JPH02102012A - Parts molding assembling equipment - Google Patents

Abstract

PURPOSE:To efficiently assemble two parts at good accuracy by separately molding two parts with a mold block having two cavities and holding one parts in the mold block and overlapping the other parts thereon, melting and bonding both parts. CONSTITUTION:Mold clamping of a mold block 54 is performed and then molten resin is injected into a cavity 55 for molding a reel main part via a hot runner 35 and also injected into a cavity 56 for molding an upper-side flange plate via a semi-hot runner 37. Thereby the reel main part 19 and the upper-side flange plate 10 are separately molded. In such a state that mold opening of the mold block 54 is completed, the reel main part 19 is held to a movable-side retainer plate 46 and the upper-side flange plate 10 is held to the inside of a fix-side retainer plate 28. A rotary shaft 45 is rotated at about 180 deg. from this state and the bonding projections 16, 16 of the reel main part 9 are opposed to the bonding holes 18, 18 of the upper-side flange plate 10 on the same shaft respectively. Then ultrasonic wave vibration is propagated to the horn 61 of an ultrasonic wave welder and also both the reel main part 19 and the flange plate 10 are overlapped and integrally bonded.

Description

DETAILED DESCRIPTION OF THE INVENTION The parts molding and assembling apparatus of the present invention will be explained according to the following items.

A. Field of industrial application B1 Overview of the invention C1 Prior art [Figures 10 and 11 (a) - Background of boat fishing [Figure 10] b. Example of conventional tape reel molding and assembly method [Figure 11 Figure D1 Problem to be solved by the invention [Figs. 10 and 11] E1 Means for solving the problem F, Example [Figs. 1 to 9] a. Tape cassette [Figs. 7 to 9] Figure 9] b0 parts molding and assembly device [Figures 1 to 6 b-1, fixed side mold [Figures 1, 2, 4 to 6] b-1-a, fixed side Mounting plate, fixed side mold plate b-1-b, slide plate b-2, movable side mold [Fig. 1, Fig. 3, Fig. 5, Fig. 6] b-3, Mold clamping of mold block [Fig. 1, b-4, Air cylinder [Fig. 1, Fig. 2, Fig. 4 to Fig. 6, c-b-5, Ultrasonic welding machine horn [Fig. 1, Fig. 2, Fig. 4]
Figures to Figures 6] b-6, Eject mechanism [Figures 1, 5, 6] b-7, Operation [Figures 1, 5, 6] b-7-a,
Molding [Figure 1] b-7-b, Opening the mold, holding the upper flange plate [Figure 5 (A) Figure 5 (B)] b-7-c, Rotating the movable mold [Figure 5] (C)] b-7-d, Overlapping and joining of the reel main part and upper flange plate [Fig. 5 (D), Fig. 6] b-7-e, Mold release [Fig. 5 (E) ] 011 Effects (A, Industrial Application Field) The present invention relates to a novel parts molding and assembly device. For more information,
It relates to a device to obtain a predetermined member by combining two parts that can be combined with each other, particularly two parts molded by a mold using synthetic resin as materials, and in which each of the two parts is assembled separately within one device. The molding of the molded parts and the joining of these two molded parts can be performed continuously, thereby making it possible to mold each of the two parts neatly without any restrictions on the materials used, and It is an object of the present invention to provide a new parts molding and assembly apparatus that can assemble two parts with high precision and efficiency and can manufacture this type of member at low cost.

(B. Summary of the Invention) The parts molding and assembling device of the present invention is a parts molding and assembling device that combines two parts each molded from a synthetic resin to obtain a predetermined member. A mold block for molding, a means for superimposing two parts molded by the mold block, and a means for joining together the two superposed parts, thereby making it possible to combine the two parts. each neatly,
Furthermore, the material can be molded without any limitations, and two parts can be assembled with high precision and efficiency, making it possible to manufacture this type of component at low cost. It is.

(C, Prior Art) [Figures 10 and 11] (a, - Boat Fishing Background) [Figure 10] Today, various parts are made of synthetic resin, and such parts are usually It is molded using a mold, and injection molding using thermoplastic resin is often used as the molding method.

By the way, it would be convenient if each part of the synthetic resin parts formed in this way could be formed in one molding process, that is, if each part could be molded integrally, but there are some
Even if it is structurally possible to integrally mold each part, such integral molding may be difficult due to differences in the materials, colors, etc. required for each part.

For example, a tape reel a for a video tape cassette shown in FIG. It consists of plate-shaped flanges c and d, a magnetic tape e is wound around the hub b, and the flange c
, d so that the side edges of the magnetic tape e are aligned at a constant height and are neatly wound. The upper flange C is usually transparent so that the remaining amount of the magnetic tape e wound around the hub b can be visually confirmed, and the lower flange d is formed in the color of the magnetic tape e (black). The lower flange d is formed to have a color that has a high contrast with respect to the lower flange d (e.g., white or a color close to it), and is made of a material with excellent wear resistance.

Therefore, in such a tape reel a, the hub b
Since it is difficult to integrally mold the hub b and the upper and lower flanges c and d, in many cases, the hub b and the lower flange d are formed integrally, and this and the upper flange C are made separately. The two parts thus obtained, viz.
A molded part f consisting of a hub b and a lower flange d (hereinafter referred to as the "reel main part"), a molded part g mainly consisting only of the upper flange C (hereinafter referred to as the "flange plate"); We are trying to combine them into one.

(b. Example of conventional tape reel molding and assembly method) [First
[Fig. 1] There are several conventional methods for forming and assembling tape reel a consisting of two parts f and g, as shown in Fig. 11. After molding g separately using two fill molds i, the reel main part f and flange plate g are taken out from these molds i, and then the reel main part f is molded by a fusing device j. The method of fusing the upper surface of the hub b and the center of the flange plate g is most widely used, and a specific example of such a molding and assembly method is described, for example, in Japanese Utility Model Publication No. 57 There is a publication No.-9983.

It has also been proposed to mold these two parts f and g using a technique similar to the so-called two-color molding technique in resin molding. For example, JP-A-62-17030
No. 9 uses a molding die equipped with a slide core,
- The reel main part f is formed by blow molding, and the flange plate g is formed by secondary forming, so that the center part of the flange plate g is melt-bonded to the upper surface part of the reel main part f during the secondary forming. The method is described.

(D. Problem to be solved by the invention) [Figure 10, 1
[Figure 1] Conventional methods for molding and assembling such tape reel a have the disadvantages of increasing the cost of tape reel a, limiting the types of resin materials used, or making the finished tape reel look bad. There are various problems such as

That is, according to the method of forming the reel main part f and the flange plate g in advance as separate parts and then joining them together, the reel main part f and the flange plate g require dedicated molds, respectively. i and a molding device for performing molding using these molds, and in addition to these, a fusing device j is also required, so the equipment cost is very high.
The manufacturing cost of the tape reel a is high, and the manufacturing process is time-consuming, which makes it inefficient.Furthermore, since forming and joining are performed using separate devices, it is difficult to connect the reel main part f and the flange plate g at the time of joining. There is a problem in that errors and variations occur in the combined dimensions between the two, making it difficult to obtain high accuracy in the combination.

In this regard, two-color molding technology requires less equipment such as molding molds, which reduces costs, and
Since the two parts f and g can be molded and joined within one mold, there are advantages in that efficiency is high and relatively high accuracy can be obtained in assembly. However, on the other hand, in the secondary molding in which the flange plate g is formed, the molten resin that is the material of the flange plate g comes into contact with the upper surface of the reel main part f, which has already been formed in the primary molding. Because of the melting process, this molten resin mixes with the transparent flange plate g, causing the colors to mix, and the joining surface to become jagged, resulting in a very dirty area. There are various problems in that molten resin requires strict temperature control to ensure proper melting, and the types of materials that can be used are limited.

(E. Means for Solving the Problems) Therefore, in order to solve the above problems, the parts molding and assembly apparatus of the present invention has a cavity for separately molding two parts that are combined into one mold block. a holding mechanism that holds one of the two molded parts in the mold block, an overlapping mechanism that overlaps the other part onto the one part, and a fusion joining mechanism that melts and joins these two parts together. It was established.

Therefore, according to the parts molding and assembling apparatus of the present invention, the molding and joining of two parts can be performed continuously in one apparatus even though the molding is performed separately, so the materials for each part are limited. It is possible to form and combine the parts neatly without mixing the materials of each part, and it can be manufactured at low cost because the equipment cost is low and manufacturing efficiency is high. high accuracy can be obtained.

(Embodiment F) [The details of the parts molding and assembling apparatus of the present invention will be explained in accordance with the illustrated embodiments below in FIGS. 1 to 9.

In the illustrated embodiment, the parts molding and assembling apparatus of the present invention is applied to a parts molding and assembling apparatus 1 for manufacturing tape reels for videotape cassettes.

First, an example of a tape cassette will be explained, and then the parts molding and assembly apparatus 1 will be explained.

(a, tape cassette) [FIGS. 7 to 9, 2 is a tape cassette.

3 is the cassette case of tape cassette 2, with upper and lower 2
Two case halves 4.5 are integrally connected to form a thin box shape, and tape outlets 6.6 are formed at both ends of the front surface, and the front surface has a lid that can be opened and closed. covered by 7.

8 is a tape reel on the supply side, and 9 is a tape reel on the winding side, each part of which is made of synthetic resin.

These tape reels 8 and 9 each have two disk-shaped upper and lower flange plates 10 and 10 of the same size.
11.11 and a substantially cylindrical hub 12.12, the lower flange plate 11.11 is positioned so as to protrude laterally from a position near the lower end of the hub 12.12. The hub 12.12 is formed integrally with the hub 12.12, and has an engagement hole 13.13 opened on its lower surface, and an axis of the engagement hole 13.13 is formed on the inner peripheral surface of the engagement hole 13.13. Engagement protrusions 14, 14, . . . extending in the direction are formed at regular intervals in the circumferential direction. Also, hub 12.1
At the center of the upper end surface of 2 is a spring abutting protrusion 1 having a substantially convex hemispherical shape.
5.15 is formed, and small coupling protrusions 16.1 are formed from two positions on opposite sides of the spring abutment protrusion 15.15.
6, ... are provided to protrude upward, and the upper flange plate 1
0.10 has a circular insertion hole 17.17 formed in its center, and small circular coupling holes 18.18 at two positions on opposite sides of the insertion hole 17.17.
... is formed. and the coupling protrusion 16.
16,... are inserted through the coupling holes 18.18,... formed in the upper flange plate 10.10, and the coupling holes 18.18,... of the coupling projections 16.16,... The portions 16a, 16a, . . . that protrude upward from the .
Thereby, the lower flange plate 11.11 and the hub 12
．． 12 (hereinafter referred to as the "reel main part") and the upper flange plate 10.10 are integrally connected, and the top of the spring abutment part 15.15 is connected to the upper flange plate 10.10.
It is positioned so as to protrude upward from the insertion hole 17.17 of No.10.

The reel main part 19 is made of a synthetic resin with good wear resistance, such as acetal, polyacetal (POM), etc., in white or a color close to white, and the upper flange plate 10
．． 10 is made of transparent material such as polystyrene (GP) or acrylonitrile styrene (AS).

Further, a large number of engagement notches 20, 20, . . . are formed on the outer peripheral edge of the lower flange plate 11, 11.

The tape reels 8 and 9 are housed inside the cassette case 3 so as to be rotatable horizontally apart from each other, and both ends of the magnetic tape 21 are fixed to the hubs 12 and 12 of the tape reels 8 and 9. A predetermined amount of the magnetic tape 21 is wound, and a part of the magnetic tape 21 is led out of the cassette case 3 from the tape outlet 6.6.

Note that the lower ends of the hubs 12.12 of the tape reels 8 and 9 are connected to openings 22a formed in the bottom plate 22 of the cassette case 3;
22a with a slight margin, and the tip of a reel presser spring 24.24 supported on the inner surface of the top plate 23 of the cassette case 3 is in elastic contact with the spring contacting protrusion 15.15. When the tape cassette 2 is not installed in the video tape recorder, the lower flange plate 11.11 is pressed against the bottom plate 22 to prevent the tape reel 8.9 from rattling inside the cassette case 3. Further, a reel stopper (not shown) provided inside the cassette case 3 is engaged with the engagement notches 20.20, . . . formed in the lower flange plate 11.11, thereby preventing rotation of the tape reel 8.9. has been done. When the tape cassette 2 is installed in the video tape recorder, the reel engagement shafts of the two reel stands are aligned with the engagement holes 13 and 13 of the tape reel 8.9.
, the tape reel 8.9 and the reel stand rotate together, and the tape reel 8.9 is pressed upward relative to the cassette case 3 and is pressed against the inner surface of the cassette case 3. The reel is placed in a non-contact state, and the rotation is no longer blocked by the reel stopper.

(b. Parts molding and assembling device) [Figures 1 to 6] The parts molding and assembling device 1 consists of two molded parts that constitute the tape reel 8.9, namely a flange plate 10 and a reel main part 19. A mold block having cavities for molding each separately; a holding means for holding the molded upper flange plate 10 in the mold block; Overlapping means for partially rotating the main part 19 to face the upper flange plate 10 and overlapping the main part 19 and the upper flange plate 10; It consists of a melting and joining means etc. which melt and join the main part 19 and the upper flange plate 10 together.

(b-1, fixed side mold) [Figs. 1, 2, 4 to 6] 25 is a fixed side mold.

(b-1-a, fixed side mounting plate, fixed side template) 26 is a fixed side mounting plate, and the left and right direction (the direction toward the left in Fig. 1 is the left side, and the direction toward the right is the right side) Also,
In the figure, the upward direction is defined as the front side, and the downward direction is defined as the rear side. In the following description, when directions are indicated, this direction will be used. ) is formed into a long rectangular plate.

27, 27, . . . are guide shafts supported by a machine base (not shown) so as to extend in the front-rear direction, and these guide shafts 2
7.27, . It is fixed to...

Reference numeral 28 denotes a stationary side template, which also has a substantially rectangular thick plate shape long in the left-right direction, and is fixed to the rear surface of the stationary side mounting plate 26.

A cavity forming recess 30 is formed approximately in the center of the left half of the rear surface 29 of the fixed side mold plate 28, and its inner surface is located in the thickness direction of the outer peripheral surface of the lower flange plate 11 among the outer surfaces of the reel main portion 19. It has the same shape as the upper part from the approximate middle part of .

Further, a rectangular slide plate arrangement recess 31 that is long in the vertical direction is formed in the right half of the rear surface 29 of the fixed side mold plate 28, and a relatively central part of the slide plate arrangement recess 31 in the vertical direction is formed. A deep working recess 32 is formed, and four cylinder arrangement holes 33, 33, . , a mounting hole 34 is formed between the right side surface of the working recess 32 and the right side surface of the stationary template 28.
are formed respectively, and both left and right sides of the slide plate arrangement recess 31 are formed in a dovetail shape, and the cylinder arrangement holes 33, 33, . . . have four square corners when viewed from the front and back directions. They are arranged so that each is located separately.

35 is a hot runner, the tip gate of which opens directly into the cavity forming recess 30;

36 is a submarine gate, which has a structure divided into two in the front and back direction, and has two divided recesses 36a, 36.
One side 36a of b is formed on the rear surface 29 of the stationary side mold plate 28 at a position close to the middle position in the vertical direction of the slide plate arrangement recess 31 from the left. 37 is a semi-hot runner, and the tip gate of the semi-hot runner 37 opens into the submarine gate 36.

(b=1-b, slide plate) 38 and 39 are slide plates.

These slide plates 38 and 39 each have approximately the same size, are rectangular plate shapes that are long in the left and right direction when viewed from the front, are lined up in the vertical direction, and have rear surfaces 38 a and 39 a. are arranged so as to be slidable in the vertical direction in the slide plate arrangement recess 31 in a state where they are located on the same plane as the rear surface 29 of the fixed side mold plate 28, and at the joining position where they are joined to each other as shown in FIG. and the separate positions spaced apart from each other as shown in FIG. The contact point is located at the same height as the submarine gate 36.

And the rear surface 38a of the slide plates 38 and 39,
39a each has a semicircular shallow recess 40.40'
is formed, and when the slide plates 38 and 39 come to the joining position, a circular cavity forming recess 41 is formed by these two recesses 40 and 40', and the inner surface of the cavity forming recess 41 is connected to the tape reel 8.9. It has the same shape as approximately half of the outer surface of the upper flange plate 10 in the thickness direction.

Note that the right end of the fixed side portion 36a of the submarine gate 36 is connected to the front surfaces 38a, 3 of the slide plates 38 and 39.
It is continuous with gate recesses 38b and 39b formed in 9a.

(b-2, Movable mold) [FIGS. 1, 3, 5, 6] 42 is a movable mold located behind the fixed mold 25.

Reference numeral 43 denotes a slide base, which has approximately the same shape and size as the fixed side mounting plate 26, and has supported holes 43a, 43a, . . . formed at its four corners. 43a, 43a.

By inserting the guide shafts 27, 27, . . . into the guide shafts 27, 27, . . . , the guide shafts 27, 27, .

Reference numeral 44 indicates a movable mounting plate in the form of a rectangular plate long in the left-right direction, and reference numeral 45 indicates a rotating shaft that is rotated by a drive mechanism (not shown) provided on the slide base 43. The slide plates 38 and 39 are inserted through the insertion hole 43b formed in the approximate center of the base 43 and protruded forward, and the axis thereof is joined to the center of the cavity forming recess 30 formed in the stationary template 28. It is arranged so as to extend in the front-back direction through a central position between the center of the cavity-forming recess 41 formed by the cavity forming recess 41 .

The movable side mounting plate 44 is positioned so as to be in contact with the front surface of the slide base 43, and its center portion is connected to the rotation axis 4.
It is fixed to the front end portion 45a of 5.

Reference numeral 46 denotes a movable side template, which is formed into a rectangular plate shape having approximately the same size as the fixed side template 28 when viewed from the front and back direction, and both ends of the movable side template 46 are connected to each other through spacer blocks 47 and 47. The movable side mounting plate 44 is fixed to the movable side mounting plate 44, and therefore there is a phase gap between the movable side mounting plate 44 and the movable side mounting plate 44.

A cavity forming recess 49 is formed approximately in the center of one half of the front surface 48 of the movable mold plate 46, and the inner surface of the cavity forming recess 49 is connected to the lower flange plate of the outer surface of the reel main portion 19. The core 50 has the same shape as the lower part from the middle part in the thickness direction of the reel 11, and a core 50 projects forward from the center part, and the outer surface of the core 50 has the same shape as the inner surface of the reel main part 19. have.

Reference numeral 51 denotes a shallow cavity forming recess formed approximately at the center of the other half of the front surface 48 of the movable mold plate 46, and its inner surface is approximately the same as the lower half of the outer surface of the upper flange plate 10 in the thickness direction. In addition, a small protrusion 52 protrudes from the center thereof, and further small protrusions 53 and 53 protrude from two positions on opposite sides of the protrusion 52 and lined up in the vertical direction. ing.

The movable side portion 36b of the submarine gate 36 is formed on the front surface 48 of the movable template 46 at a position that contacts the cavity forming recess 51 from the cavity forming recess 49 side.

Furthermore, the distance between the centers of these two cavity forming recesses 49 and 51 is the same as the distance between the centers of the two cavity forming recesses 49 and 51. It is equal to the distance from the center.

(b-3, Clamping of Mold Block) [FIG. 1] The mold block 54 is constituted by the fixed mold 25 and the movable mold 42 described above.

The mold block 54 is clamped in such a manner that the movable mold 42 is oriented as shown in FIG. The cavity forming recesses 51 of 42 are oriented to face the cavity forming recesses 41 formed by the slide plates 38 and 39 (hereinafter referred to as the "orientation during molding"), and the slide plates 38 and 39 are at the joining position. This is done by moving the movable mold 42 forward from this state, thereby defining two cavities for separately molding the reel main portion 19 and the upper flange plate 10.

That is, when the mold block 54 is clamped in this way,
The cavity forming recess 30 of the fixed side mold plate 28 and the cavity forming recess 49 of the movable side mold plate 46 are joined to form a cavity for molding the reel main part 19 by the inner surfaces of these cavity forming recesses 30EL and 49 and the core 50. 55 is defined, and the cavity forming recess 41 formed by the slide plates 38 and 39 and the cavity forming recess 51 of the movable mold plate 46 are joined, and the upper flange plate 10 is formed by the inner surfaces of these cavity forming recesses 41 and 51. A cavity 56 is defined for this purpose, and the submarine gate 36 is defined by joining the recess 36a of the stationary mold plate 28 and the recess 36b of the movable mold plate 46.

(b-4, Air cylinder) [Figures 1, 2, 4 to 6] 57.57, . . . are air cylinders, and the cylinder cases 58, 58, . The part is fixed side mold 25
The cylinder arrangement holes 33, 33, . . . are provided in the cylinder arrangement holes 33, .

59.59,... are air cylinders 57.57,...
piston rods, the tips of which protrude rearward from the cylinder cases 58, 58, . . . , and the tips of these piston rods 59, 59, . . . have suction cups 60, 60, . is fixed. And sucker 6
0.60, . . . as shown in FIG. 1, the standby position spaced forward from the slide plates 38 and 39, and the rear surface 29 of the stationary template 28 as shown by the two-dot chain line in FIG.
The suction position is slightly protruded toward the rear, and at least when the suction position is reached, negative pressure is created inside the suction position.

(b-5, horn of ultrasonic welding machine) [Fig. 1, Fig. 2,
4 to 6 The roller 1 is a horn of an ultrasonic welding machine, and its main portion 62 is supported in the mounting hole 34 provided in the stationary template 28, and the head portion 63 is a horn of an ultrasonic welding machine. 28 in the working recess 32, and a predetermined distance 1iI in the vertical direction on the rear surface of the head portion 63! Two contacts 64 and 64 are provided protrudingly spaced apart from each other by 1iff.

(b-6, Eject Mechanism) [Figures 1, 5, and 6 The roller 5 is an eject plate, and the guide pin 66 is provided between the movable side mounting plate 44 and the movable side mold plate 46. 6
6, . . , so as to be slidable in the front-rear direction, and two eject pins 67, 67 are provided to protrude rearward. 68.68 is an insertion hole formed in a portion between the rear surface of the movable template 46 and the cavity forming recess 49 so as to extend in the front-rear direction, and the front part of the eject pin 67.67 is inserted into this insertion hole 68. .68 is inserted. and,
Before the molded part is released from the mold, the eject plate 65 is held at a standby position where the front end surfaces of the eject pins 67, 67 form part of the inner surface of the cavity forming recess 49.

(b-7, operation) [Figures 1, 5, and 6]
The reel main portion 19 and the upper flange plate 10 are formed and joined together by the parts forming and assembling apparatus 1 in the following manner.

(b-7-a, molding) [Figure 1] First, the mold block 54 is clamped as described above, and then the molten resin having a white color or a color close to white is reeled through the hot runner 35. The transparent molten resin is injected into the cavity 55 for molding the main part, and the transparent molten resin is also injected into the cavity 56 for molding the upper flange plate via the semi-hot runner 37 and the submarine gate 36.

As a result, the cavities 55 and 56 are filled with molten resin, and the molten resin is cooled and solidified to form the reel main portion 19 and the upper flange plate 1o separately.

(b-7-b, mold opening, holding upper flange plate) [5th
5(A) and 5(B) After the molding of the reel main part 19 and the upper flange plate 10 is completed, the slide plates 38 and 39 are respectively moved to the separated position, and then the movable side Mold 42
is moved backwards and the mold is opened.

At this time, the reel main part 19 is held by the core 50 by shrinkage after molding, and also,
The upper flange plate 10 is also held by the protrusions 52 and 53, 53 in the cavity forming recess 51 in such a manner as to tighten them due to shrinkage after molding, and the cavity forming plate 10, which had previously constituted half of the cavity 56 for forming the flange plate, is Since the recesses 40 and 40' of the recess 41 escape in the vertical direction, the reel main portion 19 and the upper flange plate 10 move rearward together with the movable mold plate 46 and are pulled out from the fixed mold plate 28. .

Then, at the same time as or immediately after the start of such mold opening operation, the piston rods 59, 59, . . . of the air cylinders 57, 57, . , ... are attracted to the upper flange plate 10, and then, at a predetermined timing, the piston rod 59
．． 59, . . . are returned to their original positions.

Therefore, the upper flange plate 10 has suction cups 60, 60,...
The bow is punched out from the movable side template 46 and positioned at the rear end of the working recess 32.

That is, when the mold block 54 has been completely opened,
The reel main portion 19 is held by the movable mold plate 46, and the upper flange plate 10 is held inside the fixed mold plate 28.

(b-7-c, Rotation of the movable mold)
be rotated.

As a result, the reel main part 19 held by the movable mold plate 46 faces the upper flange plate 10 from the rear, and the spring abutting protrusion 15 of the reel main part 19 and the insertion hole 17 of the upper flange plate 10 In addition, the connecting protrusion 16 of the reel main part 19
．． 16 and the coupling holes 18, 18 of the upper flange plate 10 are coaxially opposed to each other.

The cavity forming recess 51 of the movable mold plate 46 is opposed to the cavity forming recess 30 of the fixed mold plate 28.

(b-7-d, Overlapping and coupling of the main part of the reel and the upper flange plate) [Fig. 5 (D), Fig. 6] Next, ultrasonic vibration is transmitted to the horn 61 of the ultrasonic welding machine. At the same time, the movable mold 42 is moved forward.

This stroke is made with approximately the same stroke as the one used when clamping the mold.

Then, the two coupling protrusions 16.16 of the reel main part 19 are inserted into the coupling holes 18.18 of the upper flange plate 10, and their tips 16a, 16a protrude forward from the coupling holes 18.18. The protrusion 15 is inserted into the insertion hole 17 of the flange plate 10. That is, the reel main portion 19 and the flange plate 10 are overlapped.

Then, the tips 16a, 16a of the coupling protrusions 16.16 are brought into contact with the contacts 64, 64 of the horn 61 and melted, and are pressed relatively backward to increase their diameter.

Therefore, the tips 16a, 16a of the coupling projections 16.16
and the upper surface of the hub 12 are connected to the coupling hole 18 of the upper flange plate 10.
．． The opening edge of 18 is sandwiched from the plate thickness direction, and as a result, the reel main part 19 and the upper flange plate 10
are integrally combined.

(b-7-e, mold release) [Figure 5 (E)] And after this,
Suction cup 60.60. ... is released, the movable side mold 42 is moved backward, and the eject plate 65 is moved forward from this state, and its eject pins 67, 67 press the reel main part 19, and this According to
The reel main part 19 and the upper flange plate 10 are the movable template 4
The mold is released from 6.

When the mold release is completed, the eject plate 65 is retracted and the rotary shaft 45 is rotated to return the movable mold 42 to the molding orientation, and the mold block 54 is moved again.
The mold clamping is carried out.

(G. Effects of the Invention) As is clear from the above description, the parts molding and assembly apparatus of the present invention includes a mold block having two cavities for separately molding two parts to be combined with each other; A holding mechanism that holds one of the molded parts in the mold block, an overlapping mechanism that overlaps the other molded part onto the one part, and a fusion joining mechanism that melts and joins the two parts. It is characterized by

Therefore, according to the parts molding and assembling apparatus of the present invention, the molding and joining of two parts can be performed continuously in one apparatus even though the molding is performed separately, so the materials for each part are limited. The materials of each part can be molded neatly without mixing, the equipment cost is low, and the manufacturing efficiency is high, so it can be manufactured at low cost. High accuracy can be obtained by combining

In the above embodiment, the holding mechanism for holding one of the two parts molded by the mold block is provided with a suction cup that is moved by an air cylinder, and
The mechanism for stacking the other part on one part is to make the movable side mold of the mold block rotatable relative to the stationary side mold, and to overlap the movable side mold with the mold block opened. The above-described overlapping is performed by rotating the mold and bringing the movable side mold into contact with the stationary side mold, and furthermore, an ultrasonic welding machine is used as the fusion joining mechanism for fusion joining the two parts. However, these mechanisms are merely examples of implementation, and do not mean that the holding mechanism, stacking mechanism, and fusion bonding mechanism of the present invention are limited to such structures.

In the above embodiment, the parts molding and assembling apparatus of the present invention was applied to a parts molding and assembling apparatus for a tape reel for a videotape cassette, but the present invention is not limited to such an example of application, and can be applied to each composite. It can be applied to parts molding and assembly equipment for various parts made by combining two parts molded using a mold using resin as a material. Regarding the members, it is also conceivable that two of the three or more parts are molded and joined using the parts molding and assembling apparatus of the present invention.

[Brief explanation of drawings]

1 to 9 show an example of an embodiment in which the parts molding and assembling apparatus of the present invention is applied to a parts molding and assembling apparatus for a tape reel for a videotape cassette, and FIG. 1 is a central horizontal cross-section of the mold in a closed state. Figure 2 is a perspective view of the fixed side mold,
Figure 3 is a perspective view of the movable side mold, Figure 4 is a front view of the stationary side mold, and Figure 5 is a horizontal view showing the operations from mold opening to mold release in order from (A) to (E). Cross-sectional view, Figure 6 is Figure 5 (
D), an enlarged sectional view taken along the line ■-vr, and FIGS. 7 to 9 show an example of a videotape cassette, FIG. 7 is a partially exploded schematic perspective view of the whole, and FIG. 9 is an exploded perspective view of a tape reel, FIG. 10 is a vertical sectional view showing an example of a tape reel for a video tape cassette, and FIG. 11 is a view of a conventional tape reel. It is a conceptual diagram showing a manufacturing process. Explanation of symbols 1... Parts molding and assembly device, 10... (One) part, 19... (Other) part, 42.45... Layering mechanism, 54... Mold block, 55.56... Cavity, 57.60... Holding mechanism, 61... Melting bonding mechanism. Partially exploded schematic perspective view of video tape cassette. ...An exploded perspective view of the (other) component tape reel Fig. 9 Conceptual diagram showing the manufacturing process of the tape reel ((!unexplored)'%
S1

Claims (1)

[Scope of Claims] A mold block having two cavities for separately molding two parts to be combined with each other; a holding mechanism for holding one of the molded parts within the mold block; A parts forming and assembling device comprising: a superimposing mechanism for superimposing another part on one part; and a melting and joining mechanism for melting and joining the two parts.