JP2000006187A - Resin molding with pushbutton and method for molding it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To integrally mold a resin molding of a constitution in which a pushbutton is disposed on a molding body. SOLUTION: A previously molded (molding) pushbutton B1 is inserted into a mold M for molding. In this state, a body molding space 26 for molding an upper case (molding body) and a variable thin part molding space for molding variable thin parts are formed in the mold M of upper and lower molds M1, M2 and slide molds S1, S2 for constituting the mold M. In this state, a molten resin as a secondary raw material is injected in a cavity of the pushbutton B1 from a gate 36 of the mold communicating with a gate communicating hole of the pushbutton B1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin molded product in which a push button is integrally molded with a molded product main body, and a molding method therefor.

[0002]

2. Description of the Related Art There are various methods for molding a resin molded article having a push button. For example, the molding method shown in FIG. 18 uses a mold that can be separated in the vertical direction, sets a pre-formed push button B ′ inside its upper mold M ′ ₁ ,
Substrate molding space 6 formed between upper and lower molds M ′ ₁ , M ′ ₂
1, the same thin portion forming space 62 and the push button B ′
In the cavity 63 of the one in which is molded by injecting and filling a molten resin from a gate 64 provided on the lower mold M _'2. However, in the case of this molding method, since the gate 64 is provided at a position distant from the set position of each push button B ′, the resin injected into the hollow portion 63 and the thin portion molding space 62 respectively. There is a considerable difference in wall thickness, and sink and molding failure are likely to occur due to heat balance. Further, when the injection pressure of the resin is increased in order to eliminate sink marks and molding defects, burrs are likely to occur.

In order to avoid the above-mentioned problems, Japanese Patent Application Laid-Open
The molding method shown in FIG. 19 disclosed in Japanese Unexamined Patent Publication No. 3-92428 may be adopted. In this molding method, a gate 66 is provided at the center of a thick push button molding space 65. The molded article shown in FIG. 19 can be molded even if the gate 66 is provided in the above-mentioned portion. However, in the case where the shape of the molded product is as shown in FIG. 6 which is a drawing according to the present invention, a molding die is used to form an annular thin portion connecting the molded product main body (substrate) and the push button. In some cases, it is indispensable to use a slide type that can be moved in a direction perpendicular to the separation direction. In this case, interference may occur between the slide die and the gate for forming the thin portion, and the structure of the die may be significantly complicated, or the gate may not be provided due to space.

[0004] For this reason, if a molded article is divided into two parts, one having a push button and the other part having no push button, and molded separately, and these are joined together, a conventional structure can be formed without using a slide die. It can be molded by the mold, but the point where the joining process of the two-piece body is indispensable, and the joint appears in the appearance,
A new drawback is that the design is reduced.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to make it possible to integrally mold a resin molded product having a push button.

[0006]

SUMMARY OF THE INVENTION The present invention for solving the above-mentioned problem is a method for integrally molding a push button with a molded article main body. A step of pre-forming a separate push button having a gate communication hole communicating with the gate; a step of inserting the pre-formed separate push button into a body molding space of a molding die; After the insert,
From the gate communication hole of the push button, the step of injecting the molten resin as the secondary material injected into the cavity through the variable thin portion molding space of the molding die into the main body molding space, It is characterized in that a push button and a molded product main body which is secondarily formed in a main body forming space of a molding die are integrally formed through a variable thin portion which is secondarily formed in the variable thin portion forming space. .

In a state where a preformed (primary molding) push button is inserted into a molding die, a main body molding space for molding a molded product main body is provided in each of the upper and lower dies constituting the molding die, and a variable thin wall is provided. A variable thin portion forming space for forming the portion is formed. In this state, when the molten resin as the secondary material is injected into the cavity of the push button from the gate of the molding die communicating with the gate communication hole of the push button, the molten resin is formed into the cavity of the push button and the body molding. The main body molding space is injected and filled through the variable thin portion molding space connecting the space. Then, after the molten resin is injected and filled in the main body molding space, the molten resin is injected and filled in the variable thin portion molding space, and finally, the molten resin is injected and filled in the cavity of the push button. As described above, the narrow molding space for molding the variable thin portion is filled with the resin having good meltability immediately after the injection, so that the variable thin portion to be molded has burrs and the like. And has good variability.

[0008] Here, the push button is formed in advance, and the cavity is filled with a molten resin which is a secondary raw material for molding the molded article main body. When the compatibility between the raw material (primary raw material) and the secondary raw material injected and filled in the cavity is poor, the push button may come off the molded product body. Therefore,
By providing a retaining hole communicating with the cavity on the peripheral surface of the push button, and filling the retaining hole with a resin as a secondary material, the bonding force between the molded article main body and the push button can be increased. Can be.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail with reference to a plurality of embodiments. Figure 1 is a perspective view of the upper case C ₁ dated pushbutton molded from below by the method according to the present invention, FIG 2 is a first perspective view of a pushbutton B _1, 3 FIG. 4 is a perspective view of a second push button B ₂ , FIG. 4 is a plan view of a lower mold M ₂ constituting a molding die M, and FIG. 5 is a view of a lower mold M ₂ separated from an upper mold M _1. is a vertical sectional view of a state in which the first and second respective pushbuttons B _1, the B ₂ inserted, FIG. 6, the lower die first and second respective pushbuttons B _1, B ₂ was inserted M is a vertical sectional view of a state where the set upper mold M _{1 2} and, Figure 7 is an enlarged view of a portion indicated by "a" in FIG. 6, FIG. 8, each type of vertical after molding M FIG. 9 is a cross-sectional view of a state where M ₁ and M ₂ are separated.
Is a longitudinal sectional view cut away first portion of the pushbutton B ₁ of the upper case C _1, 10 is a partial longitudinal sectional view broken a second portion of the push button B ₂ of the upper case C ₁ . In the present embodiment, as shown in FIG. 13, the present invention is applied to molding of a case C with a push button of a remote operation unit U which is installed in a holder portion H of a vehicle key K which can be remotely operated. is there.

In this remote control unit U, as shown in FIG. 11, first and second push buttons B ₁ and B ₂ are integrally formed on the sides, and a control board V (see FIG. 12) is formed. an upper case C ₁ to be accommodated, a button battery (not shown) the lower case C ₂ and is assembled vertically integrally is housed, a configuration in which a case-like. When the remote control unit U is mounted in the holder H of the vehicle key K, the first and second push buttons B ₁ and B ₂ protrude to the side of the holder H. Therefore, by pressing the first and second push buttons B ₁ and B ₂ protruding from the holder portion H, the door can be automatically locked and unlocked, and the trunk can be opened and closed by remote control.

Next, the first and second push buttons B ₁ , B ₂
For mold M for molding the upper case C ₁ with be described. 4 to FIG.
Are the upper mold M ₁ and the first and second slide molds S ₁ , S ₂
It is composed of a lower mold M ₂ provided. The lower mold M _2,
Insert holes 11 and 12 into which the lower halves of the first and second push buttons B ₁ and B ₂ are respectively inserted are provided,
The upper mold M _1, the insert hole the upper half of each pushbutton of the first and 2 B _1, B ₂ are inserted respectively 13, 1
4 (refer to FIG. 10 for the symbol “14”). Also, the lower mold M _2, the first and for forming a variable thin part 7 to integrate the first and second respective pushbuttons B _1, B ₂ of the separate with respect to the upper casing C ₁ second 2 is a direction Q in which the respective slide dies S ₁ and S ₂ are orthogonal to the separation direction P of the molding die M.
Is slidably provided.

In FIGS. 6 and 7, the first slide die S ₁ is provided with a thin-walled molding portion 16 having a conical-surface-shaped thin-wall molding surface 15. ₁ , M
Thin portion molding surface 15 of the first slide-type S ₁ in ₂
Are provided with thin-walled molded portions 18a and 18b having conical-shaped thin-wall molded surfaces 17a and 17b, respectively. Then, the upper and lower dies M ₁ and M _{2 of} the molding die M,
In a state where the first slide-type S ₁ is closed, the first slide-type S thin portion molding surface 15 of _1, and below each mold M _1, M ₂
Molding space of the thin portion molding surface 17a, a space formed by the 17b, the variable thin part 7 for integrally combining the first push button B ₁ separate with respect to the upper case C ₁ (see FIG. 9) It becomes 19. Although not shown, the molding space of the variable thin portion 7 ′ (see FIG. 10) for integrating the separate second push button B ₂ with the upper case C ₁ is also provided. The mold structure is almost the same as the molding space 19.

[0013] With respect to the upper mold M ₁ of the mold M, the molding recess 21 for molding a upper case C ₁ (see FIG. 5) is provided on the side of the insert hole 13, 14. Also, the lower mold M ₂ of the mold M, for each of the first and second slide-type S _1, S ₂ is provided, the mold portion 22 of the lower mold M ₂ is at its main body portion 23 On the other hand, it has a separate structure, and can be separated in the same direction as the separation direction P of the molding die M, and can be fitted into the fitting hole 20 provided vertically penetrating through the main body 23. ing. At the time of molding, as shown in FIG. 6, the molding recess 21 of the upper mold M ₁
In, and the mold portion 22 of the lower mold M _2, wherein each of the first and second slide-type S ₁ of each mold section 24, 25 (see FIGS. 4 and 6) of S ₂ and is penetrated, these The space formed by this is the main body molding space 26 (see FIG. 6).

The first slide die S ₁ comprises the molding die 24, a slide drive 27, and a connecting portion 28 connecting the two, and the slide drive 27 is
Is slidably accommodated in the accommodating hole 29 provided in an opening on the upper surface of the lower mold M _2, the slide pins 31 provided inclined upper mold M ₁ is, the slide drive portion of the first slide-type S ₁ 27 Is fitted to the slide hole 32 provided at an angle. Therefore, as shown in FIG. 5, in a state where the upper and lower dies M ₁ and M ₂ of the molding die M are separated, the upper die M ₁ is close to the lower die M _{2 and 1} of the slide pin 31 is first slide S ₁ slide hole 3
After fitted in 2, 'in accordance with the move to the first slide-type S _1, the direction Q perpendicular thereto' direction P in which the upper die M ₁ is close to the lower mold M ₂ is slid on. Conversely, in a state where the upper mold M ₁ are integrated to the lower mold M _2, as shown in FIG. 8, the upper mold M ₁ is moved in the separating direction P, the first slide-type S ₁ is Are slid in a direction Q orthogonal to the separating direction P. Also, with respect to the second slide S _2, similarly to the first slide-type S _1, in accordance with the approach and separation with respect to the lower mold M ₂ of the upper mold M _1, it is slid. In FIG. 4, 33,
34 and 35, respectively slide drive portion of the second sliding type S _2, connecting portion, and the receiving hole.

In the molding method of the present invention, the first
And when forming on the casing C ₁ with a second ₁ each pushbutton B, B _2, each pushbutton B _1, B ₂ preformed (primary molding) was leave, the respective pushbutton B _1, B ₂ Is inserted into the respective insert holes 11 to 14 of the mold M. As shown in FIGS. 2 and 7, the first push button B ₁ has a cavity 1 formed therein with one side surface opened, and a portion close to the opening side of the peripheral wall 2. A gate communication hole 3 communicating with the gate 36 of the upper mold M ₁ is provided through the cavity 1, and a retaining hole 4 communicates with the cavity 1 at a portion facing the gate communication hole 3. And a center rod 6 at the center of the side wall 5.
Are provided so as to slightly protrude from the side opening. The inside diameter of the gate communication hole 3 is 0.2 to 2 mm. The basic structure of the second push button B _{2 is} also substantially the same except for the overall shape thereof. In FIGS. 3 and 10, the same reference numerals are used for the portions equivalent to the first push button B _1. It is displayed with "'" attached.

Next, a case where the upper case C ₁ having the first and second push buttons B ₁ and B ₂ projecting sideways is formed by using the above-mentioned forming die M will be described. First of the above configuration
The second push buttons B ₁ and B ₂ are molded (primary molding) in advance. Next, as shown in FIG. 5, the lower mold M ₂
First and second insert holes 11 and 12, respectively.
Each pushbutton B _1, by inserting the lower half of the B _2, previously set to the lower mold each pushbutton of the first and second relative M ₂ B _1, B ₂ of. In this state, the first and second slide dies S ₁ and S ₂ have their thin-walled molded portions 16 retreated with respect to the set first and second push buttons B ₁ and B ₂ . It is in a state where it has been done.

[0017] Then, lowers the upper mold M ₁ relative to the lower mold M _2, two provided on the upper mold M ₁ slide pin 31
However, after being fitted into the slide holes 32 of the first and second slide dies S ₁ and S ₂ , the upper mold M ₁ moves in the direction P ′ approaching the lower mold M ₂ . in response, the first slide-type S ₁ is slid in the direction Q 'perpendicular thereto, the thin-wall section 16, pre-set by which each of the first and second pushbuttons B _1, B ₂ Close to the side. Thereafter, the mold portion 22 which is separated from the main body portion 23 of the lower mold M _2, when fitted into the fitting hole 20 of the body portion 23, as shown in FIG. 6, the lower mold M Mold part 22 of ₂
And the respective forming mold parts 24 and 25 of the first and second slide dies S ₁ and S ₂ enter into the forming recess 21 of the upper mold M ₁ , and a main body forming space is provided therebetween. 26 are formed.

As shown in FIG. 7 in an enlarged manner, a conical thin portion provided on the distal end surface of the thin formed portion 16 of each of the first and second slide dies S ₁ and S _2. Molding surface 15
A molding space 19 for molding the variable thin portion 7 is formed between the thin molding portions 17a and 17b provided in the thin molding portions 18a and 18b of the molding die M. In this manner, in the state where the upper mold M ₁ is set to the lower mold M _2, each pushbutton of the first and 2 B _1, B ₂
And the main body forming space 26 formed by the two dies M ₁ and M ₂ are connected via the respective forming spaces 19 of the variable thin portions 7 and 7 ′ formed in an annular shape. ing. Further, each of the first and second pushbuttons B ₁ of, B ₂ of the gate passage 3, 3 ', gates 36, 36 of the molten resin provided in the upper mold M _1' communicates with.

As described above, when the upper and lower molds M ₁ and M ₂ are set, they communicate with the gate communication holes 3 and 3 ′ of the first and second push buttons B ₁ and B _2. 'from the molten resin is a secondary raw material the pushbutton B _1, B ₂ of the cavity 1, 1' gates 36, 36 of the upper mold M ₁ when injection respectively, the molten resin, each pushbutton B _1, the cavity 1 of the B _2,
The main body molding space 26 is injected and filled through the molding spaces 19, 19 of the annular variable thin portions 7, 7 'connecting the 1' and the main body molding space 26. After the molten resin in the main body molding space 26 is injected and filled, respectively molten resin is filled in the molding space 19 of the variable thin portions 7, 7 ', and finally, of the pushbutton B _1, B ₂ The hollow portions 1, 1 'are filled with the molten resin. Each variable thin part 7,
Narrow molding space 19 for molding the 7 ', the upper mold M ₁
Are welded near the gates 36, 36 'of the above, and are injected and filled with a resin having high fusibility immediately after injection, so that welds, burrs, etc. are generated in the molded variable thin portions 7, 7'. Without variability.

Further, the retaining holes 4 for the push buttons B ₁ and B ₂ are provided.
4 'is filled with a molten resin as a secondary raw material, so that the integration between the primary molded portion and the secondary molded portion is enhanced, and each push button B _{1 with} respect to the molded article main body (upper case C ₁ ). ,
Bonding force B ₂ is enhanced. For this reason, it is particularly effective when the compatibility of the resin between the primary molded part and the secondary molded part is poor.

[0021] Then, the upper after curing of the resin, as shown in FIG. 8, After separation of the mold part 22 downward relative to the body portion 23 of the lower mold M _2, with respect to the lower mold M ₂ Type M
_By moving ₁ in the direction of arrow P to separate them,
Along with this, the first and second slide dies S ₁ and S ₂ slide in the direction of arrow Q, and the molded product can be taken out from the lower die M ₂ .

The hollow portions 1, 1 'of the first and second push buttons B ₁ , B ₂ are filled with a resin, so that a hollow filling resin portion 8,
8 ', and the case C ₁ on a molded article, the variable thin portions 7 of the annular' are integrally molded with the cavity filling resin portion 8, 8 'through the. As a result, the first and second push buttons B ₁ and B ₂ formed in advance (primary molding) are formed on the side of the upper case C ₁ which is a molded product by the annular variable thin portions 7,
They are joined together via 7 '. Then, the upper and casing C _1, when interior control board V to configured push button with the case C in the lower case C _2, which is another molded as shown in Figure 11, the remote control unit U . In this remote control unit U, as shown in FIG. 12, when the push buttons B ₁ and B ₂ protruding to the side of the case C are pushed, the annular variable thin portions 7, 7 ′ are bent, and the push buttons B ₁ and B ₂ are bent. Button B ₁ ,
B 'pressing portion 9, 9 that is shaped to cover the' core rod 6, 6 in the _2, the switch unit 41 of the control board V by pressing displacement control board V is activated. Incidentally, in the above-described embodiment, each of the first and second push-button B _1, the gate communicating provided B ₂ holes of 3, 3 ', in order provided on the peripheral surface thereof, said gate passage 3 , 3 ′ function as retaining holes after being filled with the molten resin and cured. Therefore, in the above embodiment, for each pushbutton B _1, B _2, so that one by one the total of two of the retaining holes are provided respectively at portions opposing each pushbutton B _1,
Bonding force between the primary molding section and a secondary molding portion of the B ₂ is further enhanced.

As described above, in the molding method of the present invention, the first and second push buttons B ₁ and B ₂ are molded (primary molding) in advance, and the remaining part is formed by secondary molding. You. Here, as the primary raw material resin of the push button to be primarily molded, ABS, nylon, polycarbonate, PB
T, polypropylene and the like having high mechanical strength and good moldability can be given. Also, as a secondary raw material resin for secondary molding of parts other than the push button, nylon elastomer, polyurethane-based elastomer, olefin-based elastomer, polyester elastomer, and the like,
Preferably, JIS A hardness of 35 to 70 degrees can be used.

In the above-described embodiment, the bonding force between the primary molding portion and the secondary molding portion constituting the push button is formed by filling the retaining hole provided in the push button with the molten resin as the secondary material. However, if space design of the cavity of the push button is allowed, the shape of this cavity is tapered so that it narrows toward the opening surface, and the shape of the cavity filling resin part is under Even in the case of the cut shape, the bonding force between the primary molded portion and the secondary molded portion of the push button can be increased.

Further, the above embodiment is directed to a case where a resin molded product having a relatively flat molded product body and a push button protruding on a side thereof is molded using a slide mold. Although this is an example in which the present invention is applied, the present invention relates to FIGS.
5 is as shown, be one variable thin portion 51 a plurality of push button B ₃ through which the annular upper case C _'1 surface with a relatively flat structure provided, like this It can also be performed on the upper case C _'1 of the molding. That is,
As shown in FIG. 16, a gate communicating hole 52 is provided on the upper surface, and sets a plurality of push button B ₃ that retaining hole 58 provided in the upper mold M _'1 in the circumferential wall Contact stomach, and close each type M _'1, M' ₂ of up and down, both types M _'1, M' ₂
In between, a main body forming space 53 and a thin portion forming space 54 are formed. Then, the gate 55 of the upper mold M _'1 connecting to the gate communicating hole 52 of the push button B _3, when injecting and filling the molten secondary raw material resin in the cavity 56 of the push button B _3, the thin portion molding space 54 To the main body molding space 53,
The secondary molding is molded in the same manner as in the above embodiment. Further, in the resin is filled into the retaining hole 58 of the push button B _3, a push button B _3, binding strength between the secondary molding portions filled in the cavity is increased.

Furthermore, the molding method shown in FIG. 17, in the molding of the upper case C _'1, the gate communicating with the peripheral wall surface hole 5
7 is an example of using the pushbutton B _'3 provided. In this pushbutton B _'3, the gate communicating hole 5 in its circumferential wall
Since 7 is provided, the gate communicating hole 57 also serve as a retaining hole, simply providing only one gate communicating hole 57, after the molding, a primary molded portion of the push button B _'3 two There is an advantage that the bonding force with the next molded part is increased. In FIG. 17, reference numeral 59 denotes a gate communicating with the gate communication hole 57.

In each of the above embodiments, one push button is provided with one gate communication hole and one stop hole, and one push button is provided on the peripheral wall surface with one gate which also serves as the stop hole. Although this is an example in which communication holes are provided, it is also possible to provide a plurality of gate communication holes or retaining holes in one push button.

[0028]

According to the resin molded product of the present invention, the cavity-filled resin portion and the molded product main body which are secondarily molded in the cavity through the gate communication hole provided in the pre-formed push button are variable. Because it is integrally molded through the thin part,
The push button can be integrally molded with the molded product body.

The method for molding a resin molded product according to the present invention is characterized in that, in a state where a preformed (primary molded) push button is inserted into the molding die, the molded product main body is placed in each of the upper and lower dies constituting the molding die. Forming a main body molding space for molding the same and a variable thin portion molding space for molding the variable thin portion, and in this state, the gate of the molding die communicating with the gate communication hole of the push button is moved from the gate of the push button to the push button. Since the molten resin as the secondary raw material is injected into the hollow portion, it is possible to integrally mold a resin molded product having a configuration in which a push button is arranged on the molded product main body.

That is, the molten resin injected from the gate of the molding die is injected and filled into the main body molding space through the variable thin portion molding space connecting the cavity of the push button and the main body molding space. After the molding space is injected with the molten resin, the variable thin portion molding space is injected with the molten resin, and finally, the cavity of the push button is injected with the molten resin. Therefore, the molded product main body molded by filling the main body molding space with the molten resin, and the push button are integrally connected via the variable thin portion, and in a narrow molding space for molding the variable thin portion. Since the resin having good meltability immediately after injection is injected and filled, the molded variable thin portion has good variability without generating burrs or the like.

Further, according to the molding method of the present invention, the push button is provided on the side of the molded article main body, and when the slide die is not used, the push button and the molded article main body are connected. Even when the thin portion cannot be molded, such a resin molded product can be integrally molded.

Further, a retaining hole communicating with its own cavity is provided on the peripheral surface of the push button, and when the secondary material resin is filled in the retaining hole during molding, a primary molding portion constituting the push button is formed. The bonding force with the secondary molding is increased. In particular, when a gate communication hole is provided on the peripheral surface of the push button, there is an advantage that the gate communication hole also has a function as a retaining hole.

[Brief description of the drawings]

1 is a perspective view of the upper case C ₁ dated pushbutton molded from below by the method according to the present invention.

2 is a first perspective view of a pushbutton B _1.

3 is a perspective view of a second push button B _2.

4 is a plan view of the lower mold M ₂ constituting the mold M.

FIG. 5 shows a _first mold and a _second mold in a lower mold M2 separated from an upper mold M1.
FIG. 4 is a longitudinal sectional view showing a state where the push buttons B ₁ and B ₂ are inserted.

FIG. 6 is a longitudinal sectional view showing a state in which a lower mold M2 and an upper mold M1 in which _first and _second push buttons B ₁ and B ₂ are inserted are set.

FIG. 7 is an enlarged view of a portion indicated by “A” in FIG. 6;

FIG. 8 is a sectional view showing a state in which upper and lower dies M ₁ and M ₂ are separated after molding.

9 is a longitudinal sectional view cut away first portion of the pushbutton B ₁ of the upper case C _1.

10 is a partial longitudinal sectional view broken a second portion of the push button B ₂ of the upper case C _1.

FIG. 11 is a perspective view of a remote operation unit U having a case C with a push button.

12 is an enlarged longitudinal sectional view of a second push button B ₂ parts of a remote control unit U.

FIG. 13 is a perspective view of a vehicle key K in which first and second push buttons B ₁ and B ₂ protrude from a side of a holder portion H;

14 is a perspective view of an upper case C _'1 dated pushbutton molded by the method according to the present invention.

FIG. 15 is a sectional view taken along line XX of FIG. 14;

16 is a cross-sectional view of a shaped portion of the upper case C _'1 dated pushbutton.

17 is a cross-sectional view of _a mold portion 'case C on having a _3' gate communicating hole 57 is pushbutton B provided on the peripheral wall surface.

FIG. 18 is a cross-sectional view showing a conventional molding method of a resin molded product having a push button.

FIG. 19 is a cross-sectional view showing another conventional molding method of a resin molded product having a push button.

[Explanation of symbols]

B ₁ : First push button B ₂ : Second push button B ₃ : Push button C: Case with push button C ₁ , C ' ₁ : Upper case (molded product body) M: Mold M ₁ , M' ₁ : Upper mold M ₂ , M ′ ₂ : Lower mold 1, 1 ′, 56: Cavity 3, 3 ′, 52, 57: Gate communication hole 4, 4 ′, 58: Lock hole 7, 7 ′, 51: Variable thin wall Part 8, 8 ': cavity filling resin part 19, 54: molding space of variable thin part 26, 53: body molding space 36, 36', 55, 59: gate

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4F202 AA03 AA29 AA42 AA45 AD05 AD24 AG21 AH33 CA11 CB01 CB12 CK06 CK54 4F206 AA03 AA29 AA42 AA45 AD05 AD24 AG21 AH33 JA07 JB12 JF05 JQ81 5G023 AA12 CA08 CA50

Claims (7)

[Claims] 1. A resin molded product in which a push button is integrally molded with a molded product body, and a cavity is formed in a cavity portion thereof through a gate communication hole provided in a preformed push button. A resin molded product having a push button, wherein the resin portion and the molded product main body are integrally formed via a variable thin portion. 2. The push button is provided with a retaining hole communicating with a cavity of the push button on a peripheral surface thereof.
A resin molded article having the push button according to 1. 3. A gate communication hole of the push button is provided on a peripheral surface thereof, and is provided on the peripheral surface and has a function of a retaining hole communicating with the cavity. A resin molded article having the push button according to claim 1. 4. The resin molded product having a push button according to claim 1, wherein the push button is provided on a side of the molded product main body. 5. A method for integrally molding a push button with a molded article main body, wherein the separate push button communicates with an internal cavity and has a gate communication hole with a gate when setting a molding die. A step of pre-forming the button, a step of inserting the separate pre-formed push button into the main body molding space of the molding die, and after the insertion of the push button, from the gate communication hole of the push button to the cavity thereof. A step of injecting the molten resin, which is the secondary raw material injected into the part, into the main body molding space through the variable thin part molding space of the molding die, and into the preformed push button and the main body molding space of the molding die. A method of molding a resin molded article having a push button, wherein a molded secondary molded article body is integrally molded through a variable thin portion formed in the variable thin portion molding space. 6. The method for molding a resin molded article having a push button according to claim 5, wherein in the inserting step, a push button is inserted into a side of the molding space of the molding die. 7. A push-button is provided on the peripheral surface thereof with a retaining hole communicating with the cavity, and when the molten resin as a secondary material is injected, the cavity and the retaining hole are filled with the molten resin. A method for molding a resin molded article having the push button according to claim 5.