Electric blow molding mold closing equipment
By using an electric drive system in the blow molding mold closure equipment, the active swing arm and the driven swing arm are driven to move the template together, the problems of large impact and unbalanced force in existing hydraulic equipment are solved, and a more stable and smooth blow molding mold closure operation is achieved.
Patent Information
- Application Number
- CN202411596595.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-11
- Publication Date
- 2025-06-03
AI Technical Summary
The existing blow molding and molding equipment driven by hydraulic mechanisms has problems such as large action impact, special buffering treatment, and unbalanced formwork.
The blow molding mold closure equipment is adopted to drive the active swing arm to rotate through the drive motor, and the front and rear driven swing arms move in the forward and rear directions respectively to achieve balanced force and buffering movement of the template.
It reduces the vibration and noise of the equipment, realizes the balanced force of the template, reduces the impact force during mold closing, and improves the operating stability of the equipment.
Smart Images
Figure CN120080532A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of blow molding, and in particular to an electric blow molding clamping device. Background Art
[0002] A blow molding die is a tool used in the plastic blow molding process. In the blow molding process, a thermoplastic blank extruded from an extruder is first placed in the blow molding die, and then compressed air is introduced into the blow molding die to expand the blank, and the blank deforms along the die cavity, thereby blow molding a hollow product with a specific shape and size.
[0003] A blow molding clamping device is a device used to drive a blow molding die to perform the operations of mold opening and closing. The existing blow molding clamping devices generally use a hydraulic mechanism to push a template to move in the front-rear direction, which has many disadvantages such as large action impact, the need for special buffer treatment, and unbalanced force on the template. Summary of the Invention
[0004] To solve the above-mentioned related technical problems of the blow molding clamping device using a hydraulic mechanism, the purpose of the present application is to provide a new type of electric blow molding clamping device.
[0005] In order to achieve the above-mentioned purpose, the present application provides the following technical solutions: an electric blow molding mold clamping device, which can carry a blow mold and perform mold separation and clamping operations, the blow mold comprising a first module and a second module that can be separated and clamped, and the electric blow molding mold clamping device comprising: a supporting assembly, comprising a bottom bracket and a supporting seat that can be supported on the bottom bracket in the front-to-back direction; a rear template that can be slidably installed on the supporting seat in the front-to-back direction, the rear template having a first clamping part that can carry the first module; a front template that is transmission-connected to the supporting seat and can be driven by the supporting seat to move back and forth, the front template having a second clamping part that can carry the second module, the first clamping part and the second clamping part being arranged opposite to each other in the front-to-back direction; and a driving assembly, comprising a driving motor fixed relative to the bottom bracket, an active swing arm having a first end and a second end that are far away from each other, a front driven swing arm that can be swung around a first axis and connected to the first end, and a front driven swing arm that can be swung around a second axis. The rear driven swing arm on the second end is swingably connected to the axis, the front driven swing arm can be swingably connected to the rear template around the third axis, and the rear driven swing arm can be swingably connected to the support seat around the fourth axis; wherein, the active swing arm is transmission-connected to the drive motor and can be driven by the drive motor to rotate around the fifth axis, and the first axis, the second axis, the third axis, the fourth axis and the fifth axis are parallel to each other; the electric blow molding clamping device has a clamping state in which the first module and the second module are in contact and a parting state in which the first module and the second module are separated. When the electric blow molding clamping device switches from the parting state to the clamping state, the angle between the front driven swing arm and the active swing arm continues to increase, the rear template is pushed forward by the front driven swing arm, the angle between the rear driven swing arm and the active swing arm continues to increase, and the support seat is pushed backward by the rear driven swing arm.
[0006] In the above technical solution, preferably, when the electric blow molding clamping device is in the clamping state, the angle between the front driven swing arm and the active swing arm is 180°, and the angle between the rear driven swing arm and the active swing arm is 180°.
[0007] In the above technical solution, preferably, when the electric blow molding clamping device is in the clamping state, the active swing arm is in a posture of extending forward and backward.
[0008] In the above technical solution, preferably, when the electric blow molding clamping device is in the mold separation state, the active swing arm is in a posture of extending left and right.
[0009] In the above technical solution, preferably, a first joint plate is fixedly arranged on the back of the rear template, and the front driven swing arm is swingably connected to the first joint plate around a third axis line.
[0010] In the above technical solution, preferably, the support seat includes a rear upright portion extending vertically, and a second joint plate is fixedly arranged on the rear upright portion, and the rear driven swing arm is swingably connected to the second joint plate around a fourth axis line.
[0011] In the above technical solution, preferably, the driving assembly further includes a motor bracket fixed relative to the bottom bracket, and the driving motor is fixedly installed on the motor bracket.
[0012] In the above technical solution, preferably, a pair of top slide rails extending in the front-back direction are arranged at the top of the support seat, and the rear template is slidably supported on the pair of top slide rails in the front-back direction.
[0013] In the above technical solution, preferably, the electric blow molding clamping device further includes a thickness fine-tuning assembly. The thickness fine-tuning assembly includes an adjusting stud fixed on the support seat and an adjusting screw rod threadedly engaged with the adjusting stud. The adjusting stud and the adjusting screw rod both extend in the front-back direction and are relatively rotatable; the front template is slidably supported on the support seat, and the adjusting screw rod is connected to the front template and can drive the front template to move back and forth. Further preferably, the thickness fine-tuning assembly further includes a pressure sensor fixedly installed behind the front template, and the adjusting screw rod is connected to the pressure sensor.
[0014] The electric clamping device provided by the present application has the following beneficial effects: First, the driving motor simultaneously pushes the front and rear driven swing arms to move forward and backward respectively, and the force is relatively balanced, which can reduce the vibration and noise of the electric blow molding clamping device; Second, during the process of the front and rear templates moving towards each other, the included angles between the front and rear driven swing arms and the active swing arm continuously increase. Since the active swing arm moves in a circular motion, that is, the forward moving component speeds of the front and rear driven swing arms continuously decrease. It can be understood that when the electric blow molding clamping device performs the clamping operation, the moving speeds of the front and rear templates show a gradually decreasing trend, and finally the front and rear templates are clamped at a lower speed, reducing the impact force of the front and rear templates during clamping. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 is a perspective view of the electric blow molding clamping device provided by the present invention; Figure 2 is Figure 1 a side view of the shown electric blow molding clamping device in the front-back direction; Figure 3 is Figure 1 the top view of the electric blow molding clamping device shown; Figure 4 is Figure 1 the top view of the drive assembly of the electric blow molding clamping device shown; wherein, the electric blow molding clamping device shown is in the clamping state; Figure 5 is Figure 1 the top view of the drive assembly of the electric blow molding clamping device shown; wherein, the electric blow molding clamping device shown is in the mold opening state.
[0016] 100. Electric blow molding clamping device; 10. First module; 20. Second module; 11. Bottom bracket; 12. Support seat; 13. Bottom slide rail; 14. Slide seat; 15. Top slide rail; 16. Slide block; 17. Limit block; 18. Rear upright part; 19. Front upright part; 2. Rear template; 21. First support part; 22. First clamping part; 31. Motor frame; 32. Driving motor; 33. Active swing arm; 34. Front driven swing arm; 35. Rear driven swing arm; 36. First joint plate; 37. Second joint plate; 4. Front template; 41. Second support part; 42. Second clamping part; 51. Rotating shaft seat; 52. Adjusting screw rod; 53. Pressure sensor; Y. Motor axis line. Detailed implementation manners
[0017] To describe in detail the technical content, structural features, achieved objectives and effects of the present application, the technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.
[0018] In the present application, spatial relative terms such as "under", "below", "beneath", "lower", "above", "upper", "on", "higher", "side" (for example, as in "side wall"), etc. are used to describe the relationship between one element and another (other) element as shown in the accompanying drawings. The spatial relative terms are intended to include different orientations of the device in use, operation and / or manufacture in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is flipped, the element described as "under" or "beneath" another element or feature will subsequently be positioned "above" the other element or feature. Therefore, the exemplary term "under" can include both the upper and lower orientations. In addition, the device can be positioned otherwise (for example, rotated 90 degrees or in other orientations), and thus, the corresponding spatial relative descriptive terms used herein are interpreted accordingly.
[0019] As shown Figure 1-2 in the figure, the present invention provides an electric blow molding clamping device 100, on which a blow molding die can be carried and the mold clamping operation can be performed. The blow molding die includes a first module 10 and a second module 20 that can perform mold clamping and opening operations. When the blow molding die is carried on the electric blow molding clamping device 100, the first and second modules are strictly oppositely arranged in the front-back direction.
[0020] The electric blow molding clamping device 100 includes a support assembly for providing support, a rear template 2 movably carried on a base 1, a driving assembly for driving the rear template 2 to move, a front template 4 movably carried on the base 1, and a thickness fine-tuning assembly for finely adjusting the distance between the front and rear templates. Among them, in this application, the moving direction of the front and rear templates is defined as the front-back direction, and the front template is located on the front side of the rear template; Figure 2 the direction perpendicular to the front-back direction on the paper surface is defined as the vertical direction; Figure 3 the direction perpendicular to the front-back direction on the paper surface is defined as the left-right direction.
[0021] The support assembly includes a bottom bracket 11 fixedly installed on the ground or pedestal and a support seat 12 carried on the bottom bracket 11. Specifically, a pair of bottom slide rails 13 extending in the front-back direction are arranged at the bottom of the support seat 12, and a plurality of slide seats 14 slidably engaged with the above bottom slide rails 13 are fixedly installed on the bottom bracket 11. Through the cooperation of the bottom slide rails 13 and the slide seats 14, the support seat 12 can be supported on the bottom bracket 11 so as to move back and forth.
[0022] In addition, a pair of top slide rails 15 extending in the front-back direction are arranged at the top of the support seat 12, and a plurality of sliders 16 that can slide in the front-back direction are arranged on the top slide rails 15 for use by the front and rear templates.
[0023] Furthermore, a limit block 17 is also arranged on the base 1 to limit the minimum distance between the front and rear templates.
[0024] The rear template 2 has a first support portion 21 located at the bottom and extending in the front-back direction and a first mold clamping portion 22 integrally formed on the upper side of the first support portion 21. The first support portion 21 is fixedly installed on a plurality of sliders 16 and is slidably supported on the support seat 12 in the front-back direction through the plurality of sliders 16. The first mold clamping portion 22 extends vertically and is configured to be used for carrying the first module 10. Among them, the first module 10 can be fixed to the first mold clamping portion 22 by various methods such as bolt connection, clamping, magnetic attraction, etc., which is not limited herein.
[0025] Similarly, the front template 4 has a second support portion 41 located at the bottom and extending longitudinally, and a second clamping portion 42 integrally formed on the upper side of the second support portion 41. The second support portion 41 is fixedly mounted on a plurality of sliders 16 and is slidably supported on the support base 12 in the longitudinal direction by the plurality of sliders 16. The second clamping portion 42 extends vertically and is configured to carry the second module 20. The second module 20 can be fixed to the second clamping portion 42 by various means such as bolt connection, snap connection, magnetic attraction, etc., which is not limited herein.
[0026] Combined Figure 3 , the driving assembly includes a motor frame 31 fixedly connected to the bottom bracket 11, a driving motor 32 mounted on the motor frame 31, a driving swing arm 33 drivingly connected to the driving motor 32, and a front driven swing arm 34 and a rear driven swing arm 35 disposed on the front and rear sides of the driving swing arm 33, respectively. The motor frame 31 is disposed at the rear side of the rear template 2.
[0027] The driving motor 32 has a motor housing (not labeled in the figure) fixedly mounted on the motor frame 31 and a motor shaft (not labeled in the figure) rotatable relative to the motor housing. The motor shaft has a vertically extending motor axis Y. The driving swing arm 33 extends horizontally and has a middle portion, a first end portion, and a second end portion that are spaced apart from each other. The middle portion of the driving swing arm 33 is fixedly connected (including direct connection and indirect connection) to the motor shaft of the driving motor 32 and can be driven by the motor shaft to rotate about the motor axis Y.
[0028] A first joint plate 36 is fixedly provided on the back of the rear template 2 (i.e., the side without carrying the first module 10). The front driven swing arm 34 has a third end portion and a fourth end portion that are spaced apart from each other. The third end portion thereof is swingably connected to the first end portion of the driving swing arm 33 about a first axis (not shown in the figure, the same below), and the fourth end portion thereof is swingably connected to the first joint plate 23 of the rear template 2 about a second axis.
[0029] The rear end of the support base 12 extends upward to form a rear upright portion 18, and a second joint plate 37 is fixedly mounted on the rear upright portion 18. Similarly, the rear driven swing arm 35 has a fifth end portion and a sixth end portion that are spaced apart from each other. The fifth end portion thereof is swingably connected to the second end portion of the driving swing arm 33 about a third axis, and the sixth end portion thereof is swingably connected to the second joint plate 37 about a fourth axis. The first, second, third, and fourth axes are all parallel to the motor axis Y.
[0030] A transmission connection is formed between the front template 4 and the support base 12, and the support base 12 can drive the front template 4 to move forward and backward together. Refer to Figure 3-5, the electric blow molding clamping device 100 has a clamping position where the front and rear templates are in contact and a mold opening position where the front and rear templates are separated. When the electric blow molding clamping device 100 performs a clamping operation, the motor shaft of the drive motor 32 rotates in the first direction and drives the active swing arm 33 to rotate. The angle formed between the front driven swing arm 34 and the active swing arm 33 continuously increases, and the front driven swing arm 34 is pushed forward by the active swing arm 33, thereby driving the rear template 2 to move forward; at the same time, the angle formed between the rear driven swing arm 35 and the active swing arm 33 continuously increases, and the rear driven swing arm 35 is pushed backward by the active swing arm 33, thereby driving the support seat 12 and the front template 4 to move forward together. When the front and rear templates are in contact, the electric blow molding clamping device 100 reaches the clamping state, and the drive motor 32 stops working.
[0031] When the electric blow molding clamping device 100 performs a mold opening operation, the drive motor 32 rotates in the second direction opposite to the first direction, and its action process is opposite to the above-mentioned clamping operation, so it will not be elaborated here.
[0032] Compared with the prior art, the drive assembly provided in this embodiment has the following beneficial effects: First, the drive motor 32 simultaneously pushes the front and rear driven swing arms to move forward and backward respectively, and the force is relatively balanced, which can reduce the vibration and noise of the electric blow molding clamping device 100; Second, during the process of the front and rear templates moving towards each other, the angles between the front and rear driven swing arms and the active swing arm 33 continuously increase. Since the active swing arm 33 performs a circular motion, that is, the forward component velocities of the front and rear driven swing arms continuously decrease. It can be understood that when the electric blow molding clamping device 100 performs a clamping operation, the moving speeds of the front and rear templates show a gradually decreasing trend, and finally the front and rear templates are clamped at a lower speed, reducing the impact force when the front and rear templates are clamped.
[0033] Furthermore, as Figure 4 shown, the drive assembly is configured such that when the electric blow molding clamping device 100 is in the clamping state, both the front and rear driven swing arms form an angle of 180° with the active swing arm 33 to minimize the speed when the front and rear templates are clamped. In addition, since the angles between both the front and rear driven swing arms and the active swing arm 33 exceed 180°, the active swing arm 33 will drive the front and rear driven swing arms to return. Therefore, this design effectively limits the maximum stroke of the front and rear templates and effectively avoids the generation of huge pressure between the front and rear templates due to factors such as insufficient control accuracy or delayed stop of the drive motor 32.
[0034] Furthermore, as Figure 4As shown in FIG. 5, the drive assembly is configured such that when the electric blow molding clamping device 100 is in the clamping state, the active swing arm 33 extends in the front-rear direction; when the electric blow molding clamping device 100 is in the mold-opening state, the active swing arm 33 extends in the left-right direction. This design can shorten the lengths of the braking swing arm 32 and the front and rear driven swing arms, and reduce the overall size of the electric blow molding clamping device 100.
[0035] It should be noted here that in this embodiment, the first joint plate 36, the front driven swing arm 34, the active swing arm 33, the rear driven swing arm 35, and the second joint plate 37 are all rotatably connected in sequence through a vertically extending rotating shaft. In other embodiments, other methods (such as spherical connectors) can also be used to replace the rotating shaft in this embodiment to achieve the rotatable connection between the above components in sequence.
[0036] In addition, in this embodiment, the first, second, third, and fourth axis lines and the motor axis line Y all extend in the vertical direction. However, it can be understood that if the above axis lines are offset (such as horizontally arranged), the drive assembly can still bring the same beneficial effects. Therefore, the direction of the rotation axis lines between the above components does not limit the protection scope of this application.
[0037] Returning to Figure 1-2 , the front part of the support seat 12 extends vertically to form a front upright part 19. The thickness fine-tuning assembly includes a rotating shaft seat 51 fixedly installed on the front upright part 19, an adjusting stud (not shown in the figure) installed inside the rotating shaft seat 51, an adjusting screw rod 52 threadedly engaged with the adjusting stud, and a pressure sensor 53 fixedly installed on the back of the front template 4 (i.e., the side without the second module 20 mounted). The adjusting screw rod 52 and the adjusting stud both extend in the front-rear direction and can rotate relative to each other.
[0038] The side of the adjusting screw rod 52 close to the front template 4 is exposed and connected to the pressure sensor 53. The adjusting screw rod 52 is configured to drive the front template 4 to move together via the pressure sensor 53. Among them, the pressure sensor 53 has a certain deformation ability and feeds back the pressure between the adjusting screw rod 52 and the front template 4.
[0039] When the electric blow molding clamping device 100 performs a clamping operation, the driving motor 32 operates and drives the front and rear templates to the clamping position. Thereafter, the operator can rotate the adjusting stud or the adjusting screw rod 52 to move the adjusting screw rod 52 in the front and rear directions, thereby adjusting the deformation amount of the pressure sensor 53, the precise position of the front template 4, and the clamping pressure between the front and rear templates. The above clamping pressure is fed back to the operator through the pressure sensor 53 for the operator to finely adjust the front template 4 to a suitable clamping position. Thus, after several times of feedback and adjustment, the electric blow molding clamping device 100 can establish an appropriate clamping pressure, overcoming the inconvenience in the die debugging process of the transmission electric blow molding clamping device.
[0040] The above embodiments are only for illustrating the technical concept and features of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it accordingly, and should not be used to limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit of the present application should be covered within the protection scope of the present application.
Claims
1. An electric blow molding mold clamping device, which can carry a blow molding mold and perform mold separation and clamping operations, wherein the blow molding mold includes a first module and a second module that can be separated and clamped, characterized in that: The electric blow molding clamping device comprises: A support assembly, comprising a bottom support and a support seat supported on the bottom support so as to be movable forward and backward; A rear template is slidably mounted on the support seat in a front-rear direction, and the rear template has a first mold clamping portion that can carry the first module; A front mold plate is connected to the support seat and can be driven by the support seat to move forward and backward, the front mold plate has a second mold clamping part that can carry the second mold module, and the first mold clamping part and the second mold clamping part are arranged opposite to each other along the front-to-back direction; and A driving assembly, comprising a driving motor fixed relative to the bottom bracket, an active swing arm having a first end and a second end that are separated from each other, a front driven swing arm connected to the first end so as to be swingable around a first axis, and a rear driven swing arm connected to the second end so as to be swingable around a second axis, the front driven swing arm being connected to the rear template so as to be swingable around a third axis, and the rear driven swing arm being connected to the support seat so as to be swingable around a fourth axis; Among them, the active swing arm is transmission-connected to the drive motor and can be driven by the drive motor to rotate around the fifth axis, and the first axis, the second axis, the third axis, the fourth axis and the fifth axis are parallel to each other; the electric blow molding clamping equipment has a clamping state in which the first module and the second module are in contact and a parting state in which the first module and the second module are separated. When the electric blow molding clamping equipment switches from the parting state to the clamping state, the angle between the front driven swing arm and the active swing arm continues to increase, the rear template is pushed forward by the front driven swing arm, the angle between the rear driven swing arm and the active swing arm continues to increase, and the support seat is pushed backward by the rear driven swing arm.
2. The electric blow molding device according to claim 1, characterized in that: When the electric blow molding clamping device is in the clamping state, the angle between the front driven swing arm and the active swing arm is 180°, and the angle between the rear driven swing arm and the active swing arm is 180°.
3. The electric blow molding clamping device according to claim 1, characterized in that: When the electric blow molding clamping device is in the clamping state, the active swing arm is in a posture of extending forward and backward.
4. The electric blow molding clamping device according to claim 1 or 3, characterized in that: When the electric blow molding mold clamping device is in the mold separation state, the active swing arm is in a posture of extending left and right.
5. The electric blow molding clamping device according to claim 1, characterized in that: A first joint plate is fixedly arranged on the back of the rear template, and the front driven swing arm is connected to the first joint plate so as to be swingable around a third axis.
6. The electric blow molding clamping device according to claim 1, characterized in that: The support seat comprises a vertically extending rear upright portion, on which a second joint plate is fixedly arranged, and the rear driven swing arm is connected to the second joint plate so as to be swingable around a fourth axis.
7. The electric blow molding clamping device according to claim 1, characterized in that: The driving assembly also includes a motor frame fixed relative to the bottom bracket, and the driving motor is fixedly mounted on the motor frame.
8. The electric blow molding clamping device according to claim 1, characterized in that: A pair of top slide rails extending forward and backward are arranged on the top of the support seat, and the rear template can be supported on the pair of top slide rails in a forward and backward sliding manner.
9. The electric blow molding clamping device according to claim 1, characterized in that: It also includes a thickness fine-tuning component, which includes an adjusting stud fixed on the supporting seat and an adjusting screw rod threadedly matched with the adjusting stud, the adjusting stud and the adjusting screw rod both extend forward and backward and can rotate relative to each other; the front template can be slidably supported on the supporting seat, and the adjusting screw rod is connected to the front template and can drive the front template to move forward and backward.
10. The electric blow molding clamping device according to claim 9, characterized in that: The thickness fine-tuning assembly also includes a pressure sensor fixedly mounted on the back of the front template, and the adjusting screw rod is connected to the pressure sensor.