JP3764418B2 - Mold - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a molding die for producing a molded product comprising a molded product main body and an outer frame portion integrated around the molded product main body.
[0002]
[Prior art]
Conventionally, when manufacturing a molded product in which the outer frame part made of a synthetic resin different from the molded product main body is integrated on the outer periphery of the molded product main body, the molded product main body is molded with one intermediate mold. To do.
[0003]
And after arranging this molded product main body separately in the prepared final molding die, supplying a synthetic resin of a different type from the synthetic resin constituting the molded product main body in this final molding die, A molded product is manufactured by integrating an outer frame portion made of a synthetic resin different from the synthetic resin constituting the molded product main body on the outer periphery of the molded product main body.
[0004]
However, as described above, first, the molded product main body is molded using the intermediate molding die, and then the molded product main body is disposed in a final molding die different from the intermediate molding die, There is a problem that the two steps of integrating the outer frame portion need to be performed separately with time, and the manufacturing process is complicated.
[0005]
[Problems to be solved by the invention]
The present invention provides a molding die capable of efficiently producing a molded product obtained by integrating an outer frame portion made of a synthetic resin different from the molded product main body on the outer periphery of the molded product main body.
[0006]
[Means for Solving the Problems]
The molding die according to claim 1 is configured such that a first moving die and a second moving die are opposed to a pair of fixed dies arranged side by side at a predetermined interval, and the first, a second moving mold configured to form a cavity by bonding alternately to the pair of the stationary mold, the first, both the second movable die, and the same size of particles surface with the same shape In addition, a part of the particle surface is formed on the movable particle surface part, and one fixed mold in the pair of fixed molds is joined to the one fixed mold with the movable particle surface part retracted. An intermediate cavity capable of molding a molded product main body integrally formed with a projecting piece portion on the outer peripheral surface by the first or second moving mold, while the other fixed mold, The movable particle surface part is the intermediate cavity A final cavity that can accommodate the molded product main body is formed by the first or second moving mold that is joined to the other fixed mold in a state where the molded product is advanced than when formed, and the molded product main body is used as the final cavity. In the molding die configured to receive the molded product main body on the particle surface of the other fixed mold when moved in, the one fixed mold in the pair of fixed molds has the above-mentioned molded product main body. A main body forming recess for forming a part is formed, and a protrusion for forming the protruding piece portion continuously on the opening edge of the main body forming recess over the entire main forming recess. A concave part for forming a single part is formed, and a convex part for forming a through hole is formed in the concave part for forming a convex piece part, and one fixed mold and a first or second movable mold in a pair of fixed molds When bonded, the through hole forming projection is moved to the moving mold. Characterized in that it constitutes so as to catch the particle surface.
[0007]
[Action]
The point which manufactures a molded article using the molding die of this invention is demonstrated. First, an intermediate cavity is formed by joining a first moving mold with a movable particle surface retracted to one fixed mold of a pair of fixed molds, and a movable particle surface is formed on the other fixed mold. Are joined to the second moving mold in a state of being advanced more than when the intermediate cavity is formed. In this final cavity, the molded product main body formed in the intermediate cavity in the previous step and having the protruding piece part integrally formed on the outer peripheral surface is received by the particle surface of the other fixed mold. It is stored in a state.
[0008]
After that, the synthetic resin is supplied into the intermediate cavity to form the molded product main body, and the synthetic resin different from the synthetic resin constituting the molded product main body is supplied into the final cavity, A molded product is formed by integrating the outer frame portion on the outer periphery with the projecting piece portion mainly composed of the molded product embedded in the outer frame portion.
[0009]
Then, after opening the intermediate cavity and the final cavity and taking out the molded product from the final cavity, the first and second movable molds are moved with respect to the pair of fixed molds, and the molded product main body is moved to the particle surface. The first moving mold in a state of being attached to the other fixed mold is opposed to the other fixed mold, and the second moving mold is opposed to the one fixed mold.
[0010]
At the same time or thereafter, the movable particle surface portion of the second moving mold is retracted to the position where the intermediate cavity is formed, while the movable particle surface portion of the first moving mold is advanced to the position where the final cavity is formed.
[0011]
After that, the second moving mold is joined to one fixed mold to form an intermediate cavity, and the first moving mold is joined to the other fixed mold to form the final cavity. In this manner, the main part of the molded product is molded in the intermediate cavity, and the molded product is molded in the final cavity. Thus, according to the molding die of the present invention, a molded product can be efficiently produced by repeating the above procedure.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
An example of the molding die of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 9, the molding die A has a pair of fixed dies 1a and 1b arranged in parallel at a predetermined interval, and faces the fixed dies 1a and 1b and The first moving mold 2a and the second moving mold 2b are formed of the first moving mold 2a and the second moving mold 2b that can take the particle surfaces 21a and 21b having the same shape and the same size. The fixed molds 1a and 1b correspond to both the fixed molds 1a and 1b, and the intermediate cavity 3 and the final cavity 4 can be formed by the fixed molds 1a and 1b.
[0013]
One fixed mold 1a of the pair of fixed molds 1a and 1b has an end surface (surface facing the first and second movable molds 2a and 2b) as shown in FIGS. A main molding concave portion 11a having a desired shape for molding a part of the molded product main body 51 is provided in the inner bottom surface of the main molding concave portion 11a. A pattern forming projection 111a for projecting a pattern is provided.
[0014]
Further, an annular projecting piece forming recess 12a having a constant depth is provided on the opening edge (end surface) of the main forming recess 11a continuously over the entire periphery of the main forming recess 11a. Yes.
[0015]
In the protrusion 12a of the fixed mold 1a, the through hole forming protrusion 13a for forming the through hole 51b formed in the protrusion 51a of the molded article main body 51 is fixed to the fixed mold 1a. Projecting over the entire circumference at predetermined intervals toward the moving molds 2a, 2b facing the mold 1a, and when the moving molds 2a, 2b and one fixed mold 1a are joined Is configured so that the end surface of the through hole forming projection 13a is completely received by the particle surfaces 21a and 21b of the movable molds 2a and 2b.
[0016]
On the other hand, as shown in FIGS. 1 and 2, the other fixed mold 1b of the pair of fixed molds 1a and 1b has end faces (surfaces facing the first and second movable molds 2a and 2b). ), A molded product molding recess 11b having a size that can accommodate the molded product main body 51 entirely is formed, and the surface of the molded product molding recess 11b is used as a particle surface 12b.
[0017]
The first and second movable molds 2a and 2b joined to the pair of fixed molds 1a and 1b have their particle surfaces 21a and 21b (surfaces facing the pair of fixed molds 1a and 1b) mutually. It has the same structure that can have the same shape and the same size of particle surface, and can be joined to any of the fixed molds 1a and 1b. Specifically, part of the particle surfaces 21a and 21b of the moving molds 2a and 2b are formed on the movable particle surface portions 22a and 22b, and the movable particle surface portions 22a and 22b are in contact with the remaining particle surfaces. It is configured to move forward and backward. In FIG. 1, the movable particle surface portions 22a and 22b of the first and second movable molds 2a and 2b have the same planar shape as the shape of the open end of the main molding recess 11a of one fixed mold 1a. The shape and the same size are preferable, but the shape may be different from the shape of the opening end of the main molding recess 11a, or may be larger than the shape of the opening end of the main molding recess 11a. It may be small.
[0018]
For example, as shown in FIG. 1, the movable particle surfaces 22a and 22b are configured so as to be movable forward and backward with respect to the remaining particle surfaces. The parts including the part are separated into movable mold parts 23a and 23b, and the parts 21a and 21b separated on the movable mold parts 23a and 23b side are made movable particle surface parts 22a and 22b. Examples include a structure in which the movable particle surface portions 22a and 22b can be moved forward and backward with respect to the remaining particle surfaces 21a and 21b by moving the mold portions 23a and 23b forward and backward with respect to the remaining moving molds 2a and 2b. .
[0019]
When the first and second movable molds 2a and 2b in a state where the movable particle surface portions 22a and 22b are retracted are joined to one fixed mold 1a and clamped, the first and second movable molds 2a, The movable particle surface portions 22a, 22b of 2b are in a state of facing the main molding concave portion 11a, and the particle surface 14a composed of the surfaces of the main molding concave portion 11a and the projecting piece molding concave portion 12a of the fixed mold 1a; The intermediate cavity 3 is formed by the particle surface 21a (21b) including the movable particle surface portion 22a (22b) in the first (second) moving mold 2a (2b).
[0020]
Further, the first and second movable molds 2a and 2b in a state where the movable particle surface portions 22a and 22b are advanced from the position when the intermediate cavity 3 is formed are joined to the other fixed mold 1b and clamped. Then, the final cavity 4 is formed by the particle surface 12b of the other fixed mold 1b and the particle surface 21a (21b) including the movable particle surface portion 22a (22b) in the first (second) moving mold 2a (2b). It is configured to be.
[0021]
The molded product main body 51 is configured to be received by the particle surface 12b of the fixed mold 1b when the molded product main body 51 molded in the intermediate cavity 3 is housed in the final cavity 4. .
[0022]
The first and second movable molds 2a and 2b are integrally disposed on the same movable table 20, and the first and second movable molds 2a and 2b are simultaneously combined with a pair of fixed molds 1a. , 1b, and a pair of first and second movable molds 2a, 2b and a pair of them by rotating the movable table 20 around the rotation shaft 20a. The combination with the fixed molds 1a and 1b can be exchanged.
[0023]
Next, a procedure for manufacturing a molded product using the molding die A will be described. First, as shown in FIG. 1, the movable mold part 23a of the first moving mold 2a is displaced in the direction away from the fixed mold 1a with respect to the remaining mold part, so that the movable particle surface part 22a remains. While moving backward with respect to the particle surface 21a, that is, in a state of being immersed, the movable mold part 23b of the second movable mold 2b is displaced in the direction closer to the fixed mold 1a with respect to the remaining mold part. Then, the movable particle surface portion 22b is advanced so as to be flush with the remaining particle surface 21b. In addition, the molded product main body 51 molded in the intermediate cavity 3 of the previous process is attached to the entire surface of the movable particle surface portion 22b of the second moving mold 2b.
[0024]
After that, the moving table 20 is moved closer to the fixed molds 1a and 1b, and the first movable mold 2a and one fixed mold 1a are joined and clamped, and the first movable mold 2a An intermediate cavity 3 is formed by the particle surface 21a and the particle surface 14a of the fixed mold 1a. In this state, the end surface of the through-hole forming protrusion 13a of the fixed mold 1a is completely received and adhered to the particle surface 21a portion excluding the movable particle surface portion 22a of the first moving mold 2a. ing.
[0025]
At the same time, the second moving mold 2b and the other fixed mold 1b are joined and closed, and the final cavity 4 is formed by the particle surface 21b of the second moving mold 2b and the particle surface 12b of the fixed mold 1b. Form.
[0026]
In this state, the molded product main body 51 is accommodated in the final cavity 4, and the end surface 51c on the fixed mold 1b side in the moving direction of the second moving mold 2b in the molded product main body 51 is the same as that of the fixed mold 1b. The molten synthetic resin injected into the final cavity 4 does not enter or reach the end surface 51c of the molded article main body 51, and is in a state of being in close contact with the particle surface 12b. Note that the state where the molded product main body 51 is adhered to the entire surface of the movable particle surface portion 22b of the second moving mold 2b is maintained.
[0027]
Furthermore, the movable particle surface portion 22b of the second moving mold 2b is advanced relative to the position when the second moving mold 2b is joined to one fixed mold 1a to form the intermediate cavity 3. Therefore, the projecting piece 51a of the molded product main body 51 is in a state of being separated from the particle surface 21b of the second moving mold 2b, and accordingly, in the final cavity 4, the particle surface 21b of the second moving mold 2b. And it is in the separated state where it is not in contact with any of the particle surfaces 12b of the other fixed mold 1b.
[0028]
Next, as shown in FIG. 3, a synthetic resin in a molten state, preferably a transparent synthetic resin, is injected into the intermediate cavity 3, and an annular protruding piece 51a is protruded from the outer peripheral surface. The molded product main body 51 is formed, and a synthetic resin different from the synthetic resin injected into the intermediate cavity 3 is injected into the final cavity 4, and the outer frame portion 52 is formed on the outer periphery of the molded product main body 51. The molded product 5 is molded integrally.
[0029]
The synthetic resin injected into the intermediate cavity 3 and the synthetic resin injected into the final cavity 4 are different types, but the different types of synthetic resins have different molecular weights, monomer components, etc. In addition to different types of resins, synthetic resins having different colors due to different additives such as pigments contained in the synthetic resin, even if the synthetic resin is the same, are also compatible with each other. It is preferable to use a non-synthetic resin because the performance of the molding die can be maximized.
[0030]
Next, as shown in FIG. 4, the moving table 20 is moved in a direction away from the pair of fixed molds 1a and 1b, and the moving table 20 is integrally disposed on the moving table 20. The moving molds 2a and 2b are separated from the molds 1a and 1b, opened, and the molded product 5 is taken out from the final cavity 4.
[0031]
As shown in FIGS. 5 and 6, the molded product 5 molded in the final cavity 4 is formed by integrating an outer frame portion 52 on the outer periphery of the molded product main body 51, and the projecting piece of the molded product main body 51. with section 51a is in the state of being buried in the outer frame portion 52, a portion sandwiched the protrusion 51a in the outer frame portion 52 is formed in a state of being integrally connected through the through-hole 51b. The end surface 51c of the molded product main body 51 is exposed without being entirely covered with the outer frame portion 52, and the design pattern 51d formed on the end surface 51c is exposed. The end surface 51e of the molded product main body 51 that is in close contact with the movable particle surface portion 22b of the second moving mold 2b is also exposed without being entirely covered by the outer frame portion 52.
[0032]
Therefore, even if the molded product main body 51 and the outer frame portion 52 are formed of different types of synthetic resins, in particular, incompatible synthetic resins, the molded product main body 51 and the outer frame portion 52 are firmly integrated. Is not separated unexpectedly. Moreover, the outer frame portion 52 is formed on the surface 51c attached to the movable particle surface portion 22b of the second moving mold 2b in the molded article main body 51 and the surface 51c received on the particle surface 12b of the other stationary mold 1b. Are not integrated, and forming the molded product main body 51 from a transparent synthetic resin is preferable because a molded product having excellent design can be obtained.
[0033]
On the other hand, the molded product main body 51 molded in the intermediate cavity 3 is detached from the particle surface 14a of the one fixed mold 1a while being attached to the particle surface 21a of the first moving mold 2a.
[0034]
As shown in FIGS. 7 and 8, the molded product main body 51 molded in the intermediate cavity 3 is provided with an annular projecting piece 51a on its outer peripheral surface, and the projecting piece 51a has both sides thereof. A planar oval through hole 51b penetrating therethrough is provided over the entire circumference at predetermined intervals. A desired pattern 51d is recessed in the end face 51c of the molded product main body 51.
[0035]
Then, as shown in FIG. 9, the movable table 20 is rotated about its rotating shaft 20a, thereby allowing the pair of fixed molds 1a, 1b and the first and second movable molds 2a, 2b to move. Swap the combination. That is, the first moving mold 2a is opposed to the other fixed mold 1b, and the second moving mold 2b is opposed to the one fixed mold 1a.
[0036]
Simultaneously with or following the replacement of the combination of the pair of fixed molds 1a and 1b and the first and second movable molds 2a and 2b, the movable mold part 23a of the first movable mold 2a is moved to the other side. The movable particle surface portion 22a is moved forward by a predetermined distance with respect to the remaining particle surface 21a by being displaced toward the fixed mold 1b.
[0037]
As the movable particle surface portion 22a advances, the molded product main body 51 portion attached to the particle surface 21a excluding the movable particle surface portion 22a in the first moving mold 2a is detached, and the molded product main body 51 is moved to its end surface. Only 51e is attached to the entire surface of the movable particle surface 22a of the first moving mold 2a, that is, the projecting piece 51a of the molded article main body 51 is completely detached from the particle surface 21a of the first moving mold 2a. ing.
[0038]
On the other hand, the second moving mold 2b includes the movable mold portion 23b at the same time as or after replacement of the combination of the pair of fixed molds 1a and 1b and the first and second moving molds 2a and 2b. Is moved away from one fixed mold 1a to move the movable particle surface portion 22b backward with respect to the remaining particle surface 21b by a distance equal to the forward movement distance of the movable particle surface portion 22a of the first moving mold 2a. Let
[0039]
Thereafter, the moving table 20 is moved closer to the pair of fixed molds 1a and 1b, and the first movable mold 2a and the other fixed mold 1b are joined and closed to form the final cavity 4. Then, the molded product main body 51 is accommodated in the final cavity 4 and at the same time, the second movable mold 2b and one fixed mold 1a are joined and closed to form an empty intermediate cavity 3.
[0040]
Here, in a state where the pair of fixed molds is opposed to one fixed mold 1a, the movable particle surface portions 22a and 22b of the first and second movable molds 2a and 2b are both left as the remaining particle surfaces 21a and 21b. The first and second moving molds 2a and 2b are both formed to have the same shape and the same size particle surfaces 21a and 21b. The intermediate cavity 3 formed by the mold 2a and the one fixed mold 1a and the intermediate cavity 3 formed by the second moving mold 2b and the one fixed mold 1a have the same shape and the same size. Is formed.
[0041]
Similarly, even in a state where the pair of fixed molds are opposed to the other fixed mold 1b, the movable particle surface portions 22a and 22b of the first and second movable molds 2a and 2b are both left as the remaining particle surfaces 21a and 21b. The first and second moving molds 2a and 2b are both formed to have the same shape and the same size particle surfaces 21a and 21b. The final cavity 4 formed by the mold 2a and the other fixed mold 1b and the final cavity 4 formed by the second moving mold 2b and the other fixed mold 1b have the same shape and the same size. Is formed.
[0042]
Therefore, the end surface 51c facing the fixed mold 1b in the molded product main body 51 in the state of being accommodated in the final cavity 4 is completely received and closely in contact with the particle surface 12b of the fixed mold 1b. The molten synthetic resin injected into the final cavity 4 does not enter or reach the end surface 51c of the molded product main body 51. It should be noted that the end surface 51e of the molded product main body 51 is maintained on the entire surface of the movable particle surface portion 22a of the first moving mold 2a.
[0043]
Further, the projecting piece 51a of the molded product main body 51 is in a separated state in the final cavity 4 that is not in contact with the particle surface 21a of the first moving mold 2a and the particle surface 12b of the other stationary mold 1b. It has become.
[0044]
In the same manner as described above, molten synthetic resin is injected into the intermediate cavity 3 to mold the molded article main body 51, and at the same time, a synthetic resin different from the synthetic resin injected into the intermediate cavity 3 is added to the intermediate cavity 3. The molded product 5 is molded by being injected into the final cavity 4. Thus, the molded product 5 can be manufactured continuously and efficiently by repeating the above procedure.
[0045]
【The invention's effect】
The molding die according to claim 1 is configured such that a first moving die and a second moving die are opposed to a pair of fixed dies arranged side by side at a predetermined interval, and the first, a second moving mold configured to form a cavity by bonding alternately to the pair of the stationary mold, the first, both the second movable die, and the same size of particles surface with the same shape In addition, a part of the particle surface is formed on the movable particle surface part, and one fixed mold in the pair of fixed molds is joined to the one fixed mold with the movable particle surface part retracted. An intermediate cavity capable of molding a molded product main body integrally formed with a projecting piece portion on the outer peripheral surface by the first or second moving mold, while the other fixed mold, The movable particle surface part is the intermediate cavity A final cavity that can accommodate the molded product main body is formed by the first or second moving mold that is joined to the other fixed mold in a state where the molded product is advanced than when formed, and the molded product main body is used as the final cavity. Since the molded product main body is configured to be received by the particle surface of the other fixed mold when it is moved inward, the molded product main body and the synthetic resin constituting the molded product main body are different types of synthetics. A molded product comprising a resin part can be produced continuously and efficiently.
[0046]
Then, the molding die has at one of the stationary mold of the pair of the stationary mold, the main body mainly molding recess and the open end edge of the main molding recess for forming a portion of the molded article mainly since continuously in the molding recess to form a protrusion portion forming recesses for forming the protruding portions, formed integrally with projecting pieces of the molded article mainly a molded article mainly by the protruding portions A molded product obtained by firmly integrating the molded product main body with a portion made of a different kind of synthetic resin can be manufactured continuously and efficiently.
[0047]
Finally, the molding die is to form a recess projecting piece portion forming the entire circumference of the opening edge of the recess for the principal molding, a through-hole-forming projection on the protruding portions forming recesses When the one fixed mold and the first or second movable mold in the pair of molds are joined, the through-hole forming protrusion is received on the particle surface of the movable mold. Therefore , it is possible to manufacture a molded product in a state where a part of the molded product main body is exposed, and it is possible to manufacture a molded product excellent in design.
[0048]
Then, by using the molding die, an outer frame portion made of a synthetic resin different from the molded product main body is integrated with the outer periphery of the molded product main body, and a protruding piece is formed on the outer peripheral surface of the molded product main body. A molded part in which the protruding part is embedded in the outer frame part surrounding the molded product main body, and a synthetic resin constituting the molded product main body. Even though the synthetic resin constituting the outer frame portion is different, the molded product main body and the outer frame portion are not unexpectedly separated .
[0049]
Further, the molded product has a through hole formed in the projecting piece portion, and the portion sandwiching the projecting piece portion in the outer frame portion is connected and integrated through the through hole of the projecting piece portion. And the outer frame portion are firmly integrated with each other, so that they are not separated unexpectedly .
[Brief description of the drawings]
FIG. 1 is an end view showing an example of a usage state of a molding die of the present invention.
FIG. 2 is a perspective view showing one fixed mold.
FIG. 3 is an end view showing an example of a usage state of the molding die of the present invention.
FIG. 4 is an end view showing an example of a usage state of the molding die of the present invention.
FIG. 5 is a perspective view showing a molded product.
6 is a cross-sectional view of the molded product of FIG.
FIG. 7 is a perspective view showing a molded product main body.
FIG. 8 is a cross-sectional view showing a molded product main body.
FIG. 9 is an end view showing an example of a usage state of the molding die of the present invention.
[Explanation of symbols]
1a One fixed mold
11a Concave for main molding
12a Concave part for projecting part
13a Protrusion for through hole formation
14a Particle surface
1b The other fixed mold
11b Recess for main molding
12b Particle surface
2a First moving mold
21a Particle surface
22a Movable particle surface
2b Second moving mold
21b Particle surface
22b Movable particle surface 3 Intermediate cavity 4 Final cavity 5 Molded product
51 Main article
51a Projection piece
51b Through hole
52 Outer frame

Claims (1)

The first moving mold and the second moving mold are opposed to a pair of fixed molds arranged in parallel at a fixed interval, and these first and second movable molds are connected to the pair of fixed molds. configured to form a cavity by bonding alternately the mold, the first, the second movable mold together to give and take the particle surfaces of the same size in the same shape, a part of the particle surface Formed on the movable particle surface part, and by one fixed mold in the pair of fixed molds and the first or second moving mold joined to the one fixed mold with the movable particle surface part retracted When an intermediate cavity capable of forming the molded product main body, in which the protruding piece part is integrally formed on the outer peripheral surface, is formed, while the other fixed mold and the movable particle surface part are formed as the intermediate cavity. More advanced The final cavity that can accommodate the molded product main body is formed by the first or second moving mold that is joined to the other fixed mold in the state, and the molded product main body is moved when the molded product main body is moved into the final cavity. In a molding die configured to be received by the particle surface of the other fixed mold, a main body for forming a part of the molded product main body in one fixed mold of the pair of fixed molds A molding recess is formed, and a projecting piece molding recess for forming the projecting piece continuously from the main molding recess is formed over the entire periphery of the opening edge of the main molding recess. In addition, a through hole forming protrusion is formed in the protrusion for forming the protruding piece portion, and when the one fixed mold and the first or second movable mold in the pair of fixed molds are joined, the through hole is formed. Receiving the forming protrusion on the particle surface of the moving mold Molding die, characterized in that it is urchin configuration.

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