Core translation type cylindrical bottle injection blow molding device
Through the split structure and synchronous moving design, the problem of the bottle mouth Haf piece needs to be removed is solved, and the injection-blowing molding device without opening and closing of the bottle body blow mold is realized, which improves production capacity and reduces costs.
Patent Information
- Application Number
- CN202510634263.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-16
- Publication Date
- 2025-08-01
AI Technical Summary
In the existing core translation injection and blow molding device, the bottle mouth Haf piece needs to be moved away from the injection and blow molding core before it can be moved, resulting in a large space occupied by the moving mold side, complex structure and high cost, and the blow mold of the bottle body needs to be opened before it can be released, which affects production capacity.
Using a split structure design, the bottle injection mold and blow mold are composed of the bottle injection mold and the bottle blow mold and a pair of bottle mouth injection and blow molds, respectively. The bottle mouth Harves and the core move simultaneously, and the guide reset chute and elastic connection structure are used to realize synchronous movement, simplifying the mold opening process.
The mold opening time is shortened, the production capacity is improved, the height and material cost of the moving die side is reduced, the service life of the injection blowing parts is extended, the structure is more compact, and the manufacturing cost is reduced.
Smart Images
Figure CN120396299A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a injection-blow molding device, and more particularly to a core translation type injection-blow molding device. Background Art
[0002] Currently, for the core translation type injection-blow molding device used for plastic bottle injection-blow molding, its structure generally includes a fixed mold base and a movable mold base that makes a translation movement relative to the fixed mold base. N bottle body injection molds and N + 1 bottle body blow molds are arranged alternately on the fixed mold base. A plurality of bottle body injection cavities are formed on the bottle body injection molds. 2N + 1 pairs of bottle mouth half molds corresponding one by one to the N bottle body injection molds and N + 1 bottle body blow molds, and 2N groups of injection-blow cores are arranged on the movable mold base. During the actual working process, since the injection-blow cores need to continuously move back and forth between the injection station and the blow molding station, while the bottle mouth half molds do not, in this case, the bottle mouth half molds need to be moved away from the injection-blow cores before the injection-blow cores can be moved; in order to ensure that the bottle mouth half molds can be completely moved away from the injection-blow cores, it is necessary to ensure that there is enough height on the movable mold side, resulting in a relatively large space occupied by the movable mold side and the structure is not compact enough. Moreover, since the stroke of the bottle mouth half molds is relatively long, it takes a long time, which affects the production capacity. In addition, since the traditional bottle body blow mold needs to open a pair of bottle body blow half molds to take out the formed bottle from the cavity, a driving mechanism for opening the bottle body blow mold is required, resulting in a relatively large space occupied by the bottle body blow mold, a complex structure, a relatively high cost, and when the bottle body blow half molds are opened, they need to move and open a certain distance while moving towards the movable mold opening side, increasing the moving distance of the movable mold during opening and closing, and the time for opening and closing the mold is relatively long. Summary of the Invention
[0003] The technical problem to be solved by the present invention is to provide a core translation type cylindrical bottle injection-blow molding device in which the bottle body blow mold does not need to be opened, the structure is simple and compact, and the bottle mouth half mold and the core move synchronously.
[0004] To solve the above technical problems, the technical solution adopted by the present invention is as follows: A cylindrical bottle injection-blow molding device with a core translation type, comprising: a fixed mold base, a movable mold base that makes a translation movement relative to the fixed mold base, a demolding frame slidably arranged on the demolding base through at least a pair of guide posts, and a demolding advancing and retracting driving device for driving the demolding frame to advance and retract. One by one, N bottle body injection molds and N + 1 bottle body blow molds are arranged on the fixed mold base, that is: the bottle body injection molds are arranged between two adjacent bottle body blow molds. A plurality of bottle body injection cavities are formed on the bottle body injection molds, and corresponding bottle body blow cavities are arranged on the bottle body blow molds; above the movable 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 movable mold base, and the sliding core seat is slidably arranged on the sliding support seat. A mold moving driving device for driving the sliding core seat to translate is arranged on the sliding support seat. 2N injection-blow core groups are respectively arranged on the sliding core seat through core pressing plates. Each injection-blow core group includes: an injection-blow core corresponding to the bottle body injection cavity in the injection mold. A pair of openable and closable bottle mouth injection-blow half molds are arranged on both sides of each injection-blow core group. The bottle mouth injection-blow half mold includes: a bottle mouth half seat. A bottle mouth half part corresponding to the bottle body injection cavity one by one is arranged on the bottle mouth half seat. A bottle mouth forming half cavity and a bottle shoulder forming half cavity are arranged on the bottle mouth half part. Correspondingly, an annular protruding part corresponding to the bottle shoulder forming half cavity is arranged around the port of the bottle body injection cavity on the bottle body injection mold. An annular sealing convex platform is arranged at the port of the bottle body injection cavity close to the bottle body injection cavity. When the mold is closed, the end face of the annular sealing convex platform presses against the inner wall of the bottle shoulder forming half cavity to form a sealant surface, and an avoidance gap is formed between the annular protruding part and the inner wall of the bottle shoulder forming half cavity; the bottle mouth half seats in each pair of bottle mouth injection-blow half molds are elastically connected together, and demolding guiding inclined surfaces arranged obliquely outward from bottom to top are respectively opened on the opposite end faces at both ends thereof. A wedge block is arranged on the core pressing plate. Demolding guiding inclined surfaces corresponding to the demolding guiding inclined surfaces on the corresponding bottle mouth half seats on both sides are respectively arranged on both sides of the wedge block; the demolding frame includes: a pair of demolding plates respectively straddling the corresponding ends of all the bottle mouth injection-blow half molds, that is: one demolding plate straddles one end of all the bottle mouth injection-blow half molds, and the other demolding plate straddles the other end of all the bottle mouth injection-blow half molds. Downward through guiding and resetting notches are respectively arranged at the inner lower parts of the pair of demolding plates. And a demolding support platform is arranged at the lower edge of the guiding and resetting notch facing the injection mold to form a guiding and resetting chute, so that a pair of bottle mouth injection-blow half molds facing the injection mold are slidably arranged in the corresponding guiding and resetting chutes; guiding and positioning holes corresponding to the guide posts are formed on the fixed mold base.
[0005] As a preferred solution, in the described core translation type cylindrical bottle injection blow molding device, the specific connection structure between the bottle mouth half molds in each pair of bottle mouth injection blow half molds includes: two compression springs. Through holes for mold closing are provided on the bottle mouth half seats along the opening and closing direction. One of the compression springs is selected and passed through the through holes for mold closing on the bottle mouth half seats on both sides, then another compression spring is sleeved on it, and finally a nut is screwed on.
[0006] On the outer side of the bottle mouth half seat, a spring placement hole that cooperates with the compression spring is provided opposite to the through hole for mold closing, forming a stepped hole with a larger outer diameter and a smaller inner diameter. The compression spring is arranged in the spring placement hole of the corresponding bottle mouth half seat.
[0007] As a preferred solution, in the described core translation type cylindrical bottle injection blow molding device, the demolding advance and retreat driving device includes: a push rod arranged opposite to the demolding top plate. Reset pull rods are respectively arranged between both sides of the demolding frame and the demolding top plate. A reset spring is sleeved on the reset pull rod, and the reset spring is arranged between the demolding top plate and the sliding support seat.
[0008] As a preferred solution, in the described core translation type cylindrical bottle injection blow molding device, a push rod through hole corresponding to the push rod is provided on the moving mold base.
[0009] As a preferred solution, in the described core translation type cylindrical bottle injection blow molding device, spring limit seats are respectively arranged on both sides of the sliding support seat. A pull rod through hole that cooperates with the reset pull rod is provided on the spring limit seat. The reset pull rod is movably inserted through the pull rod through hole on the spring limit seat, and the upper end of the reset spring abuts against the spring limit seat.
[0010] As a preferred solution, in the described core translation type cylindrical bottle injection blow molding device, a spring placement hole that cooperates with the reset spring is provided on the bottom surface of the spring limit seat. The reset spring is arranged in the spring placement hole of the spring limit seat.
[0011] As a preferred solution, in the described core translation type cylindrical bottle injection blow molding device, limit surfaces for defining the position of the sliding core seat after translation are arranged on the inner sides of both spring limit seats.
[0012] As a preferred solution, in the described core translation type cylindrical bottle injection blow molding device, the mold moving driving device is a cylinder.
[0013] As a preferred solution, in the described core translation type cylindrical bottle injection blow molding device, a guide post installation hole corresponding to the guide post is provided on the demolding frame. A guide sleeve is arranged in the guide post installation hole, and the guide post is movably arranged in the corresponding guide sleeve.
[0014] The beneficial effects of the present invention are as follows:
[0015] 1. In the present invention, the injection mold and the blow mold are integrally designed into a split structure, that is, the injection mold and the blow mold are respectively composed of a bottle body injection mold, a bottle body blow mold and a pair of bottle mouth injection-blow half molds with the same structure. When the injection-blow core is translated, each pair of bottle mouth injection-blow half molds moves together, so there is no need to spend time removing them from the injection-blow core, shortening the mold opening stroke of the bottle mouth injection-blow half molds, thus shortening the mold opening time of the bottle mouth injection-blow half molds and improving the production capacity. Moreover, the height of the moving mold side is also reduced, making the structure of the moving mold side more compact and reducing the material cost.
[0016] 2. In the present invention, the bottle shoulder forming half cavity is arranged on the bottle mouth half split mold, and only the cavity corresponding to the straight barrel part of the bottle body is reserved on the bottle body injection mold and the bottle body blow mold. In this way, the bottle body blow mold does not need to open and close, and the formed bottle is directly pulled out from the straight barrel cavity, so that the mold opening distance of the moving mold can be reduced, making the structure of the moving mold side more compact and further reducing the material cost. And by arranging an annular convex part corresponding to the bottle shoulder forming half cavity around the port of the bottle body injection cavity on the bottle body injection mold, and arranging an annular sealing convex platform at the port of the annular convex part close to the bottle body injection cavity. When the mold is closed, the end face of the annular sealing convex platform presses against the inner wall of the bottle shoulder forming half cavity to form a sealant surface, ensuring the normal progress of the injection process. In addition, since there is an avoidance gap between the annular convex part and the inner wall of the bottle shoulder forming half cavity, the contact area between the injection-blow half split mold and the bottle body injection mold and the bottle body blow mold during mold closing is reduced, thus prolonging the service life of the bottle body injection mold, the bottle body blow mold and the injection-blow half split mold.
[0017] 3. At the lower edge of the guiding and resetting notch of the present invention facing the injection mold, a demolding support platform is arranged to form a guiding and resetting chute, so that a pair of bottle mouth injection-blow half molds facing the injection mold are constrained in the corresponding guiding and resetting chute. Thus, the bottle mouth injection-blow half molds can be pushed and opened by the demolding support platform at the injection station to demold the formed plastic bottle from the injection-blow core, making the time for the injection-blow core to switch stations overlap with the cooling time of the plastic bottle, thereby further improving the production capacity and reducing the production cost.
[0018] 4. In the present invention, a mold closing through hole is arranged along the opening and closing direction on the bottle mouth half split seat, and then a pair of bottle mouth injection-blow half molds are elastically connected by two bolts, nuts and two compression springs. Its structure is very simple and practical, greatly reducing the manufacturing cost.
[0019] 5. In the present invention, a spring placement hole cooperating with a pressing spring is provided on the outer side of the bottle mouth half seat right opposite to the through hole for mold closing, which on the one hand makes the expansion and contraction of the pressing spring more stable, and on the other hand, since the pressing spring does not occupy external space, the structure is more compact, and the manufacturing cost can be further reduced.
[0020] 6. In the present invention, a spring placement hole cooperating with a return spring is provided on the bottom surface of the spring limit seat, which on the one hand makes the expansion and contraction of the return spring more stable, and on the other hand, since the return spring does not occupy external space, the structure is more compact, and the manufacturing cost can be further reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 is a schematic cross-sectional structure view when the mold of the injection-blow molding device of the present invention is closed.
[0022] Figure 2 is a schematic cross-sectional structure view when the mold of the injection-blow molding device of the present invention is opened.
[0023] Figure 3 is a schematic layout structure view of the fixed mold side.
[0024] Figure 4 is a schematic layout structure view of the moving mold side.
[0025] Figure 5 is Figure 2 a schematic cross-sectional structure view of the stripping plate in the A-A direction in
[0026] Figure 6 is Figure 2 a schematic cross-sectional structure view of the stripping plate in the B-B direction in
[0027] Figure 7 is Figure 1 a partial structure view in the left view direction of
[0028] Figure 8 is Figure 1 an enlarged structure view of part E in
[0029] Figure 9 a schematic structure view when a pair of bottle mouth injection-blow half molds are closed.
[0030] Figure 10 a schematic structure view when a pair of bottle mouth injection-blow half molds are opened.
[0031] Figures 1 to 10The reference numerals in the figures are respectively: 1, fixed mold base; 11, guiding and positioning hole; 111, guide bushing; 15, hot runner; 2, moving mold base; 201, ejector rod through-hole; 21, guide pillar; 3, bottle injection mold; 37, bottle injection cavity; 4, bottle blow molding mold; 45, annular protrusion; 451, annular sealing boss; 47, bottle blow molding cavity; 5, demolding frame; 51, demolding support plate; 511, guide bushing; 52, demolding plate; 521, reset boss; 522, guiding and reset notch; 523, guiding and reset chute; 528, demolding support table; 53, reset pull rod; 55, reset spring; 6, demolding top plate; 60, ejector rod; 7, injection-blowing core; 70, sliding support seat; 71, sliding core seat; 710, moving mold cylinder; 72, core pressing plate; 75, spring limit seat; 751, spring placement hole; 752, pull rod through-hole; 753, limiting surface; 8, bottle mouth injection-blowing half mold; 80, bottle mouth half split mold; 8,001, through-hole for mold closing; 8,002, spring placement hole; 8,011, demolding guiding inclined surface; 803, demolding boss; 81, bottle mouth half split part; 811, bottle mouth forming half cavity; 812, bottle shoulder forming half cavity; 813, sealing surface; 815, avoidance gap; 83, wedge block; 830, base; 831, inclined guiding platform; 8311, demolding guiding inclined surface; 832, neck-shaped connecting part; 84, connecting bolt; 85, pressing spring; 86, pressing spring; 87, limiting nut; 88, locking nut; 91, plastic bottle preform; 92, plastic bottle. Detailed implementation manners
[0032] The following combines with the attached drawings to describe in detail the specific implementation scheme of a core translation type cylindrical bottle injection-blow molding device according to the present invention.
[0033] As Figure 1 and Figure 2 shown, the core translation type cylindrical bottle injection-blow molding device according to the present invention has a structure including: a fixed mold base 1, a moving mold base 2 that makes a translational movement relative to the fixed mold base 1, a demolding frame 5 slidably arranged on the moving mold base 2 through four guide pillars 21 respectively arranged at four corners of the moving mold base 2, and a demolding advancing and retracting driving device for driving the demolding frame 5 to advance and retreat. Two bottle injection molds 3 and three bottle blow molding molds 4 are arranged alternately on the fixed mold base 1, that is: the bottle injection mold 3 is arranged between two adjacent bottle blow molding molds 4. Eight bottle injection cavities 37 are opened on the bottle injection mold 3, and eight corresponding bottle blow molding cavities 47 are opened on the bottle blow molding mold 4 (see Figure 3as shown in the figure; above the moving mold base 2, a demolding top plate 6, a sliding support base 70, and a sliding core base 71 are sequentially arranged. The sliding support base 70 is fixed on the moving mold base 2, and the sliding core base 71 is slidably arranged on the sliding support base 70 (which belongs to the conventional technology in the field and will not be described in detail here). A moving mold cylinder 710 serving as a moving mold driving device is arranged on the sliding support base 70 (for driving the translation of the sliding core base 71). Four injection and blow molding core groups are respectively arranged on the sliding core base 71 through four pairs of core pressing plates 72. Each injection and blow molding core group includes: eight injection and blow molding cores 7 corresponding to eight bottle injection cavities 37 in the bottle injection mold 3. A pair of openable and closable bottle mouth injection and blow molding half molds 8 are arranged on both sides of each injection and blow molding core group. The bottle mouth injection and blow molding half mold 8 includes: a bottle mouth half seat 80, and a bottle mouth half part 81 corresponding to the bottle injection cavity 37 one by one is arranged on the bottle mouth half seat 80. As Figure 8 shown, a bottle mouth forming half cavity 811 and a bottle shoulder forming half cavity 812 are arranged on the bottle mouth half part 81. Correspondingly, an annular protruding part 45 corresponding to the bottle shoulder forming half cavity 812 is arranged around the port of the bottle injection cavity 37 on the bottle injection mold 3. An annular sealing boss 451 is arranged at the port of the annular protruding part 45 close to the bottle injection cavity 37. When the mold is closed, the end face of the annular sealing boss 451 presses against the inner wall of the bottle shoulder forming half cavity 812 to form a sealing surface 813, and an avoidance gap 815 is formed between the annular protruding part 45 and the inner wall of the bottle shoulder forming half cavity 812; the bottle mouth half seats 80 in each pair of bottle mouth injection and blow molding half molds 8 are elastically connected together. As Figure 9 and Figure 10 shown, the specific connection structure includes: two compression springs 85 and 86. A mold closing through hole 8001 is opened on the bottle mouth half seat 80 along the opening and closing direction. A spring placement hole 8002 matching the compression spring is opened on the outer side of the bottle mouth half seat 80 opposite to the mold closing through hole 8001 to form a stepped hole with a large outer diameter and a small inner diameter. After a connecting bolt 84 is sleeved with a compression spring 85, it sequentially passes through the spring placement hole 8002 and the mold closing through hole 8001 of the bottle mouth half seat 80 on one side ( Figure 9 and Figure 10 the left side in the figure), and then sequentially passes through from the other side ( Figure 8 and Figure 9After passing through the through holes 8001 for mold clamping and the spring placement holes 8002 of the bottle mouth half seat 80 on the right side in [description], sleeving and pressing the compression spring 86, then screwing on the limit nut 87 and the lock nut 88; on each pair of bottle mouth injection blow half molds 8, the bottle mouth half seats 80 are respectively provided with demolding guiding inclined surfaces 8011 arranged obliquely outward from bottom to top on the opposite end faces at both ends. The core pressing plate 72 is provided with a wedge block 83, and the wedge block 83 includes: a base 830, and an inclined guiding platform 831 arranged on the base 830 through a neck-shaped connecting portion 832. Demolding guiding inclined surfaces 8311 corresponding to the demolding guiding inclined surfaces 8011 on the corresponding side of the bottle mouth half seat 80 are respectively arranged on both sides of the inclined guiding platform 831; on the moving mold base 2, a demolding frame 5 is slidably arranged through four guide posts 21 respectively arranged at its four corners. The demolding frame 5 includes: a pair of demolding plates 52 arranged towards the corresponding ends of all the bottle mouth injection blow half molds 8, and a pair of demolding support plates 51 respectively connecting the corresponding ends of this pair of demolding plates 52, forming a square frame structure. Guide post mounting holes corresponding to the guide posts 21 are opened on the demolding support plates 51, and guide sleeves 511 are arranged in the guide post mounting holes. The guide posts 21 are movably arranged in the corresponding guide sleeves 511, such as Figures 4 to 7As shown, each of the pair of demolding templates 52 is provided with a downwardly penetrating guiding and resetting notch 522 and a resetting boss 521 at its lower inner side. Moreover, the guiding and resetting notch 522 is provided with a demolding support platform 528 and a guiding and resetting chute 523 formed at the position opposite to the lower edge of the bottle body injection mold 3. A demolding boss 803 corresponding to the guiding and resetting chute 523 is provided on the bottle mouth injection blow half mold 8, so that the demolding bosses 803 on each pair of bottle mouth injection blow half molds 8 opposite to the bottle body injection mold 3 are slidably arranged in the corresponding guiding and resetting chutes 523; a guiding and positioning hole 11 corresponding to each of the guide posts 21 is formed in the fixed mold base 1, and a guide sleeve 111 is arranged in the guiding and positioning hole 11; the demolding advancing and retracting driving device includes: a ejector rod 60 arranged opposite to the demolding top plate 6, and a ejector rod through hole 201 corresponding to the ejector rod 60 is formed in the moving mold base 2 (which belongs to the conventional technology in the art and will not be described in detail here); a resetting pull rod 53 is respectively arranged between the pair of demolding support plates 51 and the demolding top plate 6, and a resetting spring 55 is sleeved on the resetting pull rod 53. The resetting spring 55 is arranged between the demolding top plate 6 and the sliding support seat 70. The specific setting method is as follows: a spring limiting seat 75 is arranged on the sliding support seat 70, a spring placement hole 751 matching with the resetting spring 55 is formed on the bottom surface of the spring limiting seat 75, a pull rod through hole 752 matching with the resetting pull rod 53 is formed on the bottom wall of the spring placement hole 751, and the resetting pull rod 53 passes through the spring placement hole 751 and the pull rod through hole 752 on the spring limiting seat 75 after being sleeved with the resetting spring 55. The upper end of the resetting spring 55 abuts against the bottom wall of the spring placement hole 751 on the spring limiting seat 75; in this embodiment, a limiting surface 753 for limiting the position of the sliding core seat 71 after translation is arranged on the inner sides of the spring limiting seats 75 on both sides, so that the sliding core seat 71 is more accurate in place after translation.
[0034] During actual application, the demolding pushing device equipped with the ejector rod 60 is arranged on the body of the translation injection blow integrated machine.
[0035] The working process of the present invention is as follows: The mold is closed, and the plasticized plastic enters the bottle body injection cavity 37 through the hot runner 15. After the plastic bottle preform 91 is formed by temperature control, the mold is opened, and the moving mold retreats. The bottle mouth injection-blowing half mold 8 and the injection-blowing core 7 carry the plastic bottle preform 91 and are taken out of the injection cavity 37. After the moving mold retreats to the set position, the mold moving cylinder 710 drives the sliding core seat 71, the injection-blowing core 7 thereon, and the bottle mouth injection-blowing half mold 8 to move a spacing distance, so that the bottle mouth half split mold 81 with the plastic bottle preform 91 and the injection-blowing core 7 are aligned with the bottle body blow molding mold 4, and the injection-blowing core 7 without the plastic bottle preform 91 is aligned with the bottle body injection mold 3. Then, after the mold is closed in place, the plasticized plastic enters the bottle body injection cavity 37 through the hot runner 15, and the bottle preform is formed by temperature control. At the same time, the injection-blowing core 7 opens the air inlet hole to introduce air to push the piston to push open the core head (which is a conventional technology in the art and will not be described in detail here). Compressed air is blown into the injection-blowing core 7 in the bottle body blow molding cavity 47 through the corresponding air inlet hole, and is blown out through the air blowing port between the movable core head and the core body through the air passage (which is a conventional technology in the art and will not be described in detail here). After blowing for a certain time, the plastic bottle 92 is cooled and formed. After the injection preform and blow molding are completed, the moving mold retreats. The injection-blowing core 7 and the bottle mouth injection-blowing half mold 8 on the injection station retreat with the plastic bottle preform 91, and the injection-blowing core 7 and the bottle mouth injection-blowing half mold 8 on the blow molding station retreat with the formed plastic bottle 92. After the moving mold retreats in place, the mold moving cylinder 710 drives the sliding core seat 71, the injection-blowing core 7 thereon, and the bottle mouth injection-blowing half mold 8 to move a spacing distance. The blow molded plastic bottle 92 on the blow molding station moves to the injection station, and the plastic bottle preform 91 on the injection station moves to the corresponding blow molding station. The demolding frame 5 is pushed forward, and the demolding support table 528 on the demolding plate 52 is used to push the bottle mouth injection-blowing half mold 8 with the plastic bottle 92 forward and open to take off the plastic bottle 92 from the injection-blowing core 7. Then the demolding plate retreats, and the bottle mouth injection-blowing half mold 8 that has taken off the plastic bottle 92 returns to its original position, and so on in a cycle.
[0036] In summary, the above are only the preferred embodiments of the present invention, and are not used to limit the scope of implementation of the present invention. All equivalent changes and modifications made according to the shape, structure, features and spirit described in the scope of the claims of the present invention shall be included in the scope of the claims of the present invention.
Claims
1. A core translation type cylindrical bottle injection blow molding device, comprising: A fixed mold base and a movable mold base that moves translationally relative to the fixed mold base, characterized in that N bottle injection molds and N + 1 bottle blow molds are arranged alternately on the fixed mold base, that is: the bottle injection molds are arranged between two adjacent bottle blow molds. A number of bottle injection cavities are provided on the bottle injection molds, and corresponding bottle blow cavities are provided on the bottle blow molds; above the movable 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 movable mold base, and the sliding core seat is slidably arranged on the sliding support seat. A mold moving drive device for driving the sliding core seat to translate is provided on the sliding support seat. 2N injection-blow core groups are respectively arranged on the sliding core seat through core pressing plates. Each injection-blow core group includes: an injection-blow core corresponding to the bottle injection cavity in the injection mold. A pair of openable and closable bottle mouth injection-blow half molds are arranged on both sides of each injection-blow core group. The bottle mouth injection-blow half mold includes: a bottle mouth half seat. A bottle mouth half piece corresponding to the bottle injection cavity one by one is provided on the bottle mouth half seat. A bottle mouth forming half cavity and a bottle shoulder forming half cavity are provided on the bottle mouth half piece. Correspondingly, an annular protruding portion corresponding to the bottle shoulder forming half cavity is provided around the port of the bottle injection cavity on the bottle injection mold. An annular sealing boss is provided at the port of the bottle injection cavity close to the bottle injection cavity. When the mold is closed, the end face of the annular sealing boss presses against the inner wall of the bottle shoulder forming half cavity to form a sealant surface, and a clearance is formed between the annular protruding portion and the inner wall of the bottle shoulder forming half cavity; the bottle mouth half seats in each pair of bottle mouth injection-blow half molds are elastically connected together, and demolding guiding inclined surfaces arranged obliquely outward from bottom to top are respectively provided on the opposite end faces at both ends thereof. A wedge block is provided on the core pressing plate. Demolding guiding inclined surfaces corresponding to the demolding guiding inclined surfaces on the corresponding bottle mouth half seats on both sides are respectively provided on both sides of the wedge block; the cylindrical bottle injection-blow molding device further includes: a demolding frame slidably arranged on the demolding seat through at least a pair of guide posts, and a demolding advancing and retracting drive device for driving the demolding frame to advance and retract. The demolding frame includes: a pair of demolding plates respectively straddling the corresponding ends of all the bottle mouth injection-blow half molds, that is: one demolding plate straddles one end of all the bottle mouth injection-blow half molds, and the other demolding plate straddles the other end of all the bottle mouth injection-blow half molds. Downward through guiding reset notches are respectively provided at the inner lower parts of the pair of demolding plates, and a demolding support platform is provided at the lower edge of the injection mold facing the guiding reset notch to form a guiding reset chute, so that a pair of bottle mouth injection-blow half molds facing the injection mold are slidably arranged in the corresponding guiding reset chute; guiding positioning holes corresponding to the guide posts are provided on the fixed mold base.
2. The cylindrical bottle injection blow molding device with a core translation type according to claim 1, characterized in that, The specific connection structure between the bottle mouth half seats in each pair of bottle mouth injection-blow half molds includes: two compression springs. A through hole for mold closing is provided on the bottle mouth half seat along the opening and closing direction. Select a bolt sleeve and pass one of the compression springs through the through holes for mold closing on the bottle mouth half seats on both sides, then put on the other compression spring and screw on the nut.
3. The cylindrical bottle injection blow molding device with core translation according to claim 2, characterized in that, The described bottle mouth half seat is provided with a spring placement hole that cooperates with the pressing spring and forms a stepped hole with a larger outer diameter and a smaller inner diameter facing the through hole for mold clamping on its outer side. The pressing spring is arranged in the spring placement hole of the corresponding bottle mouth half seat.
4. A cylindrical bottle injection blow molding device with a core translation type according to claim 1, characterized in that, The described demolding advancing and retracting driving device includes: a ejector rod arranged opposite to the demolding top plate. Reset pull rods are respectively arranged between the two sides of the demolding frame and the demolding top plate. A reset spring is sleeved on the reset pull rod, and the reset spring is arranged between the demolding top plate and the sliding support seat.
5. The cylindrical bottle injection and blow molding device with core translation according to claim 4, characterized in that, A ejector rod through hole corresponding to the ejector rod is provided on the moving mold base.
6. The cylindrical bottle injection blow molding device with core translation according to claim 4, characterized in that, Spring limit seats are respectively arranged on the two sides of the sliding support seat. A pull rod through hole that cooperates with the reset pull rod is provided on the spring limit seat. The reset pull rod is movably inserted through the pull rod through hole on the spring limit seat, and the upper end of the reset spring abuts against the spring limit seat.
7. A cylindrical bottle injection blow molding device with a core translation type according to claim 6, characterized in that, A spring placement hole that cooperates with the reset spring is provided on the bottom surface of the spring limit seat. The reset spring is arranged in the spring placement hole on the spring limit seat.
8. A cylindrical bottle injection blow molding device with core translation according to claim 6, characterized in that, Limit surfaces for defining the position of the sliding core seat after translation are arranged on the inner sides of the two side spring limit seats.
9. The cylindrical bottle injection and blowing molding device with core translation according to claim 1, characterized in that, The described mold moving driving device is a cylinder.
10. A core translation type cylindrical bottle injection blow molding device according to any one of claims 1 to 9, characterized in that, A guide post installation hole corresponding to the guide post is provided on the demolding frame. A guide sleeve is arranged in the guide post installation hole, and the guide post is movably arranged in the corresponding guide sleeve.