TWI457225B - Mold and injection molding method using same - Google Patents

Description

Mold and method of injection molding using the same

The present invention relates to a mold and an injection molding method, and more particularly to a mold having a tooth insert and a method of injection molding using the mold.

With the development of optical imaging technology, lens modules are widely used in various imaging devices such as digital cameras and video cameras (see Capturing images with digital still cameras, Micro, IEEE Volume: 18, issue: 6, Nov.-Dec. 1998 Page(s): 14-19). Electronic devices such as mobile phones and notebooks that incorporate lens modules are favored by many consumers.

The lens module generally comprises a lens holder and a lens barrel. The lens holder has an internal thread structure, the lens barrel has an external thread structure, and the lens holder and the lens barrel are threadedly matched. The lens holder is usually manufactured by injection molding, and the internal thread structure of the lens holder is generally formed by tooth insertion. Before the injection molding, the tooth is driven into the cavity to form the internal thread structure of the lens holder; after the injection is cooled, the tooth is driven out of the cavity to exit the cavity (ie, the tooth is removed), and the mold is opened to remove the molded lens holder. mold.

In the prior art, the teeth are generally driven by a motor (for example, a hydraulic motor or a hydraulic motor, etc.) to achieve tooth withdrawal. During the tooth decay process, when the tooth is subjected to excessive torque due to the oil or the like caused by the material or the plastic, the motor still drives the tooth to continue to rotate. Therefore, it is easy for the tooth to smash the male mold, thereby damaging the mold, thereby increasing the cost of repairing or replacing the mold. Moreover, the teeth are broken At the same time, the male model may cause damage to the teeth themselves.

In view of the above, it is necessary to provide a mold and an injection molding method capable of preventing the teeth from being smashed into the male mold.

A mold comprising: a male template; a male mold disposed in the male template; a female template, the male template is disposed opposite to the female template; and a female mold disposed in the female template, the male The mold core is disposed opposite to the female mold core, and the male mold core cooperates with the female mold core to form a cavity; the tooth is inserted into the male template and the male mold, the dental implant The first end has a threaded structure; the motor has a motor, the motor is connected to the second end of the tooth, and the motor is used to drive the tooth into or out of the cavity; a rotational speed sensor, the rotational speed sensor being coupled to the motor for sensing the rotational speed of the motor; a control device electrically coupled to the control device and inputting the sensing thereof to the control device At a rotational speed, the control device is electrically connected to the motor to control the rotation of the motor, and the control device has a preset rotational speed range, when the rotational speed sensor senses the rotational speed outside the preset rotational speed range, The control device controls the motor to stop rotating.

A method for injection molding using the above mold, comprising the steps of: cooperating the male mold core with the female mold core to form a cavity; driving the dental entry into or out of the mold cavity, and the rotation speed sensor The rotation speed of the motor is sensed, and the rotation speed of the motor is transmitted to the control device. When the rotation speed of the motor is outside the preset rotation speed range, the control device controls the motor to stop rotating.

In the process of tooth withdrawal, when the tooth is subjected to excessive torque due to jamming, etc., the tooth movement is not smooth, thereby reducing the rotational speed of the motor. Compared with the prior art, when the speed of the motor is lower than the preset speed range, the control device controls the motor to stop rotating. Move, so as to avoid the teeth from smashing the male mold, and to avoid damage to the teeth themselves. Therefore, the above mold has the function of automatic protection, thereby reducing the possibility of mold damage, thereby reducing the cost of repairing or replacing the mold. The method of injection molding using the above-described mold has the same advantages as described above.

10‧‧‧Mold

102‧‧‧ mother template

104‧‧‧Female model

106‧‧‧public template

108‧‧‧Male model

110‧‧‧ teeth into the child

112‧‧‧Motor

114‧‧‧Speed sensor

116‧‧‧Control device

118‧‧‧ mirror base

1 is a schematic cross-sectional view of a mold provided by a preferred embodiment of the present invention.

The invention will be further described in detail below with reference to the accompanying drawings.

Referring to FIG. 1 , a mold 10 according to a preferred embodiment of the present invention includes a mother die 102 , a female die 104 , a male die 106 , a male die 108 , a tooth input 110 , a motor 112 , a rotational speed sensor 114 , a control device 116 , and Alarm device 120.

The female template 102 and the male template 106 are disposed opposite to each other, the female mold core 104 is disposed in the female template 102, and the male mold core 108 is disposed in the male template 106. The female mold core 104 is disposed opposite to the male mold core 108, and the female mold core 104 cooperates with the male mold core 108 to form a cavity (not labeled) for injection molding the workpiece. In the present embodiment, the workpiece to be injection molded is the mirror base 118.

The dental implant 110 is disposed in the male template 106 and the male mold 108. The first end of the dental implant 110 has a threaded structure for forming the internal threaded structure of the lens holder. The second end of the dental implant 110 is coupled to the motor 112. The motor 112 is used to drive the tooth inlet 110 forward or backward. Before the injection molding, the motor 112 drives the dental element 110 into the cavity to form an internal thread structure of the lens holder. After the injection is cooled, the motor 112 drives the tooth input 110. Exit the cavity (ie retreat). The motor can be various types of motors, such as hydraulic motors, hydraulic motors, electric motors, and the like. Preferably, motor 112 is a servo motor.

The speed sensor 114 is coupled to the motor 112 for sensing the rotational speed of the motor 112. control The device 116 is electrically coupled to the rotational speed sensor 114, and the rotational speed sensor 114 inputs its sensed rotational speed to the control device 116. The control device 116 is electrically coupled to the motor 112 while being electrically coupled to the alarm device 120. The control device 116 controls the rotation of the motor 112 based on the rotational speed of the motor 112 sensed by the rotational speed sensor 114, while controlling whether the alarm device 120 is alerted. Control unit 116 has a predetermined range of motor 112 speeds. When the actual rotational speed of the motor 112 is within the preset rotational speed range, the control device 116 maintains the motor 112 to rotate at a constant power; when the actual rotational speed of the motor 112 is outside the preset rotational speed range, the control device 116 controls the motor 112 to stop rotating while The control alarm device 120 alarms by, for example, a beep.

The working process of the mold 10 is as follows: the male mold 108 and the female mold 104 are combined to form a cavity. The motor 112 drives the dental entry 110 into the mold cavity and fills the mold cavity to form a semi-formed mirror mount 118. After the injection is cooled, the motor 112 drives the dental implant 110 out of the mold cavity. During the tooth decay process, when the tooth input 110 is subjected to excessive torque due to the oil or the like generated by the material or the plastic, the tooth input 110 does not move smoothly, thereby reducing the rotation speed of the motor 112. When the rotational speed of the motor 112 is lower than the preset rotational speed range, the control device 116 controls the motor 112 to stop rotating, thereby preventing the dental implant 110 from damaging the male mold 108 and avoiding damage to the dental implant 110 itself. At the same time, the control device 116 drives the alarm device 120 to alert by means of, for example, a beep, thereby notifying the maintenance personnel to troubleshoot. Therefore, the mold 10 has an automatic protection function, thereby reducing the possibility of damage of the mold 10, thereby reducing the cost of repairing or replacing the mold 10.

It can be understood that when the tooth input 110 is retracted, when the rotation speed of the motor 112 exceeds the preset rotation speed range, the control device 116 controls the motor 112 to stop rotating; similarly, when the tooth inlet 110 enters the cavity, when the motor When the speed of 112 is outside the preset speed range, control Device 116 also controls motor 112 to stop rotating.

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. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

10‧‧‧Mold

102‧‧‧ mother template

104‧‧‧Female model

106‧‧‧public template

108‧‧‧Male model

110‧‧‧ teeth into the child

112‧‧‧Motor

114‧‧‧Speed sensor

116‧‧‧Control device

118‧‧‧ mirror base

Claims (5)

A mold comprising: a male template; a male mold disposed in the male template; a female template, the male template is disposed opposite to the female template; and a female mold disposed in the female template The male mold core is disposed opposite to the female mold core, and the male mold core cooperates with the female mold core to form a cavity; the tooth is inserted into the male template and the male mold, The tooth has an opposite first end and a second end, the first end has a threaded structure; a motor, the motor is coupled to the second end of the tooth, the motor is used to drive the tooth into or Exiting the cavity; wherein the mold further comprises: a rotation speed sensor connected to the motor for sensing the rotation speed of the motor; and a control device, the rotation speed sensor Electrically connecting with the control device and inputting the sensed rotational speed to the control device, the control device being electrically connected to the motor to control the rotation of the motor, the control device having a preset rotational speed range, when the rotational speed is sensed The sensed speed is outside the preset speed range The control means controls the motor to stop rotating. The mold of claim 1, wherein the motor is a hydraulic motor, a hydraulic motor or an electric motor. The mold of claim 2, wherein the electric motor is a servo motor. The mold of claim 1, wherein the mold further comprises an alarm device electrically connected to the other output end of the control device, wherein the rotation speed of the motor is outside the preset rotation speed range The control device controls the alarm device to alarm. A method for injection molding using a mold according to claim 1, which comprises the steps of: engaging the male mold core with the female mold core to form a cavity; driving the dental entry into or exiting The cavity, while the rotational speed sensor senses the rotational speed of the motor, and transmits the rotational speed of the motor to the control device, when the rotational speed of the motor is outside the preset rotational speed range, The control device controls the motor to stop rotating.