Injection blow molding device

Abstract

The utility model discloses an injection-blow molding device which comprises a deck plate and a supporting plate located above the deck plate, an injection-blow rotating shaft is arranged in the supporting plate, an injection-blow rotating disc is arranged on the injection-blow rotating shaft, and two injection-blow core mold sets are symmetrically arranged on the injection-blow rotating disc and located on the two sides of the injection-blow rotating shaft. Each injection-blowing mold core group comprises injection-blowing mold cores with the same number; an injection mold is arranged on one side of the deck plate, a blow-molding rotating shaft is upwards arranged on the other side of the deck plate, a blow-molding rotating disc is arranged on the blow-molding rotating shaft, two blow-molding forming molds are symmetrically arranged on the blow-molding rotating disc and located on the two sides of the blow-molding rotating shaft, and the blow-molding forming molds correspond to the corresponding injection-blow mold core sets; and a blow molding blank taking device matched with the blow molding mold far away from the injection mold is also arranged on the supporting plate. According to the injection blow molding device disclosed by the utility model, the production efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to a plastic injection - blow molding machine, and particularly to an injection - blow molding device in a plastic injection - blow molding machine. Background Art

[0002] As is known to those skilled in the art, in a plastic injection - blow molding machine, the injection time is shorter than the blow - molding time. Before the blow - molding ends, the injection station can only be in an idle state. For this reason, the patent No. 201020641441.7 discloses a translational injection - blow molding machine, which solves the above - mentioned problem by arranging a blow - molding station on each side of the injection station. Since the injection station is in the middle, the blow - molding stations are arranged on both sides, and the demolding cores are arranged outside the blow - molding stations, resulting in a large horizontal dimension. When adding one more cavity, the horizontal dimension of the table needs to increase by 5 times the cavity pitch. Therefore, increasing the width of the mold to arrange more cavities to improve the production capacity of the plastic injection - blow molding machine will make the machine very wide. In addition, since the two blow - molding stations and the demolding stations are arranged on both sides, a conveyor belt needs to be set on each side, which not only occupies a larger area but also greatly increases the cost. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide an injection - blow molding device with a more compact and reasonable structure and capable of blow - molding in two stages.

[0004] To solve the above - mentioned technical problem, the technical solution adopted by the utility model is: an injection - blow molding device, comprising: a frame and a table board arranged on the frame. The frame is provided with a support board above the table board. A blow - injection rotary shaft is movably arranged downward in the support board. A blow - injection rotary disk is arranged on the blow - injection rotary shaft. Two blow - injection core - type groups are symmetrically arranged on both sides of the blow - injection rotary shaft on the blow - injection rotary disk, that is, the two blow - injection core - type groups are symmetrically arranged on both sides of the blow - injection rotary shaft. Each blow - injection core - type group includes the same number of blow - injection cores. The table board is provided with an injection mold corresponding to the corresponding blow - injection core - type group on one side. An injection cavity corresponding to the blow - injection cores in the blow - injection core - type group is opened in the injection mold. A blow - molding rotary shaft is movably arranged upward on the other side of the table board. A blow - molding rotary disk is arranged on the blow - molding rotary shaft. Two blow - molding molds are symmetrically arranged on both sides of the blow - molding rotary shaft on the blow - molding rotary disk. Among them, the blow - molding mold close to the injection mold side corresponds to the corresponding blow - injection core - type group. The blow - molding mold includes: a pair of oppositely arranged blow - molding half - molds. A blow - molding half - cavity corresponding to the blow - injection cores in the blow - injection core - type group is opened on the blow - molding half - molds. The blow - molding half - cavities on the corresponding pair of blow - molding half - molds form a blow - molding cavity when the pair of blow - molding half - molds are closed. The support board is further provided with a blow - molding blank - taking device cooperating with the blow - molding mold far from the injection mold.

[0005] As a preferred solution, in the injection blow molding device described above, the blow molding blank taking device includes: a blank taking transfer slideway arranged on the support plate, a blow molding blank taking seat is slidably arranged in the blank taking transfer slideway, and a blow molding blank taking core corresponding to the blow molding cavity in the blow molding die is arranged on the blow molding blank taking seat.

[0006] As a preferred solution, in the injection blow molding device described above, the blow molding blank taking device includes: a blank taking return rotating shaft movably penetrating downward through the support plate, a blank taking rotating disc is arranged on the blank taking return rotating shaft, and two blow molding blank taking core groups corresponding to the blow molding die far from the injection mold are symmetrically arranged on both sides of the blank taking return rotating shaft on the blank taking rotating disc. Each blow molding blank taking core group includes a blow molding blank taking core corresponding to the blow molding cavity in the blow molding die.

[0007] As a preferred solution, in the injection blow molding device described above, a stripping plate is sleeved on the blow molding blank taking core, and two stripping driving mechanisms respectively connected to the stripping plates on the blow molding blank taking cores in the corresponding blow molding blank taking core groups are arranged on the blank taking rotating disc.

[0008] As a preferred solution, in the injection blow molding device described above, the blow molding die further includes: a bottom surface forming die centrally arranged between a pair of blow molding half dies, and a bottom forming surface matching the blow molding half cavities on the pair of blow molding half dies is arranged on the bottom surface forming die.

[0009] As a preferred solution, in the injection blow molding device described above, a conveyor belt is arranged outside the blow molding rotating disc and below the blow molding blank taking core of the blow molding blank taking device.

[0010] As a preferred solution, in the injection blow molding device described above, a pair of openable and closable bottle mouth half parts are arranged above the injection mold, and bottle mouth forming half cavities corresponding to the injection cavity are respectively arranged on the pair of openable and closable bottle mouth half parts.

[0011] The beneficial effects of the present utility model are:

[0012] 1. By arranging two blow molding dies on the blow molding rotating disc on the same side, only a demolding station needs to be arranged on the corresponding side. Correspondingly, only a conveyor belt needs to be arranged below the demolding station on this side. In this way, it is very convenient to increase the production capacity of the plastic injection blow molding machine by arranging more cavities by increasing the width of the mold, while also reducing the occupation of the site and saving costs.

[0013] 2. The utility model enables the injection-blowing core to switch back and forth between the injection mold and the adjacent blow molding mold by arranging an injection-blowing rotary shaft on the support plate, and enables the two blow molding molds to rotate by arranging a blow molding rotary shaft on the table board, so that the blow molding mold with the preform can continue to blow the preform again by the blow molding preform core, and the blow molding preform device can take away the blow molded finished product. The formed bottle or the empty blow molding mold in the starting state taken away can be used to place the injection-blowing core and the preform it carries again to blow the preform, so that the injection time is equivalent to the single blow molding time, greatly shortening the idle time of the injection mold and significantly improving the production efficiency.

[0014] 3. The utility model removes the blow molded finished product in a sliding manner, with a simple and reliable structure, and is more suitable for the occasion of blowing larger plastic products.

[0015] 4. The utility model removes the blow molded finished product in a rotating manner, so that the time for removing the blow molded finished product is shorter, and it is especially suitable for the occasion of blowing smaller plastic products.

[0016] 5. The utility model realizes the automatic demolding of plastic products by arranging a demolding plate and a demolding driving mechanism, greatly reducing the labor intensity.

[0017] 6. The utility model simplifies the structure of the blow molding half cavity on the blow molding half mold and greatly reduces the production cost by arranging a bottom surface molding mold in the middle between a pair of blow molding half molds, and arranging a bottom molding surface on the bottom surface molding mold that cooperates with the blow molding half cavities on the pair of blow molding half molds.

[0018] 7. The utility model can inject screw-threaded preforms by arranging a pair of openable and closable bottle mouth half parts above the injection mold, greatly expanding the application range of the injection mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram when the injection-blow molding device of the first embodiment of the utility model is closed.

[0020] Figure 2 is a schematic structural diagram when the injection-blow molding device of the first embodiment of the utility model is opened.

[0021] Figure 3 is a schematic structural diagram when the injection-blow molding device of the second embodiment of the utility model is closed.

[0022] Figure 4 is a schematic structural diagram when the injection-blow molding device of the second embodiment of the utility model is opened.

[0023] Figure 5It is the layout diagram of the mold core taking and injection-blowing core in the injection-blowing molding device described in the present utility model.

[0024] Figure 6 It is the layout diagram of the injection mold and blow molding mold in the injection-blowing molding device described in the present utility model.

[0025] Figures 1 to 6 The reference numerals in the figure are respectively: 2, table board; 20, blow molding turntable; 21, blow molding rotating shaft; 210, blow molding rotation driving mechanism; 3, injection mold; 301, injection cavity; 31, bottle mouth half-piece; 33, hot runner; 35, barrel; 351, nozzle; 4, blow molding mold; 41, blow molding half mold; 42, blow molding half mold; 43, bottom surface molding mold; 61, injection-blowing core; 62, blow molding blank taking core; 621, stripping plate; 7, support plate; 70, injection-blowing turntable; 700, guide pillar; 71, injection-blowing rotating shaft; 710, injection-blowing rotation driving mechanism; 75, blank taking transfer slideway; 750, blow molding blank taking seat; 77, blank taking rotating shaft; 770, blank taking rotation driving mechanism; 78, blank taking turntable; 8, conveyor belt; 91, preform; 92, semi-finished plastic bottle; 93, finished plastic bottle. Detailed implementation manners

[0026] Next, in conjunction with the attached Figures 1 to 6 , the specific implementation scheme of an injection-blowing molding device described in the present utility model will be described in detail.

[0027] Embodiment 1:

[0028] As Figure 1 and Figure 2 shown, an injection-blowing molding device described in the present utility model includes: a frame (which belongs to the conventional technology in the art and will not be described in detail here), and a table board 2 provided on the frame. The frame is provided with a support plate 7 above the table board 2. An injection-blowing rotating shaft 71 is movably arranged downward in the support plate 7 (which belongs to the conventional technology in the art and will not be described in detail here). The support plate 7 is also provided with an injection-blowing rotation driving mechanism 710 for driving the injection-blowing rotating shaft 71 to rotate (which belongs to the conventional technology in the art and will not be described in detail here). The injection-blowing rotating shaft 71 is provided with an injection-blowing turntable 70. Two injection-blowing core groups are symmetrically arranged on both sides of the injection-blowing rotating shaft 71 on the injection-blowing turntable 70, that is: the two injection-blowing core groups are symmetrically arranged on both sides of the injection-blowing rotating shaft 71. Each injection-blowing core group includes 5 injection-blowing cores 61 (see Figure 5 shown, the specific quantity can be determined according to the actual situation); on one side of the table board 2 ( Figure 1 and Figure 2On the right side (in the right side of the figure) is provided an injection mold 3 corresponding to the injection-blowing core group on the right side. An injection cavity 301 corresponding one by one to the injection-blowing cores 61 in the five injection-blowing core groups is formed in the injection mold 3 (see Figure 6 as shown). Above the injection mold 3 is provided a pair of openable and closable bottle mouth half molds 31 (the specific setting method belongs to the conventional technology in the field and will not be described in detail here). Bottle mouth forming half cavities corresponding to the injection cavity 301 are respectively formed on the pair of bottle mouth half molds 31; on the other side of the table board 2 ( Figure 1 and Figure 2 on the left side in the figure), a blow molding rotary shaft 21 is movably arranged upward. A blow molding rotary driving mechanism 210 for driving the rotation of the blow molding rotary shaft 21 is also provided on the table board 2 (belonging to the conventional technology in the field and will not be described in detail here). A blow molding rotary disc 20 is arranged on the blow molding rotary shaft 21. Two blow molding molds 4 are symmetrically arranged on both sides of the blow molding rotary shaft 21 on the blow molding rotary disc 20. Among them, the blow molding mold 4 on the side close to the injection mold 3 ( Figure 1 and Figure 2 on the right side in the figure) corresponds to the injection-blowing core group on the corresponding side ( Figure 1 Figure 2 on the left side in the figure). The blow molding mold 4 includes: a pair of relatively arranged blow molding half molds 41 and 42, and a bottom surface forming mold 43 arranged in the middle between the corresponding pair of blow molding half molds 41 and 42. Blow molding half cavities corresponding to the five injection-blowing cores 61 in the injection-blowing core group are respectively formed on the blow molding half molds 41 and 42 (see Figure 6 as shown). A bottom surface forming surface matching the blow molding half cavities on the pair of blow molding half molds 41 and 42 is arranged on the bottom surface forming mold 43; the blow molding half cavities on the corresponding pair of blow molding half molds 41 and 42 and the bottom surface forming surface on the corresponding bottom surface forming mold 43 form a blow molding cavity when the pair of blow molding half molds 41 and 42 are closed; a blow molding blank taking device matching the blow molding mold 4 far from the injection mold 3 ( Figure 1 and Figure 2 on the left side in the figure) is also provided on the support plate 7. The blow molding blank taking device includes: a blank taking transfer slideway 75 arranged on the support plate 7, and a blow molding blank taking seat 750 slidably arranged on the blank taking transfer slideway 75 (belonging to the conventional technology in the field and will not be described in detail here). Five blow molding blank taking cores 62 corresponding to the blow molding cavities in the blow molding mold 4 are arranged on the blow molding blank taking seat 750. A stripping plate 621 is sleeved on the blow molding blank taking core 62. A stripping driving mechanism connected to the stripping plate 621 is arranged on the blow molding blank taking seat 750 (belonging to the conventional technology in the field and will not be described in detail here). In this embodiment, a conveyor belt 8 is arranged outside the blow molding rotary disc 20 and below the blow molding blank taking core 62 of the blow molding blank taking device.

[0029] Example 2:

[0030] As Figure 3 and Figure 4 shown, for another injection-blow molding device of the present utility model, except that the blow molding and parison taking device is different from that of Example 1, the rest of the structures are the same; the blow molding and parison taking device in this injection-blow molding device includes: a parison taking rotary shaft 77 movably penetrating downward through a support plate 7, and a parison taking rotary driving mechanism 770 (which belongs to the conventional technology in the art and will not be described in detail here) for driving the parison taking rotary shaft 77 to rotate is further arranged on the support plate 7. A parison taking rotary disk 78 is arranged on the parison taking rotary shaft 77. Two blow molding and parison taking core groups corresponding to the blow molding die 4 far from the injection mold 3 are symmetrically arranged on both sides of the parison taking rotary shaft 77 on the parison taking rotary disk 78. Each blow molding and parison taking core group includes five blow molding and parison taking cores 62 corresponding to the blow molding cavities in the blow molding die 4; two demolding driving mechanisms respectively connected to the demolding plates 621 on the blow molding and parison taking cores 62 in the corresponding blow molding and parison taking core groups are arranged on the parison taking rotary disk 78.

[0031] During actual application, the support plate 7 is arranged on the table top plate 2 through four parallel guide posts 700.

[0032] The working process of the present utility model is as follows: In the mold opening state, among the two injection-blowing core groups, one group corresponds to the injection mold 3, and the other group corresponds to the blow molding mold 4 opened on the right side, while the blow molding blank-taking core group corresponds to another (left-side) blow molding mold 4. The support plate 7 descends, and the mold closes. At this time, the molten plastic enters the injection cavity 301 through the barrel 35, the nozzle 351 on the barrel 35, and the hot runner 33, and is heat-insulated and shaped. The blow molding mold 4 corresponding to the injection-blowing core 61, i.e., the one close to the injection mold 3, closes. After the required time, the mold opens, and the support plate 7 ascends. The injection-blowing core 61 drives the preform 91 to ascend to the proper position. Then, by rotating the injection-blowing return shaft 71, the injection-blowing turntable 70 rotates 180°. At the same time, by rotating the blow molding return shaft 21, the blow molding turntable 20 rotates 180°. The injection-blowing core 61 with the preform 91 corresponds to the blow molding mold 4 opened on the right side, the blow molding blank-taking core 62 corresponds to the blow molding mold 4 closed on the left side, and the injection-blowing core 61 without the preform 91 corresponds to the injection mold 3. The support plate 7 descends, and the molten plastic enters the injection cavity 301 through the barrel 35, the nozzle 351 on the barrel 35, and the hot runner 33, and is heat-insulated and shaped. The blow molding mold 4 corresponding to the injection-blowing core 61, i.e., the one close to the injection mold 3, closes. Compressed air is blown into the injection-blowing core 61 through the air inlet hole and enters the preform 91 through the air passage, blowing the preform 91 into the required bottle shape to form the semi-finished plastic bottle 92. The air blowing is maintained for a certain time. When the preform 91 is formed and blow molded to the required time, the support plate 7 ascends to open the mold. The blow molding mold 4 corresponding to the injection-blowing core 61 remains closed. The injection-blowing core 61 is withdrawn from the blow molding mold 4, and the semi-finished plastic bottle 92 remains in the blow molding mold 4. Then, by rotating the injection-blowing return shaft 71, the injection-blowing turntable 70 rotates 180°. By rotating the blow molding return shaft 21, the blow molding turntable 20 rotates 180°. The closed blow molding mold 4 with the semi-finished plastic bottle 92 corresponds to the blow molding blank-taking core 62. The injection-blowing core 61 with the preform 91 corresponds to the empty blow molding mold 4, and the injection-blowing core 61 without the preform 91 corresponds to the injection mold 3. The support plate 7 descends to the proper position to close the mold. The molten plastic enters the injection cavity 301 through the barrel 35, the nozzle 351 on the barrel 35, and the hot runner 33, and is heat-insulated and shaped. The blow molding mold 4 corresponding to the injection-blowing core 61, i.e., the one close to the injection mold 3, closes. Compressed air is blown into the injection-blowing core 61 through the air inlet hole and enters the preform 91 through the air passage, blowing the preform 91 into the required bottle shape to form the semi-finished plastic bottle 92. The air blowing is maintained for a certain time;Meanwhile, compressed air at a certain pressure is blown into the blow molding preform core 62 to continue cooling and shaping the semi-finished plastic bottle 92 that has not been cooled sufficiently for a certain period of time. After the set time, the blow molding die 4 on the left is opened. After the injection molding die 3 and the two blow molding dies 4 have completed their respective operations, the support plate 7 rises to the fully open die position. The blow molding preform core 62 moves the finished plastic bottle 93 above the conveyor belt 8, demolds it through the demolding plate 621, and then returns to the position above the blow molding die 4 on the left. By rotating the injection blow return shaft 71, the injection blow turntable 70 is rotated 180°, turning the injection blow core 61 with the bottle preform 91 above the blow molding die 4 on the right, while the injection blow core 61 without the bottle preform 91 is transferred above the injection molding die 3. At the same time, by rotating the blow molding return shaft 21, the blow molding turntable 20 is rotated 180°, turning the closed blow molding die 4 with the semi-finished plastic bottle 92 below the blow molding preform core 62. The blow molding die 4 on the right is opened, and the support plate 7 descends to the fully closed die position to repeat the previous cycle.;

[0033] In summary, the above are only the preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. All equivalent changes and modifications made to the shape, structure, features, and spirit described in the claims of the present invention shall be included within the scope of the claims of the present invention.

Claims

1. An injection blow molding device, comprising: A frame and a table panel arranged on the frame, characterized in that the frame is provided with a supporting plate above the table panel, an injection-blowing rotary shaft is movably arranged downward in the supporting plate, an injection-blowing rotary disk is arranged on the injection-blowing rotary shaft, and two injection-blowing core mold groups are symmetrically arranged on the injection-blowing rotary disk on both sides of the injection-blowing rotary shaft, that is: the two injection-blowing core mold groups are symmetrically arranged on both sides of the injection-blowing rotary shaft, and each injection-blowing core mold group includes the same number of injection-blowing cores; an injection mold corresponding to the corresponding injection-blowing core group is arranged on one side of the table panel, and an injection mold cavity corresponding to the injection-blowing core in the injection-blowing core mold group is opened in the injection mold; the table panel is upwardly moved on the other side A blow molding rotary shaft is movably provided, a blow molding rotary disk is provided on the blow molding rotary shaft, and two blow molding molds are symmetrically provided on the blow molding rotary disk on both sides of the blow molding rotary shaft, wherein the blow molding mold close to the injection mold side corresponds to the corresponding injection and blowing core group, and the blow molding mold comprises: a pair of relatively arranged blow molding half molds, the blow molding half molds are provided with blow molding half cavities corresponding to the injection and blowing cores in the injection and blowing core group, and the blow molding half cavities on the corresponding pair of blow molding half molds form a blow molding cavity when the pair of blow molding half molds are closed; the support plate is also provided with a blow molding blank taking device that cooperates with the blow molding mold far away from the injection mold.

2. An injection blow molding device according to claim 1, characterized in that: The blow molding blank removal device comprises: a blank removal transfer slide arranged on a support plate, a blow molding blank removal seat slidably arranged in the blank removal transfer slide, and a blow molding blank removal core corresponding to the blow molding cavity in the blow molding mold is arranged on the blow molding blank removal seat.

3. An injection blow molding device according to claim 1, characterized in that: The blow molding blank removal device includes: a blank removal rotating shaft which is movably arranged downward in the support plate, a blank removal rotating disk is arranged on the blank removal rotating shaft, and two blow molding blank removal core groups corresponding to the blow molding mold away from the injection mold are symmetrically arranged on the blank removal rotating disk on both sides of the blank removal rotating shaft, and the blow molding blank removal core group includes a blow molding blank removal core corresponding to the blow molding cavity in the blow molding mold.

4. An injection blow molding device according to claim 3, characterized in that: The blow molding blank taking core is sleeved with a stripper plate, and the blank taking rotary disc is provided with two stripper drive mechanisms respectively connected with the stripper plates on the blow molding blank taking cores in the corresponding blow molding blank taking core group.

5. An injection blow molding device according to claim 1, characterized in that: The blow molding mold further comprises: a bottom molding mold centrally arranged between a pair of blow molding half-molds, and the bottom molding mold is provided with a bottom molding surface matching with the blow molding half-cavities on the pair of blow molding half-molds.

6. An injection blow molding device according to claim 1, characterized in that: The blow molding blank taking device is provided with a conveyor belt on the outer side of the blow molding rotary disk and below the blow molding blank taking core.

7. An injection blow molding device according to any one of claims 1 to 6, characterized in that: A pair of openable and closable bottle mouth half pieces are arranged above the injection mold, and the pair of openable and closable bottle mouth half pieces are respectively provided with bottle mouth molding half cavities corresponding to the injection molding cavities.

Images