An equidistant slitting device for plastic plate production

Abstract

This invention provides an equidistant slitting device for plastic sheet production. The device includes a base and a set of mold frames located above the base. The base has a cutting area and transition and rotation areas on either side of the cutting area. The mold frames frame and limit the plastic sheet on the base, and under the drive of a drive unit, push the plastic sheet back and forth linearly between the transition and rotation areas. When passing through the cutting area, the plastic sheet is equidistantly slit by multiple sets of saw blades within the cutting area. The mold frames include a base plate and side plates surrounding the base plate for engaging with the plastic sheet. The side plates have transverse and longitudinal through-slots for the saw blades to pass through. The base plate has transverse grooves that are linearly connected to the transverse through-slots and longitudinal grooves that are linearly connected to the longitudinal through-slots. This invention facilitates batch and rapid equidistant slitting operations without requiring continuous positioning during slitting, thus greatly improving slitting efficiency.

Description

Technical Field

[0001] This invention relates to a slitting device, and more particularly to an equidistant slitting device for plastic sheet production. Background Technology

[0002] Plastic sheets, a synthetic material widely used in construction, chemical, and furniture industries, often require slitting to specific dimensions during production. Traditional slitting methods rely primarily on manual measurement and marking, which is not only inefficient but also prone to errors leading to material waste. While some cutting devices have attempted to address these issues, they still have many shortcomings. For example, patent CN220576027U proposes a plastic sheet equidistant cutting machine, which can achieve automatic cutting. However, when it is necessary to perform both horizontal and vertical cuts to obtain equidistant small pieces, the process becomes cumbersome, time-consuming, and labor-intensive.

[0003] Therefore, there is an urgent need for a plastic sheet equidistant cutting device that can achieve high efficiency, precision and adaptability to various sizes. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an equidistant slitting device for plastic sheet production, which can more easily and quickly complete the equidistant slitting operation in batches, and does not require constant positioning during slitting, thereby greatly improving the slitting efficiency.

[0005] This invention provides the following technical solution: A plastic sheet production equidistant slitting device includes a set of bases for horizontally supporting the plastic sheet for planar movement and a set of mold frames located above the bases. The bases are equipped with a cutting area and transition and rotation areas on either side of the cutting area. The mold frames are used to frame and limit the plastic sheet on the bases, and, driven by a drive unit, push the plastic sheet linearly back and forth between the transition and rotation areas. When passing through the cutting area, the plastic sheet is equidistantly slit by multiple sets of saw blades within the cutting area. The mold frames include a base plate and side plates surrounding the base plate for engaging with the periphery of the plastic sheet. The side plates have transverse and longitudinal through slots for the saw blades to pass through. The base plate has transverse grooves linearly connected to the transverse through slots and longitudinal grooves linearly connected to the longitudinal through slots. Its technological advantage lies in achieving full automation and high efficiency in plastic sheet slitting. Through the cooperation between the base and the mold frame, the plastic sheet is stably positioned and automatically passes through the cutting zone under the drive unit, avoiding errors caused by traditional manual measurement and marking, significantly improving slitting accuracy and efficiency. The transverse and longitudinal through slots on the mold frame cooperate with the grooves on the base plate, allowing the saw blade assembly to pass smoothly during cutting, ensuring a smooth and interference-free cutting process. This design allows for two cuts—transverse and longitudinal—to be completed in a single clamping, reducing repetitive positioning time, making it particularly suitable for mass production, improving slitting efficiency, and reducing material waste.

[0006] Preferably, the base plate of the mold frame is mounted on the drive end of the turntable, and the turntable is mounted on the drive end of the pressure cylinder. The pressure cylinder is mounted on a set of nut sliders. The nut sliders reciprocate linearly between the transition zone and the indexing zone under the drive of the lead screw, so that the mold frame can rotate a certain angle through the turntable and achieve lifting and lowering movement through the pressure cylinder. Moreover, the center of the turntable is coaxially distributed with the center of the base plate of the mold frame to accommodate the equidistant cutting of square plastic sheets.

[0007] Its technical advantages lie in enhanced adaptability and ease of operation. The drive design of the turntable and pressure cylinder allows the mold frame to rotate precisely 90° and rise and fall, enabling a quick switch from transverse to longitudinal cutting without re-clamping the plastic sheet, thus shortening the cutting cycle. The turntable and base plate are coaxially distributed, ensuring that the square plastic sheet remains balanced during rotation, avoiding cutting deviations, and making it particularly suitable for processing standard square workpieces.

[0008] Preferably, the cutting area has multiple sets of cutting holes, and each set of cutting holes houses a set of saw blades. The multiple sets of cutting holes are arranged in an isosceles triangle, wherein the base of the isosceles triangle is perpendicular to the lead screw, and the cutting holes on the base are equidistantly distributed, as are the cutting holes on the waist. The saw blade set includes a U-shaped guide block installed in the cutting hole, and a set of sliders is horizontally slidably installed in the U-shaped guide block. One end of the slider is connected to an adjusting cylinder for adjusting its position along the base of the triangle under the drive of the adjusting cylinder.

[0009] Its technical advantages lie in achieving flexible and adjustable cutting spacing and diverse slitting modes. The isosceles triangular arrangement of the cutting holes allows switching between transverse and longitudinal cutting modes by selecting different saw blade sets (base or waist), enabling the device to adapt to various slitting needs (such as strip or block products). The sliding design of the U-shaped guide block and slider, combined with the adjusting cylinder, allows for fine-tuning of the saw blade unit position, with a spacing adjustment range of 5-50mm, meeting the customized production needs of plastic sheets of different sizes. This arrangement improves space utilization, reduces the equipment's footprint, and simultaneously ensures uniform cutting force distribution, extending saw blade life.

[0010] Preferably, a set of saw blade units is installed inside the slider. The saw blade units rotate under the drive of a rotary motor to protrude from the base surface for cutting. A lifting cylinder is installed at the bottom of the base to drive the U-shaped guide block to rise and fall, so that the saw blade units fall below the base surface when not in operation. The adjusting cylinder is used to fine adjust the horizontal gap between two adjacent sets of saw blade units.

[0011] Its technical advantages lie in improved cutting safety and precision. The saw blade unit rotates at high speed driven by a rotary motor, ensuring a smooth, burr-free cut surface and enhancing product quality. The lifting cylinder retracts the saw blade unit below the base when not in use, and the fine-tuning function of the adjusting cylinder for the saw blade gap allows for quick adaptation to different cutting sizes, reducing mold change time. It is particularly suitable for small-batch, multi-variety production, significantly improving overall equipment utilization.

[0012] Preferably, the mold frame can be replaced with a set of mold bases and four pairs of mold frames arranged around the mold bases. A set of lead screws and a set of guide rods are installed between each pair of mold frames. The lead screws are interchangeably installed on the corresponding mold frames. Two sets of parallel transverse connecting rods and two sets of parallel longitudinal connecting rods are provided on the side of the mold base away from the turntable. The two sets of longitudinal connecting rods pass perpendicularly through the two sets of transverse connecting rods to form a rectangular distribution.

[0013] Its technological advantage lies in enhancing the device's adaptability to plastic sheets of different sizes. Through the modular structure of the mold frame, lead screw, and guide rods, the position of the limiting frame is adjustable, allowing for quick adaptation to rectangular plastic sheets ranging from small to large, reducing equipment modification costs. The rectangularly distributed connecting rods ensure limiting stability, preventing sheet displacement during cutting and significantly improving cutting accuracy. This design is particularly suitable for flexible production scenarios involving multiple varieties and small batches.

[0014] Preferably, the two ends of the transverse connecting rod and the longitudinal connecting rod are respectively screwed onto the outside of the lead screw by the first hanger and guided onto the outside of the guide rod by the second hanger. A set of limiting frames are detachably connected to the transverse connecting rod and the longitudinal connecting rod by screws. The four sets of limiting frames are used to limit the perimeter of the rectangular plastic plate.

[0015] Its technical advantages lie in achieving rapid adjustment and high reliability. The lead screw and guide rod are connected by a hanger, allowing for fine-tuning of the limit frame in both horizontal and vertical directions, significantly reducing adjustment time compared to traditional methods. The detachable screw design makes frame replacement convenient and reduces maintenance costs. Four sets of limit frames form a closed-loop limit, effectively preventing vibration of the plastic sheet during high-speed cutting, ensuring cutting straightness, and greatly improving product qualification rate.

[0016] Preferably, each set of limiting frames includes vertical plates and horizontal plates distributed at right angles. The vertical plates are provided with cutting grooves for the saw blade unit to pass through. The horizontal plates are provided with abutment posts corresponding to two adjacent sets of cutting grooves. The abutment posts are used to press the plastic plate on the substrate so that its top surface is lower than the bottom of the cutting groove.

[0017] Its technical advantages lie in improving the stability and quality of the cutting process. The cutting grooves on the vertical plate provide a precise channel for the saw blade, avoiding cutting interference; the abutment posts on the horizontal plate press against the plastic sheet, ensuring that its top surface is lower than the bottom of the groove, thus ensuring consistent cutting depth and preventing overcutting or undercutting. Furthermore, the distribution of the abutment posts disperses the clamping force, preventing damage to the sheet surface.

[0018] Preferably, the operation method of the device includes: after the mold frame limits the plastic sheet, it moves from the transition zone to the indexing zone. When passing the cutting zone, a row of saw blades located on the base of the isosceles triangle is driven to protrude from the base, completing the first equidistant cutting; then the mold frame rotates 90 degrees in the indexing zone and moves from the indexing zone to the transition zone. When passing the cutting zone, two rows of saw blades located on the waist of the isosceles triangle are driven to protrude from the base, completing the second equidistant cutting, thereby realizing the equidistant cutting of the plastic sheet in the transverse and longitudinal directions.

[0019] Its technical advantage lies in achieving a highly efficient two-step cutting process. Equidistant cutting can be completed with only two cuts (horizontal and vertical), saving time compared to traditional multi-step operations. The isosceles triangular saw blade arrangement allows for rapid switching between cutting modes without the need to change tools, making operation highly convenient. This method is suitable for mass production, and automated control reduces human error, resulting in high product dimensional consistency.

[0020] Preferably, the cutter holes arranged in an isosceles triangle allow for adjustment of the saw blade group position to accommodate different cutting intervals. During the first equidistant cut, a row of saw blades located on the base of the isosceles triangle is driven to protrude from the base to complete the transverse cut. After the mold frame rotates, two rows of saw blades located on the waist of the isosceles triangle are driven to protrude from the base to complete the longitudinal cut, thereby achieving batch processing of different sizes.

[0021] Its technical advantages lie in improving the versatility and economy of the equipment. The isosceles triangular arrangement allows for fine-tuning of the saw blade position via an adjusting cylinder, and the cutting spacing can be steplessly adjusted within the range of 10-100mm, meeting the slitting needs from small, fine pieces to large slabs. This design reduces the number of specialized molds, increases equipment adaptability, and lowers production costs. During batch processing, it enables rapid switching of product specifications, improving production line utilization.

[0022] Preferably, the drive assembly includes a combination of a lead screw and a nut slider for precisely controlling the linear motion of the mold frame; the saw blade assembly in the cutting area protrudes from the base surface during operation and retracts when not in operation to ensure operational safety and equipment lifespan.

[0023] Its technical advantage lies in ensuring the reliability and safety of the device during long-term operation.

[0024] The beneficial effects of this invention are: 1. Significantly improved slitting efficiency: Through the automated cooperation between the mold frame and the base, automatic positioning and continuous slitting of plastic sheets are achieved; traditional slitting methods require multiple manual positioning and cutting, while this invention only requires two cutting movements (horizontal and longitudinal) to complete equidistant slitting, which can significantly improve slitting efficiency compared to traditional methods, and is particularly suitable for mass production scenarios; 2. Significantly improved cutting accuracy: The precise positioning structure of the mold frame combined with the isosceles triangular saw blade arrangement in the cutting area ensures the accuracy of the cutting position and rapid adaptive adjustment; 3. Enhanced ease of operation and adaptability: The design of the turntable driving the mold frame to rotate 90° enables seamless switching from horizontal to vertical cutting without the need to re-clamp the workpiece; the adjustable spacing of the saw blade assembly (adjustment range 5-100mm) allows the device to adapt to different slitting requirements, greatly improving the equipment's versatility. 4. Reduced maintenance costs and energy consumption: Modular design makes major components easy to replace and maintain, and independent drive of the saw blade unit reduces overall energy consumption; 5. Adaptable to multiple production modes: The second mold frame design, through adjustable limiting borders, can quickly adapt to rectangular plastic sheets of different sizes, meeting the flexible production needs of multiple varieties and small batches, and reducing the investment cost of special tooling. Attached Figure Description

[0025] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram showing the distribution of the transposition area, cutting area, and transition area on the substrate; Figure 2 Is following Figure 1 A schematic diagram of the structure after the second cut was completed; Figure 3 This is a top-view diagram showing the distribution of the saw blade assembly in the cutting area; Figure 4 This is a top view of a set of cutting blades; Figure 5 This is a bottom view of the mold frame in Example 1; Figure 6 yes Figure 5 Front view installation diagram of the middle mold frame; Figure 7 This is a front view installation diagram of a set of limiting borders in the module frame of Embodiment 2; Figure 8 yes Figure 7 Top view of the middle mold frame; Figure 9 yes Figure 7 A bottom view of the middle mold frame; Figure 10 This is a structural diagram of a set of limiting borders; Figure 11 yes Figure 10 A schematic diagram of the cross-section of AA in the diagram; Figure 12 This is a schematic diagram of the structure when the plastic sheet is positioned between two sets of relative limiting frames and passes through the saw blade unit; Markings in the diagram: 1. Base; 2. Indexing area; 3. Cutting area; 4. Transition area; 5. Mold frame; 6. Saw blade assembly; 7. Turntable; 8. Pressure cylinder; 9. Lead screw; 10. Plastic sheet; 51. Base plate; 52. Side plate; 53. Horizontal through slot; 54. Longitudinal through slot; 55. Horizontal groove; 56. Longitudinal groove; 61. U-shaped guide block; 62. Slider; 63. Saw blade unit; 64. Adjusting cylinder; 65. Rotary motor; 91. Mold bottom; 92. Mold frame; 93. Lead screw; 94. Guide rod; 95. Horizontal connecting rod; 96. Longitudinal connecting rod; 97. Limiting frame; 98. Through slot; 99. First hanger; 910. Second hanger; 971. Vertical plate; 972. Horizontal plate; 973. Cutting groove; 974. Abutment post. Detailed Implementation

[0026] Example 1 like Figure 1-6 As shown, an equidistant slitting device for producing plastic sheet 10 includes, in this embodiment, a set of bases 1 for horizontally supporting the plastic sheet 10 to perform planar movement and a set of mold frames 5 located above the bases 1. The bases 1 are provided with a cutting area 3 and a transition area 4 and a rotation area 2 located on both sides of the cutting area 3. The mold frames 5 are used to frame and limit the plastic sheet 10 on the bases 1, and under the drive of the drive group, push the workpiece back and forth in a straight line between the transition area 4 and the rotation area 2 through the cutting area 3. The cutting area 3 has multiple sets of cutting holes, and each set of cutting holes is fitted with a set of saw blades 6 protruding from the base 1. When the mold frame 5 limits the plastic sheet 10 and moves from the transition area 4 to the indexing area 2 under the drive of the drive group, the first equidistant cutting of the plastic sheet 10 is completed when passing through the cutting area 3. The mold frame 5 includes a set of base plates 51 and side plates 52 surrounding the base plates 51 for cooperating with the periphery of the plastic sheet 10. The side plates 52 have transverse through slots 53 for the saw blades 6 to pass through one by one. The base plates 51 have transverse grooves 55 that are linearly connected to the transverse through slots 53. The base plates 51 are mounted on the drive end of the turntable 7, and the turntable 7 is mounted on the drive end of the pressure cylinder 8. The pressure cylinder 8 is mounted on a set of On the nut slider 62, the nut slider 62 reciprocates linearly between the transition zone 4 and the indexing zone 2 under the drive of the lead screw 9; after the plastic plate 10 completes the first equidistant cutting movement to the indexing zone 2, the mold frame 5 rotates 90° under the drive of the turntable 7. The side plate 52 is also provided with a longitudinal through groove 54 that is perpendicular to the transverse through groove 53, and the bottom plate 51 is provided with a longitudinal groove 56 that is linearly connected to the longitudinal through groove 54. When the mold frame 5 moves from the indexing zone 2 to the transition zone 4 again under the drive of the lead screw 9, the longitudinal through groove 54 and the longitudinal groove 56 are used for the saw blade group 6 of the cutting zone 3 to cut through. The pressure cylinder 8 is used to lift the mold frame 5 away from the cut plastic plate 10, and to align the new plastic plate 10 to be cut when pressing down.

[0027] In order to better accommodate the equidistant cutting of the square plastic sheet 10, the center of the base plate 51 and the center of the turntable 7 are set to be coaxially distributed; To better accommodate various cutting intervals in both the horizontal and vertical directions, the multiple sets of cutting holes in the cutting area 3 are arranged in an isosceles triangle. The base of this isosceles triangle is perpendicular to the lead screw 9, and the cutting holes on the base of the isosceles triangle are equidistantly distributed. The cutting holes on the legs of the isosceles triangle are also equidistantly distributed. When performing the first equidistant cutting, a row of saw blades 6 located on the base of the isosceles triangle can be driven to protrude from the base 1 to achieve the first sawing of the plastic sheet 10. Then, in the indexing area 2, the turntable 7 drives the mold frame 5 to rotate the plastic sheet 10 by a certain angle, such as 90°. Then, the mold frame 5 drives the plastic sheet 10 to move from the indexing area 2 to the transition area 4 to pass through the cutting area 3. In section 3, a row of saw blades 6 located on the base of the isosceles triangle can be driven to retract to the base 1, while two rows of saw blades 6 located on the waist of the isosceles triangle protrude from the base 1, thereby achieving a second sawing of the plastic sheet 10. After sawing, the mold frame 5 rises and detaches from the plastic sheet 10. At this time, the plastic sheet 10 can be cut into multiple groups of small pieces with equal spacing in the horizontal and vertical directions. Only two cutting operations are required, which is more convenient and has higher processing efficiency. The small pieces cut at this time can be batched and processed quickly with different widths of horizontal and vertical cutting by adjusting the horizontal spacing of the two rows of saw blades 6 on the waist and the horizontal spacing of the row of saw blades 6 on the base. It can also adapt to various cutting size requirements and has better convenience. The saw blade assembly 6 includes a U-shaped guide block 61 installed in the cutter hole. A set of sliders 62 are horizontally slidably installed inside the U-shaped guide block 61. One end of the slider 62 is connected to an adjusting cylinder 64 and is used to adjust its position along the base of the triangle under the drive of the adjusting cylinder 64. A set of saw blade units 63 are also installed inside the slider 62. The saw blade units 63 are used to rotate under the drive of a rotary motor 65 to protrude from the table surface of the base 1 to perform rotational cutting on the plastic sheet 10. A lifting cylinder is also installed at the bottom of the base 1 to drive the U-shaped guide block 61 to rise and fall. When not in operation, the lifting cylinder is used to drive the U-shaped guide block 61 to lower the saw blade units 63 below the table surface of the base 1. The adjusting cylinder 64 is used to fine-tune the horizontal gap between two adjacent sets of saw blade units 63.

[0028] Example 2 like Figure 7-12As shown, a cross-sectional view of an equidistant slitting device for producing plastic sheets 10 is provided. In this embodiment, the difference from Embodiment 1 is that, to more conveniently adapt to the slitting of rectangular plastic sheets 10 of different sizes, the mold frame 5 is replaced with a set of mold bases 91 and four pairs of mold frames 92 arranged around the mold bases 91. A set of lead screws 93 and a set of guide rods 94 are mounted between each pair of mold frames 92, and the lead screws 93 are flexibly mounted on the corresponding mold frames 92. Two sets of parallel transverse connecting rods 95 and two sets of parallel longitudinal connecting rods 96 are provided on the side of the mold base 91 away from the turntable 7. The two sets of longitudinal connecting rods 96 pass vertically through the two sets of transverse connecting rods 95. The two sets of transverse connecting rods 95 and the two sets of longitudinal connecting rods 96 are rectangularly distributed, with the ends of the transverse connecting rods 95 and the longitudinal connecting rods 96 respectively... The first hanger 99 is screwed onto the outside of the lead screw 93, and the second hanger 910 guides it onto the outside of the guide rod 94. The middle of the transverse connecting rod 95 is also provided with a through slot 98 for the transverse connecting rod 95 to pass through. A set of limiting frames 97 are detachably connected to the transverse connecting rod 95 and the longitudinal connecting rod 96 by screws. The four sets of limiting frames 97 are used to limit the periphery of the rectangular plastic block. Each set of limiting frames 97 includes a vertical plate 971 and a horizontal plate 972 distributed at right angles. The vertical plate 971 is provided with a cutting groove 973 for the corresponding saw blade unit 63 to cut through. The horizontal plate 972 is provided with an abutment post 974 corresponding to the two adjacent sets of cutting grooves 973. The abutment post 974 is used to press the plastic plate 10 on the substrate so that its top surface is lower than the bottom of the cutting groove 973.

[0029] The working principle of this invention is: The present invention discloses an equidistant slitting device for plastic sheet production. Its core lies in the automatic positioning and two-stage cutting (horizontal and longitudinal) of the plastic sheet through the cooperation of the mold frame and the base, thereby efficiently completing equidistant slitting. Figure 1 As shown, the base 1 is provided with an indexing zone 2, a cutting zone 3, and a transition zone 4. The mold frame 5, driven by a drive assembly (such as a lead screw and nut slider), pushes the plastic plate to move linearly between the transition zone 4 and the indexing zone 2.

[0030] During the first cut, the mold frame 5 limits the plastic plate, moves from the transition zone 4 to the indexing zone 2, and when passing through the cutting zone 3, the saw blade assembly 6 protrudes from the base platform, completing the transverse cut through the transverse through-slot on the mold frame side plate. For example... Figure 5 and Figure 6 As shown, the mold frame 5 includes a base plate 51 and a side plate 52. The side plate 52 has a transverse through groove 53, and the base plate 51 has a transverse groove 54. The mold frame 5 is rotated and raised / lowered by a turntable 7 and a pressure cylinder 8.

[0031] After the plastic sheet moves to the indexing zone 2, the turntable 7 drives the mold frame 5 to rotate 90°. Then, the mold frame 5 returns from the indexing zone 2 to the transition zone 4. At this time, the saw blade assembly 6 completes longitudinal cutting through the longitudinal through slot 55 and the longitudinal groove 56. The saw blade assembly arrangement in the cutting zone 3 is as follows: Figure 3 As shown, it is an isosceles triangle, which facilitates adjustment of the cutting spacing. The specific structure of the saw blade assembly is as follows: Figure 4 As shown, it includes a U-shaped guide block 61, a slider 62, a saw blade unit 63, an adjustment cylinder 64, and a lifting cylinder, which can realize the lifting and lowering of the saw blade and the fine adjustment of the spacing.

[0032] For plastic sheets of different sizes, a second mold frame design can be used, such as... Figure 7 , Figure 8 As shown, the mold frame includes a mold base 91, a mold holder 92, a lead screw 93, a guide rod 94, a transverse connecting rod 95, and a longitudinal connecting rod 96. A limiting frame 97 is mounted on the connecting rod with screws, and its structure is as follows: Figure 10 and Figure 11 As shown, it includes a vertical plate 971 and a horizontal plate 972. The vertical plate 971 has a cutting groove 973, and the horizontal plate 972 has an abutment post 974 for limiting the plastic plate 10. Figure 12 This demonstrates the cutting state when the plastic sheet is in a limiting position.

[0033] The present invention achieves rapid and precise cutting of plastic sheets through the above structure. It can complete the horizontal and vertical equidistant cutting with only two cuts, which greatly improves efficiency and can adapt to various size requirements.

[0034] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An equidistant slitting device for plastic sheet production, characterized in that: The device includes a set of bases for horizontally supporting a plastic sheet for planar movement and a set of mold frames located above the bases. The bases are equipped with a cutting area and transition and rotation areas on either side of the cutting area. The mold frames are used to frame and limit the plastic sheet on the bases, and, driven by a drive unit, push the plastic sheet linearly back and forth between the transition and rotation areas. When passing through the cutting area, the plastic sheet is equidistantly cut by multiple sets of saw blades within the cutting area. The mold frames include a base plate and side plates surrounding the base plate for engaging with the periphery of the plastic sheet. The side plates have transverse and longitudinal through slots for the saw blades to pass through. The base plate has transverse grooves linearly connected to the transverse through slots and longitudinal grooves linearly connected to the longitudinal through slots.

2. The equidistant slitting device for plastic sheet production according to claim 1, characterized in that: The base plate of the mold frame is mounted on the drive end of the turntable, which is mounted on the drive end of the pressure cylinder. The pressure cylinder is mounted on a set of nut sliders. The nut sliders reciprocate linearly between the transition zone and the indexing zone under the drive of the lead screw, so that the mold frame can rotate a certain angle through the turntable and achieve lifting and lowering movement through the pressure cylinder. The center of the turntable is coaxially distributed with the center of the base plate of the mold frame to accommodate the equidistant cutting of square plastic sheets.

3. The equidistant slitting device for plastic sheet production according to claim 1, characterized in that: The cutting area has multiple sets of cutting holes, and each set of cutting holes houses a set of saw blades. The multiple sets of cutting holes are arranged in an isosceles triangle, wherein the base of the isosceles triangle is perpendicular to the lead screw, and the cutting holes on the base are equidistant from each other, as are the cutting holes on the waist. The saw blade set includes a U-shaped guide block installed in the cutting hole, and a set of sliders is horizontally slidably installed in the U-shaped guide block. One end of the slider is connected to an adjusting cylinder, which is used to adjust the position along the base of the triangle under the drive of the adjusting cylinder.

4. The equidistant slitting device for plastic sheet production according to claim 3, characterized in that: A set of saw blade units is installed inside the slider. The saw blade units rotate under the drive of a rotary motor to protrude from the base surface for cutting. A lifting cylinder is installed at the bottom of the base to drive the U-shaped guide block to rise and fall, so that the saw blade units fall below the base surface when not in operation. The adjusting cylinder is used to fine adjust the horizontal gap between two adjacent sets of saw blade units.

5. The equidistant slitting device for plastic sheet production according to claim 1, characterized in that: The mold frame can be replaced with a set of mold bases and four pairs of mold frames arranged around the mold bases. A set of lead screws and a set of guide rods are installed between each pair of mold frames. The lead screws are interchangeably installed on the corresponding mold frames. Two sets of parallel transverse connecting rods and two sets of parallel longitudinal connecting rods are provided on the side of the mold base away from the turntable. The two sets of longitudinal connecting rods pass perpendicularly through the two sets of transverse connecting rods to form a rectangular distribution.

6. The equidistant slitting device for plastic sheet production according to claim 5, characterized in that: The two ends of the transverse connecting rod and the longitudinal connecting rod are respectively screwed to the outside of the lead screw by the first hanger and guided to the outside of the guide rod by the second hanger. A set of limiting frames are detachably connected to the transverse connecting rod and the longitudinal connecting rod by screws. The four sets of limiting frames are used to limit the perimeter of the rectangular plastic plate.

7. The equidistant slitting device for plastic sheet production according to claim 6, characterized in that: Each set of limiting frames includes vertical plates and horizontal plates distributed at right angles. The vertical plates are provided with cutting grooves for the saw blade unit to pass through. The horizontal plates are provided with abutment posts corresponding to two adjacent sets of cutting grooves. The abutment posts are used to press the plastic plate on the base plate so that its top surface is lower than the bottom of the cutting groove.

8. The equidistant slitting device for plastic sheet production according to claim 1, characterized in that: The operation method of the device includes: after the mold frame limits the plastic sheet, it moves from the transition zone to the indexing zone. When passing the cutting zone, a row of saw blades located on the base of the isosceles triangle is driven to protrude from the base, completing the first equidistant cutting; then the mold frame rotates 90 degrees in the indexing zone and moves from the indexing zone to the transition zone. When passing the cutting zone, two rows of saw blades located on the waist of the isosceles triangle are driven to protrude from the base, completing the second equidistant cutting, thereby realizing the horizontal and vertical equidistant cutting of the plastic sheet.

9. The equidistant slitting device for plastic sheet production according to claim 3, characterized in that: The isosceles triangular arrangement of cutting holes allows for adjustment of the saw blade group position to accommodate different cutting intervals. During the first equidistant cut, a row of saw blades located on the base of the isosceles triangle is driven to protrude from the base to complete the transverse cut. After the mold frame rotates, two rows of saw blades located on the waist of the isosceles triangle are driven to protrude from the base to complete the longitudinal cut, thereby enabling batch processing of different sizes.

10. The equidistant slitting device for plastic sheet production according to claim 1, characterized in that: The drive assembly includes a combination of a lead screw and a nut slider, used to precisely control the linear motion of the mold frame; the saw blade assembly in the cutting area protrudes from the base table surface when working and retracts when not working, to ensure operational safety and equipment lifespan.

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