Injection molding part broaching device

Abstract

The utility model discloses an injection molding part broaching device which comprises a broaching base, an injection molding part carrying seat arranged on the broaching base, and two positioning broaching mechanisms which are in one-to-one correspondence with pivot matching connection arms and are arranged in a mirror symmetry mode. The positioning and chambering mechanism comprises a positioning seat base with a punching type hole, a punching sliding seat capable of linearly displacing towards the positioning seat base, and a chambering cutter arranged on the punching sliding seat and opposite to the punching type hole. The positioning seat base is provided with a positioning carrying groove used for carrying the pivot matching connection arm in a positioning mode. The automatic synchronous reaming device meets the requirement for automatic synchronous reaming, the reaming operation intensity is reduced, and meanwhile the reaming efficiency is guaranteed. The double mechanisms arranged in a mirror symmetry mode are matched, the relative chambering unification degree is high, meanwhile, the carrying precision and the punching stroke precision are guaranteed, and the chambering qualification rate of products is greatly improved. And flow chambering operation of injection molding parts is easy, and operation is efficient, smooth and stable.

Description

Technical Field

[0001] The utility model relates to an injection molded part hole expanding device, belonging to the technical field of injection molded part transformation equipment. Background Art

[0002] Automobile assembly involves a large number of parts, many of which are injection molded parts. Injection molded parts themselves have certain deformation characteristics, and automobile assembly requires very high precision for injection molded parts.

[0003] Currently, there is a car armrest plate, which has two pivot coupling arms arranged at an interval. There is a rectangular coupling hole on the pivot coupling arm. The rectangular coupling hole is mainly used for positioning the rotating shaft of the pivot coupling to meet the limitation of a certain fixed angle, so the precision requirement is relatively high.

[0004] After the automobile armrest is injection molded, the rectangular matching hole will lose a certain degree of precision due to thermal expansion and contraction. When the rectangular matching hole is large, it will cause the workpiece to be directly scrapped. Therefore, when designing the injection mold, its size will be reduced, and then the secondary precision adjustment will be performed by rear-end hole expansion. This can reduce the chance of scrapping and also meet the workpiece precision requirements through secondary hole expansion.

[0005] However, conventional hole reaming is generally performed using a handheld reamer, and the hole is manually positioned through the mating through holes on the pivot mating arms, etc., and then the hole is reamed. The efficiency of the hole reaming operation is low, and the relative positioning accuracy of the mating through holes is poor. In addition, the relative reaming uniformity of the rectangular mating holes on the two pivot mating arms is relatively poor. Utility Model Content

[0006] The purpose of the utility model is to solve the deficiencies of the prior art, and to propose an injection molded part hole expanding device in view of the problems that the traditional hole expanding operation has low efficiency and the positioning accuracy and relative positioning accuracy are easily affected.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] A device for expanding a hole of an injection molded part, wherein the injection molded part comprises an automobile armrest plate, one end of the automobile armrest plate is provided with two pivot coupling arms arranged at intervals, and the two pivot coupling arms are respectively provided with rectangular coupling holes arranged opposite to each other.

[0009] It includes a hole expansion base, an injection molded part carrier arranged on the hole expansion base, and two positioning hole expansion mechanisms corresponding to the pivot coupling arms and arranged in a mirror-symmetrical manner.

[0010] The positioning and expanding hole mechanism comprises a positioning seat base having a punching hole, a punching slide seat having a linear displacement toward the positioning seat base, and an expanding hole cutter arranged on the punching slide seat and opposite to the punching hole.

[0011] The positioning base is provided with a positioning slot for positioning and mounting the pivot coupling arm.

[0012] Preferably, the positioning and reaming mechanism comprises a reaming base and a reaming linear driving source arranged on the reaming base, the positioning base is detachably arranged on the reaming base, and a through channel is formed between the positioning base and the reaming base.

[0013] The driving end of the hole expansion linear driving source passes through the through channel and is transmission-connected with the punching slide.

[0014] Preferably, a slide seat with a guide slide passing through the through channel is provided on the hole expansion base, and the driving end of the hole expansion linear drive source is connected to a connecting slide rail which is slidably fitted in the guide slide and connected to the punching slide.

[0015] Preferably, the positioning base comprises a positioning substrate and an L-shaped limiting wall plate detachably arranged on the positioning substrate, the punching hole is arranged on the positioning substrate, and the positioning slot is formed between the positioning substrate and the L-shaped limiting wall plate.

[0016] Preferably, the rectangular matching hole of the pivot matching arm is provided with a boss on one side facing the corresponding positioning substrate.

[0017] The positioning base plate is provided with a loading guide groove which matches with the boss and is connected with the punching hole.

[0018] Preferably, a protective baffle plate is provided on the hole expansion base, and the protective baffle plate is detachably arranged on the two positioning bases, and an avoidance groove is provided on the protective baffle plate in a one-to-one correspondence with the positioning grooves.

[0019] Preferably, the injection molded part carrier is provided with a matching portion for matching with the bottom wall of the automobile armrest plate.

[0020] Preferably, the alignment fitting portion comprises a positioning support block having a positioning recess.

[0021] The beneficial effects of the utility model are mainly reflected in:

[0022] 1. It meets the needs of automated synchronous hole expansion, reduces the intensity of hole expansion operations, and ensures hole expansion efficiency.

[0023] 2. The mirror-symmetrical dual-mechanism coordination achieves a relatively high uniformity in hole expansion. At the same time, the loading accuracy and punching stroke accuracy are guaranteed, and the qualified rate of hole expansion of the product is greatly improved.

[0024] 3. It is easy to operate the injection molding parts in a streamlined manner, and the operation is efficient, smooth and stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0026] Figure 1 The utility model is a structural schematic diagram of an injection molded part hole enlarging device.

[0027] Figure 2 It is a structural schematic diagram of another viewing angle of an injection molded part hole expanding device of the utility model.

[0028] Figure 3 The utility model is a side structural schematic diagram of an injection molded part hole enlarging device.

[0029] Figure 4 The utility model is a structural schematic diagram of the use state of an injection molded part hole enlarging device.

[0030] Figure 5 The utility model is a schematic structural diagram of an injection molded part mounting state of an injection molded part hole expanding device. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than to limit the utility model. It is also necessary to explain that, for ease of description, only the parts related to the relevant utility model are shown in the accompanying drawings. It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0033] The utility model provides a device for expanding the hole of an injection molded part, such as Figures 1 to 5 As shown, the injection molded part includes an automobile armrest plate 100 , one end of which is provided with two pivot coupling arms 110 disposed at intervals, and the two pivot coupling arms 110 are respectively provided with rectangular coupling holes 120 disposed opposite to each other.

[0034] The conventional hole enlarging operation uses manual knife rubbing and other methods, and the enlarging and forming precision of the rectangular matching hole 120 is insufficient. Meanwhile, the relative precision uniformity of the rectangular matching holes 120 on the two pivot matching arms 110 is poor.

[0035] This case proposes an injection molded part hole expansion device, such as Figures 1 to 5 As shown, it includes a hole expanding base 1, an injection molded part carrier 2 arranged on the hole expanding base 1, and two positioning hole expanding mechanisms 3 corresponding to the pivot coupling arms 110 and arranged in a mirror-symmetrical manner.

[0036] The positioning and expanding hole mechanism 3 includes a positioning base 4 having a punching hole 40 , a punching slide 5 having a linear displacement toward the positioning base 4 , and an expanding hole cutter 6 arranged on the punching slide 5 and opposite to the punching hole.

[0037] The positioning base 4 is provided with a positioning slot 7 for positioning and mounting the pivot coupling arm.

[0038] Specific implementation process and principle description:

[0039] When expanding the hole of the injection molded part, the automobile armrest plate 100 is mounted on the injection molded part carrier 2, and then its two pivot matching arms 110 are respectively positioned and set in the positioning slots 7. At this time, the rectangular matching holes 120 on the two pivot matching arms 110 are expanded, and the punching slide 5 performs linear punching displacement. Its hole expansion cutter 6 punches the cut material on the periphery of the rectangular matching hole 120 away from the workpiece and pushes it out along the punching hole 40. After the cutting is completed, the material is reset and unloaded.

[0040] In this way, the synchronous and automatic hole enlargement of the paired rectangular matching holes 120 is achieved, the operation intensity is reduced, and at the same time, the hole enlargement forming accuracy and relative uniformity of the two rectangular matching holes 120 are higher.

[0041] In a specific embodiment, the positioning and reaming mechanism 3 includes an reaming base 31 and an reaming linear drive source 32 arranged on the reaming base 31 . The positioning base 4 is detachably arranged on the reaming base 31 , and a through channel 30 is formed between the positioning base 4 and the reaming base 31 .

[0042] The driving end of the hole-expanding linear driving source passes through the through-channel 30 and is drivingly connected to the punching slide 5 .

[0043] Specifically, with this arrangement, the two mirror-symmetrical positioning expansion mechanisms 3 are easy to carry, no relative displacement interference occurs, and the layout is relatively compact. In addition, the driving end of the expansion linear drive source passes through the through channel 30 to guide and ensure the linear accuracy of its driving of the punching slide 5.

[0044] In a specific embodiment, a slide seat 8 with a guide slide passing through the through channel 30 is provided on the expansion base 1, and the driving end of the expansion linear drive source 32 is connected to a connecting slide rail 320 that is slidably fitted in the guide slide and connected to the punching slide.

[0045] This satisfies the needs of both outgoing and guided cooperation.

[0046] In a specific embodiment, the positioning base 4 includes a positioning substrate 41 and an L-shaped limiting wall plate 42 detachably arranged on the positioning substrate, the punching hole is arranged on the positioning substrate, and a positioning groove is formed between the positioning substrate and the L-shaped limiting wall plate.

[0047] That is, by replacing the L-shaped limiting wall plate, an adaptive positioning slot can be formed, thereby having stronger compatibility.

[0048] In a specific embodiment, a boss 130 is provided on the side of the rectangular matching hole 120 of the pivot matching arm 110 facing the corresponding positioning substrate, and a loading guide groove 43 matching with the boss 130 and connected with the punched hole is provided on the positioning substrate 4.

[0049] This meets the positioning and guiding accuracy requirements and ensures reliable punching and cutting accuracy.

[0050] In a specific embodiment, a protective baffle plate 9 is provided on the expansion base 1. The protective baffle plate is detachably arranged on the two positioning bases, and an avoidance groove 90 corresponding to the positioning groove is provided on the protective baffle plate.

[0051] The protective sealing plate can achieve dust protection and prevent debris and other debris from invading and affecting the punching quality.

[0052] In a specific embodiment, the injection molded part carrier is provided with a positioning matching portion 20 for matching with the bottom wall of the automobile armrest plate. The positioning matching portion includes a positioning support block 22 with a positioning recess 21.

[0053] This ensures the accuracy and reliability of the support positioning of the vehicle armrest.

[0054] Through the above description, it can be found that the utility model of an injection molding hole expansion device meets the needs of automatic synchronous hole expansion, reduces the intensity of hole expansion operation, and ensures the hole expansion efficiency. The dual mechanism with mirror symmetry is adopted, and the relative hole expansion uniformity is high. At the same time, the loading accuracy and punching stroke accuracy are guaranteed, and the product hole expansion qualification rate is greatly improved. It is easy to carry out the injection molding hole expansion operation, and the operation is efficient, smooth and stable.

[0055] The term "comprise" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or also includes elements inherent to such process, method, article, or apparatus / device.

[0056] So far, the technical solution of the utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings, but it is easy for those skilled in the art to understand that the protection scope of the utility model is obviously not limited to these specific embodiments. Without departing from the principle of the utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the utility model.

Claims

1. An injection molded part hole expanding device, the injection molded part comprises an automobile armrest plate, one end of the automobile armrest plate is provided with two pivot coupling arms arranged at intervals, and the two pivot coupling arms are respectively provided with rectangular coupling holes arranged oppositely, characterized in that: It includes a hole expansion base, an injection molded part carrier arranged on the hole expansion base, and two positioning hole expansion mechanisms corresponding to the pivot coupling arms and arranged in a mirror-symmetrical manner. The positioning and expanding hole mechanism comprises a positioning seat base having a punching hole, a punching slide seat having a linear displacement toward the positioning seat base, and an expanding hole cutter arranged on the punching slide seat and opposite to the punching hole. The positioning base is provided with a positioning slot for positioning and mounting the pivot coupling arm.

2. The device for expanding the hole of an injection molded part according to claim 1, characterized in that: The positioning and reaming mechanism comprises a reaming base and a reaming linear driving source arranged on the reaming base. The positioning base is detachably arranged on the reaming base. A through passage is formed between the positioning base and the reaming base. The driving end of the hole expansion linear driving source passes through the through channel and is transmission-connected with the punching slide.

3. The device for expanding the hole of an injection molded part according to claim 2, characterized in that: The hole expansion base is provided with a slide seat with a guide slide passing through the through channel, and the driving end of the hole expansion linear drive source is connected to a connecting slide rail that is slidably fitted in the guide slide and connected to the punching slide.

4. The device for expanding the hole of an injection molded part according to claim 1, characterized in that: The positioning base comprises a positioning substrate and an L-shaped limiting wall plate detachably arranged on the positioning substrate, the punching hole is arranged on the positioning substrate, and the positioning slot is formed between the positioning substrate and the L-shaped limiting wall plate.

5. The device for expanding the hole of an injection molded part according to claim 4, characterized in that: The rectangular matching hole of the pivot matching arm is provided with a boss on one side facing the corresponding positioning substrate. The positioning base plate is provided with a loading guide groove which matches with the boss and is connected with the punching hole.

6. The device for expanding a hole of an injection molded part according to claim 1, characterized in that: The expansion base is provided with a protective baffle plate, which is detachably arranged on the two positioning bases, and the protective baffle plate is provided with avoidance grooves which are arranged in a one-to-one correspondence with the positioning grooves.

7. The device for expanding the hole of an injection molded part according to any one of claims 1 to 6, characterized in that: The injection molded part carrier is provided with a matching portion for matching with the bottom wall of the automobile armrest plate.

8. The device for expanding the hole of an injection molded part according to claim 7, characterized in that: The alignment and matching portion includes a positioning support block having a positioning recess.

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