the above problems and has made the present invention.
Disclosure of Invention
The invention aims to provide foaming and forming equipment for a double-density foam board, which solves the problems of low production efficiency and high production cost of the conventional double-density forming equipment.
The invention also aims to provide a foaming and forming process of the double-density foam board, which solves the problems of low production efficiency and high production cost of the traditional double-density forming process.
In order to achieve the above purpose, the solution of the invention is:
the foaming forming equipment of the double-density foam plate comprises a static die and a movable die; the static die is provided with a molding cavity, and the movable die is provided with a raised head which extends into the molding cavity and is in sliding sealing contact with the molding cavity.
Further, the mold cavity includes a first molding region at the bottom of the mold cavity and a second molding region between the first molding region and the opening of the mold cavity.
Further, the first forming zone is provided with a first feed channel.
Further, the stationary die includes a cavity side wall in sliding sealing contact with the nose, and a bottom wall at the bottom of the forming cavity; the first feed channel is formed in the bottom wall.
Further, the second forming zone is provided with a second feed channel.
Further, the second feed channel extends through the nose.
Further, the material feeding device also comprises a first material barrel connected with the first feeding channel and a second material barrel connected with the second feeding channel.
Furthermore, the movable mold also comprises a clamping step clamped at the edge of the opening of the molding cavity.
Furthermore, a first air inlet channel and a first air outlet channel which are communicated with the first forming area are arranged on the static die.
Furthermore, a second air inlet channel and a second air exhaust channel which are communicated with the second forming area are arranged on the movable mold.
Furthermore, a driving device for driving the movable die to move is connected to the movable die.
The invention also provides a foaming forming process of the double-density foam board, which comprises the following steps:
(1) the movable mold and the static mold move in a matching way to form a first molding area;
(2) filling the first forming area with first foaming particles;
(3) introducing water vapor into the first forming area through the first air inlet channel to enable the first foaming particles to be melted and bonded with each other to form a first preformed foaming body;
(4) drawing the raised head out of the first molding area to form a second molding area between the first preformed foam and the raised head;
(5) filling the second forming area with second foaming particles;
(6) moving the movable die to the static die to extrude the first preformed foaming body;
(7) and introducing water vapor into the second forming area through the second air inlet channel to enable the second foaming particles to be fused and bonded together, so that the double-density foam plate is formed.
Further, the first foaming particles and the second foaming particles in the step (2) and the step (5) are the same type of foamed particles.
Further, the first forming zone thickness L1 in step (1) is greater than the second forming zone thickness L2 in step (4).
Further, the distance that the movable die moves towards the stationary die in the step (6) is equal to the thickness L2 of the second molding zone in the step (4).
Further, the first forming area in the step (1) is communicated with the first charging barrel, and the second forming area in the step (4) is communicated with the second charging barrel.
Further, in the step (3), the temperature of the first preformed foam is 105 to 115 degrees.
Further, in the step (6), the movable die moves towards the stationary die, and when the first preformed foam is extruded, the temperature of the first preformed foam is 90-104 degrees.
After the structure is adopted, the foaming and forming equipment of the double-density foam board only uses one set of mould, the static mould is provided with a forming cavity, the movable mould is provided with a raised head which can extend into the forming cavity and is in sliding sealing contact with the forming cavity, the movable mould and the static mould move in a matching way to form a first forming area in the forming cavity, at the moment, first foaming particles can be filled into the first forming area, then water vapor is introduced to ensure that the first foaming particles are fused and mutually bonded together to form a first pre-foaming body, then the raised head is pulled out of the first forming area to form a second forming area between the first pre-foaming body and the raised head, second foaming particles are filled into the second forming area, then the movable mould moves towards the static mould to extrude the first foaming body to be preformed, then water vapor is introduced into the second forming area to ensure that the second foaming particles are fused and mutually bonded together, and the foaming body is extruded because of the first pre-forming body, and thus becomes more compact, the density becomes higher, relatively speaking, the foam of the second molding section is not compressed, and therefore the foam of the second molding section is in a normal molten state and the density becomes relatively low, so that the dual density foam sheet is molded. The foamed particles filled twice may be not only the same kind of foamed particles but also different kinds of foamed particles. Compared with the prior art, the scheme can reduce the processes, improve the production efficiency, reduce the production cost and be beneficial to the profit of production enterprises. In addition, the double-density foam board produced by the scheme is integrally manufactured, so that the double-density foam board is high in bonding strength and durable.
The invention also relates to a foaming forming process of the double-density foam board, which only uses one set of mould, the static mould is provided with a forming cavity, the movable mould is provided with a convex head which can extend into the forming cavity and is in sliding sealing contact with the forming cavity, firstly, the movable mould and the static mould are matched and move to form a first forming area in the forming cavity, then, first foaming particles are filled into the first forming area, then, water vapor is introduced into the first forming area to lead the first foaming particles to be fused and mutually bonded together to form a first pre-foaming body, then, the convex head is pulled out of the first forming area to form a second forming area between the first pre-foaming body and the convex head, then, second foaming particles are filled into the second forming area, then, the movable mould is moved towards the static mould to extrude the first pre-foaming body, finally, water vapor is introduced into the second forming area to lead the second foaming particles to be fused and mutually bonded together, since the first preformed foam is compressed, it becomes more compact and, relatively speaking, has a higher density, and the foam in the second molding zone is not compressed, so that the foam in the second molding zone is in a normally molten state and has a relatively lower density, and thus the dual density foam board is molded. The product produced by the process has high bonding strength between two foams with different densities, and the process has high production efficiency.
Drawings
FIG. 1 is a schematic diagram of forming a first forming region according to the present invention;
FIG. 2 is a schematic view of the present invention forming a second molding zone;
FIG. 3 is a schematic view of the moving mold moving toward the stationary mold according to the present invention.
In the figure: 1-moving die, 11-raised head, 12-second feeding channel, 13-second air inlet channel, 14-second air outlet channel and 15-clamping step;
2-stationary mold, 21-forming cavity, 211-first forming zone, 212-second forming zone, 22-first feed channel, 23-first feed channel, 24-first discharge channel, 25-cavity side wall, 26-bottom wall;
3-a first charging bucket; 4-a second charging bucket; 5-driving device.
Detailed Description
In order to further explain the technical solution of the present invention, the present invention is explained in detail by the following specific examples.
As shown in fig. 1-3, a foaming molding apparatus for a dual density foam board includes a stationary mold 2 and a movable mold 1; the stationary mold 2 has a molding cavity 21, and the movable mold 1 has a boss 11 which is inserted into the molding cavity 21 and is in sliding sealing contact with the molding cavity 21. The nib 11 can slide in the forming cavity 21 and by sliding the nib 11 a forming zone can be formed in the forming cavity 21.
Preferably, the molding cavity 21 comprises a first molding region 211 at the bottom of the molding cavity 21 and a second molding region 212 between the first molding region 211 and the opening of the molding cavity 21. The first molding zone 211 and the second molding zone 212 may mold two kinds of foam boards having different densities, thereby obtaining a dual density foam board.
Preferably, the first forming zone 211 is provided with a first feed channel 22. The first pass of expanded particles may enter the first forming zone 211 from the first feed channel 22.
Preferably, the stationary die 2 comprises a cavity side wall 25 in sliding and sealing contact with the nose 11, and a bottom wall 26 at the bottom of the forming cavity 21; the first feed channel 22 is formed in the bottom wall 26. The first feed passage 22 is provided in the bottom wall 26, and can be fed normally without being affected by the position of the movable mold 1.
Preferably, the second forming zone 212 is provided with a second feed channel 12. The second pass of expanded particles may pass from the second feed channel 12 into the second forming zone 212.
Preferably, the second feed channel 12 extends through the nose 11. The second feeding channel 12 is disposed through the movable mold 1 and the nose 11, so that the second foamed particles can enter the second forming region 212 precisely.
Preferably, the device further comprises a first material barrel 3 connected with the first feeding channel 22, and a second material barrel 4 connected with the second feeding channel 12. Two charging barrels are respectively connected with the first feeding channel 22 and the second feeding channel 12, so that the charging barrels can be more flexibly applied in actual production, and the two charging barrels can be internally provided with the same type of foaming particles or different types of foaming particles.
Preferably, the movable mold 1 further comprises a retaining step 15 clamped at the opening edge of the molding cavity 21. The stop step 15 has a limiting effect on the raised head 11.
Preferably, the stationary mold 2 is provided with a first intake passage 23 and a first exhaust passage 24 communicating with the first molding section 211. The first air inlet channel 23 is disposed on the stationary mold 2, so that the first foamed particles filled in the first molding region 211 can be more easily introduced with water vapor, and the first foamed particles are fused and bonded in the first molding region 211 to form a first preformed foam. The first air discharge passage 24 is for discharging excess air in the first molding region 211.
Preferably, the movable mold 1 is provided with a second intake passage 13 and a second exhaust passage 14 communicating with the second molding zone 212. The second air inlet passage 13 is provided in the movable mold 1, so that the second foamed particles filled in the second molding region 212 can be more easily supplied with water vapor to be melt-bonded in the second molding region 212. The second venting channel 14 is intended to vent excess air from the second forming section 212.
Preferably, the movable mold 1 is connected with a driving device 5 for driving the movable mold 1 to move. The driving device 5 may use an air cylinder or an oil cylinder.
The scheme also provides a foaming forming process of the double-density foam board, which comprises the following steps:
(1) the movable mold 1 and the static mold 2 move in a matching way to form a first molding area 211;
(2) filling the first molding region 211 with first foaming particles;
(3) introducing water vapor into the first forming zone 211 through the first air inlet channel 23 to melt and bond the first foamed particles together to form a first preformed foam;
(4) pulling the nose 11 out of the first molding region 211 to form a second molding region 212 between the first preformed foam and the nose 11;
(5) filling the second molding region 212 with second foaming particles;
(6) moving the moving die 1 to the static die 2 to extrude a first preformed foaming body;
(7) steam is introduced into the second molding zone 212 through the second air inlet passage 13 to fuse the second foamed particles to be adhered to each other, thereby molding the dual density foam sheet.
Preferably, the first foamed particles and the second foamed particles in step (2) and step (5) are the same foamed particles.
Preferably, the thickness L1 of the first forming region 211 in step (1) is greater than the thickness L2 of the second forming region 212 in step (4). Only when the thickness L1 of the first molding zone 211 is greater than the thickness L2 of the second molding zone 212, so that there is enough space to extrude the first preformed foam in step (6).
Preferably, the moving mold 1 moves toward the stationary mold 2 in the step (6) by a distance equal to the thickness of the second molding region 212 in the step (4). The thickness of the second forming zone 212 is dependent upon the thickness of the second foamed layer required at the time of the previous product design.
Preferably, the first forming area 211 of step (1) is communicated with the first barrel 3, and the second forming area 212 of step (4) is communicated with the second barrel 4. The two charging barrels can be filled with the same foaming particles or different foaming particles, and the two charging barrels respectively supply materials to the first forming area 211 and the second forming area 212, so that the foaming particles can be ensured to enter the corresponding forming areas accurately and inerrably.
Preferably, in step (3), the temperature of the first preformed foam is in the range of 105 ° to 115 °. The temperature of the first preformed foam is determined by the temperature of the introduced water vapor.
Preferably, in the step (6), the movable mold 1 is moved toward the stationary mold 2, and the temperature of the first pre-formed foam is in the range of 90 ° to 104 ° when the first pre-formed foam is extruded. The temperature of the first preformed foam is in the range of 90 to 104 deg., where the first preformed foam is relatively soft and the second foamed particles in the second forming zone 212 are relatively hard at ambient temperature, which makes it easier to extrude the first preformed foam.
The above embodiments and drawings are not intended to limit the form and style of the present invention, and any suitable changes or modifications thereof by those skilled in the art should be considered as not departing from the scope of the present invention.

Claims (10)

1. A foaming molding device of a double-density foam plate comprises a static die and a movable die; the method is characterized in that: the static die is provided with a molding cavity, and the movable die is provided with a raised head which extends into the molding cavity and is in sliding sealing contact with the molding cavity.
2. The foam molding apparatus of a dual density foam sheet according to claim 1; the method is characterized in that: the mold cavity includes a first molding region at the bottom of the mold cavity and a second molding region between the first molding region and the mold cavity opening.
3. The foam molding apparatus of a dual density foam board according to claim 2, wherein: the first forming zone is provided with a first feed channel.
4. The foam molding apparatus of a dual density foam board according to claim 3, wherein: the static die comprises a cavity side wall in sliding sealing contact with the raised head and a bottom wall at the bottom of the forming cavity; the first feed channel is formed in the bottom wall.
5. The foam molding apparatus of a dual density foam board according to claim 2, wherein: the second forming zone is provided with a second feed channel.
6. The foam molding apparatus of a dual density foam board according to claim 5, wherein: the second feed channel extends through the nose.
7. The foam molding apparatus of a dual density foam board according to claim 3, wherein: the material feeding device also comprises a first material barrel connected with the first feeding channel and a second material barrel connected with the second feeding channel.
8. The foam molding apparatus of a dual density foam sheet according to claim 1, wherein: the movable mold also comprises a clamping step clamped at the edge of the opening of the molding cavity.
9. The foam molding apparatus of a dual density foam sheet according to claim 1, wherein: and the static die is provided with a first air inlet channel and a first air outlet channel which are communicated with the first forming area.
10. The foam molding apparatus of a dual density foam sheet according to claim 1, wherein: and a second air inlet channel and a second air exhaust channel which are communicated with the second forming area are arranged on the movable mold.
CN202010405974.3A 2020-05-14 2020-05-14 Foaming forming equipment and forming process for double-density foam board Pending CN111660483A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010405974.3A CN111660483A (en) 2020-05-14 2020-05-14 Foaming forming equipment and forming process for double-density foam board

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010405974.3A CN111660483A (en) 2020-05-14 2020-05-14 Foaming forming equipment and forming process for double-density foam board

Publications (1)

Publication Number Publication Date
CN111660483A true CN111660483A (en) 2020-09-15

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ID=72383594

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010405974.3A Pending CN111660483A (en) 2020-05-14 2020-05-14 Foaming forming equipment and forming process for double-density foam board

Country Status (1)

Country Link
CN (1) CN111660483A (en)

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