A plastic sheet automated production line and injection mold structure thereof

Abstract

The present application relates to an automated production line for plastic sheets and its injection mold structure, including a frame, an upper mold, a lower mold, a hydraulic positioning assembly and a cooling assembly, wherein the lower mold is fixedly arranged on the frame, and the hydraulic positioning assembly is used to drive the upper mold to be in a mold-closing state; a preliminary molding cavity is formed after the upper mold and the lower mold are molded together, and molding grooves are respectively provided on the left and right sides of the preliminary molding cavity along the production moving direction of the injection molding sheet, and molding blocks are respectively slidably connected in the two molding grooves, and the molding block located on the left side is used to form a splicing groove after moving to the left side of the protruding preliminary molding cavity, and the molding block located on the right side is used to form a splicing protrusion after moving to the right side of the concave preliminary molding cavity; two driving members are provided on the upper mold, and the two driving members are respectively used to drive the two molding blocks to move in the two molding grooves. By adjusting the position of the molding block, three types of splicable sheets can be produced in one injection mold, without the need to replace the injection mold, which facilitates the production of splicable plastic sheets.

Description

Technical Field

[0001] The invention relates to the field of injection molds, and in particular to an automatic production line for plastic plates and an injection mold structure thereof. Background Art

[0002] In the production of plastic sheets, modified plastics are used, and molds are used for one-piece molding, so that plastic can replace wood, bamboo, rattan, aluminum, and ceramics, providing diversified product application scenarios. By combining plastic with aluminum, iron, cloth, glass, new materials, and chips, the product has the advantages of UV protection and anti-aging at high temperatures.

[0003] Physical micro-foaming technology can significantly improve the performance of PP plastics. While reducing the density, the mechanical properties, thermal insulation properties and dimensional stability are improved. The PP raw material and the foaming agent are mixed and melted in the extruder, and then foamed by a specific foaming device at the die head, and finally molded and cooled to form a foamed product.

[0004] Produce plastic sheets that can be spliced, such as Figure 1 As shown, it includes a left plate 10, a middle plate 11 and a right plate 12, wherein the middle plate 11 can be multiple, the middle plate 11 has a splicing groove 13 on the left side and a splicing protrusion 14 on the right side, the left plate 10 has a splicing protrusion 14 only on the right side, and the right plate 12 has a splicing groove 13 only on the left side.

[0005] To produce the above-mentioned spliced ​​panels, after the head is foamed, three different forming molds are needed to finalize the shape. The three forming molds occupy a large area and need to be loaded back and forth onto the plastic panel automated production line, which is inconvenient. Summary of the invention

[0006] In order to facilitate the production of splicable plastic sheets, the present application provides an automated production line for plastic sheets and an injection mold structure thereof.

[0007] The present application provides a plastic sheet injection mold structure that adopts the following technical solution:

[0008] A plastic plate injection mold structure, comprising a frame, an upper mold, a lower mold, a hydraulic positioning assembly and a cooling assembly, wherein the lower mold is fixedly arranged on the frame, the hydraulic positioning assembly is used to drive the upper mold to always abut against the lower mold in a mold-closing state, and the cooling assembly is used to cool the upper mold and the lower mold;

[0009] After the upper mold and the lower mold are molded together, a preliminary molding cavity is formed, and the preliminary molding cavity is completely located in the upper mold. The left and right sides of the preliminary molding cavity are respectively provided with molding grooves along the production moving direction of the injection molding plate. The two molding grooves are respectively slidably connected with molding blocks. The molding block on the left side is moved to protrude from the left side of the preliminary molding cavity and is used to form a splicing groove. The molding block on the right side is moved to be concave on the right side of the preliminary molding cavity and is used to form a splicing protrusion.

[0010] The upper die is provided with two driving members, which are respectively used to drive the two forming blocks to move in the two forming grooves.

[0011] By adopting the above technical scheme, when the left-side molding block is protruding and the right-side molding block is flush with the right side surface of the molding cavity, the right plate can be produced; when the right-side molding block is concave and the left-side molding block is flush with the left side surface of the molding cavity, the left plate can be produced; when the left-side molding block is protruding and the right-side molding block is concave, the middle plate can be produced; by adjusting the position of the molding blocks, three types of spliced ​​plates can be produced in one injection mold without changing the injection mold, thereby facilitating the production of spliced ​​plastic plates.

[0012] Preferably, two liquid inlet control components are further included, a cooling water channel is provided in the forming block, the cooling water channel includes a middle section, a first inlet bending section and an outlet bending section, the length direction of the middle section is parallel to the length direction of the forming block, the middle section is arranged close to the preliminary forming cavity, and the first inlet bending section and the outlet bending section are respectively connected to two ends of the middle section;

[0013] The first inlet bending section and the outlet bending end are respectively arranged close to the inlet and outlet of the preliminary molding cavity, the outlet bending section is connected with a liquid outlet pipe, the two liquid inlet control components correspond to the two molding blocks respectively, and the liquid inlet control components are used to transport the cooling liquid to the first inlet bending section of the corresponding molding block.

[0014] By adopting the above technical solution, since this injection mold mainly plays a shaping role on the foamed plastic sheet, cooling is an indispensable step. The cooling component acts on the lower mold and the upper mold, and does not directly act on the two forming blocks. At the same time, since the forming block is the key part for directly forming the splicing groove and the splicing protrusion, by arranging a cooling water channel in the forming block, the cooling level of each part of the plastic sheet can be made consistent, thereby improving the consistency of the surface of the plastic sheet.

[0015] Preferably, the cooling water channel further comprises a second inlet bending section, the second inlet bending section is located between the first inlet bending section and the outlet bending section, one end of the second inlet bending section is connected to the middle section, and a one-way valve is provided on the middle section;

[0016] The liquid inlet control component is used to connect the second inlet bending section and block the first inlet bending section when the forming block forms a splicing groove or a splicing protrusion; the liquid inlet control component is used to connect the first inlet bending section and block the second inlet bending section when the forming block is flush with the side of the preliminary forming cavity;

[0017] The connection point between the second inlet bending section and the middle section is located at one-third of the length of the middle section and is closer to the first inlet bending section.

[0018] By adopting the above technical solution, when the molding block is in the state of forming the splicing groove or the splicing protrusion, the soft injection molding material after foaming enters from the inlet of the molding cavity and begins to be shaped. Since both the splicing groove and the splicing protrusion require the injection molding material to undergo a certain degree of deformation and extrusion molding, the injection molding material entering the molding cavity can be better deformed by stopping cooling the end of the molding block close to the inlet of the molding cavity; the injection molding material has been shaped after passing through the inlet of the molding cavity for a period of time, so resuming the cooling of the molding block at this time can better cool and shape the shaped injection molding material;

[0019] When the molding block is flush with the side of the preliminary molding cavity, the molding structure of the end of the injection molded sheet is relatively simple without so many bends, so the liquid inlet control component is directly connected to the first inlet bending section, which can cool the entire molding block, make the cooling level of various parts of the plastic sheet consistent, and improve the consistency of the surface of the plastic sheet.

[0020] Preferably, a one-way valve is provided on the middle section, and the one-way valve is located between the first inlet bending section and the second inlet bending section, and is arranged near the connection between the second inlet bending section and the middle section. The one-way valve only allows the coolant in the first inlet bending section to flow to the outlet bending section.

[0021] By adopting the above technical solution, the one-way valve can prevent the coolant entering the second inlet bending section from flowing back to the front end of the middle section and the first inlet bending section. At this time, the coolant in the first inlet bending section and the front end of the middle section can be heated up with the continuous entry of the injection molding material, thereby achieving a thermal insulation effect, which can better deform the injection molding material entering the molding cavity and improve the production quality of the injection molding plate.

[0022] Preferably, the driving member comprises a first oil cylinder, the first oil cylinder is fixedly arranged on the outer wall of the upper mold, and the piston rod of the first oil cylinder is fixedly arranged on the corresponding forming block;

[0023] The liquid inlet control assembly comprises a first rack, a gear, a second rack, a telescopic rod, a moving block and a liquid inlet pipe. An active cavity for the liquid inlet control assembly to move is provided in the upper mold. The moving block is slidably connected to a side of the corresponding forming block away from the forming cavity along the length direction of the forming block. The moving block is always in contact with the forming block to block the first inlet bending section and the second inlet bending section. The liquid inlet pipe is arranged on the moving block, and one end of the liquid inlet pipe is a docking end, which is always arranged toward the forming block and is used to dock the first inlet bending section and the second inlet bending section.

[0024] The first rack is fixedly arranged on the piston rod of the first oil cylinder, the gear is rotatably connected to the movable cavity of the upper mold, the second rack is slidably connected to the movable cavity of the upper mold along a sliding direction parallel to the sliding direction of the moving block, the first rack and the second rack are both meshed and connected to the gear, and the two ends of the telescopic rod are respectively fixedly arranged on the moving block and the second rack.

[0025] By adopting the above technical solution, when the first oil cylinder drives the forming block to move, it can drive the first rack to move, the first rack drives the gear to rotate, the rotation of the gear drives the movement of the second rack, and the second rack drives the moving block to move through the telescopic rod, thereby changing the position of the docking end, so that the docking end switches back and forth in docking with the first inlet bending section and the second inlet bending section. At the same time, the moving block itself can block the other first inlet bending section or the second inlet bending section that is not connected to the docking end by abutting against the forming block.

[0026] Preferably, the telescopic rod includes a first rod, a second rod and a spring arranged between the first rod and the second rod which are slidably connected to each other, the spring is always in a compressed state, and the ends of the first rod and the second rod which are away from each other are fixedly arranged on the moving block and the second rack respectively.

[0027] The present application provides an automated production line for plastic sheets using the following technical solutions:

[0028] A plastic plate automated production line and an injection mold structure thereof, comprising a plastic plate injection mold structure.

[0029] The technical effects of the present invention are mainly reflected in the following aspects:

[0030] 1. The present invention can produce three types of spliced ​​plates in one injection mold by adjusting the position of the forming block, without the need to replace the injection mold, thereby facilitating the production of spliced ​​plastic plates;

[0031] 2. The present invention can make the cooling level of each part of the plastic sheet tend to be consistent by arranging cooling water channels in the forming block, thereby improving the consistency of the surface of the plastic sheet;

[0032] 3. The present invention stops cooling the end of the molding block close to the molding cavity inlet when the molding block is in the state of the molding splicing groove or the splicing protrusion, so that the injection molding material entering the molding cavity can be better deformed; the injection molding material has been shaped after passing through the molding cavity inlet for a period of time, so resuming the cooling of the molding block at this time can better cool and shape the shaped injection molding material. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of the related technology.

[0034] Figure 2 It is a schematic diagram of the overall structure of Example 1 of the present application.

[0035] Figure 3 is along Figure 2 Section view along line AA.

[0036] Figure 4 It is a schematic diagram of the overall structure of the second embodiment of the present application.

[0037] Description of reference numerals: 10, left plate; 11, middle plate; 12, right plate; 13, joint groove; 14, joint protrusion; 2, frame; 21, upper die; 211, movable cavity; 212, first oil cylinder; 22, lower die; 23, preliminary forming cavity; 24, forming groove; 3, forming block; 31, middle section; 32, first inlet bending section; 33, outlet bending section; 34, second inlet bending section; 35, one-way valve; 41, Hydraulic positioning assembly; 42, connector; 5, liquid inlet control assembly; 51, first rack; 52, gear; 53, second rack; 54, moving block; 56, telescopic rod; 561, first rod; 562, second rod; 563, spring; 57, liquid outlet pipe; 58, liquid inlet pipe; 59, docking end; 61, screw extruder; 62, foaming extruder head; 63, cooling water tank; 64, traction device; 65, cutting device. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1-Figure 4 The present application is further described in detail to make the technical solution of the present application easier to understand and grasp.

[0039] Embodiment 1: The embodiment of the present application discloses a plastic sheet injection mold structure.

[0040] Reference Figure 2 and Figure 3A plastic plate injection mold structure of the present embodiment includes a frame 2, an upper mold 21, a lower mold 22, a hydraulic positioning assembly 41 and a cooling assembly. The lower mold 22 is fixedly arranged on the frame 2. The hydraulic positioning assembly 41 includes a plurality of oil cylinders for driving the upper mold 21 to always abut against the lower mold 22 in a mold closing state. The cooling assembly is used to cool the upper mold 21 and the lower mold 22.

[0041] Reference Figure 1-Figure 3 After the upper mold 21 and the lower mold 22 are molded together, a preliminary molding cavity 23 is formed. The preliminary molding cavity 23 is completely located in the upper mold 21. The left and right sides of the preliminary molding cavity 23 are respectively provided with molding grooves 24 along the production moving direction of the injection molding plate. The two molding grooves 24 are respectively slidably connected with molding blocks 3. The molding block 3 on the left side is moved to protrude from the left side of the preliminary molding cavity 23 and is used to form the splicing groove 13. The molding block 3 on the right side is moved to be recessed from the right side of the preliminary molding cavity 23 and is used to form the splicing protrusion 14.

[0042] Reference Figure 2 and Figure 3 The upper die 21 is provided with two driving members, which are used to drive the two forming blocks 3 to move in the two forming grooves 24 respectively.

[0043] Reference Figure 2 and Figure 3 When the left molding block 3 is protruding and the right molding block 3 is flush with the right side surface of the molding cavity, the right plate 12 can be produced; when the right molding block 3 is recessed and the left molding block 3 is flush with the left side surface of the molding cavity, the left plate 10 can be produced; when the left molding block 3 is protruding and the right molding block 3 is recessed, the middle plate 11 can be produced; by adjusting the position of the molding block 3, three types of spliced ​​plates can be produced in one injection mold, without the need to replace the injection mold, thereby facilitating the production of spliced ​​plastic plates.

[0044] Reference Figure 2 and Figure 3 The cooling assembly includes a pump body and multiple water pipes. There are multiple cooling channels in the upper mold 21 and the lower mold 22. Multiple connectors 42 for connecting the cooling channels and water pipes are also provided on the surface of the upper mold 21 and the lower mold 22. The water pump draws water from the source to cool the upper mold 21 and the lower mold 22.

[0045] Reference Figure 2 and Figure 3 , and also includes two liquid inlet control components 5. A cooling water channel is opened in the forming block 3, and the cooling water channel includes a middle section 31, a first inlet bending section 32 and an outlet bending section 33. The length direction of the middle section 31 is parallel to the length direction of the forming block 3. The middle section 31 is arranged close to the preliminary forming cavity 23, and the first inlet bending section 32 and the outlet bending section 33 are respectively connected to the two ends of the middle section 31.

[0046] Reference Figure 2 and Figure 3 The first inlet bending section 32 and the outlet bending end are respectively arranged close to the inlet and outlet of the preliminary molding cavity 23 . The outlet bending section 33 is connected to a liquid outlet pipe 57 . The liquid inlet control component 5 is used to transport the coolant to the first inlet bending section 32 .

[0047] Reference Figure 1-Figure 3 Since this injection mold mainly plays a shaping role on the foamed plastic sheet, cooling is an indispensable step. The cooling component acts on the lower mold 22 and the upper mold 21, and does not directly act on the two forming blocks 3. At the same time, since the forming block 3 is the key part that directly forms the splicing groove 13 and the splicing protrusion 14, by arranging a cooling water channel in the forming block 3, the cooling level of each part of the plastic sheet can be made consistent, thereby improving the consistency of the surface of the plastic sheet.

[0048] Reference Figure 2 and Figure 3 The cooling water channel also includes a second inlet bending section 34, which is located between the first inlet bending section 32 and the outlet bending section 33. One end of the second inlet bending section 34 is connected to the middle section 31, and a one-way valve 35 is provided on the middle section 31.

[0049] Reference Figure 1-Figure 3 The liquid inlet control component 5 is used to connect the second inlet bending section 34 and block the first inlet bending section 32 when the forming block 3 forms the splicing groove 13 or the splicing protrusion 14; the liquid inlet control component 5 is used to connect the first inlet bending section 32 and block the second inlet bending section 34 when the forming block 3 is flush with the side of the preliminary forming cavity 23.

[0050] Reference Figure 2 and Figure 3 The connection point between the second inlet bending section 34 and the middle section 31 is located at one-third of the length of the middle section 31 and is closer to the first inlet bending section 32 .

[0051] Reference Figure 1-Figure 3 When the molding block 3 is in the state of molding the splicing groove 13 or the splicing protrusion 14, the soft injection molding material after foaming enters from the inlet of the molding cavity and begins to be shaped. Since both the splicing groove 13 and the splicing protrusion 14 require the injection molding material to undergo a certain degree of deformation and extrusion molding, by stopping the cooling of the end of the molding block 3 close to the inlet of the molding cavity, the injection molding material entering the molding cavity can be better deformed; after the injection molding material has passed through the inlet of the molding cavity for a period of time, it has been shaped, so resuming the cooling of the molding block 3 at this time can better cool and shape the shaped injection molding material.

[0052] Reference Figure 2 and Figure 3When the molding block 3 is flush with the side of the preliminary molding cavity 23, the molding structure of the end of the injection molded sheet is relatively simple without so many bends, so the liquid inlet control component 5 is directly connected to the first inlet bending section 32, which can cool the entire molding block 3, so that the cooling level of each part of the plastic sheet tends to be consistent, thereby improving the consistency of the surface of the plastic sheet.

[0053] Reference Figure 2 and Figure 3 A one-way valve 35 is provided on the middle section 31. The one-way valve 35 is located between the first inlet bending section 32 and the second inlet bending section 34, and is arranged close to the connection between the second inlet bending section 34 and the middle section 31. The one-way valve 35 only allows the coolant in the first inlet bending section 32 to flow to the outlet bending section 33.

[0054] Reference Figure 2 and Figure 3 The one-way valve 35 can prevent the coolant entering the second inlet bending section 34 from flowing back to the front end of the middle section 31 and the first inlet bending section 32. At this time, the coolant at the first inlet bending section 32 and the front end of the middle section 31 can be heated up with the continuous entry of the injection molding material, which has a thermal insulation effect, can better deform the injection molding material entering the molding cavity, and improve the production quality of the injection molding plate.

[0055] Reference Figure 2 and Figure 3 The driving member includes a first oil cylinder 212 , which is fixedly disposed on the outer wall of the upper mold 21 , and a piston rod of the first oil cylinder 212 is fixedly disposed on the corresponding forming block 3 .

[0056] Reference Figure 2 and Figure 3 The liquid inlet control assembly 5 includes a first rack 51, a gear 52, a second rack 53, a telescopic rod 56, a moving block 54 and a liquid inlet pipe 58. An active cavity 211 for the liquid inlet control assembly 5 to move is provided in the upper mold 21. The moving block 54 is slidably connected to the side of the corresponding molding block 3 away from the molding cavity along the length direction of the molding block 3. The moving block 54 is always in contact with the molding block 3 to block the first inlet bending section 32 and the second inlet bending section 34; the liquid inlet pipe 58 is arranged on the moving block 54, and one end of the liquid inlet pipe 58 is a docking end 59, which is always arranged toward the molding block 3, and the docking end 59 is used to dock the first inlet bending section 32 and the second inlet bending section 34.

[0057] Reference Figure 2 and Figure 3The first rack 51 is fixedly arranged on the piston rod of the first oil cylinder 212, the gear 52 is rotatably connected in the active cavity 211 of the upper mold 21, the second rack 53 is slidably connected in the active cavity 211 of the upper mold 21 along a sliding direction parallel to the sliding direction of the moving block 54, the first rack 51 and the second rack 53 are both meshed and connected to the gear 52, and the two ends of the telescopic rod 56 are respectively fixedly arranged on the moving block 54 and the second rack 53.

[0058] Reference Figure 2 and Figure 3 When the first oil cylinder 212 drives the forming block 3 to move, it can drive the first rack 51 to move, the first rack 51 drives the gear 52 to rotate, the rotation of the gear 52 drives the movement of the second rack 53, and the second rack 53 drives the moving block 54 to move through the telescopic rod 56, thereby changing the position of the docking end 59, so that the docking end 59 switches back and forth in the docking with the first inlet bending section 32 and the second inlet bending section 34. At the same time, the moving block 54 itself can block the other first inlet bending section 32 or the second inlet bending section 34 that is not connected to the docking end 59 by abutting against the forming block 3.

[0059] Reference Figure 2 and Figure 3 The telescopic rod 56 includes a first rod 561, a second rod 562, and a spring 563 arranged between the first rod 561 and the second rod 562, which are slidably connected to each other. The spring 563 is always in a compressed state. The ends of the first rod 561 and the second rod 562 that are away from each other are fixedly arranged on the moving block 54 and the second rack 53 respectively.

[0060] Embodiment 2: The embodiment of the present application also discloses an automated production line for plastic sheets.

[0061] Reference Figure 4 A plastic sheet automated production line includes an extrusion device, a plastic sheet injection mold, a cooling water tank 63, a traction device 64 and a cutting device 65 in sequence. The extrusion device includes a screw extruder 61 and a foaming extrusion head 62. The foaming extrusion head 62 extrude the foamed injection molding material, and the operator passes it through the injection mold and the cooling water tank 63 in sequence. The traction device 64 is composed of two upper and lower conveyor belts. The upper and lower conveyor belts clamp the injection molding material and transmit it. Finally, the plastic sheet that has been shaped by the injection mold is transmitted to the cutting device 65 for cutting.

[0062] Of course, the above are only typical examples of the present application. In addition, the present application may have many other specific implementation methods. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present application.

Claims

1. A plastic sheet injection mold structure, characterized in that: It includes a frame, an upper die, a lower die, a hydraulic positioning assembly and a cooling assembly. The lower die is fixedly arranged on the frame. The hydraulic positioning assembly is used to drive the upper die to always abut against the lower die in a mold-closing state. The cooling assembly is used to cool the upper die and the lower die. After the upper mold and the lower mold are combined, a preliminary molding cavity is formed. The preliminary molding cavity is completely located in the upper mold. The left and right sides of the preliminary molding cavity are respectively provided with molding grooves along the production moving direction of the injection molding plate. The two molding grooves are respectively slidably connected with molding blocks. The molding block located on the left side is moved to protrude from the left side of the preliminary molding cavity and is used to form the splicing groove. The molding block located on the right side is moved to be concave on the right side of the preliminary molding cavity and is used to form the splicing protrusion. The upper die is provided with two driving members, which are used to drive the two forming blocks to move in the two forming grooves respectively; It also includes two liquid inlet control components. A cooling water channel is provided in the forming block. The cooling water channel includes a middle section, a first inlet bending section and an outlet bending section. The middle section is arranged close to the preliminary forming cavity. The first inlet bending section and the outlet bending section are connected to the two ends of the middle section respectively. The cooling water channel also includes a second inlet bending section. The second inlet bending section is located between the first inlet bending section and the outlet bending section. One end of the second inlet bending section is connected to the middle section. A one-way valve is provided on the middle section. The two liquid inlet control components correspond to two forming blocks respectively. The liquid inlet control components are used to transport the coolant to the first inlet bending section of the corresponding forming block; the liquid inlet control components are used to connect the second inlet bending section and block the first inlet bending section when the forming block is in the state of forming splicing grooves or splicing protrusions; the liquid inlet control components are used to connect the first inlet bending section and block the second inlet bending section when the forming block is flush with the side of the preliminary forming cavity.

2. A plastic sheet injection mold structure according to claim 1, characterized in that: The length direction of the middle section is parallel to the length direction of the forming block; The first inlet bending section and the outlet bending end are respectively arranged close to the inlet and outlet of the preliminary forming cavity, and the outlet bending section is connected with a liquid outlet pipe.

3. A plastic sheet injection mold structure according to claim 2, characterized in that: The connection point between the second inlet bending section and the middle section is located at one-third of the length of the middle section and is closer to the first inlet bending section.

4. A plastic sheet injection mold structure according to claim 3, characterized in that: A one-way valve is provided on the middle section, which is located between the first inlet bending section and the second inlet bending section and is arranged close to the connection between the second inlet bending section and the middle section. The one-way valve only allows the coolant in the first inlet bending section to flow to the outlet bending section.

5. A plastic sheet injection mold structure according to claim 3, characterized in that: The driving member comprises a first oil cylinder, which is fixedly arranged on the outer wall of the upper mold, and a piston rod of the first oil cylinder is fixedly arranged on the corresponding forming block; The liquid inlet control assembly includes a first rack, a gear, a second rack, a telescopic rod, a moving block and a liquid inlet pipe. An active cavity for the liquid inlet control assembly to move is provided in the upper mold. The moving block is slidably connected to a side of the corresponding forming block away from the forming cavity along the length direction of the forming block. The moving block is always in contact with the forming block to block the first inlet bending section and the second inlet bending section. The liquid inlet pipe is arranged on the moving block, and one end of the liquid inlet pipe is a docking end, which is always arranged toward the forming block and is used to dock the first inlet bending section and the second inlet bending section. The first rack is fixedly arranged on the piston rod of the first oil cylinder, the gear is rotatably connected to the movable cavity of the upper mold, the second rack is slidably connected to the movable cavity of the upper mold along a sliding direction parallel to the sliding direction of the moving block, the first rack and the second rack are both meshed and connected to the gear, and the two ends of the telescopic rod are respectively fixedly arranged on the moving block and the second rack.

6. A plastic sheet injection mold structure according to claim 5, characterized in that: The telescopic rod comprises a first rod, a second rod and a spring arranged between the first rod and the second rod in sliding connection with each other. The spring is always in a compressed state. The ends of the first rod and the second rod that are away from each other are fixedly arranged on the moving block and the second rack respectively.

7. An automated production line for plastic sheets, characterized in that: A plastic sheet injection mold structure comprising any one of claims 1-6.

Images