Mold runner processing technology and equipment applied to seven-layer composite heat shrinkable film

Abstract

The application discloses a mold runner machining process and equipment applied to a seven-layer composite heat shrinkable film, and relates to the technical field of mold runner machining. The equipment comprises a machine tool, a machining head and a bearing seat, the bearing seat is arranged on the machine tool and can rotate the mold around the axis of the mold, the machining head is used for drilling the spiral starting end on the outer wall of the mold, a plurality of outer spirals are distributed on the outer side of the mold in a circumferential direction, each outer spiral has a spiral starting end penetrating the mold, and the spiral starting end and the outer spiral jointly form a spiral groove. The device solves the problem that the flanging amount of the spiral starting end is large, which leads to subsequent processing difficulties, reduces the residual flanging and burrs of the spiral starting end aperture, reduces the subsequent manual polishing or fine grinding requirements, reduces the number of times of reciprocating insertion of the machining head, and improves the machining quality and machining efficiency of the spiral starting end of the mold runner.

Description

Technical Field

[0001] This invention relates to the field of mold processing technology, and more specifically, to a mold flow channel processing technology and equipment for seven-layer composite heat shrink film. Background Technology

[0002] Seven-layer composite heat shrink film is a high-performance film material commonly used in the packaging industry. The processing quality of the spiral starting end in the mold flow channel directly affects the uniformity of film thickness and mechanical properties.

[0003] Currently, equipment used for processing the flow channels of seven-layer composite heat shrink film molds typically includes a machine tool, a processing head, and a support base. The processing head is used to drill and form the spiral starting end on the outer wall of the mold. Although this equipment can complete the drilling of the spiral starting end, when the drill bit is close to penetrating the inner wall of the mold, the material at the edge of the hole is pushed and flares up. The processing head usually needs to be inserted repeatedly to complete the hole processing, and flares and burrs are still easily left at the hole after processing. The range of flare formation is uncontrolled, the root lacks inner support, and it is easy to have local excessive thickness and random shape. The flares need to be removed manually by the operator afterward, but thicker flares are easily pushed or torn during processing, affecting the quality of the spiral starting end hole edge. At the same time, repeated insertion leads to low processing efficiency and increases auxiliary time. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a mold flow channel processing technology and equipment for seven-layer composite heat shrink film.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A mold flow channel processing device for seven-layer composite heat shrink film includes a machine tool, a processing head, and a support base. The support base is mounted on the machine tool and can support the mold to rotate around its own axis. The processing head is used to drill and form a spiral starting end on the outer wall of the mold. Multiple outer spirals are distributed circumferentially on the outer side of the mold, each outer spiral having a spiral starting end that penetrates the mold. The spiral starting end and the outer spirals together form a spiral channel. The device also includes a support, a rotary table, a drilling processing mechanism, and a post-drilling processing mechanism. The support is mounted on the machine tool; the rotary table is rotatably mounted on the support; the drilling processing mechanism and the post-drilling processing mechanism... The processing mechanism is set on a rotary table, which is used to switch the working positions of the drilling processing mechanism and the post-drilling processing mechanism. The drilling processing mechanism includes a first linear drive unit and an abutment support column. The first linear drive unit is set on the rotary table, and the abutment support column is connected to the first linear drive unit and can approach the inner wall of the mold under the drive of the first linear drive unit. When the abutment support column is in the state of abutting the inner wall of the mold, a reserved space is formed between it and the opening at the starting end of the spiral for the flanging to be generated. The post-drilling processing mechanism is used to cut off the flanging formed after being restricted by the drilling processing mechanism.

[0006] By adopting the above technical solution, when the processing head penetrates the exit of the spiral initiation end, the flange is confined within the reserved space, and the root is supported by the abutment support column, avoiding excessive local thickness and random shape of the flange. After drilling is completed, the flange is in a controllable state, which provides stable conditions for the subsequent drilling post-processing mechanism to remove the flange. Because the flange is confined within the preset space and its shape is stable, the processing head does not need to extend in and out multiple times; usually, only two reciprocations are needed to complete the processing of the spiral initiation end, reducing working time and improving processing efficiency.

[0007] The invention is further configured such that: the drilling processing mechanism includes a connecting plate, a fixing plate, a guide rod, and a first buffer part; the connecting plate is mounted on the first linear drive unit, and the abutting support column is slidably connected to the connecting plate; the fixing plate is disposed on the outside of the abutting support column; there are two guide rods, which are respectively disposed on both sides of the abutting support column, and the guide rods pass through the fixing plate and are clearance-fitted with the connecting plate; there are two first buffer parts, which are respectively sleeved on the outside of the guide rods, and when the abutting surface of the abutting support column abuts against the inner wall of the mold, the abutting support column can move relative to the connecting plate and compress the first buffer parts.

[0008] The invention is further configured such that: the abutting surface of the abutting support column is adapted to the inner side of the mold, and the abutting surface has a chamfered structure; the abutting surface of the abutting support column is provided with a reserved space for limiting the formation of the flange, the diameter of the reserved space is slightly larger than the diameter of the starting end of the spiral, and the flange is formed into a controllable flange after being limited by the reserved space.

[0009] The present invention is further configured such that: a first chip discharge port and a second chip discharge port are provided on the outer side of the abutting support column; the first chip discharge port is arranged in a circumferential array along the outer side of the abutting support column and there are multiple of them; the second chip discharge port is opened on the outer side of the abutting support column and faces downward; both the first chip discharge port and the second chip discharge port are connected to the reserved space and are used to discharge chips when the processing head extends into the inner side of the abutting support column.

[0010] The present invention is further configured such that: the post-drilling processing mechanism includes a second linear drive unit, a connector, an abutment limiting guide sleeve, and a rotary cutting component; the second linear drive unit is disposed on a rotary table and close to the first linear drive unit; the connector is fixedly connected to the second linear drive unit; the abutment limiting guide sleeve is disposed on the connector; the rotary cutting component is rotatably disposed on the connector and located inside the abutment limiting guide sleeve, and the outer side of the rotary cutting component has two vertically arranged triangular cutting structures.

[0011] The present invention is further configured such that: the abutting and limiting guide sleeve has a contact surface that abuts against the inner wall of the mold, the contact surface is adapted to the inner wall of the mold, and the contact surface has an opening slightly larger than the diameter of the spiral starting end; the abutting and limiting guide sleeve has a first outlet and a second outlet on its outer side, the first outlet is arranged in a circumferential array along the outer side of the abutting and limiting guide sleeve, and the second outlet is opened vertically on the outer side of the abutting and limiting guide sleeve.

[0012] The present invention is further configured such that: the post-drilling processing mechanism also includes a fixing ring, a limiting rod, and a second buffer part; the fixing ring is disposed on the outside of the abutting limiting guide sleeve, the limiting rod is disposed on one side of the abutting limiting guide sleeve and is in clearance fit with the fixing ring, the second buffer part is sleeved on the outside of the limiting rod, and the two ends of the second buffer part abut against the end faces of the abutting limiting guide sleeve and the fixing ring, respectively.

[0013] The present invention is further configured such that: when the abutting and limiting guide sleeve abuts against the inner wall of the mold, the abutting and limiting guide sleeve first contacts the inner wall of the mold and drives the second buffer part to compress through the limiting rod; the outer diameter of the rotating cutting part is adapted to the inner diameter of the opening of the abutting and limiting guide sleeve, so that the rotating cutting part keeps in contact with the inner wall of the opening when it rotates.

[0014] The invention is further configured such that: the rotary cutting component also includes a fine grinding column; the fine grinding column is disposed on one side of the rotary cutting component; when the rotary cutting component is driven by the second linear drive unit to gradually cut off the inner flange of the opening, the fine grinding column first extends into the inner wall of the spiral starting end and rotates, and a chip removal distance is left between the fine grinding column and the rotary cutting component; when the rotary cutting component completes the cutting and moves away from the mold under the drive of the second linear drive unit, the fine grinding column carries out the residual waste chips in the spiral starting end.

[0015] By adopting the above technical solution, the outer diameter of the rotating cutting part is matched with the inner diameter of the opening of the abutment limiting guide sleeve. When the rotating cutting part rotates, it keeps in contact with the inner wall of the opening, so that the cutting range of the tool is limited to the opening. This avoids local overcutting or undercutting caused by the radial runout of the tool, improves the integrity and uniformity of the flanging cutting, and reduces the damage to the source material of the hole.

[0016] A mold runner processing technology, using the mold runner processing equipment for seven-layer composite heat shrink film as described above, includes the following steps: S1. Place the mold on the support seat. The rotary table switches the drilling processing mechanism to the working position. The first linear drive unit drives the abutment support column to move towards the inner wall of the mold, so that the abutment support column abuts against the outside of the spiral starting end hole and forms a flanged reserved space between the abutment support column and the spiral starting end hole. The processing head drills to form the spiral starting end on the outer wall of the mold. When it is close to penetrating the inner wall of the mold, the material forms a flange in the flanged reserved space. The abutment support column restricts the root of the flange, so that the flange shape is controllable. The processing head only needs to reciprocate twice to complete the processing of the spiral starting end.

[0017] S2. The rotary table switches the post-drilling processing mechanism to the working position. The second linear drive unit drives the abutment limiting guide sleeve to contact the inner wall of the mold. The abutment limiting guide sleeve compresses the second buffer part to form a flexible fit. The rotating cutting part rotates inside the abutment limiting guide sleeve. The outer diameter of the rotating cutting part keeps in contact with the inner wall of the opening of the abutment limiting guide sleeve. The rotating cutting part gradually approaches the flange while rotating. The two triangular cutting structures on its outer side intermittently shear the flange. At the same time, the fine grinding column extends into the inner wall of the spiral starting end before the rotating cutting part and rotates. There is a chip removal distance between the fine grinding column and the rotating cutting part.

[0018] S3. After the rotary cutting part completes the flanging cutting, the second linear drive unit drives the rotary cutting part and the fine grinding column away from the mold. The fine grinding column carries out the residual waste in the spiral starting end with the withdrawal action, completing the processing of the spiral starting end.

[0019] In summary, this application includes at least one of the following beneficial technical effects: By incorporating a drilling mechanism, the support column moves closer to the inner wall of the mold. After the support column abuts against the outside of the spiral starting end orifice, a reserved space is formed between it and the spiral starting end orifice for flanging. Thus, when the processing head penetrates the spiral starting end outlet, the flanging is confined within the reserved space, and the root is supported by the support column, preventing excessive local thickness and random shape of the flanging. After drilling is completed, the flanging is in a controllable state, providing stable conditions for the subsequent post-drilling processing mechanism to remove the flanging.

[0020] By setting up a post-drilling processing mechanism, the outer diameter of the rotating cutting part is matched with the inner diameter of the opening of the abutment limiting guide sleeve. During rotation, the rotating cutting part remains in contact with the inner wall of the opening, limiting the cutting range of the tool to within the opening. This avoids local overcutting or undercutting caused by radial runout of the tool, improving the integrity and uniformity of the flanging removal, while reducing damage to the base material at the hole opening. When the rotating cutting part completes its cutting and moves away from the mold under the drive of the second linear drive unit, the fine grinding column retracts accordingly. Utilizing the friction and guiding effect between its outer circle and the inner wall of the spiral starting end, it removes the residual debris from the spiral starting end, preventing debris residue from affecting the cleanliness of the hole. The fine grinding column also serves as an auxiliary positioning and cleaning tool. This achieves machining of the spiral starting end without the need for subsequent manual grinding and fine grinding operations. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the mold flow channel processing equipment for a seven-layer composite heat shrink film according to the present invention. Figure 2 for Figure 1 A front view of the structure; Figure 3 This is a three-dimensional structural diagram of the mold, outer spiral, and spiral starting end of the present invention; Figure 4 This is a three-dimensional structural diagram of the support base of the present invention; Figure 5 This is a top-view perspective view of the support structure of the present invention; Figure 6 This is a three-dimensional structural diagram of the drilling processing mechanism of the present invention; Figure 7 This is a three-dimensional structural diagram of the abutment support column of the present invention; Figure 8 This is a three-dimensional cross-sectional view of the abutting support column of the present invention in the state of abutting against the inner wall of the mold; Figure 9 for Figure 8 Enlarged structural diagram at point A in the middle; Figure 10 This is a side cross-sectional view of the spiral starting end flanging state and the spiral starting end controllable flanging state in the mold processing of the present invention. Figure 11 This is a three-dimensional structural diagram of the post-drilling processing mechanism of the present invention; Figure 12 for Figure 11 Enlarged structural diagram at point B; Figure 13 This is a three-dimensional cross-sectional view of the abutment limiting guide sleeve of the present invention in contact with the inner wall of the mold. Figure 14 This is a front view of the structure of the spiral starting end of the present invention, which has tiny burrs on the inner side. Figure 15 for Figure 13 Enlarged structural diagram at point C.

[0022] Explanation of reference numerals in the attached drawings: 1. Machine tool; 2. Machining head; 3. Bearing seat; 31. Servo motor; 4. Support; 5. Rotary table; 6. Drilling processing mechanism; 61. First linear drive unit; 611. Ball slide; 612. Ball screw; 613. Servo drive motor; 62. Abutment support column; 621. First chip discharge port; 622. Second chip discharge port; 63. Connecting plate; 64. Fixing plate; 65. Guide rod; 66. First buffer part; 7. Drilling post-processing mechanism; 71. Second linear drive unit; 72. Connecting piece; 73. Abutment limiting guide sleeve; 731. First discharge port; 732. Second discharge port; 74. Rotary cutting part; 741. Small servo driver; 75. Fixing ring; 76. Limiting rod; 77. Second buffer part; 78. Fine grinding column. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0025] Please see Figures 1-15 The present invention provides the following technical solutions: In Example 1, a mold for a seven-layer composite heat-shrinkable film has multiple outer spirals distributed circumferentially on its outer side. Each outer spiral has a spiral starting end that penetrates the mold, and the spiral starting end and the outer spiral together form a spiral channel. In the prior art, during the drilling of the spiral starting end by the processing head 2 on the outer side of the mold, when it is close to penetrating the inner wall of the mold, the material at the edge of the hole at the spiral starting end on the inner wall of the mold is pushed and forms a flange. This flange is located on the inner wall of the mold around the hole at the spiral starting end. The processing head 2 usually needs to reciprocate multiple times to complete the hole processing, but flanges and burrs are still easily left at the hole after processing. The range of flange formation is uncontrolled, the root lacks inner support, and it is easy to be locally too thick and random in shape. Subsequently, the operator needs to manually remove the flange, but thicker flanges are easily pushed or torn during processing, affecting the quality of the edge of the hole at the spiral starting end.

[0026] The mold flow channel processing equipment for a seven-layer composite heat shrink film in this embodiment includes a machine tool 1, a processing head 2, and a support base 3. The support base 3 is mounted on the machine tool 1 and can support the mold to rotate around its own axis. A rotary motor is provided at the bottom of the support base 3, and the rotary motor drives the support base 3 to rotate around its own axis. In this embodiment, the rotary motor is preferably a servo motor 31. For the specific installation position of the servo motor 31, please refer to [reference needed]. Figure 5 This embodiment also includes a support 4, a rotary table 5, a drilling processing mechanism 6, and a post-drilling processing mechanism 7; the support 4 is disposed on the machine tool 1; the rotary table 5 is rotatably disposed on the support 4; the drilling processing mechanism 6 and the post-drilling processing mechanism 7 are disposed on the rotary table 5, and the rotary table 5 is used to switch the working positions of the drilling processing mechanism 6 and the post-drilling processing mechanism 7; the drilling processing mechanism 6 includes a first linear drive unit 61 and an abutment support column 62; the first linear drive unit 61 is disposed on the rotary table 5, the abutment support column 62 is connected to the first linear drive unit 61, and can approach the inner wall of the mold under the drive of the first linear drive unit 61; when the abutment support column 62 is in the state of abutting the inner wall of the mold, a reserved space for the flanging is formed between it and the opening of the spiral starting end; the post-drilling processing mechanism 7 is used to cut off the flanging formed after being restricted by the drilling processing mechanism 6.

[0027] See Figure 6 and Figure 7The drilling processing mechanism 6 also includes a connecting plate 63, a fixing plate 64, a guide rod 65, a first buffer part 66, and a camera. The connecting plate 63 is mounted on the first linear drive unit 61 and is slidably connected to the support column 62. The fixing plate 64 is located on the outside of the support column 62. There are two guide rods 65, which are located on both sides of the support column 62. The guide rods 65 pass through the fixing plate 64 and are clearance-fitted with the connecting plate 63. There are two first buffer parts 66, which are respectively sleeved on the outside of the guide rods 65. The camera is located on the top of the connecting plate 63 and is preferably a CCD camera. It is used to capture the axial position of the processing head 2 and the position of the processed spiral starting end. Before drilling, the camera captures the axial direction and position of the processing head 2 and transmits the image signal to the control system. The control system drives the bearing seat 3 to rotate so that the position to be processed on the mold is aligned with the axial direction of the processing head 2. After completing the processing of one hole, the camera continues to capture the position of the processed hole and controls the rotary table 5 to rotate, so that the drilling processing mechanism 6 and the post-drilling processing mechanism 7 switch to the next station.

[0028] In this embodiment, the first linear drive unit 61 is driven by a ball slide 611, a ball screw 612, and a servo drive motor 613. The servo drive motor 613 drives the ball screw 612 to rotate, causing the slide to move in a straight line. The connecting plate 63 moves with the slide, causing the abutment support column 62 to approach the inner wall of the mold. When the processing head 2 is in the processing state of the starting end of the spiral, the abutment surface of the abutment support column 62 contacts the inner wall of the mold. Since the abutment support column 62 is slidably connected to the connecting plate 63, and the guide rod 65 is clearance-fitted with the connecting plate 63, the abutment support column 62 generates a floating displacement relative to the connecting plate 63 under the action of contact reaction force, compressing the first buffer part 66 sleeved on the guide rod 65, absorbing the contact impact, avoiding rigid collision damage to the inner wall of the mold, and ensuring that the abutment support column 62 and the inner wall of the mold form a stable fit.

[0029] See Figure 8 The abutment surface of the support column 62 is adapted to the inner surface of the mold, and the abutment surface has a chamfered structure. The abutment surface of the support column 62 has a reserved space for limiting the formation of the flange. The diameter of the reserved space is slightly larger than the diameter of the starting end of the spiral. The flange is controlled by the reserved space to form a controllable flange. Because the abutment surface is adapted to the inner surface of the mold, the support column 62 can fully fit against the inner wall of the mold when in contact, preventing the flange from overflowing from the fitting surface.

[0030] The diameter of the reserved space is slightly larger than the diameter of the starting end of the spiral. This allows the material to form a flange within the reserved space during drilling by machining head 2, while also limiting the size and shape of the flange to prevent it from extending excessively outward or folding inward. The specific flange amount, such as... Figure 10 As shown, the left side represents abnormal border crossing, while the right side represents controllable border crossing.

[0031] See Figure 7 and Figure 8 A first chip removal port 621 and a second chip removal port 622 are provided on the outer side of the abutting support column 62. The first chip removal port 621 is arranged in a circumferential array along the outer side of the abutting support column 62 and there are multiple of them. The second chip removal port 622 is opened on the outer side of the abutting support column 62 and faces downward. Both the first chip removal port 621 and the second chip removal port 622 are connected to the reserved space.

[0032] When the machining head 2 is drilling, the drill bit extends into the reserved space inside the support column 62. The chips and cutting fluid enter the reserved space. The first chip discharge port 621 disperses the chips in a circumferential direction to avoid them accumulating in a certain direction. The second chip discharge port 622 uses gravity to make the chips fall downwards to avoid the chips and cutting fluid accumulating in the reserved space, which would affect the flanging formation and subsequent cutting processes.

[0033] In Example 2, when removing the flange at the outlet of the spiral flow channel's starting hole, a rotary cutter is typically used to cut it directly from the outside of the hole in the inner wall of the mold. However, at this time, there is no support inside the hole, and the root of the flange is suspended. During the cutting process, the flange is prone to deflection, bending, or even being pressed into the hole by axial thrust, resulting in incomplete removal and the formation of a small number of tiny burrs on the outer or inner side of the hole wall. For details on these tiny burrs, please refer to [reference needed]. Figure 14 These residual burrs are hidden in the location and are difficult to clean later, which may affect the cleanliness of the orifice and the flow of the melt.

[0034] See Figure 11 The post-drilling processing mechanism 7 includes a second linear drive unit 71, a connector 72, an abutment limiting guide sleeve 73, a rotary cutting member 74, and a small servo driver 741. The second linear drive unit 71 is mounted on the rotary table 5 and close to the first linear drive unit 61; the connector 72 is fixedly connected to the second linear drive unit 71; the abutment limiting guide sleeve 73 is mounted on the connector 72; the rotary cutting member 74 is rotatably mounted on the connector 72 and is located inside the abutment limiting guide sleeve 73, and the rotary cutting member 74 is driven to rotate by the small servo driver 741 located on one side of the connector 72.

[0035] The outer side of the rotating cutter 74 has two vertically arranged triangular cut structures.

[0036] After the rotary table 5 switches the post-drilling processing mechanism 7 to the working position, the second linear drive unit 71 drives the connecting piece 72 to move towards the inner wall of the mold. The abutment and limiting guide sleeve 73 first contacts the inner wall of the mold to form radial positioning and support. The small servo driver 741 drives the rotary cutting piece 74 to rotate. The two triangular cutting structures rotate with the rotary cutting piece 74 to cut off the controlled flange inside the opening of the abutment and limiting guide sleeve 73. The flange is cut off from the root to avoid the large cutting force generated by cutting the whole circle at the same time and reduce the impact on the thin-walled structure of the mold.

[0037] See Figure 13 and Figure 14 The abutment limiting guide sleeve 73 has a contact surface that abuts against the inner wall of the mold. The contact surface is adapted to the inner wall of the mold, and the contact surface has an opening slightly larger than the diameter of the starting end of the spiral. The abutment limiting guide sleeve 73 has a first outlet 731 and a second outlet 732 on its outer side. The first outlet 731 is arranged in a circumferential array along the outer side of the abutment limiting guide sleeve 73, and the second outlet 732 is opened vertically on the outer side of the abutment limiting guide sleeve 73.

[0038] The contact surface of the guide sleeve 73 is in close contact with the inner wall of the mold, providing a stable radial reference for the rotary cutting part 74; the opening diameter is slightly larger than the diameter of the spiral starting end, allowing the rotary cutting part 74 to enter the opening to cut the flange, while limiting the radial offset of the tool; the first outlet 731 disperses the waste generated by cutting in the circumferential direction, and the second outlet 732 uses gravity to discharge the waste downward, avoiding the accumulation of waste in the guide sleeve and affecting the cutting accuracy.

[0039] See Figure 11 The post-drilling processing mechanism 7 also includes a fixing ring 75, a limiting rod 76, and a second buffer part 77. The fixing ring 75 is disposed on the outside of the abutting limiting guide sleeve 73, the limiting rod 76 is disposed on one side of the abutting limiting guide sleeve 73 and is clearance-fitted with the fixing ring 75, and the second buffer part 77 is sleeved on the outside of the limiting rod 76, with both ends of the second buffer part 77 abutting against the end faces of the abutting limiting guide sleeve 73 and the fixing ring 75, respectively.

[0040] When the abutting and limiting guide sleeve 73 comes into contact with the inner wall of the mold, the guide sleeve is subjected to contact reaction force. Through the gap fit between the limiting rod 76 and the fixing ring 75, a slight movement is generated, and the second buffer part 77 is compressed to absorb the contact impact and avoid rigid collision damage to the inner wall of the mold. At the same time, the guide sleeve and the inner wall form a flexible fit, which not only ensures positioning accuracy but also protects the mold surface.

[0041] At this time, the outer diameter of the rotating cutting part 74 is matched with the inner diameter of the opening of the abutment limiting guide sleeve 73, so that the rotating cutting part 74 keeps in contact with the inner wall of the opening when rotating, and the cutting range is limited to the opening. This avoids local overcutting or missing cutting caused by the radial runout of the tool, improves the integrity and uniformity of the flange cutting, and reduces damage to the source material of the hole.

[0042] In Example 3, during the rotary cutting and flanging process, the waste generated during cutting easily falls into the starting section of the spiral flow channel. Since the starting section of the spiral is a through hole, the waste is not easily discharged naturally with the coolant or chips after entering. The residual waste will affect the cleanliness of the hole and may enter the melt flow channel during subsequent use, affecting the normal use of the mold.

[0043] See Figure 11, Figure 12 and Figure 15 The rotary cutting member 74 also includes a fine grinding column 78, which is disposed on one side of the rotary cutting member 74. When the rotary cutting member 74 is driven by the second linear drive unit 71 to gradually cut the inner flange of the opening, the fine grinding column 78 first extends into the inner wall of the spiral starting end and rotates, with a chip removal distance maintained between the fine grinding column 78 and the rotary cutting member 74. The fine grinding column 78 does not contact the flange when it extends. When the rotary cutting member 74 cuts the flange, the fine grinding column 78 moves synchronously with the rotary cutting member 74. The waste chips generated during cutting enter the chip removal distance between the fine grinding column 78 and the rotary cutting member 74 and are not immediately blocked by the rotary cutting member 74.

[0044] When the rotary cutting part 74 completes the cutting and moves away from the mold under the drive of the second linear drive unit 71, the fine grinding column 78 uses the friction and guiding effect between its outer circle and the inner wall of the spiral starting end to carry out the residual waste in the spiral starting end, which plays an auxiliary positioning and cleaning role, without the need for subsequent manual grinding and fine grinding.

[0045] Example 4: A mold runner processing technology, using the mold runner processing equipment described above for seven-layer composite heat shrink film, includes the following steps: S1. Place the mold on the support seat 3. The rotary table 5 switches the drilling processing mechanism 6 to the working position. The first linear drive unit 61 drives the abutment support column 62 to move towards the inner wall of the mold, so that the abutment support column 62 abuts against the outside of the spiral starting end hole, and a flanged reserved space is formed between the abutment support column 62 and the spiral starting end hole. The processing head 2 drills to form the spiral starting end on the outer wall of the mold. When it is close to penetrating the inner wall of the mold, the material forms a flange in the flanged reserved space. The abutment support column 62 restricts the root of the flange, so that the flange shape is controllable. The processing head 2 only needs to reciprocate twice to complete the processing of the spiral starting end.

[0046] S2, the rotary table 5 switches the drilling post-processing mechanism 7 to the working position, the second linear drive unit 71 drives the abutment limiting guide sleeve 73 to contact the inner wall of the mold, the abutment limiting guide sleeve 73 compresses the second buffer part 77 to form a flexible fit; the rotating cutting part 74 rotates inside the abutment limiting guide sleeve 73, the outer diameter of the rotating cutting part 74 is in contact with the inner wall of the opening of the abutment limiting guide sleeve 73; the rotating cutting part 74 gradually approaches the flange in the rotating state, the two triangular cutting structures on its outer side intermittently shear the flange, at the same time the fine grinding column 78 extends into the inner wall of the spiral starting end before the rotating cutting part 74 and rotates, and there is a chip removal distance between the fine grinding column 78 and the rotating cutting part 74.

[0047] S3. After the rotary cutting part 74 completes the flanging cutting, the second linear drive unit 71 drives the rotary cutting part 74 and the fine grinding column 78 away from the mold. The fine grinding column 78 carries out the residual waste in the spiral starting end with the withdrawal action, completing the processing of the spiral starting end.

[0048] Obviously, the embodiments described above are merely some, not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

Claims

1. A mold flow channel processing device for a seven-layer composite heat shrink film, comprising a machine tool (1), a processing head (2), and a support seat (3), wherein the support seat (3) is disposed on the machine tool (1) and is capable of supporting the mold to rotate around its own axis, and the processing head (2) is used to drill and form a spiral starting end on the outer wall of the mold, characterized in that: Multiple outer spirals are distributed circumferentially on the outer side of the mold. Each outer spiral has a spiral starting end that penetrates the mold. The spiral starting end and the outer spiral together form a spiral channel. It also includes a support (4), a rotary table (5), a drilling processing mechanism (6), and a drilling post-processing mechanism (7). The support (4) is installed on the machine tool (1); The rotating platform (5) is rotatably mounted on the support (4); The drilling processing mechanism (6) and the drilling post-processing mechanism (7) are mounted on a rotary table (5). The rotary table (5) is used to switch the working positions of the drilling processing mechanism (6) and the drilling post-processing mechanism (7). The drilling processing mechanism (6) includes a first linear drive unit (61) and an abutment support column (62). The first linear drive unit (61) is disposed on the rotary table (5), and the support column (62) is connected to the first linear drive unit (61), and can approach the inner wall of the mold under the drive of the first linear drive unit (61); When the abutting support column (62) is in contact with the inner wall of the mold, a reserved space is formed between it and the opening at the starting end of the spiral for the flanging to be generated; The post-drilling processing mechanism (7) is used to remove the flange formed after being restricted by the drilling processing mechanism (6).

2. The mold flow channel processing equipment for a seven-layer composite heat shrink film according to claim 1, characterized in that: The drilling processing mechanism (6) also includes a connecting plate (63), a fixing plate (64), a guide rod (65), and a first buffer part (66); the connecting plate (63) is mounted on the first linear drive unit (61), and the abutting support column (62) is slidably connected to the connecting plate (63); the fixing plate (64) is located on the outside of the abutting support column (62); there are two guide rods (65) and they are located on both sides of the abutting support column (62). The guide rods (65) pass through the fixing plate (64) and are in clearance fit with the connecting plate (63); there are two first buffer parts (66) and they are respectively sleeved on the outside of the guide rods (65). When the abutting surface of the abutting support column (62) abuts against the inner wall of the mold, the abutting support column (62) can move relative to the connecting plate (63) and compress the first buffer part (66).

3. The mold flow channel processing equipment for a seven-layer composite heat shrinkable film according to claim 2, characterized in that: The abutting surface of the abutting support column (62) is adapted to the inner side of the mold, and the abutting surface has a chamfered structure; the abutting surface of the abutting support column (62) is provided with a reserved space for limiting the formation of the flange, the diameter of the reserved space is slightly larger than the diameter of the starting end of the spiral, and the flange is formed by limiting the flange through the reserved space.

4. The mold flow channel processing equipment for a seven-layer composite heat shrinkable film according to claim 3, characterized in that: A first chip discharge port (621) and a second chip discharge port (622) are provided on the outside of the abutting support column (62). The first chip discharge port (621) is arranged in a circumferential array along the outside of the abutting support column (62) and there are multiple of them. The second chip discharge port (622) is opened on the outside of the abutting support column (62) and faces downward. The first chip discharge port (621) and the second chip discharge port (622) are both connected to the reserved space and are used to discharge chips when the processing head (2) extends into the inside of the abutting support column (62).

5. The mold flow channel processing equipment for a seven-layer composite heat shrinkable film according to claim 4, characterized in that: The post-drilling processing mechanism (7) includes a second linear drive unit (71), a connector (72), an abutment limiting guide sleeve (73), and a rotary cutting component (74); the second linear drive unit (71) is mounted on the rotary table (5) and close to the first linear drive unit (61); the connector (72) is fixedly connected to the second linear drive unit (71); the abutment limiting guide sleeve (73) is mounted on the connector (72); the rotary cutting component (74) is rotatably mounted on the connector (72) and is located inside the abutment limiting guide sleeve (73), and the outer side of the rotary cutting component (74) has two vertically arranged triangular cutting structures.

6. The mold flow channel processing equipment for a seven-layer composite heat shrinkable film according to claim 5, characterized in that: The abutting and limiting guide sleeve (73) has a contact surface that abuts against the inner wall of the mold. The contact surface is adapted to the inner wall of the mold. The contact surface has an opening slightly larger than the diameter of the starting end of the spiral. The abutting and limiting guide sleeve (73) has a first outlet (731) and a second outlet (732) on its outer side. The first outlet (731) is arranged in a circumferential array along the outer side of the abutting and limiting guide sleeve (73). The second outlet (732) is opened vertically on the outer side of the abutting and limiting guide sleeve (73).

7. The mold flow channel processing equipment for a seven-layer composite heat shrinkable film according to claim 6, characterized in that: The post-drilling processing mechanism (7) also includes a fixing ring (75), a limiting rod (76), and a second buffer (77); the fixing ring (75) is located on the outside of the abutting limiting guide sleeve (73), the limiting rod (76) is located on one side of the abutting limiting guide sleeve (73) and is in clearance fit with the fixing ring (75), the second buffer (77) is sleeved on the outside of the limiting rod (76), and the two ends of the second buffer (77) abut against the end faces of the abutting limiting guide sleeve (73) and the fixing ring (75), respectively.

8. The mold flow channel processing equipment for a seven-layer composite heat shrinkable film according to claim 7, characterized in that: When the abutting restricting guide sleeve (73) abuts against the inner wall of the mold, the abutting restricting guide sleeve (73) first contacts the inner wall of the mold and drives the second buffer part (77) to compress through the restricting rod (76); the outer diameter of the rotating cutter (74) is matched with the inner diameter of the opening of the abutting restricting guide sleeve (73), so that the rotating cutter (74) keeps in contact with the inner wall of the opening when it rotates.

9. The mold flow channel processing equipment for a seven-layer composite heat shrink film according to claim 6, characterized in that: The rotary cutting component (74) also includes a fine grinding column (78); the fine grinding column (78) is disposed on one side of the rotary cutting component (74); when the rotary cutting component (74) is driven by the second linear drive unit (71) to gradually cut off the inner flange of the opening, the fine grinding column (78) first extends into the inner wall of the spiral starting end and rotates, and there is a chip removal distance between the fine grinding column (78) and the rotary cutting component (74); when the rotary cutting component (74) completes the cutting and moves away from the mold under the drive of the second linear drive unit (71), the fine grinding column (78) carries out the residual waste chips in the spiral starting end.

10. A mold runner processing technology, using the mold runner processing equipment for seven-layer composite heat shrink film as described in any one of claims 1-9, characterized in that, Includes the following steps: S1. Place the mold on the support seat (3), and the rotary table (5) switches the drilling processing mechanism (6) to the working position. The first linear drive unit (61) drives the abutment support column (62) to move towards the inner wall of the mold, so that the abutment support column (62) abuts against the outside of the spiral starting end hole, and a flange reserved space is formed between the abutment support column (62) and the spiral starting end hole. The processing head (2) drills to form the spiral starting end on the outer wall of the mold. When it is close to penetrating the inner wall of the mold, the material forms a flange in the flange reserved space. The abutment support column (62) restricts the root of the flange, so that the flange shape is controllable. The processing head (2) only needs to reciprocate twice to complete the spiral starting end processing. S2, the rotary table (5) switches the drilling post-processing mechanism (7) to the working position, the second linear drive unit (71) drives the abutment limiting guide sleeve (73) to contact the inner wall of the mold, the abutment limiting guide sleeve (73) compresses the second buffer part (77) to form a flexible fit; the rotating cutting part (74) rotates inside the abutment limiting guide sleeve (73), the outer diameter of the rotating cutting part (74) is in contact with the inner wall of the opening of the abutment limiting guide sleeve (73); the rotating cutting part (74) gradually approaches the flange in the rotating state, the two triangular cutting structures on its outer side intermittently shear the flange, and at the same time the fine grinding column (78) extends into the inner wall of the spiral starting end and rotates before the rotating cutting part (74), and there is a chip removal distance between the fine grinding column (78) and the rotating cutting part (74); S3. After the rotary cutting part (74) completes the flanging cutting, the second linear drive unit (71) drives the rotary cutting part (74) and the fine grinding column (78) away from the mold. The fine grinding column (78) carries out the residual waste in the spiral starting end with the withdrawal action, completing the processing of the spiral starting end.

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