TWI419786B - Clamping apparatus - Google Patents

Description

Clamping device

The present invention relates to the field of lens manufacturing technology, and more particularly to a clamping device for clamping an ejection element with an optical element to be cut.

At present, the lens is mostly made of glass or plastic, and the manufacturing technology is relatively mature, and is generally produced by an injection molding process. Specifically, the injection molding process includes steps of injection, pressure holding, cooling, demoulding, shearing, and subsequent processing.

Please refer to FIG. 1, which is a schematic view of an injection element 10 with a plastic lens to be cut which is ejected by an injection molding machine. The injection element 10 comprises a semi-finished product of a plastic lens 12 formed from a mold of four cavities. The four lenses 12 are located on the same circumference and are connected to each other by a runner head 14 and a runner head 16. After the lens 12 is formed, it is transported to the shear zone along with the runner head 14 and the runner head 16 for shearing to separate it from the runner head 14 and the runner head 16.

When the plastic lens 12 is being cut, the sprue head 14 and the runner head 16 are fixed by the clamping device 22. Referring to Figure 2, the top of the clamping device 22 is provided with two grooves 23 for gripping the runner head 16. The two grooves 23 are respectively distributed in the radial direction of the same circumference and intersect at the center of the circumference. When cutting, the flow path head 16 is first accommodated in the groove 23, and the lens 12 is located outside the groove 23, and then the lens shearing machine can perform the cutting operation.

In order to improve production efficiency, eight, sixteen or even more modules are usually used in production. The mold of the hole molds the lens. As the number of cavities increases, that is, the number of lenses arranged on the same circumference increases, causing the radius of the circumference to increase, that is, the length of the flow path increases, which requires the length of the groove to be correspondingly increased, and the groove of the holding device 22 The length of the groove 23 is limited, that is, the molds for the different number of cavity numbers need to be arranged one by one with the grooves corresponding to the flow path size, which undoubtedly increases the production cost. In addition, when a lens is produced using a mold having a different number of cavity numbers, it is necessary to replace the holding device corresponding to the length of the groove, which will reduce the production efficiency.

In view of the above, it is necessary to provide a clamping device capable of fixing an optical component produced by a mold having a different number of cavities to save production cost and increase production efficiency.

Hereinafter, an embodiment of a holding device capable of fixing a lens produced by a mold having a different number of cavities will be described by way of an example.

The clamping device is used to clamp the injection element. The ejection element includes at least one material to be removed and an optical element to be sheared connected to the material. The clamping device includes a clamping portion, a fixing portion and a plurality of supporting portions. The clamping portion includes an elastic body and a plurality of clamping members. The plurality of clamping members are connected to each other by the elastic body. One end of each support portion is connected to the fixing portion, and the other end is connected to a corresponding clamping member for supporting the elastic member to support the corresponding clamping member on the same circumference centered on the fixing portion. The end of each clamping member is provided with a notch for receiving the material head.

Compared with the prior art, in the clamping device of the present invention, since the clamping member is located on the circumference centered on the fixing portion, the telescopic elastic body can adjust the distance between the clamping member and the fixed shaft to the flow of the mold. The length of the track makes the clamping device of the technical solution suitable for fixing the injection components of the mold production of different cavity, thereby saving cost and improving production efficiency.

10,200‧‧‧jecting components

12, 210‧‧‧ lenses

14‧‧‧Spinner head

16, 230‧‧‧ runner head

23‧‧‧ trench

22, 100‧‧‧ clamping device

110‧‧‧ gripping department

120‧‧‧Fixed Department

130‧‧‧Support

111‧‧‧ Elastomers

112‧‧‧Clamping parts

1121‧‧‧ end face

1122‧‧‧ first side

1123‧‧‧ second side

1124‧‧‧ inner wall

1120‧‧‧ gap

1125‧‧‧First storage trough

1126‧‧‧Second holding trough

121‧‧‧Fixed shaft

122‧‧‧Loading Department

1211‧‧‧ clamping surface

1201‧‧‧ side wall

1202‧‧‧3rd storage trough

1203‧‧‧4th storage trough

1221‧‧‧ bearing surface

131‧‧‧Support shaft

132‧‧‧Flexible parts

220‧‧‧ material head

Figure 1 is a schematic illustration of an injection element with a lens to be cut that is ejected by an injection molding machine.

2 is a schematic view of a conventional clamping device for holding an injection element.

3 is a schematic view of a clamping device provided by a first embodiment of the present technical solution.

Figure 4 is an exploded perspective view of the holding device shown in Figure 3.

Figure 5 is a schematic view showing the clamping device of Figure 3 clamping the injection element.

The clamping device provided by the technical solution will be described in detail below with reference to the embodiments and the accompanying drawings.

Referring to FIG. 3 and FIG. 4 , the clamping device 100 provided by the embodiment of the present invention includes a clamping portion 110 , a fixing portion 120 , and a plurality of supporting portions 130 . The clamping portion 110 is located on a circumference centered on the fixing portion 120. Each of the support portions 130 is disposed in the radial direction of the circumference, and has one end connected to the fixing portion 120 and the other end connected to the clamping portion 110.

The clamping portion 110 includes an elastic body 111 and a plurality of clamping members 112 which are arcuate cylinders. The elastic body 111 penetrates through each of the clamping members 112 so as to cooperate with the respective clamping members 112 to form an annular structure. The elastomer 112 can be a spring, rubber band or other resilient element.

Specifically, the clamping member 112 has an end surface 1121, a first side surface 1122, a second side surface 1123, and an inner wall 1124. The first side surface 1122 and the second side surface 1123 are respectively connected to the end surface 1121, and the first side surface 1122 is opposite to the second side surface 1123. The inner wall 1124 is located between the first side surface 1122 and the second side surface 1123, and is respectively opposite to the first side surface 1122. The second side surface 1123 and the end surface 1121 are connected. The end of the clamping member 112 including the end surface 1121 is provided Notch 1120. The shape and size of the notch 1120 is matched with the shape and size of the removal head to accommodate the material head and the lens to be cut is located outside the area enclosed by the clamping members 112. The clamping member 112 has a first receiving groove 1125 and a second receiving groove 1126 from the inner wall 1124. The first receiving groove 1125 is located between the second receiving groove 1126 and the elastic body 111. The elastic body 111 penetrates the first side surface 1122 and the second side surface 1123 such that the plurality of clamping members 112 are connected to each other by the elastic body 111 and are on the same circumference.

The fixing portion 120 includes a fixed shaft 121 and a bearing portion 122 connected to the fixed shaft 121.

The fixed shaft 121 has a cylindrical shape and includes a clamping surface 1211 for subsequently carrying the runner head of the injection element. The fixed shaft 121 is provided with a plurality of third receiving slots 1202 and a plurality of fourth receiving slots 1203 from the side wall 1201. The third receiving groove 1202 is located between the fourth receiving groove 1203 and the elastic body 111. The number of the third receiving slots 1202 is the same as the number of the first receiving slots 1125, and the number of the fourth receiving slots 1203 is the same as the number of the second receiving slots 1126.

The carrying portion 122 is for fixing the fixed shaft 121 and the carrying nip 110. In this embodiment, the bearing portion 122 has a cylindrical shape and has a bearing surface 1221. When the bearing surface 1221 is sized such that the elastic body 111 shape variable reaches a maximum, the clamping portion 110 can still be carried on the fixing portion 120.

Of course, the fixing portion 120 may not include the bearing portion 122, but directly change the size of the fixed shaft 121 to the fixed shaft 121 to be stably placed on the shearing device and to clamp the injection member.

The support portion 130 is a stretchable member whose length is adjustable. In this embodiment, the support portion 130 includes a support shaft 131 and an elastic member 132 disposed corresponding to the support shaft 131. The two ends of the support shaft 131 are respectively received in the first receiving slot 1125 and the third receiving slot 1202, and the elastic member The two ends of the 132 are respectively welded to the side wall 1201 of the fixing portion 110 and the inner wall 1124 of the clamping member 112. Both ends of the support shaft 131 abut against the fixing portion 120 and the clamping member 112, respectively. The resilient member 132 can be a spring or other resilient member commonly used in the art to impart a force to the clamping member 112 along the central axis of the resilient member 132. The supporting shaft 131 is used to give the fixing portion 120 and the clamping member 112 a force opposite to the elastic force of the elastic member 132 to cooperate with the elastic body 111 to keep the distance between the clamping member 112 and the fixing portion 120 constant.

In this embodiment, the elastic body 111, the elastic member 132, and the support shaft 131 between the elastic body 111 and the elastic member 132 are used to balance and fix the clamping portion 110. However, the elastic member 132 is not required. The bottom of the clamping member 112 penetrates the elastic body, and the support shaft 131 abuts against the position of the clamping member 112 between the two elastic bodies to balance and fix the clamping member 112. .

Further, the number of the support portions 130 is not limited to four. The clamping device of the present technical solution may include 2n spaced-apart support portions, each of which is separated by an angle of 360/2n degrees, wherein n is an integer greater than or equal to 2. The support portion 130 can also be a telescopic sleeve having a card member that is common in the art. When the two sleeves of the telescopic sleeve are moved relative to each other by stretching or compressing to make the length of the telescopic sleeve reach a required length, the latching member fixes the two sleeves of the telescopic sleeve so that the sleeve The two sleeves of the telescoping sleeve no longer create relative motion and maintain the length of the telescoping sleeve to the desired length.

Further, the support portion 130 may be a constant length structure. Correspondingly, it is necessary to make a support portion that is consistent with the length of the flow path for the molds of different flow path lengths. When the injection element is fixed by the holding device, both ends of the support portion may abut against the outer side walls of the clamp member 112 and the fixed shaft 121, respectively.

The elastic body 111 may not penetrate the holding member 112 as long as the plurality of holding members 112 can be enclosed in an annular structure by the elastic body 111. Each of the clamping members 112 can be fixed to the elastic body 111, It can also be slidably coupled to the elastic body 111.

Please refer to FIG. 5 , which is a schematic diagram of the use of the clamping device 100 for clamping the injection element 200 in the embodiment. The ejection element 200 includes four plastic lenses 210 to be cut. The four plastic lenses 210 are located on the same circumference centered on the runner head 220, and are connected to each other by a runner head 220 and four runner heads 230.

The operation of holding the plastic lens 210 to be cut using the holding device 100 will be specifically described below.

(1) The support shaft 131 and the elastic body 111 are used to adjust the distance between the clamping member 112 and the fixed shaft 121 to the length of the flow channel head 230, and the length is fixed by the support shaft 131.

(2) The injection member 200 with four plastic lenses 210 is ejected by an injection molding machine. Generally, the plastic lens is connected with at least one material head to be removed; and the number of the most formed lenses at one time is related to the number of cavity molds of the molding die, and the more the number of cavity points, the more the number of molded lenses at a time. In this embodiment, the number of mold holes for the injection molding die is four, and the maximum number of molded lenses at one time is four, that is, four plastic lenses 210 to be cut, which are made of the runner material head 220 and the four flow channels. The heads 230 are connected to each other.

(3) The ejection member 200 is transported to the shearing region by the robot arm, and the runner head 220 connected to the plastic lens 210 is placed on the clamping surface 1211 of the fixed shaft 121, so that the flow channel head 230 is located on the fixed shaft 121. Between the clamping member 112 and the clamping member 112, the lens 210 is located outside the region enclosed by the clamping portion 110, thereby fastening the plastic lens 210 to be cut.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Anyone who is familiar with the skill of this case is assisted by the present invention. Equivalent modifications or variations made by the spirit are to be covered by the following patents.

100‧‧‧Clamping device

110‧‧‧ gripping department

120‧‧‧Fixed Department

130‧‧‧Support

Claims (7)

A clamping device for clamping an injection element, the injection element comprising at least one material to be removed and an optical element to be cut connected to the material head, wherein the clamping device comprises a clamping portion and a fixing portion And a plurality of supporting portions, the clamping portion comprises an elastic body and a plurality of clamping members, wherein the plurality of clamping members are connected to each other by an elastic body, one end of each supporting portion is connected to the fixing portion, and the other end is connected with a corresponding clamping member Connected, which cooperates with the elastic body to support the corresponding clamping members on the same circumference centered on the fixing portion, and the end portions of the clamping members are provided with a notch for receiving the material head. The holding device of claim 1, wherein the elastic body penetrates each of the clamping members. The holding device of claim 2, wherein each of the clamping members is slidably coupled to the elastic body. The holding device of claim 1, wherein each of the clamping members is fixed to the elastic body. The holding device of claim 3, wherein the support portion is a stretchable member. The clamping device of claim 5, wherein the supporting portion comprises an elastic member and a supporting shaft, wherein the elastic member is disposed corresponding to the supporting shaft, and both ends of the elastic member and the supporting shaft are respectively respectively It is connected to the fixing part and the clamping part. The clamping device of claim 6, wherein the fixing portion comprises a fixing shaft and a bearing portion, and the bearing portion is connected to the fixing shaft for carrying the clamping portion and the fixing shaft.