JP2005319667A - Method and apparatus for correcting bending of molten resin, and method and apparatus for supplying molten resin lumpy material to female mold recessed part - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To correct the bending of a resin in a molten state extruded from an extrusion die head to accurately insert and supply a drop (the molten lumpy material of a synthetic resin molding material) in the female mold recessed part (female mold cavity) of a molding machine. <P>SOLUTION: A resin flow control pin is inserted in the resin route of the extrusion die head of an extruder and the flow of the resin is controlled by adjusting the position of the resin flow control pin to correct the bending of the resin in the molten state extruded from the extrusion opening part formed to the leading end of the extrusion die head. Then, the synthetic resin in the molten state extruded from the extrusion opening part is cut by a cutter to be formed into a definite amount of a drop and this drop is inserted and supplied in the female mold recessed part. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method and apparatus for correcting the bending of an extruded molten resin, and a method and apparatus for supplying a drop (a molten lump of synthetic resin molding material) to a molded female recess, and more specifically, a molten state extruded from an extrusion die head Relating to the bending of the resin, mainly relating to each method and the apparatus used for those methods, which are precisely inserted and supplied into the female recess (female cavity) of the molding device that rotates and moves the drop It is.

Recently, there has been a strong demand for a technology for supplying molding materials, which is the basis of plastic molding, for high productivity, remarkable economic efficiency, and excellent precision and simplicity.
The production of preforms, which is typical as a molding material supply technology, was mainly molded by multi-molding molds by the injection molding method. A better manufacturing method has been desired for the shift to low-temperature molding.
On the other hand, for example, compression molding machines have been used for a long time as low-cost and low-temperature molding equipment, but in order to increase their mass productivity and improve manufacturing efficiency, a large number of molding dies are attached to a rotating disk. A rotary compression molding machine (rotary compression molding machine) was developed and adopted. In preform molding, a material production method using an extrusion method and a production method using this rotary compression molding machine are employed (see Patent Document 1), and the production efficiency is dramatically improved by employing a rotary compression molding machine. Recently, the molding method by extrusion compression molding is regarded as the most important for preform production.

The compression molding method (or molding device) is a very excellent molding method from the aspect of economic efficiency and production efficiency, but the molten drop extruded from the extrusion die head (the molten lump of synthetic resin molding material), Precise material insertion into the female recess (female cavity) of the rotating compression molding machine is necessary. If it is not accurate, a part of the drop may protrude from the cavity to obtain a precise preform. Can not.
Therefore, a technique for making this insertion more accurate is important, and as this technique, an improved technique for installing an inverted frustum-shaped synthetic resin guide means having a guide opening at the drop drop point has been disclosed ( However, the improved technology has not been disclosed yet.

: JP 2000-25729 A (Claims 1 and 1 of the claims) : JP 2000-280248 A (Claims 1, 1, and 5 of claims)

  As described above in paragraph 0003, there is a strong demand for high productivity, remarkable economic efficiency, excellent precision and simplicity in the molding material supply technology that is the basis of plastic molding. In the method of supplying the molten drop extruded from the extrusion die head to the molding apparatus, which is regarded as most important for realizing the above, the molten drop extruded from the extrusion die head is rotated and moved. It is necessary to accurately insert and supply into the female concave portion of the molding apparatus. If it is not accurate, a part of the drop protrudes out of the cavity and a molded product such as a precise preform cannot be obtained. In particular, when the difference between the maximum outer diameter of the drop and the inner diameter of the female recess is relatively small, or when the moving speed of the drop holding mechanism is increased, the drop is displaced from the required position of the female recess. Tend to be dropped.

  In order to more accurately supply the molding material, even when the difference between the maximum outer diameter of the drop and the inner diameter of the female recess is smaller, or even when the moving speed of the drop holding means is increased, Furthermore, even if the molding cycle such as increasing the rotational speed of the rotary compression molding machine is made higher, the drop is not displaced and dropped from the required position of the female recess, so that the drop can be inserted more accurately. With the aim of developing improved technology that can be executed quickly, the present inventors have sought to find a method for more accurately supplying molding materials, and in the process of thinking search and experimental investigation, When supplying a molten drop extruded from the mold to the molding device, the molten resin extruded from the opening may be bent before being cut into drops. Knowing that the bending prevents accurate cutting into the drop and accurate insertion of the drop into the molded female mold, correcting this bending can contribute to accurate insertion of the drop into the molded female mold. I came to realize that.

  Therefore, when the molten drop extruded from the opening of the extrusion die head is supplied to the mold of the molding apparatus, the molten resin extruded from the extrusion opening often occurs before being cut into drops. It is an object of the present invention to solve the problem of correcting the bending and contributing to accurate cutting into the drop and accurate insertion of the drop into the formed female die.

  The inventors of the present application aim to solve this problem and contribute to accurate cutting into the drop and accurate insertion of the drop into the female mold, and the molten resin extruded from the extrusion opening is dropped. The cause of the bending that often occurs before cutting and the tendency of the bending are examined in detail, and the fluidity of the molten resin, the viscosity of the resin in the extrusion die head, the shape of the resin flow path, the extrusion discharge pressure and the discharge speed Furthermore, as a result of repeated multifaceted considerations and experimental studies on the type of resin and the like, a technique capable of accurately and simply correcting the bending of the molten resin can be found, leading to the creation of the present invention.

  The inventors of the present application recognize that the bending of the molten resin extruded from the extrusion opening is most closely related to the fluidity (flow rate, flow rate, etc.) of the resin in the extrusion die head. As a result of various trials based on various trials, it is understood that if the flow rate and flow rate of the resin in the extrusion die head are controlled through various measures, the bending of the extruded molten resin can be remarkably corrected. As a specific means of controlling the flow rate, it is clarified that the method of controlling the fluidity such as the flow rate and flow rate of the resin in the extrusion die head by providing a flow adjustment pin in the molten resin path in the extrusion die head is clarified. I was able to.

Position of the resin flow control pin installed in the resin path of the extrusion die head in order to control flowability such as the flow rate and flow rate of the resin in the extrusion die head by providing a flow adjustment pin in the molten resin path in the extrusion die head Thus, the resin flow path width may be changed, whereby the bending of the molten resin extruded from the opening can be corrected, preferably straightened.
According to this method, since the position of the die discharge side is not adjusted and the end surface of the resin discharge port does not move, the resin discharge position does not change, and the position of the cutting tool (cutter) and holding tool to the drop is also adjusted. There is no need. Further, since the outer end face of the resin flow path is not unnecessarily bent, the resin does not bend again, it is easy to adjust the flow state of the resin, and the resin is not easily distorted.
In particular, as a mode of use of this technique, the molten synthetic resin extruded from the extrusion opening is held or cut or cut by the holding mechanism at the synthetic resin receiving position facing the extrusion die head and a cutting tool attached thereto. The drop is held in a fixed amount, the drop is held and conveyed by the holding mechanism, and the drop held at the discharge position on the molding female mold is released and inserted into the molding female mold recess and supplied. When a continuous supply system is used, if the molten resin is bent, the drop formation due to the molten resin cutting becomes inaccurate and unstable, and the holding state by the holding mechanism of the cut drop varies, This may cause inaccurate insertion of the drop into the mold, and part of the drop may protrude from the female recess of the mold. Although shape obstruct, since bending is corrected, no longer be such a problem occurs.

To change the resin flow path width depending on the position of the resin flow control pin installed in the resin path of the extrusion die head, for example, a cylindrical resin flow control pin installed in the cylindrical resin path of the extrusion die head Is adjusted with an adjustment bolt to change the resin flow path width in the orthogonal direction in the cylindrical vertical resin path.
Once the position of the resin flow control pin is adjusted with the adjustment bolt and the position is recorded on the adjustment bolt, if the same raw material resin is supplied as a drop under the same supply conditions, the resin flow control pin is re-applied. No position adjustment is required.
In the actual manufacturing process, in order to grasp the bent state of the molten resin extruded from the opening, for example, the bent state of the molten resin may be monitored from the bottom with a camera, and an adjustment pin corresponding to the bent state Can be adjusted.

  In the present invention outlined in paragraphs 0010 to 0011, there are many methods and apparatuses that correct the bending of the molten resin extruded from the extrusion die head and accurately insert and supply the drop into the female recess of the molding apparatus. In particular, when a drop is continuously supplied to the concave portion of the molded female mold using a rotary movable drop supply body having a holding mechanism and a rotary movable compression molding machine having a large number of molds composed of male and female molds. It can be used suitably and efficiently. Further, in this case, it can be most suitably used for continuously molding a large number of preforms for blow molding to produce a container or the like.

  In the above, the background of the creation of the present invention, and the basic configuration and features of the present invention have been described in general. Here, when overviewing the present invention as a whole, the present invention comprises the following invention unit groups: The inventions [1] and [2] are used as basic inventions, and other inventions embody the basic inventions or embodiments.

[1] When discharging a synthetic resin in a molten state extruded from an extrusion opening formed at the tip of an extrusion die head in an extruder, a resin flow control pin is inserted into the resin path of the extrusion die head, A method of correcting the bending of the molten resin extruded from the extrusion opening by adjusting the position and controlling the flow of the resin.
[2] A resin flow control pin is inserted and mounted in the resin path of the extrusion die head in the extruder, and is formed at the tip of the extrusion die head by adjusting the position of the resin flow control pin to control the resin flow. A device that corrects the bending of molten resin extruded from the extrusion opening.
[3] When the molten synthetic resin extruded from the extrusion opening formed at the tip of the extrusion die head in the extruder is cut with a cutting tool to form a fixed amount of drop, and inserted into a formed female mold recess and supplied. In addition, a resin flow control pin is inserted and installed in the resin path of the extrusion die head, and by adjusting the position of the resin flow control pin and controlling the flow of the resin, bending of the molten resin extruded from the extrusion opening is suppressed. A method or apparatus for supplying a drop to a molded female recess, characterized by correcting.
[4] The molten synthetic resin extruded from the extrusion opening is held by the holding mechanism at the synthetic resin receiving position facing the extrusion die head and the cutting tool attached thereto, and cut or cut and held to drop a fixed amount. Nonetheless, the drop is held and conveyed by the holding mechanism, and the drop held at the discharge position on the forming female die is inserted into the concave portion of the forming female die while being released, and then supplied [3 ] The method or apparatus which supplies the drop in a shaping | molding female recessed part.
[5] The resin flow path width is changed according to the position of the resin flow control pin installed in the resin path of the extrusion die head to correct the bending of the molten resin extruded from the extrusion opening. , [1] to [4], a method or apparatus for correcting the bending of the resin, or a method or apparatus for supplying a drop to a molded female recess.
[6] The position of the cylindrical resin flow control pin installed in the cylindrical resin path of the extrusion die head is adjusted by an adjustment bolt, and the resin flow path width in the orthogonal direction in the cylindrical vertical resin path is adjusted. The method or apparatus for correcting the bending of the resin according to [5], wherein the bending of the molten resin extruded from the extrusion opening is corrected by making the flow state of the resin uniform by changing Alternatively, a method or apparatus for supplying a drop to a molded female recess.
[7] The position of the cylindrical resin flow control pin that provides the resin flow path width in the orthogonal direction of the cylindrical resin path to equalize the flow state of the resin is recorded as the position of the adjustment bolt. [6] A method or apparatus for correcting the bending of the resin, or a method or apparatus for supplying a drop to a molded female recess.
[8] The resin according to [6], wherein the bent state of the molten resin extruded from the extrusion opening is monitored by a camera from below and the position of the control pin is adjusted in accordance with the bent. A method or an apparatus for correcting the bending of the above, or a method or an apparatus for supplying a drop to a molded female recess.
[9] Using a rotary movable type drop feeder having a large number of holding mechanisms and a rotary type movable compression molding machine having a large number of molds made of molded male and female molds, supplying a drop to the concave portion of the molded female mold A method or apparatus for supplying the drop according to any one of [3] to [8] to the molded female recess.
[10] A method or apparatus for supplying the drop in [9] to the molded female recess, which is made to continuously mold a large number of preforms.

The bending of the molten resin extruded from the extrusion die head can be corrected by an economical method, and the drop can be accurately inserted into the female recess (female cavity) of the molding apparatus and supplied. And thereby uniform and precise molding can be performed.
In particular, even if the difference between the maximum outer diameter of the drop and the inner diameter of the female recess is smaller by using a rotating molding device, or even when the moving speed of the drop holding means is increased, Even if the molding cycle such as increasing the rotational speed of the rotary molding device is made higher, the drop is not displaced and dropped from the required position of the female recess, and the insertion of the drop is more accurate and It becomes possible to execute quickly.
In addition, since the flow side of the resin is controlled by the flow control pin and the position of the die side is not adjusted, the end face of the resin discharge port does not move, so the resin discharge position does not change, and the cutting tool and holder of the drop are not changed. There is no need to adjust the position. Further, since the outer end face of the resin flow path is not unnecessarily bent, the resin does not bend again, it is easy to adjust the flow state of the resin, and the resin is not easily distorted.

The invention of the present application has been described in accordance with the basic configuration of the invention of the present application as a means for solving the problem. In the following, the embodiment of the invention of the invention of the present application will be described with reference to the drawings. Will be described in detail.
The present invention relates to a method and apparatus for correcting the bending of molten resin extruded from an extrusion die head, as described above in paragraphs 0010 to 0011, and more particularly, when supplying a drop to a molded female recess. A method of correcting and bending the molten resin extruded from the die head, cutting the molten resin accurately to form a drop, and accurately inserting and supplying the drop into a female recess of a molding apparatus that rotates and moves the drop It relates to the apparatus used in the method.

1. Basic configuration of the present invention (resin bending correction method and apparatus)
The basic structure of the present invention is the heating which is extruded from the extrusion opening 22 formed at the tip of the extrusion die head 20 in the extruder, referring to the embodiment of FIG. 2 (the upper diagram is a plan view and the lower diagram is a front sectional view). When the thermoplastic synthetic resin 23 in a molten state represented by polyethylene terephthalate which has been softened and melted by plasticization is discharged, a resin flow control pin 24 is inserted into the resin path 21 of the extrusion die head, and the resin flow control pin The present invention is a resin bending correction method and an apparatus for carrying out the method, wherein the bending of the molten resin extruded from the extrusion opening is corrected by adjusting the position and controlling the flow of the resin.
The bending of the molten resin extruded from the opening is illustrated in FIG. 1, and in FIG. 2, by controlling the resin flow by adjusting the position of the resin flow control pin and shifting the position of the pin, The bending of the molten resin is straightened.

2. Drop supply method and apparatus The drop supply method and apparatus of the present invention are similar to the above-described method and apparatus for correcting the bending of the resin, as shown in FIGS. Specific examples of the method and apparatus are described, and the molten synthetic resin 23 extruded from the extrusion opening 22 formed at the tip of the extrusion die head 20 in the extruder is cut by a cutting tool and a fixed amount is dropped. And a method and apparatus for supplying the resin by inserting it into the concave part of the molded female mold, wherein a resin flow control pin 24 is inserted and installed in the resin path 21 of the extrusion die head, and the position of the resin flow control pin is adjusted to adjust the resin flow. And a device for supplying a drop to a molded female recess, wherein the bending of the molten resin extruded from the extrusion opening is corrected by controlling the flow of the resin It is.
As described above, the drop is a synthetic resin molding material molten lump for molding, but is usually a solid molten lump.

3. Cutting and holding into a drop After correcting the bending of the molten resin extruded from the extrusion opening, as illustrated in FIG. 3 (front sectional view) and FIG. Cutting and holding are performed.
In FIG. 3, the synthetic resin in a molten state extruded from the extrusion opening 31 of the die head 30 of the extruder is held by a holding mechanism 32 at a synthetic resin receiving position facing the extrusion die head and a cutting tool 35 attached thereto. Cutting or cutting and holding to make a fixed amount of drop 37, the drop is sandwiched and held by the fixing mechanism 33 and the pressing tool 34 of the holding mechanism, and the lowering of the lifting block 36 on the drop dropping position and at the same time The drop 37 is dropped by the backward movement of the pressing tool 34 due to the backward movement of the forward / reverse cam 38. The raising and lowering of the elevating block 36 and the forward and backward advancement of the forward and backward advance cam 38 are performed by driving along the linear guide 39. Note that the molten resin may be held by a holding mechanism and then cut to form a drop, or the cut and formed a drop and then held by a holding mechanism.

Further, as illustrated in FIG. 5, when using a compression molding apparatus, the molten resin extruded from the extrusion die head 50 of the extruder is cut by the cutting tool 52 at regular time intervals and held by the holding mechanism 51. The fixed amount of drop 53 is held and conveyed by the conveying tool 54 to the molding die 55, and the drop held at the discharge position on the female die 56 is inserted into the molding female mold recess and released. . The mold is composed of a female mold 57 and a male mold 57 that are coaxially arranged in the vertical direction and can be opened and closed. The female mold is fixed to the rotating base and has a cavity that matches the outer shape of a molded product such as a preform. The male mold can be moved up and down by a hydraulic mechanism or the like, and a driven mold 58 is attached to the upper part of the male mold to form the top surface of the molded product.
Next, the cavity is clamped, the male mold and the driven mold descend, the molten resin fills the molding space defined by the male and female molds, and the molded product is molded after pressing for a fixed time at a fixed temperature. . After the mold is cooled, the mold is opened, the male mold is raised, and the molded product is extracted from the cavity together therewith.

4). Correction of the bending of the molten resin The molten synthetic resin flowing through the extrusion die head in the extruder is the presence of a right-angled bent portion of the resin flow path in the extrusion die head illustrated in FIG. Various factors such as non-uniform flow rate, flow characteristics depending on the type and viscosity of the molten resin, fluctuations in the discharge pressure and discharge speed of the extruder, fluctuations in the resin discharge amount and resin flow rate, and fluctuations in the die head temperature As a result, the resin flow tends to be turbulent from laminar flow to turbulent flow, which often causes bending in the molten resin extruded from the extrusion opening.
In the illustration of FIG. 1, a 10 mm wide bend occurs with respect to the resin discharge length of 60 mm. (Because this bent portion in the figure is described with the bend emphasized, the scale of the bent width does not match the scale of the resin flow path portion in the figure.)
If the molten resin bends, the cutting into the drop becomes inaccurate and unstable, and the holding state by the holding mechanism of the cut drop varies, which causes the drop to be inserted into the mold. It becomes inaccurate, and a part of the drop may protrude from the female concave portion of the mold, preventing precise and uniform molding.
Therefore, when the molten resin extruded from the extrusion opening is made into a drop and the drop is supplied to the molded female recess, it is indispensable to correct the bending of the molten resin extruded from the extrusion opening. .

The bending of the molten resin extruded from the extrusion opening is closely related to the flowability (flow rate, flow rate, etc.) of the resin in the extrusion die head. It is possible to remarkably correct the bending of the molten resin.
Specifically, referring to FIG. 2, correction of the bending of the molten resin is performed by providing flow path adjustment pins 24 in the molten resin path 21 in the extrusion die head 20, and the flow rate and flow rate of the resin in the extrusion die head. The method of controlling the fluidity of the resin is optimal, and the resin flow path width is determined by the position of the resin flow control pin (a shape such as a cylindrical shape or a spindle shape) installed in the resin path of the extrusion die head. By changing the flow rate of the resin to make it uniform, the bending of the molten resin 23 pushed out from the opening is efficiently and straightened.

5). Position adjustment by adjusting bolt In order to change the resin flow path width according to the position of the resin flow control pin installed in the resin path of the extrusion die head, for example, as illustrated in FIG. 2, the cylindrical shape of the extrusion die head The position of the cylindrical resin flow control pin installed in the resin path may be adjusted with the adjustment bolt 25 to change the resin flow path width in the orthogonal direction in the cylindrical vertical resin path. The resin path is not limited to a cylindrical shape, and the resin flow control pin is preferably a spindle shape as illustrated.
Basically, as shown in the upper diagram of FIG. 2, the resin flow control pin is manually positioned by four adjustment bolts, but may be three adjustment pins, and the resin bend is positioned. Automatic adjustment control may be performed by monitoring as data.
In practice, the bending is usually corrected by increasing the resin flow path width in the die head on the resin bending direction side, but it is considered that more resin flows out to the direction side.
1 and 2, the resin path width, the diameter and length of the resin flow control pin, the diameter of the molten resin to be extruded, and the bending amount are illustrated as numerical values.

6). Recording the adjustment position of the resin flow control pin The flow of the resin is made uniform, the resin flow path width in the orthogonal direction of the cylindrical resin path is brought, the position of the resin flow control pin is adjusted once with the adjustment bolt, If the position is recorded on the adjustment bolt, when the same raw material resin is discharged under the same supply condition, the position adjustment of the resin flow control pin again becomes unnecessary.

7). Understanding the bent state In the actual manufacturing process, the bent state of the molten resin extruded from the opening can be monitored by, for example, monitoring the bent state of the molten resin from the bottom with a camera. The position of the control pin can be adjusted accordingly.
The bending of the resin may be monitored as position data, and automatic control by interlocking with the adjustment bolt may be performed.

8). Use in rotary compression molding apparatus In the present invention, the resin flow control pin is inserted into the resin path of the extrusion die head and the position of the resin flow control pin is adjusted to control the resin flow, thereby extruding from the extrusion opening. The method for correcting the bending of the molten resin, which is preferably combined with a rotary compression molding apparatus, can realize high productivity, excellent economy and precision molding in plastic molding.
Specifically, as illustrated in FIG. 4, a rotary movable type drop supply body 41 having a large number of drop holding mechanisms 45 and a rotary movable type compression having a large number of molds 46 formed of male and female molds. Using the molding machine 42, a fixed amount of drop is supplied to the molding female mold recess. The molten resin flows out from the extrusion opening 44 of the extrusion die head 43 in the extruder 40, and after molding, the molded product is discharged by the discharger 47.

9. Continuous molding of a large number of preforms In the present invention, the method of correcting the bending of the extruded molten resin is used to produce containers and the like by blow molding when used in a rotary compression molding apparatus. In order to continuously form the preform, it can be most suitably used.

In the following, the present invention will be further described in the examples. Obviously, the present invention is not limited to the embodiments.
Molding was performed using the molding apparatus presented in FIGS. 2 to 5 exemplifying a preferred embodiment of the present invention. (In addition, a code | symbol is a number in a figure.)
1 and FIG. 2, the synthetic resin molding material heated and melted by the extruder is discharged from the main body of the extruder, and the molten synthetic resin is extruded by the gear pump. It was fed to the resin flow path of the die head 20 and extruded from the extrusion opening 22.
The resin used was polyethylene terephthalate, the melt viscosity was 1,500 to 2,000 poise, the discharge rate was 300 kg / hr, and the resin temperature was 280 to 285 ° C.
Since the melted synthetic resin extruded from the extrusion opening has been bent as shown in FIG. 1, the adjusting bolt 25 is used in the resin path 21 of the extrusion die head as shown in FIG. By moving the position of the installed spindle type resin flow control pin 24 and changing the resin flow path width, the resin flow path width in the die head on the side of the resin bending direction is widened (shown in FIG. 2). When the resin flow state is made uniform, the bending of the molten resin 23 pushed out from the opening is efficiently and straightened straightforwardly. .
In the above examples, polyethylene terephthalate was used as the resin, but other applicable resins include polybutylene terephthalate, polyethylene naphthalate, polycarbonate, polyarylate, polylactic acid, acrylonitrile resin, polypropylene, polypropylene-ethylene copolymer. Examples thereof include polyethylene and polyethylene.

It is front sectional drawing which illustrates the bending of resin of the molten state extruded from the extrusion opening part of an extrusion die head. It is front sectional drawing which illustrates correction | amendment of the bending of resin of a molten state in this invention. It is a schematic front view which shows the structure part which makes the cutting | disconnection of molten resin extruded, and holding | maintaining a drop. It is a top view which illustrates a continuous system of drop formation, conveyance, and drop supply to a forming device. It is a front schematic diagram which illustrates drop formation, conveyance, drop supply to a metal mold, and compression molding.

Explanation of symbols

20: Extrusion die head 21: Extrusion die head resin path 22: Extrusion opening 23: Molten synthetic resin 24: Resin flow control pin 25: Adjustment bolt 30: Extruder die head 31: Extrusion opening 32: Holding mechanism 33: Fixing tool 34: Pressing tool 35: Cutting tool 36: Elevating block 37: Drop 38: Forward / reverse cam 39: Linear guide 40: Extruder 41: Rotary movable drop feeder 42: Rotary compression molding machine 43: Extrusion die head 44: Extrusion opening 45: Holding mechanism 46: Molding die 47: Ejector 50: Extrusion die head 51: Holding mechanism 52: Cutting tool 53: Fixed amount drop 54: Conveying tool 55: Molding die 56: Female die 57: Male 58: Follower

Claims (10)

When discharging the molten synthetic resin extruded from the extrusion opening formed at the tip of the extrusion die head in the extruder, the resin flow control pin is inserted into the resin path of the extrusion die head to adjust the position of the resin flow control pin. And correcting the bending of the molten resin extruded from the extrusion opening by controlling the flow of the resin. The resin flow control pin is inserted and mounted in the resin path of the extrusion die head in the extruder, and the extrusion opening formed at the tip of the extrusion die head is controlled by adjusting the position of the resin flow control pin and controlling the resin flow. A device that corrects the bending of molten resin that is extruded from the surface. When the synthetic resin in the molten state extruded from the extrusion opening formed at the tip of the extrusion die head in the extruder is cut with a cutting tool to form a fixed amount of drop, it is extruded when inserted into the female mold recess and supplied. The resin flow control pin is inserted and installed in the resin path of the die head, and the bending of the molten resin extruded from the extrusion opening is corrected by adjusting the position of the resin flow control pin and controlling the flow of the resin. A method or apparatus for supplying a drop to a molded female recess. The molten synthetic resin extruded from the extrusion opening is held by the holding mechanism at the synthetic resin receiving position facing the extrusion die head and the cutting tool attached thereto, and cut or cut and held to make a quantitative drop, 4. The drop is held and conveyed by a holding mechanism, and the drop held at the discharge position on the forming female mold is inserted into the forming female recess while being released, and then supplied. Or apparatus for supplying the formed drop to the molded female recess. The resin flow path width is changed according to the position of the resin flow control pin installed in the resin path of the extrusion die head, and the bending of the molten resin extruded from the extrusion opening is corrected. A method or apparatus for correcting the bending of the resin according to any one of claims 1 to 4, or a method or apparatus for supplying a drop to a molded female recess. The position of the cylindrical resin flow control pin installed in the cylindrical resin path of the extrusion die head is adjusted with an adjustment bolt to change the resin flow path width in the orthogonal direction in the cylindrical vertical resin path. The method or apparatus for correcting the bending of the resin according to claim 5, wherein the bending of the molten resin extruded from the extrusion opening is corrected by homogenizing the flow state of the resin. Alternatively, a method or apparatus for supplying a drop to a molded female recess. The position of a cylindrical resin flow control pin that provides a resin flow path width in a direction orthogonal to a cylindrical resin path that equalizes a resin flow state is recorded as a position of an adjustment bolt. 6. A method or apparatus for correcting the bending of the resin described in 6 or a method or apparatus for supplying a drop to a molded female recess. The resin according to claim 6, wherein the bent state of the molten resin extruded from the extrusion opening is monitored by a camera from the bottom, and the position of the control pin is adjusted according to the bent. A method or an apparatus for correcting the bending of the above, or a method or an apparatus for supplying a drop to a molded female recess. Using the rotary movable drop supply body having a large number of holding mechanisms and the rotary movable compression molding machine having a large number of molds made of molded male and female molds, the drop is supplied to the molded female mold recess. A method or an apparatus for supplying the drop according to any one of claims 3 to 8 to the molded female mold recess. 10. A method or apparatus for feeding a drop according to claim 9 to a molded female recess, wherein said drop is made to continuously mold a number of preforms.

Images