Injection mold structure convenient to demold

Abstract

The injection mold structure comprises an upper mold and a lower mold which are correspondingly matched with each other, a fixing groove is formed in the center of the top of the lower mold, a mold groove is formed in the fixing groove through a fixing assembly, a lifting groove is formed in the bottom of the fixing groove, an ejector block is slidably mounted in the lifting groove, and the ejector block is slidably mounted in the lifting groove. The top of the ejector block penetrates through the bottom of the die cavity, a driving groove is formed in the bottom of the lifting groove, a horizontal transmission rod is arranged in the driving groove, and a cam is installed on the transmission rod. The ejection block capable of freely ascending and descending is arranged at the bottom of the mold groove, the cam is driven by the transmission rod to rotate, the ejection block is ejected upwards through the cam, an injection product in the mold groove is ejected out through the ejection block, demolding is convenient, and the injection product is prevented from being scratched during demolding; and the mold grooves are limited and fixed through the fixing assemblies, so that the mold grooves can be flexibly replaced, injection molding of different injection molding products is facilitated, and the application range of the mold is expanded.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an injection mold structure which is convenient for demoulding. Background Art

[0002] Injection molds are tools used to produce plastic products. They are also tools that give plastic products a complete structure and precise dimensions. Injection molding is a processing method used in mass production of certain parts with complex shapes. Usually, the heated and melted plastic is injected into the mold cavity by an injection molding machine under high pressure, and the molded product is obtained after cooling and solidification, and then the molded product is removed from the injection mold.

[0003] However, the existing injection molds have the following problems: the injection molded product adheres closely to the inner wall of the mold after cooling and forming, and is not easy to demould. When the injection molded product is taken out, it is easy to be scratched. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides an injection mold structure that is easy to demould, so as to solve the problem that the existing mold is difficult to demould and is prone to scratches and other damages when the injection molded product is taken out.

[0005] To achieve the above purpose, the utility model is implemented through the following technical solutions: an injection mold structure that is convenient for demolding, including an upper mold and a lower mold that correspond to each other, a fixed groove is opened at the top center of the lower mold, a mold groove is installed in the fixed groove through a fixing component, a lifting groove is opened at the bottom of the fixed groove, a top block is slidably installed in the lifting groove, the top of the top block passes through the bottom of the mold groove, a driving groove is opened at the bottom of the lifting groove, a horizontal transmission rod is arranged in the driving groove, and a cam is installed on the transmission rod.

[0006] Preferably, horizontal installation grooves are provided through both sides of the fixing groove, the fixing assembly is located in the installation groove, and fixing holes corresponding to the installation grooves are provided on both sides of the mold groove.

[0007] Preferably, the fixing assembly includes a sealing ring installed at the outer end opening of the mounting groove, a fixing column is arranged through the sealing ring, the inner end of the fixing column corresponds to the fixing hole, a handle is arranged at the outer end of the fixing column, a movable plate is arranged on the fixing column, the movable plate is located inside the mounting groove, a fixing spring is sleeved on the outer side of the fixing column, and the fixing spring is located between the movable plate and the sealing ring.

[0008] Preferably, vertical guide rods are provided at two diagonal positions on the upper surface of the lower mold, and guide holes corresponding to the guide rods are opened at the diagonals of the upper mold.

[0009] Preferably, one end of the transmission rod is fixed to the inner wall of the driving groove through a bearing seat, and the other end of the transmission rod horizontally penetrates the lower mold, and a connecting bearing is provided at one end that penetrates the lower mold.

[0010] Preferably, a limiting groove is provided on the surface of the transmission rod, and there are a plurality of cams, which are respectively fixed in the limiting grooves by bolts.

[0011] Preferably, the width dimension of the lifting slot is smaller than the width dimension of the fixing slot, and the width dimension of the lifting slot is smaller than the width dimension of the driving slot.

[0012] Preferably, the bottom edge of the top block extends horizontally outward to form a limiting edge, and a compression spring is arranged between the limiting edge and the groove top of the driving groove.

[0013] The utility model provides an injection mold structure that is convenient for demoulding, and has the following beneficial effects:

[0014] 1. The utility model sets a freely liftable top block at the bottom of the mold groove, uses a transmission rod to drive a cam to rotate, and uses the cam to lift the top block upward, so that the injection molded product in the mold groove is ejected through the top block, which is convenient for demoulding and avoids scratches on the injection molded product during demoulding.

[0015] 2. The utility model limits and fixes the mold groove by means of a fixing component, so that the mold groove can be flexibly replaced, thereby facilitating the injection molding of different injection molding products and expanding the application range of the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the main internal structure of the utility model;

[0017] Figure 2 It is a side view schematic diagram of the internal structure of the utility model;

[0018] Figure 3 It is a schematic diagram of the internal structure of the upper and lower molds of the utility model;

[0019] Figure 4 for Figure 1 A partial enlarged schematic diagram of area A;

[0020] Figure 5 It is a structural schematic diagram of the transmission rod of the utility model.

[0021] In the figure:

[0022] 1. Lower mold; 101. Fixed groove; 102. Drive groove; 103. Lifting groove; 104. Mounting groove; 2. Upper mold; 201. Guide hole; 3. Transmission rod; 301. Limiting groove; 4. Cam; 5. Ejector block; 6. Mold groove; 601. Fixed hole; 7. Compression spring; 8. Guide rod; 9. Fixed assembly; 901. Sealing ring; 902. Fixed column; 903. Moving plate; 904. Fixed spring; 905. Handle; 10. Limiting edge; 11. Connecting bearing.

[0023] The instruments in the utility model can be obtained through market purchase or private customization. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-5 The utility model provides a technical solution: an injection mold structure that is convenient for demoulding, including an upper mold 2 and a lower mold 1 that correspond to each other. A fixed groove 101 is opened at the top center of the lower mold 1, and a mold groove 6 is installed in the fixed groove 101 through a fixing component 9. A lifting groove 103 is opened at the bottom of the fixed groove 101, and a top block 5 is slidably installed in the lifting groove 103. The top of the top block 5 passes through the bottom of the mold groove 6. A driving groove 102 is opened at the bottom of the lifting groove 103, and a horizontal transmission rod 3 is arranged in the driving groove 102, and a cam 4 is installed on the transmission rod 3.

[0026] In this embodiment, horizontal installation grooves 104 are formed on both sides of the fixing groove 101 , the fixing assembly 9 is located in the installation groove 104 , and fixing holes 601 corresponding to the installation groove 104 are formed on both sides of the mold groove 6 .

[0027] In this embodiment, the fixing component 9 includes a sealing ring 901 installed at the outer end opening of the installation groove 104, a fixing column 902 is arranged through the sealing ring 901, the inner end of the fixing column 902 corresponds to the fixing hole 601, a handle 905 is arranged at the outer end of the fixing column 902, a movable plate 903 is arranged on the fixing column 902, the movable plate 903 is located inside the installation groove 104, a fixing spring 904 is sleeved on the outer side of the fixing column 902, and the fixing spring 904 is located between the movable plate 903 and the sealing ring 901. With such arrangement, when in use, the fixing column 902 is pulled outward by the handle 905, and the elastic force of the fixing spring 904 is overcome until the inner end of the fixing column 902 completely enters the installation groove 104, the mold groove 6 is placed in the fixing groove 101, and the fixing hole 601 is made coaxial with the installation groove 104, the handle 905 is released, and the movable plate 903 is pushed inward by the elastic force of the fixing spring 904 until the fixing column 902 is inserted into the fixing hole 601, and the mold groove 6 is limited and fixed by the cooperation of the fixing column 902 and the fixing hole 601.

[0028] In this embodiment, vertical guide rods 8 are provided at two diagonal positions on the upper surface of the lower mold 1, and guide holes 201 corresponding to the guide rods 8 are provided at the diagonals of the upper mold 2. The cooperation between the guide rods 8 and the guide holes 201 enables the upper mold 2 to be lifted and lowered vertically, which facilitates the closing and opening of the upper mold 2 and the lower mold 1.

[0029] In this embodiment, one end of the transmission rod 3 is fixed to the inner wall of the driving groove 102 through a bearing seat, and the other end of the transmission rod 3 horizontally penetrates the lower mold 1, and a connecting bearing 11 is provided at one end penetrating the lower mold 1. In this way, the end of the transmission rod 3 can be connected to an external driving device through the connecting bearing 11, such as being connected to the output end of a driving motor through the connecting bearing 11, and a reducer is provided between the output end of the driving motor and the connecting bearing 11, so that the transmission rod 3 can be driven to rotate slowly through the driving motor.

[0030] In this embodiment, the surface of the transmission rod 3 is provided with a limiting groove 301, and there are a plurality of cams 4, which are respectively fixed in the limiting groove 301 by bolts. As a preferred embodiment, a threaded hole is provided in the limiting groove 301, and a bolt is provided on the cam 4, and the cam 4 is fixedly installed in the limiting groove 301 by the cooperation of the bolt and the threaded hole.

[0031] In this embodiment, the width of the lifting slot 103 is smaller than the width of the fixing slot 101 , and the width of the lifting slot 103 is smaller than the width of the driving slot 102 .

[0032] In this embodiment, the bottom edge of the top block 5 extends horizontally outward to form a limiting edge 10, and a compression spring 7 is arranged between the limiting edge 10 and the groove top of the driving groove 102. In this arrangement, the elastic force of the compression spring 7 is used to push the limiting edge 10 downward, thereby moving the top block 5 downward, so that the top surface of the top block 5 is parallel to the bottom of the mold groove 6, which is convenient for injection molding of the injection molded product.

[0033] Working principle:

[0034] When in use, according to the requirements of the product to be injected, select a suitable mold groove 6, pull the fixing column 902 outwards through the handle 905, and overcome the elastic force of the fixing spring 904 until the inner end of the fixing column 902 completely enters the installation groove 104, put the mold groove 6 into the fixing groove 101, and make the fixing hole 601 coaxial with the installation groove 104, loosen the handle 905, and use the elastic force of the fixing spring 904 to push the moving plate 903 inwards until the fixing column 902 is inserted into the fixing hole 601. Through the cooperation of the fixing column 902 and the fixing hole 601, the mold groove 6 is limited and fixed. At this time, the protruding part of the cam 4 on the transmission rod 3 is horizontally biased to one side, and the elastic force of the compression spring 7 is used to push the limiting edge 10 downward, thereby moving the top block 5 downward, so that the top surface of the top block 5 is parallel to the bottom of the mold groove 6;

[0035] The injection molding material is injected into the mold groove 6, and the upper mold 2 is vertically lowered by the cooperation of the guide rod 8 and the guide hole 201 until the upper mold 2 and the lower mold 1 are closed. After the injection molded product is cooled and formed, the upper mold 2 rises to open the mold, exposing the injection molded product in the mold groove 6. The driving motor drives the cam 4 to rotate through the transmission rod 3, and the protruding part of the cam 4 rotates upward. The cam 4 is used to push the ejector block 5 upward, and the injection molded product in the mold groove 6 is ejected through the ejector block 5, so that the injection molded product is convenient to take out.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An injection mold structure for easy demoulding, comprising an upper mold (2) and a lower mold (1) correspondingly matched at the upper and lower ends, characterized in that: A fixing groove (101) is provided at the top center of the lower mold (1), a mold groove (6) is installed in the fixing groove (101) through a fixing component (9), a lifting groove (103) is provided at the bottom of the fixing groove (101), a top block (5) is slidably installed in the lifting groove (103), the top of the top block (5) passes through the bottom of the mold groove (6), a driving groove (102) is provided at the bottom of the lifting groove (103), a horizontal transmission rod (3) is arranged in the driving groove (102), and a cam (4) is installed on the transmission rod (3).

2. The injection mold structure for easy demoulding according to claim 1, characterized in that: Horizontal installation grooves (104) are provided on both sides of the fixing groove (101), the fixing assembly (9) is located in the installation groove (104), and fixing holes (601) corresponding to the installation grooves (104) are provided on both sides of the mold groove (6).

3. The injection mold structure for easy demoulding according to claim 2, characterized in that: The fixing assembly (9) comprises a sealing ring (901) installed at the outer end opening of the installation groove (104); a fixing column (902) is arranged through the sealing ring (901); the inner end of the fixing column (902) corresponds to the fixing hole (601); a handle (905) is arranged at the outer end of the fixing column (902); a movable plate (903) is arranged on the fixing column (902); the movable plate (903) is located inside the installation groove (104); a fixing spring (904) is sleeved on the outer side of the fixing column (902); the fixing spring (904) is located between the movable plate (903) and the sealing ring (901).

4. The injection mold structure for easy demoulding according to claim 1, characterized in that: Vertical guide rods (8) are arranged at two diagonal positions on the upper surface of the lower mold (1), and guide holes (201) corresponding to the guide rods (8) are opened at the diagonals of the upper mold (2).

5. The injection mold structure for easy demoulding according to claim 1, characterized in that: One end of the transmission rod (3) is fixed to the inner wall of the driving groove (102) via a bearing seat, and the other end of the transmission rod (3) horizontally penetrates the lower mold (1), and a connecting bearing (11) is provided at the end penetrating the lower mold (1).

6. The injection mold structure for easy demoulding according to claim 1, characterized in that: A limiting groove (301) is provided on the surface of the transmission rod (3), and a plurality of cams (4) are provided, each of which is fixed in the limiting groove (301) by means of bolts.

7. The injection mold structure for easy demoulding according to claim 1, characterized in that: The width dimension of the lifting groove (103) is smaller than the width dimension of the fixing groove (101), and the width dimension of the lifting groove (103) is smaller than the width dimension of the driving groove (102).

8. The injection mold structure for easy demoulding according to claim 1, characterized in that: The bottom edge of the top block (5) extends outward horizontally to form a limiting edge (10), and a compression spring (7) is arranged between the limiting edge (10) and the top of the driving groove (102).

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