KR102751041B1 - Resin injection apparatus - Google Patents

Abstract

The present invention may include a subject supply unit that receives a subject and guides it so that it can be transported to the outside; a hardener supply unit that receives a hardener and guides it so that it can be transported to the outside; a mixing unit in which the subject and the hardener are transported and mixed from the subject supply unit and the hardener supply unit, respectively; a discharge unit that guides a resin obtained by stirring the subject and the hardener mixed in the mixing unit so that it can be transported to the outside; and a processing unit that discharges the resin transported from the discharge unit to the outside.

Description

RESIN INJECTION APPARATUS

The present invention relates to a resin ejector for producing a mockup of a desired shape by ejecting a resin mixed with a subject and a hardener.

More specifically, the present invention relates to a resin ejector that can shorten the working time by minimizing the hardening time due to a high resin concentration in the process of mixing a subject and a hardener and ejecting the stirred resin to produce a mock-up, and that enables the detachment of a screw for stirring and ejecting the resin to facilitate cleaning of the ejection part.

Looking at the size of the existing mold industry, more than 90% of them are operated by companies with less than 3 to 7 employees, and due to the decline in competitiveness in the heavy industry sector, orders for short-term and low-cost molds are received from customers, while high productivity/high precision level quality assurance is demanded.

Many companies need to supplement and expand their existing facilities to resolve these various types of problems and to reduce the lead time for molds, improve quality, and reduce costs.

To solve these problems, existing companies are seeking various solutions such as securing demand through overseas exports, securing unit prices through cost reduction, and securing productivity through automation. Among these, research and development is actively being conducted to produce mockups by combining CNC technology and 3D printing technology.

Here, 3D printing technology can produce a mock-up of a desired shape using resin that has the advantage of a fast hardening time by mixing and discharging a subject matter and a hardener as a sample of resin, and shaping the mock-up using CNC using the discharged resin.

However, the resin ejector that combines conventional CNC technology and 3D printing technology has the problem that it takes a long time to harden due to the low resin concentration, and in particular, if resin residue remains on the screw for ejecting the resin, there is the problem that it hardens as it is and is difficult to reuse.

Accordingly, in the past, disposable screws were used to discharge resin, but this led to an increase in production cost, which increased the cost of discharging resin, and there was a problem of falling behind in price competitiveness.

The present invention has been made to solve the above problems, and the problem to be solved by the present invention is to provide a resin ejector that can shorten the working time by minimizing the hardening time due to the high resin concentration in the process of mixing a subject and a hardener and ejecting the stirred resin to produce a mock-up.

In addition, another problem to be solved by the present invention is to provide a resin ejector that enables the detachment of a screw for stirring and ejecting resin, thereby facilitating the removal and cleaning of resin residues from the screw even when using high-concentration resin.

In addition, another problem to be solved by the present invention is to provide a resin ejector which enables the mixing of the subject matter and the hardener, the stirring of the resin, and the transport of the resin to be sequentially performed by having an inlet section, a stirring section, and an extrusion section having different shapes of screws through which mixing and stirring of the subject matter and the hardener are performed, thereby stably discharging the uncured resin to enable the production of a mock-up.

In addition, another problem to be solved by the present invention is to provide a resin ejector that can selectively control the time for the resin to harden according to the shape or size of the mock-up to be manufactured by controlling the temperature through heating or cooling during the process of ejecting the stirred resin as well as the supply of the subject matter and the hardener.

A resin ejector according to one embodiment of the present invention may include a subject matter supply unit (100) that receives a subject matter and guides it so that it can be transferred to the outside; a hardener supply unit (200) that receives a hardener and guides it so that it can be transferred to the outside; a mixing unit (300) in which the subject matter and the hardener are transferred and mixed from the subject matter supply unit (100) and the hardener supply unit (200), respectively; a discharge unit (400) that guides a resin obtained by mixing the subject matter and the hardener mixed in the mixing unit (300) so that it can be transferred to the outside; and a processing unit (500) that discharges the resin transferred from the discharge unit (400) to the outside.

In addition, each of the subject supply unit (100) and the hardener supply unit (200) may be provided with an inlet (110) into which the subject and the hardener are respectively supplied; a drum (120) coupled to the upper side of the inlet (110) and containing the subject or the hardener; a pair of extrusion screws (130) provided in the inner space and arranged adjacent to each other so that the screw threads are formed in opposite directions and rotate in opposite directions; an outlet (140) provided on the outer surface to discharge the subject or the hardener by the rotation of the extrusion screw (130); and a conveying pipe (150) connecting the outlet (140) and the mixing unit (300).

In addition, it further includes a heating unit (600) for controlling the temperature within the drum (120), and the heating unit (600) may have at least one of a first heat exchanger attached to the outer surface of the drum (120), a second heat exchanger arranged inside the drum (120), and a third heat exchanger attached to the inner surface of the drum (120).

In addition, the mixing unit (300) is provided with a motor (310) that is installed on the other side and has a female connection member (311); the discharge unit (400) is provided with a discharge pipe (410) that is coupled to one side of the mixing unit (300); and a rotating shaft (420) that is installed in the inner space of the discharge pipe (410) and has a male connection member (421) that is coupled to the female connection member (311) to share rotational force; and the male connection member (421) can be detachably attached to the female connection member (311).

In addition, the discharge unit (400) may be provided with an inlet unit (430) that is fitted to the rotating shaft (420) and allows the subject matter and the hardener transferred to the mixing unit (300) to be mixed; a stirring unit (440) that is fitted to the rotating shaft (420) and arranged on one side of the inlet unit (430) and allows the mixed subject matter and the hardener to be stirred into the resin; an extrusion unit (450) that is fitted to the rotating shaft (420) and arranged on one side of the extrusion unit (450) and allows the stirred resin to be transferred; and a hopper (460) that is coupled to the end of the discharge pipe (410) and allows the resin to be discharged to the outside by the rotation of the extrusion unit (450).

In addition, the rotation shaft (420) is formed long in the longitudinal direction of the longitudinal axis and has a cut groove (422) that is dug inward; and each of the introduction portion (430), the stirring portion (440), and the extrusion portion (450) has a fitting projection (470) that is formed long in the longitudinal direction of the longitudinal axis on the penetrated inner surface and has a shape that protrudes outward; and the fitting projection (470) is fitted into the cut groove (422) so that when the rotation shaft (420) rotates, the introduction portion (430), the stirring portion (440), and the extrusion portion (450) can rotate together.

In addition, the introduction part (430) is formed in a shape that protrudes diagonally on the outer surface, and has a plurality of diagonal wings (431) that are provided so as to be spaced apart from each other along the outer surface of the introduction part (430); the stirring part (440) is formed in a shape that protrudes diagonally on the outer surface, and has a plurality of diagonal protrusions (441) that are provided so as to be spaced apart from each other along the outer surface of the stirring part (440); and has a cutting-shaped separation groove (441a) formed between each stirring part (440); the extrusion part (450) is formed in a shape that protrudes on the outer surface, and has a spiral wing (451) that is formed in a spiral shape to transport the stirred resin to one side; the introduction part (430), the stirring part (440), and the extrusion part (450) can be sequentially coupled to the rotation shaft (420).

In addition, the processing unit (500) may be provided with a head (510) for producing a mock-up by discharging the resin transferred from the discharge unit (400), and the head (510) may be provided with a side opening hole (511); a resin transfer pipe (512) connecting the hopper (460) and the side opening hole (511); a through hole (513) formed at the lower end of the head (510) and communicating with the side opening hole (511); and a discharge nozzle (514) fitted into the through hole (513) to discharge the resin to the outside.

The present invention has a remarkable effect of shortening the working time by minimizing the hardening time due to the high resin concentration in the process of producing a mock-up by mixing a subject and a hardener and discharging the stirred resin.

In addition, the present invention has a remarkable effect of facilitating the removal and cleaning of resin residues from the screw even when using high-concentration resin, since the screw for stirring and discharging the resin can be attached and detached.

In addition, the present invention has a remarkable effect of stably discharging uncured resin by sequentially performing mixing of the subject matter and the curing agent, stirring of the resin, and conveying of the resin, by having an inlet section, a stirring section, and an extrusion section having different shapes of screws through which mixing and stirring of the subject matter and the curing agent are performed.

In addition, the present invention has a remarkable effect of allowing the time for the resin to harden to be selectively controlled according to the shape or size of the mock-up to be manufactured by controlling the temperature through heating or cooling during the process of discharging the stirred resin as well as the supply of the subject matter and the hardener.

Figure 1 is a schematic diagram of a resin ejector according to the present invention.
Figure 2 is a perspective view showing a main body supply unit and a hardener supply unit in a resin ejector according to the present invention.
Figure 3 is a partial perspective view showing a main body supply unit and a hardener supply unit in a resin ejector according to the present invention.
Figure 4 is a perspective view showing the joint relationship between the mixing section and the ejection section in a resin ejector according to the present invention.
Figure 5 is a perspective view showing a discharge unit in a resin discharger according to the present invention.
Figure 6 is an exploded perspective view showing the ejection part of a resin ejector according to the present invention.
Figure 7 is a perspective view showing an inlet portion of a resin ejector according to the present invention.
Figure 8 is a perspective view showing a stirring unit in a resin ejector according to the present invention.
Figure 9 is a perspective view showing an extrusion section in a resin ejector according to the present invention.
Figure 10 is a perspective view showing a processing section in a resin ejector according to the present invention.
Figure 11 is a side cross-sectional view showing a processing section in a resin ejector according to the present invention.
Figure 12 is an exploded side view showing a processing section in a resin ejector according to the present invention.

The advantages and features of the embodiments of the present invention, and the methods for achieving them, will become clear with reference to the embodiments described in detail below together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and the present embodiments are provided only to make the disclosure of the present invention complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. The same reference numerals may refer to the same components throughout the specification.

In describing embodiments of the present invention, if it is determined that a specific description of a known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description will be omitted. In addition, terms or words used in this specification and claims are terms defined in consideration of functions in embodiments of the present invention, and should not be interpreted as limited to their usual or dictionary meanings, and should be interpreted as meanings and concepts that conform to the technical idea of the present invention based on the principle that an inventor can appropriately define the concept of a term in order to explain his or her own invention in the best way.

Therefore, the embodiments described in this specification and the configurations illustrated in the drawings are only the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention. Therefore, it should be understood that there may be various equivalents and modified examples that can replace them at the time of filing this application.

Hereinafter, before describing with reference to the drawings, it is to be noted that matters that are not necessary to reveal the gist of the present invention, that is, known structures that can be obviously added by a person skilled in the art with common knowledge, are not illustrated or specifically described.

First, before explaining various embodiments of the present invention in detail with reference to the attached drawings, it is to be noted that terms such as “front”, “back”, “left”, “right”, “up”, “down”, “up”, “down”, “horizontal”, “vertical”, “front”, “back”, “one side”, “the other side”, “inner side”, and “outer side”) of components described in the following detailed description or illustrated in the drawings do not simply indicate or imply that they must have a specific direction, and that such description of directions is intended to facilitate explanation between components with reference to the attached drawings.

The resin ejector according to the present invention is capable of minimizing the hardening time due to high resin concentration in the process of mixing a subject and a hardener and ejecting the stirred resin to produce a mock-up, thereby shortening the working time, and enables the detachment of a screw for stirring and ejecting the resin, thereby facilitating cleaning of the ejection part (400).

First, in the resin ejector according to the present invention, the screw is described as having the function of transporting the stirred resin in which the transported subject matter and the hardener are mixed, and including the inlet section (430), the stirring section (440), and the extrusion section (450) of the ejection section (400) described below.

In addition, the mixing of the subject matter and the hardener means a state in which the subject matter and the hardener are mixed and transferred to the internal space of the mixing unit (300) described later, and the stirred resin may mean a state in which the mixed subject matter and the hardener are stirred while passing through the screw of the discharge unit (400).

Hereinafter, the resin ejector according to the present invention will be described in detail with reference to the attached drawings.

FIG. 1 is a schematic diagram of a resin ejector according to the present invention, FIG. 2 is a perspective view showing a main supply unit and a hardener supply unit in a resin ejector according to the present invention, FIG. 3 is a partial perspective view showing a main supply unit and a hardener supply unit in a resin ejector according to the present invention, FIG. 4 is a perspective view showing a coupling relationship between a mixing unit and a discharge unit in a resin ejector according to the present invention, FIG. 5 is a perspective view showing a discharge unit in a resin ejector according to the present invention, FIG. 6 is an exploded perspective view showing a discharge unit in a resin ejector according to the present invention, FIG. 7 is a perspective view showing an inlet unit in a resin ejector according to the present invention, FIG. 8 is a perspective view showing a stirring unit in a resin ejector according to the present invention, and FIG. 9 is a perspective view showing an extrusion unit in a resin ejector according to the present invention.

The resin ejector according to the present invention is for producing a mockup of a desired shape by ejecting a resin mixed with a subject and a hardener, and may include a subject supply unit (100), a hardener supply unit (200), a mixing unit (300), an ejection unit (400), and a processing unit (500).

The subject supply unit (100) can receive a subject and transfer the supplied subject to the outside. The subject supply unit (100) can transfer the supplied subject to the inner space of the mixing unit (300).

The hardener supply unit (200) can receive the hardener and transfer the supplied hardener to the outside. The hardener supply unit (200) can transfer the supplied hardener to the inner space of the mixing unit (300).

The subject supply unit (100) and the hardener supply unit (200) are configured to have substantially the same configuration, but are provided separately so that the subject and the hardener can be supplied to the mixing unit (300). That is, the subject and the hardener are supplied separately in an unmixed state, and then transferred to the mixing unit (300) and the discharge unit (400) to be mixed, thereby obtaining a stirred resin.

Referring to FIG. 2, each of the subject supply unit (100) and the hardener supply unit (200) may include an inlet (110), a drum (120), an extrusion screw (130), an outlet (140), and a transfer pipe (150).

The inlet (110) is formed in an open shape at the top so that the main material or hardener inside the drum (120) can be introduced into the inner space.

The drum (120) can provide a space for receiving a subject or a curing agent. At least a portion of the lower side of the drum (120) can be opened. The opened portion of the lower side of the drum (120) can be connected to the inlet (110).

The drum (120) is open at the top, and the subject matter or hardener contained in the drum (120) can be forced into the inlet (110) by pressing downward through the space opened at the top.

Referring to FIG. 2 for more detailed explanation, the subject supply unit (100) and the hardener supply unit (200) may each be provided with a support unit (121) on the outside, and a pneumatic cylinder (122) may be combined with the support unit (121).

The pneumatic cylinder (122) may be provided with a rod (122a) that can slide up and down, and may be provided with a pressing part (123) inserted into the upper open space of the drum (120) at the lower end of the rod (122a).

When the load (122a) slides downward by the operation of the pneumatic cylinder (122), the pressing part (123) provided at the bottom of the load (122a) is inserted into the upper open space of the drum (120) to press downward the subject or hardener contained in the drum (120), thereby allowing it to be introduced into the inner space through the inlet (110).

One or more selected inner spaces of the presser (123) or the drum (120) may be equipped with a limit sensor or a temperature sensor (not shown) to monitor the subject or hardener contained in the drum (120).

Depending on the design conditions, the drum (120) may be provided with a separate access means for opening and closing the lower open space of the drum (120) so that the received subject matter or hardener is dropped by the operation of the pressing part (123) and flows into the inlet (110). For example, the drum (120) may be configured to open and close the lower open space using a structure in which a pipe is opened by rotating a handle. However, the present invention is not limited thereto, and any configuration may be used as long as the subject matter or hardener received in the drum (120) can be selectively discharged from the drum (120).

In the present embodiment, FIGS. 1 and 2 illustrate a drum (120) coupled to the upper side of an inlet (110) formed in each of the main material supply unit (100) and the hardener supply unit (200). However, depending on design conditions, the drum (120) may be separately provided on the outside rather than on the upper side of the main material supply unit (100) or the hardener supply unit (200), and the main material or hardener contained in the drum (120) may be configured to be connected to a separate connecting pipe so that they can be smoothly supplied to the main material supply unit (100) and the hardener supply unit (200).

The extrusion screw (130) performs the function of extruding the subject matter or hardener introduced from the inlet (110) to one side and transporting it to the mixing unit (300) described later. It is provided with a pair of extrusion screws (130) for extruding the subject matter or hardener, and the pair of extrusion screws (130) may be arranged adjacent to each other, have screw threads formed on the outside, and be configured so that the rotation directions are opposite to each other.

Preferably, a motor (not shown) may be further provided to drive the extrusion screw (130). Accordingly, the extrusion screw (130) can be rotated by the motor to extrude the subject or curing agent.

The discharge port (140) is provided on the outer surface and can discharge the extruded subject matter or hardener to the outside by the operation of the extrusion screw (130). The discharge port (140) can be formed in a cylindrical shape.

The conveying pipe (150) can connect the discharge port (140) and the mixing unit (300) described below so that the subject matter and the hardener discharged from the discharge port (140) can flow into the inner space of the mixing unit (300).

A pair of transfer pipes (150) are connected at one end to an outlet (140) provided in each of the subject supply unit (100) and the hardener supply unit (200), and the other ends are connected to each side of the mixing unit (300), so that the subject matter discharged from the subject supply unit (100) can be transferred to the mixing unit (300) through one transfer pipe (150), and the hardener discharged from the hardener supply unit (200) can be transferred to the mixing unit (300) through the other transfer pipe (150).

The conveying pipe (150) may be made of a flexible corrugated pipe.

Depending on the design conditions, the discharge amounts of the subject matter and the hardener from each of the subject supply unit (100) and the hardener supply unit (200) can be configured to be approximately 1:1 so that a high concentration of resin is discharged.

To this end, by comparing the results of the limit sensor installed in the subject supply unit (100) and the limit sensor installed in the hardener supply unit (200), the rotational power (RPM) of the extrusion screw (130) or the operating degree of the pneumatic cylinder (122) can be controlled so that the discharge amounts of the subject and hardener are in a ratio of 1:1.

If the molecular weights of the subject matter and the curing agent contained in each of a pair of drums (120) are different from each other or the temperatures are different from each other, the rotational force (RPM) of the extrusion screw (130) can be adjusted differently to control the ratio of the discharge amounts to 1:1 because the discharge amounts are different when the extrusion screw (130) is rotated with the same rotational force (RPM).

For example, if the viscosity of the subject matter contained in the drum (120) of the subject matter supply unit (100) is measured as being higher than the viscosity of the hardener contained in the drum (120) of the hardener supply unit (200) as a result of the monitoring, the rotational power (RPM) of the extrusion screw (130) of the subject matter supply unit (100) is set to about 540, and the rotational power (RPM) of the extrusion screw (130) of the hardener supply unit (200) is set to about 490, thereby controlling the discharge amounts of the subject matter and the hardener to be the same at 0.55 kg/min.

Accordingly, the resin ejector according to the present invention can easily control the ratio of the amount of ejected main agent and hardener to be 1:1 by controlling the operation of the pneumatic cylinder (122) to control the force for pressing the main agent and hardener by monitoring the status of each of the main agent and hardener, or by controlling the rotational force (RPM) of the extrusion screw (130).

Referring to FIG. 1, the resin ejector may further include a heating unit (600) that controls the temperature within the drum (120).

The heating unit (600) can control the temperature of the subject matter and the curing agent contained in the drum (120) by applying heat to the drum (120) or inside the drum (120). The heating unit (600) can absorb heat in addition to heating.

The heating unit (600) may be equipped with a heat exchanger capable of exchanging heat on the surface of the drum (120) or inside thereof. The heat exchanger may be supplied with heat from a separate heat source, or may be a thermistor, PTC, etc. capable of generating heat on its own. The heat exchanger may be arranged on the outside of the drum (120) made of a metallic material, or may be arranged on the inner surface or inside of the drum (120). In order to control the heat generation of the heating unit (600), a temperature sensor may be further equipped to measure the heat of the drum (120) or the material inside the drum (120).

The heat exchanger may include at least one of a first heat exchanger attached to an outer surface of the drum (120), a second heat exchanger disposed inside the drum (120), and a third heat exchanger attached to an inner surface of the drum (120).

Referring to FIG. 4, the mixing unit (300) can allow the subject and the hardener to be transported and mixed from the subject supply unit (100) and the hardener supply unit (200), respectively. The mixing unit (300) can allow the subject to be introduced through the transport pipe (150) connected to the subject supply unit (100), and the hardener to be introduced through the transport pipe (150) connected to the hardener supply unit (200).

The mixing unit (300) may be equipped with a motor (310) that applies rotational force to the discharge unit (400). The female connecting member (311) equipped in the motor (310) may be placed in the inner space of the mixing unit (300).

The female connecting member (311) and the male connecting member (421) provided on the rotating shaft (420) of the discharge unit (400) are combined to share the rotating force, so that the rotating shaft (420) can be rotated by the operation of the motor (310).

The female connecting member (311) and the male connecting member (421) can be detachably attached to each other. The female connecting member (311) has a groove formed inwardly at the end, and the end of the male connecting member (421) is formed in a shape corresponding to the groove, so that rotational power can be shared by fitting the male connecting member (421) into the female connecting member (311).

For example, the groove formed at the end of the female connecting member (311) can be formed to have a rectangular cross-section as shown in FIG. 4, and the male connecting member (421) can be formed in a shape corresponding thereto.

Fig. 4 illustrates that the cross-section of the groove formed in the female connecting member (311) is a square shape, but is not limited thereto, and may be formed in various shapes having multiple angles, such as triangles or pentagons. Furthermore, when formed in various shapes having multiple angles, the male connecting member (421) is also formed in a shape corresponding thereto, so that when the end of the male connecting member (421) is fitted into the groove formed in the female connecting member (311), rotational force can be shared between the two.

The discharge unit (400) can guide the resin mixed with the subject and the hardener in the mixing unit (300) to be transferred to the outside. The discharge unit (400) extrudes and discharges the resin mixed with the subject and the hardener transferred to the mixing unit (300) using the screw rotation principle, thereby allowing the stirred resin to be transferred to the processing unit (500) described below.

The discharge unit (400) may include a discharge pipe (410), a rotating shaft (420), an inlet unit (430), a stirring unit (440), an extrusion unit (450), a hopper (460), a fitting projection (470), and a fixing means (480).

The discharge pipe (410) is coupled to one side of the mixing section (300) and can provide a space in which a screw having an inlet section (430), a stirring section (440), and an extrusion section (450) is placed. The discharge pipe (410) can transport and discharge the resin stirred by the rotation of the screw.

The discharge pipe (410) may be formed in a cylindrical shape with an empty interior and may be fixedly connected to the mixing unit (300).

The rotation shaft (420) may be installed in the inner space of the discharge pipe (410). A male connection member (421) provided on the other side of the rotation shaft (420) may be fitted into a female connection member (311) of a motor (310) located in the inner space of the mixing unit (300) to share rotational power.

Referring to FIG. 6, the rotation axis (420) is formed to be long in the longitudinal direction of the major axis, and a cut groove (422) having an inwardly dug shape can be formed.

When the inlet section (430), the stirring section (440), and the extrusion section (450) that can be attached and detached from the rotation shaft (420) are fitted to the rotation shaft (420), the insertion projections (470) formed on each of the inlet section (430), the stirring section (440), and the extrusion section (450) can be fitted to share the rotational power between the components.

That is, when the insertion projection (470) is fitted into the cutting groove (422), the introduction portion (430), the stirring portion (440), and the extrusion portion (450), which share the rotational force when the rotation shaft (420) rotates due to the operation of the motor (310), can rotate together.

Referring to FIG. 7, the inlet section (430) is formed as a cylinder with one side and the other side perforated, and is fitted to a rotating shaft (420) so that the subject matter and the hardener transferred to the mixing section (300) can be mixed.

This introduction part (430) is formed in a shape that protrudes diagonally on the outer surface, and a plurality of diagonal wings (431) may be provided so as to be spaced apart from each other along the outer surface of the introduction part (430).

The diagonal blade (431) can be transferred to the mixing unit (300) by rotating the inlet unit (430) together with the rotation axis (420) to transfer the mixed subject matter and hardener to one side. In other words, the mixed subject matter and hardener can be transferred to the stirring unit (440) described later.

The inner surface of the lead portion (430) is provided with an insertion projection (470) that protrudes outward, so that when the lead portion (430) is inserted into the rotary shaft (420), the insertion projection (470) is inserted into the cut groove (422) formed in the rotary shaft (420), so that the rotary shaft (420) and the lead portion (430) can share rotary power.

Referring to Fig. 8, the stirring unit (440) may be a cylindrical shape with one end and the other end being perforated. The stirring unit (440) may be fitted to the rotating shaft (420) and placed on one side of the introduction unit (430). The stirring unit (440) may stir the mixed subject matter and the curing agent, which are conveyed by the rotation of the introduction unit (430), into the resin.

The stirring part (440) may have a shape that protrudes diagonally on the outer surface. The stirring part (440) may be provided with a plurality of diagonal protrusions (441) spaced apart from each other along the outer surface of the stirring part (440). The stirring part (440) may be provided with a spacing groove (441a) cut between adjacent diagonal protrusions (441).

Since the diagonal protrusions (441) are formed diagonally on the outer surface of the stirring unit (440), when the stirring unit (440) rotates, the resin is extruded, and at the same time, the main agent and the hardener are stirred in the space formed by the separation groove (441a), thereby obtaining a resin in a stirred state.

The subject matter and the hardener in a mixed state are stirred and mixed into a resin while passing through a stirring unit (440), and this resin is transferred to a processing unit (500) described below and discharged to the outside, thereby enabling the production of a mock-up in a desired shape.

Furthermore, the resin stirred by the diagonal projection (441) is transferred to the extrusion section (450).

At this time, the inner surface of the stirring part (440) is provided with an insertion projection (470) that protrudes outward, so that when the stirring part (440) is inserted into the rotating shaft (420), the insertion projection (470) is inserted into a cut groove (422) formed in the rotating shaft (420), so that the rotating shaft (420) and the stirring part (440) can share rotating power.

Referring to FIG. 9, the extrusion section (450) is formed as a cylinder with one side and the other side perforated, is fitted to a rotating shaft (420) and is placed on one side of the extrusion section (450), and can transfer resin stirred in the stirring section (440) to the processing section (500) described later.

The extrusion section (450) is formed in a protruding shape on the outer surface, and may be provided with a spiral wing (451) formed in a spiral shape to transport the stirred resin toward the front side.

Since the spiral blade (451) is formed in a spiral shape on the outer surface of the extrusion section (450), the resin stirred in the stirring section (440) can be extruded and transported.

The inner surface of the extrusion part (450) is provided with an insertion projection (470) that protrudes outward, so that when the extrusion part (450) is inserted into the rotary shaft (420), the insertion projection (470) is inserted into a cut groove (422) formed in the rotary shaft (420), so that the rotary shaft (420) and the extrusion part (450) can share rotary power.

Accordingly, as the extrusion part (450) rotates along with the rotation axis (420), the stirred resin can be extruded and transported along the spiral blade (451).

Referring to FIGS. 7 and 9, the diagonal blade (431) formed in the inlet portion (430) and the spiral blade (451) formed in the extrusion portion (450) are formed in a spiral shape so that the mixed subject matter, hardener, and stirred resin are transported when the rotation axis (420) rotates, but the angles formed by the diagonal blade (431) and the spiral blade (451) with respect to the rotation axis (420) can be implemented to be different.

The diagonal blade (431) formed in the inlet portion (430) is formed in an inclined shape to have a small angle with respect to the longitudinal direction of the rotation axis (420), and the spiral blade (451) of the extrusion portion (450) can be formed in an inclined shape to have a larger angle with respect to the longitudinal direction of the rotation axis (420).

In detail, the diagonal blade (431) of the inlet portion (430) may have a shape erected based on the longitudinal axis of the rotational axis (420) as illustrated in FIG. 7, and the spiral blade (451) of the extrusion portion (450) may have a shape laid down based on the longitudinal axis of the rotational axis (420) as illustrated in FIG. 9.

Accordingly, the subject matter and the hardener transferred to the mixing section (300) are transferred to the stirring section (440) at a faster speed by the rotation of the introduction section (430) equipped with diagonal blades (431) in an erected shape while in a mixed state, that is, are quickly introduced into the stirring section (440), and the resin that has been stirred in the stirring section (440) is induced to fill the space between the spiral blades (451) by the rotation of the extrusion section (450) equipped with spiral blades (451) in a laid-down shape with the stirred resin, thereby enabling the resin to be discharged uniformly.

At this time, the rotational force (RPM) of the rotation shaft (420) by the operation of the motor (310) can be controlled to be 350, and thus, the discharge amount of the stirred resin that sequentially passes through the inlet section (430), the stirring section (440), and the extrusion section (450) can be controlled to have about 0.9 to 1.1 kg/min.

This is because by controlling the resin to have a discharge amount of 1 kg/min when the subject and hardener are mixed in a ratio of 1:1, the problem of the resin hardening too quickly or too slowly during the process of being transported to the processing section (500) described later to produce a mock-up can be prevented in advance.

According to the design conditions, the rotational power (RPM) of the rotation shaft (420) can be controlled by controlling the operating conditions of the motor (310) after checking the sample condition or temperature change of the subject and the hardener. For example, if the curing time of the stirred resin is relatively short, the rotational power (RPM) can be increased so that the resin is discharged at a faster speed, or conversely, if the curing time of the stirred resin is relatively delayed, the rotational power (RPM) can be reduced so that the resin is discharged at a slower speed.

In addition, it goes without saying that the angles of inclination of the diagonal wings (431) formed in the inlet portion (430) and the diagonal protrusions (441) formed in the stirring portion (440) can be the same. For example, the inlet portion (430) and the stirring portion (440) in which the diagonal wings (431) and the diagonal protrusions (441) having the same angles of inclination are respectively formed have the same shape and size, but a spacing groove (441a) is formed between the diagonal protrusions (441) of the stirring portion (440), so that the inlet portion (430) can transport the subject matter and the hardener in a mixed state, and the stirring portion (440) can mix the mixed subject matter and the hardener transported from the inlet portion (430).

Furthermore, it is preferable that the introduction section (430), the stirring section (440), and the extrusion section (450) are configured to be sequentially coupled to the rotating shaft (420), so that the subject matter and the hardener transferred to the mixing section (300) can be mixed and then discharged as a stirred resin.

Furthermore, since the inlet section (430), the stirring section (440), and the extrusion section (450) can be detached from the rotating shaft (420), there is an advantage in that they can be separated and easily cleaned even if resin residue gets caught.

Depending on the design conditions, when the introduction part (430), the stirring part (440), and the extrusion part (450) are sequentially fitted to the rotation shaft (420), a fixing means (480) may be provided to fix the extrusion part (450) to the rotation shaft (420).

Referring to FIG. 9, a hole having a penetrating shape is formed in each of the rotation shaft (420) and the extrusion part (450), and the fixing means (480) may be provided with a split pin that fits into the hole.

That is, by sequentially inserting the inlet section (430), the stirring section (440), and the extrusion section (450) into the rotating shaft (420), and then fixing them by inserting a split pin into the hole formed in the rotating shaft (420) and the hole formed in the extrusion section (450), the extrusion section (450) can be prevented from being separated from the rotating shaft (420).

The introduction section (430), the stirring section (440), and the extrusion section (450) can be made of aluminum material that is light in weight and has a predetermined strength.

The hopper (460) can be connected to one end of the discharge pipe (410). The hopper (460) is formed in a shape that gradually narrows toward the outside, and can be connected to the processing section (500) and the resin transfer pipe (512) described below.

When the rotating shaft (420) rotates, the stirred resin is transported along the extrusion section (450) toward the hopper (460) and can be discharged through the hopper (460).

At this time, the hopper (460) can be configured to be detachably attached to one side of the discharge pipe (410) by a screw thread connection, and thus, by blocking the open space on one side of the discharge pipe (410), it can perform a cover function to prevent the rotation shaft (420), the introduction part (430), the stirring part (440), and the extrusion part (450) provided inside the discharge pipe (410) from being detached.

The other end of the rotation shaft (420) is connected to the female connecting member (311) of the motor (310), and one end can be hung on the hopper (460) so that the rotation shaft (420) does not detach from the female connecting member (311).

The discharge unit (400) configured in this manner can perform the function of mixing the subject matter and hardener introduced from the mixing unit (300) and mixing them to discharge them as resin.

That is, the discharge unit (400) is used for stirring the resin, controls the amount of resin discharged, and facilitates cleaning by attaching and detaching the screw for stirring the resin, thereby making it stable in handling resin with a fast curing time and advantageous in maintenance.

Depending on the design conditions, the discharge unit (400) may be further equipped with a cooling unit (not shown in the drawing).

This cooling unit can prevent overheating by controlling the temperature inside the discharge unit (400) during the process of mixing and stirring the subject matter and the hardener, thereby lowering the heat generated when the rotating shaft (420), the inlet unit (430), the stirring unit (440), and the extrusion unit (450) rotate. It is preferable that the cooling unit be controlled so that the temperature inside the discharge unit (400) is maintained at about 25°C.

Referring to FIG. 1, a transport unit (700) for moving the subject supply unit (100), the hardener supply unit (200), the mixing unit (300), and the discharge unit (400) may be further provided.

This transport unit (700) can be formed by an electric forklift.

An electric forklift uses the principle of a forklift and can perform the function of lifting an object to be moved and then unloading and installing it in the moved location.

That is, the transport unit (700) consisting of an electric forklift moves the main material supply unit (100), the hardener supply unit (200), the mixing unit (300), and the discharge unit (400) to a desired location to enable stirring and discharge of the resin, thereby improving the work rate.

FIG. 10 is a perspective view showing a processing section in a resin ejector according to the present invention, FIG. 11 is a side cross-sectional view showing a processing section in a resin ejector according to the present invention, and FIG. 12 is an exploded side view showing a processing section in a resin ejector according to the present invention.

The processing unit (500) can produce a mock-up by discharging resin transferred from the discharge unit (400) to the outside. The processing unit (500) can be equipped with a head (510) connected to the discharge unit (400) and through which resin is transferred from the discharge unit (400).

The processing unit (500) for operating the head (510) may be configured for mock-up production, such as a conventional 5-axis CNC machine, but the configuration of the processing unit (500) for operating the head (510) in the present invention is not particularly limited.

That is, in the present invention, the processing unit (500) is connected to a head (510) that discharges resin and a discharge unit (400), so that the resin transferred from the discharge unit (400) is discharged to the outside through the head (510), thereby helping to easily produce a mock-up of a desired shape.

Referring to FIGS. 10 to 12, a head (510) is provided in a processing unit (500) configured as a 5-axis CNC processing machine, and is capable of moving in various directions and positions, and is connected to a discharge unit (400) and a resin conveying pipe (512) so that resin conveyed from the discharge unit (400) can be discharged to the outside.

The head (510) may be provided with a side opening hole (511), a resin conveying tube (512), a through hole (513), and a discharge nozzle (514).

Depending on the design conditions, the head (510) can be configured to be detachable from the processing unit (500) configured as a 5-axis CNC processing machine.

This is structured to enable the inlet section (430), the stirring section (440), and the extrusion section (450) to be detachably attached from the rotating shaft (420), thereby facilitating cleaning, and can obtain the same effect as the effect of minimizing the presence of resin residue in the discharge pipe (410).

That is, by enabling the head (510) to be detached from the processing unit (500) and thus easily cleaned, the resin transferred from the discharge unit (400) to the head (510) can be minimized from remaining within the inner space of the head (510).

The side opening hole (511) is formed to penetrate the inner space and the exterior on the side of the head (510), and a resin transfer pipe (512) can be connected.

As shown in FIGS. 10 and 11, the side opening hole (511) may be formed in a protruding shape on the side of the head (510) so as to be fitted into the resin transfer pipe (512), or may be configured to be fixed by a separate banding process after the protruding portion is fitted into the resin transfer pipe (512), or may be formed with screw threads formed on the outer surface of the protruding portion, and a nut that is rotatable and has screw threads formed on the inner surface of the end of the resin transfer pipe (512) so as to engage with the screw threads, so as to be fitted by a screw thread connection method.

In another embodiment, the side opening hole (511) may be formed in a form in which the side of the head (510) is penetrated rather than in a form protruding from the outer surface of the head (510), and a resin delivery pipe (512) may be fitted into the penetrated space and then fixed by banding.

The resin transfer pipe (512) has one end connected to the side opening hole (511) and the other end connected to the hopper (460) of the discharge unit (400), so that the resin discharged from the discharge unit (400) can be transferred to the inner space of the head (510) through the side opening hole (511) of the head (510). The resin transfer pipe (512) can be formed of a flexible corrugated pipe.

The opening (513) is formed in an open shape on the lower side of the head (510) and can be formed to penetrate the inner space and the exterior of the head (510).

Accordingly, the resin transferred from the discharge unit (400) through the resin transfer pipe (512) connected to the side opening hole (511) can pass through the side opening hole (511) and the inner space of the resin, and then be discharged through the through hole (513).

Referring to FIGS. 11 and 12, the hole (513) is formed in a shape that gradually narrows toward the end of the head (510) so that a constant amount of resin can be discharged.

The discharge nozzle (514) is fitted into the hole (513) to control the discharge form of the resin. It can be selectively combined with the hole (513) for use, or it can be uncombined so that the resin is discharged only through the hole (513).

Referring to FIGS. 10 to 12, the discharge nozzle (514) may be formed in a form in which the portion connected to the hole (513) is narrow, the left/right width gradually increases toward the end, and the front/rear width gradually decreases.

Accordingly, the resin passing through the hole (513) can be discharged to the outside through the discharge nozzle (514), but the width of the resin can be widened.

In Figs. 10 to 12, examples are shown in which the width of the resin is widely discharged due to the shape of the discharge nozzle (514). However, depending on the design conditions, discharge nozzles (514) having various shapes, such as a polygonal shape such as a triangle or square or a shape having multiple holes, through which the resin is discharged, may be selectively connected to the hole (513). In other words, by selectively utilizing discharge nozzles (514) of various shapes, the shape of the discharged resin can be freely adjusted, which has the advantage of allowing for various presentations when producing a mock-up.

Depending on the design conditions, a storage unit (800) may be additionally provided for preheating the subject matter and hardener or the completed mock-up.

As shown in Fig. 1, the storage unit (800) is preferably constructed as a separate facility to store the subject and the hardener or to store the completed mock-up, and may be configured to control the temperature within the storage unit (800).

Accordingly, when producing a mock-up, the subject matter supplied to the subject matter supply unit (100) and the hardener supplied to the hardener supply unit (200) are preheated to facilitate the working environment and to ensure that the finished mock-up is stably hardened.

For example, in the process of preheating the subject and the hardener, the subject and the hardener may be preheated to a temperature of about 40°C for 30 minutes before work and then supplied to the subject supply unit (100) and the hardener supply unit (200).

Accordingly, even if the storage period of the subject and hardener is extended, changes in physical properties can be minimized to ensure smooth mixing of the resin.

According to this configuration, the resin ejector according to the present invention can shorten the working time by minimizing the hardening time due to the high resin concentration in the process of mixing the subject matter and the hardener and ejecting the stirred resin to produce a mock-up.

In addition, since the present invention enables the detachment of a screw for stirring and discharging resin, it is possible to easily remove and clean resin residues from the screw even when using high-concentration resin.

In addition, since the present invention comprises an inlet section (430), a stirring section (440), and an extrusion section (450) in which the mixing and stirring of the subject matter and the hardener are performed with screws having different shapes, the mixing of the subject matter and the hardener, the stirring of the resin, and the transport of the resin are performed sequentially, thereby stably discharging the resin in a non-hardened state.

In addition, the present invention allows temperature control through heating or cooling during the process of discharging the stirred resin as well as supplying the subject and the hardener, thereby selectively controlling the time for the resin to harden according to the shape or size of the mock-up to be manufactured.

Although the above description has presented and described various embodiments of the present invention, the present invention is not necessarily limited thereto, and it will be apparent to those skilled in the art that various substitutions, modifications, and changes can be made without departing from the technical spirit of the present invention.

100: Subject supply section 110: Input port
120 : Drum 121 : Support
122 : Pneumatic cylinder 122a : Rod
123: Pressing part 130: Extrusion screw
140 : Outlet 150 : Transfer pipe
200 : Hardener supply section
300: Mixing section 310: Motor
311: Absence of dark connection
400: Discharge part 410: Discharge pipe
420: Rotating shaft 421: Water connecting member
422: Incision groove 430: Inlet
431: diagonal wing 440: stirring part
441: diagonal projection 441a: spaced groove
450: Extrusion part 451: Spiral blade
460: Hopper 470: Insert
480 : Fixing means
500 : Machining section 510 : Head
511: Side opening hole 512: Resin conveying tube
513 : Through hole 514 : Discharge nozzle
600 : Heating part
700 : Transport section
800 : Storage

Claims (2)

A subject supply department that provides guidance on how to supply subjects and transfer them externally;
A hardener supply unit that supplies hardener and guides it so that it can be transported to the outside;
A mixing section in which the subject matter and the hardener are respectively transferred from the subject matter supply section and the hardener supply section and mixed;
A discharge unit that guides the resin mixed with the subject and the hardener in the mixing unit so that it can be transferred to the outside; and
It includes a processing section that discharges the resin transferred from the above discharge section to the outside;
The above mixing unit is installed on the other side and has a motor with a female connecting member;
The above discharge part
A discharge pipe coupled to one side of the above mixing section; and
A rotary shaft is provided, which is installed in the inner space of the above discharge pipe and has a male connecting member that is connected to the female connecting member to share the rotational force;
The above-mentioned water connecting member is detachable from the above-mentioned female connecting member,
The above discharge part
An inlet section that is inserted into the above rotating shaft and transports the subject matter and the hardener to the mixing section to be mixed;
A stirring unit fitted to the above rotating shaft and placed on one side of the inlet section, for stirring the mixed subject and hardener into the resin;
An extrusion unit fitted to the above-mentioned rotating shaft and placed on one side of the extrusion unit, which transports the stirred resin; and
A hopper is provided which is connected to the end of the above discharge pipe and allows the resin to be discharged to the outside by the rotation of the extrusion part;
The above processing unit is equipped with a head for producing a mock-up by discharging the resin transferred from the discharge unit;
The above head
side opening hole;
A resin conveying pipe connecting the above hopper and the side opening hole;
A through hole formed at the lower end of the head and communicating with the side opening hole; and
A resin ejector having a discharge nozzle fitted into the above-mentioned hole to discharge resin to the outside. In paragraph 1,
Each of the above subject supply section and hardener supply section
Inlets into which the subject and hardener are respectively injected;
A drum coupled to the upper side of the above inlet and containing a subject or hardener;
A pair of extrusion screws provided in the inner space, arranged adjacent to each other, with screw threads formed in opposite directions and rotating in opposite directions;
An outlet provided on the outer surface to discharge the subject matter or hardener by rotation of the extrusion screw; and
A resin ejector having a transfer pipe connecting the above discharge port and the mixing section.

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