JP2008049534A - Two-color molding mold for manufacturing side visor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a two-color molding mold for manufacturing a side visor which can obtain a vehicular resin side visor while improving working properties by carrying out primary molding and secondary molding surely and in succession. <P>SOLUTION: The two-color molding mold for manufacturing the side visor which can mold a resin side visor includes, a fixed mold 1 having a recess 1a formed to imitate the shape of the resin side visor, a primary side movable mold 2 capable of performing primary molding by forming a primary cavity C1 in accordance with the recess 1a of the fixed mold 1, and a secondary side movable mold 3 capable of performing secondary molding by forming a secondary cavity in accordance with the recess 1a of the fixed mold 1 after the primary molding, and the primary side movable mold 2 and the secondary side movable mold 3 carry out two-color molding in turn in accordance with the recess 1a of the fixed mold 1. On the periphery of the recess 1a of the fixed mold 1, a waste boss forming part 1aa which forms a boss-shaped waste wall Ac on the periphery of a partially fabricated item A to be molded during the primary molding is formed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention provides a two-color mold for manufacturing a side visor capable of forming a resin side visor for a vehicle by sequentially performing a two-color molding in which the primary side movable mold and the secondary side movable mold coincide with the concave portion of the fixed mold. It is about.

  From the viewpoint of design and the like, many resin side visors for vehicles that are attached to the upper edge of a door such as an automobile are provided with two shades of color by spraying paint or the like on a resin molded product, for example. . However, the spraying operation of the paint is a factor that increases the manufacturing cost because it requires many manual operations such as a step of attaching a mask, a step of spraying, and a step of removing the masking.

By the way, two-color molding for side visor manufacturing, in which two movable molds (primary-side movable mold, secondary-side movable mold) are sequentially matched with the concave portions of the fixed mold and molten resin is poured into the mold. A mold is disclosed in Patent Document 1, for example. According to such a two-color molding die for manufacturing a side visor, a manual process such as a spraying process can be eliminated, so that a relatively large resin side visor is molded while suppressing an increase in manufacturing cost. can do.
JP 2000-141406 A

  However, in the conventional two-color molding mold for manufacturing the side visor, the semi-finished product obtained by the primary molding may adhere to the primary movable mold at the time of mold release and be removed from the recessed part of the fixed mold. It was. In this case, secondary molding cannot be performed even if the secondary side movable mold is matched, and it is necessary for the operator to manually return the semi-finished product attached to the primary side movable mold to the recessed part of the fixed mold. Workability will deteriorate.

  That is, by performing two-color molding with the secondary movable mold matched to the concave portion while the semi-finished product formed by the primary molding remains in the concave portion of the fixed mold, the primary molding and the secondary are continuously performed. Although the molding can be performed, if the semi-finished product obtained by the primary molding adheres to the primary side movable mold and is removed from the recessed part of the fixed mold, continuous two-color molding can be performed. On the other hand, workability deteriorates.

  The present invention has been made in view of such circumstances, and it is possible to obtain a resin side visor for a vehicle while improving workability by surely performing primary molding and secondary molding continuously. An object of the present invention is to provide a two-color mold for manufacturing a side visor.

  According to a first aspect of the present invention, a fixed mold having a recess that follows the shape of a resin side visor for a vehicle, a primary cavity is formed in conformity with the recess of the fixed mold, and the primary cavity is formed in the primary cavity. A secondary cavity is formed in conformity with the primary movable mold capable of performing primary molding by pouring molten resin for molding, and the concave portion of the fixed mold after the primary molding, and secondary molding is performed in the secondary cavity. And a secondary side movable mold capable of performing secondary molding by pouring molten resin, and the primary side movable mold and the secondary side movable mold sequentially match the concave portion of the fixed mold to perform two-color molding. In a two-color mold for manufacturing a side visor that can be molded into a resin side visor, a boss-shaped boss is formed on the periphery of the recessed portion of the fixed mold to form a boss-like scraped meat on the periphery of a semi-finished product formed during primary molding. A portion is formed.

  According to a second aspect of the present invention, in the two-color molding die for manufacturing a side visor according to the first aspect, a tip of a knockout pin disposed so as to be able to protrude and retract from the fixed mold is abutted against the boss-like discarded meat. The resin side visor after the secondary molding is discharged from the concave portion of the fixed mold.

  According to a third aspect of the present invention, in the two-color molding die for manufacturing the side visor according to the first or second aspect, the secondary movable mold has a resin reservoir formed in the vicinity of the gate at the time of the primary molding. A pinching portion for pinching is provided.

  According to a fourth aspect of the present invention, in the two-color molding die for manufacturing a side visor according to the third aspect, the clamping portion has a protrusion formed on a contact surface with the resin reservoir.

  According to a fifth aspect of the present invention, in the two-color molding die for manufacturing a side visor according to any one of the first to fourth aspects, at the time of primary molding by the primary movable mold, at the time of the secondary molding In this case, the drainage meat for the gate is formed with an insertion hole through which the gate can be inserted, and the molten metal for secondary molding is poured into the secondary cavity by inserting the gate into the insertion hole.

  According to the first aspect of the present invention, the boss forming portion for forming the boss-like scraped meat is formed on the periphery of the semi-finished product formed at the time of the primary molding at the periphery of the concave portion of the fixed mold. It is possible to reliably prevent the semi-finished product from adhering to the primary side movable mold. Therefore, a resin side visor for a vehicle can be obtained while improving workability by reliably performing primary molding and secondary molding continuously.

  According to the invention of claim 2, the tip of a knockout pin disposed so as to be able to protrude and retract from the fixed mold is abutted against the boss-like discarded meat, and the resin side visor after the secondary molding is formed from the concave portion of the fixed mold. Since it is discharged, it is possible to avoid the shape of the tip of the knockout pin from being transferred to the product surface of the resin side visor. In addition, the boss-like scraped meat has a function to prevent the semi-finished product from being inadvertently removed from the recess during the mold release after the primary molding, and reliably from the recess during the mold release after the secondary molding. This also has the function of discharging the resin side visor.

  According to the invention of claim 3, since the holding part for holding the resin reservoir formed in the vicinity of the gate at the time of primary molding is disposed in the secondary side movable mold, The resin side visor can be securely attached to the secondary movable mold, and the resin side visor can be easily carried out.

  According to the invention of claim 4, since the projection is formed on the contact surface with the resin reservoir, the clamping portion can be more securely clamped by biting the projection into the resin reservoir at the time of clamping. It is possible to easily carry out the resin side visor.

  According to the invention of claim 5, when the primary molding is performed by the primary side movable mold, the drainage meat for the gate is formed in which the insertion hole through which the gate in the secondary molding can be inserted is formed, and the gate is formed in the insertion hole. Since the molten resin for secondary molding is poured into the secondary cavity after insertion, it is possible to reliably avoid the molten resin for secondary molding from flowing into the gap between the recessed portion of the fixed mold and the semi-finished product. The two-color molding of the resin side visor can be performed with high accuracy.

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
The two-color molding die for manufacturing the side visor according to the present embodiment can be molded into a resin side visor for vehicles by performing two-color molding. As shown in FIG. 1, the fixed die 1 and the primary side It is mainly composed of a movable mold 2 and a secondary movable mold 3, and the primary movable mold 2 and the secondary movable mold 3 are integrally moved in the vertical and horizontal directions in the figure. Thus, the primary molding and the secondary molding can be sequentially performed.

  The fixed mold 1 has a recess 1a that follows the shape (surface shape) of a resin side visor for a vehicle, and a sprue 1b that discharges molten resin (primary molding molten resin) during primary molding. And a sprue 1c that discharges molten resin (secondary molding molten resin) during secondary molding. In addition, the code | symbol 1b in the figure has shown the rod-shaped operation | movement part for operating the clamping part 3b mentioned later.

  Further, as shown in FIG. 2, the concave portion 1a of the fixed mold 1 is disposed at the periphery thereof to form a plurality of boss-like discarded meat Ac on the periphery of the semi-finished product A (see FIG. 4) formed at the time of primary molding. A boss forming portion 1aa is formed. Furthermore, as shown in the figure, on the periphery of the recess 1a, there are a shape 1ac for forming a resin reservoir during primary molding and a shape 1ab for forming a drainage meat Ab for the gate in addition to the waste boss forming portion 1a. Built.

  Among these, the shape 1ab which forms the dumping meat Ab for gates is formed in the position where the gate 1c is arrange | positioned at the time of secondary shaping | molding. In addition, a knockout pin K (see FIG. 9) that can be freely protruded and retracted is disposed at a position where the discarded boss forming portion 1a is formed in the fixed mold 1, and the product (2 The resin side visor after color molding is configured to be easily discharged from the recess 1a.

  As shown in FIG. 3, the primary side movable mold 2 includes a die 2a that forms a primary cavity C1 in alignment with the concave portion 1a of the fixed mold 1, and the primary side mold 1a is moved from the gate 1b to the primary cavity C1. Primary molding can be performed by pouring molten resin for molding. The die 2a is formed with a resin reservoir forming portion 2b, and is configured such that a resin reservoir Aa (cold slug) can be formed when the molten resin for primary molding is discharged from the gate 1b. In the figure, reference numeral 2c denotes an insertion portion for allowing the operating portion 1d to pass therethrough and preventing interference with the die 2a.

  In the primary molding by the primary movable mold 2, the semi-finished product A as shown in FIG. 4 is molded. On the periphery of the semi-finished product A, there are a resin reservoir Aa formed by the resin reservoir forming portion 2b, a poultry waste meat Ab formed by the shape 1ab, and a boss-like discarded meat Ac formed by the discarded boss forming portion 1a. In addition to being formed, an insertion hole Aba through which the pouring gate 1c at the time of secondary molding can be inserted is formed in the pouring gate Ab.

  As shown in FIG. 6, the secondary movable mold 3 is provided with a die 3a that forms a secondary cavity C2 in alignment with the concave portion 1a of the fixed mold 1 after the primary molding. Secondary molding can be performed by pouring a molten resin for secondary molding into the cavity C2. The die 3a is formed with a clamping portion 3b so that the resin reservoir Aa formed near the gate 1b at the time of primary molding can be clamped.

  That is, the sandwiching portion 3b has a plurality of protrusions 3ba formed on one surface and an inclined surface 3bb formed on the other surface, and the secondary side movable mold 3 is fixed to form the cavity C2. When approaching the mold 1, as shown in FIG. 7, the operating portion 1d comes into contact with the inclined surface 3bb to move the holding portion 3b upward in the drawing by the action of the cam, and the protrusion 3ba holds the resin reservoir Aa. It is configured to obtain.

  When the secondary movable mold 3 is close to the fixed mold 1 and the cavity C2 is formed, as shown in FIG. 8, the gate 1c is inserted into the insertion hole Aba of the semifinished product A so as to face the cavity C2. It has become. In this state, by pouring the molten resin for secondary molding into the secondary cavity C2, the pouring waste meat Ab can be strongly brought into close contact with the concave portion 1a by the pressure. Thereby, even when the semi-finished product A is bent during the molding, it is reliably avoided that the molten resin for secondary molding flows into the gap between the concave portion 1a of the fixed mold 1 and the semi-finished product A. The two-color molding of the resin side visor can be performed with high accuracy.

Next, the operation of the two-color mold for manufacturing the side visor will be described.
First, from the state in which the fixed mold 1 and the primary movable mold 2 face each other (the state shown in FIG. 1), the primary movable mold 2 is moved to the left to match the fixed mold 1 (at the same time the secondary side The movable mold 3 also operates), and as shown in FIG. 3, a cavity C1 is formed between the recess 1c and the die 2a. In this state, a molten resin for primary molding is poured from the gate 1b into the cavity C1, and then cooled and solidified to obtain a semi-finished product A.

  At this time, as shown in FIG. 4, a plurality of boss-like discarded meat Ac is formed on the periphery of the semi-finished product A by the discarded boss forming portion 1 aa (see FIG. 2). Thereby, since the adhesiveness with respect to the recessed part 1a of the fixed mold 1 of the semi-finished product A can be improved, when the primary molding is finished and the primary side movable mold 2 is separated (released) from the fixed mold 1, As shown in FIG. 5, the semi-finished product A can be reliably left on the concave portion 1a side.

  After the primary molding, the primary side movable mold 2 and the secondary side movable mold 3 are moved downward and the secondary side movable mold 3 is fixed in a state where the semi-finished product A remains in the concave portion 1a of the stationary mold 1. The state is opposite to the mold 1. Thereafter, the secondary-side movable mold 3 is moved to the left to match the fixed mold 1 (the primary-side movable mold 2 also operates simultaneously), and as shown in FIG. 6, a part of the semi-finished product A and the die 3a To form a cavity C2.

  At this time, as shown in FIG. 7, the clamping part 3b moves to the resin reservoir Aa side to clamp the resin reservoir Aa, and as shown in FIG. 8, the gate 1c is inserted into the insertion hole Aba for the drainage meat Ab for the gate. It is assumed that it has been inserted through. However, since the protrusion 3ba is formed on the contact surface of the holding portion 3b with the resin reservoir Aa, the protrusion 3ba can bite into the resin reservoir Aa and can be firmly held at the time of holding.

  If the molten resin for secondary molding is poured from the gate 1c into the cavity C2 in such a state, secondary molding is performed while the waste meat Ab for the gate is brought into close contact with the fixed mold 1 side by the pressure of the molten resin for secondary molding. As described above, it is possible to reliably avoid the molten resin for secondary molding from flowing into the gap between the concave portion 1a of the fixed mold 1 and the semifinished product A, and the resin side visor can be accurately prevented. Two-color molding can be performed.

  If the molten resin for secondary molding is cooled and solidified, the resin B by secondary molding is formed at a desired position of the semi-finished product A. Thereafter, when the secondary movable mold 3 is separated (released) from the fixed mold 1, the knockout pin K is protruded, and the tip thereof is abutted against the boss-like discarded meat Ac. Thus, as shown in FIG. 9, a product (that is, a resin side visor in a state in which discarded meat is formed) is formed on the secondary movable mold 3 side by the abutting operation by the knockout pin K and the clamping by the clamping part 3b. It will be surely attached.

  As a result, the tip of the knockout pin K is abutted against the boss-like discarded meat Ac, and the resin side visor after the secondary molding is discharged from the concave portion 1a of the fixed mold 1, so that the product side of the resin side visor is knocked out. It is possible to avoid the shape of the tip of the pin K from being transferred. In addition, the boss-like discarded meat Ac has a function of avoiding inadvertent removal of the semi-finished product from the recess 1a at the time of releasing after the primary molding, and at the time of releasing after the secondary forming. This also has a function of discharging the resin side visor from the recess 1a.

  If the secondary side movable mold 3 and the primary side movable mold 2 are moved upward from this state and the primary side movable mold 2 is opposed to the fixed mold 1 (state of FIG. 10), the product is In addition to being able to be easily taken out, if the primary side movable mold 2 is again matched with the fixed side 1 after taking out the product, primary molding in the next two-color molding operation can be performed. Then, by trimming the discarded meat (boss-shaped discarded meat Ac, spout meat discarded Ab) and the resin reservoir Aa of the extracted product, a resin side visor that can be attached to the door of the vehicle can be obtained.

  According to the above-described embodiment, the boss forming portion 1aa for forming the boss-like scraped meat Ac is formed on the periphery of the semi-finished product A formed at the time of the primary molding on the periphery of the concave portion 1a of the fixed mold 1. It is possible to reliably prevent the semi-finished product A from adhering to the primary movable mold 2 at the time of mold release. Therefore, a resin side visor for a vehicle can be obtained while improving workability by reliably performing primary molding and secondary molding continuously.

  Further, the secondary movable mold 3 is provided with a clamping portion 3b for clamping the resin reservoir Aa formed in the vicinity of the gate at the time of the primary molding, so that the resin side visor after the secondary molding is provided. The resin side visor can be easily carried out by reliably adhering to the secondary movable mold 3. In particular, since the protrusion 3ba is formed on the contact surface with the resin reservoir Aa, the sandwiching portion 3b can be more securely sandwiched by causing the protrusion 3ba to bite into the resin reservoir Aa when sandwiched. It is possible to easily carry out the resin side visor.

  Although the present embodiment has been described above, the present invention is not limited to this. For example, instead of the protrusions of the sandwiching portion, other forms for sandwiching the resin reservoir (for example, the roughness of the contact surface with the resin reservoir) The frictional force may be increased by increasing the friction force). In this embodiment, the present invention is applied to a so-called die slide type two-color molding die, but may be applied to other two-color molding die such as a rotary type.

  The primary-side movable mold and the secondary-side movable mold can sequentially form a two-color molding by matching the concave portion of the fixed mold to form a resin side visor. If it is a two-color molding die for side visor production in which a discarded boss forming part for forming a boss-like discarded meat is formed on the periphery of a semi-finished product to be molded, one with a different appearance or other functions added, etc. It can also be applied to.

Overall schematic diagram showing a two-color molding die for manufacturing a side visor according to an embodiment of the present invention The top view which shows the recessed part of the fixed mold | type in the two-color molding die for the same side visor manufacture Schematic diagram showing a state where the primary movable mold matches the fixed mold in the two-color molding mold for manufacturing the side visor Schematic diagram showing the semi-finished product obtained by the primary molding in the two-color mold for manufacturing the side visor Schematic diagram showing a state where the primary movable mold is released from the fixed mold in the two-color mold for manufacturing the side visor Schematic diagram showing a state where the secondary movable mold matches the fixed mold in the two-color mold for manufacturing the side visor The schematic diagram which shows the state which the clamping part in the 2 color molding die for the same side visor manufacture clamped the resin reservoir Schematic diagram showing the flow of the secondary cavity and molten resin for secondary molding in the two-color molding die for manufacturing the side visor The enlarged schematic diagram which shows the state which the secondary side movable mold | type released from the fixed mold | type in the two-color molding die for the same side visor manufacture Schematic diagram showing a state in which the two-color molding in the two-color molding die for manufacturing the side visor is completed

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fixed type | mold 1a Recessed part 1aa Throw-off boss formation part 1b, 1c Gate 1d Operation part 2 Primary side movable type 2a Die 2b Resin pool formation part 3 Secondary side movable type 3a Die 3b Holding part 3ba Protrusion A Semi-finished product Aa Resin pool Ab Disposable meat for gates Ac Boss-shaped discarded meat B Resin formed by secondary molding C1 Primary cavity C2 Secondary cavity

Claims (5)

A fixed mold having a recess that follows the shape of a resin side visor for a vehicle;
A primary-side movable mold that forms a primary cavity in conformity with the concave portion of the fixed mold, and that can perform primary molding by pouring a molten resin for primary molding into the primary cavity;
A secondary movable mold that forms a secondary cavity in conformity with the concave portion of the fixed mold after the primary molding, and can perform secondary molding by pouring a molten resin for secondary molding into the secondary cavity;
A two-color molding mold for manufacturing a side visor, wherein the primary side movable mold and the secondary side movable mold are sequentially two-color molded in conformity with the concave portion of the fixed mold to mold a resin side visor. ,
A two-color molding die for manufacturing a side visor, wherein a waste boss forming portion for forming a boss-like discarded meat is formed on a peripheral edge of a semi-finished product formed at the time of primary molding at the peripheral edge of the concave portion of the fixed mold.   The tip of a knockout pin disposed so as to be able to protrude and retract from the fixed mold is abutted on the boss-shaped discarded meat, and the resin side visor after the secondary molding is discharged from the concave portion of the fixed mold. The two-color molding die for manufacturing a side visor according to claim 1.   The side visor manufacturing according to claim 1 or 2, wherein the secondary side movable mold is provided with a clamping portion for clamping a resin reservoir formed in the vicinity of the gate at the time of primary molding. Two-color mold for use.   The two-color molding die for manufacturing a side visor according to claim 3, wherein the clamping portion has a protrusion formed on a contact surface with the resin reservoir.   During the primary molding by the primary side movable mold, the drainage meat for the gate is formed in which the insertion hole through which the gate in the secondary molding can be inserted is formed, and the gate is inserted into the insertion hole to insert the secondary cavity. The two-color molding die for producing a side visor according to any one of claims 1 to 4, wherein a molten resin for secondary molding is poured into the side visor.

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