Abstract:
Angle pin structure for ease of male and female mold disengagements includes an angle pin member, a sliding block, and an elastic unit between the angle pin member and the sliding block. The angle pin member includes a base, and the elastic unit is received in the base. When the sliding block moves close to the angle pin member on assembly of a male and female molding device, the elastic unit is elastically compressed between the sliding block and the angle pin member. When the molding device is to be broken open and the sliding block moved away from the angle pin member, the elastic force helps to push the sliding block away.

Description:
FIELD 
       [0001]    The present disclosure relates to injection molds, and particularly to an angle pin structure and an injection mold having the angle pin structure. 
       BACKGROUND 
       [0002]    An injection mold is used for injection molding products. After a product is formed, injection molding usually departs its male die and female die along a direction perpendicular to a separating surface. If the molded product has barbed structure, an undercutting or the like, the injection mold should depart its male die and female die along a direction which is not perpendicular or at a right angle to the separating surface. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0003]    The components of the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the embodiments of the present disclosure. Moreover, in the drawings, like reference numerals designate corresponding parts throughout several views. 
           [0004]      FIG. 1  is a schematic, isometric view of an angle pin structure, according to an exemplary embodiment of the present disclosure. 
           [0005]      FIG. 2  is an exploded view of an angle pin member of the angle pin structure of  FIG. 1 . 
           [0006]      FIG. 3  is similar to  FIG. 2 , but showing the angle pin member inverted. 
           [0007]      FIG. 4  is a schematic, isometric view of an injection mold incorporating the angle pin structure of  FIG. 1 . 
       
    
    
     DETAILED DESCRIPTION 
       [0008]    The disclosure is illustrated by way of example and not by way of limitation in the figures of the accompanying drawings in which like references indicate similar elements. It should be noted that references to “an” or “one” embodiment in this disclosure are not necessarily to the same embodiment, and such references mean “at least one.” The references “a plurality of” and “a number of” mean “at least two.” 
         [0009]      FIG. 1  illustrates an exemplary embodiment of an angle pin structure  100 . The angle pin structure  100  includes an angle pin member  10  and a sliding block  20 . The angle pin member  10  and the sliding block  20  slidably associate with each other. 
         [0010]      FIGS. 2-3  illustrate exploded views of the angle pin member  10 . The angle pin member  10  includes a base  11 , an angle pin  12 , elastic unit  13 , and a side-cover plate  14 . The base  11  is substantially a cuboid. The base  11  includes a first fitting surface  111 , a first side surface  114 , a backside surface  115  and a second side surface  116 . The first fitting surface  111  is opposite to the backside surface  115 , and the first side surface  114  is opposite to the second side surface  116 . The first side surface  114  and the second side surface  116  are perpendicularly connected to the first fitting surface  111  and the backside surface  115 . The side-cover plate  14  is in contact with and covers the first side surface  114 . The angle pin  12  protrudes from the first fitting surface  111  for a predetermined distance. A lengthwise direction of the angle pin  12  is inclined for a predetermined angle relative to the first fitting surface  111 . The elastic unit  13  protrudes out of the first fitting surface  111  and can be elastically pressed into the first fitting surface  111 . 
         [0011]    The angle pin  12  is fixed with the base  11 . In detail, the angle pin  12  and the base  11  can be integrally formed with each other, or the angle pin  12  can be detachably connected to the base  11 . In this embodiment, the angle pin  12  and the base  11  are detachably connected to each other. The angle pin member  10  further includes an assembling block  121 . The angle pin  12  is substantially a cylinder, one end of the angle pin  12  is fixedly connected to a surface of the assembling block  121 , and the other end of the angle pin  12  protrudes from the assembling block  121  along an inclined direction relative to the surface of the assembling block  121 . The base  11  defines a recess  112  in the backside surface  115 . The recess  112  passes through the second side surface  116 . The base  11  further defines an assembling hole  113  passing through from a bottom surface of the recess  112  to the first fitting surface  111 . The assembling block  121  can fit in the recess  112 . When the assembling block  121  is received and fixed in the recess  112 , the angle pin  12  can pass through the assembling hole  113  and the other end of the angle pin  112  protrudes out of the base  11  from the first fitting surface  111 . 
         [0012]    The elastic unit  13  includes a first elastic member  13   a  and a second elastic member  13   b.  Each of the first elastic member  13   a  and the second elastic member  13   b  includes a shaft  131  and an elastic element  132 . The shaft  131  includes a collar  1311  protruding from a peripheral surface of the shaft  131 . In this embodiment, the collar  1311  is substantially ring-shaped, and the collar  1311  is formed on a substantial middle portion of the shaft  131 . The elastic element  132  abuts against the collar  1311 . In this embodiment, the elastic element  132  is a spring. The elastic element  132  sleeves on an end of the shaft  131  and presses against the collar  1311 . The elastic unit  13  is elastically received in the base  11 , and an end of the shaft  131  away from the elastic element  132  protrudes out of the base  11  from the first fitting surface  111 . The end of the shaft  131  protruding from the base can be pressed into the first fitting surface  111 . The elastic unit  13  can be elastically received in the base  11  in a variety of ways. 
         [0013]    In this embodiment, the base  11  defines two first receiving grooves  1141  and two first guiding grooves  1142  in the first side surface  114 . Each of the two first guiding grooves  1142  passes through the first fitting surface  111 . Each first receiving groove  1141  communicates with a first guiding groove  1142 . A size of each of the first guiding grooves  1142  is smaller than the size of each of the first receiving grooves  1141 , thus a first step portion  1143  is formed between each first receiving groove  1141  and the corresponding first guiding groove  1142 . 
         [0014]    The side-cover plate  14  includes a top surface  140 , a third side surface  148  and a fourth side surface  149 . The third side surface  148  is opposite to the fourth side surface  149 . The top surface  140  is connected between the third side surface  148  and the fourth side surface  149 . The top surface  140  is coplanar with the first fitting surface  111  when the side-cover plate  14  covers the first side surface  114  and the third side surface  148  is in contact with the first side surface  114 . 
         [0015]    The side-cover plate  14  defines two second receiving grooves  141  and two second guiding grooves  142  in the third side surface  148  which substantially mirror the sizes and configurations of the two first receiving grooves  1141  and the two first guiding grooves  1142 . Each of the two second guiding grooves  142  passes through the top surface  140 . Each second receiving groove  114  communicates with a second guiding groove  142 . A size of each of the second guiding grooves  142  is smaller than the size of each of the second receiving grooves  141 , thus a second step portion  143  is formed between each second receiving groove  141  and a second guiding groove  142 . One of the first receiving grooves  1141  and one of the second receiving grooves  141  cooperatively form a receiving hole, and one of the first guiding grooves  1142  and one of the second guiding grooves  142  cooperatively form a guiding hole when the side-cover plate  14  is fixed to the base  11 . The other of the first receiving grooves  1141  and the other of the second receiving grooves  141  cooperatively form another receiving hole, and the other of the first guiding grooves  1142  and the other of the second guiding grooves  142  cooperatively form another guiding hole. Each first step portion  1143  and a second step portion  143  cooperatively form a ring-shaped step. In this embodiment, the side-cover plate  14  is fixed to the first side surface  114  by means of two bolts  15 . The first elastic member  13   a  is received in one receiving hole and one guiding hole as described above, and the second elastic member  13   b  is received in the other receiving hole and the other guiding hole. The shaft  131  passes through a guiding hole and protrudes from the first fitting surface  111  and the top surface  140 . In detail, the elastic element  132  and one end of the shaft  131  and the collar  1311  are received in the receiving hole. The elastic element  132  sleeves on the one end of the shaft  131 . The elastic element  132  elastically presses against the collar  1311  and a bottom of the receiving hole. The collar  1311  is captive in the receiving hole by virtue of the ring-shaped step, and the other end of the shaft  131  passes through the guiding hole and protrudes from the first fitting surface  111  and the top surface  140 . 
         [0016]    Referring to  FIG. 1 , the sliding block  20  includes a second fitting surface  21 . The second fitting surface  21  faces toward the first fitting surface  111 . The sliding block  20  defines an inclined hole  211  in the second fitting surface  21 . The central axis of the inclined hole  211  is inclined for the predetermined angle relative to the second fitting surface  21 . The angle pin  12  can be inserted into the inclined hole  211  to bring the second fitting surface  21  into contact with the first fitting surface  111 . 
         [0017]    When the second fitting surface  21  moves close to the first fitting surface  111  along the lengthwise direction of the angle pin  12 , the elastic unit  13  is gradually compressed by the second fitting surface  21 . The shaft  131  is totally received in the receiving hole and the guiding hole when the second fitting surface  21  is in contact with the first fitting surface  111 . In this way, elastic unit  13  acts as a shock absorber when the second fitting surface  21  moves close to the first fitting surface  111 . When the second fitting surface  21  and the first fitting surface  111  need to be separated, an elastic force provided by the elastic unit  13  helps to push away the second fitting surface  21 . In other embodiments, elastic unit can also be received or assembled in a sliding block. 
         [0018]    As shown in  FIG. 4 , the angle pin structure  100  can be used in an injection mold  30 . In detail, the injection mold  30  includes a male die  31  and a female die  32 . The angle pin member  10  is assembled in the male die  31 , and the sliding block  20  is assembled in the female die  32 . The first fitting surface  111  faces toward the second fitting surface  21 , and both are parallel to a separating surface of the injection mold  30 . In assembly, the angle pin  12  is inserted into the inclined hole  211  and the female die  32  can move close to the male die  31  along the lengthwise direction of the angle pin  12 . In other embodiments, the angle pin member can be assembled in a female die, and the sliding block can be assembled in a male die. 
         [0019]    The above-described angle pin structure uses the elastic unit which is received in the base to provide an elastic force between the sliding block and the angle pin member. When the sliding block moves close to the angle pin member, the elastic unit is compressed and acts as a shock absorber. When the sliding block moves away from the angle pin member, the elastic force helps to push the sliding block away. 
         [0020]    Although numerous characteristics and advantages of the present embodiments have been set forth in the foregoing description, together with details of the structures and functions of the embodiment, the disclosure is illustrative only, and changes may be made in detail, especially in the matters of shape, size, and the arrangement of parts within the principles of the disclosure to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.