Mold equipment and injection blow molding equipment

Abstract

We provide injection blow technology that shortens the clamping device. [Solution] As shown in Figure 1(b), the injection blow molding apparatus 10 includes a clamping device 13, which consists of a fixed platen 14 and a pressure receiving platen 15 fixed to the bed 11, a tie bar 16 stretched between them, a movable platen 17 positioned between the fixed platen 14 and the pressure receiving platen 15 and guided by the tie bar 16, a toggle link mechanism 18 that moves the movable platen 17 starting from the pressure receiving platen 15, a turntable 21 attached to the movable platen 17 and rotated around a clamping shaft 19, and a mold device 30 attached to the turntable 21 and the fixed platen 14. The length L1 of the clamping device 13 in Figure 1(b) is sufficiently shorter than the length L10 in Figure 1(a).

Description

Technical Field

[0006] ,

[0001] The present invention relates to an injection blow molding technique for manufacturing blow molded products such as plastic bottles.

Background Art

[0002] Injection blow molding apparatuses for manufacturing blow molded products have utilized various structures (see Patent Document 1 (FIG. 1)).

[0003] Patent Document 1 will be described based on the following figure. [[ID=第十七]] FIG. 10(a) is a diagram for explaining the mold opening state of a conventional injection blow molding apparatus, and FIG. 10(b) is a diagram for explaining the mold clamping state.

[0004] As shown in FIG. 10(a), an injection blow molding apparatus 100 mainly includes a bed 101, an injection device 102 placed on the bed 101 for injecting molten resin, and a mold clamping device 103. The mold clamping device 103 includes a fixed plate 104 and a pressure receiving plate 105 fixed to the bed 101, tie bars 106 passed between them, a movable plate 107 arranged between the fixed plate 104 and the pressure receiving plate 105 and guided by the tie bars 106, a toggle link mechanism 108 for moving the movable plate 107 starting from the pressure receiving plate 105, an intermediate plate 111 arranged between the movable plate 107 and the fixed plate 104, a horizontal shaft 112 provided on this intermediate plate 111, and a core support plate 113 rotatably supported on the intermediate plate 111 via this horizontal shaft 112. The horizontal shaft 112 extends in the front-back direction of the drawing.

[0005] An injection mold 115 is provided on the fixed plate 104, a blow mold 116 is provided on the movable plate 107, and cores 117 are provided on both sides of the core support plate 113. In FIG. 10(a), the mold opening state is shown. The intermediate plate 111 is sufficiently separated from the injection mold 115, and the intermediate plate 111 is sufficiently separated from the blow mold 116. As a result, the core support plate 113 becomes rotatable. The rotation locus of the core support plate 113 becomes a turning circle 118.

[0006] The core support plate 113 is fixed at a predetermined angle (in this example, the angle at which the core 117 is horizontal), and the toggle link mechanism 108 moves the movable platen 107 to the fixed platen 104. This movement causes the core 117 to enter the injection mold 115 and then the blow mold 116. As a result, the mold clamping state shown in Figure 10(b) is achieved. In Figure 10(b), molten resin is injected into the injection mold 115 by the injection device 102 to obtain a parison. Compressed air is then blown into the parison in the blow mold 116 to perform blow molding. Next, the mold is opened as shown in Figure 10(a), and the blow-molded product is removed.

[0007] As a result, blow-molded products can be manufactured efficiently. However, there is room for improvement in the conventional injection blow molding apparatus 100. First, in order to avoid interference with the rotating circle 118, it is necessary to move the movable platen 107 far away from the fixed platen 104, which increases the overall length of the clamping device 103.

[0008] This type of injection blow molding apparatus 100 is placed on the floor of the manufacturing plant. The longer the overall length of the injection blow molding apparatus 100, the greater the floor space it occupies. A larger floor space reduces the space around the injection blow molding apparatus 100, which is undesirable from the standpoint of a good working environment. To maintain a good working environment, it is desirable to shorten the overall length of the injection blow molding apparatus 100.

[0009] Furthermore, with the diversification of blow-molded products, there has been a shift in recent years from the conventional mass production of a few product types to small-batch production of many product types. Examples of multi-product production include the mixed production of large and small products of different sizes, and the mixed production of products of different colors. When such requests arise, the following measures can be considered, as shown in the diagram below.

[0010] As shown in Figure 11, a large product is manufactured in the first injection blow molding apparatus 100A, and a smaller product of a different color is manufactured in the second injection blow molding apparatus 100B. As a result, mixed production of different sizes and mixed production of different colors is possible. However, this layout doubles the floor space occupied, making it even less desirable from a work environment perspective. Based on the above, there is a need for injection blow molding technology that allows for a shorter clamping device 103, as shown in Figures 10(a) and (b), and enables high-mix, low-volume production. [Prior art documents] [Patent Documents]

[0011] [Patent Document 1] Patent No. 6765767 [Overview of the project] [Problems that the invention aims to solve]

[0012] The present invention aims to provide an injection blow molding technology that shortens the clamping device and enables high-mix, low-volume production. [Means for solving the problem]

[0013] The inventors investigated various structures to solve the problem. The process of this investigation is described below. Figure 1(a) is a comparative example, showing a conventional injection blow molding apparatus 100 again. The length L10 of the clamping device 103 is sufficiently large.

[0014] The inventors considered changing the orientation of the pivot circle 118 because the pivot circle 118 strongly influences the length L10. In the process, they modified the pivot circle 118 to pivot around the clamping axis 119. The result is shown in Figure 1(b). In other words, Figure 1(b) shows an example, in which the length L1 of the injection blow molding apparatus 10 is significantly smaller than the conventional L10.

[0015] Furthermore, the toggle link mechanism 18 shown in Figure 1(b) has a shorter link than the toggle link mechanism 108 shown in Figure 1(a), and therefore is shorter in length than the toggle link mechanism 108. Taking this into consideration, the length L1 can be shortened to about half of the conventional length L10.

[0016] As shown in FIG. 1(b), the injection blow molding apparatus 10 mainly includes a bed 11, an injection device 12 placed on the bed 11 for injecting molten resin, and a mold clamping device 13. The mold clamping device 13 includes a fixed platen 14 and a pressure receiving platen 15 fixed to the bed 11, tie bars 16 passed between them, a movable platen 17 disposed between the fixed platen 14 and the pressure receiving platen 15 and guided by the tie bars 16, a toggle link mechanism 18 for moving the movable platen 17 starting from the pressure receiving platen 15, a turntable 21 attached to the movable platen 17 and rotated around a mold clamping shaft 19, and a mold device 30 attached to the turntable 21 and the fixed platen 14.

[0017] [Mold Device] The mold device 30 includes a movable side support plate 22 attached to the turntable 21, a core 31 supported by the movable side support plate 22, a fixed side support plate 34 attached to the fixed platen 14, and an injection mold 37 and a blow mold 41 supported by the fixed side support plate 34.

[0018] [Movable Side Support Plate and Fixed Side Support Plate] The movable side support plate 22 is attached to the turntable 21 attached to the movable platen 17 and is a member for supporting the core 31. The fixed side support plate 34 is attached to the fixed platen 14 and is a member for supporting the injection mold 37 and the blow mold 41.

[0019] A[Core] The structure of the core 31 is determined by the shape of the blow molded product and can be arbitrarily determined. An example of the structure of the core 31 will be described based on FIGS. 2(a) and (b). As shown in FIG. 2(a), the core 31 includes a core base portion 31a inserted into the movable side support plate 22 and a core tip portion 31b protruding from the movable side support plate 22. Preferably, the core base portion 31a and the core tip portion 31b are integrally formed. The core 31 has an air passage 31c extending to the core tip portion 31b. High-pressure air is supplied from a compressed air source 45 to the air passage 31c.

[0020] Preferably, a slide type 31d is provided at the boundary between the core base 31a and the core tip 31b. When the blow molded product is a so-called under, the slide type 31d is opened to remove the blow molded product from the core 31.

[0021] Also, although not essential, a central hole 31e is formed in the core 31, and a tube 31f is inserted into this central hole 31e. That is, the tube 31f and the central hole 31e constitute a temperature control water channel (FIG. 2(b), reference numeral 31g). Water (temperature-controlled water) adjusted to a temperature suitable for the molten resin is supplied from the temperature control machine 46 to the temperature control water channel 31g and recovered.

[0022] FIG. 2(b) is an enlarged view of part b of FIG. 2(a). As shown in FIG. 2(b), the temperature-controlled water teeth, is discharged through the inside of the tube 31f to the central hole 31e, Inverted, and passes through the temperature control water channel 31g between the central hole 31e and the tube 31f. move on. As a result, the core tip 31b is kept at an appropriate temperature by the temperature-controlled water.

[0023] [Significance of temperature control] Keep the core tip 31b at a temperature suitable for the molten resin. Then, the temperature distribution of the parison (FIG. 4, reference numeral 54) can be made uniform. During blow molding, the parison can be inflated evenly. As a result, the thickness (wall thickness) of the blow molded product can be made constant or almost constant. If there is no temperature control, temperature unevenness will inevitably occur in the parison. Then, during blow molding, parts that are easy to stretch and parts that are difficult to stretch will be formed. As a result, unevenness occurs in the thickness (wall thickness) of the blow molded product, which is not preferable.

[0024] [Injection mold] As shown in FIG. 3, the injection mold 37 is fixed to the fixed-side support plate 34, for example, with bolts, and has a small recess 37a slightly larger than the core 31. The space between this small recess 37a and the core 31 becomes a cavity for the parison. The injection mold 37 has a gate 37b for injecting molten resin into the cavity for the parison.

[0025] [Sprue and runner] The fixed-side support plate 34 has a sprue 47 and a runner 51. A hot runner is preferred for the runner 51. The sprue 47 and runner 51 serve to supply molten resin to the gate 37b.

[0026] [Function of injection molds] Move the core 31 as indicated by arrow (1) to align it with the injection mold 37. This forms a parison cavity. By injecting molten resin into this parison cavity, a parison (Figure 4, reference numeral 54) is obtained. After this, move the core 31 in the opposite direction to arrow (1).

[0027] [Blow mold] As shown in Figure 4, the blow mold 41 is fixed to the fixed-side support plate 34 and has a large recess 41a that corresponds to the size of the blow-molded product. This large recess 41a is significantly larger than the small recess 37a shown in Figure 3.

[0028] [Function of blow molds] As shown in Figure 4, a parison 54 is attached to the core 31. The core 31 is moved as indicated by arrow (2) to fit into the blow mold 41. In this state, high-pressure air is blown out from the air passage 31c. The parison 54 then inflates. The core 31 is then moved in the opposite direction to arrow (2). After this, the blow-molded product is removed from the core 31.

[0029] [First and Second Cores] Figure 5(a) is a view from arrow 5a-5a in Figure 1(b), and Figure 5(b) is a view from arrow 5b-5b in Figure 1(b). As shown in Figure 5(a), a movable support plate 22 is attached to the turntable 21, and a first core 32 and a second core 33 are attached to this movable support plate 22 at arbitrary positions. The first core 32 and the second core 33 may be the same size, or they may be different sizes.

[0030] [Explanation of terms] When the structures are identical or similar but the mounting positions need to be distinguished, they are designated as "first" and "second," such as "first core 32" and "second core 33." When there is no need or little need to distinguish, it is simply called Core 31. The same applies to the other components.

[0031] The first core 32 and the second core 33 are rotated 180° around the clamping shaft 19, which also serves as the center of rotation, by the turntable 21. Due to the rotation (swivel), the first core 32 and the second core 33 move to positions that are point-symmetric with respect to the clamping shaft 19. The first core 32 and second core 33, after being moved, will be shown with dashed lines and designated with the symbol F (short for dashed), and will be called the first core 32F and the second core 33F.

[0032] [First and second injection molds and first and second blow molds] As shown in Figure 5(b), the fixed support plate 34 is fitted with a first injection mold 38, a first blow mold 42, a second injection mold 39, and a second blow mold 43. In addition, the fixed support plate 34 is provided with a first sprue 48 and a first runner 52 for supplying molten resin to the first injection mold 38, and a second sprue 49 and a second runner 53 for supplying molten resin to the second injection mold 39.

[0033] The first injection mold 38 and the second injection mold 39 may be the same size, or they may be different sizes. Similarly, the first blow mold 42 and the second blow mold 43 may be the same size, or they may be different sizes from each other.

[0034] Figures 5(a) and 5(b) correspond to the unfolded diagrams. A fold line 55 is hypothetically drawn between Figure 5(a) and Figure 5(b). In Figure 5(b), the first injection mold 38 is positioned symmetrically to the first core (Figure 5(a), reference numeral 32). The second blow mold 43 is positioned symmetrically to the second core (Figure 5(a), reference numeral 33). Furthermore, the second injection mold 39 is positioned symmetrically to the second core (Figure 5(a), reference numeral 33F). The first blow mold 42 is positioned symmetrically to the first core (Figure 5(a), reference numeral 32F).

[0035] [Operation of mold equipment] The operation of the mold apparatus 30 described above will be explained with reference to Figure 6. In Figure 6, at ST10 (ST indicates the step number, and the same applies hereafter), the first core is aligned with the first injection mold. Next, the first parison is molded (ST11), and the first core is removed from the first injection mold (ST12). The first core is rotated 180° (ST13), aligned with the first blow mold (ST14), and the first parison is inflated (ST15).

[0036] Remove the first core from the first blow mold (ST16), remove the first blow molded product from the first core (ST17), and rotate the first core 180° in the opposite direction (ST18). Then return to ST10 and repeat ST10 to ST18. Note that ST17 and ST18 can be reversed. Also, although not mentioned, clean the first core before or after ST18.

[0037] In parallel with ST10, ST20 involves fitting the second core to the second blow mold as a dummy. In parallel with ST12, the second core is removed from the second blow mold in ST21. In parallel with ST13, the second core is rotated 180° in ST22. In parallel with ST14, ST23 is used to align the second core with the second injection mold.

[0038] Next, the second parison is molded (ST24), and the second core is removed from the second injection mold (ST25). The second core is rotated 180° in the opposite direction (ST26), aligned with the second blow mold (ST27), and the second parison is inflated (ST28).

[0039] Remove the second core from the second blow mold (ST29), remove the second blow molded product from the second core (ST30), and rotate the second core 180° (ST31). Then return to ST23 and repeat ST23 to ST31. Note that ST30 and ST31 can be reversed. Also, although not mentioned, clean the second core either before or after ST31.

[0040] As is clear from the above, the injection molding and blow molding of the second core are performed with a so-called half-turn delay relative to the first core. Also, the injection molding and blow molding of the first core are completed half a turn earlier than that of the second core. In other words, in the manufacturing of blow-molded products, there are dummy processes (ST20~ST22) at the start of the manufacturing process and dummy processes at the end of the manufacturing process. However, in this process, which excludes the preceding and following dummy processes, the first blow-molded product and the second blow-molded product are manufactured. Based on the above description, the present invention can be summarized as follows.

[0041] The present invention is a mold apparatus that is clamped by a mold clamping device. The clamping device comprises a fixed platen and a movable platen, the movable platen includes a turntable that rotates around the clamping shaft, A mold apparatus comprising a movable support plate attached to the turntable, a rod-shaped core supported by the movable support plate, a fixed support plate attached to the fixed platen, and an injection mold and a blow mold supported by the fixed support plate, The aforementioned core 、 It consists of at least two components, including a first core and a second core. The injection mold is a first injection mold corresponding to the first core. type and type It consists of at least two parts, including a second injection mold corresponding to the second core after it has been rotated 180°, The blow mold consists of at least two molds, including a second blow mold corresponding to the second core and a first blow mold corresponding to the first core after it has been rotated 180°. The fixed support plate includes a first sprue and a first runner provided for supplying the first resin material to the first injection mold, and a second sprue and a second runner provided for supplying the second resin material to the second injection mold. A first parison is manufactured using the first core and the first injection mold, and a first blow molded product is manufactured by blow molding the first parison using the first core and the first blow mold. The present invention is characterized by manufacturing a second parison using the second core and the second injection mold, and then blow molding the second parison using the second core and the second blow mold to produce a second blow-molded product. [Effects of the Invention]

[0042] In this invention, the clamping device includes a turntable, which rotates around the clamping axis. As a result, the length of the clamping device along the clamping axis can be significantly reduced. In addition, by making the first blow mold larger and the second blow mold smaller, mixed production of different sizes becomes possible with a single injection blow molding machine. Furthermore, since the color and type of the first resin material and the second resin material can be changed, mixed production of different colors becomes possible with a single injection blow molding machine. As a result, the present invention provides an injection blow molding technology that shortens the clamping device and enables high-mix, low-volume production. [Brief explanation of the drawing]

[0043] [Figure 1] (a) and (b) are diagrams illustrating the process of establishing the present invention. [Figure 2] (a) and (b) are cross-sectional views of the core. [Figure 3] This is a cross-sectional view of an injection mold. [Figure 4] This is a cross-sectional view of a blow mold. [Figure 5] (a) is a view from the arrow 5a-5a in Figure 1(b), and (b) is a view from the arrow 5b-5b in Figure 1(b). [Figure 6] This is a flowchart illustrating the operation of the first and second cores. [Figure 7] This is a plan view of the injection blow molding apparatus according to the present invention. [Figure 8] This is a view from arrow 8-8 in Figure 7. [Figure 9] This is a view from arrow 9-9 in Figure 7. [Figure 10] (a) is a diagram illustrating the open state of a conventional injection blow molding apparatus, and (b) is a diagram illustrating the clamped state. [Figure 11] These are plan views of a conventional first injection blow molding apparatus and a second injection blow molding apparatus. [Modes for carrying out the invention]

[0044] Embodiments of the present invention will be described below with reference to the attached drawings. [Examples]

[0045] [Injection blow molding machine] As shown in Figure 7, the injection blow molding apparatus 10 consists of a two-color molding apparatus 60 and a mold apparatus 30.

[0046] [Two-color molding device] The two-color molding apparatus 60 is a general term for a horizontal injection molding apparatus that has a turntable and two injection devices that inject molten resins of different colors. In other words, the two-color molding apparatus 60 consists of a bed 11, a first injection device 12A and a second injection device 12B mounted on the bed 11 parallel to each other, a clamping device 13, and a two-color molding die 61. The clamping device 13 is equipped with a turntable 21 that rotates around a clamping shaft 19.

[0047] The first injection device 12A melts and injects the first resin material. The second injection device 12B melts and injects a second resin material that is different in color from the first resin material. Two-color molding apparatuses 60 with this structure are widely used in practice.

[0048] [Injection blow molding machine] The two-color molding die 61 is removed from the two-color molding apparatus 60. Then, the mold device 30 of the present invention is installed in place of the two-color molding die 61. As a result, an injection blow molding apparatus 10 consisting of the two-color molding apparatus 60 and the mold device 30 is obtained. It goes without saying that by returning the mold device 30 to the two-color molding mold 61, the device can be returned to its original two-color molding state 60.

[0049] Figure 8 shows the view from arrow 8-8 in Figure 7, and Figure 9 shows the view from arrow 9-9. As shown in Figure 8, a first movable support plate 23 and a second movable support plate 24 are attached to the turntable 21. Eight cores 31, including a first core 32 and a second core 33, are attached to the first movable support plate 23, and eight cores 31 are attached to the second movable support plate 24. In other words, the movable side support plate (Figure 5(a), reference numeral 22) is composed of two support plates: a first movable side support plate 23 and a second movable side support plate 24. Dividing it into two plates makes the support plate smaller and lighter, which has the advantage of making it easier to transport the support plate and attach and detach it from the turntable 21.

[0050] As shown in Figure 9, the fixed-side support plate 34 is composed of two support plates: a first fixed-side support plate 35 and a second fixed-side support plate 36. Dividing it into two plates makes it smaller and lighter, which has the advantage of making it easier to transport the support plates and attach and detach them from the fixed plate 14.

[0051] In this case, the first fixed support plate 35 is provided with a first sprue 48 and a first runner 52, and four injection molds 37 including a first injection mold 38 and four blow molds 41 including a second blow mold 43 are provided. Similarly, the second fixed support plate 36 is provided with a second sprue 49 and a second runner 53, and four injection molds 37 including a second injection mold 39 and four blow molds 41 including a first blow mold 42 are provided.

[0052] If the fixed support plate 34 is small, it is recommended to use a single piece, and if it is large, it is recommended to divide it into two pieces. Therefore, the configuration of the fixed support plate 34 can be changed as desired.

[0053] The present invention described above can be summarized as follows, with reference to the drawings. The mold apparatus 30 is clamped by a clamping device 13 as shown in Figure 1(b), The clamping device 13 comprises a fixed platen 14 and a movable platen 17, and the movable platen 17 is equipped with a turntable 21 that rotates around the clamping shaft 19. The mold apparatus 30 comprises a movable support plate 22 attached to the turntable 21, a rod-shaped core 31 supported by the movable support plate 22, a fixed support plate 34 attached to the fixed platen 14, and an injection mold 37 and a blow mold 41 supported by the fixed support plate 34, As shown in Figure 8, the core 31 consists of at least two cores, including a first core 32 and a second core 33. As shown in Figures 5(a) and (b), the injection mold 37 consists of at least two molds, including a first injection mold 38 corresponding to the first core 32 and a second injection mold 39 corresponding to the second core 33F after a 180° rotation. The blow mold 41 consists of at least two molds, including a second blow mold 43 corresponding to the second core 33 and a first blow mold 42 corresponding to the first core 32F after it has been rotated 180°. The fixed-side support plate 34 includes a first sprue 48 and a first runner 52 provided for supplying the first resin material to the first injection mold 38, and a second sprue 49 and a second runner 53 provided for supplying the second resin material to the second injection mold 39. As shown in ST10 to ST18 of Figure 6, the first parison is manufactured using the first core 32 and the first injection mold 38, and the first parison is blow-molded using the first core 32 and the first blow mold 42 to produce a first blow-molded product. As shown in ST23 to ST31 in Figure 6, a second parison is manufactured using the second core 33 and the second injection mold 39, and a second blow-molded product is manufactured by blow-molding the second parison using the second core 33 and the second blow mold 43.

[0054] The effects of the present invention are as shown in Table 1.

[0055] [Table 1]

[0056] In other words, in Figure 5(b), by making the first blow mold 42 and the second blow mold 43 the same size and supplying molten resin of the same color to the first sprue 48 and the second sprue 49, it becomes possible to "1. manufacture blow molded products of the same size and color." Furthermore, by making the first blow mold 42 and the second blow mold 43 the same size, and supplying molten resin of different colors to the first sprue 48 and the second sprue 49, "2. It becomes possible to manufacture blow molded products of the same size but different colors."

[0057] Furthermore, by making the first blow mold 42 and the second blow mold 43 different sizes and supplying molten resin of the same color to the first sprue 48 and the second sprue 49, "3. Blow molded products of the same color but different sizes can be manufactured." Furthermore, by making the first blow mold 42 and the second blow mold 43 different sizes from each other, and supplying molten resin of different colors to the first sprue 48 and the second sprue 49, "4. Blow molded products of different sizes and different colors can be manufactured."

[0058] As shown in Figures 2(a) and (b), preferably, the core 31 has a temperature-controlled water channel 31g through which temperature-controlled water flows.

[0059] If temperature control is not available, temperature variations will inevitably occur in the parison. This results in areas that are easily stretched and areas that are not during blow molding. Consequently, variations in the thickness (wall thickness) of the blow-molded product occur, which is undesirable. In contrast, according to the present invention, the core tip portion 31b is maintained at a temperature suitable for the molten resin. This makes it possible to equalize the temperature distribution of the parison (Figure 4, reference numeral 54). During blow molding, the parison can be expanded uniformly. As a result, the thickness (wall thickness) of the blow-molded product can be made constant or nearly constant.

[0060] Furthermore, as shown in Figure 7, preferably, the injection blow molding apparatus 10 consists of a mold device 30 and a two-color molding device 60, The two-color molding apparatus 60 comprises a first injection device 12A that makes nozzle contact with the first sprue (Figure 5(b), reference numeral 48), a second injection device 12B that makes nozzle contact with the second sprue (Figure 5(b), reference numeral 49), and a mold clamping device 13 including the turntable 21.

[0061] The present invention makes it possible to cleverly utilize existing two-color molding equipment 60. That is, by removing the two-color molding mold 61 from the existing two-color molding equipment 60 and installing a mold device 30 in its place, an injection blow molding equipment 10 can be obtained.

[0062] While it is possible to construct a completely new injection blow molding machine 10, utilizing the existing two-color molding machine 60 offers the advantage of making the injection blow molding machine 10 extremely easy and inexpensive to manufacture. In addition, the two-color molding apparatus 60 can be used not only for simple two-color molding but also for both two-color molding and blow molding, which has the advantage of increasing the usability of the two-color molding apparatus 60.

[0063] Furthermore, the toggle link mechanism 18 shown in Figure 1(b) can be replaced with a hydraulic cylinder. [Industrial applicability]

[0064] This invention is suitable for mold equipment used to manufacture blow-molded products. [Explanation of symbols]

[0065] 10...Injection blow molding machine, 12...Injection machine, 12A...First injection machine, 12B...Second injection machine, 13...Clamping machine, 14...Fixed platen, 17...Movable platen, 19...Clamping shaft, 21...Turntable, 22...Movable side support plate, 30...Mold device, 31...Core, 31g...Temperature control water channel, 32...First core, 33...Second core, 34...Fixed side support plate, 37...Injection mold, 38...First injection mold, 39...Second injection mold, 41...Blow mold, 42...First blow mold, 43...Second blow mold, 48...First sprue, 49...Second sprue, 52...First runner, 53...Second runner, 54...Parison, 60 … Two-color molding equipment.

Claims

1. It is a mold device that is clamped by a mold clamping device, The clamping device comprises a fixed platen and a movable platen, the movable platen includes a turntable that rotates around the clamping shaft, A mold apparatus comprising a movable support plate attached to the turntable, a rod-shaped core supported by the movable support plate, a fixed support plate attached to the fixed platen, and an injection mold and a blow mold supported by the fixed support plate, The aforementioned core consists of at least two cores, including a first core and a second core. The injection mold comprises at least two molds, including a first injection mold corresponding to the first core and a second injection mold corresponding to the second core after being rotated 180°. The blow mold consists of at least two molds, including a second blow mold corresponding to the second core and a first blow mold corresponding to the first core after it has been rotated 180°. The fixed support plate includes a first sprue and a first runner provided for supplying the first resin material to the first injection mold, and a second sprue and a second runner provided for supplying the second resin material to the second injection mold. A first parison is manufactured using the first core and the first injection mold, and a first blow molded product is manufactured by blow molding the first parison using the first core and the first blow mold. A mold apparatus characterized by manufacturing a second parison using the second core and the second injection mold, and manufacturing a second blow-molded product by blow-molding the second parison using the second core and the second blow mold.

2. A mold apparatus according to claim 1, The mold apparatus is characterized in that the core has a temperature-controlled water channel through which temperature-controlled water flows.

3. An injection blow molding apparatus comprising a mold apparatus according to claim 1 or claim 2 and a two-color molding apparatus, The injection blow molding apparatus is characterized by comprising a two-color molding apparatus, a first injection device that makes nozzle contact with the first sprue, a second injection device that makes nozzle contact with the second sprue, and a mold clamping device including the turntable.

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