JP6686539B2 - Injection molding die and injection molding method using the same - Google Patents

Description

  The present invention relates to an injection molding die and an injection molding method.

  In recent years, research has been conducted on miniaturization of chemical reaction systems such as microreactors and microanalysis systems, and analysis systems.

  One of the advantages of the miniaturization of the system is that the test can be performed with a small amount of sample, and the discharge amount of waste liquid is reduced. Another advantage is that the miniaturized system is easy to carry. Further, the miniaturization of the system allows the system to be constructed at low cost.

  Such a system can be expected to be applied to analysis of nucleic acids, proteins or sugar chains, synthesis, rapid analysis of trace chemical substances, and high-throughput screening of pharmaceuticals / drugs.

  Patent Document 1 (International Publication No. 2010/110014 pamphlet) is a molding die including a fixed die and a movable die, and forming a cavity between the fixed die and the movable die. , A plurality of rod-shaped pins that are provided on the movable mold and that make the tip end contact the fixed mold in the cavity when the mold is clamped, and a plurality of pins that are pressed toward the fixed mold at the same time when the mold is clamped , An elastic pressing member arranged outside the cavity is described.

International Publication No. 2010/110014 Pamphlet

  However, in the injection molding die according to Patent Document 1, since the pin is pressed against the fixed mold via the elastic pressing member, the pressure contact force between the pin and the fixed mold is relaxed. Therefore, burrs may be generated at the portion that obstructs the flow of the fluid such as the reagent.

  The main object of the present invention is to make it less likely to cause burrs in injection-molded articles. Another object of the present invention is to make it difficult for the flow of fluid to be affected even if burrs are formed on the injection-molded product.

(1)
An injection-molding die according to one aspect includes a first die and a second die that are in pressure contact with each other, at least one die is movable, and the first die and the second die are In an injection molding die for forming a cavity into which resin is injected, the first die and the second die before being pressed are virtually overlapped with each other in a positional relationship after being pressed. When combined, the distance between the respective pressure contact surfaces of the first and second molds that are virtually overlapped is 1 μm or more and 200 μm or less.

  In this case, the pressure contact force between the first mold and the second mold becomes large. As a result, there is an effect that burrs are unlikely to occur at the contact portion between the first mold and the second mold.

  If the distance between the pressure contact surfaces of the first and second molds that are virtually overlapped is less than 1 μm, burrs may occur at the contact portion between the first mold and the second mold. Is high. Further, when the distance between the respective pressure contact surfaces of the first mold and the second mold which are virtually overlapped is larger than 200 μm, the molds (first mold, second mold) are likely to deteriorate. .

(2)
An injection molding die according to another invention includes a first die and a second die that are pressed against each other, at least one die being movable, and the first die and the second die. An injection-molding die for forming a cavity into which a resin is injected, wherein at least one first pin having a pressure-contact surface for pressure-contacting the second die at its tip is provided on the first die. When the first pin and the second mold before being pressed against each other are virtually overlapped in the positional relationship after being pressed against each other, the first pin and the second mold that are virtually overlapped with each other are The distance between the pressure contact surfaces is 1 μm or more and 200 μm or less.

  In this case, the pressure contact force between the first pin and the second mold becomes large. As a result, burrs are less likely to occur at the contact portion between the first pin and the second mold.

(3)
Injection mold according to the third invention is the injection mold according to another aspect of the present invention, in contact with the second pin, pressure for increasing the contact pressure between the second pin and the first mold It includes a force magnifying member.

In this case, the pressure contact force between the second pin and the first die becomes large. As a result, burrs are less likely to occur at the contact portion between the second pin and the first mold.

(4)
An injection molding die according to yet another aspect includes a first die and a second die that are pressed against each other, at least one die being movable, and the first die and the second die. An injection molding die for forming a cavity into which a resin is injected, wherein the first die is provided with at least one first pin having a pressure contact surface at its tip, and the second die is A second pin having a pressure contact surface, which is in pressure contact with the first pin , at the tip is provided.

In this case, the pressure contact force between the first pin and the second pin increases. As a result, burrs are less likely to occur at the contact portion between the first pin and the second pin . Further, since the longitudinal dimension of the first pin and the second pin is changed, it is possible to adjust the contact position of the first pin and the second pin.

Thus, on the hard burr occurs at the contact portion between the first pin and the second pin, even if burrs at the contact portion between the first pin and the second pin when very rare occurs, reagent It is difficult to affect the flow of fluid such as.

(5)
An injection-molding die according to a fifth aspect of the present invention is an injection-molding die according to yet another aspect, wherein the first pin and the second pin before being pressed are in a positional relationship after being pressed. When they are virtually overlapped, the distance between the respective pressure contact surfaces of the virtually overlapped first pin and second pin is 1 μm or more and 200 μm or less.

In this case, the pressure contact force between the first pin and the second pin increases. As a result, burrs are less likely to occur at the contact portion between the first pin and the second pin .

(6)
An injection molding die according to a sixth aspect of the present invention is an injection molding die according to yet another aspect or the fifth aspect of the present invention, wherein the first die is provided with a first through hole through which the first pin penetrates. The second die is provided with a second through hole that allows the second pin to pass therethrough.

In this case, the pressure contact force between the first pin and the second pin increases. As a result, burrs are less likely to occur at the contact portion between the first pin and the second pin .

(7)
An injection molding die according to a seventh aspect of the present invention is the injection molding die according to the sixth aspect of the present invention, in which the first die has a protruding portion press-contacted to the peripheral edge of the first through hole with the second pin. Alternatively, the second mold has a protrusion that is pressed against the first pin at the peripheral edge of the second through hole.

  In this case, the protrusion is provided on the peripheral portion of the through hole. As a result, even in a rare case where burr is generated in the portion where the flow path and the through hole are connected, the position where the burr is formed is the upper end portion of the protrusion. Therefore, even if burrs occur, it has an effect that the flow of the fluid such as the reagent hardly affects.

(8)
An injection molding die according to an eighth aspect of the present invention is the injection molding die according to the seventh aspect of the present invention, which is in contact with the second pin, and the second pin and the first pin or the first die. It includes a pressure contact force expanding member for increasing the pressure contact force with.

In this case, even if the pin has a normal size, the pressure contact force of the pin can be increased by the injection molding die including the pressure contact force expanding member. As a result, there is an effect that burrs are unlikely to occur at the contact portion between the second pin and the first pin or the first die .

(9)
An injection molding die according to a ninth aspect is the injection molding die according to the first aspect to the eighth aspect, wherein the first die or the second die includes a convex portion for a micro flow channel groove. , Things.

  In this case, the micro channel groove formed by the micro channel groove convex portion has an extremely small depth. Therefore, if burr is generated in the flow path of the injection-molded product, the burr hinders the flow of fluid such as a reagent. However, the present invention is suitable for manufacturing a microchannel device because burrs are unlikely to occur.

(10)
An injection molding die according to a tenth aspect of the present invention includes a first die and a second die that are pressed against each other, at least one of the dies being movable, and the first die and the second die. Is a mold for injection molding that forms a cavity into which a resin is injected between the first mold and at least one third through hole and the third through hole. A first pin having a tip is provided, a second die is provided with a second pin having a pressure contact surface which is brought into pressure contact with the first pin at a tip, and the first die is connected to the third through hole. A flow path convex portion for forming a flow path in the product , the third through hole and the flow path convex portion are connected , the inner surface of the third through hole and the side surface of the first pin are in pressure contact with each other, It is a thing.

  In this case, in the injection-molded product, burrs are less likely to occur in the portion where the flow path formed by the flow path convex portion and the third through hole are connected. As a result, the burr is unlikely to obstruct the flow of the fluid such as the reagent.

(11)
An injection molding die according to an eleventh aspect of the present invention is the injection molding die according to the tenth aspect of the present invention, in which the side surface of the first pin before pressure contact, the third through hole, and the flow path protrusion are When the inner surface of the third through hole connected to each other is virtually overlapped with each other in the positional relationship after the pressure contact, the virtually overlapped first pin , the third through hole, and the flow path convex portion are The distance between the side surface of the first pin and the inner surface of the third through hole with respect to the connected third through hole is 1 μm or more and 200 μm or less.

  In this case, in the injection-molded product, burrs are less likely to occur in the portion where the flow path formed by the flow path convex portion and the third through hole are connected. As a result, the burr is less likely to obstruct the flow of fluid such as a reagent.

(12)
An injection molding die according to a twelfth invention is the injection molding die according to the tenth invention or the eleventh invention, wherein the first mold has a second pin on a peripheral portion of the third through hole. It has a protrusion to be pressed against.

  In this case, the protrusion is provided on the peripheral portion of the through hole. As a result, even if a burr is generated in the portion where the flow path and the through hole are connected, the position where the burr is generated is the upper end portion of the protrusion. Therefore, even if burrs are generated in an extremely rare case, there is an effect that the flow of the fluid such as the reagent is hardly affected.

(13)
A method for manufacturing an injection-molded article according to a thirteenth invention comprises a first mold and a second mold which are pressed against each other, at least one mold is movable, and the first mold and the second mold are movable. A method of manufacturing an injection-molded article using an injection-molding die for forming a cavity into which a resin is injected, the method comprising: a pressure-contacting step of pressing a first die and a second die together; An injection step of injecting a resin into the inside, and when the first mold and the second mold before being pressure-contacted are virtually overlapped in the positional relationship after being pressure-contacted, they virtually overlap. In the manufacturing method, the distance between the respective pressure contact surfaces of the first mold and the second mold that are combined is 1 μm or more and 200 μm or less.

  In this case, the pressure contact force between the first mold and the second mold becomes large as in the case of the one aspect. As a result, there is an effect that burrs are unlikely to occur at the contact portion between the first mold and the second mold.

(14)
An injection-molded article manufacturing method according to a fourteenth aspect of the present invention is the injection-molded article manufacturing method according to the thirteenth aspect of the present invention, wherein the first die has a pressure contact surface that is in pressure contact with the second die, It is a manufacturing method including a pressure contact process in which at least one or more first pins are included, and the second mold and the first pins are in pressure contact.

  In this case, similarly to the second aspect, the pressure contact force between the first pin and the second mold becomes large. As a result, burrs are less likely to occur at the contact portion between the first pin and the second mold.

(15)
A method for manufacturing an injection-molded article according to the fifteenth invention comprises a first mold and a second mold, at least one mold is movable, and the space between the first mold and the second mold is A method of manufacturing an injection-molded product using an injection-molding die for forming a cavity into which resin is injected, wherein the first die is provided with at least one first pin having a pressure contact surface at its tip. , injected into the second mold, the second pin is provided that having a contact face which is a first pin and pressed against the tip, and pressing step of pressing the first pin and a second pin, a resin into the cavity And an injection step of performing.

In this case, the pressure contact force between the first pin and the second pin increases. As a result, burrs are less likely to occur at the contact portion between the first pin and the second pin .

A microfluidic device which is an injection-molded article molded by the injection-molding die of the present embodiment. FIG. 6 is a side cross-sectional view taken along line XX of the microchannel device of the injection-molded product. The side view sectional drawing of the metal mold | die for injection molding corresponding to the side view sectional view of XX of the same microchannel device. The elements on larger scale of the same side view sectional drawing. The flowchart which manufactures an injection molded article using the injection mold of this embodiment. The side view sectional drawing of the metallic mold for injection molding corresponding to the side view sectional view of XX of the micro channel device of the same injection-molded article. The elements on larger scale of the same side view sectional drawing. The flowchart which manufactures an injection molded article using the injection mold of this embodiment. The side view sectional drawing of the metallic mold for injection molding corresponding to the side view sectional view of XX of the micro channel device of the same injection-molded article. The side view sectional drawing of the metallic mold for injection molding corresponding to the side view sectional view of XX of the micro channel device of the same injection-molded article. The flowchart which manufactures an injection molded article using the injection mold of this embodiment. The side view sectional drawing of the metallic mold for injection molding corresponding to the side view sectional view of XX of the micro channel device of the same injection-molded article. The side view sectional drawing of the metallic mold for injection molding corresponding to the side view sectional view of XX of the micro channel device of the same injection-molded article. The flowchart which manufactures an injection molded article using the injection mold of this embodiment. The side view sectional drawing of the metallic mold for injection molding corresponding to the side view sectional view of XX of the micro channel device of the same injection-molded article. The flowchart which manufactures an injection molded article using the injection mold of this embodiment. The elements on larger scale of the same side view sectional drawing. The flowchart which manufactures an injection molded article using the injection mold of this embodiment. The side view sectional drawing of the reference injection mold corresponding to the side view sectional view of XX of the micro channel device of the same injection molded product. FIG. 3 is a partially enlarged view of a microchannel device manufactured using a reference injection molding die and a schematic diagram of the partially enlarged view.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same parts are designated by the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

(Microchannel device 100)
As shown in FIG. 1, the injection molded product molded by the injection molding die of the embodiment of the present invention is a microchannel device 100.

  The microchannel device 100 includes a main body 110, tubes 120 (120a, 120b, 120c) that allow a fluid such as a reagent to pass therethrough, and a bottom member 130.

  In this embodiment, the pipe 120 is injection-molded as one body with the main body 110, but the main body 110 and the pipe 120 are separately molded, and then the pipe 120 and the main body 110 are connected. It may be configured. For the sake of explanation, the main body 110 and the tube 120 will be described as separate bodies.

  The main body 110 includes through holes 111 (111A, 111B, 111C) that allow fluid to pass therethrough, and a flow path portion 112 that connects the through holes 111 to each other.

  In the present embodiment, the main body 110 has three through holes 111A, 111B, 111C. The through hole 111 communicates with the pipe 120. Therefore, the fluid such as the reagent passes through the tube 120 and the through hole 111. The through hole 111 communicates with the flow path portion 112.

  As shown in FIG. 2, in this embodiment, the lower portion of the through hole 111 is slightly wider. The flow channel portion 112 is in communication with the through hole 111 at the lower portion 111u of the through hole 111.

  The flow path portion 112 connects the through holes to each other. The operator mixes the plurality of reagents and the like in the flow path portion 112 by inserting the fluid such as the plurality of reagents and the like into the separate tubes 120. The flow path is composed of the flow path portion 112 and the bottom member 130.

  The pipe 120 has three pipes 120a, 120b, and 120c in this embodiment. In the present embodiment, for example, an operator puts a fluid such as another reagent into the pipe 120a and the pipe 120b, so that the reagents are mixed at the intersection of the flow path 112. Then, the operator can take out the mixed reagent through the tube 120c.

  As shown in FIG. 2, the bottom member 130 is connected to the bottom of the main body 110. As a result, the bottom surface is formed in the through hole 111 of the main body 110. Further, the bottom surface is formed in the flow path portion 112, and the flow path is formed. Examples of the bottom member 130 include a plastic film, a plastic sheet, glass and the like.

  Below, the injection-molding die 200 for molding an injection-molded product and a method for manufacturing the injection-molded product will be described.

<First Embodiment>
(Mold for injection molding 200)
As shown in FIG. 3, the injection molding die 200 includes a movable die 210 that is vertically movable and a fixed die 220. An injection part 230 for injecting a resin for injection molding is formed in a part between the movable mold 210 and the fixed mold 220. A cavity 240 in which an injection-molded product is molded is formed between the movable mold 210 and the fixed mold 220.

  The movable mold 210 includes a first pressing portion 211 having a pressure contact surface 211p that is in pressure contact with the fixed mold 220. There is a gap in the upper peripheral edge of the first pressing portion 211. This is for forming the tube 120 of the microchannel device 100. There are as many first pressing portions 211 as the number of through holes 111 provided in the main body 110 of the microchannel device 100.

  The fixed die 220 includes a convex portion 221 having a pressure contact surface 221p that comes into pressure contact with the movable die 210, and a flow path convex portion 222.

  The convex portion 221 includes a pressure contact surface 221p that is in pressure contact with the pressure contact surface 211p of the movable mold 210. The pressure contact surface 221p of the convex portion 221 is wider than the pressure contact surface 211p of the movable mold 210. The convex portion 221 is for forming the lower portion 111u of the through hole 111 of the microchannel device 100.

  The through hole 111 of the microchannel device 100 is formed by the first pressing portion 211 of the movable mold 210 and the convex portion 221 of the fixed mold 220.

  The flow path protrusions 222 connect the protrusions 221 to each other. The flow path convex portion 222 is for forming the flow path portion 112 of the micro flow path device 100.

The first pressing portion 211 and the convex portion 221 have at least one dimension in the pressure contact direction that is the minimum size required for contact between the pressure contact surface 211p of the movable mold 210 and the pressure contact surface 221p of the fixed mold 220. Is oversized.
FIG. 4 is a diagram showing the positional relationship between the pressure contact surface 211p of the movable mold 210 and the pressure contact surface 221p of the fixed mold 220, in the case where they are in actual pressure contact and in the case where they virtually overlap.

  In reality, the first pressing portion 211 and the convex portion 221 do not overlap each other, but the positional relationship after the first pressing portion 211 and the convex portion 221 before being pressure-contacted (that is, in the figure In the description below, the position of the pressure contact surface 211p in the case of virtually overlapping with each other will be referred to as the pressure contact surface 211pv, and the position of the actual pressure contact surface 211p will be referred to as the pressure contact surface 211pa.

  Further, when the first pressing portion 211 and the convex portion 221 virtually overlap with each other as described above, it is assumed that the pressure contact surface 221p remains as it is and only the pressure contact surface 211p shows a virtual position for explanation.

  That is, the pressure contact surface 221p may be a virtual position, and both the pressure contact surface 211p and the pressure contact surface 221p may be a virtual position. However, since the relative distance between the press contact surface 211p and the press contact surface 221p is the same, only the case where the press contact surface 211p is in a virtual position will be described.

  For example, when the vertical dimension of the first pressing portion 211 is longer than usual, the virtual position of the pressure contact surface 211p is the position of the pressure contact surface 211pv. However, the actual position of the pressure contact surface 211p is the position of the pressure contact surface 211pa.

  The distance (L1) between the pressure contact surface 211pv at the imaginary position and the pressure contact surface 211pa at the actual position has a correlation with the pressure contact force between the pressure contact surface 211p and the pressure contact surface 221p.

  Therefore, the pressure contact force between the pressure contact surface 211p and the pressure contact surface 221p is controlled by the distance (L1) between the virtual pressure contact surface 211pv and the actual position pressure contact surface 211pa.

  That is, when the distance (L1) between the pressure contact surface 211pv and the pressure contact surface 211pa increases, the pressure contact force between the pressure contact surface 211p of the first pressing portion 211 and the pressure contact surface 221p of the convex portion 221 increases.

  The distance (L1) between the pressure contact surface 211pv and the pressure contact surface 211pa is preferably 1 μm or more and 200 μm or less. In this case, there is an effect that burrs are unlikely to occur in a portion where a fluid such as a reagent passes. Further, in this case, deterioration of the mold can be reduced.

  That is, when the distance (L1) between the pressure contact surface 211pv and the pressure contact surface 211pa is less than 1 μm, the possibility of burrs increases. When the distance (L1) between the pressure contact surface 211pv and the pressure contact surface 211pa is larger than 200 μm, the mold is overloaded and the mold is likely to deteriorate. The distance (L1) between the pressure contact surface 211pv and the pressure contact surface 211pa is more preferably 20 μm or more and 150 μm or less.

  Further, it is preferable that both the first pressing portion 211 of the movable mold 210 and the convex portion 221 of the fixed mold 220 are made of metal.

  The movable mold 210 and the fixed mold 220 may be exchanged. Further, the fixed mold 220 may be a movable mold, that is, both may be movable molds.

(Method of manufacturing injection molded products)
Hereinafter, a method of manufacturing the microchannel device 100 using the injection molding die 200 of the first embodiment will be described with reference to FIG.

  The movable mold 210 descends, and the movable mold 210 and the fixed mold 220 come into pressure contact with each other. Specifically, the movable die 210 is lowered, and the pressure contact surface 211p of the first pressing portion 211 and the pressure contact surface 221p of the convex portion 221 are pressure contacted (step S11).

  At this time, the distance (L1) between the pressure contact surface 211pv and the pressure contact surface 211pa when the first pressing portion 211 and the convex portion 221 virtually overlap with each other as described above is 1 μm or more and 200 μm or less (step S12). ).

  The molding resin is injected into the cavity 240 from the injection part 230 (step S13).

  The injection-molded product is taken out of the injection-molding die 200 (step S14).

<Second Embodiment>
(Mold for injection molding 200)
In the second embodiment of the present invention, the second pressing portion 250 is configured separately from the fixed mold 220, and the pressure contact surface 211p of the first pressing portion 211 and the pressure contact surface 250p1 of the second pressing portion 250 are in pressure contact with each other. Is. Specifically, it is as follows. The description similar to that of the first embodiment will be simplified. Further, the second pressing portion 250 in the second embodiment corresponds to the first pin.

  As shown in FIG. 6, the injection molding die 200 according to the second embodiment includes a movable die 210, a fixed die 220, a second pressing portion 250, and a second fixing member 261 (fixing member). Including.

Since the structure of the movable mold 210 is the same as that of the first embodiment, the description thereof is omitted. As shown in FIG. 6, the fixed mold 220 includes a convex portion 221, which is in pressure contact with the first pressing portion 211, a flow channel convex portion 222, and a first through hole which penetrates the central portion of the convex portion 221 in plan view. 223 (through hole).

The second pressing portion 250 is inserted into the first through hole 223 . A second fixing member 261 is arranged below the second pressing portion and the fixed mold 220.

  The second pressing portion 250 is in pressure contact with the first pressing portion 211. Specifically, the pressure contact surface 250p1 of the second pressing portion 250 and the pressure contact surface 221p of the convex portion 221 are in pressure contact with the pressure contact surface 211p of the first pressing portion 211.

At least one of the first pressing portion 211, the convex portion 221, and the second pressing portion 250 has a dimension in the pressure contact direction, that is, the pressure contact surface 211p of the movable die 210, the pressure contact surface 221p of the fixed die 220, and the second pressure portion. The pressure contact surface 250p1 of 250 is formed to be oversized than the minimum size required for contact.
Similar to FIG. 4 of the first embodiment, FIG. 7 shows the positional relationship between the pressure contact surface 211p of the movable mold 210, the pressure contact surface 221p of the fixed mold 220, and the pressure contact surface 250p1 of the second pressing part 250. It is the figure which represented the case where it is pressingly contacting with, and the case where it overlapped virtually.

  In reality, the first pressing portion 211 does not overlap the convex portion 221 and the second pressing portion 250, but the first pressing portion 211 before the pressure contact, the convex portion 221, and the second pressing portion 250 However, the position of the pressure contact surface 211p in the case of virtually overlapping in the positional relationship after pressure contact (that is, the positional relationship in FIG. 6) is referred to as the pressure contact surface 211pv, and the actual position of the pressure contact surface 211p is referred to as the pressure contact surface 211pa. To do.

  Further, when the first pressing portion 211, the convex portion 221, and the second pressing portion 250 are supposed to virtually overlap with each other as described above, the pressing contact surface 221p remains as it is and only the pressing contact surface 211p shows a virtual position for explanation. And

  That is, the pressure contact surface 221p and the pressure contact surface 250p1 may be virtual positions, and both the pressure contact surface 211p and the pressure contact surface 250p1 and the pressure contact surface 221p may be virtual positions.

  However, since the relative distances between the press contact surface 211p and the press contact surface 221p and the press contact surface 250p1 are the same, only the case where the press contact surface 211p is in a virtual position will be described.

  For example, when the vertical dimension of the first pressing portion 211 is longer than usual, the virtual position of the pressure contact surface 211p is the position of the pressure contact surface 211pv. However, the actual position of the pressure contact surface 211p is the position of the pressure contact surface 211pa.

  The distance (L1) between the pressure contact surface 211pv at the imaginary position and the pressure contact surface 211pa at the actual position has a correlation with the pressure contact force between the pressure contact surface 211p and the pressure contact surface 221p.

  Therefore, the pressure contact force between the pressure contact surface 211p, the pressure contact surface 221p, and the pressure contact surface 250p1 is controlled by the distance (L1) between the virtual position pressure contact surface 211pv and the actual position pressure contact surface 211pa.

  That is, when the distance (L1) between the pressure contact surface 211pv and the pressure contact surface 211pa increases, the pressure contact surface 211p of the first pressing portion 211, the pressure contact surface 221p of the convex portion 221, and the pressure contact surface 250p1 of the second pressing portion 250 are separated. Pressing force becomes large.

  The distance (L1) between the pressure contact surface 211pv and the pressure contact surface 211pa is preferably 1 μm or more and 200 μm or less. In this case, there is an effect that burrs are unlikely to occur in a portion where a fluid such as a reagent passes. Further, in this case, deterioration of the mold can be reduced.

  That is, when the distance (L1) between the pressure contact surface 211pv and the pressure contact surface 211pa is less than 1 μm, the possibility of burrs increases. When the distance (L1) between the pressure contact surface 211pv and the pressure contact surface 211pa is larger than 200 μm, the mold is overloaded and the mold is likely to deteriorate. The distance (L1) between the pressure contact surface 211pv and the pressure contact surface 211pa is more preferably 20 μm or more and 150 μm or less.

  Further, it is preferable that the first pressing portion 211 of the movable mold 210, the convex portion 221 of the fixed mold 220, and the second pressing portion 250 are all made of metal.

  The movable mold 210 and the fixed mold 220 may be exchanged. Further, the fixed mold 220 may be a movable mold, that is, both may be movable molds.

(Method of manufacturing injection molded products)
Hereinafter, a method of manufacturing the microchannel device 100 using the injection molding die 200 according to the second embodiment will be described with reference to FIG. 8.

The movable mold 210 descends, and the movable mold 210 and the fixed mold 220 come into pressure contact with each other. Specifically, the movable mold 210 descends, and the pressure contact surface 211p of the first pressing portion 211 and the pressure contact surface 221p of the convex portion 221 and the pressure contact surface 250p1 of the second pressing portion 250 are pressure contacted (step S21).

  At this time, the distance (L1) between the pressure contact surface 211pv and the pressure contact surface 211pa when the first pressing portion 211, the convex portion 221, and the second pressing portion 250 are virtually overlapped as described above is 1 μm or more and 200 μm or less. (Step S22).

  The molding resin is injected into the cavity 240 from the injection part 230 (step S23).

  The injection-molded product is taken out of the injection-molding die 200 (step S24).

<Third Embodiment>
(Mold for injection molding 200)
In the third embodiment of the present invention, a third pressing portion 270 is configured separately from the movable mold 210, and the pressure contact surface 270p of the third pressing portion 270 and the pressure contact surface 221p of the convex portion 221 are in pressure contact with each other. . Specifically, it is as follows. The description similar to that of the first and second embodiments will be simplified. Further, the third pressing portion 270 in the third embodiment corresponds to the second pin.

  As shown in FIG. 9, the injection molding die 200 according to the third embodiment includes a movable die 210, a fixed die 220, a third pressing portion 270, and a first fixing member 260 (fixing member). Including.

The structure of the fixed mold 220 is the same as that of the first embodiment, and therefore its description is omitted. The movable mold 210 includes a second through hole 212 (through hole) for holding the third pressing portion 270.

  The first fixing member 260 is arranged above the third pressing portion 270 and the movable mold 210.

The pressure contact surface 270p of the third pressing portion 270 is in pressure contact with the pressure contact surface 221p of the convex portion 221 of the fixed mold 220. The third pressing portion 270 is fixed by the second through hole 212 of the movable mold 210 and the first fixing member 260.

  At least one of the dimensions of the third pressing portion 270 and the convex portion 221 in the pressure contact direction is the minimum required for the pressure contact surface 270p of the third press portion 270 and the pressure contact surface 221p of the fixed mold 220 to contact each other. Oversized rather than oversized.

  In reality, the third pressing portion 270 and the convex portion 221 do not overlap each other, but the third pressing portion 270 and the convex portion 221 before being pressed are virtually in a positional relationship after being pressed. In the following description, the position of the pressure contact surface 270p when the pressure contact surface 270p overlaps the pressure contact surface 270pv, and the actual position of the pressure contact surface 270p is the pressure contact surface 270pa.

  When the third pressing portion 270 and the convex portion 221 virtually overlap with each other as described above, it is assumed that the pressure contact surface 221p remains as it is and only the pressure contact surface 270p shows a virtual position for the sake of explanation.

  That is, the pressure contact surface 221p may be a virtual position, and both the pressure contact surface 270p and the pressure contact surface 221p may be a virtual position. However, since the relative distance between the pressure contact surface 270p and the pressure contact surface 221p is the same, only the case where the pressure contact surface 270p is in a virtual position will be described.

For example, when the vertical dimension of the third pressing portion 270 is longer than usual, the virtual position of the pressure contact surface 270p is the position of the pressure contact surface 270pv. However, the actual position of the pressure contact surface 270p is the position of the pressure contact surface 270pa.

  The distance (L1) between the virtual pressure contact surface 270pv and the actual pressure contact surface 270pa and the pressure contact force between the pressure contact surface 270p and the pressure contact surface 221p have a correlation.

  Therefore, the pressure contact force between the pressure contact surface 270p and the pressure contact surface 221p is controlled by the distance (L1) between the virtual pressure contact surface 270pv and the actual position pressure contact surface 270pa.

  That is, as the distance (L1) between the pressure contact surface 270pv and the pressure contact surface 270pa increases, the pressure contact force between the pressure contact surface 270p of the third pressing portion 270 and the pressure contact surface 221p of the convex portion 221 increases.

  The distance (L1) between the pressure contact surface 270pv and the pressure contact surface 270pa is preferably 1 μm or more and 200 μm or less. In this case, there is an effect that burrs are unlikely to occur in a portion where a fluid such as a reagent passes. Further, in this case, deterioration of the mold can be reduced.

  That is, when the distance (L1) between the pressure contact surface 270pv and the pressure contact surface 270pa is less than 1 μm, the possibility of burrs increases. Further, when the distance (L1) between the pressure contact surface 270pv and the pressure contact surface 270pa is larger than 200 μm, the mold is overloaded and the mold is likely to deteriorate. The distance (L1) between the pressure contact surface 270pv and the pressure contact surface 270pa is more preferably 20 μm or more and 150 μm or less.

  Further, it is preferable that both the third pressing portion 270 and the convex portion 221 of the fixed mold 220 are made of metal.

  The movable mold 210 and the fixed mold 220 may be exchanged. Further, the fixed mold 220 may be a movable mold, that is, both may be movable molds.

  In FIG. 10, the dimensions of the third pressing portion 270 and the convex portion 221 in the pressure contact direction are not oversized as described above, and the pressure contact surface 270p of the third pressing portion 270 and the pressure contact surface 221p of the convex portion 221 are not formed. Is an example when the size is the minimum required for contact. In this case, the press contact force enlarging member 280 is arranged between the third pressing portion 270 and the first fixing member 260.

  Since the pressing force enlarging member 280 is arranged between the third pressing portion 270 and the first fixing member 260, the third pressing portion 270 and the convex portion 221 before being pressed are pressed together. When the virtual arrangement is performed in the positional relationship of, the virtual overlap can occur as described above. The thickness of the pressing force enlarging member 280 in the pressing direction corresponds to this virtual overlap distance. As a result, the pressure contact force between the pressure contact surface 270p of the third pressing portion 270 and the pressure contact surface 221p of the convex portion 221 increases. Even in this case, the same effect as described above can be obtained.

  The material of the pressing force enlarging member 280 is preferably a metal such as SUS (SUS304, 403), but may be any material as long as it is a hard material.

(Method of manufacturing injection molded products)
Hereinafter, a method of manufacturing the microchannel device 100 using the injection molding die 200 of the third embodiment will be described with reference to FIG. 11.

  The movable mold 210 descends, and the movable mold 210 and the fixed mold 220 come into contact with each other. Specifically, the movable mold 210 is lowered, and the pressure contact surface 270p of the third pressing portion 270 and the pressure contact surface 221p of the convex portion 221 are pressure contacted (step S31).

  At this time, the distance (L1) between the pressure contact surface 270pv and the pressure contact surface 270pa when the third pressing portion 270 and the convex portion 221 virtually overlap with each other as described above is set to 1 μm or more and 200 μm or less (step S32). .

  The molding resin is injected into the cavity 240 from the injection part 230 (step S33).

  The injection-molded article is taken out of the injection-molding die 200 (step S34).

<Fourth Embodiment>
(Mold for injection molding 200)
The fourth embodiment of the present invention uses the second pressing portion 250 and the third pressing portion 270. Specifically, it is as follows. The description similar to that of the first embodiment, the second embodiment, and the third embodiment will be simplified. The second pressing portion 250 and the third pressing portion 270 in the fourth embodiment correspond to the first pin and the second pin, respectively .

  As shown in FIG. 12, the injection molding die 200 includes a movable die 210, a fixed die 220, a third pressing portion 270, a second pressing portion 250, a first fixing member 260, and a second fixing member 260. The fixing member 261 is included.

  The structure of the movable mold 210 is the same as that of the third embodiment, and therefore its description is omitted. Further, the structure of the fixed mold 220 is the same as that of the second embodiment, and therefore its description is omitted.

  The pressure contact surface 270p of the third pressing portion 270 is in pressure contact with the pressure contact surface 250p1 of the second pressing portion 250 and the pressure contact surface 221p of the convex portion 221.

  At least one of the third pressing portion 270, the second pressing portion 250, and the convex portion 221 has a dimension in the pressure contact direction that is different from the pressure contact surface 270p of the third pressing portion 270 and the pressure contact surface 250p1 of the second pressing portion 250 and the convex portion. The pressure contact surface 221p of 221 is formed to be oversized than the minimum size required for contact.

  In reality, the third pressing portion 270 does not overlap the convex portion 221 and the second pressing portion 250, but the third pressing portion 270 before being pressed against each other, the convex portion 221, and the second pressing portion 250. However, the position of the pressure contact surface 270p in the case of virtually overlapping in the positional relationship after the pressure contact is referred to as the pressure contact surface 270pv, and the actual position of the pressure contact surface 270p is referred to as the pressure contact surface 270pa.

  If the third pressing portion 270 and the convex portion 221 and the second pressing portion 250 virtually overlap with each other as described above, the pressing surface 221p and the pressing surface 250p1 are virtually left as they are for the sake of explanation. It indicates the position.

  That is, the pressure contact surface 221p and the pressure contact surface 250p1 may be virtual positions, and both the pressure contact surface 270p and the pressure contact surface 250p1 and the pressure contact surface 221p may be virtual positions.

  However, since the relative distances between the press contact surface 270p and the press contact surface 221p and the press contact surface 250p1 are the same, only the case where the press contact surface 270p is in a virtual position will be described.

For example, when the vertical dimension of the third pressing portion 270 is longer than usual, the virtual position of the pressure contact surface 270p is the position of the pressure contact surface 270pv. However, the actual position of the pressure contact surface 270p is the position of the pressure contact surface 270pa.

  The distance (L1) between the virtual pressure contact surface 270pv and the actual pressure contact surface 270pa, and the pressure contact surface 270p and the pressure contact surfaces 221p and 250p1 have a correlation.

  Therefore, the pressure contact force between the pressure contact surface 270p and the pressure contact surface 221p and the pressure contact surface 250p1 is controlled by the distance (L1) between the virtual pressure contact surface 270pv and the actual position pressure contact surface 270pa.

  That is, when the distance (L1) between the pressure contact surface 270pv and the pressure contact surface 270pa increases, the pressure contact surface 270p of the third pressing portion 270 and the pressure contact surface 221p of the convex portion 221 and the pressure contact surface 250p1 of the second pressing portion 250 are separated. Pressing force becomes large.

  The distance (L1) between the pressure contact surface 270pv and the pressure contact surface 270pa is preferably 1 μm or more and 200 μm or less. In this case, there is an effect that burrs are unlikely to occur in a portion where a fluid such as a reagent passes. Further, in this case, deterioration of the mold can be reduced.

  That is, when the distance (L1) between the pressure contact surface 270pv and the pressure contact surface 270pa is less than 1 μm, the possibility of burrs increases. Further, when the distance (L1) between the pressure contact surface 270pv and the pressure contact surface 270pa is larger than 200 μm, the mold is overloaded and the mold is likely to deteriorate. The distance (L1) between the pressure contact surface 270pv and the pressure contact surface 270pa is more preferably 20 μm or more and 150 μm or less.

  Further, it is preferable that the third pressing part 270 of the movable mold 210, the convex part 221 of the fixed mold 220, and the second pressing part 250 are all made of metal.

  The movable mold 210 and the fixed mold 220 may be exchanged. Further, the fixed mold 220 may be a movable mold, that is, both may be movable molds.

  In FIG. 13, the size of the third pressing portion 270 in the pressing direction of the convex portion 221 and the second pressing portion 250 is not oversized as described above, and the pressing surface 270p of the third pressing portion 270 and the third pressing portion 270 are not oversized. 2 This is an embodiment in the case where the pressure contact surface 250p1 of the pressing portion 250 and the pressure contact surface 221p of the convex portion 221 have the minimum size required for contact.

  In FIG. 13, a press contact force enlarging member 280 is arranged between the third pressing portion 270 and the first fixing member 260.

  Since the pressure contact force enlarging member 280 is arranged between the third pressing portion 270 and the first fixing member 260, the third pressing portion 270, the second pressing portion 250, and the convex portion 221 before being pressed against each other. Are virtually arranged in the positional relationship after they are pressed against each other, the virtual overlap can be achieved as described above. The thickness of the pressing force enlarging member 280 in the pressing direction corresponds to this virtual overlap distance. As a result, the pressure contact force between the pressure contact surface 270p of the third pressing portion 270 and the pressure contact surface 221p of the convex portion 221 increases. Even in this case, the same effect as described above can be obtained.

  The material of the pressing force enlarging member 280 is preferably a metal such as SUS (SUS304, 403), but may be any material as long as it is a hard material.

(Method of manufacturing injection molded products)
Hereinafter, a method of manufacturing the microchannel device 100 using the injection molding die 200 of the fourth embodiment will be described with reference to FIG.

  The movable mold 210 descends, and the movable mold 210 and the fixed mold 220 come into pressure contact with each other. Specifically, the movable die 210 descends, and the pressure contact surface 270p of the third pressing portion 270 and the pressure contact surface 221p of the convex portion 221 and the pressure contact surface 250p1 of the second pressing portion 250 are pressure contacted (step S41).

  At this time, the distance (L1) between the pressure contact surface 270pv and the pressure contact surface 270pa when the third pressing portion 270 and the convex portion 221 virtually overlap with each other as described above is set to 1 μm or more and 200 μm or less (step S42). .

  The molding resin is injected into the cavity 240 from the injection part 230 (step S43).

  The injection-molded product is taken out of the injection-molding die 200 (step S44).

<Fifth Embodiment>
(Mold for injection molding 200)
As shown in FIG. 15, the fifth embodiment is a modification of the fourth embodiment. In the fifth embodiment, the pressure contact surface 250p1 of the second pressing portion 250 and the pressure contact surface 270p of the third pressing portion 270 have substantially the same shape in plan view.

In this case, the press contact position between the press contact surface 250p1 of the second press portion 250 and the press contact surface 270p of the third press portion 270 can be changed by changing the vertical dimension of the second press portion 250 and the third press portion 270. , Can be changed.
Since the second pressing portion 250 and the third pressing portion 270 are in contact with each other in at least one dimension in the pressing direction, the pressing surface 250p1 of the second pressing portion 250 and the pressing surface 270p of the third pressing portion 270 are in contact with each other. It is oversized than the minimum required size.
Therefore, in reality, the second pressing part 250 and the third pressing part 270 do not overlap each other, but after the second pressing part 250 and the third pressing part 270 before being pressed are pressed together. Virtually overlap due to the positional relationship.

  By being configured so that this virtual overlap occurs, the pressure contact force between the pressure contact surface 250p1 of the second pressing portion 250 and the pressure contact surface 270p of the third pressing portion 270 increases, and burrs are less likely to occur. However, in a very rare case, even if burrs are generated in the pressure contact portion between the pressure contact surface 250p1 of the second pressing portion 250 and the pressure contact surface 270p of the third pressing portion 270, the pressure contact position is higher than the upper surface of the convex portion 221. Since it is displaced upward, the reagent flow path of the micro flow path device 100 is unlikely to be affected.

  Further, similarly to the fourth embodiment, the pressing force enlarging member 280 may be arranged between the third pressing portion 270 and the first fixing member 260.

(Method of manufacturing injection molded products)
Hereinafter, a method for manufacturing the microchannel device 100 using the injection molding die 200 according to the fifth embodiment will be described with reference to FIG.

  The movable mold 210 descends, and the movable mold 210 and the fixed mold 220 come into pressure contact with each other. Specifically, the movable mold 210 is lowered, and the pressure contact surface 270p of the third pressing portion 270 and the pressure contact surface 250p1 of the second pressing portion 250 are pressure contacted (step S51).

At this time, the distance (L1) between the press contact surface 270pv and the press contact surface 270pa when the third press portion 270 and the second press portion 250 are virtually overlapped as described above is set to 1 μm or more and 200 μm or less (step. S52).

  The molding resin is injected into the cavity 240 from the injection part 230 (step S53).

  The injection-molded product is taken out of the injection-molding die 200 (step S54).

<Sixth Embodiment>
(Mold for injection molding 200)
The sixth embodiment of the present invention uses the second pressing portion 250 and the third pressing portion 270. Specifically, it is as follows. Note that description similar to that of the first embodiment, the second embodiment, the third embodiment, the fourth embodiment, and the fifth embodiment will be simplified. Further, the second pressing portion 250 in the sixth embodiment corresponds to the first pin .

  As shown in FIG. 17, the injection molding die 200 according to the sixth embodiment includes a movable die 210, a fixed die 220, a third pressing portion 270, and a second pressing portion 250.

  The structure of the movable mold 210 is the same as that of the third embodiment, and therefore its description is omitted. Further, the fixed mold 220 has a third through hole 224 and a flow path convex portion 222. The second pressing portion 250 is inserted into the third through hole 224.

  The pressure contact surface 270p of the third pressing portion 270 is in pressure contact with the pressure contact surface 250p1 of the second pressing portion 250.

  At least one of the fixed die 220 and the second pressing portion 250 has a minimum dimension in the pressure contact direction because the inner surface of the third through hole 224 of the fixed die 220 and the side surface of the second pressing portion 250 are in contact with each other. It is oversized than the required size.

  As a result, the inner surface of the third through hole 224 and the side surface of the second pressing portion 250 are brought into pressure contact with each other.

  In reality, the fixed mold 220 and the second pressing part 250 do not overlap each other, but the fixed mold 220 and the second pressing part 250 before being pressed are virtually in a positional relationship after being pressed. The position of the inner surface of the third through hole 224 in the case of overlapping will be referred to as a pressure contact surface 224pv, and the actual position of the inner surface of the third through hole 224 will be referred to as a pressure contact surface 224pa.

  Further, when the fixed mold 220 and the second pressing portion 250 are virtually overlapped as described above, for the sake of explanation, it is assumed that the pressure contact surface 250p2 remains as it is and only the pressure contact surface 224p shows a virtual position.

  That is, the pressure contact surface 250p2 may be a virtual position, and both the pressure contact surface 250p2 and the pressure contact surface 224p may be a virtual position.

  However, since the relative distance between the press contact surface 224p and the press contact surface 250p2 is the same, only the case where the press contact surface 224p is in a virtual position will be described.

  There is a correlation between the distance (L21 + L22) between the virtual pressure contact surface 224pv and the actual pressure contact surface 224pa and the pressure contact force between the pressure contact surface 224p and the pressure contact surface 250p2.

Therefore, the pressure contact force between the pressure contact surface 224p and the pressure contact surface 250p2 is controlled by the distance (L21 + L22) between the virtual pressure contact surface 224pv and the actual position pressure contact surface 224pa.

  That is, when the distance (L21 + L22) between the pressure contact surface 224pv and the pressure contact surface 224pa increases, the pressure contact force between the pressure contact surface 224p and the pressure contact surface 250p2 increases.

  The distance (L21 + L22) between the pressure contact surface 224pv and the pressure contact surface 224pa is preferably 1 μm or more and 200 μm or less. In this case, there is an effect that burrs are unlikely to occur in a portion where a fluid such as a reagent passes. Further, in this case, deterioration of the mold can be reduced.

  When the distance (L21 + L22) between the pressure contact surface 224pv and the pressure contact surface 224pa is less than 1 μm, burrs are likely to occur. Further, when the distance (L21 + L22) between the pressure contact surface 224pv and the pressure contact surface 224pa is larger than 200 μm, the mold is overloaded and the mold is likely to deteriorate. The distance (L21 + L22) between the pressure contact surface 224pv and the pressure contact surface 224pa is more preferably 20 μm or more and 150 μm or less.

  Further, it is preferable that the third pressing part 270 of the movable mold 210, the convex part 221 of the fixed mold 220, and the second pressing part 250 are all made of metal.

  The movable mold 210 and the fixed mold 220 may be exchanged. Further, the fixed mold 220 may be a movable mold, that is, both may be movable molds.

  Further, the contact force enlarging member 280 may be arranged between the third pressing portion 270 and the first fixing member 260.

(Method of manufacturing injection molded products)
A method for manufacturing the micro flow channel device 100 using the injection molding die 200 according to the sixth embodiment will be described below with reference to FIG.

  The movable mold 210 descends, and the movable mold 210 and the fixed mold 220 come into pressure contact with each other. Specifically, the movable die 210 is lowered, and the pressure contact surface 270p of the third pressing portion 270 and the pressure contact surface 250p1 of the second pressing portion 250 are pressure contacted (step S61).

  At this time, the distance (L21 + L22) between the press contact surface 224pv and the press contact surface 224pa when the third press portion 270 and the second press portion virtually overlap with each other is set to 1 μm or more and 200 μm or less (step S62).

  The molding resin is injected into the cavity 240 from the injection part 230 (step S63).

  The injection-molded product is taken out of the injection-molding die 200 (step S64).

(Comparison between the injection mold according to the present invention and the injection mold according to the comparative embodiment)
Next, the burr states of the embodiment of the present invention and the following comparative embodiments will be compared.

  FIG. 19 is a cross-sectional side view of an injection molding die 300 for molding the microchannel device 100, which is an injection molded product. For comparison with the embodiment of the present invention, FIG. 19 is a sectional view of the same portion as the injection molding die 200.

<Comparison form>
(Mold for injection molding 300)
The injection molding die 300 in the comparative form includes a movable die 310, a fixed die 320, a convex member 350, a fixing member 380, and a pin 370. The fixed mold 320 has a flow path projection 321.

  The basic configuration is similar to that of the embodiment. Therefore, description of individual members and the like will be omitted. Further, the pin 370 and the convex member 350 are not oversized in the pressure contact direction between the pin 370 and the convex member 350 as in the present embodiment as described above, and the pin 370 and the convex member 350 are not formed. Is formed to the minimum size required for contact. Therefore, there is no virtual overlapping portion as described above.

(Comparison between the micro flow channel device 100 molded by the injection molding die 200 and the micro flow channel device 100 molded by the injection molding die 300)
FIG. 20A is a partially enlarged view of the microchannel device 100 molded by the injection molding die 300. Specifically, FIG. 20A is a partially enlarged view of the through hole 111 and the flow channel portion 112 as seen from the back surface of the main body 110 of the micro flow channel device 100.

  The through hole 111 in FIG. 20 (a) is just formed by the pin 370. The lower portion 111u of the through hole 111 in FIG. 20A is a portion formed by the convex member 350. The flow path portion 112 in FIG. 20A is formed by the flow path convex portion 321.

  20 (b) and 20 (c) are schematic diagrams of a partially enlarged view of a portion surrounded by a frame line in FIG. 20 (a). That is, FIG. 20 (b) and FIG. 20 (c) are schematic views of a partially enlarged view of the injection-molded product molded by the injection molding die 300.

  As shown in FIG. 20B, in the injection molding die 300, a burr B was generated between the back surface of the main body 110 of the microchannel device 100 and the lower portion 111u of the through hole 111. Further, in the injection molding die 300, the burr B was generated between the flow path portion 112 and the lower portion 111u of the through hole 111.

  That is, in this case, the burr B may hinder the flow of the fluid such as the reagent.

  Further, as shown in FIG. 20C, in the injection molding die 300, a burr B may be generated in the lower portion 111u of the through hole 111. Also in this case, the burr B may hinder the flow of the fluid such as the reagent.

  On the other hand, in the injection molding die 200 according to the present invention, the burr B did not occur.

  From the above, according to the present invention, the pressure contact force between the movable mold 210 and the fixed mold 220 becomes large. As a result, burrs are less likely to occur at the contact portion between the movable mold 210 and the fixed mold 220.

  Further, according to the present invention, the pressure contact force between the second pressing part 250 or the third pressing part 270 and the movable mold 210 or the fixed mold 220 becomes large. As a result, burrs are less likely to occur at the contact portion between the second pressing part 250 or the third pressing part 270 and the movable mold 210 or the fixed mold 220.

Further, according to the present invention, the pressure contact force between the second pressing portion 250 and the third pressing portion 270 becomes large. As a result, burrs are less likely to occur at the contact portion between the second pressing portion 250 and the third pressing portion 270.

  In addition, the contact position between the second pressing portion 250 and the third pressing portion 270 can be adjusted by changing the longitudinal dimensions of the second pressing portion 250 and the third pressing portion 270.

  As a result, even if burrs are generated at the contact portion between the second pressing portion 250 and the third pressing portion 270, the flow of the fluid such as the reagent is unlikely to be affected.

  Further, according to the present invention, in the injection-molded product, burrs are less likely to occur in the portion where the flow path formed by the flow path convex portion 222 and the third through hole 224 are connected. As a result, the burr is less likely to obstruct the flow of fluid such as a reagent.

  Further, according to the present invention, even if the second pressing portion 250 or the third pressing portion 270 has a normal size, the injection pressing mold includes the press contact force expanding member 280, so that the second pressing portion 250 or The pressure contact force of the third pressing portion 270 can be increased. As a result, there is an effect that burrs are unlikely to occur at the contact portion between the third pressing portion 270 and the second pressing portion 250 or the fixed mold 220.

In the present invention, the microchannel device 100 corresponds to an “injection molded product”, the movable mold 210 corresponds to a “ second mold ”, the fixed mold 220 corresponds to a “ first mold ”, The second pressing portion 250 corresponds to the “ first pin ”, the third pressing portion 270 corresponds to the “ second pin ”, and the convex portion 221 corresponds to the “protruding portion”.

Further, in the present invention, step S11, step S21, step S31, step S41, step S51 and step S61 correspond to the "pressing step", and step S13, step S23, step S33, step S43, step S53 and step S63 are performed. It corresponds to the “injection process”.

  Although the preferred embodiment of the present invention is as described above, the present invention is not limited thereto. It will be appreciated that various other embodiments may be made without departing from the spirit of the invention. Furthermore, in the present embodiment, the actions and effects of the configuration of the present invention are described, but these actions and effects are merely examples and do not limit the present invention.

100 Micro flow channel device (injection molded product)
110 main body 111 through hole 112 flow path 200 injection molding die 210 movable die ( second die )
211 First Pressing Part 212 Second Through Hole 220 Fixed Mold ( First Mold )
221 Convex part (projection part)
222 Convex portion for flow path 223 First through hole 224 Third through hole (through hole)
240 cavity 250 second pressing portion ( first pin )
260 1st fixing member 261 2nd fixing member 270 3rd pressing part ( 2nd pin )
280 Pressurizing force expansion member 300 Injection molding die 310 Movable die 320 Fixed die 321 Flow path convex member 340 Cavity 350 Convex member 360 Fixed member 370 Pin

Claims (15)

A cavity provided with a first mold and a second mold that are pressed against each other, the second mold is a movable mold , and a resin is injected between the first mold and the second mold. A mold for injection molding for forming
Compared to before pressure contact, the first mold and the second mold are compressed and deformed in a direction perpendicular to the pressure contact surface in a total of 20 μm or more and 150 μm or less in total in the pressed state. Type. A cavity provided with a first mold and a second mold that are pressed against each other, the second mold is a movable mold , and a resin is injected between the first mold and the second mold. A mold for injection molding for forming
The first mold is provided with at least one metal first pin having a pressure contact surface for pressure contact with the second mold at the tip.
An injection molding mold in which the first pin and the second mold are compressed and deformed in a direction perpendicular to the pressure contact surface in a total amount of 20 μm or more and 150 μm or less in comparison with those before being pressed .   A cavity provided with a first mold and a second mold that are pressed against each other, the second mold is a movable mold, and a resin is injected between the first mold and the second mold. A mold for injection molding for forming
  The second mold is provided with at least one metal second pin having a pressure contact surface at a tip thereof, which is pressed against the first mold,
  An injection molding mold in which the second pin and the first mold are compressed and deformed in a direction perpendicular to the pressure contact surface in a total amount of 20 μm or more and 150 μm or less in comparison with those before being pressed. The second contact with the pin, comprising a contact force expansion member for increasing the contact pressure between the second pin and said first mold, injection mold according to claim 3. A cavity provided with a first mold and a second mold that are pressed against each other, the second mold is a movable mold , and a resin is injected between the first mold and the second mold. A mold for injection molding for forming
The first mold is provided with at least one metal first pin having a pressure contact surface at its tip,
The second mold is provided with a second metal pin having a pressure contact surface at a tip thereof, which is in pressure contact with the first pin.
An injection molding mold in which the first pin and the second pin are compressed and deformed in the direction perpendicular to the pressure contact surface in a total amount of 1 μm or more and 200 μm or less in comparison with those before the pressure contact . The first mold is provided with a first through hole through which the first pin penetrates,
The injection molding die according to claim 5 , wherein the second die is provided with a second through hole that allows the second pin to penetrate therethrough. Wherein the first mold has a protrusion which is the second pin and pressed against the periphery of the first through-hole, according to claim 6 injection mold according. In contact with the second pin, said second pin, said first pin or contact pressure expansion member for increasing the contact pressure between the first mold is provided, in any one of claims 5 to 7 The injection molding mold described. The mold for injection molding according to any one of claims 1 to 7, wherein the first mold includes a convex portion for a micro flow channel groove. A cavity provided with a first mold and a second mold that are pressed against each other, the second mold is a movable mold, and a resin is injected between the first mold and the second mold. A mold for injection molding for forming
The first mold is provided with at least one third through hole and a metal first pin that is penetrated by the third through hole and has a pressure contact surface at a tip thereof.
The second mold is provided with a second metal pin having a pressure contact surface at a tip thereof, which is in pressure contact with the first pin.
The first mold has a flow path protrusion for forming a flow path in a molded product, which is connected to the third through hole.
An injection molding mold in which the inner surface of the third through hole, which connects the third through hole and the convex portion for the flow path, and the side surface of the first pin are in pressure contact with each other. In the state in which the side surface of the first pin and the inner surface of the third through hole where the third through hole and the flow path convex portion are connected are pressed against each other, The injection-molding die according to claim 10 , which is compression-deformed in a total of 1 μm or more and 200 μm or less in a direction perpendicular to the longitudinal direction of the through hole . The injection molding die according to claim 10 or 11, wherein the first die has a protrusion portion that is in pressure contact with the second pin at a peripheral portion of the third through hole. A cavity provided with a first mold and a second mold that are pressed against each other, the second mold is a movable mold, and a resin is injected between the first mold and the second mold. A method of manufacturing an injection-molded article using a mold for injection molding, which comprises:
A pressure contact step of pressure contacting the first mold and the second mold;
An injection step of injecting resin into the cavity,
Compared with the state before pressure contact, in the state of pressure contact, the first mold and the second mold are compressed and deformed in a direction perpendicular to the pressure contact surface by a total of 20 μm or more and 150 μm or less . Production method. A cavity provided with a first mold and a second mold that are pressed against each other, the second mold is a movable mold, and a resin is injected between the first mold and the second mold. A method of manufacturing an injection-molded article using a mold for injection molding, which comprises:
The first mold includes at least one metal first pin having a pressure contact surface at a tip thereof to be pressure-contacted with the second mold,
A press contacting step in which the second die and the first pin are in pressure contact ,
An injection step of injecting resin into the cavity,
A method for manufacturing an injection-molded product, in which, in the pressed state, the first pin and the second mold are compressed and deformed in a direction perpendicular to the press-contact surface in a total of 20 μm or more and 150 μm or less as compared with before pressing. . A cavity provided with a first mold and a second mold that are pressed against each other, the second mold is a movable mold, and a resin is injected between the first mold and the second mold. A method of manufacturing an injection-molded article using a mold for injection molding, which comprises:
The first mold is provided with at least one metal first pin having a pressure contact surface at its tip,
The second mold is provided with a second metal pin having a pressure contact surface at a tip thereof, which is in pressure contact with the first pin.
A pressure contact step of pressure contacting the first pin and the second pin,
An injection step of injecting resin into the cavity,
A method for manufacturing an injection-molded article , wherein, in the pressed state, the first pin and the second pin are compressed and deformed in a direction perpendicular to the press-contact surface in a total amount of 1 μm or more and 200 μm or less as compared with before pressing .