CN110605819A - A linear action force rotating release structure - Google Patents

Abstract

The present invention discloses a linearly actuated force-bearing rotating release structure, which is installed on an injection mold, and includes a fixed sleeve, an axial through hole in the fixed sleeve, a movable shaft that can rotate and axially move relative to the fixed sleeve is arranged through the axial through hole, a spiral guide structure is arranged between the fixed sleeve and the movable shaft so that the movable shaft can rotate and axially move relative to the fixed sleeve when subjected to an axial force, a core part is arranged at one end of the movable shaft, when the movable shaft moves axially relative to the fixed sleeve, the core part is inserted into or withdraws from the cavity of the injection mold, a spiral structure is arranged on the outer wall of the core part, and the lead of the spiral structure is equal to the lead of the spiral guide structure. When the present invention is used on an injection mold, it can form a plastic product with a hole and a spiral structure on the hole wall at one time, with high work efficiency and good product quality.

Description

A linear action force rotating release structure

technical field

The invention relates to the technical field of injection molds, in particular to a linear-acting force-bearing rotating release structure.

Background technique

In the face of plastic parts of various shapes and structures in the industry, some plastic product parts have problems due to the performance requirements and the complex shape and structure of the plastic product parts themselves. The problem of inequity leads to the inability to open molds for plastic products for mold design, thus forming a technical bottleneck seal.

For example, for some plastic products with holes and a helical structure on the hole wall, the prior art generally adopts the following method to form. First, the main structure of the plastic product is injection molded, and a light hole is formed on the plastic product. Then the hole wall of the plastic product is processed, and a spiral structure such as a spiral groove or a spiral rib is processed on the hole wall. The whole production process needs two steps to complete, and the production efficiency is low.

The present invention solves the above problem that a plastic product part needs to be opened for mold design and targeted research and development of a linear motion force rotating release structure on the mold.

Contents of the invention

In view of this, the object of the present invention is to provide a linear action force rotating release structure, which can form a plastic product with a hole and a helical structure on the hole wall at one time when it is used on an injection mold.

The technical scheme that the present invention adopts for solving its technical problem is:

A linear-action force-bearing rotary release structure, which is installed on an injection mold, and includes a fixed sleeve, the fixed sleeve has an axial through hole, and the axial through hole is provided with a device that can rotate relative to the fixed sleeve. and an axially movable movable shaft, a helical guide structure is provided between the fixed sleeve and the movable shaft so that the movable shaft can move axially while rotating relative to the fixed sleeve when subjected to an axial force, and the movable shaft One end is provided with a core portion, and when the movable shaft moves axially relative to the fixed sleeve, the core portion is inserted into or withdrawn from the cavity of the injection mold, and the outer wall of the core portion is provided with a helical structure, and the The lead of the helical structure is equal to the lead of the said helical guide structure.

In an embodiment of the present invention, the spiral guiding structure includes a first spiral groove disposed on the outer wall of the movable shaft, a second spiral groove disposed on the inner wall of the fixed sleeve, and a second spiral groove disposed on the first For the ball between the helical groove and the second helical groove, the leads of the first helical groove and the second helical groove are equal.

In an embodiment of the present invention, the spiral guide structure further includes a spiral guide groove provided on the inner wall of the fixed sleeve, and a spiral guide groove arranged on the outer wall of the movable shaft and matched with the spiral guide groove. The helical guide rib, the lead of the helical guide rib, the helical guide groove, the first helical groove and the second helical groove are all equal.

In an embodiment of the present invention, the movable shaft has a clearance fit section that is clearance fit with the fixed sleeve, the spiral guide rib is arranged on the clearance fit section, and the spiral guide rib and the spiral guide The groove is a clearance fit, and the fixed sleeve is provided with an oil guide groove capable of passing lubricating oil into the gap between the clearance fit section and the fixed sleeve.

In an embodiment of the present invention, a limiting structure is provided between the movable shaft and the fixed sleeve to limit the maximum distance that the core protrudes from the fixed sleeve.

In an embodiment of the present invention, the movable shaft is a stepped shaft, the axial through hole is a stepped hole, and the position-limiting structure includes a first stepped surface located in the stepped hole and a first stepped surface located in the stepped hole. A second stepped surface on the stepped shaft and capable of abutting against the first stepped surface.

In an embodiment of the present invention, the movable shaft is fitted with a limiting disc capable of abutting against other components on the injection mold to limit the axial serial movement of the movable shaft.

In an embodiment of the present invention, the limiting plate is connected to the movable shaft through a pin.

In one embodiment of the present invention, the other end of the movable shaft opposite to the core part is sleeved with a sleeve that can rotate relative to the movable shaft, and the movable shaft is also sleeved with a shaft sleeve and a A wear-resistant sleeve between the movable shafts, the wear-resistant sleeve is closely matched with the movable shaft, and the wear-resistant sleeve is rotatably matched with the shaft sleeve.

In an embodiment of the present invention, the movable shaft includes a first shaft core and a second shaft core, one end of the first shaft core is detachably connected to one end of the second shaft core , the core portion is disposed on the other end of the first shaft core member, and the first spiral groove is disposed on the outer wall of the first shaft core member.

The beneficial effects of the present invention are: the present invention can form a hole on the plastic product through the core part, and form a spiral groove or rib structure on the hole wall. When the mold is opened, the movable axis is along the side of the spiral guide structure. Exiting the cavity while moving axially while rotating can ensure the integrity and quality of the product to meet the requirements, and complex structures can be molded with only one injection, which improves work efficiency.

Description of drawings

Fig. 1 is a sectional view of the present invention;

Fig. 2 is an explosion diagram of the present invention;

Fig. 3 is the sectional view of the explosion state of the present invention;

Fig. 4 is a partially enlarged view of part A in Fig. 2;

Fig. 5 is a partially enlarged view of part B in Fig. 3 .

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.

Referring to Fig. 1 to Fig. 5, the present invention proposes a linear action force-bearing rotary release structure, which is installed on an injection mold (not shown), and includes a fixed sleeve 1, which has an axial through hole 11. A movable shaft 2 that can rotate and move axially relative to the fixed sleeve 1 runs through the axial through hole 11. A spiral guide structure is provided between the fixed sleeve 1 and the movable shaft 2 so that when the movable shaft 2 is subjected to axial force It can move axially while rotating relative to the fixed sleeve 1. One end of the movable shaft 2 is provided with a core part 211. When the movable shaft 2 moves axially relative to the fixed sleeve 1, the core part 211 is inserted into or withdrawn from the cavity of the injection mold. The outer wall of the core part 211 is provided with a helical structure 212. The helical structure 212 is a helical rib or groove, which is selected according to the specific structure of the plastic product. The lead of the helical structure 212 is equal to the lead of the helical guide structure. .

The fixed sleeve 1 is provided with a mounting seat, and is installed on a template of the injection mold through the mounting seat, and the movable shaft 2 is installed on the other template of the injection mold, and the two templates can move relatively. Taking the movable shaft 2 installed on the movable template and the fixed sleeve 1 installed on the fixed template as an example, when the mold is closed, the core part 211 is located inside the cavity to form a hole on the plastic product, and on the wall of the hole Form spiral grooves or convex ribs; when the mold is opened, the movable template moves, and an axial force is applied to the movable shaft 2, so that the movable shaft 2 moves axially and rotates along the spiral guide structure, along the hole wall of the product The spiral grooves or ribs on the top exit the cavity, so that the movable shaft 2 can be separated from the product without destroying the structure of the product hole wall. In summary, the present invention can form a hole on the plastic product through the core part 211, and form a structure of a spiral groove or rib on the wall of the hole. Exiting the cavity while moving and rotating can ensure the integrity and quality of the product to meet the requirements, and complex structures can be molded with only one injection, which improves work efficiency.

The movable shaft 2 can be an integral structure, or a structure formed by connecting multiple parts. In this embodiment, the movable shaft 2 includes a first shaft core 21 and a second shaft core 22, and one end of the first shaft core 21 is detachably connected to one end of the second shaft core 22, such as by screw connection . The connection between the first core member 21 and the second core member 22 is located in the axial through hole 11 , and the core portion 211 is disposed on an end of the first core member 21 away from the second core member 22 . Since different products are suitable for different core parts 211 , the first core part 21 is set to be detachable, which is convenient for replacing the first core part 21 when changing products.

Referring to Fig. 3, the helical guide structure includes a first helical groove 221 arranged on the outer wall of the second shaft core member 22, a second helical groove 12 arranged on the inner wall of the fixed sleeve 1, and a second helical groove 12 arranged on the first helical groove 221 and the second helical groove 221. The leads of the ball 3 between the two helical grooves 12 , the first helical groove 221 , the second helical groove 12 and the helical structure 212 on the core part 211 are equal. When the movable shaft 2 is subjected to an axial force, the driving ball 3 rolls along the first helical groove 221 , and then drives the first core member 21 and the second core member 22 to perform combined motion of rotation and axial movement.

Further, the spiral guide structure also includes a spiral guide groove 13 arranged on the inner wall of the fixed sleeve 1, and a spiral guide rib 213 arranged on the outer wall of the first core member 21 and matched with the spiral guide groove 13, the spiral guide Leads of the rib 213 , the helical guide groove 13 , the first helical groove 221 and the second helical groove 12 are all equal. The first helical groove 221, the second helical groove 12, and the ball 3 arranged between them mainly play the role of torque transmission, and the added helical guide groove 13 and helical guide rib 213 can play a guiding role, and the movable shaft 2 can be lifted. Smoothness of movement and precision of movement. Of course, the above-mentioned helical guide rib 213 can also be provided on the second core member 22 , and the first helical groove 221 can be provided on the first core member 21 . When the lead of the helical structure 212 on the core part 211 is large enough, the above-mentioned first helical groove 221, second helical groove 12 and ball 3 can also be canceled, only through the cooperation of the helical guide groove 13 and the helical guide rib 213 To realize that the movable shaft 2 moves axially while rotating when subjected to axial force.

Optionally, the cross-sections of the helical guide rib 213 and the helical guide groove 13 are trapezoidal, and the cross-sections of the first helical groove 221 and the second helical groove 12 are approximately semicircular.

Further, the first shaft core 21 has a clearance fit section 214 that is clearance fit with the fixed sleeve 1, and the spiral guide rib 213 is arranged on the clearance fit section 214. The spiral guide rib 213 and the spiral guide groove 13 are clearance fit, and the fixed sleeve 1 An oil guide groove 14 that can pass lubricating oil into the gap between the clearance fit section 214 and the fixed sleeve 1 is provided on the top. Through the oil guide groove 14, lubricating oil can be passed into the above-mentioned gap and the spiral guide groove 13, thereby reducing frictional force. Further, a plurality of oil grooves 215 are provided on the outer side wall of the part between the loose fit section 214 and the core part 211, and each oil groove 215 is interlaced with each other. When the core part 211 exits the cavity, these oil grooves 215 move to the same position The matching positions of the spiral guide grooves 13 allow lubricating oil to enter these oil grooves 215 to play a lubricating role.

A limiting structure is provided between the movable shaft 2 and the fixed sleeve 1 to limit the maximum distance that the core part 211 protrudes from the fixed sleeve 1 . In the mold clamping state, the core part 211 is located in the mold cavity. At this time, the distance between the core part 211 protruding from the fixed sleeve 1 is the maximum distance. The above-mentioned maximum distance is limited by the limit structure, which can ensure that the core part 211 is in the mold clamping state. The position of the core part 211 meets the requirement.

Optionally, the diameter of the first shaft core member 21 is smaller than the diameter of the second shaft core member 22 so that the movable shaft 2 is a stepped shaft, the axial through hole 11 is a stepped hole, and the limiting structure includes a first shaft located in the stepped hole. The stepped surface and the second stepped surface located on the stepped axis and capable of abutting against the first stepped surface.

Referring to FIG. 1 , the second core member 22 is fitted with a limiting disc 41 that can abut against other parts on the injection mold to limit the axial serial movement of the movable shaft 2 , and the limiting disc 41 and the movable shaft 2 pass through a pin 42 connect. A locking ball screw 43 is also connected between the limiting disc 41 and the second core member 22 to play a positioning role when the movable shaft 2 is installed.

Further, the tail end of the second core member 22, that is, the other end of the movable shaft 2 opposite to the core part 211 is sleeved with a sleeve 5 that can rotate relative to the second core member 22, and the second core member 22 is also sleeved with a wear-resistant sleeve 6 between the shaft sleeve 5 and the second shaft core 22, the wear-resistant sleeve 6 is closely matched with the second shaft core 22, and the wear-resistant sleeve 6 is in rotation with the shaft sleeve 5. The shaft sleeve 5 is fixedly installed on a template, and when the movable shaft 2 rotates while moving axially, the template, the shaft sleeve 5 and the movable shaft 2 move axially together, and the shaft sleeve 5 does not rotate, and guides and supports the movable shaft 2 The effect of; wear-resistant sleeve 6 then plays the effect of increasing wear resistance.

Referring to FIG. 1 , the end surface of the tail end of the second shaft core member 22 is also connected with an adjusting wear block 7 by a screw, so as to play the role of auxiliary connection and fixed fit.

The above are only preferred implementation modes of the present invention, as long as the technical solutions to achieve the object of the present invention by basically the same means are within the protection scope of the present invention.

Claims (10)

1. A linear action force-rotating release structure, which is installed on an injection mold, is characterized in that it includes a fixed sleeve (1), and an axial through hole (11) is provided in the fixed sleeve (1). A movable shaft (2) that can rotate and move axially relative to the fixed sleeve (1) runs through the axial through hole (11), and a helical guide is provided between the fixed sleeve (1) and the movable shaft (2). The structure is such that the movable shaft (2) can move axially while rotating relative to the fixed sleeve (1) when subjected to an axial force, and one end of the movable shaft (2) is provided with a core part (211), the When the movable shaft (2) moves axially relative to the fixed sleeve (1), the core part (211) inserts or withdraws from the cavity of the injection mold, and the outer wall of the core part (211) is provided with a helical structure ( 212), the lead of the helical structure (212) is equal to the lead of the helical guide structure. 2. A linear-acting force-bearing rotating release structure according to claim 1, characterized in that, said helical guide structure includes a first helical groove ( 221), the second helical groove (12) arranged on the inner wall of the fixed sleeve (1) and the ball (3) arranged between the first helical groove (221) and the second helical groove (12), the second The lead of the first helical groove (221) is equal to that of the second helical groove (12). 3. A linear-acting force-bearing rotating release structure according to claim 2, characterized in that, the spiral guide structure further includes a spiral guide groove ( 13), and the spiral guide rib (213) that is arranged on the outer wall of the movable shaft (2) and cooperates with the spiral guide groove (13), the spiral guide rib (213), the spiral guide groove (13) ), the leads of the first helical groove (221) and the second helical groove (12) are all equal. 4. A linear-acting force-bearing rotary release structure according to claim 3, characterized in that, the movable shaft (2) has a clearance fit section that is clearance fit with the fixed sleeve (1), so that The said spiral guide rib (213) is arranged on the said gap fit section, the said spiral guide rib (213) and the spiral guide groove (13) are clearance fit, and the described fixing sleeve (1) is provided with a An oil guide groove (14) for lubricating oil is passed into the gap between the mating section and the fixed sleeve (1). 5. A linear-acting force-bearing rotary release structure according to claim 1, characterized in that a limiting structure is set between the movable shaft (2) and the fixed sleeve (1) to limit the shape The core (211) protrudes beyond the maximum distance of the fixing sleeve (1). 6. A linear-acting force-bearing rotary release structure according to claim 5, characterized in that, the movable shaft (2) is a stepped shaft, and the axial through hole (11) is a stepped hole , the limiting structure includes a first stepped surface located in the stepped hole and a second stepped surface located on the stepped shaft and capable of abutting against the first stepped surface. 7. A linear action force-bearing rotary release structure according to claim 1, characterized in that, the movable shaft (2) is covered with a device capable of abutting against other parts on the injection mold to limit the The limit disc (41) that the movable shaft (2) axially moves in series. 8 . The linear-action force-bearing rotary release structure according to claim 7 , characterized in that, the limiting plate ( 41 ) is connected to the movable shaft ( 2 ) through a pin ( 42 ). 9. A linear-acting force-bearing rotary release structure according to claim 1, characterized in that, the other end of the movable shaft (2) opposite to the core part (211) is sleeved with a The shaft sleeve (5) that the movable shaft (2) rotates, and the wear-resistant sleeve (6) between the shaft sleeve (5) and the movable shaft (2) is also sleeved on the movable shaft (2). The wear-resistant sleeve (6) is closely matched with the movable shaft (2), and the wear-resistant sleeve (6) is rotationally matched with the shaft sleeve (5). 10. A linear-action force-bearing rotary release structure according to claim 2, characterized in that, the movable shaft (2) includes a first shaft core (21) and a second shaft core (22 ), one end of the first core part (21) is detachably connected to one end of the second core part (22), and the core part (211) is arranged on the first core part At the other end of (21), the first helical groove (221) is provided on the outer wall of the first shaft core (21).