CN115366316A - Foaming forming processing method, foaming mold, foaming forming device and foaming structure - Google Patents

Abstract

The application provides a foaming forming processing method, a foaming mold, a foaming forming device and a foaming structure. The foaming forming processing method comprises the following steps: respectively injecting different materials into at least two separated material injection cavities in the foaming mould, and carrying out semi-curing processing on the materials; after the first time, the adjacent material injection cavities are communicated, and the materials are cured and processed, so that different materials are connected with each other and form an integrated foaming structure. In the technical scheme of this application, can realize that the independent material of annotating of different positions in the foaming structure combines with each other, can once only accomplish the foaming shaping processing of integral type foaming structure. Meanwhile, the types and the number of the foaming structures in different shapes can be effectively reduced, the mold cost, the storage cost and the turnover cost can be greatly reduced, secondary combination operation is not needed, the assembly efficiency is favorably improved, and the processing cost is reduced.

Description

Foaming forming processing method, foaming mold, foaming forming device and foaming structure

Technical Field

The application relates to the technical field of foaming and forming, in particular to a foaming and forming processing method, a foaming mold, a foaming and forming device and a foaming structure.

Background

At present, the foaming material is one of materials commonly used in life, and is widely applied to the field of packaging of products such as household appliances, for example, a bottom pad, a cushion pad and other foaming structures made of the foaming material. For satisfying the operation requirement of transportation, circulation link, the foaming structure need increase special material in order to put forward high strength, and the secondary combination is carried out through sticky or the mode of inlaying to common way, makes the foaming structure combination that different materials made together, but this method can cause the kind of foaming structure to increase, leads to the storage of mould cost, material and turnover cost to increase by a wide margin, and simultaneously, the secondary combination process also can influence assembly efficiency, causes the processing cost to rise.

Disclosure of Invention

According to an embodiment of the present application, it is intended to at least improve one of technical problems existing in the prior art or the related art.

To this end, an object of an embodiment according to the present application is to provide a foam molding processing method.

Another object according to embodiments of the present application is to provide a foaming mold.

It is a further object of embodiments according to the present application to provide a foam molding apparatus.

It is a further object of embodiments according to the present application to provide a foamed structure.

In order to achieve the above object, an embodiment according to a first aspect of the present application provides a foam molding processing method including: respectively injecting different materials into at least two mutually isolated material injection cavities in the foaming mold, and carrying out semi-curing processing on the materials; after the first time, the adjacent material injection cavities are communicated, and the materials are cured and processed, so that different materials are connected with each other and form an integrated foaming structure.

According to the embodiment of the first aspect of the application, be provided with two at least notes material cavities that can separate the fender each other in the foaming mould, when carrying out the foaming molding processing, pour into different materials into respectively in separating the notes material cavity that keeps off at least two each other for different materials hold in the notes material cavity of difference, can prevent that different materials from taking place the intermix at the notes material in-process. By carrying out semi-curing processing on the materials, different materials form a semi-cured structure in the respective material injection cavities. After the semi-curing processing of first duration, through operating adjacent notes material cavity to switch on each other to the contact takes place between the different materials that are in the semi-curing state, at this moment, through further curing processing, makes the contact surface intercombination of different materials, and connects into a whole, and then forms final foaming structure, thereby realizes disposable, the integral type foam molding of the material of different material characteristics.

It should be noted that the materials in the present solution include, but are not limited to, EPS polystyrene foam, EPP foamed polypropylene, EPO foamed polystyrene polyethylene copolymer, GPO unsaturated polyester glass fiber mat material, EPE foamed polyethylene, EVA ethylene vinyl acetate copolymer; the kinds of the materials may be two or more.

It can be understood that, aiming at different use requirements of products, the performance requirements such as strength and the like of different positions on the foaming structure are different, and the material isolation of local positions cannot be realized by the formed foaming structure in the single material production process in the existing foaming technology, so that the use requirements of the foaming structure are difficult to meet.

The foam molding processing method in the scheme can realize independent material injection and interconnection at different positions in the foam structure, can complete the foam molding processing of the integrated foam structure at one time, effectively reduces the types and the number of the foam structures with different shapes, can greatly reduce the mold cost, the storage cost and the turnover cost, does not need to carry out secondary combination operation, is favorable for improving the assembly efficiency and reduces the processing cost.

In addition, the foam molding processing method in the above technical solution provided in the embodiments of the present application may further have the following additional technical features:

in the technical scheme, the material injection time corresponding to different materials is different.

In the technical scheme, different materials have different physical and chemical characteristics (such as shrinkage rate, molding pressure, curing time, cooling temperature and the like), so that required semi-curing processing time is different, and different materials are respectively subjected to material injection operation at different material injection moments, so that differentiated material injection operation is realized, respective curing requirements of different materials are met, the influence on the performance such as strength of the formed foaming structure is reduced, and the qualified rate of the foaming structure is ensured.

In the technical scheme, the time interval between two adjacent injection operations is in the range of 8s to 20 s.

In the technical scheme, due to the particularity of the foaming process, the actual operation time is short, and the time interval between two adjacent material injection operations is reasonably set so as to meet the curing process requirement of the materials. Specifically, the time interval may be 8s to 20s, and further, the time interval may be 10s to 15s, so as to improve the processing efficiency as much as possible on the premise of satisfying the curing process requirement.

In the technical scheme, the material injection operation is firstly carried out on the material which needs to be kept for a long time.

In the technical scheme, because different materials need to be finished at the same time in the semi-curing processing and curing processing processes, according to different characteristics of the materials, the material injection operation is firstly performed on the materials with longer time for pressure maintaining, and the material with shorter time for pressure maintaining is injected after a set time interval, so that the pressure maintaining time of different materials can meet the curing process requirement.

In the technical scheme, the semi-curing processing comprises temperature regulation operation and pressure regulation operation.

In the technical scheme, because the semi-curing process of the materials is related to the temperature and the pressure, the temperature and the pressure of the materials meet the curing process requirements by carrying out temperature adjusting operation and pressure adjusting operation (such as heating and pressurizing operation), and the purpose of semi-curing is achieved, so that the connection between different materials in the subsequent process is facilitated.

In the technical scheme, from the second injection operation, the process parameters before and after each injection operation are different; wherein, the process parameters comprise temperature and pressure.

In the technical scheme, because the technological parameters (including temperature and pressure) corresponding to different materials are different, the technological parameters are adjusted after different types of materials are injected, so that a dynamic curing process is realized, each material can be foamed and molded according to technological requirements, the strength of the connected different materials is improved, and the combination is firmer.

In the technical scheme, in each injection operation, after the material is filled in the corresponding injection cavity, the pressure maintaining operation is carried out on the material.

In the technical scheme, when the material injection operation is carried out and the corresponding material injection cavity is filled with the material, the material is kept for a period of time under the set pressure condition through pressure maintaining operation, so that sufficient time is provided for the semi-curing process of the material, and the material can complete the corresponding foaming change process.

In the above technical scheme, the holding pressure of the holding pressure operation is in the range of 0.4Mpa to 0.5 Mpa.

In the technical scheme, the pressure maintaining pressure is set in the range of 0.4MPa to 0.5MPa, so that proper pressure conditions are provided for the foaming change of the material, for example, gas is fully released, the material is promoted to expand, and a porous structure is formed.

In above-mentioned technical scheme, be equipped with between two adjacent notes material cavities and separate fender mechanism, make adjacent notes material cavity switch on after first time length, carry out curing processing to the material, make different material interconnect and form the foaming structure of integral type, include: after the first time period, opening the blocking mechanism; curing the materials to connect different materials and form an integrated foaming structure.

In the technical scheme, in the foaming mould, a blocking mechanism is arranged between adjacent injection cavities. After the materials are subjected to semi-curing processing for a first time, the blocking mechanism is operated to move and open, so that two adjacent material injection chambers are communicated, and at the moment, different semi-cured materials are in direct contact with each other; through further curing processing to the material for the contact surface intercombination of different materials connects as an organic wholely, thereby forms the foam structure of integral type, and the characteristic in the region that different materials correspond on the foam structure is different, in order to satisfy the user demand of product.

In an embodiment of the second aspect of the present application, there is provided a foaming mold for the foam molding processing method of any one of the embodiments of the first aspect, including: the injection molding die comprises a die body, wherein at least two injection cavities are formed in the die body; wherein, two adjacent annotate and can cut off each other or switch on between the material cavity.

According to an embodiment of the second aspect of the present application, the foaming mold may be applied to the foam molding processing method of any one of the embodiments of the first aspect described above. The foaming mould comprises a mould body, and the specific shape of the mould body can be designed according to the shape requirement of a foaming structure; at least two injection cavities are formed in the die body, and the two adjacent injection cavities can be mutually isolated and also can be mutually communicated. When the material injection operation is carried out, different material injection cavities are kept in a partition state firstly, and different types of materials can be injected into the different material injection cavities respectively, so that different materials are prevented from being mixed with each other in the material injection process; after the materials in the different material injection cavities reach a certain curing degree, the adjacent material injection cavities are communicated so that the different materials are contacted, and then the materials are combined into an integrated structure to meet the use requirement of a product. Wherein, the structure of the material injection chamber can be designed according to the actual shape of the foaming structure.

The foaming mould in this scheme is applicable to and carries out integration foaming shaping to different kinds of materials, and can realize once only foaming shaping, need not to carry out secondary combined machining, can effectively reduce the type and the quantity of the foaming structure of different shapes, can reduce mould cost, storage and turnover cost by a wide margin, is favorable to improving assembly efficiency simultaneously, reduces the processing cost.

In addition, the foaming mold in this scheme also has all the beneficial effects of the foam molding processing method in any one of the embodiments of the first aspect, and details are not repeated here.

In the above technical scheme, a communication port is arranged between the adjacent material injection chambers, and the communication port is provided with a blocking mechanism for blocking or conducting the adjacent material injection chambers.

In this technical scheme, through set up the intercommunication mouth between adjacent notes material cavity to make different materials can contact each other. Through separating at the intercommunication mouth and keeping off the mechanism, in order to utilize to separate to keep off the mechanism and separate and keep off the intercommunication mouth, make adjacent notes material cavity cut off each other, perhaps utilize to separate to keep off the mechanism and open the intercommunication mouth, make adjacent notes material cavity switch on each other, in order to carry out the foaming shaping course of working to the material, can adjust the state between the adjacent notes material cavity according to the processing needs, realize the separation of different materials promptly in notes material process, and make different materials contact each other after the material reaches half curing again, in order to realize the integration foaming shaping of different materials. The blocking mechanism includes, but is not limited to, various valves.

In the above technical solution, the blocking mechanism includes: the partition plate is arranged at the communication port; and the driving mechanism is connected with the partition plate and used for driving the partition plate to move so as to open or close the communication port.

In the technical scheme, the blocking mechanism specifically comprises a partition plate and a driving mechanism connected with the partition plate, so that the partition plate is driven to move by outputting power through the driving mechanism, the communication opening is opened or closed, and the state of the adjacent material injection chambers is adjusted.

In the above technical scheme, the die body is provided with a plurality of injection ports which are respectively communicated with different injection cavities.

In this technical scheme, through be equipped with a plurality of sprue on the mould body, make different notes material cavity be linked together with different sprue to make every notes material cavity all form independent material injection channel, so that annotate the material operation respectively to the material of different types, in order to prevent to take place the interact. It can be understood that if the material injection operation of different types of materials is carried out through a single material injection port, on the one hand, different types of materials can be mixed with each other in the material injection process, and on the other hand, the material injection mechanism needs to be switched to influence the overall processing efficiency. Each injection cavity can be correspondingly provided with one or more injection ports; the position of the injection port can be designed according to the specific shape of the foaming mold.

In an embodiment of the third aspect of the present application, there is provided a foam molding apparatus including: the foaming mold of any of the embodiments of the second aspect described above; and the at least two sets of material injection mechanisms are respectively used for injecting materials into different material injection cavities in the foaming mould.

According to the embodiment of the third aspect of the application, the foam molding device comprises the foam mold and at least two sets of material injection mechanisms, wherein different material injection mechanisms correspond to different material injection cavities in the foam mold respectively and are used for performing material injection operation on different material injection cavities so as to meet the material injection requirements of different types of materials, so that the different types of materials are foamed and molded in the foam mold and form an integrated foam structure. Wherein, each material injection cavity is at least correspondingly provided with a set of material injection mechanism.

In addition, the foam molding apparatus in this embodiment has all the advantages of the foam mold in any of the embodiments of the second aspect, and details are not repeated herein.

In an embodiment of the fourth aspect of the present application, a foam structure is provided, which is manufactured by the foam molding processing method of any one of the embodiments of the first aspect. At least two different positions of foaming structure are made by different types of materials respectively, and interconnect structure as an organic whole to the different positions that make foaming structure have different characteristics, thereby make local area have higher intensity, in order to satisfy different user demands. The foaming structure can be a bottom cushion, a cushion pad and the like, and can also be a structure made of other foaming materials.

In addition, the foam structure in this embodiment has all the advantages of the foam molding processing method in any one of the embodiments of the first aspect, and details are not repeated here.

In the above technical scheme, the foaming structure is a packaging base pad.

In the technical scheme, the foaming structure is a packaging base pad, can be used for products such as refrigerators and freezers, and is certainly suitable for other products such as washing machines. Through set up the packing heelpiece of this scheme in the packing box, can play fixed and cushioning effect to the product, can strengthen the packing stability of product, reduce the impaired possibility of product in transport or transportation.

Additional aspects and advantages of the embodiments of the application will be set forth in part in the description which follows or may be learned by practice of the application.

Drawings

The above and/or additional aspects and advantages of embodiments of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 shows a flow diagram of a foam molding process method according to one embodiment of the present application;

FIG. 2 shows a flow diagram of a foam molding process according to one embodiment of the present application;

FIG. 3 shows a schematic view of a foaming mold according to an embodiment of the present application;

FIG. 4 shows a schematic view of a base pad according to an embodiment of the present application;

FIG. 5 illustrates a schematic view of an assembled state of a barrier mechanism according to an embodiment of the present application;

fig. 6 shows a schematic block diagram of a foam molding apparatus according to an embodiment of the present application.

Wherein, the correspondence between the reference numbers and the names of the components in fig. 3 to 6 is as follows:

2 foaming mold, 21 mold body, 211 first chamber, 212 second chamber, 221 first injection port, 222 second injection port, 23 communication port, 24 blocking mechanism, 241 partition plate, 242 driving mechanism, 3 bottom pad, 31 first area, 32 second area, 4 foaming molding device, 41 first injection mechanism, 42 second injection mechanism.

Detailed Description

In order that the above objects, features and advantages of the embodiments according to the present application may be more clearly understood, embodiments according to the present application will be described in further detail below with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of embodiments according to the present application, however, embodiments according to the present application may be practiced in other ways than those described herein, and therefore the scope of protection of the present application is not limited by the specific embodiments disclosed below.

A foam molding processing method, a foam mold, a foam molding apparatus, and a foam structure according to some embodiments of the present application are described below with reference to fig. 1 to 6.

Example one

The embodiment provides a foaming forming processing method, as shown in fig. 1, including the following steps:

step S100: respectively injecting different materials into at least two separated material injection cavities in the foaming mould, and carrying out semi-curing processing on the materials;

step S200: after the first time, the adjacent material injection cavities are communicated, and the materials are cured and processed, so that different materials are connected with each other to form an integrated foaming structure.

In this embodiment, at least two injection cavities that can be separated from each other are disposed in the foaming mold. In the initial state, the adjacent material injection chambers are mutually isolated. The foam molding processing method includes step S100 and step S200.

When the foam molding process is performed, in step S100, different materials are injected into at least two separated injection chambers, so that different materials are accommodated in different injection chambers, and the different materials are prevented from being mixed with each other in the injection process.

After the material injection operation is completed, the materials in the material injection cavities are subjected to semi-curing processing, so that the materials form semi-cured structures in the corresponding material injection cavities.

After the semi-aging process is performed for a first period of time, in step S200, the adjacent material injection chambers are operated to be communicated with each other, so that different materials in a semi-aging state are contacted with each other, and at the time, the materials are aged, so that the contact surfaces of the different materials are combined with each other and connected into a whole.

After the curing processing is finished, different materials are mutually structured to form a final foaming structure, so that the one-time and integrated foaming molding of the materials with different material characteristics is realized.

The materials in this embodiment include, but are not limited to, EPS polystyrene foam, EPP expanded polypropylene, EPO expanded polystyrene polyethylene copolymer, GPO unsaturated polyester glass fiber mat material, EPE expanded polyethylene, EVA ethylene vinyl acetate copolymer; the kinds of the materials may be two or more.

It can be understood that the performance requirements such as strength and the like of different positions on the foaming structure are different according to different use requirements of products. In the single material production process in the existing foaming technology, the formed foaming structure cannot realize material isolation at local positions, and the use requirement on the foaming structure is difficult to meet.

For example, the foam structure, such as the bottom pad, manufactured by the foam molding method of the present embodiment is used for supporting the household electrical appliance in the packaging box. Wherein, be used for supporting the frame part's of household electrical appliances structure on the heelpiece and be used for supporting the panel part's of household electrical appliances structure, the intensity requirement to the heelpiece is different, can adopt different materials respectively, forms the heelpiece of integral type to provide the support to frame part and panel part respectively, in order to satisfy respective demand.

It should be emphasized that the foam structure supported by the foam molding method of the present embodiment is not limited to the bottom pad and the cushion pad used in the packaging process, but may be a component for other purposes.

The foam molding processing method in the embodiment can realize independent material injection and mutual combination at different positions in the foam structure, and can complete the foam molding processing of the integrated foam structure at one time.

Meanwhile, the types and the number of the foaming structures in different shapes can be effectively reduced, the mold cost, the storage cost and the turnover cost can be greatly reduced, secondary combination operation is not needed, the assembly efficiency is favorably improved, and the processing cost is reduced.

Example two

The embodiment provides a foaming forming processing method, which is further improved on the basis of the embodiment I.

Due to the different physical and chemical properties of the different materials (e.g. shrinkage, molding pressure, length of cure, cooling temperature, etc.), the length of the semi-cure process required also varies.

As shown in fig. 1, in the injecting operation in step S100, different materials correspond to different injecting times, that is, different materials are injected at different injecting times, so as to realize differential injecting operation.

The operation can meet respective curing requirements of different materials, so that the influence on the properties such as strength and the like of the formed foaming structure is reduced, and the qualification rate of the foaming structure is ensured.

EXAMPLE III

The embodiment provides a foaming forming processing method, which is further improved on the basis of the second embodiment.

Due to the particularity of the foaming process, the actual operation time is short, and the time interval of two adjacent material injection operations is reasonably set so as to meet the curing process requirement of the materials.

As shown in fig. 1, in particular, in step S100, the time interval between two adjacent injection operations may be 8S to 20S; further, the time interval is 10s to 15s, so that the processing efficiency is improved as much as possible on the premise of meeting the requirements of the curing process.

The time interval of the material injection operation can be set to be equal or unequal.

For example, the material types are three, and the time interval between two adjacent material injection operations can be set to 15s, that is, after the material injection operation is completed on the first material, the material injection operation of the second material is performed at an interval of 15s, and then the material injection operation of the third material is performed at an interval of 15 s.

Of course, the time interval of the material injection operation of the first two materials may be set to 15s, and the time interval of the material injection operation of the second two materials may be set to 12s, that is, after the material injection operation of the first material is completed, the material injection operation of the second material is performed at an interval of 15s, and after the material injection operation of the third material is completed, the material injection operation of the third material is performed at an interval of 12 s.

Example four

The embodiment provides a foaming forming processing method which is further improved on the basis of the second embodiment.

As different materials need to be finished at the same time in the semi-curing process and the curing process.

As shown in fig. 1, in step S100, according to the difference of the characteristics of different types of materials, the material injection operation is performed on the material requiring longer pressure maintaining time, and the material requiring shorter pressure maintaining time is injected after a set time interval, so that the pressure maintaining time of different materials can meet the requirement of the curing process.

For example, if the pressure maintaining time required for the first material is 20s, and the pressure maintaining time required for the second material is 10s, the first material is injected first, and then the second material is injected, so that the two materials both reach the required pressure maintaining time.

EXAMPLE five

The embodiment provides a foaming forming processing method which is further improved on the basis of the second embodiment.

Since the process of semi-aging the material is related to the temperature and pressure, as shown in fig. 1, in step S100, the semi-aging process includes a temperature adjusting operation and a pressure adjusting operation on the material, so that the temperature and pressure of the material meet the aging process requirements.

For example, the materials need to be subjected to semi-curing processing in a high-temperature and high-pressure environment, and the purpose of semi-curing the materials can be achieved through heating and pressurizing operations, so that different materials can be conveniently combined in subsequent processes, and an integrated foaming structure is formed.

EXAMPLE six

The embodiment provides a foaming forming processing method, which is further improved on the basis of the fifth embodiment.

As shown in fig. 1, in the injecting operation of step S100, after the material in the injecting chamber is filled, the material is subjected to pressure maintaining operation, so that the material is maintained under a set pressure condition for a period of time, so as to provide sufficient time for the semi-curing process of the material, and the material itself completes a corresponding foaming change process.

Further, the holding pressure is in the range of 0.4Mpa to 0.5Mpa to provide suitable pressure conditions for the foaming change of the material itself, for example, to sufficiently release the gas in the material, to promote the expansion of the material and to form a porous structure.

EXAMPLE seven

In the embodiment, a foam molding processing method is provided, and a blocking mechanism is arranged in a corresponding foam mold, and is specifically arranged between two adjacent injection cavities. As shown in fig. 2, the foam molding processing method comprises the following steps:

step S100: respectively injecting different materials into at least two mutually isolated material injection cavities in the foaming mold, and carrying out semi-curing processing on the materials;

step S210: after the first time period, opening the blocking mechanism;

step S220: curing the materials to connect different materials and form an integrated foaming structure.

In this embodiment, the foaming mold is specifically modified by arranging a blocking mechanism between adjacent injection cavities to match the above method steps.

Accordingly, step S200 in the first embodiment is further improved. In step S210, after the material is subjected to the semi-curing process for a first time period, the blocking mechanism is operated to move and open, so that two adjacent material injection chambers are communicated. The material injection chambers are communicated with each other, so that different materials in a semi-curing state are in direct contact with each other.

Through step S220, the material is further cured and processed, so that the material continues to be foamed, and meanwhile, the contact surfaces of different materials are combined with each other and are gradually connected into a whole, so that an integrated foaming structure is formed. Wherein, the characteristics of the region that different materials correspond on the foaming structure are different to satisfy the user demand of product.

Example eight

The present embodiment provides a foaming mold 2, which can be used in the foaming molding method in any of the above embodiments.

As shown in fig. 3, the foaming mold 2 includes a mold body 21, and the specific shape of the mold body 21 can be designed according to the shape requirement of the foaming structure. Two injection cavities are formed in the die body 21: the first chamber 211 and the second chamber 212, and the two injection chambers may be isolated from each other or may be communicated with each other.

During the injection operation, the initial state of the mold body 21 is a state in which different injection cavities are kept isolated from each other. Different types of materials are respectively injected into the two material injection cavities, so that different materials are prevented from being mixed with each other in the material injection process.

The material is gradually foamed by carrying out semi-curing processing on the material. When the materials in different material injection cavities reach the semi-curing degree, the first cavity 211 is communicated with the second cavity 212 through operation, so that the different materials in the semi-curing state are contacted, and then the materials are combined into an integrated structure to meet the use requirement of the product. Wherein, the structure of the material injection cavity can be designed according to the actual shape of the foaming structure.

It should be noted that the number of the material injection chambers may also be greater than two, and the two adjacent material injection chambers may be communicated or separated.

For example, the foaming structure formed by the foaming mold 2 of the present embodiment, such as the bottom pad 3 shown in fig. 4, is used for supporting the household electrical appliance in the packaging box. Wherein, the first region 31 of heelpiece 3 is used for supporting the frame part of household electrical appliances, and the second region 32 of heelpiece 3 is used for supporting the panel part of household electrical appliances, and is different to the intensity requirement of first region 31 and second region 32, can adopt different materials respectively, forms the heelpiece 3 of integral type to provide the support to the frame part and the panel part of household electrical appliances respectively, in order to satisfy respective demand.

Foaming mould 2 in this embodiment is applicable to and carries out integration foaming molding to different types of materials, and can realize once only foaming molding, need not to carry out secondary combined machining, can effectively reduce the type and the quantity of the foaming structure of different shapes, can reduce mould cost, storage and turnover cost by a wide margin, is favorable to improving assembly efficiency simultaneously, reduces the processing cost.

Example nine

The embodiment provides a foaming mold 2, and is further improved on the basis of the eighth embodiment.

As shown in fig. 3 and 5, in the mold body 21, a communication opening 23 is provided between the first chamber 211 and the second chamber 212 to enable different materials located in the two injection chambers to contact each other. The communication port 23 is provided with a blocking mechanism 24, and the communication port 23 may be blocked by the blocking mechanism 24 to block the first chamber 211 and the second chamber 212 from each other, or the communication port 23 may be opened by the blocking mechanism 24 to communicate the first chamber 211 and the second chamber 212 with each other.

In the process of foaming and forming materials, the state (blocking or conducting) between the first cavity 211 and the second cavity 212 can be adjusted according to the processing requirement, so that different materials are separated in the material injection process, and different materials are contacted with each other after the materials are semi-cured, so that the integrated foaming and forming of different materials are realized.

Further, as shown in fig. 5, the blocking mechanism 24 specifically includes a partition 241 and a driving mechanism 242. The partition plate 241 is provided in the communication port 23 and can block the communication port 23; the driving mechanism 242 is connected to the partition 241, so that the driving mechanism 242 outputs power to drive the partition 241 to move so as to open or close the communication port 23, thereby adjusting the states of the first chamber 211 and the second chamber 212.

The blocking mechanism 24 is not limited to the structure of the partition 241 in this embodiment, and may be various valve structures.

Example ten

The embodiment provides a foaming mold 2, and is further improved on the basis of the eighth embodiment.

As shown in fig. 3 and 4, the mold body 21 is provided with a plurality of injection ports, specifically, two first injection ports 221 and one second injection port 222. The first chamber 211 is larger in volume relative to the second chamber 212; the two first injection ports 221 are both communicated with the first chamber 211 and are located at different positions of the first chamber 211, so as to improve the efficiency of the injection operation. The second injection port 222 communicates with the second chamber 212.

Different injection cavities are communicated with different injection ports, so that the first cavity 211 and the second cavity 212 form independent material injection channels, and different types of materials are injected respectively, and mutual influence is prevented.

It can be understood that if adopt single sprue to carry out the notes material operation of different types of material, cause the material of annotating in-process different types of material intermix easily, and need switch the mechanism of annotating the material, influence holistic machining efficiency.

The position of the injection port is not limited to the position in the embodiment, and may be specifically designed according to the specific shape of the foaming mold 2.

One specific example of the above-described foaming mold 2 is described below:

the embodiment provides a foaming mold 2, which can be used for manufacturing a bottom pad 3 by using the foaming molding processing method in any embodiment.

As shown in fig. 3, the foaming mold 2 includes a mold body 21, and two injection cavities are formed in the mold body 21: the first chamber 211 and the second chamber 212, and the two injection chambers may be isolated from each other or conducted to each other.

As shown in fig. 3 and 4, the mold body 21 is provided with a plurality of injection ports, specifically, two first injection ports 221 and one second injection port 222. The first chamber 211 is larger in volume relative to the second chamber 212; the two first injection ports 221 are both communicated with the first chamber 211 and are located at different positions of the first chamber 211, so as to improve the efficiency of the injection operation. The second injection port 222 communicates with the second chamber 212.

Different injection cavities are communicated with different injection ports, so that the first cavity 211 and the second cavity 212 form independent material injection channels, and different types of materials are injected respectively, and mutual influence is prevented.

As shown in fig. 3 and 5, in the mold body 21, a communication opening 23 is provided between the first chamber 211 and the second chamber 212 to enable different materials located in the two injection chambers to contact each other.

As shown in fig. 3 and 5, the communication port 23 is provided with a blocking mechanism 24, and the blocking mechanism 24 specifically includes a partition plate 241 and a drive mechanism 242. The partition plate 241 is provided in the communication port 23 and can block the communication port 23; the driving mechanism 242 is connected to the partition 241, so that the driving mechanism 242 outputs power to drive the partition 241 to move so as to open or close the communication port 23, thereby adjusting the states of the first chamber 211 and the second chamber 212. The communication port 23 may be blocked by the blocking mechanism 24 to block the first chamber 211 and the second chamber 212 from each other, or the communication port 23 may be opened by the blocking mechanism 24 to communicate the first chamber 211 and the second chamber 212 with each other.

During the injection operation, the initial state of the mold body 21 is a state in which different injection cavities are kept isolated from each other. Different kinds of materials are respectively injected into the two material injection chambers through the first material injection port 221 and the second material injection port 222, so that different materials can be prevented from being mixed with each other in the material injection process.

The material is gradually foamed by carrying out semi-curing processing on the material. When the materials in the first chamber 211 and the second chamber 212 reach the half-cooked degree, the blocking mechanism 24 is operated to conduct the first chamber 211 and the second chamber 212, so that different materials in the half-cooked state are contacted, and then the materials are combined into an integrated structure to meet the use requirement of the product.

For example, as shown in fig. 4, the bottom pad 3 formed by the foaming mold 2 of the present embodiment is used for supporting the home appliance in the packaging box. Wherein, the first region 31 of heelpiece 3 is used for supporting the frame part of household electrical appliances, and the second region 32 of heelpiece 3 is used for supporting the panel part of household electrical appliances, and is different to the intensity requirement of first region 31 and second region 32, can adopt different materials respectively, forms the heelpiece 3 of integral type to provide the support to the frame part and the panel part of household electrical appliances respectively, in order to satisfy respective demand.

It should be noted that the number of the injection cavities may also be greater than two, and the two adjacent injection cavities may be communicated or separated. The foaming mold 2 is not limited to the use for producing the base pad 3, and may be used for producing a cushion pad or other members.

Foaming mould 2 in this embodiment is applicable to and carries out integration foaming molding to different types of materials, and can realize once only foaming molding, need not to carry out secondary combined machining, can effectively reduce the type and the quantity of the foaming structure of different shapes, can reduce mould cost, storage and turnover cost by a wide margin, is favorable to improving assembly efficiency simultaneously, reduces the processing cost.

EXAMPLE eleven

The present embodiment provides a foam molding apparatus 4, which can be used in the foam molding method in any of the above embodiments.

As shown in fig. 3 and 6, the foam molding apparatus 4 includes the foam mold 2 and at least two sets of injection mechanisms in any of the above embodiments. Specifically, annotate the material mechanism and include first notes material mechanism 41 and second notes material mechanism 42, respectively with foaming mold 2 in first cavity 211 and the second cavity 212 corresponding, first notes material mechanism 41 is used for annotating the material operation to first cavity 211, second notes material mechanism 42 is used for annotating the material operation to second cavity 212 to satisfy the notes material demand of different kinds of materials, make different kinds of materials foam molding in foaming mold 2, and form the foaming structure of integral type.

Wherein, annotate the quantity of material mechanism and be no less than two, and every annotates the material cavity and at least correspond and set up one set of material mechanism of annotating.

In addition, the foam molding apparatus 4 of this embodiment has all the advantages of the foam mold 2 of any of the above embodiments, and will not be described herein again.

Example twelve

In the present embodiment, a foaming structure is provided, and as shown in fig. 3 and 4, the foaming structure is manufactured by the foaming molding processing method in any one of the above embodiments.

As shown in fig. 4, the foam structure is specifically a bottom pad 3, at least two different positions on the bottom pad 3 are made of different kinds of materials, respectively, and include a first area 31 and a second area 32, the first area 31 and the second area 32 have different characteristics (for example, different strengths), and are connected to each other to form an integral structure, so that the local area has higher strength to meet different use requirements.

For example, the bottom pad 3 in the present embodiment is used for supporting the household electrical appliance in the packaging box. Wherein, the first region 31 of heelpiece 3 is used for supporting the frame part of household electrical appliances, and the second region 32 of heelpiece 3 is used for supporting the panel part of household electrical appliances, and is different to the intensity requirement of first region 31 and second region 32, can adopt different materials respectively, forms the heelpiece 3 of integral type to provide the support to the frame part and the panel part of household electrical appliances respectively, in order to satisfy respective demand.

The foam structure is not limited to the base pad 3 in this embodiment, and may be a cushion pad or a structure made of other foam materials.

It should be noted that the materials in this embodiment include, but are not limited to, EPS polystyrene foam, EPP foamed polypropylene, EPO foamed polystyrene polyethylene copolymer, GPO unsaturated polyester glass fiber mat material, EPE foamed polyethylene, EVA ethylene vinyl acetate copolymer; the kinds of the materials may be two or more.

Further, the foaming structure in this embodiment specifically is the packing heelpiece, and in packaging process, the packing heelpiece sets up in the packing box to play fixed and cushioning effect to the product, can effectively strengthen the packing stability of product, and then reduce the impaired possibility of product in transport or transportation. The packaging base pad can be suitable for refrigeration equipment such as a refrigerator and a freezer, and can also be suitable for household appliances such as a washing machine and other products; the packaging bottom pad with different shapes can be designed according to different products so as to be matched with the products.

In addition, the foam structure of this embodiment also has all the advantages of the foam molding processing method in any of the above embodiments, and details are not repeated herein.

One specific embodiment of the present application is provided below:

a foaming forming processing method is characterized in that a material I and a material II respectively complete feeding of different materials through a material injection hole I and a material injection hole II, so that equipment needs to be provided with two material injection systems, and material injection holes are required to be formed in molds for different materials. In order to ensure that the first material and the second material can not be mixed and can be combined at the same time, a partition plate and a core-pulling system are required to be added on the die, so that the two materials can be isolated from each other and can be fused.

Because the physical and chemical properties of different materials are different, and the shrinkage, molding pressure, curing time, cooling temperature and the like of the two materials are different, the related performance requirements of the product cannot be ensured according to the existing production process of the product made of a single material, and the product is unqualified.

In order to ensure that two materials of the product can meet the actual curing requirement and can be firmly connected, a production process of time-sharing material injection, pressure follow-up and dynamic curing is adopted, namely the pressure maintaining time required by the material II is longer or the pressure intensity is higher, the material II is firstly injected by adjusting a device program, the material I is then injected, the interval time is set according to the characteristics of the actual product (generally 10 seconds to 15 seconds), then the material with higher requirement is injected firstly by adjusting the pressure (the pressure maintaining pressure is basically controlled to be 0.4MPa to 0.5MPa at present), namely, a certain process parameter is set, semi-curing is carried out, then the material with lower requirement is injected, the production of the material is further completed after the relevant process parameter is adjusted, the process means is used for ensuring that the two materials can be perfectly foamed, and meanwhile, the two parts can be firmly combined, so that the production and manufacturing of the material are completed.

The manufacturing process parameters of the double materials are adjusted according to different structures and densities of products, each product is different, but the whole process scheme is the same, and only relevant parameters of each link are adjusted. The material type is not limited to two, and three or more material combinations are also applicable.

The technical solutions according to some embodiments of the present application are described in detail above with reference to the accompanying drawings, so that independent material injection and mutual combination at different positions in the foaming structure can be realized, and the foaming molding processing of the integrated foaming structure can be completed at one time. Meanwhile, the types and the number of the foaming structures with different shapes can be effectively reduced, the mold cost, the storage cost and the turnover cost can be greatly reduced, secondary combination operation is not needed, the assembly efficiency is favorably improved, and the processing cost is reduced.

In the description of the embodiments according to the present application, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred devices or units must have a specific direction, be configured and operated in a specific orientation, and thus, should not be construed as limiting the technical aspects of the present application.

In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example in accordance with the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the purpose of illustrating preferred embodiments of the present application and is not intended to limit the technical solutions of the present application, and it will be apparent to those skilled in the art that various modifications and variations can be made in the technical solutions of the present application. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the technical scheme of the application shall be included in the protection scope of the application.

Claims (16)

1. A foam molding processing method is characterized by comprising the following steps:

respectively injecting different materials into at least two mutually isolated material injection cavities in the foaming mold, and carrying out semi-curing processing on the materials;

and after the first time, the adjacent material injection cavities are communicated, and the materials are cured and processed, so that different materials are mutually connected and form an integrated foaming structure.

2. The foam molding process according to claim 1,

the corresponding injection time of different materials is different.

3. The foam molding process according to claim 2,

the time interval between two adjacent injection operations is in the range of 8s to 20 s.

4. The foam molding process according to claim 2,

firstly, injecting materials which need to be kept for a long time.

5. The foam molding process according to claim 2,

the semi-curing process comprises a temperature adjusting operation and a pressure adjusting operation.

6. The foam molding process of claim 5, wherein,

starting from the second material injection operation, the process parameters before and after each material injection operation are different;

wherein, the process parameters comprise temperature and pressure.

7. The foam molding process of claim 6, wherein,

and in each material injection operation, after the material is filled in the corresponding material injection cavity, carrying out pressure maintaining operation on the material.

8. The foam molding process of claim 7, wherein,

the pressure maintaining pressure of the pressure maintaining operation is in the range of 0.4MPa to 0.5 MPa.

9. The foam molding process of claim 1, wherein a blocking mechanism is disposed between two adjacent injection cavities, and after a first period of time, the two adjacent injection cavities are conducted to cure the materials, so that different materials are connected to each other and form an integrated foam structure, the process comprising:

after a first time period, opening the blocking mechanism;

and curing the materials to connect different materials and form an integrated foaming structure.

10. A foaming mold used in the foam molding processing method according to any one of claims 1 to 9, comprising:

the injection molding die comprises a die body, wherein at least two injection cavities are formed in the die body;

and the two adjacent injection cavities can be mutually isolated or communicated.

11. Foaming die according to claim 10,

and a communicating port is arranged between the adjacent material injection chambers and is provided with a blocking mechanism for blocking or conducting the adjacent material injection chambers.

12. Foaming mould according to claim 11, wherein the blocking means comprise:

the partition plate is arranged at the communication port;

and the driving mechanism is connected with the partition plate and used for driving the partition plate to move so as to open or close the communication port.

13. Foaming mould according to claim 10,

the die body is provided with a plurality of injection ports which are respectively communicated with different injection cavities.

14. A foam molding apparatus, comprising:

a foaming mold according to any one of claims 10 to 13;

and the at least two sets of material injection mechanisms are respectively used for injecting materials into different material injection cavities in the foaming mould.

15. A foam structure characterized in that it comprises a foam layer,

the foam structure is produced by the foam molding process according to any one of claims 1 to 9.

16. The foam structure of claim 15,

the foaming structure is a packaging bottom cushion.

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