A travel distance mechanism and injection mold

Abstract

The present application relates to a travel spacing mechanism and an injection mold, which relates to the technical field of injection molds, and includes a spacing pull plate and a bolt, wherein the bolt is fixed on the mold, and the spacing pull plate is provided with a slide groove corresponding to the bolt; and also includes a pin, wherein both the pin and the bolt pass through the slide groove and are slidably arranged in the slide groove, and the pin is used to share the force of the bolt when the spacing pull plate collides with the bolt. When the travel spacing mechanism of the present application is working, the design of adding a pin is utilized, and since the pin is usually a hollow cylindrical design, the head and the tail are an expansion area and a thick fixing area respectively, this design is conducive to forming a good clamping force during installation, and the pin is usually made of high-strength metal material, has high tensile strength and hardness, and can withstand large tensile and shear forces.

Description

Technical Field

[0001] The present application relates to the technical field of injection molds, and in particular to a stroke spacing mechanism and an injection mold. Background Art

[0002] A mold is a variety of molds and tools used in industrial production to obtain the desired products by injection molding, blow molding, extrusion, die-casting or forging, smelting, stamping and other methods. The mold has a specific contour or inner cavity shape, and the inner cavity shape can be used to make the blank obtain the corresponding three-dimensional shape.

[0003] During the mold opening process after the mold is injection molded, due to limitations such as complex structure of the product, multiple mold opening actions need to be completed on the mold frame, and the mold opening distance needs to be accurately fixed according to the product limitations in order to smoothly remove the product and complete the entire production process; in this process, it is necessary to limit the travel distance of the mold when opening, which is currently mainly achieved through a fixed-distance pull plate assembly. The existing fixed-distance pull plate assembly mainly includes a pull plate and a screw. The pull plate is provided with a sliding hole. The screw passes through the sliding hole and is fixed on the mold. When the mold is opened, the movable mold of the mold moves and separates from the fixed mold, driving the screw to move until it moves to the bottom of the sliding hole and contacts, and stops moving the movable mold, thereby making the mold opening stroke between the fixed mold and the movable mold fixed.

[0004] In the actual mold opening process, usually multiple mold opening actions are required between the fixed mold and the movable mold to separate and remove the product, which means that the pull plate needs to collide with the screws multiple times. The load of the screws is usually poor. The screws are prone to mechanical fatigue damage after long-term use, and then deform. After deformation, the screws damage the threaded holes on the mold for installing the distance bolts, thus causing the screws to loosen or be damaged, thereby affecting the service life of the distance pull plate assembly. Utility Model Content

[0005] In order to improve the problem that loose or damaged screws affect the service life of the spacing pull plate assembly, the present application provides a travel spacing mechanism and an injection mold.

[0006] The present application provides a travel distance mechanism and an injection mold adopting the following technical solutions:

[0007] A stroke spacing mechanism is used to control the stroke distance of mold opening, the stroke spacing mechanism includes a spacing pull plate and a bolt, the bolt is fixed on the mold, and the spacing pull plate is provided with a slide groove corresponding to the bolt; it also includes a pin, the pin and the bolt both pass through the slide groove and are slidably set in the slide groove, the pin is used to share the force of the bolt when the spacing pull plate collides with the bolt; it also includes a slider, the slider slides and contacts in the slide groove, the bolt and the pin pass through the slider and are fixed to the mold.

[0008] By adopting the above technical solution, when the mold is opened, the distance-fixing pull plate needs to collide with the bolt during the distance-fixing process of the travel distance-fixing mechanism. At this time, the design of the additional slider and the bolts and pins passing through the slider and then fixed to the mold can make the connection between the pins, bolts and the mold more stable and reduce the force. At the same time, it can also reduce the impact of external impact on the pins and bolts during the movement of the distance-fixing pull plate, and reduce the loss caused by friction. In this process, the design of adding pins is used. The pins are usually made of high-strength metal materials with high tensile strength and hardness, and can withstand large tensile and shear forces. During the installation process, the pins are installed in the workpiece by tensioning or impact. Compared with ordinary screws, the installation method is more stable and provides more reliable bearing support, so that the pins have good load-bearing capacity, can share the force of the bolts when the distance-fixing pull plate collides with the bolts, and reduce the impact of external impact on the bolts during the movement of the distance-fixing pull plate, thereby reducing the mechanical fatigue damage of the bolts after long-term use, and reducing the possibility of deformation of the bolts, thereby reducing the occurrence of bolt loosening or damage, and thus improving the overall service life of the travel distance-fixing mechanism.

[0009] In a specific implementation scheme, the distance between the pin and the bolt is set to S, the diameter of the pin is set to R, and R / 2<S<2R.

[0010] By adopting the above technical solution, the spacing between the pin and the bolt is designed to be between 1 / 2 and 2 times the diameter of the pin, so that the pin can bear part of the force to a certain extent, which helps to disperse and reduce the load on the bolt, thereby protecting the bolt and improving its service life, thereby improving the service life of the entire travel spacing mechanism.

[0011] In a specific possible implementation manner, the pin is a hollow cylindrical structure, and the head and the tail are the expansion area and the fixing area respectively.

[0012] By adopting the above technical solution, the pin adopts a hollow cylindrical design, and the head and tail are respectively an expansion area and a thick fixing area. This design is conducive to forming a good clamping force when the pin is installed, thereby improving the bearing capacity of the pin.

[0013] In a specific possible implementation scheme, it also includes a slider, the slider slides and abuts in the slide groove, and the bolt and the pin pass through the slider and are then fixed on the mold.

[0014] By adopting the above technical solution, by using an additional slider and a design in which bolts and pins pass through the slider and are fixed to the mold, the connection between the pins, bolts and the mold can be made more stable and the stress can be reduced. At the same time, the impact of external impact on the pins and bolts during the movement of the fixed-distance pull plate can be reduced, and the loss caused by friction can be reduced, thereby improving the stability and durability of the entire travel and distance mechanism, and further improving the overall service life of the travel and distance mechanism.

[0015] In a specific possible implementation manner, the sliding blocks are each provided with a clamping portion, and the clamping portion is clamped on a side of the distance pulling plate away from the mold.

[0016] By adopting the above technical solution, when the travel and spacing mechanism is working, the design of the locking part on the slider makes the movement of the slider in the spacing pull plate slide groove more stable, effectively reducing the friction and shaking of the slider in the slide groove, and improving the overall movement stability; it can also help the slider to maintain a more accurate and repetitive movement trajectory on the spacing pull plate; it can also enhance the connection strength between the slider and the spacing pull plate, helping to extend the service life of the travel and spacing mechanism.

[0017] In a specific possible implementation scheme, the contact surface between the sliding block and the sliding groove is set as an arc surface.

[0018] By adopting the above technical solution and using the design that the contact surface between the slider and the slide groove is set as an arc surface, the local stress concentration on the contact surface between the slider and the slide groove can be reduced. Compared with the plane contact, the arc surface will disperse the stress and can also increase the contact area between the slider and the slide groove, disperse the friction force, thereby reducing the risk of wear and damage and improving the wear resistance and service life of the slider.

[0019] In a specific possible implementation manner, a shock-absorbing pad is provided on the arc surface of the slide groove or the slide block.

[0020] By adopting the above technical solution and utilizing the design of the shock-absorbing pad on the arc surface, the shock-absorbing pad can play a buffering and protective role, reduce the impact and friction between the slider and the slide groove, thereby reducing the wear and damage of the parts, and further increasing the service life of the entire travel and spacing mechanism.

[0021] In a specific possible implementation scheme, a pad is further included. The pad is arranged corresponding to the slider, the pad is located between the slider and the mold, and the pad is in contact with the slider, the fixed distance pull plate and the mold.

[0022] By adopting the above technical solution and utilizing the setting of the pad, the pad is placed between the slider and the mold to play a filling and supporting role, so that the fixed-distance pull plate can remain stable during the sliding process and not directly contact the mold, thereby ensuring the smooth movement of the fixed-distance pull plate; and can effectively reduce the friction and wear during the movement of the fixed-distance pull plate, and at the same time can better control the position and movement mode of the fixed-distance pull plate.

[0023] In a specific implementation manner, a locking washer is further included, and the locking washer is arranged between the bolt and the slider.

[0024] By adopting the above technical solution, the locking washer can provide additional friction, so that the bolt is not easy to loosen under vibration or other external forces, the friction coefficient between the slider and the bolt is increased, the loosening phenomenon is prevented, and the reliable connection between the slider and the bolt is ensured, thereby ensuring the reliable connection between the bolt, the slider and the mold, and further ensuring the normal operation of the entire travel spacing mechanism.

[0025] An injection mold comprises the stroke spacing mechanism as described above, wherein a plurality of the stroke spacing mechanisms are arranged on the injection mold.

[0026] By adopting the above technical solution, the travel and spacing mechanism is used to control the moving distance of the active parts in the injection mold to ensure that the size and quality of the product during the injection molding process meet the requirements. Installing multiple travel and spacing mechanisms on the injection mold can improve the accuracy and stability of mold opening, and can also better control the movement trajectory and position of the mold; configuring multiple travel and spacing mechanisms can achieve more complex mold design and injection molding process, meet the production needs of different products, improve production efficiency, reduce production costs, and ensure the quality and consistency of injection molded products.

[0027] In a specific possible implementation manner, a gap is left between the distance pull plate and the injection mold.

[0028] By adopting the above technical solution and reasonably setting the gap between the spacing pull plate and the injection mold, direct contact between them can be avoided, wear and damage can be reduced, and production efficiency and product quality can be improved; at the same time, the maintenance and care of the injection mold can be simplified, the service life of the injection mold can be extended, and production costs can be reduced.

[0029] In summary, the present application includes at least one of the following beneficial technical effects:

[0030] 1. When the travel and spacing mechanism of the present application is working, the design of adding a pin is utilized. Since the pin is usually designed with a hollow cylinder, the head and the tail are respectively an expansion area and a thick fixing area. This design is conducive to forming a good clamping force during installation. The pin is usually made of high-strength metal material, has high tensile strength and hardness, and can withstand large tensile and shear forces. During the installation process, the pin is installed into the workpiece by tensioning or impacting. Compared with ordinary screws, its installation method is more stable and provides more reliable bearing support, so that the pin has a good load-bearing capacity, can share the force of the bolt when the distance plate collides with the bolt, and reduce the impact of external impact on the bolt during the movement of the distance plate, thereby reducing the mechanical fatigue damage of the bolt after long-term use, and reducing the possibility of deformation of the bolt, thereby reducing the occurrence of bolt loosening or damage, and thus can improve the overall service life of the travel and spacing mechanism;

[0031] 2. The present application utilizes an additional slider and a design in which both the bolts and the pins pass through the slider and are fixed to the mold, thereby making the connection between the pins, bolts and the mold more stable and reducing the stress. At the same time, it can also reduce the impact of external impact on the pins and bolts during the movement of the fixed-distance pull plate, and reduce the loss caused by friction, thereby improving the stability and durability of the entire travel and distance mechanism, and further improving the overall service life of the travel and distance mechanism.

[0032] 3. This application utilizes a travel and spacing mechanism to control the moving distance of the moving parts in the injection mold to ensure that the size and quality of the product during the injection molding process meet the requirements. Installing multiple travel and spacing mechanisms on the injection mold can improve the accuracy and stability of mold opening, and can also better control the movement trajectory and position of the mold; configuring multiple travel and spacing mechanisms can achieve more complex mold design and injection molding process, meet the production needs of different products, improve production efficiency, reduce production costs, and ensure the quality and consistency of injection molded products. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of the travel spacing mechanism in Example 1 of the present application.

[0034] Figure 2 It is a schematic diagram used to show the positional relationship between the bolts, pins, sliders and the fixed-distance pull plate after the stroke and fixed-distance mechanism has been opened once.

[0035] Figure 3 It is a schematic diagram used to show the positional relationship between the bolts, pins, sliders and the fixed distance pull plate after the secondary mold opening of the travel and fixed distance mechanism.

[0036] Figure 4 It is a schematic diagram used to show the positional relationship of the pad, slider and fixed distance pull plate.

[0037] Figure 5 It is a structural schematic diagram of the injection mold in Example 1 of the present application.

[0038] Figure 6 It is a structural schematic diagram of the travel spacing mechanism in Example 2 of the present application.

[0039] Figure 7 It is a structural schematic diagram of the travel spacing mechanism in Example 3 of the present application.

[0040] Explanation of the accompanying drawings: 1. stroke spacing mechanism; 2. spacing pull plate; 21. slide groove; 3. bolt; 4. pin; 5. slider; 51. snap-fitting part; 6. shock-absorbing pad; 7. locking washer; 8. cushion block; 9. injection mold; 91. male mold; 92. female mold; 10. arc surface. DETAILED DESCRIPTION

[0041] The following is combined with Figure 1-7 This application is described in further detail.

[0042] Example 1

[0043] Please refer to Figure 1-3 The embodiment of the present application discloses a travel distance mechanism for controlling the travel distance of mold opening. In this embodiment, the mold includes a fixed mold component and a movable mold component. The travel distance mechanism 1 is used to control the moving distance of the movable mold component, thereby controlling the travel distance of the mold opening to ensure that the size and quality of the product after demolding meet the requirements;

[0044] The travel distance mechanism 1 includes a distance pull plate 2 and bolts 3. In this embodiment, the travel distance mechanism 1 includes a distance pull plate 2 and two bolts 3. The two bolts 3 are respectively fixed to the fixed mold assembly and the movable mold assembly. The distance pull plate 2 is provided with two slide grooves 21 corresponding to the bolts 3. In this embodiment, the two slide grooves 21 are arranged along the length direction of the distance pull plate 2. Before the mold is opened, the two bolts 3 are arranged close to each other, and after the mold is opened, the two bolts 3 are arranged away from each other.

[0045] The travel spacing mechanism 1 also includes a pin 4. In the present embodiment, there are two pins 4, and the two pins 4 are respectively fixed on the fixed mold assembly and the movable mold assembly. In the present embodiment, the bolt 3 is threadedly connected and fixed on the mold. The pin 4 includes but is not limited to being fixed on the mold by knocking or pressing; the pin 4 and the bolt 3 are arranged one by one and the pin 4 and the bolt 3 are arranged close to each other. The pin 4 and the bolt 3 both pass through the slide groove 21 and are slidably arranged in the slide groove 21. The pin 4 is used to share the force of the bolt 3 when the spacing pull plate 2 collides with the bolt 3. In the present embodiment, the load-bearing capacity of the pin 4 High load-bearing capacity. The pin 4 is made of high-strength metal materials, including but not limited to carbon steel and stainless steel, with high tensile strength and hardness, and can withstand large tensile and shear forces. The pin 4 adopts a hollow cylindrical design, and the head and tail are respectively an expansion area and a thick fixed area. This design is conducive to forming a good clamping force during installation. During the installation process, the pin 4 is installed on the mold by tensioning or impacting. Compared with ordinary screws, its installation method is more stable and provides more reliable load-bearing support, so that the pin 4 has a good load-bearing capacity;

[0046] The distance between the pin 4 and the bolt 3 is set to S, and the diameter of the pin 4 is set to R, where R / 2<S<2R; the distance between the pin 4 and the bolt 3 is designed to be between 1 / 2 and 2 times the diameter of the pin 4, so that the pin 4 can bear part of the force to a certain extent, which helps to disperse and reduce the load of the bolt 3, thereby protecting the bolt 3 and improving its service life, thereby improving the service life of the entire travel spacing mechanism 1;

[0047] The travel and spacing mechanism 1 further includes a slider 5. In this embodiment, two sliders 5 are provided to correspond to the bolts 3 one by one. The sliders 5 slide and abut against the slide grooves 21. The bolts 3 and the pins 4 pass through the sliders 5 and are then fixed to the fixed mold assembly or the movable mold assembly of the mold.

[0048] When the stroke and spacing mechanism 1 is working, the movable mold assembly is driven to move and drive a group of bolts 3, pins 4, and sliders 5 located below to move together in the slide groove 21, along Figure 1 Move in the direction of the dotted line (refer to Figure 1 ); When the group of bolts 3, pins 4, and sliders 5 move to the bottom of the lower slide 21, the group of bolts 3, pins 4, and sliders 5 located below will collide with the fixed distance pull plate 2, and a fixed distance mold opening work is completed (refer to Figure 2 ); continue to drive the movable mold assembly to move, at this time, a group of bolts 3, pins 4, and sliders 5 located at the bottom will drive the fixed distance pull plate 2 to move together, so that the upper slide 21 will move along the upper slider 5 wall. When the top of the upper slide 21 moves to the upper slider 5 position, the group of bolts 3, pins 4, and sliders 5 located at the top will collide with the fixed distance pull plate 2, and the secondary fixed distance mold opening work is completed (refer to Figure 3 );

[0049] In this process, the design that the slider 5 and the bolts 3 and the pins 4 all pass through the slider 5 and are fixed to the mold can make the connection between the pins 4, the bolts 3 and the mold more stable and reduce the stress. When the travel spacing mechanism 1 is working, the movable mold assembly is driven to move to drive the bolts 3, the pins 4 and the slider 5 to move together. In this process, the setting of the slider 5 makes the spacing pull plate 2 directly collide with the slider 5, and not directly collide with the bolts 3, thereby reducing the impact of external impact on the pins 4 and the bolts 3 during the movement of the spacing pull plate 2, and reducing the loss caused by friction, thereby improving the stability and durability of the entire travel spacing mechanism 1, and improving the overall service life of the travel spacing mechanism 1;

[0050] And in the process that the distance pull plate 2 collides with the bolt 3, the pin 4 and the slider 5, the design of adding the pin 4 is utilized, and the pin 4 has good load-bearing capacity, and can share the force of the bolt 3 when the distance pull plate 2 collides with the bolt 3, and reduce the influence of the external impact on the bolt 3 during the movement of the distance pull plate 2, thereby reducing the mechanical fatigue damage caused by the bolt 3 after long-term use, and reducing the possibility of deformation of the bolt 3, thereby reducing the occurrence of loosening or damage of the bolt 3, and thus can improve the overall service life of the travel distance mechanism 1; and when the mold is opened, through the design of the two slide grooves 21 on the distance pull plate 2 and the design of the two sliders 5, the bolt 3 and the pin 4, the travel distance mechanism 1 of the present application can meet the use requirements of the mold that needs multiple mold opening operations.

[0051] Reference Figure 3 and Figure 4 The contact surfaces of the slider 5 and the slide groove 21 are both set as arc surfaces 10, and the slider 5 and the arc surfaces 10 of the slide groove 21 are arranged in a close fit; thereby, the local stress concentration on the contact surface between the slider 5 and the slide groove 21 can be reduced. Compared with the plane contact, the arc surface 10 can disperse the stress, and can also increase the contact area between the slider 5 and the slide groove 21, disperse the friction force, thereby reducing the risk of wear and damage, and improving the wear resistance and service life of the slider 5.

[0052] Both sliders 5 are provided with a snap-fitting portion 51, which is snapped on the side of the spacing pull plate 2 away from the mold; the snap-fitting portion 51 arranged on the slider 5 makes the movement of the slider 5 in the slide groove 21 of the spacing pull plate 2 more stable, effectively reduces the friction and shaking of the slider 5 in the slide groove 21, improves the overall movement stability, and can help the slider 5 maintain a more accurate and repetitive movement trajectory on the spacing pull plate 2; it can also enhance the connection strength between the slider 5 and the spacing pull plate 2, and help extend the service life of the travel spacing mechanism 1.

[0053] The travel spacing mechanism 1 also includes a pad 8. In the present embodiment, two pads 8 are provided. The pads 8 are arranged one-to-one with the slider 5. The pads 8 are located between the slider 5 and the mold. The pads 8 are in contact with the slider 5, the spacing pull plate 2 and the mold. The pads 8 allow a certain distance to exist between the spacing pull plate 2 and the mold. The bolts 3 and the pins 4 pass through the slider 5 and the pads 8 in sequence and are then fixed on the mold. The pads 8 are placed between the slider 5 and the mold to play a filling and supporting role, so that the spacing pull plate 2 can remain stable during the sliding process and not in direct contact with the mold, thereby ensuring that the spacing pull plate 2 moves smoothly, and can effectively reduce the friction and wear during the movement of the spacing pull plate 2, and at the same time can also better control the position and movement mode of the spacing pull plate 2.

[0054] Reference Figure 5 The present application also provides an injection mold, including the stroke spacing mechanism 1 as described above. In the present embodiment, the injection mold 9 includes a male mold 91 and a female mold 92. The injection mold 9 is provided with a plurality of stroke spacing mechanisms 1. In the present embodiment, the injection mold 9 is provided with four stroke spacing mechanisms 1. The spacing pull plates 2 of the four stroke spacing mechanisms 1 are all vertically arranged, and the four stroke spacing mechanisms 1 are symmetrically arranged; the stroke spacing mechanism 1 is used to control the moving distance of the male mold 91 in the mold to ensure that the size and quality of the product meet the requirements during the injection molding process. Installing multiple stacked stroke spacing mechanisms 1 on the injection mold 9 can improve the demoulding accuracy and stability, and can also better control the movement trajectory and position of the male mold 91; and configuring multiple stroke spacing mechanisms 1 can realize more complex mold design and injection molding process, meet the production requirements of different products, improve production efficiency, reduce production costs, and ensure the quality and consistency of injection molded products.

[0055] In this embodiment, one group of bolts 3, pins 4, and sliders 5 of each stroke spacing mechanism 1 is fixed on the male mold 91, and the other group of bolts 3, pins 4, and sliders 5 are fixed on the female mold 92; before demoulding, the male mold 91 abuts against the female mold 92, at which time, the bolts 3, pins 4, and sliders 5 on the female mold 92 are located at the bottom of the upper slide groove 21 thereof, and the bolts 3, pins 4, and sliders 5 on the male mold 91 are located at the top of the upper slide groove 21 thereof, and the two groups of bolts 3, pins 4, and sliders 5 are arranged close to each other;

[0056] During the actual mold opening process, the male mold 91 is driven to move in the vertical direction toward the side away from the female mold 92. When the slider 5 on the male mold 91 collides with the bottom end of the slide groove 21 on the distance pull plate 2 on the side of the male mold 91, the first demolding of the injection mold 9 is completed, and the male mold 91 is continued to be driven to move. At this time, since the slider 5 collides with the bottom end of the slide groove 21 on the side of the male mold 91, the slider 5 will drive the distance pull plate 2 to move, thereby making the slide groove 21 on the distance pull plate 2 on the side of the female mold 92 move together. When the top of the slide groove 21 on the distance pull plate 2 on the side of the female mold 92 collides with the slider 5 on the female mold 92, the movement is stopped to complete the secondary demolding of the injection mold 9, thereby completing the demolding of the entire injection mold 9.

[0057] A gap is left between the distance pull plate 2 and the injection mold 9. In the present embodiment, a gap is left between the distance pull plate 2 and the male mold 91 and the female mold 92. The gap between the distance pull plate 2 and the male mold 91 and the female mold 92 is realized by a pad 8 arranged corresponding to them. By reasonably setting the gap between the distance pull plate 2 and the injection mold 9, direct contact between them can be avoided, wear and damage can be reduced, and production efficiency and product quality can be improved. At the same time, the maintenance and maintenance of the injection mold 9 can be simplified, the service life of the injection mold 9 can be extended, and the production cost can be reduced.

[0058] The implementation principle of Example 1 is as follows: the travel distance mechanism 1 of the present application is mainly configured by the pin 4 and the slider 5, so that when the distance pull plate 2 collides with the bolt 3, the distance pull plate 2 does not directly collide with the bolt 3, and the force of the bolt 3 is shared, thereby reducing the occurrence of loosening or damage of the bolt 3, thereby achieving the effect of increasing the service life;

[0059] When installing the travel spacing mechanism 1, first place the two cushion blocks 8 on the male mold 91 and the female mold 92 of the injection mold 9 respectively, then place the upper spacing pull plate 2, so that the spacing pull plate 2 abuts against the cushion blocks 8, and then insert the two sliders 5 into the slide grooves 21 on the spacing pull plate 2 respectively, so that the sliders 5 abut against the cushion blocks 8 and abut against the slide grooves 21. At this time, the slider 5 on the female mold 92 abuts against the bottom setting of its slide groove 21, and the slider 5 on the male mold 91 abuts against the top setting of its slide groove 21. Then, the bolts 3 are passed through the slider 5, the cushion blocks 8, the male mold 91 or the female mold 92 in turn and threadedly connected. The pins 4 are passed through the slider 5, the cushion blocks 8, the male mold 91 or the female mold 92 in turn and tapped and pressed to tighten, and the installation of the travel spacing mechanism 1 is completed.

[0060] During the actual mold opening process, the male mold 91 is driven to move in the vertical direction toward the side away from the female mold 92. When the slider 5 on the male mold 91 collides with the bottom end of the slide groove 21 on the distance pull plate 2 on the male mold 91 side, the first demoulding work of the injection mold 9 is completed; the male mold 91 is continued to be driven to move. At this time, since the slider 5 collides with the bottom end of the slide groove 21 on the distance pull plate 2 on the male mold 91 side, the slider 5 will drive the distance pull plate 2 to move, thereby making the slide groove 21 on the distance pull plate 2 on the female mold 92 side move together. When the top of the slide groove 21 on the distance pull plate 2 on the female mold 92 side collides with the slider 5 on the female mold 92, the movement is stopped to complete the secondary demoulding of the injection mold 9, thereby completing the demoulding work of the entire injection mold 9;

[0061] During this process, the setting of the slider 5 is utilized so that the distance pull plate 2 can collide with the slider 5 directly instead of the bolt 3 directly, thereby reducing the influence of external impact on the bolt 3 during the movement of the distance pull plate 2, thereby achieving the effect of protecting the bolt 3; and the design of adding the pin 4 has good load-bearing capacity, and can share the force of the bolt 3 when the distance pull plate 2 collides with the bolt 3, thereby reducing the influence of external impact on the bolt 3 during the movement of the distance pull plate 2, thereby reducing the mechanical fatigue damage caused by the bolt 3 after long-term use, and reducing the possibility of deformation of the bolt 3, thereby reducing the occurrence of loosening or damage of the bolt 3, and thus can improve the overall service life of the travel distance mechanism 1.

[0062] Example 2

[0063] Reference Figure 6 The difference between this embodiment and embodiment 1 is that a shock-absorbing pad 6 is provided on the arc surface 10 of the slide groove 21 or the slider 5. In this embodiment, the shock-absorbing pad 6 is provided on the arc surface 10 of the slide groove 21 and is arranged in close contact with the arc surface 10. In this embodiment, the shock-absorbing pad 6 includes but is not limited to a rubber pad; the shock-absorbing pad 6 can play a buffering and protective role, reduce the impact and friction between the slider 5 and the slide groove 21, thereby reducing the wear and damage of the parts, and further improving the service life of the entire travel spacing mechanism 1.

[0064] Example 3

[0065] Reference Figure 7The difference between this embodiment and embodiment 1 is that it also includes a locking washer 7, which is arranged between the bolt 3 and the slider 5. The bolt 3 passes through the locking washer 7, the slider 5, and the pad 8 in sequence and is then fixed on the mold; the locking washer 7 can provide additional friction for the bolt 3, so that the bolt 3 is not easy to loosen under vibration or other external forces, increase the friction coefficient between the slider 5 and the bolt 3, prevent the occurrence of loosening, ensure the reliable connection between the slider 5 and the bolt 3, thereby ensuring the reliable connection between the bolt 3, the slider 5 and the mold, and then ensure the normal operation of the entire travel spacing mechanism 1.

[0066] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A travel distance mechanism for controlling the travel distance of a mold opening, characterized in that: It includes a distance pull plate (2) and a bolt (3), wherein the bolt (3) is fixed on the mold, and a slide groove (21) corresponding to the bolt (3) is provided on the distance pull plate (2); it also includes a pin (4), wherein the pin (4) and the bolt (3) both pass through the slide groove (21) and are both slidably arranged in the slide groove (21), and the pin (4) is used to share the force of the bolt (3) when the distance pull plate (2) collides with the bolt (3); it also includes a slider (5), wherein the slider (5) slides and contacts in the slide groove (21), and the bolt (3) and the pin (4) pass through the slider (5) and are then fixed on the mold.

2. The travel distance mechanism according to claim 1, characterized in that: The distance between the pin (4) and the bolt (3) is set to S, the diameter of the pin (4) is set to R, and R / 2<S<2R.

3. The travel distance mechanism according to claim 1, characterized in that: The pin (4) is a hollow cylindrical structure, and the head and tail are respectively an expansion area and a fixing area.

4. The travel distance mechanism according to claim 1, characterized in that: The sliding blocks (5) are each provided with a clamping portion (51), and the clamping portion (51) is clamped on a side of the spacing pull plate (2) away from the mold.

5. The travel distance mechanism according to claim 1, characterized in that: The contact surface between the sliding block (5) and the sliding groove (21) is set as an arc surface (10).

6. The travel distance mechanism according to claim 5, characterized in that: A shock-absorbing pad (6) is provided on the arc surface (10) of the slide groove (21) or the slider (5).

7. The travel distance mechanism according to claim 1, characterized in that: It also includes a cushion block (8), which is arranged corresponding to the slider (5), and is located between the slider (5) and the mold. The cushion block (8) is in contact with the slider (5), the fixed-distance pull plate (2) and the mold.

8. The travel distance mechanism according to claim 1, characterized in that: It also includes a locking washer (7), which is arranged between the bolt (3) and the slider (5).

9. An injection mold, comprising the stroke distance mechanism according to any one of claims 1 to 8, characterized in that: The injection mold (9) is provided with a plurality of travel spacing mechanisms (1).

10. The injection mold according to claim 9, characterized in that: A gap is left between the distance pulling plate (2) and the injection mold (9).

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