On-line detection structure for in-die pneumatic missed punching

Abstract

The utility model provides an on-line detection structure for in-mold pneumatic missed punching. The on-line detection structure is characterized in that an air inlet hole is formed in the center of a ventilation base plate; a product containing cavity is formed in the center of the bottom of the cover shell, a mounting groove is formed in the center of the top of the product containing cavity, a nitrogen spring is clamped in the mounting groove, and exhaust ports corresponding to vent holes in a product are formed in the outer side wall of the periphery of the bottom of the cover shell at equal intervals. The exhaust grooves are formed in the side, close to the interior of the containing cavity, of the exhaust port and formed in the inner side wall of the periphery of the product containing cavity at equal intervals. The plurality of groups of detection assemblies are connected through bolts and are arranged on the outer side wall of the housing at equal intervals in a surrounding manner. According to the utility model, the closed space is filled with high-pressure gas by using the vent hole structure of the product; high-speed gas leaked in the hole drives the metal blade structure to be connected with an electrified wire to generate a closed circuit, and an electrical signal is received by a PLC to detect whether each punched part has a through hole or not, so that the monitoring function of the production process is realized, and the outflow of defective products in the production process is directly avoided.

Description

Technical Field

[0001] The utility model relates to the field of detection, in particular to the technical field of detecting leaks in products during mold processing, and specifically is an in-mold pneumatic leak punching online detection structure. Background Art

[0002] There are vent holes of different diameters and numbers distributed on the airbag shell. As a safety component, the airbag shell material is generally made of high-strength steel. The diameter of the vent hole ranges from 1.5-3.2mm. The side holes are made of 2.0 high-strength steel after the material is made. The strength requirements of the punch are very high. Since the number of holes is generally between 12-24, it also increases. Due to the large number of holes and small hole diameters, it is easy for the punch to break and cause the parts to miss punching. The lack of holes will cause differences in the opening process of the airbag, affecting the function of the airbag and directly reducing the protection ability of the airbag. For this reason, if the leak holes can be directly checked during the production process, the safety risk can be greatly reduced. Summary of the Invention

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide an in-mold pneumatic missed punching online detection structure for solving the difficulties of the prior art.

[0004] To achieve the above-mentioned and other related purposes, the present invention provides an in-mold pneumatic missed punching online detection structure, comprising:

[0005] A ventilation pad 1, wherein an air inlet hole 11 is provided in the center of the ventilation pad 1;

[0006] The housing 2 has a product placement cavity 25 at the center of the bottom. A mounting groove 21 is provided at the center of the top of the product placement cavity 25. A nitrogen spring 22 is mounted in the mounting groove 21. Exhaust ports 23 corresponding to the vent holes on the product are provided at equal intervals on the outer walls around the bottom of the housing 2.

[0007] The exhaust grooves 24 are provided on the side of the exhaust port 23 close to the placement cavity. The exhaust grooves 24 are provided on the inner wall of the product placement cavity 25 at equal intervals.

[0008] The detection components 3 are provided in multiple groups, and the multiple groups of the detection components 3 are connected by bolts and are arranged around the outer wall of the cover shell 2 at equal intervals.

[0009] According to a preferred embodiment, the cover shell 2 is connected to the upper mold part of the mold and moves up and down with the upper mold part.

[0010] According to a preferred embodiment, a pipe thread is provided in the air inlet 11, and a trachea joint is connected to the air inlet 11 through threaded engagement, and high-pressure gas is introduced into the trachea joint.

[0011] According to a preferred embodiment, the inner diameter of the exhaust port 23 is slightly larger than the inner diameter of the vent hole on the product.

[0012] According to a preferred embodiment, product positioning grooves 12 are provided around the top of the ventilation pad 1 .

[0013] According to a preferred embodiment, the top and bottom of the exhaust groove 24 vertically penetrate the inner wall of the product placement chamber 25 and extend outward.

[0014] According to a preferred embodiment, the detection component 3 includes:

[0015] A mounting block 31 is provided on the outer wall of the housing 2 at equal intervals by bolt connection. A detection slot 32 is provided in the center of the side of the mounting block 31 away from the housing 2. An exhaust hole 33 is provided at the bottom of the detection slot 32, and the exhaust hole 33 communicates with the exhaust port 23. A connector slot is provided at the top of the detection slot 32, and a return spring 34 is fixed in the connector slot.

[0016] A rotating shaft 35 is provided on the left and right side walls of the top of the detection slot 32;

[0017] A rotating metal blade 36 is sleeved on the rotating shaft 35 . The top swinging piece 37 of the rotating metal blade 36 is longer than the bottom swinging piece 38 . One side of the top swinging piece 37 of the rotating metal blade 36 abuts against the return spring 34 .

[0018] The metal wire 39 is passed through the bottom of the detection slot 32 near one side of the slot opening.

[0019] According to a preferred embodiment, the mounting block 31 is made of insulating nylon material.

[0020] According to a preferred embodiment, the top depth of the detection groove 32 is smaller than the bottom depth.

[0021] According to a preferred embodiment, a gap of 2 mm is maintained between the metal wire 39 and the bottom swing piece 38 .

[0022] According to a preferred solution, the metal wires 39 in each group of the detection components 3 are connected to each other.

[0023] According to the preferred embodiment, the gap between the metal wire 39 and the bottom swing piece 38 can reduce the detection reaction time. At the same time, the smaller offset angle can reduce the amount of gas leakage and allow the blade to always maintain contact with the wire.

[0024] The utility model adopts a ventilation pad, a cover, an exhaust groove and a detection component, and utilizes the ventilation hole structure of the product to fill high-pressure gas in a closed space. The high-speed gas leaking in the hole drives the metal blade structure to connect with the energized wire to generate a closed circuit and receives the electrical signal from the PLC to detect whether each punched part has a through hole, thereby realizing the monitoring function of the production process within the line and directly preventing the outflow of defective products during the production process.

[0025] The following will describe in more detail the best embodiments of the present invention in conjunction with the accompanying drawings so that the features and advantages of the present invention can be easily understood. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Shown is a schematic diagram of the three-dimensional structure of the utility model;

[0027] Figure 2 Shown is a schematic cross-sectional view of the present invention for clamping a product to be tested;

[0028] Figure 3 Shown is a schematic diagram of the installation and positioning of the product to be tested on the ventilation pad of the utility model;

[0029] Figure 4 Shown is an enlarged schematic diagram of the three-dimensional structure of the ventilation pad in the present invention;

[0030] Figure 5 Shown is an enlarged schematic diagram of the three-dimensional structure of the cover in the present invention;

[0031] Figure 6 Shown is an enlarged schematic diagram of the three-dimensional structure of the detection component in the present invention;

[0032] Figure 7 Shown is a cross-sectional view of the detection component in the present invention;

[0033] Description of labels

[0034] 1. Ventilation pad; 11. Air inlet; 12. Product positioning groove;

[0035] 2. Cover; 21. Mounting slot; 22. Nitrogen spring; 23. Exhaust port; 24. Exhaust slot; 25. Product placement chamber;

[0036] 3. Detection assembly; 31. Mounting block; 32. Detection slot; 33. Exhaust hole; 34. Return spring; 35. Rotating shaft; 36. Rotating metal blade; 37. Top swing piece; 38. Bottom swing piece; 39. Metal wire; DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the technical solution of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the specific embodiments of the present invention. The same figure marks in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Compared to the embodiments shown in the drawings, feasible embodiments within the scope of protection of the present invention may have fewer components, other components not shown in the drawings, different components, differently arranged components, or differently connected components, etc. In addition, two or more components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.

[0039] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by persons of ordinary skill in the field to which the present invention belongs. The words "first", "second" and similar terms used in the specification and claims of the present utility model patent application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "a" or "an" do not necessarily indicate a quantity limitation. Words such as "include" or "comprising" mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0040] The present invention proposes an in-mold pneumatic leak punching online detection structure for use in the detection process. The present invention does not limit the specifications and structural types of the airbag shell to be detected, but the structure of the ventilation pad 1, cover 2, exhaust groove 24 and detection component 3 is particularly suitable for leak detection of products during mold processing.

[0041] In general, the in-mold pneumatic missing punching online detection structure proposed by the present invention mainly includes: a ventilation pad 1, a cover 2, an exhaust groove 24 and a detection component 3. Figure 1 , which shows the arrangement relationship of the ventilation pad 1, the cover 2, the exhaust groove 24 and the detection component 3.

[0042] The pneumatic punching hole detection structure in the mold proposed by the present invention is set on the mold, wherein the metal wire 39 in the detection component 3 is connected to the PLC controller. The pneumatic punching hole detection structure in the mold proposed by the present invention is used as follows: Figure 2 As shown, the bottom of the product to be tested is placed on the ventilation pad 1, and the pin rod is used to make the groove at the bottom of the product flush with the product positioning groove 12. The top of the product to be tested is stuck in the product placement cavity 25. Under the action of the nitrogen spring 22, the product to be tested and the ventilation pad 1 are always kept in contact. The high-pressure airflow enters the interior of the product from the air inlet 11, is discharged from the vents around the product into the corresponding exhaust port 23 in the cover 2, and is blown out from the exhaust hole 33 to drive the bottom of the rotating metal blade 36 to swing outward. When the bottom swing piece 38 contacts the metal wire 39, a switch closed circuit is formed and the PLC controller obtains information on whether all the vents on the product are opened through electrical signals, thereby realizing the monitoring function of the production process within the line and directly preventing the outflow of defective products during the production process.

[0043] An air inlet hole 11 is provided in the center of the ventilation pad 1, and a pipe thread is provided in the air inlet hole 11. A trachea joint is connected to the air inlet hole 11 through threaded cooperation, and high-pressure gas is introduced into the trachea joint. The pressure of the high-pressure gas needs to reach 0.45-0.6Mpa. The air inlet hole statistics are calculated according to the volume of the inner cavity of the part and the number and area of ​​the air outlet holes. The air outlet speed must reach 100mm / s to ensure that the rotating metal blade 36 can be driven to rotate by the airflow.

[0044] The center of the bottom of the above-mentioned cover shell 2 is a product placement chamber 25, and the center of the top of the product placement chamber 25 is provided with a mounting groove 21. A nitrogen spring 22 is mounted in the mounting groove 21. The nitrogen spring 22 gives a downward force to the product to be tested so that the bottom of the product to be tested presses against the ventilation pad 1, which can ensure that the product is always in contact with the ventilation pad and thus maintains a relatively closed state, so that the high-pressure gas can only be ejected at high speed from the stamping vent holes around the product to prevent the product to be tested from being lifted by the high-pressure airflow and causing leakage during testing. There are equidistant holes on the outer walls around the bottom of the cover shell 2. The exhaust port 23, exhaust port 23, and exhaust hole 33 corresponding to the vent hole on the product need to have a slightly larger aperture than the vent holes around the product, which can solve the airflow difference caused by a small offset of the parts. The exhaust groove 24 is opened on the side of the exhaust port 23 close to the placement cavity. The exhaust grooves 24 are opened on the inner wall around the placement cavity at equal intervals. The top and bottom of the exhaust grooves 24 vertically penetrate the inner wall of the placement cavity and extend outward. The purpose of opening the exhaust grooves 24 is to provide an exhaust groove in the upper and lower directions to reduce the direct influence of adjacent holes and avoid the influence of airflow from adjacent holes.

[0045] The above-mentioned multiple groups of detection components 3 are arranged on the outer wall of the cover 2 at equal intervals through bolt connection. The detection component 3 includes: a mounting block 31, a rotating shaft 35, a return spring 34, a rotating metal blade 36 and a metal wire 39, wherein the mounting block 31 is arranged on the outer wall of the cover 2 at equal intervals through bolt connection. A detection groove 32 is opened in the middle of the side of the mounting block 31 away from the cover 2, and an exhaust hole 33 is opened at the bottom of the detection groove 32. The exhaust hole 33 is connected to the exhaust port 23 on the cover 2. The ventilation area of ​​the exhaust hole 33 is half of the exhaust port 23. The air flow velocity is provided by reducing the area, thereby increasing the aerodynamic force acting on the metal blade. A connector groove is opened at the top of the detection groove 32, and a return spring 34 is clamped in the connector groove. The rotating shaft 3 is passed through the left and right side walls of the top of the detection groove 32. 5. A rotating metal blade 36 is sleeved on the rotating shaft 35. The length of the top swing piece 37 in the rotating metal blade 36 is greater than that of the bottom swing piece 38. One side of the top swing piece 37 in the rotating metal blade 36 is against the reset spring 34. A metal wire 39 is passed through the side of the bottom of the detection slot 32 near the slot. A gap of 2 mm is maintained between the metal wire 39 and the bottom swing piece 38, which can reduce the reaction time of the detection. At the same time, the smaller offset angle formed can reduce the amount of gas leakage and allow the bottom swing piece 38 to always maintain contact with the metal wire 39. The metal wires 39 in each group of detection components 3 are interconnected to form a circuit to be closed. When the airflow in the exhaust hole 33 blows the rotating metal blade 36 to swing and contact the metal wire on this component, a switch closed circuit can be formed.

[0046] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed in the present invention are intended to be covered by the claims of the present invention.

Claims

1. An in-mold pneumatic missed punching online detection structure, characterized in that: include: A ventilation pad (1), wherein an air inlet hole (11) is provided in the middle of the ventilation pad (1); A cover shell (2), wherein a product placement cavity (25) is provided in the center of the bottom of the cover shell (2), a mounting groove (21) is provided in the center of the top of the product placement cavity (25), a nitrogen spring (22) is mounted in the mounting groove (21), and exhaust ports (23) corresponding to the vent holes on the product are provided at equal intervals on the outer side walls around the bottom of the cover shell (2); An exhaust groove (24), the exhaust groove (24) is provided on one side of the exhaust port (23) close to the product placement cavity (25), and the exhaust grooves (24) are provided at equal intervals on the inner side wall around the product placement cavity (25); Detection components (3), wherein the detection components (3) are provided in multiple groups, and the multiple groups of detection components (3) are connected by bolts and are arranged around the outer wall of the cover shell (2) at equal intervals.

2. The in-mold pneumatic missed punching online detection structure according to claim 1, characterized in that: Product positioning grooves (12) are provided around the top of the ventilation pad (1).

3. The in-mold pneumatic missed punching online detection structure according to claim 2, characterized in that: The top and bottom of the exhaust groove (24) vertically penetrate the inner wall of the product placement cavity (25) and extend outward.

4. The in-mold pneumatic missed punching online detection structure according to claim 3, characterized in that: The detection component (3) comprises: A mounting block (31) is provided on the outer side walls of the housing (2) at equal intervals by bolt connection. A detection groove (32) is provided in the center of a side of the mounting block (31) away from the housing (2). An exhaust hole (33) is provided at the bottom of the detection groove (32). The exhaust hole (33) is communicated with the exhaust port (23). A connector groove is provided at the top of the detection groove (32). A reset spring (34) is provided in the connector groove. A rotating shaft (35), the rotating shaft (35) is provided on the left and right side walls of the top of the detection slot (32); A rotating metal blade (36), wherein the middle of the rotating metal blade (36) is sleeved on the rotating shaft (35), the length of the top swing piece (37) of the rotating metal blade (36) is greater than the length of the bottom swing piece (38), and one side of the top swing piece (37) of the rotating metal blade (36) abuts against the return spring (34); A metal wire (39) is passed through a side of the bottom of the detection slot (32) close to the slot opening.

5. The in-mold pneumatic missed punching online detection structure according to claim 4, characterized in that: The top groove depth of the detection groove (32) is smaller than the bottom groove depth.

6. The in-mold pneumatic missed punching online detection structure according to claim 5, characterized in that: A gap of 2 mm is maintained between the metal wire (39) and the bottom swing piece (38).

7. The in-mold pneumatic missed punching online detection structure according to claim 6, characterized in that: The metal wires (39) in each group of the detection components (3) are connected to each other.

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