JPS63282450A - Molding method for longitudinal blade group for regulating wind direction of resistor - Google Patents

Abstract

PURPOSE:To reduce the manufacturing cost, by a method wherein longitudinal blade groups having pins are moulded in a parallel state by using first resin, a moulding space for a coupling rod is formed around the pin by means of a slide mold, and second resin is injected in the space. CONSTITUTION:A molding space formed by slide molds 7a and 7b communicates with a molding space formed by split molds 6a and 6b. First resin injected in the mold through a gate 8 formed by the upper parts of the split molds 6a and 6b flows through the two molds 6a, 6b and 7a, 7b, and a blade body 1 in a desired shape containing a pin 4 is integrally molded. After molding is completed and the resin is cured, the slide molds 7a and 7b are separated from each other by a given distance, and a molding space for a coupling rod 5 is formed on both sides of the pin 4. Second resin, for example, resin being incompatible with the first resin and having high shrinkability during cooling is injected in the space through a gate 9 situated below the slide molds 7a and 7b to mold the coupling rod 5.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the structure of a register used for introducing air into the interior of a motor vehicle for air conditioning. In particular, regarding the connection structure between each of the vertical blades installed in parallel in the register housing for adjusting the wind direction and the connecting rod that rotates them in unison, molding to rationally manufacture this. Regarding the method.

(Prior Art) Generally, as shown in FIG. 7, the wind direction adjustment mechanism of a register has horizontal lateral blades installed inside a box body composed of a hollow retainer 51 and a bezel 52 attached to the front surface thereof. 53 and a vertically extending vertical blade 54, which are rotatably supported around their respective axes.The horizontal adjustment of the air blown from the register is performed using a common connection that connects each vertical blade 54. This is done by rotating the vertical blades 54 at the same time by a desired angle using an operating knob or the like via the rod 55.

Conventionally, the connection between the vertical blade 54, the connecting port, and the connecting port 55 is as follows.
As shown in FIG. 8, pins 56 molded integrally with the lower part of each blade 54 are arranged so as to fit into holes 57 of a connecting rod 55 molded separately, and both are press-fitted. It was done. For this reason, a large number of man-hours are required for assembly, which also causes an increase in manufacturing costs.

[Means for solving problems]

The present invention aims to solve these problems,
The connection between the vertical blade and connecting rod of the conventional register,
This provides a method for assembling both parts at the same time during the molding process.

The purpose of this is to connect a group of vertical blades installed in the register to adjust the direction of the conditioned air blown into the vehicle cabin, and a pin protruding from each vertical blade to rotate the blades in unison. In this method, first, the group of vertical blades including the pins are molded in a parallel state using a first resin, and then the periphery of the pin is molded using a first resin. A molding space for the connecting rods is set using another mold or a slide mold, and a second resin is injected into this to cover the pins and arrange them so as to cross each vertical blade group. This is achieved by a molding method characterized by molding the connecting rod.

According to the method of the present invention, a group of vertical blades are taken out from the mold in a form that is combined with a single connecting rod, so it is possible to omit the labor-intensive assembly process as in the past. . Furthermore, we used a resin that has high shrinkage when cooled to mold the connecting rod, and supplied it around the already molded pin, so that after molding, the resin presses the pin. When the vertical blade group is incorporated into the resistor and operated by the operating knob, a suitable resistance is generated and a reliable operating feeling can be given to the operator.

〔Example〕

The present invention will be explained in more detail based on preferred embodiments shown in the drawings.

An example of a combination of a blade and a connecting rod according to the present invention has an overall shape as shown in FIG. That is, an arm 3 extending perpendicularly is integrally attached to a shaft 2 protruding from the lower part of the vertical blade main body 1, and a pin 4 facing downward is provided at the tip of the arm 3. A connecting rod 5 extends embedded in the pin 4 of each longitudinal blade body 1.

As shown in FIG. 2, since the head of the pin 4 is swollen into a spherical shape, the vertical blade body 1 can be rotated around the axis of the pin 4 while being supported so as not to be pulled out from the connecting rod 5. It is possible to move. Furthermore, for reasons explained later, the pin 4 is inserted while being pressed from the surrounding area by the resin that makes up the connecting rod 5, so there is a moderate amount of resistance when it rotates, providing a reliable operating feel. .

Next, a method of manufacturing the combination of the vertical blade and connecting rod of the first embodiment described above will be explained. As shown in FIG. 3, the mold includes split molds 6a and 6b for molding a large number of blade bodies 1, shafts 2, and arms 3 arranged in parallel.
and slide molds 7a and 7b for pin forming, which are installed in close contact with the lower part of the mold. This slide type 7
The molding spaces a and 7b communicate with the molding spaces of the split molds 6a and 6b, and the first resin, for example polypropylene, is injected into the mold from the first gate 8 provided above the split molds. Both types 5a, 5b and ? a, 7b to form the desired shape of the blade body 1 including the pin 4.

After this initial molding is completed and the resin has solidified, the slide molds 7a and 7b are pulled out a predetermined distance to form molding spaces for the connecting rods 5 on both sides of the pin 4, as shown in FIG. do. Then, a second resin such as polyester, which is not compatible with polypropylene, is introduced into the space from the second gate 9 provided below the slide molds 5a, 5b.
Then, a resin that has a high shrinkage property when cooled is injected to form the connecting rod 5. This second resin contracts around the pin 4 and fits snugly so as to apply a pressing force to it, providing the above-mentioned operational resistance.

As a second method of molding, as shown in FIG.
The blade body 1 including the pin 4 is molded with the first resin in the same manner as in the method described above, and then the slide molds 7a and 7b are removed and connected instead at the position corresponding to the pin 4, as shown in FIG. Another mold 10 having a molding space for the wand 5 may be attached, and the second resin may be injected into this through the second gate 9.

Next, a second example of forming a vertical blade shown in FIG. 1O, which is different from the previous example, will be described.

In the case of this vertical blade, the blade body 11 and the arm 1
Since the axial planes with No. 3 and No. 3 are not in the same plane and are perpendicular to each other, it is impossible to mold using the above-mentioned split mold.

Therefore, as a split mold, those having the configurations shown in FIGS. 11 to 18 are used. That is, split molds 16a and 16b for forming most of the upper part of the blade body 11 and the arm 13, and split molds 1 for forming the pin 14 and the lower part of the blade main body 11.
This is a combination of two sets, 7a and 17b.

These split molds are constructed by arranging a large number of molding spaces corresponding to the external shape of the vertical blade, which has the form shown in each of the horizontal cross-sectional views of FIGS. 13 to 18.

To form the vertical blade shown in FIG. 10 using these split molds 16a, 16b; 17a, 17b, first combine these split molds as shown in FIG.
When the first resin is injected from the first gate 18 provided above the pin 14.b, the resin fills the entire molding space and the pin 14. The vertical blade bodies 11 including the arms 13 are molded in parallel. Next, the split molds 17a, 1 forming the lower part
7b is removed and a mold 20 is installed in its place, in which a molding space 21 for a connecting rod 15 connecting the pins 14 of each molded vertical blade body 11 extends across each pin 14,
A second resin is injected through a second gate 19 provided thereto to form the connecting rod 15.

Next, regarding the third embodiment of the present invention, FIGS.
This will be explained with reference to the figures. In the above two embodiments, the first resin is injected into the molding space for the blade, etc., and after waiting for time for it to solidify, the mold is replaced and the second resin is poured into the molding space for the connection port 7. Since molding is completed by injecting the resin into the resin, it may take a long time and be inefficient depending on the type of resin used. The third embodiment solves this drawback and makes it possible to proceed with the work rationally using a rotary molding machine.

An example of the shape of a vertical blade formed by this method is shown in FIG. 19. In this example, the arm connecting the blade body 21 and the pin 24 is omitted, and the tip of the pin 24 is a semicircular removal stop portion 24a. This is to facilitate release from the mold during molding and to prevent damage to the product.

In this molding method, first, a common movable mold (cavity) 26a,
First fixed mold (core) 26b and first sliding mold 27
A molding space as shown in FIG. 20 is formed by a. Of course, a plurality of molding spaces are provided in parallel. A first resin is injected into the movable mold 26a through a gate 28 provided in a submarine style to form the blade main body 21 and the pin 24. In this case, the mold light part of the slide mold 27a has the lower surface 21a (corresponding to the root surface of the pin 24) of the blade main body 21 shown in FIG. 19 as a reference surface. Next, as shown in FIG. 21, the slide mold 27a
When the mold 26a is released and the movable mold 26a is moved downward, the molded product is automatically separated from the gate 28. This action activates the sprue ejection pin 30 to remove the slag in the runner.

Next, as shown in FIG. 22, the movable mold 26a is rotated 1806 degrees around the vertical axis of the molding machine with the molded product attached thereto, so as to correspond to the second fixed mold 26c. In addition to this, the second
By applying the slide mold 27b, the molding space for the connecting rod is set to extend across each pin 24.

A second resin is injected into this space through the gate 29, and a common connecting loft 25 is formed. As shown in FIG. 23, when the slide mold 27b is released and the movable mold 26a is moved downward in the same way as before, the molded product is automatically separated from the gate 29, and the action of the sprue protruding pins 30 and 31 The slag in the lunch is removed by At the same time, the product ejection pin 32 is actuated to remove the completed product from the movable mold.

Note that the molded product obtained in this example has a semi-circular shape in which the back surface of the pin 24 retaining portion 24a has a slight bulge as shown in FIG. Connecting rod 25 in contact and later formed
A corresponding depression is formed on the side of the register, and when rotating the vertical blade from the position where the depression and the protuberance match when adjusting the wind direction of the register (this wind direction is most often used), This is preferable because resistance occurs.

Also, as a modification of the embodiment shown in FIGS. 2 to 4, a second
26 and 27 show how to obtain the combination of blade and connecting rod as shown in FIG. 5. This can be easily understood by referring to the explanations regarding FIGS. 3 and 4.

〔Effect of the invention〕

As detailed above, according to the present invention, the vertical blade groups are first molded in a mold in a parallel state, and then only the mold of the part corresponding to the pin is slid or replaced, and connected around the pin. We set up a molding space for the rod, and then poured resin with high shrinkage into it to mold the connecting loft.This makes it easy to mold the vertical blade and connecting rod separately as in the past, and then assemble them later. Compared to this, the number of man-hours can be significantly reduced. Moreover, because of the shrinkable resin, a moderate amount of pressure is generated between the pin and the connecting rod, and when the completed register is operated with a control lever etc. to operate the vertical blades to adjust the wind direction, there is a moderate sense of resistance. occurs and operations are performed comfortably.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the relationship between a group of vertical blades and a connecting rod made according to the present invention, FIG. 2 is a partially enlarged sectional view, and FIGS. 3 and 4 are a first implementation of the method of the present invention. 5 and 6 are sectional views showing the steps of the second embodiment of the method of the present invention, FIG. 7 is a sectional view showing the outline of the structure of the register, and FIG. 8 is the conventional method. FIG. 9 is a partially enlarged cross-sectional view showing the connection between the connecting loft and the pin in FIG. 8, and FIG. 10 is a vertical blade of another shape. FIGS. 11 and 12 are sectional views showing the procedure for forming the vertical blade shown in FIG. FIG. 19 is a perspective view of a vertical blade of yet another shape. FIGS. 20 to 23 are sectional views showing the procedure for molding the vertical blade of FIG. 19 using a rotary molding machine. FIG. 24 is a perspective view showing another aspect of the pin of the vertical blade in FIG. 19; FIG. 25 is a partially enlarged sectional view showing another aspect of the combination of the vertical blade group and the connecting rod according to the present invention; 26 and 27 are cross-sectional views showing the procedure for forming the vertical blade and connecting rod of FIG. 25. 1-Blade body 2--Shaft 3-Arm 4-Pin 5 Connecting rod 6a, 6b-Split type? a, 7b...-split mold L Fig. 2 Fig. 3 Fig. 4 Fig. 5 Fig. 6 Fig. 8 Fig. 9 Fig. 11 Fig. 12 Fig. 13 S2q') tft Fig. 14 C -C cross section 1S times dd cross section] 66 times -e cross section 17th figure f-J cross section 18 figure 19

Claims (1)

[Claims] 1. Engages with a group of vertical blades installed in the register to adjust the direction of the conditioned air blown into the vehicle interior, and with pins protruding from each vertical blade to rotate them all at once. A method of resin molding one common connecting rod, wherein the vertical blade group including the pin is first molded in a parallel state with a first resin, and then the vertical blade group including the pin is molded separately around the pin. Setting a molding space for the connecting rod by a mold or a slide mold,
A molding method characterized by injecting a second resin into the resin to mold the connecting rods arranged so as to enclose the pins and cross each vertical blade group.