Plastic mold with trimming function

Abstract

The utility model discloses a plastic mold with a trimming function, and relates to the technical field of plastic molds. The device comprises two base plates which are arranged up and down, and a plurality of hydraulic columns are connected between the two base plates; the movable mold plate is arranged at the bottom of the upper base plate, and a sealing head is arranged at the bottom of the movable mold plate; the fixed mold plate is arranged at the top of the base plate located on the lower portion, a mold cavity is formed in the top of the fixed mold plate, a cavity is formed in the fixed mold plate and located below the mold cavity, a lifting plate is arranged in the cavity through a lifting piece, an ejector rod is arranged on the lifting plate, and the free end of the ejector rod is inserted in the mold cavity in a sliding mode; the cavity is formed in the bottom of the mold cavity, the lifting plate in the cavity ascends and descends through the lifting piece, so that a workpiece is driven to be jacked through the jacking rod, the two blades are horizontally and slidably arranged at the top of the fixed mold plate and can define the annular cutting piece, and when the workpiece is jacked, the annular cutting piece cuts the edge of the workpiece, so that demolding and edge cutting of the workpiece are conducted at the same time; therefore, the production efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of plastic molds, and in particular to a plastic mold with a trimming function. Background Art

[0002] Plastic mold is the abbreviation of a combined mold used for compression molding, extrusion molding, injection molding, blow molding and low-foaming molding. The coordinated changes of the mold convex and concave molds and the auxiliary molding system can process a series of plastic parts of different shapes and sizes.

[0003] Existing plastic molds do not have a trimming function. When the product is injection molded and demolded, there will be extra corners around the product, and trimming is required with the help of cutting equipment, which reduces production efficiency. Therefore, the present application proposes a plastic mold with a trimming function. Utility Model Content

[0004] The purpose of this application is to solve the problems in the above background and provide a plastic mold with trimming function.

[0005] In order to achieve the above-mentioned purpose, this application specifically adopts the following technical solutions:

[0006] A plastic mold with trimming function, comprising:

[0007] Two base plates, which are arranged up and down and connected with a plurality of hydraulic columns;

[0008] The movable template is arranged at the bottom of the base plate located above, and a sealing head is arranged at the bottom thereof;

[0009] A fixed template is arranged on the top of the base plate located below, a mold cavity is opened on the top of the fixed template, a cavity is opened inside the fixed template and below the mold cavity, a lifting plate is arranged in the cavity through a lifting member, a push rod is arranged on the lifting plate, and a free end of the push rod is slidably inserted in the mold cavity;

[0010] The trimming mechanism includes two blades. Mounting plates are provided on the top of the fixed template and on both sides of the cavity. Slide rods are slidably penetrated on the two mounting plates. The two blades are respectively fixed at the opposite ends of the two slide rods. A trigger member is provided on the movable template. When the movable template is raised or lowered, the trigger member drives the two slide rods to slide in opposite directions synchronously.

[0011] Furthermore, the trigger member includes two first springs, which are respectively mounted on two sliding rods, and conical grooves are provided on both sides of the bottom of the movable template. Support plates are fixed on the two blades, and conical blocks are provided on the two support plates. The two conical blocks are respectively plugged into and matched with the two conical grooves.

[0012] Furthermore, the lifting member includes two second springs, both of which are connected between the lifting plate and the cavity. The top of the fixed template is provided with two through holes connected to the cavity, and the bottom of the movable template is provided with two resistance rods, which slide through the two through holes respectively.

[0013] Furthermore, two vertical rods are arranged in the cavity, the lifting plate is slidably sleeved on the two vertical rods, and two second springs are movably sleeved on the two vertical rods respectively.

[0014] Furthermore, the abutment rod comprises a sleeve fixedly arranged at the bottom of the fixed template, an inner rod is movably inserted in the sleeve, and a third spring is arranged between the inner rod and the inner wall of the sleeve.

[0015] Furthermore, the number of the top rods is several and they are distributed in a ring array.

[0016] Furthermore, a supporting plate is provided at one end of the plurality of ejector rods located in the mold cavity, and an outer side wall of the supporting plate is slidably overlapped with an inner side wall of the mold cavity.

[0017] Furthermore, slots are provided at four corners of the top of the fixed template, insertion rods are inserted into the slots, and a fourth spring is installed between the insertion rod and the slots.

[0018] The beneficial effects of this application are as follows:

[0019] In the present application, a cavity is opened at the bottom of the cavity, and the lifting plate in the cavity is lifted and lowered by the lifting member, thereby driving the workpiece to be lifted by the push rod, and two blades are arranged for horizontal sliding on the top of the fixed template. The two blades can be enclosed in a ring slice, and when the workpiece is lifted, the ring slices trim the workpiece, so that demolding and trimming of the workpiece can be carried out simultaneously, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural diagram of this application;

[0021] Figure 2 It is a sectional view of the three-dimensional structure of the present application;

[0022] Figure 3 It is another three-dimensional structural cross-sectional view of the present application;

[0023] Figure 4 is another three-dimensional structural cross-sectional view of the present application;

[0024] Figure 5 This is another three-dimensional structural cross-sectional view of the present application;

[0025] Figure 6 This application Figure 2 Enlarged view of point A in the middle;

[0026] 1. Base plate; 2. Hydraulic column; 3. Moving plate; 4. Head; 5. Fixed plate; 6. Cavity; 7. Cavity; 8. Lifting member; 9. Lifting plate; 10. Push rod; 11. Trimming mechanism; 12. Vertical rod; 13. Support plate; 14. Slot; 15. Insert rod; 16. Fourth spring; 801. Second spring; 802. Through hole; 803. Resistance rod; 8031. Sleeve; 8032. Inner rod; 8033. Third spring; 1101. Blade; 1102. Mounting plate; 1103. Sliding rod; 1104. Trigger member; 11041. First spring; 11042. Conical groove; 11043. Support plate; 11044. Conical block. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0028] like Figure 1-Figure 6 As shown, a plastic mold with a trimming function proposed in one embodiment of the present application includes: two substrates 1, which are arranged up and down and connected with a plurality of hydraulic columns 2; a movable template 3, which is arranged at the bottom of the upper substrate 1, and a head 4 is arranged at the bottom; a fixed template 5, which is arranged at the top of the lower substrate 1, and a cavity 6 is opened on the top of the fixed template 5. Preferably, the head 4 corresponds to the cavity 6. The hydraulic column 2 works, thereby driving the upper substrate 1 to move downward, thereby driving the movable template 3 to move downward. When the head 4 and the top of the fixed template 5 are aligned, the mold cavity 6 is formed. After the parts are overlapped, the sealing head 4 blocks the cavity 6, thereby completing the mold closing. A cavity 7 is opened inside the fixed template 5 and below the cavity 6. A lifting plate 9 is arranged in the cavity 7 through a lifting member 8. A push rod 10 is arranged on the lifting plate 9. The free end of the push rod 10 is slidably inserted in the cavity 6. Preferably, when the bottom of the lifting plate 9 overlaps the cavity 7, the top of the push rod 10 is just flush with the inner bottom wall of the cavity 6. After the workpiece in the cavity 6 is injection molded, the lifting member 8 drives the lifting plate 9 to rise, so that the push rod 10 pushes the workpiece out of the cavity 6.

[0029] The trimming mechanism 11 includes two blades 1101. A mounting plate 1102 is provided on the top of the fixed template 5 and on both sides of the cavity 6. A slide bar 1103 is slidably penetrated through the two mounting plates 1102. The two blades 1101 are respectively fixed at the opposite ends of the two slide bars 1103. A trigger member 1104 is provided on the movable template 3. When the movable template 3 is raised or lowered, the trigger member 1104 drives the two slide bars 1103 to slide synchronously in the opposite direction. Preferably, the cavity 6 is constructed as a cylindrical The cavity is used for injection molding of cylindrical workpieces. The blade 1101 is constructed in a semicircular shape. When the two slide bars 1103 slide close to each other, the two blades 1101 can enclose and slice in a ring. Preferably, when the movable template 3 descends, the trigger member 1104 drives the two slide bars 1103 to move away from each other, so that the two blades 1101 move away from each other. In this state, the blade 1101 will not hinder the sealing of the head 4 and the cavity 6. After the workpiece is injection molded and the movable template 3 moves up, , the trigger member 1104 drives the two sliding bars 1103 to approach each other, so that the two blades 1101 are enclosed to form a ring slice, and the inner diameter of the ring slice is adapted to the outer diameter of the workpiece. When the lifting member 8 drives the lifting plate 9 to rise and the push rod 10 lifts the workpiece upward, the workpiece passes through the enclosed ring slice, and the enclosed ring slice cuts off the waste material on the surface of the workpiece, thereby completely trimming the edges. The overall structure of the device is that the two blades 1101 are horizontally slidably arranged on the top of the fixed template 5. When the movable template 3 is lifted, the trigger member 1104 is used to drive the two blades 1101 to move synchronously in the opposite direction. When the mold is closed, the two blades 1101 move away from each other so that no obstacle is caused to the mold closing. When the mold is opened, the two blades 1101 are enclosed to form a ring slice, and the workpiece passes through the ring slice under the lifting of the push rod 10. The ring slice cuts off the waste material on the surface of the workpiece, thereby completing the trimming operation. Demolding and trimming are carried out in coordination with each other, thereby improving production efficiency.

[0030] like Figure 3 and Figure 4As shown, in some embodiments, the trigger member 1104 includes two first springs 11041, and the two first springs 11041 are respectively sleeved on the two slide bars 1103. Conical grooves 11042 are provided on both sides of the bottom of the movable template 3. Support plates 11043 are fixed on the two blades 1101. Conical blocks 11044 are provided on the two support plates 11043. The two conical blocks 11044 are respectively plugged into the two conical grooves 11042. Preferably, the number of slide bars 1103 on the same blade 1101 is two, and the first spring 11041 is located between the blade 1101 and the mounting plate 1102. When the movable template 3 is away from the fixed template 5, the first spring 11041 is 041, the two blades 1101 are surrounded in a circular slice. As the movable template 3 moves downward, the two conical blocks 11044 are respectively plugged into the two conical grooves 11042, and the conical surfaces of the conical blocks 11044 overlap with the conical surfaces of the conical grooves 11042. By utilizing the friction of the conical surfaces, when the movable template 3 moves downward, the two support plates 11043 move away from each other, thereby driving the two blades 1101 away from each other, so that the blades 1101 squeeze the first spring 11041. When the mold is opened, the movable template 3 rises, and under the elastic force of the first spring 11041, the two blades 1101 are driven to move closer to each other and surround in a circular slice, thereby cutting the edges of the formed workpiece.

[0031] like Figure 2 and Figure 6 As shown, in some embodiments, the lifting member 8 includes two second springs 801, and the two second springs 801 are connected between the lifting plate 9 and the cavity 7. Preferably, the second spring 801 is located at the bottom of the lifting plate 9, and the top of the fixed template 5 is provided with two through holes 802 connected to the cavity 7. The bottom of the movable template 3 is provided with two resistance rods 803, and the two resistance rods 803 slide through the two through holes 802 respectively. When the movable template 3 is away from the fixed template 5, under the elastic force of the second spring 801, the lifting plate 9 overlaps with the inner top wall of the cavity 7, so that the end of the ejector rod 10 is placed in the cavity 6. As the movable template 3 moves downward, the ends of the two resistance rods 803 slide through the two through holes respectively. 802, and respectively resist the two ends of the lifting plate 9. Under the action of the resistance force, the lifting plate 9 moves down and squeezes the second spring 801, so that the push rod 10 moves down and its top is flush with the inner bottom wall of the cavity 6 to facilitate the injection of the workpiece. After the workpiece is injection-molded, the movable template 3 moves up, and the resistance rod 803 moves upward and releases the resistance to the lifting plate 9. At this time, the second spring 801 is released, and under the resistance of the elastic force of the second spring 801, the lifting plate 9 is driven to move up, so that the push rod 10 is used to lift the workpiece to cooperate with the ring slicing for trimming. The overall structure utilizes the lifting and lowering (opening or closing the mold) of the movable template 3 to drive the push rod 10 to lift and demold the workpiece, thereby improving practicality.

[0032] like Figure 6 As shown, in some embodiments, two vertical rods 12 are provided in the cavity 7, the lifting plate 9 is slidably mounted on the two vertical rods 12, and the two second springs 801 are movably mounted on the two vertical rods 12 respectively. The vertical rods 12 are provided to guide the second springs 801 to avoid non-axial bending deformation, so as to maximize the use of their elastic force to lift the workpiece, and ensure that the workpiece is effectively cut by the blade 1101 during lifting, thereby improving practicality.

[0033] like Figure 6 As shown, in some embodiments, the resistance rod 803 includes a sleeve 8031 ​​fixed to the bottom of the fixed template 5, an inner rod 8032 is movably inserted in the sleeve 8031, and a third spring 8033 is arranged between the inner rod 8032 and the inner wall of the sleeve 8031. In order to make the device more reasonable, it should be noted that the elastic force of the third spring 8033 is greater than the elastic force of the second spring 801. When the movable template 3 moves downward, the inner rod 8032 resists the lifting plate 9, and the second spring 801 is first elastically compressed. After the lifting plate 9 overlaps with the bottom of the cavity 7, the third spring 8033 is elastically compressed again (that is, when the lifting plate 9 moves to the bottom, the movable template 3 can still continue to move downward a certain distance). When the movable template 3 moves upward, since the elastic force of the third spring 8033 is greater than the elastic force of the second spring 801, when the resistance rod 803 moves upward, the third spring 8 When the movable template 3 is moved upward, the third spring 8033 releases the elastic pressure, and the second spring 801 remains in a compressed state. The lifting plate 9 will not rise initially. Only after the movable template 3 rises a certain distance, the second spring 801 releases the elastic pressure and the lifting plate 9 rises. Since the enclosure of the two blades 1101 and the lifting of the workpiece both rely on the lifting and lowering movement of the movable template 3, a time difference can be adjusted by setting the third spring 8033. That is, when the mold is opened, the movable template 3 rises a certain distance, and the two blades 1101 are successfully enclosed in a ring slice before the lifting plate 9 rises, and the workpiece is lifted by the push rod 10, so that the ring slice enclosed by the blades 1101 can effectively cut the surface of the workpiece, thereby improving practicality.

[0034] like Figure 2 and Figure 3As shown, in some embodiments, the number of ejector pins 10 is several and they are distributed in a circular array. When the ejector pins 10 drive the workpiece to rise, during the initial rise, the cavity 6 will guide and limit the workpiece so that the workpiece always maintains a vertical rising state. However, the ring slice needs to effectively trim the workpiece. Therefore, the workpiece needs to completely pass the ring slice. By arranging several ejector pins 10 in an array, it is not only used to increase the contact area with the workpiece and reduce the top mark damage caused by lifting, but also ensure that when the workpiece completely passes the ring slice in time, its bottom has sufficient support area to ensure that it will not fall and slide.

[0035] like Figure 3 and Figure 6 As shown, in some embodiments, a support plate 13 is provided at one end of several push rods 10 located in the cavity 6, and the outer wall of the support plate 13 is slidably overlapped with the inner wall of the cavity 6. When the workpiece is trimmed, the cut scraps and chips will fall downward. When the push rod 10 drives the support plate 13 to lift the workpiece, the support plate 13 blocks the cavity 6 in real time to prevent the cut chips from falling into the cavity 6, thereby ensuring the continuous injection molding of subsequent workpieces, thereby improving practicality.

[0036] like Figure 5 As shown, in some embodiments, slots 14 are provided at the four corners of the top of the fixed mold plate 5, and an insertion rod 15 is inserted in the slot 14. A fourth spring 16 is installed between the insertion rod 15 and the slot 14. When the movable mold plate 3 moves down to close the mold with the fixed mold plate 5, the head 4 will contact and overlap with the fixed mold plate 5. Through the provided insertion rod 15 and the fourth spring 16, when the movable mold plate 3 is closed, the movable mold plate 3 first contacts the insertion rod 15 and squeezes the fourth spring 16. The elastic force of the fourth spring 16 is used to buffer the contact force during the closing of the mold to prevent the head 4 from affecting and colliding with the fixed mold plate 5, thereby increasing the service life of the entire mold.

[0037] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A plastic mold with trimming function, characterized in that: include: Two base plates (1) are arranged vertically and connected with a plurality of hydraulic columns (2); a movable plate (3) is arranged at the bottom of the base plate (1) located at the top, and a head (4) is arranged at the bottom; a fixed plate (5) is arranged at the top of the base plate (1) located at the bottom, a mold cavity (6) is provided at the top of the fixed plate (5), a cavity (7) is provided inside the fixed plate (5) and below the mold cavity (6), a lifting plate (9) is provided in the cavity (7) via a lifting member (8), a push rod (10) is provided on the lifting plate (9), and the free end of the push rod (10) is slidably inserted in the mold cavity (6); The trimming mechanism (11) comprises two blades (1101), a mounting plate (1102) is provided on the top of the fixed die plate (5) and on both sides of the die cavity (6), a slide bar (1103) is slidably penetrated through the two mounting plates (1102), the two blades (1101) are respectively fixed at opposite ends of the two slide bars (1103), and a trigger member (1104) is provided on the movable die plate (3), and when the movable die plate (3) is raised or lowered, the trigger member (1104) drives the two slide bars (1103) to slide synchronously in opposite directions.

2. The plastic mold with trimming function according to claim 1, characterized in that: The trigger member (1104) comprises two first springs (11041), the two first springs (11041) are respectively sleeved on the two sliding rods (1103), the bottom sides of the movable template (3) are provided with conical grooves (11042), the two blades (1101) are fixed with support plates (11043), the two support plates (11043) are provided with conical blocks (11044), and the two conical blocks (11044) are respectively plugged into the two conical grooves (11042).

3. The plastic mold with trimming function according to claim 1, characterized in that: The lifting member (8) comprises two second springs (801), the two second springs (801) are connected between the lifting plate (9) and the cavity (7), the top of the fixed template (5) is provided with two through holes (802) connected to the cavity (7), and the bottom of the movable template (3) is provided with two abutment rods (803), and the two abutment rods (803) slide through the two through holes (802) respectively.

4. The plastic mold with trimming function according to claim 3, characterized in that: Two vertical rods (12) are arranged in the cavity (7), the lifting plate (9) is slidably sleeved on the two vertical rods (12), and the two second springs (801) are movably sleeved on the two vertical rods (12), respectively.

5. The plastic mold with trimming function according to claim 3, characterized in that: The resisting rod (803) comprises a sleeve (8031) fixedly arranged at the bottom of the fixed template (5), an inner rod (8032) being movably inserted in the sleeve (8031), and a third spring (8033) being arranged between the inner rod (8032) and the inner wall of the sleeve (8031).

6. The plastic mold with trimming function according to claim 1, characterized in that: The number of the top rods (10) is several and they are distributed in a ring array.

7. The plastic mold with trimming function according to claim 6, characterized in that: A supporting plate (13) is provided at one end of the plurality of ejector rods (10) located in the mold cavity (6), and an outer side wall of the supporting plate (13) is slidably overlapped with an inner side wall of the mold cavity (6).

8. The plastic mold with trimming function according to claim 1, characterized in that: The top four corners of the fixed template (5) are each provided with a slot (14), an insertion rod (15) is inserted into the slot (14), and a fourth spring (16) is installed between the insertion rod (15) and the slot (14).

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