Core translation compact type injection blow molding device
By optimizing the movement of the bottle neck half-parts through a split structure design and guide reset slide, the problems of non-compact structure and low production capacity of the core translation injection blow molding device are solved, achieving more efficient production and cost reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHANGJIAGANG JOWAY MACHINERY
- Filing Date
- 2025-05-16
- Publication Date
- 2026-04-17
AI Technical Summary
The existing core-shifting injection blow molding equipment has a non-compact structure and a long stroke of the bottle neck half-part, which affects production capacity.
The design adopts a split structure. The bottle body injection mold and the bottle body blow mold are respectively composed of the bottle body injection mold and the bottle body blow mold and a pair of bottle mouth injection blow half molds with the same structure. The bottle mouth injection blow half mold moves synchronously when the injection blow core is translated. The opening and closing process of the bottle mouth half mold is optimized by the guide reset slide and the elastic connection structure.
It shortens the mold opening time of the bottle neck injection blow molding half mold, increases production capacity, reduces the height of the moving mold side and material costs, and has a more compact structure, thus reducing manufacturing costs.
Smart Images
Figure CN224130434U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an injection blow molding device, specifically a core translation injection blow molding device. Background Technology
[0002] Currently, core-translation injection blow molding devices used for injection blow molding of plastic bottles typically include a fixed mold base and a moving mold base that translates relative to the fixed mold base. The fixed mold base has N bottle injection molds and N+1 bottle blow molds arranged at intervals. The bottle injection molds have multiple injection cavities. The moving mold base has 2N+1 pairs of bottle neck connectors corresponding to the N bottle injection molds and N+1 bottle blow molds, as well as 2N sets of injection blow cores. In actual operation, the injection blow cores continuously move back and forth between the injection and blow molding stations, while the bottle neck connectors do not. Therefore, the bottle neck connectors must be removed from the injection blow cores before the cores can be moved. To ensure that the bottle neck connectors can be completely removed from the injection blow cores, the moving mold side needs sufficient height, resulting in a larger space occupied by the moving mold side and a less compact structure. Moreover, the long travel distance of the bottle neck spout component takes a considerable amount of time, which affects production capacity. Utility Model Content
[0003] The technical problem to be solved by the present invention is to provide a compact injection blow molding device with a core translation mechanism that features a compact structure and synchronous movement of the bottle neck splitter and the core.
[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a core-translating compact injection blow molding device, comprising: a fixed mold base, a movable mold base that translates relative to the fixed mold base, a demolding frame slidably disposed on a demolding base via at least a pair of guide pillars, and a demolding advance / retreat driving device for driving the demolding frame to advance and retreat. The fixed mold base is provided with N bottle injection molds and N+1 bottle blow molds spaced apart, i.e., the bottle injection molds are arranged between two adjacent bottle blow molds. The bottle injection molds have several bottle injection cavities. The bottle blow molds include a pair of openable bottle blow mold halves and a [missing information - likely a component or part] disposed within the bottle blow mold halves. The bottom of the blow molding cavity between the bottles is provided with corresponding bottle cavity opening and closing drive devices on the fixed mold base, which cooperate with each pair of bottle blow molding half molds. Each bottle blow molding half mold has a corresponding bottle blow molding half cavity. When the bottle blow molding half molds are closed, the corresponding bottle blow molding half cavity on each pair of bottle blow molding half molds and the bottom of the bottle blow molding cavity form the bottle blow molding cavity. Above the moving mold base, a demolding top plate, a sliding support seat, and a sliding core seat are arranged in sequence. The sliding support seat is fixed on the moving mold base, and the sliding core seat is slidably mounted on the sliding support seat. The sliding support seat is equipped with a mold moving drive device for driving the sliding core seat to move. The mold base is equipped with 2N injection blow molding core assemblies via core plates. Each injection blow molding core assembly includes an injection blow molding core corresponding to the injection cavity of the bottle body in the injection mold. Each injection blow molding core assembly has a pair of openable bottle neck injection blow molding halves on both sides. The bottle neck injection blow molding halves include: a bottle neck half-seat, on which bottle neck half-parts corresponding to the injection cavities of the bottle body are provided. The bottle neck half-seats in each pair of bottle neck injection blow molding halves are elastically connected together, and each end face has a demolding guide slope arranged from bottom to top and outwards. The core plate is equipped with wedge blocks, and each wedge block has a demolding guide slope on its corresponding side bottle neck half-seat. The mold guide slope corresponds to the demolding guide slope; the demolding frame includes: a pair of demolding templates that span the corresponding ends of all the bottle neck injection blow molds, that is: one demolding template spans one end of all the bottle neck injection blow molds, and the other demolding template spans the other end of all the bottle neck injection blow molds. The pair of demolding templates are respectively provided with downward through guide reset notches on their inner lower parts, and the guide reset notches are provided with demolding support platforms and guide reset grooves at the lower edge of the injection mold facing the injection mold, so that the pair of bottle neck injection blow molds facing the injection mold are slidably placed in the corresponding guide reset grooves; the fixed mold base is provided with guide positioning holes that correspond one-to-one with the guide pillars.
[0005] As a preferred embodiment, in the aforementioned core-translation compact injection blow molding apparatus, the specific arrangement of the pair of openable and closable bottle blow molding half-molds is as follows: Blow molding locking templates are respectively provided on both sides of the pair of bottle blow molding half-molds on the fixed mold base; a blow molding guide slope is provided on the mounting surface of the blow molding locking template, i.e., its inner side, from the end closest to the moving mold base; the bottle blow molding half-mold is provided with a blow molding guide slope corresponding to the blow molding guide slope on the corresponding blow molding locking template; the bottle cavity opening and closing drive device includes: a blow molding ejection cylinder provided on the fixed mold base; a blow molding sliding seat is provided on the piston rod of the blow molding ejection cylinder; the cavity bottom is provided on the blow molding sliding seat; and the pair of bottle blow molding half-molds are slidably disposed on the blow molding sliding seat.
[0006] As a preferred embodiment, in the aforementioned core translation compact injection blow molding device, the specific connection structure between the bottle neck half seats in each pair of bottle neck injection blow molds includes: two compression springs, wherein the bottle neck half seats are provided with mold closing through holes along the opening and closing direction, and a bolt is selected to fit one of the compression springs through the mold closing through holes on both sides of the bottle neck half seats, and then the other compression spring is fitted on and a nut is tightened.
[0007] As a preferred embodiment, in the aforementioned core translation compact injection blow molding device, the bottle neck half seat has a spring mounting hole on its outer side facing the mold closing through hole, which cooperates with the compression spring, forming a stepped hole that is larger on the outside and smaller on the inside. The compression spring is set in the spring mounting hole of the corresponding bottle neck half seat.
[0008] As a preferred embodiment, in the aforementioned core translation compact injection blow molding device, the demolding advance and retreat drive device includes: an ejector rod arranged directly opposite the demolding top plate; reset pull rods are respectively provided on both sides of the demolding frame and between the demolding top plate; reset springs are sleeved on the reset pull rods; and the reset springs are disposed between the demolding top plate and the sliding support seat.
[0009] As a preferred embodiment, in the aforementioned core translational compact injection blow molding device, the moving mold base is provided with ejector pin through holes corresponding to the ejector pins.
[0010] As a preferred embodiment, in the aforementioned core translation compact injection blow molding device, a spring limiting seat is provided on the sliding support seat. The spring limiting seat has a pull rod through hole that cooperates with the reset pull rod. The reset pull rod is movably inserted into the pull rod through hole on the spring limiting seat, and the upper end of the reset spring presses against the spring limiting seat.
[0011] As a preferred embodiment, in the aforementioned core translation compact injection blow molding device, a spring mounting hole for cooperating with a return spring is provided on the bottom surface of the spring limiting seat, and the return spring is disposed in the spring mounting hole on the spring limiting seat.
[0012] As a preferred embodiment, in the aforementioned core translation compact injection blow molding apparatus, the mold moving drive device is a cylinder.
[0013] As a preferred embodiment, in the aforementioned core translation compact injection blow molding device, the demolding frame is provided with guide post mounting holes corresponding to the guide posts, and guide sleeves are provided in the guide post mounting holes, with the guide posts movably disposed in the corresponding guide sleeves.
[0014] The beneficial effects of this utility model are:
[0015] 1. This utility model unifies the design of injection molds and blow molds into a split structure, namely: the injection mold and the blow mold are respectively composed of a bottle body injection mold and a bottle body blow mold, and a pair of bottle neck injection blow molds with the same structure. This allows each pair of bottle neck injection blow molds to move together when the injection blow core is translated, thus eliminating the need to spend time removing them from the injection blow core, shortening the mold opening stroke of the bottle neck injection blow molds, thereby shortening the mold opening time of the bottle neck injection blow molds and improving production capacity; moreover, it also reduces the height of the moving mold side, making the structure of the moving mold side more compact and reducing material costs.
[0016] 2. The guide reset notch of this utility model is provided with a demolding support platform at the lower edge of the injection mold, forming a guide reset groove. This allows a pair of bottle neck injection blow mold halves facing the injection mold to be bound in the corresponding guide reset groove. Thus, the bottle neck injection blow mold halves can be pushed and opened at the injection station by the demolding support platform, and the molded plastic bottle can be demolded from the injection blow core. This allows the time for switching the injection blow core station to overlap with the cooling time of the plastic bottle, thereby further improving production capacity and reducing production costs.
[0017] 3. This utility model has a through hole for mold closing on the bottle mouth half seat along the opening and closing direction, and then uses two bolts, nuts and two compression springs to elastically connect a pair of bottle mouth injection mold half-die. Its structure is very simple and practical, which greatly reduces the manufacturing cost.
[0018] 4. This utility model has a spring mounting hole that matches the compression spring by opening a through hole on the outside of the bottle mouth half seat directly opposite the mold closing hole. On the one hand, the extension and contraction of the compression spring is more stable. On the other hand, since the compression spring does not occupy external space, the structure is more compact and can further reduce manufacturing costs.
[0019] 5. This utility model provides a spring mounting hole on the bottom surface of the spring limiting seat to cooperate with the return spring. On the one hand, this makes the extension and retraction of the return spring more stable. On the other hand, since the return spring does not occupy external space, the structure is more compact, which can further reduce manufacturing costs. Attached Figure Description
[0020] Figure 1 This is a cross-sectional view of the injection blow molding device of this utility model when the mold is closed.
[0021] Figure 2 This is a cross-sectional view of the injection blow molding device described in this utility model when the mold is opened.
[0022] Figure 3 This is a schematic diagram of the arrangement structure on the fixed mold side.
[0023] Figure 4 This is a schematic diagram of the arrangement structure on the moving mold side.
[0024] Figure 5 yes Figure 2 A schematic diagram of the cross-sectional structure of the template in the AA direction.
[0025] Figure 6 yes Figure 2 Schematic diagram of the cross-sectional structure of the BB-direction template removal.
[0026] Figure 7 yes Figure 1 A schematic diagram of the partial structure in the left-view direction.
[0027] Figure 8 This is a schematic diagram of the structure when a pair of injection blow molding half-molded parts are closed.
[0028] Figure 9 This is a schematic diagram of the structure of a pair of bottle neck injection blow molding half-molds when they are opened.
[0029] Figures 1 to 9The reference numerals in the attached drawings are as follows: 1. Fixed mold base; 11. Guide positioning hole; 111. Guide sleeve; 15. Hot runner; 2. Moving mold base; 201. Ejector pin through hole; 21. Guide post; 3. Bottle body injection mold; 37. Bottle body injection cavity; 4. Bottle body blow mold; 40. Bottle body blow cavity bottom; 41. Bottle body blow mold half mold; 410. Blow ejection cylinder; 4100. Blow sliding seat; 411. Blow guide slope; 43. Blow locking plate; 431. Blow guide slope; 47. Bottle body blow cavity half cavity; 5. Demolding frame; 51. Demolding support plate; 511. Guide sleeve; 52. Demolding plate; 521. Reset boss; 522. Guide reset notch; 523. Guide reset groove; 528. Demolding support platform; 53. Reset pull rod; 55. Reset spring; 6. Demolding... Mold top plate, 60, ejector pin, 7, injection blow molding core, 70, sliding support seat, 71, sliding core seat, 710, mold moving cylinder, 72, core pressure plate, 75, spring limit seat, 751, spring mounting hole, 752, pull rod through hole, 753, limiting surface, 8, bottle neck injection blow molding half mold, 80, bottle neck half seat, 8001, mold closing through hole, 8002, spring mounting hole, 8011, demolding guide slope, 803, demolding boss, 81, bottle neck half part, 83, inclined wedge block, 830, base, 831, inclined guide platform, 8311, demolding guide slope, 832, neck-shaped connection, 84, connecting bolt, 85, compression spring, 86, compression spring, 87, limit nut, 88, tightening nut, 91, plastic preform, 92, plastic bottle. Detailed Implementation
[0030] The following describes in detail, with reference to the accompanying drawings, the specific implementation scheme of the core translation compact injection blow molding device of this utility model.
[0031] like Figure 1 and Figure 2 As shown, the core-translation compact injection blow molding device of this utility model includes: a fixed mold base 1, a movable mold base 2 that translates relative to the fixed mold base 1, a demolding frame 5 slidably mounted on the movable mold base 2 via four guide posts 21 respectively located at the four corners of the movable mold base 2, and a demolding advance / retreat driving device for driving the demolding frame 5 forward and backward; the fixed mold base 1 is provided with two bottle injection molds 3 and three bottle blow molds 4 spaced apart, that is: the bottle injection molds 3 are arranged between two adjacent bottle blow molds 4, and the bottle injection molds 3 have eight bottle injection cavities 37 (see Figure 3As shown), the bottle blow molding mold 4 includes: a pair of openable and closable bottle blow molding half molds 41, and a bottle blow molding cavity bottom 40 disposed between the pair of bottle blow molding half molds 41. The specific arrangement of the pair of openable and closable bottle blow molding half molds 41 is as follows: blow molding locking templates 43 are respectively provided on both sides of the pair of bottle blow molding half molds on the fixed mold base 1. Blow molding guide slopes 431 are provided on the mounting surface of the blow molding locking template 43, i.e., its inner side surface, from the end closest to the moving mold base 2. The bottle blow molding half mold 41 is provided with blow molding guide slopes 431 corresponding to the blow molding guide slopes 431 on the corresponding blow molding locking template 43. The guide slope 411; the fixed mold base 1 is provided with bottle cavity opening and closing driving devices that cooperate with each pair of bottle body blow molding half molds 41, the specific structure of which includes: a blow molding ejection cylinder 410 provided on the fixed mold base 1, a blow molding sliding seat 4100 provided on the piston rod of the blow molding ejection cylinder 410, the bottom 40 of the bottle body blow molding cavity being provided on the blow molding sliding seat 4100, and a pair of bottle body blow molding half molds 41 being slidably provided on the blow molding sliding seat 4100 (which is conventional technology in the art and will not be described in detail here); the bottle body blow molding half mold 41 has eight openings corresponding to the opening and closing driving devices of each pair of bottle body blow molding half molds 41. The bottle body injection molding cavity 37 corresponds to the bottle body blow molding half cavity 47. When the bottle body blow molding half mold 41 is closed, the corresponding bottle body blow molding half cavity 47 on each pair of bottle body blow molding half molds 41 and the corresponding bottle body blow molding cavity bottom 40 constitute the bottle body blow molding cavity; above the moving mold base 2, a demolding top plate 6, a sliding support seat 70 and a sliding core seat 71 are arranged in sequence. The sliding support seat 70 is fixed on the moving mold base 2, and the sliding core seat 71 is slidably arranged on the sliding support seat 70 (which is a conventional technology in the art and will not be described in detail here). The sliding support seat 70 is provided with a mold moving cylinder 710 as a mold moving drive device. (For driving the translation of the sliding core seat 71), the sliding core seat 71 is provided with four injection blow molding core groups through four pairs of core pressure plates 72. Each injection blow molding core group includes eight injection blow molding cores 7 corresponding to eight bottle body injection cavities 37 in the bottle body injection mold 3. Each injection blow molding core group has a pair of openable bottle neck injection blow molding half molds 8 on both sides. The bottle neck injection blow molding half mold 8 includes a bottle neck half seat 80, and the bottle neck half seat 80 is provided with bottle neck half parts 81 corresponding one-to-one with the bottle body injection cavities 37. The bottle neck half seats 80 in each pair of bottle neck injection blow molding half molds 8 are elastically connected together, such as Figure 8 and Figure 9 As shown, its specific connection structure includes: two compression springs 85 and 86; the bottle mouth half-seat 80 has a mold-closing through hole 8001 along the opening and closing direction; the bottle mouth half-seat 80 has a spring mounting hole 8002 on its outer side opposite to the mold-closing through hole 8001, which cooperates with the compression spring, forming a stepped hole that is larger on the outside and smaller on the inside; after selecting the connecting bolt 84 to fit the compression spring 85, it is sequentially installed from one side ( Figure 8 and Figure 9The spring mounting hole 8002 and the mold closing through hole 8001 of the bottle neck half seat 80 (on the left side) are passed through, and then sequentially from the other side ( Figure 8 and Figure 9 After the compression spring 86 is installed through the mold closing through hole 8001 and spring mounting hole 8002 of the bottle neck half seat 80 (right side of the mold), the upper limit nut 87 and the tightening nut 88 are tightened. Each pair of bottle neck half seats 80 in the injection mold 8 has a demolding guide slope 8011 arranged from bottom to top and outward on the opposite end faces of each end. The core pressure plate 72 is provided with a wedge block 83, which includes: a base 830 and a sloped guide platform 831 provided on the base 830 through a neck-shaped connecting part 832. The sloped guide platform 831 is provided with corresponding bottle neck half seats 80 on both sides. The demolding guide slope 8011 on the upper part corresponds to the demolding guide slope 8311; the demolding frame 5 includes: a pair of demolding templates 52 that span the corresponding ends of all bottle neck injection blow molds 8 (one demolding template 52 spans one end of all bottle neck injection blow molds 8, and the other demolding template 52 spans the other end of all bottle neck injection blow molds 8) and a pair of demolding support plates 51 that connect the corresponding ends of the pair of demolding templates 52, forming a square frame structure. The demolding support plates 51 are provided with guide post mounting holes that correspond one-to-one with the guide posts 21. Guide sleeves 511 are provided in the guide post mounting holes, and the guide posts 21 are movably disposed in the corresponding guide sleeves 511, such as Figures 4 to 7As shown, the pair of ejector molds 52 are respectively provided with downwardly penetrating guide reset notches 522 on their inner lower parts, forming reset bosses 521. Furthermore, the guide reset notches 522 are provided with ejector support platforms 528 at their lower edges facing the bottle body injection mold 3, forming guide reset grooves 523. The bottle neck injection blow mold 8 is provided with ejector bosses 803 corresponding to the guide reset grooves 523, so that the ejector bosses 803 on each pair of bottle neck injection blow molds 8 facing the bottle body injection mold 3 are slidably positioned in the corresponding guide reset grooves 523. The fixed mold base 1 is provided with guide positioning holes 11 corresponding to the guide pillars 21, and guide sleeves 111 are provided in the guide positioning holes 11. The ejector advance and retreat drive device includes: an ejector rod 60 arranged facing the ejector top plate 6, and an ejector rod through hole 201 corresponding to the ejector rod 60 on the moving mold base 2 (which is conventional technology in the art and will not be described in detail here); the pair of ejector supports A reset pull rod 53 is provided between plate 51 and demolding top plate 6, and a reset spring 55 is sleeved on the reset pull rod 53. The reset spring 55 is located between the demolding top plate 6 and the sliding support seat 70. Specifically, the sliding support seat 70 is provided with a spring limiting seat 75. The bottom surface of the spring limiting seat 75 has a spring mounting hole 751 that cooperates with the reset spring 55. The bottom wall of the spring mounting hole 751 has a part that cooperates with the reset pull rod 53. The matching pull rod through hole 752, after the reset pull rod 53 is fitted with the reset spring 55, it passes through the spring mounting hole 751 and the pull rod through hole 752 on the spring limiting seat 75. The upper end of the reset spring 55 abuts against the bottom wall of the spring mounting hole 751 on the spring limiting seat 75. In this embodiment, the inner sides of the spring limiting seats 75 on both sides are provided with limiting surfaces 753 for limiting the position of the sliding core seat 71 after translation, so that the sliding core seat 71 is more accurately positioned after translation.
[0032] In practical applications, the demolding and pushing device equipped with the ejector rod 60 is installed on the body of the translational injection blow molding machine.
[0033] The working process of this utility model is as follows: the mold closes, the plasticized plastic enters the injection cavity 37 of the bottle body through the hot runner 15, and after the preform 91 is formed by temperature control, the mold opens, the moving mold retracts, and the bottle neck blow molding half mold 8 and the blow molding core 7, along with the preform 91, are ejected from the injection cavity 37. The blow molding ejection cylinder 410 pushes the bottle body blow molding half mold 41 forward and opens along the blow molding guide slope 431 of the blow molding locking platen 43. The moving mold retracts to the set position. Then, the mold moving cylinder 710 drives the sliding core seat 71 and the blow molding core 7 and the bottle neck blow molding half mold 8 to move a distance, so that the preform 91 is ejected from the injection cavity 37. The bottle neck splitter 81 of the preform 91 and the injection blow molding core 7 are aligned with the bottle body blow molding mold 4, and the injection blow molding core 7 of the unplasticized preform 91 is aligned with the bottle body injection molding mold 3. Then the molds are closed, and the blow molding cavity half mold 41 is pressed back by the ejector plate 5 and closed along the blow molding guide slope 431 on the blow molding locking plate 43. After the molds are closed, the plasticized plastic enters the bottle body injection molding cavity 37 through the hot runner 15. After temperature control, the preform is formed. At the same time, the injection blow molding core 7 opens the air inlet to allow air to enter and push the piston to open the core head (this is a conventional technique in this field and will not be described in detail here). The injection blow molding core 7 in the bottle body blow molding half cavity 47 is opened by the corresponding air inlet. Compressed air is blown in through the air vents and then blown out through the air outlet between the movable core head and the core body (this is a conventional technique in the field and will not be described in detail here). After blowing for a certain period of time, the plastic bottle 92 is cooled and formed. After the preform and blow molding are completed, the moving mold retracts, and the injection blow core 7 and the bottle neck injection blow mold 8 on the injection molding station retract with the plastic preform 91. At the same time as the moving mold retracts, the blow molding ejection cylinder 410 on the blow molding station ejects the bottle body blow molding mold 41. The bottle body blow molding mold 41 opens at the same time as it is ejected, and the injection blow core 7 and the bottle neck injection blow mold 8 on the blow molding station carry the formed plastic bottle. After the moving mold retracts to its original position, the mold-moving cylinder 710 drives the sliding core seat 71 and the injection blow core 7 and the bottle neck injection blow mold 8 to move a distance. The blow-molded plastic bottle 92 on the blow molding station moves to the injection molding station, and the plastic bottle preform 91 on the injection molding station moves to the corresponding blow molding station. The demolding frame 5 pushes forward, and the bottle neck injection blow mold 8 with the plastic bottle 92 is pushed forward and opened by the demolding support 528 on the demolding plate 52 to remove the plastic bottle 92 from the injection blow core 7. Then the demolding plate retracts, and the bottle neck injection blow mold 8 with the plastic bottle 92 removed returns to its original position. This cycle repeats.
[0034] In summary, the above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model. All equivalent variations and modifications made to the shape, structure, features and spirit described in the claims of the present utility model should be included within the scope of the claims of the present utility model.
Claims
1. A core translation compact injection blow molding apparatus comprising: A fixed mold base and a movable mold base that translates relative to the fixed mold base are characterized in that the fixed mold base is provided with N bottle injection molds and N+1 bottle blow molds spaced apart, that is: the bottle injection molds are arranged between two adjacent bottle blow molds, the bottle injection molds have a plurality of bottle injection cavities, the bottle blow molds include a pair of openable bottle blow mold halves and bottle blow cavity bottoms disposed between the bottle blow mold halves, and the fixed mold base is provided with bottle cavity opening and closing driving devices corresponding to each pair of bottle blow mold halves; the bottle blow mold halves have bottle blow molding parts corresponding to the bottle injection cavities. When the bottle body blow molding half-molds are closed, the corresponding bottle body blow molding half-cavities on each pair of bottle body blow molding half-molds and the bottom of the bottle body blow molding cavity form the bottle body blow molding cavity; above the moving mold base, a demolding top plate, a sliding support seat, and a sliding core seat are arranged in sequence. The sliding support seat is fixed on the moving mold base, and the sliding core seat is slidably arranged on the sliding support seat. The sliding support seat is equipped with a mold moving drive device for driving the sliding core seat to move. The sliding core seat is respectively equipped with 2N injection blow molding core groups through core pressure plates. Each injection blow molding core group includes: an injection blow molding core corresponding to the bottle body injection molding cavity in the injection mold. A pair of movable cores are arranged on both sides of each injection blow molding core group. The bottle neck injection blow molding half mold includes: a bottle neck half seat, on which bottle neck half parts are provided, each corresponding to a one-to-one injection cavity of the bottle body; the bottle neck half seats in each pair of bottle neck injection blow molding half molds are elastically connected together, and each of their two opposite end faces is provided with a demolding guide slope arranged from bottom to top and outward; the core plate is provided with a wedge block, and on both sides of the wedge block are demolding guide slopes corresponding to the demolding guide slopes on the corresponding side bottle neck half seat; the injection blow molding device also includes: a demolding frame slidably mounted on a demolding seat via at least a pair of guide pillars, and a mechanism for driving the demolding frame forward. The demolding advance and retreat drive device includes a demolding frame comprising a pair of demolding plates that span the corresponding ends of all the bottle neck injection blow molds, i.e., one demolding plate spans one end of all the bottle neck injection blow molds and the other demolding plate spans the other end of all the bottle neck injection blow molds. The pair of demolding plates are provided with downwardly penetrating guide reset notches on their inner lower parts. Furthermore, the guide reset notches are provided with demolding support platforms at the lower edge of the injection mold directly opposite to the mold, forming guide reset grooves, so that the pair of bottle neck injection blow molds directly opposite the injection mold are slidably positioned in the corresponding guide reset grooves. The fixed mold base is provided with guide positioning holes that correspond one-to-one with the guide pillars.
2. The core-translation compact injection blow molding apparatus according to claim 1, wherein The specific arrangement of the pair of openable and closable bottle blow molding half molds is as follows: blow molding locking templates are respectively provided on both sides of the pair of bottle blow molding half molds on the fixed mold base. Blow molding guide slopes are provided on the mounting surface of the blow molding locking template, i.e., its inner side surface, from the end closest to the moving mold base. Blow molding guide slopes are provided on the bottle blow molding half molds, corresponding to the blow molding guide slopes on the corresponding blow molding locking templates. The bottle cavity opening and closing drive device includes: a blow molding ejection cylinder provided on the fixed mold base. A blow molding sliding seat is provided on the piston rod of the blow molding ejection cylinder. The cavity bottom is provided on the blow molding sliding seat. The pair of bottle blow molding half molds are slidably provided on the blow molding sliding seat.
3. The core-translation compact injection blow molding apparatus according to claim 1, wherein The specific connection structure between the bottle neck half-seats in each pair of bottle neck injection molds includes: two compression springs. The bottle neck half-seats are provided with through holes for mold closing along the opening and closing direction. A bolt is selected, one of the compression springs is put on, passes through the through holes for mold closing on both sides of the bottle neck half-seats, and then the other compression spring is put on and the nut is tightened.
4. The core-translation compact injection blow molding apparatus according to claim 3, wherein The bottle neck half seat has a spring mounting hole on its outer side facing the mold closing through hole, which is designed to cooperate with the compression spring, forming a stepped hole that is larger on the outside and smaller on the inside. The compression spring is set in the spring mounting hole of the corresponding bottle neck half seat.
5. The core-translation compact injection blow molding apparatus of claim 1 wherein, The demolding advance and retreat drive device includes: an ejector rod arranged facing the demolding top plate; reset pull rods are respectively arranged between the two sides of the demolding frame and the demolding top plate; reset springs are sleeved on the reset pull rods; and the reset springs are arranged between the demolding top plate and the sliding support seat.
6. The core-translation compact injection blow molding apparatus of claim 5, wherein The moving mold base is provided with ejector through holes corresponding to the ejector rods.
7. The core-translation compact injection blow molding apparatus of claim 5, wherein The sliding support seat is provided with a spring limiting seat, and the spring limiting seat has a pull rod through hole that cooperates with the reset pull rod. The reset pull rod is movably inserted into the pull rod through hole on the spring limiting seat, and the upper end of the reset spring abuts against the spring limiting seat.
8. The core-translation compact injection blow molding apparatus of claim 7, wherein, The bottom surface of the spring limiting seat is provided with a spring mounting hole that cooperates with the reset spring, and the reset spring is set in the spring mounting hole on the spring limiting seat.
9. The core-translation compact injection blow molding apparatus of claim 1, wherein The aforementioned mold-moving drive device is a cylinder.
10. The core-translation compact injection blow molding apparatus according to any one of claims 1 to 9, characterized in that, The demolding frame has guide post mounting holes corresponding to the guide posts, and guide sleeves are provided in the guide post mounting holes. The guide posts are movably mounted in the corresponding guide sleeves.