JPH04107026U - Vertical injection blow molding machine - Google Patents

Abstract

(57) [Summary] [Purpose] To simultaneously produce many types of molded products using one device. [Structure] It has a slide base 18 that slides between one injection molding position and a plurality of blow molding positions, and a lower mold 19 for parison, and the lower mold 19 for parison is in the injection molding position. Injection molding is performed at times, and blow molding is performed at each blow molding position. An upper mold 6 is disposed at the injection molding position, and the lower mold 1 for parison is disposed at the injection molding position.
A means for opening and closing the upper mold 9 and the upper mold 6, and an injection device for filling resin are provided. A blow mold 23 is disposed at the blow molding position, and includes means for opening and closing the parison lower mold 19 and the blow mold 23, and a blow unit 33.
A blow mold slide device 32 is provided. Therefore, manufacturing costs when molding many types of molded products can be reduced, and two or more types of molded products can be simultaneously produced with one injection molding machine.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a vertical injection blow molding machine.

0002

[Conventional technology]

Traditionally, air is blown into the parison to perform hollow molding, and the parison is molded to fit the shape of the mold. When making molded products, we mainly use extrusion blow molding methods, injection blow molding methods, and cold molding methods. There are three types of parison forming methods. For example, in the case of extrusion blow molding, molten resin is passed through an extruder into a tube shape. Extrude and press and blow the tube with a mold. i.e. extruded between open molds After extruding the parison from the machine, move the mold to sandwich the parison and place it under the parison. The parts are pinched off and fused together, and air is blown into the inside of the parison to cool it down. Then, open the mold and take out the molded product.

0003 Methods for extruding the parison include screw type, ram type, accumulator type, There are screw in-line types, etc. In the case of the screw type, the rotation of the screw releases the resin. It is extruded while melting, and is the most commonly used method. Ram type is Ram While supplying resin into the cylinder by reciprocating, melted plasticized resin is intermittently supplied. Although the structure is simple, the plasticization is not uniform, so it is almost impossible to Not used. In addition, the accumulator type uses plasticized wood by rotating the screw. After fat has accumulated in the ram cylinder or accumulator head, the ram or plunger This method extrudes the required amount of resin at high speed, and drawdown becomes a problem. Used for blow molding large molded products and engineering plastics. The screw in-line type is similar in function to the accumulator type, with a screw cylinder acts as an accumulator, and the screw acts as a ram.

0004 Next, in the case of the injection blow molding method, the parison is made by injection molding and then Turn over and blow with a blow mold. In other words, a test tube with a bottom is made by injection molding. After forming the parison, the parison is heated and kept in a semi-molten state, and the parison is Blow molding is performed by blowing air into the mold. The cavity is integrated. Depending on the type of mold, they are divided into integral cavity type molding machines and split cavity type molding machines. classified.

[0005] The above injection blow molding method has the following characteristics compared to the extrusion blow molding method. . First, since the parison is formed by injection molding, the wall thickness of the parison can be controlled. It is easy to mold, and it is possible to obtain highly accurate molded products with less uneven thickness. Also, The mouths of containers, etc. are also molded during injection molding, so it is possible to form high-precision mouths and threaded parts. can be achieved. Furthermore, since there are no burrs, there is no need for post-finishing, and the bottom Since there is no pinch-off, it is also advantageous in terms of strength.

[0006] On the other hand, many molds are required, and high precision is required. Mold costs will increase. In the case of the cold parison molding method, only the parison is injection molded, and the Blow molding at any time after. That is, a parison formed by an extruder The parison molded by an injection molding machine is cooled to room temperature, and then At this point, it is reheated and blow molded in a blow mold.

[0007]

[Problem that the idea aims to solve]

However, in the vertical injection blow molding machine with the above configuration, all It is possible to produce only one type of molded product depending on the machine, and it is not possible to produce many types of molded products. Products cannot be produced at the same time. This invention solves the problems of the conventional vertical injection blow molding machine and integrates it into one machine. Therefore, we provide a vertical injection blow molding machine that can produce many types of molded products at the same time. The purpose is to

[0008]

[Means to solve the problem]

Therefore, in the vertical injection blow molding machine of the present invention, there is only one injection molding position. a slide base that slides between a plurality of blow molding positions; It has a lower mold for a parison that is attached to the top of the base, and the lower mold for the parison is provided. The mold is selectively moved between an injection molding position and multiple blow molding positions.

[0009] At the above injection molding position, an upper mold is installed facing the lower mold for the parison. Means for opening and closing the lower mold and upper mold for parison, and the lower mold and upper mold for parison. An injection device is provided for filling resin between the molds. In addition, at the above blow molding position, there is a blow mold facing the above parison lower mold. means for opening and closing the parison lower mold and the blow mold; A blow unit for blowing air into the mold and a blow mold for separating the blow mold. A blow mold slide device is provided.

0010

[Effect]

According to the present invention, as mentioned above, between one injection molding position and multiple blow molding positions, A slide base that slides and moves, and a The parison lower mold has one injection molding position. and selectively move multiple blow molding positions. In other words, the lower mold for the parison is Injection molding occurs when in the exit molding position, and blow molding occurs when in each blow molding position. The shape is done.

[0011] At the above injection molding position, an upper mold is placed opposite the lower mold for the parison. means for opening and closing the lower mold and upper mold for the parison, and the lower mold for the parison. An injection device is provided for filling resin between the mold and the upper mold. Therefore, the upper mold The mold moves downward and closes against the lower mold for the parison, and when the mold is clamped, the injection molding It is then filled with resin and molded into a parison.

0012 In addition, at the above blow molding position, there is a blow mold facing the above parison lower mold. means for opening and closing the parison lower mold and the blow mold; A blow unit for blowing air into the mold and a blow mold for separating the blow mold. A blow mold slide device is provided. Therefore, molding at the injection molding position When the parison is moved to the blow molding position, the blow mold moves downward. When the mold is closed and the mold is clamped, air is pumped into the parison from the blow unit. It is blown out and blow molded.

[0013] When the blow molding is finished, the blow mold is raised and opened, and the blow mold is opened. The slide device operates to separate the blow mold and take out the molded product.

[0014]

【Example】

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Figure 1 is a front view of the vertical injection blow molding machine of the present invention, and Figure 2 is the vertical injection blow molding machine of the present invention. FIG. 3 is a plan view of the forming machine. In the figure, 1 is a vertical injection molding machine with a mold clamping mechanism and an injection mechanism arranged vertically. It is. A movable platen is placed above the fixed platen, and injection is performed from above or from the side. Injection molding can be performed by filling the resin with the nozzles for the resin in close proximity. 2 is above Hopper for supplying resin for vertical injection molding machine 1, 3 for injecting molten resin This is an injection nozzle of an injection device for 5 is supported movably in the vertical direction. This is a movable platen, and an upper mold 6 is attached to the movable platen 5. The above is possible Mold opening/closing means for moving the movable platen 5 up and down to close, clamp, and open the mold. is provided.

[0015] The vertical injection molding machine 1 having the above configuration is installed on a base 8. Perform injection on 8. Further, a top plate 9 extending rearward is formed on the base 8. At the same time, a bracket 11 is attached to the side part, and a first bracket is attached to the top plate 9. A blowing device 12 and a second blowing device 13 are disposed on the bracket 11. Reference numeral 15 denotes a first part forming a sliding surface between the vertical injection molding machine 1 and the first blowing device 12. 1 slide device 16 is a slide device 16 for sliding between the vertical injection molding machine 1 and the second blow device 13. This is a second slide device that forms a moving surface. And the first and second slides above A slide base 18 moves over the devices 15 and 16.

[0016] A lower parison mold 19 is mounted on the slide base 18. Applicable The lower mold 19 for parison has the slide base 18 connected to the vertical injection molding machine 1, the first It moves as it moves between the blowing device 12 and the second blowing device 13, and the vertical When moved to the position of the mold injection molding machine 1, it is placed in a position facing the upper mold 6. . Then, injection molding is performed by the vertical injection molding machine 1, and the upper mold 6 and the A parison 21 is formed between the lower molds 19 for lithon.

[0017] The parison lower mold 19 is located at the position of the first and second blowing devices 12 and 13. When moved to , it is placed in a position facing the blow mold 23. The blow mold 23 is A mold clamping device 3 for blow molding is provided for blow molding the parison 21. 1 to move up and down to close, clamp, and open the mold. Also, blow mold 23 is opened and closed by operating the blow mold slide device 32. the above A blow unit is used to blow air into the parison 21 housed in the blow mold 23. A cut 33 is provided.

[0018] Next, the operation of the vertical injection blow molding machine with the above configuration will be explained using Figs. 3 and 4 together. explain. Figure 3 is a state diagram of molding in a vertical injection molding machine, and Figure 4 is a diagram of molding in a blowing device. FIG. In FIG. 3, (A) shows the parison 21 being molded in the vertical injection molding machine 1. (B) shows the state with the parison 21 taken out. Also, in Figure 4 , (A) shows the state in which the blow mold 23 is set in the blow devices 12 and 13. (B) shows the state in which blow molding is being performed in the blowing devices 12 and 13, (C ) indicates the state in which the molded product is taken out.

[0019] First, the parison lower mold 19 is moved to the molding position of the vertical injection molding machine 1. Then, the upper mold 6 moves downward and comes into contact with the lower mold 19 for parison. For example, When molding a tor-shaped molded product, as shown in FIG. It has a corresponding recess and a sprue 40 for supplying resin is formed at the upper end. has been done. In addition, the parison lower mold 19 has neck molds 41 that can be separated on both sides. and a core mold 42 fixed to the slide base 18 (see FIG. 1). The core The mold 42 has a convex portion 43 having a shape corresponding to the parison 21 described above.

[0020] Then, when the mold is clamped by an injection molding mold clamping device (not shown), the injection Resin is injected from the outlet nozzle 3 and passes through the sprue 40 to the lower parison mold 19. and the space formed by the upper mold 6 is filled. After that, the filled resin is cooled. As shown in FIG. 3B, the upper mold 6 is raised and the parison 21 is taken out. At this time, the lower mold 19 for the parison maintains the state at the time of injection molding, and The core mold 42 remains housed within the tube 21.

[0021] Next, the above-mentioned parison 21 is placed on the slide base 18 with a blowing device. Move to either 12 or 13. In this case, the one moved to the blowing device 13 and explain. When the slide base 18 moves to the molding position of the blowing device 13, the blowing mold clamps. The device 31 operates to lower the blow mold 23. The blow mold 23 is shown in FIG. As shown in (A), it consists of two molds 23a and 23b, both molds 23a and 23b. , 23b come together to form a space with a shape corresponding to the molded product. ing. Then, the blow mold 23 is brought into contact with the parison lower mold 19, The blowing mold clamping device 31 performs mold clamping.

[0022] After the mold clamping is completed, as shown in FIG. 4(B), the blow unit 33 Air is blown into the core mold 42 of the parison lower mold 19 to perform blow molding. be exposed. During this time, the parison 21 is heated so that it can be easily deformed. It will be done. In this way, the parison 21 is deformed along the recess 45, and the molded product 46 is molded.

[0023] When the blow molding is completed, the neck mold 41 is removed as shown in FIG. 4(C). are separated, and the blowing mold clamping device 31 operates to raise the molds 23a and 23b. It is lifted up and the mold is opened. At this time, the molded product 46 rises together with the upper mold 23. Separate from the lower mold 19 for parison. Then, the blow mold slide device 32 moves. The molds 23a and 23b are separated into left and right parts, and the molded product 46 is taken out.

[0024] In this way, injection molding by the vertical injection molding machine 1 and blowing by the blowing device 13 are performed. – Molding takes place. Here, as mentioned above, since two blowing devices 12 and 13 are provided, The blow molds 23 in each of the blow devices 12 and 13 are made to have different shapes. If so, two types of molded products can be molded at the same time.

[0025] Note that the present invention is not limited to the above-mentioned embodiments, and may be modified based on the spirit of the present invention. Various modifications may be made, and these are not excluded from the scope of the present invention. do not have.

[0026]

[Effect of the idea]

As explained in detail above, according to the present invention, one injection molding position and a plurality of molding positions can be used. A slide base that slides between row molding positions; It has a lower mold for parison that is attached to the upper part, and there is one lower mold for parison. selectively move injection molding positions and multiple blow molding positions.

[0027] At the above injection molding position, an upper mold is installed facing the lower mold for the parison. Means for opening and closing the lower mold and upper mold for parison, and the lower mold and upper mold for parison. An injection device is installed to fill the space between the molds with resin, and an injection device is installed at the blow molding position. A blow mold is placed opposite the lower mold for the parison, and the lower mold for the parison is A means for opening and closing the mold and blow mold, and a blower for blowing air into the parison. - A blow mold slide device is provided to separate the unit and the blow mold mentioned above. It will be done.

[0028] Therefore, since the blow molding position is provided at a different position from the injection molding position, Blow molds can be easily replaced and are suitable for manufacturing when molding a wide variety of molded products. Cost can be reduced. In addition, the blow molds of the blow equipment at multiple blow molding positions are different. This makes it possible to simultaneously produce two or more types of molded products with one injection molding machine. can.

[Brief explanation of drawings]

FIG. 1 is a front view of a vertical injection blow molding machine of the present invention.

FIG. 2 is a plan view of the vertical injection blow molding machine of the present invention.

FIG. 3 is a state diagram of molding in a vertical injection molding machine.

FIG. 4 is a state diagram of molding in the blowing device.

[Explanation of symbols]

1 Vertical injection molding machine 2 hopper 3 Injection nozzle 5 Movable platen 6 Upper mold 8 base 9 Top plate 11 Bracket 12 First blow device 13 Second blow device 18 Slide base 19 Lower mold for parison 21 Parison 23 Blow mold 31 Mold clamping device for blowing 32 Blow mold slide device 33 Blow unit

Claims (1)

[Scope of utility model registration request] Claim 1: (a) a slide base that slides between one injection molding position and a plurality of blow molding positions;
(b) a lower mold for parison mounted on the slide base; (c) an upper mold disposed opposite to the lower mold for parison at the injection molding position; and (d) an upper mold for the parison. means for opening and closing the lower mold and the upper mold;
(e) an injection device for filling resin between the lower mold for parison and the upper mold; (f) a blow mold disposed opposite to the lower mold for parison at the blow molding position;
(g) means for opening and closing the parison lower mold and blow mold; (h) a blow unit for blowing air into the parison; and (i) a blow mold for separating the blow mold. A vertical injection blow molding machine characterized by having a slide device.