KR20200021178A - Heat welding apparatus for joining upper and lower cap of float, and float manufacturing method using the same - Google Patents

Abstract

The present invention relates to a thermal welding apparatus for bonding upper and lower caps of float and a method for manufacturing float using the same, which are capable of improving productivity. The thermal welding apparatus for bonding upper and lower caps of float of the present invention comprises: a worktable; a lower cap seating fixing unit having a lower cap; a heating melting unit having upper and lower heating plates; and an upper cap seating fixing unit having an upper cap.

Description

Heat welding device for upper and lower cap bonding of floats and float manufacturing method using the same {HEAT WELDING APPARATUS FOR JOINING UPPER AND LOWER CAP OF FLOAT, AND FLOAT MANUFACTURING METHOD USING THE SAME}

The present invention relates to a heat welding apparatus for joining a top and bottom cap of a float and a float manufacturing method using the same, and more specifically, to the top and bottom caps of a plastic float having a pair of two-component configurations, the inner and outer diameters of the sides of the joint are thermally welded ( 접합 着) The simple bonding process enables not only to increase the efficiency of joining, but also to increase the productivity, to reduce the manufacturing time, and to reduce the manufacturing cost while manufacturing in the form of maintaining the uniform quality and weight. It relates to a heat welding device for joining the upper and lower caps of a float and a float manufacturing method using the same.

In general, a float sensor is installed inside a storage tank in which a liquid material such as water, oil, or chemicals is stored to detect the level of a liquid material. The float sensor is electrostatic, magnetic, or mechanical depending on the electromagnetic device installed on the float. , Ultrasonic classification.

The float sensor is also referred to as a level sensor or a water level sensor, and can be expected to have stable switch operation due to less influence on use conditions such as temperature, pressure, and specific gravity, and is widely used in various industrial fields.

Such a float sensor basically includes a float for providing buoyancy (also called “bure”). The float may be a metal structure or a plastic structure depending on the liquid material and the industrial field.

Accordingly, the present invention is to propose a technique related to a float by a plastic material structure, and to improve the problems related to the manufacturing technology of the conventional plastic material float.

As shown in FIG. 1, a conventional plastic float 1 is formed in a pair of upper and lower configurations, and is a pair of two-component couplings, each having a cap shape that is symmetrical to each other, but having a ring-shaped structure having an inner and outer diameters. (2) and the lower cap (3).

In this case, the magnet may be inserted into the lower cap 3 so as to detect the water level using a magnet as necessary.

The conventional plastic float 1 is manufactured in the form of foam molding of polypropylene resin using an injection mold.

However, the conventional plastic float has a problem that the foam molding is often wrong, the productivity is lowered, the manufacturing cost is large, the quality of the float to be produced is different and the weight is different.

As a result, the buoyancy difference is generated due to the weight deviation of the float body, making it difficult to accurately detect the water level, and even the float itself does not float on the liquid material.

On the other hand, in relation to the conventional float manufacturing technology, Korean Patent No. 10-0515933 proposes and discloses a foam float manufacturing method for manufacturing a foam float by foam molding using polypropylene glycol, 2012-0057591 proposes and discloses a float manufacturing method for forming a float by molding a shell having a hollow and then filling a foamable resin of styrofoam and urethane foam.

Republic of Korea Patent Publication No. 10-0515933 Republic of Korea Patent Publication No. 10-2012-0057591

SUMMARY OF THE INVENTION The present invention has been made in view of solving the above-mentioned conventional problems, and in view of the above, the inner and outer diameters of the side surfaces of the plastic joints having a pair of two-component plastic floats are easily heated and heat-sealed. Heat treatment for the upper and lower cap joining of floats to reduce the cost of manufacturing while maintaining the quality and weight of the product, and to increase the productivity, reduce the production time, and improve the joining efficiency. It is an object of the present invention to provide a welding apparatus and a float manufacturing method using the same.

The present invention is provided with a top and bottom cap by injection molding a synthetic resin, such as polypropylene (PP), polyvinylidene fluoride (PVDF), polyethylene (PE), ABS resin excellent in moldability and processability, It is an object of the present invention to provide a heat welding apparatus for joining upper and lower caps of a float, and a float manufacturing method using the same, so that a plastic float of one body can be easily manufactured by welding.

Heat welding device for joining the upper and lower caps of the float according to the present invention for achieving the above object, consisting of a ring-shaped upper cap and lower cap having an inner and outer diameter, but used to manufacture a plastic float of a pair configuration consisting of two pairs In the heat welding apparatus for the upper and lower cap bonding of the float for bonding by heat welding to the inner and outer diameter side joining surface of the upper cap and the lower cap, the worktable; A lower cap seating fixing part fixedly installed at a predetermined height of the upper surface of the work table and provided to be seated on a lower cap; Is installed on the workbench and provided to move forward and backward, located on the upper side of the lower cap seat fixing portion, but located at the rear (後方) of the lower cap seat fixing portion during the initial installation, spaced at the upper and lower sides A heat melting part having an upper heat plate and a lower heat plate for melting by contacting a bonding surface of the upper cap and the lower cap to apply heat; The upper cap is installed on the upper side of the heating molten part and provided to be elevated and facing the lower cap seating fixing part, and is installed to press and press the upper surface of the heating molten part when descending, and the upper cap is provided to seat the upper cap. Settlement fixing; characterized in that it comprises a.

Here, the lower cap seating fixing portion, the base plate fixedly disposed on the upper surface of the workbench; A pillar portion installed upright on an upper surface of the base plate; A flat plate fixedly coupled to an upper surface of the pillar portion; A lower cap seating fixing block fixedly coupled to a center of an upper surface of the flat plate and having a seating groove for seating a lower cap; A lifting shaft positioned in a seating groove of the lower cap seating fixing block, the lifting shaft being installed upright by a pneumatic cylinder side driving fixedly coupled to a lower surface of the flat plate; the lower cap seating fixing block includes the flat plate. It may be configured to include a fixed block fixedly coupled to the upper surface, and a movable block which is provided as a detachable body to the fixed block and is movable forward and backward on the fixed block by the driving of the pneumatic cylinder.

Here, the heating molten portion, the rail portion is spaced on the left and right sides of the fixed coupling and the lower cap seating fixing portion on the upper surface of the worktable; A rail coupling portion supported on the rail portion and provided to move forward and backward on a worktable; A forward and backward cylinder fixedly coupled to an upper surface of the work table to control forward and backward movement of the rail coupling part; A connection pillar that is supported and coupled to an upper surface of the rail coupling part and is installed uprightly movable downward when an external force is applied by pressing pressure; A hot plate fixing plate which is fixedly coupled to the upper surface of the connection column and horizontally disposed and is positioned above the lower cap seating fixing unit; An elastic spring inserted into the connection pillar to elastically support the elastic spring to return to its original position with respect to the connection pillar moved downward when the external force is released by pressing; An upper heat plate fixedly coupled to an upper surface of the hot plate fixing plate and provided to be in contact with an upper surface of the upper surface to be joined to an upper surface of the upper cap seating fixing part; And a lower heating plate fixedly coupled to a lower surface of the hot plate fixing plate and having a lower surface in contact with a bonding surface of the lower cap seated on the lower cap seating fixing unit to apply heat.

Here, the upper cap seating fixing portion, the holding portion is installed upright on both sides of the upper surface of the workbench; A top plate fixedly coupled to an upper surface of the support part and disposed horizontally; An elevating plate provided to elevate through an elevating cylinder fixedly coupled to a lower surface of the upper plate; A fixed plate fixedly coupled to a lower surface of the elevating plate; An upper cap seating fixing block fixedly coupled to a lower surface center of the fixing plate and having a seating groove for seating the upper cap; Protrudingly disposed on both sides of the lower surface of the fixing plate, the pressing pin portion is provided to press the upper surface of the heating molten portion during the lowering of the elevating plate; The upper cap seating fixing block is fixed fixedly coupled to the lower surface of the fixing plate The block and the fixed block may be configured to include a movable block which is provided as a detachable body and is provided to be moved forward and backward on the fixed block by driving a pneumatic cylinder.

In addition, the float manufacturing method using the heat welding apparatus according to the present invention for achieving the above object, the injection-molded upper cap and lower cap of the ring shape having an inner and outer diameter is provided as a pair of dividing body but the upper cap and the lower A float manufacturing method for manufacturing a plastic float by integrally combining a cap, the method comprising: (A) injection molding a synthetic resin raw material to include a ring-shaped plastic upper and lower caps having an inner and outer diameters; (B) The upper cap and the lower cap is disposed on the heat welding device, the lower cap seating fixing portion and the upper cap seating fixing side lower cap seat fixing block and upper cap seating fixing block has a lower cap in each seating groove Placing the upper caps on the upper and lower sides, respectively, and arranging the joining surfaces to face each other; (C) the heat by contacting the upper heat plate to the bonding surface of the upper cap seating fixing block of the heat welding device and the upper cap seated on the lower cap seating fixing block and the lower heating plate to the bonding surface of the lower cap. Applying to melt each joining surface; (D) The upper cap seating fixing side of the heat welding device is in close contact with the upper cap seating fixing block on the lower cap seating fixing side lower cap seating fixing block to contact the molten joint surface of the upper cap and the lower cap and the contact state for a certain time Comprising the steps to complete the plastic material float by maintaining the; includes, in the step (A) polypropylene (PP), polyvinylidene fluoride (PVDF), excellent moldability and processability to the synthetic resin raw material, Any one or more selected from polyethylene (PE) and ABS resin are used; In the step (C), each bonding surface is melted by applying heat for 3 seconds to 5 seconds at a temperature of 180 ° C to 250 ° C according to the synthetic resin raw material; In the step (D), by holding and curing the contact state for 5 to 7 seconds in a state in which the molten bonding surface of the upper cap and the lower cap is in contact with each other to complete a plastic material float in which the upper cap and the lower cap are integrally combined. It is done.

Here, in the step (C), the step of placing the heat-melting portion between the lower cap seat fixing and the upper cap seating fixing unit by driving the forward and backward cylinder of the heating side of the heat welding apparatus; The upper cap seating fixing block and the pressing pin part fixed to the elevating plate by lowering the elevating plate by lowering and driving the elevating cylinder on the upper cap seating fixing side press the upper heat plate while pressing the upper heating plate to the upper surface of the upper heating plate. Making; The lower heating plate is lowered to the upper surface of the lower cap seating fixing block while lowering and moving the connecting column, which is elastically supported by the elastic spring, by pressing and pressing the heating melt through continuous lowering driving of the elevating cylinder. Close contact; Heating the upper side heat plate and the lower side heat plate to a predetermined temperature to melt the respective joint surfaces of the upper cap and the lower cap to have a molten joint surface; can be configured to include.

Here, in the step (D), while lowering the lift plate by driving the lifting cylinder of the upper cap seating fixing portion, the lifting shaft is raised in the seating groove of the lower cap seating fixing block lower cap seating fixing block Protruding an upper portion over an upper surface of the; The upper cap and the lower cap by closely contacting the upper cap seat fixing block side upper cap seat fixing block with the lower cap seat fixing stationary side lower cap seat fixing block while the upper portion of the lifting shaft protrudes over the upper surface of the lower cap seat fixing block. Contacting the molten bonding surfaces of the; Comprising the step of completing the plastic float in which the upper cap and the lower cap is integrally bonded by maintaining and curing the contact state of the upper cap and the lower cap through the lifting shaft to maintain and cure the contact state for a predetermined time; The upper cap seating fixing side lift cylinder is driven upward to release contact with the lower cap seating fixing block with respect to the upper cap seating fixing block so that the plastic material float in which the upper cap and the lower cap are integrally combined is separated from the lower cap seating fixing block. And removing and returning the lift shaft to its original position.

According to the present invention, the upper and lower caps of a plastic float having a pair of two-component configurations can be easily bonded by internal welding on the inner and outer sides of the mutually joined portions by a thermal welding technique, thereby completing the float, and for automatic production. By this, it is possible to increase the productivity, reduce the manufacturing time, and achieve a useful effect of reducing the manufacturing cost while maintaining a uniform quality and weight.

The present invention is provided with a top and bottom cap by injection molding, by bonding the joint of the top and bottom caps by heat welding can easily manufacture a plastic float formed of a single body, useful to minimize the occurrence of product defects Effect can be achieved.

1 is a block diagram showing a plastic float.
Figure 2 is a front view showing a heat welding apparatus for the upper and lower cap bonding of the float according to an embodiment of the present invention.
Figure 3 is a perspective view of the main part showing the heat welding device for the upper and lower cap bonding of the float according to an embodiment of the present invention.
Figure 4 is an operating state diagram showing a heating molten state in the heat welding device for the upper and lower cap bonding of the float according to an embodiment of the present invention.
5 is a block diagram showing an upper cap seating fixing block and a lower cap seating fixing block in the heat welding device for the upper and lower cap bonding of the float according to an embodiment of the present invention.
Figure 6 is a schematic process diagram showing a float manufacturing method using the heat welding device for the upper and lower cap bonding of the float according to an embodiment of the present invention.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings, and the detailed description will provide a better understanding of the purpose, configuration, and features thereof.

The heat welding apparatus 100 for upper and lower cap bonding of a float according to an embodiment of the present invention is an apparatus used to manufacture a plastic material float 1 as a buoyancy body as shown in FIG. However, it is a device for joining against each other in a state in which a heat is applied to the inner and outer diameter portions of the bonding surface side of the upper cap 2 and the lower cap 3 which are provided for two minutes.

At this time, the upper cap (2) and the lower cap (3) having a body which is divided into two pairs and provided and mutually symmetrical has a magnet mounting space so that the ring-shaped magnet can be inserted into the ring shape having an inner and outer diameters, respectively. .

The upper and lower cap joining heat welding apparatus 100 of the float according to an embodiment of the present invention, as shown in Figure 2 to 5, the worktable 110, the lower cap seating fixing part 120, the heating melting part 130 , The upper cap seating fixing portion 140 is made up of a configuration comprising.

The work table 110 is provided to have a work height through the seating arrangement of the upper cap and the lower cap as provided to have a predetermined height.

The lower cap seating fixing part 120 is fixedly installed to be positioned at a predetermined height of the upper surface of the work table 110, and is provided to be seated and disposed on the plastic lower cap 3 constituting the float 1.

To this end, the lower cap seating fixing part 120 is a base plate 121 fixed to the upper surface of the work table 110, the pillar portion 122 is installed upright on the upper surface of the base plate 121, A lower plate having a flat plate 123 fixedly coupled to an upper surface of the pillar portion 122, and a seating groove 124a for fixedly coupling to a central portion of the upper surface of the flat plate 123 and for seating the lower cap 3. The cap seating fixing block 124 and the lower cap seating fixing block 124 are located in the seating grooves of the first pneumatic cylinder 126, which is fixedly coupled to the bottom surface of the flat plate 123, and can be lifted upright. It can be configured to include the lifting shaft 125 is installed.

The pillar portion 122 is formed of four pillars for stable placement of the flat plate 123.

The lower cap seating fixing block 124 is provided with a fixed block 124A fixedly coupled to the upper surface of the flat plate 123, and a body detachable to the fixing block 124A and of the second pneumatic cylinder 127 It is configured to include a moving block 124B which is provided to be moved forward and backward on the fixed block 124A by driving.

The fixed block 124A and the moving block 124B are provided to have a semi-circular seating groove structure that is responsible for the half to each other to form a circular seating groove 124a, and through the driving of the second pneumatic cylinder 127 By arranging the moving block 124B forward, the clamping process may be performed to more stably support the lower cap 3 disposed in the seating groove 124a.

At this time, the lower cap seating fixing block 124 may be installed at least one on the upper surface of the flat plate 123, can be formed at least two mounting grooves (124a) per installation, which can increase productivity It is desirable to have a configuration.

The lifting shaft 125 is provided to be inserted into the hollow forming the inner diameter of the upper cap (2) and the lower cap (3) having a ring-shaped structure is responsible for providing a support force when placing them, and heat It serves to eliminate the phenomenon that a burr (burr) is generated in the inner surface portion of the bonding surface side of the upper cap 2 and the lower cap 3 to be welded.

An upper surface edge of the flat plate 123 is provided with a support pin portion 129 protruding upward, and the lower heating plate 138 is lowered by adjusting the lower side of the lower cap seating block 124. When it is in contact with, it can be configured to support the lower surface of the lower heating plate 138, it can function as a lower movement control means for regulating the lower movement of the heating molten portion 130.

The heating molten part 130 is installed on the worktable 110 and provided to move forward and backward, and is located on the upper side of the lower cap seat fixing part 120, but the lower cap seat fixing part at the initial installation ( Located at the rear of the 120, the upper heat plate 137 and the lower heat plate for fusion treatment by applying heat to be spaced on the upper and lower sides and in contact with the bonding surface of the upper cap (2) and the lower cap (3) (138).

Specifically, the heating molten portion 130 is fixed to the upper surface of the work table 110 and the rail portion 131 disposed on the left and right sides of the lower cap seating fixing portion 120 and the rail portion 131 on the The rail coupling part 132 is supported and coupled to the worktable 110 to move forward and backward, and is fixedly coupled to the upper surface of the worktable 110, and the forward and backward movements to control the forward and backward movement of the rail coupling portion 132. The cylinder 133 and the coupling pillar 134 which is supported and coupled to the upper surface of the rail coupling portion 132 are installed upright to be movable downward when the external force is applied by pressing and the coupling pillar 134. Hot plate fixing plate 135 and horizontally coupled to the upper surface of the lower cap seating fixing part 120 and inserted into the connecting column 134 is elastically supported by pressing When releasing external force by The elastic spring 136 to return to the original position relative to the connecting column 134, and the upper cap fixedly coupled to the upper surface of the hot plate fixing plate 135 and seated on the upper cap seating fixing portion 140 ( 2) a lower cap disposed on the lower cap seating fixing part 120 and fixedly coupled to the lower surface of the upper heat plate 137 and the lower plate fixing plate 135 provided to contact the upper surface to apply heat. It can be configured to include the lower heating plate 138 provided to contact the lower surface in contact with the bonding surface (3) to apply heat.

The rail unit 131 may be provided with two LM guides disposed on the left and right sides, and the rail coupling unit 132 may be provided to move forward and backward in the form of coupling the LM block to the LM guide. And including a coupling body coupled on the LM block is provided to install the connection pillar 134 to the upper surface.

The connecting pillar 134 is formed of four connecting pillars for stable placement of the hot plate fixing plate 135.

The upper heat plate 137 and the lower heat plate 138 are provided to adjust the heat applied according to the formation material of the upper cap 2 and the lower cap 3, respectively.

The upper cap seating fixing unit 140 is installed on the upper side of the heating melter 130 and provided to be elevated and disposed to face each other with the lower cap seating fixing unit 120, and when heated, the heating molten unit ( 130 is installed to press and press the upper surface, and is provided so that the seating arrangement of the plastic upper cap (2) constituting the float (1).

To this end, the upper cap seating fixing part 140 is positioned on both sides of the upper surface of the work table 110, the uprights and the support portion 141 is installed, and fixedly coupled to the upper surface of the support portion 141 is horizontally arranged An elevating plate 143 provided to be elevated by an elevating cylinder 144 that is fixedly coupled to an upper plate 142, a lower surface of the upper plate 142, and a fixed plate fixedly coupled to a lower surface of the elevating plate 143 ( 145, an upper cap seating fixing block 146 fixedly coupled to a center of a lower surface of the fixing plate 145, and having a seating groove 146a for seating and placing the upper cap 2, and a lower surface of the fixing plate 145. It may be configured to include a pressing pin portion 147 disposed protruding at both edges and provided to press and press the upper surface of the heating molten portion 130 when the lifting plate 143 is lowered.

The support portion 141 is formed of four pillars for the stable arrangement of the top plate 142.

The upper cap seating fixing block 146 is provided with a fixing block 146A fixedly coupled to the bottom surface of the fixing plate 145 and a body detachable to the fixing block 146A and driving of the third pneumatic cylinder 148. Through the fixed block 146A is configured to include a movable block 146B which is provided to move forward and backward.

The fixed block 146A and the moving block 146B are provided to have a semi-circular seating groove structure that is responsible for the half to each other to form a circular seating groove 146a, and through the driving of the third pneumatic cylinder 148 By advancing the moving block 146B, the clamping process may be performed to more stably support the upper cap 2 seated in the seating groove 146a.

At this time, the upper cap seating fixing block 146 can be installed at least one on the lower surface of the fixing plate 145, can be formed at least two seating grooves (146a) per installation, configuration that can increase the productivity It is desirable to have.

The lower cap seating fixing block 124 and the upper cap seating fixing block 146 are provided in a corresponding position and number.

On the other hand, with reference to Figures 1 to 6 with respect to the float manufacturing method for producing a plastic material float (1) using the heat welding device 100 for the upper and lower cap bonding of the float according to the present invention having such a configuration as described above. It will be described below, it will be described with the operation and action for the heat welding device 100 for the upper and lower cap bonding of the float according to the present invention.

Plastic material float (1) manufacturing method using the heat welding device 100 for the upper and lower cap bonding of the float according to the present invention is provided with an upper cap and a lower cap (S10), the upper cap and lower cap seating arrangement step (S20), Joining surface melting step (S30) of the upper cap and the lower cap, consisting of a configuration comprising a molten bonding surface bonding step (S40) of the upper cap and the lower cap.

The upper cap and the lower cap provided step (S10) is a body for forming an arrangement space of the magnet in the form of a ring having an inner and outer diameter by injection molding of synthetic resin raw material, the upper part for constituting the float (1) as shown in FIG. It is a step having a cap (2) and the lower cap (3).

At this time, the upper cap (2) and the lower cap (3) is polypropylene (PP), polyvinylidene fluoride (PVDF), polyethylene (PE), ABS resin to ensure durability and excellent moldability and processability It can comprise with any 1 type or mixed composition selected from these.

The upper cap and the lower cap seating arrangement step (S20) is located on the upper and lower sides of the heat welding apparatus 100 having the above-described configuration, the lower cap seating fixing part 120 and the upper cap seating fixing part 140 side installed The lower cap 3 and the upper cap 2 are placed in each of the seating grooves 124a and 146a of the lower cap seating fixing block 124 and the upper cap seating fixing block 146, respectively. In this step, the joining surfaces face each other.

At this time, the upper cap 2 is disposed in the seating groove 146a of the upper cap seating fixing block 146, but the bonding surface is disposed to face downward, the lower cap 3 is the lower cap seating fixing block 124 It is disposed in the seating groove 124a of the) but the bonding surface is directed upward.

Here, when the lower cap seating fixing block 124 and the upper cap seating fixing block 146 has a configuration having moving blocks 124B, 146B, the lower cap seating fixing part 120 in the second By driving the pneumatic cylinder 127 to advance the moving block 124B to clamp the lower cap (3) seated in the seating groove 124a to more stably support, in the upper cap seating fixing portion 140 By driving the third pneumatic cylinder 148 to move forward the moving block 146B is clamped to more stably support the upper cap (3) seated in the seating groove (146a).

The bonding surface melting step (S30) of the upper cap and the lower cap is disposed on the upper cap seating fixing block 146 and the lower cap seating fixing block 124 of the heat welding apparatus 100 and are in a state facing each other. The upper heat plate 137 and the lower heat plate 138 are in contact with each bonding surface of the upper cap 2 and the lower cap 3 to apply heat to melt each bonding surface.

In detail, in the bonding surface melting step (S30) of the upper cap and the lower cap (S30), since the heating molten part 130 is located at the rear side of the work table 110 at the time of initial installation, the lower cap by driving the forward and backward cylinder 133 forward The heating melting part 130 is positioned between the seating fixing part 120 and the upper cap seating fixing part 140.

The upper cap seating fixing block 146 and the pressing pin part 147 fixed to the elevating plate 143 by driving the elevating cylinder 144 of the upper cap seating fixing unit 140 to lower the elevating plate 143. Presses and presses the upper side heat plate 137 while being in close contact with the upper surface of the upper side heat side plate 137 on the heat-melting part 130.

At this time, the bonding surface facing the lower direction of the upper cap 2 seated on the upper cap seating fixing block 146 is in contact with the upper surface of the upper heat plate (137).

Pressing and pressing the heating molten portion 130 by the continuous lowering drive of the lifting cylinder 144, while moving the connecting column 134 elastically supported by the elastic spring 136 to the rail coupling portion 132 side The lower heat plate 138 is in close contact with the upper surface of the lower cap seat fixing part 120 side lower cap seat fixing block 124.

At this time, the bonding surface facing the upper direction of the lower cap 3 seated on the lower cap seating fixing block 124 is in contact with the lower surface of the lower heating plate 138.

Thus, the contact surface of the upper hot plate 137 on the heating melter 130 side and the upper cap 2 seated on the upper cap seating fixing block 146 is brought into contact with each other, and the lower hot plate 138 on the hot melter 130 side. ) And the upper cap plate 137 and the lower cap plate 138 are heated to a predetermined temperature in contact with the bonding surface of the lower cap 3 seated on the lower cap seating fixing block 124. ) And each bonding surface of the lower cap 3 to have a melt bonding surface.

At this time, the upper heat plate 137 and the lower heat plate 138 is set to be heated under the same temperature conditions, and the raw material of the synthetic resin such as polypropylene (PP), polyvinylidene fluoride (PVDF), polyethylene (PE), ABS resin It may vary.

Here, the upper heat plate 137 and the lower heat plate 138 may vary depending on the melting point of the synthetic resin raw material, the upper cap (2) by applying heat for 3 to 5 seconds at a temperature of 180 ℃ to 250 ℃ And each joint surface of the lower cap 3 are melted simultaneously.

When the melting process for each joining surface of the upper cap (2) and the lower cap (3) is completed, the lifting cylinder 144 of the upper cap seating fixing portion 140 is driven up to drive the upper heat plate 137 and the lower heat plate ( 138) Release the close contact and return to the initial position.

By driving the forward and backward cylinder 133 backward, the hot melt part 130 is returned to the initial position.

At this time, the lower cap seating fixing part 120 side lower cap seating fixing block 124 and the upper cap seating fixing part 140 side upper cap seating fixing block 146 are facing each other.

Melting joint surface coupling step (S40) of the upper cap and the lower cap is driven to lower the lifting cylinder 144 of the upper cap seating fixing portion 140 to control the lifting plate 143, the upper cap seating fixing block ( 146) in close contact with the lower cap seating fixing block 124 to keep the molten joint surface of the upper cap 2 and the lower cap 3 in contact and to maintain a contact state for a predetermined time, thereby integrally joining the plastic material float 1. This is the stage to complete.

In detail, when the elevating plate 143 is lowered by driving the elevating cylinder 144 of the upper cap seating fixing unit 140, the first pneumatic cylinder 126 is driven to lower the elevating shaft 125 by the lower cap. It is to be raised in the mounting groove 124a of the fixed block 124.

At this time, the lifting shaft 125 is located in the seating groove 124a of the lower cap seating fixing block 124 is raised, the upper portion is projected above the upper surface of the lower cap seating fixing block 124.

The upper cap seating fixing block 146 of the upper cap seating fixing unit 140 is lower cap seating fixing unit 120 in a state in which an upper portion of the elevating shaft 125 protrudes from the upper surface of the lower cap seating fixing block 124. By close contact with the lower cap seating fixing block 124 of the molten bonding surface of the upper cap (2) and the lower cap (3) is in contact.

At this time, the lifting shaft 125 is inserted into the hollow forming the inner diameter of the upper cap 2 seated on the upper cap seating fixing block 146 to move downward to support the upper cap (2), It functions to keep the close contact between the upper and lower caps (2) and the lower cap (3) without distortion, and to remove the occurrence of burrs on the side of the joints. Guided.

The upper cap 2 and the lower cap by maintaining and curing the contact state for 5 to 7 seconds while the molten joint surface of the upper cap 2 and the lower cap 3 are contacted using the lifting shaft 125. 3) to complete the plastic float (1) is integrally bonded.

Subsequently, the lifting cylinder 144 of the upper cap seating fixing unit 140 is driven up again to release the upper cap seating fixing block 146 from the lower cap seating fixing block 124 to release the upper cap seating fixing block 124. The plastic cap 1 having the lower cap 3 integrally coupled thereto is taken out from the lower cap seating fixing block 124.

At this time, the lower cap seating fixing block 124 and the upper cap seating fixing block 146 reverse the movable blocks 124B and 146B, respectively, to release the clamping of the outer surface of the float 1 and the elevating shaft 125. The lower cap seat fixing block 124 with respect to the upper cap seat fixing block 146 by driving up and down the lifting cylinder 144 of the upper cap seat fixing part 140 while supporting the inner diameter of the furnace float 1. Release the contact with the lifting shaft 125, the lowering control to return to the original position.

Accordingly, in the present invention, the inner and outer diameters of the side portions of the plastic joints 1 having a pair of two-component plastic floats 1 are easily bonded by a thermal welding technique. It is possible to complete the float, make the joining efficiency by automatic production, minimize the defects, increase the productivity, reduce the manufacturing time and maintain the uniform quality and weight. It can provide the advantage of reducing the manufacturing cost.

The embodiments described above are merely illustrative of the preferred embodiments of the present invention and are not limited to these embodiments, and various modifications and variations are made by those skilled in the art within the spirit and scope of the present invention. This may be done, which will belong to the technical scope of the present invention.

1: float 2: upper cap
3: lower cap 100: heat welding apparatus
110: worktable 120: lower cap seating fixing
130: heating molten part 140: fixing upper cap

Claims (7)

It is used to manufacture a pair of plastic material float consisting of a ring-shaped upper cap and a lower cap having an inner and outer diameters, which is bi-coupled, and is thermally welded to the inner and outer diameter side surfaces of the upper cap and the lower cap. In the heat welding device for the upper and lower cap bonding of the float,
bench;
A lower cap seating fixing part fixedly installed at a predetermined height of the upper surface of the work table and provided to seat the lower cap;
It is installed on the workbench and is provided to move forward and backward, and is located on the upper side of the lower cap seat fixing part, but is located at the rear of the lower cap seat fixing part at the initial installation, and is spaced on the upper and lower sides. A heat melting part having an upper heat plate and a lower heat plate for melting by contacting a bonding surface of the upper cap and the lower cap to apply heat;
The upper cap is installed on the upper side of the heating molten part and provided to be elevated and facing the lower cap seating fixing part, and is installed to press and press the upper surface of the heating molten part when descending, and the upper cap is provided to be seated and disposed. Settling government; Heat welding device for the upper and lower cap bonding of the float, comprising a. The method of claim 1,
The lower cap seating fixing portion,
A base plate fixedly disposed on an upper surface of the work table;
A pillar portion installed upright on an upper surface of the base plate;
A flat plate fixedly coupled to an upper surface of the pillar portion;
A lower cap seating fixing block fixedly coupled to a center of an upper surface of the flat plate and having a seating groove for seating a lower cap;
A lifting shaft positioned in a seating groove of the lower cap seating fixing block and installed upright by a first pneumatic cylinder side driving fixedly coupled to a bottom surface of a flat plate;
A support pin part protruding upward from an upper edge of the flat plate; Including;
The lower cap seating fixing block,
And a fixed block fixedly coupled to the upper surface of the flat plate, and a movable block provided as a detachable body to the fixed block and movable forward and backward on the fixed block through the coupling of a second pneumatic cylinder. Heat welding device for upper and lower cap bonding. The method of claim 1,
The heating melting part,
Rail parts disposed on the left and right sides of the fixed coupling and the lower cap seating fixing portion on the upper surface of the worktable;
A rail coupling portion supported on the rail portion and provided to move forward and backward on a worktable;
A forward and backward cylinder fixedly coupled to an upper surface of the work table to control forward and backward movement of the rail coupling part;
A connection pillar that is supported and coupled to an upper surface of the rail coupling part and is installed uprightly movable downward when an external force is applied by pressing pressure;
A hot plate fixing plate which is fixedly coupled to the upper surface of the connection column and horizontally disposed and is positioned above the lower cap seating fixing unit;
An elastic spring inserted into the connection pillar to elastically support the elastic spring to return to its original position with respect to the connection pillar moved downward when the external force is released by pressing;
An upper heat plate fixedly coupled to an upper surface of the hot plate fixing plate, the upper heat plate being configured to apply heat by contacting an upper surface to a bonding surface of the upper cap seated on the upper cap fixing part;
A lower heating plate fixedly coupled to a lower surface of the hot plate fixing plate and provided with a lower surface in contact with a bonding surface of the lower cap seated on the lower cap seating fixing unit to apply heat; Heat welding device for the upper and lower cap bonding of the float comprising a. The method of claim 1,
The upper cap seating fixing portion,
A support portion installed upright on both edges of the upper surface of the work table;
A top plate fixedly coupled to an upper surface of the support part and disposed horizontally;
An elevating plate provided to elevate through an elevating cylinder fixedly coupled to a lower surface of the upper plate;
A fixed plate fixedly coupled to a lower surface of the elevating plate;
An upper cap seating fixing block fixedly coupled to a lower surface center of the fixing plate and having a seating groove for seating the upper cap;
Protruding pins are disposed on both sides of the lower surface of the fixing plate, the pressing pin portion provided to press and press the upper surface of the heating molten portion when the lifting plate descends; Including;
The upper cap seating fixing block,
Upper and lower parts of the float comprising a fixing part fixedly coupled to the lower surface of the fixing plate, and a movable part provided as a body detachable to the fixing part and capable of moving forward and backward on the fixing part through coupling of a third pneumatic cylinder. Heat welding device for cap bonding. In a float manufacturing method for manufacturing a plastic material float by injection molding the upper cap and the lower cap of the inner and outer diameter by injection molding provided as a pair of two-body body integrally combining the upper cap and the lower cap,
(A) injection molding the synthetic resin raw material having a ring-shaped plastic upper cap and lower cap having an inner and outer diameter;
(B) The upper cap and the lower cap is disposed on the heat welding device, the lower cap seating fixing portion and the upper cap seating fixing side lower cap seat fixing block and upper cap seating fixing block has a lower cap in each seating groove Placing the upper caps on the upper and lower sides, respectively, and arranging the joining surfaces to face each other;
(C) the heat by contacting the upper heat plate to the bonding surface of the upper cap seating fixing block of the heat welding device and the upper cap seated on the lower cap seating fixing block and the lower heating plate to the bonding surface of the lower cap. Applying to melt each joining surface;
(D) The upper cap seating fixing side of the heat welding device is in close contact with the upper cap seating fixing block on the lower cap seating fixing side lower cap seating fixing block to contact the molten joint surface of the upper cap and the lower cap and the contact state for a certain time Integrally holding the plastic material to complete the plastic float; Including;
In step (A), any one or more selected from polypropylene (PP), polyvinylidene fluoride (PVDF), polyethylene (PE), and ABS resin having excellent moldability and processability with respect to synthetic resin raw materials are used;
In the step (C), each bonding surface is melted by applying heat for 3 seconds to 5 seconds at a temperature of 180 ° C to 250 ° C according to the synthetic resin raw material;
In the step (D), by holding and curing the contact state for 5 to 7 seconds in a state in which the molten bonding surface of the upper cap and the lower cap is in contact with each other to complete a plastic material float in which the upper cap and the lower cap are integrally combined. Float manufacturing method using a thermal welding apparatus. The method of claim 5,
In the step (C),
Positioning the heat melting part between the lower cap seat fixing part and the upper cap seat fixing part by driving forward and backward the forward-side cylinder of the heat-melting part of the heat welding apparatus;
The upper cap seating fixing block and the pressing pin part fixed to the elevating plate by lowering the elevating plate by lowering and driving the elevating cylinder on the upper cap seating fixing side press the upper heat plate while pressing the upper heating plate to the upper surface of the upper heating plate. Making;
The lower heating plate is lowered to the upper surface of the lower cap seating fixing block while lowering and moving the connecting column, which is elastically supported by the elastic spring, by pressing and pressing the heating melt through continuous lowering driving of the elevating cylinder. Close contact;
Heating the upper and lower heating plates to a predetermined temperature to melt the joint surfaces of the upper cap and the lower cap to have a molten joint surface; Float manufacturing method using a heat welding apparatus comprising a. The method of claim 5,
In the step (D),
Controlling the elevating plate by lowering and driving the elevating cylinder of the upper cap seating fixing unit, and raising and lowering the elevating shaft in the seating groove of the lower cap seating fixing block to protrude an upper portion over the upper surface of the lower cap seating fixing block;
The upper cap and the lower cap by closely contacting the upper cap seat fixing block side upper cap seat fixing block with the lower cap seat fixing stationary side lower cap seat fixing block while the upper portion of the lifting shaft protrudes over the upper surface of the lower cap seat fixing block. Contacting the molten bonding surfaces of the;
Comprising the step of completing the plastic float in which the upper cap and the lower cap is integrally bonded by maintaining and curing the contact state of the upper cap and the lower cap through the lifting shaft to maintain and cure the contact state for a predetermined time;
The upper cap seating fixing side lift cylinder is driven upward to release the contact with the lower cap seating fixing block with respect to the upper cap seating fixing block, so that the plastic material float in which the upper cap and the lower cap are integrally coupled from the lower cap seating fixing block. Removing and returning the lift shaft to its original position by controlling the lowering; Float manufacturing method using a heat welding apparatus comprising a.

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