Composite mold for manufacturing double-layer bag cover

Abstract

The utility model relates to a composite die for manufacturing a double-layer bag cover. The composite die comprises a bottom plate, a cover plate, a bag cover inner pressing plate, a bag cover clamping and pressing plate, a bag cover surface pressing plate and a bag cover surface left side turnover plate which are flexibly connected, a lower suture line through groove and an upper suture line through groove are formed in the bottom plate and the cover plate; an inflection stretching assembly is arranged in the bag cover clamping plate; according to the utility model, the flexible connection facilitates opening and buckling; the bag cover surface pressing plate and the bag cover surface left side folding plate ensure that the bag cover surface folding size and the bag cover surface cutting piece size are matched with the bag cover lining; the left sliding plate and the right sliding plate of the bag cover clamping and pressing plate are directly pushed to evenly push folded 4 cm back to the two ends and stretch the folded 4 cm back to be flat, the two ends of the bag cover face are 1 cm longer than net printing of the two ends of the bag cover inner side, and therefore it is guaranteed that the sizes of the two ends of the bag cover are uniform, product quality is stabilized, time for drawing and printing of the bag cover face and the bag cover inner side is saved, and working efficiency is improved.

Description

Technical Field

[0001] This utility model relates to a composite mold for making double-layer bag flaps, belonging to the field of garment tooling technology. Background Technology

[0002] Double-layered flaps are a common design for training uniforms, professional attire, and outdoor workwear in foreign trade. Double-layered flaps enhance the garment's layering, detail, and decorative appeal, reinforcing the design style. However, due to the multiple layers (outer flap, inner flap, and interlayer), the structure is complex. The outer flap is 4cm longer than the inner flap. When sewing the sides of the flap, the outer flap must be folded back 4cm to match the inner flap's size. When sewing the outer opening, the folded 4cm must be evenly spread to both ends, ensuring the outer flap is 1cm longer than the inner flap after sewing. Hand-sewing this requires numerous manual markings for alignment, making the process tedious, difficult, time-consuming, and labor-intensive. Furthermore, due to variations in operator skill, hand-sewn flaps often have inconsistent angles and sizes, resulting in poor quality control, high rework rates, and significantly impacting garment quality and production efficiency. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a composite mold for making double-layer bag caps that is easy to place cut pieces, simple to operate, saves processes, ensures uniform size at both ends of the bag cap, has high work efficiency and stable product quality.

[0004] The present invention adopts the following technical solution:

[0005] This utility model relates to a composite mold for manufacturing double-layer bag flaps, comprising a base plate, a cover plate flexibly connected to the rear side of the base plate, an inner bag flap pressing plate flexibly connected to the front top surface of the base plate, a bag flap interlayer pressing plate flexibly connected to the front top surface of the inner bag flap pressing plate, a bag flap surface pressing plate flexibly connected to the front side of the inner bag flap pressing plate, and a left-side folding plate of the bag flap surface flexibly connected to the left front top surface of the bag flap surface pressing plate. A lower and upper seam through-slot are provided on the base plate and the cover plate, overlapping after fastening. A fold-back and stretching assembly is provided inside the interlayer bag flap pressing plate. An edge-guarding assembly is provided on the base plate, the inner bag flap pressing plate, and the interlayer bag flap pressing plate. The inner bag flap pressing plate, the interlayer bag flap pressing plate, the bag flap surface pressing plate, and the left-side folding plate of the bag flap surface are fastened together and positioned between the base plate and the cover plate.

[0006] The mold base plate and cover plate of this utility model are rectangular and equal in size after being fastened together. The lower seam groove includes a lower transverse groove on the rear side of the base plate, a lower left groove on the left side of the base plate, and a lower right groove on the right side of the base plate. The lower left and lower right grooves are parallel and slope to the right from back to front. The rear end of the lower left groove intersects with the left end of the lower transverse groove, and the rear end of the lower right groove intersects with the right end of the lower transverse groove. After the bag flap inner pressure plate, bag flap interlayer pressure plate, bag flap surface pressure plate, and bag flap surface left folding plate are fastened together: the bag flap inner pressure plate, bag flap interlayer pressure plate, bag flap surface pressure plate, and bag flap surface left folding plate are all located between the lower left and lower right grooves. The left and right sides of the bag flap inner pressure plate, bag flap interlayer pressure plate, bag flap surface pressure plate, and bag flap surface left folding plate are parallel to the lower left and lower right grooves, and the rear sides are parallel to the lower transverse groove. The left sides of the inner pressure plate and the interlayer pressure plate of the bag flap are flush with the right side of the lower left through groove, and the rear sides of the inner pressure plate and the interlayer pressure plate of the bag flap are flush with the lower transverse through groove. The right sides of the inner pressure plate, the interlayer pressure plate of the bag flap, and the left folding plate of the bag flap are flush with the left side of the lower right through groove. The left side of the pressure plate of the bag flap overlaps with the right side of the left folding plate of the bag flap. The upper seam through groove includes an upper transverse through groove set on the rear side of the cover plate, an upper left through groove set on the left side of the cover plate, and an upper right through groove set on the right side of the cover plate. The upper left through groove and the upper right through groove are parallel and inclined to the right from back to front. The rear end of the upper left through groove intersects with the left end of the upper transverse through groove, and the rear end of the upper right through groove intersects with the right end of the upper transverse through groove. After the bottom plate and the cover plate are fastened together: the lower transverse through groove coincides with the upper transverse through groove, the lower left through groove coincides with the upper left through groove, and the lower right through groove coincides with the upper right through groove.

[0007] This utility model mold edge-blocking assembly includes a bag cap inner edge-blocking assembly disposed on a base plate, a bag cap interlayer edge-blocking assembly disposed on a bag cap interlayer pressure plate, and a bag cap surface edge-blocking assembly disposed on a bag cap interlayer pressure plate. The bag cap inner edge-blocking assembly includes a rear bag cap inner edge-blocking strip disposed parallel to the rear side of the lower transverse channel, a right U-shaped bag cap inner edge-blocking strip and a right U-shaped bag cap inner edge-blocking strip disposed on the right side of the lower right channel, a left L-shaped bag cap inner edge-blocking strip disposed on the left side of the lower left channel, and a corner bag cap inner edge-blocking strip with a chamfered shape disposed at the intersection of the lower left channel and the lower transverse channel. The lower transverse channel is located between the right U-shaped bag flap inner side guard strip and the right U-shaped bag flap inner side guard strip. The side plates of the right U-shaped bag flap inner side guard strip and the right U-shaped bag flap inner side guard strip are collinear and parallel to the lower right channel. The side plate of the left L-shaped bag flap inner side guard strip is parallel to the lower transverse channel. The top corner of the right U-shaped bag flap inner side guard strip is inverted V-shaped, the bottom corner of the left L-shaped bag flap inner side guard strip is V-shaped, and the bottom edge of the right U-shaped bag flap inner side guard strip slopes downward from right to left. After the bag flap pressure plate and the left side folding plate of the bag flap are fastened to the bottom plate: the bag flap pressure plate and the left side folding plate of the bag flap The rear side of the folding plate is located behind the back edge panel of the back pocket flap; the area enclosed by the left L-shaped pocket flap edge panel, the corner pocket flap edge panel, the back pocket flap edge panel, the right U-shaped pocket flap edge panel, and the right U-shaped pocket flap edge panel matches the shape of the pocket flap lining piece; the pocket flap interlayer edge panel assembly includes the left L-shaped pocket flap edge panel, the pocket flap interlayer edge panel set at the top edge of the rear side of the pocket flap pressing plate, and the right U-shaped pocket flap edge panel; after the pocket flap pressing plate is fastened: the left L-shaped pocket flap edge panel, the pocket flap interlayer edge panel, and the right U-shaped pocket flap edge panel. The enclosed area matches the shape of the bag flap interlayer; the bag flap side guard assembly includes a left L-shaped bag flap inner side guard strip, a corner bag flap inner side guard strip, a rear bag flap inner side guard strip, a right ┛-shaped bag flap inner side guard strip, a right ┓-shaped bag flap inner side guard strip, a bag flap right front side side guard strip located on the right front side of the top surface of the bag flap interlayer pressing plate, and a bag flap left front side guard strip located on the left front side of the top surface of the bag flap interlayer pressing plate. The right end of the right front side guard strip corresponds to the end of the right ┛-shaped bag flap inner side guard strip, and the left end of the bag flap left front side guard strip corresponds to the right end of the left L-shaped bag flap inner side guard strip.

[0008] This utility model mold has a bag cap folding mark edge guard strip on the top surface of the bag cap pressing plate and 2cm away from the left side of the bag cap pressing plate. The bag cap folding mark edge guard strip is parallel to the left side of the bag cap pressing plate. The left side of the bag cap pressing plate is the edge guard for the bag cap to fold to the right. After the bag cap pressing plate and the left folding plate of the bag cap are fastened together: the right side of the left folding plate of the bag cap abuts against the left side of the bag cap folding mark edge guard strip. The right side of the left folding plate of the bag cap is the edge guard for the bag cap to fold back to the left.

[0009] The bag cap laminate of this utility model in the mold-locked state includes a pad plate and an upper plate. The folding and stretching assembly is disposed between the pad plate and the upper plate. The folding and stretching assembly includes a rear limiting plate and a front limiting plate fixedly disposed between the pad plate and the upper plate, and a left sliding plate and a right sliding plate slidably disposed on both sides of the rear limiting plate. The left sliding plate and the right sliding plate abut against both sides of the rear limiting plate. A U-shaped groove is provided on the rear side of the front limiting plate. The left side of the left sliding plate is parallel to the side plate of the L-shaped bag cap inner side guard strip and flush with the right side of the lower left through groove. The right side of the right sliding plate is parallel to the side plate of the right U-shaped bag cap inner side guard strip and flush with the left side of the lower right through groove. A rectangular left adjustment hole is provided on the left sliding plate, and a rectangular right adjustment hole is provided on the right sliding plate. A left square fixing plate and a right square fixing plate are fixedly disposed on the pad plate. The gap between the left square fixing plates is disposed within the left adjustment hole, and the gap between the right square fixing plates is disposed within the left adjustment hole. The gap is set inside the right adjustment hole. A rectangular window is set on the front side of the upper plate. A left push plate fixed to the left slide is set inside the left side of the window. The left end of the left push plate protrudes forward and corresponds to the left side of the U-shaped slot. A left operating hole is set on the right end of the left push plate. A right push plate fixed to the right slide is set inside the right side of the window. The right end of the right push plate protrudes forward and corresponds to the right side of the U-shaped slot. A right operating hole is set on the left end of the right push plate. Press the left operating hole and push the left push plate 1cm to the left so that the left side of the left slide plate abuts against the right side of the L-shaped bag cover inner side panel. At this time, the left square fixing plate abuts against the right side of the left adjustment hole. At the same time, the left end of the left push plate protrudes and abuts against the left side of the U-shaped slot. Press the right operating hole and push the right push plate 1cm to the right so that the right slide plate abuts against the left side of the right U-shaped bag cover inner side panel. The right square fixing plate abuts against the left side of the right adjustment hole. At the same time, the right end of the right push plate protrudes and abuts against the right side of the U-shaped slot.

[0010] This utility model provides a bag cover interlayer positioning line on the top surface of the inner pressure plate of the bag cover.

[0011] The cover plate of this utility model mold includes a left cover plate corresponding to the left folding plate after fastening and a right cover plate corresponding to the bag cover pressure plate; a left hollow is provided on the left cover plate and a right hollow is provided on the right cover plate; on the fastening surface of the cover plate: an upper shim strip is fixed to the rear edge of the upper transverse through groove, an upper left shim strip is fixed to the left edge of the upper left through groove, and an upper right shim strip is fixed to the right edge of the upper right through groove; anti-slip strips A are provided on the fastening surfaces of the upper shim strip, the upper left shim strip, and the upper right shim strip, and anti-slip strips B are provided on the outer side of the left hollow, the outer side of the right hollow, and the front side of the upper transverse through groove.

[0012] Anti-slip strips C are provided between the lower transverse through groove and the inner side panel of the rear bag cover, between the lower left through groove and the inner side panel of the left L-shaped bag cover, between the lower right through groove and the inner side panel of the right ┛-shaped bag cover, and between the lower right through groove and the inner side panel of the right ┓-shaped bag cover; anti-slip strips D are provided on the inner sides of the lower transverse through groove, the lower left through groove, and the lower right through groove; and anti-slip strips E are provided on both sides of the top surface of the inner pressure plate of the bag cover.

[0013] The positive effects of this utility model are as follows: The transparent base plate, cover plate, inner pressure plate of the bag cover, interlayer pressure plate of the bag cover, outer pressure plate of the bag cover, and left folding plate of the bag cover are all flexibly connected, which facilitates opening and closing; the outer cutting piece of the bag cover is 4cm longer than the inner cutting piece of the bag cover. When sewing the two sides of the bag cover, the outer cutting piece of the bag cover is folded back 4cm through the outer pressure plate of the bag cover and the left folding plate of the bag cover, ensuring the folded size and matching the size of the outer cutting piece of the bag cover with the inner bag cover; when stitching the outer opening of the bag cover, the folded 4cm is evenly pushed to both ends and stretched flat by directly pushing the left and right sliding plates of the interlayer pressure plate of the bag cover, so that the two ends of the outer bag cover are 1cm longer than the two ends of the inner bag cover. This not only ensures that the size of the two ends of the bag cover is uniform and stabilizes the product quality, but also saves a lot of time for printing on the outer and inner bags, improving work efficiency.

[0014] The area enclosed by the left L-shaped bag flap inner side panel, the corner bag flap inner side panel, the rear bag flap inner side panel, the right ┛-shaped bag flap inner side panel, and the right ┓-shaped bag flap inner side panel matches the shape of the bag flap inner panel, making it easy to determine the placement and positioning of the bag flap inner panel; the bag flap interlayer pressure plate is equipped with keyhole positioning holes and bag flap interlayer positioning lines are placed on the top surface of the bag flap pressure plate, making it easy to control the distance between the bag flap inner panel and the bag flap outer opening and the distance between the keyhole and the two ends of the bag flap when placing the bag flap interlayer.

[0015] The base plate and cover plate of this utility model are 1.5mm thick. The inner pressure plate of the bag cover, the outer pressure plate of the bag cover, and the left folding plate of the bag cover are all made of 0.5mm thick transparent PVC board. The interlayer pressure plate of the bag cover is made of 0.5mm thick transparent PVC board and fiberglass yellow board. The arrangement of the cut pieces can be clearly observed and adjusted. The mold of this utility model is easy to operate, reduces the number of processes, and saves time and effort. Attached Figure Description

[0016] Appendix Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Appendix Figure 2 This is a schematic diagram of the layered unfolded structure of this utility model;

[0018] Appendix Figure 3 This is a schematic diagram of the assembly structure of the parts of this utility model;

[0019] Appendix Figure 4 This is a schematic diagram of the base plate structure of this utility model;

[0020] Appendix Figure 5 This is a schematic diagram of the inner pressure plate structure of the bag lid of this utility model;

[0021] Appendix Figure 6 This is a schematic diagram of the sandwich panel for the bag cap of this utility model and its unfolded state.

[0022] Appendix Figure 7This is a schematic diagram of the assembly structure of the bag cap sandwich panel parts of this utility model;

[0023] Appendix Figure 8 This is a schematic diagram of the bag cap pressure plate structure of this utility model;

[0024] Appendix Figure 9 This is a schematic diagram of the left-side folding plate structure of this utility model.

[0025] In the attached diagram:

[0026] 1. Bottom plate; 11. Lower horizontal through groove; 12. Lower left through groove; 13. Lower right through groove; 101. Right ┛-shaped bag flap inner side guard strip; 102. Right ┓-shaped bag flap inner side guard strip; 103. Rear bag flap inner side guard strip; 104. Corner bag flap inner side guard strip; 105. Left L-shaped bag flap inner side guard strip; 106. Anti-slip strip C; 107. Anti-slip strip D.

[0027] 2. Cover plate; 21. Upper transverse through groove; 22. Upper left through groove; 23. Upper right through groove; 201. Left cover plate; 202. Right cover plate; 203. Left hollow; 204. Right hollow; 205. Upper shim strip; 206. Upper left shim strip; 207. Upper right shim strip; 208. Anti-slip strip A; 209. Anti-slip strip B.

[0028] 3. Bag lid inner pressure plate, 301. Bag lid interlayer edge guard strip, 302. Bag lid interlayer positioning line, 303. Anti-slip strip E;

[0029] 4. Bag lid interlayer pressure plate, 41. Pad plate, 401. Left square fixing plate, 402. Right square fixing plate, 42. Top plate, 43. Rear limit plate, 44. Left sliding plate, 440. Left adjustment hole, 441. Left push plate, 442. Left operating hole, 45. Right sliding plate, 450. Right adjustment hole, 451. Right push plate, 452. Right operating hole, 46. Window, 47. Keyhole positioning hole, 48. Front limit plate, 49. Anti-slip strip F, 481. U-shaped slot, 491. Right front side guard strip, 492. Left front side guard strip;

[0030] 5-bag cap pressure plate, 501-bag cap fold-back marking edge strip;

[0031] The left side of the 6-bag lid has a folding panel. Detailed Implementation

[0032] In the description of this utility model, the side of the base plate 1 corresponding to the operator is called the front, and the side away from the operator is called the rear.

[0033] As attached Figure 1-3As shown, the composite mold for manufacturing double-layer bag caps of this utility model includes a base plate 1, a cover plate 2 flexibly connected to the rear side of the base plate 1, a bag cap inner pressing plate 3 flexibly connected to the front top surface of the base plate 1, a bag cap interlayer pressing plate 4 flexibly connected to the front top surface of the bag cap inner pressing plate 3, a bag cap surface pressing plate 5 flexibly connected to the front side of the bag cap inner pressing plate 3, and a bag cap surface left folding plate 6 flexibly connected to the left front top surface of the bag cap surface pressing plate 5; on the base plate The bottom plate 1 and the cover plate 2 are provided with a lower seam through groove and an upper seam through groove that overlap after fastening; a fold-back stretching assembly is provided in the bag cover interlayer pressure plate 4; the flexible connection is made by adhesive tape or adhesive strip, which makes it easy to lift and fasten; a side guard assembly is provided on the bottom plate 1, the inner pressure plate 3 of the bag cover and the interlayer pressure plate 4 of the bag cover; the inner pressure plate 3 of the bag cover, the interlayer pressure plate 4 of the bag cover, the front pressure plate 5 of the bag cover and the left side folding plate 6 of the bag cover are fastened and set between the bottom plate 1 and the cover plate 2.

[0034] As attached Figure 1-4 As shown, the base plate 1 and cover plate 2 of this utility model are rectangular and equal in size after being fastened together; the lower seam through groove includes a lower transverse through groove 11 disposed on the rear side of the base plate 1, a lower left through groove 12 disposed on the left side of the base plate 1, and a lower right through groove 13 disposed on the right side of the base plate 1. The lower left through groove 12 and the lower right through groove 13 are parallel and inclined to the right from back to front; the rear end of the lower left through groove 12 intersects with the left end of the lower transverse through groove 11, and the rear end of the lower right through groove 13 intersects with the right end of the lower transverse through groove 11.

[0035] After the bag cap inner pressure plate 3, bag cap interlayer pressure plate 4, bag cap surface pressure plate 5, and bag cap left side folding plate 6 are fastened together: the bag cap inner pressure plate 3, bag cap interlayer pressure plate 4, bag cap surface pressure plate 5, and bag cap left side folding plate 6 are all located between the lower left through groove 12 and the lower right through groove 13; the left and right sides of the bag cap inner pressure plate 3, bag cap interlayer pressure plate 4, bag cap surface pressure plate 5, and bag cap left side folding plate 6 are parallel to the lower left through groove 12 and the lower right through groove 13, and the rear side is parallel to the lower transverse through groove 11. The left sides of the inner pressure plate 3 and the interlayer pressure plate 4 of the bag cover are flush with the right side of the lower left through groove 12. The rear sides of the inner pressure plate 3 and the interlayer pressure plate 4 of the bag cover are flush with the lower transverse through groove 11. The right sides of the inner pressure plate 3, the interlayer pressure plate 4 of the bag cover, and the left side folding plate 6 of the bag cover are flush with the left side of the lower right through groove 13. The left side of the pressure plate 5 of the bag cover overlaps with the right side of the left side folding plate 6 of the bag cover. The left side of the left side folding plate 6 of the bag cover is located on the right side of the lower left through groove 12.

[0036] The upper suture groove includes an upper transverse groove 21 located on the rear side of the cover plate 2, an upper left groove 22 located on the left side of the cover plate 2, and an upper right groove 23 located on the right side of the cover plate 2. The upper left groove 22 and the upper right groove 23 are parallel and inclined to the right from back to front. The rear end of the upper left groove 22 intersects with the left end of the upper transverse groove 21, and the rear end of the upper right groove 22 intersects with the right end of the upper transverse groove 21. After the bottom plate 1 and the cover plate 2 are fastened together: the lower transverse groove 11 coincides with the upper transverse groove 21, the lower left groove 12 coincides with the upper left groove 22, and the lower right groove 13 coincides with the upper right groove 23.

[0037] As attached Figure 4 , 5 As shown in Figures 8 and 9, the edge-guarding assembly of this utility model includes an inner edge-guarding assembly for the bag cover on the base plate 1, an inner edge-guarding assembly for the bag cover on the inner pressure plate 3, and an outer edge-guarding assembly for the bag cover on the inner pressure plate 4.

[0038] The bag flap inner edge guard assembly includes a rear bag flap inner edge guard strip 103 parallel to the rear side of the lower transverse channel 11, a right U-shaped bag flap inner edge guard strip 101 and a right U-shaped bag flap inner edge guard strip 102 on the right side of the lower right channel 13, a left L-shaped bag flap inner edge guard strip 105 on the left side of the lower left channel 12, and a corner bag flap inner edge guard strip 104 chamfered at the intersection of the lower left channel 12 and the lower transverse channel 11; the right end of the lower transverse channel 11 is located between the right U-shaped bag flap inner edge guard strip 101 and the right U-shaped bag flap inner edge guard strip 102, and the right U-shaped bag flap inner edge guard strip 101 and the right U-shaped bag flap inner edge guard strip 102 are located between the right U-shaped bag flap inner edge guard strip 101 and the right U-shaped bag flap inner edge guard strip 102. The side panels of the inner side panel 102 are collinear and parallel to the lower right through groove 13. The side panel of the inner side panel 105 of the left L-shaped bag flap is parallel to the lower transverse through groove 11. The top corner of the inner side panel 102 of the right ┓-shaped bag flap is an inverted V-shape that matches the upper right corner of the bag flap lining and the bag flap surface. The bottom corner of the inner side panel 105 of the left L-shaped bag flap is a V-shape that matches the lower left corner of the bag flap lining and the bag flap surface. The bottom edge of the inner side panel 101 of the right ┛-shaped bag flap slopes downward from right to left. After the bag flap pressing plate 5 and the left side folding plate 6 of the bag flap are fastened to the bottom plate 1, the rear side of the bag flap pressing plate 5 and the left side folding plate 6 of the bag flap are located behind the inner side panel 103 of the rear bag flap.

[0039] The area enclosed by the left L-shaped bag flap lining strip 105, the corner bag flap lining strip 104, the back bag flap lining strip 103, the right ┓-shaped bag flap lining strip 102, and the right ┛-shaped bag flap lining strip 101 matches the shape of the bag flap lining piece.

[0040] The bag flap interlayer edge guard assembly includes a left L-shaped bag flap inner edge guard strip 105, a bag flap interlayer edge guard strip 301 set on the rear side top edge of the bag flap inner pressure plate 3, and a right ┛-shaped bag flap inner edge guard strip 101; after the bag flap inner pressure plate 3 is fastened, the area enclosed by the left L-shaped bag flap inner edge guard strip 105, the bag flap interlayer edge guard strip 301, and the right ┛-shaped bag flap inner edge guard strip 101 matches the shape of the bag flap interlayer.

[0041] The bag flap edge guard assembly includes a left L-shaped bag flap inner edge guard strip 105, a corner bag flap inner edge guard strip 104, a rear bag flap inner edge guard strip 103, a right ┛-shaped bag flap inner edge guard strip 101 and a right ┓-shaped bag flap inner edge guard strip 102, a right front side edge guard strip 491 disposed on the right front side of the top surface of the bag flap interlayer plate 4, and a left front side edge guard strip 492 disposed on the left front side of the top surface of the bag flap interlayer plate 4. The right end of the right front side edge guard strip 491 corresponds to the end of the right ┛-shaped bag flap inner edge guard strip 101, and the left end of the left front side edge guard strip 492 corresponds to the right end of the left L-shaped bag flap inner edge guard strip 105.

[0042] As attached Figure 8 , 9 As shown, a bag cover folding mark edge guard strip 501 is set on the top surface of the bag cover pressure plate 5 and 2cm away from the left side of the bag cover pressure plate 5. The bag cover folding mark edge guard strip 501 is parallel to the left side of the bag cover pressure plate 5. The left side of the bag cover pressure plate 5 is the edge guard for the bag cover to fold to the right. After the bag cover pressure plate 5 and the left folding plate 6 of the bag cover are fastened together: the right side of the left folding plate 6 of the bag cover abuts against the left side of the bag cover folding mark edge guard strip 501. The right side of the left folding plate 6 of the bag cover is the edge guard for the bag cover to fold to the left.

[0043] As attached Figure 2 , 3 As shown in Figures 5, 6, and 7, a keyhole positioning hole 47 is vertically set on the bag cap interlayer pressure plate 4, and a bag cap interlayer positioning line 302 is set on the top surface of the bag cap inner pressure plate 3, which coincides with the center line of the keyhole positioning hole 47.

[0044] The bag cap laminate 4 in the snap-fit ​​state includes a pad 41 and an upper plate 42. The fold-back and stretch-out assembly is disposed between the pad 41 and the upper plate 42. The fold-back and stretch-out assembly includes a rear 43 and a front limiting plate 48 fixedly disposed between the pad 41 and the upper plate 42, and a left sliding plate 44 and a right sliding plate 45 slidably disposed on both sides of the limiting plate 43. The keyhole positioning hole in the middle is disposed on the pad 41. The keyhole positioning holes on the pad 41 and the upper plate 42 coincide with the keyhole positioning hole on the pad 41 to form a keyhole positioning hole 47. In the initial position, the left sliding plate 44 and the right sliding plate 45 abut against the sides of the limiting plate 43, and the left side of the left sliding plate 44 is in contact with the pad 41. The left side of the upper plate 42 is flush with the left side of the upper plate 42, and the right side of the right slide plate 45 is flush with the right side of the pad plate 41 and the upper plate 42. A U-shaped slot 481 is provided on the rear side of the front limiting plate 48. The left side of the left slide plate 44 is parallel to the side plate of the L-shaped bag cover inner side guard strip 105 and is flush with the right side of the lower left through groove 12. The right side of the right slide plate 45 is parallel to the side plate of the right U-shaped bag cover inner side guard strip 101 and is flush with the left side of the lower right through groove 13. A rectangular left adjustment hole 440 is provided on the left slide plate 44, and a rectangular right adjustment hole 450 is provided on the right slide plate 45. A left square fixing plate 401 and a right square fixing plate 45 are fixed on the pad plate 41. Plate 402, the left square fixing plate 401 is spaced within the left adjustment hole 440, the right square fixing plate 402 is spaced within the right adjustment hole 450, a rectangular opening 46 is provided on the front side of the upper plate 42, a left push plate 441 fixed to the left slide plate 44 is provided on the left side of the opening 46, the left end of the left push plate 441 protrudes forward and corresponds to the left side of the U-shaped slot 481, a left operating hole 442 is provided on the right end of the left push plate 441, a right push plate 451 fixed to the right slide plate 45 is provided on the right side of the opening 46, the right end of the right push plate 451 protrudes forward and corresponds to the right side of the U-shaped slot 481, a left operating hole 442 is provided on the left end of the right push plate 451. Place the right operating hole 452; press the left operating hole 442 and push the left push plate 441 1cm to the left so that the left side of the left sliding plate 44 abuts against the right side of the L-shaped bag flap inner side guard strip 105. At this time, the left square fixing plate 401 abuts against the right side of the left adjusting hole 440, and at the same time, the left end of the left push plate 441 protrudes and abuts against the left side of the U-shaped slot 481. Press the right operating hole 452 and push the right push plate 451 1cm to the right so that the right sliding plate 45 abuts against the left side of the right U-shaped bag flap inner side guard strip 101, and the right square fixing plate 402 abuts against the left side of the right adjusting hole 450. At the same time, the right end of the right push plate 451 protrudes and abuts against the right side of the U-shaped slot 481. That is, the left sliding plate 44 and the right sliding plate 45 evenly stretch the 4cm of the folded bag flap to the left and right respectively, matching the inner cut piece of the bag flap.

[0045] As attached Figure 2 , 3As shown, the cover plate 2 includes a left cover plate 201 that corresponds to the left folding plate 6 after being fastened, and a right cover plate 202 that corresponds to the bag cover pressure plate 5. A left cutout 203 is provided on the left cover plate 201, and a right cutout 204 is provided on the right cover plate 202. The left cutout 203 and the right cutout 204 are irregular quadrilateral holes. When fastening the left cover plate 201 and the right cover plate 202, the cut piece is pressed down by hand to prevent it from shifting. Located on the fastening surface of cover plate 2: upper shim strip 205 is fixed to the rear edge of upper transverse channel 21, upper left shim strip 206 is fixed to the left edge of upper left channel 22, and upper right shim strip 207 is fixed to the right edge of upper right channel 23; due to the presence of cover lining pressure plate 3, bag cover interlayer pressure plate 4, bag cover face pressure plate 5 and bag cover face left folding plate 6 between base plate 1 and cover plate 2, there are many core boards between base plate 1 and cover plate 2, which are uneven when fastening cover plate 2, affecting the passage of roller presser foot. The shim strips play the role of making the groove level and facilitating sewing. Anti-slip strips A208 are set on the fastening surfaces of upper shim strip 205, upper left shim strip 206 and upper right shim strip 207, and anti-slip strips B209 are set on the outer side of left hollow 203, the outer side of right hollow 204 and the front side of upper transverse channel 21.

[0046] As attached Figure 2 , 4 As shown in Figures 5 and 6, anti-slip strips C106 are provided between the lower transverse channel 11 and the inner edge strip 103 of the rear bag cover, between the lower left channel 12 and the inner edge strip 105 of the left L-shaped bag cover, between the lower right channel 13 and the inner edge strip 101 of the right ┛-shaped bag cover, and between the lower right channel 13 and the inner edge strip 102 of the right ┓-shaped bag cover. Anti-slip strips D107 are provided inside the lower transverse channel 11, the lower left channel 12, and the lower right channel 13. Anti-slip strips E303 are provided on the top side of the inner pressure plate 3 of the bag cover, and anti-slip strips F49 are provided on the top side of the inner pressure plate 4 of the bag cover. The anti-slip strips A208, B209, C106, D107, E303, and F49 are all sandpaper or abrasive cloth to prevent the cut pieces from shifting.

[0047] The working process of this utility model is as follows: The bag cover interlayer is a semi-finished product, with buttonholes already sewn on it, and its lower end is folded and ironed; place the snap-fit ​​composite mold on the workbench, lift the cover plate 2 backward, and lift the left folding plate 6, bag cover pressure plate 5, bag cover interlayer pressure plate 4, and bag cover inner pressure plate 3 in sequence forward; lay the bag cover inner piece in the area enclosed by the left L-shaped bag cover inner edge strip 105, the corner bag cover inner edge strip 104, the rear bag cover inner edge strip 103, the right ┓-shaped bag cover inner edge strip 102, and the right ┛-shaped bag cover inner edge strip 101; the upper right corner of the bag cover inner piece is embedded in the inverted V-shaped corner of the right ┓-shaped bag cover inner edge strip 102, and the lower left corner of the bag cover inner piece is embedded in the V-shaped corner of the left L-shaped bag cover inner edge strip 105; and then place the bag cover inner piece in the workbench. The lining plate 3 is fastened and pressed onto the upper surface of the bag flap. The bag flap interlayer is laid within the area enclosed by the left L-shaped bag flap inner side guard strip 105, the bag flap interlayer side guard strip 301, and the right ┛-shaped bag flap inner side guard strip 101. Adjustment is made so that the center line of the keyhole in the bag flap interlayer coincides with the positioning line 302 of the bag flap interlayer. The bag flap interlayer pressing plate 4 is fastened and pressed onto the upper surface of the bag flap interlayer. Adjustment is made so that the keyhole in the bag flap interlayer coincides with the keyhole positioning hole 47. Next, the bag flap is laid on the bag flap interlayer pressing plate 4, with the right side of the bag flap laid within the area enclosed by the rear bag flap inner side guard strip 103, the right ┓-shaped bag flap inner side guard strip 102, the right ┛-shaped bag flap inner side guard strip 101, and the right front side side guard strip 491 of the bag flap. The right top corner of the bag flap is embedded within the inverted V-shaped corner of the right ┓-shaped bag flap inner side guard strip 102. Fasten and press the bag flap pressing plate 5 onto the right side of the bag flap. Fold the left side of the bag flap diagonally to the right along the left edge of the pressing plate 5 and press it onto the surface of the pressing plate 5. Fasten and press the left folding plate 6 onto the bag flap surface of the left bag flap pressing plate 5, so that the right edge of the left folding plate 6 abuts against the left edge of the folded edge guard strip 501. The width of the bag flap pressed by the left folding plate 6 is 2cm. Then fold the bag flap diagonally to the left 2cm along the right edge of the left folding plate 6. The folded bag flap lies within the area enclosed by the left L-shaped bag flap inner edge guard strip 105, the corner bag flap inner edge guard strip 104, and the left front edge guard strip 492 of the bag flap. The lower left corner of the bag flap is embedded in the V-shaped corner of the left L-shaped bag flap inner edge guard strip 105. Press down with your hand. The folded bag flap is fastened to the left cover plate 201, allowing the left cutout 203 to pass through and press against the left side of the bag flap. Then, the right cover plate 202 is fastened downwards and pressed against the right side of the bag flap. After the composite mold is fully fastened, the present invention is placed under the presser feet. The two sides of the bag flap are sewn along the overlapping left and right through grooves. After sewing, the mold is removed and placed on the workbench. The left cover plate 201 and the right cover plate 202 are lifted backwards. The left folding plate 6 of the bag flap is pulled forward from between the bag flap and the bag flap interlayer. The bag flap pressing plate 5 is then lifted forward. The bag flap is slightly lifted, and the left operating hole 442 is pressed to push the left push plate 4411cm to the left so that the left side of the left sliding plate 44 abuts against the right side of the L-shaped bag flap inner side guard strip 105. The 4cm folded back of the bag flap piece is stretched to the left and straightened by 2cm.At this point, the left square fixing plate 401 abuts against the right side of the left adjusting hole 440, while the left end of the left push plate 441 protrudes and abuts against the left side of the U-shaped slot 481. Press the right operating hole 452 and push the right push plate 451 1cm to the right so that the right sliding plate 45 abuts against the left side of the right U-shaped bag flap inner side guard strip 101. Fold the bag flap fabric back 4cm and stretch it to the right 2cm. The right square fixing plate 402 abuts against the left side of the right adjusting hole 450, while the right end of the right push plate 451 protrudes and abuts against the right side of the U-shaped slot 481. Fasten the cover plate 2, place the mold under the presser foot of the flat sewing machine, and sew the outer opening of the bag flap along the overlapping transverse through groove. After sewing, remove the mold, lift the cover plate 2, and take out the sewn bag flap.

[0048] The transparent base plate 1, cover plate 2, inner pressure plate 3, interlayer pressure plate 4, outer pressure plate 5, and left folding plate 6 of the outer pressure plate are all flexibly connected, facilitating opening and closing. The outer pressure plate is 4cm longer than the inner pressure plate. When sewing the two sides of the outer pressure plate, the outer pressure plate is folded back 4cm through the outer pressure plate 5 and the left folding plate 6 to ensure the folded size matches the inner pressure plate. When sewing the outer opening of the outer pressure plate, the folded 4cm is evenly pushed to both ends and stretched flat by directly pushing the left slide plate 44 and right slide plate 45 of the interlayer pressure plate 4, so that the two ends of the outer pressure plate are 1cm longer than the two ends of the inner pressure plate. This ensures that the two ends of the outer pressure plate are uniform in size, stabilizes product quality, saves a lot of time on the outer and inner pressure plates, and improves work efficiency.

[0049] The area enclosed by the left L-shaped bag flap inner edge strip 105, the corner bag flap inner edge strip 104, the rear bag flap inner edge strip 103, the right ┛-shaped bag flap inner edge strip 101, and the right ┓-shaped bag flap inner edge strip 102 matches the shape of the bag flap inner piece, making it easy to determine the placement and positioning of the bag flap inner piece; the bag flap interlayer pressure plate 4 is provided with a keyhole positioning hole 52 and the bag flap interlayer positioning line 302 is placed on the top surface of the bag flap pressure plate 3, which makes it easy to control the distance between the bag flap inner piece and the bag flap outer opening and the distance between the keyhole and the two ends of the bag flap when placing the bag flap interlayer.

[0050] The base plate and cover plate of this utility model are 1.5mm thick. The inner pressure plate 3 of the bag cover, the outer pressure plate 5 of the bag cover, and the left folding plate 6 of the bag cover are all made of 0.5mm thick transparent PVC board. The interlayer pressure plate 4 of the bag cover is made of 0.5mm thick transparent PVC board and fiberglass yellow board. The arrangement of the cut pieces can be clearly observed and adjusted. The mold of this utility model is easy to operate, reduces the number of processes, and saves time and effort.

Claims

1. A composite mold for manufacturing double-layer bag caps, characterized in that, It includes a base plate (1), a cover plate (2) flexibly connected to the rear side of the base plate (1), a bag flap inner pressure plate (3) flexibly connected to the front top surface of the base plate (1), a bag flap interlayer pressure plate (4) flexibly connected to the front top surface of the bag flap inner pressure plate (3), a bag flap surface pressure plate (5) flexibly connected to the front side of the bag flap inner pressure plate (3), and a bag flap surface left folding plate (6) flexibly connected to the left front top surface of the bag flap surface pressure plate (5); a lower seam through groove and an upper seam through groove that overlap after fastening are provided on the base plate (1) and the cover plate (2); a back folding and stretching assembly is provided inside the bag flap interlayer pressure plate (4); Side guard components are provided on the bottom plate (1), the inner pressure plate (3) of the bag cover, and the interlayer pressure plate (4) of the bag cover; The bag cover inner pressure plate (3), bag cover interlayer pressure plate (4), bag cover surface pressure plate (5) and bag cover left side folding plate (6) are fastened together and set between the bottom plate (1) and the cover plate (2).

2. The composite mold for manufacturing double-layer bag caps according to claim 1, characterized in that, The base plate (1) and the cover plate (2) are rectangular and equal in size when fastened together; The lower suture groove includes a lower transverse groove (11) located on the rear side of the base plate (1), a lower left groove (12) located on the left side of the base plate (1), and a lower right groove (13) located on the right side of the base plate (1). The lower left groove (12) and the lower right groove (13) are parallel and inclined to the right from back to front. The rear end of the lower left groove (12) intersects with the left end of the lower transverse groove (11), and the rear end of the lower right groove (13) intersects with the right end of the lower transverse groove (11). After the bag cap inner pressure plate (3), bag cap interlayer pressure plate (4), bag cap surface pressure plate (5), and bag cap left side folding plate (6) are fastened together: the bag cap inner pressure plate (3), bag cap interlayer pressure plate (4), bag cap surface pressure plate (5), and bag cap left side folding plate (6) are all located between the lower left through groove (12) and the lower right through groove (13); the bag cap inner pressure plate (3), bag cap interlayer pressure plate (4), bag cap surface pressure plate (5), and bag cap left side folding plate (6) are connected to the lower left through groove (12) and the lower right through groove (13) on both the left and right sides. Parallel, the rear sides are all parallel to the lower transverse through groove (11); the left sides of the bag cover inner pressure plate (3) and the bag cover interlayer pressure plate (4) are all flush with the right side of the lower left through groove (12), the rear sides of the bag cover inner pressure plate (3) and the bag cover interlayer pressure plate (4) are flush with the lower transverse through groove (11), the right sides of the bag cover inner pressure plate (3), the bag cover interlayer pressure plate (4) and the left side folding plate (6) of the bag cover surface are flush with the left side of the lower right through groove (13); the left side of the bag cover surface pressure plate (5) overlaps with the right side of the left side folding plate (6) of the bag cover surface. The upper suture groove includes an upper transverse groove (21) located on the rear side of the cover plate (2), an upper left groove (22) located on the left side of the cover plate (2), and an upper right groove (23) located on the right side of the cover plate (2). The upper left groove (22) and the upper right groove (23) are parallel and inclined to the right from back to front. The rear end of the upper left groove (22) intersects with the left end of the upper transverse groove (21), and the rear end of the upper right groove (23) intersects with the right end of the upper transverse groove (21). After the base plate (1) and cover plate (2) are fastened together: the lower transverse through groove (11) coincides with the upper transverse through groove (21), the lower left through groove (12) coincides with the upper left through groove (22), and the lower right through groove (13) coincides with the upper right through groove (23).

3. The composite mold for manufacturing a double-layer bag cap according to claim 2, characterized in that, The edge-blocking assembly includes a bag cover inner edge-blocking assembly disposed on the base plate (1), a bag cover interlayer edge-blocking assembly disposed on the bag cover inner pressure plate (3), and a bag cover surface edge-blocking assembly disposed on the bag cover interlayer pressure plate (4). The bag flap lining edge assembly includes a rear bag flap lining edge strip (103) parallel to the rear side of the lower transverse channel (11), a right U-shaped bag flap lining edge strip (101) and a right U-shaped bag flap lining edge strip (102) on the right side of the lower right channel (13), a left L-shaped bag flap lining edge strip (105) on the left side of the lower left channel (12), and a corner bag flap lining edge strip (104) beveled at the intersection of the lower left channel (12) and the lower transverse channel (11); the right end of the lower transverse channel (11) is located between the right U-shaped bag flap lining edge strip (101) and the right U-shaped bag flap lining edge strip (102), and the right U-shaped bag flap lining edge assembly includes a rear bag flap lining edge strip (103) parallel to the rear side of the lower transverse channel (11), a right U-shaped bag flap lining edge strip (101) and a right U-shaped bag flap lining edge strip (102), and a right U-shaped bag flap lining edge strip (104) beveled at the intersection of the lower left channel (12) and the lower transverse channel (11). The side panels of the side guard strip (101) and the right ┓-shaped bag flap side guard strip (102) are collinear and parallel to the lower right through groove (13). The side panel of the left L-shaped bag flap side guard strip (105) is parallel to the lower transverse through groove (11). The top corner of the right ┓-shaped bag flap side guard strip (102) is inverted V-shaped, the bottom corner of the left L-shaped bag flap side guard strip (105) is V-shaped, and the bottom edge of the right ┛-shaped bag flap side guard strip (101) slopes downward from right to left. After the bag flap pressure plate (5) and the left side folding plate (6) of the bag flap are fastened to the bottom plate (1): the rear side of the bag flap pressure plate (5) and the left side folding plate (6) of the bag flap are located behind the rear bag flap side guard strip (103). The area enclosed by the left L-shaped bag flap lining strip (105), the corner bag flap lining strip (104), the back bag flap lining strip (103), the right ┓-shaped bag flap lining strip (102), and the right ┛-shaped bag flap lining strip (101) matches the shape of the bag flap lining piece; The bag flap interlayer edge guard assembly includes a left L-shaped bag flap inner edge guard strip (105), a bag flap interlayer edge guard strip (301) set on the rear side top edge of the bag flap inner pressure plate (3), and a right ┛-shaped bag flap inner edge guard strip (101); after the bag flap inner pressure plate (3) is fastened: the area enclosed by the left L-shaped bag flap inner edge guard strip (105), the bag flap interlayer edge guard strip (301), and the right ┛-shaped bag flap inner edge guard strip (101) matches the shape of the bag flap interlayer; The bag cover edge guard assembly includes a left L-shaped bag cover inner edge guard strip (105), a corner bag cover inner edge guard strip (104), a rear bag cover inner edge guard strip (103), a right ┛-shaped bag cover inner edge guard strip (101) and a right ┓-shaped bag cover inner edge guard strip (102), a bag cover right front edge guard strip (491) set on the right front side of the top surface of the bag cover interlayer press plate (4), and a bag cover left front edge guard strip (492) set on the left front side of the top surface of the bag cover interlayer press plate (4). The right end of the right front edge guard strip (491) corresponds to the end of the right ┛-shaped bag cover inner edge guard strip (101), and the left end of the bag cover left front edge guard strip (492) corresponds to the right end of the left L-shaped bag cover inner edge guard strip (105).

4. The composite mold for manufacturing a double-layer bag cap according to claim 3, characterized in that, A bag cover folding mark edge guard strip (501) is set on the top surface of the bag cover pressure plate (5) and 2cm away from the left side of the bag cover pressure plate (5). The bag cover folding mark edge guard strip (501) is parallel to the left side of the bag cover pressure plate (5). The left side of the bag cover pressure plate (5) is the edge guard for the bag cover to fold to the right. After the bag cover pressure plate (5) and the left folding plate (6) of the bag cover are fastened together: the right side of the left folding plate (6) of the bag cover abuts against the left side of the bag cover folding mark edge guard strip (501). The right side of the left folding plate (6) of the bag cover is the edge guard for the bag cover to fold to the left.

5. The composite mold for manufacturing a double-layer bag cap according to claim 3, characterized in that, The snap-fit ​​bag cap laminate (4) includes a pad (41) and an upper plate (42), and the fold-back extension assembly is disposed between the pad (41) and the upper plate (42). The folding and stretching assembly includes a rear limiting plate (43) and a front limiting plate (48) fixedly disposed between the pad plate (41) and the upper plate (42), and a left sliding plate (44) and a right sliding plate (45) slidably disposed on both sides of the rear limiting plate (43); the left sliding plate (44) and the right sliding plate (45) abut against both sides of the rear limiting plate (43), and a U-shaped slot (481) is provided on the rear side of the front limiting plate (48). The left side of the left slide plate (44) is parallel to the side plate of the L-shaped bag cover inner side panel (105) and flush with the right side of the lower left through groove (12). The right side of the right slide plate (45) is parallel to the side plate of the right ┛-shaped bag cover inner side panel (101) and flush with the left side of the lower right through groove (13). A rectangular left adjustment hole (440) is provided on the left slide plate (44), and a rectangular right adjustment hole (450) is provided on the right slide plate (45). A left square fixing plate (401) and a right square fixing plate (402) are fixedly provided on the pad plate (41). The gap of the left square fixing plate (401) is set in the left adjustment hole (440), and the gap of the right square fixing plate (402) is set in the right adjustment hole (450). A rectangular opening (46) is provided on the front side of the upper plate (42). A left push plate (441) fixed to the left slide plate (44) is provided on the left side of the opening (46). The left end of the left push plate (441) protrudes forward and corresponds to the left side of the U-shaped slot (481). A left operating hole (442) is provided on the right end of the left push plate (441). A right push plate (451) fixed to the right slide plate (45) is provided on the right side of the opening (46). The right end of the push plate (451) protrudes forward to correspond to the right side of the U-shaped slot (481). A right operating hole (452) is provided on the left end of the right push plate (451). Pressing the left operating hole (442) pushes the left push plate (441) 1cm to the left so that the left side of the left slide plate (44) abuts against the right side of the L-shaped bag cover inner side guard strip (105). At this time, the left square fixing plate (401) abuts against the right side of the left adjusting hole (440), and at the same time, the left... The left end of the push plate (441) protrudes and abuts against the left side of the U-shaped slot (481). Press the right operating hole (452) and push the right push plate (451) 1cm to the right so that the right slide plate (45) abuts against the left side of the right U-shaped bag cover inner side panel (101). The right square fixing plate (402) abuts against the left side of the right adjustment hole (450). At the same time, the right end of the right push plate (451) protrudes and abuts against the right side of the U-shaped slot (481).

6. The composite mold for manufacturing a double-layer bag cap according to claim 3, characterized in that, A bag cover interlayer positioning line (302) is set on the top surface of the pressure plate (3) inside the bag cover.

7. The composite mold for manufacturing a double-layer bag cap according to claim 4, characterized in that, The cover plate (2) includes a left cover plate (201) that corresponds to the left folding plate (6) after being fastened and a right cover plate (202) that corresponds to the bag cover pressure plate (5); a left cutout (203) is provided on the left cover plate (201) and a right cutout (204) is provided on the right cover plate (202); Located on the fastening surface of the cover plate (2): fix the upper shim strip (205) on the rear edge of the upper transverse through groove (21), fix the upper left shim strip (206) on the left edge of the upper left through groove (22), and fix the upper right shim strip (207) on the right edge of the upper right through groove (23). Anti-slip strip A (208) is provided on the mating surfaces of the upper shim strip (205), the upper left shim strip (206), and the upper right shim strip (207). Anti-slip strip B (209) is provided on the outer side of the left hollow (203), the outer side of the right hollow (204), and the front side of the upper transverse through groove (21).

8. The composite mold for manufacturing a double-layer bag cap according to claim 4, characterized in that, Anti-slip strips C (106) are provided between the lower transverse channel (11) and the inner side panel (103) of the rear bag cover, between the lower left channel (12) and the inner side panel (105) of the left L-shaped bag cover, between the lower right channel (13) and the inner side panel (101) of the right ┛-shaped bag cover, and between the lower right channel (13) and the inner side panel (102) of the right ┓-shaped bag cover; anti-slip strips D (107) are provided inside the lower transverse channel (11), the lower left channel (12), and the lower right channel (13). Anti-slip strips E (303) are installed on both sides of the top surface of the pressure plate (3) inside the bag cover.

Images