Positioning clamp for plastic mold machining

Abstract

The utility model discloses a positioning fixture for processing a plastic mould, and relates to the technical field of positioning fixtures. The positioning clamp for plastic mold machining comprises a base and two symmetrical clamping plates which are arranged on the upper surface of the base in a sliding mode and used for clamping a plastic mold. And the driving assembly comprises two rectangular grooves symmetrically formed in the upper surface of the base, rotating holes are formed in the inner side walls of the two rectangular grooves, and bidirectional lead screws extending to the inner walls of the two rectangular grooves correspondingly are rotationally arranged on the inner walls of the rotating holes. According to the positioning clamp, the driving assembly is arranged, so that when the positioning clamp actually clamps a plastic mold, the driving motor can be started, the plastic mold can be automatically clamped and fixed, in the clamping process, the aim of accurately controlling the clamping pressure can be achieved, the stability of the clamped plastic mold is guaranteed, and meanwhile the clamping efficiency is improved. And further effective protection on the plastic mold is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of positioning jigs, in particular to a positioning jig for plastic mold processing. Background Technique

[0002] A plastic mold is a short name for a combined mold used for compression molding, extrusion molding, injection molding, blow molding, and low-foam molding. Coordinated changes in the convex and concave molds and the auxiliary molding system of the mold can process a series of plastic parts with different shapes and sizes. During the processing of plastic molds, a positioning jig is required to clamp and fix the plastic mold. There is a prior patent on a positioning jig for plastic mold processing, with the patent publication number CN210703706U. It includes a clamping table, an electric cylinder is installed on the electric cylinder seat at one end of the clamping table, the output end of the electric cylinder is fixedly connected with an electric screw rod, and a clamping mechanism is movably arranged on the upper part of the clamping table; the clamping mechanism includes a support plate, the bottom of the support plate is connected with a push plate through a support rod, a third support rod is connected above the support rod, the third support rod is connected with a second support rod, the second support rod is connected with a clamping plate, a manual screw rod is connected inside the support plate, the top of the manual screw rod is connected with a bearing seat, and the two sides of the bearing seat are connected with the second support rod through a first support rod; the utility model fixes and clamps the clamping mechanism through the push plate and the clamping plate; and the clamping plate is movably connected through a pin rod, and the clamping distance is adjusted through the manual screw rod to increase the use range of the clamping mechanism.

[0003] Regarding the above related technologies, the inventor believes that there are the following defects: The technical solution proposed by the above patent technology cannot accurately control the clamping force during actual use, resulting in the situation that during clamping, the clamping force is too small to stably clamp the plastic mold, or the clamping force is too large to damage the plastic mold.

[0004] Therefore, we propose a positioning jig for plastic mold processing to solve the above problems. Content of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the utility model provides a positioning jig for plastic mold processing, which solves the problem of ineffective protection of plastic molds in the prior art.

[0006] To achieve the above purposes, the utility model is realized through the following technical solutions: A positioning jig for plastic mold processing, comprising:

[0007] A base, and two symmetric clamping plates slidably arranged on the upper surface of the base for clamping the plastic mold;

[0008] A driving component, which is used to drive two clamping plates to move towards each other simultaneously. The driving component includes two rectangular grooves symmetrically opened on the upper surface of the base, and the inner side walls of the two rectangular grooves are provided with rotation holes. A bidirectional lead screw extending to the inner walls of the two rectangular grooves is rotatably arranged on the inner wall of the rotation hole. And a driving motor for driving the bidirectional lead screw to rotate is arranged on the side surface of the base. L-shaped sliders are slidably arranged on the inner walls of the two rectangular grooves, and the ends of the two L-shaped sliders are respectively fixedly connected to the surfaces of the two clamping plates. A buffer groove is opened on the surface of the clamping plate, and a buffer plate is slidably arranged on the inner wall of the buffer groove. Two groups of buffer springs are symmetrically fixed on the surface of the buffer plate, and the other ends of the buffer springs are fixedly connected to the inner side wall of the buffer groove. The driving component further includes a pressure sensor fixed on the inner side wall of the buffer groove and a PLC controller fixed on the upper surface of the base, and the pressure sensor and the driving motor are both electrically connected to the PLC controller through wires;

[0009] An anti-slip component, which is used to protect the plastic mold fixed between the two clamping plates.

[0010] Preferably, two symmetrical limit slide bars are fixed on the inner wall of the rectangular groove, and two through holes slidably connected to the outer surfaces of the two limit slide bars and threaded holes threadedly connected to the outer surface of the bidirectional lead screw are respectively opened on the side surfaces of the L-shaped slider.

[0011] Preferably, the output end of the driving motor extends into the interior of one of the rectangular grooves and is fixedly connected to one end of the bidirectional lead screw, and the other end of the bidirectional lead screw is rotatably connected to the inner side wall of the other rectangular groove.

[0012] Preferably, the anti-slip component includes a first cylindrical cavity opened on the side surface of the buffer plate corresponding to the buffer spring and a second cylindrical cavity opened on the other surface of the buffer plate corresponding to the first cylindrical cavity.

[0013] Preferably, a sealing piston is slidably arranged on the inner wall of the first cylindrical cavity, and a push rod is fixedly arranged at the end of the sealing piston. The other end of the push rod is fixedly connected to the inner side wall of the buffer groove, and the buffer spring is sleeved on the outer surface of the push rod.

[0014] Preferably, a rubber column is slidably arranged on the inner wall of the second cylindrical cavity, and a plurality of rubber anti-slip protrusions are arranged in a circumferential array at the end of the rubber column.

[0015] Preferably, a ventilation hole communicating with the first cylindrical cavity is opened on the inner wall of the second cylindrical cavity, a return spring is fixedly arranged at the other end of the rubber column, and the other end of the return spring is fixedly connected to the inner side wall of the second cylindrical cavity.

[0016] Beneficial effects

[0017] The utility model provides a positioning fixture for plastic mold processing. Compared with the prior art, the following beneficial effects are achieved:

[0018] For the positioning fixture for plastic mold processing, by arranging a driving component, when the positioning fixture actually clamps the plastic mold, the driving motor can be started to automatically clamp and fix the plastic mold. During the clamping process, the purpose of accurately controlling the clamping pressure can be achieved, ensuring the stability of the plastic mold after clamping and realizing further effective protection for the plastic mold. Moreover, by arranging an anti-slip component, the stability during plastic mold processing is effectively improved, and relative displacement between the plastic mold and the buffer plate is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a three-dimensional structural schematic diagram of the utility model;

[0020] Figure 2 is a rear-view structural schematic diagram of the utility model;

[0021] Figure 3 is a sectional structural schematic diagram of the clamping plate of the utility model;

[0022] Figure 4 is the utility model Figure 3 The enlarged structural schematic diagram at position A in the utility model.

[0023] In the figure:

[0024] 100, base;

[0025] 200, clamping plate;

[0026] 300, driving component; 301, rectangular groove; 302, bidirectional lead screw; 303, driving motor; 304, L-shaped slider; 305, buffer groove; 306, buffer plate; 307, buffer spring; 308, pressure sensor; 309, PLC controller; 3010, limit slide bar;

[0027] 400, anti-slip component; 401, first cylindrical cavity; 402, second cylindrical cavity; 403, sealing piston; 404, push rod; 405, rubber column; 406, rubber anti-slip protrusion; 407, ventilation hole; 408, return spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to 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 the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0029] Example 1

[0030] Please refer to Figures 1-4 , the present utility model provides a technical solution: a positioning fixture for plastic mold processing, including:

[0031] A base 100, and two symmetrical clamping plates 200 that are slidably arranged on the upper surface of the base 100 and used for clamping the plastic mold;

[0032] A driving assembly 300, which is used to drive the two clamping plates 200 to move towards each other simultaneously. The driving assembly 300 includes two rectangular grooves 301 symmetrically opened on the upper surface of the base 100, and the inner side walls of the two rectangular grooves 301 are provided with rotation holes. A bidirectional lead screw 302 that respectively extends to the inner walls of the two rectangular grooves 301 is rotatably arranged on the inner wall of the rotation hole. And a driving motor 303 for driving the bidirectional lead screw 302 to rotate is arranged on the side surface of the base 100. The output end of the driving motor 303 extends into the interior of one rectangular groove 301 and is fixedly connected to one end of the bidirectional lead screw 302. The other end of the bidirectional lead screw 302 is rotatably connected to the inner side wall of the other rectangular groove 301, which is convenient for driving the bidirectional lead screw 302 to rotate automatically through the rotation of the driving motor 303.

[0033] L-shaped sliders 304 are slidably arranged on the inner walls of the two rectangular grooves 301, and the end parts of the two L-shaped sliders 304 are respectively fixedly connected to the surfaces of the two clamping plates 200. Two symmetrical limit slide rods 3010 are fixedly arranged on the inner wall of the rectangular groove 301, and two through holes that are slidably connected to the outer surfaces of the two limit slide rods 3010 and threaded holes that are threadedly connected to the outer surface of the bidirectional lead screw 302 are respectively opened on the side surfaces of the L-shaped sliders 304, which can effectively ensure the stability of the L-shaped slider 304 during movement under the action of the two limit slide rods 3010.

[0034] A buffer groove 305 is opened on the surface of the clamping plate 200, and a buffer plate 306 is slidably arranged on the inner wall of the buffer groove 305. Two groups of buffer springs 307 are symmetrically fixedly arranged on the surface of the buffer plate 306, and the other ends of the buffer springs 307 are fixedly connected to the inner side wall of the buffer groove 305. The driving assembly 300 further includes a pressure sensor 308 fixedly arranged on the inner side wall of the buffer groove 305 and a PLC controller 309 fixedly arranged on the upper surface of the base 100, and the pressure sensor 308 and the driving motor 303 are both electrically connected to the PLC controller 309 through wires;

[0035] In this embodiment, by setting the driving component 300, when the positioning fixture actually clamps the plastic mold, the driving motor 303 can be started to automatically clamp and fix the plastic mold. During the clamping process, the purpose of accurately controlling the clamping pressure can be achieved, ensuring the stability of the plastic mold after clamping and further effectively protecting the plastic mold.

[0036] Embodiment 2

[0037] On the basis of Embodiment 1 and different from Embodiment 1,

[0038] A positioning fixture for plastic mold processing further includes:

[0039] An anti-slip component 400, which is used to protect the plastic mold fixed between the two clamping plates 200.

[0040] The anti-slip component 400 includes a first cylindrical cavity 401 opened on the side surface of the buffer plate 306 corresponding to the buffer spring 307, and a second cylindrical cavity 402 opened on the other surface of the buffer plate 306 corresponding to the first cylindrical cavity 401, and the number of the first cylindrical cavity 401 and the second cylindrical cavity 402 is several.

[0041] A sealing piston 403 is slidably arranged on the inner wall of the first cylindrical cavity 401, and a push rod 404 is fixedly arranged at the end of the sealing piston 403. The other end of the push rod 404 is fixedly connected to the inner side wall of the buffer groove 305, and the buffer spring 307 is sleeved on the outer surface of the push rod 404, facilitating the push rod 404 to push the sealing piston 403.

[0042] A rubber column 405 is slidably arranged on the inner wall of the second cylindrical cavity 402, and a plurality of rubber anti-slip protrusions 406 are arranged in a circumferential array at the end of the rubber column 405. The arrangement of the rubber anti-slip protrusions 406 effectively increases the friction force between the contact surface of the buffer plate 306 and the plastic mold.

[0043] An air vent hole 407 communicating with the first cylindrical cavity 401 is opened on the inner wall of the second cylindrical cavity 402. The other end of the rubber column 405 is fixedly provided with a return spring 408, and the other end of the return spring 408 is fixedly connected to the inner side wall of the second cylindrical cavity 402, facilitating the rubber column 405 to be reset in time after the processing is completed.

[0044] In this embodiment, by setting the anti-slip component 400, during the process of the buffer plate 306 sliding on the inner wall of the buffer groove 305, the end of the rubber column 405 can gradually abut against the surface of the plastic mold, and under the action of the rubber anti-slip protrusions 406, the stability during the plastic mold processing is effectively improved, and the relative displacement between the plastic mold and the buffer plate 306 is avoided.

[0045] During operation, when the positioning fixture actually clamps the plastic mold, the plastic mold can be first placed at the central position on the base 100, and then the driving motor 303 is started. The rotation of the driving motor 303 drives the rotation of the bidirectional lead screw 302. The rotation of the bidirectional lead screw 302 drives the two L-shaped sliders 304 to move towards the middle simultaneously, thereby driving the two clamping plates 200 to move towards the middle simultaneously, so that the two clamping plates 200 automatically clamp and fix the plastic mold. During the clamping process, the buffer plate 306 can contact the plastic mold and drive the buffer plate 306 to slide on the inner wall of the buffer groove 305. Under the action of the buffer spring 307, the clamping force can be effectively buffered, realizing effective protection of the plastic mold during the clamping process. When the buffer plate 306 contacts the pressure sensor 308 and the value displayed by the pressure sensor 308 reaches the value preset through the PLC controller 309, at this time, the pressure sensor 308 transmits a signal to the PLC controller 309, and the PLC controller 309 automatically controls the driving motor 303 to turn off, thereby achieving the purpose of precisely controlling the clamping pressure, ensuring the stability of the plastic mold after clamping and realizing further effective protection of the plastic mold. Moreover, during the process of the buffer plate 306 sliding on the inner wall of the buffer groove 305, the push rod 404 can be driven to push the sealing piston 403 to move, so that the sealing piston 403 presses the gas in the first cylindrical cavity 401 into the second cylindrical cavity 402 through the ventilation hole 407, thereby driving the rubber column 405 to move on the inner wall of the second cylindrical cavity 402, so that the end of the rubber column 405 gradually abuts against the surface of the plastic mold. Under the action of the rubber anti-slip protrusions 406, the stability during the processing of the plastic mold is effectively improved, and relative displacement between the plastic mold and the buffer plate 306 is avoided.

[0046] Meanwhile, the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

Claims

1. A positioning fixture for plastic mold processing, characterized in that Including: A base (100), and two symmetric clamping plates (200) slidably arranged on the upper surface of the base (100) for clamping a plastic mold; A driving assembly (300) for driving the two clamping plates (200) to move towards each other simultaneously. The driving assembly (300) includes two rectangular grooves (301) symmetrically formed on the upper surface of the base (100), and rotation holes are formed on the inner side walls of the two rectangular grooves (301). A bidirectional lead screw (302) rotatably arranged on the inner wall of the rotation hole and extending to the inner walls of the two rectangular grooves (301) is provided. A driving motor (303) for driving the bidirectional lead screw (302) to rotate is arranged on the side surface of the base (100). L-shaped sliders (304) are slidably arranged on the inner walls of the two rectangular grooves (301), and the end parts of the two L-shaped sliders (304) are fixedly connected to the surfaces of the two clamping plates (200) respectively. A buffer groove (305) is formed on the surface of the clamping plate (200), and a buffer plate (306) is slidably arranged on the inner wall of the buffer groove (305). Two groups of buffer springs (307) are symmetrically fixed on the surface of the buffer plate (306), and the other ends of the buffer springs (307) are fixedly connected to the inner side wall of the buffer groove (305). The driving assembly (300) further includes a pressure sensor (308) fixed on the inner side wall of the buffer groove (305), and a PLC controller (309) fixed on the upper surface of the base (100). The pressure sensor (308) and the driving motor (303) are both electrically connected to the PLC controller (309) through wires; An anti-slip assembly (400) for protecting the plastic mold fixed between the two clamping plates (200).

2. The positioning fixture for plastic mold processing according to claim 1, characterized in that: Two symmetric limiting slide bars (3010) are fixed on the inner wall of the rectangular groove (301), and two through holes slidably connected to the outer surfaces of the two limiting slide bars (3010) and threaded holes threaded with the outer surface of the bidirectional lead screw (302) are respectively formed on the side surfaces of the L-shaped slider (304).

3. A positioning fixture for plastic mold processing according to claim 1, characterized in that: The output end of the driving motor (303) extends into one of the rectangular grooves (301) and is fixedly connected to one end of the bidirectional lead screw (302), and the other end of the bidirectional lead screw (302) is rotatably connected to the inner side wall of the other rectangular groove (301).

4. A positioning fixture for plastic mold processing according to claim 1, characterized in that: The anti-slip assembly (400) includes a first cylindrical cavity (401) formed on the side surface of the buffer plate (306) corresponding to the buffer spring (307), and a second cylindrical cavity (402) formed on the other surface of the buffer plate (306) corresponding to the first cylindrical cavity (401).

5. The positioning fixture for plastic mold processing according to claim 4, characterized in that: A sealing piston (403) is slidably arranged on the inner wall of the first cylindrical cavity (401), and a push rod (404) is fixed to the end of the sealing piston (403). The other end of the push rod (404) is fixedly connected to the inner side wall of the buffer groove (305), and the buffer spring (307) is sleeved on the outer surface of the push rod (404).

6. The positioning fixture for plastic mold processing according to claim 5, characterized in that: A rubber column (405) is slidably arranged on the inner wall of the second cylindrical cavity (402), and a plurality of rubber anti-slip protrusions (406) are arranged in a circumferential array at the end of the rubber column (405).

7. A positioning fixture for plastic mold processing according to claim 6, characterized in that: An air vent hole (407) communicating with the first cylindrical cavity (401) is formed in the inner wall of the second cylindrical cavity (402). The other end of the rubber column (405) is fixedly provided with a return spring (408), and the other end of the return spring (408) is fixedly connected to the inner side wall of the second cylindrical cavity (402).

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