JPH0359810B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention aims to rationalize the production of injection molding molds, and in particular, in the current mold production in which each molded product is made to order, the base part of the mold is attached to the molding machine. By making it possible to easily attach and detach only the mold parts (cavity, core) in the state of 2, it simplifies mold production, shortens production days, reduces costs, and saves money on molding machines. The aim is to streamline and simplify type exchange.

That is, to explain the configuration of the present invention, a stripper plate 2 and a movable side template 3 are installed relative to a fixed side template 1, an arbitrary cavity 4 is provided on the fixed side template 1, and a stripper plate 2 and a movable side template 3 are installed relative to each other. An arbitrary core 5 straddles the par plate 2 and the movable template 3
In the injection mold with the existing configuration in which the Both (the core product part 5b and the core body 5a, and the core product part 5b and the movable template 3) are placed on the upper surface of the core body 5a appropriately fitted into the template 3, or directly on the upper surface of the movable template 3. It is provided so as to be detachable and replaceable by appropriate means such as fitting the abutting portions into concave and convex portions.

In the above, ()...the core body 5a is a portion of the core 5 that is fixedly fitted into the movable side template 3 and is located astride the movable side template 3 and the stripper plate 2. The core product part 5b is a so-called core part, and corresponds to a core (male part) opposite to a cavity (female part).

()...Attachment of the core product part 5b to the upper surface of the core body 5a or the upper surface of the movable side template 3 can be done by, for example, using a recess formed relative to the upper surface of the core body 5a or the upper surface of the movable side template 3 and the lower surface of the core product part 5b. Fitting of convex portions 6a, 6b, or screwing of female and male threaded portions 7a, 7b, or concave, convex portions 6a, 6b
The above-mentioned unevenness is achieved by a combination of the fitting and screwing of the female and male threaded portions 7a and 7b, and the set bolt 8 screwed into an appropriate position close to the fitting and screwing portion. It is provided to maintain the fitted state or screwed state, and the installation and removal of the set bolt 8 and the uneven fitting,
By fitting and disengaging the screws, the core product part 5 is attached to the upper surface of the core body 5a or the upper surface of the movable template 3.
b can be attached and detached and replaced extremely easily and quickly.

()...The core body 5a is fixedly fitted into the movable side template 3 by processing and forming a fitting part on the side of the movable side template 3 and the stripper plate 2. The external shape can be arbitrary, such as cylindrical (circular cross section) or prismatic (square or rectangular cross section). For example, a small hole 9 for the temperature control circuit is bored on the central axis, and the partition plate 9a, pipe 9
It is also possible to install an ejector pin insertion hole 10 or the like.

Further, the planar shape of the core product part 5b, which is detachably and replaceably installed as described above on the upper surface of the core body 5a or the upper surface of the movable mold plate 3, can be any shape such as circular, square, or rectangular. In addition to the molding of circular molded products such as square boxes and box lids, it is also possible to form molds for processing square or rectangular molded products such as square boxes and box lids, and other arbitrary shapes that can be formed in the core product portion 5b. . Further, a small hole 9' for a temperature control circuit and an ejector pin insertion hole 10' may be formed in communication with the small hole 9 for a temperature control circuit and the ejector pin insertion hole 10 of the core body 5a.

()...The means for directly attaching the core body 5a to the upper surface of the movable side template 3 is exactly the same as the attachment of the core product part 5b to the core body 5a described in the above (), and includes the attachment and detachment of the set bolt 8 and The core product portion 5b can be attached to and removed from the movable mold plate 3 very easily and quickly by fitting with concave and convex parts, fitting with screws, and the like.

In this case, a small hole 9 for the temperature control circuit is formed in the movable template 3 itself, and the core product part 5b is
It communicates with the small hole 9' for the temperature control circuit.

()...A rotating core body 5'a is formed by attaching a gear 11 to the lower end of the core body 5a (in this case, the body has a circular cross section because it rotates).
This is rotatably fitted into the movable side mold plate 3 in advance in the same manner as above, and the rotating core body 5'a
A core product part 5'b for forming internal threads can be detachably attached to the rotary core 5' to form a rotating core 5' capable of forming internally threaded products such as internally threaded caps.
A bearing 17 receives rotation of the rotating core body 5'a.

Moreover, the rotating core main body 5'a is not used for rotation,
If the normal core part 5b (without internal thread forming) is removably attached to the normal core 5 (the core product part 5b is attached to and detached from the core body 5a) It has the advantage of being able to be used in the same way as the 2000 (exchangeably constructed).

()...The head is locked to the upper surface of the stripper plate 2 (parting line), the lower end is protruded into the cavity of the receiving plate 12 through the plate 2 and the movable template 3, and the stopper is attached to the protruding end. By installing the stopper restriction pin 14 to which the stopper plate 13 is attached, the stopper plate 2 can be opened from the movable template 3 by the guide of the stopper restriction pin 14 until it collides with the stopper 13 and stops. Therefore, the base part of the mold remains attached to the molding machine, and the core product part relative to the core body 5a or the movable mold plate 3 is removed in the expanded space between the stopper plate 2 and the movable mold plate 3. 5b can be easily and quickly replaced.

()...Furthermore, in the present invention, the core product part 5b can be easily attached and detached by opening the stripper plate 2 while the base part of the mold remains attached to the molding machine as described above. , the cavity part and the stripper part, which together with the core product part 5b are the main parts for forming the mold part, may have a common shape. It is desirable that these parts are also removable and replaceable.

Therefore, for example, the cavity part and the stripper part for the core product part 5b are formed as a cavity bush 4a and a stripper bush 2a having a nested structure, and the fixed side template 1
The core product part 5 is detachably fitted into installation parts 4b and 2b cut into the stripper plate 2 using fastening bolts 15 or the like.
If b, stripper bush 2a, and cavity bush 4a are made to be detachable and replaceable at the same time as a trio, the entire mold must be attached and detached from the molding machine each time the molded product is changed. However, according to the present invention, the purpose of replacing the mold can be achieved very easily and quickly by simply attaching and detaching the trio while the base portion of the mold remains attached to the molding machine.

()...The present invention replaces the core product portion 5b with the core body 5a.
Alternatively, since it is installed removably on the movable side template 3, the core product can be installed by installing a liner 16 on the fitting surface of both sides and adjusting the thickness dimension. The total height of the portion 5b can be easily adjusted. Therefore, core product department 5
It is possible to easily adjust and correct manufacturing errors and deviations due to use of b, and prevent the occurrence of burrs.

Also, in the same way, the cavity bush 4a
Also, the total height of the cavity bush 4a can be easily adjusted by installing the liner 16 on the fitting surface of the fixed side template 1 with the installation part 4b and adjusting its thickness. Therefore, the core product part 5b and the corresponding cavity bush 4
If each total height of a is adjusted appropriately, it becomes possible to form the mold part more precisely.

As described above, according to the present invention, the core product department is
The base part of the mold remains attached to the molding machine, and has the excellent feature that it can be installed, removed, and replaced extremely easily and accurately.In particular, the core product part, as well as the cavity bush and stripper bush, can be assembled as a trio. If it is detachable and replaceable, it will be easier and faster to replace and install just the mold part, simplifying the mold replacement work for the molding machine, and greatly reducing the production time.
It has major features such as cost reduction.

[Brief explanation of drawings]

FIG. 1 is a schematic vertical cross-sectional view of an injection molding die according to an embodiment of the present invention, and FIG. A diagram showing an example and an example of its installation state,
C and D are diagrams showing a configuration example of the core product part and the core body, Figure 4 is a diagram showing a configuration example in which the core product part is installed directly on the movable template, and Figure 3 is the rotating core body and its core product. It is a figure which shows the example of a structure of a part, and its installation state. Code, 1... Fixed side template, 2... Stripper plate, 2a... Stripper bush, 2b
... Installation part, 3 ... Movable side template, 4 ... Cavity, 4a ... Cavity bush, 5 ... Core,
5'... Rotating core, 5a... Core body, 5'a...
Rotating core body, 5b... Core product department, 5'b...
Core product part for internal thread forming, 6a, 6b...concave,
Convex portion, 7a, 7b...female, male threaded part, 8...set bolt, 9...small hole for temperature control circuit, 9'...small hole for temperature control circuit, 9a...partition plate, 9b...pipe, 10, 10'... Ejector pin insertion hole,
11...gear, 12...receiving plate, 13...stopper, 14...limiting pin for stripper, 15...
...Tightening bolt, 16...Liner, 17...Bearing.

Claims (1)

[Claims] 1. A stripper plate and a movable template are installed relative to a stationary template, an arbitrary cavity is provided in the fixed template, and a stripper plate and a movable template are also provided with a cavity. Therefore, in an injection mold in which an arbitrary core is appropriately fitted, a core product part constituting the core is separately provided, and the core product part is attached to the upper surface of the core body suitably fitted to the movable side template. , or an injection mold with a replaceable core product part, which is provided directly on the upper surface of the movable mold plate so that it can be attached and detached by appropriate means such as fitting the abutting parts of the two parts into convexes and convexes. 2. In the injection molding mold with replaceable core product parts as set forth in claim 1, the attachment of the core product part to the upper surface of the core body or the upper surface of the movable side mold plate is carried out in a manner that the core product part is attached to the upper surface of the core body or the upper surface of the movable side mold plate and the core. Fitting of uneven parts formed relatively on the lower surface of the product, screwing of female and male threaded parts, or combination of fitting of concave and convex parts and screwing of female and male threaded parts,
and a mold for injection molding with a replaceable core product part, which is provided so that the engagement is carried out by fitting the recesses and protrusions or maintaining the threaded state by means of set bolts screwed into appropriate positions. 3. In the injection molding mold with an exchangeable core product part as set forth in claim 1, the shape of the core body may be arbitrary, such as cylindrical (circular in cross section) or prismatic (square or rectangular in cross section); An injection mold with an exchangeable core product part, in which the planar shape of the core product part is appropriately circular, square, or rectangular. 4. In the injection molding mold with replaceable core product parts as set forth in claim 1, the core body is formed into a rotary core body by attaching a gear to the lower end, etc., and this is formed into a movable side mold plate. The internal thread forming core product part is detachably attached to the rotating core body to form an internal thread forming core. This is an injection mold with a replaceable core product part, in which the core product part (without) is removably attached to form a normal core. 5. In the injection molding mold with a replaceable core product part as set forth in claim 1, the base part of the mold remains attached to the molding machine, and the core product part can be replaced and attached by being guided by a stripper restriction pin. A mold for injection molding with a replaceable core product part, in which a stripper plate is opened according to the opening size limit, and the molding is carried out within the expanded space between the stripper plate and the movable mold plate. 6. In the injection mold with replaceable core product parts as set forth in claim 1, a cavity bushing is attached to the fixed side template, and a stripper bushing is attached to the stripper plate. Each nested type is formed so that it can be attached and detached freely,
While the base part of the mold is attached to the molding machine,
A mold for injection molding with an exchangeable core product part, in which the core product part can be attached and removed, and at the same time, the cavity bushing and stripper bushing can be attached and replaced. 7. In the injection mold with replaceable core product part as set forth in claim 1, by installing a liner on the fitting surface of the core body and the core product part, and adjusting the thickness of the liner,
An injection mold with an exchangeable core product part that allows the total height of the core product part to be adjusted. 8 In the injection molding die with replaceable core product parts as set forth in claim 1, when the cavity bushing is provided in a telescoping manner in a removable and replaceable manner with respect to the stationary side template, the fixed side template A mold for injection molding with an exchangeable core product part, in which a liner is installed on the fitting surface of the cavity bushing, and the total height of the cavity bushing is adjusted by adjusting the thickness of the liner.