Rotary core-pulling device for elbow

Abstract

The utility model discloses a rotary core-pulling device for an elbow, which comprises a lower template, two correspondingly arranged mounting grooves are arranged on the lower template, a mold core is arranged between the two mounting grooves, core-pulling rotary driving mechanisms are arranged in the two mounting grooves, an elbow cavity and a core-pulling block mounting cavity are arranged on the mold core, the elbow cavity is communicated with the core-pulling block mounting cavity, and the core-pulling block mounting cavity is communicated with the core-pulling block mounting cavity. An arc-shaped sliding way is arranged at the bottom of the core-pulling block installation cavity, a sliding block is arranged in the arc-shaped sliding way and connected to a connecting rod, one end of the connecting rod is connected with the core-pulling block, the other end of the connecting rod is connected with a core-pulling rotation driving mechanism, and the core-pulling rotation driving mechanism can control the core-pulling block to rotate and stretch out and draw back in the elbow cavity. According to the utility model, the rotary telescopic function of the core-pulling block is adopted, so that the bent part of the elbow can be smoothly subjected to core pulling, the core-pulling block slides stably, and the problem of elbow deformation caused by swinging of the core-pulling block when the bent part of the elbow is subjected to core pulling can be prevented. The structure is simple, two elbows can be formed at the same time, and the production efficiency and the product percent of pass are improved.

Description

A type of elbow rotary core pulling device Technical Field

[0001] This utility model relates to the field of elbow forming molds, and in particular to an elbow rotating core pulling device. Background Technology

[0002] With continuous economic development and social progress, a wealth of consumer goods has been provided, creating favorable conditions for improving people's living standards and pursuing personalized lifestyles, thereby accelerating the demand for consumer goods. Plastic products are one such consumer good. Many plastic products are formed using plastic molds; therefore, plastic molds are widely used and prevalent in the plastic product molding industry.

[0003] Among the plastic products formed by plastic molds, those with curved structures are commonly seen, such as pipe products with curved elbows. Since curved structures cannot be directly demolded during the mold opening process, a core-pulling device is required between the fixed mold and the moving mold to pull the curved structure out from the side.

[0004] Currently, existing core-pulling devices use hydraulic cylinders to drive racks to move linearly, which in turn drives a gear set to actuate, ultimately using the actuated gear set to pull the core from the arc-shaped structure. However, using hydraulic cylinders, racks, and gear sets increases the size of the plastic mold and mold base, correspondingly increasing processing costs and making later maintenance inconvenient.

[0005] In view of this, there is an urgent need for a core-pulling mechanism that can reduce the volume of plastic molds and mold bases, improve the core-pulling effect of arc-shaped structures, and reduce costs to overcome the above-mentioned defects. Summary of the Invention

[0006] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this utility model is to provide a bending head rotating core pulling device.

[0007] The objective of this utility model is achieved through the following technical solution: a bend-end rotating core-pulling device, comprising a lower template, on which two corresponding mounting slots are provided, and a mold core is provided between the two mounting slots. A core-pulling rotating drive mechanism is provided in each of the two mounting slots. The mold core is provided with a bend-end cavity and a core-pulling block mounting cavity, which are connected. An arc-shaped slide is provided at the bottom of the core-pulling block mounting cavity, and a slider is provided within the arc-shaped slide. The slider is connected to a connecting rod, one end of which is connected to the core-pulling block, and the other end of which is connected to the core-pulling rotating drive mechanism. The core-pulling rotating drive mechanism can control the core-pulling block to rotate and extend within the bend-end cavity.

[0008] As an improvement to the elbow rotating core-pulling device of this utility model, one end of the core-pulling block is provided with an elbow forming module and the other end is provided with a slot. One end of the connecting rod extends into the slot. The core-pulling block is provided with a pin hole. A pin passes through the pin hole and positions the connecting rod. After the connecting rod is positioned by the pin, the rotation of the connecting rod can be realized.

[0009] As an improvement of the elbow rotating core-pulling device of this utility model, the core-pulling rotating drive mechanism includes a sliding block and a cylinder mounting plate. The sliding block is provided with limiting steps on both sides, and a connecting groove is provided at one end of the sliding block. A cylinder is provided on the cylinder mounting plate, and the cylinder mounting plate is installed on the lower template. A connecting block is provided at the piston rod end of the cylinder, and the connecting block is connected to the connecting groove. A connecting plate is provided at the other end of the sliding block, and a connecting hole and a straight core-pulling mechanism are provided on the connecting plate. One end of the connecting rod passes through the connecting hole and is positioned by a screw.

[0010] As an improvement of the elbow rotating core-pulling device of this utility model, when the core-pulling block is rotated and extended into the elbow cavity by the core-pulling rotating drive mechanism, the straight core is also extended into the elbow cavity at the same time, and the end of the elbow forming module abuts against the end of the straight core.

[0011] As an improvement of the elbow rotating core-pulling device of this utility model, the core-pulling rotating drive mechanism further includes two pressure blocks, which press on the limiting steps on both sides of the sliding block respectively. Fixed steps are provided on both sides of the mounting groove, and the pressure blocks are fixed on the fixed steps by screws.

[0012] As an improvement to the elbow rotary core-pulling device of this utility model, a mold core mounting groove is provided at the upper middle part of the lower template. The mold core is installed in the mold core mounting groove, and a flow channel is provided on the mold core. A water outlet is provided on the flow channel, and the water outlet is connected to the elbow cavity. There are two water outlets, each corresponding to one of the two elbow cavities, which can form two elbows simultaneously.

[0013] As an improvement to the elbow rotating core-pulling device of this utility model, notches are provided on both sides of the lower template, and the notches are connected to the mold core mounting groove. The notches facilitate the removal and installation of the mold core.

[0014] The beneficial effects of this utility model are as follows: This utility model adopts the rotation and telescopic function of the core-pulling block, which enables the bending part of the elbow to be pulled out smoothly. Moreover, the core-pulling block slides smoothly, which can prevent the bending part of the elbow from deforming due to the swing of the core-pulling block during core pulling. This utility model has a simple structure and can form two elbows at the same time, thereby improving production efficiency and product qualification rate. Attached Figure Description

[0015] Figure 1 is a perspective view of the present invention with the cover closed;

[0016] Figure 2 is a top view of this utility model;

[0017] Figure 3 is an exploded view of this utility model;

[0018] Figure 4 is a structural diagram of the core-pulling block of this utility model;

[0019] The attached diagram is labeled as follows: 1. Lower template, 2. Mounting slot, 3. Mold core, 4. Core-pulling rotation drive mechanism, 5. Elbow cavity, 6. Core-pulling block mounting cavity, 7. Arc-shaped slide, 8. Slider, 9. Connecting rod, 10. Core-pulling block, 11. Elbow forming module, 12. Slot, 13. Pin hole, 14. Pin, 15. Connecting slot, 16. Fixing step, 17. Mold core mounting slot, 18. Notch, 31. Flow channel, 32. Outlet, 41. Sliding block, 42. Hydraulic cylinder mounting plate, 43. Limiting step, 44. Connecting slot, 45. Hydraulic cylinder, 46. Connecting block, 47. Connecting plate, 48. Connecting hole, 49. Straight core-pulling block, 40. Screw, 401. Pressure block. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0021] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0022] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0023] As shown in Figures 1-4, a rotating core-pulling device for elbows includes a lower template 1 with two corresponding mounting slots 2. A mold core 3 is provided between the two mounting slots 2, and a core-pulling rotating drive mechanism 4 is provided in each of the two mounting slots 2. The mold core 3 has an elbow cavity 5 and a core-pulling block mounting cavity 6, which are connected. An arc-shaped slide 7 is provided at the bottom of the core-pulling block mounting cavity 6, and a slider 8 is provided in the arc-shaped slide 7. The slider 8 is connected to a connecting rod 9. One end of the connecting rod 9 is connected to the core-pulling block 10, and the other end of the connecting rod 9 is connected to the core-pulling rotating drive mechanism 4. The core-pulling rotating drive mechanism 4 can control the core-pulling block 10 to rotate and extend within the elbow cavity 5.

[0024] Preferably, one end of the core-pulling block 10 is provided with a bend forming module 11, and the other end is provided with a slot 12. One end of the connecting rod 9 extends into the slot 12. The core-pulling block 10 is provided with a pin hole 13, and a pin 14 passes through the pin hole 13 and positions the connecting rod 9. After the connecting rod 9 is positioned by the pin 14, the rotation of the connecting rod 9 can be realized. The bottom of the core-pulling block 10 is provided with a mating groove 15, which is engaged with the slider 8.

[0025] Preferably, the core-pulling rotation drive mechanism 4 includes a sliding block 41 and a cylinder mounting plate 42. Limiting steps 43 are provided on both sides of the sliding block 41. A connecting groove 44 is provided at one end of the sliding block 41. A cylinder 45 is provided on the cylinder mounting plate 42. The cylinder mounting plate 42 is mounted on the lower template 1. A connecting block 46 is provided at the piston rod end of the cylinder 45. The connecting block 46 is connected to the connecting groove 44. A connecting plate 47 is provided at the other end of the sliding block 41. A connecting hole 48 and a straight core puller 49 are provided on the connecting plate 47. One end of the connecting rod 9 passes through the connecting hole 48 and is positioned by a screw 40.

[0026] Preferably, when the core-pulling block 10 is rotated and extended into the elbow cavity 5 under the control of the core-pulling rotation drive mechanism 4, the straight core 49 is also extended into the elbow cavity 5 at the same time, and the end of the elbow forming module 11 abuts against the end of the straight core 49.

[0027] Preferably, the core-pulling rotation drive mechanism 4 further includes two pressure blocks 401, which press on the limiting steps 43 on both sides of the sliding block 41 respectively. The mounting groove 2 has fixed steps 16 on both sides, and the pressure blocks 401 are fixed on the fixed steps 16 by screws.

[0028] Preferably, the upper middle part of the lower template 1 is provided with a mold core mounting groove 17, the mold core 3 is installed in the mold core mounting groove 17, the mold core 3 is provided with a flow channel 31, the flow channel 31 is provided with a water outlet 32, and the water outlet 32 ​​is connected to the elbow cavity 5. There are two water outlets 32, which correspond to two elbow cavities 5 respectively, and two elbows can be formed at the same time.

[0029] Preferably, the lower template 1 has notches 18 on both sides, and the notches 18 are connected to the mold core mounting groove 17. The notches 18 facilitate the removal and installation of the mold core 3.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and structure of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bend-end rotary core-pulling device, comprising a lower template, characterized in that, The lower template has two corresponding mounting slots, and a mold core is provided between the two mounting slots. Each of the two mounting slots is equipped with a core-pulling rotation drive mechanism. The mold core has an elbow cavity and a core-pulling block mounting cavity, which are connected. The bottom of the core-pulling block mounting cavity is provided with an arc-shaped slide, and a slider is provided in the arc-shaped slide. The slider is connected to a connecting rod. One end of the connecting rod is connected to the core-pulling block, and the other end of the connecting rod is connected to the core-pulling rotation drive mechanism. The core-pulling rotation drive mechanism can control the core-pulling block to rotate and extend within the elbow cavity.

2. The elbow swivel core pull device of claim 1, wherein, One end of the core-pulling block is provided with a bend forming module and the other end is provided with a slot. One end of the connecting rod extends into the slot. The core-pulling block is provided with a pin hole. The pin passes through the pin hole and positions the connecting rod.

3. The elbow swivel core pull device of claim 2, wherein, The core-pulling rotation drive mechanism includes a sliding block and a cylinder mounting plate. The sliding block has limiting steps on both sides and a connecting groove at one end. The cylinder mounting plate has a cylinder and is mounted on the lower template. The piston rod end of the cylinder has a connecting block that connects to the connecting groove. The other end of the sliding block has a connecting plate with a connecting hole and a straight core-pulling mechanism. One end of the connecting rod passes through the connecting hole and is positioned by a screw.

4. The elbow rotary core-pulling device according to claim 3, characterized in that, When the core-pulling block is rotated and extended into the elbow cavity by the core-pulling rotation drive mechanism, the straight core is also extended into the elbow cavity at the same time, and the end of the elbow forming module abuts against the end of the straight core.

5. The elbow swivel core pull device of claim 4 wherein, The core-pulling rotation drive mechanism also includes two pressure blocks, which press on the limiting steps on both sides of the sliding block respectively. Fixed steps are provided on both sides of the mounting groove, and the pressure blocks are fixed on the fixed steps by screws.

6. The elbow swivel core pull device of claim 1 wherein, The upper middle part of the lower template is provided with a mold core mounting groove, the mold core is installed in the mold core mounting groove, the mold core is provided with a flow channel, the flow channel is provided with a water outlet, and the water outlet is connected to the elbow cavity.

7. The elbow swivel core pull device of claim 6 wherein, The lower template has notches on both sides, and the notches are connected to the mold core mounting groove.

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