Patent Description:
<CIT> discloses a method of directly attaching a tire attached sensor to a tire by using an epoxy-based adhesive which has viscosity at room temperature and is hardened at a temperature equal to or lower than <NUM>. In the method, hardening of the adhesive takes at least several to <NUM> hours. Hence, it is inconvenient that the sensor is attached in an appropriate manner when a tire is released during a tire manufacturing process or attachment has to be completed in advance in a case of replacement of a tire. In addition, a sensor is directly exposed to the outside, and thus there is a high possibility that a sensor will be damaged when foreign matter is contained inside a tire.

<CIT> discloses a method in which a tire sensor is attached to a side wall and is vulcanized during a molding process. Since the sensor is attached under an inner liner, it is not possible to replace the sensor. In addition, in a case of measuring pressure of a tire, there is a disadvantage that the sensor is covered with the inner liner and thus it is difficult to use a sensor such as a MEMS which detects air pressure in a hole of a pressure sensor.

<CIT> discloses a method in which a foam strip is formed at a tire inner surface, that is, a surface of an inner liner, and a sensor is positioned inside the foam strip. Since the foam strip is flexible, acceleration information which is transmitted through a tire is not directly transmitted to the sensor. Hence, it is inconvenient that the acceleration information has to be compared with a value directly measured at a tire surface.

<CIT> discloses an embodiment in which an acceleration sensor is embedded inside a tire. In the embodiment, since the acceleration sensor is embedded inside the tire, there is no risk of detachment of the sensor due to movement of the tire; however, the sensor is contained in a tire structure as foreign matter and thus durability can be affected.

<CIT> discloses a pocket structure into which a tire attached sensor is inserted. The pocket structure is formed by steps of forming a patch for forming a pocket on an inner liner through an adhesive attaching method, a molding method, or a vulcanization method and forming a mounting structure on the patch. In addition, a structure in which a hole is formed at a side of the mounting structure to improve transmission and reception sensitivity of radio waves and enhance liquid flow is employed. However, when the pocket and the mounting structure are separately formed, an interface therebetween is vulnerable to an external force, and thus there is a high possibility that the sensor can be detached during rotation of a tire.

<CIT> discloses a method in which a fastener, to which a sensor can be coupled, is disposed and vulcanized to be fixed on a carcass at a tire inner surface, and then the sensor is coupled to the fastener. The sensor can be replaced by using the fastener, and adhesion is more increased by using a vulcanization method than using an adhesive. However, since a fastener has to be inserted before a vulcanization process, there is a disadvantage of adding a further manufacturing process, and there is another disadvantage that pressure can be ununiformly applied during vulcanization due to the fastener.

<CIT> discloses a method in which a patch is attached to a vulcanized tire and a sensor is inserted into the patch. The attachment of a patch is performed by attaching various rubber patches to a cured tire and fixing the patches by sewing or using an adhesive so as not to be detached. However, as the tire rotates, stress is applied in an unintegrated method, and a problem arises in that there is a high possibility that a patch can be detached when a level of stress increases.

<CIT> discloses a method in which fasteners are fitted inside a tire to couple sensors to the fasteners, and the sensors and upper and lower cases are coupled to and are fixed to the fitting structure. The method is advantageous in that a sensor can be strongly fixed and replacement thereof is possible; however, an inside of a tire is damaged in a process of fitting a fastener so as to fix the sensor, and thus there is a possibility that it is difficult to obtain sufficient durability suitable for long-time running.

<CIT> describes a monitoring device for tires for vehicle wheels comprising: an electronic unit; a connecting member configured for constraining said electronic unit to a tire, said connecting member comprising: a first and a second base portion, mutually separated by a separated region, each of said base portions having a respective base surface associable with an inner surface of a tire; a housing portion associated with said base portions defining, in cooperation with said base portions, a cavity for housing said electronic unit, wherein said electronic unit comprises at least one sensor, at least one antenna and a holding body for housing at least said sensor and said antenna, wherein said electronic unit is inserted in said cavity.

<CIT> describes tire module for vehicle tires, wherein a bearing for cushioning mechanical stresses is arranged between the underside of an electronic module and the inside of the tire.

Patent Literature <NUM>: Korean Patent Registration.

An object of the invention to solve such problems is to provide a manufacturing method of a tire integrated electronic device by which the electronic device is inhibited from damaging a tire by being detached from a rubber mount.

Therefore, the invention provides a manufacturing method of a tire integrated electronic device according to claim <NUM> and a tire attached with an integrated electronic device according to claim <NUM>.

Technical objects to be achieved by the invention are not limited to the technical object mentioned above, and the following description enables other unmentioned technical objects to be clearly understood by a person of ordinary skill in the art to which the invention belongs.

According to a configuration of the invention to achieve the object described above, there is provided a manufacturing method of a tire integrated electronic device, including: a) step of positioning an electronic device mockup portion inside a first mold unit and a second mold unit; b) step of performing injection molding or compression molding by injecting unvulcanized rubber inside the first mold unit and the second mold unit such that the unvulcanized rubber encloses the electronic device mockup portion; c) step of unmolding a rubber mount unit molded to enclose the electronic device mockup portion; d) step of inserting an electronic device unit into a lower end portion of the unmolded rubber mount unit; and e) step of attaching the electronic device unit-inserted rubber mount unit to an inner liner of a tire. The rubber mount unit is molded to have a bottom body and an insertion hole at a lower portion of the rubber mount unit in the bottom body of the rubber mount unit, through which the electronic device unit is to be inserted into the lower end portion of the rubber mount unit.

According to an embodiment of the invention, the a) step may include: a1) step of preparing the first mold unit and the second mold unit; a2) step of positioning the electronic device mockup portion at an inner center of the first mold unit and the second mold unit; and a3) step of closing the first mold unit and the second mold unit.

According to the embodiment of the invention, in the a2) step, the electronic device mockup portion may be provided to have an antenna portion located at a position corresponding to an antenna hole forming portion.

According to the embodiment of the invention, the b) step includes: b1) step of injecting the unvulcanized rubber inside the first mold unit and inside the second mold unit; and b2) step of maintaining a preset vulcanization temperature for a preset vulcanization time so as to induce a crosslinking reaction in the injected unvulcanized rubber.

According to the embodiment of the invention, in the b1) step, the unvulcanized rubber may fill insides of the first mold unit and the second mold unit to enclose the electronic device mockup portion, and the unvulcanized rubber may be provided to enclose the electronic device mockup portion except for the antenna hole forming portion located at an upper part of the electronic device mockup portion and a position corresponding to the insertion hole located at a lower part of the electronic device mockup portion.

According to the embodiment of the invention, in the b2) step, the vulcanization temperature may be set in a range of <NUM> to <NUM>, and the vulcanization time may be set in a range of one minute to <NUM> minutes.

According to the embodiment of the invention, in the c) step, the electronic device mockup portion is unmolded from the rubber mount unit.

According to the embodiment of the invention, in the d) step, the electronic device unit may be inserted into the rubber mount unit through the insertion hole.

According to the embodiment of the invention, the insertion hole may be formed to have a multi-step structure such that an air layer is formed between the electronic device unit and the inner liner without a surface-to-surface contact between a bottom surface of the electronic device unit and a surface of the inner liner.

According to the embodiment of the invention, the rubber mount unit may be formed to have a bottom having a thickness of <NUM> to <NUM>.

According to the embodiment of the invention, the insertion hole may be formed to have an area as large as <NUM>% to <NUM>% of a bottom area of the electronic device unit.

According to another configuration of the invention to achieve the object described above, there is provided an integrated electronic device that is manufactured in accordance with the manufacturing method of a tire integrated electronic device.

According to still another configuration of the invention to achieve the object described above, there is provided a tire attached with an integrated electronic device that is manufactured in accordance with the manufacturing method of a tire integrated electronic device.

Hereinafter, the invention is to be described with reference to the accompanying drawings. However, the invention can be realized as various different examples, and thus is not limited to embodiments described here. Besides, a part irrelevant to the description is omitted from the drawings in order to clearly describe the invention, and similar reference signs are assigned to similar parts through the entire specification.

In the entire specification, a case where a certain part is "connected to (attached to, in contact with, or coupled to)" another part means not only a case where the parts are "directly connected" to each other, but also a case where the parts are "indirectly connected" to each other with another member interposed therebetween. In addition, a case where a certain part "comprises" a certain configurational element does not mean that another configurational element is excluded but means that the other configurational element can be further included, unless specifically described otherwise.

Terms used in this specification are only used to describe a specific embodiment and are not intentionally used to limit the invention thereto. A singular form of a word includes a plural meaning of the word, unless obviously implied otherwise in context. In this specification, words such as "to comprise" or "to have" are understood to specify that a feature, a number, a step, an operation, a configurational element, a member, or a combination thereof described in the specification is present and not to exclude presence or a possibility of addition of one or more other features, numbers, steps, operations, configurational elements, members, or combinations thereof in advance.

<FIG> is a flowchart illustrating a manufacturing method of a tire integrated electronic device according to an embodiment of the invention.

In the manufacturing method of a tire integrated electronic device, first, Step S10 of positioning an electronic device mockup portion inside a first mold unit and a second mold unit can be set to be fulfilled.

<FIG> is a flowchart illustrating a step of positioning the electronic device mockup portion according to the embodiment of the invention.

With further reference to <FIG>, in Step S10 of positioning the electronic device mockup portion inside the first mold unit and the second mold unit, first, step S11 of preparing the first mold unit and the second mold unit can be fulfilled.

The first mold unit and the second mold unit can be provided in a state of being divided into two parts in an up-down direction or in a right-left direction.

More specifically, the first mold unit includes a first mold body and a mold inlet.

The first mold body can form a body of the first mold unit.

The mold inlet is provided on an inner side of the first mold body and can be provided to allow unvulcanized rubber to be injected into an inside of the mold through the mold inlet.

The second mold unit forms a lower part of the mold and includes a second mold body and a mold groove.

The second mold body can form a body of the second mold unit and can be coupled to a lower part of the first mold body.

The mold groove is provided on an inner side of the second mold body and can be provided to accommodate the electronic device mockup portion <NUM> (refer to <FIG>) inside.

The specific shape of the mold groove can be provided as a shape of a rubber mount unit <NUM> (refer to <FIG>) which will be described.

After Step S11 of preparing the first mold unit and the second mold unit, Step S12 of positioning the electronic device mockup portion at an inner center of the first mold unit and the second mold unit can be fulfilled.

In Step S12 of positioning the electronic device mockup portion at the inner center of the first mold unit and the second mold unit, the electronic device mockup portion <NUM> can be provided to have an antenna portion located at a position corresponding to an antenna hole forming portion <NUM>.

Specifically, a position of an antenna portion of an electronic device unit <NUM> can be marked on the electronic device mockup portion <NUM>. The electronic device mockup portion <NUM> provided as described above can be provided to have the marked antenna portion located at a position corresponding to the antenna hole forming portion <NUM>.

The antenna hole forming portion <NUM> enables the position corresponding to the antenna portion not to be enclosed by the unvulcanized rubber which encloses the electronic device unit <NUM> such that an antenna hole <NUM> can be formed in the rubber mount unit <NUM>.

In addition, a guide portion can be attached to an upper part of the electronic device mockup portion <NUM>, the guide portion being provided to guide so that the electronic device mockup portion <NUM> is temporarily located at a center of the mold groove and to conveniently install the electronic device mockup portion <NUM> after vulcanization.

After Step S12 of positioning the electronic device mockup portion at the inner center of the first mold unit and the second mold unit, Step S13 of closing the first mold unit and the second mold unit can be fulfilled.

After Step S10 of positioning the electronic device mockup portion inside the first mold unit and the second mold unit, Step S20 of performing injection molding or compression molding by injecting unvulcanized rubber inside the first mold unit and the second mold unit such that the unvulcanized rubber encloses the electronic device mockup portion can be fulfilled.

<FIG> is a flowchart illustrating the step of performing injection molding or compression molding according to the embodiment of the invention. <FIG> is a perspective view illustrating the tire integrated electronic device in a state where the electronic device mockup portion according to the embodiment of the invention is mounted.

In addition, <FIG> is a side view illustrating the tire integrated electronic device in the state where the electronic device mockup portion according to the embodiment of the invention is mounted, and <FIG> is a perspective view illustrating the tire integrated electronic device according to the embodiment of the invention.

With further reference to <FIG>, in Step S20 of performing injection molding or compression molding by injecting the unvulcanized rubber inside the first mold unit and the second mold unit such that the unvulcanized rubber encloses the electronic device mockup portion, Step S21 of injecting the unvulcanized rubber inside the first mold unit and inside the second mold unit can be fulfilled.

In Step S21 of injecting the unvulcanized rubber inside the first mold unit and inside the second mold unit, the unvulcanized rubber can be injected through the mold inlet such that the unvulcanized rubber can fill an inside of the mold groove.

Here, the unvulcanized rubber can be made of any one of natural rubber, synthetic rubber, a mixture of natural rubber and synthetic rubber, or a polymer.

In Step S21 of injecting the unvulcanized rubber inside the first mold unit and inside the second mold unit, the unvulcanized rubber can fill insides of the first mold unit and the second mold unit to enclose the electronic device mockup portion <NUM>, but can be provided to enclose the electronic device mockup portion <NUM> except for the antenna hole forming portion <NUM> located at an upper part of the electronic device mockup portion <NUM> and a position corresponding to an insertion hole <NUM> located at a lower part of the electronic device mockup portion <NUM>.

In other words, the rubber mount unit <NUM> can be molded to have the insertion hole <NUM>, through which the electronic device unit <NUM> is to be inserted, at a lower part of the rubber mount unit.

After Step S21 of injecting the unvulcanized rubber inside the first mold unit and inside the second mold unit, Step S22 of maintaining a preset vulcanization temperature for a preset vulcanization time so as to induce a crosslinking reaction in the injected unvulcanized rubber can be fulfilled.

In Step S22 of maintaining the preset vulcanization temperature for the preset vulcanization time so as to induce the crosslinking reaction in the injected unvulcanized rubber, the vulcanization temperature can be set in a range of <NUM> to <NUM>, and the vulcanization time can be set in a range of one minute to <NUM> minutes.

The vulcanization time can be set until the unvulcanized rubber is completely vulcanized.

In Step S22 of maintaining the preset vulcanization temperature for the preset vulcanization time so as to induce the crosslinking reaction in the injected unvulcanized rubber, the rubber mount unit <NUM> formed through vulcanization can be formed to include a bottom body <NUM>, a side body <NUM>, the antenna hole <NUM>, and the insertion hole <NUM>.

The bottom body <NUM> can be formed to enclose a lower part of the electronic device unit <NUM> except for a portion of the insertion hole <NUM>, and the bottom body <NUM> can be molded to have an area which is equal to or larger than <NUM>% of a bottom area of the electronic device unit <NUM>.

The circular bottom body <NUM> is illustrated; however, the shape thereof is not limited thereto, and the bottom body can be formed into a polygonal shape.

The side body <NUM> can be formed to be extended upward from the bottom body <NUM> and can be formed to enclose a side surface of the electronic device unit <NUM>.

The antenna hole <NUM> can be provided on an inner side of an upper part of the side body <NUM>, and the antenna hole <NUM> enables an antenna and a pressure measuring portion of the electronic device unit <NUM> to be exposed to the outside such that sensing sensitivity is not degraded.

<FIG> is a perspective view illustrating the rubber mount unit according to the embodiment of the invention in a state of being vertically cut. <FIG> illustrates a photograph of an actual rubber mount unit according to the embodiment of the invention in a state of being vertically cut.

With further reference to <FIG> and <FIG>, the insertion hole <NUM> can be formed in the bottom body <NUM>.

Specifically, the insertion hole <NUM> can be formed to have a multi-step structure such that an air layer is formed between the electronic device unit <NUM> and the inner liner without a surface-to-surface contact between a bottom surface of the electronic device unit <NUM> and a surface of the inner liner.

Specifically, when the electronic device unit <NUM> is in contact with the surface of the inner liner of the tire, the electronic device unit <NUM> is finely moved due to inertia and vibration during running of a vehicle. Here, when long-time running is performed, the surface of the inner liner is damaged due to friction caused from movement of the electronic device unit <NUM>.

However, when a space is formed between the electronic device unit <NUM> and the inner liner by the insertion hole <NUM>, the friction is not generated, and thus the surface of the inner liner is not to be damaged by the electronic device unit <NUM>.

In particular, when the insertion hole <NUM> is formed between the surface of the inner liner and the electronic device unit <NUM> such that the air layer is formed therebetween, it is possible to achieve an effect that an impact transmitted from a tread is reduced by additionally passing through an air layer medium in addition to a solid medium between the tread and the inner liner.

Besides, the rubber mount unit <NUM> can be formed to have a bottom, that is, the bottom body <NUM> having a thickness of <NUM> to <NUM>.

When the bottom body <NUM> has a thickness of less than <NUM>, the electronic device unit <NUM> inserted into the insertion hole <NUM> and the surface of the inner liner can come into contact with each other due to vibration caused by running or the like, and thus the inner liner can be damaged.

In addition, when the bottom body <NUM> has a thickness of more than <NUM> or is too thick, a weight of a tire integrated electronic device <NUM> increases, an influence of inertia on the tire integrated electronic device increases, and thus the inner liner can be damaged.

Hence, it is desirable to limit the thickness of the bottom body <NUM> to <NUM>.

In addition, the insertion hole <NUM> can be formed to have an area as large as <NUM>% to <NUM>% of the bottom area of the electronic device unit <NUM> such that the above-described effects can be maximized.

In other words, the area of the bottom body <NUM> is to be equal to or larger than <NUM>% of the bottom area of the electronic device unit <NUM>, and the insertion hole <NUM> is to be formed to have the area as large as <NUM>% to <NUM>% of the bottom area such that the air layer for reducing an impact can be formed.

<FIG> illustrates photographs of an integrated electronic device without having the insertion hole according to the embodiment of the invention, the photographs being taken before and after an evaluation is performed.

As illustrated in (b) of <FIG>, when the electronic device <NUM> in the related art is evaluated after running, it is possible to see that one side of a rubber mount portion is pushed and swollen.

In addition, as illustrated in (c) of <FIG>, when a surface of the inner liner is checked after the electronic device <NUM> in the related art is removed, it is possible to see that the inner liner is damaged to the extent that a carcass cord can be seen.

As described above, since the electronic device <NUM> in the related art does not have the insertion hole <NUM> formed at a lower part of the electronic device unit <NUM>, the impact is not cushioned, and thus a problem arises in that the inner liner is damaged due to vibration.

However, according to the invention, since the insertion hole <NUM> is formed to form the air layer between the inner liner and the electronic device unit <NUM>, the impact is cushioned, and thus it is possible to inhibit the inner liner from being damaged.

In addition, according to the invention, since the insertion hole <NUM> inhibits heat of the inner liner from being directly transmitted to the electronic device unit <NUM>, and the air layer further increases a heat insulation effect, an effect of improving heat resistance of the electronic device unit <NUM> is achieved.

After Step S20 of performing injection molding or compression molding by injecting the unvulcanized rubber inside the first mold unit and the second mold unit such that the unvulcanized rubber encloses the electronic device mockup portion, Step S30 of unmolding the rubber mount unit molded to enclose the electronic device mockup portion can be fulfilled.

In Step S30 of unmolding the rubber mount unit molded to enclose the electronic device mockup portion, the electronic device mockup portion <NUM> can be unmolded from the rubber mount unit <NUM>.

<FIG> is a photograph illustrating the tire integrated electronic device according to the embodiment of the invention.

With reference to <FIG>, after Step S30 of unmolding the rubber mount unit molded to enclose the electronic device mockup portion, Step S40 of inserting the electronic device unit into a lower end portion of the unmolded rubber mount unit can be fulfilled.

In Step S40 of inserting the electronic device unit into the lower end portion of the unmolded rubber mount unit, the electronic device unit <NUM> can be inserted into the rubber mount unit <NUM> through the insertion hole <NUM>.

After Step S40 of inserting the electronic device unit into the lower end portion of the unmolded rubber mount unit, Step S50 of attaching the electronic device unit-inserted rubber mount unit to the inner liner of the tire can be fulfilled.

In Step S50 of attaching the electronic device unit-inserted rubber mount unit to the inner liner of the tire, the rubber mount unit <NUM> can be attached to the inner liner by an adhesive or glue.

Examples of the adhesive can include an instant adhesive, a silicone adhesive series, or a glue which exhibit <NUM>% attachment strength within <NUM> minutes after attachment.

<FIG> is a side view illustrating a rubber mount unit attached with Velcro according to the embodiment of the invention. <FIG> is a photograph illustrating the Velcro according to the embodiment of the invention.

With reference to <FIG> and <FIG>, in Step S50 of attaching the electronic device unit-inserted rubber mount unit to the inner liner of the tire, the rubber mount unit <NUM> can be attached to the inner liner by the Velcro.

Specifically, in Step S50 of attaching the electronic device unit-inserted rubber mount unit to the inner liner of the tire, first, first Velcro <NUM> can be provided to be coupled to a lower part of the rubber mount unit <NUM>. Then, second Velcro <NUM> which can be attached to the first Velcro <NUM> of the rubber mount unit <NUM> can be coupled to an inner side of the inner liner.

Next, the rubber mount unit <NUM> can be attached to the inner liner by using the first Velcro <NUM> and the second Velcro <NUM>.

On the other hand, the rubber mount unit <NUM> can be fastened to the inner liner by using a hook.

The invention provided as described above can avoid the problem of causing the inner liner to be damaged by the electronic device unit <NUM> since the electronic device unit <NUM> is attached in a state of being separated from the surface of the inner liner and the insertion hole <NUM> is formed such that the air layer is formed between the inner liner and the electronic device unit <NUM>.

In addition, it is possible to avoid a problem of causing the electronic device unit <NUM> to be detached from the rubber mount unit <NUM> and damage a tire.

In addition, since the electronic device unit <NUM> is integrated with the rubber mount unit <NUM>, it is possible to perform history management by tracking a tire, as long as the rubber mount unit <NUM> is not detached from the inner liner by artificial means after primary attachment.

In addition, it is possible to avoid a problem of detachment of the electronic device unit <NUM> due to incorrect installation of the electronic device unit <NUM>.

In addition, since the electronic device unit <NUM> measures acceleration, and the acceleration has directionality, it is difficult to transmit an accurate value, when a direction of the electronic device unit <NUM> is incorrect. However, when the electronic device unit <NUM> is integrated with the rubber mount unit <NUM>, it is possible to avoid a problem of incorrect measurement of information such as acceleration due to a change in direction of the electronic device unit <NUM>.

The invention according to the configuration described above has the following effects. Since the electronic device unit is attached in a state of being separated from the surface of the inner liner and the insertion hole is formed such that air layer is formed between the inner liner and the electronic device unit, it is possible to avoid a problem of causing the electronic device unit to damage the inner liner.

It is possible to avoid a problem of causing the electronic device unit to be detached from the rubber mount unit and damage a tire.

In addition, since the electronic device unit is integrated with the rubber mount unit, it is possible to perform history management by tracking a tire, as long as the rubber mount unit is not detached by artificial means after primary attachment.

In addition, it is possible to avoid a problem of detachment of an electronic device unit due to incorrect installation of the electronic device unit.

In addition, since the electronic device unit measures acceleration, and the acceleration has directionality, it is difficult to transmit an accurate value, when a direction is incorrect. However, when the electronic device unit is integrated with the rubber mount unit, it is possible to avoid a problem of incorrect measurement due to a change in direction of the electronic device unit.

In addition, it is possible to perform molding regardless of a shape of an electronic device.

Effects of the invention are construed not to be limited to the above-mentioned effects but to include every effect that can be derived from configurations of the invention described in the detailed description of the preferred embodiments and claims of the invention.

Claim 1:
A manufacturing method of a tire integrated electronic device, comprising:
a) step (S10) of positioning an electronic device mockup portion (<NUM>) inside a first mold unit and a second mold unit;
b) step (S20) of performing injection molding or compression molding by injecting unvulcanized rubber inside the first mold unit and the second mold unit such that the unvulcanized rubber encloses the electronic device mockup portion (<NUM>);
c) step (S30) of unmolding a rubber mount unit (<NUM>) molded to enclose the electronic device mockup portion (<NUM>);
d) step (S40) of inserting an electronic device unit (<NUM>) into a lower end portion of the unmolded rubber mount unit (<NUM>); and
e) step (S50) of attaching the electronic device unit-inserted rubber mount unit to an inner liner of a tire,
wherein the rubber mount unit (<NUM>) is molded to have a bottom body (<NUM>) and an insertion hole (<NUM>) at a lower portion of the rubber mount unit (<NUM>) in the bottom body (<NUM>) of the rubber mount unit (<NUM>), through which the electronic device unit (<NUM>) is to be inserted into the lower end portion of the rubber mount unit (<NUM>);
wherein the b) step (S20) includes:
b1) step (S21) of injecting the unvulcanized rubber inside the first mold unit and inside the second mold unit; and
b2) step (S22) of maintaining a preset vulcanization temperature for a preset vulcanization time so as to induce a crosslinking reaction in the injected unvulcanized rubber;
wherein, in the c) (S30) step, the electronic device mockup portion (<NUM>) is unmolded from the rubber mount unit (<NUM>) .