KR102024790B1 - Inosculating device of Expanded Polypropylene molding article and Inosculating methods - Google Patents

Abstract

An apparatus and method for joining a foamed resin molded article for manufacturing a large area foamed resin molded article are disclosed. According to an aspect of the present invention, there is provided an apparatus for joining foamed resin molded articles, the table being placed so that the joining surfaces of the foamed resin molded object to be joined face each other with the cutout interposed therebetween, from a standby position of the table side to a heating position inside the cutout. A left and right transfer unit for moving the heater unit from side to side to move between the standby position and the heating position, including a heater unit and a support shaft, which move heat to the joint surfaces facing each other, and the heater unit moves an arbitrary distance back and forth within the incision. The gist of the construction includes a push-pull unit which pushes the joining surfaces of the foamed object molded article, which is heated by the front and rear transfer unit and the heater unit, which are slidably coupled on the support shaft to be in contact with each other.

Description

Foamed resin molded article bonding apparatus and its method {Inosculating device of Expanded Polypropylene molding article and Inosculating methods}

The present invention relates to an apparatus and a method for joining a foamed resin molded article, and more particularly, to a foamed resin molded article joining apparatus for manufacturing two large-area, large-volume foamed resin molded articles by uniformly joining two foamed molded articles having the same bonding area. It's about how.

In general, the foamed resin molded body is produced through a foamed resin molding method in which foamed resin particles such as expanded polypropylene (EPP, Expanded Polypropylene) are heated in a pressurized environment and molded into a predetermined form. Such foamed resin molded articles have excellent heat resistance, mechanical strength, and workability, and are widely used in industries such as packaging materials, building materials, and vehicle interior materials.

Significant molding pressure is required to form the foamed resin molded body with uniform strength by high temperature and pressure molding the foamed resin particles as a raw material. In other words, in order to induce even density and tight bonding between particles, it is necessary to mold at a high pressure to withstand the enormous expansion pressure of the expanded resin particles filled in the molding space (mould cavity) during the molding process.

On the other hand, in the recent trend of larger size of large products, foamed resin molded bodies are also required to be larger and larger in area. However, the molding of the foamed resin molded body requires considerable pressure and high temperature as described above. Therefore, as the size of the molded body is increased, an enormous molding pressure is required to increase exponentially, and the mold size also needs to be grown to the desired size, which is accompanied by considerable technical and spatial difficulties.

Using a special adhesive, two foamed resin molded bodies of a certain size are bonded to each other to realize one large-area foamed resin molded body, or by applying heat to the joint surface of the two foamed resin molded bodies by using the thermoplastic resin particles. Thereafter, a method of realizing one large-area foamed resin molded body by heat-sealing two foamed resin molded bodies under predetermined conditions has been proposed.

However, in the former case, the use of expensive adhesives increases the manufacturing cost and the bonding conditions are very demanding, such as the need to be bonded at the proper timing after applying the adhesive. In the latter case, the heat is uniformly distributed throughout the bonding surface. The uniform quality of the molten state must be maintained, but there is a disadvantage in that even bonding is impossible if there is a slight temperature deviation for each region.

Korean Patent Publication No. 2013-0055986 (published date 2013. 05. 29)

SUMMARY OF THE INVENTION The present invention has been made in an effort to provide a foamed resin molded article joining apparatus and method capable of uniformly joining two foamed resin molded articles having the same material and density in a thermal fusion method by applying heat to a bonded surface to fuse them. will be.

Another technical problem to be solved by the present invention is to provide a foamed resin molded article joining apparatus and method capable of applying uniform heat without temperature variation throughout the bonding surface.

Another technical problem to be solved by the present invention is to implement an automation of the foamed resin molded article bonding process.

According to one aspect of the present invention as a means for solving the problem,

A device for joining two foamed molded articles of the same material,

A table in which a cutout is formed at a center thereof, and a joining surface of the foamed resin molded article to be bonded to the upper loading surface is placed to face each other with the cutout interposed therebetween;

A heater unit horizontally moved from a standby position of the table side to a heating position inside the cutout and applying heat to the joining surfaces facing each other at the heating position;

A left and right conveying unit including a support shaft and moving the heater unit from side to side to move between the standby position and the heating position;

A front and rear transfer unit slidingly coupled to the support shaft such that the heater unit is movable at an arbitrary distance back and forth within the cutout; And

It provides a foamed resin molded article bonding apparatus comprising a; push-pull unit for pushing the bonding surface of the foamed resin molded object heated by the heater unit to be in contact with each other.

In the present invention, the heater unit may be composed of a plate-shaped heat transfer plate for applying heat to the bonding surface, and one or more heaters installed in contact with the side portion of the heat transfer plate to apply heat to the heat transfer plate.

The heat transfer plate may be formed to have a width W2 corresponding to the width W1 of the bonding surface of the foamed molded article to be bonded.

In addition, it may be a configuration in which the receiving space is divided into a plurality of interior of the heat transfer plate, the heat transfer oil (Heating medium oil) is filled in each receiving space can minimize the temperature deviation of the heat transfer plate.

In addition, the heat transfer plate may have a configuration in which a portion of the center thereof protrudes to one side to form a predetermined bent portion.

In addition, one or more reinforcing material mounting holes are formed in the heat transfer plate, and the steel reinforcing material for reinforcing the joint portion of the foamed resin molded object to be bonded to the reinforcing material mounting hole may be freely attached.

In the present invention, the heater may be installed to face the two sides of the heating plate with the heating plate therebetween.

And the left and right transfer unit is mounted on the bottom plate and the lower surface of the bottom plate and the transfer plate including the support shaft is installed so that both ends are supported on both sides of the bottom plate, and both side side support, The linear guide block may be moved from the standby position to the heating position along the upper rail.

In addition, the front and rear transfer unit, the mounting surface on which the heater unit is mounted is formed on the upper surface, and the heater unit mounting unit and the heater unit mounting unit coupled to the pair of fixing members for fixing the heater unit on the mounting surface It may be a configuration including a pair of the support is supported on the support shaft, slidably coupled to the support shaft.

In addition, it is preferable to prevent a malfunction or component damage due to overheating of the device by forming a plurality of heat dissipation vent holes in the heater unit mount and the support.

In addition, a slit is formed on one side of the fixing member in contact with the mounting surface of the heater unit mounting table, so that the pair of fixing members are fixed to the mounting surface by a bolt that is bound to the heater unit mounting through the slit. It is preferable to allow the slit to adjust the spacing between the fixing members, thereby facilitating replacement of the heater unit and responding to changes in the thickness of the heat transfer plate.

In another aspect, the present invention, the controller for controlling the temperature of the heater unit may further include, the heating temperature of the bonding surface heated through the heater unit is 130 ℃ ~ 220 according to the foaming ratio (density) of the foamed resin molded article Preference is given between ° C.

According to another aspect of the present invention as a means for solving the problem,

A loading step of loading the bonding surfaces of the two foamed molded articles to be joined to face each other with a central incision portion of the table interposed therebetween;

A heating step of melting the joint surface by moving the object to be bonded to the foamed resin molded object such that the heater surface heated to a specific temperature enters between the joint surfaces disposed to face each other and then faces the side surfaces of the heater unit facing each other; And

At the same time, the object to be bonded is moved so that the joint surface is spaced apart from the heater unit, and the heater unit entered between the joint surfaces is retracted, and then the two melted joint surfaces are brought into close contact with each other to form two joint object molded foam members. It provides a foamed resin molded article bonding method comprising a; bonding step of bonding.

As another example, the loading step of loading the bonding surface of the two bonded object foamed resin molded product facing each other with a central incision of the table therebetween;

After the heater unit is heated to a specific temperature and the steel reinforcement member is inserted between the joint surfaces disposed to face each other, the foamed object molded object to be joined is melted by melting the joint surface so that the joint surfaces facing each other are in contact with both side portions of the heater unit. A heating step for inserting a part of the steel reinforcement into a joint surface side facing the steel reinforcement; And

At the same time, the object to be bonded is moved so that the joint surface is spaced apart from the heater unit, and the heater unit entered between the joint surfaces is retracted, and then the two melted joint surfaces are brought into close contact with each other to form two joint object molded foam members. Bonding, but the bonding step of bonding so that the other part of the steel reinforcing material is inserted into the opposite bonding surface side; provides a foamed resin molded article bonding method comprising a.

Here, the junction surface heating temperature in the heating step is preferably between 130 ℃ ~ 220 ℃ depending on the foaming ratio (density) of the foamed resin molded article.

According to an embodiment of the present invention, a heat fusion bonding method in which heat is uniformly applied to the joint surfaces of two foamed resin molded parts disposed to face each other at a predetermined interval, and the same material and size are used without using an expensive dedicated adhesive. Two foamed resin molded articles can be bonded with uniform bonding strength.

In addition, it is possible to freely replace the heat transfer plate according to the shape and size of the joint surface of the foamed resin molded object to be bonded, it is possible to increase the efficiency of the bonding process, even when the joint surface is a variety of curved forms. In addition, it is also possible to reinforce the stiffness of the joint by inserting a reinforcing material in the joint during the joining process.

 In addition, as the heater unit moves, heat is applied to the joint surface, and when the joint surface is heated and melted to an appropriate temperature, the push-pull unit operates to bond the two foamed resin molded parts so that the bonding is realized in an automated manner. It can greatly reduce the time and cost required to manufacture resin molded products.

1 is a block diagram of a foamed resin molded article bonding apparatus according to the present invention.
Figure 2 is a plan view of the foamed resin molded article bonding apparatus according to the present invention.
Figure 3 is a perspective view of the foamed resin molded article bonding apparatus according to the present invention.
4 is a perspective view of a transfer unit equipped with a heater unit.
5 is a front view of the transfer unit equipped with a heater unit.
6 is a view illustrating various embodiments of a heat transfer plate.
7 is a view showing a bonding process of the foamed resin molded article.
8 is a view showing another bonding process of the foamed resin molded article.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the invention. A singular expression includes a plural expression unless the context clearly indicates otherwise.

The terms "comprise" or "have" herein are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof described on the specification, and that one or more other features It should be understood that it does not exclude in advance the possibility of the presence or addition of numbers, steps, operations, components, parts or combinations thereof.

In addition, terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

In addition, the terms “… unit”, “… unit”, “… module”, etc. described in the specification mean a unit that processes at least one function or operation, which may be implemented by hardware or software or a combination of hardware and software. Can be.

In the description with reference to the accompanying drawings, the same reference numerals are assigned to the same components, and duplicate description thereof will be omitted. In the following description of the present invention, if it is determined that the detailed description of the related known technology may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

Orientation related terms used in the following description of the present invention below means the longitudinal direction of the cut portion formed in the center of the table, 'before and after' is the joining surface of the two bonded object foamed resin molded article that is disposed facing the incision between each other Note that it means the direction facing, that is, the width direction of the incision.

1 is a block diagram of a foamed resin molded article bonding apparatus according to the present invention, Figure 2 is a plan view of a foamed resin molded article bonding apparatus according to the present invention. And Figure 3 is a perspective view of the foamed resin molded article bonding apparatus according to the present invention.

1 to 3, the foamed resin molded article joining apparatus according to the present invention is a device for joining two foamed resin molded articles of the same material, the table on which two bonding target foamed resin molded articles (P1, P2) are placed ( Include 1). An incision 10 is formed in the center of the table 1, and the table S (S1, S2) of the foamed resin products P1 and P2 to be bonded to the upper loading surface faces the incision 10 between them. 1) put on

Although not shown, the table 1 may include an alignment unit. The alignment unit is placed on the table 1 so that the joining surfaces S1 and S2 of the two joining foam molded articles P1 and P2 face each other at a position where they can be exactly in contact with the same height with the cutout 10 interposed therebetween. By aligning, it may include actuators for adjusting the height and the left and right positions of the foamed resin molded articles (P1, P2).

The heater unit 2 is arrange | positioned at the side part of the table 1. The heater unit 2 is mounted to the transfer units 3 and 4 to be described later, and the inside of the cutout portion 10 along the cutout portion 10 at the standby position of the side of the table 1 by the transfer units 3 and 4. It moves horizontally to the heating position of. And heat is applied to the joining surfaces (S1, S2) of the two bonded object foamed resin molded products (P1, P2) facing each other with the incision 10 in between at the heating position.

The heater unit 2 is capable of precise temperature control through the controller (6). Accordingly, heat may be applied to the bonding surfaces S1 and S2 at a temperature suitable for bonding depending on the material of the foamed resin molded articles P1 and P2. Preferably, the temperature control range of the heater unit 2 may be between 130 ° C and 220 ° C. That is, the heating temperature of the bonding surfaces S1 and S2 by the heater unit 2 is preferably between 130 ° C. and 220 ° C., depending on the expansion ratio (density) of the molded foam article.

The heater unit 2 may be mounted on the transfer units 3 and 4 and moved back and forth and left and right. The transfer unit may be largely composed of two parts. Preferably, the left and right transfer unit (3) for moving the heater unit 2 to the left and right along the longitudinal direction of the cutout portion 10, and the heater unit with respect to the width direction of the cutout portion within a limited range It can be configured as a front and rear transfer unit (4) to allow (2) to move freely.

The left and right transfer unit 3 includes a support shaft 36 and moves the heater unit 2 to the left and right so as to move between the standby position and the heating position. In addition, the front and rear transfer unit 4 supports the foamed molded articles P1 and P2 to be joined at both sides of the heater unit 2 at different timings in the joining process so that they can be pushed back and forth at an arbitrary distance in response to the timings. Slidingly coupled on shaft 36.

That is, the heater unit 2 can be moved from the standby position of the table 1 side by the left and right transfer unit 3 to the designated heating position, and is limited by the front and rear transfer unit 4 (of the cutout 10). The heater unit 2 can move freely back and forth within the width) so that any joining surfaces S1 and S2 first contact the heater unit 2 at the time of joining so that the meltability of the two joining surfaces S1 and S2 is uneven. Minimization can be minimized.

A push-pull unit 5 may be installed around the table 1. The push-pull unit 5 has a function of pushing the bonding surfaces S1 and S2 of the two foamed resin molded products P1 and P2 to be bonded so as to contact the heater unit 2 or pulling them apart from the heater unit 2. do. In addition, the contact surface (S1, S2) of the melt-jointed foamed resin molded products (P1, P2) in contact with the heater unit 2 serves to quickly contact each other.

The push pull unit 5 preferably includes a holding member capable of holding both side portions (or rear ends opposite to the joining surfaces) of the foaming target molded articles P1 and P2 to be joined. It may also include an actuator, for example, a cylinder or a motor that provides a driving force to be moved to the front and back direction on the table 1, the molded object to be bonded P1, P2 held through the holding member.

The drawing shows a configuration in which the push-pull units 5 are arranged in a left-right pair form on each side of the table 1 divided by the cutout 10, but the present invention is not limited thereto. There may be various deformations, including the form of the pushing force in the direction of joining the two panels on the opposite sides of the joint surface (S1, S2) of the foamed resin molded articles (P1, P2) to be bonded to the front end of the table (1). .

4 and 5 are a perspective view and a front view of the transfer unit equipped with a heater unit. With reference to this it will be described in more detail the configuration of the heater unit and the transfer unit.

4 to 5, the heater unit 2 is installed to be in contact with the plate-shaped heat transfer plate 20 for applying heat to the bonding surface (S1, S2), and the heat transfer plate 20, the heat transfer plate 20 ) May include one or more heaters 22R, 22L. Preferably, a pair of heaters 22R and 22L may be provided to face each other with the heat transfer plate 20 interposed therebetween.

The heat transfer plate 20 may be formed to have a width W2 corresponding to the width W1 of the bonding surfaces S1 and S2 of the foaming molded articles P1 and P2 to be bonded (see FIG. 3). In addition, it may be configured in the form of a metal plate having a high thermal conductivity such as aluminum (Al), copper (Cu), brass (Brass). In addition, the pair of heaters 22R and 22L that apply heat to the heat transfer plate 20 may be configured to be in close contact with both lower sides of the heat transfer plate 20 to apply a heat to a lower height than the heat transfer plate 20.

As shown in the drawing, the left and right conveying unit 3 is provided such that both ends are supported by the bottom plate 31, side support members 32 on both sides of the bottom plate 31, and both side support members 32. It may be provided with a carriage 30 including a shaft (36). It may also include a linear guide block 38 mounted on the bottom surface of the bottom plate 31, the linear guide block 38 is moved in the heating position or vice versa along the rail 37 on the base (B).

The front and rear transfer unit 4 may include a heater unit mount 40 having a mounting surface 41 on which the heater unit 2 is mounted. The mounting surface 41 may be coupled to a pair of fixing members 42 for fixing the heater unit 2 on the mounting surface 41, the lower portion of the heater unit mounting unit 40 One or more pairs of supports 44 may be installed to be mounted such that the mount 40 may slide back and forth along the support shaft 36.

In some cases, a return spring (not shown) for returning the heater unit 2 mounted on the front and rear conveying unit 4 to a designated position (a position corresponding to the center of the cutout portion) is provided with the left and right conveying unit 3. It may be installed between the transfer unit (4). Preferably, the return spring may be installed to generate a restoring force in a direction opposite to each other on the support shaft 36 between the support 44 and the side support 32.

Heat dissipation vent holes (H) may be formed in the heater unit mounting table 40 and the support base 44. Ventilation hole (H) is to ensure the heat dissipation of the device, the electrical wire or other electrical components for supplying power to the heaters (22R, 22L) just by forming the ventilation hole (H) is a heater (22R, 22L) It can effectively prevent overheating and damage or malfunction by heat.

One side of the fixing member 42 in contact with the mounting surface 41 of the heater unit mounting table 40 may be formed with a slit (S) to enable the interval adjustment between the fixing members 42, the slit (S) The pair of fixing members 42 may be firmly fixed to the mounting surface 41 by bolts 43 that are coupled to the heater unit mounting table 40. Accordingly, the heater unit 2 may be replaced by slightly loosening the bolt 43 and moving the fixing member 42 in a direction to be spaced apart from each other.

That is, due to the interval adjustment function of the fixing member 42 composed of the slit (S) and the bolt 43, it is necessary to replace the heater unit 2 in accordance with the shape and size of the foamed resin molded articles (P1, P2) to be bonded. When the bolt 43 is slightly loosened and only the operation of adjusting the gap of the fixing member 42 can quickly replace the heater unit 2, preferably the heat transfer plate 20, and in some cases, heat transfer plates having different thicknesses ( 20) may be used to respond to changes in its thickness.

6 is a view illustrating various embodiments of a heat transfer plate.

As shown in (a) of FIG. 6, the heat transfer plate 20 may have a plurality of receiving spaces 200 partitioned therein, and a heat medium oil 202 is filled in each receiving space 200. It uses the principle that the temperature rises rapidly in the convection and low pressure of the heat medium oil (202) when heat is applied, the structure that can minimize the temperature deviation of the heat transfer plate 20, the temperature of the heat transfer plate 20 As it rises rapidly, waiting time can be reduced.

The heat transfer plate 20 may also have a configuration in which a portion of the center thereof protrudes to one side to form a predetermined bent portion 210 as shown in FIG. 6B. This configuration is applicable when the cross-sectional shape of the joining surfaces (S1, S2) is bent to increase the joining areas of the joining surfaces (S1, S2) in contact with each other to sufficiently secure the bonding strength, the shape of the bent portion 210 It is not limited to the shape as an example of the drawings.

6 (c) is a configuration in which the two foamed resin molded products (P1, P2) to be bonded in a heat-sealed manner, insert the reinforcement to the joint portion to reinforce the bonding strength, as shown in the figure One or more reinforcing material mounting holes 220 are formed in the 20, and the steel reinforcing material 230 for reinforcing a joint portion in the reinforcing material mounting hole 220 may be detachably freely bound.

On the other hand, although not shown in the present invention, the foamed resin molded articles (P1, P2) slightly in the process of joining the two foamed resin molded articles (P1, P2) placed on the table (1) to the table (1) side While pressing, it may further include a rolling unit for smoothly guiding the movement toward the heater unit 2 side or the direction away from the heater unit 2 by the push-pull unit 5 described above.

 In addition, the hot air supply means for preheating the peripheral portion of the junction before heating to a predetermined temperature in order not to cause the melt separation due to the separation of the cross section of the product during the heat welding or excessive local heating, and radiant heat or heat transfer by the hot wind supply means It may include a tunnel-type cover covering the cutout 10 so that it can be efficiently transmitted to the surrounding surfaces (S1, S2) only in a short time without being diffused elsewhere.

In this case, the hot wind supply means may have a configuration including a heating element and a blower for forcibly blowing air heated by the heating element to the inside of the tunnel-type cover. Of course, the present invention is not limited thereto, and there may be various modifications such as a configuration in which the hot air spray nozzles are uniformly disposed to face the inside of the cover to spray the heated air with an even distribution inside the cover.

Hereinafter, the bonding process of the foamed resin molded article carried out through the foamed resin molded article bonding apparatus according to the present invention having the configuration as described above.

7 is a view showing a bonding process of the foamed resin molded article.

Referring to FIG. 7, foamed molded articles P1 and P2 to be bonded are loaded so that the joining surfaces S1 and S2 face each other with the cutout 10 at the center of the table 1 ( loading step ). Loading of the foamed resin molded articles P1 and P2 may be considered by the loading robot to load the foamed resin molded articles P1 and P2, which are located in the manual or atmospheric part, and automatically load them at the correct loading position on the table 1. Can be.

When the loading is finished, the heater unit 2 heated to a specific temperature is allowed to enter between the joining surfaces (S1, S2) that is disposed facing, that is, the cutout (10). Then, the two joining target foamed resin molded articles P1 and P2 are moved such that the two joining surfaces S1 and S2 facing each other contact both side portions of the heater unit 2. The joining surfaces S1 and S2 in contact with the heater unit 2 receive heat from the heater unit 2 and are melted, thereby becoming a state in which they can be fused to each other ( heating step ).

When the joining surfaces S1 and S2 are fused, the heater unit 2 which has entered between the joining surfaces S1 and S2 is retracted to its original standby position. Then, the two bonding target foamed resin molded products P1 and P2 are brought into close contact with each other so that the two joining surfaces S1 and S2 in a fusion state are contacted at a predetermined pressure. Then, the two joinable joining surfaces S1 and S2 are thermally fused to each other to form a solid bond ( bonding step ).

On the other hand, in some cases immediately after the joining, a process of cooling the joined part by spraying cooling wind onto the joined part may be further added. That is, the method may further include a step of preventing the joint from thermally deforming through cooling. The joining of one cycle is terminated by unloading one large-area foamed resin molded product manufactured through the joining step from the table 1. .

8 is a view showing a bonding process of the foamed resin molded article according to another embodiment.

Referring to FIG. 8, foamed molded articles P1 and P2 to be bonded are loaded so that the joining surfaces S1 and S2 face each other with the cutout 10 at the center of the table 1 ( loading step ). Loading of the foamed resin molded articles P1 and P2 may be considered by the loading robot to load the foamed resin molded articles P1 and P2, which are located in the manual or atmospheric part, and automatically load them at the correct loading position on the table 1. Can be.

After loading, the heater unit 2 heated to a specific temperature and equipped with the steel reinforcement 230 enters the cutout 10. Then, the two joining objects S1 and S2 move the two foamed molded articles P1 and P2 to be joined so as to contact both side portions of the heater unit 2.

At this time, the steel reinforcing material 230 is also heated to a specific temperature by the heater unit (2). Therefore, a portion of the steel reinforcing material 230 may be naturally inserted into the bonding surface (S2) side of one side of the foamed resin molded article (P2). And both the joining surfaces (S1, S2) in contact with the heater unit 2 is melted and fused to each other ( heating step ).

After the heating of the joining surfaces (S1, S2), the two joint object foamed resin molded products (P1, P2) are moved so as to be spaced apart from the heater unit (2), and the heater unit (2) entered between the joining surfaces (S1, S2). Retract to the original standby position. Then, the two foamed resin molded articles P1 and P2 are brought into close contact with each other so that the two joining surfaces S1 and S2 in a fusion state are in contact with each other at a constant pressure.

At this point the steel reinforcement 230 still contains significant heat. Therefore, the other part exposed to the outside may also be naturally inserted into the opposite joint surface S1, and the two joint surfaces S1 and S2 in the fusion state are in contact with each other and thermally fused to form a solid bond. Bonding is complete ( bonding step ).

According to this other joining method, the reinforcing material can be embedded in the joining portion of the foamed resin molded object to be joined in the joining process. As a result, the physical stiffness of the joint after joining can be increased to further improve the durability of the product.

According to an embodiment of the present invention, a heat fusion bonding method in which heat is uniformly applied to the joint surfaces of two foamed resin molded parts disposed to face each other at a predetermined interval, and the same material and size are used without using an expensive dedicated adhesive. Two foamed resin molded articles can be bonded with uniform bonding strength.

In addition, it is possible to freely replace the heat transfer plate according to the shape and size of the joint surface of the foamed resin molded object to be bonded, it is possible to increase the efficiency of the bonding process, even when the joint surface is a variety of curved forms. In addition, it is also possible to reinforce the stiffness of the joint by inserting a reinforcing material in the joint during the joining process.

 In addition, as the heater unit moves, heat is applied to the joint surface, and when the joint surface is heated and melted to an appropriate temperature, the push-pull unit operates to bond the two foamed resin molded parts so that the bonding is realized in an automated manner. It can greatly reduce the time and cost required to manufacture resin molded products.

In the detailed description of the present invention, only specific embodiments thereof have been described. It is to be understood, however, that the present invention is not limited to the specific forms referred to in the description, but rather includes all modifications, equivalents, and substitutions within the spirit and scope of the invention as defined by the appended claims. Should be.

1: Table 2: Heater Unit
3: left and right transfer unit 4: front and rear transfer unit
5: push pull unit 6: controller
10: incision
20: heating plate 22R, 22L: heater
30: transfer table 31; Bottom plate
32: side support 36: support shaft
37: rail 38: linear guide block
40: mounting unit 41: mounting surface
42: fixing member 43: bolt
44: support 200: receiving space
202: heat medium oil 210: bend
220: mounting hole 230: steel reinforcement
B: Base H: Vent Hole
S: Slit
P1, P2: Foamed resin molded products S1, S2: Bonding surface

Claims (15)

As a device for joining two foamed molded articles (P1, P2) of the same material,
A cutout portion 10 is formed in the center, and a table in which the joining surfaces S1 and S2 of the foaming target molded articles P1 and P2 to be joined to the upper loading surface face each other with the cutout portion 10 interposed therebetween. (One);
A heater unit (2) horizontally moved from a standby position of the table (1) side to a heating position inside the cutout (10), and applying heat to the joining surfaces (S1, S2) facing each other at the heating position;
A left and right conveying unit (3) including a support shaft (36) for moving the heater unit (2) from side to side to move between the standby position and the heating position;
A front and rear transfer unit 4 slidingly coupled to the support shaft 36 such that the heater unit 2 is movable at an arbitrary distance back and forth within the cutout 10; And
And a push-pull unit 5 for pushing the bonding surfaces S1 and S2 of the bonding target foamed resin products P1 and P2 heated by the heater unit 2 to be in contact with each other.
The front and rear transfer unit 4 is a pair of fixing members having a mounting surface 41 on which the heater unit 2 is mounted, and fixing the heater unit 2 to the mounting surface 41. The heater unit mounting table 40 to which the 42 is coupled, and the pair of the support units 44 supporting the heater unit mounting table 40 on the support shaft 36 and slidably coupled to the support shaft 36. ),
A slit S is formed at one side of the fixing member 42 in contact with the mounting surface 41 of the heater unit mounting table 40, and is bound to the heater unit mounting table 40 through the slit S. The pair of fixing members 42 are fixed to the mounting surface 41 by bolts 43, and the slit S may be used to adjust the space between the fixing members 42. Molded product joining device.
The method of claim 1,
The heater unit 2,
A plate-shaped heat transfer plate 20 that applies heat to the bonding surfaces S1 and S2;
And at least one heater (22R, 22L) installed to be in contact with the side surface of the heat transfer plate (20) to apply heat to the heat transfer plate (20).
The method of claim 2,
The heat transfer plate 20 is a foamed resin molded article bonding apparatus, characterized in that formed in the width (W2) corresponding to the width (W1) of the bonding surface (S1, S2) of the foamed resin molded article (P1, P2) to be bonded.
The method of claim 2,
Foaming molded article bonding apparatus, characterized in that the receiving space 200 is divided into a plurality of interior of the heat transfer plate 20, each receiving space 200 is filled with heat medium oil (Heating medium oil, 202).
The method according to claim 2 or 4,
A portion of the central portion of the heat transfer plate 20 protrudes to one side, and a predetermined bending portion 210 is formed.
The method according to claim 2 or 4,
One or more reinforcing material mounting holes 220 are formed in the heat transfer plate 20, and the steel reinforcing material 230 is detachably attached to the reinforcing material mounting hole 220 for reinforcing the joint portion of the foamed resin molded articles P1 and P2. Foamed resin molded article bonding apparatus characterized in that the binding.
The method of claim 2,
The heaters (22R, 22L) is a foamed resin molded article joining device, characterized in that the installation facing the heat transfer plate 20 in contact with both side portions of the heat transfer plate (20).
The method of claim 1,
The left and right transfer unit 3,
Transfer table 30 including a bottom plate 31, the side support 32 on both sides of the bottom plate 31, and the support shaft 36 is installed so that both ends are supported on both side support (32) Wow;
And a linear guide block (38) mounted to the bottom surface of the bottom plate (31) and moving the standby position and the heating position along the rail (37) on the base (B). Splicing device.
delete The method of claim 1,
Foamed resin molded article bonding apparatus characterized in that a plurality of heat dissipation vent holes (H) are formed in the heater unit mounting table (40) and the support (44).
delete The method of claim 1,
A controller 6 for controlling the temperature of the heater unit 2; further includes,
Bonding device of the foamed resin molded article, characterized in that the heating temperature of the bonding surface (S1, S2) is heated through the heater unit (2) is between 130 ℃ ~ 220 ℃.
delete A loading step of loading the bonding surfaces S1 and S2 of the two bonding object foamed resin molded products P1 and P2 facing each other with the central cutout 10 of the table 1 interposed therebetween;
Joining the heater unit 2 heated to a specific temperature and mounted with the steel reinforcement 230 between the joining surfaces (S1, S2) disposed facing the joining surface (S1, S2) facing the heater unit (2) Joining the foamed resin molded articles (P1, P2) to be in contact with both side portions of the molten joining surface (S1, S2), the steel material on the joining surface (S1, S2) side facing the steel reinforcement 230 A heating step for inserting a part of the reinforcing material 230; And
The bonding target foamed resin molded products P1 and P2 are moved so that the joining surfaces S1 and S2 are spaced apart from the heater unit 2, and the heater units 2 entered between the joining surfaces S1 and S2 are retracted. After the two molten joint surface (S1, S2) is in close contact with each other to bond the two bonded resin foam molded articles (P1, P2), the other part of the steel reinforcing material 230 is the opposite joint surface (S1, S2) bonding step of bonding so as to be embedded in the side; foamed resin molded article comprising a.
The method of claim 14,
Bonding method of the foamed resin molded article, characterized in that the heating temperature of the bonding surface (S1, S2) in the heating step is between 130 ℃ ~ 220 ℃.

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