Demolding mechanism for spout external thread structure

Abstract

The utility model discloses a demoulding mechanism for an external thread structure of a spout, which is arranged on the side of a fixed mould and comprises a driving component and a demoulding component, the driving component provides power for the demoulding component and comprises a power group, a transmission group and a limit group, the power group is fixedly mounted on the fixed mould, the output end of the power group is connected with the transmission group, and the limit group is connected with the transmission group. The transmission group is in transmission connection to the demolding assembly; the limiting group is used for action limiting of the transmission group; the demolding assembly comprises an outer sleeve, an inner core rod and a guide set, the outer sleeve is coaxially arranged on the outer side of the inner core rod in a sleeving mode, a forming head is detachably installed at the lower end of the inner core rod, a spout forming cavity is defined by the forming head and the lower end of the outer sleeve, and the guide set is arranged on the outer side of the outer sleeve in a sleeving mode and used for guiding and driving the outer sleeve to move up and down. The injection mold is simple in structure, ingenious in design and small in occupied space, the overall size of the mold is reduced, the manufacturing cost is reduced, one-time injection molding and demolding of the plastic threaded pipe fitting can be achieved, and the working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mold technical field, concretely relates to a demoulding mechanism for spout outer thread structure. BACKGROUND

[0002] Injection molding refers to the processing of making a certain shape of semi-finished product by the operations of pressurizing, injecting, cooling and solidifying, and separating, etc. of completely molten raw materials, which is also called injection molding, and can be used for batch production of complex-shaped parts. The existing injection molding processing often involves the production and processing of products with structures such as bottle mouth and spout, which have corresponding external threads on the outer sidewall. The thread plastic mold applied is large, the processing operation steps are complicated, and the demolding method after injection molding is also relatively complex. The existing demolding method usually adopts chain transmission or selects a high-power motor or motor to provide power source to drive the thread insert to rotate, thereby realizing the demolding of the thread structure. However, its application range is small, the mold structure design is complex, it needs to be made large, occupies space, and wastes cost. SUMMARY

[0003] The utility model aims at solving the above-mentioned problems in the prior art, and provides a demoulding mechanism for spout outer thread structure.

[0004] To solve the above technical problems, the utility model adopts the technical scheme of a demoulding mechanism for spout outer thread structure, which is arranged on the fixed mold side and comprises a driving assembly and a demoulding assembly. The driving assembly provides power for the demoulding assembly and comprises a power assembly, a transmission assembly, and a limiting assembly. The power assembly is fixedly installed on the fixed mold, and its output end is connected with the transmission assembly. The transmission assembly is transmission-connected to the demoulding assembly, and the limiting assembly is used for limiting the action of the transmission assembly. The demoulding assembly comprises an outer sleeve, an inner core rod, and a guide assembly. The outer sleeve is coaxially sleeved on the outer side of the inner core rod. The lower end of the inner core rod is detachably installed with a forming head. The forming head and the lower end of the outer sleeve surround a spout forming cavity. The guide assembly is sleeved on the outer side of the outer sleeve and is used for guiding and driving the up-down movement of the outer sleeve.

[0005] Further, the power group in the driving assembly comprises a hydraulic oil cylinder which is fixed to the outer side wall of the fixed mold through a fixed support; the transmission group in the driving assembly comprises a transmission rack, corresponding guide blocks, an upper driving gear and a lower driving gear, one end of the transmission rack is fixedly connected with the outer end of the piston rod of the hydraulic oil cylinder through a T-shaped connecting block, the upper driving gear and the lower driving gear are coaxially fixedly connected and are rotatably installed on the fixed mold through a bearing, wherein the upper driving gear is engaged with the transmission rack; the limiting group in the driving assembly comprises a rear limiting block and a front limiting block, the rear limiting block is fixedly installed on the outer side of the output end of the hydraulic oil cylinder and is limitedly matched with the T-shaped connecting block to limit the retraction position, and the front limiting block is fixedly installed on the fixed mold and is located on the side of the transmission rack away from the upper driving gear and can also be limitedly matched with the T-shaped connecting block to limit the extension distance.

[0006] Further, the upper end surface of the fixed mold is provided with a mounting cavity, a pressing plate is fixedly installed on the upper end of the mounting cavity, and the inner core rod in the demolding assembly is fixedly installed on the pressing plate; the guide group in the demolding assembly comprises an upper guide sleeve and a lower guide sleeve, wherein the lower guide sleeve is fixedly installed in the fixed mold, the outer sleeve is slidably installed in the lower guide sleeve, and the upper guide sleeve is fixedly installed in the mounting cavity and is provided with an internal thread on the inner side surface thereof; the outer sleeve is sleeved on the outer side of the inner core rod, an external thread matched with the internal thread of the upper guide sleeve is arranged on the outer side wall of the upper end portion of the outer sleeve, a driven gear is coaxially fixed on the outer side wall of the upper half portion of the outer sleeve and is engaged with the lower driving gear, and an internal thread is arranged on the inner side wall of the lower end portion of the outer sleeve.

[0007] Further, the outer sleeve is threadedly matched with the upper guide sleeve, and the driven gear of the outer sleeve is engaged with the lower driving gear, so that the outer sleeve can move up and down while rotating.

[0008] Further, an external tooth is arranged on the outer side wall of the upper guide sleeve and surrounds the periphery thereof, and the upper guide sleeve is fixedly engaged in the mounting cavity of the fixed mold through the engagement of the tooth block.

[0009] Further, a travel switch and a corresponding travel stop rod are arranged in the driving assembly, the travel stop rod is fixedly installed on the T-shaped connecting block, extends in the opposite direction of the extension of the hydraulic oil cylinder and is parallel to the hydraulic oil cylinder, two contact rods are vertically fixed on the travel stop rod, and two travel switches are arranged and spaced apart from each other and are matched with the two contact rods to control the movement stroke of the transmission rack.

[0010] Further, the wheel diameter of the upper driving gear is smaller than the wheel diameter of the lower driving gear, and the upper driving gear and the lower driving gear are coaxially fixedly connected through a shaft and a key.

[0011] Further, guide grooves are arranged on the upper and lower side walls of the transmission rack along the length direction thereof, and two guide blocks are arranged, wherein the upper guide block is fixedly installed on the bottom of the pressing plate, and the lower guide block is fixedly installed on the fixed mold.

[0012] Compared with the prior art, the utility model has the advantages of simple structure, ingenious design, simplified mould structure, small occupied space, reduced overall size of the mould, reduced manufacturing cost, one-time injection molding and demolding of the plastic threaded pipe fitting, and improved work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 The product structure schematic diagram for the utility model structure;

[0014] Figure 2 The structure diagram for the utility model being applied to the fixed mould side;

[0015] Figure 3 The overall structure schematic diagram of the utility model;

[0016] Figure 4 The Figure 3 The longitudinal section view of the structure at the shaft center of the demolding assembly;

[0017] Figure 5 The structure diagram of the fixed mould in the utility model;

[0018] Figure 6 The assembly structure schematic diagram of the driving assembly and the demolding assembly in the utility model;

[0019] Figure 7 The structure diagram of the outer sleeve tube in the demolding assembly in the utility model;

[0020] Figure 8 The structure diagram of the upper guide sleeve in the demolding assembly in the utility model;

[0021] In the drawing: A0, spout structure, 1, fixed mould, 2, fixed support, 3, fixed seat, 4, hydraulic oil cylinder, 5, T-shaped joint block, 6, transmission rack, 7, upper driving gear, 8, lower driving gear, 9, demolding assembly, 10, travel switch, 11, gear installation cavity, 12, rack movable cavity, 13, upper guide sleeve installation cavity, 14, rear limiting block, 15, front limiting block, 16, upper guide block, 17, lower guide block, 18, pressing plate, 19, travel stop lever, 20, contact rod, 61, guide groove, 91, inner core rod, 92, outer sleeve tube, 93, upper guide sleeve, 94, lower guide sleeve, 95, forming head. DETAILED DESCRIPTION

[0022] It should be noted that in the description of this utility model, terms such as "upper", "lower", "left", "right", "front", "rear", "inner", "outer", "one end", "the other end", "coaxial", and "center" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are only used to facilitate the description of the structural relationship between the components in this utility model and do not specifically mean that any component in this utility model must have a specific orientation, be constructed and operated in a specific orientation, or be construed as a limitation on this utility model.

[0023] Furthermore, in utility models, descriptions such as "first" and "second" are for descriptive purposes only and do not specifically refer to any order or sequence, nor are they intended to limit the utility model. They are merely used to distinguish components or operations described with the same technical terms and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "setting," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings:

[0026] like Figures 2 to 6 As shown, a demolding mechanism for an external threaded structure of a spout is disposed on the fixed mold side, mainly for... Figure 1The molding and demolding of the external thread at A0 of the spout structure shown in the figure specifically includes a drive assembly and a demolding assembly 9, wherein the drive assembly provides power to the demolding assembly 9, driving the demolding assembly 9 to complete the demolding and separation of the external thread. The drive assembly includes a power unit, a transmission unit, and a limiting unit. The power unit includes a hydraulic cylinder 4, the transmission unit includes a transmission rack 6, an upper drive gear 7, and a lower drive gear 8, and the limiting unit includes a rear limiting block 14 and a front limiting block 15. Corresponding to the position of the drive assembly, the upper end face of the fixed mold 1 is provided with an embedded rack movable cavity 12. Gear mounting cavities 11 and upper guide sleeve mounting cavities 13 are respectively provided on both sides of the middle position of the rack movable cavity 12, and they are interconnected. A fully covered integrated pressure plate 18 is fixedly installed at the top of the gear mounting cavity 11 and the upper guide sleeve mounting cavity 13. One end of the rack movable cavity 12 extends outward to the outside of the fixed mold 1, and a coaxial fixed support 3 is fixedly installed on the outer wall of the fixed mold 1. The fixed support 3 is provided with a coaxial extension guide groove communicating with the rack movable cavity 12, and brass wear-resistant blocks are fixedly installed on the inner side wall of the extension guide groove. A fixed bracket 2 is bolted to the outer wall of the fixed mold 1. The hydraulic cylinder 4 is horizontally fixed inside the fixed bracket 2, and its piston rod extends into the rack movable cavity 12, coaxially arranged. One end of the transmission rack 6 is fixedly connected to the end of the piston rod in the hydraulic cylinder 4 through a T-shaped connector 5. The transmission rack 6 is horizontally arranged in the rack movable cavity 12, with its rack side facing the gear mounting cavity 11. Guide grooves 61 along its length are provided on both the upper and lower side walls of the transmission rack 6. Correspondingly, a lower guide block 17 with an inverted T-shaped cross section is fixedly installed in the bottom of the rack movable cavity 12. A T-shaped upper guide block 16 is bolted to the bottom surface of the pressure plate 18, which are adapted to the guide grooves 61 on the upper and lower sides of the transmission rack 6, so that the transmission rack 6 can be smoothly slidably installed in the rack movable cavity 12. The length of the rack movable cavity 12 is greater than the length of the transmission rack 6. The upper drive gear 7 and the lower drive gear 8 are coaxially fixed in sequence by a transmission shaft and a key. The diameter of the upper drive gear 7 is smaller than that of the lower drive gear 8. The upper drive gear 7 is rotatably mounted in the gear mounting cavity 11 of the fixed mold 1 by a bearing. The upper drive gear 7 meshes with the transmission rack 6.

[0027] The demolding assembly 9 includes an inner core rod 91, an outer sleeve 92, and a guide assembly. The upper end of the inner core rod 91 is fixedly mounted on the pressure plate 18, passes downward through a corresponding mounting through hole provided on the fixed mold 1, and its lower end is detachably mounted with a forming head 95. The outer sleeve 92 is coaxially fitted onto the outside of the inner core rod 91, also passing downward through a mounting through hole provided on the fixed mold 1, as shown in the figure. Figure 7As shown, the outer side wall of the upper end of the outer sleeve 92 is provided with external threads, and the outer side wall of the upper half of the outer sleeve 92 is fixedly installed with a coaxial driven gear, which is integrally formed with the outer sleeve 92. The upper and lower widths of the driven gear are the same as the upper and lower widths of the external threads arranged above the driven gear, and the driven gear is engaged with the lower driving gear 8. The inner side wall of the lower end of the outer sleeve 92 is provided with internal threads, which together with the forming head 95 forms a cavity. Figure 1 The forming cavity of the spout structure A0 shown in the middle facilitates the injection molding of the spout structure A0 and its external threads. The guide group includes an upper guide sleeve 93 and a lower guide sleeve 94. The upper guide sleeve 93 is fixedly installed inside the upper guide sleeve installation cavity 13, as shown in the reference Figure 8 As shown, the inner side wall of the upper guide sleeve 93 is provided with internal threads, which is coaxially sleeved on the upper end of the outer sleeve 92 and is threadedly connected with the external threads of the upper end of the outer sleeve 92. The thread engagement can drive the outer sleeve 92 to rotate and move up and down along the upper guide sleeve 93. The width of the upper guide sleeve 93 is less than the width of the external threads arranged on the upper end of the outer sleeve 92. The outer side wall of the upper guide sleeve 93 is provided with external teeth around its periphery. The upper guide sleeve 93 is fixedly installed in the corresponding upper guide sleeve installation cavity 13 through the engagement teeth blocks matched with the external teeth. The engagement position of the engagement teeth blocks on the external teeth of the upper guide sleeve 93 is adjusted to adapt to the different design heights of the rotary demolding of the external threads of the spout structure A0, i.e., the initial thread height. The lower guide sleeve 94 is fixedly installed inside the installation through hole of the fixed mold 1 through a pressing block, is sleeved on the lower half of the outer sleeve 92, and can slide relative to the outer sleeve 92.

[0028] The front limiting block 15 in the limiting group is fixedly installed on the side of the upper guide sleeve 93 through a countersunk head bolt, is located on the side close to the hydraulic oil cylinder 4, and can be limited and matched with the T-shaped block 5 to hard limit, limit the extension distance, and prevent the mold from being struck due to excessive power. The rear limiting block 14 in the limiting group is fixedly installed on the outer side of the piston rod end of the hydraulic oil cylinder 4 through a countersunk head bolt on the fixed support 3, and can block and limit the T-shaped block 5 to limit the retraction position.

[0029] The driving assembly is also provided with a travel switch 10 and a corresponding travel stop rod 19. The travel switch 10 is provided with two travel switches 10, which are spaced apart from each other and are installed on the outer end of the fixed support 3 away from the fixed mold 1 and the inner end of the fixed support 3 close to the fixed mold 1. The distance between the two travel switches 10 is the distance for driving the outer sleeve 92 to separate from the spout structure A0. The travel stop rod 19 is fixedly installed on the T-shaped block 5, extends in the opposite direction of the extension of the piston rod of the hydraulic oil cylinder 4, and is parallel to the piston rod. Two contact rods 20 are vertically fixed on the travel stop rod 19, correspond to the two travel switches 10, and are in touch with the travel switches 10 to limit the extension length of the transmission rack 6.

[0030] The forming head 95 can be provided with various specifications and models according to actual production needs, so as to form different spout structures with the lower end of the outer sleeve 92.

[0031] The specific use principle is as follows: when the product is demolded after forming, first, the hydraulic oil cylinder 4 is actuated, the piston rod thereof extends outward, drives the transmission rack 6 to extend in the rack movable cavity 12, and through the engagement of the rack teeth thereof with the upper drive gear 7 and the coaxial fixed connection, drives the lower drive gear 8 to rotate. Since the lower drive gear 8 is engaged with the driven gear on the outer sleeve 92, the outer sleeve 92 is driven to rotate, and then the outer thread provided on the upper end of the outer sleeve 92 is engaged with the inner thread of the upper guide sleeve 93, and then the outer sleeve 92 is driven to rotate and move upward, so that the inner thread of the lower end of the outer sleeve 92 is demolded and separated from the outer thread at the spout structure A0. At this time, the inner core rod 91 is stationary, the forming head 95 at the lower end thereof abuts against the spout structure A0, and effective demolding is completed.

[0032] A set of injection molds can be provided with two groups of the same structure, which are arranged in a central symmetric structure. The related technical features not described or involved in the above technical solution can be realized by adopting or referring to the related technical solutions in the prior art.

[0033] Of course, the above description is not a limitation of the present application, and the present application is not limited to the above examples. Changes, modifications, additions or replacements made by the person skilled in the art within the essential scope of the present application should also be within the protection scope of the present application.

Claims

1. A demolding mechanism for a spout outer thread structure, arranged on the fixed mold side, characterized in that: The application relates to a driving assembly and a demolding assembly, wherein the driving assembly provides power for the demolding assembly, the driving assembly comprises a power group, a transmission group and a limiting group, the power group is fixedly installed on a fixed mold, the output end of the power group is connected with the transmission group, the transmission group is transmissionally connected to the demolding assembly, and the limiting group is used for limiting the action of the transmission group; the demolding assembly comprises an outer sleeve, an inner core rod and a guide group, the outer sleeve is coaxially sleeved on the outer side of the inner core rod, the lower end of the inner core rod is detachably installed with a forming head, the forming head and the lower end of the outer sleeve surround a spout forming cavity, the guide group is sleeved on the outer side of the outer sleeve and is used for guiding and driving the up-down movement of the outer sleeve.

2. A demolding mechanism for spout outer thread structure according to claim 1, characterized in that: The power group in the driving assembly comprises a hydraulic oil cylinder which is fixedly arranged on the outer side wall of the fixed mold through a fixed support; the transmission group in the driving assembly comprises a transmission rack, corresponding guide blocks, an upper driving gear and a lower driving gear, one end of the transmission rack is fixedly connected with the outer end of the piston rod of the hydraulic oil cylinder through a T-shaped connecting block, the upper driving gear and the lower driving gear are coaxially fixedly connected and are rotatably arranged on the fixed mold through a bearing, wherein the upper driving gear is engaged with the transmission rack; the limiting group in the driving assembly comprises a rear limiting block and a front limiting block, the rear limiting block is fixedly installed on the outer side of the output end of the hydraulic oil cylinder and is limitedly matched with the T-shaped connecting block to limit the retraction position, and the front limiting block is fixedly installed on the fixed mold and is located on the side of the transmission rack away from the upper driving gear and can also be limitedly matched with the T-shaped connecting block to limit the extension distance.

3. A demolding mechanism for spout outer thread structure according to claim 2, characterized in that: The upper end surface of the fixed mold is provided with a mounting cavity, a pressing plate is fixedly installed on the upper end of the mounting cavity, and the inner core rod in the demolding assembly is fixedly installed on the pressing plate; the guide group in the demolding assembly comprises an upper guide sleeve and a lower guide sleeve, the lower guide sleeve is fixedly installed in the fixed mold, the outer sleeve is slidably installed in the lower guide sleeve, and the upper guide sleeve is fixedly installed in the mounting cavity and is provided with an internal thread on the inner side surface; the outer sleeve in the demolding assembly is sleeved on the outer side of the inner core rod, an external thread matched with the internal thread of the upper guide sleeve is arranged on the outer side wall of the upper end portion of the outer sleeve, a driven gear is coaxially fixedly arranged on the outer side wall of the upper half portion of the outer sleeve and is engaged with the lower driving gear, and an internal thread is arranged on the inner side wall of the lower end portion of the outer sleeve.

4. A demolding mechanism for spout outer thread structure according to claim 3, characterized in that: The external thread matching between the outer sleeve and the upper guide sleeve and the engagement between the driven gear on the outer sleeve and the lower driving gear enable the outer sleeve to move up and down while rotating.

5. A demolding mechanism for spout outer thread structure according to claim 3, characterized in that: An external tooth is arranged on the outer side wall of the upper guide sleeve and surrounds the periphery of the upper guide sleeve, and the upper guide sleeve is fixedly engaged in the mounting cavity of the fixed mold through the engagement of the external tooth and a tooth block.

6. A demolding mechanism for spout outer thread structure according to claim 2, characterized in that: A stroke switch and a corresponding stroke stop rod are further arranged in the driving assembly, the stroke stop rod is fixedly installed on the T-shaped connecting block, extends in the opposite direction of the extension direction of the hydraulic oil cylinder and is parallel to the hydraulic oil cylinder, two contact rods are vertically fixed on the stroke stop rod, two stroke switches are arranged and are spaced from each other, are matched with the two contact rods respectively and control the movement stroke of the transmission rack.

7. A demolding mechanism for spout outer thread structure according to claim 2, characterized in that: The wheel diameter of the upper driving gear is smaller than the wheel diameter of the lower driving gear, and the upper driving gear and the lower driving gear are coaxially fixedly connected through a shaft and a key.

8. A demolding mechanism for spout outer thread structure according to claim 3, characterized in that: The upper and lower sidewalls of the transmission rack are provided with guide grooves along the length direction, and the guide blocks are provided with two, wherein the upper guide block is fixedly installed on the bottom of the pressing plate, and the lower guide block is fixedly installed on the fixed mold.

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