Cutting device of plastic shell for circuit breaker

Abstract

The utility model discloses a cutting device for a plastic shell for a circuit breaker, which belongs to the technical field of plastic product processing and comprises a supporting part for fixing the plastic shell for the circuit breaker. The cutting part is positioned above the supporting part; the power mechanism drives the cutting part to move; the cutting part comprises a profiling cutting plate, the upper surface of a cutting needle fixing plate is connected with a top plate, a plurality of profiling cutting needles, supporting columns and guide spring columns are arranged on the lower surface of the cutting needle fixing plate, the lower ends of springs are connected with sliding blocks, and holes allowing the sliding blocks to penetrate through are formed in the profiling cutting plate; a groove matched with the profiling cutter is formed in the bottom of the profiling cutting plate, and a profiling hole matched with the outer contour of the plastic shell for the circuit breaker is formed in the profiling cutter; angle blades are arranged at the lower edges of the profiling hole and the profiling cutting needle; the supporting part comprises a base, a positioning table is installed on the upper surface of the base, and a hole matched with the profiling cutting needle is formed in the upper surface of the positioning table; the device solves the problems that in the prior art, a manual cutting mode is low in efficiency and poor in cutting quality.

Description

Technical Field

[0001] The utility model belongs to the technical field of plastic product processing, and in particular relates to a cutting device for a plastic shell of a circuit breaker. Background Art

[0002] As we all know, thermosetting plastic injection molding is an efficient mass production method that melts thermoplastics and quickly injects them into a closed mold under high pressure, completing plastic molding and chemical curing and cross-linking at the same time. In the whole process, plastic molding and curing are carried out simultaneously, and the production efficiency is very high. However, once the product is formed, it cannot be plasticized again, so the mold design accuracy and production process control are very high. The flash and material handle of thermosetting plastic products are common problems in the injection molding process.

[0003] Generally, it is necessary to minimize the flash by trimming the mold and optimizing the process parameters, and use post-processing procedures such as trimming to remove the remaining flash and material handles. For complex precision products such as circuit breaker housings, the presence of flash and material handles seriously affects product assembly and performance and must be completely removed.

[0004] The existing technology basically uses manual shearing or breaking to process the flash and material handles of precision products, but there are the following problems:

[0005] First, precision products such as circuit breaker housings usually have many tiny internal structures, holes and gaps. These areas are difficult to reach with hand tools. Manual trimming is time-consuming and inefficient, making it difficult to meet the needs of mass production.

[0006] Second, manual trimming relies on the skills and experience of the operator and lacks unified operating specifications and quality standards. It is difficult to ensure that every part can completely remove the flash, and it is easy to miss. The remaining flash will affect subsequent assembly and even cause product performance problems, ultimately reducing product yield. Utility Model Content

[0007] The utility model aims to provide a cutting device for a plastic casing of a circuit breaker, so as to solve the technical problems of low efficiency and poor cutting quality in the manual cutting method proposed in the above background technology.

[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0009] A cutting device for a plastic casing of a circuit breaker, comprising:

[0010] A support for fixing a plastic housing for a circuit breaker;

[0011] A cutting portion located above the supporting portion and used for cutting the plastic housing of the circuit breaker;

[0012] A power mechanism that drives the cutting part to move up and down; wherein:

[0013] The cutting part comprises a cutting needle fixing plate and a profiling cutting plate, the upper surface of the cutting needle fixing plate is connected to the top plate, a plurality of profiling cutting needles, a plurality of supporting columns and a plurality of guiding spring columns are arranged on the lower surface of the cutting needle fixing plate, the guiding spring column comprises a spring and a guiding column penetrating the spring, the lower end of the spring is connected to a slider, a hole for the slider to pass through is provided on the profiling cutting plate, a groove matching with the profiling cutter is provided at the bottom of the profiling cutting plate, and a profiling hole matching with the outer contour of the plastic housing for the circuit breaker is provided on the profiling cutter; angle blades are provided on the lower edges of the profiling cutting needle and the profiling hole;

[0014] The cutting needle fixing plate is used to fix the profiling cutting needle so that it maintains a stable position and direction; the profiling cutting needle is designed with a cutting edge according to the shape of the hole inside the product, and is used to cut the flash and material handle inside the product; a groove matching the profiling cutter is arranged at the bottom of the profiling cutting plate, so as to facilitate the replacement of the profiling cutter that is worn out after long-term use; the profiling cutter is processed with a matching groove according to the shape of the product, and is used to cut the flash on the periphery of the product. The top plate is located on the upper surface of the cutting needle fixing plate, that is, at the top of the entire cutting part, and plays a role in strengthening the connection and preventing deformation; the support column is connected to the lower surface of the cutting needle fixing plate, and is used to fix the connection with the cutting needle fixing plate to ensure its stability; the guide column is used to ensure the vertical deformation of the spring, and to prevent the spring from deforming too much during the operation of the device to affect the reset of the slider; one end of the spring is connected to the cutting needle fixing plate, and the other end is connected to the slider, which is used to reset the slider after the cutting is completed, and to eject the cut circuit breaker casing to avoid the cut casing being stuck in the profiling hole of the profiling cutter; the corner blade fits the product to cut off the flash and material handle of the product periphery and pores.

[0015] The support part comprises a base, a positioning platform is installed on the upper surface of the base, and a hole cooperating with the contour cutting needle is arranged on the upper surface of the positioning platform.

[0016] The positioning platform is provided with a protrusion matching the plastic shell of the circuit breaker, ensuring the precise positioning of the plastic shell of the circuit breaker to be processed, so as to ensure the subsequent accurate cutting; the surface of the positioning platform is provided with a hole matching the profiling cutting needle, ensuring the precise correspondence between each part of the shell and the profiling cutting plate and the profiling cutting needle of the cutting part, so as to ensure the cutting quality; the lower surface of the positioning platform is connected to the base, providing installation support for the shell positioning platform, and providing support for the entire device when the device is running.

[0017] Preferably, the profiling cutting needle and the cutting needle fixing plate are connected by threads, which are used to tighten and fix the profiling cutting needle on the cutting needle fixing plate, so as to facilitate the replacement and maintenance of the profiling cutting needle at a later stage.

[0018] Preferably, the slider is provided with a plurality of holes for the profiling cutting needle to pass through, so that the profiling cutting needle can pass through and drive the slider to move up and down.

[0019] Preferably, a plurality of guide posts are provided on the bottom surface of the profiling cutting plate; guide post holes for cooperating with the guide posts are provided on the base; the guide posts on the bottom surface of the profiling cutting plate cooperate with the guide post holes on the base, and by observing the position status of the guide posts and the guide post holes, it is possible to intuitively judge whether the cutting part and the supporting part remain coaxial, whether there are abnormal conditions such as jamming or deflection, etc., which is convenient for the operator to make timely adjustments and maintenance.

[0020] Preferably, the base includes a bottom plate and supporting feet located on the lower surface of the bottom plate, which are used to enhance the supporting strength and stability of the base.

[0021] Preferably, the supporting foot is L-shaped or cylindrical.

[0022] Preferably, the base plate and the supporting legs are integrally formed, which can simplify the processing and assembly procedures.

[0023] Preferably, the top plate, cutting needle fixing plate, supporting column, contoured cutting plate and guide column are fixedly connected by long bolts, so as to facilitate the disassembly and maintenance of each component.

[0024] Compared with the prior art, the beneficial effects of the utility model are:

[0025] 1. The utility model solves the technical problems of low efficiency and poor cutting quality of manual cutting in traditional technology by providing a cutting device for the plastic shell of a circuit breaker, and can realize mass production; by providing a profiling cutting needle and a profiling cutting knife, the shape of the cutting edge is highly consistent with the inner and outer contours of the shell, and can accurately fit the product surface during cutting to ensure a neat and smooth incision; by providing a groove that cooperates with the profiling cutting knife at the bottom of the profiling cutting plate, it is easy to replace the profiling cutting knife that has been worn out after long-term use, and the maintenance cost is low.

[0026] 2. The utility model further improves the cutting yield rate by setting guide pillars, guide pillar holes and guide spring pillars; the cooperation between the guide pillars and the guide pillar holes can intuitively reflect the stress state of the cutting part and the supporting part, which is convenient for the operator to make timely adjustments and eliminate abnormal conditions such as jamming and deflection, thereby effectively reducing the product cutting defect rate; under the action of the spring of the guide spring pillar, the slider can reliably push the product away from the profiling cutter, avoiding secondary damage caused by the adhesion between the product and the profiling cutter, and further improving the cutting yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the cutting part and the supporting part in the pressed state of the preferred embodiment of the utility model;

[0028] Figure 2 It is a schematic diagram of the cutting part and the supporting part being separated in the preferred embodiment of the utility model;

[0029] Figure 3 An exploded view of the cutting portion in a preferred embodiment of the utility model;

[0030] Figure 4 It is an exploded view of the cutting needle fixing plate and the contour cutting plate in the preferred embodiment of the utility model.

[0031] In the figure: 100, cutting part; 101, top plate; 102, cutting needle fixing plate; 103, supporting column; 104, contour cutting needle; 105, guide spring column; 106, sliding block; 107, contour cutting plate; 108, contour cutting knife; 109, guide column; 200, supporting part; 201, positioning table; 202, bottom plate; 203, supporting foot. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. All other embodiments obtained by ordinary technicians in the field without creative work based on the embodiments of the utility model shall fall within the scope of protection of the utility model.

[0033] like Figure 1 - Figure 4 As shown:

[0034] First embodiment: A cutting device for a plastic housing of a circuit breaker, comprising:

[0035] A support for fixing a plastic housing for a circuit breaker;

[0036] A cutting portion 100 located above the supporting portion and used for cutting the plastic housing of the circuit breaker;

[0037] A power mechanism that drives the cutting part to move up and down; wherein:

[0038] The cutting part 100 includes a cutting needle fixing plate 102 and a profiling cutting plate 107. The cutting needle fixing plate 102 is used to fix the profiling cutting needle 104 to keep it in a stable position and direction. The top plate 101 is located on the upper surface of the cutting needle fixing plate 102, that is, located at the top of the entire cutting part 100, and plays a role in strengthening the connection and preventing deformation.

[0039] A plurality of profiling cutting needles 104, a plurality of supporting columns 103 and a plurality of guiding spring columns 105 are arranged on the lower surface of the cutting needle fixing plate 102. The lower end of the spring is connected to a slider 106. A hole for the slider 106 to pass through is provided on the profiling cutting plate 107. The slider 106 is used to reset the slider 106 after the cutting is completed, and the cut circuit breaker housing is ejected to prevent the cut housing from being stuck in the profiling hole of the profiling cutter 108. The supporting column 103 is connected to the lower surface of the cutting needle fixing plate 102, and is used to fix the cutting needle fixing plate 102 to ensure its stability. The guiding spring column is used to ensure the vertical deformation of the spring during the operation of the device, and to prevent the spring 105 from deforming too much and affecting the reset of the slider 106.

[0040] The power mechanism may be a pneumatic cylinder; the piston rod of the pneumatic cylinder telescopically moves downward vertically, and the lower end of the piston rod is fixedly connected to the upper surface of the top plate 101;

[0041] Specifically, the guide spring column 105 utilizes the elastic deformation characteristics of the spring, and when the cutting part 100 is pressed down, the slider 106 can slide axially along the guide spring column 105. When the cutting is completed and the cutting part 100 rises, the spring returns to its original state, pushing the slider 106 to return to its original state.

[0042] The bottom of the profiling cutting plate 107 is provided with a groove matched with the profiling cutter 108, so as to facilitate the replacement of the profiling cutter 108 which is worn out after long-term use;

[0043] The profiling cutter 108 is provided with a profiling hole matching the outer contour of the plastic housing for the circuit breaker; the profiling hole and the lower edge of the profiling cutting needle 104 are provided with an angle blade; the angle blade fits the product to cut off the flash on the periphery and pores of the product. The function of the angle blade to remove the flash is a combined effect of shearing, extrusion and tearing. The geometric structure of the angle blade is used to generate stress concentration at the connection between the flash and the product body, and the flash connection is weakened by shear deformation and extrusion deformation, and finally the flash is torn and separated along the weak area, thereby realizing the rapid removal of the flash.

[0044] The support part 200 includes a base, and a positioning platform 201 is installed on the upper surface of the base. The upper surface of the positioning platform 201 is provided with a hole that matches the profiling cutting needle 104, which is used to ensure that various parts of the shell are accurately corresponding to the profiling cutting plate 107 and the profiling cutting needle 104 of the cutting part 100, thereby ensuring the cutting quality; the positioning platform 201 is provided with a protrusion that matches the plastic shell of the circuit breaker, ensuring that the plastic shell of the circuit breaker to be processed is accurately positioned to ensure subsequent accurate cutting; the base provides installation support for the positioning platform 201, and at the same time provides support for the entire device when the device is running.

[0045] Second embodiment: Based on the above-mentioned first embodiment, the profiling cutting needle 104 and the cutting needle fixing plate 102 are connected by threads; it is used to tighten and fix the profiling cutting needle 104 on the cutting needle fixing plate 102, so as to facilitate the replacement and maintenance of the profiling cutting needle 104 at a later stage.

[0046] The third embodiment: Based on the above-mentioned first embodiment, the slider 106 is provided with a plurality of holes for the profiling cutting needle 104 to pass through, so that the profiling cutting needle 104 can pass through and drive the slider 106 to move up and down.

[0047] Fourth embodiment: On the basis of the first or third embodiment, a plurality of guide posts 109 are provided on the bottom surface of the profiling cutting plate 107; guide post holes for cooperating with the guide posts 109 are provided on the base; the guide posts 109 on the bottom surface of the profiling cutting plate 107 cooperate with the guide post holes on the base, and by observing the position status of the guide posts 109 and the guide post holes, it is possible to intuitively judge whether the cutting portion 100 and the supporting portion 200 remain coaxial, and whether there are abnormal conditions such as jamming or deflection, which is convenient for the operator to make timely adjustments and maintenance.

[0048] Fifth embodiment: Based on the first embodiment, the base includes a bottom plate 202 and supporting feet 203 located on the lower surface of the bottom plate, so as to enhance the supporting strength and stability of the base.

[0049] Sixth embodiment: Based on the above-mentioned first embodiment, the base plate 202 and the supporting legs 203 are integrally formed, which can simplify the processing and assembly procedures.

[0050] Seventh embodiment: Based on the fifth embodiment, the support leg 203 is L-shaped or cylindrical.

[0051] Specifically, the L-shaped support legs 203 are arranged at 90 degrees, and the two L-shaped support legs 203 can form a rectangular support surface, which is mainly used to support the two sides of the bottom plate 202 to prevent the bottom plate 202 from tilting; the cylindrical support legs 203 are located in the central area of ​​the bottom plate 202, and are mainly used to support the center of the bottom plate 202 to prevent the bottom plate 202 from deforming. Through the cooperation of the L-shaped support legs 203 and the cylindrical support legs 203, the support strength and stability of the base can be significantly improved, so that the base can also maintain a horizontal state when subjected to pressure applied by the cutting part 100, ensuring the high consistency of product cutting.

[0052] Eighth embodiment: Based on the above-mentioned first embodiment, the top plate 101, the cutting needle fixing plate 102, the support column 103, the contoured cutting plate 107 and the guide column 109 are fixedly connected by long bolts, so as to facilitate the disassembly and maintenance of each component.

[0053] Working principle:

[0054] Step 1: The operator installs the circuit breaker on the positioning platform 201 using a plastic housing;

[0055] The positioning platform 201 is provided with a protrusion matching the plastic housing for the circuit breaker, so as to ensure the accurate positioning of the plastic housing for the circuit breaker to be processed, so as to ensure the subsequent accurate cutting;

[0056] Step 2: Cutting starts. Driven by the power mechanism, the cutting part 100 moves vertically downward.

[0057] The cutting part 100 moves vertically downward under the drive of the power mechanism, and the profiling holes on the profiling needle 104 and the profiling knife 108 fit the outer shape of the plastic shell of the circuit breaker, and the angle blade contacts the outer surface and the pore surface of the shell; as the cutting part 100 continues to press down, the angle blade produces shear and extrusion effects on the flash and the handle; according to material mechanics, stress concentration will occur at the connection between the flash and the handle and the shell body, and under the combined action of shear stress and extrusion stress, the material at the connection will undergo shear deformation and extrusion deformation, and the bearing capacity of the material will gradually weaken. As the cutting part 100 is further pressed down, under the continuous action of shear stress and extrusion stress, the material at the connection between the flash and the handle and the product body will undergo brittle fracture, and tearing will begin along the weak area in contact with the angle blade, and the flash and the handle material will be torn apart by the angle blade, and finally separated from the shell body.

[0058] Step 3: After cutting is completed, the cutting part 100 moves vertically upward under the drive of the power mechanism;

[0059] When the cutting part 100 is completely fitted with the supporting part 200, the cutting part 100 moves vertically upward under the drive of the power mechanism, the spring of the guide spring column 105 returns to its original state, and the slider 106 moves downward along the axis of the guide spring column 105 under the action of the spring elastic force, pushing the cut product out of the profiling hole of the profiling cutter 108 to prevent the cut shell from being stuck in the profiling hole of the profiling cutter 108; the operation is completed.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cutting device for a plastic casing of a circuit breaker, characterized in that: include: A support part (200) for fixing a plastic housing for a circuit breaker; A cutting portion (100) located above the supporting portion (200) and used for cutting the plastic housing for the circuit breaker; A power mechanism for driving the cutting part (100) to move up and down; wherein: The cutting part (100) comprises a cutting needle fixing plate (102) and a profiling cutting plate (107); the upper surface of the cutting needle fixing plate (102) is connected to the top plate (101); a plurality of profiling cutting needles (104), a plurality of supporting columns (103) and a plurality of guiding spring columns (105) are arranged on the lower surface of the cutting needle fixing plate (102); the guiding spring column (105) comprises a spring and a guiding column penetrating the spring; the lower end of the spring is connected to a sliding block (106); the profiling cutting plate (107) is provided with a hole for the sliding block (106) to pass through; the bottom of the profiling cutting plate (107) is provided with a groove matched with a profiling cutter (108); the profiling cutter (108) is provided with a profiling hole matched with the outer contour of the plastic housing for the circuit breaker; the profiling hole and the lower edge of the profiling cutting needle (104) are provided with an angled edge; The support part (200) comprises a base, a positioning platform (201) is installed on the upper surface of the base, and a hole matching the contour cutting needle (104) is provided on the upper surface of the positioning platform (201).

2. The cutting device for the plastic casing of a circuit breaker according to claim 1, characterized in that: The contoured cutting needle (104) and the cutting needle fixing plate (102) are connected via threads.

3. The cutting device for the plastic casing of a circuit breaker according to claim 1, characterized in that: The slider (106) is provided with a plurality of holes for the profile cutting needle (104) to pass through.

4. The cutting device for the plastic casing of a circuit breaker according to claim 1 or 3, characterized in that: The bottom surface of the profiling cutting plate (107) is provided with a plurality of guide posts (109); and the base is provided with guide post holes for matching with the guide posts (109).

5. The cutting device for a plastic casing of a circuit breaker according to claim 1, characterized in that: The base comprises a bottom plate (202) and supporting feet (203) located on the lower surface of the bottom plate (202).

6. The cutting device for the plastic casing of a circuit breaker according to claim 5, characterized in that: The bottom plate (202) and the supporting legs (203) are integrally formed.

7. The cutting device for the plastic casing of a circuit breaker according to claim 5, characterized in that: The supporting foot (203) is L-shaped or cylindrical.

8. The cutting device for the plastic casing of a circuit breaker according to claim 1, characterized in that: The top plate (101), the cutting needle fixing plate (102), the supporting column (103), the contoured cutting plate (107) and the guide column (109) are fixedly connected by long bolts.

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