JPH01280516A - Compression molding device - Google Patents

Abstract

PURPOSE:To mold a molded product made of synthetic resin such as a vessel lid or its resembling matter at a high speed, high quality and a low cost, by providing a specific rotary compression molding device, material supply device and molded product carrying-out device. CONSTITUTION:A rotary compression molding device is provided with a rotary supporting body 12 which is turned at a fixed speed centering around the central axis extending vertically. The rotary supporting body 12 is fitted with a plurality of molding tool devices 14 at equal intervals in a circumferential direction of the same. While the molding tool devices 14 are in a material filling sphere as shown by a symbol A, a synthetic resin material is supplied within the molding tool device 14 which is in an open state through a material supply device 4. The molding tool device 14 is closed gradually while the same is being passed through a molding sphere as shown by a symbol B and a synthetic resin material is compression-molded into a molded product of a necessary form. After passing through a cooling sphere C, the molding tool device 14 is opened gradually while the same is being moved toward a discharge sphere of the molded product. The molded product separated from the molding tool device 14 is carried out through the rotary compression molding device 2 with a molded product carrying-out device 6, in a discharge sphere D of the molded product.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a compression molding apparatus, more specifically, but not exclusively, suitable for molding container lids or the like at high speed and with high efficiency. This invention relates to compression molding equipment.

BACKGROUND ART As is well known to those skilled in the art, there has recently been a tendency for various forms of synthetic resin container lids to be used in place of metal container lids. Synthetic resin container lids are generally molded by injection molding or compression molding methods, but for industrial and commercial success, the speed, quality and cost of molding metal container lids can be challenged. It is important to mold synthetic resin container lids at a sufficiently high speed, high quality, and low cost.

However, conventional molding apparatuses have not been able to satisfy the above requirements, which has hindered the realization of synthetic resin container lids that have sufficient marketability to compete with metal container lids.

<Object of the Invention> The present invention has been made in view of the above facts, and its purpose is to make a container lid a molded product made of synthetic resin such as a similar product,
An object of the present invention is to provide a compression molding apparatus capable of molding at a sufficiently high speed, high quality, and low cost.

Other objects of the invention will become apparent from the subsequent detailed description of preferred embodiments of the compression molding apparatus of the invention with reference to the accompanying drawings.

<Summary of the Invention> According to the present invention, a compression molding apparatus that achieves the above object includes a rotary support mounted rotatably about a central axis, and a rotary support mounted at intervals in the circumferential direction. a plurality of mold means, each having an upper mold assembly and a lower mold assembly cooperating with each other, at least one of the upper mold assembly and the lower mold assembly being connected to the other; 1. a forming die means which is movable with respect to a rotational direction; a rotational drive source for sequentially positioned material reservoirs for rotationally driving the rotational support in a predetermined direction; and a mold opening/closing means for moving at least one of the upper mold assembly and the lower mold assembly in a predetermined manner with respect to the other in accordance with the movement of the mold means↓the material loading A material supply means for supplying a synthetic resin material to the mold means in the area; and a molded article delivery means for transporting the molded article from the mold means in the synthetic curios discharge area. A compression molding apparatus is provided.

In a preferred embodiment of the present invention, the material supply means,
Various improvements have been made to the mold means and the molded article delivery means in the rotary compression molding means.

<Preferred Embodiments of the Invention> Hereinafter, preferred embodiments of the compression molding apparatus constructed according to the present invention will be described in detail with reference to the accompanying drawings.

To explain with reference to FIG. 1, the illustrated compression molding apparatus is as follows:
It is provided with a rotary compression molding means, generally designated by number 2, a material supply means, generally designated by number 4, and a molded product delivery means, generally designated by number 6.

The rotary compression molding means 2 is a rotary support body that is rotated at a predetermined speed in the direction indicated by an arrow 10 about a central axis 8 that extends substantially vertically (in FIG. 1, extends substantially perpendicularly to the plane of the paper). It is equipped with 12. A plurality of (twelve in the illustrated case) mold means 14 are mounted on the rotary support 12 at equal intervals in the circumferential direction. As will be explained in detail later, each of the mold means 14 is comprised of an upper mold assembly and a lower mold assembly, and includes a rotating support 1
It can be opened and closed as required while being moved through the circular transport path in conjunction with the rotation of 2.

In the illustrated embodiment, the mold means 14 is in the open state when the mold means 14 is in the material loading area indicated by the symbol A.
A synthetic resin material is supplied from the material supplying means 4 into the container. Next, while the mold means 14 passes through a molding area indicated by the symbol B, the mold means 14 is gradually opened, and thus the synthetic resin material is compression molded into a molded article of a desired shape. While the mold means 14 passes through the cooling zone indicated by the symbol C, the mold means 14 is maintained in a closed state, and the compression-molded molded article is cooled. While the mold means 14 moves from the downstream end of the cooling zone C toward the molded article discharge area indicated by the reference numeral, the mold means 14 is gradually opened, and in the molded article discharge area, the mold The molded article separated from the means 14 is carried out from the rotary compression molding means 2 by the molded article carrying means 6.

Each component of the compression molding apparatus as described above will be described in detail below.

The rotary compression molding means 2 will be explained with reference to FIG. 2. The rotary compression molding means 2 shown is held in place by a suitable support structure (not shown). It has a supported substantially horizontal stationary lower substrate 16. This lower board 1
6, a plurality of support columns 1 are arranged at intervals in the circumferential direction.
8 (only one of which is shown in Figure 2) is planted. A substantially horizontal stationary upper substrate 20 is fixed to the upper ends of these columns 18.

A substantially cylindrical stationary hollow column 22 extending substantially vertically is disposed at the center of the lower substrate 16 .

Such hollow strut 22 has a flange 24 at its lower part,
The hollow support 22 is fixed to the lower substrate 16 by fixing the flange 24 on the lower substrate 16. The portion of the hollow support 22 below the flange 24 is
It extends downwardly through an opening formed in the lower substrate 16. A stationary hollow tube 26 of relatively small diameter is arranged concentrically within the hollow strut 22 . The lower end of the hollow tube 26 is supported by a suitable support structure (not shown). A stationary portion 2 is provided at the upper end of the hollow support 22.
8 and the rotating part 3 rotatably supported on the stationary part 28.
A hollow rotary joint 32, known per se, consisting of 0 is fitted. A container 38 having two chambers 34 and 36 is fixed on the hollow rotary joint 32 . The hollow tube 26 extends through the hollow rotary joint 32 and extends into a container 38.
The chamber 34 is connected to the chamber 34. The lower end of the hollow tube 26 is connected to a source 40 of cooling medium, which may be ordinary water. The cooling medium supplied from the supply source 40 is supplied to the hollow tube 26
through a plurality of tubes 42 (only one of which is shown in FIG. 2) extending from chamber 34 to each of the mold means 14 described in more detail below. The mold means 14 is fed. Molding mold means 1
The cooling medium flowed through each of the tubes 44 (only one of which is shown in FIG. 2) extends from each of the mold means 14 to the chamber 36 of the container 38.
through, into the chamber 36 of the container 38, and then through the hollow rotary joint 32 into the hollow column 22, more specifically into the annular space existing outside the hollow tube 26, flowing downward, and then into the hollow It is discharged through a discharge pipe (not shown) connected to the lower end of the column 22.

The rotary support 12 is rotatably mounted on the outside of the hollow support 22 by means of a lower bearing 45 and an upper bearing 46. A mold means mounting block 48 is secured to each of the twelve substantially flat outer surfaces of the rotating section. And the mold means mounting block 4
8 is fitted with mold means 14, which will be described in detail later.

An input gear 5o is fixed to the outer periphery of the lower end of the rotary support 12, and the input gear 5o is connected to a rotary drive source 52, which may be an electric motor, via an appropriate transmission mechanism (not shown).
The drive is connected. (Then, the rotation support 12
The twelve mold means 14 attached thereto are rotated by a rotation drive source 52 in a predetermined direction (that is, the direction indicated by arrow 1o in FIG. 1) at a predetermined speed.

An annular support block 54 is fixed on the lower substrate 16, and a stationary annular cam block 56 is fixed on the annular support block 54. This annular cam block 56 includes three annular cams 58, 60 and 6.
2 (as will be explained later, these cams 58, 60 and 62 are engaged by cam followers provided on the lower mold assembly of the mold means 14).

Further, a stationary annular cam block 64 is fixed to the lower surface of the upper substrate 20, and this annular cam profile 4
has three annular cams 66, 68. (As will be explained in detail later, these cams 66, 68 and 70 are engaged by cam followers provided on the upper mold assembly of the mold means 14.) Now referring to each of the mold means 14, in the illustrated embodiment, each of the mold means 14 is shown in FIG. 2
It is composed of a lower mold assembly 74 shown by a dotted chain line.

Referring to FIG. 3, the illustrated upper mold assembly 72
includes an outer support member 76 and an inner support member 78. The outer support member 76 is composed of a prismatic column having a substantially square cross section. The outer support member 76 is slidably mounted on the mold means mounting block 48 in a substantially vertical direction. More specifically, the mold means mounting block 48 has a mounting portion 80 extending radially outward at its upper end, and the mounting portion 80 has a mounting portion 80 that extends substantially vertically and has an open radial outer surface. A mounting channel 82 is formed. The mounting channel 82 has a cross-sectional shape that corresponds to the cross-sectional shape of the outer support member 76 . The outer support member 76 is housed in the mounting channel 82, and a cover plate 84 is then secured to the outer surface of the mounting portion 80 to cover the outer surface of the mounting channel 82, thus allowing the outer support member 76 to slide freely in a substantially vertical direction. It will be installed. The lower end of the connecting member 86 is fixed to the outer surface of the upper end of the outer support member 76 . A substantially horizontally extending shaft 88 is fixed to the upper end of the substantially vertically extending connecting member 86, and a cam roller 90 constituting a cam follower is rotatably attached to the inner end of this shaft 88. ing. The cam roller 90 is engaged with an annular cam 66 formed on the stationary annular cam block 64. When mold means 14 is rotated in the direction indicated by arrow 10 in FIG.
The outer support member 76 is moved up and down as required. A through hole 92 that extends substantially vertically and has a circular cross section is formed in the center of the outer support member 76 . The inner support member 78 is composed of a cylinder having an oval cross-sectional shape corresponding to the cross-sectional shape of the through-hole 92, and is slidable in a substantially vertical direction by being inserted into the through-hole 92. is attached to the outer support member 76. The rotation of the inner support member 78 within the through hole 92 is as follows:
This is blocked by a key 98 inserted across a keyway 94 formed on the outer surface of the inner support member 78 and a keyway 96 formed on the inner peripheral surface of the outer support member 76 . A two-prong structure 100 is formed at the upper end of the inner support member 78, and a substantially horizontally extending shaft 102 is fixed to the two-prong structure 100. Cam rollers 104 and 106, which constitute cam driven nodes, are rotatably mounted on this shaft 102.

Cam rollers 104 and 106 are engaged with annular cams 68 and 70, respectively, formed on the stationary annular cam block 64. The annular cam 68 and its cooperating cam roller 104 and the annular cam 70 and its cooperating cam roller 106 support the inner support member 78 as the mold means 14 is rotated in the direction indicated by the arrow IO in FIG. move up and down as required.

A mold member 10 is provided at the tip or lower end of the inner support member 78.
8 and 110 are installed (these mold members lO8
and 110 define the inner surfaces of the top wall and skirt wall of the container lid, as will be described in detail later. ) To be more specific, the lower part of the inner support member 78 has a hole 11 that is open downward.
2 is formed.

A relatively large diameter portion 114 located at the bottom of this hole 112
A female thread is formed on the inner peripheral surface. - side, mold member 1
08 has a generally cylindrical shape as a whole, and a female thread is formed on the outer peripheral surface of a relatively small diameter portion 116 located at the upper end. The mold member 10 is secured to the lower end of the inner support member 78 by threading the portion 116 located at its upper end into the portion 114 of the hole 112. A sealing member 118 is disposed within the hole 112 and is located immediately above the upper end of the mold member 108.
A portion of the hole 112 above the seal member 118 defines a cooling medium flow space 120 . A coolant flows into the coolant flow space 120 from the pipe 42, and the coolant flows into the coolant flow space 120.
20 is allowed to flow out through tube 44. A through hole 122 is formed in the center of the mold member 108 . The upper half of the through hole 122 has a relatively small diameter, the lower half has a relatively large diameter, and a downwardly directed shoulder 124 exists in the boundary area between the two. On the other hand, the mold member 110 has the main portion 1
26 and a cylindrical mounting portion 1 extending upward from this soil portion 126.
It has 28. The cross-sectional shape of the mounting portion 128 of the mold member 110 corresponds to the cross-sectional shape of the lower half of the hole 122 of the mold member 108. By inserting it into the lower half, it is slidably mounted in a substantially vertical direction. Mold member 1
In the lower half of the mold member 110, elongated slots 130 extending vertically are formed at a plurality of cylinders spaced apart in the circumferential direction.
Pins 132 projecting outward in the radial direction are fixed at a plurality of positions spaced apart in the circumferential direction. pin 13
The radially outer portion of the mold member 11 is positioned within the slot 130 and thus the mold member 11 relative to the mold member 108.
The vertical movement of 0 is between the upper limit position where the pin 132 touches the upper end of the slot 130 and the upper limit position where the pin 132 contacts the upper end of the slot 130.
0 (i.e., the position shown in FIG. 3). .

The shoulder (1) present in the hole 122 of the mold member 108
24 and the mounting portion 128 of the mold member 110, there is a 2
Spring means 134 are provided for elastically biasing the mold member 110 to the lower limit position relative to the mold member 108.

In the illustrated embodiment, a heat pipe 136 is further provided to cool the mold member 110 (and the mold member 108) sufficiently effectively. The endothermic or lower end of the heat pipe 136 , which may be of a known form per se, is inserted into and fixed to the mold part 110 . - On the other hand, a heat dissipation end, that is, an upper end of the heat pipe 136 is accommodated in the cooling medium flow space 120 so as to be movable up and down. The glands that are transmitted from the synthetic resin material to be compression molded to the mold member 110 (and the mold member 108) are absorbed by the heat absorption end of the heat pipe 136, and then flowed through the cooling medium flow space 120 from the heat radiation end of the heat pipe 136. Heat is dissipated h to the flowing cooling medium, thus mold member 110 (
and mold member 108) are cooled sufficiently effectively. In this regard, the following facts should be noted. That is,
Because the mold member 110 is slidable relative to the mold member 108 and thus relative to the inner support member 78 and is relatively small in size, it is possible to flow the cooling medium directly thereto with sufficient effectiveness. It is extremely difficult, if not impossible, to cool the However, in the specific example shown, the mold member 11 is heated by using the heat pipe 136.
0 cooling is carried out sufficiently effectively.

On the other hand, mold members 138 and 140 are attached to the tip or lower end of the outer support member 76 (these mold members 138 and 140 are located at the lower end of the skirt wall of the container lid, as will be described in detail later). defining the outer surface of the pilfer-proof hem).

More specifically, at the lower end of the outer support member 76, cylindrical protrusions 1 and q2 are formed that protrude downward. The inner diameter of the protrusion 142 is somewhat larger than the outer diameter of the mold member 108 fixed to the lower end of the inner support member 78, and a female thread is formed on the inner peripheral surface of the protrusion 142. The mold member 138 has a generally cylindrical shape as a whole, and a female thread is formed on the outer peripheral surface of a relatively small diameter portion 144 in the upper half thereof. Such a mold member 138 is
4 into the protrusion 142, it is fixed to the lower end of the outer support member 76. As shown in FIG. 3, the mold member 138 is located outside the mold member 108 fixed to the lower end of the inner support member 78.
The inner diameter of the mold member 8 and the outer diameter of the mold member 108 are made to have substantially the same dimensions. The outer diameter of the lower half of the mold member 138 is made substantially the same as the outer diameter of the protrusion 142.

The mold member 140 is disposed outside the mold member 138, and is attached to the outer support member 76 so as to be slidable over a predetermined range in the direction of the longitudinal axis of the outer support member 76, that is, in the lead direction. A circular flange 146 is formed at the lower end of the outer support member 76 and a corresponding mold member 140
A circular flange 148 is also formed at the upper end. The circular flange 148 of the mold member 140 has a plurality of holes 150, for example, three vertically penetrating holes spaced apart from each other in the circumferential direction.
(only one of which is shown in FIG. 3) are formed. The main shaft of a connecting pin 154 having an enlarged head 152 at the lower end and a female thread formed at the upper end is inserted into the hole 150, and the upper end of the connecting pin 154 is inserted into the circular flange of the outer support member 76. The mold member 140 is attached to the outer support member 76 by being screwed into the mold member 146 .

As can be easily understood by referring to FIG.
The mold member 140 is formed at a lower limit position, that is, a protruding position (the position shown in FIG. 3) where the lower surface of the circular flange 148 abuts the enlarged head 152 of the connecting pin 154, and at the inner peripheral surface of the lower end thereof. The outer support member 76 and the mold member 13 fixed thereto are connected to the upper limit position, that is, the retracted position, where the radially inward projecting portion abuts the lower surface of the mold member 138.
It is slidable relative to 8 in the vertical direction. Spring means 156 (a third spring means 156 (of which only one is shown in the figures) are provided, the spring means 156 being able to maintain the mold member 140 in the protruding position (i.e., the position shown in FIG. 3).
elastically biased. In connection with the mold member 140, in the illustrated embodiment there is also provided a rise prevention means for selectively preventing the mold member 140 from rising from the extended position to the retracted position.

This rise prevention means includes a restricted member 158 in the form of a substantially annular plate disposed outside the mold member 140. The restricted member 158 is prevented from rising by a plurality of protrusions 160 formed on the outer peripheral surface of the mold member 140 at intervals in the circumferential direction, and is also prevented from rising by a stop screwed onto the outer peripheral surface of the lower end of the mold member 140. Lowering is prevented by nut 162,
Thus, although it cannot move vertically with respect to the mold member 140, it can rotate around the mold member 140.

Referring to FIG. 4 as well as FIG. 3, the restricted member 158 is formed with a protrusion 164 that protrudes outward in the radial direction, and a pin 166 that extends in the vertical direction is fixed to the protrusion 164. has been done.

On the other hand, a pin 168 extending radially outward is fixed to the circular flange 148 of the mold member 140. As shown in FIG. 3, a spring means 170, which may be a torsion coil spring, is interposed between the mold member 140 and the restricted member 158. This spring means 170 is connected to the mold member 140
3, the restricted member 158 is elastically biased counterclockwise when viewed from above in FIG.
66 resiliently maintains the restricted member 158 in a first angular position in which it abuts the pin 168, ie, the angular position shown in FIGS. 3 and 4. As clearly shown in FIG. 4, three recesses or escape parts 172 are formed at intervals in the circumferential direction on the upper surface of the restricted member 158.
58 is in the first angular position, each of the three relief portions 172 engages the enlarged head 15 of the connecting pin 154.
2 and therefore, by housing the enlarged head 152 within the relief 172, the restricted member 158
can be raised with the mold member 140 relative to the outer support member 76, so that the mold member 140 can be raised to the retracted position. On the other hand, a cam follower roller or cam follower means 174 is rotatably attached to the lower end of the pin 166, and as shown in FIG.
On the downstream side of the cooling zone C as seen in the rotational direction 10 of the rotary compression molding means 2, there is provided a stationary cam means 176 that acts on the cam driven means 174 (this stationary cam means 17
6 is fixed to the lower substrate 16 via a suitable support member). As the mold means 14 rotates downstream of the cooling zone C, the stationary cam means 176 acts on the cam follower means 174, thus causing the restricted member 15 to
8 is rotated clockwise, for example, by about 30 degrees when viewed from above in FIG. 3, against the elastic biasing action of the spring means 170, and brought to the second angular position. As a result, the relief portion 172 formed on the upper surface of the restricted member 158 becomes misaligned with the enlarged head 152 of the connecting pin 154, and the portion between the relief portions 172 on the upper surface of the restricted member 158, i.e. The contact portion 178 is connected to the connecting pin 15
It is located opposite the enlarged head 152 of No. 4. Therefore, as can be easily understood by referring to FIGS. 3 and 4, the abutting portion 178 of the restricted member 158 comes into contact with the enlarged head 152, thereby causing the restricted member 158 to rise. This prevents the mold member 140 from moving into the protruding position (
3) to the retracted position is prevented.

Next, referring to FIG. 5, the lower mold assembly 74 will be described. The illustrated lower mold assembly 74 includes the outer support member 18
0 and an inner support member 182. Referring also to FIG. 2, the mold means mounting block 48 has the mounting portion 80 projecting outward in the radial direction at its upper end.
(The mounting portion 80 includes the upper mold assembly 7 as described above.
2), it also has a mounting portion 183 that extends outward in the radial direction at its lower end. This mounting part 183
A mounting channel 184 is formed therein which extends substantially vertically and has an open radially outer surface. The cross section of the mounting channel 184 may be substantially square. Mounting part 18
A cover plate 186 is fixed to the radially outer surface of the mounting channel 184, thus at least partially covering the open radially outer surface of the mounting channel 184. Continuing the explanation with reference to FIG. 5, the outer support member 180 is composed of a prismatic column having a cross-sectional shape corresponding to the cross-sectional shape of the mounting channel 184, and the upper end thereof is It is slidably fitted within the mounting channel 184. An upper end portion of a continuous member 188 is fixed to the outer surface of the outer support member 180. A connecting member 188 that hangs substantially vertically downward.
A substantially horizontally extending shaft 190 is fixed to the lower end of the shaft 190, and a cam roller 192 constituting a cam follower is rotatably mounted on the outer end of this shaft 190.

This cam roller 192 is engaged with an annular cam 58 formed on the stationary cam block 56.

As mold means 14 is rotated in the direction indicated by arrow 10 in FIG. 1, annular cam 58 and cam roller 192 cooperate to raise and lower outer support member 180 as desired. Inside the mounting channel 184 is an outer transmission member 19.
4 is also provided. This outer transmission member 194 is composed of a prism having a cross-sectional shape corresponding to the cross-sectional shape of the mounting channel 184.
It is slidably housed inside.

A spring means 196 is interposed between the outer support member 180 and the outer transmission member 194. Spring means 196, which may consist of a plurality of circumferentially spaced helical compression springs (two of which are shown in FIG. 5), vertically orient outer transmission member 194. elastically biased upward in the direction. The outer transmission member 194 is formed with a hanging portion that hangs down beyond the spring means 196, and an annular overhang portion 198 that extends radially outward is formed at the lower end of the hanging portion, while the outer support member 180
A retaining ring 200 is fixed to the inner circumferential surface of the upper end, and the annular projecting portion 198 comes into contact with the retaining ring 200, thereby restricting vertical upward movement of the outer transmission member 194. A substantially cylindrical mold member 202 is fixed to the tip or upper end of the outer transmission member 194 (this mold member 202 defines the outer surface of the main part of the skirt wall of the container lid, as will be described in detail later). .

A substantially cylindrical member 204 is fixed to the outer periphery of the mold member 202 . A spiral cooling medium flow groove 206 is formed on the inner peripheral surface of this member 204. A cooling medium is caused to flow into the cooling medium flow groove 206 from the pipe 42,
The cooling medium flowing through the cooling medium flow grooves 206 is allowed to flow out through the pipe 44, thus cooling the mold member 202.

Through holes 208 and 210, which extend substantially vertically and have a circular cross section, are formed in the center of the outer support member 180 and the outer transmission member 194. The upper half of the inner support member 182 has a circular cross section corresponding to the cross-sectional shape of the through holes 208 and 210, and
08 and 210 in a slidable manner.

Inner support member 182 within through holes 208 and 210
Rotation is prevented by a key 216 inserted across a keyway 212 formed on the outer peripheral surface of the inner support member 182 and a keyway 214 formed on the inner peripheral surface of the outer support member 180. A two-prong structure 218 is formed at the lower end of the inner support member 182.
A substantially horizontally extending shaft 220 is fixed to the. Cam rollers 222 and 224, which constitute a cam driven joint, are rotatably mounted on this shaft 220.

Cam rollers 222 and 224 are engaged with annular cams 60 and 62, respectively, formed on the stationary annular cam block 56. Annular cam 60 and cooperating cam roller 222 and annular cam 62 and cooperating cam roller 224 press against inner support member 182 as mold means 14 is rotated in the direction indicated by arrow 10 in FIG. move up and down as required. Outer transmission member 1
Inside the through hole 210 formed at 94 are two members having a circular cross-sectional shape corresponding to the cross-sectional shape of the through hole 210, namely, a first inner power transmission member 226 and a second inner power transmission member. 228 is slidably accommodated. The first inner transmission member 226 is formed with a through hole having an upper portion 230 with a relatively large diameter and a lower portion 232 with a relatively small diameter. The shaft portion of a port 234 whose head is accommodated in the upper portion 230 of the through hole passes through the lower portion 232 of the through hole, and the lower end portion of the port 234 is screwed into the upper portion of the inner support member 182. . A spring means 236 is interposed between the upper end of the inner support member 182 and the lower end of the first inner transmission member 226, which first elastically biases the inner transmission member 226 upward in the vertical direction. Vertical upward movement of the first inner transmission member 226 is limited by an upwardly facing shoulder located at the boundary between the upper portion 230 and the lower portion 232 of the through hole abutting against the head of the port 234. be done. As will become clear from the following description, the spring means 236 applies a considerable force to the first inner transmission member 226.
elastically biased upward in the vertical direction,
From this point of view, it is convenient to construct the spring from a plurality of laminated disc springs as shown in the figure. A female thread is formed on the inner surface of the upper end of the upper part 230 of the through hole of the first inner power transmission member 226, and correspondingly, a female thread is formed on the outer peripheral surface of the lower end of the second inner power transmission member 228. There is a small diameter portion 238 in which a female thread is formed, and this small diameter portion 238
By screwing into the upper part 230 of the through hole,
A lower end portion of a second inner power transmission member 228 is fixed to an upper end portion of the first inner power transmission member 226 . At the tip or upper end of the second inner transmission member 228, the outer transmission member 194
A mold member 240 located inside the mold member 202 fixed to the upper end of the mold member 240 is fixed (this mold member 240 is
As will be described in detail later, this defines the outer surface of the top wall of the container lid).

At the upper end of the second inner transmission member 228, there is a small diameter portion 242 with a female thread formed on the outer circumferential surface, and correspondingly, at the lower end of the mold member 240 there is a female thread formed on the inner circumferential surface. There is a hole 244 in which a lower end of the mold member 240 is formed.
The mold member 240 is fixed to the second inner power transmission member 228 by being screwed into the upper end of the second inner power transmission member 228 . The upper half of the second inner transmission member 228 and the mold member 2
A cooling medium flow space 246 is provided in cooperation with the lower half of the cooling medium 40.
A blind hole is formed that defines the A tube 248 is fixed concentrically within the cooling medium flow space 246 .

A cooling medium is caused to flow from the tube 42 into the tube 248,
Such cooling medium rises within tube 248 and
The cooling medium flows into the flow space 246 through an opening 250 formed in the upper end and then exits through the tube 44, thus cooling the mold member 240. As will become clear from the following description, the inner peripheral surface of the mold member 202 fixed to the tip of the outer transmission member 228 has a large number of protrusions extending in the axial direction on the outer surface of the main portion of the skirt wall of the container lid. A large number of vertically extending grooves are formed to define the second inner power transmission member 2.
A large number of protrusions are formed on the outer circumferential surface of the mold member 240 fixed to the tip of the mold member 202, and as the grooves and the protrusions partially engage with each other, the mold member 240 is fixed to the tip of the mold member 202. 240 is prevented from rotating.

The illustrated mold means 14, comprising an upper mold assembly 72 and a lower mold assembly 74 as described above, is mounted on the rotating support 12.
While being moved through the circular conveying path in conjunction with the rotation of the container lid 252, the container lid 252 is opened and closed as required to place the container lid 252 in an inverted position (i.e., in an upright position as shown in FIG. 6). Compression molding is performed in a state where the top and bottom are reversed).

Before explaining the function of the mold means 14, the container M252 will be described with reference to FIG. 256. An annular protrusion 258 is formed on the inner surface of the top wall 254. The skirt wall 256 has a relatively thick green portion 260 and a relatively thin pilfer-proof hem 262.

The inner surface of the main portion 260 of the skirt wall 256 has a female thread 26.
4 is formed. An annular protrusion 266 having a substantially horizontal lower surface is formed at the lower end of the outer surface of the main portion 260 . Further, the annular protrusion 26 on the outer surface of the main portion 260
In the region above 6, a large number of anti-slip protrusions 268 are formed at intervals in the circumferential direction and extend in the axial direction. A plurality of flap pieces 270 are formed on the inner surface of the pilfer-proof hem 262 at intervals in the circumferential direction and project radially inward.

According to the illustrated embodiment of a π compression molding apparatus constructed in accordance with the present invention, container lid 252 is compression molded as described above, but after compression molding, container lid 252 is further subjected to the following treatments. Ru. That is, the main portion 26 of the skirt 9256
0 and the pilfer-proof hem 262 has a sixth
As shown by two-dot chain lines in the figure, a plurality of slits (cut grooves) 272 are formed that extend in the circumferential direction at slight intervals in the circumferential direction, and thus the bridge portions 27 that remain between the slits 272 are formed.
A weakened line consisting of 4 is generated. Also, the top wall 2
A sealing member 276 made of a suitable synthetic resin material different from the synthetic resin material of the container lid 252 itself is provided within the annular protrusion 258 on the inner surface of the container lid 252 . The container lid 252 as described above is merely an example, and therefore, detailed explanation of the structure and function of the container lid 252 itself will be omitted in this specification.
Regarding 52 itself, if necessary, for example, JP-A-56-
74445, JP-A-58-30949, JP-A-58-51116, etc.).

Next, the operation of the mold means 14 will be summarized and explained. 7th
7-A, 7-B, 7-C, and 7-D show the vertical movement of the outer support member 76 of the upper mold assembly 72 by the cooperation of the annular cam 66 and the cam roller 90, and the annular shape. cam 6
8 and the cam roller 104 and the annular cam 70 and the cam roller 106 cooperate to raise and lower the inner support member 78 of the upper mold assembly 72, the annular cam 58 and the cam roller 1.
Outer support member 18 of lower mold assembly 74 in cooperation with 92
FIG. 4 is a cam diagram showing the vertical movement of the inner support member 182 of the lower mold assembly 74 due to the vertical movement of the annular cam 60 and the cam roller 222, and the vertical movement of the inner support member 182 of the lower mold assembly 74 due to the cooperation of the circular cam 60 and the cam roller 224; 8 along with such a cam diagram and FIG.
Referring to Figures -A to 8-F, when the mold means 14 is located in the material loading area A shown in Figure 1,
As shown in FIG. 8-A, the upper mold assembly 72 and the lower mold assembly 74 are separated in the vertical direction, and in this state, the material supply means 4 (this material supply means 4 A suitable synthetic resin material 278, which may be polyethylene, polypropylene, etc., is supplied in a softened and molten state in a required amount to the mold means 14, more specifically onto the mold member 240 of the lower mold assembly 74, from a material (to be described in detail later). Next, the mold means 1
4 rotates in the direction shown by arrow 10 in FIG. At the same time, the outer support member 180 and the inner support member 182 of the lower mold assembly 74 are gradually raised. While the mold means 14 rotates to the position shown at B-1 in FIG. , due to this, the mold member 140 of the upper mold assembly 72 is forced against the outer support member 76 and the mold member 138 fixed thereto against the elastic biasing action of the spring means 156 (FIG. 3). The projecting position (No. 8-A)
(see figure) to the retracted position (see figure 8-B). During rotation of the mold means 14 from the position shown at B-1 in FIG.
In response to the lowering of mold members 8 and 140, outer support member 180 of lower mold assembly 74, and thus mold member 202, is lowered, such that mold members 138 and 140 and mold member 202 are lowered in position B-2. The position is as shown in Figure 8-B. On the other hand, the mold means 14 moves from position B-1 to position B-
2, the inner support member 182 of the lower mold assembly 74, and thus the mold member 240, is maintained in its highest position without being further raised, while the inner support member 78 of the upper mold assembly 72 continues to be lowered, and the lower end of the mold member 110 comes into contact with the synthetic resin material 278, and as a result, the mold member 1
10 is applied to the inner support member 78 against the rock-shaped member 108 against the elastic biasing action of the spring means 134 (FIG. 3).
The mold member 110 is relatively raised to the raised position shown in the figure (in which the lower surface of the main portion 126 of the mold member 110 abuts the lower surface of the mold member 10), and also the eighth
- As shown in Figure B, the synthetic resin material 278 is compressed and deformed to some extent between the mold member 110 and the mold member 240. (
Therefore, during rotation to the upstream end of cooling zone C, the inner support member 78 of the upper mold assembly 72, and thus the mold members 108 and 110, are lowered somewhat further, thus lowering the
As can be understood by comparing and referring to Figure B and Figure 8C, the synthetic resin material 278 is compressed and deformed to form the container lid 252. Regarding such compression molding, the following facts should be noted. That is, while comparing and referring to FIG. 8-B and FIG. 8-C, FIG. 7-A and FIG.
As can be understood by referring to Figure C, during the compression molding, the outer support member 76 of the upper mold assembly 72,
Accordingly, mold members 138 and 140 are raised a predetermined amount, and outer support member 180 of lower mold assembly 74, and therefore mold member 202, is raised a predetermined amount, thus
The flow of the synthetic resin material 278, more specifically the mold member 110
The flow of the synthetic resin material 27B that flows between the outer peripheral surface of the mold member 202, 140, and the inner peripheral surface of the mold members 202, 140, and 138 to form the skirt wall is promoted, and the container M252 is formed as required.
is reliably formed. Furthermore, regarding the above compression molding,
The following facts should be noted. However, it is extremely difficult, if not impossible, to make the amount of synthetic resin material 278 supplied to the mold means 14 in the material loading area A a predetermined amount extremely precisely, and generally,
There is some variation in the amount of synthetic resin material 278 supplied to the mold means 14. According to the mold means 14 in the illustrated compression molding apparatus 2 constructed in accordance with the invention:
Errors or fluctuations in the amount of synthetic resin material 278 are caused by
This is compensated for by changing the thickness t (Fig. 6) of the top wall 254 without changing the effective height h (Fig. 6) from the inner surface of the top wall 254 to the lower end of the skirt wall 256 at 2. . That is, in the illustrated mold means I4, the position of the upper mold assembly 72 inner support member 78, and thus the mold members 110 and 108, in FIG. The positions of members 140 and 138 in FIG. 8-C (and thus the position of mold member 202 of lower mold assembly 74 in FIG. 8-C) reflect the cooperation of annular cam 68 and cam roller 104 and annular cam 70, respectively. and the cam roller 106, and the annular cam 66 and the cam roller 90 mechanically define the position. On the other hand, in the lower mold assembly 74, the inner support member 182 at position 1 in FIG. The inner support member 182 and the seventh member 24 are
0, a spring means 236 is interposed between the two. The spring means 236 elastically biases the mold member 240 upwardly with a force large enough to compression mold the synthetic resin material 278, but a force greater than the elastic biasing force of the spring means 2360 acts on the mold member 240. Then, the mold member 240
is lowered against the elastic biasing action of spring means 236.

As described above, for example, if the amount of the supplied synthetic resin material 278 is slightly larger than the predetermined amount, the eighth
- As shown in the exaggerated double-dashed line in Figure C, the mold member 24
0 is slightly lowered from the predetermined position, thus mold member 240
The thickness t of the top wall 254 becomes thicker by the amount of descent of In this case, the mold member 240 rises slightly from the predetermined position, and thus the top wall 25
The thickness t of 4 becomes thinner, and the supplied synthetic resin material 278
is compensated for. - In general, the effective height h of the container lid 252 is important for the sealing properties of the container lid 252, but the thickness t of the top wall 254 itself is
Therefore, according to the illustrated mold means 14, the supplied synthetic resin material 27
Regardless of slight variations in the amount of 8, it is possible to mold the container M252 in which the required sealing properties and the like are ensured.

While mold means 14 continues to rotate in the direction indicated by arrow 10 in FIG. Mold members 202 and 240 continue to remain in the position shown in FIG. 8-C. Then, the container 1 formed during this time
252 is sufficiently cooled. The mold means 14 is in the cooling area C
During further rotation, the upper mold assembly 72
The outer support member 76 and the inner support member 78 of the lower mold assembly 74 are gradually raised, and the outer support member 1 of the lower mold assembly 74 is gradually raised.
80 and inner support member 182 are gradually lowered.

At this time, in the upper mold assembly 72, the mold member 110
is the eighth-D with respect to the inner support member 78 and the mold member 108.
8-D, and mold member 140 is lowered relative to outer support member 76 and mold member 138 to the extended position shown in FIG. 8-D. The state will be as shown in the figure. In this state, the mold members 108, 138 have already been separated from the container lid 252. When the state shown in FIG. 8-D is reached, the stationary cam means 176 moves to the cam driven means 174 as described with reference to FIGS. 3 and 4.
act to force the restricted member 158 into the second angular position against the elastic biasing action of the spring means 170, thus providing external support for the mold member 140 when the mold member 110 is later removed from the container M252. Member 76 and mold member 13
8 and is prevented from returning from the protruding position to the retracted position. After that, the upper mold assembly 72
outer support member 76 and thus mold members 140 and 11? The raising is interrupted, but the inner support member 78 of the upper mold assembly 72, and therefore the mold members 110 and 108, continues to be raised, and the outer support member 180 of the lower mold assembly 74, and therefore the mold members 202, and the inner Support member 182, and therefore mold member 240, continue to be lowered such that mold members 110, 202 and 240 are lowered into container M2, as shown in FIG. 8=E.
He was forced to leave 52. Next, the upper mold assembly 72
The raising of the outer support member 76 and thus the mold members 140 and 138 is resumed, and thus the mold member 1140 is also disengaged from the container lid 252, as shown in FIG. Then, the molded product is dropped onto a molded product delivery means 6 (the molded product delivery device 6 will be described in detail later). During further rotation of the mold means 14 toward the stock loading area A, the outer support members 76 and inner support members 78 of the upper mold assembly 72 are further raised and the outer support members of the lower mold assembly 74 are raised further. Member 180 and inner support member 182 are lowered further such that mold members 108, 110, 138 and 140 of upper mold assembly 72 and mold members 202 and 240 of lower mold assembly 74 are lowered further.
- The state shown in Figure A is returned.

1 forest 1 picketate Next, the material supply means 4 will be explained in detail.

Referring to FIG. 1, the illustrated material supply means 4 includes an extrusion @ 282, a conduit means 284 and a goo head 286.
It is equipped with an extrusion means 280 composed of. The extruder 282, which may be of a known type per se, heats and melts a suitable synthetic resin material, such as polyethylene or polypropylene, and discharges it from its outlet. One end of the conduit means 284 is connected to the outlet of the extruder 282 and the other end is connected to the goo head 286.
connected to the entrance. The heated molten synthetic resin material discharged from the outlet of the extrusion a282 is transferred to the conduit means 284.
It is fed to the Goo head 286 through the Goo head 286. As will be described in detail later, the front surface (top surface in FIG. 1) of the Gui head 286
A circular extrusion opening is formed in the extrusion opening, and the heated and molten synthetic resin material supplied to the gouging head 286 is extruded through the extrusion opening. As will be described in detail later, a cutting means is provided in association with the extrusion opening of the goo head 286, and the synthetic resin material extruded through the extrusion opening is cut by the cutting means (thus, in the material loading area A). A mold means 14 is supplied.

In the illustrated material supplying means 4, the goo head 286 (and at least a part of the cutting means provided in connection therewith) is in the operating position shown by the solid line in FIG. It is mounted on a support frame 292 that is slidably mounted between a non-operating position shown by a dashed dotted line. When the synthetic resin material is actually supplied to the mold means 14 in the material supply area A, the support frame 292 is positioned in the working position, so that the die head 286 and its related components are transferred to the mold means 14 in the material supply area A. be positioned as required. However, if, for example, it is necessary to perform maintenance on the mold means 14 in the material supply area A, the support frame 292 may be placed in the inactive position, thus moving the goohead 286 and its associated components to the material supply area A. Retreat from, Gui Head 286
The above-mentioned maintenance and inspection can be performed easily and safely without being hindered by the construction and its related configurations. Gui head 2 for the extruder 282 which is kept stationary
86, said conduit means 284 connecting extruder 282 and die head 286 has at least two, in the case shown three, articulation joints 294, 29.
6 and 298. That is, the illustrated conduit means 28
4 is the first. Second and third conduits 300, 302 and 3
04, a first conduit 300 and a second conduit 30
2 are connected via an articulation joint 294 and a second conduit 30
2 and third conduit 304 are connected through an articulation joint 296, and third conduit 304 and the inlet of die head 286 are connected through an articulation joint 298. Articulation joint 294 is substantially vertical (perpendicular to the plane of the paper in Figure 1)
allowing pivoting of the second conduit 302 relative to the first conduit 300 about an axis 306 extending at the articulating joint 296
allows relative pivoting of the second conduit 302 and the third conduit 304 about a substantially vertically extending axis 308;
Articulating joint 298 connects third conduit 30 to the inlet of gou head 286 about axis 310 that extends substantially vertically.
The movement of the die 286 relative to the extruder 282 is allowed.

Explaining with reference to FIGS. 9 and 10, a stationary base 312 is provided at a predetermined position, and this stationary base 312
A guide rail 314 extending in a predetermined direction (the left-right direction in FIG. 9, the direction perpendicular to the paper surface in FIG. 10, and the up-down direction in FIG. 1) is fixed on the top. As clearly shown in FIG. 10, the support frame 292 is guided on the guide rail 314 via roller bearings 316 disposed on both sides of the guide rail 314. It is attached so that it can slide freely. One side of the friendly attack frame 2920 (the right side in FIG. 10) hangs downward beyond the guide rail 314, and on its lower surface there is a A link 318 is fixed thereto. On the other hand, a shaft 320 extending laterally from the stationary base 312 is rotatably mounted. One end of this shaft 320 (10th
A binion 322 that is engaged with the rack 318 is fixed to the right end in the figure. A rotary handle 324 for manual operation is fixed to the other end of the shaft 320 (the left end in FIG. 10). Because of this, when the handle 324 is rotated, the rotation of the handle 324 is transmitted to the support frame 292 via the pinion 322 and the rack 318, and the support frame 292 is connected to the guide rail 31.
4. It will be appreciated that When the support frame 292 is moved to the right in FIG. 9 to the operating position shown by the solid line, the front surface of the support frame 292 comes into contact with the first stop piece 326 fixed to the stationary base 312.
Thus, the support frame 292 is properly positioned in the predetermined operative position, and further movement of the support frame 292 to the right in FIG. 9 is prevented. On the other hand, the support frame 29
2 is moved to the left in FIG. 9 to the non-operating position shown by the two-dot chain line, the rear surface of the support frame 292 comes into contact with the second stop piece 328 fixed to the stationary base 312, and thus the support The frame body 292 is prevented from moving further to the left in FIG. The support frame 292 is also provided with a locking mechanism 330 (FIG. 9) that releasably locks it in the working position (and the non-working position). To explain with reference to FIG. 9 and FIG. 11, the support frame 2
A hole 332 penetrating vertically is formed at a predetermined position of 92, and the support frame 2 is made to correspond to the hole 332.
A disk-shaped member 333 is fixed on the plate 92 . A plurality of through slots 334 are formed at intervals in the circumferential direction on the peripheral edge of this disc-shaped member 333, and by screwing fastening bolts 335 to the support frame 292 through these slots, the support frame 292 can be tightened. A disc-shaped member 3 is placed on the body 292.
33 is fixed. Each of the slots 334 formed in the disc-shaped member 333 has an arc shape extending in the circumferential direction, and therefore, the disc-shaped member 333 corresponds to the circumferential length of the slot 334. A screw hole 331 aligned with the hole 332 formed in the support frame 292 is formed in the center of the disc-shaped member 333 whose fixed angular position is adjustable over a range of angles. has been done.

A lock bolt 336 is screwed into this screw hole 331. A manual operation lever 337 is attached to the head of the lock bolt 336.

In such a lock mechanism 330, the lever 337 is operated to rotate the lock bolt 336 clockwise when viewed from above in FIG.
36 is lowered, the lower end of the lock bolt 336 protrudes beyond the hole 332 formed in the support frame 292 and comes into contact with the upper surface of the guide rail 314, thus preventing the movement of the support frame 292 relative to the guide rail 314. is prevented, and the support frame 292 is locked. When the lever 337 is operated to rotate the lock bolt 336 counterclockwise when viewed from above in FIG. 11, and the lock bolt 336 is thus raised, the lower end of the lock bolt 336 is separated from the upper surface of the guide rail 314, thus removing the support. Frame body 2
92 is unlocked. Therefore, during locking and unlocking operations, it is necessary to operate the lever 337 to rotate the lock bolt 336 by, for example, about 60 degrees. The lever 337 can be operated from a specific direction.
It is desired that the lever 337 be able to be carried out by grasping the lever 337 in the locked state. Such a request can be easily satisfied by adjusting the fixed angular position of the disc-shaped member 333 with respect to the support frame 292.

Referring again to FIGS. 9 and 10, the front end (right end in FIG. 9) of the support frame 292 includes:
A support bracket 338 is fixed. The support bracket 338 has a vertical portion extending upward from the support frame 292 and a horizontal portion extending forward (to the right in FIG. 9) from the upper end of the vertical portion. And the support bracket 338
The above-mentioned goo head 286 is fixed on the horizontal part of the body (the goo head 286 itself will be explained in more detail later).A support block 340 is also fixed on the support frame 292, and this support block 340 The support bracket 339. The F+8 as a whole is fitted with feed blocking means indicated by the numeral 342 (feed blocking means 342 itself will be explained in more detail below). A pair of support brackets 344 and 346 are further fixed on the support frame 292 at intervals in the front-rear direction (left-right direction in FIG. 9). And such support brackets 344 and 34
6 is fitted with most of the components of the cutting means, generally indicated by the number 348 (the cutting means 348 itself will be described in more detail below).

As described above, most of the gouging head 286, the supply blocking means 342, and the cutting means 348 move from the operating position shown in solid lines in FIG. It is moved between the non-operating position shown by the dotted chain line.

To explain the goo delta rad 286 with reference to FIG. 12, the illustrated goo head 28G includes a die block 350 having a substantially rectangular parallelepiped shape, a cooling plate 351 and a goo plate 352 sequentially fixed to the front surface of the die block 350. It is composed of. A relatively large notch 354 is formed in one side of the Goui block 350 and the cooling plate 351, and a through hole 356 is formed in the Goui plate 352 corresponding to the notch 354.

A rotating ring 358 of the cutting means 348 extends through the notch 354 and the through hole 356, and a rotary cutting blade is provided at the tip of the rotating shaft 358 that projects forward beyond the goo plate 352. 360 is attached (cutting means 3480 rotating shaft 358 and rotating cutting blade 360
(more on this later). The Goui plate 352 further has an extrusion opening 362 formed therein.

An extrusion channel 364 extending from the above-mentioned inlet to the extrusion opening 362 is formed in the goo block 350 and the cooling plate 351. Thus, from the extruder 282 described above, the goo head 28 is passed through the conduit means 284.
Synthetic resin material 27 in a heated and molten state fed to the inlet of 6
8 flows through the extrusion channel 364 and is extruded through the extrusion opening 362. The synthetic resin material 278 extruded from the extrusion opening 362 is cut by the cutting edge 368 of the rotary cutting blade 360 that is rotationally driven in the direction shown by the arrow 366, and is cut by the cutting edge 368 of the rotary cutting blade 360, which is rotated in the direction shown by the arrow 366, and is then cut by the cutting edge 368 of the rotary cutting blade 360, which is rotated in the direction shown by the arrow 366. 14, and more specifically onto the mold member 240 of the lower mold assembly 74 in the mold means 14 (see also Figure 8-A).

A circulation path (not shown) in which a cooling medium such as water is circulated is formed in the cooling plate 351, and the cooling medium circulating through the circulation path causes the cooling plate to cool.
The rotary cutting blade 360 is cooled via the notebook 351 and the goo plate 352.

According to the experience of the present inventors, in particular, the amount of synthetic resin material 278 to be cut is relatively large (and the rotating cutting blade 3
When the rotational speed of 60 is relatively low, the rotating cutting blade 360
Synthetic resin material 2 cut by the cutting edge 368 of
78 descends down the surface of the Goui plate 352 to the lower edge of the Goui plate 352 along with the rotation of the rotary cutting blade 360, and then successfully separates from the Goui plate 352 and moves downward 4; It has a tendency to penetrate the underside of the surface and stick there. In order to reliably avoid such problems, the illustrated goo head 286 is provided with air jetting means.

Referring to FIGS. 13 and 14, in the illustrated Goui head 28f3, the lower end surface front end 372 of the Goui plate 352 is chamfered, and the lower end surface front end 372 faces forward. It is tilted upward.

The air jetting means includes the front end portion 372 of the lower end surface.
The dive (l/-) 352 includes a narrow flow path 373 and a plurality of air jet holes 374 formed slightly behind the dive (l/-) 352. The flow path 373 is connected to one side (13th
It extends for a predetermined length in the lateral direction from the right side in the figure. A plurality of air jet holes 374 formed at intervals in the lateral direction extend substantially vertically downward from the flow path 373 and are adjacent to and behind the front end of the lower end surface of the Goui plate 352. It is open at the bottom. A gas, which may be compressed air, is supplied to the flow path 373 from a gas supply source (not shown), and the gas is injected from the air flow injection hole 374. Then, due to the action of the airflow injected from the airflow injection hole 374, the synthetic resin material 278, which has descended along the surface of the Goui plate 352 to the lower edge of the Goui plate 352 along with the rotary cutting blade 360, enters the lower surface of the Goui plate 352. The detachment of the synthetic resin material 278 from the rotary cutting blade 360 is effectively prevented, and the synthetic resin material 278 is thus allowed to fall sufficiently reliably in the desired trajectory, and the mold means 14 is supplied onto the mold member 240 (8th-AI) of the lower mold assembly 74 at. If desired, the air jet holes 374 can be inclined downwardly and forwardly from the flow path 373 to open at the front end 372 of the lower end surface, as shown in FIG. As shown in the figure, air jet holes 374 and the flow path 3 extend substantially vertically downward from the flow path 373.
It is also possible to form both an air flow injection hole 374 extending downward from 73 and slanting forward. Furthermore, instead of providing a plurality of air jet holes 374 at intervals in the lateral direction, as shown in FIG. 17, an elongated slit-shaped air jet 374 extending continuously in the lateral direction may be provided. can.

Next, referring to FIG. 18 together with FIGS. 9 and 10,
The supply blocking means 342 will be explained in detail. The illustrated supply blocking means 342 includes a receiving member 376 constituted by a thin rectangular dish-shaped body, and a device attachment means 378 constituted by a pneumatic cylinder mechanism. The support frame 292
The vertical part of the support bracket 338 fixed to
9 and 10), a pedestal 380 is fixed thereto and extends substantially horizontally, and the receiving member 37G is movably placed on this pedestal 380.

To explain mainly with reference to FIG. 18, the receiving part) No. 37
A connecting piece 382 is fixed to one side of 6 and projects substantially horizontally therefrom, and an upper end of a pin 384 extending substantially vertically is fixed to this connecting piece 382. On the other hand, in the vertical part (FIGS. 9 and 10) of the support bracket 7) 338, there is a support member 3 extending substantially horizontally therefrom.
86 is also fixed, and a pin receiving hole extending vertically is formed at the tip of this support member 386. The pin 384 is rotatably inserted into this pin receiving hole. Pin 3 protrudes downward from the pin receiving hole
A connecting piece 390 is fixed to the lower end of the connecting piece 84.
A connecting piece 392 is connected to the connecting piece 90 so as to be freely movable. The tip of a piston rod 394 of a pneumatic cylinder mechanism constituting the positioning means 378 is fixed to the connecting piece 392 . On the other hand, a support member 396 is fixed to the support block 340 fixed to the support frame 292 (FIGS. 9 and 10). The base end of a cylinder 398 of a pneumatic cylinder mechanism constituting the positioning means 378 is connected to this support member 396 so as to be freely movable by a connecting pin 400 extending substantially vertically. Thus, when the pneumatic cylinder mechanism constituting the positioning means 378 is expanded or contracted, the receiving member 376 is positioned on the pin 38.
It can be rotated around 4. When the pneumatic cylinder mechanism is expanded and contracted to rotate the receiving member 376 in the direction shown by the arrow 402 and the receiving member 376 is placed in the non-operating position shown by the solid line in FIG. abuts against a first stop piece 404 mounted on the top;
Further rotation of the receiving member 376 in the direction indicated by arrow 402 is thus prevented. When the pneumatic cylinder mechanism is contracted and the receiving member 376 is rotated in the direction shown by the arrow 406, and the receiving member 376 is brought to the operating position shown by the two-dot chain line in FIG. 380
It abuts a second stop piece 408 mounted above, thus preventing further rotation of the receiving member 376 in the direction indicated by arrow 406. As described above mainly with reference to FIG. 12, the synthetic resin material 278 that has been extruded from the extrusion opening 362 of the die held 286 and cut by the rotary cutting blade 360 is separated from the rotary cutting blade 360 and placed in the mold means. When the receiving member 376 is placed in the operating position, the front end of the receiving member 376 is located in the falling path of the synthetic resin material 278. , therefore synthetic resin material 27
8 falls onto the receiving member 376 and thus the mold means 14
The synthetic resin material 278 is prevented from being supplied onto the mold member 240 of the lower mold assembly 74 at. On the other hand, the receiving member 376
is placed in the non-operating position. Then, the receiving member 376 is located away from the falling path of the synthetic resin material 278, so that the synthetic resin material 278 falls onto the mold member 240 of the lower mold assembly 74 in the mold means 14.

Air jetting means 410 is provided at the front end of the receiving member 376. This air jetting means 410 includes a receiving member 376
It includes a block 412 fixed to the front end of the. This block 412 has a channel 414 extending laterally from one end over a required length, and a plurality of channels extending rearward from the channel 414 at intervals in the lateral direction and opening at the rear surface of the block 412. Air flow injection holes 416 are formed (instead of forming a plurality of air flow injection holes 416, one or more elongated slits may be formed).

The flow path 414 is a pipe line including a control valve (not shown)
to a gas supply (not shown). When the receiving member 376 is positioned at the operating position, the control valve is opened and compressed air is supplied from the gas supply source to the flow path 414, and the gas is injected from the air injection hole 416. Ru. The airflow injected from the airflow injection hole 416 acts on the synthetic resin material 278 that has fallen onto the front end of the receiving member 376 and forces it toward the rear end of the receiving member 376. Referring to FIGS. 9 and 10 together with FIG. 18, in the illustrated example, the receiving member 3
Associated with 76 are passage means 418 consisting of a stationary duct.

An inlet formed at the upper end of this passage means 418 is positioned corresponding to the rear end of the receiving member 376. Further, the lower end of the passage means 418 is connected to a resin reservoir 42 containing water.
It is connected to 0.

The synthetic resin material 278 forced to the rear end of the receiving member 376 by the airflow is transferred from the receiving member 376 to the passage means 418.
The resin is fed into the inlet of the resin reservoir 420 through the passage means 418, where it is cooled and hardened by the water contained therein. In order to allow the synthetic resin material 278 in a heated and molten state to move smoothly through the passage means 418 without adhering to the inner wall surface of the passage means 418, the passage means 418 is heated by an appropriate means (not shown). supplying water to the population, thus creating a stream of water flowing from the inlet to the outlet of the passage means 418, which is accompanied by a stream of synthetic resin material 2.
78 is preferably conveyed through passage means 418.

Regarding the supply blocking means 342 described above, the following fact should be noted. That is, the operation of the extruder 282 is not stabilized until the required time elapses after the extruder 282 starts operating, and the amount and temperature of the synthetic resin material 278 extruded from the extrusion opening 362 do not reach the required values. In such a period, if the synthetic resin material 278 is supplied to the mold means 14 and molding is performed, the molded product will be defective, as is easily understood, and the mold means 14 etc. will be adversely affected. There is a risk of receiving However, in the illustrated embodiment, the receiving member 376 is positioned in the operating position until the operation of the extruder 282 becomes sufficiently stable, thus blocking the supply of the synthetic resin material 278 to the mold means 14. Therefore, it is possible to avoid molding a defective molded product and to reliably prevent the mold means 14 and the like from being affected by negative influences. In addition, although the operation of the extruder 282 is stable, for example, due to some trouble occurring in the rotary compression molding means 2, the synthetic resin material 27 to the mold means 14 may
Also, if it is desired to stop the supply of extruder 2
without stopping the operation of the extruder 82 (if the operation of the extruder 282 is once stopped, when the operation of the extruder 282 is restarted,
(A so-called waiting time is required until the operation of the extruder 282 becomes stable), the receiving member 376 is positioned at the above-mentioned operating position, and thus the supply of the synthetic resin material 278 to the mold means 14 can be prevented.

Next, the cutting means 348 will be explained in detail with reference to FIG. 19. A pair of bearing blocks 422 and 424 are fixed on the support bracket 344 fixed on the support frame 292 at intervals in the front-rear direction (horizontal direction in FIG. 19). The rotating shaft 358 is connected to the pair of bearing blocks 422 and 424.
It is supported rotatably and movably in the front-back direction. More specifically, a circular recess 426 is formed on the front surface of the bearing block 422.
A bearing 428 for pivotally supporting the rotating shaft 358 is disposed therein. A protrusion 430 that protrudes rearward is formed on the rear surface of the bearing block 422.
A disc-shaped spring receiver 432 is screwed onto 30. On the other hand, a relatively large circular recess 434 is formed in the front surface of the bearing block 424, and a substantially cylindrical sliding member 436 is slidably slidable in the front and rear directions (left and right directions in FIG. 19) within the recess 434. It is accommodated. A bearing 438 for pivotally supporting the rotating shaft 358 is disposed within the sliding member 436. A spring means 440, which may be a compression coil spring, is disposed between the sliding member 436 and the spring receiver 432. This spring means 440
elastically biases sliding member 436 rearwardly (to the left in FIG. 19) and thus resiliently biases rotary shaft 358 rearwardly, thus causing the rotary cutting blade mounted on the front end of rotary shaft 358 to 360 is elastically pressed against the surface of the Goui plate 352 in the die head 286.

As can be easily understood by referring to FIG. 12, the die plate 35 in the die head 286
In order for the rotary cutting blade 360 to sufficiently cut the synthetic resin material 278 extruded from the extrusion opening 362 formed in the rotary cutting blade 360, the cutting edge 3 of the rotary cutting blade 360 must
It is important that 68 be brought into close contact with the surface of Guiplay 4352 sufficiently well. In order to ensure that such requirements are met, in the illustrated cutting means 348, the rotary shaft 358 is elastically biased rearward by the spring means 440 as described above, and the rotary cutting blade 360 is attached to the die plate 3.
In addition to elastically pressing against the surface of the rotating shaft 3
A unique attachment method is adopted for attaching the rotary cutting blade 360 to the tip of the rotary cutting blade 360.

Referring to FIG. 20, a through hole 442 is formed at the tip of the rotating shaft 358. This through hole 42
2 has a predetermined width direction dimension W and an axial direction dimension of 1° which is sufficiently larger than this width direction dimension W1. Through hole 422
The front wall 444 is formed into an arcuate convex wall centered on the central axis 446. On the other hand, in the center of the rotary cutting blade 360, there is a shaft insertion hole 44 extending in the axial direction of the rotary shaft 358.
8 is formed. The inner diameter d of this shaft insertion hole 448! is somewhat larger than the outer diameter d1 at the tip of the rotating shaft 358. The rotary cutting blade 360 further has a pin receiving hole 450 formed in its front surface. This pin receiving hole 450 extends in a direction substantially perpendicular to the shaft insertion hole 448, and is also open to the front. The width direction dimension of the pin receiving hole 450 (therefore, the inner diameter of the semicircular portion located at the rear) W2
A pin 452 is used to attach the rotary cutting blade 360 to the tip of the zero-rotation shaft 358, which may be substantially the same as the widthwise dimension W1 of the through hole 442. The outer diameter d of this pin 452 may be substantially the same as the widthwise dimension W1 of the through hole 442, and therefore may be substantially the same as the widthwise dimension W2 of the pin receiving hole 450. The front surface of the pin 452 has the through hole 4
An arcuate recess 453 corresponding to the arcuate convex shape of the front wall 444 of 42 is formed. If desired, the through hole 4
The front side wall 444 of 42 is formed into an arcuate concave shape, and the pin 45
An arcuate convex portion corresponding to the front surface of 2 may be formed.

Attaching the rotary cutting blade 360 to the tip of the rotating shaft 358 is as follows:
It is carried out as follows. First, the rotary cutting blade 360
The tip of the rotating shaft 358 is inserted into the shaft insertion hole 448 of the rotary shaft 358 . Next, the through hole 442 formed in the rotating shaft 358
and a pin receiving hole 45o formed in the rotary cutting blade 360.
Insert the pin 452 inside. Thus, the rotation axis 358
is elastically biased rearward in the axial direction by the spring means 440, whereas the rearward movement of the rotary cutting blade 360 in the axial direction is limited by the rotary cutting blade 360 being pressed against the gouging plate 352. , Gon452
The four arcuate parts 453 formed on the front surface of the rotating shaft 35
A pin receiving hole 45 is engaged with a front side wall 444 having an arcuate convex shape of a through hole 442 formed in 8, and the rear surface of a pin 452 is formed in a rotary cutting blade 360.
0, thus rotating #lB35
B, pin 452 and rotary cutting blade 360 are maintained in the desired combination.

In the mounting method as described above, the following facts should be noted. First, since the inner diameter d2 of the shaft insertion hole 448 formed in the rotary cutting blade 360 is somewhat larger than the outer diameter d1 at the tip of the rotating shaft 358, the rotary cutting blade 360
60 is the pin 452 with respect to the rotating shaft 358 and the pin 452.
It is freely pivotable over a predetermined angular range (this angular range is defined by the difference between the inner diameter d2 and the outer diameter d) about the central axis 454 of. Second, the rotary cutting blade 36
The inner diameter dt of the shaft insertion hole 448 formed at 0 is the outer diameter d at the tip of the rotating shaft 358.

In addition to being somewhat larger, the front side wall 444 of the through hole 442 formed in the rotation $IE 358 and the recess 453 formed in the front surface of the pin 452 have a corresponding circular arc shape, and the recess 453 formed in the rotation shaft 358 Through hole 442
Since the axial dimension 1 of the pin 452 is sufficiently larger than the outer diameter d of the pin 452, the pin 452 and the rotary cutting blade 360 are aligned with the central axis 446 (i.e., the through hole 442) with respect to the rotating shaft 358.
A predetermined angular range (this angular range is also within the above-mentioned inner diameter d2 and outer diameter d) is centered on the central axis of the arcuate front wall 444.

(defined by the difference between

In this way, the rotating cutting blade 360 rotates with respect to the rotating shaft 358.
Since it is rotatable about two axes that are perpendicular to the axial direction of the rotating shaft 358 and perpendicular to each other, that is, the central axis 454 and the central axis 446, the surface of the Goui plate 352 is sufficiently flat. In addition, as long as the cutting edge 368 of the rotary cutting blade 360 is sufficiently straight, there may be assembly or manufacturing errors such as the rotary shaft 358 not being positioned perpendicularly precisely to the surface of the die plate 352. Even if the cutting edge 3 of the rotary cutting blade 360
68 is brought into close contact with the surface of the die plate 352 in a sufficiently good manner.

As already mentioned with reference to FIG. 12, the cutting means 348
The rotating shaft 358 extends through a notch 354 formed in the die block 350 of the goohead 286. An extrusion channel 364 is formed in the Goo block 350, and the synthetic resin material 278 in a heated and molten state flows through the extrusion channel 364. Therefore, guipro.

The shaft 350 becomes quite hot, and due to this, the rotating shaft 3
58, especially its front part also tends to get quite hot. If the rotating shaft 358 reaches a considerably high temperature, it will adversely affect its shaft support structure, etc., and the rotary cutting blade 36 will be removed from the rotating shaft 358
A problem arises in that heat is transferred to the rotary cutting blade 360 and the rotary cutting blade 360 becomes unacceptably hot. To solve this problem, in the illustrated embodiment, the rotating wheel 358 of the cutting means 348 is provided with cooling means. Referring again to FIG. 19, the bearing block 422 has an inlet passage 4 extending downward from its upper end surface.
56, and an annular flow path 458 following this inlet flow path 456. The annular flow path 458 extends along the circumferential surface of the rotating shaft 358. On the other hand, the rotating shaft 358 has a main flow channel 46 that extends radially inward from the outer peripheral surface of the rotating shaft 358 following the annular flow channel 458 and then extends axially forward.
0, and a plurality of discharge passages 462 (first
Two discharge passages 462 are shown in FIG. 9). A cooling medium, which may be room temperature or chilled air, is supplied to the inlet flow path 456 from a supply source (not shown), and the cooling medium flows through the annular flow path 458 and the main flow path 460, It is then discharged to the surrounding atmosphere through the discharge passage 462. Thus, the axis of rotation 358
is cooled, and the rotary cutting blade 360 is also cooled accordingly. In order to enhance the cooling effect, it is also possible to flow room temperature or cooling water as a cooling medium. In this case,
A suitable collection vessel (not shown) is provided to allow the flow path to be in a circulating manner, without discharging the cooling medium into the surrounding atmosphere.
It is desirable to return to

Continuing the explanation with reference to FIG. 19, the rotary shaft 358 of the cutting means 348 is connected to the rotary drive source 52 (this rotary drive source 52 is , functions as a driving source for the above-mentioned rotary compression molding means 2, and also serves as a cutting means 3 in the material supply means 4.
48). That is, the rotary ring 358 is connected to the transmission shaft 463 through a known joint mechanism 461 such as an Oldham joint that allows the rotary shaft 358 to move in the axial direction. The transmission shaft 463 is rotatably supported by a bearing 465 mounted on the support bracket 346. The transmission shaft 463 is drivingly connected to a transmission shaft 466 via a rotation angle position adjustment mechanism 464. Rotation angle position adjustment mechanism 4 mounted on the support bracket 346
64 makes it possible to adjust the relative rotational angular position of the transmission shaft 463 with respect to the transmission shaft 466 as required (the configuration and operation effect of this rotational angular position adjustment mechanism 464 will be described in more detail later), as described above. The stationary base 312 on which the support frame 292 is attached (FIGS. 9 and 10)
A hollow housing 468 is fixed to the rear end (see also the figure), that is, the left end in FIG. At the top of the housing 468, a pair of bearings 470 are provided.
A cylindrical sleeve 472 is rotatably mounted thereon. Further, a transmission shaft 474 is rotatably attached to the lower part of the HAVNSIG 468 by a pair of bearings 473. The rear end of the transmission shaft 466 (ie, the left end in FIG. 19) is inserted into the cylindrical sleeve 472. A keyway is formed in the inner peripheral surface of the cylindrical sleeve 472 and the outer peripheral surface of the transmission shaft 466, and a key 476 is formed in the keyway to prevent relative rotation between the cylindrical sleeve 472 and the transmission shaft 466. is installed. Thus,
The transmission shaft 466 can freely move in the front-rear direction (left-right direction in FIG. 19) with respect to the cylindrical sleeve 472 (this allows the support frame 292 and the components attached thereto to The cylindrical sleeve 472 rotates integrally with the cylindrical sleeve 472. is oval gear 4
78 is fixed, and an elliptical gear 480 is fixed to the transmission shaft 474.
is fixed. The mutually engaged elliptical gears 478 and 480 constitute a nonuniform rotation mechanism 482 (the nonuniform rotation mechanism 482 will be described in more detail below). The transmission shaft 474, which constitutes an input shaft of the non-uniform rotation mechanism 482, is drivingly connected to a transmission shaft 486 via a rotation angle adjustment mechanism 484. A rotational angle position adjustment mechanism 484 mounted on the stationary base 31λ makes it possible to adjust the relative rotational position of the transmission shaft 474 with respect to the transmission shaft 486 as required. (The configuration and effects will be explained in more detail later). A pulley 488 is fixed to the transmission shaft 486, and a transmission belt 490 is wound around the pulley 488. The transmission heald 490 is drivingly connected to the drive source 52 via a suitable driving connection train (not shown). Thus, the rotation of the drive source 52 is caused by the transmission belt 490, the pulley 488, the transmission shaft 486, the rotation angle position adjustment mechanism 484, the transmission shaft 474, the inconstant rotation mechanism 482, the cylindrical shaft 17. - transmitted to the rotating shaft 358 via the transmission shaft 466, the rotation angle position adjustment mechanism 464, the transmission shaft 463, and the joint mechanism 461;
8 and the rotary cutting blade 360 attached thereto are rotationally driven.

To explain with reference to FIG. 21 as well as FIG. 19, an inconstant rotation mechanism 48 composed of elliptical gears 478 and 480
2 converts the constant velocity rotation transmitted from the drive source 52 to its input shaft, ie, the transmission shaft 474, into inconstant velocity rotation, and transmits it to its output shaft, ie, the transmission shaft 466. Oval gears 478 and 480
Considering the angular velocity ω2 of the elliptical gear 478, where the flatness of the elliptical gear 480 is e, the constant angular velocity of the elliptical gear 480 is ω7, and the angular velocity ω of the elliptical gear 478 is considered, the rotation angle of the elliptical gear 478 is θ2 is 2,2=up. . 3-
・(-courtesy) 2 1 + kcos2θ1 e Here, ・k=l+e・ The angular velocity ω8 of the elliptical gear 478 with respect to the constant angular velocity ω1 of the elliptical gear 480 is as follows. Therefore, the rotation peripheral speed is the angular velocity ω of the elliptical gear 478 relative to the constant angular velocity ω1 of the elliptical gear 480, and the second
The result is as illustrated in Figure 2. Thus, the rotary shaft 358 and the rotary cutting blade 360 attached thereto are driven to rotate at unequal angular velocities as illustrated in FIG. 22.

Regarding the inconstant speed rotation mechanism 482 as described above, the following facts should be noted. That is, the rotary cutting blade 360 is the mold means 1 in the rotary compression molding means 2.
4 (see FIG. 1), the extrusion opening 362 of the extrusion means 280 (see FIG. 12)
It is necessary to cut the synthetic resin material 278 extruded from. Therefore, the time required for the rotary cutting blade 360 to rotate once is uniquely defined by the rotational speed of the mold means 14 in the rotary compression molding means 2. On the other hand,
According to the experience of the present inventors, in order to cut the synthetic resin material 278 extruded from the extrusion opening 362 as required, the angular velocity ω2 of the rotary cutting blade 360 when crossing the extrusion opening 362 is set to a required value. It has been found that it is usually important to make the value sufficiently large. However, according to the above-mentioned inconstant speed rotation mechanism 482, as can be understood by referring to FIG. The angular velocity ω8 of the cutting blade 360 is set to an appropriate value from sinω2 to +maxω2, usually waxω
2, thus reducing the rotational cutting blade 360 as it traverses the extrusion opening 362 without disrupting the synchronization of the rotation of the mold means 14 and the cutting of the plastic material 278.
The angular velocity ω2 of can be made to a desired value.

In the illustrated example, the rotational angular position 11 fiff
Transmission shaft 474 to transmission shaft 486 by mechanism 484
The relative rotational angular position of the rotary compression molding means 2 is adjusted accordingly, and the rotation of the mold means 14 in the rotary compression molding means 2 and the cutting of the synthetic resin material by the rotary cutting blade 360 are synchronized as required. In addition, the relative rotation angle position of the transmission shaft 463 with respect to the transmission shaft 46G is appropriately adjusted by the rotation angle position adjustment mechanism 464, and thus the angular velocity ω2 of the rotary cutting blade 360 when crossing the extrusion opening 362 is adjusted from 5hinω2 to waxω8. Set to the value of Therefore, from the viewpoint of ease of adjustment, the rotation angle position adjustment mechanisms 464 and 484 adjust the relative rotation angle position of the output shaft with respect to the input shaft without stopping the rotation of the input shaft and output shaft. It is desirable to have a configuration that allows adjustment of the

The rotational angle position adjustment mechanism 464 will be described with reference to FIG. 23. The illustrated rotational angle position if/flff mechanism 464 includes a main block 492 having a housing space open in the front-rear direction (left-right direction in FIG. 23); Rear wall 4 fixed to the rear and front surfaces of this main block 492, respectively.
94 and a front wall 496. Rear wall 494 and front wall 496 have longitudinally aligned openings in which bearings 498 and 500 are disposed. Furthermore, a support block 504 having a hole 502 penetrating in the front-rear direction is fixed to the inner surface of the rear wall 494. The front end of the transmission shaft 466 constituting the input shaft is rotatably supported by the bearing 498,
It passes through the hole 502 of the support block 504 and projects forward. The rear end portion of the transmission shaft 463 constituting the output shaft is rotatably supported by the bearing 500,
It protrudes backwards. An input gear 506 is fixed to the front end of the transmission shaft 466, and an output gear 508 is fixed to the rear end of the transmission shaft 463. On the other hand, a rotating body 5 is attached to the outer periphery of the support block 504 via a bushing 510.
12 is rotatably attached. As will become clear from the following description, the rotation of this rotating body 512 is normally restricted, and is rotated by the operator only when adjusting the relative rotational angular position of the transmission shaft 463 with respect to the transmission shaft 466. The rotating body 512 has a short shaft 5 protruding forward.
14 is implanted, and an input side transmission gear 516 is rotatably mounted on this short shaft 514.

This input side transmission gear 516 is engaged with the input gear 506. Further, a short shaft 518 protruding rearward from the inner surface of the front wall 496 is implanted, and an output side transmission gear 520 is rotatably mounted on the short shaft 518. This output side transmission gear 520 is the output gear 50
8. Further, a relatively large internal gear 522 surrounding the input side transmission gear 516 and the output side transmission gear 520 is provided. A bearing 524 is interposed between the outer circumferential surface of the internal gear 522 and the inner circumferential surface of the main block 492, thus allowing the internal gear 5220 to rotate relative to the main block 492. The teeth formed on the inner peripheral surface of the internal gear 522 are engaged with the input end transmission gear 516 and also engaged with the output transmission gear 520.

Referring to FIG. 24 together with FIG. 23, the main block 492 further includes bearings 524 and 52.
6, a shaft 528 extending substantially perpendicular to the transmission shaft 466 and the transmission shaft 463 is mounted in rotation, aa. Worm teeth 530 are carved on the outer peripheral surface of the rotating body 512.

A worm 532 that is engaged with worm teeth 530 is fixed to the shaft 528.

As shown in FIG. 24, one end of said 528 is made to protrude from the main block 492. A manual operation knob 534 is fixed to this protrusion. Further, a substantially cylindrical member 536 is also attached to the protruding end. This member 536 is mounted to shaft 528 such that it can move axially relative to shaft 528 but rotates therewith. A substantially annular member 538 is fixed to the main lock 492, and an inward flange 540 is formed at the outer end of the member 538 and extends radially inward. Correspondingly, an outward flange 542 is formed at the inner end of the member 536 and extends outward in the radial direction. Furthermore,
A male thread is carved on the outer peripheral surface of the member 536,
A lock nut 544 is screwed onto each of these screws.

A washer 546 is disposed between the lock nut 544 and the member 538. When the lock nut 544 is rotated in a predetermined direction, the lock nut 544
In FIG. 4, the member 5 is moved to the left.
36 is moved to the right in FIG. rotation is restricted. When the rotation of the shaft 528 is restricted, the worm 532 fixed to the shaft 528
The rotation of the rotating body 512 is also restricted due to the presence of the worm teeth 530 that are engaged with the worm teeth 530. When the lock nut 544 is rotated in the opposite direction, the lock nut 544 is moved to the right in FIG. 24, and the member 536 is moved to the left in FIG. The clamping of the inward flange 540 of the member 538 between the
By rotating the shaft 528, the shaft 528 can be rotated.

The effects of the rotation angle position adjustment mechanism 464 as described above are summarized as follows.

During normal operation (i.e., the transmission shaft 466
When the relative rotational angular position of the shaft 528 is not adjusted (), the rotation of the shaft 528 is restrained by the action of the lock nut 544 and the like, and therefore the rotation of the rotating body 512 is restrained. In this state, the rotation of the transmission shaft 466 is transmitted to the internal gear 522 via the input gear 506 and the input transmission gear 516, and the rotation of the internal gear 522 is transmitted via the output transmission gear 520 and the output gear 50B. Transmission shaft 4
63, thus causing the transmission shaft 463 to rotate. In the illustrated example, the input gear 506 and the output gear 508 have the same number of teeth (therefore, the input transmission gear 516
(and the number of teeth of the output side transmission gear 520 is also the same), the transmission shaft 463 is rotated at substantially the same angular velocity as the transmission shaft 466, and the number of teeth of the gear 520 is changed appropriately to adjust the rotation angle position adjustment mechanism. 484 can also be provided with a deceleration or speed increase function.

When adjusting the relative rotational angular position of the transmission shaft 463 with respect to the transmission shaft 466, the rotational restraint of the shaft 528 is released by operating the lock nut 544. Then, the manual operation knob 534 is operated to rotate the shaft 528. In this way, the rotating body 512 is rotated via the worm 532 and the worm teeth 530. (Then, the input end transmission gear 516, which is rotating around the short axis 514, is caused to revolve around the input gear 506, and the rotation of the internal gear 522 is accordingly temporarily promoted or suppressed. The rotation of the output side transmission gear 520 and the output gear 508 is temporarily promoted or suppressed, and thus the rotation of the transmission shaft 463 is temporarily promoted or suppressed, and the rotational angular position of the transmission shaft 463 with respect to the transmission shaft 466 is changed. Transmission shaft 4
An example of the degree of variation in the rotational angular position of the transmission shaft 463 with respect to the rotational angle position of the transmission shaft 463 with respect to the rotation angle 66 will be explained as follows. Input gear 5
02, the number of teeth of the input side transmission gear 516 is zb, the number of teeth of the output side transmission gear 520 is Zc, the number of teeth of the output gear 508 is Zd, the number of teeth of the internal gear 522 is Ze, and the transmission shaft 46
3 (the positive or negative of no depends on the rotation direction of the rotating body 512).
The relative relationship between the rotation angle nm of 8 and the rotation angle ni of the rotating body 512 is nR+=punishment. Therefore, for example, the shaft 52
8 is rotated by 30 degrees, the angular position of the transmission shaft 463 with respect to the transmission shaft 466 is changed by ]]=2 degrees.

Thus, according to the illustrated rotation angle position adjustment mechanism 464, the transmission shaft 463 relative to the transmission shaft 466 can be adjusted without having to stop the rotational drive of the transmission shaft 466 and the transmission shaft 463.
The relative rotational angular position of can be adjusted as appropriate.

The adjustment angular position adjustment mechanism 484 for adjusting the relative rotational angular position of the transmission shaft 474 with respect to the transmission shaft 486 may have substantially the same form as the rotational angular position adjustment mechanism 464 described above, and therefore the detailed description thereof will be omitted. Omitted.

Next, the molded product delivery means 6 will be explained. Referring to FIGS. 25 and 26, the illustrated molded product delivery means 6 includes a delivery shade 548 and a rotary transfer mechanism 550.

located between mutually spaced upper and lower mold assemblies 72 and 74 of the upper stage 14 of the discharge chute 548, which is supported in position by a suitable support structure (not shown). (See also Figures 1 and 8-F). A plurality of suction holes 554 are formed in the upstream end portion 552, and a suction means 556 is disposed in association with the suction holes 554. The suction means 556 in the illustrated embodiment includes a suction chamber 558 attached to the lower surface of the upstream end 552 of the discharge chute 548 . The suction chamber 558 is connected to a suitable suction source (not shown), such as a vacuum pump, via a suction tube 560. Therefore, air is sucked from the suction hole 554 through the suction chamber 558 and the suction tube 560. Figure 25 and 2
As can be easily understood by referring to FIGS. 8-E and 8-F in conjunction with FIG. This facilitates the detachment of the molded product or container lid 252, and also attracts the container M252 that has been separated from the upper mold assembly and fallen onto the upstream end 552 of the discharge chute 548, thereby preventing the container lid 252 from accidentally falling. To prevent.

The rotation transfer mechanism 550 includes a rotation shaft 56 that extends substantially vertically.
2 and a rotating member 564 attached to this rotating shaft 562. The rotating member 564 has at least one, and in the illustrated case three, arms 566 extending radially outwardly.
has. The rotary shaft 562 is drivingly connected to a suitable rotary drive source such as an electric motor (this rotary drive source may be the rotary drive source 52 in the rotary compression molding means 2 described above), and the rotary shaft 562 and the rotary member 564 is rotationally driven in the direction shown by arrow 568 in FIG. 25 and 26, when rotating member 564 is rotated in the direction indicated by arrow 568, arm 566 is located at upstream end 552 of output chute 548. The container M252 is moved from the upstream end 552 of the discharge chute 548 toward the lower end. The containers M252 thus moved from the upstream end 552 of the discharge chute 548 are transported through the discharge chute 548 to an appropriate location (for example, a collection site).
transported to.

Although preferred specific examples of the compression molding apparatus constructed according to the present invention have been described above in detail with reference to the accompanying drawings, the present invention is not limited to such specific examples, and there may be no deviation from the scope of the present invention. Needless to say, various modifications and modifications are possible.

[Brief explanation of the drawing]

FIG. 1 is a simplified plan view showing an example of an integrated compression molding apparatus constructed according to the present invention. FIG. 2 is a partial sectional view showing rotary compression molding means in the compression molding apparatus of FIG. 1. FIG. 3 is a partial sectional view showing the upper mold assembly in the rotary compression molding means of FIG. 2; FIG. 4 is a partial perspective view showing a restricted member and related structures in the upper mold assembly of FIG. 3; FIG. 5 is a partial sectional view showing the lower mold assembly in the rotary compression molding means of FIG. 2; 6 is a side view, partially in cross section, of a container lid molded by the compression molding apparatus of FIG. 1; FIG. Figure 7-A, Figure 7-8, Figure 7-0, A[: and Figure 7-
FIG. D is a cam diagram showing the vertical movement of the outer support member and inner support member in the upper mold assembly of FIG. 3 and the outer support member and inner support member of the lower mold assembly of FIG. 5, respectively. Each of FIGS. 8-A to 8-F is a partial sectional view showing the operation of the mold means in the rotary compression molding means of FIG. 2. FIG. 9 is a simplified side view showing the material supply means in the compression molding apparatus of FIG. 1. FIG. 10 is a simplified front view of the material supply means of FIG. 9. FIG. 11 is a partial sectional view showing the locking means in the material supply means of FIG. 9. FIG. 12 is a partial perspective view showing the goohead in the material supply means of FIG. 9. FIG. 13 is a partial front view showing the Goui plate in the Goui head of FIG. 12. FIG. 14 is a partial cross-sectional view of the die plate of FIG. 13. FIGS. 15 and 16 are partial sectional views showing modified examples of the Goui plate. FIG. 17 is a partial bottom view showing a modification of the die plate. FIG. 18 is a partial perspective view showing the supply blocking means in the material supplying means of FIG. 9. FIG. 19 is a cross-sectional view showing the cutting means and related structures in the material supply means of FIG. 9. FIG. 20 is an exploded perspective view showing the relationship between the rotating shaft and the rotary cutting blade in the cutting means of FIG. 19. FIG. 21 is a simplified diagram showing an inconstant rotation mechanism in the cutting means of FIG. 19. FIG. 22 is a diagram illustrating the inconstant speed rotation state of the output shaft in the inconstant speed rotation mechanism of FIG. 21. FIG. 23 is an axial sectional view showing the rotation angle position adjustment mechanism in the cutting means of FIG. 19. FIG. 24 is a cross-sectional view of the rotation angle position adjustment mechanism of FIG. 23. FIG. 25 is a partial plan view showing a molded product delivery means in the compression molding apparatus of FIG. 1. FIG. 26 is a partial sectional view of the molded product delivery means shown in FIG. 25. 2...Rotary compression molding means 4...Material supply means 6...Molded product delivery means 14...Mold means 72...Upper mold assembly 74...Lower mold assembly 252. ... Container lid 280 ... Extrusion means 282 ... Extruder 284 ... Conduit means 286 ... Gui head 342 ... Supply blocking means 348 ... Cutting means 358 ... Rotating shaft 360 in the cutting means ...Rotating cutting blade 464...Rotation angle position adjustment mechanism 482...Inconstant speed rotation mechanism 484...Rotation angle position adjustment mechanism 548...Carrying out chute 550...Rotation transfer mechanism Figure 4 5 circle figure 6 figure 11 figure 14 figure 13 figure 15 brown figure 16 figure not 17 figure 20 figure 24

Claims (1)

[Scope of Claims] 1. A rotary support mounted rotatably around a central axis, and a plurality of mold means mounted on the rotary support at intervals in the circumferential direction, each of which comprises: mold means having an upper mold assembly and a lower mold assembly cooperating with each other, at least one of the upper mold assembly and the lower mold assembly being movable with respect to the other; a rotary drive source for rotationally driving a rotary support in a predetermined direction to move the mold means through a circular conveyance path including a material loading zone, a molding zone, a cooling zone, and a molded product discharging zone located in sequence; a rotary compression molding means comprising mold opening/closing means for causing at least one of the upper mold assembly and the lower mold assembly to move in a predetermined manner relative to the other in response to movement of the mold means; the material loading; A material supply means for supplying a synthetic resin material to the mold means in the molding area; and a molded product discharge means for transporting the molded product from the molding mold means in the molded product discharge region. Compression molding equipment. 2. The material supply means includes extrusion means for extruding the synthetic resin material in a softened and molten state through the extrusion opening, and cutting means for cutting the synthetic resin material extruded through the extrusion opening and supplying it to the mold means. a cutting means, the cutting means comprising a rotating cutting blade mounted for rotation across the extrusion opening, a rotational drive source, and driving the rotational drive source and the rotating cutting blade. and a drive coupling means for coupling, the drive coupling means including an inconstant velocity rotation mechanism for converting constant velocity rotation of the rotary drive source to inconstant velocity rotation. Compression molding equipment as described. 3. The compression molding apparatus according to claim 2, wherein the inconstant rotation mechanism comprises a pair of mutually engaged elliptical gears. 4. The driving connection means is a rotary member in which the relative angular position between the input end drivingly connected to the output end of the inconstant speed rotation mechanism and the output end drivingly connecting the rotary cutting blade is adjustable. The compression molding apparatus according to claim 2 or 3, comprising an angular position adjustment mechanism. 5. The rotational angle position adjustment mechanism includes an input gear fixed to the input shaft, an output gear fixed to the output shaft, and a relatively large diameter rotatable inner tooth surrounding the input gear and the output gear. a gear; a rotatable input transmission gear that is engaged with the input gear and the internal gear; and a rotatable input transmission gear that is engaged with the output gear and the internal gear. A patent comprising a rotatable output transmission gear and a changing mechanism for changing the angular position of at least one of the input transmission gear and the output transmission gear around the input gear or the output gear. A compression molding apparatus according to claim 4. 6. The rotary cutting blade is within an angular range between the angular position at which it starts cutting the synthetic resin material extruded from the extrusion opening and the angular position at which the cut synthetic resin material is released from the rotary cutting blade. The compression molding apparatus according to any one of claims 2 to 5, wherein the compression molding apparatus is rotated at an inconstant speed so as to reach a maximum rotational speed at . 7. The material supply means includes an extrusion means for extruding a synthetic resin material in a softened and molten state through an extrusion opening opened on a substantially flat surface, and a extrusion means for extruding a synthetic resin material in a softened and molten state through an extrusion opening opened on a substantially flat surface, and cutting the synthetic resin material extruded through the extrusion opening to remove the synthetic resin material. cutting means for feeding mold means, the cutting means comprising a rotating shaft extending substantially perpendicular to the surface through which the extrusion opening opens, and a rotating cutting blade mounted on the rotating shaft. and a drive source for rotationally driving the rotating shaft, the rotating cutting blade pivoting over at least some angular range about a first axis extending substantially perpendicular to the rotating shaft. mounted on the rotating shaft so as to be freely pivotable over at least some angular range about a second axis extending substantially perpendicular to the rotating shaft and the first axis; 2. The compression molding apparatus according to claim 1, further comprising spring means for elastically biasing the rotary shaft in a direction to press the rotary cutting blade against the surface through which the extrusion opening opens. 8. The rotating shaft extends from the rear of the surface where the extrusion opening opens to the front beyond the surface, the rotating cutting blade is attached to the tip of the rotating shaft, and the spring means 8. The compression molding apparatus of claim 7, wherein the shaft is elastically biased rearward. 9. The rotary shaft is formed with a through hole penetrating in the direction of the first axis, and the rotary cutting blade has a shaft insertion hole extending in the axial direction of the rotary shaft and a through hole penetrating in the direction of the first axis. A pin receiving hole extending to the front and opening forward is formed, and by inserting the rotating shaft into the shaft insertion hole and then inserting a pin into the through hole and the pin receiving hole, the rotating shaft can be inserted into the rotating shaft. The rotary cutting blade is installed, and the inner diameter of the shaft insertion hole is larger than the outer diameter of the rotating shaft, and thus the rotary cutting blade is attached to the first shaft that coincides with the central axis of the pin.
the through hole in the axial direction of the rotating shaft is larger than the outer diameter of the pin, and the through hole in the direction of the second axis is larger than the outer diameter of the pin; The front side wall of the through hole is an arc-shaped concave or convex wall centered on the second axis, and the front surface of the pin has a wall corresponding to the arc-shaped concave or convex wall. A circular convex portion or concave portion is formed, and thus, the circular concave or convex wall and the circular convex portion cooperate with the concave portion to cause the pin and the rotary cutting blade to move in the third direction with respect to the rotation axis. 9. The compression molding apparatus according to claim 8, wherein the compression molding apparatus is rotatable about two axes. 10. The material supply means includes an extrusion means for extruding the synthetic resin material in a softened and molten state through an extrusion opening opened on the surface, and cutting the synthetic resin material extruded through the extrusion opening into the mold means. and a cutting means for supplying the rotating shaft, the cutting means includes a rotating shaft, a rotating cutting blade attached to the tip of the rotating shaft and disposed on the surface where the extrusion opening opens, and a drive source for rotationally driving the shaft, a coolant flow path is formed at least at the tip of the rotary shaft, and by flowing the coolant through the coolant flow path, at least the tip of the rotary shaft is Compression molding apparatus according to claim 1, wherein the compression molding device is cooled. 11. The extrusion means includes a die head having the extrusion opening and a resin flow path communicating with the extrusion opening, and the rotating shaft of the cutting means extends beyond the surface from behind the surface where the extrusion opening opens. 11. A compression molding device as claimed in claim 10, extending forwardly. 12. The compression molding apparatus according to claim 11, wherein the die head is formed with a notch or an opening through which the rotating shaft of the cutting means passes. 13. The material supply means includes extrusion means for extruding the synthetic resin material in a softened and molten state through the extrusion opening, and cutting means for cutting the synthetic resin material extruded through the extrusion opening and supplying it to the molding die means. cutting means, the extrusion means including a die head having the extrusion aperture open thereon, the cutting means comprising a rotary cutting blade mounted for rotation across the extrusion aperture; and a rotation drive source for rotating the rotary cutting blade, the synthetic resin material extruded from the extrusion opening is cut by the rotary cutting blade, and the die head is rotated as the rotary cutting blade rotates. The die head is configured to be transported to the lower edge of the surface of the die head, and an air stream is injected downwardly or forwardly from the lower surface of the die head, so that the composite material is transported to the lower edge of the surface of the die head. Preventing the resin material from moving from the surface to the lower surface of the die head and promoting separation from the rotary cutting blade, so that the synthetic resin material can fall sufficiently stably and in a desired trajectory. 2. The compression molding apparatus according to claim 1, further comprising an air jet means for spraying air. 14. The compression molding apparatus according to claim 13, wherein the air jetting means has an air jetting hole opened in the lower end surface of the die head. 15. The compression molding apparatus according to claim 14, wherein the front end of the lower end surface of the die head is inclined upwardly toward the front. 16. The compression molding apparatus according to claim 15, wherein the air jet hole is adjacent to the front end of the lower end surface of the die head and opened to the rear thereof. 17. The compression molding apparatus according to claim 16, wherein the air jet hole extends substantially vertically. 18. The compression molding apparatus according to any one of claims 14 to 17, wherein a plurality of the air jet holes are arranged at intervals in the width direction of the die head. 19. The compression molding apparatus according to any one of claims 14 to 17, wherein the air jet hole is in the shape of an elongated slit extending in the width direction of the die head. 20. The mold means in the rotary compression molding means,
At least one of the upper mold assembly and the lower mold assembly includes at least one support member and at least one mold member attached to a distal end of the support member, and the support member includes a cooling member. A cooling medium flow space is formed in which a medium flows, and a heat pipe is provided, the heat absorption end of which is thermally connected to the mold member, and the heat radiation end of which is thermally connected to the cooling medium flow space. The compression molding apparatus according to claim 1, wherein the compression molding apparatus is 21. The mold member is mounted on the support member so as to be movable in the direction of the longitudinal axis of the support member, and the heat-absorbing end of the heat pipe is fixed to the mold member, and the heat pipe is fixed to the mold member. 21. The compression molding apparatus according to claim 20, wherein the heat dissipating end portion is housed within the cooling medium flow space so as to be movable in the direction of the longitudinal axis of the support member. 22. The mold means in the rotary compression molding means,
At least one of the upper mold assembly and the lower mold assembly includes at least one support member, a first mold member fixed to a distal end of the support member, and a longitudinal axis of the support member. a second mold member attached to the distal end of the support member so as to be slidable over a predetermined range in the direction of the support member; at least one restriction member fixed to the distal end of the support member; a restricted member rotatably mounted to the second mold member between a position and a second angular position and resiliently biased to the first angular position by spring means; The limiting member is formed with at least one abutment and at least one relief, the relief being formed in the first angular position when viewed in the direction of the longitudinal axis of the support member. Positioned in alignment with the restriction member, the restriction member can be received in the recess such that the corresponding abutment is positioned in the second angular position when viewed in the direction of the longitudinal axis of the support member. The limiting member is positioned in alignment with the limiting member so that the corresponding abutting portion can abut the limiting member, and the limited member is further provided with a driven cam means; Downstream of the cooling zone in the circular conveyance path of the mold means, the driven cam means is actuated to move the restricted member from the first angular position against the elastic biasing action of the spring means. 2. A compression molding apparatus according to claim 1, further comprising stationary cam means for rotating said second angular position. 23. the second mold member is slidable in the direction of the longitudinal axis of the support member between an extended position and a retracted position;
During mold closing, the support member is advanced, forcing the second mold member into the retracted position, and during mold opening, the support member is retracted, thereby forcing the second mold member into the retracted position. the member is in the protruding position, and then the restricted member is in the second position.
Claim 1, wherein the second mold member is prevented from being brought into the retracted position by contact between the limiting member and the corresponding contact portion of the restricted member. 23. Compression molding apparatus according to item 22. 24. A compression molding apparatus according to claim 23, further comprising spring means for resiliently biasing said second mold member to said extended position. 25. The molded product to be compression molded is a container lid having a top wall and a cylindrical skirt wall depending from the periphery of the top wall, and one of the upper mold assembly and the lower mold assembly is , the distal end surface includes a mold member defining an outer surface of the top wall of the container lid, and when the mold means is closed, the mold member is forced in the closing direction with a predetermined pressure. The variation in the amount of synthetic resin material supplied to the mold means is
compensation by the retraction of the mold member from the protruding position against the required pressure, thus increasing the height of the container lid without changing the effective height from the inner surface of the top wall to the lower end of the skirt wall. Compression molding apparatus according to claim 1, wherein the compression molding apparatus is compensated by varying the thickness of the face wall. 26. The mold member is attached to the support member so as to be movable over a predetermined range in the direction of its longitudinal axis;
Spring means are disposed between the mold member and the support member for elastically biasing the mold member into a protruding position, and the required pressure when the mold means is closed is: 26. Compression molding apparatus according to claim 25, due to the elastic biasing force of said spring means. 27. The compression molding apparatus according to claim 26, wherein the spring means comprises a plurality of laminated disc springs. 28. The mold means in the rotary compression means is such that when the mold means is released, the molded article is separated from the lower mold assembly, and then the molded article is removed from the upper mold assembly in the molded article discharge area. The molded product is separated from the molded product and allowed to fall, and the molded product discharging means has an upstream end located between the upper mold assembly and the lower mold assembly in the molded product discharge area. and a rotary transfer mechanism having at least one arm for transferring the molded product that has fallen onto the upper end of the ejecting chute to the downstream side, the upper end of the ejecting chute has a plurality of suction holes formed therein, and is provided with suction means for sucking air downward through the suction holes;
A compression molding apparatus according to claim 1. 29. The compression molding apparatus according to claim 28, wherein the suction means includes a suction chamber attached to the lower surface of the upstream end of the discharge chute.