KR102181858B1 - Manufacturing method of injection molded product - Google Patents

Abstract

The present invention relates to an injection-molded product production method. More specifically, the present invention relates to an injection-molded product production method by which through automation, it is possible to more efficiently perform processes: taking out an injection-molded product from an injection-molding machine; fusing; and discharging. The method of the present invention comprises: a molding step of producing a molded product by an injection-molding machine; a withdrawing step of taking out and mounting the molded product from the injection-molding machine by using a robot arm; a discharge step of withdrawing an intermediate material previously drawn into a fusing machine by using the robot arm, and moving the same to a guide member; and a fusing step of inserting and fusing the molded product into the fusing machine by using the robot arm.

Description

Injection product manufacturing method {MANUFACTURING METHOD OF INJECTION MOLDED PRODUCT}

The present invention relates to a method for manufacturing an injection product, and more particularly, to a method for manufacturing an injection product that can more efficiently perform from drawing out an injection-molded product from an injection machine through automation to a fusion and discharge process.

In general, injection molding forms the center of a method of molding a thermoplastic resin by a plastic molding process. It can mold from very small ones to large ones weighing 10kg, and it can be mass-produced by repeatedly injection, so work efficiency is high.

The first step in injection molding is to add a pigment, a stabilizer, a plasticizer, a filler, etc. to the plastic to form a cylindrical or square-shaped chip of several mm, that is, put the compound in the hopper. There is a heating chamber right in front of the inlet, where it is heated with electric heat or high pressure steam.

For styrene resin or polyvinyl chloride, about 170°C, for polypropylene, about 200°C is heated appropriately depending on the material to make the plastic melt. This is injected into the mold through the inlet with a piston. When it flows into the corner of the mold, the piston returns to the right, and the mold splits in two pairs, pulling the hardened plastic out of the mold.

It can mold from very small ones to large ones weighing 10kg, and it can be mass-produced by repeatedly injection, so work efficiency is high. The molding pressure is 500~1,500kg/㎢. In recent years, a bakelite-based thermosetting resin was also devised to enable injection molding.

On the other hand, a conventional technology, Registration Patent No. 10-2031745 (hereinafter referred to as the prior art), relates to a 3D injection molding apparatus and an injection molding method. A supply unit for supplying a thermoplastic resin and a thermoplastic resin supplied from the supply unit are heated to form a molten resin. A heating unit that melts, an injection unit that injects the molten resin melted by the heating unit, a printing unit that forms a surface layer on the film surface, and an injection molded product from the molten resin injected from the injection unit, It includes a mold part that receives a film having a surface layer formed thereon from the printing part and transfers the surface layer of the film to the injection molded product, and the injection part receives a molten resin and injects it into the mold part, but evaporates gas from the molten resin before injection. By installing an injection module to discharge and remove the gas contained in the molten resin thoroughly, it is possible to manufacture injection molded products with high quality patterns, colors and textures by transferring the surface layer for expressing patterns, colors and textures along with injection molding. I made it possible.

However, this prior art has a problem that the process after injection is not efficient.

The present invention has been conceived to solve the above problem, and an object of the present invention is to provide a method for manufacturing an injection product that can more efficiently perform a fusion and discharge process from withdrawing a molded product from an injection machine through automation.

The present invention for the purpose of solving the above problems has the following configurations and features.

A molding step of manufacturing a molded product by an injection machine, a drawing step of taking the molded product out of the injection machine using a robot arm and placing it, a discharging step of drawing out an intermediate material previously introduced into the fusing machine using the robot arm and moving it to a guide member And a fusing step of inserting and fusing the molded article into the fusing machine using the robot arm.

The robot arm includes a detachable coupling part detachably coupled to the molded article and the intermediate member at a distal end, the detachable coupling part having a first width on one side and a first detachable coupling part provided with a first width on one side and the first width on the other side It may include a second detachable and detachable part having a smaller second width and provided.

In addition, the guide member is inclined downward, the front end is disposed on the side of the robot arm and the rear end is disposed on the side of the discharge member, and the discharging step is a coupling step of coupling the robot arm with an intermediate material previously introduced into the fusion machine, It may include a pushing step of moving the robot arm to move the intermediate member loaded on the guide member to the rear end, and a disassembly step of releasing the coupling of the intermediate member coupled to the robot arm and the robot arm.

The present invention having the above configuration and characteristics includes a take-out step, a discharge step, and a fusing step using a robot arm, so that from taking out the injection-molded molded product from the injection machine to the fusing and discharging process, etc. are more efficiently performed through automation. It has the effect of being able to do.

In addition, the present invention includes a first detachable and detachable part having a first width on one side of the robot arm and a second detachable and detachable part having a second width smaller than the first width on the other side, so that the first detachable and detachable part It has the effect of stably attaching and detaching molded articles having various sizes by simply rotating the detachable and detaching unit provided with the second detachable and detaching parts, and stably attaching and detaching a plurality of and a plurality of molded articles.

In addition, the present invention has the effect that the intermediate member can be moved from the robot arm to a long distance by including the guide member.

In addition, according to the present invention, since the discharging step includes a push step, the intermediate member on the guide member can be moved to the rear end side of the guide member by overcoming the frictional force generated between the guide member and the intermediate member on the guide member.

1 is a schematic flowchart illustrating a method of manufacturing an injection product according to an embodiment of the present invention.
2 is a view for explaining how to withdraw a molded product from an injection machine through a robot arm.
3 is a view for explaining mounting of a molded product drawn from an injection machine on a cradle.
4 is a view for explaining the withdrawal of the intermediate material previously drawn in the fusion machine through the robot arm.
5 is a view for explaining a robot arm combined with a molded article mounted on a cradle.
6 is a view for explaining that a molded product is inserted into a fusing machine.
7 is a view for explaining that a molded product is fused by a fusing machine.
8 is a view for explaining that the intermediate member on the guide member is pushed to the rear end of the guide member through the robot arm.
9 is a view for explaining a discharge member provided at the rear end of the guide member.
10 is a diagram showing a further embodiment of the present invention.

The present invention will be described in detail in the text of the bar, implementation (態樣, aspect) (or embodiment) that can apply various changes and can have various forms. However, this is not intended to limit the present invention to a specific form of disclosure, and it should be understood that all changes, equivalents, and substitutes included in the spirit and scope of the present invention are included.

The terms used in the present specification are only used to describe specific embodiments (sun, 態樣, aspect) (or examples), and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present application, terms such as ~include~ or ~consist~ are intended to designate the presence of features, numbers, steps, actions, components, parts, or a combination thereof described in the specification, but one or more other features It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof, does not preclude in advance the possibility of the presence or addition.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms as defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in this application. Does not.

The ~1~, ~2~, etc. described in the present specification will only be referred to to distinguish different constituent elements, and are not limited to the order of manufacture, and the names in the detailed description and claims of the invention It may not match.

Throughout this specification, when a part is said to be "connected" with another part, it is not only the case that it is "directly connected", but also "indirectly connected" or "electrically connected" with another element interposed therebetween. "Including the case.

FIG. 1 is a schematic flowchart illustrating a method of manufacturing an injection product according to an embodiment of the present invention, and FIG. 2 is a view for explaining withdrawing a molded product from an injection machine through a robot arm.

Hereinafter, a method for manufacturing an injection product according to an embodiment of the present invention will be referred to as'this method' for convenience of description.

Referring to Figures 1 and 2, the method (injection product manufacturing method) includes a molding step (S1), a drawing step (S2), a discharging step (S3), and a fusion step (S4).

The molding step (S1) is a step of manufacturing a molded product (MP) by the injection machine (1).

Exemplarily, the injection machine 1 may include a heating chamber for heating a resin or the like in a molten state, and a mold (eg, a mold) for molding the molten resin into a predetermined shape.

The injection machine 1 is commonly used in the relevant field, and a more detailed description thereof will be omitted.

3 is a view for explaining mounting of a molded product drawn from an injection machine on a cradle.

1 to 3, the withdrawal step (S2) is a step in which the molded product MP is withdrawn from the injection machine 1 using the robot arm 2 and mounted.

Exemplarily, the robot arm 2 has a base fixed to the floor (not shown), a shoulder portion connected to the base (not shown) at one end to rotate around a vertical axis (not shown), and one end being the shoulder portion An arm part (not shown) that is connected to the other end of (not shown) and rotates with a horizontal axis as a center axis, and one end is connected to the other end of the arm part (not shown), with the length direction of the arm part (not shown) as the center axis. It may include a rotating wrist (not shown) or the like.

In the robot arm 2, a base (not shown), a shoulder (not shown), an arm (not shown), a hand and abdomen (not shown), etc. may be interconnected in a manner commonly used in the field.

The robot arm 2 may include a detachable coupling part 21 (see FIG. 5 to be described later) detachably coupled to the molded product MP and the intermediate member IP at the distal end (the other end), and a wrist part (not shown) ) Is provided on the other end.

Here, one end may mean an end of the robot arm 2 at the base (not shown), and the other end may mean an end of the wrist portion (not shown) of the robot arm 2.

For example, when the molded product MP is manufactured in the injection machine 1, the injection machine 1 may discharge the molded product MP to the outside of the mold. At this time, in the withdrawal step (S2), the robot arm 2 rotates to move the detachable and detachable part 21 toward the molded product MP discharged from the injection machine 1, and the detachable and detachable part 21 is combined with the molded product (MP). After the molded product (MP) can be rotated to withdraw from the injection machine (1).

In the withdrawal step (S2), the robot arm 2 may be mounted by releasing the coupling between the detachable coupling part 21 and the molded product MP in order to perform the discharging step S3 to be described later. Exemplarily, in the withdrawal step (S2), the robot arm (2) transports the molded product (MP) to the cradle (HD), and then releases the coupling between the detachable coupling unit (21) and the molded product (MP) to the cradle (HD). Molded products (MP) can be mounted.

The detachable coupling unit 21 will be described in more detail in the following description.

In this method, the operation of the robot arm 2 can be controlled by a control signal from a control means (not shown), and the control means (not shown) will be described in more detail in the following description.

When the molding step (S1), the withdrawal step (S2), the discharging step (S3) to be described later, and the fusion bonding step (S4) to be described later of the present method are viewed as one cycle (current cycle), the withdrawal step (S2) of the current cycle Thereafter, the shaping step (S1) of the subsequent cycle performed after the current cycle may be performed again until the withdrawal step (S2) of the subsequent cycle.

4 is a view for explaining the withdrawal of the intermediate material previously drawn in the fusion machine through the robot arm.

1 to 4, the discharging step (S3) is a step of pulling out the intermediate material (IP) previously drawn into the fusing machine (4) using the robot arm (2) and moving it to the guide member (3).

In the discharge step (S3), the intermediate material (IP) previously introduced into the fusing machine (4) is a cycle of the molding step (S1), the drawing step (S2), the discharging step (S3) and the fusion bonding step (S4) described later in this method. In terms of (current cycle), the molded product (MP) introduced into the fusing machine (4) in the fusing step (S4) to be described later in the previous cycle (cycle prior to the current cycle) was fused and produced as an intermediate material (IP). have.

In the discharging step (S3), in order to introduce the molded product (MP) drawn out in the withdrawal step (S2) into the fusing machine (4) in the fusing step (S4) to be described later, It may be a step of removing the intermediate material (IP).

The fusing machine 4 will be described in more detail in the description of the fusing step S4 to be described later.

In the discharging step (S3), the intermediate material (IP) may be discharged to the guide member 3 and transported to the destination.

5 is a view for explaining the robot arm combined with the molded article mounted on the cradle, FIG. 6 is a view for explaining that the molded article is inserted into the fusing machine, and Figure 7 is for explaining that the molded article is fused by the fusing machine It is a drawing.

Referring to FIGS. 1 and 5 to 7, the fusing step (S4) is a step of inserting and fusing the molded article MP into the fusing machine 4 using the robot arm 2.

The molded product MP drawn out in the withdrawal step (S2) described above maintains the mounted state, and the fusing step (S4) includes the robot arm 2 (e.g., the detachable part 21) and the mounted molded product (MP). ) Is combined and transported to the fusing machine 4, and then the coupling between the robot arm 2 and the molded product MP can be released.

The fusing machine 4 may be a heat fusing machine as an example, and a plurality of molded products (MP) may be heat-fused to each other, or a molded product (MP) and another material (for example, a non-woven fabric) may be heat-fused to each other. .

Illustratively, the fusing machine 4 moves the jig part 41 for fixing the molded product MP, the hot plate part 42 for heating the welding part of the molded product MP, the jig part 41 and the hot plate part 42 The driving unit 43, the jig unit 41, the hot plate unit 42, and the driving unit 43 are connected to be communicatively connected to control the jig unit 41 and the driving unit 43 and control the temperature of the hot plate unit 42 It may include a control unit 44.

The fusing step (S4) may be performed until the discharge step (S3) of the subsequent cycle.

As described above, it was said that the robot arm 2 can be controlled by a control signal from a control means (not shown), but the control means (not shown) includes various control configurations or computing devices (for example, computers, Various electronic devices or electronic modules such as a processor) may be applied. For example, the control means (not shown) may be configured to transmit a signal or command generated according to a program or algorithm included therein to the robot arm 2. For example, the control means (not shown) is an intrinsic configuration included (installed) in the robot arm 2, or provided separately from the robot arm 2 at a position adjacent to the robot arm 2 ) And may be an independent configuration connected by wire or wirelessly.

That is, the control means (not shown) is after the molding step (S1) is performed, the robot arm (2) is combined with the molded product (MP) in the withdrawal step (S2) to withdraw the molded product (MP) from the injection machine (1). A control signal can be transmitted to the robot arm 2 to be mounted. In addition, the control means (not shown) is guided by drawing the intermediate material (IP) manufactured by being fed into the fusing machine 4 in the previous cycle in the discharging step (S3) after the withdrawing step (S2) and fused from the fusing machine (4). A control signal can be transmitted to the robot arm 2 to be discharged to the member 3. In addition, the control means (not shown) combines with the molded product MP on which the robot arm 2 is mounted in the fusion step (S4) after the discharge step (S3), enters the fusion machine 4 and releases the combination. Control signal can be transmitted to (2).

As described above, the present method is from the process of taking out and mounting the molded product (MP) from the injection machine 1 (the process performed by the molding step (S1) and the withdrawing step (S2)), the intermediate material (IP) manufactured in the previous cycle. ) From the fusing machine 4 (the process performed by the discharging step (S3)), the process of inserting the remounted molded product (MP) into the fusing machine 4 (the process carried out by the fusing step (S4)) ), since it is automated by the robot arm 2, the above-described processes can be performed more efficiently and labor costs can be reduced.

1 and 5, as described above, it was said that the robot arm 2 includes a detachable and detachable part 21 that is detachably connected to a molded product (MP) and an intermediate material (IP) at the distal end. (21) The detachable coupling part 21 has a first detachable part 211 provided with a first width on one side and a second detachable part 211 provided with a second width smaller than the first width on the other side It may include a coupling part 212.

Exemplarily, the first detachable and detachable part 211 is attached to the molded product (MP) and the intermediate material (IP) in a state in which air is sucked, and the molded product (MP) and the intermediate material (IP) are bonded to the molded product (MP) and the intermediate material (IP) in a state where the intake of air is released. It may include at least one of the inhaler and tongs (gripper, gripper) to be released, and the second detachable and detachable part 212 may also include at least one of the inhaler and tongs.

Here, the state of inhaling air from the inhaler or the state in which the inhalation of air is released may be set by the control means (not shown) described above, and the tongs are commonly used in the field, and the driving of the tongs is also specified. It can be controlled by one control means (not shown).

The detachable coupling part 21 is rotated by a rotation shaft, and each of the first width and the second width may mean a direction orthogonal to the rotation shaft. The rotation axis of the detachable coupling part 21 may coincide with the rotation axis of the wrist part (not shown).

The first detachable and detachable part 211 provided on one side from the distal end of the robot arm 2 may be exemplarily provided to protrude from one side of the distal end of the robot arm 2 toward one side (example 5), the second detachable and detachable part 212 provided on the other side from the distal end of the robot arm 2 protrudes from the distal end of the robot arm 2 toward the other side It can be (exemplarily the lower side based on FIG. 5).

As described above, in the present method, by including the first detachable and detachable part 211 having a first width and the second detachable and detachable part 212 having a second width smaller than the first width, There is an advantage that a molded article (MP) and an intermediate material (IP) having various sizes can be detachably combined and transported.

In particular, it combines and transports a plurality of molded articles (MP) and intermediate materials (IP) (see two exemplary, Figs. 2 and 3), while stably transporting one molded article (MP) and intermediate material (IP) ( 5 and 6).

8 is a view for explaining that the intermediate member on the guide member is pushed to the rear end side of the guide member through the robot arm, and FIG. 9 is a view for explaining a discharge member provided at the rear end side of the guide member.

1 to 9, the guide member 3 may be in a downwardly inclined state, the front end is disposed on the robot arm 2 side, and the rear end may be disposed on the discharge member 5 side.

Here, the front and rear ends are based on the moving direction of the intermediate material (IP) loaded on the guide member 3, and are separated from the base (not shown) from the base (not shown) in the robot arm (2). And can be placed on one side. The discharge member 5 may be an exemplary worktable, and may be disposed below the rear end of the guide member 3.

As such, this method has the advantage that the intermediate material IP can be moved from the robot arm 2 to a destination (e.g., the discharge member 5) relatively far from the robot arm 2 through the guide member 3 inclined downward. .

1 to 9, the discharging step (S3) may include a coupling step (S31) of combining the robot arm (2) with the intermediate material (IP) previously inserted into the fusing machine (4). As described above, the intermediate material (IP) previously introduced into the fusing machine 4 is manufactured in the fusing step (S4) of the previous cycle, and can be detachably coupled to the detachable part 21 of the robot arm 2. .

In addition, the discharging step (S3) may include a pushing step (S32) of moving the robot arm 2 to move the intermediate material loaded on the guide member 3 to the rear end. Here, the intermediate material (IP) loaded on the guide member 3 may be placed on the guide member 3 by the dismantling step (S33) described later in the previous cycle. In the push step (S32), the robot arm 2 moves the distal end (the other end) of the robot arm 2 from the front end to the rear end of the guide member 3 by a control signal from the control means (not shown), thereby guiding The intermediate member (IP) already loaded on the member 3 can be moved to the rear end of the guide member 3. For example, the intermediate member (IP) coupled to the detachable and detachable portion 21 of the robot arm 2 may push the intermediate member (IP) already loaded on the guide member 3 to the rear end of the guide member 3 (See Fig. 8).

In addition, the discharging step (S3) may include a disassembly step (S33) of releasing the coupling of the intermediate material (IP) coupled to the robot arm (2) and the robot arm (2). The intermediate member (IP) coupled to the robot arm (2) is disengaged from the robot arm (2) at the front end side of the intermediate member (IP) pushed by the robot arm (2) in the push step (S32), and the guide member (3) ) Can be loaded on.

As described above, in the present method, the discharging step (S3) includes a push step (S32) and a disassembly step (S33), so that friction occurs between the guide member 3 and the intermediate material (IP) loaded on the guide member 3 Even so, there is an advantage that the intermediate member (IP) on the guide member (3) can be moved to the rear end of the guide member (3).

10 is a diagram showing a further embodiment of the present invention.

1 to 10, as described above, the fusing machine 4 may include a control unit 44 for controlling the jig unit 41, the hot plate unit 42, the driving unit 43, and the like. ) Is communicatively connected with the jig part 41, the hot plate part 42, and the driving part 43 to control the jig part 41, the hot plate part 42, and the driving part 43, so that the electronic circuit and data storage It may include devices, communication equipment, electronic devices, computing devices, and the like. The fusing machine 4 may include a chamber CH for accommodating the jig portion 41, the hot plate portion 42, and the driving portion 43 therein.

The fusing machine 4 including such a control unit 44 may malfunction and fail to function when communication equipment, electronic circuits, data storage devices, electronic devices, computing devices, etc. are exposed to shock or moisture. When dust or the like flows in, the speed of operation and processing decreases, and thus a housing H for accommodating communication equipment, electronic circuits, data storage devices, electronic devices, and computing devices may be included.

If the CPU, graphics card, RAM, etc. are connected to the computer's main board and accommodated in the case, the CPU, graphics card, and RAM may fall off the cable and be damaged. In the case of installing communication equipment, electronic circuits, data storage devices, electronic devices, computing devices, etc. of the control unit 44 in the housing H, just like installing a graphic card, RAM, etc., communication equipment from the outside of the housing H , Electronic circuits, data storage devices, electronic devices, computing devices, etc., after electrically and structurally connecting them to the inside of the housing (H), communication equipment, electronic circuits, data storage devices, electronic devices, After one of the computing devices is installed in the housing H, the others are electrically and structurally connected, and wiring arrangements can be performed.

Therefore, the housing (H) needs to be opened at one side to facilitate installation of communication equipment, electronic circuits, data storage devices, electronic devices, computing devices, etc. of the control unit 44, and as described above, dust, etc. Airtightness is required to suppress performance degradation of computing devices and the like.

As a means for solving the above problem, the splicer 4 includes a housing H including a control unit 44, and the housing H has an opening H11 and an inner space H12 on one side. Characterized in that it comprises a body (H1), a cover (H2) coupled to the body (H1) to cover the opening (H11), and a sealing means (C) for coupling and sealing the body (H1) and the cover (H2) To do. As described above, in the inner space H12 of the housing H, communication equipment, electronic circuits, data storage devices, electronic devices, computing devices, etc. of the control unit 44 may be accommodated.

The sealing coupling means (C) includes a binding groove (C1) formed along the circumference of the main body (H1), an extension groove (C2) formed on the wall surface of the binding groove (C1), and a cover (H2) on the wall of the extension groove (C2). The access hole (C3) formed to the side, the binding protrusion (C4) provided along the circumference of the cover (H2) and inserted into the binding groove (C1), provided along the circumference of the cover (H2) and corresponding to the entrance hole (C3) A locking pin that is accommodated in the locking groove (C5) formed at the position, the sealing member (C6) provided on the outer surface of the binding protrusion (C4), and the entrance hole (C3) to move forward and backward, and the front end is inserted into the locking groove (C5) when moving forward Including (C7),

The sealing member C6 includes a heating part C61 that generates heat by an impact of a threshold value or more, and an expansion part C62 that is provided outside the heating part C61 and expands by heat generation.

As described above, since the housing H has the opening H11, accessibility to the internal space H12 is improved, so that operations on the internal configuration, such as assembly, wiring, replacement, soldering, etc., are easy. In addition, in order to have the above-described opening (H11) by the sealing coupling means (C), the deterioration of the airtightness due to taking the powder coupling form can be prevented without additional equipment, additional tools, and skilled skills, and furthermore, the main body ( It is possible to improve the bonding force and the bonding holding force between H1) and the cover (H2).

(In the following description, for convenience of explanation, the top, bottom, left, and right are set and described with reference to FIG. 10. This particular direction should not be construed as a factor limiting the scope of the present invention. .)

Referring to FIG. 10, and more specifically described, first, the binding groove (C1) is a groove formed along the circumference of the body (H1) on the end side of the body (H1), the overall shape of the binding groove (C1) It follows the shape of (H1). This binding groove (C1) is formed by being recessed downward along the circumference of the main body (H1) from the top.

And the extension groove (C2) is a groove formed on the wall surface (side wall surface based on the drawing) of the binding groove (C1), also the overall shape of the extension groove (C2) follows the shape of the main body (H1). The binding groove (C1) and the extension groove (C2) described above take a continuous groove structure along the circumference of the main body (H1).

And the entrance hole (C3) is formed toward the cover (H2) from the wall surface of the extension groove (C2). For example, the entrance hole C3 may be a through hole passing through the upper wall surface adjacent to the cover H2 in the extension groove C2 and an upper end of the body H1.

And the binding protrusion (C4) is provided to protrude from the lower side along the circumference of the cover (H2) is inserted into the binding groove (C1) when the main body (H1) and the cover (H2) is coupled.

And the locking groove (C5) is a groove recessed upward from the lower end of the cover (H2), likewise formed at a position corresponding to the entrance hole (C3) along the circumference of the cover (H2).

And the sealing member (C6) is provided on the outer surface of the binding protrusion (C4). The sealing member C6 includes a heating part C61 that generates heat by an impact of a threshold value or more, and an expansion part C62 that is provided outside the heating part C61 and expands by heat generation. In more detail, the heating unit C61 includes 50 parts by weight of water relative to 80 parts by weight of sodium acetate, and is accommodated in the heat conductor C63. The heating unit C61 may be provided by dissolving sodium acetate in water in a supersaturated state.

This heating part (C61) is pressed by the lower end wall of the cover (H2) and the binding groove (C1) during the coupling process between the cover (H2) and the main body (H1) and generates heat by receiving an impact above a threshold value, and the heating temperature is It is about 50 ~ 90 ℃.

The expansion part (C62) is characterized in that it further comprises 1 part by weight of polyol di(meth)acrylate and 13 parts by weight of hydrofluoroether based on 100 parts by weight of cellulose ester.

In the above, the cellulose ester is used as a thermoplastic polymer constituting the polymerizable monomer, and the glass transition temperature is 30 to 120°C, and the glass transition temperature is lowered to 55°C by the crosslinking agent described later. Other compositions of the expanded portion (C62) are based on 100 parts by weight of this cellulose ester.

Polyol di(meth)acrylate is added as a crosslinking agent and has a high molecular weight between crosslinking points to increase the viscosity of the expanded portion (C62) without deteriorating the foaming properties of the hydrofluoroether without excessively increasing the crosslinking density of the polymer resin. In addition, there is an effect of lowering the glass transition temperature of the expansion portion C62 to enable foaming at a low temperature. If the polyol di(meth)acrylate is too small, the thickening effect is insignificant and can be easily torn during foaming, and if excessive, the crosslinking density becomes too high and the foaming ratio decreases. As a result of repeated experiments, the content showing optimal foaming properties was 4 parts by weight.

Hydrofluoroether is added as a blowing agent, and its content is preferably 13 parts by weight. When the expansion part C62 is heated by the heating part C61, the thermoplastic polymer is softened and the internal pressure of the foaming agent increases, thereby expanding the volume.

And the locking pin (C7) is accommodated in the entrance hole (C3) to move forward and backward (up and down based on the drawing), and the front end is inserted into the locking groove (C5) when moving forward. A description of specific matters in which the locking pin C7 is accommodated in the entrance hole C3 is omitted, and it is assumed that common knowledge is followed.

The above-described sealing coupling means (C) provides two effects, one is to completely seal the gap occurring in the coupling portion between the main body (H1) and the cover (H2), and the other is the main body (H1). ) And the cover (H2) to improve the bonding force, the bond holding power and to suppress the shaking of the cover (H2).

Referring to Figure 10 to summarize the operation and effect of the sealing coupling means (C), in the state of Figure 10 [A], the heating part (C61) is the impact applied when the body (H1) and the cover (H2) are coupled By heating, the expansion part C62 is expanded, and the gap between the main body H1 and the cover H2 is filled and completely sealed as shown in FIG. 10 [B]. And in this process, the expansion part (C62) expands and fills the extension groove (C2), so that the locking pin (C7) is advanced so that the locking pin (C7) is inserted into the locking groove (C5), and the main body (H1) It realizes a coupling and locking structure between the and the cover H2.

The present invention described above with reference to the accompanying drawings can be variously modified and changed by a person skilled in the art, and such modifications and changes should be construed as being included in the scope of the present invention.

Injection molding machine: 1 Robot arm: 2
Detachable part: 21 First detachable part: 211
2nd detachable part: 212 Guide member: 3
Splicer: 4 Molded product: MP
Intermediate: IP

Claims (4)

A molding step of manufacturing a molded article by an injection machine;
A drawing step of taking out the molded product from the injection machine using a robot arm and placing it on a cradle;
A discharging step of pulling out the fused intermediate material by using the robot arm and moving it to a guide member; And
A fusing step of inserting and fusing the molded article into the fusing machine using the robot arm;
Including,
The fusion splicer comprises: a chamber including a jig portion for fixing the molded article, a hot plate portion for heating a welding portion of the molded article, and a driving portion for moving the jig portion and the hot plate portion; And
And a housing provided on one side of the chamber and including a control unit for controlling the jig unit, the hot plate unit, and the driving unit,
The housing includes a main body having an opening and an inner space on one side thereof, a cover coupled to the main body to cover the opening, and a hermetic coupling means for coupling and sealing the main body and the cover,
The sealing coupling means, a binding groove formed along the circumference of the main body, an extension groove formed on a wall surface of the binding groove, an entrance hole formed from a wall surface of the extension groove toward the cover, and provided along the circumference of the cover, and the binding groove A binding protrusion inserted in the cover, a locking groove provided along the periphery of the cover and formed at a position corresponding to the access hole, a sealing member provided on the outer surface of the binding protrusion, and a sealing member provided on the outer surface of the binding protrusion; Including a locking pin inserted into the locking groove,
The sealing member includes a heating unit that generates heat by an impact of a threshold value or more, and an expansion unit that is provided outside the heating unit and expands by heat generation,
The heating unit includes 50 parts by weight of water relative to 80 parts by weight of sodium acetate,
The expanded portion, relative to 100 parts by weight of cellulose ester, 1 part by weight of polyol di (meth) acrylate and 13 parts by weight of hydrofluoro ether, characterized in that it further comprises.
The method according to claim 1,
The robot arm comprises a detachable coupling portion detachably coupled to the molded article and the intermediate member at the end,
The detachable part has a first width on one side and a pair of first detachable parts spaced apart from each other and a pair of second parts that are spaced apart from each other with a second width smaller than the first width at the other side Injection product manufacturing method, characterized in that provided.
The method according to claim 1,
The guide member is inclined downward, the front end is disposed on the robot arm side, and the rear end disposed below the front end is disposed on the discharge member side,
The discharging step includes a combining step of combining the robot arm with an intermediate material previously introduced into the fusion machine, a pushing step of moving the robot arm to move the intermediate material loaded on the guide member to the rear end, and an intermediate material coupled to the robot arm And a disassembly step of releasing the coupling of the robot arm. delete

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