Injection mold opening device

Abstract

The utility model provides a mold opening device for an injection mold, which relates to the technical field of injection molds and comprises two fixing frames, an upper mold and a lower mold, the upper mold and the lower mold are arranged in the fixing frames, a first linkage mechanism and a second linkage mechanism are respectively arranged on two sides of the fixing frames, a driving mechanism is arranged on one side of the second linkage mechanism, and a jacking mechanism is arranged at the lower end of the lower mold. The jacking mechanism comprises a hydraulic oil cylinder, a primary jacking assembly and a secondary jacking assembly, and the driving end of the hydraulic oil cylinder is connected with the secondary jacking assembly. The utility model has the beneficial effects that through the structural design of a lower opening mode, the lower mold is separated from the upper mold and is moved out towards the front end at the same time, so that the operation stability is ensured, convenience is provided for an operator to take out a molded product after demolding, and the safety production is ensured.

Description

Technical Field

[0001] The utility model mainly relates to the technical field of injection molds, and in particular to an injection mold opening device. Background Art

[0002] With the development of society, the use of plastic products in our lives is increasing. Due to its advantages such as low price, easy processing, light weight and good performance, more and more products are made of plastic.

[0003] Most plastic products are made by injection molding, which involves injecting molten plastic into the mold cavity of an injection mold through an injection molding machine. The plastic is cooled in the mold cavity and then formed. The mold cavity is then opened to take out the plastic product.

[0004] The inventor discovered the following defects during the operation of the specific embodiment:

[0005] At present, most injection molds are opened from top to bottom. After the mold is opened, the demolding mechanism ejects the product from the cavity. Finally, the operator reaches between the upper and lower molds to take the molded product out of the lower mold cavity. In the actual operation process, since most mold equipment is very high, the operator needs to use a ladder and stand at a high place to work, which poses a greater risk.

[0006] It should be noted that the above contents belong to the technical cognition scope of the inventor. Since the technical contents in this field are vast and too complicated, the above contents of this application do not necessarily constitute prior art. Utility Model Content

[0007] 1. Technical problems to be solved by the utility model:

[0008] The utility model provides an injection mold opening device to solve the technical problems existing in the above-mentioned background technology.

[0009] 2. Technical solution:

[0010] To achieve the above-mentioned purpose, the technical solution provided by the utility model is as follows: an injection mold opening device, comprising two fixed frames and an upper mold and a lower mold arranged in the fixed frames, a first linkage mechanism and a second linkage mechanism are respectively arranged on both sides of the fixed frames, a driving mechanism is arranged on one side of the second linkage mechanism, a jacking mechanism is arranged at the lower end of the lower mold, a lower mold core and a demoulding panel are embedded in the lower mold, and the two sides of the lower mold are respectively connected to the first linkage mechanism and the second linkage mechanism, the jacking mechanism comprises a hydraulic cylinder, a primary jacking assembly and a secondary jacking assembly, the driving end of the hydraulic cylinder is connected to the secondary jacking assembly, and the primary jacking assembly comprises A top plate one and a top plate two, square irons are provided on both sides of the top plate one and the top plate two, a bottom plate is provided at the lower end of the square iron, a limiting groove is provided on the inner side of the square iron, a seesaw is provided in the limiting groove, a plurality of top rods one and two are provided on the top plate one, the upper end of the top rod one is connected to the demoulding panel, the seesaw is located at a lower end of the top plate and is rotatably connected to the top plate two, a guide roller is provided at one end of the seesaw close to the limiting groove, the guide roller is located in the limiting groove, the secondary lifting assembly comprises an inverted T-shaped plate, the upper end of the T-shaped plate passes through the bottom plate and is abutted against the top plate two, and a plurality of spring columns are provided between the T-shaped plate and the bottom plate.

[0011] Furthermore, the first linkage mechanism includes connecting rod 1, connecting rod 2, connecting rod 3 and connecting rod 4 which are rotatably connected to each other, one end of connecting rod 1 and connecting rod 3 are connected to driven gear 1, and one side of the two driven gears 1 is provided with a rack meshing with them.

[0012] Furthermore, the second linkage mechanism includes connecting rods 5, 6, 7 and 8 which have the same structure as connecting rods 1, 2, 3 and 4, a driven gear 3 is provided at one end of connecting rod 5, a driving shaft is provided between driven gear 1 and driven gear 3, and a positioning shaft connected to the lower mold is provided at one end of connecting rod 4 and connecting rod 8.

[0013] Furthermore, the driving mechanism includes a hydraulic rotary motor and a driving gear, and the driven gear three is meshingly connected with the driving gear.

[0014] Furthermore, a sliding groove is provided on the fixing frame, and the sliding groove includes a transverse section, a lifting section and a vertical section, and the upper mold is fixedly connected to the fixing frame through a positioning plate.

[0015] 3. Beneficial effects:

[0016] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0017] The utility model has a reasonable design. Through the structural design of the lower opening mode, the lower mold is separated from the upper mold and moved out to the front end at the same time, which ensures the operation stability and provides convenience for the operator to take out the molded product after demoulding, thereby ensuring safe production.

[0018] During the mold opening process, the lower mold is ensured to have a certain support stability during the movement along the running track through the first linkage mechanism and the second linkage mechanism on both sides;

[0019] After the mold is opened, the secondary lifting assembly is used to provide support to the lower end of the lower mold to ensure stable operation of the overall structure.

[0020] It should be noted that the structures not introduced in the present invention are not related to the design points and improvement directions of the present invention, and are the same as the prior art or can be implemented by using the prior art, and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the overall structure of the utility model from another angle;

[0023] Figure 3 This is another schematic diagram of the overall structure of the utility model from another angle;

[0024] Figure 4 It is a partial structural explosion diagram of the utility model;

[0025] Figure 5 It is another partial structural schematic diagram of the utility model.

[0026] Reference numerals:

[0027] 1. Fixed frame; 101. Sliding groove; 1011. Horizontal section; 1012. Lifting section; 1013. Vertical section; 2. Upper die; 3. Lower die; 301. Lower die core; 302. Demolding panel; 4. First linkage mechanism; 401. Connecting rod 1; 402. Connecting rod 2; 403. Connecting rod 3; 404. Connecting rod 4; 405. Driven gear 1; 406. Rack; 5. Second linkage mechanism; 501. Connecting rod 5; 502. Connecting rod 6; 503. Connecting rod 7; 504. Connecting rod 8; 505. Driven gear 3; 6. Driving mechanism; 601, hydraulic rotary motor; 602, driving gear; 7, lifting mechanism; 701, hydraulic cylinder; 702, primary lifting assembly; 7021, top plate one; 7022, top plate two; 7023, square iron; 7024, limiting groove; 7025, seesaw; 7026, top rod one; 7027, bottom plate; 7028, guide roller; 7029, top rod two; 703, secondary lifting assembly; 7031, T-shaped plate; 7032, spring column; 8, driving shaft; 9, positioning shaft; 10, positioning plate. DETAILED DESCRIPTION

[0028] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "page", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", "provided with", "provided on" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Example

[0032] See attached Figure 1-5 A mold opening device for an injection mold comprises two fixing frames 1 and an upper mold 2 and a lower mold 3 arranged in the fixing frames 1, a first linkage mechanism 4 and a second linkage mechanism 5 are respectively arranged on both sides of the fixing frames 1, a driving mechanism 6 is arranged on one side of the second linkage mechanism 5, a lifting mechanism 7 is arranged at the lower end of the lower mold 3, a lower mold core 301 and a demolding panel 302 are embedded in the lower mold 3, and both sides of the lower mold 3 are respectively connected with the first linkage mechanism 4 and the second linkage mechanism 5, the lifting mechanism 7 comprises a hydraulic cylinder 701, a primary lifting assembly 702 and a secondary lifting assembly 703, and the driving end of the hydraulic cylinder 701 is connected to the secondary lifting assembly 703.

[0033] See attached Figure 1-5 The first linkage mechanism 4 includes a connecting rod 1 401, a connecting rod 2 402, a connecting rod 3 403 and a connecting rod 4 404 which are rotatably connected to each other. The connecting rod 1 401 and the connecting rod 3 403 are connected through the connecting rod 2 402. One end of the connecting rod 1 401 and the connecting rod 3 403 are connected to a driven gear 1 405. One end of the connecting rod 1 401 and the connecting rod 3 403 are fixedly connected to the driven gear 1 405. One side of the two driven gears 1 405 is provided with a rack 4 meshing therewith. 06, the rack 406 has a slide seat connected to the fixed frame 1, which moves up and down through the slide seat. The first linkage mechanism 4 and the second linkage mechanism 5 are connected through the driving shaft 8 to achieve synchronous movement. The two driven gears 1 405 achieve synchronous rotation through the rack 406. The two driven gears 1 405 drive the connecting rod 1 401 and the connecting rod 3 403 to rotate accordingly, thereby driving the connecting rod 404 together with the positioning shaft 9 to slide along the sliding groove 101 on the fixed frame 1.

[0034] See attached Figure 1-5The second linkage mechanism 5 includes a connecting rod 501, a connecting rod 602, a connecting rod 703 and a connecting rod 804 with the same structure as the connecting rod 1 401, the connecting rod 2 402, the connecting rod 3 403 and the connecting rod 4 404. A driven gear 3 505 is provided at one end of the connecting rod 501. One end of the connecting rod 501 is fixedly connected to the driven gear 3 505. A driving shaft 8 is provided between the driven gear 1 405 and the driven gear 3 505. One end of the connecting rod 404 and the connecting rod 8 504 is provided with a positioning shaft 9 connected to the lower mold 3. The driven gear 3 505 rotates through the driving gear 602, driving the connecting rod 5 501 to rotate accordingly, so that the connecting rod 8 504 connected thereto slides together with the positioning shaft 9 along the sliding groove 101 on the fixed frame 1. The other ends of the two positioning shafts 9 are provided with positioning blocks fixedly connected to both sides of the lower mold 3. When the positioning shaft 9 slides along the sliding groove 101, the lower mold 3 and the primary lifting assembly 702 are driven to move.

[0035] See attached Figure 1-5 The driving mechanism 6 includes a hydraulic rotary motor 601 and a driving gear 602, the driven gear three 505 is meshed and connected with the driving gear 602, the driving end of the hydraulic rotary motor 601 is connected with the driving gear 602, the driving gear 602 is driven by the hydraulic rotary motor 601 and rotates, driving the driven gear three 505 to rotate, and the driven gear one 405 rotates together with the driven gear three 505 through the driving shaft 8.

[0036] See attached Figure 1-5 The lower mold 3 is embedded with a lower mold core 301 and a demoulding panel 302. The two sides of the lower mold 3 are respectively connected to the first linkage mechanism 4 and the second linkage mechanism 5. The demoulding panel 302 is located on the outer side of the lower mold core 301. After the injection molded product is extruded, redundant flash will be generated on the edge. The demoulding panel 302 can be used to push a part of the flash upward to facilitate subsequent demoulding. The lower end of the demoulding panel 302 is connected to the primary ejection component 702 through multiple ejector rods 7026.

[0037] See attached Figure 1-5The primary lifting assembly 702 includes a top plate 1 7021 and a top plate 2 7022. Square irons 7023 are provided on both sides of the top plate 1 7021 and the top plate 2 7022. A bottom plate 7027 is provided at the lower end of the square iron 7023. A limiting groove 7024 is provided inside the square iron 7023. A seesaw 7025 is provided in the limiting groove 7024. A plurality of top rods 1 7026 and top rods 2 7029 are provided on the top plate 1 7021. The upper end of the top rod 1 7026 is connected to the demoulding panel 302. The length of the top rod 1 7026 is greater than the length of the top rod 2 7029. The seesaw 7025 is located at the lower end of the top plate 1 7021 and is rotatably connected to the top plate 2 7022. The seesaw 7025 is close to the limiting groove 7024. A guide roller 7028 is provided at one end, and the guide roller 7028 is located in the limiting groove 7024. The top plate 2 7022 pushes the top plate 1 7021 upward until the guide roller 7028 on the seesaw 7025 contacts the top of the limiting groove 7024 and stops. The guide roller 7028 rolls along the limiting groove 7024 during the rising process. At this time, the top plate 1 7021 drives multiple ejector rods 1 7026 and the demoulding panel 302 to push out a part of the flash on the edge of the molding cavity upward to achieve one-time demoulding.

[0038] See attached Figure 1-5 The secondary lifting assembly 703 includes an inverted T-shaped plate 7031. The upper end of the T-shaped plate 7031 penetrates the bottom plate 7027 and is in contact with the second top plate 7022. A plurality of spring columns 7032 are arranged between the T-shaped plate 7031 and the bottom plate 7027. The lower end of the T-shaped plate 7031 is lifted upward by the hydraulic cylinder 701, and the upper end of the T-shaped plate 7031 lifts the second top plate 7022 upward. The plurality of ejector rods 1 7026 and the demoulding panel 302 are ejected in one lift. Then the T-shaped plate 7031 continues to be lifted upward, and the second top plate 7022 continues to push the first top plate 7021. At this time, the seesaw 7025 is lifted upward with the second top plate 7022, and the first top plate 7021 is pushed upward and separated from the second top plate 7022. After the first top plate 7021 is pushed to the limit, the second ejector rod 7029 is driven to eject the molded product out of the molding cavity, thereby realizing secondary demoulding.

[0039] See attached Figure 1-5 A sliding groove 101 is provided on the fixed frame 1, and the sliding groove 101 includes a horizontal section 1011, a lifting section 1012 and a vertical section 1013. When the mold is opened, the two positioning shafts 9 connected to the lower mold 3 slide downward and forward along the vertical section 1013, the lifting section 1012 and the horizontal section 1011 in sequence, and are separated from the upper mold to realize the mold opening action. The upper mold 2 is fixedly connected to the fixed frame 1 through the positioning plate 10. In this technical solution, the upper mold 2 is in a fixed state, and the mold opening is realized by the downward and forward sliding action of the lower mold 3.

[0040] In this embodiment, there is a clamping mechanism between the upper mold 2 and the lower mold 3. In the mold closing state, the upper mold 2 and the lower mold 3 are connected up and down through the clamping mechanism. The operation method of opening the mold body is as follows:

[0041] When opening the mold, the locking mechanisms of the upper mold 2 and the lower mold 3 are unlocked and opened, the driving mechanism 6 is started, and the hydraulic rotary motor 601 drives the driving gear 602 to rotate, and the driving gear 602 drives the driven gear three 505 and the driven gear one 405 to rotate at the same time, so as to realize the simultaneous movement of the first linkage mechanism 4 and the second linkage mechanism 5, and the positioning shaft 9 on the first linkage mechanism 4 and the second linkage mechanism 5 drives the lower mold 3 and the primary lifting component 702 to gradually move downward and forward along the sliding groove 101 on the fixed frame 1, until the lower mold 3 and the primary lifting component 702 move to the top of the secondary lifting component 703, so that the lower mold 3 can be moved out to the front end at the same time when opening the mold, which is convenient for the operator to take out the molded product at the front end of the mold;

[0042] During demoulding, the hydraulic cylinder 701 pushes the T-shaped plate 7031 upward, and the T-shaped plate 7031 is partially lifted upward, and the ejector rod 1 7026 drives the demoulding panel 302 to eject the flash part of the molded product. Then the T-shaped plate 7031 continues to be lifted by the hydraulic cylinder 701 until the ejector rod 2 7029 ejects the molded product, completing the demoulding, and finally it is taken out by the operator.

[0043] To sum up, during the mold opening process, the first linkage mechanism and the second linkage mechanism on both sides of the lower mold ensure a certain support stability in the process of moving along the running trajectory. After the mold is opened, the secondary jacking assembly realizes the support force on the lower end of the lower mold to ensure the stable operation of the overall structure. The technical solution adopts the structural design of the lower opening mode, and moves out to the front end while the lower mold is separated from the upper mold. While ensuring the operation stability, it also provides convenience for the operator to take out the molded product after demolding, ensuring safe production.

[0044] The above-described embodiments only express a certain implementation method of the utility model, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the patent of the utility model shall be based on the attached claims.

Claims

1. An injection mold opening device, comprising two fixing frames (1) and an upper mold (2) and a lower mold (3) arranged in the fixing frames (1), characterized in that: A first linkage mechanism (4) and a second linkage mechanism (5) are respectively arranged on both sides of the fixing frame (1); a driving mechanism (6) is arranged on one side of the second linkage mechanism (5); a lifting mechanism (7) is arranged at the lower end of the lower die (3); a lower die core (301) and a demoulding panel (302) are embedded in the lower die (3); both sides of the lower die (3) are respectively connected to the first linkage mechanism (4) and the second linkage mechanism (5); the lifting mechanism (7) comprises a hydraulic cylinder ( 701), a primary lifting component (702) and a secondary lifting component (703), wherein a driving end of the hydraulic cylinder (701) is connected to the secondary lifting component (703), the primary lifting component (702) comprises a top plate 1 (7021) and a top plate 2 (7022), square irons (7023) are provided on both sides of the top plate 1 (7021) and the top plate 2 (7022), a bottom plate (7027) is provided at the lower end of the square iron (7023), and the square iron (70 23) is provided with a limiting groove (7024) on the inner side, and a seesaw (7025) is provided in the limiting groove (7024), and a plurality of top rods (7026) and top rods (7029) are provided on the top plate (7021), and the upper end of the top rod (7026) is connected to the demoulding panel (302), and the seesaw (7025) is located at the lower end of the top plate (7021) and is rotatably connected to the top plate (7022), and the seesaw (7025) is close to the top plate (7021). A guide roller (7028) is provided at one end of the limiting groove (7024), and the guide roller (7028) is located in the limiting groove (7024). The secondary lifting component (703) comprises an inverted T-shaped plate (7031), and the upper end of the T-shaped plate (7031) passes through the bottom plate (7027) and is abutted against the second top plate (7022). A plurality of spring columns (7032) are provided between the T-shaped plate (7031) and the bottom plate (7027).

2. The injection mold opening device according to claim 1, characterized in that: The first linkage mechanism (4) comprises a connecting rod 1 (401), a connecting rod 2 (402), a connecting rod 3 (403) and a connecting rod 4 (404) which are rotatably connected to each other, one end of each of the connecting rod 1 (401) and the connecting rod 3 (403) is connected to a driven gear 1 (405), and one side of each of the two driven gears 1 (405) is provided with a rack (406) which meshes with the driven gears 1 (405).

3. The injection mold opening device according to claim 2, characterized in that: The second linkage mechanism (5) comprises a connecting rod five (501), a connecting rod six (502), a connecting rod seven (503) and a connecting rod eight (504) having the same structure as the connecting rod one (401), the connecting rod two (402), the connecting rod three (403) and the connecting rod four (404); a driven gear three (505) is provided at one end of the connecting rod five (501); a driving shaft (8) is provided between the driven gear one (405) and the driven gear three (505); and a positioning shaft (9) connected to the lower mold (3) is provided at one end of each of the connecting rod four (404) and the connecting rod eight (504).

4. The injection mold opening device according to claim 3, characterized in that: The driving mechanism (6) comprises a hydraulic rotary motor (601) and a driving gear (602), and the driven gear three (505) is meshingly connected with the driving gear (602).

5. The injection mold opening device according to claim 1, characterized in that: The fixed frame (1) is provided with a sliding groove (101), the sliding groove (101) comprising a transverse section (1011), a lifting section (1012) and a vertical section (1013), and the upper mold (2) is fixedly connected to the fixed frame (1) via a positioning plate (10).

Images