Plastic flange injection molding mold

Abstract

The invention discloses a plastic flange injection molding mold, and relates to the technical field of plastic flange molding, the plastic flange injection molding mold comprises a mold structure and a cooling mechanism, the mold structure comprises a top loading plate, a hydraulic cylinder, a pouring plate, an upper mold, a bottom loading plate and a lower mold, the top loading plate is arranged right above the bottom loading plate in parallel, and the upper mold is arranged right above the lower mold in parallel; the pouring plate is arranged right above the upper die in parallel, and the hydraulic cylinder drives the pouring plate, the upper die and the lower die to be vertically overlapped or vertically separated; the pair of cooling mechanisms are symmetrically distributed left and right, each cooling mechanism comprises a piston cylinder and a cooling box, when the mold structures are vertically overlapped, the piston cylinders are filled with air, and when the mold structures are vertically separated, the cooling boxes are rapidly filled with air in the piston cylinders; and the cooling holes in the bottom of the cooling box are uniformly sprayed to the demolded plastic flange, so that the plastic flange is quickly cooled and shaped. The device has the advantages of being reasonable in scheme, ingenious in structure and convenient to use.

Description

Technical Field

[0001] The invention relates to the technical field of plastic flange molding, and in particular to a plastic flange injection molding die. Background Art

[0002] Plastic flange is a plastic connector used to connect pipes, containers or other equipment, and is widely used in chemical, pharmaceutical, food processing and other industries. Compared with metal flanges, plastic flanges have the advantages of light weight, corrosion resistance and low cost, but their mechanical strength and operating temperature range are usually not as good as metal flanges.

[0003] Plastic flanges can be manufactured in three ways:

[0004] Injection molding: This is one of the most commonly used manufacturing methods and is suitable for mass production of complex-shaped products. Molten plastic is injected into the mold cavity and formed into the desired flange shape after cooling.

[0005] Extrusion molding: Mainly used to make flanges of simple shapes, such as round or square flanges. The molten plastic is extruded through a die and shaped.

[0006] Rotational molding: Suitable for manufacturing large or special-shaped flanges, the plastic is evenly distributed and solidified by rotating the mold.

[0007] At present, when manufacturing thick-walled plastic flanges through injection molding, the existing molding mold itself has low cooling efficiency, which requires a long time in the cooling and shaping stage, reducing production efficiency. In addition, the surface of the existing molding mold is prone to forming flash on the surface of the plastic flange, which is easy to scratch the palm of the installer in actual application. Summary of the invention

[0008] The object of the present invention is to provide a plastic flange injection molding die to solve the above-mentioned defects caused by the prior art.

[0009] A plastic flange injection molding mold, comprising a mold structure and a cooling mechanism, wherein:

[0010] The mold structure includes a top plate, a hydraulic cylinder, a casting plate, an upper mold, a bottom plate and a lower mold. The top plate is arranged parallel to and directly above the bottom plate. The hydraulic cylinder is vertically installed downward at the center of the top plate. The upper mold is arranged parallel to and directly above the lower mold, and the lower mold is installed parallel to the middle of the bottom plate. The casting plate is arranged parallel to and directly above the upper mold. The casting plate, the upper mold and the lower mold are driven by the hydraulic cylinder to be vertically superimposed or vertically separated.

[0011] There are a pair of cooling mechanisms which are symmetrically distributed left and right. The cooling mechanism includes a piston cylinder and a cooling box. When the mold structure is vertically stacked, air is filled into the piston cylinder. When the mold structure is vertically separated, the air in the piston cylinder is quickly filled into the cooling box and evenly sprayed through the cooling holes at the bottom of the cooling box onto the demolded plastic flange, thereby quickly cooling and shaping the plastic flange.

[0012] Preferably, the end of the piston rod of the hydraulic cylinder is connected with a "Ji"-shaped connecting frame, and the connecting frame is centered and connected to the upper side of the pouring plate. There is a gate at the center of the pouring plate. There is a "Kuang"-shaped main runner between the upper mold and the pouring plate, and the main runner is interconnected with the gate. There are a pair of forming cavities symmetrically distributed left and right on the upper side of the lower mold, and a core mold is coaxially arranged inside the forming cavity. There are two groups of "X"-shaped sub-runners between the upper mold and the core mold, and the sub-runners are interconnected with the main runner.

[0013] Preferably, there are a pair of piston cylinders which are symmetrically connected to the lower side of the pouring plate front and back. The upper part of the piston cylinder is evenly distributed with air suction ports. The bottom end of the piston cylinder is symmetrically distributed with exhaust holes, and an exhaust pipe is connected at the exhaust holes, and the other end of the exhaust pipe is communicated with the side surface of the cooling box. A piston block is slidably connected inside the piston cylinder. The piston block is evenly distributed with ventilation holes, and a check valve is connected at the bottom end of the ventilation holes. A piston rod is vertically connected to the lower end of the piston block. There are two pairs of hinge bars hinged front and back below the lower mold, and the cooling box is jointly hinged to the lower ends of all the hinge bars. There are several cooling holes centered on the bottom surface of the cooling box.

[0014] Preferably, a pair of guide columns are symmetrically connected to the left and right on the pouring plate, and the guide columns are slidably connected with the top mounting plate through guide sleeves.

[0015] Preferably, there are "X"-shaped sliding grooves symmetrically distributed left and right on the lower side of the lower mold, and an "X"-shaped sliding frame is slidably connected in the sliding grooves. The inner side of the upper side of the sliding frame is evenly distributed with unloading pins, and all the unloading pins slide through the bottom of the forming cavity. The outer side of the upper side of the sliding frame is evenly distributed with guide pins, and all the guide pins slide through the periphery of the forming cavity. A number of compression springs I are evenly connected between the lower side of the sliding frame and the lower mold.

[0016] Preferably, an annular cooling pipe is embedded around the forming cavity of the lower mold.

[0017] Preferably, a pair of compression springs II are symmetrically connected front and back between the cooling box and the upper mold.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] 1. The present invention can realize automatic demoulding of injection molded products. When the upper mold moves upward, the unloading pin on the sliding frame can be pushed upward by compressing the spring 1, and the plastic flange can be pushed upward from the molding cavity to realize automatic demoulding. The upper mold that moves downward can squeeze the guide pin, so that the guide pin is completely retracted into the lower mold, and the unloading pin is completely retracted to the bottom of the molding cavity, so as to avoid affecting the shape of the injection-molded plastic flange and not easily forming flash that hurts people.

[0020] 2. The present invention can accelerate the cooling and shaping of injection molded products. When the mold structure is vertically overlapped, the cooling box is stored under the upper mold. At the same time, when the piston block moves upward in the piston cylinder, the check valve is in an open state, and outside air can enter the piston cylinder through the air intake and the vent. Then, when the mold structure is vertically separated, the cooling box extends to the bottom of the upper mold. At the same time, when the piston block moves downward in the piston cylinder, the check valve is in a blocked state, and the air in the piston cylinder can enter the cooling box through the exhaust hole and the exhaust pipe, and finally, it is evenly sprayed to the plastic flange after demolding through the cooling hole at the bottom of the cooling box, thereby quickly cooling and shaping the plastic flange. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention.

[0022] Figure 2 It is a schematic structural diagram of the overall front view of the present invention.

[0023] Figure 3 It is a schematic diagram of the overall three-dimensional structure of the mold structure.

[0024] Figure 4 This is a schematic diagram of the structure of the casting plate from the first perspective.

[0025] Figure 5 This is a schematic diagram of the structure of the casting plate from the second perspective.

[0026] Figure 6 This is a structural diagram of the upper mold from the first perspective.

[0027] Figure 7 This is a structural diagram of the upper mold from the second perspective.

[0028] Figure 8 This is a structural diagram of the lower mold from the first perspective.

[0029] Fig. 9 This is a structural diagram of the lower mold from the second viewing angle.

[0030] Fig.10 It is a schematic diagram of the local three-dimensional structure of the mold structure.

[0031] Fig.11This is a schematic diagram of the structure of the cooling mechanism from the first perspective.

[0032] Fig.12 This is a schematic structural diagram of the cooling mechanism from the second perspective.

[0033] Fig.13 It is a schematic diagram of the local three-dimensional structure of the cooling mechanism.

[0034] in:

[0035] 10-mould structure; 101-top mounting plate; 102-hydraulic cylinder; 103-connecting frame; 104-pouring plate; 104a-gate; 105-guide column; 106-guide sleeve; 107-upper mould; 107a-main channel; 108-bottom mounting plate; 109-support column; 110-lower mould; 110a-molding cavity; 110b-sliding groove; 111-core mould; 111a-diverter channel; 112-sliding frame; 113-unloading pin; 114-guide pin; 115-compression spring 1; 116-cooling pipe.

[0036] 20-cooling mechanism; 201-piston cylinder; 201a-intake port; 201b-exhaust hole; 202-piston block; 202a-vent hole; 203-exhaust pipe; 204-check valve; 205-piston rod; 206-hinge strip; 207-cooling box; 207a-cooling hole; 208-compression spring two.

[0037] 30-Plastic flange. DETAILED DESCRIPTION

[0038] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0039] like Figures 1 to 13 As shown, a plastic flange injection molding mold includes a mold structure 10 and a cooling mechanism 20, wherein:

[0040] The mold structure 10 includes a top plate 101, a hydraulic cylinder 102, a casting plate 104, an upper mold 107, a bottom plate 108 and a lower mold 110. The top plate 101 is arranged parallel to and directly above the bottom plate 108. The hydraulic cylinder 102 is vertically installed downward at the center of the top plate 101. The upper mold 107 is arranged parallel to and directly above the lower mold 110, and the lower mold 110 is installed parallel to the middle of the bottom plate 108. The casting plate 104 is arranged parallel to and directly above the upper mold 107. The hydraulic cylinder 102 drives the casting plate 104, the upper mold 107 and the lower mold 110 to be vertically superimposed or vertically separated.

[0041] There are a pair of cooling mechanisms 20 which are symmetrically distributed left and right. The cooling mechanism 20 includes a piston cylinder 201 and a cooling box 207. When the mold structure 10 is vertically stacked, air is filled into the piston cylinder 201. When the mold structure 10 is vertically separated, the air in the piston cylinder 201 is quickly filled into the cooling box 207 and evenly sprayed onto the demolded plastic flange 30 through the cooling holes 207a at the bottom of the cooling box 207, thereby quickly cooling and shaping the plastic flange 30.

[0042] In this embodiment, the end of the piston rod of the hydraulic cylinder 102 is connected with a "ji"-shaped connecting frame 103, and the connecting frame 103 is centered and connected to the upper side of the pouring plate 104. A gate 104a is provided at the center of the pouring plate 104. A "kui"-shaped main runner 107a is provided between the upper mold 107 and the pouring plate 104, and the main runner 107a is communicated with the gate 104a. A pair of molding cavities 110a are symmetrically distributed left and right on the upper side of the lower mold 110, and a core mold 111 is coaxially provided inside the molding cavity 110a. Two groups of "X"-shaped sub-runners 111a are provided between the upper mold 107 and the core mold 111, and the sub-runners 111a are communicated with the main runner 107. After the pouring plate 104, the upper mold 107 and the lower mold 110 are neatly stacked together, the molten injection molding raw material is filled into the molding cavity 110a in sequence through the gate 104, the main runner 107a and the sub-runners 111a. After the molding cavity 110a is filled, it is cooled for a set time, and the plastic flange 30 is formed by cooling in the molding cavity 110a.

[0043] In this embodiment, the piston cylinder 201 is provided with a pair of and symmetrically connected to the lower side of the casting plate 104 front and back, the upper part of the piston cylinder 201 is evenly distributed with air intake ports 201a, the bottom end of the piston cylinder 201 is symmetrically distributed with exhaust holes 201b, and an exhaust pipe 203 is connected to the exhaust hole 201b, and the other end of the exhaust pipe 203 is connected to the side of the cooling box 207, the interior of the piston cylinder 201 is slidably connected with a piston block 202, the piston block 202 is evenly distributed with air holes 202a, and a check valve 204 is connected to the bottom end of the air hole 202a, the lower end of the piston block 202 is vertically connected to a piston rod 205, two pairs of hinged bars 206 are hinged front and back below the lower mold 110, and the cooling box 207 is hinged to the lower ends of all the hinged bars 206, and a plurality of cooling holes 207a are centrally distributed on the bottom surface of the cooling box 207. When the mold structure 10 is vertically overlapped, the cooling box 207 is received under the upper mold 107. Meanwhile, when the piston block 202 moves upward in the piston cylinder 201, the check valve 204 is in an open state, and outside air can enter the piston cylinder 201 through the air inlet 201a and the air vent 202a. Then, when the mold structure 10 is vertically separated, the cooling box 207 extends to the bottom of the upper mold 107. Meanwhile, when the piston block 202 moves downward in the piston cylinder 201, the check valve 204 is in a blocked state, and the air in the piston cylinder 201 can enter the cooling box 207 through the exhaust hole 201b and the exhaust pipe 203, and finally, is evenly sprayed toward the demolded plastic flange 30 through the cooling hole 207a at the bottom of the cooling box 207, thereby quickly cooling and shaping the plastic flange 30. In addition, the connection between the piston cylinder 201 and the piston rod 205 can guide the movement process between the casting plate 104 and the upper mold 107.

[0044] In this embodiment, a pair of guide posts 105 are symmetrically connected to the casting plate 104, and the guide posts 105 are slidably connected to the top plate 101 through guide sleeves 106. By adding a guide structure, the casting plate 104, the upper mold 107 and the lower mold 110 can be neatly stacked together, reducing the flash on the plastic flange 30.

[0045] In this embodiment, the lower side of the lower mold 110 is symmetrically distributed with an X-shaped sliding groove 110b, and an X-shaped sliding frame 112 is slidably connected in the sliding groove 110b, and the upper side of the sliding frame 112 is evenly distributed with discharge pins 113, and the discharge pins 113 are slidably installed at the bottom of the molding cavity 110a, and the upper side of the sliding frame 112 is evenly distributed with guide pins 110a, and the guide pins 110a are slidably installed around the molding cavity 110a, and a plurality of compression springs 115 are evenly connected between the lower side of the sliding frame 112 and the lower mold 110. The guide pins 114 can be squeezed by the descending upper mold 107, so that the guide pins 114 are completely retracted into the lower mold 110, and the discharge pins 113 are completely retracted to the bottom of the molding cavity 110a. When the upper mold 107 moves upward, the unloading pin 113 on the sliding frame 112 can be pushed upward by compressing the spring 115, and the plastic flange 30 can be pushed upward from the molding cavity 110a to achieve automatic demoulding.

[0046] In this embodiment, the lower mold 110 is inlaid with an annular cooling pipe 116 around the molding cavity 110a. When cooling water flows through the cooling pipe 116, the temperature of the molding cavity 110a in the lower mold 110 can be reduced quickly.

[0047] In this embodiment, a pair of compression springs 208 are symmetrically connected between the cooling box 207 and the upper mold 107. The cooling box 207 can be coaxially maintained just below the plastic flange 30 after demoulding by the compression springs 208 at their original length.

[0048] Working principle of this plastic flange injection molding mold:

[0049] After the piston rod of the hydraulic cylinder 102 is extended and drives the casting plate 104, the upper mold 107 and the lower mold 110 to be neatly stacked together, the molten injection molding material is sequentially filled into the molding cavity 110a through the gate 104, the main channel 107a and the branch channel 111a. After the molding cavity 110a is filled, it is cooled for a set time and cooled in the molding cavity 110a to form a plastic flange 30.

[0050] When the mold structure 10 is vertically overlapped, the cooling box 207 is received under the upper mold 107. Meanwhile, when the piston block 202 moves upward in the piston cylinder 201, the check valve 204 is in an open state, and outside air can enter the piston cylinder 201 through the air inlet 201a and the air vent 202a. Then, when the mold structure 10 is vertically separated, the cooling box 207 extends to the bottom of the upper mold 107. Meanwhile, when the piston block 202 moves downward in the piston cylinder 201, the check valve 204 is in a blocked state, and the air in the piston cylinder 201 can enter the cooling box 207 through the exhaust hole 201b and the exhaust pipe 203, and finally, is evenly sprayed toward the demolded plastic flange 30 through the cooling hole 207a at the bottom of the cooling box 207, thereby quickly cooling and shaping the plastic flange 30.

[0051] Therefore, the embodiments disclosed above are only illustrative in all aspects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims

1. A plastic flange injection molding mold, characterized in that: It includes a mold structure (10) and a cooling mechanism (20). Among them, the mold structure (10) includes a top mounting plate (101), a hydraulic cylinder (102), a pouring plate (104), an upper mold (107), a bottom mounting plate (108) and a lower mold (110). The top mounting plate (101) is arranged parallel and directly above the bottom mounting plate (108). The hydraulic cylinder (102) is vertically downward and installed at the center of the top mounting plate (101). The upper mold (107) is arranged parallel and directly above the lower mold (110), and the lower mold (110) is parallelly installed in the middle of the bottom mounting plate (108). The pouring plate (104) is arranged parallel and directly above the upper mold (107). The hydraulic cylinder (102) drives the pouring plate (104), the upper mold (107) and the lower mold (110) to perform vertical stacking or vertical separation; there are a pair of the cooling mechanisms (20) which are symmetrically distributed left and right. The cooling mechanism (20) includes a piston cylinder (201) and a cooling box (207). When the mold structure (10) performs vertical stacking, air is filled into the piston cylinder (201). When the mold structure (10) performs vertical separation, the air in the piston cylinder (201) is quickly filled into the cooling box (207), and is evenly sprayed from the cooling holes (207a) at the bottom of the cooling box (207) onto the demolded plastic flange (30), thereby quickly cooling and shaping the plastic flange (30).

2. A plastic flange injection molding mold according to claim 1, characterized in that: The end of the piston rod of the hydraulic cylinder (102) is connected with a "C"-shaped connecting frame (103), and the connecting frame (103) is centered and connected to the upper side of the pouring plate (104). A gate (104a) is provided at the center of the pouring plate (104). A "U"-shaped main runner (107a) is provided between the upper mold (107) and the pouring plate (104), and the main runner (107a) is communicated with the gate (104a). A pair of molding cavities (110a) are symmetrically distributed left and right on the upper side of the lower mold (110), and a core mold (111) is coaxially provided inside the molding cavity (110a). Two "X"-shaped sub-runners (111a) are provided between the upper mold (107) and the core mold (111), and the sub-runners (111a) are communicated with the main runner (107).

3. A plastic flange injection molding mold according to claim 1, characterized in that: The piston cylinder (201) is provided with a pair of symmetrical front-to-back connections to the lower side of the casting plate (104); the upper part of the piston cylinder (201) is evenly provided with air inlets (201a); the bottom end of the piston cylinder (201) is symmetrically provided with exhaust holes (201b); an exhaust pipe (203) is connected to the exhaust hole (201b); the other end of the exhaust pipe (203) is connected to the side of the cooling box (207); the interior of the piston cylinder (201) is slidably connected with a piston block (202); ), the piston block (202) is evenly distributed with ventilation holes (202a), and a check valve (204) is connected to the bottom end of the ventilation hole (202a), the lower end of the piston block (202) is vertically connected to a piston rod (205), two pairs of hinge bars (206) are hinged front and back below the lower mold (110), and a cooling box (207) is hinged to the lower ends of all the hinge bars (206), and a plurality of cooling holes (207a) are centrally distributed on the bottom surface of the cooling box (207).

4. A plastic flange injection molding mold according to claim 1, characterized in that: A pair of guide pillars (105) are symmetrically connected to the casting plate (104), and the guide pillars (105) are slidably connected to the top mounting plate (101) via guide sleeves (106).

5. The plastic flange injection molding mold according to claim 2, characterized in that: The lower side of the lower mold (110) is symmetrically provided with an X-shaped sliding groove (110b), and an X-shaped sliding frame (112) is slidably connected in the sliding groove (110b); the upper side of the sliding frame (112) is evenly distributed with discharge pins (113), and the discharge pins (113) are slidably installed in the bottom of the molding cavity (110a); the upper side of the sliding frame (112) is evenly distributed with guide pins (110a), and the guide pins (110a) are slidably installed around the molding cavity (110a); and a plurality of compression springs (115) are evenly connected between the lower side of the sliding frame (112) and the lower mold (110).

6. The plastic flange injection molding mold according to claim 1, characterized in that: The lower mold (110) is inlaid with an annular cooling pipe (116) around the molding cavity (110a).

7. The plastic flange injection molding mold according to claim 3, characterized in that: A pair of compression springs (208) are symmetrically connected between the cooling box (207) and the upper mold (107) in a front-to-back manner.

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