Automatic scrap blowing device for injection molding

Abstract

The utility model relates to the field of injection molding, and discloses an automatic scrap blowing device for injection molding, the automatic scrap blowing device comprises an exhaust system and an air supply system, the exhaust system comprises an air blowing pipe, and the air blowing pipe is provided with an air blowing hole facing a lower mold; the air supply system comprises a compressed air source and an air pipe, the compressed air source provides compressed air for the air pipe, the air pipe sleeves one end of the air blowing pipe, when the injection molding machine is closed, the compressed air source provides the compressed air for the air pipe, the air pipe sleeves one end of the air blowing pipe, and the compressed air is blown out from the air blowing hole to clean chippings existing on the surface of the lower mold. However, in the prior art, no device for effectively cleaning the scraps on the surface of the lower mold in time exists, so that the scraps on the surface of the lower mold are cleaned, and the quality of the surface of an injection product is improved.

Description

Technical Field

[0001] The present application relates to the field of injection molding, and in particular to an automatic chip blowing device for injection molding. Background Art

[0002] Injection molds are widely used in industrial production, primarily for manufacturing various plastic products. With the increasing demand for plastic products, the research and development of injection molds has become increasingly important. The quality of injection molds directly impacts product quality and production efficiency. Therefore, the smoother the mold cavity surface and the less debris, the better the injection molding results.

[0003] Most existing injection molding molds consist of an upper mold and a lower mold. When the upper and lower molds of the injection mold are closed, if the debris on the surface of the lower mold is not cleaned in time and production continues, it will cause surface defects when the product is ejected from the mold, thereby affecting the quality of the product. Utility Model Content

[0004] In order to clean the debris on the surface of the lower mold during injection molding, an automatic chip blowing device for injection molding is provided.

[0005] The automatic chip blowing device for injection molding includes an exhaust system and an air supply system. The exhaust system includes an air blowing pipe, and the air blowing pipe is provided with an air blowing hole facing the lower mold; the air supply system includes a compressed air source and an air pipe, and the compressed air source provides compressed air to the air pipe, and the air pipe is sleeved on one end of the air blowing pipe; the air supply system also includes an electric air valve, one end of the electric air valve is connected to the air pipe, and the other end is connected to the compressed air source, and the electric air valve is connected to the electrical signal of the injection molding machine.

[0006] By adopting the above technical solution, when the injection molding machine closes the mold, the compressed air source provides compressed air to the air pipe, the air pipe is connected to the outside of one end of the blow pipe, and the compressed air is blown to the blow pipe. At the same time, the blow pipe is provided with a blowing hole facing the lower mold to clean the debris on the surface of the lower mold. However, there is no device for timely and effective cleaning of the debris on the surface of the lower mold in the existing technology. It can be seen that the present application cleans the debris on the surface of the lower mold and improves the quality of the surface of the injection molded product.

[0007] Optionally, the exhaust system also includes an adjustment mechanism, which includes an adjustment block and an adjustment bolt. A rotating hole is opened on the adjustment block, and a fixed threaded hole is opened on the side of the adjustment block. The adjustment bolt is threadedly connected to the fixed threaded hole, and one end of the adjustment bolt is inserted into the rotating hole; the air blowing pipe is inserted into the rotating hole, and the side wall of the air blowing pipe is fixed by the adjusting bolt.

[0008] Through the above technical solution, by loosening the adjusting bolt and rotating the air blowing pipe, the direction of the compressed air blowing out of the air blowing hole can be adjusted to avoid debris that cannot be cleaned on the surface of the lower mold.

[0009] Optionally, there are multiple adjustment blocks, and the air blowing pipe passes through all the adjustment blocks axially and horizontally.

[0010] Through the above technical solution, the blowing pipe coaxially passes through all the adjustment blocks, the blowing pipe is located in a horizontal state, and the compressed air can be evenly blown to the surface of the lower mold from the blowing hole.

[0011] Optionally, the exhaust system also includes an adjustment mechanism, which includes an adjustment seat. There are multiple adjustment seats, and the adjustment seats are fixed to the side of the upper mold. A limiting groove is also provided on the adjustment seat, and the groove opening of the limiting groove is directed upward; the blowing pipe is placed on the limiting groove and contacts the groove wall of the limiting groove.

[0012] By adopting the above technical solution, the air blowing pipe is inserted into the limiting groove, and the air blowing pipe can be directly rotated to adjust the direction of the compressed air blowing out of the air blowing hole, which reduces additional operations and improves convenience.

[0013] Optionally, a plurality of limiting grooves are formed on the adjustment seat, and the limiting grooves at the same height form a group, and the air blowing pipe passes through a group of limiting grooves.

[0014] By adopting the above technical solution, a plurality of limit slots are opened on the adjustment seat, and the air blowing pipe is adjusted in the limit slots of different groups to adjust the angle of the compressed air blown out of the air hole, thereby improving applicability.

[0015] Optionally, the adjustment mechanism also includes a fixing component, which includes a fixing seat and a fixing strip. The fixing seat is fixed to the adjustment seat, and the fixing strip presses the side wall of the blowing tube from top to bottom. A fixing spring is connected between the fixing seat and the adjustment seat, and the fixing spring is in a compressed state.

[0016] By adopting the above technical solution, a fixing spring is added to connect the fixing seat and the fixing strip, and the fixing spring is in a compressed state. The fixing spring will reset to push the fixing strip to low-pressure contact with the side wall of the blowing pipe.

[0017] Optionally, a rubber strip is further installed on one side of the fixing strip that abuts against the air blowing pipe.

[0018] By adopting the above technical solution and adding a rubber strip, the contact between the rubber and the metal is tightened, thus preventing the fixing strip from loosening when it hits the top.

[0019] Optionally, the fixing seat further includes a handle, one end of which passes through the fixing seat and is connected to the fixing bar.

[0020] By adopting the above technical solution, when replacing the limit grooves of the air blow pipe, the handle can be lifted, and the handle drives the fixing bar to move toward the fixing seat, making it convenient to replace different groups of limit grooves of the air blow pipe.

[0021] In view of the deficiencies in the existing technology, in summary, the present invention has the following beneficial effects.

[0022] 1. When the injection molding machine closes the mold, the electric valve receives the electrical signal from the injection molding machine, opens the electric valve, and the compressed air pump provides compressed air to the air pipe. The compressed air is blown out from the blowing holes on the side of the air pipe to blow away the debris on the surface of the lower mold during injection molding; when the injection molding machine opens the mold, the electric valve receives the electrical signal from the injection molding machine, closes the electric valve, and blocks the compressed air from blowing into the air pipe. Therefore, the electric valve switches the ventilation state of the air pipe as the injection molding machine opens and closes the mold, thereby realizing an automatic chip blowing function.

[0023] 2. The direction of the air blow pipe can be adjusted to change the direction of the compressed air blowing, avoiding the debris on the surface of the lower mold from being cleaned, thereby improving applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is an exploded diagram of an automatic chip blowing device for injection molding;

[0025] Figure 2 The exploded diagram of the regulating mechanism;

[0026] Figure 3 Schematic diagram of the structure of the air blowing pipe;

[0027] Figure 4 This is a structural diagram of the automatic chip blowing device of Example 2;

[0028] Figure 5 This is a partial enlarged view of the improved adjustment mechanism;

[0029] Figure 6 It is a structural diagram of an improved regulating mechanism;

[0030] Figure 7 It is a structural diagram between the air supply system and the exhaust system.

[0031] Figure markings: 1. Upper mold; 2. Lower mold; 3. Exhaust system; 31. Adjustment mechanism; 311. Adjustment block; 3111. Rotation hole; 3112. Fixed threaded hole; 312. Adjustment bolt; 313. Adjustment seat; 3131. Limiting groove; 314. Fixing assembly; 3141. Fixing seat; 3142. Fixing strip; 3142-1. Rubber strip; 3143. Fixing spring; 3144. Handle; 32. Blowing pipe; 321. Blowing hole; 322. Air inlet end; 4. Air supply system; 41. Air pipe; 42. Electric air valve; 43. Compressed air source; 5. Connecting parts. DETAILED DESCRIPTION

[0032] The following is a further detailed description with reference to the accompanying drawings:

[0033] Example 1

[0034] As attached Figure 1 As shown, the automatic chip blowing device for injection molding includes an exhaust system 3, an air supply system 4 and a connecting part 5.

[0035] The exhaust system 3 is installed on the upper mold 1 of the mold, and includes an adjustment mechanism 31 and a blowing pipe 32.

[0036] As attached Figure 2 and attached Figure 3 As shown, the adjustment mechanism 31 includes two adjustment blocks 311 and two adjustment bolts 312. The adjustment blocks 311 are fixed to the side of the upper mold 1. The two adjustment blocks 311 have rotation holes 3111 formed therein. The sides of the two adjustment blocks 311 also have fixed threaded holes 3112 formed therein, one end of which communicates with the rotation holes 3111. The adjustment bolts 312 are threadedly connected to the fixed threaded holes 3112, and one end of the adjustment bolts 312 is inserted into the rotation holes 3111.

[0037] The ends of the air pipe 32 are inserted axially and horizontally into the rotation hole 3111, and the side walls of the air pipe 32 are fixed by the adjusting bolts 312. The air pipe 32 is closed at one end and open at the other. The open end is referred to herein as the air inlet end 322. The air pipe 32 is also provided with air holes 321 on its side, evenly spaced along the axis of the air pipe 32. By loosening the adjusting bolts 312, the air pipe 32 can be rotated to adjust the orientation of the air holes 321.

[0038] As attached Figure 7 As shown, the air supply system 4 includes an air pipe 41, an electric air valve 42, and a compressed air source 43 connected in sequence.

[0039] One end of the air pipe 41 is sleeved on the outside of the blowing pipe 32 and is connected through a connecting piece 5. Here, the air pipe 41 is a rubber hose, and the actual connection depends on the situation. Here, the connecting piece 5 is selected as a clamp, which is sleeved on the outside of the air pipe 41 and holds the air pipe 41 from the outside to the inside, making it easy to disassemble while improving the air tightness of the connection between the air pipe 41 and the blowing pipe 32.

[0040] The other end of the air pipe 41 is sleeved on one end of the electric air valve 42, and the electric air valve 42 is connected to the electrical signal of the injection molding machine. When the mold is opened, the electric air valve 42 receives an electrical signal to open, and when the mold is closed, the electric air valve 42 receives an electrical signal to close. Therefore, the electric air valve 42 switches the ventilation state of the air pipe 41 as the injection molding machine opens and closes the mold, making operation and control more convenient.

[0041] The compressed air source 43 is a compressed air tank or a compressed air pump, which is a compressed air pump in this case, connected to the electric air valve 42 to provide compressed air to the air pipe 41 .

[0042] The usage of this embodiment 1 is as follows:

[0043] Before starting the injection molding machine, insert the air blowing pipe 32 into the rotating holes 3111 on the adjusting block 311 and axially pass through all the rotating holes 3111. At the same time, align the air blowing holes 321 evenly distributed on the side of the air blowing pipe 32 with the surface of the lower mold 2. Rotate the two adjusting bolts 312 on the side of the adjusting block 311 until the adjusting bolts 312 press against the side wall of the air blowing pipe 32 to fix the position of the air blowing pipe 32.

[0044] One end of the air pipe 41 is sleeved on the open end of the air blowing pipe 32, and then a clamp is put on the outside of the air pipe 41 to hold the air pipe 41 from the outside to the inside; the other end of the air pipe 41 is connected to the electric air valve 42, and the compressed air pump is turned on; when the injection molding machine opens the mold, the electric air valve 42 receives the electrical signal of the injection molding machine, opens the electric air valve 42, and the compressed air pump provides compressed air to the air pipe 41, and the compressed air is blown out from the air hole 321 on the side of the air blowing pipe 32 to blow away the debris on the surface of the lower mold 2 during injection molding; when the injection molding machine closes the mold, the electric air valve 42 receives the electrical signal of the injection molding machine, closes the electric air valve 42, and blocks the compressed air from blowing into the air pipe 41. Therefore, the electric air valve 42 switches the ventilation state of the air pipe 41 as the injection molding machine opens and closes the mold, thereby realizing an automatic chip blowing function.

[0045] The advantage of the first embodiment is that the direction of the compressed air blown out of the blowing hole 321 can be adjusted by loosening the two adjusting bolts 312 on the side of the adjusting block 311 and rotating the blowing pipe 32, so as to clean the debris on the surface of the lower mold 2 in multiple directions.

[0046] Example 2

[0047] The automatic chip blowing device for injection molding is improved on the basis of Example 1 with respect to the adjustment mechanism 31 .

[0048] As attached Figure 3 and attached Figure 4 As shown, the new adjustment mechanism 31 is fixed to the side of the upper mold 1, including two adjustment seats 313. The adjustment seats 313 are further provided with a plurality of limiting grooves 3131 on the upper side, and the limiting grooves 3131 at the same height are grouped together.

[0049] Both ends of the air blowing pipe 32 are inserted into the same set of limiting grooves 3131, and the side walls of the air blowing pipe 32 are in contact with the groove walls of the limiting grooves 3131; one end of the air blowing pipe 32 is closed and the other end is open, and the open end is recorded here as the air inlet end 322. At the same time, air blowing holes 321 are opened on the side of the air blowing pipe 32, and the air blowing holes 321 are evenly spaced along the axial direction of the air blowing pipe 32.

[0050] As attached Figure 4 and attached Figure 5As shown, the adjustment mechanism 31 also includes a fixing assembly 314 , the number of which is equal to the number of the adjustment seats 313 and is located above the adjustment seats 313 . The fixing assembly 314 includes a fixing seat 3141 , a fixing bar 3142 , a fixing spring 3143 and a handle 3144 .

[0051] The fixing seat 3141 is fixed to the adjusting seat 313. A handle 3144 is also provided on the fixing seat 3141. One end of the handle 3144 passes through the fixing seat 3141 and is connected to the fixing bar 3142. By lifting the handle 3144 on the fixing seat 3141, the fixing bar 3142 can be pulled toward the fixing seat 3141. The fixing bar 3142 is separated from the adjusting seat 313, making it convenient for the blowing tube 32 to replace different groups of limit slots 3131.

[0052] As attached Figure 5 and attached Figure 6 As shown, a rubber strip 3142-1 is installed on one side of the fixing strip 3142, and one side of the rubber strip 3142-1 presses against the side wall of the blowing tube 32, thereby limiting the shaking of the blowing tube 32 when the upper mold 1 of the injection molding machine moves; the fixing strip 3142 presses against the side wall of the blowing tube 32 from top to bottom, and a fixing spring 3143 is connected between the fixing seat 3141 and the adjusting seat 313, and the fixing spring 3143 is in a compressed state. When the fixing spring 3143 is reset, it can push the fixing strip 3142 to press against the side wall of the blowing tube 32.

[0053] The usage of this embodiment 2 is as follows:

[0054] Before starting the injection molding machine, lift the handle 3144 on the fixing seat 3141, and the handle 3144 pulls the fixing strip 3142 toward the fixing seat 3141, insert the blowing pipe 32 into the limiting groove 3131 of the same group, and lower the handle 3144 on the fixing seat 3141; the fixing spring 3143 between the fixing seat 3141 and the fixing strip 3142 is reset, pushing the fixing strip 3142 toward the adjustment seat 313, and one side of the rubber strip 3142-1 of the fixing strip 3142 presses against the side wall of the blowing pipe 32 to fix the position of the blowing pipe 32.

[0055] One end of the air pipe 41 is sleeved on the open end of the air blowing pipe 32, and then a clamp is put on the outside of the air pipe 41 to hold the air pipe 41 from the outside to the inside; the other end of the air pipe 41 is connected to the electric air valve 42, and the compressed air pump is turned on; when the injection molding machine opens the mold, the electric air valve 42 receives the electrical signal of the injection molding machine, opens the electric air valve 42, and the compressed air pump provides compressed air to the air pipe 41, and the compressed air is blown out from the air hole 321 on the side of the air blowing pipe 32 to blow away the debris on the surface of the lower mold 2 during injection molding; when the injection molding machine closes the mold, the electric air valve 42 receives the electrical signal of the injection molding machine, closes the electric air valve 42, and blocks the compressed air from blowing into the air pipe 41. Therefore, the electric air valve 42 switches the ventilation state of the air pipe 41 as the injection molding machine opens and closes the mold, thereby realizing an automatic chip blowing function.

[0056] The advantage of the second embodiment is that a plurality of limiting grooves 3131 are provided on the adjustment seat 313, and the air blowing pipe 32 can be inserted into different groups of limiting grooves 3131, so as to adjust the air blowing pipe 32 to blow out compressed air at different angles, thereby cleaning debris on the surface of the lower mold 2 from multiple angles; when the direction of the air blowing pipe 32 needs to be adjusted, it is only necessary to slightly lift the handle 3144 on the fixed seat 3141 and rotate the direction of the air blowing pipe 32 to adjust the direction in which the compressed air is blown out from the air hole 321, thereby cleaning debris on the surface of the lower mold 2 from multiple directions.

[0057] To sum up, the improved advantage of the second embodiment is that when the direction of the blowing tube 32 needs to be adjusted, there is no need to rotate the adjusting bolt 312, and only the handle 3144 needs to be lifted, which improves convenience; at the same time, the adjustment seat 313 in the second embodiment is provided with multiple sets of limit grooves 3131, which can adjust the angle of the blowing tube 32 while adjusting the direction of the blowing tube 32, thereby improving applicability.

[0058] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but as long as they are within the scope of protection required by this application, they are protected by patent law.

Claims

1. Automatic chip blowing device for injection molding, characterized in that: The invention comprises an exhaust system (3) and an air supply system (4), wherein the exhaust system (3) comprises an air blowing pipe (32), and the air blowing pipe (32) is provided with an air blowing hole (321) facing the lower mold (2); the air supply system (4) comprises a compressed air source (43) and an air pipe (41), wherein the compressed air source (43) provides compressed air to the air pipe (41), and the air pipe (41) is sleeved on one end of the air blowing pipe (32); the air supply system (4) further comprises an electric air valve (42), wherein one end of the electric air valve (42) is connected to the air pipe (41), and the other end is connected to the compressed air source (43), and the electric air valve (42) is connected to the electrical signal of the injection molding machine.

2. The automatic chip blowing device for injection molding according to claim 1, characterized in that: The exhaust system (3) further comprises an adjusting mechanism (31), the adjusting mechanism (31) comprising an adjusting block (311) and an adjusting bolt (312), the adjusting block (311) being provided with a rotation hole (3111), the side of the adjusting block (311) being provided with a fixing threaded hole (3112), the adjusting bolt (312) being threadedly connected to the fixing threaded hole (3112), and one end of the adjusting bolt (312) being inserted into the rotation hole (3111); the air blowing pipe (32) being inserted into the rotation hole (3111), and the side wall of the air blowing pipe (32) being fixed by the adjusting bolt (312).

3. The automatic chip blowing device for injection molding according to claim 2, characterized in that: There are multiple regulating blocks (311), and the air blowing pipe (32) passes through all the regulating blocks (311) axially and horizontally.

4. The automatic chip blowing device for injection molding according to claim 1, characterized in that: The exhaust system (3) further comprises an adjusting mechanism (31), the adjusting mechanism (31) comprising an adjusting seat (313), a plurality of the adjusting seats (313), and the adjusting seats (313) are fixed to the side of the upper mold (1), and a limiting groove (3131) is further provided on the adjusting seat (313), and the groove opening of the limiting groove (3131) is directed upward; the blowing pipe (32) is placed on the limiting groove (3131) and contacts the groove wall of the limiting groove (3131).

5. The automatic chip blowing device for injection molding according to claim 4, characterized in that: The adjustment seat (313) is provided with a plurality of limiting grooves (3131), and the limiting grooves (3131) at the same height form a group, and the air blowing pipe (32) passes through a group of limiting grooves (3131).

6. The automatic chip blowing device for injection molding according to claim 5, characterized in that: The adjustment mechanism (31) further comprises a fixing assembly (314), the fixing assembly (314) comprising a fixing seat (3141) and a fixing strip (3142), the fixing seat (3141) being fixed to the adjustment seat (313), the fixing strip (3142) pressing the side wall of the blowing pipe (32) from top to bottom, a fixing spring (3143) being connected between the fixing seat (3141) and the adjustment seat (313), the fixing spring (3143) being in a compressed state.

7. The automatic chip blowing device for injection molding according to claim 6, characterized in that: A rubber strip (3142-1) is also installed on one side of the fixing strip (3142) that abuts against the air blowing pipe (32).

8. The automatic chip blowing device for injection molding according to claim 7, characterized in that: The fixing seat (3141) further includes a handle (3144), one end of which passes through the fixing seat (3141) and is connected to the fixing bar (3142).

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