Threaded opening PET bottle blank injection mold with efficient demolding mechanism

Abstract

The utility model provides a threaded opening PET bottle blank injection mold with an efficient demolding mechanism, and belongs to the technical field of molds. The bottle blank forming device comprises an upper die plate and a lower die plate, a lifting plate is arranged between the upper die plate and the lower die plate, and two bottle blank forming assemblies are arranged on the upper side of the lifting plate. The bottle blank forming assembly comprises an upper forming block with an upper die cavity, a lower forming block with a lower die cavity, a core die inserted into the upper die cavity and the lower die cavity from bottom to top, and a separated lip die structure arranged between the upper forming block and the lower forming block. The bottle blank forming assembly composed of the upper forming block, the lower forming block, the core mold and the separated lip mold structure can be used for injection molding of a bottle blank product, and the lifting plate can be matched with the guide type lip mold separation assembly to drive the separated lip mold structure to move upwards to eject the product and can drive the separated lip mold structure to move horizontally to pull a core at the same time when moving upwards. According to the structure, ejection and core pulling actions can be realized by only adopting one group of power components, so that the mold cost can be effectively reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds and relates to a threaded-mouth PET bottle blank injection mold with a high-efficiency demoulding mechanism. Background Art

[0002] When injecting a threaded-mouth PET bottle blank, it is necessary to move the lip mold at the threaded mouth position horizontally while ejecting the product so that the thread groove on the lip mold is separated from the thread on the product. In the prior art, the mold needs to be provided with an ejection mechanism and a translation core pulling mechanism, and the mold requires more power components and is more expensive.

[0003] For example, a Chinese patent discloses a combined mold lip of a preform mold and a preform mold [application number: 202311630512.1], comprising two mirror-symmetrical half-mold lip components, wherein the half-mold lip components include a half-mold lip base and a half-mold lip insert fixed to the half-mold lip base, and the half-mold lip insert and the half-mold lip base are configured to define the molding surface of the half-mold lip component; the preform mold comprises at least one molding component, wherein the molding component comprises a mold core, a mold cavity and a mold lip that define at least part of the preform molding, and the mold lip is a combined mold lip. Utility Model Content

[0004] The utility model aims to solve the above problems and provides a screw-mouth PET bottle blank injection mold with an efficient demoulding mechanism.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A threaded-mouth PET preform injection mold with an efficient demoulding mechanism comprises an upper mold plate and a lower mold plate, a lifting plate is arranged between the upper mold plate and the lower mold plate, two groups of preform molding components are arranged on the upper side of the lifting plate, the preform molding components comprise an upper molding block with an upper mold cavity, a lower molding block with a lower mold cavity, a core mold inserted into the upper mold cavity and the lower mold cavity from bottom to top, and a separate lip mold structure arranged between the upper molding block and the lower molding block, and two guide lip mold separation components are also arranged on the lifting plate and are respectively connected to the separate lip mold structures in the two groups of preform molding components.

[0007] In the above-mentioned threaded-mouth PET bottle blank injection mold with an efficient demoulding mechanism, the separate lip mold structure includes two half-lip molds with semi-circular cross-sections that can form an annular lip mold, and an external thread molding structure is arranged on the inner circumferential surface of the annular lip mold.

[0008] In the above-mentioned threaded-mouth PET bottle blank injection mold with an efficient demolding mechanism, the guided lip mold separation assembly includes a left separation plate and a right separation plate arranged on a lifting plate through a sliding limit structure, and the two half lip molds are respectively connected to the left separation plate and the right separation plate. The two left separation plates in the two guided lip mold separation assemblies are connected through a linkage structure, and the two right separation plates in the two guided lip mold separation assemblies are also connected through a linkage structure. The left and right sides of the lower mold are respectively provided with translation guide structures connected to the left separation plate and the right separation plate.

[0009] In the above-mentioned threaded-mouth PET preform injection mold with an efficient demoulding mechanism, the linkage structure includes horizontally arranged linkage rods, two linkage rods are fixed between the two left separation plates, and two linkage rods are also fixed between the two right separation plates.

[0010] In the above-mentioned threaded-mouth PET bottle blank injection mold with an efficient demolding mechanism, the translation guide structure includes two guide blocks fixed on the left and right sides of the lower template, and the guide blocks are provided with guide grooves with a translation section in the middle part inclined toward the side away from the lower template. The left separation plate and the right separation plate located on the outside are respectively provided with a left guide slider and a right guide slider, and the left guide slider is inserted into the guide groove of the guide block located on the left side of the lower template, and the right guide slider is inserted into the guide groove of the guide block located on the right side of the lower template.

[0011] In the above-mentioned threaded-mouth PET bottle preform injection mold with an efficient demolding mechanism, the sliding limiting structure includes limiting pressure plates arranged on both sides of the lifting plate, a limiting slide groove is arranged at the inner bottom of the limiting pressure plate, and limiting sliding blocks inserted into the limiting slide grooves are protruding on both sides of the left separation plate and the right separation plate.

[0012] In the above-mentioned threaded-mouth PET bottle blank injection mold with a high-efficiency demoulding mechanism, the external thread molding structure includes a thread molding groove that is inwardly recessed and arranged on the inner circumferential surface of the annular lip mold.

[0013] In the above-mentioned threaded-mouth PET preform injection mold with a high-efficiency demoulding mechanism, the upper molding block is detachably fixed to the upper mold plate by a plurality of screws.

[0014] In the above-mentioned threaded-mouth PET preform injection mold with a high-efficiency demoulding mechanism, the half-lip mold is detachably fixed to the left separation plate or the right separation plate by a plurality of screws.

[0015] In the above-mentioned threaded-mouth PET preform injection mold with a high-efficiency demoulding mechanism, the lower molding block is detachably fixed on the lifting plate by a plurality of screws.

[0016] Compared with the existing technology, the advantages of the utility model are:

[0017] 1. The preform molding assembly consisting of the upper molding block, the lower molding block, the core mold and the separate lip mold structure can be used for injection molding preform products. When the lifting plate moves upward, it can cooperate with the guide lip mold separation assembly to drive the separate lip mold structure to move upward to eject the product and can also drive the separate lip mold structure to translate and pull the core at the same time. The above structure can realize the ejection and core pulling actions using only one set of power components, which can effectively reduce the mold cost.

[0018] 2. When the lifting plate moves upward, the two left separation plates and the two right separation plates linked by the linkage structure can be translated to the left and right respectively under the action of the translation guide structure. While ejecting the product, the contact between the annular lip mold and the external thread on the product is used to eject the product for a distance, so that the product and the mold core are separated.

[0019] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the external structure of the utility model;

[0021] Figure 2 It is a cross-sectional view of the utility model;

[0022] Figure 3 It is a partial structural schematic diagram of the utility model;

[0023] Figure 4 It is a partial structural schematic diagram of the bottle blank molding component.

[0024] In the figure, an upper template 1, a lower template 2, a lifting plate 3, a preform molding assembly 4, an upper molding block 5, a lower molding block 6, a core mold 7, a separate lip mold structure 8, a guide lip mold separation assembly 9, a half lip mold 10, a left separation plate 11, a right separation plate 12, a linkage rod 13, a guide block 14, a translation section 15, a guide slot 16, a left guide slider 17, a right guide slider 18, a limiting pressure plate 19, a limiting slot 20, and a limiting slider 21. DETAILED DESCRIPTION

[0025] like Figure 1-Figure 4As shown, a threaded-mouth PET preform injection mold with an efficient demoulding mechanism comprises an upper mold plate 1 and a lower mold plate 2, a lifting plate 3 is arranged between the upper mold plate 1 and the lower mold plate 2, two groups of preform molding components 4 are arranged on the upper side of the lifting plate 3, the preform molding components 4 comprise an upper molding block 5 with an upper mold cavity, a lower molding block 6 with a lower mold cavity, a core mold 7 inserted into the upper mold cavity and the lower mold cavity from bottom to top, and a separate lip mold structure 8 arranged between the upper molding block 5 and the lower molding block 6, and two guided lip mold separation components 9 are also arranged on the lifting plate 3, which are respectively connected to the separate lip mold structures 8 in the two groups of preform molding components 4.

[0026] In the utility model, the bottle blank molding assembly 4 composed of the upper molding block 5, the lower molding block 6, the core mold 7 and the separate lip mold structure 8 can be used for injection molding bottle blank products. When the lifting plate moves upward, it can cooperate with the guided lip mold separation assembly 9 to drive the separate lip mold structure to move upward to eject the product and can also drive the separate lip mold structure to translate and pull the core at the same time. The above structure can realize the ejection and core pulling actions using only one set of power components, which can effectively reduce the mold cost.

[0027] Specifically, the split lip mold structure 8 includes two half lip molds 10 with semi-circular cross sections that can form an annular lip mold, and an external thread forming structure is provided on the inner circumferential surface of the annular lip mold. The external thread forming structure on the annular lip mold can form an external thread at the bottle mouth of the bottle blank during product injection molding. The annular lip mold is composed of two half lip molds and can move horizontally during demoulding to separate the external threads of the annular lip mold and the product.

[0028] Specifically, the guided lip mold separation assembly 9 includes two left separation plates 11 and right separation plates 12 arranged on the lifting plate 3 through a sliding limit structure, two half lip molds 10 are connected to the left separation plates 11 and the right separation plates 12 respectively, the two left separation plates 11 in the two guided lip mold separation assemblies 9 are connected through a linkage structure, and the two right separation plates 12 in the two guided lip mold separation assemblies 9 are also connected through a linkage structure, and the left and right sides of the lower mold plate 2 are respectively provided with translation guide structures connected to the left and right separation plates 11 and 12. When the lifting plate moves upward, the two left separation plates and the two right separation plates linked by the linkage structure can be translated to the left and right respectively under the action of the translation guide structure, and while ejecting the product, the contact between the annular lip mold and the external thread on the product is used to eject the product for a distance, so that the product and the mold core are separated.

[0029] Specifically, the linkage structure includes a horizontally arranged linkage rod 13, two linkage rods 13 are fixed between the two left separation plates 11, and two linkage rods 13 are also fixed between the two right separation plates 12. The linkage rods can ensure that the two left separation plates and the two right separation plates can move synchronously.

[0030] Specifically, the translation guide structure includes two guide blocks 14 fixed on the left and right sides of the lower template 2, and the guide blocks 14 are provided with a guide groove 16 with a translation section 15 in the middle part inclined toward the side away from the lower template 2. The left separation plate 11 and the right separation plate 12 located on the outside are respectively provided with a left guide slider 17 and a right guide slider 18. The left guide slider 17 is inserted into the guide groove 16 of the guide block 14 located on the left side of the lower template 2, and the right guide slider 18 is inserted into the guide groove 16 of the guide block 14 located on the right side of the lower template 2. When the lifting plate moves upward, it can drive the left separation plate and the right separation plate to move upward. When the left separation plate and the right separation plate move upward, they can drive the two half-lip molds respectively arranged on the left separation plate and the right separation plate to move upward. When the half-lip mold moves upward, the product can be lifted up and separated from the mold core through the contact between the annular lip mold and the external thread on the product. When the left separation plate and the right separation plate move upward until the left guide slider 17 and the right guide slider 18 move on the translation section, the left separation plate and the right separation plate can translate to the left and right respectively, thereby realizing the translation core pulling of the half-lip mold and separating the external thread on the product from the annular lip mold.

[0031] Specifically, the sliding limit structure includes a limit pressing plate 19 arranged on both sides of the lifting plate 3, a limit sliding groove 20 is arranged on the inner bottom of the limit pressing plate 19, and a limit sliding block 21 is protruded on both sides of the left separation plate 11 and the right separation plate 12 and inserted into the limit sliding groove 20. The left separation plate 11 and the right separation plate 12 can be limited up and down by the limit sliding groove on the limit pressing plate and the limit sliding block.

[0032] Specifically, the external thread forming structure includes a thread forming groove which is recessed inwardly and arranged on the inner circumferential surface of the annular lip mold. The thread forming groove can form an external thread at the bottle mouth of the bottle blank during product injection molding.

[0033] Preferably, the upper forming block 5 is detachably fixed to the upper mold plate 1 by a plurality of screws. The detachable arrangement can reduce the replacement cost when the upper forming block 5 is damaged.

[0034] Preferably, the half lip mold 10 is detachably fixed to the left separation plate 11 or the right separation plate 12 by a plurality of screws. The detachable setting can reduce the replacement cost when the half lip mold 10 is damaged.

[0035] Preferably, the lower forming block 6 is detachably fixed to the lifting plate 3 by a plurality of screws. The detachable arrangement can reduce the replacement cost of the lower forming block 6 when it is damaged.

[0036] The working principle of the utility model is as follows: the preform forming assembly 4 composed of the upper forming block 5, the lower forming block 6, the core mold 7 and the separate lip mold structure 8 can be used for injection molding of preform products, and the lifting plate can cooperate with the guide lip mold separation assembly 9 to drive the separate lip mold structure to move upward to eject the product and can also drive the separate lip mold structure to translate and pull the core at the same time. The above structure can realize the ejection and core pulling actions with only one set of power components, which can effectively reduce the mold cost;

[0037] The external thread forming structure on the annular lip mold can form an external thread at the mouth of the bottle blank during product injection molding. The annular lip mold consists of two half lip molds and can move horizontally during demoulding to separate the annular lip mold and the external thread of the product. The thread forming groove can form an external thread at the mouth of the bottle blank during product injection molding.

[0038] When the lifting plate moves upward, the two left separation plates and the two right separation plates linked by the linkage structure can be translated to the left and right respectively under the action of the translation guide structure. While ejecting the product, the contact between the annular lip mold and the external thread on the product is used to eject the product for a distance, so that the product and the mold core are separated. The linkage rod can ensure that the two left separation plates and the two right separation plates can move synchronously. When the lifting plate moves upward, it can drive the left and right separation plates to move upward. When the left and right separation plates move upward, they can drive the two plates respectively set on the left separation plate. The half lip mold on the right separation plate moves upward. When the half lip mold moves upward, the product can be lifted up through the contact between the annular lip mold and the external thread on the product to separate the product from the mold core. When the left and right separation plates move upward to the left guide slider 17 and the right guide slider 18 move on the translation section, the left and right separation plates can be translated to the left and right respectively to realize the translation core pulling of the half lip mold, so that the external thread on the product is separated from the annular lip mold. The left separation plate 11 and the right separation plate 12 can be limited up and down by the limiting slide groove on the limiting pressure plate and the limiting slider;

[0039] The detachable setting can reduce the replacement cost of the upper molding block 5 when it is damaged, the detachable setting can reduce the replacement cost of the half lip mold 10 when it is damaged, and the detachable setting can reduce the replacement cost of the lower molding block 6 when it is damaged.

[0040] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0041] Although this article uses the upper template 1, the lower template 2, the lifting plate 3, the bottle blank molding assembly 4, the upper molding block 5, the lower molding block 6, the core mold 7, the separate lip mold structure 8, the guide lip mold separation assembly 9, the half lip mold 10, the left separation plate 11, the right separation plate 12, the linkage rod 13, the guide block 14, the translation section 15, the guide slot 16, the left guide slider 17, the right guide slider 18, the limit pressure plate 19, the limit slot 20, the limit slider 21, etc. more frequently, these terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A threaded PET preform injection mold with an efficient demoulding mechanism, comprising an upper mold plate (1) and a lower mold plate (2), characterized in that: A lifting plate (3) is arranged between the upper mold plate (1) and the lower mold plate (2), and two groups of bottle blank molding components (4) are arranged on the upper side of the lifting plate (3). The bottle blank molding components (4) include an upper molding block (5) having an upper mold cavity, a lower molding block (6) having a lower mold cavity, a core mold (7) inserted into the upper mold cavity and the lower mold cavity from bottom to top, and a separate lip mold structure (8) arranged between the upper molding block (5) and the lower molding block (6). The lifting plate (3) is also provided with two guide lip mold separation components (9) respectively connected to the separate lip mold structures (8) in the two groups of bottle blank molding components (4).

2. The threaded-mouth PET preform injection mold with an efficient demoulding mechanism according to claim 1, characterized in that: The split lip mold structure (8) comprises two half lip molds (10) with semi-circular cross-sections that can form an annular lip mold, and an external thread molding structure is arranged on the inner circumferential surface of the annular lip mold.

3. The threaded-mouth PET preform injection mold with an efficient demoulding mechanism according to claim 2, characterized in that: The guided lip mold separation component (9) comprises a left separation plate (11) and a right separation plate (12) which are arranged on the lifting plate (3) through a sliding limit structure. The two half lip molds (10) are respectively connected to the left separation plate (11) and the right separation plate (12). The two left separation plates (11) in the two guided lip mold separation components (9) are connected through a linkage structure. The two right separation plates (12) in the two guided lip mold separation components (9) are also connected through a linkage structure. The left and right sides of the lower mold plate (2) are respectively provided with translation guide structures connected to the left separation plate (11) and the right separation plate (12).

4. The threaded-mouth PET preform injection mold with an efficient demoulding mechanism according to claim 3, characterized in that: The linkage structure comprises a linkage rod (13) arranged horizontally, wherein two linkage rods (13) are fixed between the two left separation plates (11), and two linkage rods (13) are also fixed between the two right separation plates (12).

5. The threaded-mouth PET preform injection mold with an efficient demoulding mechanism according to claim 4, characterized in that: The translation guide structure comprises two guide blocks (14) fixed on the left and right sides of the lower template (2); the guide block (14) is provided with a guide groove (16) having a translation section (15) in the middle part inclined away from the lower template (2); a left guide slider (17) and a right guide slider (18) are respectively provided on the left separation plate (11) and the right separation plate (12) located on the outside; the left guide slider (17) is inserted into the guide groove (16) of the guide block (14) located on the left side of the lower template (2); and the right guide slider (18) is inserted into the guide groove (16) of the guide block (14) located on the right side of the lower template (2).

6. The threaded-mouth PET preform injection mold with an efficient demoulding mechanism according to claim 5, characterized in that: The sliding limiting structure comprises limiting pressure plates (19) arranged on both sides of the lifting plate (3), a limiting slide groove (20) is arranged at the inner bottom of the limiting pressure plate (19), and limiting sliding blocks (21) are protruding on both sides of the left separation plate (11) and the right separation plate (12) and inserted into the limiting slide groove (20).

7. The threaded-mouth PET preform injection mold with an efficient demoulding mechanism according to claim 2, characterized in that: The external thread forming structure comprises a thread forming groove which is recessed inwardly and arranged on the inner circumferential surface of the annular lip die.

8. The threaded-mouth PET preform injection mold with an efficient demoulding mechanism according to claim 6, characterized in that: The upper forming block (5) is detachably fixed to the upper mold plate (1) by means of a plurality of screws.

9. The threaded-mouth PET preform injection mold with an efficient demoulding mechanism according to claim 6, characterized in that: The half lip mold (10) is detachably fixed on the left separation plate (11) or the right separation plate (12) by a plurality of screws.

10. The threaded-mouth PET preform injection mold with an efficient demoulding mechanism according to claim 6, characterized in that: The lower forming block (6) is detachably fixed on the lifting plate (3) by means of a plurality of screws.

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