Rotary cutting die with double-guide structure

Abstract

The utility model discloses a rotary cutting die with a double guide structure, which comprises an upper die holder, an upper backing plate, an upper fixing plate, a cover plate, a lower die plate, a lower backing plate and a lower die holder which are sequentially arranged from top to bottom, four rotary cutting guide rails are arranged in the upper fixing plate, a guide block is arranged among the four rotary cutting guide rails, a first spring is arranged above the guide block, and a second spring is arranged above the guide block. A rotary cutting punch is connected to the lower portion of the guide block, a rotary cutting knife edge is arranged in the lower die plate, the upper end and the lower end of each side face of the guide block are each provided with two guide protruding parts, each rotary cutting guide rail is provided with two contact protruding parts, a rotary cutting profiling positioning head is arranged below the rotary cutting punch, and an equal-height screw is connected between the rotary cutting punch and the rotary cutting profiling positioning head. The rotary-cutting punch has the advantages that the two guide protruding parts on the guide block are matched with the two contact protruding parts on the rotary-cutting guide rail to form a double-guide structure, it is guaranteed that the rotary-cutting process of the rotary-cutting punch is more stable and smoother, the rotary-cutting punch is small in deviation quantity and high in stability, and the planeness of a product port is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to mould technical field, concretely is a kind of rotary cutting mould with double guide structure. BACKGROUND

[0002] With the progress and development of science and technology, the competition of mould industry is more and more intense, and the fittest survive, force many mould enterprises to seek change.Currently, the shielding cover product on the market, port flatness 0.03-0.05mm, port has no special obvious defect, and customer can accept.But for some high-end products, customer's requirement to port is particularly high, port flatness is within 0.02mm, burr, appearance requirement is particularly high, and price cannot be too expensive, and existing rotary cutting structure is difficult to meet this requirement.New structure of research and development mould improves the yield and efficiency of product, and becomes the top priority of enterprise sustainable development.

[0003] The common structure of rotary cutting structure in current rotary cutting type forming mould is as shown in Figure 1 There is only one guide point A on guide block, and rotary cutting guide rail has contact point B matched with guide point A, in movement, slight inclination occurs in guide block, thus causing slight inclination of punch connected with guide block when rotary cutting, so that the flatness of product cut out is not good, burr is large, and punch and cutting edge are easily damaged.Moreover, the stability of this structure is not high when SPM (strokes per minute) is more than 60, and size occasionally varies.Therefore, the conventional rotary cutting structure not only affects the flatness of rotary cutting port of product, affects the quality of rotary cutting of product, but also increases the number of part maintenance, and reduces production efficiency. CONTENT OF UTILITY MODEL

[0004] The utility model aims at providing a kind of rotary cutting mould with double guide structure to solve the problems in the above background.

[0005] To achieve the above object, the utility model provides the following technical scheme: A kind of rotary cutting mould with double guiding structure, including upper die holder, upper backing plate, upper fixed plate, cover plate, lower die plate, lower backing plate and lower die holder which are sequentially arranged from top to bottom, four rotary cutting guide rails are equipped in the upper fixed plate, four rotary cutting guide rails are enclosed into rectangle, the middle of four rotary cutting guide rails is equipped with guiding block matched therewith, the top of guiding block is equipped with first spring, the lower of guiding block is connected with rotary cutting punch, rotary cutting cutting edge matched with rotary cutting punch is equipped in lower die plate, the upper and lower ends of each side of guiding block are equipped with two guiding protrusions, the side of each rotary cutting guide rail opposite guiding block is equipped with two contact protrusions matched with guiding protrusion, the lower of rotary cutting punch is equipped with rotary cutting profiling positioning head, equal height screw is connected between rotary cutting punch and rotary cutting profiling positioning head, rotary cutting punch and equal height screw are movably connected, rotary cutting profiling positioning head and equal height screw are fixedly connected, the upper end of equal height screw is equipped with second spring, second spring is arranged in the top of rotary cutting punch.

[0006] It is further preferred that the top of the guiding block is provided with an upper pad block, the upper pad block is movably arranged in the upper backing plate, the first spring is arranged in the upper die holder, the lower end of the first spring is connected with the upper pad block, that is, the resetting of the guiding block is realized by the arrangement of the first spring and the upper pad block.

[0007] It is further preferred that the upper pad block is fixedly connected with the guiding block to ensure the synchronous movement of the upper pad block and the guiding block, the rotary cutting guide rail is fixedly arranged in the upper fixed plate, the cross section of the upper pad block is smaller than that of the guiding block to prevent the upper pad block from contacting with the rotary cutting guide rail and affecting the movement of the guiding block.

[0008] It is further preferred that the lower of the guiding block is provided with a lower pad block for limiting the downward position of the guiding block, the lower pad block is sleeved on the outer side of the rotary cutting punch, a fixing seat is arranged between the rotary cutting punch and the lower pad block to realize the mounting of the rotary cutting punch.

[0009] It is further preferred that the rotary cutting punch and the fixing seat are loosely matched to ensure the mounting quality of the rotary cutting punch, the fixing seat and the lower pad block are tightly matched, the lower pad block and the guiding block are fixedly connected through a pin to realize the fixed connection of the rotary cutting punch, the fixing seat, the lower pad block and the guiding block, forming a fixed whole.

[0010] It is further preferred that a plurality of equal height supporting blocks symmetrically arranged are mounted on the lower die plate, the upper end of the equal height supporting block is arranged on the cover plate and below the lower pad block to limit the downward position of the lower pad block, that is, to limit the downward position of the rotary cutting punch to ensure the accuracy of the rotary cutting position.

[0011] Further preferably, a stripper block is arranged in the rotary cutting knife, and the rotary cutting knife is in gap cooperation with the stripper block, so that the stripper block can move up and down in the rotary cutting punch, and cooperates with the third spring to realize self-adaption to the product height and facilitate the product to be pushed out from the rotary cutting knife; and the rotary cutting knife is fixed in the lower die plate and is in light knock cooperation, so that the installation quality of the rotary cutting knife is ensured.

[0012] Further preferably, a stripper block is arranged in the rotary cutting knife, and the rotary cutting knife is in gap cooperation with the stripper block, so that the stripper block can move up and down in the rotary cutting punch, and cooperates with the third spring to realize self-adaption to the product height and facilitate the product to be pushed out from the rotary cutting knife; and the rotary cutting knife is fixed in the lower die plate and is in light knock cooperation, so that the installation quality of the rotary cutting knife is ensured.

[0013] Beneficial effects: the rotary cutting die with the double-guide structure has the following beneficial effects: the two guide convex parts are arranged on the single side surface of the guide block, the two matched contact convex parts are arranged on the corresponding rotary cutting guide rail, the double-guide structure is formed, the guide of the guide block is stable and smooth, the rotary cutting process of the rotary cutting punch is more stable and smooth, the deviation of the rotary cutting punch is small, the stability is high, the rotary cutting port of the product is more flat, the port flatness is high, the gap control of the rotary cutting punch and the rotary cutting knife is good, the rotary cutting punch and the rotary cutting knife are not easy to be damaged, the spare part cost and the mold repairing frequency are reduced, the structure of the double-guide structure is stable, the die punching frequency is effectively reduced, and the production efficiency is improved; the rotary cutting copying positioning head and the stripper block are arranged, the position of the product is accurately positioned, and the rotary cutting quality is high; the equal-height screw and the second spring are arranged, and the equal-height screw cooperates with the rotary cutting punch and the rotary cutting copying positioning head, so that the rotary cutting of the rotary cutting punch is smooth. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 The common structure diagram of the rotary cutting structure in the rotary cutting type forming die disclosed by the background technology of the utility model is shown;

[0015] Figure 2 The structure diagram of the rotary cutting die with the double-guide structure disclosed by the utility model embodiment is shown;

[0016] Figure 3 The structure diagram of the rotary cutting structure with the double-guide structure disclosed by the utility model embodiment is shown;

[0017] Figure 4 The state structure diagram when the rotary cutting copying positioning head is just introduced into the product is shown;

[0018] Figure 5 The state structure diagram when the rotary cutting punch starts to rotate and cut is shown.

[0019] Mark No. : 1 - upper die holder, 2 - upper backing plate, 3 - upper fixed plate, 4 - cover plate, 5 - lower die plate, 6 - lower backing plate, 7 - lower die holder, 8 - guide block, 81 - guide convex part, 9 - rotary cutting guide rail, 91 - contact convex part, 10 - upper backing block, 11 - first spring, 12 - lower backing block, 13 - fixed seat, 14 - rotary cutting punch, 15 - rotary cutting profiling positioning head, 16 - equal height screw, 17 - second spring, 18 - rotary cutting knife edge, 19 - stripping block, 20 - equal height supporting block, 21 - ejector rod, 22 - third spring, 23 - product. DETAILED DESCRIPTION

[0020] The following is a specific embodiment of the utility model and in combination with the drawings, the technical scheme of the utility model is further described, but the utility model is not limited to these embodiments.

[0021] As Figures 2-5 shown, a rotary cutting die with double guide structure, by the single side guide convex part 81 of guide block 8 is set to two, form double guide structure, so that the rotary cutting process is more stable, smooth, effectively improve the production efficiency. The rotary cutting die includes upper die holder 1, upper backing plate 2, upper fixed plate 3, cover plate 4, lower die plate 5, lower backing plate 6 and lower die holder 7 arranged in turn from top to bottom, and four rotary cutting guide rails 9 arranged on the upper fixed plate 3, four rotary cutting guide rails 9 are enclosed into a rectangle, four rotary cutting guide rails 9 are provided with guide block 8 matched therewith in the middle, the upper side of guide block 8 is provided with first spring 11, the lower side of guide block 8 is connected with rotary cutting punch 14, rotary cutting knife edge 18 matched with rotary cutting punch 14 is arranged in lower die plate 5. Among them, upper die holder 1, upper backing plate 2, upper fixed plate 3, cover plate 4 and guide block 8, rotary cutting guide rail 9, first spring 11 and rotary cutting punch 14 form upper die structure; lower die plate 5, lower backing plate 6, lower die holder 7 and rotary cutting knife edge 18 form lower die structure, when the die is closed, the upper die structure is lowered as a whole, through the cooperation of rotary cutting punch 14 and rotary cutting knife edge 18, the product 23 is cut off, through the double guide cooperation of rotary cutting guide rail 9 and guide block 8, rotary cutting punch 14 is driven to move along the set track, the rotary cutting action of product 23 is realized, the product is cut off, so that the cut end of product 23 is more flat, which can meet the end flatness requirement of high-end product.

[0022] In the present application, two guide protrusions 81 are arranged at the upper and lower ends of each side of the guide block 8, and two contact protrusions 91 corresponding to the guide protrusions 81 are arranged on each rotary cutting rail 9 opposite to the side of the guide block 8. Therefore, each single side of the guide block 8 has two guide points, i.e. two guide protrusions 81, and the two opposite sides of the guide block 8 have four guide points, i.e. four guide protrusions 81 on the left and right sides of the guide block 8 and four guide protrusions 81 on the front and back sides of the guide block 8. Correspondingly, the two rotary cutting rails 9 on the left and right sides of the guide block 8 have four contact points, i.e. four contact protrusions 91, and the two rotary cutting rails 9 on the front and back sides of the guide block 8 have four contact points, i.e. four contact protrusions 91. This ensures that the four guide protrusions 81 of the opposite two sides of the guide block 8 move simultaneously during the downward movement of the rotary cutting rail 9 relative to the guide block 8, and are in contact with the four contact protrusions 91 on the corresponding two rotary cutting rails 9, so that the guide block 8 slightly deviates upward, downward, frontward and rearward, effectively controls the deviation of the rotary cutting head 14 relative to the rotary cutting edge 18, effectively controls the gap between the rotary cutting head 14 and the rotary cutting edge 18, has high stability, effectively cuts the product 23, and the rotary cutting port is more stable. The flatness can be controlled within 0.02 mm, the port flatness is high, the mold is not easy to break, the cost of spare parts and the frequency of mold repair are reduced, the mold stroke can be increased from the existing 60 to 100, and the production efficiency is high.

[0023] In the present application, a rotary cutting profiling positioning head 15 is arranged below the rotary cutting head 14, an equal-height screw 16 is connected between the rotary cutting head 14 and the rotary cutting profiling positioning head 15, the rotary cutting head 14 is movably connected with the equal-height screw 16, the rotary cutting profiling positioning head 15 is fixedly connected with the equal-height screw 16, and a second spring 17 is arranged at the upper end of the equal-height screw 16 and above the rotary cutting head 14. That is, through the design of the rotary cutting profiling positioning head 15, the positioning of the product 23 is realized, and the rotary cutting profiling positioning head 15 can also play a supporting and limiting role. When the mold is closed, the rotary cutting profiling positioning head 15 moves downward synchronously with the rotary cutting head 14, inserts into the product 23, and fixes the product 23 in the rotary cutting edge 18, so as to fix the position of the product 23 during rotary cutting, and has the effects of positioning and limiting, and supports the inside of the product 23, so as to ensure the rotary cutting precision and stability. Through the arrangement of the second spring 17, the equal-height screw 16 is used for connecting and fixing the rotary cutting profiling positioning head 15, so as to ensure that the rotary cutting profiling positioning head 15 is not moved during the rotary cutting process; the rotary cutting head 14 is movably connected with the equal-height screw 16, so as to ensure that the rotary cutting head 14 can move relative to the equal-height screw 16, i.e. to ensure that the rotary cutting action of the rotary cutting head 14 is effective.

[0024] In the scheme of the application, the upper pad block 10 is arranged above the guide block 8 and movably arranged in the upper pad plate 2, so that the upper pad block 10 can move up and down, and the guide block 8 can move up and down, that is, the guide block 8 can move up and down relative to the rotary cutting rail 9; the first spring 11 is arranged in the upper die seat 1, the lower end of the first spring 11 is connected with the upper pad block 10, and the first spring 11 provides a downward force for the upper pad block 10, so that the guide block 8 can return to the initial position in the mold opening state, that is, the first spring 11 has a resetting effect.

[0025] Based on the above scheme, the upper pad block 10 is fixedly connected with the guide block 8, that is, the synchronous movement of the upper pad block 10 and the guide block 8 is ensured; the rotary cutting rail 9 is fixed in the upper fixed plate 3, so that the rotary cutting rail 9 is installed; the cross section of the upper pad block 10 is smaller than that of the guide block 8, so that the upper pad block 10 and the rotary cutting rail 9 are prevented from contacting and colliding.

[0026] In the scheme of the application, the lower pad block 12 is arranged below the guide block 8 and sleeved outside the rotary cutting punch 14, and the fixed seat 13 is arranged between the rotary cutting punch 14 and the lower pad block 12, that is, the rotary cutting punch 14 is installed through the lower pad block 12 and the fixed seat 13, and the guide block 8, the lower pad block 12 and the fixed seat 13 are relatively independent, so that the machining of each component is facilitated, and different materials are selected for manufacturing, so that different performance requirements are met, and the cost is effectively saved.

[0027] Based on the above scheme, the rotary cutting punch 14 and the fixed seat 13 are slightly interference fitted, that is, the rotary cutting punch 14 and the fixed seat 13 are slightly interference fitted, so that the firmness of the installation of the rotary cutting punch 14 is ensured, and the installation quality of the rotary cutting punch 14 is ensured, and the rotary cutting punch 14 will not be damaged due to installation; the fixed seat 13 is tightly fitted with the lower pad block 12, so that the firmness of the installation of the fixed seat 13 is ensured; the lower pad block 12 and the guide block 8 are fixedly connected through the pin, so that the installation of the lower pad block 12 is realized.

[0028] Based on the above scheme, a plurality of equal-height support blocks 20 are symmetrically arranged on the lower die plate 5, the upper end of the equal-height support block 20 is arranged on the cover plate 4 below the lower pad block 12, that is, the equal-height support block 20 limits the downward position of the lower pad block 12, and then limits the downward position of the rotary cutting punch 14, so that the rotary cutting position of the product 23 is accurate.

[0029] In the scheme of the application, the stripping block 19 is arranged in the rotary cutting knife 18, which is used to support the bottom of the product 23 and cooperate with the rotary cutting profiling positioning head 15 to ensure the stability of the product 23 during rotary cutting, and is used for stripping and discharging the product 23 after rotary cutting; the rotary cutting knife 18 is gap-fitted with the stripping block 19, so that the stripping block 19 can move up and down in the rotary cutting knife 18, and the lower end of the product 23 is pressed against the stripping block 19 and the product 23 is ejected from the rotary cutting knife 18; the rotary cutting knife 18 is fixed in the lower die plate 5 and is lightly knocked, so as to ensure the installation firmness and quality of the rotary cutting knife 18 and prevent damage caused by installation.

[0030] Based on the above scheme, the stripping block 19 is abutted by the ejector rod 21, the ejector rod 21 is movably inserted into the lower base plate 6, the lower end of the ejector rod 21 is connected with the third spring 22, and the third spring 22 provides an upward force to the ejector rod 21, that is, the third spring 22 is arranged in the lower die seat 7, so as to ensure that the stripping block 19 can always press against the lower end of the product 23 and eject the product 23 from the rotary cutting knife 18 in the mold opening state, and can adapt to the rotary cutting of products 23 with different heights and sizes. Moreover, the scheme of the application is not limited to using the third spring 22, and a ejection cylinder can also be used to eject the product 23.

[0031] In the application, the working process of the rotary cutting mold is as follows:

[0032] The mold is closed, the upper mold structure and the connecting components are lowered as a whole, the upper die seat 1, the upper base plate 2, the upper fixed plate 3, the cover plate 4, the guide block 8, the rotary cutting rail 9, the upper base block 10, the first spring 11, the lower base block 12, the fixed seat 13, the rotary cutting punch 14 and the rotary cutting profiling positioning head 15 move downward synchronously, the rotary cutting profiling positioning head 15 is introduced into the product 23, and with continuous downward movement, the rotary cutting profiling positioning head 15 and the product 23 press the stripping block 19 together into the rotary cutting knife 18, and the positioning process of the product 23 is completed. At this time, the equal-height supporting block 20 just contacts the lower base block 12, the equal-height supporting block 20 moves against the lower base block 12, the upper base block 10, the guide block 8, the lower base block 12, the fixed seat 13, the rotary cutting punch 14 and the rotary cutting profiling positioning head 15 no longer continue to move downward, and the upper die seat 1, the upper base plate 2, the upper fixed plate 3, the cover plate 4 and the rotary cutting rail 9 continue to move downward. At this time, the rotary cutting rail 9 moves downward relative to the guide block 8, the guide convex portion 81 on the guide block 8 and the contact convex portion 91 of the rotary cutting rail 9 are in contact, the guide block 8 is driven to make a slight deflection along the rotary cutting rail 9, and the rotary cutting punch 14 is also made to make a slight deflection, that is, the rotary cutting punch 14 moves along the set track under the action of the rotary cutting rail 9, so as to realize the rotary cutting of the product 23, until the rotary cutting process is completed.

[0033] The mold is opened, the whole upward movement of the upper mold structure and the connecting part, the guiding block 3 carries the rotary cutting punch 14 to start the reset action of returning along the rotary cutting guide rail 9, until the mold is completely opened, at this time the stripping block 19 is under the joint action of the ejector rod 21 and the third spring 22 and the rotary cutting product 23 is ejected from the rotary cutting cutting edge 18.

[0034] The reset process, the upper mold starts to move upward, the guiding block 3 carries the rotary cutting punch 8 to start the reset action of returning along the rotary cutting guide rail 4, until the mold is completely opened.

[0035] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application are described in detail, for those skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application, should be included in the scope of the present application.

Claims

1. A rotary cutting die with a dual-guide structure, comprising, from top to bottom, an upper die base (1), an upper pad (2), an upper fixing plate (3), a cover plate (4), a lower die plate (5), a lower pad (6), and a lower die base (7), wherein the upper fixing plate (3) is provided with four rotary cutting guide rails (9), the four rotary cutting guide rails (9) forming a rectangle, and a guide block (8) cooperating with the four rotary cutting guide rails (9) is provided in the middle of the four rotary cutting guide rails (9), a first spring (11) is provided above the guide block (8), a rotary cutting punch (14) is connected below the guide block (8), and a rotary cutting blade (18) cooperating with the rotary cutting punch (14) is provided in the lower die plate (5), characterized in that: The upper and lower ends of each side of the guide block (8) are provided with two guide protrusions (81), and each of the rotary cutting guide rails (9) is provided with two contact protrusions (91) matched with the guide protrusions (81) relative to the side of the guide block (8). The lower side of the rotary cutting punch (14) is provided with a rotary cutting profiling positioning head (15), and the rotary cutting punch (14) and the rotary cutting profiling positioning head (15) are connected with an equal-height screw (16). The rotary cutting punch (14) is movably connected with the equal-height screw (16), the rotary cutting profiling positioning head (15) is fixedly connected with the equal-height screw (16), and the upper end of the equal-height screw (16) is provided with a second spring (17). The second spring (17) is arranged above the rotary cutting punch (14).

2. A rotary cutting die having a dual guide structure according to claim 1, characterized in that: The upper side of the guide block (8) is provided with an upper cushion block (10), and the upper cushion block (10) is movably arranged in the upper cushion plate (2). The first spring (11) is arranged in the upper die seat (1), and the lower end of the first spring (11) is connected with the upper cushion block (10).

3. A rotary cutting die having a dual guide structure according to claim 2, characterized in that: The upper cushion block (10) is fixedly connected with the guide block (8), the rotary cutting guide rail (9) is fixedly arranged in the upper fixed plate (3), and the cross section of the upper cushion block (10) is smaller than that of the guide block (8).

4. The rotary cutting die with double guide structure according to claim 1, characterized in that: The lower side of the guide block (8) is provided with a lower cushion block (12), and the lower cushion block (12) is arranged on the outer side of the rotary cutting punch (14). The rotary cutting punch (14) and the lower cushion block (12) are provided with a fixing seat (13).

5. A rotary cutting die having a dual guide structure according to claim 4, characterized in that: The rotary cutting punch (14) is lightly matched with the fixing seat (13), the fixing seat (13) is tightly matched with the lower cushion block (12), and the lower cushion block (12) and the guide block (8) are fixedly connected through a pin.

6. A rotary cutting die having a dual guide structure according to claim 4, characterized in that: The lower die plate (5) is provided with a plurality of equal-height support blocks (20) arranged symmetrically, the upper end of the equal-height support block (20) is arranged on the cover plate (4) and below the lower cushion block (12).

7. The rotary cutting die with double guide structure according to claim 1, characterized in that: The rotary cutting knife edge (18) is provided with a material stripping block (19), the rotary cutting knife edge (18) is gap matched with the material stripping block (19), and the rotary cutting knife edge (18) is fixedly arranged in the lower die plate (5) and is lightly matched.

8. A rotary cutting die having a dual guide structure according to claim 7, characterized in that: The lower side of the material stripping block (19) is abutted with a ejector rod (21), the ejector rod (21) is movably arranged in the lower cushion plate (6), the lower end of the ejector rod (21) is connected with a third spring (22), and the third spring (22) is arranged in the lower die seat (7).

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