Injection mold structure for adding soft rubber into hard rubber product for injection molding

Abstract

The utility model discloses an injection mold structure for adding soft rubber into a hard rubber product for injection molding, which relates to the technical field of injection molds and comprises a mold mechanism, a mold tightening mechanism is arranged at the bottom of the mold mechanism and is used for tightening mold closing, and the mold tightening mechanism comprises a clamping and pressing unit arranged at the bottom of the mold mechanism and comprising a base and a connecting seat, a lead screw is rotationally installed at the top of the base, and a linkage disc is rotationally installed on the surface of the lead screw in a threaded mode. According to the driving unit, a die tightening mechanism is arranged, a motor runs to drive a worm to rotate, the worm drives a worm gear to rotate, the worm gear drives a lead screw to rotate, the lead screw drives a linkage disc to descend, the linkage disc drives a linkage rod to synchronously move, the linkage rod enables a linkage column to slide in a linkage groove through the linkage groove, and a clamping rod is driven to slide in a connecting base; and the four edges of the top of the upper die are pressed downwards through the upper ends of the clamping rods, so that the upper die and the lower die are tightly combined, and trimming of a finished product is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, and particularly to an injection mold structure for adding soft glue injection molding to hard glue products. Background Technique

[0002] An injection mold for adding soft glue injection molding to hard glue products is usually called a two-color injection mold or a hard-soft glue injection mold. This kind of mold is designed to coat a relatively thin layer of soft plastic (such as TPE, TPU, etc.) on the surface of hard plastics (such as PP, PS, ABS, PC, PA, etc.) through the injection process, so as to realize the composite injection molding of hard and soft materials.

[0003] It is found that the publication number: CN221540496U discloses an injection mold for soft glue injection molding of hard glue products, which includes a mold base assembly, a mold core assembly, an ejection assembly, a gating system and a cooling system. A cavity is formed inside the mold core assembly. The gating system is used to inject plastic hot flow of soft glue material into the cavity, and the cooling system is used to cool the soft glue product. The ejection assembly is used to eject the product after the mold base assembly and the mold core assembly are separated; a pre-injected hard glue product is placed in the cavity. The mold core assembly is provided with positioning columns, which are fixedly connected to the mold core assembly and form support and limitation for the pre-placed hard glue product, so that it can maintain an accurate position in the cavity. To sum up, it can reduce the influence of the hard glue product on the soft glue product during the injection process, make the hard glue product accurately positioned, avoid displacement and deformation, and thus improve the yield rate of the product.

[0004] Based on the above-mentioned existing technology, the current existing injection mold structure for adding soft glue injection molding to hard glue products still has the following problems. During the use of the existing mold, if the joint between the upper mold and the lower mold is not properly handled, it will cause flash on the finished product. Therefore, the utility model provides an injection mold structure for adding soft glue injection molding to hard glue products. Content of the Utility Model

[0005] In view of the deficiencies of the prior art, the utility model provides an injection mold structure for adding soft glue injection molding to hard glue products, and solves the following problems existing in the existing injection mold structure for adding soft glue injection molding to hard glue products. During the use of the existing mold, if the joint between the upper mold and the lower mold is not properly handled, it will cause flash on the finished product.

[0006] To achieve the above purposes, the utility model is realized through the following technical solutions: an injection mold structure for adding soft glue injection molding to hard glue products, including a mold mechanism, and a mold clamping mechanism is arranged at the bottom of the mold mechanism for making the mold clamping tight. The mold clamping mechanism includes:

[0007] The clamping unit is arranged at the bottom of the mold mechanism and includes a base and a connecting seat. A lead screw is rotatably installed on the top of the base. A linkage disk is threadedly and rotatably installed on the surface of the lead screw. Linkage rods are fixedly installed at the four ends of the linkage disk. A clamping rod is rotatably installed inside the connecting seat, and a linkage column is fixedly installed at one end of the clamping rod.

[0008] The driving unit is arranged above the base and is used to provide kinetic energy.

[0009] Preferably, a linkage groove is formed inside the linkage rod, and the linkage column is slidably fitted inside the linkage groove.

[0010] Preferably, the driving unit includes a motor fixedly installed on the top of the base. A worm is fixedly installed at the output end of the motor. A fixed seat is fixedly installed on the top of the base, and one end of the worm is rotatably installed inside the fixed seat.

[0011] Preferably, a worm gear is fixedly installed on the surface of the lead screw, and the worm gear is meshed with the worm.

[0012] Preferably, the mold mechanism includes an upper mold. Two upper air flow holes are formed inside the upper mold. An upper air inlet joint is fixedly installed on the right side of the upper mold. The upper air inlet joint is connected to the upper air flow holes. An upper circulation pipe is fixedly installed on the left side of the upper mold. The upper circulation pipe is connected to the upper air flow holes.

[0013] Preferably, the mold mechanism further includes a lower mold, and the lower mold is combined with the upper mold. Two lower air flow holes are formed inside the lower mold. A lower air inlet joint is fixedly installed on the right side of the lower mold, and the lower air inlet joint is connected to the lower air flow holes. A lower circulation pipe is fixedly installed on the left side of the lower mold, and the lower circulation pipe is connected to the lower air flow holes. An injection pipe is fixedly installed on the right side of the lower mold. A demolding assembly is fixedly installed at the bottom of the lower mold.

[0014] The utility model provides an injection mold structure for adding soft glue injection into a hard glue product. Compared with the prior art, the following beneficial effects are achieved:

[0015] (1). In the injection mold structure for adding soft glue injection into a hard glue product, by arranging a mold clamping mechanism, when the motor runs, the worm is driven to rotate. The worm drives the worm gear to rotate. The worm gear drives the lead screw to rotate. The lead screw drives the linkage disk to descend. The linkage disk drives the linkage rods to move synchronously. The linkage rods enable the linkage column to slide inside them through the linkage groove, driving the clamping rod to slide inside the connecting seat. The upper end of the clamping rod presses down on the four sides of the top of the upper mold, so that the combination between the upper mold and the lower mold is tight, thereby avoiding flash on the finished product.

[0016] (2) The injection mold structure for adding soft rubber injection into hard rubber products. By setting up a mold mechanism, upper air holes and lower air holes are respectively opened inside the upper mold and the lower flow air holes. Through two upper air inlet connectors, an upper circulation pipe, two lower air inlet connectors and a lower circulation pipe, the constant-temperature air flows inside the upper air holes and the lower air holes, thereby controlling the temperatures of the upper mold and the lower mold and improving the injection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a right-side perspective structural view of the present utility model;

[0018] Figure 2 is a sectional perspective structural view of the present utility model;

[0019] Figure 3 is a bottom-side perspective structural view of the present utility model;

[0020] Figure 4 is a rear-side perspective structural view of the present utility model.

[0021] In the figures: 1 - mold mechanism, 11 - upper mold, 12 - upper air hole, 13 - upper air inlet connector, 14 - upper circulation pipe, 15 - lower mold, 16 - lower air hole, 17 - lower air inlet connector, 18 - lower circulation pipe, 19 - injection pipe, 110 - demolding assembly, 2 - mold clamping mechanism, 21 - clamping unit, 211 - base, 212 - lead screw, 213 - linkage disk, 214 - linkage rod, 215 - linkage groove, 216 - connecting seat, 217 - clamping rod, 218 - linkage column, 219 - worm gear, 22 - driving unit, 221 - motor, 222 - worm, 223 - fixed seat. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] Please refer to Figures 1 - 4 , the present utility model provides a technical solution:

[0024] An injection mold structure for adding soft rubber injection into hard rubber products, including a mold mechanism 1. A mold clamping mechanism 2 is arranged at the bottom of the mold mechanism 1 for making the mold closing tight. The mold clamping mechanism 2 includes:

[0025] The clamping unit 21 is arranged at the bottom of the mold mechanism 1 and includes a base 211 and a connecting seat 216. A lead screw 212 is rotatably installed on the top of the base 211. A linkage disk 213 is threadedly and rotatably installed on the surface of the lead screw 212. Linkage rods 214 are fixedly installed at the four ends of the linkage disk 213. A clamping rod 217 is rotatably installed inside the connecting seat 216, and a linkage column 218 is fixedly installed at one end of the clamping rod 217;

[0026] The driving unit 22 is arranged above the base 211 and is used to provide kinetic energy.

[0027] In this embodiment, a linkage groove 215 is formed inside the linkage rod 214, and the linkage column 218 is slidably fitted inside the linkage groove 215.

[0028] In this embodiment, the driving unit 22 includes a motor 221 fixedly installed on the top of the base 211. A worm 222 is fixedly installed at the output end of the motor 221. A fixed seat 223 is fixedly installed on the top of the base 211, and one end of the worm 222 is rotatably installed inside the fixed seat 223.

[0029] In this embodiment, a worm gear 219 is fixedly installed on the surface of the lead screw 212, and the worm gear 219 is meshed and installed with the worm 222.

[0030] When the motor 221 operates, it drives the worm 222 to rotate. The worm 222 drives the worm gear 219 to rotate. The worm gear 219 drives the lead screw 212 to rotate. The lead screw 212 drives the linkage disk 213 to descend. The linkage disk 213 drives the linkage rods 214 to move synchronously. The linkage rods 214 cause the linkage column 218 to slide inside it through the linkage groove 215, driving the clamping rod 217 to slide inside the connecting seat 216. The upper end of the clamping rod 217 presses down on the four sides of the top of the upper mold 11, so that the upper mold 11 and the lower mold 15 fit tightly together, thus avoiding flash on the finished product.

[0031] In this embodiment, the mold mechanism 1 includes an upper mold 11. Two upper air flow holes 12 are formed inside the upper mold 11. An upper air inlet joint 13 is fixedly installed on the right side of the upper mold 11. The upper air inlet joint 13 is connected to the upper air flow holes 12. An upper circulation pipe 14 is fixedly installed on the left side of the upper mold 11. The upper circulation pipe 14 is connected to the upper air flow holes 12. The mold mechanism 1 further includes a lower mold 15, and the lower mold 15 fits with the upper mold 11. Two lower air flow holes 16 are formed inside the lower mold 15. A lower air inlet joint 17 is fixedly installed on the right side of the lower mold 15, and the lower air inlet joint 17 is connected to the lower air flow holes 16. A lower circulation pipe 18 is fixedly installed on the left side of the lower mold 15, and the lower circulation pipe 18 is connected to the lower air flow holes 16. An injection pipe 19 is fixedly installed on the right side of the lower mold 15, and a demolding component 110 is fixedly installed at the bottom of the lower mold 15.

[0032] Two upper air inlet connectors 13 and two injection molding pipes 19 are respectively connected to the inlet and outlet of the constant temperature machine. Upper flow holes 12 and lower flow holes 16 are respectively formed inside the upper mold 11 and the lower flow holes 16. Through the two upper air inlet connectors 13, the upper circulation pipe 14, the two lower air inlet connectors 17 and the lower circulation pipe 18, the constant temperature air flow flows inside the upper flow holes 12 and the lower flow holes 16, thereby controlling the temperatures of the upper mold 11 and the lower mold 15 and improving the injection molding effect.

[0033] Meanwhile, the content not described in detail in this specification belongs to the prior art well known to those skilled in the art.

[0034] During operation, first, the upper mold 11 and the lower mold 15 are combined. The two upper air inlet connectors 13 and the two injection molding pipes 19 are respectively connected to the inlet and outlet of the constant temperature machine. Then, the motor 221 operates to drive the worm 222 to rotate. The worm 222 drives the worm gear 219 to rotate. The worm gear 219 drives the lead screw 212 to rotate. The lead screw 212 drives the linkage disk 213 to descend. The linkage disk 213 drives the linkage rod 214 to move synchronously. The linkage rod 214 enables the linkage column 218 to slide inside it through the linkage groove 215, driving the clamping rod 217 to slide inside the connecting seat 216. The upper end of the clamping rod 217 presses down on the four sides of the top of the upper mold 11, thereby making the combination between the upper mold 11 and the lower mold 15 tight. Then, through the two upper air inlet connectors 13, the upper circulation pipe 14, the two lower air inlet connectors 17 and the lower circulation pipe 18, the constant temperature air flow flows inside the upper flow holes 12 and the lower flow holes 16 to control the temperatures of the upper mold 11 and the lower mold 15. Then, hard glue is injected into the inside of the lower mold 15 through the injection molding pipe 19, and soft glue is injected through the injection port on the top of the upper mold 11, completing the injection of soft glue into the hard glue product.

[0035] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or sequence between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to this process, method, article or device.

[0036] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An injection mold structure for adding soft plastic injection molding to a hard plastic product, characterized in that: The invention comprises a mold mechanism (1), wherein a mold tightening mechanism (2) is arranged at the bottom of the mold mechanism (1) for making the mold close tightly, and the mold tightening mechanism (2) comprises: The clamping unit (21) is arranged at the bottom of the mold mechanism (1), and comprises a base (211) and a connecting seat (216); a screw rod (212) is rotatably mounted on the top of the base (211); a linkage disk (213) is rotatably mounted on the surface of the screw rod (212); linkage rods (214) are fixedly mounted on the four ends of the linkage disk (213); a clamping rod (217) is rotatably mounted inside the connecting seat (216); and a linkage column (218) is fixedly mounted on one end of the clamping rod (217); The driving unit (22) is arranged above the base (211) and is used to provide kinetic energy.

2. The injection mold structure for adding soft plastic injection molding to a hard plastic product according to claim 1, characterized in that: A linkage groove (215) is provided inside the linkage rod (214), and the linkage column (218) is adapted to slide inside the linkage groove (215).

3. The injection mold structure for adding soft plastic injection molding to a hard plastic product according to claim 2, characterized in that: The driving unit (22) comprises a motor (221) fixedly mounted on the top of the base (211); a worm (222) is fixedly mounted on the output end of the motor (221); a fixing seat (223) is fixedly mounted on the top of the base (211); and one end of the worm (222) is rotatably mounted inside the fixing seat (223).

4. The injection mold structure for adding soft plastic injection molding to a hard plastic product according to claim 3, characterized in that: A worm wheel (219) is fixedly mounted on the surface of the screw rod (212), and the worm wheel (219) is meshedly mounted with the worm rod (222).

5. The injection mold structure for adding soft plastic injection molding to a hard plastic product according to claim 1, characterized in that: The mold mechanism (1) comprises an upper mold (11), two upstream air holes (12) are provided inside the upper mold (11), an upper air inlet joint (13) is fixedly installed on the right side of the upper mold (11), and the upper air inlet joint (13) is connected to the upstream air holes (12), and an upper circulation pipe (14) is fixedly installed on the left side of the upper mold (11), and the upper circulation pipe (14) is connected to the upstream air holes (12).

6. The injection mold structure for adding soft plastic injection molding to a hard plastic product according to claim 5, characterized in that: The mold mechanism (1) also includes a lower mold (15), and the lower mold (15) is matched with the upper mold (11), and two downstream air holes (16) are opened inside the lower mold (15), a lower air inlet joint (17) is fixedly installed on the right side of the lower mold (15), and the lower air inlet joint (17) is connected to the downstream air holes (16), a lower circulation pipe (18) is fixedly installed on the left side of the lower mold (15), and the lower circulation pipe (18) is connected to the downstream air holes (16), an injection tube (19) is fixedly installed on the right side of the lower mold (15), and a demoulding component (110) is fixedly installed at the bottom of the lower mold (15).

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